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2016 Vol. 33, No. 2
Published: 2016-02-15
Geology and Subgrade
Bridge Engineering
Tunnel Engineering
Electrification Engrinnering
Research on Railway Networks
Survey and Design
Urban Rail Construction
Orignal Article
 
       Research on Railway Networks
1 Deepen Research on the Railway Hub Layout Planning ; Evaluation System Hot!
LEIZhong-lin
Research purposes ： Railway hub layout planning ; evaluation has not been perfect and lacks scientific evaluation system R methods. Some railway hub layout planning is difficult to judge the merits likely to cause some aspects exaggerated and other aspects ignored of the comprehensive factors. Railway and local administration only stand on our own point of view to judge layout plan， while the railway administration side most likely to choose the most beneficial own programs. The planning scheme sometime is a blueprint paper. The paper discussed the meaning of each indicator，proposed treatment and quantitative calculation method. Research conclusions ：( 1) In hub layout planning the paper analyzes six issues ： hub function，passenger system，cargo system，de - compile system，hub capability and cross - river channel. (2) From overall hub size，city coordination， operational effectiveness，operability， and sustainable development， the paper proposes comprehensive evaluation system，which has 30 specific key indicators. (3) Using subjective weight， entropy weight， and fuzzy evaluation method，the paper establishes a set of quantitative evaluation railway hub layout planning theory. ( 4 ) The research result can guide to hub layout planning in application programs and scheme comparison in particular railway project.
2016 Vol. 33 (2): 1-5 [Abstract] ( 2713 ) HTML (1 KB)  PDF  (581 KB)  ( 2421 )
       Survey and Design
6 Active Faults Integrated Survey and Evaluation Research in a Passenger Line
LIU Li - dong，KAN Jing - liang，ZHOU Xue – ming
Research purposes ： Active faults and ground fissures are developed in Beijing area of a pBsenger dedicated line，which bring about great geologic hazard for the design construction and operation safety of high - speed railway. Based on predecessors" research，this paper used comprehensive survey technology to probe the spatial distribution and the geological characteristics of the active faults and ground fissures along the railway，such as geophysical prosj^ecting， borehole surveying (trenching)，and the sample test and so on，and analyzed the technical feasibility and effectiveness. According to the design characteristic of railway engineering， evaluated and researched on the fault activity， ground fissure disasters and regional seismic safety， to provide the necessary survey data and the suggestion for the railway geological line selection，design，construction and prevention after construction. Research conclusions ：( 1) Engineering geophysical prosj^ecting as the main integrated survey technology in active fault exploration and evaluation is effective and reliable，able to reveal the geological characteristics and spatial distribution of the active faults and the ground fissures，and meet the needs of railway survey and design of pasenger dedicated line. (2) This paper proposed various fracture activity，ground fissure disaster and seismic safety evaluation of Beijing nortii activity fracture zone， the evaluation results is the basis of the furtiier design of pasenger dedicated line and the prevention and control after construction. (3) The research achievements have guiding significance for the similar railway survey and design, and have strong generalization value in the field of highway$ water conservancy and hydropower，and other civil.
2016 Vol. 33 (2): 6-10 [Abstract] ( 2827 ) HTML (1 KB)  PDF  (878 KB)  ( 2436 )
11 Selection of Ruling Grade for Xinjiang Jinyangguang Railway Special Line
HU Chun - lei
Research purposes ： Xinjiang Jinyangguang railway special line mainly undertakes iron ore transportation task. Project is located in the centre of Xinjiang and middle - low mountains of Tianshan Mountainswith big rising and falling topography，the relative height diference of more than 1 000 m. The most of planed tunnels for the railway will be the large tunnels one after another，so it is difficult to build this railway. Ruling grade for Xinjiang Jinyangguang railway special line is determined by analyzing the factors which influence the choice of ruling grade wit!i concrete conditions of Xinjiang Jinyangguang special railway to provide the reference for the similar worlds. Research conclusions ：( 1 ) By setting switch - back curve， the maximum ruling grade and the tunnels length are reduced. (2) The ruling grade is different，the project investment is obviously different. Combining the comprehensive analysis of project cost，Xinjiang Jinyangguang railway special line has been recommended to adopt tiie ruling grade ： up line 6 ‰ and down line 22 ‰. ( 3 ) The research result can be as the basis for the selection of ruling grade for the mountain railway with the complex topographical conditions.
2016 Vol. 33 (2): 11-15 [Abstract] ( 2656 ) HTML (1 KB)  PDF  (941 KB)  ( 2427 )
16 The Applicationof Spatial Data Railway Hydrology Design Hot!
CHEN Qiang，GOU Si2
Research purposes ： The spatial dataset and Geographic Information System ( GIS) has already been utilized in many different engineering and research fields， such as National Land Resources Monitor， Water Resources Management，Transportation System Plan and Municipal System Plan，and so on. Because the spatial dataset covers large swath of research area and it gives us much more convenient options for data interpretation than traditional maps，it is an ideal data sources for preliminary and feasible study in transportation engineering. However， for the feasibility study of a railway project，the traditional hydrology calculating procedure just uses topographic maps and surveyed data， which makes it more time consuming and inaccurate. So it is necessary to design a more efficient and accurate hydrology calculating approach. Research conclusions ：( 1) The new approach applying the various spatial data for hydrology calculating is very effective and feasible. (2) The approach was successfully applied in the drainage design for the feasibility study of the Mieso - DireDawa Railway project in Etliiopia， improving the efficiency and accuracy for hydrology design. ( 3 ) Rather than reviewing and interpretation traditional maps to extract the necessary geographic or runoff parameters，this new approach is more accurate than the traditional method，and is much easier to maintain those dataset through data base manipulation，makingit more applicable for thehydrology calculation of preliminary or feasibility study of railway project.
2016 Vol. 33 (2): 16-20 [Abstract] ( 2734 ) HTML (1 KB)  PDF  (879 KB)  ( 2449 )
       Geology and Subgrade
21 Research on the Mountain Disaster and Geological Alignment Fundamental of Sichuan - Tibet Railway Running Through N - S Mountain Area Hot!
ZHANG Guang - ze1，JIANG Liang - wen1，SONG Zhang1，WU Guang2
Research purposes： The Sichuan - Tibet Railway is the key construction project of the national 13th Five Year Plan. Now the Lhasa - Linzhi section of the railway is under construction，the Chengdu - Kangding section of the railway has finished the work of feasibility study，however，the survey and design work of the middle Kangding - Linzhi section of the railway is not yet formally launched. The N - S mountain area，which the Sichuan - Tibet Railway running through，is the bottleneck area for the Sichuan - Tibet Railway building in past decades，with the region engineering geological characteristics of high altitude， high gap in altitude， strong tectonization and developmental mountain disasters. In order to solve this problem， China Railway Eryuan Engineering Group Co. Ltd has been done the study work that study of the geological hazard characteristics of region of Chin - sha River，Lantsang River and Nujiang River and comprehensive geological alignment of the Sichuan - Tibet Railway. Based on the viewpoints of neotectonics， the paper researched the characteristic of deplanation plain， summarized the engineering geological issues of the N - S mountain area， and discussed the geological alignment fundamental of Sichuan - Tibet Railway running through the traverse mountain area. Research conclusions ：( 1) The N - S mountain area,with the characteristics of high altitude and high gap in altitude, develop three - level deplanation plains which averaging over 4 750 m, 4 100 m and 3 500 m above sea level, respectively. Among the deplanation plains are three - level slope transition area. The higher the altitude % the sooner the deplanation plain and slope transition area formed. (2) The deplanation plain，with the characteristics of level and steady, is the best region of the Sichuan - Tibet Railway alignment，and among the slope transition area from high altitude to low altitude，the stability of tiie slope transition area reduced out. (3 ) In the alignment of the Sichuan - Tibet Railway，take full advantage of the deplanation plain，short the length of the slope transition area，and line along the deep canyon is inappropriate. (4) The results can be applied to the railway and highway location in the alpine - gorge area.
2016 Vol. 33 (2): 21-24 [Abstract] ( 2898 ) HTML (1 KB)  PDF  (601 KB)  ( 2569 )
25 Determine the Reasonable Reinforcement Scheme for Karst and Soft Soil Foundation of High Fill of High Speed Railway
ZENG Yong - hong，DING Zhao - feng，LI Chu - gen
Research purposes ： In railway construction，when the subgrade base is karst and soft soil foundation，how to select reasonable reinforcement scheme for the foundation is a problem. The reinforcement scheme must suit for the karst and soft soil foundation at the same time，in order to avoid excessive settlement and karst collapse and ensure the safety of railway operation. In this article， the reasonable reinforcement scheme for karst and soft soil foundation at some station of high speed railway was determined by compositely considering technology，economic，safety and other factors. It can offer reference to the designer and similar project. Research conclusions ： ( 1 ) It is difficult to design reinforcement scheme for karst and soft soil foundation. The traditional reinforcement measures for the foundation are not applicable. It is need to adopt new technology. (2 ) Pile - net structure，pile raft structure and pile board structure can also meet the design requirements. The best solution can be determined by the scheme comparison. ( 3 ) The choice for the solution should avoid the blind pursuit of low cost，and mainly reflect the pursuit of 11 high cost11 values. (4 ) The research results can be used to determine the reinforcement scheme for karst and soft soil foundation of high fill of high speed railway.
2016 Vol. 33 (2): 25-27 [Abstract] ( 2728 ) HTML (1 KB)  PDF  (628 KB)  ( 2459 )
28 Research on the Design Method of the Large - scale Foam Light Soil for Soft Ground Treatments
WU Hai - gang，WANG Bao - jun，ZHENG Yong - hong，LU Ye – xu
Research purposes ： Soft soil is thick ( greater than 20 m )，and the nature is poor，part of the lane is arranged on the light rail bearing，part of the lane is arranged on the soft soil foundation， so there is the problem of uneven roadbed settlement. The paper adopts the method of comparative analysis，designs a kind of more economic and efficient processing solution，which used large - scale foam light soil. This solution mainly solves the three problems， such as uneven settlement， high project cost， and serious impacts of the common treatment measure on the rail pile foundation. Research conclusions：( 1) After fi^lly demonstrates the characteristics of light soil，the project experimentally treats the soft foundation of using the foam light soil witli the cement mixing pile， successfully solves the problem of the uneven settlement; (2) It reduces the engineering cost about 30% ; (3) It reduces the influence on light rail pile foundation， passes the safety assessment and obtains the experts and the owners approval; (4) It further improves and expands the use scope of the foam light soil which has a certain reference significance for this kind of project.
2016 Vol. 33 (2): 28-33 [Abstract] ( 2824 ) HTML (1 KB)  PDF  (905 KB)  ( 2551 )
34 Research on the Effect of Frame Pile with Vertical Pre - stressed Anchoring Cable in Landslide Control
GAO He - bin
Research purposes ： In the complex construction environment，for the shallow depth of the anti - sliding pile anchoring section in the landslide hazard， it is used to add the vertical pre - stressed anchoring cable to enhance the capacity of the pile. Based on the K 60 landslide of Songjian highway，this paper analyzed the characteristics of anti - sliding pile with vertical pre - stressed anchoring cable，and established the calculation and analysis model of its anti - slipping property，and combined numerical analysis method to research its effect on the slope stability. Research conclusions ：( 1) Through numerical analysis and two years displacement monitoring，it was proved that the effect of the frame pile with vertical pre - stressed anchoring cable in the K60 landslide control engineering was well. For adding vertical pre - stressed anchor cable in the anti - sliding pile，it not only increased the bending capacity of the pile，but also enhanced the anti - slip ability of the pile. Especially，it had a significant advantage for the anti - sliding pile of the more shallow embedded rock. (3) Compared with the traditional anti - sliding pile， adding the vertical pre - stressed anchor cable in anti - sliding pile saved the material，reduced the time of landslide control，and also reduced the risk of safety accident of slope. (4) The research results can provide references for the railway or highway landslide engineering in emergency rescue.
2016 Vol. 33 (2): 34-36 [Abstract] ( 2801 ) HTML (1 KB)  PDF  (454 KB)  ( 2539 )
       Bridge Engineering
37 Bridge Design near Existing High - speed Railway in Shijiazhuang - Jinan Passenger Dedicated Line
SUN Zong - lei
Research purposes ： High - speed railway has very high demand in settlements，since new buildings near the existing high - speed railway will produce additional stress on the surrounding soil，thus cause settlement of high speed railway due to some factors such as pit excavation，pumping，precipitation，load increase and so on. Taking the new Shijiazhuang - Jinan Passenger Dedicated Line as the background，this line parallels Beijing - Shanghai High - speed Railway in a long distance of 99. 4 kilometers， the linking - up road in Jinan West Station under - pases Beijing - Shanghai High - speed Railway，while the tie line in Wulitang crossed Qingdao - Jinan Passenger Dedicated Line witli a small angle. In order to ensure the operation safety of the existing high - speed railway，Shijiazhuang - Jinan Passenger Dedicated Line carried out bridge design from spacing selection near high - speed railway，under - passing high - speed railway bridges analysis，and automatic monitoring. Research conclusions ：( 1) The parallel line spacing with Beijing - Shanghai High - speed Railway was confirmed based on certain specific research. ( 2 ) By under - passing the Beijing - Shanghai High - speed Railway，the deformation influence of the bridge pile load attachments on the adjacent high - speed railway was reduced due to the rationale base form. (3) Shijiazhuang - Jinan Passenger Dedicated Line crossed Qingdao - Jinan Passenger Dedicated Line in a small angle through the adoption of frame piers and continuous beam pusher， reducing the interference with existing high - speed operation in the constructing and maintaining process. (4)This is the first realization of high - speed long - distance real - time automatic monitoring, which escorts the smooth implementation of the project. ( 5 )This research conclusion can provide reference for the engineering near the high speed railway.
2016 Vol. 33 (2): 37-42 [Abstract] ( 2744 ) HTML (1 KB)  PDF  (1583 KB)  ( 2487 )
43 Design and Analysis of Railway T - frame Cable - stayed Bridge
LI Tian – en
Research purposes ： The low tower cable - stayed bridge is between PC continuous beam bridge and PC cable - stayed bridges，which has good technical and economical index. But this kind of bridge is rarely applied in railway. This paper took a (136 A 136) m railway low tower cable - stayed bridge as an example， introduced the design characteristics，and drew some reference conclusions through analysis of the design. Research conclusions ：( 1 ) The stress characteristic of low tower cable - stayed bridge is quite the same as beam bridge. Suspension cable is equivalent to the external prestressed cable of main girder. Bridge tower is equal to the steering equipment of external prestressed cable. The stress of bridge is clear and the cable is efficient. (2) Height of the tower has little effect on stiffness，but contributed significantly to the main beams，and cable has an obvious effect for girder main tensile stress. (3) The structure of the main girder is large，the stress amplitude of cable is small，and the fatigue resistance is improved obviously compared with the full cable - stayed bridge. (4) For cable - stayed bridge，the vertical load sharing rate of cables is influenced by human factors，so low tower cable - stayed bridge cannot be defined by cable vertical load share ratio. (5 ) Under some special conditions， low tower cable - stayed bridge has great competitive advantage in the field of railway construction.
2016 Vol. 33 (2): 43-47 [Abstract] ( 2715 ) HTML (1 KB)  PDF  (729 KB)  ( 2462 )
48 Seismic Response Analysis of Deep - water Rectangular Hollow Pier
SHEN Wei，YANG Wei – bo
Research purposes: There are many hydropower projects in Southwest China， where has frequent earthquake，sometimes line projects such as railway， highway cross reservoir. Based on a highway bridge across reservoir in Wenchuan area，this paper made a research on vibration response rules of the deep rectangular hollow bridge pier under earthquake action and its impact on the stability of the pier，improved the understanding of deep rectangular hollowbridge pier seismic response. Research conclusions:(1) Water reduces the piers natural vibration frequency，and increases pier-tops displacement and acceleration. At the same time，the internal water to pier X low - order modal frequency reduces larger， and the external water to piers high - order modal frequency reduces notable. (2 ) The internal and external water to affect the pier - tops displacement and acceleration is equal. But the dynamic response of external water to the piers internal force and stress is bigger than that of internal water. ( 3 ) When there is water，diaphragm can reduce the natural vibration frequency of pier，and has little influence of pier – top X displacement and acceleration; however it has deep effect on piers internal force and stress. And setting diaphragm，piers internal force and stress will mutate at the place of setting diaphragm. This will easily form the concentration of stress. (4) It has important significance and construction value to the optimization of deep - water hollow piers astigmatic measures.
2016 Vol. 33 (2): 48-53 [Abstract] ( 2714 ) HTML (1 KB)  PDF  (1703 KB)  ( 2433 )
       Tunnel Engineering
54 Research on the Method of Surrounding Rock Classification in Large Cross - section Tunnel for Passenger Dedicated Railway Line Hot!
WANG Chun – lei
Research purposes ： It is the indispensable basic data to the surrounding rock classification after accurate judgment for the tunnel design and construction. A perfect and in accordance with the engineering practice of surrounding rock classification method is one of the major problems that must be studied in the construction of railway tunnel. Aiming at the existing problems in surrounding rock classification method of railway tunnel， based on the classification of surrounding rock verified in railway passenger dedicated line in recent years， a set of scientific and reasonable and quick and practical method of multi - factor comprehensive index of the surrounding rock classification was studied，which could provide basis for survey and design and disaster prevention of railway tunnel in passenger dedicated line. Research conclusions ：( 1) The index system of tunnel surrounding rock classification of railway passenger dedicated line was put forward in this paper. (2)The more suitable method for surrounding rock classification of railway tunnel is BQ method，but this method should be revised when the tunnel excavation with larger area. (3 ) The paper also put forward correction suggestions based on the stability of surrounding rock， and the BQ method was improved. (4) At last，the method of multi - factor comprehensive index of the surrounding rock classification was put forward，which could realize result of tunnel surrounding rock classification quickly or effectively in the railway passenger dedicated line.
2016 Vol. 33 (2): 54-58 [Abstract] ( 3726 ) HTML (1 KB)  PDF  (551 KB)  ( 2513 )
59 Research on the Rockfall Protection Structure for Junction Area between Bridge and Tunnel in the Changsha - Kunming Railway Line Hot!
LUO Ren-li，LI Ya-jun
Research purposes ： In the later construction period of the Changslia - Kunming Railway Line，some working points need rockfall protection structures which are located at junction area between bridge and tunnel，the construction disturbance is serious，and the schedule is very tight. According to these factors，through analysis and comparison of the open - cut tunnel scheme，the transverse frame scheme and the longitudinal frame scheme from applicable condition and structure internal force，the better design schemes are confirmed for different conditions. Research conclusions：( 1 ) When design the rockfall protection structure， the field condition and the construction disturbance should be fully considered. (2) When there is mound plate trolley，the open - cut tunnel scheme is the first priority. (3) Because of the construction disturbance and the bigger internal force，transverse frame scheme should not be adopted in the later construction period. (4) The longitudinal frame scheme can avoid the construction disturbance， if the precast and hoisting condition is allowed，T beam is better to be used as the cross beam，otherwise，hollow slab beam is better. (5 ) This research result could provide a reference for type selection of rockfall protection structure in similar situation.
2016 Vol. 33 (2): 59-63 [Abstract] ( 2820 ) HTML (1 KB)  PDF  (714 KB)  ( 2509 )
64 Research on the Advanced Measures for Large Span Tunnel in Dense Dry Fine Sand Stratum
WANG Li - qing
Research purposes ： In the construction process of Shangbai tunnel in Datong - Xi an Passenger Dedicated Line，tunnel face presents dense dry fine sand stratum， lenticular， and disturbance produced sand leakage and sand gushing，unable to formthe desired contour，so there is a higher risk. The main performance is that the cohesion is low， the disturbance of a short time accumulates piles，and can not form the arch effect; high sensitivity，damage is often instantaneous，sudden，prone to cavities， which generally form cavity from the soil sand boundaries. In view of the existing problems，the measures need to be studied to ensure the tunnel face stability and construction safety by means of what measures to reinforce the dense dry fine sand stratum，to form the arch effect and tunnel face stability and control of subsidence and deformation. Research conclusions ：( 1) Make full use of high pressure jet grouting to mix fine sand with cement，recombine the rock mass structure， and form cyclic concretion body to solve the construction problems. (2) Realizing the mechanized construction of the large section of the weak stratum is the guarantee of realizing the basic requirements of the 11 six in one modem construction management. ( 3 ) It remove the pipe - shed studio， which has simple process， less interference, easy operation and high efficiency. (4) Horizontal rotary jet grouting pile in advance reinforcement can protect the surrounding rock and form cyclic concretion body around the scheduled tunnel, which has the advantages of large stiffness $ high strength and strong controllability in the construction. Preliminary arch after excavation can play a role, to ensure the safety of construction and control the high risk tunnel construction risk, which is innovation and breakthrough in the technical field of construction. (5 ) As a new technology in the consolidation of the pipe shed, the smaller diameter of the pile adding pipe shed makes up for the construction defects of the consolidation, inhibits the settlement and deformation, and has low investment$ good stress$ safety in construction and other advantages$ which can be further promoted and applied.
2016 Vol. 33 (2): 64-69 [Abstract] ( 2702 ) HTML (1 KB)  PDF  (1436 KB)  ( 2521 )
       Orignal Article
70 Research on the Control of Comfort Degree in Vibration Caused by Human in Large - span Floor of High - speed Rail Station Hot!
SUN Jian – long
Research purposes: For the large span floor of high speed railway station，through the establishment of finite element model，the vibration properties of the large - span floors in the structure were studied. The theory of structural vibration control was used and multiple tuned mass dampers (MTMD ) was selected and used to control the comfort degree and the vibration of the structure in the crowd loads. Research conclusions:( 1 ) The three - dimensional structure analysis model establislied by general finite element analysis software platform can analyze dynamic response of floor structure under various crowd load conditions before and after damping in the whole construct course，and compare the structures before and after the vibration in terms of peak acceleration index. (2) The MTMD scheme can effectively reduce the vibration acceleration peak of floor in the crowd load，which can make the structure meet requirements of degree of comfort in vibration caused by human and have good effect to control the vibration. (3) The research results can provide a theoretical reference and technical support of vibration control and comfort design of similar large span floor
2016 Vol. 33 (2): 70-74 [Abstract] ( 2678 ) HTML (1 KB)  PDF  (1209 KB)  ( 2493 )
       Electrification Engrinnering
75 Research on the Configuration Scheme of Signal Equipment for Foreign Object Invasion Monitoring System in Multi - line Adjacent Sections
WANG Man - yi
Research purposes: With the train operation speed improved steadily，the impact of the disaster on the train operation is more obvious，the judgment time and reaction time for the driver while disaster comes to is also very short， so it is hard to avoid the impact of disasters by controlling the train manually. The natural disaster monitoring system must be set up to reduce the traffic accidents caused by natural disasters factors，and to ensure the safety of passengers’ lives and property. The foreign object invasion monitoring of the road bridge which crosses over the railway is one of the important components of tliis system. Based on the design example of typical foreign object invasion monitoring for bridge over multi - line adjacent area， this paper gave a specific design scheme， analyzed and researched to determine the structure，monitoring functions and design of the system in detail which can provide reference for design，construction， alteration and operation of similar engineering. Research conclusions： (1) In order to ensure the safety of running，when designing a foreign object invasion monitoring system of the road bridge which crosses over multi - line railway，the fail - safe principle should be obeyed besides the requirements from the code，and the equipment control should be prior made. (2) A thorough investigation is required before designing the system and the boundary of the centralized interlocking area should be decided reasonably according to the dispatch area，and the foreign object invasion monitoring networks which belong to different divisions should be designed separately on the consideration of easy operation and maintenance. ( 3 ) It is important to draw out a scheme that is optimized based on the specific interface used through technical communication with the suppliers. (4) The research result has a strong reference and guidance for similar project，and can be applied to the engineering design and operation of the railway natural disaster monitoring system.
2016 Vol. 33 (2): 75-79 [Abstract] ( 2756 ) HTML (1 KB)  PDF  (595 KB)  ( 2433 )
       Urban Rail Construction
80 Research on the Measurement and Adaptability of Intercity Railway Network Scale of Urban Agglomeration
HUANG Chao, LV Ying，LIU Su
Research purposes ： Intercity railway network scale measurement is key content of the network planning in urban agglomeration， reasonable network scale can prevent blindness in planning and construction. The cooperative coupling relationship between social economy and the network scale is analyzed and a calculation model is constructed based on a variety of factors. From requirements of planning objectives and structural performance of network two aspects，adaptability of intercity railway network scale is studied. Take Guanzhong urban agglomeration as an example to verify scientificalness and rationality of calculation model. These are valuable for intercity railway network planning in different urban agglomerations. Research conclusions ：( 1 ) The level of socio - economic development of urban agglomeration is a key element that affects intercity railway network scale ; (2 ) The coupling degree between levels of socio - economic development and the size of intercity railway network is related to the development level of urban agglomeration; ( 3 ) From the perspective of network configuration，intercity railway network scale mainly determined by the size of line between key demand nodes; It is necessary to consider the investment constraint and passenger demand restraint in the measurement of intercity railway network scale; ( 5 ) Rationality of network scale embodies in the quantity and quality two levels， balanced coefficient of supply and demand and level equilibrium coefficient are introduced to evaluate; (6 ) The research results can provide theoretical support and decision - making reference for the intercity railway network planning of urban agglomeration , and improve the railway network planning theory system.
2016 Vol. 33 (2): 80-84 [Abstract] ( 2713 ) HTML (1 KB)  PDF  (527 KB)  ( 2430 )
85 Determination of Train Marslialling of Jinan Rapid Rail Transit Line 1
WANG Guo - fu，YANG Pei - sheng，LIU Hai - dong
Research purposes: Train is the direct carrier of passengers in urban rail transit，and train marshaling form involves the urban planning， passenger flow，train operation， line network resource sharing， and so on. From the perspectives of urban rail transit line characteristics，traffic volume forecasting， vehicle capacity， transport capacity matching，line network resource sharing，dynamic ratio of motor cars and trailers and economy，the optimal Jinan rail R1 line train marshalling was determined through the break - even analysis. Research conclusions:(1) Considering various factors，4-4-6 mar sliding is recommended for Jinan rail transit R1 in the early，the near future and the far future stages. The ratio of motor cars and trailers is 3 ： 1 in the early and the near future，4 : 2 in the far future. (2) Passenger flow prediction is the main factor affecting vehicle type and train marshalling selection，depending on urban planning and development. (3) According to the breakeven analysis，train expansion after 10 years of operation is a more economical solution. (4 ) The results have been applied on the design of Jinan rail transit R1，and can provide a reference for the similar projects.
2016 Vol. 33 (2): 85-90 [Abstract] ( 2829 ) HTML (1 KB)  PDF  (730 KB)  ( 2497 )
91 Discussion and Analysis of the Metro Environment Control System Using Vehicle Regenerative Braking Energy in Cold Region Hot!
HAN Ping，ZHANG Xi - hai，WU Shi – qising
Research purposes: The cold insulation of metro system in winter should be focused. The vehicle regenerative braking energy is a measure of energy saving operation of the subway system. In this paper， the vehicle regenerative braking energy recovery is analyzed from the point of view^ of the environment control system. The metro environment control system in cold region using vehicle regenerative braking energy are analyzed and discussed. Research conclusions:( 1 ) Train regenerative braking energy recovery mode is recommended ： regenerative electric energy is a part of the traction network，the other is absorbed by vehicle in the traction condition， the remaining renewable power can be set up through the vehicle auxiliary inverter into alternating current，the vehicles auxiliary power equipment used or car mounted device in the form of heat emitted into the subway tunnel. (2 ) This regenerative braking energy recovery mode on the one hand can realize that the electric energy is absorbed by the counterparts，reducing traction braking energy consumption. ( 3 ) On the other hand，the electric energy can be excluded from the subway train car，which can be emited into the subway tunnel，in summer the transition season can be ruled out by the column car， no additional energy consumption. ( 4) The research conclusion can provide a reference for the vehicle regenerative braking energy recovery in the cold area.
2016 Vol. 33 (2): 91-95 [Abstract] ( 2717 ) HTML (1 KB)  PDF  (1334 KB)  ( 2504 )
96 The Application of the Comprehensive Evaluation System for Comparison and Selection of the Plans of Fuzhou - Xiamen Dedicated Passenger Line
LIU Qing – hua
Research purposes ： The comparison and selection of the plans is a systems engineeringwith multij^le objectives， multiple criteria and multiple factors in railways engineering design. From the point of conventional qualitative analysis to compare and select， each plan has advantages and disadvantages. Especially when these plans have no major difference，it is difficult to select the optimal one scientifically. Through this research，a comprehensive evaluation index system for reasonable comparison and selection of the plans was to be established. Research conclusions ：( 1) Fit to evaluate the project with multiple angels and complex factors，factor analysis method has been widely applied for the fields such as sociology， medicine and economics， thus factor analysis method was recommended in this evaluation. (2) According to the characteristics of Fuzhou - Xiamen Dedicated Passenger Line and the principle of comparison and selection of the plans，the comprehensive evaluation index system of the plans of Fuzhou -Xiamen Dedicated Passenger Line was established by factor analysis method. (3) Taking Putian section of Fuzhou - Xiamen Dedicated Passenger Line for example，we first did conventional qualitative analysis on plan of Putian section， and then bring each plan into the comprehensive evaluation index system for analyzing and evaluating，and selected the optimal plan according to the results of evaluation finally. (4) The idea and the comprehensive evaluation index system on the comparison and selection of line plans in this study have reference significance to the comparison and selection of similar projects.
2016 Vol. 33 (2): 96-101 [Abstract] ( 2767 ) HTML (1 KB)  PDF  (777 KB)  ( 2439 )
102 Research on the Laying Mode of Urban Mass Transit
ZHAO Qiang
Research purposes: Taking laying mode of Wuhan urban rail transit airport line as an example，the paper focuses on applicable scope，impact on the environment and urban land usage，engineering cost and operation cost，to achieve the reasonable choice for the route laying mode，and provide useful technical support for the route laying mode of urban rail transit. Research conclusions:(1) Selecting the appropriate laying mode of urban mass transit is a work which should be done in accordance with the requirements of overall urban planning， combining land using nature and the surround environment. (2) There are differences in construction cost and have different effects on the surrounding environment for the ground line，the elevated line and the underground line， so determining the route laying mode of urban rail transit needs an objective analysis and assessment，rather than experience or qualitative analysis. (3) In consideration of the environmental assessment，construction conditions，construction and operation cost，and other more aspect，the elevated line of laying mode is used in Wuhan rail transit airport line. (4) The research conclusion will provide useful technical support for other project.
2016 Vol. 33 (2): 102-105 [Abstract] ( 2731 ) HTML (1 KB)  PDF  (726 KB)  ( 2528 )
106 Design and Study of Sharp Radius and Cast - in - situ Simply - supported Curved Beam on Intercity Railway
ZHOU Ji，YAN Ding -guo，TIAN Fang
Research purposes： Take the key project of Wuhan - Xiaogan Intercity Railway focused on the Fuhe river super large bridge as an example，the detailed design and research were made and done on the structural form， load bearing characteristics，overturning stability and engineering quantity of 32 m double – track ballastless track cast - in - situ simply - supported curved beam located in the range of curve radius 500 m. Through the comparison and analysis of the plane and space，the reliability of the analysis method of 32 m simply - supported curved beam is verified，and some conclusions for the design of curved beam are drawn. Research conclusions： (1)The results shows that，all the indexes of 32 m simply - supported curved beam can meet the specification requirements. The structure is safe and reliable. (2) The simply - supported curved beam is not safe to use straight beam model，the curved beam model should be used to calculate and the strength safety factor should be considered slightly to stay rich. (3) The bending - torsion coupling causes the inner side force and outer side force of simply - supported curved beam to be unequal，the outer side compressive stress of box girder bottom slab is smaller and there is no great difference in the stress characteristics between the curved beam and the straight beam. (4) The bearing arrangement does not affect the internal force distribution of simply - supported curved beam，the beamhas a tendency to move to the outside in the transverse direction. (5 ) Simply - supported curved beam web site can be consistent with the adjacent straight beam size，the web size will not increase. (6) The curved beam length is longer and the secondary dead load is larger. The engineering quantity of the beam is also slightly more than the straight beam，but the increment is in the reasonable scope，the project cost is economical. (7) The beam type can be widely used in the same type of intercity railway，the research methods and conclusions can provide reference for other simply - supported curved beam design.
2016 Vol. 33 (2): 106-110 [Abstract] ( 2753 ) HTML (1 KB)  PDF  (712 KB)  ( 2505 )
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