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1999 Vol. 16, No. 1
Published: 1999-01-15
1
SPEED UP STEPS FOR CONSTRUCTING QING-ZANG RAILWAY TO PROMOTE DEVELOPMENT OF RAILWAY NETWORK IN XIZANG AU-TONOMOUS REGION
FAN Guangming
In 21st Century,due to the sustainable development of national economy? the requirement on railway transportation will be increased continuously.From the viewpoint of distribution of railway networks in whole country,the Xizang Autonomous Region is a blank area. The paper expounds the necessity and the urgency for constructing the Ge′crmu-Lasa Section of Qing-Zang Railway based on the following aspects;the superiority of resources in Xizang Region, its meaning concerned with econ?omy , railway network and national defence，the route selection and comparisons between the railways towards Xizang,etc, so as to quicken the steps for constructing railway network in Xizang Region,concluding the history of non-railway in Xizang Region and providing a base for economic evolution of Xizang Region in 21st Century.
1999 Vol. 16 (1): 1-5 [
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6
THINKING AND SUGGESTION FOR CONSTRUCTIGN LAN-YU RAIL?WAY-THE SECOND TRUNK PASSAGE BETWEEN SOUTHWEST AND NORTHWEST OF CHINA
XIONG Xingde, WANG Baoshan
The Lan-Yu Railway will be a rapid and convenient trunk passage connecting the southwest and northwest regions. The construction of Lan Yu Railway has very important meanings as follow?ing； to improve the structure of railway networks in China develop resources along railway line, fun-damentally transfer poor to rich situation for people in the region promote cooperative development of economy within both Yangtze River and Huanghe River basins, realize national strategy towards West Region and its sustainable development, etc. The paper analyzes the situation of south-north railway trunk passage in China and the resources along the railway line. The authors propose also their opin?ion and suggestion for constructing the Lan-Yu Railway.
1999 Vol. 16 (1): 6-8 [
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2473
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9
A NEW SURVEYING METHOD ON EXISTING RAILWAY FOR IN-CREASING LEVELLING ACCURACY FROM 1/2 000 TO 1/10000
LIU Zhiyi,SUN Jizhong
The paper introduces a new surveying method in which the different surveying station on an existing railway line during the survey procedure are connected as a complete photoelectric guide line， so as to increase the overall accuracy. By using this new surveying method.the levelling accuracy on existing railway line may be increased from 1/2 000 to 1/10 000, It play an important role of raising qualitv and eliminating mistakes for survey and design on existing railway lines.
1999 Vol. 16 (1): 9-12 [
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2470
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13
FLEXIBLE APPLICATIONS OF DESIGN CODE AT GANZHOU- LONGCHUAN SECTION OF JING-JIU RAILWAY
QIN Yongping
Combined with the particular practical situation at the Ganzhou-Longchuan Sec 1 ion of the jing-Jiu Railway, the paper introduces two practical examples which created grand benefits by flexibly applying the design code. The two examples are： (1)selcction of the minimum curve radius used in the Ganzhou-Longchuan Station, and(2)selection of the gradient of station yard for Xiaojiang Stadon. These examples illustrate the meaning of flexible application of the design code.
1999 Vol. 16 (1): 13-16 [
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2467
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17
EFFECTS OF LATERAL DISPLACEMENT ON ELASTO-PLASTIC STRESS FIELD IN RAIL HEAD
ZHANG Yan,LIU Kunfang,CAO Limin,YU Lei,KONG Xiang'an,JIN Xuesong,SHIN Taihe
Lateral displacement is one of the most important case parameters in research of wheel/rail interrelation. The variation of lateral displacement affects extremely the geometry and mechanics parameters in contact zone. The paper deals with effects of lateral displacement on elasto-plastic stress field in rail head. The research shows, lateral replacement influences greatly the yield zone and the distribution of stress status in rail head.
1999 Vol. 16 (1): 17-20 [
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2514
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21
JOINTLESS RAIL ON BRIDGE IN RALLWAY OF WEST EUROPE
ZHAO Yucheng
This paper is a continuous part of the thesis “Integral Continuity of Railway in West Europe” written by the author，which was issued in No. 4 of the“Journal of the Railway Engineering Society”in 1998. In this paper，the following articles are introduced；the influence factors of the longi?tudinal force on jointless rail on bridge in railways of West Europe and its calculating method, the maximum span of bridge having jointless rail on bridge without expansion joints,measures for reduc?ing the additional forces, track structure, new concept on expansion joints,etc. As the design princi?ples for jointless rail on bridge by UIC are introduced,the author points out especially the important meanings concerncd with the ultimate value of additional forces (including tension and compression) .the ultimate value of the relative displacement of rail on bridge beams.the maximum span of simply supported bcam without expansion joints，etc.
1999 Vol. 16 (1): 21-28 [
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2502
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29
CONSTRUCTION TECHNIQUE OF FOUNDATIONS UNDER EXPOSED ROCK IN DEEP WATER
ZHU Chi
Combined with the construction of the most complex grand bridge in the Heng-Nan Rail-way, the construction technique of the bored hole pile under hard exposed rock at the bottom of river in deep water is introduced. Through the stress analysis and the simplified calculation (or cofferdam’s structure in deep water, a highly applicable single wall assembly steel cofferdam was designed, and the objects of safety, high efficiency ,economy, easy to be operated, etc，during construction had been obtained.
1999 Vol. 16 (1): 29-34 [
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2498
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35
PRINCIPLE AND METHOD OF QUALITY CONTROL FOR MANUFAC-TURING STRAND CABLE OF CABLE-STAYED BRIDGES
LI Rongqing
The paper introduces the procedure of the process technology for manufacturing the strand cable of cable-stayed bridges. The principle and method of quality control at its different manufactur-ing stages are described in detail. The relative problems which should be taken into attention in the procedure of manufacture and its treatment are also proposed.
1999 Vol. 16 (1): 35-39 [
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2637
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40
CONSTRUCTION TECHNIQUE OF ASSEMBLY RIGID FRAME ARCH BY LATERAL SLIDING OF LONGITUDINAL SUPPORT
SUN Zhangzhi
There was no example to proceed the assembly of rigid frame archs by using the method of lateral sliding of the long-span longintudinal support in deep water. During the construction of a major bridge on the Anli Reservoir,this method was applied successfully to complete the assembly of 4 rigid frame arches with 45m span each. The construction works proceeded with rapid speed thigh quality and low cost. The paper introduces this construction method emphatically.
1999 Vol. 16 (1): 40-43 [
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44
CONSTRUCTION PRACTICE OF MIHUALING TUNNEL EXIT WITH CHINESE TUNNELING METHOD
LUO Qiung
The Chinese Tunneling Method has summarized the experiences of tunnel construction in China for many years. In this paper.the constuction experience of Mihualing tunnel exit with Chinese Tunneling Method is introduced,including the establishment and implement of the following six important working lines,i.e.cxcavation.loading-conveying transport .anchor bolt-spray support ,concrete lining.waterproof and drainage.vetilation and chvironmental protection. The corresponding complete machinery set and construction management are also proposed.
1999 Vol. 16 (1): 44-49 [
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50
WORKSITE MONITOR AND ITS ANALYSIS FOR LOWERING TEMPER?ATURE IN PARALLEL HEADING DURING CONSTRUCTION OF QIN- LING EXTRA-LONG TUNNEL
GOU Biao,ZHANG Junping
The paper expounds the measures for lowering the temperature in tunnel during the con?struction of the Qinling extra-long tunnel. The experience has been provided to solve the problem of lowering of temperature for constructing long tunnels in China hereafter.
1999 Vol. 16 (1): 50-53 [
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54
RESEARCH ON TUNNEL CONTROL BY LAYOUT OF GUIDE LINE ADDED WITH SPINNING TOP RAKE
HE Guohong
Based on the theory of leveling error，the calculating formulas for the increment of lateral penetrating accuracy by the layout of ground and underground single guide lines added with spinning top rakes are derived strictly. The simplified and practical calculating formulas which may be solved on computer are also obtained. Applying these formulas, the optimal layout of the spinning top rakes and its strict evaluation results on lateral penetration may be obtained easyly. It is valuable as refer?ence for the design and calculation of tunnel control by the layout of ground and underground guide lines added with the spinning top rakes.
1999 Vol. 16 (1): 54-60 [
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2463
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61
STUDY ON EVALUATION OF ROCKMASS CORROSION IN SUBGRADE SLOPE
XU Zemin,YANG Lizhong
Rockmass corrosion is the base deformation and failure of the subgrade slope. The rockmass corrosion process of some subgrade slope was evaluated quantitatively by means of mass transfer mod?eling. The results indicated that the corrosion amount and corrosion depth per year is 40 t and 2.7mm respectively.
1999 Vol. 16 (1): 61-66 [
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2551
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67
ANALYSIS ON DEVELOPMENT OF LANDFORM FOR LOSESS LAND?SLIDE IN NORTHERN REGION OF SHANXI PROVINCE
SUN Bo
The developing procedures of landform for the loess landslide in northern region of Shanxi Province are devided as three stages ,i. e. the initial stage of deformation,the middle stage of deforma?tion and the final stage of deformation.For diffirent developing stages ,the paper analyzes the stability of loess mass , its dynamic mechanism and the reason of its formation. And the corresponding principles of engineering installations and the countermeasures for its treatment are also proposed.
1999 Vol. 16 (1): 67-71 [
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2521
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72
MECHANISM AND PRACTICE ON REINFORCING LOOSE BED LANDS、 LIDE WITH PRESTRESSED ANCHORING ROPE
JIANG Zhongxin
Based on the test research and engineering practices on reinforcing the loose bed landslide with prestressed anchoring rope (anchor cable) ,the problems concerned with the stress response ,anchoring force ,exhaustion of prestress force and the group of anchoring ropes are explored.The practi?cal engineering applications of reinforcing the landslide and the slope in rock fracture zone , slump-mass and sandy gravel are also expounded in detail in this paper.
(According to research and practice,the following mechanism on reinforcing loose bed landslide and slope are expounded. The regularity of transmission and response of stress is similar in loose bed and in rock bed. The anchoring force in anchoring section loose bed may be strong enough through ex?panding the aperture and grouting in twice times. Exhaustion of pres tress force with compression creep of loose bed is limited and can be compensated. Effect of a group of anchoring rope is regular,as the in?terval of the rope is suitable.
Under some conditions,the engineering of reinforcing landslide and slope in rock fracture zone,slump- mass and sandy gravel is more cheap,high speed and safe with prestressed anchoring rope than anti?slide pile. The Laoyayan landslide of the Baoji-Chengdu railway is a example in which the reinforced loose bed was applied atone with prestressed anchoring rope. Using prestressed anchoring rope for re?inforcing the excavation wall o{ sandy gravel in building of Bank of China is the first time in Chengdu city. The Badu landslide of Nanning-Kunming railway in slump-mass, a main reinforcing engineering in which the prestressed anchoring rope was applied,is a most big controlled landslide in railways.
1999 Vol. 16 (1): 72-77 [
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78
DIVISION ON THE MOUNTAIN SLOP DEBRIS FLOW RISKS ALONG RAILWAY
XIE Xiuqi,WEI Hong,SHI Shengguo
The mountain slope debris flow(MSDF) was a kind of embryonic form debris flow which oc?curred on the stiff slope of the mountain railways. The MSDF hazards were occurred frequently on the Chengdu-Kunming Railway. On the basis of the formation cause of the mountain slop debris paper provides a judgement model for divison of the MSDF risk,and has divided the hazard degrees of the MSDF along Chengdu-Kunming railway into 10 regions.
1999 Vol. 16 (1): 78-84 [
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2510
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85
STUDY ON MATHEMATIC MODEL FOR ASSEMBLY CALCULATION OF CATENARY SUPPORTING
YUAN Yusen
The assembly calculation of the catenary supporting is important and difficult in the catenary profession. In order to assemble the catenary supporting in site once for all,the mechanics and mathe?matics analyses are made on the structure of the different parts of the catenary supporting with the full-compensated chain suspension. It provides a basis for establishing a mathematic model for the as?sembly calculation of the catenary supporting.
1999 Vol. 16 (1): 85-91 [
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2515
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92
THEORY OF RADIO WAVE PROPAGATION IN RAILWAY TUNNEL
ZHENG Cuoshen,ZHANG Wenmei,ZHANG Yueping,SHENG Jianheng
Research on radio wave propagation in tunnels has important application for mobile and personal communication. This paper first briefly reviews radio wave propagation in empty tunnels, and then concentrates on characterizing radio wave propagation in tunnels loaded with trains. For this purpose, an oversized imperfect periodically loaded rectangular waveguide is proposed, and surface impedance approximation is adopted to formulate the problem. The theoretical results show that HEM11 and TSMq.mo modes can propagate. Meanwhile, why TSMq.mo modes can not exist is also proved.The close form propagation constants for those import TSMq.mo modes are obtained. The numerical results for the propagation attenuation of the dominant TSM1.10 are presented. The influence of passengers on propagation is discussed.
1999 Vol. 16 (1): 92-97 [
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98
PRINCIPLE FOR OVERSEAS INTERNATLONAL ENGINEERING PRO?JECTS
WANG Liping
From June, 1997 to June, 1998,in a bid 10 successfully execute the 560 Million-Dollar-priced Contract co-signed by the Federal Ministry of Transport of Nigeria and CCECC Group for rehabiltating he 3 288 km-long Nigerian Rail way-track, the Ministry of Railways made full use of Chinese Rail- way Group’s advantages.strictly followed the international practice to undertake engineering projects, and organized the forces from eight Engineering Construction Bureaus and Construction Units under the authority of Railway Bureaus to participate in the Mass Campaign to re-construct Nigerian Rail?way Line. As for this whole engineering project ,no matter tracing project information,signing the con?tract agreement or controlling internal sub-contractcd constructions. it has been observing internation?al standards to the greatest extent, therefore gaining a better reputation in the World.
The author joined such Mass Construction Campaign and worked as a managing director. He wrote this thesis to analyze the characteristics of the contracting and management of international projects, summarize the successful experience from the execution of Nigerian Railway Project and other engi?neering work abroad completed by domestic corporations. This thesis also fully and accurately discuss?es and proves the areas available for future contraction by our railway engineering enterprises;main construction projects worthy of tendering；the way to uncoil main channels and collect information；as well as the guiding principle for overseas project contracting, operation policies and management on site ?etc. The aim is to enable more construction enterprises inside our railway system to grasp main points,avoid detours,and share more portions of the world construction market when going outside to exploit overseas markets.
1999 Vol. 16 (1): 98-102 [
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THE DEVELOPMENT OF INTERNATIONAL ENGINEERING MANAGE?MENT AND OUR STRATEGIES
YANG Qibing
The treatise describes the figure of Singapore construction industry. Its essence is to analyze main-contractors’ operational means in the international construction market, to compare the differ?ences on project management between arid overseas ,and to expatiate on contract documents and price. Finally it sunimarizes the developmental trend of international construction engineering. and therefore proposes the strategies for Chinese construction enterprises.
1999 Vol. 16 (1): 103-110 [
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111
MANUAL ADJUSTMENT OF COMPUTER’S RESULTS FOR CAST-IN- PLACE REINFORCED CONCRETE PLATES
CHE Yanping
Based on the design experiences on the cast-in-place reinforced concrete plate,how to adjust the computer's results concerned with the demensions of the plate,the fitting ratio of its reinforcing bars,the deformation caused by the over-width of its crack,etc,arc discussed. The corresponding de?sign suggestions are proposed,which may be provided as reference for the structural design.
1999 Vol. 16 (1): 111-113 [
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2535
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114
APPLICATION OF GANGUE AS BASE COURSE MATERIAL OF PAVE?MENT FOR HIGHWAYS
HE Shangjun
In recent years,as the concept of environment protection is growing stronger day by day,the people pay widely great attention on the application of different kinds of industry waste residues, a?mong which making use of gangue for highway engineering is an example. There are many advantages foi applying gangue as base course material to construct highways. At the same time,a suitable means for treating this kind of industry waste has been obtained. Concerned with the gangue used as a base course material of pavement,this paper explores the following aspects in detail;its advantages,scope of usage,economic benefits,etc.
1999 Vol. 16 (1): 114-117 [
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CONSTRUCTION TECHNIQUE OF BITUMINOUS CONCRETE PAVE?MENT FOR HIGH-GRADE HIGHWAYS
DONG Wensheng
There are two kinds of pavement for the High-grade highways, i. e, bituminous concrete pavement and cement concrete pavement. The bituminous concrete pavement has been widely applied on high-grade highways especially on expressways for the following reasons:having superior running properties，convenient construction method,better operating and maintenance conditions，reasonable economics.etc. Based on the construction practices of the bituminous concrete pavement for several ex?pressways and the I-grade high-ways ,the paper introduces systematically its working specialities , prin?ciple ,procedure, selection of engineering mechinary,technical standards,quality control,etc.
1999 Vol. 16 (1): 118-124 [
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125
THE CHOICE OF STEEL-PIPE-SHIELD CONSTRUCTION EQUIPMENT AND ITS APPLICATION
XIAO Ruiwen
After having analysed the geology of Erlangshan Tunnel and compared several kinds of be?forehand bracing technologies，the paper draws a conclusion as follows：the technique of beforehand bracing with large steel-pipe-shield is fairly effective for construction of soft and weak fracture zone, and the Ingersollrand KR80412 Pipe Shield Boring Machine offers better guarantee for this kind of bracing. Moreover ,the paper also introduces the working principle.the specification and application ef?fect of the aforesaid Boring Machine.
1999 Vol. 16 (1): 125-128 [
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129
QUALITY MANAGEMENT IN WORK SITE FOR ENGINEERING PRO?JECTS
YAN Zhangbo
For engineering projcets,the paper expounds the main missions of the construaction quality management in work site. Several important works which shoud be done well are also described in de?tail as follows；doing well the examination of design drawings,doing well the technical illustration and making sure the plan of quality management,opening up pre-construction inspection works,doing well technical check,material test,examination and acceptance of concealed works and partial works,as well as the final quality acceptance and evaluation works.
1999 Vol. 16 (1): 129-130 [
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131
TALK ABOUT“ACHIEVE BENEFITS THROUGH EQUIPMENTS”
HAN Xingxu
During the procedure from planning economics converted into market economics in railways, the working front of equipment management must be extended- The establishment of a new mechanism and model of railway equipment management should be explored actively to promote effective uti?lization and optimum installation of equipment resources, so as to raise the utilization ratio of equip?ments ,increase the output,achieve the benefits,strengthen the market competitive ability and realize an equipment management system with overall-position，multi-layer and safety-benefit-mode. The pa?per expounds the particular contents,method and quantitative calculation of benefits for doing well the equipment management works.
1999 Vol. 16 (1): 131-134 [
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