Research conclusions:Perfect dealing with the relation between cutting and tunnel construction and ecological environmentand reasonable choice of the construction plan of cutting and tunnel are the bases to solve the conflict between cutting and tunnel construction and ecological environmen.t The verification shows choice of the plan of cutting and tunnelwith comprehensive consideration of ecology, technology and economics can lower the influence of highway construction on ecological environment to the minimum and it is one of countermeasures for dealing with the relation between highway construction inmountain area and protection ofecological environment.

Research conclusions:(1) Installation ofoverhead oilpipeline in permafrost region can extremely reduce the influence of unfavorable engineering geology on the security of the oilpipeline. (2) Themain reason for the pipelines' deformation damage and inducing disaster to the pipeline is the difference in freezing and thawing deformation in permafrost region.Therefore, reducing the absolute value of frostheave or thawing settlementdeformation to slow down the acute degree of the pipelines' differential deformation in the vertical direction is an effective way to overcome the deformation damage.(3) In the unfavorable geological areawith expansive sensitive soil and ice -rich frozen soi,l themeasures of insulating the pipeline, replacementof filling and thickening the pipewall can be taken foreliminating or reducing axially uneven deformation of the pipeline.

Research conclusions:(1)The characteristics and mechanical properties of the karst caves ofQipanshi Tunnel are analyzedwith geological knowledge, and the location and size of the caves in the leftside of tunnelwall are speculated.(2)The ground probing radar is used to probe the left side of tunnelwall and the tunnel bottom, and the probing result shows thata large karst cave exists in the left side of the tunnel and it conforms to the speculated results, except the deviation in position. The reasons for the deviation are analyzed. (3)The comprehensive geological knowledge and geophysical equipmentare two necessary conditions to do the geological forecast perfectly.

Research conclusions:The precision control of every construction process is the key pointduring the ballastless. The survey control network to meet the measurement precision requirements is essential to laying the ballastless track.However, the real construction quality depends on the quality of the coarse adjustmen,t fine adjustment and concrete pouring. The sequencing and normative construction is also the key point of guaranteeing the track construction quality under condition ofguaranteeing the precision of rail anchor, strutboltand fine turning rail system.

Research conclusions:The optimal cable force is solvedwith non -linear iterative calculation and taking the cable and frame structure as an integrated structure. Through the iterative calculation and the calculations for the normal assembly and reverse disassembly of the frame segmen,t the optimal cable force before closure is obtained and the control data about tube stress and elevation of the steel tube frame during hoisting the frame are offered. The application shows this method canmake sure that the steel tube frame has the perfect closure condition and the accurate data aboutelevation can be offered. This is significant to guide hoisting the steel tube frame ofLuobuxiBridge.

Research conclusions:Through researching temperature control for the streammaintenance of32m boxgirder inwinter, the temperature control parameters for stream maintenance of concrete box girder in four stages in winter and the precasting technique of the girderare offered. The application shows all the indexes of the precasted concrete box girder meet requirements of"TechnicalSpecifications forConcrete PrecastedGirder forPassengerDedicated Line", the period ofprecasting the box girder is shortened and the precasting quality of the box girder is ensured. All of these create the foundation ofensuring the construction process.

Research conclusions:The analyses of the train operation stability index calculated from vehicle -bridge coupling finite elementdynamic simulation and on -site testdata for the passenger and freight train atdifferent speeds show when the speed ofexistingC62 -model freighttrain reaches65 km /h and new type freighttrainK2 runs at100 km /h, the vertical and lateraldisplacementof longitudinalgirder, maximum lateraldisplacementof frusta top and dynamic ratio ofdefection to span can stillmeet the requirementof tolerable values, and the all dynamic performances ofvehicles are good.

Research conclusions:The risk of ship hittingChongqing-SuiningRailways' Caojie JialingRiverBridge is studied and analyzedwith the AASHTO method. The annual ship hitting ratio of the bridge and the annual collapse ratio of the bridge under conditions of the predicted shipping situation in near-term andmedium and long-term are obtained from the study and analysis, and the corresponding proposals aremade to provide the foundation for further study and provide the basis for the security assessment for ship hitting.

Research conclusions:The hydrogeologicaland engineering geological survey and the comprehensive analysesof the data obtained from geophysicalprospecting and drilling indicate that in the tunnel area, the developmentof regional structure and the rich -water conductivity of the fracture zone of the fault lead to the groundwaterdevelopmen.t The groundwater mainly contains the faultzonewater and the bedrock fissurewater. Generally, the faultzonewater is heavy richwater,while the bedrock fissurewater isweak -medium richwater. The concentrated inrushwater segments of the tunnel are mainly in the zone of developed faults. As the inrush water of fault is large and the inrush may happen, the water blocking should be as the main protective measures and the geological forecast in advance should be well conducted during the construction period.

Research conclusions:The three -step temporary inverted arch method can be adopted to the single -track railway tunne,l with strictcontrolof the step lengthsof the step, inverted arch and secondary lining after installation of sectional concrete inverted arch on the top step forgetting the perfectcontrol effec.t The appropriate deformation quantity should be remained in advance to the large deformation tunnel according to themonitored andmeasured data. This is essential to preventof the support's damage in early -stage, the protected arch 's crack in later -stage and the control of construction cos.t The tunnel deformation is restrained to some extent after grouting through the back of the primary supportwalland improvementsof the type ofsteel frame, the form and location of the jointand installation of the vertical connection. The long step construction orkerve has to be forbidden during construction.

Research conclusions:From the prediction of rock outburst in two phases, it is known that compared with the state in the pas,t the length ofslightrock outburstareawas reduced, but the length ofmedium rock outburstareawas almost the same, and generally the rock outbursthappens in the side wall of tunne.l Therefore, criterion ofRussense is the most suitable toCangling Tunne,l and the stress of internal structure in the tunnel obtained from the research in the early -stage is comparatively accurate. With the means of theoretic analysis and real test and combined with the prediction mode for rock outburstin two phases, the rock outburstin certain area in frontof theworking face ispredicted correctly.Thismethod is feasible forpredicting the rock outburst.

Research conclusions:The P -Q -tcurve analysismethod, the analysismethod for the yieldingwaterquantity from the bore, the grouting quantity analysismethod, the determination ofyieldingwaterquantity from the check -up bore, and the check -up bore stability analysismustbe used forexamining and evaluating the grouting effect to the high –pressure and rich -water faul.t The analysis method for the yielding water quantity from the bore and the determination of yieldingwaterquantity from the check -up bore are used forexamining the ponding effec.t The P -Q -tcurve analysis method, the grouting quantity analysis method and the check -up bore stability analysis are used for examining reinforcing effec.t The on -site tests and several grouting cycle tests forF11 high -pressure and rich -water fault of Qiyueshan Tunnel show the standard of2 litres perminute /permeter for the yieldingwater from the check -up bore is feasible and reliable.

Research conclusions:Ground surface settlementhappenswithin the range from 1D ahead the cutting face to 2D after the tail during the shield driving. The ground is disturbedmore greatlywith increasing ofburied depth. The tailvoid of the shield is the major factor to induce the ground movemen.t Before the arrival of cutting face, ground will displace alongwith the driving direction. This displacementwill decrease and then increase as the shield passing because of ground settlemen,t and becomesmaximum after the completion of tunnel.

Research conclusions:Liulin Tunnel is located in the crowded population area. Successful construction of its entrance shows the construction scheme, construction method and constructionmeasured for the tunnelare economic and feasible.The method and scheme ofadopting short footage, loose blas,t static blas t, small pilot tunnel along with using anchor to spurt the ne t, the steel pipe column to hang the Bruckernetand to laymortar to the slice stone overcome the problems in construction of the tunnel entrance in the steep slope and crowed population area and the problems of synchronic operation for the tunnel connectedwith bridge, andmeet the requirements under special construction condition.

Research conclusions:The successful construction method adopted for Dabieshan tunnel is presented in the paper. It shows the rapid tunnel construction can be achieved if the construction organization is reasonable, the critical issues are focused on, the strict management is implemented, and the drill and blast technology is used along with ordinary machinery. The average daily drilling ratio of Dabieshan Tunnel is 7. 5 m, with the maximum monthly drilling ratio of 240 m.

Research conclusions:Application of jet fans technology to induct air vertical flow is an effective ventilation mode for long tunne.l The full-jetvertical induction ventilationmode used forQueletageMountain Tunnel 2 is feasible, and it notonly meets the requirement of the design criteria, but also ensures the operational safety of the tunne.l The computingmethod presented in this paper for full-jetvertical ventilation can be used for the similarworks.

Research conclusions:Compared with the application of the traditional turn outdriving system, this paper analyzes the defects of the controlmode for traditional safety relay, describes the working principle and controlmode of software redundancy control and hardware redundancy control systems, and puts forward that the hardware redundancy control system willbe the developmentdirection for the control system in the future.

Research conclusions:The short-circuit test of traction power system is an indispensable testwork in the phase of integration test of passenger dedicated line. The short-circuit testprocedure, method and evaluation used forBeijing-Tianjin Intercity Railway are suitable, correct and reliable. The installation quality, system function and system performance of traction power system can be verified by standardization of actual short-circuit test and the relative parameters can be optimized according to the test results.

Research conclusions:In this paper, based on the theory on the seismic wave transmitting in sticky elastic medium, the function relation between the blasting vibration frequency andmain influence factors, such as explosive and distance, is put forward, the regression analysis ismade for the realmonitored data on the blasting vibration obtained in Shenzheng Meishi Power Plantand the prediction formula for the master frequency under the specialblasting condition is obtained.These can be as the practical and theoretic albasis for studying the attenuation regulation of blasting vibration frequency and forprediction of themaster frequency of the similar blasting. The study finds the master frequency of the blasting vibration decreaseswith the increases of the explosive and distance.

Research conclusions:(1) The controlled pre -blast technology was used for divisional and partial demolition of the support structure for secondary lining and the controlled weak smooth blast technology was used to the face for expansive excavation with bench and full-face method. By taking a series of technical measures, such as control of the explosive quantities, establishment of a number of the free faces, improvement of the transmission way and application of non -electric millisecond detonator network, the purpose of reducing blasting vibration was reached. (2) The real –time monitoring was conducted to the blasting vibration and it showed the monitored data accorded with the requirements of the process and target control, achieving the good effect. The shallow buried tunnel was constructed successfully in Yichang and Wanzhou areas with broken rocks and karst development, following the subsequence of "first construction single -track tunnel and later construction of double -track tunnel by demolition and expansive excavation blasting".

Research conclusions:According to the different resource distribution mode, different announcement mode and different group call end and releasemodes, the discussions and descriptions are made for the different time of setting up group call and the occupation ofdifferentGSM -R resources aswell as the detailed flowsof setting up group call, the callend and call release with A Interface protoco.l In real test, selection of which resource allocation to the corresponding equipment should be careful on the basis of consideration of network resource situation, network co-operating situation and the actual demands of railway dispatching operation.

Research conclusions:The wireless data transmission technology was used for monitoring the whole construction process in the course ofunderpinning the pier forBinzhou LightRail in Tianjin, obtaining the reliable data in time and realizing the data real-time collection and display to provide the basis for the decision -making for each construction process.The wireless data transmission technology is better than thewire data transmission technology and it can be used in the other construction monitoring or long-term health monitoring.

Research conclusions:The Suzhou -Wuxi -Changzhou metropolitan region is one of the most developed areas in economy in China, with the economic foundation of developing the urbanmass transi.t As the contradiction between the supply and demand in traffic hasbecome obvious and the urbanmass transithas the comparative advantage, the Suzhou -Wuxi-Changzhou metropolitan regionwillusher in the upsurge ofurbanmass transit construction. The nextworks are offered to realize the rapid development of urban mass transit in the Suzhou -Wuxi -Changzhou metropolitan region,including railway system reform, appropriately advanced construction of infrastructure, deepening the line linkswith the network at the different levels and establishing themarket financing system.

Taking the transport plan in " Twelfth Five -year Plan" period in China as the background, through analysis and study of the interaction between regional coordinated development and transport system in foreign countries, this paper tries to explore the direction of interactive relationship between regional coordinated developmentand transport system in China, in order to provide reference to the decision -making. Research conclusions:(1) Enlargement of the transport economic region and city belt, even the city complexhas to be guided by the distribution of the transport system in order to reduce the economic gap between urban area and rural area for achieving the goal of harmonious development. (2) Plan of regional development has to have perspective in order that the construction and development of the transport system can satisfy the demand of the regional economic development forproviding the perfectservice quality and guide to the regionaleconomic developmen.t At the same time,working out the law, regulation and system for the whole region and transport is the important means for smooth implement of the plans in all phases. (3) Establishmentofmulti-mode transportsystem to guide the region expansion is very important to the regional coordinated development.