Research conclusions：(1) The work of assessment of the geological disasters risk should be done well in the stage of the project plan so as to clearly know the current and latent geological disasters risk. (2) The work of assessment of the geological disasters risk should be done for both risks of the sudden happening geological disaster and slow change geological disaster. (3) The identification and analyses should be made for the existing risk and assessed risk, and the danger classes and dange scale of different types of disaster should be defined and assessed with quantum molecular identification method. Meanwhile the rational measures for prevention of the different disasters should be proposed.

Research conclusions：The main influencing factors can be considered with probability integration method. The calculation parameters for the rock displacement should be rationally chosen for precise prediction of the result of surface deformation in goaf in accordance with the geological conditions, coal storing volume and technological condition. The analysis indicates that the railway route in the original plan locates in the influencing range of coalmine goafs and the deformation value exceeds the allowable value. So, the goafs should be treated or railway route should be adjusted to ensure the safety of high-speed railway. However, there are lots of the factors to influence displacement deformation of the rock, so the calculation parameters should be chosen according to surveyed data.

Research conclusions：There are obviously different about bearing and settlement distortion characteristics between single pile and pile group. The settlement obtained by testing in reinforced area is caused actually by the stab deformation (piles pierce into substratum). The Geddes should be preferred to use in settlement analysis of the piled raft foundation.

Research conclusions：Now, the general and feasible method to analyze the Structure U-Shape Groove is based on the elastic theory. All the loads including their combination behavior should be considered reasonably. The structure should be designed as the beam with single reinforcement, and some essential structure measures should be taken on the sections where there is stress concentration. Besides the stressed steel bar, the hoop, the distribution reinforcement and the reinforced steel bar for the control section are needed. In unfavorable geological area, the structure can be used with other engineering measures to meet the design requirements.

Research conclusions：The vibration of heavy ramming would damage the adjacent resident houses and the vertical Z-weighted vibration acceleration within the house would also exceed the state standard if no countermeasures are taken. The ramming will not induce resonance of the houses if the main frequency of ramming vibration is far away from the house inherent frequency. Vibration-isolation ditch is an effective structure for attenuation of vibration. It is recommended to deepen the vibration-isolation ditch and take out debris in it as well as if necessary, the concrete can be jetted to the ditch wall for better effects. In the meantime, for ensuring safety, the adjacent residents can move out and the monitoring of vibration can be conducted to the houses during the ramming. After completion of construction, the structure of the houses should be repaired.

Research conclusions：After the comparison of Zhangshi Plan with Qingyuan Plan in the fields of land form, geological condition, environment protection, technology and investment, the Zhangshi Plan is recommended. In this plan, the railway station is recommended to locate in Baijialong through comparison of that in Zhouxinzhen in the fields of the technology and investment. In the meantime, the new technologies are adopted for construction of track, subgrade and tunnel to accumulate the experience for construction of passenger dedicated line.

Research conclusions：The ballastless track control network based on free station and linear-angular intersection for high-speed railway is better than the general network in precision and network stability, which can satisfy the precise requirement of high-speed railway construction. The study and analyses of the surveying and data processing of CPII and CPI show the network with one surveying spot very 60m can satisfy the requirement of the track regularity and the control spot is restrained one time about very 500m can save money.

Research conclusions：For how to use a convenient method at the beginning of structure design to determine the span of the bridge in high intensity seismic zone, a useful method is offered in this paper.

Research conclusions：(1) In the situation of fire hazard happening in tunnel, the ventilation of tunnel should be guaranteed in order to maintain peoples' thinking and physical strength. (2) According to the different situations, the measures, such as adopting vertical division, horizontal channels and escaping chute should be taken to help people to escape the disaster area. (3) Considering the possibility of power off in the tunnel, the clear guiding facilities should be installed for power off. (4)Mechanical tools should be simple and reliable and manual operation is preferred. (5) For subway tunnel, the protective measures for the tunnel security should include auto elevator and screen gate. (6) For mountain tunnel, the protective measures should include fire door and fans. (7) For river tunnel, the protective measures should include water proof gate and escaping chute.

Research conclusions：Single conductor cables in 10kV power run-through lines are better to be arranged as an equilateral triangle. The effect of catenary currents should not be neglected when calculating the induced voltage of the metallic sheath. The two ends of the metallic sheath in the single conductor cable shall not be earthed directly. For the cable length up to 2 km, it is grounded with one end direct earthing and the other end protective earthing. Middle direct grounding-two ends protective grounding method can be adopted if the cable length is about between 2 km and 4 km. Metallic sheath cross connection method is advised when the cable length is longer than 4 km.

Research conclusions：The research and analysis of the requirements of catenary-pantograph relation as well as the examined data show the evaluation standard used for the catenary-pantograph relation of Beijing-Tianjin Intercity Railway is feasible, which can be as the technical reference to the OCS design simulation platform and the standard engineering evaluation system in China. The proposals are made that for reducing the off-wire spark of high-speed electrified railway, the pantograph design should be optimized and the tension of contact wire should increase to 30kN, and for reducing the elasticity difference of contact wire, the dropper length should be calculated precisely and the installation error should be controlled strictly during construction.

Research conclusions：The applications of the HGT and its slip-form paving in the Suining-Chongqing Passenger Dedicated Line and the Wuhan-Guangzhou Passenger Dedicated Line show the HGT made from a concrete mixed material with low elastic property can meet the technical requirements and is suitable for slip-form paving to achieve the expected goal. For example, there was no problem appeared to HGT in the MU test at the speed of 351km/h carried out on Wuhan-Guangzhou Passenger Dedicated Line, and it shows the HGT and paving technology are successful.

Research conclusions：Based on considering the effect of smear layer, 16-node constant thickness contact interface elements coupled with 8-node isometric elements are used to simulate the smear layer of drain wells. A relevant finite-element program is made to analyze two practical examples. The result is verified reasonable shows that the coupled element model is effective and can be used in numerical analysis for construction.

Research conclusions：The ecological functions of the land destroyed in the course of railway construction, such as the lands for storing waste soil, for temporary path, for temporary house and for temporary engineering can be restored by adopting the relative reclamation technology and taking relative measures, such as removing surface soil, building irrigation system and installing vegetable layer. These technologies and methods are very useful for restore the ecological function of the destroyed land along the railway.

Research conclusions：The midway between tracks in station is not only related to the facilities of catenary post, noise barrier and canopy column, but also related to the facilities of the structural column of elevated station building, anti-collision wall and longitudinal drainage between tracks. This paper gives data about midway between main line and receiving-departure tracks with or without column, and the midway between receiving-departure tracks respectively.

Research conclusions：The comprehensive analyses of the characteristics of Shenzhen city and its planning, the railway terminals layout, construction conditions, the station site and attracting the passenger with the convenience to them shows the Yitian plan of route selection and station site selection can satisfy the requirements of the city plan and the Yitian Station has favourable conditions for building a modern large-sized transportation terminal. New Shenzhen Station serves the long-distance and cross-line trains and most the trains to Xiamen city, and Yitian Station mainly services the intercity trains.

Research conclusions：Through the research on the upgrading plan of the marshalling station, it is decided to upgrade the up system of marshalling station into two-stage -four-yard and the down system into three-stage-three-yard by using level untwining reasonably with consideration of the numbers of freight train, train flow properties, flexibility of operation route and demands of transport development under condition of no way to adjust the existing layout largely. Therefore, the upgraded station can meet the near and long-term development demands and save the construction investment.

Research conclusions：Set pair analysis theory is a new method to deal with the uncertain and multiplex problems. Through quantitatively analyzing uncertain systems and sequencing the uncertainness of the different programs, the optimum program is obtained by establishing the integrated evaluation model for rail transit in Lagos with the set pair analysis theory, determining the index weight with analytic hierarchy process and establishing the evaluation index system for evaluation and estimation of a number of optional programs. The results show that the set pair analysis theory can be used for optimizing the track program of rail transit.

Research conclusions：It is concluded from researching the design of transfer plan for West Metro Station of Hongqiao Traffic Hub that for the large-sized integral traffic hub, the transfer plan should pay more attention to the transportation mode with the biggest passenger flow and the large amount of passengers demanding transfer, and it should be known where the transfer passengers come from and where to go for designing the transfer plan more reasonable to realize the "jointless connection and zero transfer".

Research conclusions：To the large cross section metro with function of untwining passenger flow, the mature and reliable moving-like block ATC system based on the digital track circuitnot only satisfies SIL4 safety requirement, but also meets the main technical operation indexes, such as 90s headway, 120s turnaround interval, etc. In the meantime, the safe and reliable technical interfaces can be also realized with the corresponding systems, including communications, power supply system monitoring, platform screen door system and flood gate system, etc.

Research conclusions：Through the simulation calculation, the highest train speed of the No.3 rapid rail line is 79 km/h and the biggest braking distance is 657 m. However, considering the necessary safe distance, the maximum blocking section length will be 700m that can satisfy the requirement of train operation, and considering the requirements of the train returning and the train speed, the minimum blocking section length around the kaifaqu Station will be 200m that can satisfy the requirement. With fixed automatic block, the speed grade of signal equipment should be consistent with the train speed without limitation of the normal train operation for increasing the train speed.

Research conclusions：The operation requirement, economic rationality, signaling system and civil structure should be considered in the design because the relation is complicated between the location of wayside device of signaling system and location of the auxiliary track. Based on the analyses and calculation, the concrete requirements are presented to layout of the auxiliary track, which can overcome the limitation to the signaling system caused by civil engineering and meet the operation requirement of signaling system for urban mass transit.

Research conclusions：Through the analysis and comparison of the three wireless technologies of WLAN, WMAX and Mesh, application of WLAN technology can realize the bi-high speed telecommunication for subway between train and the station of subway, which is the most advanced, practical and reliable real-time telecommunication mode that can satisfy the communication for high-speed train of subway.

Research conclusions：In the course of high-grade railway construction organization design, the more attention should be paid to combining the construction organization with the plans of construction schedule, the location and scale of laying rail, the beam construction, the location and scale of fabricating beam and materials supply. For defining the engineering cos,t the focuses should be made on the technical and economic comparisons of the track and bridge construction plans, earth-borrowing (stone) plan and infrastructure construction plans so as to correctly reflect the requirements of the design and construction.