Research conclusions:(1)In the process of geological route selection，a combination of exploration methods such as remote sensing, geological mapping, drilling, and test are used，and the engineering geological conditions along the line are made clear. ( 2)The main decisive factors of the engineering geological conditions in the route selection are sand， soft soil，saline soil，salt rock，the”avoidance oriented" principle should be followed in the route selection.(3)By comparing the north line scheme(CK)，middle line scheme(C9K) and the south line scheme(C10K)，the middle line scheme outperforms the other two，thus be recommended. (4)This research should be of some value to the route selection of the engineering project in the similar area for reference.

Research conclusions:(1)In the Qaidam lake deposited basin，the salt is continuously carried and deposited in this relatively closed basin，wind and water as the medium. (2)The salt lake located in the footslope of the Qilian Mountains and the Kunlun Mountains is amply supplied with water, the soft clay，seasonally frozen soil and karst are widely distributed and difficult to be disposed，the route is chose to pass around. (3)In the region of Yadang landform，the land is covered by the “salt bed”，some part is desertificated，the bridge-plan is chosen to pass through the sand belt in short distance. (4)In the dry early lake sedimentary basin，the geological conditions are relatively good for the route passing though in long distance. (5)In engineering construction，the sand should be controlled by salt，the “salt bed" should be protected，the water environment should be controlled in stability. (6)The research results provide a certain reference value for line selection and engineering design of the similar geological characteristics.

Research conclusions:(1)Yuxi to Mohan railway landform undulates terribly，geological conditions are complicated， risk is higher. With the comprehensive comparison of lots of schemes，make the route through the hot springs low temperature zone，the influence of active faults is small，tunnel risk is reduced greatly，and a solid foundation for the future design is laid. (2)Different railway projects has the different risk of route design. According to the principle of route design that risk should be analyzed，from the analysis of the design process，the comprehensive route design on geology and risk in pre-feasibility phases is dominated by macro analysis，the route selection principle of significant risk should be dominated by regional geological data and site reconnaissance situation，thus instruct route selection design. Based on further investigation on the geological conditions，the major geological risk should be verified in feasibility phases，the geological special research is carried out when necessary，engineering measures should be implemented in the preliminary design and construction drawing phases.(3)This research has a certain reference significance for other high-risk railway projects.

Research conclusions:(1)Based on the studies，successive routes would have great impacts on the passing capacity of high-speed railway stations and the arrival intervals at stations increase by more than 2.3 min and so do the arrival-running through intervals.(2)Setting catch sidings concurrently is not an effective solution either, so setting catch sidings is not necessary.(3)The research results have a reference for the stations design and the passing capacity analysis of high-speed railway.

Research conclusions: Compared with the other static shift correction method，the static shift parameter that is estimated based on impedance phase can be close to the true value，artificial arbitrariness is smaller. Use shift parameter for translation of anomaly measured curve，according to the one-dimensional inversion curve results after the translation construct a reasonable initial model for the two-dimensional inversion. On the basis, we do two-dimensional inversion for the original data，which not only can effectively eliminate the influence of static shift on the deep structure of inversion model, but also can get the right shallow electrical structure in the inversion. The model calculation and engineering cases show that the estimation algorithm of the static shift and its application method in the inversion，can effectively removal the two-dimensional magnetotelluric static shift.

Research conclusions:(1)The detection of coal mine goaf using the transient electromagnetic method(TEM)，the seismic reflection method and the radon measurement method by active charcoal is feasible and effevtive.(2)On the basis of geophysical characteristics of goaf and by means of the transient electromagnetic method，it is necessary to detect with a variety of integrated geophysical technology.(3)The detection of coal mine goaf should use the integrated geophysical method of collecting data, geology survey geophysical prospecting and misering to achieve mutual complementation and verification. (4)Practical application demonstrates that the integrated geophysical technology has become the preferred technology for solving the detection of the coal mine goaf area. The scope of coal mine goaf can be delimited accurately using integrated geophysical technology, which could provide the basis for the alignment selection，coal mine goaf investigation and treatment.

Research conclusions: (1)The method was applied in the preliminary design and construction design stage of many railway projects，which was verified in engineering practice. The recognition and statistical accuracy of the roadbed cross section is above 90%.(2)The method solved the problem of earthwork quantities automatic statistics effectively， improved the efficiency and accuracy of statistics，and can be used in the production design on the basis of article pretreatment and calibration. The software which is extracted from the study is widely used in railway engineering design.

Research conclusions:(1)At the condition of control relevant physical parameters of excavation and piling, measures of isolation to protection if necessary，channel excavation and piling can be done with HSR at normal operating speed. (2)Numerical analysis of newly-built channel paralleled with Shanghai-Nanjing Intercity shows that the main impact of the additional lateral deformation of the piers on additional settlement of pier is very small.(3)Stress releasing caused by isolated pile drilling, together with unfavorable effects caused by channel excavation，leads to adverse additional deformation of HSR bridge pier.(4)To reduce the additional lateral deformation of HSR bridge pier, increasing the length，instead of stiffness of the isolation pile is effective，especially at good bearing layer.(5)The research results have the reference value in safety evaluation of HSR bridge disturbed by large volumes soil engineering nearby.

Research conclusions ; Through the comparative analysis，it is concluded:(1)Straddle monorail is more suitable for Wujiang monorail project than suspended monorail. (2)From an economic and construction perspective，simply beam structure system is better than continuous beam. (3)Combining of landscape and environmental requirements，pier and beam are recommend to use the steel structure，foundation uses the reinforced concrete structure，cast steel supports are used for tension bearing. (4)Due to the beam weighing of 15 tons and pier height of 8m，the construction method using auto to hoist and erect is recommended. (5)The research results of this paper can be applied to single line straddle mon-orail transportation.

Research conclusions:(1)The fundamental frequency of structure is longitudinal vibration，and the frequency is 0.401 Hz，the second modes is transverse vibration，and the frequency is 0. 657 Hz，the first-order vertical bending frequency is 1.125 Hz. (2)When the passenger train runs at 200 km/h，the requirements of the vehicle running safety and stability can be met，and the transverse and vertical comfort indexes are excellent; When the freight train runs at 120 km/h，the requirements of the vehicle running safety and stability can be met; A-type high piers can better solve the problem of dynamic performance of long-span continuous rigid frame bridge.(3)The first bridge transverse vibration period has a greater influence on the bridge transverse amplitude，but the effect of vertical，transverse acceleration of the beam body is not clear.(4)The vehicle response on bridge transverse vibration period is not sensitive，the rule that the bridge transverse vibration period reflect the operation safety，comfort and stationarity of vehicles on the bridge is not obvious，and no significant correlation between the two exists. (5)This paper has a certain guiding significance for the design of railway bridge with high piers and long-span.

Research conclusions: Shear capacity of shear connector was calculated according to some standard. The conclusions are:(1)'Code for Design of Steel Structures' and 'EC4' are similar in calculation，either of which is not considering fatigue and crack. They provide a minimum number of shear connectors. (2)' Steel Bridges'(Onishi Ichiro) gives us a conservative method and takes fatigue and interface slip into account. This method provides a better durability. (3)'Modern Steel Bridges'(Wu Chong) calculates shear capacity in the same way as 'Steel Bridges'(Onishi Ichiro). (4)'Code for Design of Composite Steel and Concrete Railway Bridges' is a reference of 'EC4'. (5)'Code for Design of Composite Steel and Concrete Bridges' is similar as 'Code for Design of Steel Structures'. Furthermore，it considers stud shear failure，concrete crushing and group nail effect.(6)This research results provide a reference for the design of shear connector of steel concrete composite beam.

Research conclusions:In this paper, the research based on the external environment about Yellow River tunnel of Lanzhou metro analyzs the design difficulty of this project，to obtain design scheme of Yellow River tunnel. The section adopts these measures such as double-line ipsilateral upstream passing round bridge pier, two lines single hole tunnels， indirect control mode slurry shield construction，prefabricated reinforced concrete segment lining, two types waterproofing measure. The ancillary facilities such as air shaft，connected aisle and waste water pump room，the fire protection and rescue facilities such as composite section evacuation platform，air shaft，connected aisle and floodgate and so on are set up，thus a whole set of completed design program of Yellow River tunnel take shape. The related conclusion and experience could enrich the building technique of under through river tunnel in domestic; it could provide reference and consult for the construction of subsequent similar engineering.

Research conclusions:(1)Although metamorphic strata are hard rocks，because of complicated geological condition， possibility of deformation and failure of surrounding rocks increases.(2)On the basis of field construction and measurement，information design is adopted in Yanmenguan tunnel construction to effectively control large deformation， thus assuring construction safety and controlling the engineering cost simultaneously.(3)Some technology are put forward such as tough supporting and rapid closing, setting temporary invert，grouting reinforcement with long rope bolt， using pipe roofs for clearance-intrusion treatment and reinforce secondary lining, etc. (4)The research results have extensive application values for tunnel design in complicated geological condition.

Research conclusions:(1)In economically developed areas，when railway passenger traffic and passenger flow grow too fast and exceed hub passenger capacity，a new passenger station needs to be considered.(2)About the new station site，on one hand a smooth railway line should be taken into account according to passenger traffic and passenger flow， on the other hand the accessibility of urban passenger should be considered in accordance with urban traffic planning. (3)Considering the nature and characteristics of railway lines，the station scale and layout should be designed reasonably to reduce the interference and cross，improve the sending and receiving capacity and carrying capacity. (4)The quantity and arrangement of the station building should be set reasonably according to passenger flow line，urban rail transit and passenger transfer requirements.

Research conclusions:(1)In this paper, as to complexity of the three types of ground fissures site，first use 18 tons of artificial shallow seismic source seismic reflection prospecting, second drill and verify seismic anomalies，to find out the ground fissures.(2)Seismic tests showed the ground fissures positions which are interpreted by the obvious physical differences agree well with the drilling results. It is one of the effective and credible means.(3)The use of large tonnage vibrator vehicle under urban road environment，interference effects，exploration accuracy and depth have reached the expected requirements，which can be used in the ground fissure investigation. (4)It is also a demonstration and guidance on the survey of concealed fault.

Research conclusions:(1)The project adopts the top-down method construction and special construction process， which is the safe and effective engineering work to super large and deep foundation pit，and make the project smoothly and safely implement. (2)Double high pressure jet grouting pile is the advanced wall joints waterproof measures，so that the engineering of groundwater has been effectively controlled.(3)This engineering provides a successful example for similar super large and deep foundation pit waterproof curtain and even the wall joints waterproof design，and has a larger reference value for research，design，construction of a new subway station structure of combined construction of highway and subway.

Research conclusions:From the study，it is concluded:(1)The longitudinal reinforcement length should be the sum of shield length and 1-2 times of segment width which is determined by soil stability and watertightness. The reinforcement length which is determined by soil stability is only 3-4 m. ( 2 ) The limitation of hinge plate with sealing rubber sheet is put forward due to rubber aging and the relatively lower sealing pressure，and also the box sealing device is applied in slurry shield project due to the relatevily higher sealing pressure and reliable performance.(3)The advantages of shield airtight launching device on risk control, construction period guarantee，and environment protection are made clear.(4)The shield airtight launching device can be adopted in all types of shield launching project especially for strict control requirement of surrounding environment and no pipeline movement.

Research conclusions:(1)Based on the passenger flow fluctuation of rail transit lines , different car-set trains can be run in peak hours and off-peak hours. Under such situation，train full load efficiency will be assured，empty running will be lowered. At the saved to a certain extent, same time，the train frequency and serving level will be enhanced，and operation cost can be (2) The mode of train coupling and uncoupling in the the study on the realization technology of vehicle and signal , flexible car car depot is recommended. (3) Through set operation organization is feasible. (4) Flexible car-set operation organization scheme has an important significance on rail transits lines whose passenger flow vary remarkably, it can meet the needs of passengers and save operation cost, so it has a high extension value.

Research conclusions ; Through the study on express and slow train running organization mode system，the conclusions are drawn that in the design stage the study should be made on determination of system capacity loss，determination method of express train station，determination method of overtaking point，comparison of overtaking stationsidings design and overtaking scheme evaluation method. The study results can be used as design basis organizing express train and slow train mixed operation in the metro engineering and also provide the theoretical reference for organizing the express and slow mixed operation using existing facilities in the operation stage of the existing line.

Research conclusions:(1)Using reclaimed water as air conditioning recirculating cooling water in subway is feasible， through pertinently advanced treatment，reclaimed water could be used as cooling water.(2)Although the initial investment of economic increases，but the operating cost is reduced.(3)On the whole，replenishment amount is bigger, the economic benefit is more.(4)The research provides a new idea for the choice of makeup water for air conditioning recirculating cooling water and the using mode of reclaimed water, which has a certain guiding significance to specific implementation.

Research conclusions:The measures in comprehensive office building achieve the line with the National Building Award，LEED gold medal assessment level:(1)The energy saving measures of double glass curtain wall，ground source heat pump system，tunnel ventilation system，intelligent lighting systems，photovoltaic optical system，fully embody the applicability of emerging technologies in green building.(2)The train application of regenerative braking system embodies the characteristics of rail transit construction.(3) The rainwater recycling system meets the assessment standards of green building water saving and water resources utilization.(4)It can provide the reference for similar green building in rail transit system.

Research conclusions:(1)The external financing channels such as bond financing, equity financing，credit financing， finance lease，and export credit are important financing platforms of solving the financing issues.(2)The innovative financing modes such as sustainable ticket，preference shares，exchange bonds will increase the equities and release the financial pressure of the enterprises，which could fulfill the long-term financing requirement for central government-owned enterprises.(3)The new modes including ECP+F，BT，BOT, TOD and PPP are efficient financing channels for promoting the investment and construction capacity of central government-owned construction enterprises in the field of large infrastructure projects.(4)The research result could be utilized to improve the financing capacity of central government-owned construction enterprises.