Research conclusions :(1) It is reasonable that the transport distance from the coal mines to the main harbours is 600 － 800 kilometers． (2) In the annual planning，the coals from the coalfields of the Baiyinhua，Baqibei，Wujianfang and Bayanbaolige will be taken as the main coal resources ，the harbours of Jinzhou，Caofeidian and Suizhong will be taken as the main harbours for sea － shipping and the railways from Baiyinhua to Jinzhou，from Xilinhaote to Caofeidian，from Xichi to Cisui and from Bayanwula to Xinqiu，Fuxin，Yixian and Jinzhou will form the railway corridor system． (3) It is for sea － shipping to provide the perfect and strong railway corridor for sea － shipping the coal in the eastern region of Inner Mongolia．

Research conclusions:As the first element of railway construction，the railway alignment should adhere to the principle of " serving the local as the foundation" and the opinions of the local government on the railway alignment and the station installation should be asked for． The good communication with the government should be conducted and the optional schemes for the railway alignment should be compared when the the government demand conflicts with the whole railway construction． Also，the principle should be followed．

Research conclusions:(1) The transition curve length of the railway line for mixed passenger and freight traffic with speed of 250 km / h need consider the unbalanced rate of lateral acceleration slope and rate of superelevation slope． (2) When the radius of curve is certain ，the superelevation is greater with the higher speed; when the speed of the high － speed train traffic is certain ，the value of the design superelevation is the main factor which determines transition curve length． (3)The mixed passenger and freight traffic with speed of 250 km / h need consider the comfort and the safety of the high － speed train and the low － speed train， the value of design superelevation is smaller than the passenger dedicated line ， and the transition curve length is shorter．

Research conclusions: Compared with the traditional trigonometric leveling method，the middle way trigonometric leveling method is innovative in field operating ． The advantage of this method is that it can basically eliminate atmospheric refraction and earth curvature effects and can get results quickly without measuring instrument and prism heights． Because of its simpleness and efficiency，this method can be widely used to reach second － class standard of elevation measurement requirements． Additionally ，to develop the more appropriate technical parameters for some measurement tolerance (such as vertical angle Index Error between observation sets and divergence of Index Error)，we should do more testing and do more analysis of test results in the course of future measurement．

Research conclusions:With the actual physical parameters，we effectively simulated the seismic imaging profile． On modeling profile，we can see a significant geophysical anomaly，effectively reflecting the complex structure of the wave field in the shape and characteristics． The finite － difference numerical simulation method allows speed to change vertical- ly and laterally，and better used on actual model． It’s effective for modeling common － offset profile． Through research， we can more accurately determine the anomaly location and shape，and improve the exploring precision． It has a certain significance to the interpretation of actual work．

Research conclusions :Through analysing the principle of probobility integral deeply and summing up the experience，a new kind of probability distribution model (the asymmetric possibility distribution model) is presented according to the characteristics of the random medium theory． The relation between the probability distribution model and major influence radius r is analyzed． With the increase of the mining depth ，the variation of the negative exponential function by section occurs to the r value． Taking the calculation parameters of the probability integral and the face subdivision method as breakthrough point ，and according to the occurrence characteristics of large inclination of inclined coal seam，it is put forward that subdivising the face along its strike can effectively correct the idealized defects of the probability integral model． The calculation example proves that this method can effectively improve the accuracy of the deformation prediction for railway － underlying goaf． It plays a positive guiding role in the railway alignment ， railway design and goaf disposal．

Research conclusions:With the general limit equilibrium method of the numerical integral form，it is unnecessary to itemize manually and it avoids the tedious work of itemized calculation and improves the computation accuracy． By using the one － dimensiona iterative method to calculate ，the calculation process can be simplified and it is easy to program． The calculation example shows this method has high computation accuracy and use value．

Research conclusions:(1)The joist load distribution should be changed from the even distribution into the saddle － shaped distribution or ladder － shaped distribution． The coordinated effect of the pile foundation should be taken into account in calculation of the internal force for the joist． (2) Taking the calculation presented in this paper，the bending moment value in the span of the joist decreases by about 40% while the variation of the shear force is small． (3) The size and the reinforcement of the joist designed with the traditional calculation model should be further optimized．

Research conclusions:Numerical simulation has been employed to perform cone penetration analysis for understanding of the soil behavior during cone penetration process． During static cone penetration process，most of the radial compression occurs within 1 － 2 times the probe diameter range ，the maximum radial stress occurs in the underside of parts of the probe cone． In the same cone penetration rate，with the increasing of stress ratio value M，the foundation soil vertical stress，shear stress，excess pore water pressure and specific penetration resistance ratio were gradually increasing; With the increasing of logarithmic bulk modulus λ ， the radial stress and vertical stress of the foundation soil were gradually increasing，the shear stress，excess pore water pressure and specific penetration resistance ratio were decreasing． Furthermore，the empirical formulas between cone penetration parameters and soil engineering properties in“Code for in － suit measurement of railway engineering geology”were coincident well with numerical simulation results． This paper has a useful reference to the theoretical and applied research in the field of in situ test for geotechnical．

Research conclusions:The pile + plate structure and CFG pile composite foundation was used for reinforcing the deep soft soil foundation along with the heap pre － loading． The settlement volume during construction was up to the 72% － 85% of the total settlement volume，so the post － construction settlement was effectively controlled． The vertical settlement of the foundation in the whole section was even and it met the demand of laying the ballstless track and proved the reinforcement measures were feasible．

Research conclusions:The augmentation of the basket handle inclination of one － tube’s sloping angle is beneficial to improve the stability of the arch bridge ，while the spatial position of one － tube has little effects on it． Besides，the design of K － type crossbar at the impost of arch is very necessary，which greatly improve the stability of whole bridge structure． However ，there is no marked distinction on the structural stability between 米 － type crossbar and K － type crossbar． Increasing the cross － section of arch ribs has little effects on improving their transversal stability．

Research conclusions:By comparing the results model analysis，the bending moment and shear of continuous beam are different in two construction method． Compared with the cradle cantilever casting method，using large segmental Support Cast － in － place method would reduce the negative moment ，increase positive moment of the beam and make the shear of mid － span increase，the shear of side span reduce．

Research conclusions:From the analysis it is concluded (1) For the continuous rigid frame bridge，the plastic hinges region is on the top or bottom of frame pier and where need to be strengthened． (2) Under the seismic reaction，the plastic hinges happen to this bridge，but they keep certain away from the damaged displacement． (3) The Yili River Bridge has enough ductility and it can not fall under the serious earthquake．

Research conclusions:Through comparison and analysis，as for lining structure，the beam － spring mode should be adopted in stress analysis． The load direction of groundwater pressure should align with tunnel radius，reaction force at the arch bottom should be determined through the comparison between buoyancy and the vertical total load ，and the interaction between ground and segment should be modeled by radial and tangential springs． Furthermore ，the dimension of sealing gasket in segment joints should be determined by numerical simulation ，the release coefficient of ground stress can be adopted to simulate the disturbance of surrounding formation due to tunneling ，and the control of the upward movement of tunnel lining should be realized by the minimum shield stress of grout．

Research conclusions:A proper earthing scheme should be adopted for the traction substation in consideration of local conditions． The earthing resistance of the substation may be increased to some extent upon verifying the contact potential and step potential． On the basis of this，different resistance reducing measures can be adopted for saving investment of the project under the premise of ensuring equipment and personnel safety．

Research conclusions: Traction substation feeder fault judge equipment can measure and judge the fault types (permanent failure or transient failure) automaticlly． According to measurements of selective blocking on the auto － recloser automatics ，avoid the blindness of the automatic reclosing action when the catenary with permanent fault．

Research conclusions:(1) A constant speed controller based on double － hysteretic band adjustment is designed in order that the EMU can stably run at any speed ranging from 0 to 250km / h． (2) The simulation system can realize the energy feedback and control of the unity power factor when the EMU is in the regenerating braking state ，and the system can give the regenerative braking order again according to the characteristic curve to meet the running demand of high － speed EMU．

Research conclusions:(1)The possibility of the intermodulation interferences of the public GSM system on the GSM －R system is high． (2)The frequency planning of public GSM system alone railway shall be planned according to the used frequency of GSM － R system，so that the GSM － R system will not interfered by GSM system and safety of railway operation can be ensured． (3)When the business enterprise adjusts and optimizes the GSM － R network being along the railway，it is necessary to know the frequency points for GSM － R for optimizing to avoid the interference on the GSM － R system．

Research conclusions:(1) When the study is done on leading passenger dedicated line into an existing terminal，the layout of existing railway terminal，the planning for the passenger transport system in the terminal and main traveling directions of passenger flow shall be taken into account to choose the reasonable leading － in route and make full use of the existing route as much as possible for reducing separation of the city． (2 ) Based on the analysis of the general planning of the Harbin terminal，the engineering and technical conditions and engineering implementation difficulty as well as the coordination with urban planning ，it is recommended to lead the Harbin － Mudanjiang Passenger Dedicated Line into Harbin West Station along the existing route after making the demonstration in many ways and aspects and the economic comparison and selection．

Research conclusions:(1) Although the top beam moments of arch system are much smaller than that of frame system， the concrete structure is still not capable enough for the main beams． (2) Large tension axial forces are caused in beams by large span of beams，different distance of columns and absence of most of the top plate under the shell． (3) The section of the arch is designed as plat top and arch bottom to support the shell ，while its arch effect is weaken． (4) Consider the features of Yujiapu station，frame structure is more reasonable than arch structure．

Research conclusions:The combined capital repair and shed repair system was adopted for the linear motor vehicle． By using this system，the repair cycle extanded 30% compared with the repair system for the common wheel and rail vehicle． The main repair workshop was designed with capital and un － wheeling workshop as main part and the main maintenance workshops were all near the capital and un － wheeling workshop． The flexible design was made for the operation line for the wheel － set maintenance and it could meet the demand of repairing three types of wheel － set．

Research conclusions :(1) The flow line mode of the railway passenger station is changed into the "Through Type"． (2) The design of the underground entrance of the railway passenger station should shorten the transfer distance of the passenger as much as possible． (3) The flow line for the underground entrance into the station should consider the pre － remaining conditions and make reasonable use of the limited underground space of the railway passenger station．

Research conclusions:The studies show that using the " pile + plate" pretreatment approach along with the reinforced segment for this subway tunnel can effectively control the ground deformation． In the course of construction，the synchronous grouting is a key element． And its grouting volume should be more than usual by 0． 1 － 0． 2 m 3 and the second grouting should be conducted timely to guarantee safety of the ground buildings．

Research conclusions:According to the planned alignments of these three lines and the environment conditions around the Xujiapeng Transfer Station，it is proposed the " 工" shaped transfer mode should be adopted for the Xujiapeng Station． The river － crossing tunnel should be designed and constructed with the station at the same time to reduce the unnecessary repeated construction． The research presented in this paper can provide the reference to the similar works．

Research conclusions:The factors of the easy operation，optimization of the plane and vertical sections conditions， reduction of the traffic interference on the main track，improvement of the operation efficiencies of the train turning back and departing and arriving at the depot and reduction of the operation cost should be considered for selection of the track joining mode of the departure and arrival track． In addition，the factors of the depot site，the main track conditions，the station scale，the traffic conditions，the operational conditions and investment should be considered to select the reasonable track joining mode in the design of the urban rail transit． According to the layout of the station ，the train has the function of changing direction if possible． When selecting the track joining mode of the departure and arrival track ofthe depot，the factors of the regional plan and the social and economic benefits also should be considered to decide the most reasonable scheme．

Research conclusions:The vibration value of the place around the chip processing factory has exceeded the allowable vibration velocity for the foundation of the chip processing workshop because of the vibration induced by the container truck on the peripheral road． The similar vibration tests and monitoring for the existing Shanghai － Hangzhou Railway showed the vibration value of the ground 250 m away from the track was equivalent to the that of the chip processing factory when the passenger train met with the freight train and it exceeded the allowable vibration velocity． On consideration of that the building was built in the place about 500 m away from the railway，the study mainly demonstrated how to reduce the vibration level of the place 250 m far away from the railway to being equivalent to that of the place 500 m far away from railway． The study showed the anti － vibration measures were feasible．