Research conclusions:(1)Based on the existing general speed railway，high-speed railway，passenger dedicated line，according to passenger and freight transportation need，foreign railway transportation channel fluency would be realized. ( 2)Make full use of existing rapid railway，the inter-city railway would be formed with the area's economic and social development planning，which primary and secondary is clear, and maximum to link the main passenger distribution point within the region.(3)Considered the coordinated development of trunk，branch line，hub and station，the railway should maintain organic link with the city track traffic and other modes of transport:(4)The results of research may provide guidance of railway layout and regional comprehensive transportation development for coastal area，city group，but also provide reference for relevant functional departments to make decisions.

Research conclusions:From the study on the planning layout of the railway freight stations in the Inner Mongolia Autonomous Region，it is concluded:(1)193 railway freight stations and 321 cargo-loading spots and special lines should be built to respectively transport the goods of 752. 95 million tons in 2015 and 968. 43 million tons in 2020， respectively accounting for 76. 96% and 82.5% of the total transportation volume of the autonomous region.(2)The coal，chemical products and other bulk materials will be transported collectively for enhancing the intensive degree of goods transportation.(3)This study result can be used for the railway cargo-loading spot，the logistics park planning, site selection and construction fields.

Research conclusions : To the scheme for leading the Chengdu-Guiyang Passenger Dedicated Line，the following points should be paid attention to:(1)The analysis and research should be made and done in accordance with the thoughts of "asking the questions，analyzing the problem and solving the problems". According to the principle of"straightening the passage，deepening the passenger traffic into the city proper and separating the passenger and freight traffic"，the new railway should be led into the existing station to make full use of the existing railway lines and relative facilities and facilitate the management.(2)Furthermore，on consideration of the new channel and the corresponding site，the to the point of line selection method should be used for determining the main station sites and then determining the appropriate railway line direction.(3)The schemes should be compared in attraction of passenger flow，convergence of city planning and project investment to determine the general layout scheme. ( 4 ) This research results can be used for determining the general scheme for leading the new railway line into the city or transportation terminal.

Research conclusions:(1)In the upgrading projects of existing railway，the existing railway is often unable to meet the demands of transportation due to its low standards, small transportation capacity and slow running speed. ( 2 ) Based on the idea of"capacity expansion by upgrading the existing line→capacity expansion and upgrading by building the second line→capacity expansion and upgrading by building the new double-track line"，the systematic study was done on this project. Combined with the features of the topographical conditions，geological conditions and urban planning along the railway，an reconstruction plan suitable for the convenient transportation organization，coordination of the capacities between lines and stations and getting the good economic benefits and strong market competitive capacity was selected after making an economical and technical comparison.(3)This study results is also available for the other projects of upgrading of existing railway.

Research conclusions :(1)The HPF transform and wavelet transform are good in spectral fidelity and texture clarity and they can be used as the preferred data fusion methods for interpretation of the remote sensing image for the engineering geology. ( 2 ) Based on the HPF transform result, the information about the fault and unfavorable geological conditions can be interpreted with the accuracy rate above 80 percent. The interpretation accuracy for the unfavorable geological conditions can be improved by using the preferred fusion algorithm.(3)Because of the differences in terms of the data source，time and region，the effect of the fusion algorithms should be evaluated and selected before the image interpretation. ( 4 ) This study result can be used for the evaluation and selection of the fusion algorithms.

Research conclusions:(1)The landslides are usually of large scales with the obvious landslide characteristics and clear landslide elements. The landslide back wall are usually long and the surrounding boundaries are regulated by the combined cutting joints. (2)The landslide shape is related to the included angle between sliding direction and bedding rock tendency.(3)The geological alignment of the railway in this section should comprehensively consider the engineering situations in the section，and the principle of the”passing round first and then engineering treatment" should be followed. So the railway should be preferentially built in the right bank of the Qingjiang River to keep the railway away from the consequent slope. If the railway has to be built in the left band of the river, the best scheme with the least investment should be adopted.(4)The research results presented in this paper can be used for the railway alignment in the area with similar geological conditions to avoid the economic waste and construction risk due to the change of the schemes in later stage.

Research conclusions:(1)The control of the regional geological structure on the distribution of the soft soil represents: Firstly，the neotectonics movement is the essential cause of forming for the soft soil. Secondly，the regional fault structure controls the distribution of soft soil in fault basin.(2)The soft soil in this fault basin has eight characteristics. These characteristics include the high natural water content，big crude void rate，strong compressibility，good plasticity， low intensity，low consolidating coefficient，low water permeability and poor homogeneity.(3)The railway alignment in the area of thick soft soil should pass round the area of deep and thick soft soil area based on considering the investment. The alignment principle should be determined on the basis of fully researching the influence of regional structure on the distribution of soft soil. (4)The research result is available for the engineering geological investigation for the railway in the active faults area in the northwest region and in the soft soil developing area.

Research conclusions:(1)The depth of liquefaction is 20 m below ground(including 7 degrees range).(2)The formula presented in the Code for Seismic Design of Buildings(GB 50011-2010)can be used as the liquefaction formula.(3)The foundation liquefaction can be graded according to the Table 4. 3. 5 of the Code for Seismic Design of Buildings(GB 50011-2010).(4)This research results are available for revision of the relative codes and can be directly used in the bridge construction site with friction pile to be on the safe side.

Research conclusions:(1)With this method，two symmetrical oblique cement soil piles are simplified as two equivalent sheets. ( 2 ) The top and bottom forces of the sheet and the bending moment are obtained by calculation of the balance relationship.(3)The pile spacing is determined by the tensile strength of pile body.(4)The Row spacing is determined by the ratio of settlement reduction after the subgrade reinforced to the total settlement without reinforcement (the ratio of reducing subsidence difference)，and the reducing subsidence ratio of no bigger than 5 % of a row is regarded as the control standard.(5)The method is clear in concept，simple in calculation and easy to be mastered by engineering and technical personnels and has a wide applicable prospect in reinforcing the subgrade.

Research conclusions:(1)The collapse risk of the soil between piles can be effectively reduced by building a certain amount of anchor arms between the piles. The anchor arms can tightly connect the unstable soil between piles. The soil is compacted by soil arching for stabilizing the real soil. The compacted soil around the soil arching cycle plays a role of anchoring section.(2)The results of numerical analysis show that anchor should be arranged in the proper position with more density between the two adjacent cantilever piles because of the geometric influence of the soil arching effect between piles. This arrangement can produce a better reinforcement effect than the uniform arrangement.(3)The drilling depth of the pile anchor can be designed like this: the upper is shorter and the lower is properly longer, however, the drilling depth should not exceed 1 .5 times of the spacing between piles. If the lower part of the soil between piles is rather compacted，reduction of the drilling depth of the small anchor arm can be considered.(4)Most of reinforcing the soil between pile with anchor arm are used for further improving the stability of piles and soil and reducing the risk of road operation caused by the soil collapse and dropping between piles，or for beautifying the environment around the road.

Research conclusions:(1)The test result shows that the earth pressure moved up sharply when soil was submerged in water, if the water in soil is not drained in time，and the maximum value of earth pressure could increase up to 145 % compared with the original value in the test. The failure of the wall drainage system will increase the stress of retaining structure significantly, and may result in the moving out or overturning of the structures.(2)Under the normal circumstances，the pore water pressure will dissipates rapidly. However, if the drainage system fails to work，the water discharge time will cast longer. (3)Therefore，the existing retaining structures should pay attention to drainage- failure in engineering application.(4)The research results may be a guidance for designs and managements of retaining structures.

Research conclusions:(1)Using the Open GL to make the secondary development can successfully calculate the landslide stability and realize the dynamic simulation of the sliding process of the landslide according to the calculation results，with the simple，easy practical and scientific process. (2) If the Open GL is used for landslide，it can provide the Brat help for the landslide survey and design，the demonstration and the teaching simulation } and it can greatly improve the working efficiency and working level. (3 ) By using the 3D terrain model of the landslide spatial form and the 3D landslide section model,the functions of the mapping，storing and outputting of the topographic maps，sectional drawing and drilling data and connecting sliding surface etc can be realized，and it provides the rapid means for the stability evaluation and engineering design. (4) The trial calculation of engineering practice show in the same condition， the calculation result is in line with the result of the survey report. (5) This study result is available for the dynamic 3D visualization simulation and stability calculation of landslide.

Research conclusions:(1)The main technical standards for railway are the basic constraint conditions for the railway alignment and design. ( 2 ) It is scientific and reasonable to define the selection of main technical standards for railway as an issue of multiple-objective decision-making.(3)Based on the mufti-objective decision making model with the linear weighted sum method for selection of main technical standards for railway is a technically feasible ideas on overcoming the difficulty in the selection of main technical standards for railway based on the mufti-objective decision-making. (4)The technical route of the selection of major technical standard for railway based on the mufti- objective decision-making model is available for the high-speed railway，ordinary speed railway and freight railway.

Research conclusions:(1)The maximum normal stress of mid-span、distortion warping of the steel box girder fincreases with increase of diaphragm amount，when the box girder is narrow one with the aspect ratio of being approximately equal to 1 .5. In this case，the diaphragm plates of 3-5 ways should be installed in the span. ( 2 ) When the box girder is wide one with the aspect ratio of being approximately equal to 4. 5，the maximum normal stress of mid- span distortion warping of steel box girder decreases with increase of the diaphragmamount. In this case，the diaphragm plates of 9 ways should be installed in the span.(3)The results can provide the reference to the design of the same type bridge.

Research conclusions: The scheme of the maintenance vehicle presented in this pape is as follows:(1)The maintenance vehicle can travel in walk type by control of the electric plug pin device，with no operation by person on the chord member. The anti rolling device is installed between the the vehicle and the rail to enhance the construction safety and the travel safety. ( 2)The maintenance vehicle can cross the span because the walking wheel box is made in arch shape. In this way，the whole maintenance works can be done by one maintenance vehicle and the maintenance cost can be reduced.(3)The full and safe maintenance can be conducted to the side of the upper arch and web member because the light extension-type suspension cage is used as the side operating platform and the limit protection device is used for the truss. ( 4 ) The technical scheme presented in this paper can provide the reference to the similar works.

Research conclusions:(1)According to the special demands of the tight construction duration，the geological conditions of shallow buried stratum and depth of foundation pit，the cover-excavation consequent method was used for this project. ( 2 ) The steel lattice column，concrete filled steel tube column and reinforced concrete bored pile column were suitable for this tunnel project. The steel lattice column had the features of simple construction and easy waterproofing treatment for floor plate and low cost，but the vertical bearing capacity was relatively poor.(3)The concrete filled steel tube column had the features of the good bearing capacity and simple waterproofing treatment，but it required the high construction accuracy. ( 4 ) The reinforced concrete bored pile column had the features of the good bearing capacity and simple construction，but the waterproofing treatment was complex.(5)According to specific engineering conditions and construction technology level，the concrete filled steel tube column was used for this project. ( 6)The conclusions could be applied in the underground engineering with the cover-excavation consequent method.

Research conclusions:(1)For excavation of large underground cavern，the minimum plastic damaged area, the vault settlement and the convergence deformation of the side wall caused by excavation can be used as the criteria for judging the excavation scheme.(2)From the angle of reducing disturbance on the surrounding rock，the excavation scheme of cutting the exposure time of the final boundary of the cavern section，such as first excavation of the pilot tunnel and then excavation of whole section，is better than the excavation scheme of directly excavating the sectional profile.(3)For this project，the excavation scheme of excavation of multiple pilot tunnels is better than the traditional excavation scheme of excavation in layer. ( 4 ) This research result is available for the optimal selection of excavation scheme for excavation of section of the cavern.

Research conclusions:(1)Currently there are many global differences in research results，conclusions and viewpoints on biological effects of electromagnetic radiation; there are still uncertainties of the impact of electromagnetic radiation from high-speed railway on the human body, which needs long-term and in-depth exploration and research. (2) In general electromagnetic radiation from Wuhan-Guangzhou Passenger Line does not constitute prominent environmental impact ,but taking into account the emotions of anxieties and worries of the people along the line to electromagnetic radiation , the project construction company still makes its best efforts to take necessary protective measures to ensure that the health of residents around the sensitive facilities are not affected，and the people along the line whose TV reception may be affected receive reasonable compensation.(3)The mitigation measures include base station location optimization，housing function replacement and cost compensation，etc. (4) The research results of this paper will provide a reference for environmental impact assessment ( EIA) and preventive measures of the electromagnetic radiation from high-speed railway.

Research conclusions: (1)The storey-adding of the existing railway station is different from the reconstruction of civil architecture because the station operation，construction period and construction cost should be considered.(2)The reliability and seismic capacity of the existing building structure should be evaluated. According to the evaluation results，the reasonable service life and the standard for seismic design should be selected for determining the storey- adding scheme.(3)The seismic evaluation and reinforcement of the existing structure are crucial to the design and design study. ( 4)The scheme of building new structures was chosen and it avoided the large seismic reinforcement of the overhead structure and ensured the feasibility of the storey-adding project.

Research conclusions (1)In the intermediate station of the railway line for mixed passenger and freight traffic，two or three arrival and departure tracks should be built for the intermediate station without the 1 .25 m high platform to meet the conditions of the three intersection or turning off the train in bi-direction by using the lateral arrangement of station track.(2) When the 1 .25 m high platform is built in intermediate station，the reasonable number and position of the arrival and departure tracks and the reasonable station layout should be chosen on full consideration of the operation situation of the train with out-of-gauge goods and the train operation situation in the station.(3)The layout figures of the intermediate station of the railway line for mixed passenger and freight traffic presented in this paper presents can provide the reference to the design of the similar works.

Research conclusions: From the deep research on the research's background，concept and application of the energy saving slope，the design methods for the energy-saving profile are presented.(1)The reasonable slope length and slope of”V" type profile should used for the small interval between stations.(2)The single slope with first relief after steep should be used for the interval between adjacent stations with big gap in elevation.(3)The larger”W" type profile should be used for the large between stations.(4)In the underground engineering，especially for the track design with underground laying method， the profile design can be optimized by using this method to achieve the energy- saving purpose of longitudinal section.

Research conclusions: From the comparison and analysis it is concluded: (1)The annual generating capacity of the BIPV/T wall of the control center can be up to 128. 94 MWh.(2)The air-conditioning load for the BIPV/T wall of the control center can be much reduced by 4. 91 MWh in summer, dropping of 10. 21%.(3)The air-conditioning load for the BIPV/T wall of the control center can be reduced by 4. 48 MWh，dropping of 4. 15 %.(4)The heat production of the BIPV/T wall in winter can preheat the fresh air and it can effectively reduce the outdoor air heating load by 45. 18 MWh，dropping of 18. 11%.(5)This study result can provide the reference to the reasonable design and application of the BIPV/T technology for the special building like the control center of rail transit.

Research conclusions:(1)After finishing the upgrading of the Guangxi coast railways，the self-management and self- operation model will be conformed to laws and regulations，and it will be conducive to the realization of the mutual benefit and win-win to the investment side，conducive to the reforms of investment and financing systems and conductive to realization of the diversification for railway construction.(2)If the commissioned transportation and management will be adopted，the Guangxi Yanhai Railway Company Limited will gradually lose its long-term business and it is not conducive to carrying out the trade and logistics business supported by the transportation and control of the costs.(3)From the angles of realizing unified scheduling, safety and high efficiency of the regional railway network，it is possible to consider to trust some business of the Gunagxi coast railways to the national railway enterprise，such as dispatching command and device management of the Guangxi coastal high-speed railway. ( 4 ) The research results can provide the reference and guidance to selection of operational management mode and the sustainable development of the newly built and reconstructive joint venture railways.

Research conclusions:In combination with the characteristics of intercity railway，in this paper it is proposed that the financing model for intercity railway should be led by the government，along with using the market mechanisms and diversified financing methods and getting the support of the bank loans.(1)The financing model of land and property developments is the most effective way to make the public benefits of transport back to the construction of urban rail transit. ( 2)The local government bond is a good financing source for the infrastructure funding by the government. (3)The BT project financing is available for the financing for the non-operating infrastructure projects.(4)The medium-term note is the most potential financing way for intercity railway because it has the less restrictions compared with local bonds and corporate bonds. ( 5)The financing models presented in this paper can provide the reference to the financing for intercity railway，suburb railway，urban rail transit and other area.