Research conclusions: (1) The appearance of the giant landslide in fluidity area reflected the features of the suddenness and the high － level and high － speed movement of gaint mud － stone flow．(2) The broken weathered granite rock mass and the unfavorable structural plane were the basic condition for landslide． (3) The effects of the heavy rainfall，loading and water softening along the steep under structural plane were the direct cause for the landslide．(4) After the landslide was rapidly gliding，the landslide disintegrated quickly and turned into mud － stone flow with water．Then the mud － stone flow constantly scoured the ditch bed to cause increasement of the water content gradually and quickly moved for about 4 kilometers．(5) The Qingshuiwan section of Hainan east ring railway and the eastern speedhway were located in the outside edge of the accumulating area of the mud － stone flow．When the mud － stone flow arrived at this place，its intensity was much weakened with less destroy degree．

Research conclusions: The contribution rates of landslide intensity of 10 provinces，including Sichuan，Chongqing，Hubei，Gansu，Shaanxi，shanxi，Guizhou，Hunan，Xizang，and Yunnan are high with distribution rate up to 60.1% of the total distribution rate，and they belong to the high intensity regions of landslides． The distribution rate of landslide of the another 11 provinces，including Liaoning，Xinjiang，Jiangxi，Jiangsu，Ningxia Heilongjiang，Tianjin，Jilin，Shandong，Hainan，and Shanghai are low with rate up to 13.4% of of total rate and they belong to the low intensityregions of landslides． After the study on the contribution rate of landslide intensity of each province in China，this paper presents an efficient classification of landslide intensity for providing the references to the construction programs and the landslide prevention．

Research conclusions:The results of the coefficient of horizontal consolidation were compared with CPTU dissipation tests data and laboratory odometer tests data． Comparisons of the results indicated that the coefficients of horizontal consolidation determined by DMTA tests and CPTU tests were very close． The correlation was good between the coefficient of horizontal consolidation determined by tests and CPTU tests in homogeneous soil，but it was poor in non－homogeneous soil．The coefficient of horizontal consolidation from laboratory odometer tests was smaller than those obtained by DMTA and CPTU test，and it was the same as that reported by other researchers．

Research conclusions:The experiment shows application of DCMP in treating the same soft soil subgrade as in the experimental section can meet the requirement of post － construction settlement for 5centimeters in a short period．The stress and differential settlement of composite foundation can be adjusted by gravel mat and geogrid． The pile body does not penetrate into embankment with the gravel mat and geogrid under it． With gravel and geogrid，the goal of homogenizing the stress and adjusting differential deformation can be achieved． The analysis of tested settlement show the rate of consolidation of the DCMP composite foundation is faster than the natural foundation．

Research conclusions:Based on the concept of the interactive software design，an object － oriented model was established for design of the subgrade’s cross section to have the subgrade’s cross section made to order． According to the design process of the cross section based on message － driven，the logic relationships among the various designed entities were concentratedly managed by their AcDbObjectId pointer in the cross section model． In order to design the huge sections in similar environmental conditions，the piecewise parameterization method was adopted． The user could draft and edit the graphics by elastic － effects dragging because the graphic entity＇s pinch point functions were reloaded．The users could define the design drawing by theirselves because the entity＇s drawing functions were extended． This system could real － time response the user＇s design operation． The design parameters could be modified by editing graphics directly for strengthening the user experience． Moreover，the system could cope with the a large number of batching designs and particular customized design． Finally，the real － time interactive CAD was established for the subgrade’s cross section based on graphics － data interactive driven．

Research conclusions:The warped reinforced earth － retaining wall is better than the ordinary earth － retaining wall in seismic property because the wrapped effect can make seismic wave weak during the propagation and amplification of the seismic wave along the wall up．When in 0.4 g and 0.616 g ，the model produced the evident seismic fall，and cracks happened in the junctions between the wall panel and the reinforced soil and between the reinforced soil and the unreinforced soil．In the peak acceleration，the potential fracture surface of these two kinds of experimental models were distributed in the same position，approximate to 0.45 H vertical line． But in the " Code for Design of Retaining Structure of Railway Subgrade" (TB 10025—2006) ，the potential fracture surface is approximate to 0.3 H vertical line and it slants to unsafety．So the reinforcing length should be increased in design． From the theoretical calculation and the analysis results of the internal and external stability of the reinforced earth － retaining wall obtained by the test data calculation，it was seen the coefficient of sliding resistance，the coefficient of capsizing resistance，the coefficient of uplifting resistance of the whole wall and the coefficient of uplifting resistance of the geogrid in various layers obtained by theoretical calculation were larger than the test data calculation． This showed the current code was unsafe and could be properly modified．

Research conclusions:( 1 ) Basing on hierarchy analysis method execute macro － trend line options，needing fully analysis and demonstration of the advantages and disadvantages and various economic and technical indicators，in order to reasonably establish judge matrix． ( 2) In the course of analyzing judge matrix and concluding relative importance and the comprehensive importance for every program，comprehensively compare the interrelation between all factors of each level to ensure scientism of the selection of optimal program． ( 3) Through argumentation about the example of macro －trend line options in Section of Anhui of Yuzhou － Bozhou － Suzhou Railway，fully demonstrating that the hierarchy analysis method could be applied to macro － trend line options and local program options and the research field of multi － objective decision making．

Research conclusions:(1) The reason for failure of laser glazing rail is the continuous extension of cracks induced by laser glazing in fatigue conditions．(2) The laser re － melting overlapping zone is the most sensitive area where the residual stresses promote crack formation and spreading．(3) The laser glazing rails must undergo a complete metallurgical evaluation to determine their integrity before installation on track．

Research conclusions:The erection by swing method is a good way for construction of the bridge above － crossing the busy existing railway．This method has the features of money － saving，practice，safety，reliability，cutting the influence of the construction on traffic and reducing the construction risk，and has a wide applicable prospecting． The design and construction of the swinged continuous beam presented in this paper can provide the important reference to the similar works，especially to the bridge design for passenger dedicated line．

Research conclusions:(1) From the finite element calculation of the stress range and fatigue of the stay cable under the different loads，it can seen the fatigue reliability of stay cable decreases to about 0． 8 under the live load of 120 t．(2) The influence of the overload vehicles on the bridge structure should be fully realized and it should be considered in design to improve safety and enhance the service life of bridge．

Research conclusions:According to the geological condition of the Yingwuzhou Yangtze River bridge，the study was done on the retaining structure． The application of " single row pile in breastwork on the pile top " in protecting the levee for the Pier 3 was the most economic and effective structural pattern． The construction practice showed application of the m method along with the computing method to calculate the bending moment，shearing force，deformation of the section of the fender pile body and the soil pressure on the pile side was scientific and reasonable，and with this method，the safety of pile could be ensured．

Research conclusions:There many factors to influence the prediction of the water bursting．However，the influencing factors can be basically divided into three type: the objective factors，human factors and space－time factors．The karst tunnel is very different from the non－karst tunnel due to its unique characteristics of groundwater． The calculation of the ground water with the dynamics of the laminar flow theory can be used for prediction of the water bursting volume of non －karst tunnel，but it is unavailable for the karst tunnel． The other method should be used for the karst tunnel according to the boundary condition of the tunnel． As the hazard of water bursting of the karst tunnels is big，it is necessary to pay more attention to reducing the influence of the construction on the natural environment by changing the ideas and insisting on the strategy of sustainable development．

Research conclusions:( 1) From this practice，it was seen when the water pressure of the main tunnel was controlled to below 0.2 MPa，the follow－up construction could be conducted．The introduction was given to the construction technology of grouting，the relative parameters for the grouting design，the grouting method and the inspection and evaluation of the grouting effect．(2) When the water leakage volume of one hole was between 1.8 ～ 2 L /min and the maximum total water discharge volume of the working face was controlled to 5 ～ 8 m3/ h，the tunnel excavation could be conducted．

Research conclusions:From the research on the individual fire protection of the Suzhou Taiping Car Depot，the following points were concluded: (1) The fire protection design of the platform above the Suzhou Taiping Car Depot should considers the general development，the development by the car depot and property development，and some measures should be taken to satisfy the fire protection requirements．(2) The fire protections for the car depot and the property development should be completely separated by using the independent fire control systems with sharing the information in the fire control center．(3) The emergency exits to outdoor or the second floor platform should be installed for high or large building with crowds of people and big risks in the car depot. (4) The second floor platform that meets the requirements of load－bearing，rescue and turning of the large fire engine can be served as an outdoor safety area．(5) The second floor platform can be served as the outdoor ground surface of the building on the second floor according to the current design code for fire protection．

Research conclusions:Based on the analysis of the layout of the landscape structure of the overhead contact system in the station of the high － speed railway and on the precise of ensuring the safety and reliability，the optimal schemes for the optimal support structure for the overhead contact system，installation of additional wire，selection of the compensation device and itssubsidiary facilities，interface layout of station building，optimization of the central anchor and color matching of the structure are presented from the areas of lightening the system，shielding some parts of the system and integration with the building structure to improve the overall landscape effect of the station and make the station landscape coordinated with the surrounding environment．This can provide the reference and basis to the similar works．

Research conclusions:(1) There is no essential conflict between the railway codes and building codes，and the reasonable design of the framed support rail structure can be realized by appropriate control of the prestressing degree of the prestressed support rail beam according the railway codes and the building codes．(2) The calculation should be made according to the bridge codes for control of the crack of the framed support rail beam．

Research conclusions:The analysis showed the internal force in the stratum caused by the tunnel construction was redistributed and this was the reason for the ground settlement． However，the train load had bigger influence on the ground settlement． The numerical calculation could provide the important basis for selection of the construction measures．If the grouting was conducted to the railway subgrade before construction or the grouting was conducted through the sleeve valve bedded on both sides of the subgrade，the settlement deformation could be controlled．

Research conclusions:The rapid，effective and reliable balance between the environment and shield construction parameters can be established by conducting the risk control of the whole process，including the beforehead control，matter control and subsequent control in the construction phrase． In the launching process of the shield machine，the monitoring points should be installed along the vertical axial cord position of tunnel according to the relative standards．During the tunneling of the shield machine，the tracing monitoring should be conducted and the dynamic analysis，the advanced alarm and the feedback should be conducted with the security alarm system for metro construction in order to provide the decision － making basis for adjusting the construction parameters of the launching tunneling section．

Research conclusions:From the research the following points can be seen: (1) The enforcement classification，enforcement subject and legislative authority for the safety of urban rail transit are presented．(2) The enforcement can be divided into three types，namely the engineering enforcement in the protection area，facility protection enforcement and operation order enforcement.(3)The ideal enforcement mode of taking the enforcement cost，the enforcement efficiency and the enforcement effect as the optimal evaluation indexes is given out．

Research conclusions:(1) When the length of Metro station is less than 200m，one step － down substation can meet the needs of power distribution，but for the station with narrow platform and being difficult to install the cable bridge or rack，two substations should be built．(2) When calculating the electrical load，the reasonable coefficient should be chosen for the intermittent load according to the operating mode，and some fire equipment loads should not be counted in the total computational load for the scientific choice of transformer capacity．

Research conclusions:The test results show that application of the time series analysis method can achieve the high precision of predicting the concrete slab deformation with the linear fitting correlation coefficients of more than 0.93 in all measuring points and the prediction error of less than 10% . So，this forecast model is available and can be used as an effective method for monitoring the lining structure of tunnel．