Research conclusions: This paper defines the tactical concepts on the development of real estate project and offers the SEM model for the tactical management of real estate project． The core element of the tactical management of real estate project is to determine the cause and effect relation between the orientation of the real estate project and the desiring prospects of the project，the macro environment，the competitors，the project features and the customers． Under the guidance of the desiring prospects of the project，the deep analyses of the macro environment，the competitors，the project features and the customers should be made to the real estate project so as to obtain the customers orientation，the production orientation and the images orientation． The tactical management of real estate project can offer the information support to the investment decision － making and working out the development tactics so as to reduce the uncertainty caused by the factors by men in the course of the investment decision － making and working out the development tactics and make the investment decision － making and the development tactics more fitting to the market demand and the competition environment for achieving the project success．

Research conclusions: In the phase of project preceding planning decision － making，the study on the project feasibility should be well done and based on the market investigation，determining the project construction standard and scale is the premise of better control of the project cost． In the phase of the project design，the attention should be paid to the roles of the government accreditation，design and cost engineer，and the value engineering method and rationed design should be widely used． Strengthening management of design revision is the effective way to control the projectcost．

Research conclusions: The " Standards for highway Engineering Quality Inspection and Evaluation" is more suitable for survey evaluation of the existing railway． Taking the evaluation of dynamic deformation modulus as an example，combined with the related standard of the railway，the minimum Evd control standard is 40 MPa which don＇t need reinfor cement． The road sections length that need reinforcement are reduced when using segment evaluation method，achieving good effect． According to the statistics data and segment results，the Evd value has a close relationship with filling type on the surface of roadbed． It is difficult to ensure large stiffness when using A and B types filling，so lime or cement improved soil should be used to get larger stiffness．

Research conclusions: When the freeway is needed to be constructed in coteau，it is necessary to do the research on the coordinated relation between the freeway construction in coteau and ecological environment． This paper analyzes the relation between transect arrangement of coteau freeway and ecological environment． The evaluation model is established with the objective and subjective synthetic approaches to determine the weights integrating the environment，society and economy factors for choosing the transect arrangement plan which benefits environment protection and economy to reduce the influence of the freeway construction in coteau on the ecological environment．

Research conclusions: The calculation model of monitoring subsidence affected directly the calculation results of ground subsidence． Based on the relation between the groundwater table，pore water pressure，ground load and ground subsidence，this model established with the regression analysis principle is suitable for monitoring the ground subsidence in urban areas and along transportation routes．

Research conclusions: ( 1) The change pressure affected the loess structure． The compaction arose by pressure made reduced the changeability of loess structure and the stability of structure increased． ( 2 ) The change water content affected the loess structure． The structural parameter reduced with the increasing of water content． At the same time，both have nearly relationship． The pressure was lower，the damage of loess structure is smaller． ( 3 ) Both of the pressure and water could cause the damage to the loess structure，but the damage level was different．

Research conclusions: The particle flow discrete element method can reasonably reproduce interior expansive soli and free expansion rate tests with the equilibrium swelling pressure method． From doing the single simulation test and multiple simulation tests to the expansive soil subgrade，the superficial zone slump phenomenon of the expensive soil subgrade under swelling － shrinkage cycle is revealed in the microscopic point of view． Contrasting the failure characteristics of the filled embankment shows the situation of numerical simulation almost tallies with the site situation．

Research conclusions: For the maximum instantaneous wind speed in the area where is 4 m high from the rail surface along the high － speed railway，the level distribution feature of the design value V4_2max of the maximum instantaneous wind speed biennially is basically the same as that of the design value V4_30max of the maximum average wind speed every thirty years． In this paper，it is proposed the design value V4_2 max of the maximum instantaneous wind speed biennially in any place where is 4 m high from the rail surface along the high － speed railway is the master control factor for determining the strong wind region，and the included angle ( β) between the line orientation and the main wind direction and the deflection angle ( smaller than 10° ) of the strong wind regions of the high － filling embarkment，the viaduct and the curved conduit of bridge must be gradually optimized． The strong wind ( gust) coefficient is calculated with the linear regression equation of least square method，getting good effect． Therefore，it proves the optimal scientificalness of the disaster prevention and distribution principle of the safety monitoring point in the strong wind region along the high － speed railway，and representativeness and reliability of the acquisition of data on the instantaneous wind speed and wind direction． It can provide the reference to optimizing the monitoring point distribution plan of the strong wind region along the high － speed railway in China and instituting the technical standard and criterion for the wind fence distribution．

Research conclusions: In the process of design and check，the temperature difference between the track bed slab and bed plate should be selected as different annual temperature difference according to actual situation of different regions．Application of small resistance fastenings on bridge would reduce the maximum additional longitudinal rail force and track structure stress obviously，but the creeping amount of fastening on the beam end of long － span bridge would be big and should be paid attention to． The high － elastic rubber pad should be installed around the positive stop groove． The isolation layer with friction coefficient should be installed between track bed slab and bed plate．

Research conclusions: ( 1) By taking the pile foundation and concrete supporting pier as vertical Load － carrying structure and taking the fine rolled twisted horizontal prestressed cable as comprehensive load － carrying system to offset horizontal thrust，it was ensured that the line shape inaccuracy of beam was within 1cm and the root of slant － leg had no crack during construction of massive concrete of V － shape pier and slant － leg． ( 2) By using a kind of one － end tensioned anchor box，the slant － leg could be tensioned without damage and it was unnecessary to build the working platform at the end of the pier． In addition，it was easy to do the tension work． In this way，the construction was more safe and faster，and the construction environment was better．

Research conclusions: The float tow and jack － in method is the innovation based on the traditional float toe method． It is different from the traditional float toe method in the power to make the girder longitudinal moving． Namely，it uses the jack － in device at the rear end of steel truss to substitute the traction device in the front of the steel truss，with the features of using simply equipments，easy operation，even velocity，smooth running and ensuring the security．

Research conclusions: The hydraulic fracturing method was used to analyze and evaluate the tendentiousness of the rock outburst of one tunnel according to the Russenes criterion，Turchaninov criterion，Hoek criterion and other criterions．The results showed that there was the possibility of rock outburst． The rational excavation method would be chosen and in the construction process，the necessary safety measures would be taken．

Research conclusions: ( 1) For the tunnel in oil and gas area，we should understand the characteristics of gas on the basis of area geology analysis． In that case，we can recognize the essence of gas flooding，master the mechanism of disaster coming and set down the prediction scheme． ( 2) Accurate geology analysis can establish the stable basis for TSP detection． ( 3) The operation in scene is strict． The detection and drilling construction are the necessary conditions for coming true the accurate prediction． ( 4) Combing the geology and geophysics is the basis of successful detection．

Research conclusions: ( 1) The rational support parameters should be chosen for construction of shallow double － arch tunnel with bias weak rock according to the field geological conditions． ( 2) The high － frequent monitoring measurement works must be done during construction of the tunnel under bad geological conditions to instruct the tunnel construction．( 3) The reasonable change of construction process can ensure the safety of the tunnel construction． ( 4) The anti － slide pile and back pressure refilling can effectively solve the bias problem of weak rock tunnel．

Research conclusions: When the current passes through the catenary wire，the electric and magnetic fields form the around the catenary wire，and the electric and magnetic fields produce magnetic effects on the near conductors of the traction electric network． The strength of the induction voltage caused by electrify is proportional with the voltage strength of electric wire and the induction voltage caused by magnetics is proportional with the strength of the traction current and parallel length while the total induction voltage is the vector sum of the two induction voltages．

Research conclusions: The results of numerical calculation and analysis with the magnetization theory for the ferro －resonance show the saturated exciting induction exists in the iron － core induction． The saturated exciting induction is the main cause for generating the ferro － resonance and the frequency of the ferro － resonance is decided by the saturated exciting induction and the circuit capacitance． The over － voltage of ferro － resonance is producted when the harmonic voltage excites the circuit consisiting of the saturated induction and the capacitance．

Research conclusions: This paper analyzes the role of intercity rail transit in promoting the regional economy from three aspects: optimizing the layout of urban spatial structure，integrating the transport networks in city group and promoting industrial development，proposes the basic intension of the coordinated development between rail transit and regional economy from four aspects: coordination in technology，coordination in benefit and coordination in system，and also analyzes the role of Changsha － Zhuzhou － Xiangtan intercity railway in promoting the economic development in this area according to planning and construction of this railway． The analysis result shows the intercity rail transit is not only the key transportation way between cities，but also it can promote the sustainable development of the regional economy．

Research conclusions: The simulation of the on excavation process of the deep foundation pit of Beidajie Metro Station of Line 2 of Xi＇an metrol was made with FLAC software to work out the monitoring plan of the deep foundation pit of the station． The analysis of the horizontal deformation of the retaining piles，the axial force changes of steel support，the change law of load bearing of the cables was made． The results showed that the displacement of pile directly reflected deformation characteristics of the retaining structure，while the steel support and cables obviously limited the deformation of foundation pit． The calculation results was basically in accordance with the monitoring results．

Research conclusions: The finite difference model was established on the base of the soil properties of Jiangji Section of Line 2 of Wuhan metro． The shield construction process of the start section was simulated by 6 steps． The vertical displacements after excavating 30 m of the right track were analyzed by sampling the different cross － section while the analysis was made for the difference between the numerical simulation result and the field monitored data about the start process to know the common points of them for providing the reference to the numerical calculation，engineering analysis and engineering prediction of the start section of shield construction．

Research conclusions: The fuzzy comprehensive evaluation model for subway safety performance presented in this paper was used in one subway to verify its performance． The evaluation results showed that the safety comprehensive performance of the subway was " safe "，and the fuzzy comprehensive evaluation method for the subway safety performance was of good practicability in timely finding the hidden fault in safety and giving assistance of working out the preventive measures for the safety．

Research conclusions: By taking the successful application of recuperative anchor in the Futian Hub project of Shenzhen metro as an example，this paper introdues the technical requirements and matters that need to pay attention to in application of recuperative anchor in a given project． From the long － term view，the application of recuperative anchor will not only considerably saves the production cost of enterprise，but also reduces the influence on the surrounding environment，saves energy and benefits the society．

Research conclusions: ( 1) For one － time pouring 18． 22 m CFST，the semi － self － compacting concrete or self －compacting concrete can be used． The artificial irrigation and high － frequency vibration must be conducted to the semi － self － compacting concrete in tube． ( 2) By selection of good raw materials of concrete，optimization of the match ratio and taking various quality assurance measures，the good liquidity stability of CFST can be ensured，therefore to ensure the CFST performance and quality． ( 3) In the site inspection for Nanjing South Station，the ultrasonic testing can accurately detect defects of CFST by sampling，so it can ensure CFST quality．