Research conclusions: (1)The influence of tilted foundation rock on the subsidence of flexible strip foundation changes with the change of ground surface, the influence on central area of the foundation is the smallest. When the gradient of foundation rock is leas than 450，the influence on uneven subsidence by tilted foundation rock is notable.(2)The proposed values of subsidence influencing coefficient and uneven subsidence influencing coefficient under effects of tilted foundation rock can be used for calculation of the subsidence of flexible strip foundation for embankment and it also can be used for calculation of subsidence of the compacted soil on the bottom under vertical strip load of foundation rock. ( 3 ) The research on this field should be strengthened for keeping mistaken design of flexible foundation away because of neglecting the uneven subsidence of foundation caused by tilted foundation rock.

Research conclusions: A method for identification of Theological model and inversion of mechanical parameters was proposed. This proposed method is based on the theories of rock mechanics and on-site measurement, which can be as the bridge linking the theory with practice.

Research Conclusions: Basalt often contains soil, sand and clay, and sandstone and its thickness and location often change. The rock-fall generally happens on braes of counter-layer. The different locations of basalt in embankment produce different influence results; The more shallow under the road is, the more favorable for the slope stability is. The basalt under bridge foundation increases design complexity and if is around tunnel, the stability of tunnel wall can be enhanced.

Research conclusions: (1)The deep hole grouting along with large pipe roof construction method is feasible for dealing with geological disaster of fragmentary flows(slack )，which can compact and cement the rock to enhance the mechanic property and at the same time , the large pipe roof can form a bearing anchor along with rock. ( 2 ) The more attention should be paid to the sketch for the geological disaster area. ( 3 ) The more attention should be paid to the details of the construction techniques; The excavation length is not allowed to exceed the design length, the grouting-stopping wall on bottom should be designed of stepped gear type and the wall seam should be closured with concrete. ( 4 ) The more attention should be paid to drainage in disaster area. For draining the water, the methods of drainage and blocking can be used.

Research conclusions:(1)When horizontal earthquake happens, the integral structure will show notable seismic effect which should be taken into account in structure design. ( 2 ) The weight of the soil on the top of sideward opening of structure is the main reason for creating seismic effect, so it is necessary to reduce it by tilting the top plate in the sideward opening to enhance the capacity of seismic resistance.

Research conclusions: (1)The results show the group response relates to the characteristics of frequency dispersion under the effects of point load, that is the low frequency vibration wave is attenuated mare slowly than high frequency vibration wave and when the vibration frequency is close to the main ground frequency, the ground vibration becomes large. (2)In numerical calculation, Rayleigh damping can simulate the ground damping characteristics well and its parameters can be decided with calculation.

Research conclusions: (1)The relation between the change of difference in temperature and the structural transmutation is not linear. The higher the temperature is , the larger the change range of structural transmutation becomes. ( 2 ) The stresses in slab caused by difference in temperature on the rigid foundation are much bigger than that on the elastic foundation, but the slab's maximal difference in vertical displacement on the rigid foundation is less than that on the elastic foundation. ( 3 ) On the assumed condition of same lapse rate, the deformations in slab increase with the increase of the thickness and width of slab.

Research conclusions: The improved mathematical model is established on the base of slope-distance, horizontal direction and zenith angle as observations collected by free stationing of total station. The testing data shows that the model is effective and reliable and with this method the accuracy of track positioning can be greatly improved and the regularity of track can be enhanced, so the research result can be widely used in ballastless track adjustment.

Research conclusions: The application of curve parallel arrangement method in curve bridge, especially in small curve bridge reflects the bridge arrangement advantages of having overpass condition and ship passing requirement, but when application of the calculation mode of curve bridge parallel arrangement for the multiple-span small curve railway bridge, the bridge seam may exceed 30cm or be less than that of design, so it is necessary to adjust the seam according to the real situation. The experience and calculation process of Yongding River Bridge can be learnt for design of other curve bridge with curve parallel arrangement method.

Research results: In this paper , assembling centering structure of one extra-large stone arch bridge with 74 m height and 146 m span is introduced. Its superstructure is made切using military girder and the universal rods, and substructure is the timber arch cap. It is proved that the design for the steel-timber supporting frame is reasonable and applicable. The entire processes of building arch and removing arch accord with the design request, the engineering quality is pledged. This method can offer the readers important references of the all supporting frame for large type structures construction.

Research conclusions : (1)The tensile value and measured anchorage rebound volume made from the method presented in this paper satisfy the requirements of stressed steel bar for manufacture and tension. ( 2 ) When the tension comes to the end, the measured outcome of top anchor degree conforms to that of design, so this method can be used for calculation and measurement of prestressed tensile of steel strand.(3)When the steel strand is tensioned for several times, the tensile volume of each time should be accumulated and when calculation of the tensile volume, the working length of the jack should be subtracted.

Research conclusions: During the process of excavation of big foundation pit, the form of support for foundation pit can be flexible according to the construction conditions, and the order of the construction can be adjusted to make the construction method suitable for special construction conditions. The construction period with SMW method is shorter than those with other methods, the waste soil to be transferred is less than that with underground continuous wall, SMW method is an optional method for construction of support for foundation pit with the features of low requirement of construction space, low construction cost.

Research conclusions: The water pressure of the karat tunnel relates to the basic elevation of drainage facilities on the up and bottom and their drainage capacity, so the water pressure can not be determined by deducting the coefficient. The water pressure has responds to the rainfall. The boosting test of the water pressure after drainage can reflect the karat geometrical figure. The design of secondary lining structure should be made according to the geological conditions, original water pressure and grouting effects.

Research conclusions:The result indicates that ground settlement would not change largely in the area of 40 meters behind the cutting face along the tunnel axial, and when the ground loss rate is less than 2. 0%，ground settlement induced by soil plastic deformation is of small percentage to the total settlement value.

Research conclusions: (1) The theoretical formula of equivalent rigidity coefficients for tension, shearing and bending is , X referring to tension, shearing and bending. (2) The equivalent rigidity coefficient of the segment lining of the shield tunnel in a single subway on the longitudinal bending is 0. 05 obtained with FEM ( finite element method ).

Research conclusions: (1)The geological forecast in advance should be done to seek the location, feature, scale and connectivity to the sea of the fault zone for the construction. ( 2 ) Drapery grouting for reinforcing seabed tunnel is the key technique which is important to the success of the work. ( 3 ) Installation of waterproof gate as the last waterproof measure is the most important safe measure. (4) Working out the emergence scheme is very necessary for ensuring the safety of the tunnel construction.

Research conclusions: When the shield tunnel approaches to pile foundation of piers nearby, two-pile piers will incline in reverse direction if the distance between the shield and piers is less than the radius of tunnel, which will result in increase of the volumes of the secondary and synchronous grouting to some extent. In this case, reinforcing the soil between the shield and outside piles in advance is a safe and economic way.

Research conclusions: The following measures are adopted in order to ensure construction safety : the waterproof blanket is laid on the river bottom, the stratum water is dried by precipitation in advance, the bridge response is predicted with 3D seepage and stress coupled numerical analysis method, the tunnel reinforcing schemes are compared, and the space-time effect of bridge foundation is evaluated by 3D FEM. It shows after taking these measures, the max settlement of bridge foundation is 34. 7 mm, and the max differential settlement is 6. 2 mm. The construction practice proves this construction scheme is reliable and safe, which can provide the reference to similar construction.

Research conclusions : It is decided to use type A and B anti-stripping agents after doing the tests. When the blend ratio is 0. 4%，the adhesive of acidic stone with asphalt is the best, which can improve the asphalt concrete soil's capacity against water and stability at high temperature. The result of test in experimental section shows all property indexes satisfy the requirements.

Research conclusions: In the course of managing the strategy, it is necessary to make a summary of experience, study the present situation and predict future. The deep discussions are made on the knowledge on enterprise strategy, analyzing the enterprise resources and core capabilities so as to select the most scientific and practical strategy for getting rid of a one-sided approach and wrong decision-making, with which the Chinese construction enterprises' competition capacity can be improved over the world and the enterprise can make stable and sustainable development.

Research conclusions: Predicting the base-line traffic volume of the other traffic mode competing with the passenger dedicated line is the base of prediction of transfer traffic volume. General speaking, the base-line traffic volume is predicted with regression analysis method and extensive prediction method. The transfer traffic volume can be predicted by adopting time value model and the induced traffic volume can be predicted with the differential form of gravitation model. The predicted traffic volume of passenger dedicated line should be the sum of transfer traffic volume and induced traffic volume and based on which the density of the passenger flow in the different sections can be calculated, so this method can be used for prediction of traffic volume of passenger dedicated line.

Research conclusions: Construction of passenger dedicated line is a complicated construction with lots of think to do, it is necessary to make plan in advance. The construction organization design should be made well based on the main technical characteristics for passenger dedicated line and following the principles of integration, optimization and modelization to avoid the blindness and confusion in construction, shorten construction period, ensure safe and high qualified construction, improve efficiency and reduce costs.

Research conclusions: The scientific and technical information is modern enterprise's economic resources and unbodied wealth , and it can provide the supports to the construction technology and decision-making. For this reason, collection of scientific and technical information should have characteristics of reality, timeliness and applicability, its analysis should show flexibility, and transmission and utilization of the information should be quick in response with using the modern methods and means.