The vibration loads will be produced between wheel and rail on the running of the high-speed Train. The vibration energy will be transferred to the ground formation through the rail, guiding bed and tunnel lining structure, thereby causing vibration between the formation and surface and environmental interference effect problems. Thus the research of related issues caused by the high-speed train vibration has the vital great significance. The train design speed of the Shiziyang shield tunnel for Guangzhou-Shenzhen-Hong Kong passenger dedicated line is up to 350km/h. In this paper the research object is located in the segment of the homogeneous formation of the Shiziyang shield tunnel. The analysis of this paper includes the dynamic response rules of the shield tunnel and formation under the single high-speed train loads and the law of the pore water pressure accumulation and dispersion under train cyclic loading.

The construction schemes of metro station driven with enlarging shield tunnels based on the shield tunnel in the upper and lower step method of artificial were first used in the dongshankou station of Guangzhou Metro Line VI and applied successfully in practice. This paper analyses and studies comprehensively the affection to the ground on the metro station driven with enlarging shield tunnels through numerical simulation. The study in this paper is mainly considered the ground settlement and movement when enlarging shield tunneling in the left tunnel. The ground settlement and movement up to a certain extent will affect the safety of the above adjacent buildings. This paper will provide some guidance to the application of this construction method in the future.

Root soil maximum static friction play as an important parameter to measure the effect of soil reinforcement.Accurate measurement of it has the higher application value and research significance. this paper takes the bamboo root bamboo developed as the researching object ,and uses a self-made device to simulate the condition of natural soil ,adopts the tension gauge measurement method to implement experiments. These experiments measure following factors: the maximum static friction of bamboo root -soil under the factors of the self weight stress, water content , depth, root depth, root diameter of different soil. Analyzes the impact of the above on root soil interface friction. The results show that: the maximum static friction of bamboo root -soil interface becomes higher with the increasing of soil depth and root depth. The relationship between maximum static friction and root diameter, soil depth is approximately power function .Under the same soil depth, In contrast to 32.7% moisture content of the soil, the maximum static friction of bamboo root -soil is greater when the moisture content of the soil is 23.5%

When it was leading prospecting in tunnel by TEM, the induced eddy current field would be produced on both side faces of a tunnel at the instant of disconnection of the excitation current. The receiver coil received the superposition of the eddy current field in the entire surrounding space, which was different from the superposition of eddy current field only with ground half-space. Using ANSYS computer program numerical simulated the propagation characteristic of transient electromagnetic fields in tunnel and compared the results on ground half-space with that in tunnel whole-space. The response curves were drawn by changing the depth of an abnormal body and the eigenfunction was obtained by fitting the curves. The results showed that the propagation in tunnel indicated “water wave effect” other than “smoking ring effect” on ground and the low conductivity body in tunnel changed the time-domain property of eddy current and displayed different curves.