Numberical Simulation Of Shaking Table Model Test Of The Slide-Resistant Pile

As a kind of effective retaining structure, slide-resistant pile has been widely used in the stabilization of landslide, but its design calculation method needs further research. Shaking table test can provide some data, however, be limited by tested time and condition, sometimes test data can not fully reflect the actual situation.Combing with "Test Study of Expansive Soil Cutting Retaining Structure in Strong Earthquake Region", this paper uses the numerical analysis software FLAC3D for numerical simulation of shaking table test model, then contrasts test data and the numerical data by calculating. Then actual models are compared and analyzed by changing the row spacing of double-row piles (change the upper pile's location) or landside mass shape.Based on te reference to relevant information and documents abroad and at home, firstly, the paper sums up the research status of the slide-resistant pile, and the theoretical research situation and calculation methods of the slide-resistant pile, it also gives a brief analysis on the difficulties and the problems exsited in its pratical implementation.Secondly, taking a double-row pile-sheet retaining wall on Yu-meng railway as the reference research object, the shaking talbe test model is numerical simulated to study and analyse the difference of the pile body's stess and displacement under different loading modes (static,0.1 gx,0.2gx,0.3gxz,0.4gxz) between the single-row pile-sheet structure and the double-row pile-sheet structure. Then numerical simulation results are compared with test results.Finally, based on the numerical simulation of the actual model, by changing the row spacing of double-row piles or landside mass shape, the paper analyses the difference of the pile body's stess and displacement under different loading modes (static, 0.1g,0.2g,0.3g, 0.4g) between different row spacing and landside mass shapes. Then it sums up the different bearing ratio between the upper pile's retaining force and the lower pile's retaining force to the total landslide thrust in the double-row pile structure with differen parameters.Through the research above, differences between the shaking table test results and the numerical simulation results are given and the reasons are summarized. Additionally, by changing the pile row spacing of double-row pile-sheet structure and landside mass shape, the difference of the pile body's stess under different circumstances is put forward, which can provide some references for the seisic design of slide-resistant pile.