Centrifugal model test on seismic response of colluvial landslide reinforced by cantilever anti-slide pile
TU Jiewen1，LIU Hongshuai2，TANG Aiping1，ZHENG Tong3
(1. School of Civil Engineering，Harbin Institute of Technology，Harbin，Heilongjiang 150090，China；2. National Earthquake Infrastructure Service，Beijing 100036，China；3. Institute of Engineering Mechanics，China Earthquake Administration，Harbin，Heilongjiang 150080，China)
Abstract：Centrifuge shaking table model test of colluvial landslide reinforced by cantilever anti-slide pile was designed and carried out on a centrifuge shaking table at 50 gravitational accelerations in order to research its seismic response，the distribution regularity of dynamic soil pressure after pile and dynamic bending moment of the anti-slide pile. During the processing of the model test，bedrock wave(Qingxi wave) was inputted from the bottom of the model by scaling the amplitude of the input seismic wave. The seismic performance of colluvial landslide reinforced by cantilever anti-slide pile under earthquakes of different intensities is studied by monitoring the acceleration response of landslide at different positions，the dynamic soil pressure after pile and the strain of the anti-slide pile. Results show that the acceleration response of landslide increases with the increasing height of landslide. The landslide shows an obvious elevation amplification effect，i.e.，the increasing rate of the peak ground acceleration(PGA) amplification coefficients becomes notably larger approaching the slope crest，and the acceleration response characteristic of the landslide surface shows the surface effect under earthquake. The dynamic response of the soil is restricted by anti-slide pile to a certain degree. The dynamic soil pressures after pile rapidly increase to peak value and then keep roughly stable along with the excitation of earthquake motion. And they will form dynamic soil pressures to act on the anti-slide pile. The maximum dynamic bending moment of the pile appears near the bedrock surface，which the distribution rule reflects the convex form. Both the dynamic soil pressure after pile and dynamic bending moment of the pile will increase with the increasing the strength of seismic wave. The results provide a good foundation for seismic design of the cantilever anti-slide pile.
涂杰文1，刘红帅2，汤爱平1，郑 桐3. 悬臂抗滑桩加固堆积型滑坡地震响应离心模型试验研究[J]. 岩石力学与工程学报, 2016, 35(S1): 2925-2934.
TU Jiewen1，LIU Hongshuai2，TANG Aiping1，ZHENG Tong3. Centrifugal model test on seismic response of colluvial landslide reinforced by cantilever anti-slide pile. , 2016, 35(S1): 2925-2934.
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2016, Vol. 35 
