含建筑桩基的顺层岩质边坡桩锚支护体系振动台模型试验研究OA北大核心CSTPCD

Based on Bockingham π theorem,a shaking table model test is carried out for the bedding rock slope with building pile foundation.Strain value of building pile foundation and the acceleration of the slope top,the seismic dynamic response of the system is studied base on the presstressed anchor cable.The results indicate that the strain of the anchor cable changes with the seismic wave,and the strain of the anchor cable reaches the maximum when the seismic wave reaches the peak,indicating that the upper cable force is larger than the lower.When the seismic amplitude increases,the upper anchor cable slips,and the anchoring effect decreases.The maximum strain of building pile foundation is located at a certain depth below the sliding surface,and the stress of building pile foundation far away from the slope is greater than that near the slope.The peak accelerations of slope top increase linearly with the seismic amplitude,but under the condition of Wenchuan-Wolong wave(0.55g)amplitude and Sin wave(0.4g)amplitude,there is a decreasing tendency among the peak acceleration at each point.With increase of seismic amplitude,the peak acceleration amplification coefficient of each point under Wenchuan and Sin earthquake does not change monotonously,but decreases first,and then increases.