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对抗滑桩桩前存在开挖的情形进行了离心机振动台试验,输入的地震波为1940年5月18日加州Imperial Valley地震中在加州El Centro地区某个场地记录到的地面运动的南北分量,包括以相等的时间间隔为0.02秒的1559个数据点。由于振动台的峰值加速度不能精确控制,开挖时的最大加速度为0.38g。通过在模型桩上贴应变片的方式对抗滑桩的弯矩进行了量测,用激光测距仪对桩顶位移进行了监测。同时,通过埋设土压力计和加速度计,对桩前土压力和坡体不同标高的加速度进行了测量。模型制作时,桩底为固定。
The Centrifuge Shaking Table Test was conducted in the presence of excavation before the anti-slide pile. The input seismic wave is the north-south component of ground motion recorded at a site in El Centro, California, on May 18, 1940, in the Imperial Valley, California, Includes 1559 data points at equal time intervals of 0.02 seconds. Due to the shaker peak acceleration can not be precisely controlled, excavation maximum acceleration of 0.38g. The bending moment of anti-sliding pile was measured by applying strain gage to the model pile, and the displacement of pile top was monitored by laser range finder. At the same time, the earth pressure and the accelerometer were buried to measure the acceleration of the earth pressure and the different elevation of the slope. Model making, the bottom of the pile is fixed.