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采用离心机振动台试验的方法对抗滑桩桩前不存在开挖的情形进行了研究,输入的地震波为加州El Centro地区某个场地记录到的地面运动的南北分量,没开挖时的峰值加速度为0.37g。研究表明:在不开挖情况下,通过离心机振动台试验可知抗滑桩对周围土体响应有一定的加固和阻滞作用,桩顶位移随地震波的输入变大,抗滑桩各截面的弯矩和动土压力变化相似,最大值都出现桩的下部。
Centrifuge shaker test method was used to study the situation of excavation before anti-slide pile. The input seismic wave is the north-south component of ground motion recorded at a site in El Centro, California. The peak acceleration without excavation 0.37g. The research shows that under the condition of no excavation, the shaking table test of centrifuge shows that the anti-slide pile can reinforce and retard the response of surrounding soil. The displacement of pile top with the input of seismic waves becomes larger, The bending moment and earth pressure are similar, and the maximum value appears in the lower part of the pile.