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通过对震害调查结果的分析,表明(1)震动液化能够引起水平地基产生较大的侧向变形;(2)可液化水平地基中桩的水平位移的大小和方向,主要受已液化土层侧向变形的大小和方向控制;(3)可液化水平地基的侧向变形,可分为液化前较小的震动变形。液化后震动引起的大中变形以及地震后的永久侧向变形三种情形。可液化水平地基中桩基础的设计,应该考虑这三种不同工作状态下的抗震要求;(4)上部结构-桩-地基的相互作用和响应会因上述三种情况而异,有必要发展新的能够考虑可液化地基侧向变形影响的动力分析方法。
Through the analysis of the survey results of earthquake damage, it shows that (1) the vibration liquefaction can cause large lateral deformation of the horizontal foundation; (2) the size and direction of the horizontal displacement of the pile in liquefiable horizontal ground are mainly affected by the liquefied soil layer Lateral deformation of the size and direction control; (3) liquefiable horizontal foundation of the lateral deformation, can be divided into small liquefaction before the vibration deformation. After liquefaction shock caused by large deformation and permanent deformation after the earthquake three cases. The design of pile foundations in liquefiable horizontal ground should consider the seismic requirements under these three different working conditions; (4) The interaction and response of superstructure-pile-foundation may be different depending on the above three situations and it is necessary to develop new The dynamic analysis method can consider the lateral deformation of liquefiable foundation.