一、前言在横向荷载作用下的桩土相互作用问题,长久以来,一直为工程研究人员所重视,并对此进行了大量的实验与分析研究。美国石油学会制定的API规范中推荐了p—y曲线法,但迄今为止,我国仅进行了少量的现场试验,尚无p—y曲线可资应用。水利工程和桥梁工程设计中通用的线性分析方法,是否符合实际及与非线性分析究竟差别多大一直是工程界关注 I. INTRODUCTION The problem of pile-soil interaction under lateral load has long been valued by engineering researchers and a great deal of experimental and analytical studies have been conducted on it. The p-y curve method was recommended in the API specification developed by the American Petroleum Institute, but so far only a small number of field tests have been conducted in our country. There is no p-y curve available yet. It is always concerned by the engineering field whether the linear analysis methods commonly used in water conservancy projects and bridge engineering design are in line with the actual and nonlinear analysis