一种适用于板桩与土体相互作用的p-y曲线折减方法  

A kind of reduction method of p-y curve applied to interaction between sheet pile and soil

作　　者：贝建忠 何成忠[1] 彭志豪[1] 陈章楷 BEI Jianzhong;HE Chengzhong;PENG Zhihao;CHEN Zhangkai(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2024年第8期263-269,共7页Port & Waterway Engineering

摘　　要：p-y曲线法可充分考虑土体的塑性变形及抗力极限值,但该方法是基于单桩水平静载试验提出的一种桩土弹簧计算方法,无法直接应用于板桩与土体的相互作用。通过引入p-y曲线折减系数,提出一种适用于板桩与土体相互作用的p-y曲线折减方法,将其结果与Plaxis有限元模型计算结果及现场位移观测结果进行对比,并验证该方法的准确性。结果表明,该方法可以充分考虑土弹簧的非线性及土体地基反力极限值,弥补了m法和p-y曲线方法的不足。The p-y curve method adequately considers soil plastic deformation and resistance limit values.However,this method is based on a pile-soil spring calculation approach derived from single-pile horizontal static load tests and cannot be directly applied to the interaction between sheet pile and soil.We propose a p-y curve reduction method suitable for the interaction between sheet pile and soil by introducing the p-y curve reduction coefficient,and compare the results to Plaxis finite element model results and on-site displacement observations to varify the accuracy of this method.The results show that this method can fully consider the nonlinearity of soil spring and the limit value of soil foundation counter-force,which makes up for the shortcomings of m method and p-y curve method.

关 键 词：板桩与土体相互作用 P-Y曲线 折减方法 被动土压力 极限抗力 塑性变形 

分 类 号：U656.112[交通运输工程—港口、海岸及近海工程]