基于桩侧土压力的桥台桩基桩土相互作用研究  

Study on Interaction between Abutment Piles and Soil Based on Earth Pressure of the Pile Side

作　　者：张军辉[1] 周宇[1] 郑健龙[1] 李雪峰[2] 

机构地区：[1]长沙理工大学公路养护技术国家工程实验室,长沙410004 [2]东南大学交通学院,南京210096

出　　处：《路基工程》2014年第1期40-43,48,共5页Subgrade Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB411910);国家高技术研究发展计划(863计划)(2012AA112504);国家自然科学基金项目(51108048);交通运输部道路结构与材料行业重点实验室开放基金项目(kfj110202)

摘　　要：分别将桩的受荷模式作为被动桩和主动桩考虑,建立了路堤荷载下软基桥台桩基桩土相互作用的计算模式。以Ito法计算被动桩侧极限土压力,并将其作为桩所承受的被动荷载;将桩视为一维结构单元,利用p-y曲线法来考虑桩后土体的非线性及成层性,从而建立了桩身位移的计算方法。采用有限差分法求解,并与现场测试结果对比分析,验证了方法的合理性。Considering loading mode of pile as passive pile and active pile, the mode calculating pile soil interaction of soft-abutment under embankment load was established. By Ito method, the ultimate earth pressure of passive pile side was calculated and then taken as the passive load on the pile ; next, by regarding the pile as 1-D structural unit and using p-y curve method to consider about stratification and nonlinearity of the soil at the back of the pile, the method calculating the pile displacement was established, and then the solution was obtained by finite difference method. Through comparison with the result of field test and the analysis thereafter, the method was proved to be reasonable.

关 键 词：桥台桩基 被动桩 极限土压力 p—y曲线 有限差分法 

分 类 号：TU473.1[建筑科学—结构工程]