桩筏基础的相互作用系数解法及参数分析  

An interaction factor approach and parametric analysis for piled raft foundation

作　　者：陈龙珠[1] 曹明[1] 陈胜立[1] 

机构地区：[1]上海交通大学土木工程系安全与防灾工程研究所,上海200240

出　　处：《岩土工程学报》2008年第2期155-159,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(50478022)

摘　　要：采用积分方程法推导出求解桩–桩、桩–土和土–土间相互作用系数所需要的第二类Fredholm积分方程,利用叠加原理对桩筏基础进行计算分析,通过与常规弹性理论方法计算结果的比较验证了本文方法的正确性。最后对桩筏基础的沉降、各桩以及土之间的荷载分担情况进行了一系列的参数分析。此方法可以用来分析大规模桩筏基础,具有较好的工程应用前景。By use of the method of integral equation, the second kind Fredholm＇s integral equation was deduced to solve the interaction factors of pile-pile, pile-soil and soil-soil. Using the principle of superposition, the piled raft foundation was calculated. The validity of the proposed method was verified through comparison with solutions obtained using other methods by existing theories of elasticity. Finally, a series of parametric analysis was made to study the settlement of piled raft foundation and the loads shared by the individual pile and subsoil. The proposed method could be readily used to analyze the large piled raft foundation.

关 键 词：桩筏基础 相互作用系数 荷载分担 沉降 

分 类 号：TU473[建筑科学—结构工程]