基于混合法的加筋地基与条形基础沉降分析  

Analysis of settlement of strip footing resting on elastic reinforced soil with composite method

作　　者：施兴茂 刘朝伟 徐满清[3] 

机构地区：[1]江西诚达工程咨询监理有限公司,江西南昌330099 [2]鹰潭市水利电力局,江西鹰潭432100 [3]南昌工程学院土木工程系,江西南昌330029

出　　处：《南昌工程学院学报》2012年第3期59-63,共5页Journal of Nanchang Institute of Technology

基　　金：国家自然科学基金资助项目(50969007);江西省自然科学基金资助项目(20114BAB206012;20114BAB216010);中国博士后基金项目(20100480609);江西省教育厅科技项目(GJJ12629;GJJ11252)

摘　　要：采用有限元法与复合法,分析了加筋地基土体上条形基础沉降的平面应变问题.采用有限元法得到条形基础刚度矩阵,采用复合解析法,将加筋地基土体中加筋体处理为上部正交各向异性土层.利用该方法可得到条形基础的荷载—沉降变形.本方法计算程序编制简单,与文献结果比较,可验证本方法的正确性.数值计算结果表明,当加筋条层间距为L/6(L为条形基础底宽)时,条形基础中心点的沉降最小.A plane strain elastic interaction analysis of a strip footing resting on a reinforced soil bed has been made by using a combined analytical and finite element method （FEM）. In this approach the stiff- ness matrix for the footing has been obtained. For the reinforced soil bed, the stiffness matrix has been ob- tained using an analytical solution. The reinforced zone has been idealized as an equivalent orthotropic in- finite strip. The load deformation behaviors of the reinforced soil obtained using the above modeling has been compared with some available analytical results. Numerical results show that：for all the types of rein- forcement contlgurations considered, keeping the value of vertical spacing of reinforcements as L/6 （L is the width of footing） appears to be more beneficial since the maximum value of settlement reduction at the centre of the footing is observed.

关 键 词：复合法 加筋地基土 条形基础 沉降 

分 类 号：TU471[建筑科学—结构工程]