水平掏土纠偏沉降计算及非线性有限元分析  

Settlement Calculation and Nonlinear Finite Element Analysis of Tilt Buildings Under Horizontal Excavation Correction Method

作　　者：潘磊 刘廷滨[2] 张家玮[2] 王作伟 王伟明 Pan Lei;Liu Tingbin;Zhang Jiawei;Wang Zuowei;Wang Weiming(Civil Engineering of Lanzhou Jiaotong University, 730070, China;Key Laboratory of Road ＆ Bridges and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, 730070, China)

机构地区：[1]兰州交通大学土木工程学院,730070 [2]兰州交通大学甘肃省道路桥梁与地下工程重点实验室,730070

出　　处：《特种结构》2018年第3期89-96,共8页Special Structures

基　　金：国家自然基金项目(51368035);甘肃省住房和城乡建设厅科技攻关项目(JK2014-16)

摘　　要：为研究水平掏土法纠偏的沉降变化规律及给出的沉降计算公式求解值与实际沉降量的差异性,本文对影响掏土纠偏的不同孔径、孔距及孔进深3种主要影响因素进行研究。利用ANSYS有限元分析软件对均布荷载作用下的地基土进行非线性有限元分析。计算主要得出：不同孔径、孔距及孔进深3种影响因素下的沉降变化规律。在给出了修正沉降计算公式后,又拟合得到不同影响因素下修正系数β,并将计算公式求解值与工程案例实测值对比分析。计算值比实测值稍大,说明计算公式有其合理性且能保证建筑纠偏的安全性。To investigate the settlement induced by excavation tilt correction method and explain the deviation of the calculated settlement and measured settlement, three major influencing factors including hole size,spacing and depth were studied in this paper. Using finite element analysis software ANSYS, nonlinear finite element analysis of foundation soil under uniform load was performed. The relationship between the settlement and those three factors were obtained. After the modified settlement formula was given, the correction coefficient,,under different influencing factors was also provided by fitting analysis. Comparing with measured settlement,the calculated settlement was slightly greater. This study assure the rationality of the formula and the excavation tilt correction method.

关 键 词：掏土纠偏 非线性 拟合 修正系数 

分 类 号：TU746.3[建筑科学—建筑技术科学]