【摘要】 将土体非线性弹性卸荷损伤模型引入基坑工程的有限元分析中,建立非线性弹性卸荷损伤有限元方程,编制相应有限元程序,对上海外环隧道浦西连接井段的大型超深基坑工程进行有限元计算,并从基坑变形、围护墙上作用的土压力、损伤变量的发展演化等方面对有限元计算结果进行分析,计算结果表明了所建立的土体非线性弹性卸荷损伤模型在基坑工程中的可行性和适用性.更多还原

【Abstract】 A non-linear elastic unloading damage model of soil is introduced to finite element method analysis for excavation engineering.The non-linear elastic unloading damage FEM equation is proposed.A corresponding FEM program is compiled.The specially big and deep excavation engineering in Puxi,Outer Ring Tunnel Project of Shanghai is analyzed using this FEM program.The calculated results are studied from the aspects of excavation deformation,earth pressure on retaining wall,evolution of damage variables,etc.It has shown that the non-linear elastic unloading damage model of soil is feasible and applicable to deep excavation engineering.更多还原