摘要
以新七道梁隧道为工程背景,采用平面应变边界元BM P 90程序,将围岩简化成等效连续均质各向同性的线弹性介质,将锚喷支护提供的支护抗力看成边界元上的分布力,根据收敛值和拱顶下沉值推求等效弹性模量和侧压力系数。然后利用反分析得出结果,对围岩的应力与变形进行了分析。
On the basis of the actual project in the new Qidaoliang Tunnel, the surrounding rock is simplified to continuous isotropic elastic material and the resisting forces supplied by bolting and spray concrete are regarded as boundary element. According to the actually measured convergence and subsidence of vault, back analysis of measured displacements is made with the help of plane strain boundary element program BMP90. The side pressure coefficient for the initial strength and equivalent elastic modulus of the surrounding rock are determined. After that, the displacements and stress field are analyzed with the back analysis results.
出处
《公路》
北大核心
2006年第12期208-211,共4页
Highway
基金
兰州交通大学"青蓝"人才工程基金资助计划资助
甘肃省交通科技计划项目:复杂地质条件下深埋特长公路隧道修建关键技术研究--新七道梁隧道信息化施工技术研究
关键词
隧道
位移反分析
边界元
tunnel
back analysis of measured displacements
boundary element method.
