摘要
基于弹性力学Mindlin解,假定隧道围岩为均质弹性体,给出了用于预测隧道施工引起地表变形的半解析法。该方法是采用三点勒让德-高斯求积法利用点荷载下的Mindlin位移解,推导了均质弹性地层中隧道开挖施工引起地表变形的半解析计算公式,可以模拟并预测隧道开挖面不同支护方式引起的地表变形。通过对地铁隧道工程的实例分析并与Verruijt方法计算出的地表变形比较分析,结果表明:用该方法计算出的地表变形预测值与实际沉降曲线较吻合,较用Verruijt方法计算出的结果更精确。
By assuming that tunnel surrounding rock is homogenous elastic solid,using the Mindlin solution in elasticity,derivation of an semi-analytical solution was presented to calculate ground deformation due to the excavation of tunnel.The solution is based on the three points Lgeneder-Guass measurement to integrate the form of Mindlin s equations at point load.Can simulate and predict the deformation under the different support pressure during the tunnel advancement.By compare to the ground deformation of the tunnel engineering case and the result of Verruijt method. The resuhs show that use the semianalytical solution to the engineering case the result of the ground deformation is closed to the actual settlement curve,and pressed than Verruijt.
出处
《公路工程》
2009年第5期79-82,共4页
Highway Engineering
关键词
半解析法
沉降
明德林方程
地表变形
隧道
semi-analytical solution method
settlement
mindlin solution
ground deformation
tunnel
