摘要
本文在假设围岩服从三元件粘弹性模型和初始地应力场分量按线性规律分布的基础上,采用直接边界单元法,依据边界、域内位移量测信息和域内扰动应力量测信息,建立了可以同时反演确定三维初始地应力和弹性常数E_1,E_2,v以及粘性常数η_2的计算法。文中采用插值函数,考虑了在边界上量测点的任意设置问题。最后,给出了算例验证及工程应用实例。
Based on the assumptions of surrounding rock submitting to the behavior of three-element visco-elastic model and the initial earth stress field being linear, a method for three-dimensional back analysis of initial earth stresses, elastic constants E1, E2, v and viscous parameter η2 is established. The BEM is employed. Boundary convergence displacement values, internal relative displacement and disturbed stress values measured in situ are basic informations for back analysis. By using interpolation function, boundary planes could be divided into elements freely without considering places of measuring points along the boundary. Finally, a test example and a practical case study are given to verify the methed.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1991年第6期18-26,共9页
Chinese Journal of Geotechnical Engineering
