计及渗流影响的非均匀层状介质参数识别方法

The parameter identification for multi-layer rock under the act of both stress field and seepage

通过分析岩体结构中渗透压力与应力张量的关系 ,研究了岩体中渗流场的存在对岩体参数的影响 ,利用区域分解方法 ,提出了考虑岩体非均匀层状特性和计及渗流作用影响的岩体参数识别方法 ,分别进行了考虑渗流作用影响和不考虑渗流作用影响的参数识别计算 ,讨论了渗流作用对参数识别的影响 .研究表明 ,对承受高渗流压力的岩体 ,根据测量变形推断岩体特性时 ,应计入水压力的作用 .

Considering the influence of seepage pressure on the stress tensor in rock, a research was carried out on the rock parameter identification account for the seepage pressure. A method was presented to identify the parameters of the multi layer rock under the act of both stress field and seepage. The iterated equation and sensor matrixes were given. The numerical examples showed that the iteration method was convergence with different initial values of the rock parameters. A comparison calculation was performed to see the influence on parameters identification of rock by seepage pressure and the result showed that the existence of seepage should not be neglected in the parameter identification based on measured displacement.