地应力反演的迭代逼近法

An Iterative Approximation for Geostress Inversion

地应力是地下工程建设中的基本载荷,常采用多元线性回归方法进行反演,但该方法无法充分反映复杂应力状态下的岩体应力应变的非线性特征。为解决该问题,文章提出一种线性反演与迭代逼近相结合的方法通过引入迭代逼近的策略,能够有效反映岩体在基本地应力场组合荷载作用下的塑性行为,该方法可以更准确地反演出岩体初始地应力场的真实状态,提高反演的精度和可靠度,通过工程案例验证了该方法的有效性和实用性,可为地下工程设计和安全评估提供参考。

Ground stress is the basic load in underground engineering construction,and the multiple linear regression method is often used for inversion,but the essence of this method is the linear combination of different basic stress field components,which fails to reflect the nonlinear relationship of stress and strain in rock mass under complex stress states.In order to solve this problem,a method combining linear inversion and iterative approximation is proposed to improve the accuracy and reliability of inversion.By introducing the strategy of iterative approximation,we expect to deal with the plastic stage of finite element calculation effectively,so as to reveal the real state of the initial geostress field of rock mass more accurately.