模拟高边坡初始地应力场的边界位移法

A NEW METHOD OF SIMULATING BNITIAL GROUND STRESS FEELD IN HIGH SLOPE

岩体初始地应力的确定是地下洞室、边坡等岩土工程设计和施工的必要条件。从实用的角度出发提出了分析岩石高边坡初始地应力场的一种分析方法——边界位移法,即根据地质构造特点,在边坡计算模型边界上施加远场位移,来模拟由地质构造运动形成的初始地应力场。应用实例结果表明:该方法能很好地模拟岩体的初始地应力场,并能为后续开挖过程的有限元分析,提供一种与初始地应力场等效且方便的加荷途径,具有良好的实用性;该方法还适用于弹塑性的岩体材料和多种岩体材料。

A New method of simulating the initial ground stress field in high slope is proposed in the paper. It is called the boundary displacement method. The boundary displacements are used to simulate the initial stress; it is suited to the feature of the geological formation. An example is indicated that the proposed method is in good accuracy to simulate the initial stress field. It is offered an equivalent loading path for the later analysis. It is found that the proposed method can be used to deal with the mulit-material and nonlinear rock materical.