论文部分内容阅读
由于斜坡岩体所受的应力场在空间上具有分区性,导致相同岩性与结构特征的岩体其强度参数是不同的。研究斜坡变形演化过程中应力场的空间分布特征,揭示斜坡演化过程对岩体强度参数的影响,对斜坡岩体稳定性评价与优化设计起着举足轻重的作用。以北盘江善泥坡水电站上坝址岩体为例,在工程地质岩组划分的基础上,利用Hoek-Brown强度准则初步估算各岩组强度参数;恢复斜坡的原始地形并建立相应的数学力学模型,根据斜坡不同时期的变形演化特点,应用FLAC3D软件模拟斜坡岩体变形演化过程中应力场的空间分布特点,以此为基础进一步划分上述岩组,最后根据岩体所受的真实应力与Hoek-brown准则估算新分组后的斜坡岩体强度参数,得出更加符合实际情况的强度参数。
As the stress field of the slope rock mass is spatially partitioned, the strength parameters of the rock mass with the same lithology and structural characteristics are different. Studying the spatial distribution of stress field during the evolution of slope deformation reveals the influence of slope evolution on the strength parameters of rock mass and plays an important role in the stability evaluation and optimum design of slope rock mass. Taking the rock mass of the dam site at the Niaoshan Shanbo slope in Beijiangshan as an example, the Hoek-Brown intensity criterion is used to estimate the strength parameters of each rock group on the basis of the division of the engineering geological rock group. The original terrain of the slope is restored and corresponding mathematics According to the characteristics of deformation and deformation in different periods of slope, FLAC3D software is used to simulate the spatial distribution of stress field in the process of deformation and evolution of slope rock mass. Based on this, the above group of rocks is further divided. Based on the real stress and Hoek-brown criterion is used to estimate the strength of slope rock mass after the new grouping, and the strength parameters that are more realistic are obtained.