裂隙岩体三维柔度张量的数值试验方法

发布时间：2018-02-13 00:03

本文关键词： 三维柔度张量应力表征单元体积随机裂隙网络蒙特卡罗方法复合单元法　出处：《岩土力学》2015年12期 　论文类型：期刊论文

【摘要】：在裂隙岩体二维柔度张量数值试验的基础上,建立了裂隙岩体三维柔度张量及其表征单元体积(REV)尺度研究的简化数值试验方法。首先根据岩体裂隙的统计参数及分布规律,运用蒙特卡罗方法在研究域内获得与实际岩体裂隙同分布的三维随机裂隙网络,提取位于不同方位的岩体试件,运用二维柔度张量的数值试验方法求出各个平面方向上的二维柔度张量,然后根据二维与三维柔度张量的拓扑关系,用数学方法求解裂隙岩体的三维柔度张量。对于含3组正交全贯通裂隙的岩体,通过数值试验获得的柔度张量与理论解相比,其主对角线上各参数的误差在5%以内,表明该数值试验方法较为可靠。最后将此方法运用到小湾水电站工程中,确定左岸坝区裂隙岩体的应力REV为11 m×11 m×11 m,并获得该区域裂隙岩体的三维柔度张量。
[Abstract]:On the basis of the two-dimensional flexibility Zhang Liang numerical test of fractured rock mass, a simplified numerical test method is established for the study of the three-dimensional flexibility Zhang Liang and its characterization unit volume of fractured rock mass. Firstly, according to the statistical parameters and distribution law of rock mass fracture, a simplified numerical test method is established. Monte Carlo method is used to obtain the three-dimensional random fracture network with the same distribution as the actual rock fissure in the study domain, and the rock samples located in different directions are extracted. By using the numerical test method of Zhang Liang's two-dimensional flexibility, the two-dimensional flexibility Zhang Liang in each plane direction is obtained, and then according to the topological relationship between two-dimensional and three-dimensional compliance Zhang Liang, The mathematical method is used to solve the three-dimensional flexibility of fractured rock mass Zhang Liang. For the rock mass with three groups of orthogonal and fully penetrating fractures, compared with the theoretical solution, the error of each parameter on the main diagonal line is less than 5%, compared with the theoretical solution obtained by numerical test. It is shown that the numerical test method is more reliable. Finally, the stress REV of the fractured rock mass in the left bank dam area is determined to be 11 m 脳 11 m 脳 11 m, and the three-dimensional flexibility Zhang Liang of the fractured rock mass in the region is obtained by applying this method to the Xiaowan Hydropower Station project.
【作者单位】：武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金资助(No.51509191) 高等学校博士学科点专项科研基金(新教师类)(No.20130141120013)~~
【分类号】：TU45

【参考文献】