含结构面岩体三轴压缩试验数值模拟研究.pdfVIP

第 36卷第4 期 矿 冶 工 程 V〇1.36 ^ 4 2016年 08月 MINING AND METALLURGICAL ENGINEERING August 2016 含结构面岩体三轴压缩试验数值模拟研究 贺建清U ，李 者U ，刘 毅2 ，高文华2 (1.水能资源利用关键技术湖南省重点实验室，湖 南 长 沙 410014; 2.湖南科技大学岩土工程稳定控制与健康监测省重点实验室，湖 南 湘 潭 411201) 摘 要 ：基于现行岩体力学试验方法，建立三轴压缩试验数值模型并辨识模型的可行性。以风滩水电站为背景，对含结构面的岩 体进行三轴压缩试验数值模拟，研究了岩体等效弹性模量各向异性的尺寸效应以及岩体结构面倾角、间距等因素对岩体等效弹性 模量的影响。采用此法模拟岩体三轴压缩试验求解岩体等效弹性模量，克服了承压板变形试验求解岩体等效弹性模量的理论缺 陷，避免了现场岩体三轴试验周期长、代价昂贵等不足，为求解含结构面岩体的宏观力学参数开辟了一条新的途径。 关键词：岩石力学；三轴压缩试验；数值模拟；等效弹性模量 中图分类号：TD315 文献标识码：A doi :10.3969/j .issn .0253-6099.2016.04.001 文章编号：0253-6099(2016)04-0001-04 Numerical Simulation of Tri-axial Compression Test for Rock Mass with Structural Plane HE Jian -qing1，2， LI Zhe1，2， LIU Y i2， GAO Wen -hua2 (1. Hunan Provincial Key Laboratory of Key Technology on Hydropower Development ，Changsha 410014，Hunan ，China ; 2.Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring ， Hunan University of Science and Technology， Xiangtan 411201，Hunan ，China ) Abstract ： Based on the existing rock mechanics testing method ， a numerical model lor tri-axial compression test was constructed and verified feasible . Then Fengtan hydropower station was taken as an example， numerical simulation ol tii-axial compression test was conducted lor the rock mass with structural plane， for investigating the impact on the equivalent elastic modulus of rock mass by factors， including dimension of anisotropy， dip of structural plane and distance between structural planes . This method was then used to simulate the tri-axial compression test of rock mass for solving the equivalent elastic modulus of rock mass ， showing it can overcome the t