节理岩体卸荷各向异性非线性力学特性研究

项目名称： 节理岩体卸荷各向异性非线性力学特性研究

项目编号： No.51279091

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 水利工程

项目作者： 李建林

作者单位： 三峡大学

项目金额： 82万元

中文摘要： 工程中的岩体由于受节理裂隙的切割，一般为非均质体，其展现出来的力学特性应该是各向异性的。实际上，由于岩体各向异性特性认识的复杂性，一般是按均质体来考虑的，显然，这种做法与实际是有很大差别的。因此，研究岩体的各向异性力学特性，保证岩体工程的稳定性是十分必要的。本项目就是从事节理岩体在卸荷条件下各向异性力学特性研究，即研究含节理岩体在卸荷条件下的非线性特性、各向异性变化规律、力学特征、力学参数及力学模型。掌握这类岩体的力学特性，尤其是岩体在卸荷条件下的各向异性非线性力学特性及其力学参数，是岩体力学和岩体稳定性研究不可缺少的重要基础，也是解决工程实际问题的关键。本项目主要针对水利水电工程中的典型节理岩体，在不同的应力水平作用下，考虑多种不同的方向，以及多组节理的卸荷非线性力学特性，并在典型的水利水电工程中应用。开展节理岩体卸荷各向异性非线性力学特性研究具有重要的理论意义和应用价值。

中文关键词： 节理岩体；卸荷岩体力学；各向异性；室内试验；力学特性

英文摘要： The rock mass in engineering projects is generally non-homogeneous due to the cutting by joint fissures. It shows a mechanical property of anisotropy. In fact, considering about the complexity of this property, the rock mass is usually homogenized in the practice, which obviously leads to a great difference from the actual situations. Therefore, studying about the anisotropic property of rock mass is an effective way to ensure the stability of rock engineering. In this paper, we are committed to the research of anisotropy mechanical properties of jointed rock mass under the condition of unloading, that is, including the study of jointed rock mass ranging from the nonlinear characteristics, the variation rules of anisotropy, the mechanical characteristics, the mechanical parameters and models. All of these are the indispensable basis of the mechanics and stability researches, and also the key to solve practical problems. The project is aimed at a typical jointed rock mass in the hydropower engineer. We intend to learn about the unloading nonlinear characteristics and engineering applications of groups of joints from multiple directions under different horizontal stresses. It has important theoretical significance and application value to study the unloading anisotropy nonlinear characteristics of the jointed rock

英文关键词： jointed rock masses；unloading rock masses mechanics；anisotropy；laboratory test；mechanical characteristics