隧道围岩稳定性数值模拟研究现状与发展方向

由于隧道所处的特殊地质环境，如埋藏深、地应力高、温度高、渗透压高，存在各种节理、裂隙等不连续面等，这些因素对隧道围岩稳定性有重要的影响。与隧道围岩稳定性分析的解析方法和物理模拟实验方法相比，数值模拟分析方法精度高，具有良好的适应性、通用性和灵活性，已成为解决岩土工程问题有效的工具之一。文中介绍了有限元、边界元、离散元等数值模拟分析方法在隧道围岩稳定性中的应用情况，并指出了在数值模拟方面存在的问题。最后对隧道围岩稳定性数值模拟方法的未来发展方向进行了探讨。

Present Situation and Development Trend of Numerical Simulation of Stability of Surrounding Rocks in Tunnel

The geology environment of the tunnels is peculiar, for example deep buried depth, high ground stress, high temperature and high osmotic pressure. Moreover there are discontinuous planes, such as various joint and fissure. These factors have an important effect on the stability of surrounding rocks in tunnel. Compared with the-analytic method and physical simulation experiment method for analysis of the stability of surrounding rocks in tunnel, the numerical simulation analysis method has the advantages of high accuracy, fine adaptability, versatility and flexibility. The method has become one of the effective ways to resolve the geotechnical problems. The application of the numerical simulation methods in the stability analysis of surrounding rocks in tunnel, such as the finite element method, the boundary element method and the distinct element method are introduced. Some problems in the numerical simulation method are indicated. The developmental trend of the numerical simulation method of stability analysis of surrounding rocks in tunnel is discussed.