基于GeoSMA-3D隧道建模及断层的影响分析  

Tunnel Modeling Based on GeoSMA-3D and an Analysis of the Effects of Faults

作　　者：梁燕[1,2] 姜磊[1] 冯志平[1] 王述红[1,2] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《现代隧道技术》2013年第1期92-97,共6页Modern Tunnelling Technology

基　　金：国家自然科学基金(51179031,51074042);国家自然科学基金外国青年学者研究基金(51250110531);国家重点基础研究发展规划项目(973计划项目2013CB227902);地质灾害防治与地质环境保护国家重点实验室(SKLGP2012K009);深部岩土力学与地下工程国家重点实验室(SKLGDUEK1009).

摘　　要：隧道周围的断层对隧道的稳定性有很大的影响,应用数值方法分析断层的影响机理,对于隧道工程具有重要的意义。首先,针对隧道岩体的非连续性问题,应用自主开发的GeoSMA-3D系统,采用非连续面网络图模拟真实岩体的几何特征,建立非连续岩体隧道的三维分析模型,根据建立的三维模型确定岩体内部结构面的分步特征;然后,将数值模型导入非连续程序(DDA)中,应用DDA程序对隧道的破坏过程进行动态模拟分析,并且改变断层的倾角分别模拟隧道的破坏过程。破坏结果分析表明,断层倾角对隧道的稳定性影响很大。研究结果对隧道工程的设计和施工有一定的指导意义。The stability of a tunnel is often affected greatly by its surrounding faults, and it is important to analyze the relevant mechanisms using numerical methods. Regarding the non-continuity of the rock mass, the geometric charac- teristics of real rock were simulated by means of a discontinuous network diagram using the GeoSMA-3D program. A three-dimensional tunnel model was set up in which the distribution character of the structural plane within the rock mass could be understood. Then, the numerical model was imported into a DDA program, which was applied to make a dynamic analysis and simulation of the destruction process of the tunnel. Meanwhile, the dip angle was altered and the failure process was simulated, and the results show that the stability of a tunnel is greatly affected by the dip angle of the faults.

关 键 词：断层 岩体 隧道工程 GeoSMA-3D程序 DDA 模拟分析 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]