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结合东北地区某隧道工程,根据获取到的隧道工程岩体结构现场原始数据,应用自主开发的GeoSMA-3D系统,基于简单块体模型间相互组合构建复杂岩体模型的原理,采用不连续面网络图模拟真实岩体的几何特征,对隧道围岩的岩体结构面进行三维空间模拟,建立了该岩体隧道工程三维数值模型,并采用一种基于网格划分的块体识别方法,获得结构面划分岩体得到的所有块体。将所建立的三维数值模型选取其中某一典型断面的数据信息,导入二维非连续分析程序DDA针对二维平面内的应力及位移进行计算分析,对隧道围岩的破坏过程进行动态分析,得到的动态位移图和模拟结果对隧道工程超前预报、开挖支护具有一定的借鉴意义。
Combined with a tunnel project in northeastern China, based on the obtained original data of rock mass structure in tunnel engineering, the principle of constructing complex rock mass model based on the combination of simple block models is established by using GeoSMA-3D system developed by ourselves. The discontinuous surface network The figure simulates the geometric characteristics of the real rock mass and simulates the three-dimensional space of the surrounding rock mass. The three-dimensional numerical model of the rock mass tunnel project is established. A block identification method based on grid is used to obtain the structure Divide all pieces of rock mass obtained. The three-dimensional numerical model is established to select the data of one of the typical sections. The two-dimensional discontinuous analysis program DDA is used to calculate and analyze the stress and displacement in the two-dimensional plane. The dynamic analysis of the failure process of the surrounding rock of the tunnel is carried out. The dynamic displacement diagram and simulation results have certain reference value for advanced prediction and excavation and support of tunnel engineering.