岩体隧洞三维快速建模及关键块体分析

是否合理考虑工程岩体结构面的特性是衡量建立数值模型计算结果的关键。本文提出利用3DMAX三维建模功能,建立岩体隧道三维数值模型,并引入到自主开发的GeoSMA-3D系统,充分挖掘GeoSMA-3D系统的非连续结构体搜索关键块体功能。成功实现3DMAX与GeoSMA-3D系统的接口,将所建立的几何模型可以准确和顺利的导入GeoSMA-3D系统。并利用GeoSMA-3D搜索节理岩体隧道中的关键块体,为工程后续施工和支护提供参考。算例表明,利用3DMAX建立工程隧道的空间几何模型,导入模拟系统后图象表征围岩块体分布情况,并搜索出相应的关键块,系统直接给出了关键块体的体积、方位等信息,对于类似和后续岩体隧道分析具有重要应用价值。

Rapid Spatial Modeling of Tunnel in Engineering Rock Mass and Key Blocks Analysis

It’s very important to consider the characteristic of structural planes of the engineering rock mass, which is a criterion to judge the modeling and simulation results. In this paper, we use 3DMAX to model the 3D numerical model of tunnel in rock mass, and transplant it into the self R&D GeoSMA-3D system, which will take full advantages of key blocks identification function in discontinued structure through GeoSMA-3D. We make a successful interface between 3DMAX and GeoSMA-3D. which can import the geometrical model into GeoSMA-3D system accurately and successfully, and then the key blocks in tunnel formed by structural planes are searched and this can provide an important reference for supporting and lining in subsequent construction. Through the example, the spatial geometrical model of tunnel is built and modeled to analyze the key blocks stability, importing it into GeoSMA-3D and to characterize the distribution of rock blocks in visual method, identifying the key blocks. The system can give a result of volume and position of key blocks, and then take some support measures through designing work before excavation in case of blocks sliding, in this way the construction safety is guaranteed, so it is of great value for the subsequent construction and similar engineering.