水工引水隧洞围岩稳定性有限元分析研究

Study on Finite Element Analysis of Water Tunnel Surrounding Rock Stability

水工引水隧洞施工过程中,常发生塌方、突涌水和岩爆等不良地质问题,直接对施工安全和工程进度造成严重影响。为准确预判围岩稳定性防止发生事故,施工开挖过程中围岩稳定性分析十分重要。文章结合工程实例,考虑多种地质条件和内水压力等因素,选取典型断面模拟隧洞在开挖和支护等多种工况下的应力变形计算分析,结论对指导引水隧洞围岩稳定性分析研究具有一定的指导价值。

It is often to cause some poor geological problems composed of collapse, water surging and rockburst etc. during the course of water tunnel construction, which will affect seriously the construction safety and project progress. In order to correctly judge the stability of surrounding rock to prevent against the accidents, it is very important to analyze the stability of surrounding rock during the course of construction excavation. Combined with the project case, various factors including geological conditions and internal water pressure were considered in this paper to select the typical sections for simulating the stress deformation calculation under different project situations during the course of tunnel excavation and support, it concluded that： it is of great significant for researching the surrounding rock stability of water tunnel.