西北地区某市水利工程地下洞室围岩变形破坏研究

以西北地区某市水利工程地下洞室工程为例，依据洞室围岩位移监测资料，研究了地下洞室围岩变形破坏特点及其主要影响因素。研究结果认为地下洞室开挖后，顶拱围岩沉降量明显大于侧壁位移收敛量，并指出了影响区内地下洞室围岩变形破坏的主要因素表现在七个方面。该项研究将有助于进一步研究地下洞室围岩变形破坏机理，同时也有利于保障地下洞室工程顺利进行。

Study of deformation and failure of surrounding rockmass of underground excavation of hydraulic engineering in a city of Northwest China

By taking one hydraulic engineering underground excavation engineering project in Northwest China as an example and basing on displacement monitoring data of surrounding rockmass,it studied the deformation and failure properties and analyzed main influential factors to them.The studying results indicate that settlement quantity at the roof of underground excavation are especially more serious than those at both sides.At the same time,seven main influential factors concerned with deformation and failure of surrounding rockmass were put forward.The achieved results will be of great significance for the further study of deformation and failure mechanism of surrounding rockmass,meanwhile,they will also play a very important role in ensuring the progress in underground excavation engineering projects.