洞群 meaning in English

tunnels

Study main methods of construction survey in tunnels in xiaolangdi multi - purpose dam project
谈小浪底水利枢纽工程洞群施工测量主要技术方法
Excavation method for inclined shaft excavation in headrace tunnel at zipingpu water conservancy project
紫坪铺工程引水系统复杂地质条件下洞群进洞技术
Stability of the surrounding rock in underground cavities for the daliushu water control project on yellow river
黄河大柳树水利枢纽工程地下洞群围岩稳定性
Development and application of new technology for 3d geo - mechanics model test of large underground houses
三维模型试验新技术及其在大型地下洞群研究中的应用
The stability of surrounding rock of xiangjiaba hydro - power station ' s underground powerhouses is demonstrated by the method of three - dimensional elastic and plastic damage elements
摘要采用三维弹塑性损伤有限元数值分析法对向家坝地下厂房洞群围岩稳定性进行了分析论证。

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