摘要
以礼河四级电站复建工程所在地属于高地震烈度区域,同时受断裂带影响,地下厂房的围岩条件为Ⅲ、Ⅳ类围岩,为挤压破碎围岩。由于地下厂房地质条件较差,为提高截断地表水下渗的保证率,提高厂房顶拱围岩稳定性,为厂房的开挖提供足够的安全保障,利用厂顶灌排廊道对地下厂房顶拱进行固结灌浆,降低厂房开挖安全风险。
Yilihe Fourth Cascade Hydropower Station Reconstruction Project is located in high seismic intensity area and affected by fracture zone.The surrounding rock condition of underground power house is Class III and IV surrounding rock,which is extruded and crushed.Due to poor geological conditions of underground power house,in order to improve the guarantee rate of cutting off surface water seepage,improve the stability of surrounding rock of roof arch of power house,and provide sufficient safety guarantee for power house excavation,consolidation grouting of roof arch of underground power house is carried out by using roof grouting and drainage gallery to reduce the safety risk of power house excavation.
作者
胡传安
何品杰
周武
HU Chuan-an;HE Pin-jie;ZHOU Wu(POWERCHINA SINOHYDRO ENGINEERING BUREAU 14 CO.,LTD.,Kunming 650041,China)
出处
《云南水力发电》
2023年第5期46-50,共5页
Yunnan Water Power
关键词
地下厂房
挤压破碎围岩
固结灌浆、安全风险
underground powerhouse
attrition crushingsurrounding rock
consolidation grouting
safety risk
