硬梁包水电站方变圆大断面隧洞开挖技术  

Excavation Technology of Tunnel with Square-to-circular Large Section of Yingliangbao Hydropower Project

作　　者：张国平[1] ZHANG Guoping(Sinohydro Bureau 7 Co.,Ltd.,Chengdu Sichuan 610213)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213

出　　处：《四川水力发电》2024年第5期33-36,共4页Sichuan Hydropower

摘　　要：硬梁包水电站引水隧洞进口方变圆大断面洞室开挖通过先进行安全治理、锁口支护、超前预支护等措施后再进入洞段施工,先进行导洞开挖,再利用导洞开挖取得的技术参数和其所揭示的实际地质情况完成扩挖和分段分层开挖,施工时大量采用光爆和预裂爆破技术与工艺,抓住质量关键并严格过程控制,有效地保证了工程控制目标,效果明显,所取得的经验可为类似工程施工借鉴。The excavation of the large section cavern with a square-to-circular shape at the entrance of the diversion tunnel of the Yingliangbao Hydropower Station was carried out after the safety management,lock support,advance pre-support and more.The pilot tunnel was excavated first,and then the technical parameters obtained from the excavation and the actual geological conditions revealed by the excavation are used to complete the complete expansion and segmented layered excavation.A large number of light blasting and pre-crack blasting technology was applied during the excavation,the key quality was grasped and process control was strictly controlled,effectively guaranteeing the engineering control target,achieving obvious effect,which can provide reference for similar engineering construction.

关 键 词：硬梁包水电站 引水隧洞 方变圆大断面 隧洞开挖技术 

分 类 号：TV7[水利工程—水利水电工程] TV52TV554