仙居抽水蓄能电站泄放洞工作弧门室开挖施工技术

Construction Technology of Spillway Radial Gate Chamber Excavation in the Xianju Hydroelectric Power Station

结合仙居抽水蓄能电站下水库泄放洞工作弧门室实际施工条件,研究小型工作弧门室利用先期开挖的交通洞和通风洞进行分层分块开挖的施工方法,较好地解决了狭小洞室内工作面难以展开的施工难题,加快了施工进度,确保了施工安全;并对岩锚梁开挖进行光爆试验,取得良好的爆破效果,达到了设计质量标准。

Combined with spillway radial gate chamber excavation in Xianju Hydroelectric Power Station,the construction technology of small radial working gate chamber stratified excavation using transport cavern and ventilation cavern is discussed.The problems of narrow cavern working face＇s construction are solved,which reduce the time and assure the construction safety.Rock anchor beam smooth blasting test is made,and this application has been tested by practice,having reached the requirements.