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为解决在45°光斜面、宽度1.5m、净空高度2.2m的廊道内钻灌施工平台搭设及深斜孔钻灌遇到的问题,以龚家坪水库为例,通过制作整体可移动式钻灌平台,采用取芯与不取芯相结合的方法和架设扶正器的措施,成功处理了#5坝段廊道内45°大坡度光斜面上钻深达84 m的深斜帷幕灌浆试验中遇到的施工技术问题;同时验证了在库前37m水头下灌浆形成防渗帷幕技术的可行性,为类似工况条件下同类项目施工提供了借鉴。
In order to solve the problems encountered in corridor boring construction platform drilling and deep inclined hole drilling at a 45 ° optical bevel, a width of 1.5 m and a clearance height of 2.2 m, taking the Gongjiaping Reservoir as an example, the overall mobile drilling platform , A combination of coring and non-coring methods and the installation of centralizer were successfully adopted to deal with the deep-slope curtain grouting test of 84 m deep on the 45 ° large-slope light bevel in the corridor of dam # 5 Construction technology; At the same time, the feasibility of grouting anti-seepage curtain grouting under the head of 37m in front of the building is verified, which provides reference for the construction of similar projects under similar working conditions.