TB水电站主厂房预留岩盖法开挖施工技术

Construction Technology of Reserved Rock Cover Excavation for TB Hydropower Station Main Building

由于地下工程洞室纵横交错相贯环绕布置,构成从空间和时间上的多维度立体交叉平行施工的局面,结合大型地下工程施工的一些先进快速施工方法,在TB水电站地下厂房创新提出了一种“预留岩盖法”开挖施工方法,解决了地下厂房上下立体平行施工的难题,以及因开挖高度大按照常规施工方式导致开挖支护占用主关键线路工期长的问题,加快了施工进度,缩短了施工工期。

Due to the criss crossing and interlocking arrangement of underground engineering caverns,a multi-dimensional,three-dimensional and parallel construction situation is formed in terms of space and time.Combining some advanced and rapid construction methods for large-scale underground engineering construction,TB Hydropower Station has innovatively proposed a"reserved rock cover method"for excavation construction of underground powerhouses.It solves the problem of parallel construction of the upper and lower levels of underground factory buildings,as well as the problem of long construction period occupied by excavation support due to the large excavation height using conventional construction methods,accelerating the construction progress and shortening the construction period.