Construction Technology for Excavating a Hole to the Bottom of Roof Arch of the Main Plant of TB Hydropower Project
Through the analysis and summary of the excavation construction of the top arch of the underground powerhouse of TB hydropower station,a refined blasting technology of"one hole to the bottom"has been developed for the top arch of the underground powerhouse.By using explosives to fix bamboo strips tightly against the excavation contour,reserving 50mm of pesticide free bamboo strips at the bottom of the hole,staggered arrangement of charge structures,optimizing the density of line charges,and other measures,this article explores a set of construction methods for excavating large cross-section three center arc arch chambers from one hole to the bottom.It solves the problem of connecting blast holes between blasting rows,with good overall flatness and appearance quality.
one hole to the bottomexcavation constructionTB Hydropower Stationunderground factory building
国家科技期刊平台
NSTL
万方数据
