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一、概况葛洲坝水利枢纽分两期施工,第一期工程修建二、三江建筑物,第二期修建大江工程。二江导流渠是大江截流和二期导流过水建筑物的主要组成部分,开挖工期和质量能否确保,将直接影响大江截流工期与难度。特别是在导流渠内的上、下游横向围堰需在汛后开始拆除,而要在截流前拆完。因此,正确选择施工方案,合理组织施工,就显得极为重要。二江导流渠以泄水闸为界,分上、下导渠,布置如图1所示:
First, an overview Gezhouba dam construction in two phases, the first phase of the project to build two or three Jiang buildings, the second phase of the construction of the Dajiang project. The two-river diversion canal is the major component of the river closure and the second-stage diversion of over-water structures. Whether excavation duration and quality can be ensured will directly affect the duration and difficulty of the river closure. In particular, upstream and downstream transverse cofferdams in the diversion channel need to be dismantled after flood season, but must be demolished before closure. Therefore, the correct choice of construction programs, rational organization of construction, it is extremely important. Two diversion ditches to the sluice gate for the community, points on the next channel, the layout shown in Figure 1: