The construction scheme is briefly introduced herein , and furthermore , the diversion structures , the composite scheme consisting of open caisson group adopted to treat the overburden of the foundation for the stage 2 longitudinal concrete cofferdam and the diversion method of bottom outlet combined with the dam gap used for the stage 2 diversion are described as well 文中对该方案进行了简要介绍,并介绍了有关导流建筑物,以及二期纵向混凝土围堰堰基覆盖层采用了沉井群等综合处理方案和二期导流采用的底孔加缺口联合泄流方式。
Through analyzing the structure of open caisson , and according to sinking stress principle , the paper introduced in the open caisson construction process sinking , correcting error , survey control as well as peculiar circumstance processing technical measure , such as in open caisson construction the inner - mold for sanding , framework supporting and steel binding , and concrete casting ; in open caisson sinking - control the sand in edge foot inner - mold , sand - pumping sinking , and pressure hydraulic monitor breaking and pressure - blowing sinking by air pressure blower etc 摘要根据下沉受力原理,分析了沉井结构,介绍了沉井施工过程中的下沉、纠偏、测量控制以及特殊情况处理的技术措施,如沉井制作中的填沙内模,模板支设和钢筋绑扎,混凝土浇注;沉井下沉控制中的刃脚内模沙土,抽沙泵抽沙下沉,高压水枪破压、空压机吹压下沉等。