A construction engineering technical field. The exact settlement of super large and deep foundation pit and environmental construction method, the super large and deep foundation pit design and construction process in the pit extraction caused by confined water aquifer compression, resulting in accurate prediction and control of ground settlement around deep excavation. The invention has the advantages of simple operation, reasonable prediction of settlement and reasonable selection of treatment methods, thereby achieving the purpose of controlling the surface subsidence around the earth and protecting the environment.
【技术实现步骤摘要】
【技术保护点】
１．一种超大超深基坑精确沉降及环保施工方法，其特征在于，包括以下步骤：步骤一，现场水文地质勘测，取土钻孔，划分土层，确定工程影响范围内承压含水层的顶板及底板深度并确定基坑开挖及围护结构的埋设设计深度，对比前期水文地质勘测测得的承压含水层顶板及底板深度，判断隔水形式，当地连墙深度小于承压含水层底板深度，且施工过程中需要长期抽取该层地下水时，则继续下一步骤；步骤二，现场选址，根据各工地施工现成的实际情况在基坑周围选择适当的位置建造回灌中转池，回灌中转池的尺寸也根据现场情况选择，储水量大于等于抽水井２小时的抽水量；步骤三，沿基坑的周边布置承压水水位观测井，距基坑止水帷幕５－１０ｍ...
【技术特征摘要】
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