沉井在给水排水工程中的应用

Application of Open Caisson in Water and Wastewater Engineering

沉井设计理论和施工技术都较成熟,适于软土条件下地下建(构)筑物的施工,并在给水排水工程中得到了广泛应用。从设计要点、施工情况及现场变更等方面介绍了江苏某大型污水泵房的沉井施工技术。该泵房所处土层较差,摩擦系数小,施工时易偏斜和突沉,加之当时连续大雨和长江洪水对沉井的实施造成了不利影响,通过采取合理的措施和施工方案,避免了重大工程事故的发生。

Based on the mature design and construction scheme oi open caisson, the open is suited for construction of infrastructures in soft soil, and widely used in water and wastewater engineer- ing. The construction scheme of open caisson of a large wastewater pump room in Jiangsu was introduced from aspects of design keys, construction status and fieldwork modification. The characteristics of soil un- der the station are poor with small friction coefficient, which easily brings on the deflection and sudden subsidence during construction. And the continuous heavy rain and the Yangtze flood have seriously unfa- vorable influence on the open caisson construction at that time. The serious engineering accident was a- voided by the reasonable measures and construction scheme.