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Commencement time：2004-6-1

Completion time：2005-10-11

Introduction：The depth of the foundation pit is about 16-17m during construction of the underground part of the pump house, and it belongs to construction of deep foundation pit. In order to guarantee smooth construction of the underground part of the pump house, the external side wall of the pump house is arranged as the underground diaphragm wall structure. The top elevation of the underground diaphragm wall structure is 2.0m, the bottom elevation is about -24.6m, and the thickness is 1.0m. The diaphragm wall is the support structure of the foundation pit during construction of the pump house, and is a part of the underground part structure of the pump house.