三峡工程二期围堰基坑排水施工

Strategies for Draining Pit Water during Construction of the Second-Stage Cofferdam of the Three Gorges Project

针对三峡二期围堰基坑排水的特点与难点 ,通过引入泵站串联、沉管施工等技术措施 ,解决了特大流量、特大水位变幅的大型深基坑排水的技术难题 ,为三峡二期工程施工创造了良好的条件。

In consideration of the characteristic and difficulties related to the pit dewatering for the second stage cofferdam construction of the Three Gorges Project, the pump station seriating and sinking pipe methods were used. These solved the technical problems of super flow and super level changes for the super big pit dewatering in the hydroelectric station construction. It made the good condition for construction of the Three Gorges Project.