汉江王甫洲水利枢纽围堰固化灰浆防渗墙施工

Construction of solidified mortar diaphragm wall for the cofferdam of Wangpuzkou Water Control Project in the Hanjiang River

在汉江王甫洲水利枢纽施工围堰基础防渗工程中，采用抓斗挖掘槽孔，成功地建造了３道固化灰浆防渗墙，总截水面积达１５１７８．７ｍ２。按围堰实际渗水量估算，固化灰浆防渗墙渗透系数小于１×１０－６ｃｍ／ｓ。在砂砾石地层中使用抓斗挖槽和大规模使用固化灰浆这种墙体材料，在我国水利水电建设中尚属首次。

In the construction of foundation seepage control wall for construction cofferdam of Wangpuzhou Water Control Project in the Hanjiang River,the clamshell was used to dig the trench. Three solidified mortar diaphragm walls with the total cutoff area of 15178. 7m2 have been built. It is calculated according to actual seepage volume of cofferdam that the seepage coefficient of solidified mortar diaphragm wall is less than 10--6 cm/s. It is the first time in the construction of water conservancy and hydropower in China that the clamshell was adopted to dig trench and solidified mortar material was used massively in the seepage control for sand and gravel alluvium.