摘要
三峡二期围堰防渗墙最高74m，墙厚0．8－1．1m，防渗总面积83450m2。其中墙深大于40m，采用塑性混凝土，成墙最高月达11188m2。防渗墙经1998年夏季长江8次洪峰考验，堰体渗透比降最大值0．108，小于堰基粉细砂设计允许值0．25；渗水总量约50L／s，小于设计估算基坑渗水总量600L／s，防渗效果显著。
The Three Gorges second stage cofferdam cut - off wall has the following dimensions: maxium height 74m, thickness 0.8 - 1. 1m,total seepage proof area 8345m2 ,Wall depth greater than 40m. The maximum area of monthly wall construction form plastic concrete reaches to 11188m2. The cut - off wall has been underwent the trial of 8 times Yantze river flood peak in the - of 1998. The maximum percolation gradient of the cofferdam is 0.108, less than the allowable design value of the cofferdam foundation of silty fine sand 0.25. The total seepage discharge is approximately 50L/s, less than the designed estimate of foundation pit seepage 600 L/s. This yields notable results of seepage prevention performance.
出处
《勘察科学技术》
2000年第1期6-9,共4页
Site Investigation Science and Technology
关键词
围堰
塑性混凝土
防渗墙
配合
槽段
质量控制
second stage cofferdam
plastic concrete
cut-off wall
mixing proportion
groove segment
quality control
