南方某高流速区江边取水泵站结构设计与探讨

Structure Design and Discussion of a Riverside Water Pumping Station in High Velocity Area in Southern China

南方某江边取水泵站位于水库下游约1 km,洪水期受水库泄洪影响,泵站部位局部水流流速达5 m/s。高流速冲刷使泵站底部卵石层地基层面不稳定,泵站受水流冲击并可能会产生振动。通过采取"半嵌入型"平面布置方式、钻孔灌注桩与高压旋喷桩结合的地基处理方式、端部半圆形泵站体型等措施,成功解决了各个难点问题。工程经受住了洪水考验,取得了良好的施工和运行效果,可为类似工程设计提供借鉴。

kin. The flood A riverside water pumping station is located at the downstream of the reservoir about 1 discharge from reservoir could cause local flow velocity of pumping station up to 5 m/s. High flow velocity scour made the pebbles at the bottom unstable, and vibration occurred to the pumping station since it was impacted by the water flow. By adopting a ＂semi embedded＂ layout pattern, in com- bination of bored pile and high pressure jet pile foundation treatment and shape measure of end semicir- cle, the difficult problems were successfully solved. The pumping station had withstood the test of the flood, and achieved good construction and operation results, which could provide experience for similar project design.