辛克雷水电站沉砂池深厚覆盖层基础处理设计及效果

Design and Effect of Foundation Treatment for Deep Overburden of Sand Settlement Pool in CCS Hydropower Station

辛克雷水电站沉砂池位于IX度地震区,基础为深度大于80m的砂砾石覆盖层,基础处理是制约沉砂池布置及安全的关键问题。通过多种基础处理方案的研究,确定采用灌注桩复合基础,较好地解决了基础沉降和高地震水平荷载对桩身的影响,为高地震区、深厚覆盖层处理积累了工程经验。

The sinking basin of CCS Hydropower Station is located in the IX seismic area, and its foundation is a sand and gravel covering layer with a depth greater than 80m. Foundation treatment is a key problem to restrict the layout and safety of grit chamber. Through the study of various foundation treatment schemes, it is decided to adopt composite foundation of cast-in-place piles. It preferably solves the influence of foundation settlement and high seismic horizontal load on pile body, and accumulates engineering experience for treatment of high seismic area and deep overburden.