摘要
CCS水电站是厄瓜多尔规模最大的水电站,首部枢纽建筑物地基为深厚覆盖层,地质条件非常复杂。通过室内外实验测得了地基土的基本物理性质指标,在此基础上开展地基土抗剪强度指标的试验研究。通过对覆盖层中的细砂层和粉砂层土样进行三轴压缩试验,结果表明:固结排水剪三轴试验(CD)测得两种土的有效内摩擦角Φd在26.2°~37.5°之间,黏聚力Cd在17.2~75.4kPa之间;固结不排水剪三轴试验(CU)测得地基土的有效内摩擦角Φ′为23.8°~33.3°,黏聚力C′为24.0~83.4kPa。其研究结果为工程设计地基处理方案的选择提供了重要依据。
The CCS hydropower station is the largest hydropower station in Ecuador. The foundation of intake complex is deep overburden, and the geological condition is very complex. The basic physical properties index of the foundation soil were measured through indoor and outdoor experiments. On this basis, the experimental research on the strength index of the foundation soil is carried out. Through the triaxial compression test on the fine sand and silt sand layer of the overburden layer, the results of show that the effective friction angle of the two kinds of soils is 26.2° ~37.5° and the cohesive force is 17.2~75.4 kPa by consolidated drained triaxial test(CD). The effective friction angle is 23.8°~33.3° and cohesion is 24.0~83.4 kPa measured by consolidated undrained triaxial test(CU). The research results provide an important basis for the selection of foundation treatment schemes in engineering design.
作者
姚阳
张党立
齐三红
苗栋
郭卫新
YAO Yang;ZHANG Dangli;QI Sanhong;MIAO Dong;GUO Weixin(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)
出处
《水科学与工程技术》
2020年第5期76-79,共4页
Water Sciences and Engineering Technology
关键词
首部枢纽
地基土
抗剪强度指标
intake complex
foundation soil
shear strength index
