西南地区深厚覆盖层第四纪沉积物抗渗特性及参数的选择

Study on Impermeability Characteristics and Parameter Selection of Quaternary Sediments in Deep Overburden in Southwest China

以现场大型原位渗透变形试验为基础,通过对大量参数进行统计分析,提出了在深厚覆盖层上建高土石坝之第四纪沉积物土层的渗透变形参数建议值。通过现场试验,探讨了深达百余米的覆盖层物理力学参数及试验方法,为设计提供了可靠的依据,对即将或正在施工的大渡河流域双江口、金川等工程的勘察设计具有较好的指导和参考价值。

Based on large-scale in-situ seepage deformation test on site,and through statistical analysis of a large number of parameters,this paper proposes the suggested value of seepage deformation parameters of the quaternary sedimentary soil layer for construction of high earth-rockfill dams on deep overburden.Through field test,the physical and mechanical parameters and test methods of overburden with a depth of more than 100 meters are discussed,which provides a reliable basis for the design,and has good guidance and reference for the survey and design of the upcoming projects or projects under construction such as Shuangjiangkou Hydropower Station and Jinchuan Hydropower Station in the Dadu River.