高湿环境土石坝土料比选分析和物理性能研究

Comparative analysis and physical properties of earth rock dam filling materials in high humidity environment

某低海拔抽水蓄能电站工程,因空气相对湿度大,致使开挖土料含水率较高,土料场全风化土料性状主要为晶屑凝灰岩风化土及花岗岩风化土,通过开展颗粒级配试验、界限含水率试验、击实试验、静力三轴等土工试验,研究了相对湿度较大的环境下,土料的级配、强度、渗透等物理力学指标,进而对土料的适用性进行比选分析,更好的指导现场施工,为高相对湿度环境下,确定土石坝填筑防渗区土料选取方式提供了理论依据。

In a low-altitude pumped storage power station project,due to the high relative humidity of air,the moisture content of excavated soil is high.The fully weathered soil in the soil field is mainly composed of crystalline debris tuff weathered soil and granite weathered soil.Through the geotechnical tests such as particle gradation test,boundary moisture content test,compaction test and static triaxial test,the physical and mechanical indexes such as gradation,strength and permeability of soil under relatively large relative humidity environment are studied,and the applicability of soil is compared and analyzed,so as to better guide the field construction,and provide a theoretical basis for determining the selection method of soil material in the impervious area of earth-rock dam filling under high relative humidity environment.