肯尼亚KarimenuⅡ大坝填筑土料试验研究

摘要:

肯尼亚KarimenuⅡ大坝土料场位于库区上游,料场土主要为高液限粉土,具高孔隙比、高含水量、塑性指数大,粘粒含量高等特点；土料最优含水率为平均值为48.5%,与天然含水率相近,最大干密度平均值为1.13g/cm³,粘粒含量平均值46.7%。按设计要求0.96压实度配样后,土样具极微渗透性、中等压缩性。经碾压试验,库区土料可满足施工质量控制要求。土料的建议含水率控制在最优含水率ω0-5%至ω0范围,采用天然含水率压实度可以满足设计要求。

Abstract:

SThe Karimenu II dam backfill material site in Kenya is located in the upper reaches of the reservoir area; The backfill materials is mainly the high liquid limit silt, The Characteristics of the material soil is high porosity ratio, high water content, large plastic index, high clay content. The optimal water content is 48.5% , which is similar to the natural water content, The average maximum dry density was 1.13 g/cm_³, and the average clay content was 46.7% . According to the design requirements ,The degree of compaction soil samples is 0.96 with micro-permeability, medium compressibility. After the roller compaction test, the soil in the reservoir area can meet the construction quality control requirements . The recommended moisture content of soil should be controlled in the range of optimum moisture content ω0-5% to ω0 ,and The compaction degree of natural water content can arrive the design requirements.