【作者】 任金明；

【导师】 李梭杰； 陈玉夫；

【作者基本信息】 大连理工大学 ， 水利工程， 2002， 硕士

【摘要】 本论文研究的宽级配砾质土指的是黏性粗粒土，是一种天然的土石混合料，其颗粒组成通常以5mm为界分为粗料和细料两部分，这两部分组成含量的变化直接影响到它的工程性质。宽级配砾质土是一种良好的防渗材料。 满拉水利枢纽工程拦河坝为宽级配砾质土心墙土石坝，坝顶高程4261.3m，最大坝高76.3m。针对目前国内尚没有宽级配砾质土作为高土石坝防渗体的实际施工经验，对土料进行了较为详细的试验研究工作。该土料具有较好的密实度、较高的抗剪强度和低压缩性。但是存在土料天然含水量偏低，黏粒含量较少、塑性较差、含砾量不均、渗透系数偏大等缺陷。 本论文对满拉心墙各项控制指标及施工中的质量控制进行了详细的论述。特别对于宽级配砾质土的压实控制方法，重点研究了用西尔夫三点击实法。实践证明三点击实法用于高海拔地区宽级配砾质土心墙的质量检测是非常适宜的。满拉工程心墙土料含砾量变化较大，对三点击实法有所改进，即快速测含水量和将测定全级配土料的压实度改为测定小于5mm土料的压实度。更多还原

【Abstract】 The spreading gradation soil analyzed in the article is a cohesive coarse soil. It’s a kind of crude soil-rook mixtures .It’s often devided into fine material and coarse material by the save of 5mm and the charge of the two contents affects its project quality directly. It’s also a better kind of permeation proof materials. As far as the methods of compaction control be concerned, the author studied Hilf three-point-compaction especially. It’s proved that three-point-compaction used in the quality check of spreading gradation soil core wall is very suitable in high height above sea level areas. Because the gravel content in the core wall of Mania project changed greatly, the author improved the method of three-point-compaction, that is, measuring water content in medially and changing measuring the compaction degree of full gradation soil into measuring the compaction degree of the soil less than 5mm.The dam of Mania hydroelectric project is a soil-rock dam with spreading gradation soil of core wall. The height of the dam apices is 4261. 3m and the maximal height is 76. 3m. As for lack of construction experience in using spreading gradation soil as the permeation proof body in our country at present, the author has studied the soil material carefully. The soil owns better density degree. Higher shearing resistance and low compaction, but it’s crude water content is low, cohesive gravel content is small. Plasticityis worse, grovel content isn’t average and the coefficient of permeation is larger etc. The article is discussed all of controlling indexes and construction quality control clearly.更多还原