摘要
通过室内直剪试验,研究了含水量对压实粘土的抗剪强度的影响,并从土体结构与土中基质吸力变化两个方面分析了作用机理。试验表明,随压实含水量增大,粘土的抗剪强度降低,粘聚力随压实含水量增加并非单调变化,其曲线型式类似于"■"型,内摩擦角随压实含水量增加大体上是减小的;压实粘土浸水饱和后抗剪强度和粘聚力则显著降低,且压实含水量越小的土体在其它条件相同的条件下因饱和引起的抗剪强度和粘聚力损失越大,内摩擦角受浸水饱和的影响较小。
This paper studied effects of moisture content on the shear strength of a compacted clay by carrying out direct shear tests, and analyzed the mechanism of the influence from two aspects of soil structure and variation of matrix suction in clay. The results of the tests show that with compaction water content increasing, the shear strength decreases and angle of friction also increases. Cohesion doesn＇t increase simply with compaction water content increasing, and the curve of cohesion versus compaction water content looks like a shape of ＂ VN＂ . Soaking leads to a significant reduction in shear strength and cohesion. The lower is compaction water content, the more loss is shear strength and cohesion by soaking at same other conditions. Angle of friction has few loss by soaking.
出处
《金属材料与冶金工程》
CAS
2009年第3期49-53,共5页
Metal Materials and Metallurgy Engineering
关键词
粘土
含水量
粘聚力
内摩擦角
clay
moisture content
cohesion
angle of friction
