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通过室内压缩试验和直剪试验,研究了含水量对压实粘土的压缩变形与抗剪强度的影响,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,粘土的压缩变形增加、抗剪强度降低;粘聚力随压实含水量增加并非单调变化,其曲线形式类似于“”形;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,压缩变形显著增加,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他条件相同时,因饱和引起的压缩变形、抗剪强度和粘聚力损失较大,内摩擦角受浸水饱和的影响较小。
The effects of water content on compressive deformation and shear strength of compacted clay were studied by indoor compression test and direct shear test. The mechanism of action was also analyzed from two aspects of soil structure and soil suction change. The results show that with the increase of compacted water content, the compressive deformation of clay increases and the shear strength decreases. The cohesion increases with the increase of compacted water content and does not change monotonically. The curve form is similar to " Water content increases, generally decreases. Compacted clay saturated water saturation, compressive deformation increased significantly, shear strength and cohesion was significantly reduced. When the soil with the smaller water content is compacted, the compressive deformation, the shear strength and the cohesion loss due to saturation are larger, and the internal friction angle is less affected by the water saturation.