Drained Monotonic Responses of Suffusional Cohesionless Soils
Drained Monotonic Responses of Suffusional Cohesionless Soils
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DOI：
10.1061/(asce)gt.1943-5606.0001327
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发表时间：
2015-08-01
影响因子：
3.9
通讯作者：
Takahashi, Akihiro
中科院分区：
文献类型：
--
作者：
Ke, Lin;Takahashi, Akihiro
本文研究了不同初始有效围压条件下，不同初始细粒含量的无粘性土的膨胀力学后果。采用修正的三轴渗透系数，进行了渗透试验和连续排水单调压缩试验。结果发现，土壤排水强度下降后sufficient和暂时的刚度下降，在初始阶段的剪切相对于轴向应变范围从0到1%的观察。这些试验表明，饱水可能会造成土壤颗粒的明显堆积，这可能是由于细颗粒在收缩尺寸（代表土壤中孔隙通道的尺寸）小于细颗粒的地方可能积累所致。这些残留的细粉在浸水后可能会在随后的压缩中起到加固或堵塞的作用，从而导致浸水土具有更大的初始刚度。(C)2015年美国土木工程师协会。
Mechanical consequences of suffusion on the noncohesive soils with various initial fine contents under different initial effective confining pressures are presented in this paper. By using the modified triaxial permeameter, seepage tests and successive drained monotonic compression tests are performed. It is found that soil-drained strength decreases after suffusion and a temporary drop in stiffness at the initial stage of shearing with respect to the axial strain ranging from 0 to 1% is observed. The tests suggest that suffusion might create a distinct packing of soil grains, which might result from possible accumulation of fine grains at the spots where the constriction size-representing the size of pore channels in a soil-is smaller than that of fines. Those surviving fines after suffusion may function as reinforcement or jamming at the subsequent compression, resulting in a larger initial stiffness of the suffusional soils. (C) 2015 American Society of Civil Engineers.