Test method for determination of optimum moisture content of soil and maximum dry density
Test method for determination of optimum moisture content of soil and maximum dry density
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测定土壤最佳含水量和最大干密度的试验方法
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Kai Hu
中科院分区：
文献类型：
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作者：
Xiaochuan Ren;Y. Lai;Fanyu Zhang;Kai Hu
根据土体侧限压缩模量值的物理参数，提出了一种利用少量土样精确确定土体的最佳含水率和相应的最大干密度的方法。根据压力-压缩弹性模量曲线上压缩弹性模量的峰值来确定最佳含水率和最大干密度。用青藏粘性土、SiO_2粘性土、兰州黄土和青藏沙土四种不同类型的土对该方法进行了验证。结果表明，与传统的击实方法相比，该方法可以准确地确定各种类型土壤的最佳含水率和最大干密度。另外，对于一定的含水率，当土体压实最大时，粘土和SiO_2粘土达到理论饱和状态，而砂土和黄土则没有达到理论饱和状态。
A method for accurately determining the optimum water content of soil and the corresponding maximum dry density has been developed using a small number of soil samples, based on the physical parameters of the confined compression modulus of soil. The peak value of the compression modulus on the force-compression modulus curve is used to determine the optimum moisture content and maximum dry density. The proposed method is validated using four different types of soils: Qinghai-Tibet clay, SiO2-clay, Lanzhou loess, and Qinghai-Tibet sand soil. The results show that as opposed to conventional compaction methods, the new method allows for accurate determination of the optimum water content and the maximum dry density for various types of soil. Additionally, for certain moisture contents, when the compaction of soil is the greatest, clay and SiO2-clay attain the theoretical saturation status, whereas sand soil and loess do not.