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宋达.确定非饱和粉土吸附强度的试验研究[J].实验力学,2018,33(3):477~483
确定非饱和粉土吸附强度的试验研究
Experimental study on determining the adsorption strength of unsaturated silt soil
投稿时间: 2017-02-23  最后修改时间: 2017-05-08
DOI:10.7520/1001-4888-17-037
中文关键词:  非饱和粉土  抗剪强度  吸附强度
英文关键词:unsaturated silt soil  shear strength  adsorption strength
基金项目:河南省科技厅基础与前沿研究项目(162300410012);住建部砼芯水泥土砂浆桩的试验及理论分析研究(2011k345)
作者单位
宋达 河南大学岩土与轨道交通研究所 河南开封 475004 
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中文摘要:
      非饱和粉土的吸附强度是土力学研究中的难点。针对非饱和粉土吸附强度的影响因素复杂且难以确定等问题,以饱和粉土抗剪强度计算公式为基础,以非饱和粉土抗剪强度作为过渡,研究吸附强度的确定方法。本文通过对不同含水率条件下的非饱和粉土进行固结不排水三轴剪切试验,利用MATLAB对得到的试验结果进行线性回归分析,探究非饱和粉土吸附强度与含水率之间的关系,提出了非饱和粉土吸附强度的计算公式。研究结果表明,非饱和粉土的吸附强度与含水率呈线性递减趋势。本文提出的计算公式可为非饱和粉土的理论分析和工程应用提供参考。
英文摘要:
      The adsorption strength of unsaturated silt soil is a difficult point in the study of soil mechanics. Aiming at the problems such as factors affecting adsorption strength of unsaturated silt soil are complex and difficult to determine,based on the formula of saturated silt soil shear strength, taking the shear strength of unsaturated silt soil as a transition, the determination method of its adsorption strength was studied. In this paper, the consolidated undrained three axis shear experiment of unsaturated silt soil with different water contents was carried out, the linear regression analysis of obtained experimental results was carried out by using MATLAB, the relationship between adsorption strength and water content of unsaturated silt soil was explored. A formula for calculating the adsorption strength of unsaturated silt soil is proposed. Results indicate that the relation between adsorption strength and water content of unsaturated silt soil presents a linear decreasing trend. Above mentioned formula may be used as a reference for theoretical analysis and engineering application of unsaturated silt soil.
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