黄金科学技术 ›› 2020, Vol. 28 ›› Issue (3): 442-449.doi: 10.11872/j.issn.1005-2518.2020.03.130
Huaixin LI1(),Bin LIN1(
),Shiwei CHEN1,Peng WANG2
摘要:
为研究重塑红黏土的软化特性和抗剪强度与含水率之间的关系,以山西长治地区重塑红黏土为试验材料,进行了不同含水率下的三轴不固结不排水试验。试验结果表明:山西长治地区重塑红黏土在含水率和围压较小的情况下易发生宏观剪切破坏,其应力—应变曲线出现了明显软化现象,采用改进的应力—应变软化模型能够较好地模拟试验曲线的变化趋势;山西长治地区重塑红黏土中矿物质伊/蒙间层含量较高,土体内部存在较大孔隙,随着含水率和围压的增加,试样由宏观剪切破坏变为塑性破坏,当含水率为15%~24%时,其不排水抗剪强度与含水率之间呈线性关系。该项研究成果为认识特殊红黏土的破坏机理及软化现象提供了参考,同时也为进一步建立特殊红黏土数学模型提供了理论基础。
中图分类号:
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