粉煤灰对太行山东麓膨胀土抗剪强度影响试验研究  

Experimental Study on the Influence of Fly Ash on the Shear Strength of Expansive Soil in the Eastern Foothills of the Taihang Mountains

作　　者：唐东旗 曹芳婷 张益杰 郭丽云 裴欢欢 张少乐 赵赛 TANG Dongqi;CAO Fangting;ZHANG Yijie;GUO Liyun;PEI Huanhuan;ZHANG Shaole;ZHAO Sai(School of Civil Engineering,Xuchang University,Xuchang 461000,China)

机构地区：[1]许昌学院土木工程学院,河南许昌461000

出　　处：《许昌学院学报》2025年第2期89-93,共5页Journal of Xuchang University

基　　金：许昌学院科研专项项目(2023ZX092);河南省科技攻关项目(212102310458);河南省高等学校重点科研项目(16A410003)。

摘　　要：膨胀土是一种具有胀缩性质的土,对工程建设产生严重影响.通过对太行山东麓膨胀土拌合粉煤灰量为0%、5%、15%、30%开展了物理力学性质试验,试验结果表明,随着粉煤灰含量的增加,土体的应力应变关系将越易产生应变软化;随粉煤灰含量的增加,在法向应力较低时易产生峰值点,法向应力越高产生峰值点后的残余应力变化越慢.内摩擦角变化表现为先降低后增加再降低,内聚力一致呈现增加状态.Expansive soil is a type of soil characterized by swelling and shrinkage properties,which significantly impacts engineering construction.Physical and mechanical property tests were conducted on expansive soil from the eastern foothills of the Taihang Mountains,with fly ash contents of 0%,5%,15%,and 30% respectively.The test results indicate that as the fly ash content increases,the stress-strain relationship of the soil becomes more prone to strain softening.With increasing fly ash content,peak points are more likely to occur under low normal stress,while the residual stress changes more slowly after the peak point under higher normal stress.The internal friction angle initially decreases,then increases,and finally decreases again,whereas the cohesive force consistently increases.

关 键 词：粉煤灰 膨胀土 应力应变关系 抗剪强度指标 

分 类 号：TU431[建筑科学—岩土工程]