为了研究动力荷载以及地下腐蚀性介质环境对水泥土力学特性的影响,本文通过水泥土的动三轴压缩试验,获取了不同环境下水泥土的动弹性模量参数,分析了不同环境对水泥土动弹性模量影响的关系曲线。试验结果表明,随着硫酸钠腐蚀溶液浓度的增大,水泥土的动弹性模量逐步增大,当浓度达到约0.03mol/L时,水泥土的动弹性模量开始逐步降低;随着腐蚀时间的增加,当硫酸钠溶液浓度较小(小于0.03mol/L)时,水泥土的动弹性模量逐步增大;当硫酸钠溶液浓度较大(大于0.03mol/L)时,水泥土的动弹性模量逐步降低;当溶液浓度较小(小于0.03mol/L)时,硫酸钠环境对水泥土的动弹性模量具有增强效应。而浓度较大(大于0.03mol/L)时,硫酸钠溶液和氯化钠溶液对水泥土均产生腐蚀破坏效应,且硫酸钠溶液腐蚀效应大于氯化钠溶液腐蚀效应;水泥掺入比越大,其动弹性模量越大;围压越大,水泥土的动弹性模量越大。
Abstract
In order to study the effect of dynamic load and underground corrosive medium environment on mechanical properties of cemented soil, dynamic triaxial compression test is employed to obtain dynamic elastic modulus of cemented soil in different environment. The relationship curve on dynamic elastic modulus of cemented soil is analyzed in different environment. The results show that dynamic elastic modulus of cemented soil increases gradually with the increasing sodium sulfate corrosion solution concentration. When the concentration reached about 0.03mol/l, dynamic elastic modulus of cemented soil began to decrease gradually. When the concentration of sodium sulfate is small (less than 0.03mol/l), dynamic elastic modulus of cemented soil increased gradually. When the concentration of sodium sulfate is large (more than 0.03mol/l), the effect of corrosion and damage of cemented soil was produced by sodium sulfate solution and sodium chloride solution. And the corrosion effect of sodium sulfate solution is more than sodium chloride solution. Dynamic elastic modulus of cemented soil increases gradually with the increasing cemented content. Dynamic elastic modulus of cemented soil increases gradually with the increasing confining pressure.
关键词
水泥土 /
动三轴压缩试验 /
动弹性模量 /
腐蚀环境 /
水泥掺入比 /
围压
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Key words
cemented soil /
dynamic triaxial compression test /
dynamic elastic modulus /
corrosive environment /
cemented incorporation ratio /
confining pressure
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脚注
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