不同环境对水泥土动应力影响的试验研究

发布时间：2018-04-04 07:42

本文选题：水泥土　切入点：动三轴压缩试验　出处：《地震工程学报》2016年06期

【摘要】：为研究腐蚀性介质和动荷载对水泥土力学特性的影响,通过水泥土的动三轴压缩试验,获取水泥土动应力试验参数,分析各种环境对水泥土动强度的影响。试验结果表明,当硫酸钠溶液浓度小于0.03mol/L时水泥土的动强度逐步增大,当硫酸钠溶液浓度大于0.03mol/L时水泥土的动强度又逐步降低;随着氯化钠溶液浓度的增大,其动强度逐步降低;随着腐蚀时间的增加,0.03mol/L硫酸钠溶液的水泥土动强度逐步增大,而0.1 mol/L和0.3 mol/L硫酸钠溶液的水泥土动强度均逐步降低;水泥掺入比和围压越大,水泥土动强度越大;当溶液浓度小于0.03mol/L时硫酸钠环境对水泥土的动强度有增强效应,且浓度大于0.03mol/L时硫酸钠环境对水泥土具有腐蚀破坏效应,且硫酸钠溶液腐蚀效应大于氯化钠溶液腐蚀效应。
[Abstract]:In order to study the influence of corrosive medium and dynamic load on the mechanical properties of cement soil, the dynamic stress test parameters of cement soil were obtained by dynamic triaxial compression test of cement soil, and the influence of various environments on the dynamic strength of cement soil was analyzed.The results show that when the concentration of sodium sulfate solution is less than 0.03mol/L, the dynamic strength of cement soil increases gradually, and when the concentration of sodium sulfate solution is greater than 0.03mol/L, the dynamic strength of cement soil decreases gradually, and with the increase of concentration of sodium chloride solution,With the increase of corrosion time, the dynamic strength of cement soil in 0.03 mol / L sodium sulfate solution gradually increased, while the dynamic strength of cement soil in 0.1 mol/L and 0.3 mol/L sodium sulfate solution decreased gradually, and the ratio and confining pressure of cement increased.When the concentration of solution is less than 0.03mol/L, the dynamic strength of cement soil is enhanced by sodium sulfate environment, and when the concentration is higher than 0.03mol/L, sodium sulfate environment has corrosion damage effect on cement soil.The corrosion effect of sodium sulfate solution is greater than that of sodium chloride solution.
【作者单位】：沈阳工业大学建筑与土木工程学院;江西工业工程职业技术学院;
【基金】：国家自然科学基金资助项目(51279109)
【分类号】：TU41

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