离子土壤固化剂对非饱和砂土影响的试验研究
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摘要
以昆明市团结乡的砂土为研究对象,对非饱和砂土及加入离子固化剂改性砂土进行了三轴压缩试验。在不同含水率不同围压下,比较非饱和砂土在加入离子固化剂前后力学强度和变形特性指标及应力-应变关系曲线;对未加固化剂和加入固化剂非饱和砂土进行了变形模量分析,拟合应力-应变关系进行了归一化研究,得出非饱和砂土的Duncan-Chang模型参数的变化规律,为改性非饱和砂土的理论研究提供参考。
Taking sand as the research object in the village of Tuanjie,Kunming city,a series of triaxial tests are carried out on unsaturated soil and after treated by ionic soil stabilizer. After treated by ionic soil stabilizer,the mechanical strength deformation characteristics and stress strain relation curve of unsaturated soils are compared under different water content and confining pressure. For without adding ionic soil stabilizer and ionic soil stabilizer of unsaturated sand to analysis the deformation modulus,fitting stress-strain relationship to normalized equation study,the change rule of Duncan-Chang model parameters of unsaturated sandy soil is obtained,which provides reference for the theoretical study of modified unsaturated sandy soil.
Taking sand as the research object in the village of Tuanjie,Kunming city,a series of triaxial tests are carried out on unsaturated soil and after treated by ionic soil stabilizer. After treated by ionic soil stabilizer,the mechanical strength deformation characteristics and stress strain relation curve of unsaturated soils are compared under different water content and confining pressure. For without adding ionic soil stabilizer and ionic soil stabilizer of unsaturated sand to analysis the deformation modulus,fitting stress-strain relationship to normalized equation study,the change rule of Duncan-Chang model parameters of unsaturated sandy soil is obtained,which provides reference for the theoretical study of modified unsaturated sandy soil.
引文
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[2]王刚,张建民,魏星,等.剪胀性砂土地震后流滑的机理和模拟[J].岩土工程学报,2015,37(6):988-995.
[3]刘清秉,项伟,崔德山.离子土固化剂对膨胀土结合水影响机制研究[J].岩土工程学报,2012,34(10):1887-1895.
[4]刘清秉,项伟,张伟锋,等.离子土壤固化剂改性膨胀土水稳性研究[J].人民黄河,2009(2):87-88.
[5]卢雪松,项伟,范文彦,等.离子土壤固化剂加固红黏土试验研究[J].人民黄河,2010,32(2):127-129.
[6]朱维光,岑国平,许巍,等.固化剂稳定土在简易机场基层中的应用分析[J].四川建筑科学研究,2012,38(1):118-120.
[7]黄博,汪清静,凌道盛,等.饱和砂土三轴试验中反压设置与抗剪强度的研究[J].岩土工程学报,2012,34(7):1313-1319.
[8]董建军,邵龙潭.考虑端部效应影响的非饱和压实土三轴试验研究[J].岩石力学与工程学报,2010,29(9):1937-1944.
[9]张明然,胡宏骏,王志佳,等. PE-粘土轻质混合土三轴压缩试验研究[J].四川建筑科学研究,2014,40(3):125-127.
[10]杨同,徐川,王宝学,等.岩土三轴试验中的粘聚力与内摩擦角[J].中国矿业,2007,16(12):104-107.