石灰水泥改良硫酸盐渍土盐胀特性研究

摘要

Saline soil is special and complicated, beaides soil heaving, it has charactera of collapsibility and corrosion, which does extremely harm to the road. In oeder to solute these questions,the author analyses salt heaving effect of sulphate treated saline soil with combined effect of cement and lime, through salt heaving test of sulphate treated saline soil and orthogonal test design, the best mix ratio and the influence sipnificane of all mix materials are analyzed. The reault show that:the mix use of cement and lime have a good effect on sulphate treated saline soil cantent sulfate less than 4% ,!o sulphite treated saline soil content sulfate more than 4% , the mix use of cement and lime also have a effect on decreasing salt heaving effect.%硫酸盐渍土作为一种特殊土,具有溶陷、盐胀、腐蚀等不良的工程特性,硫酸盐渍土路基填料是制约交通建设快速发展的重大岩土工程问题之一.为了解决硫酸盐渍土工程应用难题,采用石灰、水泥混合改良材料对不同含盐量的硫酸盐渍土进行改性试验,测试了改良盐渍土在无载条件下的盐胀量.并运用正交分析法研究了石灰和水泥对盐渍土盐胀影响的显著性.结果表明:使用石灰、水泥混合改良材料对硫酸盐渍土进行改良,能有效处理弱硫酸盐渍土、中硫酸盐渍土、强硫酸盐渍土地基,对于过硫酸盐渍土,也能有效的减小其盐胀率.