不同固结压力下聚苯乙烯轻质混合土渗透特性试验研究  

Laboratory study of permeability of lightweight soil with EPS under different consolidation pressures

作　　者：刘汉龙[1] 朱云华[1] 董金梅[1] 

机构地区：[1]河海大学岩土工程研究所,南京210098

出　　处：《岩土力学》2007年第11期2333-2336,2358,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50479020)

摘　　要：通过室内渗透试验,对聚苯乙烯轻质混合土的渗透特性进行了研究,重点对龄期、水泥掺入比及EPS(聚苯乙烯轻质混合土)含量等主要影响因素进行了分析。采用常规三轴仪,进行了不同固结压力下的渗透试验,模拟土体在真实受力状态下渗透系数的变化。结果表明,渗透系数随水泥掺入比、龄期、固结压力的增大及EPS含量的降低而降低,近似为乘幂函数关系,但其降低的幅度因配比及龄期不同而异。The influences of age, cement-mixed ratio and EPS content on the permeability of LWS-EPS are studied mainly based on the permeability test. For simulating the change of coefficient of permeability of LWS-EPS in real situation, the permeability test is carried out under different consolidation pressures by routine triaxial apparatus. The results indicate that the coefficient of permeability decreases with the increasing of cement mixed ratio, age and consolidation pressure and the decreasing of EPS content, which have a power function relationship approximately. But the degree of decreasing to the coefficient of permeability varies with mixture ratio and age.

关 键 词：聚苯乙烯轻质混合土 渗透系数 龄期 水泥掺入比 EPS含量 固结压力 

分 类 号：TU43[建筑科学—岩土工程]