摘要
通过水泥土直剪试验以及正交试验,研究水泥土养护龄期、原土样含水率和水泥掺入比等因素对水泥土抗剪强度参数c(黏聚力)和φ(内摩擦角)值的影响规律。试验结果表明:养护龄期对c和φ值影响最大,土样含水率次之,水泥掺入比相对较小。基于线性回归和非线性回归分析,研究水泥土无侧限抗压强度随龄期、含水率和水泥掺入比等因素的变化规律,证明q_u(水泥土强度),c^2和φ~2之间存在线性关系,并建立各单因素及多因素影响下的强度评估模型,验证其正确性,对相关工程有一定的借鉴作用。
The influence law among the curing time,original soil water content and cement-mixed ratio on soil shear strength param-eters c,φvalue is studied based on direct shear test of cement mixed soil and orthogonal test.The test results show that the curing time has the biggest effect on c,φvalue of cement-soil,original soil water content is the second and cement-mixed ratio is the last.The change rule of the unconfined compressive strength along with curing time,cement-mixed ratio,water-cement ratio and others is studied too based on linear regression and nonlinear regression analysis,and linear relation of qu,c2 andφ2 is proved,the evaluation model of single factor and multiple factors under the influence of the intensity is built.It could be a reference for related engineering project as its validity is proved.
作者
赵春彦
黄启友
郎锋
胡杰
ZHAO Chunyan;HUANG Qiyou;LANG Feng;HU Jie(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Laboratory for High Speed Railway Construction,Central South University,Changsha 410075,China)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2018年第11期2788-2795,共8页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(51408613)
关键词
水泥土
正交试验
抗剪强度参数
无侧限抗压强度
强度评估模型
cement soil
orthogonal test
shear strength parameters
unconfined compressive strenght test
strength assessment model
