高含水量水泥土工程特性试验研究  

Laboratory test on engineering properties of cemented soil with high water content

作　　者：唐海斌 TANG Hai-bin(Municipal Engineering Company of China Railway Tunnel Group Co.,Ltd.,Hangzhou 310030,Zhejiang,China)

机构地区：[1]中铁隧道局集团有限公司市政工程公司,浙江杭州310030

出　　处：《地基处理》2024年第3期256-261,共6页Journal of Ground Improvement

摘　　要：为研究高含水量水泥土工程特性,对不同配比的高含水量水泥土试块进行了无侧限抗压强度试验以及直剪试验。结果表明:可以采用水泥土含水量与水泥掺入量的比值作为评价水泥土性质的参数,且采用幂函数能够较好地表述水泥土强度和含水量与水泥掺入量比值的关系。将龄期为28 d时的水泥土强度作为基准,利用对数函数估算不同龄期下的水泥土强度值。本次试验观测到水泥土的变形模量约为强度的86.5倍。水泥土的内摩擦角随着强度的增加而增大,本次试验中水泥土的无侧限抗压强度从85.4 kPa增加到1811 kPa时,对应的内摩擦角从30.4°增加到45.0°。水泥土的黏聚力随强度的增加呈线性增大,本次试验中黏聚力约为强度的0.181倍。To investigate the engineering properties of cemented soil with high water content,unconfined compression strength tests and direct shear tests were conducted on test blocks with different water content.Results indicate that the ratio of the water content to cement content serves as a viable parameter for assessing cemented soil properties,with the relationship between cemented soil strength and the ratio aptly represented by a power function.Utilizing the cemented soil strength at 28 days as a reference,a logarithmic function is employed to predict the cemented soil strength at varying curing time.Observations reveal that the deformation modulus of cemented soil is approximately 86.5 times its strength.Moreover,the internal friction angle of cemented soil increases proportionally with the strength.During the experiment,an increase in unconfined compression strength from 85.4 kPa to 1811 kPa corresponds to an elevation in the internal friction angle from 30.4°to 45.0°.Furthermore,the cohesion of cemented soil exhibits a linear increase with strength,and the cohesion approximately 0.181 times the strength in this work.

关 键 词：水泥土 工程特性 无侧限抗压强度 高含水量 龄期 

分 类 号：TU43[建筑科学—岩土工程]