[1]鲍俊安,杨平,王许诺..水泥土冻胀特性试验研究[J].郑州大学学报(工学版),2013,34(01):5-9.[doi:10.3969/j.issn.1671-6833.2013.01.002]
　BAO Jun-an,YANG Ping,WANG Xu-nuo.Experimental Study on Frost Heave Properties of Cement-improved Soil[J].Journal of Zhengzhou University (Engineering Science),2013,34(01):5-9.[doi:10.3969/j.issn.1671-6833.2013.01.002]
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水泥土冻胀特性试验研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
34
期数:
2013年01期
页码:
5-9
栏目:
出版日期:
2013-01-16

文章信息/Info

Title:
Experimental Study on Frost Heave Properties of Cement-improved Soil
作者:
鲍俊安; 杨平; 王许诺.
南京林业大学土木工程学院,江苏南京,210037, 南京林业大学土木工程学院,江苏南京,210037, 南京林业大学土木工程学院,江苏南京,210037
Author(s):
BAO Jun-an; YANG Ping; WANG Xu-nuo
College of Civil Engineering，Nanjing Forestry University，Nanjing 210037，China
关键词:
水泥土;  人工冻土;  水泥掺入比;  冻胀
Keywords:
cement-improved soil;  artificial frozen soil; mixing ratio of cement; frost heave
分类号:
TU445
DOI:
10.3969/j.issn.1671-6833.2013.01.002
文献标志码:
A
摘要:
为了从理论上揭示水泥土抑制冻胀的规律,对掺入不同比例水泥的南京地区典型黏土和砂土进行了冻胀试验研究.试验结果表明:黏土质水泥土和砂土质水泥土的冻胀率均随水泥含量增大而减小,随含水率增大呈线性增大,随龄期增大呈指数减小,随温度升高而呈线性增大,随荷载增大呈指数规律减小；且冻胀率与水泥掺入比变化规律均存在一个最佳掺入比,最佳掺入比对应土体较小的冻胀率,南京地区的典型黏土和砂土的最佳掺入比分别为10％、5％.综合分析可得:冻结法施工时,在土体中预先注一定量的水泥浆并将放置一段时间后再冻结,可减小由于冻胀对工程和环境造成的影响.
Abstract:
In order to reveal the law that the cement-improved soil controls frost heave,experimental researcbon frost heave properties were conducted with two typical soils in Nanjing region ,clay and sand,mixed withthe cement. The experiments show that: frost heave coefficient of clay or sand cement-improved soil declinesexponentially with mixing ratio of cement increasing,enhances linearly with moisture content increasing,de-clines exponentially with instar increasing,enhances linearly with the cold junetion temperature increasing, declines exponentially with load increasing besides there is an optimal mixing ratio,while it is the optimal mix-ing ratio,frost heave coefficient of cement-improved soil are lower,the optimal mixing ratio of clay and sandin Nanjing region is 10% and 5% . By comprehensive analysis,when using the freezing method,before freez-ing, a certain amount of cement can be mixed into the clay or sand, and it is necessary to place it for a periodof time,which can reduce frost heave and thaw subsidence,thus reducing the harm to engineering and the en-vironment.

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更新日期/Last Update: 1900-01-01