[1]王建磊,王艳巧,杨广栋,等.干湿循环条件下水泥改性膨胀土变形和强度试验[J].郑州大学学报(工学版),2016,37(04):62-66.[doi:10.13705/j.issn.1671-6833.2016.04.014]
　Wang Jianlei,Wang Yanqiao,Yang Guangdong,et al.Experimental research deformation and shear strength on cement-treated expansive soil[J].Journal of Zhengzhou University (Engineering Science),2016,37(04):62-66.[doi:10.13705/j.issn.1671-6833.2016.04.014]
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干湿循环条件下水泥改性膨胀土变形和强度试验()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
37
期数:
2016年04期
页码:
62-66
栏目:
出版日期:
2016-08-31

文章信息/Info

Title:
Experimental research deformation and shear strength on cement-treated expansive soil
作者:
王建磊; 王艳巧; 杨广栋; 张扬帆; 姜宏雨
1.河海大学水利水电学院,江苏南京,210098;2.合肥工业大学土木与水利工程学院,安徽合肥,230009
Author(s):
1. School of Water Resources and Hydropower, Hehai University, Nanjing, Jiangsu, 210098;2. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui, 230009
关键词:
干湿循环; 膨胀土; 水泥改性; 变形; 强度
Keywords:
wetting-drying cycle; expansive soil; cement treatment; deformation; shear strength
DOI:
10.13705/j.issn.1671-6833.2016.04.014
文献标志码:
A
摘要:
为了探究干湿循环作用对水泥改性膨胀土力学性质的影响,以合肥地铁l号线太湖路车站基坑膨胀土为试验对象,进行了不同水泥掺入比和不同养护龄期的水泥改性膨胀土直剪试验,确定了最佳水泥掺入比以及最佳养护龄期.在此基础上,进行了干湿循环条件下膨胀土和水泥改性膨胀土的胀缩变形试验和直剪试验.试验结果表明:膨胀土的胀缩变形过程并不完全可逆,随干湿循环次数的增多,抗剪强度逐渐减小,绝对胀缩率逐渐增大,并最终趋于稳定;水泥改性后的膨胀土抗剪强度明显提高,水稳性显著提升,胀缩性明显减弱;经水泥改性后,膨胀土受干湿循环作用的影响显著减小.
Abstract:
In order to investigate the influence of dry wet cycling on the mechanical properties of cement modified expansive soil, direct shear tests were conducted on the expansive soil of the Taihu Road station foundation pit of Hefei Metro Line 1 with different cement mixing ratios and curing ages. The optimal cement mixing ratio and curing age were determined. Based on this, We conducted expansion and contraction deformation tests and direct shear tests on expansive soil and cement modified expansive soil under dry wet cycling conditions. The test results showed that the expansion and contraction deformation process of expansive soil is not completely reversible. With the increase of dry wet cycling times, the shear strength gradually decreases, the absolute expansion and contraction rate gradually increases, and ultimately tends to stabilize; After cement modification, the shear strength and water stability of expansive soil are significantly improved, while the expansion and contraction properties are significantly weakened; After cement modification, the influence of dry wet cycling on expansive soil is significantly reduced

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