According to the failure mode of expansive soil slope induced by expansion effect and the monitoring result of on-site simulation test, we summarize the techniques of expansive soil slope treatment. Furthermore, we compare and analyse the effectiveness of four treatment measures (cement soil modification, geogrid reinforcement, geomembrane, and geotextile bags filling) by evaluating the slope deformation and the variation of moisture content. Results reveal that cement soil (replacement of non-expansive clayey soil) has the best performance, whereas geogrid reinforcement is featured with complex techniques, and the compaction degree of geotextile bags filling is hard to control. Finally, we put forward the principles of expansive soil slope treatment.
Key words
South-to-North Water Transfer Project /
expansive soil /
construction technique /
slope /
deformation /
water content /
effectiveness assessment
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References
[1] 程展林, 李青云, 郭熙灵, 等. 膨胀土边坡稳定性研究[J]. 长江科学院院报,2011, 28(10):102-111.
[2] 胡 波, 龚壁卫, 程展林. 南阳膨胀土裂隙面强度试验研究[J]. 岩土力学, 2012, 33(10):2942-2946.
[3] 郑建龙,杨和平.公路膨胀土工程[M].北京:人民交通出版社,2009.
[4] 王保田,张福海.膨胀土的改良技术与工程应用[M].北京:科学出版社,2009.
[5] 王保田,张福海,张文慧. 改良膨胀土的施工技术与改良土的性质[J]. 岩石力学与工程学报,2006,25(增1):3157-3161。
[6] 谭 波,杨和平,罗 亦. 土工格栅柔性支护在处治膨胀土路堑滑坡中的应用[J]. 桂林工学院学报,2006,26(2):200-204.
[7] 金英伟. 土工格栅加筋结构在膨胀土堑坡处治中的应用[J]. 中外公路,2008,28(5):54-56.
[8] 雷胜友,丁万涛.加筋纤维抑制膨胀土膨胀性的试验[J]. 岩石力学与工程学报,2005,27(4):483-485.
[9] 张小平,施 斌. 加筋纤维膨胀土的试验研究[J].长江科学院院报,2008,25(4):60-62.
[10]贺行洋,陈益民,张文生,等. 膨胀土化学固化现状及展望[J]. 硅酸盐学报,2003,31(11):1101-1106.
[11]查浦生,刘松玉,杜延军. 石灰-粉煤灰改良膨胀土试验[J]. 东南大学学报(自然科学版),2007,37(2):339-344.
[12]刘斯宏,汪易森.岩土新技术在南水北调工程中的应用研究[J]. 水利水电技术,2009,(8):61-66.
[13]龚壁卫,C.W. W. Ng, 包承纲. 膨胀土渠坡降雨入渗现场试验研究[J]. 长江科学院院报, 2002, 19(增刊):94-97.
[14]詹良通,吴宏伟,包承纲,等.降雨入渗条件下非饱和膨胀土边坡原位监测[J].岩土力学,2003,24(2):151-158.
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