长江科学院院报 ›› 2017, Vol. 34 ›› Issue (5): 53-57.DOI: 10.11988/ckyyb.20160144

• 岩土工程 • 上一篇    下一篇

水泥改性膨胀土防护边坡效果分析

孙慧1, 刘军1, 胡波1, 张泉2   

  1. 1.长江科学院 水利部岩土力学与工程重点实验室,武汉 430010;
    2.河海大学 岩土工程研究所,南京 210098
  • 收稿日期:2016-02-24 修回日期:2016-09-26 出版日期:2017-05-01 发布日期:2017-05-17
  • 作者简介:孙 慧(1980-),女,湖北随州人,高级工程师,博士,主要从事环境岩土方面的工作,(电话)027-82827522(电子信箱)sunhui_hust@126.com。
  • 基金资助:
    国家自然科学基金项目(51108042); 国家科技支撑计划项目(2015BAB07B00); 中央级公益性科研院所基本科研业务费项目(CKSF2016044/YT,CKSF2016272/YT); 水利部科技推广项目(TG1417)

Effect of Cement-modified Expansive Soil in Slope Protection

SUN Hui1, LIU Jun1, HU Bo1, ZHANG Quan2   

  1. 1.Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources,Yangtze River Scientific Research Institute, Wuhan 430010, China;
    2. Geotechnical Research Institute,Hohai University, Nanjing 210098, China
  • Received:2016-02-24 Revised:2016-09-26 Online:2017-05-01 Published:2017-05-17

摘要: 膨胀土具有吸水膨胀、失水收缩的性质,给工程带来极大的危害。为研究水泥改性膨胀土防护边坡效果,选取膨胀土及不同水泥掺量的改性膨胀土进行胀缩特性试验研究。研究结果表明南阳中膨胀土水泥改性的最佳水泥掺量为6%。将其作为防护加固材料换填南水北调中线渠道边坡的表层,并利用测斜管和变形管等仪器设备对其防护效果进行现场监测。监测结果表明:水泥改性膨胀土回填覆盖坡面表层可以解决膨胀土渠坡的浅层失稳问题。

关键词: 水泥改性膨胀土, 南水北调中线, 渠道边坡, 胀缩特性试验, 边坡防护效果

Abstract: Expansive soils have brought great harm to engineering projects due to the properties of water swelling and dehydration shrinkage. In this article, expansion and contraction tests were carried out on expansive soils mixed with varing cement content. Results suggest that the optimum cement dosage was 6%. The modified expansive soil was then used as reinforcement material to replace the surface layer of cannel slope in the middle route of South-to-North Water Transfer Project. The protection effect was field monitored by inclinometer pipe and deformation tube. Results prove that cement-treated expansive soil as a backfill could solve the shallow instability problem of expansive soil slope.

Key words: cement-modified expansive soil, middle route of South-to-North Water Transfer Project, cannel slope, swelling shrinkage test, slope protection effect

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