长江科学院院报 ›› 2018, Vol. 35 ›› Issue (8): 90-94.DOI: 10.11988/ckyyb.20170221

• 岩土工程 • 上一篇    下一篇

SH固化剂复配无机材料加固黄土抗侵蚀试验研究

李崇清a,刘清秉b,项伟a,b,王菁莪b,乔宇b   

  1. 中国地质大学(武汉) a.教育部长江三峡库区地质灾害研究中心; b.工程学院,武汉 430074
  • 收稿日期:2017-03-06 出版日期:2018-08-01 发布日期:2018-08-14
  • 通讯作者: 刘清秉(1984-),男,安徽无为人,副教授,博士,从事岩土工程稳定性评价、地质灾害防治等方面的教学与科研工作。E-mail:liuqingbing_1357@163.com
  • 作者简介:李崇清(1991-),男,湖北襄阳人,硕士研究生,主要研究方向为黄土地区水土保持。E-mail:893613533@qq.com
  • 基金资助:
    国家自然科学基金项目(41672297,41572286)

Anti-erodibility of Loess Subgrade Slope Reinforced with SH-Polymer and Inorganic Material

LI Chong-qing1, LIU Qing-bing2, XIANG Wei1,2, WANG Jing-e2, QIAO Yu2   

  1. 1.Research Center on Geo-hazard in the Three Gorges Reservoir Area under Ministry of Education, China University of Geosciences, Wuhan 430074, China;
    2.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
  • Received:2017-03-06 Online:2018-08-01 Published:2018-08-14

摘要: 在强降雨作用下,黄土路基边坡坡面土体易发生侵蚀,对道路工程和行车安全造成危害。为分析不同固化材料对黄土边坡抗侵蚀性能的改良效果,利用人工降雨模拟试验,对高分子材料SH、水泥和石灰3种固化剂掺入后坡体的抗侵蚀能力进行对比研究,采用产流时间、总产沙量和总径流量等指标进行定量评价,并分析了不同固化剂对黄土边坡抗侵蚀性能的影响机理。试验结果表明:SH固化剂能够降低边坡的产沙速率和产沙量,其浓度为8%时提升效果最佳,继续增加浓度后提升效果不明显;石灰、水泥在降低产沙速率和减少产沙量方面优于SH,但会大幅度降低坡体的渗透性能,导致产流时间提前和坡面径流量增加;将3种固化剂复合掺入后可以弥补单一固化剂的缺点,全面有效地提高黄土边坡的抗侵蚀能力。

关键词: 路基边坡, 黄土, 土壤侵蚀, SH固化剂, 复合材料, 人工降雨试验, 抗侵蚀试验

Abstract: Loess subgrade slope is subjected to erosion under heavy rain,which is detrimental to highway mainte-nance and driving safety.The anti-erodibility of loess slope reinforced by SH-polymer,cement,and lime,respectively, are examined comparatively through artificial rainfall test. Indicators inclusive of runoff start time, total sediment yield, and total runoff volume are quantitatively evaluated, and the effect of different soil stabilizers on anti-erodibility is analyzed. Results reveal that a 8% concentration of SH-polymer could reduce sediment yield and sediment yield rate to the optimum; yet increasing the concentration over 8% makes no further obvious contribution. Cement and lime are superior than SH-polymer in reducing sediment yield rate and sediment yield volume, but would also reduce the permeability of slope remarkably, bring about runoff in advance and larger runoff volume. By combining the three stabilizers, the shortcomings of each single stabilizer can be compensated, and the anti-erodibility of loess subgrade slope can be improved comprehensively.

Key words: subgrade slope, loess, soil erosion, SH-Polymer, composite material, artificial rainfall test, anti-erodibility test

中图分类号: