EN-1离子土壤固化剂对滑坡滑带土扰动样的改性机理研究

雷雯; 项伟

doi:10.3969/j.issn.1001-5485.2014.05.010

PDF(1042 KB)

长江科学院院报 ›› 2014, Vol. 31 ›› Issue (5) : 47-51. DOI: 10.3969/j.issn.1001-5485.2014.05.010

岩土工程

EN-1离子土壤固化剂对滑坡滑带土扰动样的改性机理研究

雷雯^a,项伟^a,b

作者信息 +

Mechanism of Disturbed Sliding Zone Soil Improved by EN-1 Ionic Soil Stabilizer

LEI Wen¹,XIANG Wei^1,2

Author information +

文章历史 +

摘要

采用原子吸收和红外光谱技术分析了EN-1离子土壤固化剂(ISS)的主要作用成分,以黄土坡滑坡滑带土扰动样为研究对象,分别对原土及经ISS处理后的土样进行了一系列物理化学试验。试验结果表明:当ISS配比(ISS与水体积比)为1∶150时,处理后土样的阳离子交换容量、可交换阳离子含量、塑性指数及比表面积降至最低。结合物理化学试验结果,分析了ISS与土体的作用机理。该作用机理为通过润湿、离子吸附、联结包裹等复杂的表面物化反应,降低土体的水敏性,提高土体的水稳定性。由于黏性土的力学性质与黏土矿物的水敏性及水稳定性关系紧密,通过ISS改善黏性土的水敏性及水稳定性为滑带土的改性和滑坡的治理提供了新思路。

Abstract

The physicochemical properties of disturbed soil sample before and after treatment by EN-1 ionic soil stabilizer (ISS) were researched by tests. AAS (atomic absorption) and FITR (infrared spectrum) technique were utilized to analyze the composition of ISS. The disturbed soil samples from the sliding zone of loess landslide was taken as research object. Test results showed that the cation exchange capacity, exchangeable cation capacity, plasticity index and specific surface area of the ISS-treated soil sample decreased to the minimum when the mixture ratio (ISS to water volume) of ISS solution is identified as 1∶150. Furthermore, the mechanism of ISS acting on the soil can be explained as follows: the soil sample’s sensitivity to water was weakened and the soil stability against water was improved through complex surface physicochemical reactions including moistening, cation exchange, absorption and coverage. Since the mechanical property of clay is related with its water sensitivity and stability, to improve the water sensitivity and stability of clay through ISS offers a new thinking for the modification of landslide soil and the landslide treatment.

导出引用

雷雯,项伟. EN-1离子土壤固化剂对滑坡滑带土扰动样的改性机理研究[J]. 长江科学院院报. 2014, 31(5): 47-51 https://doi.org/10.3969/j.issn.1001-5485.2014.05.010

LEI Wen,XIANG Wei. Mechanism of Disturbed Sliding Zone Soil Improved by EN-1 Ionic Soil Stabilizer[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(5): 47-51 https://doi.org/10.3969/j.issn.1001-5485.2014.05.010

中图分类号： TU443

参考文献

[1] 成永刚. 近二十年来国内滑坡研究的现状及动态[J]. 地质灾害与环境保护, 2003, 14(4): 1-5. (CHENG Yong-gang. Current Situation and Developments of Landslide Study in China in Recent Twenty Years [J]. Journal of Geological Hazards and Environment Preservation, 2003, 14(4): 1-5. (in Chinese))
[2] 江鸿彬. 湖北省巴东县黄土坡滑坡深部变形防治方案探讨[J]. 中国地质灾害与防治学报, 2005, 16(1): 53-56. (JIANG Hong-bin. Approach on the Control Plan for Deformation in Depth of Huangtupo Landslide, Badong County in Hubei Province [J]. Chinese Journal of Geological Hazard and Control, 2005, 16(1): 53-56. (in Chinese))
[3] 王中美, 丁坚平, 刘世喜. 化学灌浆在贵州岩溶山区滑坡治理中的应用[J]. 中国地质灾害与防治学报,2008,19(1): 40-44. (WANG Zhong-mei, DING Jian-ping, LIU Shi-xi. Application of the Chemical Grouting in the Treatment of the Landslide in Karst Area of Guizhou Province [J]. Chinese Journal of Geological Hazard and Control, 2008, 19(1): 40-44. (in Chinese))
[4] 熊厚金, 林天建, 李宁. 岩土工程化学[M]. 北京:科学出版社, 2009. (XIONG Hou-jin, LIN Tian-jian, LI Ning. Geotechnical Chemistry [M]. Beijing: Science Press, 2009. (in Chinese))
[5] 陈彦生, 董建军. 离子土壤强化剂(ISS)丛书之一:离子土壤强化剂(ISS)施工指南[M]. 武汉: 武汉工业大学出版社, 1999. (CHEN Yan-sheng, DONG Jian-jun. Ionic Soil Stabilizer Book Series One: ISS Construction Guide[M]. Wuhan: Wuhan University of Technology Press, 1999. (in Chinese))
[6] 徐海清. 离子土固化剂加固滑带土研究 [D]. 武汉: 中国地质大学, 2008. (XU Hai-qing. Research on Sliding Soil Reinforced by Ionic Soil Stabilizer[D]. Wuhan: China University of Geoscience, 2008. (in Chinese))
[7] 项伟,崔德山,刘莉. 离子土固化剂加固滑坡滑带土的试验研究[J]. 地球科学—中国地质大学学报, 2007, 32(3): 397-402. (XIANG Wei,CUI De-shan,LIU Li. Experimental Study on Sliding Soil of Ionic Soil Stabilizer-Reinforces [J]. Earth Science:Journal of China University of Geosciences, 2007, 32(3): 397-402. (in Chinese))
[8] 汪益敏,刘小兰,陈页开,等. 离子型土固化材料对膨胀土的加固机理试验研究[J]. 公路交通科技, 2009, 26(10): 6-10. (WANG Yi-min,LIU Xiao-lan,CHEN Ye-kai, et al. Experiment of Strengthening Mechanism of Swelling Soil Using ISS [J]. Journal of Highway and Transportation Research and Development, 2009, 26(10): 6-10. (in Chinese))
[9] 刘清秉,崔德山,项伟,等. 离子土固化剂改良膨胀土的机理研究[J]. 岩土工程学报, 2011, 33(4): 648-654. (LIU Qing-bing,CUI De-shan,XIANG Wei, et al. Mechanism of Expansive Soil Improved by Ionic Soil Stabilizer [J]. Chinese Journal of Geotechnical Engineering,2011, 33(4): 648-654. (in Chinese))
[10]刘清秉,项伟,张伟峰,等. 离子土壤固化剂改性膨胀土的试验研究[J]. 岩土力学, 2009, 30(8): 2286-2290. (LIU Qing-bing,XIANG Wei,ZHANG Wei-feng, et al. Experimental Study of Ionic Soil Stabilizer-improved Expansive Soil [J]. Rock and Soil Mechanics, 2009, 30(8): 2286-2290. (in Chinese))
[11]崔德山,项伟,董建军,等. 离子土壤固化剂加固红黏土的试验研究[J]. 长江科学院院报, 2007, 24(3): 42-45. (CUI De-shan,XIANG Wei,DONG Jian-jun, et al. Experimental Study on Red Clay Reinforced with Ionic Soil Stabilizer [J]. Journal of Yangtze River Scientific Research Institute, 2007, 24(3): 42-45. (in Chinese))
[12]SL237—1999,土工试验规程[S].北京:中国水利水电出版社,1999.(SL237—1999,Specification of Soil Test[S].Beijing:China Water Power Press,1999.(in Chinese))
[13]方云,林彤,谭松林. 土力学[M]. 武汉: 中国地质大学出版社, 2003. (FANG Yun,LIN Tong,TAN Song-lin. Soil Mechanics[M]. Wuhan: China University of Geosciences Press,2003. (in Chinese))
[14]ALPAN I. The Empirical Evaluation of the Coefficient K₀ and K_0r [J]. Soils and Foundations, 1967, 7(1): 31-40.
[15]NAKASE A,KAMEI T,KUSAKABE O. Constitutive Parameters Estimated by Plasticity Index [J]. Journal of Geotechnical Engineering, 1988, 114(7): 844-858.
[16]卢雪松,项伟. 离子土壤固化剂加固红色黏土的比表面积研究[J]. 人民长江, 2011, 42(1): 83-86. (LU Xue-song,XIANG Wei. Experimental Study on Specific Surface Area of Red Clay Strengthened by ISS[J]. Yangtze River, 2011, 42(1): 83-86.(in Chinese))