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[1]吴豪洋,张小强,钟港,等.降雨条件下凝灰质砂岩软化特征及边坡稳定性研究*[J].中国安全生产科学技术,2023,19(12):86-92.[doi:10.11731/j.issn.1673-193x.2023.12.011]
　WU Haoyang,ZHANG Xiaoqiang,ZHONG Gang,et al.Study on softening characteristics of tuffaceous sandstone and slope stability under rainfall conditions[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(12):86-92.[doi:10.11731/j.issn.1673-193x.2023.12.011]
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降雨条件下凝灰质砂岩软化特征及边坡稳定性研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年12期
页码:
86-92
栏目:
职业安全卫生管理与技术
出版日期:
2023-12-31

文章信息/Info

Title:
Study on softening characteristics of tuffaceous sandstone and slope stability under rainfall conditions
文章编号:
1673-193X(2023)-12-0086-07
作者:
吴豪洋; 张小强; 钟港; 宋雄; 崔靖奇
（1.昆明理工大学 国土资源工程学院，云南 昆明 650093；
2.中国电建集团昆明勘测设计研究院有限公司，云南 昆明 650041)
Author(s):
WU Haoyang;  ZHANG Xiaoqiang;  ZHONG Gang;  SONG Xiong;  CUI Jingqi
(1.Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;
2.Kunming Engineering Corporation Limited,Power Construction Corporation of China,Kunming Yunnan 650041,China)
关键词:
凝灰质砂岩; X射线衍射; 次生孔隙率; 劣化特征; 边坡稳定性
Keywords:
tuffaceous sandstone;  X-ray diffraction;  secondary porosity;  deterioration characteristics;  slope stability
分类号:
X951
DOI:
10.11731/j.issn.1673-193x.2023.12.011
文献标志码:
A
摘要:
为了揭示滇西南地区凝灰质砂岩遇水劣化效应及劣化机理，本文以墨临高速凝灰质砂岩为研究对象，采用X射线衍射、偏光显微镜、水理试验以及边坡数值模型进行降雨条件下岩体遇水劣化特征及边坡稳定性分析，提出基于次生孔隙率的劣化程度指标，表征砂岩遇水劣化效应。研究结果表明：凝灰质砂岩遇水后随着Ca2+、K+等阳离子析出，其内部矿物发生水解、迁移等变化，导致岩体宏观开裂、崩解等劣化特征，滑裂面的上缘越靠近坡顶，滑裂面底端向前延伸越多，边坡整体稳定性降低。研究结果可为滇西南地区此类特殊岩土体的边坡稳定性研究提供参考。
Abstract:
In order to reveal the deterioration effect and mechanism of tuffaceous sandstone encountering water in southwest Yunnan,taking the tuffaceous sandstone in Mojiang-Lincang Expressway as the research object,the X-ray diffraction,polarizing microscope,water physics experiment and slope numerical model were used to analyze the deterioration characteristics of rock mass encountering water and slope stability under rainfall conditions,and a deterioration degree index based on secondary porosity was proposed to characterize the deterioration of sandstone encountering water.The results show that with the precipitation of Ca2+,K+ and other cations after encountering water,the internal minerals of tuffaceous sandstone undergo the hydrolysis and migration,resulting in macro-cracking,disintegration and other deterioration characteristics of rock mass.The closer the upper edge of slip surface is to the top of slope,the more the bottom of slip surface extends forward,and the overall stability of slope decreases.The research results can provide reference for the study on slope stability of this kind of special rock and soil mass in southwest Yunnan.

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备注/Memo

备注/Memo:
收稿日期： 2023-07-30
* 基金项目： 国家自然科学基金项目(52304131);中国博士后科学基金面上项目(2023M733318)
作者简介： 吴豪洋，硕士研究生，主要研究方向为边坡工程和岩石力学。
通信作者： 张小强,博士,副教授,主要研究方向为边坡工程和岩石力学。
更新日期/Last Update: 2024-01-07