[1]李强,蔡舒凌,俞翔,等.降雨及水位骤降作用下膨胀土边坡换填加固效果数值研究[J].江苏水利,2025,(08):49-57.
 LI Qiang,CAI Shuling,YU Xiang,et al.Numerical study on replacement and reinforcement effect of expansive soil slope under rainfall and sudden water level drop[J].JIANGSU WATER RESOURCES,2025,(08):49-57.
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降雨及水位骤降作用下膨胀土边坡换填加固效果数值研究()

《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2025年08期
页码:
49-57
栏目:
水利工程建设
出版日期:
2025-08-01

文章信息/Info

Title:
Numerical study on replacement and reinforcement effect of expansive soil slope under rainfall and sudden water level drop
文章编号:
1007-7839(2025)08-0049-0009
作者:
李强1蔡舒凌2俞翔3张福海34刘峥嵘3
(1. 南京诚明建设咨询有限公司,江苏 南京210012;2. 南京城市建设管理集团有限公司,江苏 南京210006;3. 河海大学 岩土力学与堤坝工程教育部重点实验室,江苏 南京210098;4. 河海大学 疏浚技术教育部工程研究中心,江苏 常州213022)
Author(s):
LI Qiang1 CAI Shuling2 YU Xiang3 ZHANG Fuhai34 LIU Zhengrong3
(1. Nanjing Chengming Construction Consulting Co., Ltd., Nanjing 210012, China;2. Nanjing Urban Construction Management Group Co., Ltd., Nanjing 210006, China;3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;4. Engineering Research Center of Dredging Technology of Ministry of Education, Hohai University, Changzhou 213022, China)
关键词:
膨胀土边坡降雨改良土换填边坡稳定性有限差分法
Keywords:
expansive soil slope rainfall improved soil replacement slope stability finite difference method
分类号:
TU43
文献标志码:
A
摘要:
为探究降雨及水位骤降作用下膨胀土边坡换填加固效果,以南京秦淮东河一期工程典型膨胀土边坡断面为研究对象,分析了水泥改良膨胀土的可行性,并基于FLAC3D软件建立了有限差分边坡模型,对不同换填深度及工况下膨胀土边坡的水分场和稳定性开展了分析。研究结果表明:换填法加固表层膨胀土可提高土体强度、减少降雨入渗量从而显著提高边坡稳定性;边坡安全系数与换填深度呈非线性关系,换填深度较小时,边坡发生局部浅层滑动,通过增加换填深度可使得滑动面下移并过渡到深层整体滑动,这一过程中边坡安全系数随换填深度的提高迅速增加,当潜在滑
Abstract:
To explore the replacement and reinforcement effect of expansive soil slopes under rainfall and sudden water level drop, the typical expansive soil slope section of the first-phase project of Nanjing Qinhuai East River is taken as the research object. The feasibility of cement-modified expansive soil is analyzed, and a finite difference slope model is established based on FLAC3D software. The moisture field and stability of expansive soil slopes under different replacement depths and working conditions are analyzed in this study. The research results show that: Reinforcement of surface expansive soil by replacement method can improve soil strength, reduce rainfall infiltration, and thus significantly enhance slope stability; the safety factor of the slope has a non-linear relationship with the replacement depth. When the replacement depth is small, local shallow sliding occurs in the slope. Increasing the replacement depth can cause the sliding surface to move downward and transition to deep overall sliding. During this process, the slope safety factor increases rapidly with the increase of replacement depth. When there is no fractured expansive soil on the potential sliding surface, slope stability is hardly affected by the replacement depth.

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备注/Memo

备注/Memo:
收稿日期:2025-05-29
基金项目:国家自然科学基金资助项目(51778211)
作者简介:李强(1971—),男,高级工程师,本科,主要从事建筑、市政、水利工程等工程管理工作。E-mail:2942421045@qq.com
通信作者:刘峥嵘(1997—),男,博士研究生,主要从事软土地基方面研究。E-mail:97zrliu@hhu.edu.cn
更新日期/Last Update: 2025-08-01