[1]余 炜,高品红,郑兴民.不同降雨条件下花岗岩残积土边坡稳定性研究[J].华南地震,2024,(03):109-118.[doi:10.13512/j.hndz.2024.03.12]
　YU Wei,GAO Pinhong,ZHENG Xingmin.Stability of Granite Residual Soil Slopes Under Different Rainfall Conditions[J].,2024,(03):109-118.[doi:10.13512/j.hndz.2024.03.12]
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不同降雨条件下花岗岩残积土边坡稳定性研究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年03期
页码:
109-118
栏目:
土木工程防震减灾
出版日期:
2024-09-30

文章信息/Info

Title:
Stability of Granite Residual Soil Slopes Under Different Rainfall Conditions
文章编号:
1001-8662（2024）03-0109-10
作者:
余 炜1; 高品红1; 郑兴民2
1.浙江华东岩土勘察设计研究院有限公司，杭州 310030;2.上海大学 力学与工程科学学院，上海 200444
Author(s):
YU Wei1; GAO Pinhong1; ZHENG Xingmin2
1.Zhejiang Huadong Geotechnical Investigation and Design Institute Co.，Ltd.，Hangzhou 310030，China;2.School of Mechanics and Engineering Science ， Shanghai University ， Shanghai 200444， China
关键词:
边坡; 稳定性; 降雨强度; 降雨时长; 安全系数
Keywords:
Slope; Stability; Rainfall intensity; Rainfall duration; Safety factor
分类号:
P642
DOI:
10.13512/j.hndz.2024.03.12
文献标志码:
A
摘要:
降雨诱发边坡滑坡是世界上最为普遍的地质灾害，为减少相关灾害的发生，以苍南县某边坡为案例，采用Flac3D软件建立了三维应力—渗流—变形耦合的边坡计算模型，分析了不同降雨强度、降雨时长下，边坡土体饱和度、边坡水平位移和塑性区的变化以及边坡安全系数时变规律。结果表明：随着降雨时间的增加，边坡坡面的饱和度由中部向底部发展，逐渐达到饱和状态；在暴雨工况下，边坡斜坡中下部的水平位移最大，达到2.51cm；在长时间降雨的情况下，边坡的破坏形式逐渐由张拉破坏转为剪切破坏；在暴雨工况下，边坡安全系数下降最快，24h后达到1.189，低于标准值，导致边坡失稳。研究成果为类似降雨情况下花岗岩残积土边坡的稳定性研究提出了参考。
Abstract:
Rainfall-induced slope landslide is the most common geological disaster in the world. In order to reduce the occurrence of related disasters， taking a slope in Canglan County as a case study， and a three-dimensional slope calculation model coupling stress-seepage-deformity was established using Flac 3D software. The changes in slope soil saturation，horizontal displacement of slopes，and plastic zone，as well as the time-varying law of slope safety factor under different rainfall intensities and duration，were analyzed. The results show that with the increase in rainfall duration，the saturation of the slope surface develops from the middle to the bottom，gradually reaching saturation；under heavy rainfall conditions，the maximum horizontal displacement of the middle and lower parts of the slope reaches 2.51 cm； under long-term rainfall conditions， the failure mode of the slope gradually changes from tensile failure to shear failure；under heavy rainfall conditions，the slope safety factor decreases the fastest， reaching 1.189 after 24 hours，which is lower than the standard value，resulting in slope instability. The research results provide references for the research on the stability of granite residual soil slopes under similar rainfall conditions.

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备注/Memo

备注/Memo:
收稿日期：2024-02-10
基金项目：国家自然科学基金资助项目（52078285）
作者简介：余炜（1986-），男，工学硕士，高级工程师，主要从事岩土工程设计及研究工作。E-mail：408379275@qq.com
更新日期/Last Update: 2024-09-30