[1]余 炜,陈 刚,廖克武,等.降雨条件下含软弱夹层花岗岩残积土边坡稳定性分析[J].华南地震,2024,(04):142-150.[doi:10.13512/j.hndz.2024.04.16]
　YU Wei,CHEN Gang,LIAO Kewu,et al.Stability Analysis of Slope with Weak Interbedded Granite Residual Soil Under Rainfall Conditions[J].,2024,(04):142-150.[doi:10.13512/j.hndz.2024.04.16]
点击复制

降雨条件下含软弱夹层花岗岩残积土边坡稳定性分析()
分享到：

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年04期
页码:
142-150
栏目:
土木工程防震减灾
出版日期:
2024-12-30

文章信息/Info

Title:
Stability Analysis of Slope with Weak Interbedded Granite Residual Soil Under Rainfall Conditions
文章编号:
1001-8662（2024）04-0142-09
作者:
余 炜1; 陈 刚1; 廖克武1; 黄海江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; CHEN Gang1; LIAO Kewu1; HUANG Haijiang2
1.Zhejiang Huadong Geotechnical Investigation&Design Institute Co.，Ltd.，Hangzhou 310030，China;2.School of Mechanics and Engineering Science ， Shanghai University ， Shanghai 200444， China
关键词:
降雨入渗; 边坡稳定性; 孔隙水压; 软弱夹层; 塑性区
Keywords:
Rainfall infiltration; Slope stability; Pore water pressure; Softly interbedded rock; Plastic zone
分类号:
TU443
DOI:
10.13512/j.hndz.2024.04.16
文献标志码:
A
摘要:
为研究降雨入渗作用下含软弱夹层边坡稳定性问题，减少滑坡灾害的发生，以实际边坡工程为例，采用有限差分软件建立了三维边坡数值模型，分析了含软弱夹层边坡土体的孔隙水压力、位移场、塑性区、速度场和最大剪应变增量场变化规律，并探究了软弱夹层厚度对边坡稳定性的影响。结果表明：持续性降雨使得软弱夹层处出现贯通连续的剪切塑性区，同时剪切塑性区随着降雨时间增加扩大；随着降雨时间的增加，软弱夹层的位移、孔隙水压力、最大剪应变增量以及滑移速度增大，应力与强度比减小；长时间的降雨使得含软弱夹层边坡沿着软弱夹层所处的潜在滑移面进行滑移，边坡的失稳变形破坏主要由软弱夹层变化所引起，并且变形随降雨时间的增加而加剧；软弱夹层的存在会对夹层上下界面的孔隙水压力大小产生影响，孔隙水压力自坡面向软弱夹层方向逐渐增大；降雨时间的增加和软弱夹层的存在都会降低边坡的稳定性，在降雨条件相同时，边坡的安全系数随软弱夹层厚度的增大而下降。
Abstract:
In order to study the stability of slopes with weak interlayer under rainfall infiltration effect and reduce the occurrence of landslide disasters， an actual slope project was taken as an example， and the finite difference software was used to establish a three-dimensional slope numerical model. The pore water pressure，displacement field， plastic zone， velocity field， and the maximum shear strain increment field of the slopes with weaker interlayer were analyzed，and the influence of the thickness of weak interlayer on slope stability was studied. The results show that continuous rainfall makes a through and continuous shear plastic zone appear at the weak interlayer. At the same time，the shear plastic zone expands with the increase in rainfall time. With the increase in rainfall time，the displacement，pore water pressure，the maximum shear strain increment，and the slip velocity of the weak interlayer increase， and the ratio of stress to strength decreases. The prolonged rainfall makes the slopes with weak interlayer slip along the potential slip surface of the weak interlayer. The destabilizing deformation of the slopes is mainly caused by the change of the weak interlayer， and the deformation is intensified with the increase in rainfall time. The existence of the weak interlayer affects the pore water pressure at the interface between the upper and lower weak interlayer， and the pore water pressure gradually increases from the slope towards the direction of the weak interlayer. The increase in rainfall time and the existence of the weak interlayer both reduce the stability of the slopes. When the rainfall conditions are the same，the safety factor of the slopes decreases with the increase in the thickness of the weak interlayer

参考文献/References:

[1] Kun F ，Huiming T ，Changdong L ，et al. Centrifuge modelling of landslides and landslide hazard mitigation：A review[J]. Geoscience Frontiers，2023，14（1）：101493.
[2]陈丽霞，殷坤龙，刘礼领，等.江西省滑坡与降雨的关系研究[J].岩土力学，2008（04）：1114-1120.
[3]刘广宁，黄波林，王世昌.三峡库区巴东李家湾滑坡变形破坏机理研究[J].人民长江，2016，47（08）：39-42+72.
[4] Xiao Y J，Wang T，Li Y Q. Formation mechanism of complex landslide mass with soft interlayers in reservoir bank[J]. Coal Geology Explor，2018，46（06）：133-137.
[5] Li Q ，Wang M Y，Zhang B K ，et al. Field investigation and numerical study of a siltstone slope instability induced by excavation and rainfall[J].Landslides，2020，17（6）：1-15.
[6] Yan X ，Xu B ，Zhang L，et al. Mechanism analysis of a landslide in highly weathered volcanic rocks of Niushoushan Hill in Nanjing[J]. Environmental Earth Sciences，2019，78 （3-4）：323-337.
[7] Bo L ，Kun H ，Mei H ，et al. Application of UAV and GB-SAR in mechanism research and monitoring of Zhonghaicun landslide in southwest China[J]. Remote Sensing，2021，13 （9）：1653-1653.
[8] Yang Y ，Xing H ，Yang X ，et al. Experimental study on the dynamic response and stability of bedding rock slopes with weak interlayers under heavy rainfall[J]. Environmental Earth Sciences，2018，77（12）：1-16.
[9]王睿，张嘎，张建民.降雨条件下含软弱夹层土坡的离心模型试验研究[J]. 岩土工程学报，2010，32（10）：1582-1587.
[10]甘建军.灰岩区降雨型滑坡软弱夹层的三轴试验强度研究[J].灾害学，2019，34（04）：30-34+72.
[11]姚裕春，姚令侃，袁碧玉.降雨条件下边坡破坏机理离心模型研究[J].中国铁道科学，2004（04）：65-69.
[12] Xu J ，Tang X ，Wang Z ，et al. Investigating the softening of weak interlayers during landslides using nanoindentation experiments and simulations[J]. Engineering Geology，2020 （277）：105801.
[13] Pan Y ，Wu G ，Zhao Z ，et al. Analysis of rock slope stability under rainfall conditions considering the water-induced weakening of rock[J]. Computers and Geotechnics， 2020（128）：103806.
[14] Zhuang Y ，Hu X ，He W ，et al. Stability analysis of a rocky slope with a weak interbedded layer under rainfall infiltra?tion conditions[J]. Water，2024，16（4）：604.
[15] Sun H ，Pan P ，Lü Q ，et al. A case study of a rainfall-in?duced landslide involving weak interlayer and its treatment using the siphon drainage method[J]. Bulletin of Engineer?ing Geology and the Environment，2019，78（6）：4063-4074.
[16]刘杨，胡斌，盛建龙，等.含缓倾软弱夹层矿山高边坡降雨渗流特性研究[J].水利水运工程学报，2021（05）：67-75.
[17]李水江，童艳光，刘飞禹，等.不同含水率下考虑筋土界面刚度软化的加筋边坡地震响应[J].防灾减灾工程学报，2023，43（04）：862-870+877.
[18]刘洪波，梁崇旭，刘飞禹.考虑含水率影响的花岗岩残积土边坡地震响应分析[J].防灾减灾工程学报，2023，43 （02）：342-350.
[19]谢瑾荣，周翠英，程晔.降雨条件下软岩边坡渗流-软化分析方法及其灾变机制[J]. 岩土力学，2014，35（01）：197-203+210.
[20]蒋中明，曾铃，付宏渊，等.极端久雨条件下软岩边坡动态稳定性分析[J].中国公路学报，2014，27（02）：27-34.
[21] Xu Y，Liao X，Li J，et al. The effects of water content and dry-wet cycles of weak-interlayer soil on stability of clastic rock slope[J]. Geotechnical and Geological Engineering，2021，39 （5）：1-8.
[22]钟卓希，盛建龙，胡斌，等.考虑等效裂隙面的含软弱夹层边坡降雨渗流模型[J]. 长江科学院院报，2023，40 （07）：118-124.
[23]侯世伟，张永峰，张皓，等.基于局部软化阶梯双折减法的土坡稳定性研究[J].防灾减灾工程学报，2022，42（04）：705-713.

相似文献/References:

[1]何笃伟,宿文姬,张 伟,等.削坡建房对粤东山区红色砂岩残积土边坡稳定性影响研究[J].华南地震,2022,(02):109.[doi:10.13512/j.hndz.2022.02.15]
　HE Duwei,SU Wenji,ZHANG Wei,et al.Study on the Influence of Artificial Slope Cutting and Building on the Stability of Red Sandstone Residual Soil Slope in Eastern Guangdong Mountainous Area[J].,2022,(04):109.[doi:10.13512/j.hndz.2022.02.15]
[2]郭志峰,宿文姬,张 伟,等.改进Mein-Larson模型的花岗岩残积土边坡降雨入渗研究[J].华南地震,2022,(02):116.[doi:10.13512/j.hndz.2022.02.16]
　GUO Zhifeng,SU Wenji,ZHANG Wei,et al.Study on Rainfall Infiltration of Granite Residual Soil Slope Based on Improved Mein Larson Model[J].,2022,(04):116.[doi:10.13512/j.hndz.2022.02.16]

备注/Memo

备注/Memo:
收稿日期：2024-06-13
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: 2024-12-30