[1]晏仁,翁运新,晏园,等.裂隙对膨胀土边坡稳定性的影响[J].高速铁路技术,2020,11(05):1-7.[doi:10.12098/j.issn.1674-8247.2020.05.001]
　YAN Ren,WENG Yunxin,YAN Yuan,et al.Influence of Fissure on Stability of Expansive Soil Slope[J].HIGH SPEED RAILWAY TECHNOLOGY,2020,11(05):1-7.[doi:10.12098/j.issn.1674-8247.2020.05.001]
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裂隙对膨胀土边坡稳定性的影响()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
11卷
期数:
2020年05期
页码:
1-7
栏目:
出版日期:
2020-10-28

文章信息/Info

Title:
Influence of Fissure on Stability of Expansive Soil Slope
文章编号:
1674—8247(2020)05—0001-07
作者:
晏仁;  翁运新;  晏园;  申权;  祝方才
1. 湖南工业大学, 湖南 株洲 412007;
2. 中铁二院工程集团有限责任公司, 成都 610031
Author(s):
YAN Ren;  WENG Yunxin;  YAN Yuan;  SHEN Quan;  ZHU Fangcai
1. Hunan University of Technology, Zhuzhou 412007, China;
2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
关键词:
膨胀土边坡|裂隙深度|裂隙倾角|极限上限法|安全系数
Keywords:
expansive soil slope|fissure depth|fissure inclination angle|upper bound method|safety factor
分类号:
TU443
DOI:
10.12098/j.issn.1674-8247.2020.05.001
文献标志码:
A
摘要:
裂隙是边坡稳定性分析中的重要影响因素，裂隙的存在不仅会降低原生膨胀土的强度，还为雨水入渗提供了良好的通道，使膨胀土坡体内孔隙水压力增大，最终导致边坡失稳。本文以云桂铁路沿线膨胀土边坡工程为例，基于极限分析上限理论，建立了考虑裂隙影响的膨胀土边坡稳定性分析方法，探讨了裂隙深度、裂隙倾角等对膨胀土边坡稳定性及锚杆拉力的影响规律。研究结果表明：（1）裂隙深度对边坡安全系数和锚杆拉力的影响较大，安全系数随裂隙深度的增加而减小，锚杆拉力随裂隙深度的增加而增大；（2）裂隙倾角对边坡安全系数和锚杆拉力的影响较小，安全系数随裂隙角度增大稍许减小，锚杆拉力随裂隙倾角的减小缓慢增大；（3）裂隙对边坡安全系数的影响小于地震作用和孔隙水压力，但大于水平膨胀变形力。本文研究成果可为膨胀土地区边坡工程防灾减灾设计和施工提供参考。
Abstract:
Fissure is an important influencing factor in slope stability analysis. It will not only reduce the strength of primary expansive soil, but also provide a good channel for rainwater infiltration, which will increase pore water pressure in expansive soil slope and eventually lead to slope instability. In the paper, taking the expansive soil slope construction along Nanning-Kunming Railway as an example, based on the upper bound theory of limit analysis, the analysis method on the stability of expansive soil slope considering the influence of fissures is established, and the influence rule of fissure depth and inclination angle on expansive soil slope stability and anchor rod tension is discussed. The research results show that:(1) The fissure depth has a great influence on the slope safety factor and anchor rod tension. With the increase of fissure depth, the safety factor decreases and the anchor rod tension increases. (2) The fissure inclination angle has little influence on the slope safety factor and anchor rod tension. The safety factor decreases slightly with the increase of fissure angle and the anchor rod tension increases slowly with the decrease of fissure inclination angle. (3) The influence of fissures on the slope safety factor is less than earthquake action and pore water pressure, but greater than horizontal expansion deformation force. The research results in the paper can provide a reference for the design and construction of slope construction on disaster prevention and mitigation in expansive soil areas.

备注/Memo

备注/Memo:
作者简介:晏仁(1989-),女,硕士研究生。基金项目:国家自然科学基金（41672296，51878667，51678571），湖南省教育厅科学研究项目（18C0501）引文格式:晏仁, 翁运新, 晏园, 等. 裂隙对膨胀土边坡稳定性的影响[J]. 高速铁路技术,2020,11(5):1-7.YAN Ren,WENG Yunxin, YAN Yuan,et al. Influence of Fissure on Stability of Expansive Soil Slope[J]. High Speed Railway Technology, 2020, 11(5):1-7.
更新日期/Last Update: 2020-10-28