益阳某富水路基边坡稳定性分析
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摘要
基于FLAC3D数值模拟,对益阳鱼形山水库周边浸水路基边坡在天然状态、普通植被混凝土状态以及六角砖支护下边坡变形情况进行了对比分析,发现该路基边坡虽在常水位下处于稳定状态,但在内涝时期边坡安全系数过小,有发生滑坡坍塌的危险;在采用六角砖防护时,安全系数有一定幅度的增加,坡体内浸润线均有效降低,并小于内涝水位。
Herein the deformation of slope along the soaking subgrade surrounding Yuxingshan Reservoir, Yiyang, in natural, general vegetation-concrete, and hexagonal brick supporting conditions were compared and analyzed depending on FLAC3D numerical simulation. It was found that the slope has too small safety factor in the period of waterlogging with the risk of landslide collapse, though it is stable under normal water level; if protected by hexagonal brick, the safety factor increases to certain extent and the phreatic line in the slope is decreased and lower than the level of waterlogging.
Herein the deformation of slope along the soaking subgrade surrounding Yuxingshan Reservoir, Yiyang, in natural, general vegetation-concrete, and hexagonal brick supporting conditions were compared and analyzed depending on FLAC3D numerical simulation. It was found that the slope has too small safety factor in the period of waterlogging with the risk of landslide collapse, though it is stable under normal water level; if protected by hexagonal brick, the safety factor increases to certain extent and the phreatic line in the slope is decreased and lower than the level of waterlogging.
引文
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[2] 张鹏,谢波.公路路基边坡稳定性影响因素敏感性分析[J].山东交通科技,2017(2):45-46,50.ZHANG P,XIE B.Sensitivity analysis of influencing factors on highway subgrade slope stability[J].Shandong Jiaotong Keji,2017(2):45-46,50.
[3] 郭丽丽,苟建强,范大明.红岩寺至景阳公路路基边坡稳定性分析[J].路基工程,2016(1):191-196.GUO L L,GOU J Q,FAN D M.Analysis of subgrade slope stability of Hongyansi-Jingyang highway[J].Subgrade Engineering,2016(1):191-196.
[4] 舒广志.富林水库浸水路基的稳定性分析与防护[D].南昌:江西理工大学,2014.SHU G Z.Stability analysis and protection of Fulin reservoir soaking roadbed[D].Nanchang:Jiangxi University of Science and Technology,2014.
[5] 冯登.公路开挖和改线对顺层边坡稳定性的影响分析[J].五邑大学学报 (自然科学版),2018,32(1):73-78.FENG D.An analysis of the effect of highway excavation or rerouting on the stability of bedding slopes[J].Journal of Wuyi University (Natural Science),2018,32(1):73-78.
[6] 陶丽娜,阎宗岭,贾学明,等.库水位变化对路基边坡稳定性的影响研究[J].公路交通技术,2014(1):1-6.TAO L N,YAN Z L,JIA X M,et al.Research on influences of reservoir water level changes on stability of roadbed slopes[J].Technology of Highway and Transport,2014(1):1-6.
[7] 马长复.水库库区边坡安全监测分析及加固措施[J].吉林水利,2018(2):60-62.MA C F.Slope monitoring analysis and reinforcement measures in reservoir area[J].Jilin Water Resources,2018(2):60-62.
[8] 陈风光,史卫国.水位下降对沿河路基边坡稳定性的影响分析[J].路基工程,2016(6):36-39,44.CHEN F G,SHI W G.Effect analysis of water level drop on stability of subgrade slope along river[J].Subgrade Engineering,2016(6):36-39,44.
[9] 陈开圣,方琴,熊岚.路基边坡稳定性评价方法研究[J].路基工程,2009(1):26-27.CHEN K S,FANG Q,XIONG L.Evaluation method of roadbed slope stability[J].Subgrade Engineering,2019(1):26-27.
[10] 金在保.植被混凝土板墙在边坡支护中的特性分析[D].镇江:江苏科技大学,2015.JIN Z B.Performance of vegetation-growing concrete plate wall in slope support analysis[D].Zhenjiang:Jiangsu University of Science and Technology,2015.
[11] GB50330—2002 建筑边坡工程技术规范[S].北京:中国建筑工业出版社,2002.GB50330—2002 Technical Code for Building Slope Engineering[S].Beijing:China Building Industry Press,2002.