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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

40卷

期数:

2023年03期

页码:

170-179

栏目:

岩土工程

出版日期:

2023-05-20

文章信息/Info

Title:

Stability analysis of high and steep fill snowway roadbed under heavy rainfall condition

文章编号:

1673-2049(2023)03-0170-10

作者:

杨连祥^1,2,翁效林^1,2,胡继波^1,2,雷尚民^1,2

(1. 长安大学 公路学院,陕西 西安 710064; 2. 长安大学 特殊地区公路工程教育部重点实验室,陕西 西安 710064)

Author(s):

YANG Lianxiang^1,2, WENG Xiaolin^1,2, HU Jibo^1,2, LEI Shangmin^1,2

(1.School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China)

关键词:

强降雨;  路基填料;  最优级配;  高陡路基;  失稳

Keywords:

heavy rainfall;  roadbed filling;  optimal gradation;  high and steep roadbed;  instability

分类号:

U416.1

DOI:

10.19815/j.jace.2021.11031

文献标志码:

A

摘要:

为研究降雨入渗对路基稳定的影响规律,以涞源县冬奥会高陡滑雪赛道跳台路基为工程背景,考虑雪道路基填料的级配和降雨强度等因素,建立有限元模型,分析强降雨条件下高陡填方路基的稳定性,并通过离心试验结果验证数值模拟结果的合理性。结果表明:降雨入渗会导致路基位移增大,最大位移量为22.401 cm,孔压由负变正且相对孔压最大值为85 kPa; 随着路基填料级配趋于良好,路基顶面的位移和相对孔压逐渐减小; 随着降雨时间的增加,路基顶面的位移和相对孔压不断减小,位移由22.401 cm减少至12.35 cm,相对孔压由85 kPa减少至37 kPa,路基安全系数下降至1.2; 在降雨强度和时长相同的条件下,填土级配对路基稳定性的影响较大; 降雨强度存在临界值,一旦超过该临界值(150 mm?d^-1),路基位移迅速增大,孔压急速变化,路基失稳时间缩短且破坏程度加剧; 降雨入渗引起的路基滑动破坏往往是浅层滑动,可通过加强路基坡面的防护和排水,减小降雨对路基浅层土体的影响,提高路基的稳定性。

Abstract:

In order to study the influence of rainfall infiltration on the stability of roadbed, the finite element model was established based on the engineering background of the high and steep ski jumping platform roadbed of Laiyuan County Winter Olympic Games, considering the factors such as gradation of snow roadbed filler and rainfall intensity. The stability of high and steep fill roadbed under heavy rainfall conditions was analyzed, and the rationality of numerical simulation results was verified by centrifugal test results. The results show that rainfall infiltration will lead to the increase of roadbed displacement, the maximum displacement is 22.401 cm, the pore pressure changes from negative to positive and the maximum relative pore pressure is 85 kPa. As the gradation of roadbed fill tends to be good, the displacement and relative pore pressure of the top surface of the roadbed gradually decrease. With the increase of rainfall time, the displacement and relative pore pressure of the top surface of the roadbed decrease continuously. The displacement decreases from 22.401 cm to 12.35 cm, the relative pore pressure decreases from 85 kPa to 37 kPa, and the safety factor of the roadbed decreases to 1.2. Under the same rainfall intensity and duration, the fill gradation has a great influence on the stability of roadbed. There is a critical value of rainfall intensity. Once the rainfall intensity exceeds the critical value(150 mm?d^-1), the roadbed displacement increases rapidly, the pore pressure changes rapidly, the roadbed instability time is shortened, and the damage degree is aggravated. The sliding failure of roadbed caused by rainfall infiltration is often shallow sliding. By strengthening the protection and drainage of roadbed slope, the influence of rainfall on shallow soil of roadbed can be reduced and the stability of roadbed can be improved.

参考文献/References:

[1] 杨 锐,张大伟,郝家旺.高山滑雪中心大坡度雪地路基稳定性数值模拟研究[J].施工技术,2020,49(10):44-46.
YANG Rui,ZHANG Dawei,HAO Jiawang.Numerical simulation study on stability of large-slope snow subgrade of alpine skiing center[J].Construction Technology,2020,49(10):44-46.
[2]PRIONO,RAHARDJO H,CHATTERJEA K,et al.Effect of hydraulic anisotropy on soil-water characteristic curve[J].Soils and Foundations,2016,56(2):228-239.
[3]KRISTO C,RAHARDJO H,SATYANAGA A.Effect of variations in rainfall intensity on slope stability in Singapore[J].International Soil and Water Conservation Research,2017,5(4):258-264.
[4]唐 军.高填方边坡在强降雨条件下稳定性分析:以攀枝花机场为例[D].成都:成都理工大学,2014.
TANG Jun.In high fill slope stability analysis under the condition of heavy rainfall by Panzhihua airport as an example[D].Chengdu:Chengdu University of Technology,2014.
[5]LAGERWERFF J V,OGATA G,EAGLE H E.Control of osmotic pressure of culture solutions with polyethylene glycol[J].Science,1961,133(3463):1486-1487.
[6]CAI F,UGAI K.Numerical analysis of rainfall effects on slope stability[J].International Journal of Geomechanics,2004,4(2):69-78.
[7]PHAM H Q,FREDLUND D G,LEE BARBOUR S.A study of hysteresis models for soil-water characteristic curves[J].Canadian Geotechnical Journal,2005,42(6):1548-1568.
[8]FREDLUND D G,XING A Q,HUANG S Y.Predicting the permeability function for unsaturated soils using the soil-water characteristic curve[J].Canadian Geotechnical Journal,1994,31(4):533-546.
[9]卢 宁,LIKOS W J.非饱和土力学[M].韦昌富,侯 龙,简文星,译.北京:高等教育出版社,2012.
LU Ning,LIKOS W J.Unsaturated soil mechanics[M].Translated by WEI Changfu,HOU Long,JIAN Wenxing.Beijing:Higher Education Press,2012.
[10]LI D Q,YANG Z Y,CAO Z J,et al.System reliability analysis of slope stability using generalized subset simulation[J].Applied Mathematical Modelling,2017,46:650-664.
[11]CHO S E,LEE S R.Instability of unsaturated soil slopes due to infiltration[J].Computers and Geotechnics,2001,28(3):185-208.
[12]陈卫卫,常乃坤,宁山超.降雨入渗下的非饱和土质边坡渗流场及稳定分析[C]//《建筑科技与管理》组委会.2015年7月建筑科技与管理学术交流会论文集.北京:《建筑科技与管理》组委会,2015:49-51.
CHEN Weiwei,CHANG Naikun,NING Shanchao.Infiltration in unsaturated soil slope under seepage field and stability analysis[C]// Organizing Committee of Building Technology and Management.Proceedings of July 2015 Building Technology and Management Symposium.Beijing:Organizing Committee of Building Technology and Management.Proceedings of July 2015 Building Technology and Management Symposium.Beijing:Organizing Committee of 15:49-51.
[13]王立中.降雨入渗条件下边坡稳定性分析[J].铁道勘察,2014,40(1):42-43.
WANG Lizhong.Stability analysis of slope under rainfall infiltration[J].Railway Investigation and Surveying,2014,40(1):42-43.
[14]李 宁,许建聪.基于ABAQUS的三维边坡降雨入渗模块的开发及其应用[J].岩土工程学报,2015,37(4):667-674.
LI Ning,XU Jiancong.Development and application of three-dimensional rainfall infiltration module based on ABAQUS[J].Chinese Journal of Geotechnical Engineering,2015,37(4):667-674.
[15]李 宁,许建聪.基于场变量的边坡稳定分析有限元强度折减法[J].岩土力学,2012,33(1):314-318.
LI Ning,XU Jiancong.Strength reduction FEM for slope stability analysis based on field variable[J].Rock and Soil Mechanics,2012,33(1):314-318.
[16]秦鹏飞.极限平衡和数值方法在边坡工程中的应用[J].金属矿山,2020(6):204-209.
QIN Pengfei.Application of limit equilibrium and numerical method in slope engineering[J].Metal Mine,2020(6):204-209.
[17]KIM J,KIM Y,JEONG S,et al.Rainfall-induced landslides by deficit field matric suction in unsaturated soil slopes[J].Environmental Earth Sciences,2017,76(23):808.
[18]罗仁美.印子峪排土场安息角与岩石块度分布规律研究[J].矿冶工程,1995,15(4):16-19.
LUO Renmei.Repose angles and rock size distributions of Yinziyu waste dump[J].Mining and Metallurgical Engineering,1995,15(4):16-19.
[19]张 硕,裴向军,黄润秋,等.黄土填方边坡降雨入渗特征及变形破坏模式的模型试验[J].中国公路学报,2019,32(9):32-41,50.
ZHANG Shuo,PEI Xiangjun,HUANG Runqiu,et al.Model test on seepage characteristics and deformation failure modes of loess fill slope under rainfall[J].China Journal of Highway and Transport,2019,32(9):32-41,50.
[20]魏红卫,赵 凡.饱和渗透系数变异性对边坡破坏概率的影响[J].华南理工大学学报(自然科学版),2021,49(8):95-102.
WEI Hongwei,ZHAO Fan.Influence of saturated permeability coefficient variation on failure probability of slope[J].Journal of South China University of Technology(Natural Science Edition),2021,49(8):95-102.
[21]JEONG S,KIM Y,PARK H,et al.Effects of rainfall infiltration and hysteresis on the settlement of shallow foundations in unsaturated soil[J].Environmental Earth Sciences,2018,77(13):494.
[22]邱 祥,蒋煌斌,欧 健,等.“暂态”饱和-非饱和边坡稳定性分析方法研究[J].中国公路学报,2020,33(9):63-75.
QIU Xiang,JIANG Huangbin,OU Jian,et al.Stability analysis method of “transient” saturated-unsaturated slope[J].China Journal of Highway and Transport,2020,33(9):63-75.
[23]王志强,马晓亮.持续降雨环境下高速公路边坡稳定性影响的数值模拟分析[J].公路工程,2018,43(5):310-315.
WANG Zhiqiang,MA Xiaoliang.Numerical simulation analysis on the stability of highway slope under continuous rainfall environment[J].Highway Engineering,2018,43(5):310-315.

相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2021-11-23
基金项目:陕西省自然科学基础研究计划项目(2019JM-216)
作者简介:杨连祥(1997-),男,工学硕士研究生,E-mail:1368729168@qq.com。
通信作者:翁效林(1980-),男,工学博士,教授,博士生导师,E-mail:49768532@qq.com。

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更新日期/Last Update: 2023-05-20