强降雨条件下考虑气压和渗流作用的边坡稳定性

doi:10.16183/j.cnki.jsjtu.2021.302

上海交通大学学报 ›› 2022, Vol. 56 ›› Issue (6): 739-745.doi: 10.16183/j.cnki.jsjtu.2021.302

强降雨条件下考虑气压和渗流作用的边坡稳定性

姚茂宏, 陈铁林(), 樊容, 杨子力, 石野

北京交通大学城市地下工程教育部重点实验室,北京 100044

收稿日期:2021-08-12 出版日期:2022-06-28 发布日期:2022-07-04
通讯作者: 陈铁林 E-mail:tlchen1@bjtu.edu.cn
作者简介:姚茂宏(1994-),男,四川省凉山州人,博士生,从事岩土工程稳定性方面的研究.
基金资助:
中央高校基本科研业务费专项资金(2021YJS114);中国国家铁路集团有限公司科技研究开发计划重大课题(K2019G042)

Slope Stability Considering the Effects of Air Pressure and Seepage Under Heavy Rainfall Conditions

YAO Maohong, CHEN Tielin(), FAN Rong, YANG Zili, SHI Ye

Key Laboratory for Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China

Received:2021-08-12 Online:2022-06-28 Published:2022-07-04
Contact: CHEN Tielin E-mail:tlchen1@bjtu.edu.cn

摘要/Abstract

摘要：

降雨入渗分析是预测工程灾害的重要手段之一.为了有效分析强降雨条件下边坡入渗过程,在经典Green-Ampt模型的基础上,建立了初始含水率在天然非均布条件下,考虑饱和带渗流和气压作用的边坡降雨入渗模型,并推导了相应的边坡稳定性系数表达式.研究表明:降雨入渗受边坡尺寸的影响明显,一方面,湿润锋迁移速率随坡长的增加而增加;另一方面,当考虑气压作用时,坡长越小,达到相同的湿润锋深度所需时间越长,当坡长增大到一定程度后,差别不大.此外,渗透力对边坡稳定性的影响比气压大,因为前者在降雨过程中逐渐增大,而后者基本不变,所以渗透力影响越来越大,气压影响越来越小.

关键词: 降雨入渗, 初始含水率, 饱和带渗流, 封闭气压, 边坡稳定

Abstract:

Rainfall infiltration analysis is one of the important methods for predicting engineering disasters. In order to effectively analyze the infiltration process of slope under heavy rainfall, based on the classical Green-Ampt model, a slope rainfall infiltration model considering the effect of saturated zone seepage and air pressure under the condition of non-uniform distribution of initial water content was established, and the corresponding expression of landslide stability coefficient was derived. The results show that the influence of slope size on rainfall infiltration is obvious. On the one hand, the expansion rate of wetting front increases with the increase of slope length, on the other hand, when considering the effect of air pressure, the smaller the slope length, the longer it takes to reach the same wet front. When the slope length increases to a certain extent, the difference is not obvious. In addition, the influence of seepage force on slope stability is greater than that of air pressure. Because the former gradually increases during the rainfall process while the latter is basically unchanged, the influence of seepage force increases, and the influence of air pressure decreases.

Key words: rainfall infiltration, initial water content, seepage in saturated zone, closed air pressure, slope stability

中图分类号:

TU42

姚茂宏, 陈铁林, 樊容, 杨子力, 石野. 强降雨条件下考虑气压和渗流作用的边坡稳定性[J]. 上海交通大学学报, 2022, 56(6): 739-745.

YAO Maohong, CHEN Tielin, FAN Rong, YANG Zili, SHI Ye. Slope Stability Considering the Effects of Air Pressure and Seepage Under Heavy Rainfall Conditions[J]. Journal of Shanghai Jiao Tong University, 2022, 56(6): 739-745.

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参考文献 18

[1]	CHO S E, LEE S R. Instability of unsaturated soil slopes due to infiltration[J]. Computers & Geotechnics, 2001, 28(3): 185-208.
[2]	GREEN W H. Studies on soil physics. Part 1: The flow of air and water through soils[J]. Agricultural Science, 1911, 4(1): 1-24.
[3]	MEIN R G, LARSON C L. Modeling infiltration during a steady rain[J]. Water Resources Research, 1973, 9(2): 384-394. doi: 10.1029/WR009i002p00384 URL
[4]	GAVIN K, XUE J. A simple method to analyze infiltration into unsaturated soil slopes[J]. Computers and Geotechnics, 2008, 35(2): 223-230. doi: 10.1016/j.compgeo.2007.04.002 URL
[5]	CHEN L, YOUNG M H. Green-Ampt infiltration model for sloping surfaces[J]. Water Resources Research, 2006, 42(7): 887-896.
[6]	李宁, 许建聪, 钦亚洲. 降雨诱发浅层滑坡稳定性的计算模型研究[J]. 岩土力学, 2012, 33(5): 1485-1490.
	LI Ning, XU Jiancong, QIN Yazhou. Research on calculation model for stability evaluation of rainfall-induced shallow landslides[J]. Rock & Soil Mechanics, 2012, 33(5): 1485-1490.
[7]	汪丁建, 唐辉明, 李长冬, 等. 强降雨作用下堆积层滑坡稳定性分析[J]. 岩土力学, 2016(2): 439-445.
	WANG Dingjian, TANG Huiming, LI Changdong, et al. Stability analysis of colluvial landslide due to heavy rainfall[J]. Rock and Soil Mechanics, 2016(2): 439-445.
[8]	LIU Z, YAN Z, DUAN J, et al. Infiltration regulation and stability analysis of soil slope under sustained and small intensity rainfall[J]. Journal of Central South University, 2013, 20(9): 2519-2527. doi: 10.1007/s11771-013-1764-8 URL
[9]	张洁, 吕特, 薛建锋, 等. 适用于斜坡降雨入渗分析的修正Green-Ampt模型[J]. 岩土力学, 2016, 37(9): 2451-2457.
	ZHANG Jie, LV Te, XUE Jianfeng, et al. Modified Green-Ampt model for analyzing rainfall infiltration in slopes[J]. Rock and Soil Mechanics, 2016, 37(9): 2451-2457.
[10]	简文星, 蒋毅. 基于指数型的浅层滑坡非积水降雨入渗模型研究[J]. 安全与环境工程, 2017, 24(1): 22-25.
	JIAN Wenxing, JIANG Yi. Exponential model of rainfall infiltration of shallow landslides for non-ponding conditions[J]. Safety and Environmental Engineering, 2017, 24(1): 22-25.
[11]	潘永亮, 简文星, 李林均, 等. 基于改进Green-Ampt模型的花岗岩残积土边坡降雨入渗规律研究[J]. 岩土力学, 2020, 41(8): 2685-2692.
	PAN Yongliang, JIAN Wenxing, LI Linjun, et al. Research on rainfall infiltration law of granite residual soil slope based on improved Green-Ampt model[J]. Rock and Soil Mechanics, 2020, 41(8): 2685-2692.
[12]	王千, 曾德超. 预测湿润锋进程的新方法[J]. 农业工程学报, 1993(1): 24-29.
	WANG Qian, ZENG Dechao. A new method for predicting the progress of the wet front[J]. Transactions of the CSAE, 1993(1): 24-29.
[13]	韩同春, 马世国, 徐日庆. 强降雨条件下气压对滑坡延时效应研究[J]. 岩土力学, 2013, 34(5): 1360-1366.
	HAN Tongchun, MA Shiguo, XU Riqing. Research on delayed effect of landslides caused by air pressure under heavy rainfall[J]. Rock and Soil Mechanics, 2013, 34(5): 1360-1366.
[14]	马世国. 强降雨条件下基于Green-Ampt入渗模型的无限边坡稳定性研究[D]. 杭州: 浙江大学, 2014.
	MA Shiguo. Study on the stability of infinite slope based on Green-Ampt infiltration model under intense rainfall[D]. Hangzhou: Zhejiang University, 2014.
[15]	王继成, 俞建霖, 龚晓南, 等. 大降雨条件下气压力对边坡稳定的影响研究[J]. 岩土力学, 2014, 35(11): 3157-3162.
	WANG Jicheng, YU Jianlin, GONG Xiaonan, et al. Research on effect of closed air pressure on slope stability under intense rainfall[J]. Rock and Soil Mechanics, 2014, 35(11): 3157-3162.
[16]	WANG Z, FEYEN J, VAN GENUCHTEN M T, et al. Air entrapment effects on infiltration rate and flow instability[J]. Water Resources Research, 1998, 34(2): 213-222. doi: 10.1029/97WR02804 URL
[17]	GRISMER M E, ORANG M N, CLAUSNITZER V, et al. Effects of air compression and counterflow on infiltration into soils[J]. Journal of Irrigation & Drainage Engineering, 2016, 120(4): 775-795.
[18]	SHAKOOR A, SMITHMYER A J. An analysis of storm-induced landslides in colluvial soils overlying mudrock sequences, southeastern Ohio, USA[J]. Engineering Geology, 2005, 78(3/4): 257-274. doi: 10.1016/j.enggeo.2005.01.001 URL

强降雨条件下考虑气压和渗流作用的边坡稳定性

Slope Stability Considering the Effects of Air Pressure and Seepage Under Heavy Rainfall Conditions

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