降雨渗流场分布下边坡稳定性影响因素的探究与分析

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (5): 142-147.

降雨渗流场分布下边坡稳定性影响因素的探究与分析

王江平^*1,2, 席红兵^1,2, 李柏生^1,2, 杨晓宇³

1.甘肃建投天水建设管理有限公司, 甘肃天水 741000;
2.甘肃建投天水绿色装配建筑产业有限公司, 甘肃天水 741000;
3.兰州工业学院土木工程学院, 甘肃兰州 730050

收稿日期:2022-01-11 出版日期:2022-10-28 发布日期:2022-11-21
通讯作者: 王江平(1970-),男,甘肃礼县人,高级工程师. Email:2415893575@qq.com
基金资助:
甘肃省基础研究创新群体项目(20JR10RA205),陇原青年创新创业人才(团队项目)(2020RCXM120),甘肃省知识产权局高价值专利培育和转化项目(20ZSCQ034),兰州市十大科技创新项目(2020-2-11)

Research and analysis on influencing factors of slope stability with rainfall infiltration field distribution

WANG Jiang-ping^1,2, XI Hong-bing^1,2, LI Bo-sheng^1,2, YANG Xiao-yu³

1. GCIGC Tianshui Construction Management LTD, Tianshui 741000, China;
2. GCIGC Tianshui Green Assembly Construction Industry LTD, Tianshui 741000, China;
3. School of Civil Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China

Received:2022-01-11 Online:2022-10-28 Published:2022-11-21

摘要/Abstract

摘要： 针对降雨入渗条件下的边坡稳定性问题,采用非饱和土理论进行了降雨入渗过程的数值计算研究,围绕降雨强度、渗透系数对边坡稳定性的影响进行了4个算例的计算与分析.利用Geo-Studio软件进行了数值模拟,主要研究结论为:(1)土体的基质吸力有利于边坡的稳定,忽略基质吸力得到的结果会严重偏小;(2)降雨强度对低渗透性模型的影响不明显,对于高渗透性模型的影响较大;(3) 坡角处以及坡顶处会出现应力集中,且土体在该位置处的强度较低.上述研究能够为实际工程中边坡的防治提供一定的技术支持.

关键词: 边坡稳定性分析, 降雨入渗, 非饱和土, 基质吸力

Abstract: Aiming at the slope stability problem under rainfall infiltration, the unsaturated soil theory was used to study the numerical calculation of rainfall infiltration process, and four calculation examples were calculated and analyzed for the influence of rainfall intensity and permeability coefficient on slope stability. The main conclusions are as follows: (1) the matric suction of soil is beneficial to the stability of the slope, and the results obtained by ignoring the matric suction will be seriously smaller; (2) the influence of rainfall intensity on the low permeability model is not obvious, but its influence on the high permeability model is greater; (3) The stress concentration occurs at the slope angle and the top of the slope, and the strength of the soil at this position is low. The above research can provide certain technical support for the prevention and control of slope in practical engineering.

Key words: slope stability analysis, rainfall infiltration, unsaturated soil, matric suction

中图分类号:

TU472

王江平, 席红兵, 李柏生, 杨晓宇. 降雨渗流场分布下边坡稳定性影响因素的探究与分析[J]. 兰州理工大学学报, 2022, 48(5): 142-147.

WANG Jiang-ping, XI Hong-bing, LI Bo-sheng, YANG Xiao-yu. Research and analysis on influencing factors of slope stability with rainfall infiltration field distribution[J]. Journal of Lanzhou University of Technology, 2022, 48(5): 142-147.

参考文献

[1] 毕仲辉,翟亚飞,唐彧杰,等.基于有限元强度折减法的降雨入渗基岩型边坡可靠度分析 [J].水利水电技术,2020,51(9):187-192.
[2] 杜京房,仝飞.干湿循环与降雨对黄土边坡稳定性的影响研究 [J].广西大学学报(自然科学版),2020,45(4):783-791.
[3] 刘海波,许宝田,王波.降雨对南京方山边坡稳定性的影响分析 [J].土工基础,2020,34(4):418-422.
[4] 王建洪,田明,邹云丽,等.云南地区降雨诱发堆积体边坡失稳的力学机理研究[J].水利与建筑工程学报,2020,18(4):204-208+227.
[5] XU J S,DU X L.Energyanalysis of geosynthetic-reinforced slope in unsaturated soils subjected to steady flow [J].Journal of Central South University,2019,26(7):1769-1779.
[6] 蔡亚飞,綦春明.渗流-应力耦合及降雨入渗作用下的边坡稳定性分析[J].南华大学学报(自然科学版),2019,33(3):33-39.
[7] 何书,陈飞,刘强,等.稀土矿层厚度对浸矿边坡渗流及稳定性的影响 [J].防灾减灾工程学报,2018,38(3):528-534.
[8] 李帅,林旺照.降雨对系统锚杆加固边坡稳定性的影响 [J].公路,2020,65(4):47-51
[9] 谢强,田大浪,刘金辉,等.土质边坡的饱和-非饱和渗流分析及特殊应力修正 [J].岩土力学,2019,40(3):879-892.
[10] 包小华,廖志广,徐长节,等.不同渗流边界条件下粉砂边坡失稳模型试验研究 [J].岩土力学,2019,40(10):3789-3796.
[11] 宋亚亚,何忠意,朱佩宁,等.降雨入渗对非饱和土边坡稳定性影响的参数研究 [J].水利与建筑工程学报,2019,17(3):72-78.
[12] 许梦飞,姜谙男,段龙梅,等.考虑损伤渗流边坡稳定性数值离心加载法分析 [J].岩土工程学报,2019,41(11):2103-2111.
[13] 杨世豪,苏立君,张崇磊,等.强降雨作用下昔格达边坡渗流特性及稳定性分析 [J].土木与环境工程学报(中英文),2020,42(4):19-27.
[14] 师文豪,杨天鸿.渗流应力耦合作用下顺倾向层状边坡各向异性渗流特征数值模拟 [J].吉林大学学报(地球科学版),2021,51(6):1783-1788.
[15] 马吉倩,付宏渊,王桂尧,等.降雨条件下成层土质边坡的渗流特征 [J].中南大学学报(自然科学版),2018,49(2):464-471.
[16] 谭新,陈善雄,杨明.降雨条件下土坡饱和-非饱和渗流分析 [J].岩土力学,2003,24(3):381-385.
[17] 戚国庆,黄润秋,速宝云,等.岩质边坡降雨入渗过程的数值模拟 [J].岩石力学与工程学报,2003,22(4):625-629.