考虑降雨入渗的高边坡开挖支护稳定性分析  

Analysis of High Slope Excavation Support Stability Considering Rainfall Infiltration

作　　者：阮浩东 郑晓东[1,2] 付建宝[3,4,5,6] 沈一鸣 赵逸博 RUAN Haodong;ZHENG Xiaodong;FU Jianbao;SHEN Yiming;ZHAO Yibo(College of Water Resources and Hydropower,Hebei University of Engineering,Handan 056001,China;Hebei Key Laboratory of Intelligent Water Conservancy,Hebei University of Engineering,Handan 056038,China;CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;Key Laboratory of Geotechnical Engineering of Ministry of Communications,Tianjin 300222,China;Key Laboratory of Geotechnical Engineering of Tianjin,Tianjin 300222,China;Tianjin Key Laboratory of Port Geotechnical Engineering Technology,Tianjin 300222,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056001 [2]河北工程大学河北省智慧水利重点实验室,河北邯郸056038 [3]中交天津港湾工程研究院有限公司,天津300222 [4]中交第一航务工程局有限公司,天津300461 [5]港口岩土工程技术交通运输行业重点实验室,天津300222 [6]天津市港口岩土工程技术重点实验室,天津300222

出　　处：《河南科技》2024年第8期54-59,共6页Henan Science and Technology

基　　金：博士后专项基金项目(SJ200100105);国家重点实验室项目(2019KFKT-15);河北省自然科学基金(E2020402087);河北省水利科研与推广计划项目(2020-11)。

摘　　要：【目的】为研究降雨入渗对多级开挖支护后高边坡的稳定性,针对四川达州市某高边坡工程,基于ABAQUS软件并结合现场工程地质和水文地质条件,建立高边坡开挖降雨渗流模型。【方法】考虑不同降雨条件的影响,引入多层非饱和土计算方法,结合现场监测情况,对降雨工况进行研究,进而研究非饱和土边坡的稳定性。【结果】研究结果表明,孔隙水压、边坡位移与降雨强度和降雨持续时间呈正相关,长时间高强度降雨易使多级开挖的高边坡产生较大滑移。【结论】建议采取边开挖边支护的施工措施。研究成果可为高边坡多级开挖支护的稳定性研究提供一定的参考。[Purposes]In order to study the stability of the high slope after multi-stage excavation and support,a high slope project in Dazhou City,Sichuan Province was established based on ABAQUS software and combined with the site engineering geology and hydrogeological conditions.[Methods]Considering the influence of different rainfall conditions,the calculation method of multilayer unsaturated soil is introduced,and combined with the field monitoring,the rainfall condition is studied,and the stability of unsaturated soil slope is summarized.[Findings]The results show that the pore water pressure and slope displacement are positively correlated with rainfall intensity and rainfall duration,and long-term high intensity rainfall is prone to large slip in multi-stage excavated high slope.[Conclusions]It is suggested to take the construction measures of excavation and support.The results can provide some theoretical reference for the stability research of multi-stage excavation support of high slope.

关 键 词：高边坡 稳定性分析 降雨入渗 多层非饱和土 现场监测 数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]