考虑桩间土拱效应的抗滑桩加固边坡稳定性分析  

Stability Analysis on Slopes Reinforced by Using Anti-slide Piles Considering Soil Arching Effect Between Piles

作　　者：赵子豪 张海旭 杜威 吴凤元 ZHAO Zihao;ZHANG Haixu;DU Wei;WU Fengyuan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,Liaoning,China;Key Laboratory of Ministry of Education for Geomechanics and Embankement Engineering,Hohai University,Nanjing 210098,Jiangsu,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098,Jiangsu,China;Central China Branch of China State Construction Railway Investment and Engineering Group Co.,Ltd.,Nanchang 330038,Jiangxi,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [3]河海大学江苏省岩土工程技术工程研究中心,江苏南京210098 [4]中建铁路投资建设集团有限公司华中分公司,江西南昌330038

出　　处：《济南大学学报(自然科学版)》2025年第1期78-86,98,共10页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(52008268,52378357);辽宁省自然科学基金项目(2022-BS-195);教育部“春晖计划”合作科研项目(HZKY20220416);辽宁省教育厅高校基本科研项目(JYTMS20231608);沈阳市优秀中青年科技人才项目(RC230805)。

摘　　要：针对抗滑桩加固边坡稳定性的已有研究并未考虑由桩间土拱效应引起的土体主应力旋转对边坡稳定性影响的不足,基于由桩间土拱效应引起主应力旋转的土压力统一表达式以及抗滑桩抗滑力的完善计算公式,修正抗滑桩加固边坡稳定性的三维旋转破坏机制,并基于修正后的机制分析边坡的安全系数和滑动面。结果表明:相对于已有研究,当考虑桩间土拱效应所引起的土体主应力旋转时,所得边坡的安全系数更大;土体的性质与土体的内摩擦角、黏聚力有关,当内摩擦角、黏聚力增大时,边坡的安全系数增大,边坡的最深滑动面位置随着内摩擦角的增大而逐渐变浅,随着黏聚力的增大而逐渐变深;当边坡的宽高比与坡角增大时,边坡的安全系数减小,抗滑桩的最有效安装位置更接近坡顶。In view of the deficiency that influences of soil principal stress rotation caused by soil arching effect between piles on slope stability was not considered by previous study on stability of slopes reinforced by using anti-slide piles,on the basis of unified expressions of earth pressure with principal stress rotation caused by soil arching effect between piles and improved calculation formulas for anti-slide force of anti-slide piles,three-dimensional rotating failure mechanism on stability of slopes reinforced by using anti-slide piles was modified.On the basis of the modified mechanism,factors of safety and slip surfaces of slopes were analyzed.The results show that when the soil principal stress rotation caused by soil arching effect between piles is considered,the slope safety factor is larger than that in the previous study.Soil properties are related to the internal friction angle and the cohesion of soils.With the increase of the internal friction angle and the cohesion,the slope safety factor increases.Position of the deepest slip surface gradually becomes shallow with the increase of the internal friction angle,and gradually becomes deep with the increase of the cohesion.When the ratio of width to height and the slope angle increase,the slope safety factor decreases,and the most effective installation position of anti-slide piles is closer to the slope top.

关 键 词：边坡稳定性 三维旋转破坏机制 抗滑力 土拱效应 主应力旋转 安全系数 

分 类 号：TU432[建筑科学—岩土工程]