摘要
针对新型抗滑支挡结构——三排阶梯形抗滑桩,以某填方边坡为例,采用有限差分法FLAC3D探讨了三排阶梯形抗滑桩的受力特征、支护效果以及岩土参数对抗滑桩受力特性的影响。研究表明:三排阶梯形抗滑桩各组成构件具有共同作用、协调变形,侧向刚度大、抵抗侧向变形能力强的特点,在边坡填方中,便于施工,能很好地抑制坡体变形;三排阶梯形抗滑桩工作时,在桩梁搭接处易产生拉应力集中,且后桩桩背受拉最强,中桩次之,前桩最弱,下部横梁易产生剪应力集中,且下梁受剪高于上梁;随着回填土内摩擦角的减小,抗滑桩各构件内力逐渐增大,且增加幅度越来越大;随着填土内摩擦角的增大,抗滑桩变形逐渐减小,且幅度越来越小。
In view of a new type of anti-slide retaining structure—three rows of stepped anti-sliding piles,based on a certain actual filling slope,the mechanical characteristics,supporting effects,and influence of geotechnical parameters on mechanical characteristics of three rows of stepped anti-slide piles were discussed by the finite difference software FLAC3D.The analysis results indicated that the members of stepped anti-slide piles were of the collaborative work,coordinated deformation,large lateral stiffness,strong resistance to lateral deformation and convenient construction during filling of slopes,which could better constrain the deformation of slopes.the tensile stress concentration was easy to occur at connections between piles and beams;the tension in the back of rear piles was largest and took the second place in intermediate piles,the tension in the front pile was smallest.The lower beam was prone to shear stress concentration,and the lower beam was sheared stronger than the upper beam;as the internal friction angle of the backfill decreased,the internal forces in each member of the anti-slide piles increased,and the growth rates were increasing.With the increase of the internal friction angle of fillers,the deformation of antislide piles gradually decreased,and the growth rates were decreasing.
作者
陈权川
萧诗礼
朱爱军
李兰
陈权益
CHEN Quanchuan;XIAO Shili;ZHU Aijun;LI Lan;CHEN Quanyi(Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550081,China;College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China;College of Civil Engineering,Guizhou University,Guiyang 550025,China;Guiyang Architectural Survey Design Co.,Ltd.,Guiyang 550009,China;Bureau of Agriculture and Rural Affairs of Xifeng County,Guiyang 551100,China;School of Materials and Architecture Engineering,Guizhou Normal University,Guiyang 550025,China)
出处
《工业建筑》
北大核心
2023年第8期184-190,153,共8页
Industrial Construction
基金
国家自然科学基金项目(51468008)
贵州省科技计划项目(黔科合基础[2018]1107,黔科合基础[2019]1075)
贵州省水利厅科技专项经费项目(KT201804)
贵州省土木工程一流学科建设项目(QYNYL[2017]0013)。
关键词
填方边坡
h形抗滑桩
三排阶梯形抗滑桩
受力特性
数值模拟
filling slope
h-type anti-slide pile
three-row stepped anti-slide pile
mechanical property
numerical simulation