挡墙荷载下刚性桩复合地基承载性状研究  

Research on bearing behavior of rigid pile composite foundation under retaining wall load

作　　者：黄志波[1,2] 吴能森 林奇 詹素华 郑春婷 HUANG Zhi-bo;WU Neng-sen;LIN Qi;ZHAN Su-hua;ZHENG Chun-ting(Jinshan College,Fujian Agriculture and Forestry University,Fuzhou 350002,China;College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China;College of Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;Fujian Jianzhuan Geotechnical Engeering Co.Ltd,Fuzhou 350007,China)

机构地区：[1]福建农林大学金山学院,福州350002 [2]福建农林大学交通与土木工程学院,福州350108 [3]福建工程学院土木工程学院,福州350118 [4]福建省建专岩土工程有限公司,福州350007

出　　处：《哈尔滨商业大学学报（自然科学版）》2021年第5期601-606,共6页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：福建省中青年教师教育科研项目(JT180841);福建农林大学科技创新项目(KFA17254A)。

摘　　要：基于实际工程采用FLAC 3D软件建立挡土墙下刚性桩复合地基的数值分析模型,分析扶壁式挡土墙的变形规律,研究桩的变形及内力特征.研究表明,各排桩的桩身水平位移与内力变化规律相似,土层参数差异对桩身内力变化具有影响作用.各排桩桩身的最大水平位移较为接近,刚性桩的存在有助于限制回填边坡滑动面的发展,桩身的水平位移增量曲线呈“勺”形;第一排桩桩顶轴力最大,第二和第三排桩的最大轴力比第一排桩的分别小14.07%、51.92%;各桩桩身弯矩曲线整体呈“弓”形,最大弯矩在桩顶附近;各排桩桩身剪力曲线变化规律呈“波浪形”,并在土层交界处附近出现“波谷”.Based on the pratical projects,FLAC 3D software was used to establish a numerical analysis model of rigid pile composite foundation under the retaining wall,analyzed the deformation law of the buttress retaining wall and studied,and the deformation and internal force characteristics of piles.It was showed that the horizontal displacement of each row of piles was similar to the internal force change,and the difference of soil parameters had an effect on the change of the internal force of the pile.At the same time the maximum horizontal displacement of each row of piles was relatively close.The existence of rigid piles helps to limit the development of the sliding surface of the backfilled slope.The horizontal displacement increment curve of the piles presented in the shape of a“spoon”.The first row of piles had the largest axial force at the top of the piles,and the maximum axial forces of the second and third rows of piles were 14.07% and 51.92% smaller than those of the first row of piles,respectively.Besides,The bending moment curve of each pile body was in a“bow”shape in general,and the maximum bending moment appeared near the top of the pile.The appeared shear force curve of each row of piles exhibited a change law of“wave-shaped”,and the“wave valleys”appear near the junction of the soil layers.

关 键 词：挡墙荷载 刚性桩复合地基 水平荷载 数值模拟 位移 内力 

分 类 号：TU447[建筑科学—岩土工程]