桩-坡结构体系土拱形成演化机制研究  

Study on Soil Arching Formation and Evolution Mechanism of Pile-slope Structure System

作　　者：郑志民 华建兵 ZHENG Zhimin;HUA Jianbing(Group Headquarters,China Railway 21st Bureau Group Co.Ltd.,Lanzhou 730070,China;School of Urban Construction and Transportation,Hefei University,Hefei 230601,China)

机构地区：[1]中铁二十一局集团有限公司集团总部,甘肃兰州730070 [2]合肥大学城市建设与交通学院学院,安徽合肥230601

出　　处：《安徽工程大学学报》2024年第3期57-63,85,共8页Journal of Anhui Polytechnic University

基　　金：安徽省重点研究与开发计划项目(1804a0802206)。

摘　　要：为研究堆积体边坡-h型抗滑桩结构体系的土拱形成演化机制,以某典型堆积体边坡为研究对象,采用有限元软件ABAQUS构建堆积体边坡-h型抗滑桩结构体系三维数值计算模型,分析滑坡推力作用下h型抗滑桩桩间土拱的形成过程及演化规律,探究桩径比和土体性质对h型抗滑桩桩间土拱效应的形成及功能发挥的影响。研究结果表明,在滑坡推力作用下,h型抗滑桩产生双层土拱,且双层土拱的形成并不同步。相较于普通抗滑桩的单层土拱,h型抗滑桩在前、后桩处则分别形成土拱,可有效增加h型抗滑桩的支挡效果。同时,桩径比和土体性质对双层土拱的功能发挥影响显著。当桩径比分别在3~6之间时,h型抗滑桩在前、后桩后侧均会形成发育良好的土拱,可充分发挥支挡作用。此外,在一定范围内增大内摩擦角和粘聚力同样有利于双层土拱功能的发挥。In order to study the formation and evolution mechanism of soil arching effect of deposit layer slope with h-type anti-slide pile,the typical deposit layer slope was taken as research object.A three-dimensional numerical calculation model of deposit layer slope with h-type anti-slide pile structure was constructed by using finite element software ABAQUS.The formation process and evolution law of soil arching effect between h-type anti-slide piles under the action of landslide thrust were analyzed.Meanwhile,the influence of pile diameter ratio and soil properties on the formation and function of soil arching effect between piles of h-type anti-slide pile was investigated.The results show that h-type anti-slide pile produces double-layer soil arching effect under the action of landslide thrust,and the formation of double-layer soil arching is not synchronous.Compared with the single-layer soil arching of ordinary anti-slide pile,the soil arching is formed at the front and rear of h-type anti-slide pile,which can effectively increase the retaining effect of h-type anti-slide pile.Moreover,pile diameter ratio and soil properties have significant influence on the function of double-layer soil arching effect.When the pile diameter ratio is between 3 and 6,the soil arching was formed at the front and rear of h-type anti-slide pile,which can give full play to the role of retaining.In addition,increasing the internal friction angle and cohesive force is also conducive to the play of the double-layer soil arching effect.

关 键 词：堆积体边坡 h型抗滑桩 土拱效应 桩径比 土体性质 

分 类 号：TU473.1[建筑科学—结构工程]