微型桩顶刚性板连接治理堆积层滑坡模型试验研究  

Model Test Study on Rigid plate Connection of Micro-pile Top to Control Accumulation layer Landslide

作　　者：王元戎 何晖[2] 李德旭 夏琦 康宝祥 何梦迪 周凯 Wang Yuanrong;He Hui;Li Dexu;Xa Qi;Kang Baoxiang;He Mengdi;Zhou Kai(School of Traffic Engineering,Xi'an Automotive Vocational University,Xi'an 710600,China;School of Architecture and Engineering,Xi'an Polytechnic University,Xi'an 710016,China;Xi'an China Railway Rail Transit Co.,Ltd.,Xi'an 710229,China)

机构地区：[1]西安汽车职业大学交通工程学院,西安710600 [2]西安工业大学建筑工程学院,西安710016 [3]西安中铁轨道交通有限公司,西安710229

出　　处：《科技通报》2024年第2期38-44,共7页Bulletin of Science and Technology

基　　金：陕西省教育厅专项科研计划项目(21JK0826)。

摘　　要：为了探究微型桩在刚性板连接下加固堆积层滑坡效果,本文基于室内物理模拟试验,研究微型桩受刚性板连接后及在桩顶不同荷载作用下桩身的受力特征。研究表明:微型桩通过刚性板连接后相较于独立微型桩群,滑坡体同一监测点处水平位移明显减小,在此基础上增加桩顶荷载则位移进一步减小;在刚性板作用下,第1至第3排桩身土压力依次减小,桩身抗力比为1∶0.77∶0.71;桩身弯矩呈现“S”型分布,反弯点存在于滑面附近;相较于独立微型桩,刚性板连接微型桩后及桩顶荷载作用下桩身弯矩最大值变化明显降低。In order to explore the effect of micro-piles under the connection of rigid plates to reinforce the landslide in the accumulation layer,based on the indoor physical simulation test,this paper studies the mechanical characteristics of micro-piles under the connection of rigid plates and different loads on the pile top.The research shows that the hori-zontal displacement at the same monitoring point of the landslide mass is significantly reduced after the micropiles are connected by rigid plates compared with the independent micropiles,and the displacement is further reduced by in-creasing the pile top load on this basis;Under the action of rigid plate,the earth pressure of the first to third row of piles decreases in turn,and the pile resistance ratio is 1∶0.77∶0.71;The bending moment of pile body presents"S"type distribution,and the reverse bending point exists near the sliding surface;Compared with independent micropiles,the change of the maximum bending moment of the pile body under the action of the load on the top of the pile after the rigid plate is connected to the micropiles is significantly reduced.

关 键 词：微型桩 刚性板 堆积层滑坡 土压力 位移 弯矩 

分 类 号：TU473[建筑科学—结构工程]