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
王元戎 1何晖 2李德旭 1夏琦 1康宝祥 1何梦迪 1周凯3
作者信息
- 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
- 折叠
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.
Abstract
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Key words
micropile/rigid plate/accumulation layer landslide/earth pressure/displacement引用本文复制引用
基金项目
陕西省教育厅专项科研计划项目(21JK0826)
出版年
2024
NETL
NSTL
维普
万方数据