摘要
为研究基坑内支撑支护结构的力学特性,首先回顾了目前土压力与基坑侧壁水平变形之间关系的研究现状,然后在水平位移-土压力模型的基础上,推导了水平支撑受力、变形、基坑侧壁水平变形之间的数学关系式。同时,结合一工程算例,分析了支撑受力、支撑的位移和基槽支护形式的最初状态以及土体和支护结构之间的相互作用、土压力作用点等诸多因素变化时的相应变化规律。结果表明:其与基坑的初始位移基本无关,不过随着基坑总的水平位移增加、支撑作用点位置的增加、支护结构和土体之间的摩擦角的增大等,均表现出逐渐减小的趋势;同时,其与土压力作用点高度之间呈现出正比关系。
For the purpose of studying mechanics characteristic of internal support structure,the current research situation of the relation of earth pressure and the displacement for the deep foundation is reviewed.At the same time,the formulas between horizontal support force,deformation and horizontal deformation of the side wall of the foundation pit are presented based on displacement-earth pressure model.At the same time,combined with an engineering example,the initial state of the support force,the displacement of the support and the foundation trough support form,as well as the corresponding changes in the interaction between the soil and the support structure,the action point of soil pressure and other factors are analyzed.The outcomes show that it is little relation with initial displacement but it will reduce with the increase of displacement,high supporting location and friction angle of soil and retaining structure.It will also raise with the height of earth pressure point.
作者
陈昌甫
Chen Changfu(BGI Engineering Consultants Ltd.,Beijing 100038,China)
出处
《山西建筑》
2022年第1期9-12,共4页
Shanxi Architecture
关键词
基坑
内支撑
土压力
水平变形
deep foundation
internal support
earth pressure
horizontial displacement
