摘要
在计算巷道衬砌结构时,传统方法是将巷道拱圈和两帮直墙分开进行独立分析,即认为拱圈是通过拱脚与直墙弹性固结的无铰拱。然而由于巷道围岩的力学性质不同,围岩对拱脚位移的约束能力也存在较大差异,且由于初期支护所采用的衬砌截面较薄,对拱脚的约束能力也进一步下降,因此文章将此类巷道拱圈简化为两铰拱,拱脚假定为活动铰,利用结构力学方法分析拱圈的力学性质,旨在为巷道应力计算及初期支护提供参考依据。
In the calculation of tunnel lining structure,the traditional method is to separate the tunnel arch and the straight walls on both sides for independent analysis,that is,the arch is considered to be a hingeless arch that is elastically consolidated by the arch foot and the straight wall.However,due to the different mechanical properties of the surrounding rocks in the tunnel,the constraint capacity of the surrounding rock on the displacement of the arch foot is also quite different,and because the lining section used in the initial support is thin,the constraint capacity on the arch foot is further reduced.Therefore,this paper simplifies the arch of this kind of tunnel as a two-hinged arch,and the arch foot is assumed to be an movable hinge.The mechanical properties of the arch are analyzed by structural mechanics method,which aims to provide reference for tunnel stress calculation and initial support.
作者
何哲涛
彭岩岩
王艳丽
黄倩
王立壮
樊啸
HE Zhetao;PENG Yanyan;WANG Yanli;HUANG Qian;WANG Lizhuang;FAN Xiao(School of Civil Engineering,Shaoxing University,Shaoxing 312000,Zhejiang,China;Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province,Shaoxing 312000,Zhejiang,China;Huahui Engineering Design Group Co.,Ltd.,Shaoxing 312000,Zhejiang,China)
出处
《工程技术研究》
2024年第4期33-36,共4页
Engineering and Technological Research
关键词
巷道
衬砌结构
活动铰
拱脚
tunnel
lining structure
movable hinge
arch foot
