巷道拱脚为活动铰支护计算与结构分析
Calculation and Structural Analysis of Tunnel Arch Foot as Movable Hinge Support
何哲涛 1彭岩岩 2王艳丽 3黄倩 4王立壮 1樊啸1
作者信息
- 1. 绍兴文理学院 土木工程学院,浙江 绍兴 312000
- 2. 绍兴文理学院 土木工程学院,浙江 绍兴 312000;浙江省岩石力学与地质灾害重点实验室,浙江 绍兴 312000;华汇工程设计集团股份有限公司,浙江 绍兴 312000
- 3. 华汇工程设计集团股份有限公司,浙江 绍兴 312000
- 4. 绍兴文理学院 土木工程学院,浙江 绍兴 312000;浙江省岩石力学与地质灾害重点实验室,浙江 绍兴 312000
- 折叠
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.
Abstract
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.
关键词
巷道/衬砌结构/活动铰/拱脚Key words
tunnel/lining structure/movable hinge/arch foot引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据