城市建筑2025，Vol.22Issue(20)：199-201,217,4.DOI:10.19892/j.cnki.csjz.2025.20.50
下穿既有隧道管棚预支护结构受力变形及预支护效果研究
Study on the Stress Deformation and Pre-Support Effect of the Pre-Support Structure of the Existing Underpass Tunnel Pipe Arch
摘要
Abstract
As an important means of pre-supporting,the pipe arch is often used in the construction of tunnels underpassing the existing railway lines.The precise prediction of the stress-induced deformation its pre-support effectiveness is crucial for guaranteeing the rational structural design of the pipe arch.However,the current theoretical research on pipe arch pre-support technology is insufficient and cannot provide sufficiently precise quantitative guidance to support the design and construction of pipe arch.To more accurately describe the stress deformation and pre-support effectiveness of pipe arch pre-support structures in shallow-buried soft rock tunnels,based on the existing research findings,the paper employs theoretical derivation methods to conduct an in-depth analysis on pipe arches.Based on Pasternak's elastic foundation beam theory,an analytical model tailored for pipe arch structures was established.This model thoroughly investigates the support efficiency and mechanical behavior of pipe arch pre-support technology,and analyzes how various design and construction parameters influence the mechanical response of pipe arches in detail.It is anticipated that the findings of this paper will provide valuable guidance and new insights for the design and construction practices of pipe arches.关键词
隧道工程/下穿既有线/弹性地基梁/管棚/支护变形Key words
tunnelling works/underpass the existing line/elastic foundation beams/pipe sheds/deformed support分类
建筑与水利引用本文复制引用
刘凤翔..下穿既有隧道管棚预支护结构受力变形及预支护效果研究[J].城市建筑,2025,22(20):199-201,217,4.
