盾构隧道叠合结构力学特性分析  

Analysis of the Mechanical Characteristics of the Shield Tunnel Composite Structure

作　　者：陈青云 CHEN Qing-yun(China Railway Guangzhou Engineering Group Co.,Ltd.,Guangzhou 510000)

机构地区：[1]中铁广州工程局集团有限公司,广州510000

出　　处：《广州建筑》2025年第2期7-12,共6页GUANGZHOU ARCHITECTURE

基　　金：国家自然科学基金资助项目(52378398),江西省主要学科学术和技术带头人领军人才项目(20232BCJ22009);江西省自然科学基金资助项目(20242BAB26077)。

摘　　要：为了提高盾构隧道的纵向刚度,防止盾构隧道发生不均匀沉降时而出现轨道脱空,本文提出了一种新型的盾构隧道与轨道板叠合结构,其中轨道板采用U型槽形式。通过对新型叠合隧道结构进行数值仿真分析,与圆形盾构隧道进行对比分析。结果表明:新型叠合结构极大地提升了盾构隧道的纵向刚度与横向刚度;通过对新型叠合隧道数值仿真结果进行反演计算分析发现,新型叠合隧道对纵向刚度的提升幅度为182.72%;新型U型槽轨道板与盾构隧道叠合结构在不加大盾构隧道净空的条件下提升盾构隧道的纵、横向刚度,且U型槽轨道板的两侧腹板上部形成两条纵向疏散通道,新型结构值得推广应用。In order to improve the longitudinal stiffness of the shield tunnel and prevent the track from disengaging when the shield tunnel has uneven settlement,a new type of shield tunnel and track slab composite structure is proposed,in which the track slab is in the form of U-shaped groove.Through the numerical simulation analysis of the new superimposed tunnel structure,the numerical simulation analysis is compared with the circular shield tunnel.The results show that the new composite structure greatly improves the longitudinal stiffness and lateral stiffness of the shield tunnel.Through the inversion calculation and analysis of the numerical simulation results of the new superimposed tunnel,it is found that the longitudinal stiffness of the new superimposed tunnel is increased by 182.72%.The composite structure of the new U-shaped groove track slab and the shield tunnel improves the longitudinal and lateral stiffness of the shield tunnel without increasing the clearance of the shield tunnel,and the upper webs on both sides of the U-shaped groove track slab form two longitudinal evacuation channels.The new structure is worthy of popularization and application.

关 键 词：盾构隧道 叠合结构 数值仿真 U型槽轨道板 

分 类 号：U455[建筑科学—桥梁与隧道工程]