轨道交通隧道复合型材加固设计方法研究

Research on reinforcement design method of composite profiles for rail transit tunnels

摘要

随着轨道交通隧道运营时间的增加和周围土体的变化，隧道病害问题日益突出，验证影响隧道结构及轨道交通的运营安全。旨在研究轨道交通隧道复合型材加固设计方法，明确分析其在隧道工程中的应用效果和优势。通过文献综述和案例分析，评估目前隧道工程加固设计方法存在的问题和局限性，提出一种基于复合型材加固的设计方法。研究结果显示，复合型材加固设计方法在提高隧道结构稳定性和耐久性等方面具有显著优势，建立盾构隧道病害量化分级机制，根据TDCI分值将隧道病害程度划分为5个等级，并基于病害分级设计装配式复合型材加固方案和预加固方案，依据病害等级选用不同的加固方式。通过隧道结构断面扫描数据预制装配式复合型材各组合构件，现场实施拼装，再利用锚栓、结构胶与隧道衬砌进行黏结锚固，并灌注灌浆料，从而实现隧道加固。为盾构隧道结构加固提供技术支撑。

Abstract

With the increasing service life of rail transit tunnels and the continuous changes in the surrounding soil, structural defects in tunnels have become increasingly prominent, posing significant risks to tunnel integrity and the operational safety of rail systems. This study focuses on the reinforcement design method utilizing prefabricated composite profiles for rail transit tunnels, aiming to clarify their application performance and advantages in tunnel engineering. Through literature review and case studies, existing problems and limitations in current tunnel reinforcement design method ologies are critically evaluated. A novel reinforcement design approach based on composite profiles is proposed. The findings indicate that this method offers notable advantages in enhancing the structural stability and durability of tunnels. Furthermore, a quantitative classification mechanism for shield tunnel defects is established. Based on the tunnel defect composite index(TDCI), tunnel defects are categorized into five levels. Corresponding reinforcement schemes, including prefabricated composite profile reinforcement and pre-reinforcement strategies, are developed according to defect severity. Using tunnel section scanning data, prefabricated components of the composite profiles are manufactured and assembled on-site. These components are anchored and bonded to the tunnel lining through bolts and structural adhesive, followed by grout injection, to achieve effective reinforcement. This study provides robust technical support for the structural reinforcement of shield tunnels.

关键词

隧道病害等级 / 装配式复合型材 / 隧道加固设计 / TDCI分值 / 加固方案

Key words

tunnel defect classification / prefabricated composite profiles / tunnel reinforcement design / TDCI score / reinforcement scheme

Author summay

夏梦然(1989—), 女, 高级工程师, 学士, 主要从事地下结构研究。E-mail: [e-mail]

基金资助

中国国家铁路集团有限公司科技研究开发计划重点课题(N2023G045)