设计、施工、监测

无中导连拱隧道受力机理及对策研究

  • 李志厚 ,
  • 王安民 ,
  • 陈树汪 ,
  • 陈俊武 ,
  • 邓志云
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  • 1.云南省交通投资建设集团有限公司,昆明 650032;
    2.云南省交通规划设计研究院股份有限公司,昆明 650011;
    3.北京交通大学 土木建筑工程学院,北京 100044
李志厚(1966—),男,云南丽江人,博士,主要从事隧道设计及科研、管理相关工作。E-mail:1048603313@qq.com
陈俊武(1990—),男,湖南新化人,高级工程师,博士生,主要从事山岭隧道设计与科研工作。E-mail:1084303810@qq.com

收稿日期: 2024-03-18

  网络出版日期: 2025-01-03

基金资助

云南省交通运输厅科技创新及示范项目(云交科教便〔2022〕25号);云南省科技和人才平台计划(2017HC025);云南交投科技创新计划项目(YCIC-YF-2022-08)

Study on Stress Mechanism and Countermeasure of Multi-Arch Tunnel without Middle Drift

  • Li Zhihou ,
  • Wang Anmin ,
  • Chen Shuwang ,
  • Chen Junwu ,
  • Deng Zhiyun
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  • 1. Yunnan Communications Investment & Construction Group Co., Ltd., Kunming 650032, P. R. China;
    2. Yunnan Institute of Transportation Planning and Design, Kunming 650011, P. R. China;
    3. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P. R. China

Received date: 2024-03-18

  Online published: 2025-01-03

摘要

无中导连拱隧道是连拱隧道最新的发展型式,能显著提升施工效率并降低工程成本,但也存在近接施工、受力体系多次转换和施工控制难度大等缺点。因此,通过模型试验研究了无中导连拱隧道衬砌结构受力机理及破坏特征,结合典型隧道病害特征和65座隧道的建设经验,提出了无中导连拱隧道安全建设对策。模型实验结果表明,先行洞右拱腰的弯矩和轴力值均为最大,为受力最不利部位。先行洞右侧拱腰等部位需要加强结构设计和施工质量控制,并提出“重地质、强先行、预加固、稳中墙、先支撑、短开挖、弱爆破、勤量测、紧二衬、注精细”30字方针的对策措施。本文的对策措施对无中导连拱隧道的设计和安全施工具有参考意义。

本文引用格式

李志厚 , 王安民 , 陈树汪 , 陈俊武 , 邓志云 . 无中导连拱隧道受力机理及对策研究[J]. 地下空间与工程学报, 2024 , 20(6) : 1969 -1978 . DOI: 10.20174/j.JUSE.2024.06.23

Abstract

The multi-arch tunnel without middle drift is the latest development type of the multi-arch tunnel, which can significantly improve the construction efficiency and reduce the project cost. However, there are some disadvantages such as close construction, multiple transformation of the stress system and difficult construction control. Therefore, the mechanical mechanism and failure characteristics of the lining structure of the multi-arch tunnel without middle drift are studied through model tests, combined with typical tunnel disease characteristics and the construction experiences of 65 tunnels, the safety construction countermeasures of the unguided arch tunnel are put forward. The model experiment results show that: The bending moment and axial force values of the right arch waist of the advance hole are both largest and the most unfavorable parts. Therefore, the structural design and construction quality control of the right arch waist and other parts of the advance hole need to be strengthened, and countermeasures of the thirty words principle of "pay attention to geology, strong advance, pre-reinforcement, stable middle wall, first support, short excavation, weak blasting, frequent measurement, tight secondary lining and detail injection" are proposed. The countermeasures in this paper have guiding significance for the design and safe construction of multi-arch tunnel without middle drift.

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