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隧道建设(中英文) ›› 2021, Vol. 41 ›› Issue (2): 165-174.DOI: 10.3973/j.issn.2096-4498.2021.02.002

• 专家论坛 • 上一篇    下一篇

Challenges in Tunnel Construction and Preliminary Study on Innovative TBM Design for SichuanTibet Railway(川藏铁路TBM隧道建设挑战及装备创新设计探讨)

陈馈1, 2, 冯欢欢1, 2, *, 贺飞3
  

  1. 1. 盾构及掘进技术国家重点实验室, 河南 郑州 450001 2. 中铁隧道局集团有限公司, 广东 广州 5114583. 中铁工程装备集团有限公司, 河南 郑州 450016
  • 出版日期:2021-02-20 发布日期:2021-03-05
  • 作者简介:陈馈(1963—),男,湖南新化人,1985年毕业于长沙铁道学院,工程机械专业,博士,教授级高级工程师,现从事盾构技术研究与管理工作。E-mail: 18637979101@163.com。*通信作者: 冯欢欢, E-mail: skl_fhh@163.com。
  • 基金资助:
    国家重点基础研究发展计划(973计划)项目(2014CB046906); 中国铁路总公司科技研究开发计划(2016G004-A

Challenges in Tunnel Construction and Preliminary Study on Innovative TBM Design for SichuanTibet Railway

CHEN Kui1,2, FENG Huanhuan1, 2, HE Fei3   

  1. (1. State Key Laboratory of Shield Machine and Boring Technology, Zhengzhou 450001, Henan, China; 2. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China; 3. China Railway Engineering Equipment Group Co., Ltd., Zhengzhou 450016, Henan, China)
  • Online:2021-02-20 Published:2021-03-05

摘要: 川藏铁路具有显著的地形高差、强烈的板块活动、频发的山地灾害、脆弱的生态环境、严重的高寒缺氧等特征,是目前国内外最具有挑战性的铁路工程。为充分应对川藏铁路隧道建设过程中将面临的长大隧道多、地应力高、活动断层频繁等重大挑战,详细阐述各类复杂工况下采用TBM施工所面临的相应挑战。系统分析川藏铁路TBM创新设计理念及特点,从高原高寒、长距离硬岩掘进、岩爆、断层破碎带、大变形、突泥涌水、高岩温等方面进行TBM针对性创新设计分析,并提出: 1)超前地质探测和处理是用于川藏铁路隧道TBM施工风险控制的主要手段; 2)对于以岩爆为主的隧道,创新设计“双护盾+锚喷支护”的双护盾TBM或双支护TBM显得尤为重要; 3)对于以大变形为主的隧道,宜首选双结构的敞开式TBM或进行其他结构方面的创新设计。

关键词: 川藏铁路, 特长隧道, TBM, 高原高寒, 高地应力, 高地温, 不良地质条件

Abstract: SichuanTibet Railway is the most challenging railway project worldwide to date due to its great elevation difference, intensive tectonic activities, frequent mountain disasters, fragile ecological environment and severe hypoxia at high altitude. In this paper, the challenges to be encountered during TBM construction for SichuanTibet Railway under various complex conditions, including numerous long and large tunnels, high insitu stresses, and highly active faults etc., are described in details. Innovative design concepts and characteristics of TBMs for construction of SichuanTibet Railway are systematically analyzed in eight aspects such as alpinecold condition, longdistance driving in hard rock and rockburst etc. From these analysis, conclusions are drawn as follows: (1) Advanced geological probing and treatment is a main means of risk control for TBM tunneling during construction of SichuanTibet Railway tunnels. (2) It is particularly necessary to adopt innovative design TBM with "dual shield + rock bolt & shotcrete" or dualsupport TBM for constructing rockburst prone tunnels. (3) For tunnels prone to large deformation, open dualmode TBMs or TBMs with innovative structure design are preferred. It is expected to provide some reference for targeted TBM design and tunnel construction in the later stage.

Key words: SichuanTibet Railway, extralong tunnel, TBM, alpinecold condition; high insitu stress, high ground temperature, adverse geological conditions

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