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隧道建设(中英文) ›› 2019, Vol. 39 ›› Issue (5): 851-857.DOI: 10.3973/j.issn.2096-4498.2019.05.017

• 施工技术 • 上一篇    下一篇

高黎贡山隧道破碎地层TBM施工技术与应对方法研究

张兵1, 2, 杨延栋1, 2, 孙振川1, 2, 马亮2   

  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 511458)
  • 收稿日期:2018-11-16 修回日期:2019-04-15 出版日期:2019-05-20 发布日期:2020-03-11
  • 作者简介:张兵(1983—),男,河南信阳人,2007年毕业于北京科技大学,岩土工程专业,硕士,高级工程师,现主要从事盾构及掘进技术研究及管理工作。Email: skl_zb@126.com。
  • 基金资助:

    中国铁路总公司科技研究开发计划(2016G004-A); 国家重点研发计划(2017YFB1302605); 中国中铁科技开发计划(2017-重大-21); 中铁隧道局科技创新计划(隧研合2018-03)

Construction Technology and Countermeasures for TBM Boring in Broken Ground of Gaoligongshan Tunnel

ZHANG Bing1, 2, YANG Yandong1, 2, SUN Zhenchuan1, 2, MA Liang2   

  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)
  • Received:2018-11-16 Revised:2019-04-15 Online:2019-05-20 Published:2020-03-11

摘要:

为解决大瑞铁路高黎贡山隧道出口段岩石破碎地质影响TBM施工的问题,针对掌子面前方破碎围岩,提出掌子面前方化学灌浆加固、小导洞开挖及超前管棚等方法联合帮助TBM脱困,同时提出护盾向前延伸、刮渣口限粒板加密的TBM设备改进应对方法; 针对破碎围岩露出护盾后易塌落问题,提出隧道顶部加强初期支护和化学灌浆、隧道腰部立模灌浆、隧道底部机械化清渣的应对方法。现场实践表明: 采用上述方法,有效降低了TBM在破碎地层掘进刀盘被卡的风险,即使刀盘被卡也能在可控的时间内及时脱困; 同时还有效提高了TBM通过破碎地层的施工速度。

关键词: 高黎贡山隧道, 破碎地层, 全断面岩石隧道掘进机, 刀盘脱困, 化学灌浆, 导洞法, 超前管棚、设备改造

Abstract:

The broken ground at exit section of Gaoligongshan Tunnel on DaliRuili Railway has adverse effect on TBM construction. Hence, a series of mehods for TBM releasing in broken ground, i.e. chemical grouting reinforcement ahead of tunnel face, small guide hole excavation and advance piperoof, are proposed; and TBM equipment improvements such as extending the shield and increasing the limit plate on scraper mouth are proposed as well. And then, for the problem that the surrounding rock is prone to collapse after shield passing, some countermeasures including strengthening the primary support and chemical grouting of tunnel top, installing template and pouring cement slurry at the waist of tunnel, and mechanized slag clearing at the bottom of tunnel, are put forward. The field practice shows that by adopting the abovementioned methods, the risk of TBM being jammed in the broken ground is reduced effectively, and the cutterhead releasing time is reduced, which improves the TBM boring efficiency in broken ground.

Key words: Gaoligongshan Tunnel, broken ground, fullface rock tunnel boring machine, cutterhead releasing, chemical grouting, guiding hole method, advance piperoof, equipment reformation

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