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隧道建设(中英文) ›› 2018, Vol. 38 ›› Issue (2): 287-294.DOI: 10.3973/j.issn.2096-4498.2018.02.018

• 施工技术 • 上一篇    下一篇

台阶法(带仰拱)一次开挖施工技术在软岩隧道中的应用

刘招伟1, 2, 李建华1   

  1. (1. 中铁隧道局集团有限公司, 广东 广州 511458; 2. 中铁电气化局集团公司, 北京 100036)
  • 收稿日期:2017-07-27 修回日期:2018-01-12 出版日期:2018-02-20 发布日期:2018-03-19
  • 作者简介:刘招伟(1962—),男,江西吉安人,2003年毕业于中国地质大学,隧道及地下工程专业,博士,教授级高级工程师,现从事隧道及地下工程技术管理工作。Email: 279272419@qq.com。
  • 基金资助:

    铁路软岩隧道台阶法(含仰拱)一次开挖综合施工技术研究(隧研合2015-01); 蒙华重载铁路隧道技术创新与应用(2016-专项-03)

Application of Onetime Excavation Method of Bench and Inverted Arch to Soft Rock Tunnel

LIU Zhaowei1, 2, LI Jianhua1   

  1. (1. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China; 2. China CREC Railway Electrification Bureau Group, Beijing 100036, China)
  • Received:2017-07-27 Revised:2018-01-12 Online:2018-02-20 Published:2018-03-19

摘要:

软岩隧道采用传统台阶法开挖时易出现初期支护封闭不及时、步距超标等问题,为解决上述问题,依托蒙华重载铁路部分隧道,提出台阶法(带仰拱)一次开挖施工技术,阐述三台阶(带仰拱)和二台阶(带仰拱)施工工艺流程,从结构力学与变形响应、施工便捷性与设备空间布置等方面综合分析,提出台阶高度和台阶长度的合理设置原则,结合段家坪隧道与中条山隧道现场施工情况,分析台阶法(带仰拱)一次开挖工法的工序组织、技术要点与应用效果,总结台阶法(带仰拱)一次开挖工法的施工技术特点,并提出该工法的推广应用前景。

关键词: 软岩隧道, 台阶法, 一次开挖, 仰拱, 台阶高度, 台阶长度

Abstract:

The untimely primary support closure and overlarge of advancing distance are often encountered during soft rock tunnel excavation by bench method. As a result, onetime bench excavation method (with inverted arch) is proposed for some tunnels on Menghua heavy haul railway; the construction flowcharts of threebench method (with inverted arch) and twobench method (with inverted arch) are introduced; the construction parameters such as bench height and bench length are put forward by comprehensively analyzing the structural mechanism, deformation response, construction convenience and arrangement of equipments; the construction organization, technical key points and applicable effect of the onetime excavation method of bench and inverted arch in Duanjiaping Tunnel and Zhongtiaoshan Tunnel are presented. Finally, the construction characteristics of the abovementioned technology are summarized, and the technology is prospectively popularized.

Key words: soft rock tunnel, bench method, onetime excavation, inverted arch, bench height, bench length

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