• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2016, Vol. 36 ›› Issue (6): 756-761.DOI: 10.3973/j.issn.1672-741X.2016.06.016

• 施工技术 • 上一篇    下一篇

大断面铁路隧道塌方处理过程中初期支护结构安全评估

高洪涛   

  1. (沪昆铁路客运专线湖南有限责任公司, 湖南 长沙 410008)
  • 收稿日期:2016-04-19 修回日期:2016-05-23 出版日期:2016-06-20 发布日期:2016-06-29
  • 作者简介:高洪涛(1974—),男,陕西西安人,2007年毕业于西安科技大学,土木工程专业,本科,高级工程师,现从事铁路土木工程技术管理工作。Email: sxghth10@126.com。

Safety Evaluation of Primary Support Structure during Collapse Treating  of Large Crosssection Railway Tunnel

GAO Hongtao   

  1. (Hunan Co., Ltd. of ShanghaiKunming Passengerdedicated Railway, Changsha 410008, Hunan, China)
  • Received:2016-04-19 Revised:2016-05-23 Online:2016-06-20 Published:2016-06-29

摘要:

为评估隧道塌方处理过程中初期支护结构的安全稳定性,首先对某大断面铁路隧道Ⅳ级围岩塌方处理方案进行描述,通过涌入隧道内的塌方量预估隧道上方坍塌空腔高度,并初步探测出塌体位于隧道上方的高度,加上混凝土填充高度,同时考虑一定的安全系数,计算松散体岩土柱作用于隧道初期支护结构上的垂直荷载强度;然后采用荷载-结构模型,运用ANSYS软件对处理后的初期支护结构进行承载内力模拟,同时结合《铁路隧道设计规范》对其进行安全性评估,为施工方案的确定提供理论依据和决策支持;最后在安全评估的基础上,选择合理的初期支护结构,确保后续隧道施工安全及结构稳定,同时给出塌方段施工安全措施。

关键词: 大断面铁路隧道, 塌方处理, 注浆, 数值模拟, CRD工法

Abstract:

The treating scheme of collapse of surrounding rock of Grade Ⅳ of a large crosssection railway tunnel is described. The distance between collapse cavity and the tunnel is predicted and detected according to collapse volume; and the vertical stress on the primary support structure of the tunnel induced by rock and soil is calculated. The bearing internal force of the primary support structure of the tunnel is simulated by means of ANSYS software and loadstructure model; and the safety evaluation of the primary support structure of the tunnel is made according to Code for Design of Railway Tunnel. Finally, rational primary support structure is adopted and safe construction technologies for collapse section are provided.

Key words: large crosssection railway tunnel, collapse treatment, grouting, numerical simulation, CRD method

中图分类号: