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隧道建设(中英文) ›› 2014, Vol. 34 ›› Issue (12): 1137-1142.DOI: 10.3973/j.issn.1672-741X.2014.12.004

• 研究与探索 • 上一篇    下一篇

宁和城际矿山法隧道下穿国铁隧道影响分析

彭红霞1, 程云妍2, 王怀东2   

  1. (1.南京地铁集团有限公司, 江苏 南京 210008; 2.中铁隧道勘测设计院有限公司, 天津 300133 )
  • 收稿日期:2014-08-11 修回日期:2014-11-13 出版日期:2014-12-20 发布日期:2014-12-17
  • 作者简介:彭红霞(1982—),女,四川南部人,2004年毕业于西南交通大学,土木工程专业,本科,工程师,现从事地铁设计、研究和管理工作。

Analysis on Influence of Construction of Mining Tunnel on NanjingHexian Intercity Railway Crossing Underneath Existing Freight Railway Tunnel

PENG Hongxia1, CHENG Yunyan2, WANG Huaidong2   

  1. (1. Nanjing Metro Group Co., Ltd., Nanjing 210008, Jiangsu, China;2. China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300133, China)
  • Received:2014-08-11 Revised:2014-11-13 Online:2014-12-20 Published:2014-12-17

摘要:

为验证矿山法隧道设计的合理性和下穿货运铁路隧道的安全性,采用数值模拟方法,对宁和城际矿山法区间下穿宁芜货运铁路隧道的影响进行了研究分析。结果表明,区间隧道施工完成后,宁芜货运铁路隧道的最大沉降为6.7 mm,最大水平位移为1.2 mm,引起的最大附加弯矩为32 kN•m,变形值满足货运铁路的运营要求,内力值也在结构的设计范围内。说明定向管棚+超前小导管的地层加固措施是可行的,矿山法隧道下穿铁路的设计是合理的,可为类似工程提供参考。

关键词: 铁路隧道, 地铁区间, 矿山法, 数值分析

Abstract:

The influence of the construction of a mining tunnel on NanjingHexian intercity railway crossing underneath an existing NanjingWuhu freight railway tunnel is analyzed by means of numerical simulation, so as to verify the rationality of the design of the mining tunnel and the safety of the existing freight railway tunnel. The results show that, after the construction of the mining tunnel, the maximum settlement of the existing railway tunnel is 6.7 mm, the maximum horizontal displacement of the existing railway tunnel is 1.2 mm and the maximum additional bending moment induced is 32 kN•m. The deformation values can meet the operation requirements of the existing freight railway and the internal forces are within the design scope of the structures. It is verified that the ground reinforcement measures including “directional piperoof + forepoling” taken are reliable, and the design of the mining tunnel crossing underneath the existing railway tunnel is rational. The paper can provide reference for similar projects in the future.

Key words: existing railway tunnel, Metro tunnel, mining method, numerical analysis

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