ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2014, Vol. 34 ›› Issue (12): 1137-1142.DOI: 10.3973/j.issn.1672-741X.2014.12.004
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PENG Hongxia1, CHENG Yunyan2, WANG Huaidong2
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Abstract:
The influence of the construction of a mining tunnel on NanjingHexian intercity railway crossing underneath an existing NanjingWuhu 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 piperoof + 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
CLC Number:
U 45
PENG Hongxia, CHENG Yunyan, WANG Huaidong. Analysis on Influence of Construction of Mining Tunnel on NanjingHexian Intercity Railway Crossing Underneath Existing Freight Railway Tunnel[J]. Tunnel Construction, 2014, 34(12): 1137-1142.
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http://www.suidaojs.com/EN/Y2014/V34/I12/1137
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