Key Technology for Design and Construction of Highway Tunnel Crossing  underneath Operating Railway Lines with Small Clearance

GOU Mingzhong

doi:10.3973/j.issn. 1672-741X.2013.01.010

2013 , Vol. 33 >Issue 1: 59 - 64

DOI: https://doi.org/10.3973/j.issn. 1672-741X.2013.01.010

Key Technology for Design and Construction of Highway Tunnel Crossing  underneath Operating Railway Lines with Small Clearance

GOU Mingzhong

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(China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, Sichuan, China)

Received date: 2012-08-22

Revised date: 2012-11-25

Online published: 2013-02-06

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Abstract

A highway tunnel in Xiameng crosses underneath operating YingtanXiamen railway line and turnout section with small clearance. Countermeasures, such as threelayer lining structure (primary reinforcement, first insitucast concrete lining and secondary insitucast concrete lining), 299 superlong pipe curtain installed in circular form, preconsolidation of ground by deephole grouting on the tunnel face and around the tunnel contour, 6step tunnel excavation by double side drift method, are taken. In the end, the tunnel crosses the railway successfully. 

Key words： highway tunnel under supershallow cover; tunneling underneath existing railway line; railway protection; superlong pipe curtain; threelayer lining; double side drift method; sixstep excavation

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GOU Mingzhong . Key Technology for Design and Construction of Highway Tunnel Crossing  underneath Operating Railway Lines with Small Clearance[J]. Tunnel Construction, 2013 , 33(1) : 59 -64 . DOI: 10.3973/j.issn. 1672-741X.2013.01.010

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