兰渝铁路杨家坝隧道穿越浅埋泥石流沟施工技术

吴广明; 崔小鹏

doi:10.3973/j.issn.1672-741X.2013.11.011

隧道建设 >

2013 , Vol. 33 >Issue 11: 956 - 959

DOI: https://doi.org/10.3973/j.issn.1672-741X.2013.11.011

施工技术

兰渝铁路杨家坝隧道穿越浅埋泥石流沟施工技术

吴广明 ,
崔小鹏

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（中交第二公路工程局兰渝铁路工程项目经理部，甘肃武都 746000）

吴广明（1959—），男，河南长葛人，1983年毕业于石家庄铁道大学隧道工程专业，本科，高级工程师，从事隧道工程施工技术管理工作。

收稿日期: 2013-03-22

修回日期: 2013-06-25

网络出版日期: 2013-11-15

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Construction Technology for Doubletrack Railway Tunnel  Passing underneath Debris Flow Gully with Shallow Cover:  Case Study on Yangjiaba Tunnel on LanzhouChongqing Railway

WU Guangming ,
CUI Xiaopeng

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(LanzhouChongqing Railway Project Management Department,  CCCC Second Highway Engineering Co., Ltd., Wudu 746000, Gansu, China)

Received date: 2013-03-22

Revised date: 2013-06-25

Online published: 2013-11-15

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摘要

杨家坝隧道在DK376+238~+306段以浅埋方式穿越了燕里沟泥石流沟，为了避免隧道暗挖出现拱部坍塌冒顶、突泥突水等安全事故，克服明挖深基坑施工安全风险，采用拱顶明挖、下部暗作、基底加固的方法施工，成功地解决了采用暗挖和明挖施工方法可能出现的各种安全风险，解决了基底承载力不足的难题，为隧道穿越浅埋泥石流沟做了成功的尝试，探索了软弱围岩浅埋隧道新的施工方法。

关键词： 杨家坝隧道; 双线铁路隧道; 浅埋泥石流沟; 拱顶明挖; 下部暗作; 基底加固

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吴广明 , 崔小鹏 . 兰渝铁路杨家坝隧道穿越浅埋泥石流沟施工技术[J]. 隧道建设, 2013 , 33(11) : 956 -959 . DOI: 10.3973/j.issn.1672-741X.2013.11.011

Abstract

DK376+238~+306 section of Yangjiaba tunnel on LanzhouChongqing railway passes underneath Yanligou debris flow gully under a shallow cover. If the tunnel section mentioned is constructed by mining method, incidents, such as crown collapse, mud burst and water burst, may occur. If the tunnel section mentioned is constructed by cut and cover method, incidents related to deep foundation pit may occur. A new tunnel construction method, which consists of open cut for the arch part, undercutting for the lower part and consolidation for the floor, is adopted so as to avoid the abovementioned incidents. In the end, the tunnel section is built successfully. The paper can provide reference for similar projects in the future.

Key words： Yangjiaba doubletrack railway tunnel; shallow cover; debris flow gully; open cut for arch; undercutting for lower part; floor consolidation

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