浅埋偏压软弱围岩隧道施工技术

刘军

doi:10.3973/j.issn.1672-741X.2012.z1.022

隧道建设 >

2012 , Vol. 32 >Issue 增刊1: 102 - 104

DOI: https://doi.org/10.3973/j.issn.1672-741X.2012.z1.022

施工技术

浅埋偏压软弱围岩隧道施工技术

刘军

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（中铁一局集团第五工程有限公司，陕西宝鸡 721006）

刘军（1976—），男，陕西西乡人， 2000年毕业于兰州铁道学院铁道工程专业，本科，工程师，现从事铁路建设施工和技术管理工作。

收稿日期: 2012-09-28

修回日期: 2012-10-15

网络出版日期: 2013-02-19

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Construction Technologies for Asymmetricalloaded and Shallowburied  Tunnels with Soft Surrounding Rocks

LIU Jun

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(The Fifth Engineering Co., Ltd. of China Railway First Group, Baoji 721006, Shaanxi, China)

Received date: 2012-09-28

Revised date: 2012-10-15

Online published: 2013-02-19

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摘要

浅埋偏压软弱围岩隧道若围岩为全风化岩，土体较为松散，围岩自稳能力较差，隧道开挖后容易出现塌方、冒顶等灾害，施工中隧道预留沉降量极难把控，即使开挖完成后也容易出现初期支护变形量较大，导致二次衬砌断面不足。京福铁路闽赣五标段金岭头隧道和童游隧道洞口段地质条件为全风化云母石英片岩，呈砂土状，地下水为孔隙裂隙水，施工中合理选用六部CD法、三台阶临时仰拱法和加强临时支护、反压回填等措施，控制了围岩和初期支护变形，保证了盾构能安全地通过风险地段。

关键词： 浅埋偏压; 软弱围岩; 隧道

本文引用格式

刘军 . 浅埋偏压软弱围岩隧道施工技术[J]. 隧道建设, 2012 , 32(增刊1) : 102 -104 . DOI: 10.3973/j.issn.1672-741X.2012.z1.022

Abstract

If the surrounding rocks of asymmetricalloaded and shallowburied tunnel are weathered, collapse often occurs. It is difficult to reserve deformation. The deformation of primary support is large. The 6step CD method, 3step primary invert method, temporary support strengthening method and backfilling method are adopted in the construction of the entrances of Jinlingtou tunnel and Tongyou tunnel on BeijingFuzhou railway. The deformations of surrounding rocks and primary supports are brought under effective control and the safety of the shield passing throught dangerous section is guaranteed. 

Key words： asymmetrical load; shallow bury; soft and weak surrounding rock; tunnel

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