大瑞铁路老红坡隧道穿越接触带单侧涌泥处理技术

杨华; 许继琪; 闫优

doi:10.3973/j.issn.2096-4498.2020.S2.031

隧道建设 >

2020 , Vol. 40 >Issue S2: 241 - 248

DOI: https://doi.org/10.3973/j.issn.2096-4498.2020.S2.031

施工技术

大瑞铁路老红坡隧道穿越接触带单侧涌泥处理技术

杨华 ,
许继琪 ,
闫优

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（中铁十二局集团第一工程有限公司，陕西西安 710000）

杨华（1982—），男，陕西西安人，2006年毕业于西安理工大学，隧道工程专业，本科，高级工程师，现从事隧道工程施工与研究工作。E-mail： 88454931@qq.com。

网络出版日期: 2021-03-22

基金资助

中国国家铁路集团有限公司重大课题（P2018G048）

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Treatment Technology for Mud Gushing from One Side of Laohongpo Tunnel Crossing Contact Zone of DaliRuili Railway

YANG Hua ,
XU Jiqi ,
YAN You

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(The 1st Engineering Co., Ltd. of China Railway 12th Bureau Group, Xi′an 710000, Shannxi, China)

Online published: 2021-03-22

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摘要

大瑞铁路老红坡隧道穿越可溶岩与非可溶岩接触带施工单侧发生涌泥大变形地质灾害。通过分析变形开裂及地质成因，正洞内采用迂回导坑方案探明涌泥体范围，采用洞内扩挖工作洞室，在隧道单侧轮廓外施作超前水平注浆+高压水平旋喷桩加固及超前水平长大管棚的方案进行处理，并对该段支护及衬砌结构调整加强。依据现场工况，采用三台阶法分部、分段拆换作业，在钢架拱脚增设临时仰拱或临时横撑控制收敛变形，及时施作格栅钢架模筑衬砌，变形稳定后再施作永久二次衬砌。该技术在大瑞铁路老红坡隧道单侧突泥涌水地质灾害处治施工实践中得到了成功应用，取得了良好效果。

关键词： 铁路隧道; 接触带涌泥大变形; 迂回导坑; 水平旋喷桩; 超前水平长大管棚

本文引用格式

杨华 , 许继琪 , 闫优 . 大瑞铁路老红坡隧道穿越接触带单侧涌泥处理技术[J]. 隧道建设, 2020 , 40(S2) : 241 -248 . DOI: 10.3973/j.issn.2096-4498.2020.S2.031

Abstract

The mud gushing and large deformation occurred to Laohongpo tunnel of DaliRuili railway when crossing contact zone between soluble rock and nonsoluble rock. According, the deformation, cracking and geological causes are analyzed, the mud gushing scope in main tunnel is explored by using bypass heading, the working chamber in tunnel is enlarged, treatment method of advanced horizontal grouting + highpressure horizontal jet grouting pile and advanced horizontal large pipe roof is adopted, and the support and lining structure are adjusted and strengthened. According to the site working conditions, the threebench method is adopted to separate and replace the steel frame in sections. The temporary invert or temporary cross brace is added at the arch foot of the steel frame to control the convergence deformation. The grid steel frame formwork lining is constructed in time, and the permanent secondary lining is constructed after the deformation becomes stable. The technology mentioned has been successfully applied to the construction practice in Laohongpo tunnel of DaliRuili railway, and good results have been achieved.

Key words： ; railway tunnel; large deformation of contact zone with mud gushing; bypass heading; horizontal jet grouting pile; advanced horizontal long pipe roof

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