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研究与探索

基于岩土控制变形工法的公路隧道施工变形分析——以野猪山隧道为例

  • 谈识 ,
  • 丁文其 ,
  • 刘诚 ,
  • 刘挺 ,
  • 郭洪雨
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  • (1. 同济大学土木工程学院地下建筑与工程系, 上海 200092; 2. 同济大学岩土及地下工程教育部重点实验室, 上海 200092; 3. 宁波市高等级公路建设指挥部, 浙江宁波 315192; 4. 浙江省交通规划设计研究院, 浙江杭州 310006)
谈识(1991—), 男, 江苏扬州人,同济大学隧道与地下建筑工程专业在读博士,主要从事隧道及地下工程设计和施工技术等方面的研究工作。Email: 1170893859@qq.com。

收稿日期: 2016-09-14

  修回日期: 2017-02-22

  网络出版日期: 2017-06-08

基金资助

基于软弱围岩变形控制工法的公路隧道安全施工关键技术研究项目(201611); 国家自然科学基金项目(51578408); 复杂环境下浅埋大断面互通隧道关键技术研究项目(20133139)

Analysis of Deformation of Yezhushan Highway Tunnel Construction Based on Analysis of Controlled Deformation in Rocks and Soils (ADECORS)

  • TAN Shi ,
  • DING Wenqi ,
  • LIU Cheng ,
  • LIU Ting ,
  • GUO Hongyu
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  • (1. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering (Tongji University), Ministry of Education, Shanghai 200092, China; 3. Ningbo Highway Construction Bureau, Ningbo 315192, Zhejiang, China; 4. Zhejiang Provincial Institute of Communications Planning Design & Research, Hangzhou 310006, Zhejiang, China)

Received date: 2016-09-14

  Revised date: 2017-02-22

  Online published: 2017-06-08

摘要

宁波野猪山公路隧道右线出口段埋深浅、围岩差,采用岩土控制变形工法施工。该工法在我国公路隧道施工中几乎未有使用。本文通过数值模拟和现场监测数据对比分析,得出: 1)隧道地表沉降的开挖空间效应约为0.6倍跨径,并据敏感程度划分为沉降敏感区、敏感过渡区、稳定区3个区域; 2)隧道拱顶沉降约60%发生在掌子面到达监测断面前,开挖空间效应稍大于单倍跨径; 3)隧道掌子面挤出变形呈外凸抛物面形态,建议施工中纤维锚杆的搭接长度设为6 m,并据挤出变形发展速率划分为快速发展、稳定发展、基本稳定3个阶段。

本文引用格式

谈识 , 丁文其 , 刘诚 , 刘挺 , 郭洪雨 . 基于岩土控制变形工法的公路隧道施工变形分析——以野猪山隧道为例[J]. 隧道建设, 2017 , 37(5) : 593 -599 . DOI: 10.3973/j.issn.1672-741X.2017.05.011

Abstract

ADECORS (analysis of controlled deformation in rocks and soils) method is used in Ningbo Yezhushan Highway Tunnel with shallow buried depth and weak surrounding rock. The abovementioned method is hardly used in highway tunnel construction in China. Based on the analysis of numerical simulation and field monitoring, some results are obtained as follows: 1) As for surface subsidence of Yezhushan Tunnel, the spatial effect of excavation is 0.6 times the span and the settlement area can be divided into 3 parts, namely, sensitive area, sensitive transition area, and stable area. 2) The spatial effect of excavation on tunnel crown top settlement is almost a span and 60% of crown top settlement occurs before tunnel face reaches monitoring section. 3) Threedimensional morphology of Yezhushan Tunnel face extrusion is outer convex parabolic; lap length of fiberglass bolt is suggested to be 6 m and the development of extrusion deformation is segmented into three stages.

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