- CSCD核心中文核心科技核心
- RCCSE(A+)公路运输高质量期刊T1
- Ei CompendexScopusWJCI
- EBSCOPж(AJ)JST
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
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 (ADECORS)
Received date: 2016-09-14
Revised date: 2017-02-22
Online published: 2017-06-08
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。
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
ADECORS (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 abovementioned 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) Threedimensional 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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