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隧道建设（中英文） ›› 2016, Vol. 36 ›› Issue (4): 403-410.DOI: 10.3973/j.issn.1672-741X.2016.04.006

• 研究与探索 • 上一篇    下一篇

杭州环北大直径泥水盾构隧道下穿高铁桥涵的实测分析

高东奇1, 廖少明1,2, 张迪3, 门燕青1   

  1. （1. 同济大学地下建筑与工程系， 上海 200092； 2. 同济大学岩土与地下工程教育部重点实验室， 上海 200092； 3. 中铁第四勘察设计院集团有限公司， 湖北 武汉 430063)
  • 收稿日期:2015-09-28 修回日期:2015-11-19 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:高东奇 (1991—)，男，〖JP+1〗吉林四平人，同济大学土木工程专业在读硕士，研究方向为盾构隧道施工环境影响。〖JP〗Email: dongqigao@126.com。
  • 基金资助:

    国家自然科学基金资助项目（51378389）； 国家重点基础研究发展计划（973计划）项目（2015CB057806）

Analysis of Monitoring of Large Diameter Slurry Shield Tunnel Crossing Underneath Highspeed Railway Bridge and Culvert： Case Study on North Huancheng Road Underground Expressway in Hangzhou

GAO Dongqi1, LIAO Shaoming1,2, ZHANG Di3, MEN Yanqing1   

  1. (1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, Hubei, China)
  • Received:2015-09-28 Revised:2015-11-19 Online:2016-04-20 Published:2016-04-27

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摘要：

杭州环北地下快速路隧道工程采用大直径（11.58 m）泥水平衡盾构浅覆土斜交下穿既有沪杭高铁桥涵。为确保高铁运营安全，对桥涵沉降进行监测，同时考虑盾构穿越施工阶段隧道所处的复杂环境条件，通过在管片中埋设纵向和环向钢筋应力计，对盾构施工引起的隧道纵向及环向结构响应进行全过程跟踪实测分析。监测结果表明： 桥涵最大纵向差异沉降率为0.20‰，最大横向差异沉降率为0.30‰，均在铁路安全控制标准内；在隧道穿越施工过程中，盾构总推力随盾构姿态的变化而变化，并对隧道管片受力和桥涵位移产生明显影响，其中，管片纵向轴力呈现“顶部大，底部小”的趋势，环向弯矩呈现“腰部最大，拱顶、拱底次之，两肩最小”的特点，桥涵倾斜方向也会发生变化。研究成果证明： 在大直径泥水盾构穿越施工过程中，为保障施工质量与安全，除了需要对穿越对象进行严格监控之外，对隧道本体进行监控研究也同等重要。

关键词: 隧道, 大直径泥水盾构, 下穿, 高铁桥涵, 位移监测, 沉降规律, 相互影响

Abstract:

Large diameter (11.58 m) slurry balance shield is used for boring North Huancheng Road underground expressway tunnel crossing underneath existing ShanghaiHangzhou highspeed railway bridge and culvert. Considering the complex environment the shield tunnel located and the safety of the running of highspeed railway, the longitudinal and circumferential structural responses induced by shield tunneling are monitored by means of longitudinal and circumferential rebar stressmeter. The monitoring results show that: 1) The longitudinal and circumferential differential settlement rates are 0.20‰ and 0.30‰, which can meet the requirement of safe construction of railway. 2) The thrusting force of shield varies with the change of shield attitude and has a significant influence on segment force and displacement of bridge and culvert; the longitudinal axial force of the segment top is larger than that on the segment feet; the circumferential bending moment of the segment waist followed by that of the segment top and that of segment feet; and the circumferential bending moment of the segment shoulder is the smallest. The study results show that the monitoring of the shield tunnel structure is important as well.

Key words: tunnel, large diameter slurry shield, underneath crossing, highspeed railway bridge and culvert, displacement monitoring, settlement regular, interaction

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