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隧道建设(中英文) ›› 2012, Vol. 32 ›› Issue (增刊2): 66-71.DOI: 10.3973/j.issn.1672-741X.2012.z2.013

• 规划与设计 • 上一篇    下一篇

码头变电站电缆隧道下穿秦淮河关键技术

王怀东1,彭红霞2,覃伟1   

  1. (1.中铁隧道勘测设计院有限公司,天津 300133;2.南京地铁建设有限责任公司,南京 210008)
  • 收稿日期:2012-08-16 修回日期:2012-09-18 出版日期:2012-12-20 发布日期:2013-02-19
  • 作者简介:王怀东(1982—),男,四川仪陇人,2004年毕业于西南交通大学土木工程专业,本科,工程师,现从事深基坑、隧道及地下工程设计研究工作。

Discussions on the Key Construction Technologies for  Cable Tunnel Underneath Qinhuai River

WANG Huaidong1, PENG Hongxia2, QIN Wei1   

  1. (1.China Railway Tunnel Survey & Design Institute, Co., Ltd., Tianjin 300133,China; 2.Nanjing Metro Construction Co., Ltd., Nanjing 210008,China)
  • Received:2012-08-16 Revised:2012-09-18 Online:2012-12-20 Published:2013-02-19

摘要:

码头变电站送电工程电缆隧道穿越整治后的秦淮河,场地地下水位高,河道下卧软弱地层,河堤设置有较长的抗滑桩,施工工法的选择受到很大限制,施工过程中河堤的保护十分困难,隧道内防排水系统要求高。通过对各种水下隧道施工工法的综合比较,分析河床冲刷等因素对隧道埋深的影响,推荐采用盾构法作为施工工法。通过对河堤稳定性、安全性的计算分析,提出采用桩基托换和注浆加固相结合的方法加固提岸后盾构掘进的方案;通过施工操作性和工程安全性的综合对比,提出隧道单面坡排水、盾构井内设置提升泵房的排水方案。实践表明隧道工法的选择和堤防处理措施是安全、可靠的,隧道排水方案是有效、可行的,可为类似工程提供参考。

关键词: 盾构隧道, 河床冲刷, 堤防抗滑桩, 桩基托换, 隧道排水

Abstract:

The construction of the cable tunnel underneath Qinhuai River of a transformer substation at dock is a great challenge,as a result of high water table,soft ground under riverbed,deep friction piles in embankment,restricted construction methods,embankment protection during tunneling and high requirement of tunnel drainage.Finally,shield machine was selected for the cable tunnel construction after an overall comparison of underwater tunnel construction methods and analysis of the influences of riverbed erosion and other factors on tunnel cover.In addition,pile foundation underpinning and grouting are proposed for embankment reinforcement before tunneling after analysis of embankment stability and safety;and a tunnel drainage scheme is draw up through comparison of practicability and safety,including single slope drainage and pumping station in launching shaft.The smooth construction of the cable tunnel shows that the selected construction method and embankment reinforcement measures are safe and reliable,and the tunnel drainage scheme is effective and practical. 

Key words: shield tunnel, riverbed erosion, friction pile for embankment, pile foundation underpinning, tunnel drainage