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隧道建设(中英文) ›› 2020, Vol. 40 ›› Issue (S1): 389-395.DOI: 10.3973/j.issn.2096-4498.2020.S1.051

• 施工技术 • 上一篇    下一篇

南宁地铁5号线“泥水+土压”双模式盾构掘进模式快速转换关键技术

徐敬贺   

  1. (中铁隧道股份有限公司, 河南 郑州 450001)
  • 出版日期:2020-08-30 发布日期:2020-09-15
  • 作者简介:徐敬贺(1988—),男,河北保定人,2011年毕业于辽宁工程技术大学,工程力学专业,本科,工程师,主要从事盾构施工管理工作。E-mail:1536272402@qq.com。

Key Technology of Rapid Conversion of Slurry/Earthpressure Dualmode Shield Tunneling in Nanning Metro Line No. 5

XU Jinghe   

  1. (China Railway Tunnel Stock Co., Ltd., Zhengzhou 450001, Henan, China)
  • Online:2020-08-30 Published:2020-09-15

摘要: 以南宁地铁5号线五新区间为工程背景,对并联式双模盾构掘进模式快速转换技术进行介绍。并联式双模盾构“土压+泥水“平衡掘进模式均可以独立运行。掘进过程中采用双模式盾构2套出渣系统相配合的方式改变舱内渣土性状,以满足螺旋输送机和泥浆管道出渣要求,进而启动相应模式下渣土改良方式完成掘进模式转换。通过以上措施双模式盾构完成计划内模式转换2次、试验性掘进模式转换12次,共计14次,未出现明显螺旋输送机喷涌或泥浆管道堵塞的情况,地表沉降控制良好。

关键词: “泥水+土压”双模式盾构, 掘进模式转换, 渣土改良, 土舱压力, 旁通模式

Abstract: The rapid tunneling mode conversion technology of parallel dualmode shield used in Wuyi Overpass StationXinxiu Park Station Section on Nanning Metro Line No. 5 is introduced. The slurry mode and earthpressure mode of the dualmode shield can be available separately. The cooperation of two series of mucking system can improve the soil in chamber to meet the mucking requirement of screw conveyor and slurry pipe, which can guarantee the mode conversion by soil conditioning. Two times of mode conversion of the shield have been conducted within plan, and 12 times of experimental mode conversion have been conducted; no slurry gushing of screw conveyor of slurry pipe block occurs, and the surface settlement has been effectively controlled.

Key words: slurry/earthpressure dualmode shield, tunneling mode conversion, ground conditioning, soil chamber pressure, bypass mode

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