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隧道建设(中英文) ›› 2016, Vol. 36 ›› Issue (4): 439-443.DOI: 10.3973/j.issn.1672-741X.2016.04.011

• 施工技术 • 上一篇    下一篇

盾构在富水粉细砂层中长距离平行下穿有压敏感管线施工控制技术

万俊峰1,2   

  1. (1. 中铁隧道集团有限公司, 河南 洛阳 471009; 2. 中铁隧道集团股份有限公司, 河南 郑州 450001)
  • 收稿日期:2015-09-11 修回日期:2016-01-27 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:万俊峰(1968—),男,河南漯河人,1990年毕业于石家庄铁道学院,隧道与地下工程专业,本科,高级工程师,现从事工程施工技术管理工作。Email: 631984109@qq.com。

Construction Control Technologies for Shield Tunnel Boring in  Waterrich Fine Silty Sand Strata and Parallel Crossing Underneath  Pressured Watersupply Pipeline

WAN Junfeng1,2   

  1. (1. China Railway Tunnel Group Co., Ltd., Luoyang 471009, Henan, China;  2. China Railway Tunnel Stock Co., Ltd., Zhengzhou 450001, Henan, China)
  • Received:2015-09-11 Revised:2016-01-27 Online:2016-04-20 Published:2016-04-27

摘要:

郑州地铁2号线国基路站—北环路站区间隧道在富水粉细砂地层中长距离下穿3条有压给水管线,给水管为混凝土管材,稳定性较差。为满足设计单位和产权单位对施工沉降的要求,分析盾构隧道下穿施工过程中,不均匀沉降导致地层土体变形的施工风险,地层沉降主要受刀盘结构形式、刀盘支撑形式(影响渣土改良效果)、渣土改良剂在刀盘上的注入位置3方面影响。从设备选择及改造、施工工艺措施方面予以优化: 1)盾构刀盘结构形式及相应配置要适应富水粉细砂层掘进和保压; 2)合理的施工参数及工艺措施对地表沉降控制的必要性。监测结果表明,管线最大沉降满足风险源控制目标。

关键词: 郑州地铁, 富水粉细砂层, 有压敏感管线, 盾构选型, 刀盘结构, 渣土改良, 监测

Abstract:

The Guojilu StationNorth Huanchenglu Station shield bored tunnel on Zhengzhou Metro Line No. 2 is located in waterrich fine silty sand strata and crosses underneath 3 existing pressured watersupply concrete pipelines. In order to meet the settlement control requirements, the construction risk of soil deformation induced by heterogeneous settlement is analyzed. The cutterhead structure type, cutterhead support type and injection points of ground conditioning agent on cutterhead are the main factors for ground settlement. Some suggestions are propased as follows: 1) The shield cutterhead structure type and related devices are very important. 2) Rational construction parameters and technologies are necessary. The monitoring results show that the maximum pipeline settlement can meet the risk control requirement.

Key words: Zhengzhou Metro, waterrich fine silty sand strata, pressured pipeline, shield type selection, cutterhead structure, ground conditioning, monitoring

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