土工基础

›› 2018, Vol. 32 ›› Issue (6): 590-593.

• 工程实录 • 上一篇    下一篇

盾构近距离上穿既有地铁隧道施工技术与控制措施

路国樑1，刘 斌2，杨 磊2，冯兴仁2，陈保国3   

  1. (1.港铁技术咨询（深圳）有限公司，广东深圳 518000；2.中国水利水电第七工程局有限公司，成都 610081；
    3.中国地质大学（武汉）工程学院，武汉 430074)
  • 收稿日期:2018-03-05 修回日期:2018-03-29 出版日期:2018-12-20 发布日期:2018-12-21
  • 通讯作者: 陈保国（1981-），男，博士，副教授，研究方向为岩土体与结构物相互作用。
  • 作者简介:路国樑（1976-）,男，硕士，工程师，研究方向为轨道交通工程设计与管理。

Construction Control Methods of a Shielded Tunnel Over Crossing an Existing Operating Metro Tunnel

LU Guoliang1, LIU Bin2, YANG Lei2, FENG Xingren2, CHEN Baoguo3   

  1. (1.Mass Transit Railway Technical Consulting Co., Ltd., Shenzhen, 518000；2.Sinohydro Bureau 7 Co., Ltd., Chengdu 610081；
    3.College of Engineering, China University of Geosciences, Wuhan 430074)
  • Received:2018-03-05 Revised:2018-03-29 Online:2018-12-20 Published:2018-12-21

摘要： 在城市轨道交通建设中，新建地铁隧道盾构穿越近接既有构筑物是一种常见的情况，而盾构小净距、长距离斜交上穿既有线隧道施工实属少见，如何保证盾构施工的安全性、稳定性是工程建设中的难点。以深圳地铁5号线二期工程前湾站—桂湾站盾构区间小净距、长距离斜交穿既有运营11号线南山站—前海湾站区间为背景，综合采用软土加固技术、盾构掘进参数控制措施、自动化监测系统和风险应急推演管理措施等技术手段，确保盾构安全顺利施工和既有线正常运营。

关键词: 盾构, 小净距, 上穿, 施工技术, 控制措施

Abstract: It is not unusual in the construction of an urban rail transit tunnel underneath the existing structures. However, it is rare for a shielded tunnel that is over crossing the existing operating metro tunnel at a close distance. The challenge in the construction was the safety as well as the stability of both new shielded tunnel and the exiting operating metro tunnel. This paper presents a case history of constructing the shielded tunnel zone in Qianwan Station of No.5 Line. The new shielded tunnel would over cross the existing operating No. 11 tunnel between Nanshan and Qianwan stations at a very close distance. The measures to ensure the construction safety and stability were used. These measures included soil improvement, excavation parameter control of the shielded tunnel excavation, automatic and live construction instrumentation monitoring as well as emergency response backups.

Key words: Shielded Tunnel Excavation, Close Distance, Over Crossing, Construction Measures, Construction Controls