浅埋暗挖大跨黄土隧道下穿地下行包通道沉降分析及对策

doi:10.3973/j.issn.1672-741X.2016.01.012

隧道建设（中英文） ›› 2016, Vol. 36 ›› Issue (1): 80-85.DOI: 10.3973/j.issn.1672-741X.2016.01.012

浅埋暗挖大跨黄土隧道下穿地下行包通道沉降分析及对策

唐新权

（中铁第一勘察设计院集团有限公司，陕西西安 710043）

收稿日期:2015-07-19 修回日期:2015-09-24 出版日期:2016-01-20 发布日期:2016-02-01
作者简介:唐新权（1978— ）,男，河北抚宁人，2000年毕业于石家庄铁道学院,隧道及地下工程专业，本科，高级工程师，现从事地下工程设计工作。E-mail： 17962123@qq.com。

Settlement Analysis on and Countermeasures for Shallowcovered  Largespan Loess Tunnel Constructed by Mining Method Crossing Underneath Baggagededicated Gallery of Airport

TANG Xinquan

(China Railway First Survey & Design Institute Group Co., Ltd., Xi’an 710043, Shaanxi, China)

Received:2015-07-19 Revised:2015-09-24 Online:2016-01-20 Published:2016-02-01

摘要/Abstract

摘要：

机场地下行包通道沉降控制要求高，且不能中断运行，新建浅埋暗挖大跨黄土隧道下穿施工风险高，施工不当会引起地下行包通道沉降、变形，甚至引起混凝土结构开裂。为找出下穿隧道施工过程中引起通道底沉降的关键步序，更好地控制沉降，采用三维数值模拟方法对新建隧道下穿机场地下行包通道进行了沉降分析，并通过在隧道开挖过程中洞内采用分步开挖、大直径管棚超前预支护、初期支护和二次衬砌背后回填压浆等沉降控制措施，将通道底板沉降控制在3 mm左右，并在施工过程中加强监测，能够保证既有地下行包通道的结构安全。

关键词: 大跨黄土隧道, 下穿地下行包通道, 浅埋暗挖法, 三维数值模拟, 沉降分析, 双侧壁导坑, 大管棚, 回填压浆

Abstract:

The settlement, deformation and concrete structure crack, may occur to the gallery due to the high construction risk and irrational construction of the shallowcovered largespan loess tunnel. In this paper, in order to satisfy the requirements of the baggagededicated gallery and to control the settlement, 3D numerical simulation method is used to analyze the settlement caused by new tunnel crossing underneath baggagededicated gallery of the airport. In addition, some effective measures, such as strengthening the monitoring and using effective technologies (including excavation step by step, advance support by means of largediameter pipe roof and grout backfilling behind primary support and secondary lining) have been adopted to minimize the settlement of the baggagededicated gallery. The settlement of the gallery floor is limited to about 3 mm, which guarantees the safety of the baggagededicated gallery.

Key words: largespan loess tunnel, crossing underneath baggagededicated gallery, shallowcover mining method, 3D numerical simulation, settlement analysis, doubleside heading, large pipe roof, backfill grouting

中图分类号:

U 455.4

唐新权. 浅埋暗挖大跨黄土隧道下穿地下行包通道沉降分析及对策[J]. 隧道建设, 2016, 36(1): 80-85.

TANG Xinquan. Settlement Analysis on and Countermeasures for Shallowcovered  Largespan Loess Tunnel Constructed by Mining Method Crossing Underneath Baggagededicated Gallery of Airport[J]. Tunnel Construction, 2016, 36(1): 80-85.

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浅埋暗挖大跨黄土隧道下穿地下行包通道沉降分析及对策

Settlement Analysis on and Countermeasures for Shallowcovered  Largespan Loess Tunnel Constructed by Mining Method Crossing Underneath Baggagededicated Gallery of Airport

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