• 中国科学引文数据库(CSCD)来源期刊
  • 中文核心期刊中文科技核心期刊
  • Scopus RCCSE中国核心学术期刊
  • 美国EBSCO数据库 俄罗斯《文摘杂志》
  • 《日本科学技术振兴机构数据库(中国)》
二维码

隧道建设(中英文) ›› 2015, Vol. 35 ›› Issue (12): 1264-1270.DOI: 10.3973/j.issn.1672-741X.2015.12.005

• 研究与探索 • 上一篇    下一篇

黄土盾构下穿护城河拱桥FLAC3D预测与施工安全防控技术

曹振1, 杨锋2,3, 张宁1,3   

  1. (1.西安市地下铁道有限责任公司, 陕西 西安 710018; 2.中铁十五局集团有限公司, 上海 200070; 3.西安科技大学, 陕西 西安 710054)
  • 收稿日期:2015-02-12 修回日期:2015-05-29 出版日期:2015-12-20 发布日期:2016-01-08
  • 作者简介:曹振(1978—),男,广东清远人,2001年毕业于长安大学,地下工程与隧道工程专业,博士,高级工程师,现从事地铁工程建设与技术管理工作。

Prediction and Construction Safety Control for Shield Undercrossing Moat Arch Bridge in Loess Area by means of FLAC3D

CAO Zhen1, YANG Feng2,3, ZHANG Ning1,3   

  1. (1. Xi’an Subway Co. Ltd., Xi’an 710018, Shaanxi, China; 2. China Railway 15th Bureau Group Co., Ltd., Shanghai, 200070, China; 3. Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China)
  • Received:2015-02-12 Revised:2015-05-29 Online:2015-12-20 Published:2016-01-08

摘要:

黄土地区地铁盾构施工安全防控技术研究具有较高的理论意义与应用价值,位于黄土地区的西安地铁盾构工程具有地表条件复杂、穿越文物和建(构)筑物多等特点。以西安地铁二号线安远门—北大街区间盾构隧道施工下穿护城河拱桥工程为背景,采用FLAC3D数值模拟方法预测了盾构下穿护城河拱桥施工引起的拱桥变形,计算结果表明,在施工前必须对拱桥及下方地层进行加固,才能确保施工过程拱桥安全稳定。提出在拱桥区域内堆载沙袋、在拱桥基础背后进行袖阀管注浆的加固措施,现场实测表明,拱桥变形在允许范围之内,提出的施工安全防控技术合理有效。

关键词: 黄土地区, 盾构隧道, 护城河拱桥, 数值模拟, 防控技术

Abstract:

It is of great importance to study the safety control technology for shield boring in loess. The shieldbored tunnels of Xi’an Metro, which are located in loess strata, have to cross underneath complex ground surface conditions, cultural relics, buildings and structures. The shieldbored tunnel from Anyuanmen station to Beidajie station on Line 2 of Xi’an Metro crosses underneath a moat arch bridge. In the paper, the deformation of the moat arch bridge caused by shield boring is analyzed by means of FLAC3D program. The calculation result shows that the ground below the moat arch bridge has to be consolidated before shield boring, so as to ensure the safety and stability of the bridge. It is proposed that sand bags should be piled in the moat arch bridge zone and Soletanche grouting should be conducted behind the foundation of the bridge. The site measurement shows that the deformation of the moat arch bridge is within the allowance scope and the countermeasures taken are rational and effective.

Key words: loess area, shield tunnel, moatspanning arch bridge, numerical simulation, prevention and control

中图分类号: