• 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 (10): 1015-1021.DOI: 10.3973/j.issn.1672-741X.2015.10.007

• 研究与探索 • 上一篇    下一篇

地铁盾构隧道下穿宁启铁路的变形影响规律及控制技术

冯超1, 高志刚2   

  1. (1. 中铁七局集团西安工程公司, 陕西 西安 710032; 2. 西安科技大学建筑与土木工程学院, 陕西 西安 710054)
  • 收稿日期:2015-05-21 修回日期:2015-07-27 出版日期:2015-10-20 发布日期:2015-11-09
  • 作者简介:冯超(1983—),男,河南辉县人,2010年毕业于西安科技大学,地下工程专业,硕士,工程师,主要从事地下工程的施工与技术管理工作。

Rules and Control Technology of Deformation Caused by Shield Boring Crossing Underneath Existing NiQi Railway

FENG Chao1, GAO Zhigang2   

  1. (1. Xi’an Engineering Co., Ltd., China Railway Seventh Bureau Group, Xi’an 710032, Shaanxi, China; 2. School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, Shaanxi, China)
  • Received:2015-05-21 Revised:2015-07-27 Online:2015-10-20 Published:2015-11-09

摘要:

地铁隧道在下穿既有铁路时,保证其安全运营是施工中的关键问题之一。为保证南京地铁S8线某段盾构隧道下穿宁启铁路桥涵的安全,通过建立FLAC三维数值模型进行计算分析,并将监测结果和计算结果进行对比分析,得出以下结论: 1)盾构下穿期间,在对地层进行水泥注浆、加固土体的同时,还应加强同步注浆和二次注浆,设定施工控制区域,并将盾构施工参数精确到每一环。2)地层加固前后的地表变形规律,采取加固措施可以将地铁下穿带来的铁路沉降影响降至0.7 mm。3)根据现场情况制定了地表变形监测方案。结果显示,路基地表沉降较之桥涵沉降值显著一些,但仍处于安全范围之内。

关键词: 南京地铁, 铁路, 桥涵, 路基, 盾构, 地基加固, 监测

Abstract:

A shieldbored running tunnel of Line S8 of Nanjing Metro crosses underneath existing NiQi railway. It is of great importance to ensure the normal operation of the existing railway during the shield boring. In the paper, the deformation of the ground caused by shield boring is analyzed by means of FLAC 3D numerical model, and comparison and contrast is made between the measured deformation and the calculated deformation. Conclusions drawn are as follows: 1) In addition to the grouting reinforcement made to the ground, simultaneous grouting and secondary grouting shall also be strengthened during shield boring, the critical control zones shall be established and specific shield boring parameters shall be determined for each segment ring; 2) Due to the ground reinforcement measures taken, the settlement of the existing railway caused by shield tunneling can be reduced to 0.7 mm; 3) The monitoring result shows that the ground surface settlement of the subgrade of the existing railway is more serious than that of the bridge and culvert, but it is still within the limit. 

Key words: Nanjing Metro, existing railway, bridge and culvert, subgrade, shield, ground reinforcement, monitoring

中图分类号: