Bridge construction above existing underground railway tunnels - A case study from Cheong-Gye Cheon restoration project

A river restoration work named 'Cheong-gye Cheon Restoration Project' launched in July 2003 in Seoul, Korea. The project includes construction of 21 new bridges. Four bridges among them were planned above running tunnels which are about 10m below ground surface, and of which axis is parallel to bridge axis. All bridges were for heavy vehicle traffic. The subway tunnels were constructed by the sprayed concrete lining method (SCL), i.e., NATM, in between 1983 and 1995. In design phase several measures to reduce the impact of bridge loads on the railway tunnels were considered. It was required to design bridge abutments to avoid eccentric loads on the tunnel and reduce stresses causing any structural harm to the running tunnels. Balance of construction loads was the main issue during construction. Two different foundation methods were employed: piled-foundation and grouted-foundation. To evaluate the behaviour of ground and tunnel, three dimensional numerical modelling was performed using the computer program MIDAS/GTS. Construction management program including intensive instrumentation of the running tunnels was implemented to secure safe construction. The bridges were successfully completed without damages to the running tunnels. Design analysis, instrumentation and construction performance are presented and reviewed in this paper. It is found that the piled-foundation is beneficial in reducing the impact of the bridge load, meanwhile the grouted-foundation is more cost-effective. (A) This paper was presented at Safety in the underground space - Proceedings of the ITA-AITES 2006 World Tunnel Congress and the 32nd ITA General Assembly, Seoul, Korea, 22-27 April 2006. For the covering abstract see ITRD E129148. "Reprinted with permission from Elsevier".

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08867798
• Authors:
  • SHIN, J H
  • MOON, J h
  • LEE, I K
  • HWANG, K Y
• Publication Date: 2006-5

Language

• English

Media Info

• Pagination: 321-22
• Monograph Title: Rock chain 1: A set of codes for the studies of blocks instability inside a tunnel
• Serial:
  • Tunnelling and Underground Space Technology
  • Volume: 21
  • Issue Number: 3-4
  • Publisher: Elsevier
  • ISSN: 0886-7798
  • Serial URL: https://www.sciencedirect.com/journal/tunnelling-and-underground-space-technology

Subject/Index Terms

• TRT Terms: Bridges; Concrete; Construction; Design; Safety; Stresses; Tunnels
• ITRD Terms: 3455: Bridge; 4755: Concrete; 3655: Construction; 9011: Design (overall design); 1665: Safety; 5575: Stress (in material); 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction; Design; Safety and Human Factors; I53: Construction of Bridges and Retaining Walls; I54: Construction of Tunnels;

Filing Info

• Accession Number: 01032484
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Sep 6 2006 1:52PM