CONSTRUCTION OF THE CHEUNG CHING TUNNEL

This article describes the construction of the Cheung Ching Tunnel in Hong Kong, which was begun in May 1993 and completed in January 1997. It is a 1.6km twin-bored tunnel, carrying the three-lane dual carriageway of the important new Route 3. The tunnel is located on Tsing Yi island, and both of its ends are linked to bridges. A tunnel through the central part of the island was chosen, because it would minimise environmental impact and disturbance to existing or proposed property developments. Dragages et Travaux Publics won the contract to build the tunnel and various other structures. Two Tamrock Datasuper 260G twin-boom jumbos were used to excavate the bores, each of which has a 17m-wide 10m-high excavated cross-section and a 15m-wide 9m-high finished cross-section. Drill+blast excavation was carried out from both sides simultaneously, and was conducted full face from the west portal. The rock was mainly granite of medium to good quality, except for the first 400m from the west portal, which also contained fractured rhyolite and tuff. For the first time in Hong Kong, a special gasified emulsion, based on ammonium nitrate, was used for the blasting work. Construction of the tunnel's concrete lining began about 200-300m behind the cut face. A longitudinal ventilation system with 72 jet fans was installed under the ceiling.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0041414X
• Corporate Authors:

  Miller Freeman

  Calderwood Street
  London,   United Kingdom  SE18 6QH
• Authors:
  • TAM, A
• Publication Date: 1997-6

Language

• English

Media Info

• Pagination: p. 25-6
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 29
  • Issue Number: 6
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Bridges; Construction; Drilling; Freeways; Granite; Presplitting (Blasting); Tunnel lining; Tunnels
• Geographic Terms: Hong Kong (China)
• ITRD Terms: 5188: Blasting; 3455: Bridge; 3655: Construction; 3871: Drilling; 4101: Granite; 8131: Hong Kong; 2752: Motorway; 3374: Tunnel; 3385: Tunnel lining
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

• Accession Number: 00742983
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Nov 26 1997 12:00AM