BAY WINDOW FOR TUNNELLERS

This article reports on work on tunnels and stations for Singapore's third mass transit line, the North East Line (NEL), which should result in a state-of-the-art driverless metro by 2002. The new line will go to the airport, and have 16 new stations. Two full scale (MRT) lines and more light rail transit (LRT) lines are being planned for the near future, together with new 'circle' links later on. According to these plans, there should be about 140km of MRT and LRT by 2002, and about 210km by 2010. The twelve contracts for the NEL are almost a laboratory for tunnelling techniques, as different contractors have chosen different machines and methods. Some of the tunnels are cut and cover and most of the stations use open cut excavation, but most tunnels are full bore with precast concrete segment linings. The drives, which are now almost all complete, have had to go through three main soil types: alluvium, clay, and harder mudstones and sandstone. Most contractors use earth pressure balance tunnel boring machines (TBMs). Some interesting results should be obtained about the comparative performance of different models of TBMs, and these findings are to be presented at a conference in November 2000. Each new station will be integrated into its neighbourhood, with links to local housing and bus connections.

• Corporate Authors:

  EMAP CONSTRUCT LIMITED

  151 ROSEBERY AVENUE
  LONDON,   United Kingdom  EC1R 4QX
• Authors:
  • Greeman, A
• Publication Date: 2000-8

Language

• English

Media Info

• Pagination: p. 8-10
• Serial:
  • NEW CIVIL ENGINEER INTERNATIONAL, TESUNG KWAN O SUPPLEMENT
  • Issue Number: 65
  • Publisher: EMAP CONSTRUCT LIMITED

Subject/Index Terms

• TRT Terms: Conferences; Construction; Contractors; Contracts; Cut and cover tunneling; Methodology; Precast concrete; Public transit; Railroad stations; Rapid transit; Subways; Tunnel lining; Tunnels; Urban areas
• Uncontrolled Terms: Earth pressure balance machine
• Geographic Terms: Singapore
• ITRD Terms: 8525: Conference; 3655: Construction; 146: Contract; 136: Contractor; 3395: Cut and cover; 3381: Earth pressure balance machine; 9102: Method; 4792: Precast concrete; 744: Public transport; 1181: Rapid transit system; 8101: Singapore; 1095: Station (railway); 3374: Tunnel; 3385: Tunnel lining; 1191: Underground railway; 313: Urban area
• Subject Areas: Administration and Management; Bridges and other structures; Construction; Public Transportation; Terminals and Facilities;

Filing Info

• Accession Number: 00799851
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Oct 6 2000 12:00AM