BORED TUNNELLING FOR THE CARACAS METRO

Designed to alleviate traffic congestion problems, the first 12.5 km of the Caracas metro will link housing areas with business and industrial districts. Approximately 30% of this length will run in twin circular, bored and segmentally lined tunnels. The underlying rock of the area consists of gneiss and schist with overlying sand and silty clay sediments. For the mixed conditions of the 2380 m western tunnels, Robbins 192S machines were used, while for the 1230 m long eastern tunnels lying in alluvial materials, a Lovatt M227 tunnelling machine was chosen. Excavation problems encountered during tunnel construction are briefly detailed. (TRRL)

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

  Morgan-Grampian Limited

  30 Calderwood Street
  London SE18 6QH,   England 
• Authors:
  • Howard, A J
• Publication Date: 1981-7

Media Info

• Features: Figures; Photos;
• Pagination: p. 13-15
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 13
  • Issue Number: 6
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Construction; Construction management; Drilling; Equipment; Excavation; Excavation and tunneling; Excavations; Gneiss; Rocks; Schist; Subways; Tunneling machines; Tunnels
• Geographic Terms: Caracas (Venezuela); Venezuela
• Old TRIS Terms: Gneisses; Subway construction
• ITRD Terms: 3666: Construction method; 3871: Drilling; 3674: Equipment; 5155: Excavation (process); 4154: Rock; 3374: Tunnel; 1191: Underground railway; 8124: Venezuela
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Public Transportation; I54: Construction of Tunnels;

Filing Info

• Accession Number: 00345720
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Mar 30 1982 12:00AM