THE ENVILLER MICROTUNNELLING SYSTEM .NO-DIG 89. DEVELOPMENTS UNDERGROUND. PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON TRENCHLESS CONSTRUCTION FOR UTILITIES, LONDON, APRIL 11-14, 1989

This article describes the enviliner microtunnelling machine with a steering system which is capable of laying pipe of thin or lighter material such as upvc (unplasticized polyvinylchloride). In the enviliner system, only the pushing force counterbalanced by the frictional resistance is applied to the pipe. The liner casing, which contains the screw conveyor, together with the auger flight, transmits the jacking force to the pilot tube. This is in contrast to conventional microtunnelling equipment, where the jacking force is transmitted through the previously laid pipes by compression. Brief details of the equipment is provided, as are details of pipe lines laid by this method. The system can be used in soils ranging from very soft to dense or hard, in diameters ranging from 200 mm to 300 mm, and for up to 50 m distances with deviations of less than 25 mm in the vertical plane and less than 50 mm in the horizontal plane. The overall cost of the enviliner method is about 30-40% less than the cost of laying concrete pipes. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727715674
• Corporate Authors:

  International Society for Trenchless Technology

  15 John Street
  London,   England 
• Authors:
  • AKIBA, T
  • YAMADA, T
• Publication Date: 1989

Media Info

• Pagination: p. 243-51
• Serial:
  • Publication of: International Society for Trenchless Technology
  • Publisher: International Society for Trenchless Technology

Subject/Index Terms

• TRT Terms: Conferences; Costs; Design; Equipment; Errors; Excavations; Field tests; Pipe; Pipe laying; Polyvinyl chloride; Tunnels; Underground structures
• Uncontrolled Terms: Micro; Subterranean
• ITRD Terms: 8525: Conference; 224: Cost; 9011: Design (overall design); 3674: Equipment; 6440: Error; 5155: Excavation (process); 6226: In situ; 9045: Micro; 3361: Pipe; 3371: Pipe pushing; 7420: Polyvinylchloride; 4372: Subterranean; 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction; Design; Finance; Geotechnology; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00497724
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-7277-1567-4
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM