RING OF SUCCESS

Excavation in soft or variable ground is generally an expensive and difficult operation requiring a shield or special type of TBM, or alternatively, ground freezing or chemical treatment. The article describes an alternative process, known as Trevitub, developed in Italy. The process is described as using Sandvik's Tubex drilling system to produce in one pass up to 70 sub-horizontal holes, in a semi-circular arch, to a depth of 12m. Reinforcing steel pipes are left in the ground into which cement grout is pumped under pressure which causes one-way valves in the tubes to open so allowing grout into the surrounding ground. This process is designed to create a strong, steel-pipe-reinforced cone of protection in the ground. Examples of the use of this system in highway projects in Italy are described. (TRRL)

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

  Morgan-Grampian (Construction Press) Limited

  Morgan-Grampian House, 30 Calderwood Street
  London SE18 6QH,   England 
• Authors:
  • Martin, David
• Publication Date: 1990

Language

• English

Media Info

• Features: References;
• Pagination: p. 42-44
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 22
  • Issue Number: 9
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Excavation and tunneling; Reinforcing steel; Soft soils
• ITRD Terms: 3674: Equipment; 5155: Excavation (process); 4729: Grout; 3617: Injection (mater); 8051: Italy; 3833: Pumping; 3689: Soil stabilization; 3374: Tunnel
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00609752
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Summer
• Files: ITRD, TRIS
• Created Date: Jun 30 1991 12:00AM