AUGER-INJECTED PILES IN NORWICH

A number of important factors governed the choice of piling system for some 200 piles in the city centre of Norwich. Because of the location, and the presence of an old sewer, minimum vibration and noise was desirable. Poor ground conditions were also a contributory factor leading to the installation of cemcore piles to carry working loads of 56 tonnes. Details are given of the method used, where the pile is formed by screwing a continuous flight auger into the ground, pumping in a sand-cement grout through the hollow stem, and forming the pile as the auger is withdrawn. The reinforcement cage is placed by lowering it into the upper section of the column after grouting while it is still fluid. It is claimed that the system was suited to soft materials and could be used in estuarine regions. No hole lining was required, eliminating the noise and vibration associated with lining installation. Tests at Norwich have included conventional load-testing and non-destructive methods using a seismic technique to identify changes in a wave reflected from the pile toe. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727700804
• Corporate Authors:

  Foundation Publications Limited

  7 Ongar Road
  Brentwood CM15 9AU, Essex,   England 
• Publication Date: 1980-1

Language

• English

Media Info

• Features: Figures; Photos;
• Pagination: p. 24-27
• Serial:
  • GROUND ENGINEERING
  • Volume: 13
  • Issue Number: 1
  • Publisher: EMAP CONSTRUCT LIMITED
  • ISSN: 0017-4653

Subject/Index Terms

• TRT Terms: Cement grouts; Grouting; Load tests; Nondestructive tests; Piles (Supports); Reflection; Sand; Seismicity; Sound level; Vibration
• Uncontrolled Terms: Drilled shafts; Injection
• Old TRIS Terms: Seismic reflection
• ITRD Terms: 3085: Bearing capacity; 4758: Cement; 3871: Drilling; 3377: Foundation; 4729: Grout; 3617: Injection (mater); 5567: Load; 6216: Non destructive testing; 3399: Pile; 4105: Sand; 5731: Seismic; 6748: Sound; 6255: Test; 311: Town centre; 5558: Vibration
• Subject Areas: Construction; Geotechnology; Highways;

Filing Info

• Accession Number: 00322481
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0 7277 0080 4
• Files: ITRD, TRIS
• Created Date: Mar 12 1981 12:00AM