FRANKI GOES TO THE UK
This article describes Atlas Palen's vibrationless screw piling technique, which was developed in Belgium in the 1960's and is about to be introduced to the UK. The technique relies on powerful rigs with extremely high torque, that are specially designed for the system. It involves screwing a soil-compression auger into the ground using a hollow mandrel, so that a hole up to 23m deep is formed without removing any spoil. When founding level is reached, a thin cage of nominal reinforcement is lowered into the mandrel, rotation of the auger is reversed, and concrete is fed in through a hopper. The mandrel and auger are wound out of the ground, to leave a pile of compacted concrete with a spiral thread formed within the compacted soil around the shaft. Pile capacities of the order of 100 tonnes are normal, depending on the soil. Advantages of the system include: (1) the need for only two operatives to drive and attend the self-contained rig; (2) no need for a separate mobile, because a crude but effective crane jib is built-in; and (3) no need for attendant machines and minimum production of mess, because there is no spoil to remove. Screw piles are ideally suited to difficult estuary soils; because of their total absence of vibration, they strongly rival driven piling in urban areas. (TRRL)
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03077683
-
Corporate Authors:
Thomas Telford Limited
London, United Kingdom -
Authors:
- WINNEY, M
- Publication Date: 1990-9-13
Language
- English
Media Info
- Pagination: p. 23-4,26
-
Serial:
- NEW CIVIL ENGINEER
- Issue Number: 913
- Publisher: EMAP CONSTRUCT LIMITED
- ISSN: 0307-7683
Subject/Index Terms
- TRT Terms: Augers; Construction equipment; Pile driving
- Old TRIS Terms: Auger borings; Pile bearing capacities; Screw piles
- ITRD Terms: 3666: Construction method; 3377: Foundation; 9046: Minimum; 3399: Pile; 313: Urban area; 5558: Vibration
- Subject Areas: Construction; Highways;
Filing Info
- Accession Number: 00617578
- Record Type: Publication
- Source Agency: Transport and Road Research Laboratory (TRRL)
- Files: ITRD, TRIS
- Created Date: Nov 30 1991 12:00AM