SOME NOVEL TECHNIQUES IN PRECAST CONSTRUCTION

The article discusses four methods for overcoming transportation problems of handling long precast concrete beams for large spans. The methods involve the use of reinforced concrete box or u-beam segments designed to be prestressed together on site to form a single unit. In method 1 the segments have shaped ends from which protrude prestressing strands which are connected on-site using couplers. A development of this method is used in method 2, in which continuous, flexible tendons are used to join the beam segments. For handling, the segments are folded using the flexibility of the tendons and unfolded on-site. A further development of this method is used in method 3 in which a steel rocker bar is located in grooves formed on the compression side of the beam segment ends. Method 4 involves the use of precast segmental beams of reinforced concrete in place of pre-stressed concrete again using flexible reinforcement throughout the segments for ease of handling. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Cement and Concrete Association

  52 Grosvenor Gardens
  London SW1W 0AQ,   England 
• Authors:
  • Taylor, R
• Publication Date: 1974-8

Language

• English

Media Info

• Features: Figures; Photos;
• Pagination: p. 32-34
• Serial:
  • CONCRETE
  • Volume: 8
  • Issue Number: 8
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Beams; Box beams; Concrete; Concrete bridges; Construction projects; Design; Freight handling; Material reinforcement; Muscular tendons; Precast concrete; Prefabricated structures; Prestressed concrete; Prestressing; Reinforced concrete; Stiffness
• Uncontrolled Terms: Concrete beams; Prestressing strands; Reinforced concrete beams; U beams
• Old TRIS Terms: Haulage
• ITRD Terms: 3472: Beam; 9011: Design (overall design); 5149: Mechanical handling; 4792: Precast concrete; 3638: Prefabrication; 4796: Prestressed concrete; 3471: Reinforcement (in mater); 5931: Stiffness
• Subject Areas: Bridges and other structures; Construction; Design; Freight Transportation; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00096973
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jul 24 1975 12:00AM