Weight restrictions over a culvert driven through a railway embankment have been overcome by using a new jacking technique. In situ construction of the 6 M long 3.35 M X 3.30 M sections in the jacking pit was not possible because of their large size and short driving period allowed. Five 1.2 M long segments were pre-cast, lifted separately into the jacking pit and clamped together before jacking. Joints between the segments were designed to withstand jacking forces. The jacked section of the culvert was elongated by 10 M more than was first planned to ease the piling of head walls. An intermediate jacking station was fitted between each 6 M section so that they could be moved independently reducing drag and stress. Difficulties were experienced when the sand of the embankment proved to be more free-running than expected and removal of the end of an old wooden pile using a chain saw set up vibration causing settlement to occur between the two sets of tracks. Sand tables were then incorporated in the shield to cope with the loose sand conditions.

  • Availability:
  • Corporate Authors:

    IPC Building and Contract Journals Limited

    Surrey House, 1 Throwley Way
    Sutton, Surrey SM1 4QQ,   England 
  • Authors:
    • Heywood, P
  • Publication Date: 1978-9-7


  • English

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 32-33
  • Serial:
    • Volume: 285
    • Issue Number: 5166
    • Publisher: Reed Business Information, Limited
    • ISSN: 0010-7859

Subject/Index Terms

Filing Info

  • Accession Number: 00188330
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 27 1979 12:00AM