NEW DEFLECTION TECHNIQUE FOR MEASURING FAILURE

A method is described by which the deflection in a wall of a buried pipe measured on site can be related to the predicted deflection at failure. An accurate telescopic gauge to measure deflection of both rigid and flexible pipes has been developed. The measured vertical deflection of pipes in the ground is compared with the failure deflection of a representative pipe tested in the British standard testing machine (BS 556). The telescopic gauge has a reproducibility of about 0.1 mm if removed between measurements or about 0.025 mm if left in position. Experience on site with the following types of large diameter pipe is described: conventional steel reinforced concrete, helically round glass-fibre reinforced concrete, random wire fibre strengthened concrete, plain concrete. It was shown that the technique is practical and could be a useful control technique during construction. /TRRL/

  • Corporate Authors:

    IPC Building and Contract Journals Limited

    Surrey House, 1 Throwley Way
    Sutton, Surrey SM1 4QQ,   England 
  • Authors:
    • LAWRENCE, GJL
  • Publication Date: 1978-8-17

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 9-11
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00188293
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 28 1979 12:00AM