THERE'S MORE TO MANHOLES THAN MEETS THE EYE

Most manholes are constructed in pre-cast concrete; the author describes the requirements for its use giving as example the design of manholes for the refurbishment of the deep access shafts of the broadstairs arterial sewer in Kent. Manhole Standard 5911 defines chamber and taper units, reducing slabs, shaft units and cover slabs of heavy and light duty. Sizes covered are now up to DN 3000 and reducing slabs are introduced as an alternative to taper units. Joints between chamber, taper and shaft units may be either rebated, ogee or tongue and groove. Sealing of the joints is by cement mortar, bitumastic cord, gun-grade mastic or rubber gaskets. Construction requirements are covered by British Standard Codes of Practice CP 2005 and CP 301. Manhole construction is often performed by a different gang than that which previously laid the sewer; however, a method is outlined where it can form part of the pipe laying operation. Landing platforms should be provided in chambers where the depth exceeds 6 M. The design of a side-entry manhole available for pipes of DN 1200 and above is discussed. (TRRL)

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  • Corporate Authors:

    Specialist and Professional Press

    Surrey House, 1 Throwley Way
    Sutton, Surrey SM1 4QQ,   England 
  • Authors:
    • Elliott, A J
  • Publication Date: 1984-2

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 10-12
  • Serial:
    • SURVEYOR
    • Volume: 163
    • Issue Number: 4779
    • Publisher: Hemming Group, Limited
    • ISSN: 0039-6303

Subject/Index Terms

Filing Info

  • Accession Number: 00387232
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 30 1984 12:00AM