Procedure for making in-situ manholes for underground electric a

Details Procedure for making in-situ manholes for underground electric a Procedure for making in-situ manholes for underground electric a

1992-07-27

1993-11-23

Friedman, Carl D.

Static structures (e.g., buildings)

Processes

Filling preformed cavity

52 20, 52100, 521696, 521697, 5274502, 174 37, E02D 2912

Patent

active

052632989

ABSTRACT:
Procedure for making in-situ underground manholes intended for the passage of electric and telephone ducts which are dimensioned so as to permit the operator's work inside for carrying out repairs, mounting, maintenance, etc. of electric and/or telephone networks. The procedure is based on obtaining a module made of a tough, nonconducting rust-proof light-weight material which is laid in the corresponding hole on the ground and then it is externally filled up with concrete to complete the manhole construction. The inner mould or module is made by joining together two identical square cross-section pieces with a longitudinal profile which will determine the manhole opening in this joining together of both pieces.

REFERENCES:
patent: 951192 (1910-03-01), Massey
patent: 3385012 (1968-05-01), Lovegreen
patent: 3543457 (1970-12-01), Budlong
patent: 3672103 (1972-06-01), Kost
patent: 3745738 (1973-07-01), Singer
patent: 3938285 (1976-02-01), Gilbu
patent: 3974599 (1976-08-01), Grosh
patent: 4089139 (1978-05-01), Moffa et al.

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