Procedure for making in-situ manholes for underground electric and telephone lines ductwork.

摘要

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 rustproof 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 (1) with a longitudinal profile which will determine the manhole opening in this joining together of both pieces. <IMAGE>