초록 ▼

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

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.

대표청구항 ▼

A process for making an underground manhole comprising: excavating a hole at a desired location, the hole having a surrounding surface; providing a first molded member in the hole, the first molded member having a pair of walls substantially perpendicular to each other, the walls of the first molded

A process for making an underground manhole comprising: excavating a hole at a desired location, the hole having a surrounding surface; providing a first molded member in the hole, the first molded member having a pair of walls substantially perpendicular to each other, the walls of the first molded member having an upper portion, an intermediate portion and a lower portion, the intermediate portion being tapered outwardly from the upper portion to the lower portion; providing a second molded member, having walls substantially identical in construction to the walls of the first molded member, in the hole; connecting the first and second molded members to each other to define a chamber by connection means located on edges of the walls on the first and second molded members; and filling in a space between the first and second molded members and the surrounding surface of the hole.