Modular buried manhole for receiving water meter, has tubular segments whose peripheral wall is equipped with annular flange forming internal annular braced stiffener and external annular braced stiffeners

摘要

The manhole (1) has encasable annular walls formed by encasable tubular segments (1a-1d) that are made of a plastic material i.e. polypropylene. The tubular segments comprise a peripheral wall (100) with an ovalized section and equipped with an annular flange comprising veils (2a-2d) by ribs and a platform (10), where the flange forms an internal annular braced stiffener (4b) and external annular braced stiffeners (4a, 4c, 4d). Semicircular housings comprise a sectile cover. One of the tubular segments is equipped with a staged peripheral wall widening from a basic wall (6).