To provide a reinforced structure of a branch pipe, having sufficient strength usable even in a hydraulic pipeline of large bore with a high fluid pressure, which moreover can reduce a cost of manufacture.
A reinforced beam P is constituted by forming it in a box type with a pair of side plates 1a, 1b formed of steel material, an inner flange 2 mounted between internal peripheral circular arcs of this side plate 1a, 1b, and an outer flange 3 mounted between external peripheral circular arcs of the side plate 1a, 1b, and placing concrete 4 in the inside thereof. Accordingly, necessity for particular material and work technique is eliminated, a cost of manufacture can be reduced. By making a size enlargeable of the reinforced beam P, sufficient strength usable even in a hydraulic pipe line of large bore with a high fluid pressure is obtained.
TANIGAWA MASAYUKI
NAKAMOTO MIKIO
