To provide a propping-up member between wall faces of both of opposing side wall parts on the downstream side of a guide channel in a water way to give the force for pressing against the wall faces by the propping-up force.
A plurality of sheathing boards 3 are piled up between the guide channels 2 and 2 in the vertical direction formed by opposing to both of concrete side wall parts 1, 1 in the water way, respectively, by inserting both of their end parts. The propping-up members 5 are supported between the wall faces of the side wall parts 1 on the downstream sides of both of the guide channels 2 in the water way by a plurality of supporting members 8, respectively, in advance on each sheathing board 3. When each propping-up member 5 is elongated and installed between the wall faces of the side wall parts 1 of both of the guide channels 2, 2, the force for pressing in the direction of width of the water way is given to the concrete in the side wall parts 1 of both of the guide channels 2. Consequently, since the rigidity of the concrete in the side wall parts at opening fringes of the guide channels 2 is increased and the strength of a door stop part 9 in the guide channel 2 is improved, the door stop part 9 in the guide channel 2 is reinforced.
INAMI HIDEJI
AOKI KAZUHIRO
JP HYTEC KK
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro
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