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Drainage basin, U-shaped side gutter and construction method
Drainage basin, U-shaped side gutter and construction method
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机译：流域盆，U形侧沟及施工方法
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摘要
Disclosed is a drainage basin having a function of preventing the settlement of a surrounding structure of a drainage basin or U-shaped side groove, an upper basin and a U-shaped side groove, and a construction method using them. A drainage gutter (1) comprising a main body (10) and a cylindrical upper gutter (20) stacked on the gutter main body (10), wherein the upper gutter (20) The upper surface (21a) of the overhanging support portion (21) is inclined so as to become lower toward the outer peripheral edge (21b), The outer peripheral edge (21b) is located outside the side wall outer surface (11a) of the bag main body (10) over the entire periphery. [Selection] Figure 1
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