The amount of culvert work? The following Zhongda Consulting brings about the calculation method of culvert engineering quantities. The relevant content is for reference.
C20 concrete: (5.85-0.6)×1.2×29×2=365.4m3
C30 concrete cap: [(1.2-0.25)×0.35+(0.6-0.35) ×1.2]×29×2=36.685m3
Cover plate: 0.35×(4+0.25×2)×29=45.675m3
C30 cement concrete pavement: 3×0.18× 29=15.66m3
Cement-stabilized gravel base: 3×0.15×29=13.05m3
Gravel cushion: 3×0.67×29=58.29m3
Gravel replacement: 8.64×1.5×29=375.84m3
C25 concrete: 1×(8.64-0.87×2)×29=200.1m3
Eight-shaped wall: V=1 /2×0.58×(5.852-0.62)×0.58+0.58/0.6×3.75×(5.853-0.63)=10.85m3
10.85×4=43.4m3
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