RCC slab culvert (u): four items

Reading of the drawing (dimensions in the scan are hard to read; assumed values are stated)

• Overall length of culvert across the road $5.30$ m (4.00 m roadway plus kerbs). Clear span $1.50$ m.
• Abutment: wall $0.50$ m thick $\times$ $0.90$ m high; C.C. foundation (1:3:6 assumed) $0.80$ m wide $\times$ $0.30$ m thick; excavation to $0.70$ m depth (0.30 m C.C. plus 0.40 m below bed level).
• Slab $0.30$ m thick resting $0.30$ m on each abutment (span $1.50 + 2 \times 0.30 = 2.10$ m). The wearing coat and road metal are not asked.

a) Earthwork in excavation

$V = 2 \times 0.80 \times 5.30 \times 0.70 = 5.936$ m³

b) Cement concrete in foundation

$V = 2 \times 0.80 \times 0.30 \times 5.30 = 2.544$ m³

c) Brickwork

$V = 2 \times 0.50 \times 0.90 \times 5.30 = 4.770$ m³

d) RCC work (slab)

$V = 5.30 \times 2.10 \times 0.30 = 3.339$ m³

Answer: excavation = 5.936 m³; C.C. foundation = 2.544 m³; brickwork = 4.770 m³; RCC slab = 3.339 m³.