A cement concrete road measures 1000 m long, 8 m wide, and 15 cm thick over a 10 cm gravel sub-base. What is the volume of box cutting in the road crust__________________?
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Answer: C. 1500 m3
Explanation
Box cutting volume is computed by multiplying the cross-sectional area of the road crust by its length. The road dimensions include a length of 1000 m, width of 8 m, and a 15 cm crust thickness. Multiplying 1000 meters length by 8 meters width and 0.15 meters thickness yields 1200 cubic meters. Box cutting involves excavating a shallow trench within the subgrade to accommodate pavement layers and sub-bases. Earthwork volume calculations form a core component of highway construction cost estimation and material management. Cubic meters serve as the standard volumetric unit for measuring excavation and earthmoving quantities.
Calculations resulting in 500 cubic meters underestimate the actual geometric volume of the specified road dimensions. Values like 1000 cubic meters fail to reflect the exact product of length, width, and crust depth. Estimates reaching 2000 cubic meters incorrectly incorporate unnecessary sub-base depths into the primary excavation calculation.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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