Culvert is an open/close drain structure that allows water to flow below a road. It’s like a tunnel carrying a stream of water flow. A Ring/Pipe Culvert Procedure for construction of a common Ring/Pipe Culvert (road junction culvert) includes; I. Marking Of Alignment: - The surveyor marked out the alignment for the trench to be dug. II. Digging/Excavation: The surveyor marked out the dept of the culvert to be excavated with an excavating machine. For a 1m pipe culvert, the mathematical process of obtaining the required dept is to sum together the total width of the pipe + base + blinding. For dept: A pipe of width 1000 mm, base of 150 mm and blinding of 50 mm (though optional). . Hence 1000mm + 150mm + 50mm = 1200mm (1.2 m) So an excavation of 1200mm (1.2m) is required from the to level of the natural ground (sub grade level) surface. For wid...
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