Cross drainage work, Civil Engineering

Cross Drainage Work:

Several natural streams, rivers and canals cross the road. They have to be led across the road through culverts and bridges. That given structures is known as cross-drainage works. The subject is dealt with in addionally.

Side Drains

Side drains are needed for collecting the surface run-off and leading it to a natural stream. In hill roads, the side drains are generally V-shaped and are lined with dry stones, as in Figure(a). A trapezoidal drain in masonry is shown in Figure(b).

2483_Cross Drainage Work.png

(a) Triangle Drain

485_Cross Drainage Work1.png

(b) Trapezoidal Side Drain

Figure : Typical Designs of Side Drains on Hill Roads

In roads in plains, the run-off water from the road embankment is led to a side ditch which may be lined or unlined. A typical arrangement is shown in Figure. The dimensions of the drain are determined from the run-off, the longitudinal slope and rugosity coefficient using Manning's formula.

982_Cross Drainage Work2.png

Figure: Side Ditches along Roads in Plain Areas

Posted Date: 1/22/2013 5:26:11 AM | Location : United States







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