- 2 Hydraulic Design Of Pipe Culvert By Nomograph Procedure 16 Marks From The Peak Discharge Derived From Your Catchmen 1 (182.42 KiB) Viewed 38 times
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2) Hydraulic Design of pipe culvert by Nomograph procedure (16 marks) From the peak discharge derived from your catchment you are to design hydraulically your culvert crossing. The size of the pipe culvert to be used is either 1500mmo or 1800mmo or 2100mmo. You may use twin or triple culverts if a single culvert is not sufficient to cater for the peak flow. Assuming that the culvert is 100m long, and the slope of the culvert barrel is 1:100. The height of Pavement Level above culvert invert invert level at inlet is 2.70m, and the minimum height of the pavement above the maximum head water, Hvat inlet is 0.3m. It is given that the tail water at the outlet is 1.10m high. a) What are the inlet and outlet invert level of your culvert. [1 mark] b) Determine the maximum Hw at the inlet of your culvert. [1 mark] c) Assuming inlet control, for headwall with socket end inlet type, determine the size and number of pipe culvert required for your peak flow. You need to show at least three iterations for the outcomes of different culvert size and number. The marked Design chart 27.3 is to be submitted in the report. [4 marks] d) Check for outlet control using Hw=H + ho-LS, and to determine if inlet or outlet control governs. Marked Design charts 27.8 and 27.10 are to be submitted in your report. You will need to look up Table 1 for your culvert inlet type. (5 marks] e) Use the Colebrook-white chart to find the full flow and velocity of your culvert and determine if there is a hydraulic jump. The marked Colebrook-White's chart for k=0.60mm is to be submitted in the report. [4 marks) f) What should be done if there is a hydraulic jump at the outlet? [1 marks]