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3M = d 0.7d 1 S= 1000 n = 0·0013 .2 Fr. ?
① 找工 At the point of Construction of the Culvert, the inlet invert elevation = 25.5m; natural Streambed Slope = 0.01; talklater. depth at 10% dependability above out inve# = 1.3m. Culvert length = 50m. Roadklay Shoulder elevation = 29. 6om. If a Free board of 0.5m is to be Provided, design a concrete pipe Culvert for this site checking for both outlet and inlet Control Situations. Indicate the condition of Operation of the culvert for the design Flood by Finding the critical depth and normal depth using the attached charts. Use a groove end with headkld! klith ke=0.2 ; n = 0·015; f = 0.02
100 80 60 50 40 30 20 15 10 8 Discharge (Q) in m³/s 6 5 1.98 m³/s 5 3000 2700 2400 2100 1800 1650 1500 1350 1200 1050 900 825 -750 -675 -600 -525 5 -450 6 0.4 7 8 0.3 -375 9 10 0.2 -300 0.1 HEAD FOR CONCRETE PIPE CULVERTS Adapted from Bureau of Public Roads Jan. 1963. FLOWING FULL n=0.012 232 of entrance. a To compute HW, connect the length scale for the type of. condition and culvert diameter scate with straight line; pivot. turning time and draw a straight line from the design discharge through the turning pievient to the head loss scale, H. Compute the head water as HW = H + ho - LS where L-length of culvert S - slope of culvert. 0.8 0.6 0.5 TURNING LINE Diameter (D) in mm. CHART 5A HW SPE ho Slope So Submerged Outlet Culvert Flowing Full For outlet crown not submerged, compute HW by. methods described in the design procedure H-0.29 m EXAMPLE DE 1200 L-33.5 m k=0.5 LITTTT "e" L Length (L) in m a wwwlul e 0.5 Ke=0.2 Head (H) in m 0.1 0.2 0.3 0.4 0.5 -0.6 -0.7 0.8 0.9 لليل 15
4500 - 4200 - 3900 3600 3300 3000 2700 2400 - 2100 1800 1500 1350 1200 1050 900 825 750 ا ا 1 Diameter of Culvert (D) in mm ا Discharge (Q) in m³/s | 400 300 200 100 80 60 50 · 40 י ןויוןוןייייון ויויויןווווןוןייייווווויויוייויןןייויןווייני ייייןןויין 30 20 10 2 675 600 525 0.1 450 375 300 Adapted from 1963 Bureau of Public Roads Jan 1 0.8 0.6 0.5 0.4 0.3 - 0.2 CHART 1A EXAMPLE D=1050 mm Q=3.40 m/s HW HW D (m) (1) 2.5 2.68 (2) 2.1 2.26 (3) 2.2 2.35 *D in meters EXAMPLE HW D ENTRANCE TYPE Square edge with headwall Groove end with headwall SCALE (1) (2) (3) projecting To use scale (2) or (3) project horizontally to scale (1), then use straight inclined line through D and Q scales, or reverse as illustrated. Headwater Depth in Diameters (HW/D) oove and سلسللاع ستا - هستند (1) (2) (3) 6 م ا 4 2 1.5 ا ا 1.0 0.9 0.8 - 0.7 - 06 0.5 0.5 0.5 HEADWATER DEPTH FOR CONCRETE PIPE CULVERTS WITH INLET CONTROL ' 1.5 ا 1.0 0.9 0.8 0.7 0.6 -1.5 1.0 . N ا . 0.9 0.8 - 07 0.6