Underground Pipe Stress Check

Design Calculation Project No. Project Title: Checked By: Date: Jul/19/22 Date: PIPE STRESSES - WHEELS ON RIGID PAVEMENT Earth Loading Pipe Size = 42 in. Conc. Thick. hc = 8 in. O.D. = 42 in. wd = Cd w Bd^2 = 1316.6 lb / lin ft. where: w = 120 lb/ft^3 soil unit wt. Bd = 5 ft. (actual width) Bd = 5.0 ft. (effective width) Bc = O.D. = 3.50 ft Cd = 1 - e^ (-2 ku'(H/Bd)) 2 ku' = 0.439 H = 2.33 ft. ku' = 0.13 lb / in^3 ku' = modulus of subgrade reaction Saturated clay = 0.110 Ordinary clay = 0.130 Saturated topsoil = 0.150 Sand and gravel = 0.165 Bd max. = Transitional trench width from table below Ref. 1 = 5 ft. Table 13 to 28 Bd = Max. effective transitional trench width Bd Pipe Cover = H ( ft. ) Pipe Dia. 5 6 7 8 9 10 15 20 6 1.42 1.5 1.58 1.67 1.75 1.75 2.08 2.33 8 1.75 1.83 1.92 2 2 2.08 2.42 2.75 12 2.5 2.58 2.75 2.83 2.92 3 3.33 3.67 16 3 3.08 3.17 3.25 3.33 3.42 3.83 4.25 18 3.42 3.5 3.58 3.75 3.83 3.92 4.33 4.75 24 4.25 4.33 4.5 4.58 4.67 4.83 5.25 5.67 30 4.83 5.17 5.33 5.42 5.58 5.67 6.17 6.67 36 5.42 5.75 6.17 6.25 6.42 6.58 7.08 7.58 42 5.92 6.33 6.67 7.08 7.25 7.42 7.92 8.42 48 6.5 6.92 7.25 7.67 8.08 8.17 8.83 9.33 54 7.08 7.42 7.83 8.17 8.58 9 9.67 10.25 60 7.67 8 8.42 8.75 9.08 9.5 10.5 11.08 For shallow depths (< 4ft.) use : wd = H Bc w = 978.6 lb / lin ft. Therefore wd = 978.6 lb / lin + wt. of concrete 350 lb / lin. Ft. wd total = 1328.6 lb / lin ft. N:\civil\spreadsh\UGPipes\u-g pipe.xls (1 of 3) Wheel Loading From Individual Wheel Loads Tire Pressure = 80 psi. Impact Factor = Fi = 1.267 1.5 at surface Ref. 2 , 4.7.2.2.2 Underground Pipe Stress Check - UGP 2 Bc Bd H P X

Underground Pipe Stress Check

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