Question

Please show all steps and work.

Problem 4: (20 points) th For the hydraulic structure shown, a) Calculate the flow rate or seepage loss in m3/day/m around the dam through the permeable layer using k=0.002 cm/s. (6 points) b) Calculate the hydraulic uplift pressure at the base of the dam at point A. (7 points) c) What is the factor of safety against piping? (7 points) The void ratio of the sand is 0.59, Gs = 2.65 sm 10 m 1.67 1 20 m Impermeable layer 10 m Scale

Answer 1

please find the attached file. thank you

Date: 1 a q = KH Nf No (flow per unit length on the coun) K = 0.002 x 10 m/s 4 = 10-0z 10m (differonce blw the wates surface of a d/ ) N = flow channel = 5 Nd = No. of equipotential drop = 12 q=0.002446 ?XfOx 5 m/slm 0.833X104 msim 2 = 7.2 m3/day/m) b) See page total head of a {TA 4-nash] TH=lom, Dh= 1 = 2 NA zno of equipotential drop till A=4 TA = 10 - to y = 20 m TA = hwt ZA hw = 20 -18,33 Pludruulet hu- 11. 66m у ( Китал саt fit ZA=20- (3,34-1,67) ht. of point A abo above datumn - 18.33m.