Question

A 15m long pile is driven into sand as shown in the figure. What would be the skin resistance (Qs) of the pile? Hint: Use the Brom's method given (L' 15D). Diameter 0.3 m 2-ΣΡΔL ) 350 y 20 kN/m3 f= σ,' tan δ K 1.4x (1-sinø) S 0.8 '350 Ys22 kN/m3 Unit frictional resistance, Ko MAX AL T Depth (b) (a) Unit frictional resistance for piles in sand Figure 11.18 Selected Answer: 3 b. 242.4 kN a. 228.4 kN Answers: b, 242.4 kN c. 300.2 kN 258 6 kN

Answer 1

Given 0 3m Efech ve Longet L-150 1-5m 35 3m Y=20ke 203)- 60 roS 15 (03) Caiy 2 9013) /22-95) 45 m 15) Note E tective up L.5m 35 KN Shes anies Y 22k af ton .5m-E ffechue SHOS Vanices Grven 78.285 k 1.41-Sinp s2089- (35) K-I4I-Sin 28°) -28 K = 0.743 P-TTD 0.3) = 0.942 10.5m 3m L=1.5m L 12-15 = 20) 20(3) 30 kN 69-143 k aug 3 78.285 k m Noco 5kin Tesistance Q-PALE) fko ans TID K Tan S (A3)0-743) Tan 23 30(3) 69.43(1.5) (to-5 +F8.285 0.372 1016.1375 ons:(e7 phease S 300-2 kN - 378 kN 378 KN. Sin t proccdure Sir Sit T folace d Comec venfhy One 12m