A concrete pile having a diameter od 0.30m. Is driven into a loose sand having a unit weight of 20 kN/cu.m Coefficient of friction between sand and pile is 0.40. Bearing capacity factor Nq=80. Lateral pressure factor K =0.90 Allowable load of pule is 170 kN. Fs= 3.25 Determine the following A. Ultimate bearing capacity of file B. Ultimate frictional capacity of pile C. Length of the pile

A concrete pile having a diameter od 0.30m. Is driven into a loose sand having a unit weight of 20 kN/cu.m Coefficient of friction between sand and pile is 0.40. Bearing capacity factor Nq=80. Lateral pressure factor K =0.90 Allowable load of pule is 170 kN. Fs= 3.25 Determine the following A. Ultimate bearing capacity of file B. Ultimate frictional capacity of pile C. Length of the pile

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter12: Pile Foundations

Section: Chapter Questions

Problem 12.12P

See similar textbooks

Similar questions

Evaluate the resisting capacity against axial load due skin friction of a concrete pile embedded into a layer of plastic clay given in the following conditions: Size of pile = 0.4 m square Depth of penetratian inta the clay layer = 40 m Unconfined compression strength (qu) af the clay = 200 KPa Ans. 6400 kN
The section of 4*5 group pipe pile, each 15 m in long, embedded in clay layer, the diameter of pile = 403 mm, the center to center spacing of the piles is 700 mm. The clay layer properties, Cu = 60 kN/m2, saturated unit weight = 18.33 kN/m3 Solve the questions 5 - 8. Find the empirical adhesion factor (a) * 1 0.92 0.82 0.74 0.62 None of the above.
Q2. A concrete pile 400 mm. X 400 mm in cross section is shown in figure below. Calculate the ultimate skin friction resistance by using the a method and Point Bearing Capacity, Q, by using Vesic's Method. Estimate the allowable load-carrying capacity using FS = 4 Silty clay Ysat = 118 lb/ft³ Cu1 Plasticity index, PI = 15 Groundwater "table: . Silty clay Ysat = 122.4 1b/ft³ L Cu2 Plasticity index, PI = 20 300 mm Given Data: DI L Cu2 Cui 4 14 50 62
FDE 016: A prestressed concrete pile, 400 mm x 400 mm in cross-section, is to be driven in a clayey soil as shown. Use alpha method with factor of safety of 2. Soft Clay 17-15.7 kN/m² c=32 kPa 8 m Stiff Clay * = 19 kN/m² Cu = 90 kPa = 0.5 Refer to FDE 016. What is the end bearing capacity of pile in KN? Select the correct response: 251.84 184.25 129.60 245.32 6 m.
A concrete pile having a diameter od 0.30m. Is driven into a loose sand having a unit weight of 20 kN/cu.m Coefficient of friction between sand and pile is 0.40. Bearing capacity factor Nq=80. Lateral pressure factor K =0.90 Allowable load of pule is 170 kN. Fs= 3.25 Dc= 20D for dense compact sand Dc=10D for loose sand Determine the following A. Ultimate bearing capacity of file B. Ultimate frictional capacity of pile C. Length of the pile
A nine pile group consists of 0.30m diameter friction concrete piles 12m long. The piles are driven into clay having an unconfined compressive strength of 180kPa and the unit weight of clay is 18kN/m3. The spacing of piles is 0.75m center to center. Assuming a bearing capacity factor of Nc = 9, a= 1.0. Which of the following most nearly gives the minimum pile spacing in order to achieve 100% efficiency?
PROBLEM 2: A circular pile 0.45m in diameter and 15m long is embedded in a layer of dense sand. The soil has the following properties: Dry unit eight is 18 kN/m3 and saturated unit weight is 21 kN/m³ (water table is 4m below from the ground surface), Nq=85, k=1.25, tan a = 0.45 and FS=2.5 a) Calculate the end bearing capacity b) Calculate the frictional resistance c) Calculate the allowable load
Q1: Determine the allowable load capacity for the driven pile of 0.6 m diameter embedded in a layered soil as shown in the figure below, use F.S 2.0 , K, = 1.5 and tand =0.5? ELEV. 110 N.C.C W.T ELEV. 108 Cu =70 kPa Y = 17 kN/m3 a = 1, yw = 10 kN/m? ELEV. 102 O.C.C, Cu 180 kPa, y = 20 kN/m³ a = 0.45 ELEV. 98 Sandy Layer Yt = 19 kN/m3 Ø = 32° Nq = 23.18 ELEV. 90
A 10m long and 0.8m diameter precast concrete pile is driven into a saturated clay deposit as shown in the figure below. The groundwater table is at the ground surface. For the ratio of the undrained shear strength to vertical effective pressure is approximated as follows: = 0.11 + 0.0037(PI) NC (9- 9 (OCR)8 OC Determine the bearing capacity for the pile by the a) Alpha (a) method. b) Lambda (A) method Depth, m Layer 1 OCR = 5, Yat = 19.5 kN/m³, Pl = 35 Layer 2 OCR = 1.5, %at = 19.0 kN/m, Pl = 25 Layer 3 OCR = 8, %at = 19.5 kN/m, Pl = 20 10 D, = 0.8 m D 10 m
A group of 9 piles, 12 m long and 400 mm in diameter is arranged in a square pattern in homogeneous clay soil. The c/c spacing of the pile are 1000 mm. The properties of clay soil is given below Cc =0.10, e0=0.9, γsat = 20 kN/m^3, unconfined compressive strength qu= 70 kN/m^2 assume adhesion factor 0.7,. Water table is at GL. Determine the FOS against bearing if 1500 kN load is applied on the pile group and total settlement of pile group under the same load
For the pile distribution below, determine the load Pp that the red pile will receive, in Ton. P = 254 Ton, d = 2 m, ex = 0.2 m, ey = 0.3 m, H = 1.3 m. ex, e and positive with the axes. Consider the self-weight of the head. O O O +2/2+0+0+0/2+ d/2
A 0.30 m. x 0.30 m. concrete pile 22 m. long is driven in a clayey soil having an unconfined compressive strength of 110 kN/m². The unit weight of clayey soil is 18 kN/m3. Frictional constant is 0.76 due to skin friction. Assume a factor of safety equal to 2.0 and a bearing capacity factor Nc = 9. Compute the capacity of pile due to skin friction only. %3D