2. A 3 X 4 group pile that are square in cross section (356mm 3 356 mm) as shown in the figure. The center-to-center spacing, d, of the piles is 889 mm. If Bg = 2.134 m,Lg = 3.023 m. Assume the piles act as a group (block).Find the ultimate load-bearing capacity of the pile group.G.W.T4.57 m13.72 m889 min3. Consider a 3 X 4 group of concrete piles, each with diameter (D) of 0.356 m in a sandlayer. If Se = 19.69 mm and d/D = 3. Determine the elastic settlement of the group.Clayc. 50.3 kN/m²Y = 17.6 kN/m³Clayc=85.1 kN/m²Y 19.02 kN/m²

Problem 3: Elastic Settlement of the Group Given: Diameter of each pile (D): 0.356 mRatio of spacing…

Answered: 2. A 3 X 4 group pile that are square…

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter9: Pile Foundations

Section: Chapter Questions

Problem 9.17P

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Refer to the pile shown in Figure P9.1. Estimate the side resistance Qs by Using Eqs. (9.40) through (9.42). Use K = 1.5 and Coyle and Castello’s method [Eq. (9.44)]
Determine the maximum load that can be allowed on a 450 mm diameter driven pile shown in Figure P12.6, allowing a factor of safety of 3. Use K = 1.5 Ko and = 0.65 in computing the shaft load. Use Meyerhofs method for computing the point load.
A 600 mm diameter and 25 m long driven concrete pile carries a column load of 1200 kN. It is estimated that the shaft carries 900 kN and the point carries 300 kN. Determine the settlement of the pile head using the Poulos and Davis method with the following data: Es = 25 MN/m2, Ep = 30,000 MN/m2, and s = 0.2
6) A 2-ft x 2-ft square concrete pile is shown. Ignore the resistance of the soft clay. Assume Na 10. For a safety factor of 3.0, the allowable load capacity of the pile is most nearly: a. 344 kips b. 169 kips c. 128 kips d. 225 kips 5 ft 30 ft R SOFT CLAY y=120 pcf SAND Y = 115 pcf =32°
A nine-pile group composed of 0.30 m diameter pipe piles is embedded 15 m in clay soil with conditions indicated by the sketch. 1. Det the total capacity if piles act individually 2. Find the total capacity if piles act as a group 3. Det the design load if factor of safety is 3. C = 42.81 kpa a = 0.85 6m C = 57.46 kpa a = 0.75 6m C = 95.76 kpa a = 0.5 Nc = 8 3m 0.75m 1-8 0.75m 上tt 0.75m 0.75m
P-2 A driven closed-ended pile, circular in cross section, is shown in the Figure. Calculate the following: Layer I Groundwater 3 m táble a. The ultimate point load using Meyerhof's procedure. 3 m Layer II b. The ultimate frictional resistance Qs. [Take K = 1.4 and ô'= 0.6º'] c. The allowable load of the pile (use FS = 3 15 m Layer II d. Calculate the (a), (b) and (c) if the layer III was a Clay soil with C,=80 kPa (use ca-method by Terzaghi and FS = 3) %3D Layer I Y = 15.7 kN/m³ 4' = 32° Layer II = 18.2 kN/m3 Ysat = 19.2 kN/m³ Layer III 381 mm Ysat 4' = 32° c' = 0 = 40° c' = 0 c' = 0
The section of a 3 x 4 group pile in a layered saturated clay is shown in the figure below. The piles are square in cross section (356 mm x 356 mm). The center-to-center spacing, d, of the piles is 889 mm. Determine the allowable load-bearing capacity of the pile group. Use FS = 4. Note that the groundwater table coincides with the ground surface.
P-1 A driven closed-ended pile, circular in cross section, is shown in the Figure. Calculate the following: Layer I Groundwater 3 m táble a. The ultimate point load using Meyerhof's procedure. 3 m Layer II b. The ultimate frictional resistance Qs. [Take K = 1.4 and ô'= 0.64'] c. The allowable load of the pile (use FS = 3 15 m Layer III d. Calculate the (a), (b) and (c) if the layer III was a Clay soil with C,=80 kPa (use a-method by Terzaghi and FS = 3) %3D Layer II = 18.2 kN/m3 Layer I Layer III Y = 15.7 kN/m³ o' = 32° c' = 0 19.2 kN/m3 381 mm Ysat 6' = 32° c' = 0 Ysat 4' = 40° c' = 0 Chabie Ch
Problem 1 Pre-stressed concrete piles are planned for use as the foundation for a waterfront structure. Soil condition is dense sand and no water table below the ground. Properties of soil: y = 19.65 kN/m³ k=3 tan a = 0.45 N₂-80 Consider a single 30 cm square pile driven 9m below the ground with critical depth of 6m. Determine the following: a. Capacity of pile due to skin friction b. Capacity due to end bearing C Design load that the pile could carry if the factor of safety is 3.
13) A cylindrical pile of diameter 0.3 m is driven to a depth of 15 m in to an NC clay as shown in the figure below. Using the factor of safety of 3, the allowable load capacity of the pile using the a-method is most nearly: a. 426 kN b. 178 kN c. 330 kN d. 105 kN 10 m 5 m Gy=25k9x 7-15998 C₂#100 kPa p=0 1*17k9*
A 11-in. square concrete pile is driven into a clay deposit as shown in the figure below. The unit weight of the clay soil is 100 lb/ft³. The embedded length of the pile is 40 ft. Determine the pile's design capacity (kips), using a factor of safety of 2. HINT: from Figure 10-7, with c = 1 kip/ft², a = 0.83. Design = ? 40 ft TKN7. Clay 9. = 2000 lb/ft² →B, square Round your answer to ONE decimal place
1) A precast concrete pile with a cross-section of 350mm x 350mm is embedded in sand. The length of the pile is 15 meters. Assume that ysand= 15.8 kN/m², Øsand= 35°, and the relative density of sand is 70%. Estimate the allowable pullout capacity of the pile (FS=4). X

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