embedded in a saturated homogeneous clay having a c, = 86 kN/m². Given: diameter of piles (D) = 316 mm, center-to-center spacing of piles = 600 mm, and length of piles = 20 m. Find the allowable load-carrying capacity of the pile group. Use FS = 3.

embedded in a saturated homogeneous clay having a c, = 86 kN/m². Given: diameter of piles (D) = 316 mm, center-to-center spacing of piles = 600 mm, and length of piles = 20 m. Find the allowable load-carrying capacity of the pile group. Use FS = 3.

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 12.36P: Figure P12.36 shows a 3 5 pile group consisting of 15 concrete piles of 400 mm diameter and 12 m in...

See similar textbooks

Similar questions

5 A group of 9 piles of 28 cm diameter is arranged in a square configuration with a center-to-center spacing of 1.11 m. The length of the piles is 13 m. Unit cohesion of the clay is 94 kPa. Determine the ultimate group capacity of the pile group based on block failure. Assume adhesion factor of 0.72. Round off to two decimal places.
0.45m Square prestressed concrete piles are to be installed in groups of 4 at the site shown in the figure below. The center-to-center spacing between piles is 2.55 m. - Ground Level Soft Clay Su = 15kPa - Depth =6.7m Silty Clay Su = 30kPa 3m Depth = 15.1m 3m Medium Stiff Clay S,-80kPa - Depth = 20.0m a. Calculate group capacity based on individual failure b. Calculate group capacity based on block failure c. Based on parts (a) and (b) above determine the allowable downward load capacity for the pile group. Assume factor of safety of 2.5.
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
A 20 m long bored concrete pile having a diameter of 350 mm is load tested, and the data are given below: Load (kN) 0 250 500 750 1000 1250 1000 750 500 250 0 Settlement (mm) 0 2.0 5.0 8.2 15.0 39.6 39.5 38.2 37.5 36.1 35.5 Given: Econcrete = 25 x 103 MN/m2 . a. Estimate the allowable pile load using Davisson's (1973) method, with FS=2.5. b. At the maximum load of 1250 kN, what are the total and net settlements?
Figure P12.36 shows a 3 5 pile group consisting of 15 concrete piles of 400 mm diameter and 12 m in length. What would be the maximum load that can be allowed on the mat with a factor of safety of 3? The piles have a center-to-center spacing of 1200 mm.
i need the answer quickly
a group of 9 piles of 29 cm diameter is arranged in a square configuration with a center-to-center spacing of 1.86 m. The length of the piles is 11 m. Unit cohesion of the clay is 86 kPa. Determine the ultimate group capacity of the pile group based on block failure. Assume adhesion factor of 0.7.
Q2: The plan of a group piles is shown below. Assume that the piles are embedded in a saturated homogeneous clay having a 7sa= 19.24 kN/m, C=41.2 kN/m? .Given: diameter of piles (D) = 305 mm, center-to-center spacing of piles 762 mm, and length of piles = 13.7 m. Find the allowable load-carrying capacity of the pile group. Use FS = 3. P
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
A square pile group of 16 piles penetrates through a filled up soil of 3 m depth. The pile diameter is 250 mm and pile spacing is 0.75 m. The unit cohesion of the material is 18 kN/m² and the unit weight of the soil is 15 kN/m². Compute the drag down force on the group.
Square concrete piles are arranged in 5 row by 5 column formation beneath the pile cap. These piles are embedded into several layers of cohesive soil. The first layer is 3.75m deep and the second layer is 4.49m deep. The total depth of the third layer was not fully captured in the geotechnical report and is assumed to extend indefinitely. The piles are 0.60m wide. Each pile span 12.59m in length. The first layer has c = 61 kPa and α = 0.99. The second layer has c = 82 kPa and α = 0.78. The third layer has c = 81 kPa and α = 0.63. The bearing capacity factor Nc is equal to 8.What should be the spacing (m) to get a group efficiency of 111%? Consider ultimate capacities. Please answer this asap. For upvote. Thanks
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?