Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 18, Problem 18.10P
To determine
Find the allowable load that pile can carry.
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Consider a 13.5 m long concrete pile with a diameter of 0.45 m fully embedded
in sand. For the sand, given unit weight, ? = 17.5 kN/m3
; and soil friction angle,
ϕ’ = 36
o
. Estimate the frictional resistance according to Coyle and Castello’s
method.
The wooden pile shown in the figure has a diameter of 95 mm and is subjected to a load of P = 80 kN. Along the length of the pile and around its perimeter, soil supplies a constant frictional resistance of w = 2.90 kN/m. The length of the pile is L = 5.6 m and its elastic modulus is E = 8.6 GPa.Calculate(a) the force FB needed at the base of the pile for equilibrium.(b) the magnitude of the downward displacement at A relative to B.
The section of a 4 x 4 group pile in a layered saturated clay is shown in Figure P 9.29. The piles are square in cross section (356 mm x 356 mm). The center-to-center spacing (d) of the piles is 1 m. Determine the allowable load bearing capacity of the pile group. Use FS = 3 and Table 9.10.
Chapter 18 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 18 - State whether the following are true or false. a....Ch. 18 - A 1500 kN load was applied on two 20 m long and...Ch. 18 - A 500 mm diameter and 20 m long concrete pile is...Ch. 18 - A 400-mm diameter and 15 m long concrete pile is...Ch. 18 - A 400 mm 400 mm square precast concrete pile of...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.10P
Ch. 18 - Redo Problem 18.10 using the method for...Ch. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.13PCh. 18 - A steel pile (H-section; HP 360 1.491; see Table...Ch. 18 - A concrete pile is 18 m long and has a cross...Ch. 18 - Prob. 18.16PCh. 18 - Prob. 18.17PCh. 18 - Prob. 18.18PCh. 18 - Prob. 18.19PCh. 18 - Figure 18.26a shows a pile. Let L = 20 m, D = 450...Ch. 18 - Refer to Figure 18.26b. Let L = 15.24 m, fill =...Ch. 18 - Prob. 18.22PCh. 18 - Figure 18.39 shows a 3 5 pile group consisting of...Ch. 18 - The section of a 4 4 group pile in a layered...Ch. 18 - Prob. 18.25PCh. 18 - Prob. 18.26CTP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Figure 18.26a shows a pile. Let L = 20 m, D = 450 mm. Hf = 4m, f = 17.5 kN/m3, fill = 25. Determine the total downward drag force on the pile. Assume that the fill is located above the water table and that = 0.5 fill. FIG. 18.26 Negative skin frictionarrow_forwardRefer 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)]arrow_forwardA 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 = 0.2arrow_forward
- A 20 m long concrete pile is shown in Figure P12.2. Estimate the ultimate point load Qp by a. Meyerhofs method b. Vesics method c. Coyle and Castellos method Use m = 600 in Eq. (12.28).arrow_forwardRedo Problem 18.10 using the method for estimating the skin resistance. 18.10 A concrete pile 15 m long with a cross section of 380 mm 380 mm is fully embedded in a saturated clay layer. For the clay, sat = 18 kN/m3, = 0, and cu = 80 kN/m2. Assume that the water table lies below the tip of the pile. Determine the allowable load that the pile can carry (FS = 3). Use the a method to estimate the skin resistance.arrow_forwardDetermine 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.arrow_forward
- Refer to Figure 18.9. A cantilever sheet pile is driven into a granular soil where the water table is 2 m (L1) below the top of the sand. The properties of the sand are =40, =17.5kN/m3, and sat=19kN/m3. It is proposed to excavate to a depth of 6 m (L) below the ground level. Determine the actual depth to which the sheet pile must be driven (L + D), using the net lateral pressure diagram. Note: Dactual=1.3(L3+L4)theoryarrow_forwardThe plan of a group pile is shown in the figure. Assume that the piles areembedded in a saturated homogeneous clay having a cu=90 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. Using FS=3 and table.arrow_forwardA 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.arrow_forward
- Determine the ultimate load capacity of a circular pile with diameter D = 20 cm installed in asaturated soft clay. The pile is embedded 10 m into the ground. According to measurements, thesoil exhibits an undrained shear strength according to the linear relationship: Su = 2+1.6z, wherez is the depth in meters and Su is the undrained shear strength in kPa. The soil's unit weight canbe assumed as 18 kN/m3arrow_forwardConsider a 15 m long concrete pile with a cross section of 0.45 m x 0.45 m fully embedded in sand.For the sand, unit weight, γ = 17 kN/m3 and soil friction angle, ϕ’ = 35o. Estimate the ultimate point??? with each of the following:1.1 Meyerhof’s method (Ans: 1014 kN)1.2 Vesic’s method (Ans: 1754 kN)1.3 Coyle and Castello’s method (Ans: 2479 kN)arrow_forwardA square prestressed concrete pile with a cross section 0.3 m by 0.3 m is driven 15 m into overconsolidated clays with properties as defined: From the ground surface to a depth of 7 m, the unit weight is 17 kN/m3 and the shear strength cohesion cu is 70 kPa; below 7 m, the soil unit weight is 18.5 kN/m3 and cohesion is 105 kPa. Use the total stress α-method to calculate both the design downward axial capacity and upward axial capacity, using a factor of safety of 3 (downward and upward).arrow_forward
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