Example 26.4. A reinforced concrete pile weighing 30 kN (inclusive of helmet and dolly) is driven by a drop hammer weighing 40 kN and having an effective fall of 0.8 m. The average set per blow is 1.4 cm. The total temporary elastic compression is 1.8 cm. Assuming the co-efficient of restitution as 0.25 and a factor of safety of 2, determine the ultimate bearing capacity and the allowable load for the pile

Example 26.4. A reinforced concrete pile weighing 30 kN (inclusive of helmet and dolly) is driven by a drop hammer weighing 40 kN and having an effective fall of 0.8 m. The average set per blow is 1.4 cm. The total temporary elastic compression is 1.8 cm. Assuming the co-efficient of restitution as 0.25 and a factor of safety of 2, determine the ultimate bearing capacity and the allowable load for the pile

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Note: If your answer other than given options please leave it question.
The wooden pile shown in the figure has a diameter of 100 mm and is subjected to a load of P = 70 kN. Along the length of the pile and around its perimeter, soil supplies a constant frictional resistance of w = 4.99 kN/m. The length of the pile is L = 4.2 m and its elastic modulus is E = 8.7 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.
Q- A pile of 0.50 m diameter and of length 10 m is embedded in a deposit of clay. The undrained strength parameters of the clay are cohesion = 60 kN/m² and the angle of internal friction = 0. Find the skin friction capacity (kN) of the pile for an adhesion factor of 0.6.
7. If a 45 cm diameter pipe pile is driven into clayey soil to a depth of 12 m. (a) what would the allowable load capacity (Q) be? The water table is 2 m below the ground surface and the soil profile consists of two clay layers (refer to the figure below). Use the ß method to calculate skin friction and the R=30° for all clay layers. (b) Explain how you selected FS value you use. 12 m ▶ 9m 2m 45 cm Y = 18.5kN/m³ = 30kN/m² Ysat = 19kN/m³ C₂ = 30kN/m² Ysat = 20kN/m² S = 60kN/m²
Please solve problem 3
A 20-m-long concrete pile is shown in Figure P9.1. Estimate the ultimate point load Q, by a. Meyerhof's method b. Vesic's method c. Coyle and Castello's method Use m = 600 in Eq. (9.26). 9.1 Concrete pile 460 mm x 460 mm Loose sand di = 30° y = 18.6 kN/m3 20 m Dense sand d'2 = 42° y = 18.5 kN/m3 Figure P9.1
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
7. A 12m long concrete pile with diameter = 0.45m is drilled into normally consolidated clay with S, = 90 kPa and friction angle = 32 degrees. The pile is loaded with 300 kN and in response to such loading, it settles 2.5mm. What is the mobilized short term end bearing resistance? Show your work and circle your answer.
Q.19 A single pile, 60 cm in diameter and 15 m long, is driven in clay having an average unconfined compressive strength of 120 kN/m². The ultimate load carrying capacity of the pile, assume shear mobilization factor 0.75 around the pile.
Q- A precast concrete pile is driven with a 50 KN hammer falling through a height of 1.0 m with an efficiency of 0.6. The set value observed is 4 mm per blow and the combined temporary compression of the pile, cushion and the ground is 6 mm. As per Modified Hiley Formula, find the ultimate resistance of the pile.
A prestressed concrete pile, 484 mm in diameter, is to be driven in a clayey soil. The pile has a design capacity of 446 kN. Use FS = 2, unconfined compressive strength = 171 kPa. Compute the length (in m.) of the pile if the frictional constant is 0.8. Round off to two decimal places.