A 0.45m square pile is to be driven at a depth of 10m into the soil. What is the allowable pile capacity? Use FS=3.0 and a Critical Depth of 4m for Loose Sand. GWT is at 3.0m from the Natural Grade Line (NGL). Qu = EQSF + QrQu = Ultimate Load CapacityEQSF = Load carried by friction developed at the side of the PileQr = Load carried at the Pile TipEQs = A,f, (Sand) + A,f; (Clay)• EQSF = Asfs (Sand) + Aşfs (Clay)For Sand LayerFor Clay Layerf, = o'n tana = K,oʻ, tanaf, = aS.on = Effective Horizontal Stressa = Empirical Adhesion Factor%3DSu = Undrained Shear strength at theO = Friction AngleClay LayerFor the Pile Tip, Qr = Ast ftQr = AST ftFor Sand LayerFor Clay Layerf = qNqf; = cNcAST = Area of the TipAST = Area of the Tip%3DNOTE: After the specified critical depth has been reached, effective stress alongthe pile remains constant regardless if it is clay or sand.Qfriction of clay depends on the given a and cQfriction of sand depends on effective stress, Nq, k and tan a NGLCriticalLoose Sand ydry=15kN/m3ysat=17kN/m3Nq=303mGWTDepth=4mØ=28tan a=0.454mK=3.0Hard ClayNc=910mC=200kPaysat=20kN/m3a=0.5Effective Stress

B (size of pile) = 0.45m d (depth of pile) = 10m FOS = 3

A 0.45m square pile is to be driven at a depth of 10m into the soil. What is the allowable pile capacity? Use FS=3.0 and a Critical Depth of 4m for Loose Sand. GWT is at 3.0m from the Natural Grade Line (NGL).

A 0.45m square pile is to be driven at a depth of 10m into the soil. What is the allowable pile capacity? Use FS=3.0 and a Critical Depth of 4m for Loose Sand. GWT is at 3.0m from the Natural Grade Line (NGL).

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: Calculate the pile point bearing capacity using Meyerhof's Method, where a Concrete pile of diameter…

A: The given data is: Diameter of concrete pile=12 in Length of pile=25 ft Unit weight of sand, γ=128…

Q: Assuming a rigid pile, what is the minimum depth of penetration given a shear load of 894 lbs occurs…

A: Shear load(P)=894 lbs Falling height(H)=27 ft diameter of pile(D)=20 in or 1.67 ft Factor of…

Q: Q6) Determine the combined stress in HP 14 x 89 pile shown below. The pile is 25 feet long. E =…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Write a Short note on Statical Analysis (Single Pile Capacity).

A: Static Analytic Method Of Single Pile Capacity

Q: A 14-in.-diameter steel pipe pile is driven 50 ft into overconsolidated clays having the following…

A: The ultimate bearing capacity of the pile is given by,

Q: Example A concrete pile, 30cm-diameter, is driven in to a medium dense sand (y = 21 kN/m³) and p =…

A: Given Factor of safety= 2.5

Q: -- Pile in Sand (friction and end bearing) Make calculations to determine the Allowable Load for a…

A: The objective of the question is to calculate the allowable load for a 14-inch square precast…

Q: 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…

A: Given; Diameter of pile (d) =0.3 m Depth of the pile (l) = 15 m Factor of safety (Fs) = 3

Q: A solid steel pile (E = 200 GPa) with uniform diameter of 100 mm is driven into a soil layer and…

A: The given data is as follows: E=200 GPaDiameter of pile=100 mmVertical force=40 kNFrictional…

Q: Determine the base capacity of a square pile with a 0.4 m width and a 10 m length using Hansen's…

Q: Please round to the nearest Hundredth (i.e., 0.01). No Comma! A circular pile is driven into a…

A: Answer is 19.216 KN But for nearest hundredth answer should be 0.00KN

Q: A closed end precast concrete pile with a diameter (Dp) of 0.5 m is driven into a uniform sand…

A: L1=4To determine the ultimate load-carrying capacity (Qₚ) for a closed-end precast concrete pile…

Q: A 600 mm square prestressed concrete pile is to be driven to a depth of 18 m into the following soil…

A: (i) Skin friction( Qs):QS=QS1+QS2+QS3+QS3for top clayey silt QS1=αCAShere, C =35 KPa and…

Q: Evaluate the resisting capacity against axial load in kN, due to skin friction of a round wooden…

Q: A 50 cm square prestressed concrete pile will be driven 20 m into the soil profile below. (water…

A: Given: A_b = (50 cm)2 / (100 cm/m)2 * pi / 4 = 0.196 m2 c' = 4 kPa (using ϕ= 28 deg) N_c = 14.7 N_q…

Q: Calculate maximum load applying on the pile in the 9-pile group below (P= 4500 kN, M-1000 kN.m) 1.2m…

A: There are nine piles, so each pile will share equal load

Q: A 600 mm square prestressed concrete pile is to be driven to a depth of 20.0 m into the follow- ing…

A: Given:- groundwater table depth = 5m Factor of safety = 3 To find:- ASD allowable downward load

Q: A single pile, 50 cm in diameter and 15 m long is driven in clay having an average unconfined…

A: Pile foundation case-Diameter d=50 cm=0.50 m,Length L=15 m,UCS qu=100 kPa,Shear mobilization factor…

Q: The average values of the undrained shear strength (c,) with depth are given as follows: Depth (m) ,…

A: The length of the pile lies between the 8 m to 12 m. So, cu=80 kN/m2 The empirical adhesion factor…

Q: A single pile, 50 cm in diameter and 16 m long, is driven in clay having an average unconfined…

Q: The average values of the undrained shear strength (c,) with depth are given below. IT Depth (m) C,…

Q: A concrete pile having a diameter of 0.30 m is to be driven into a loose sand having a unit weight…

Q: Assuming a rigid pile, what is the minimum depth of penetration given a shear load of 894 lbs occurs…

A: Data Given: Shear force/Lateral Load = 894 lbse = 27 ftDiameter of the pile = 20 inches = 1.67 ftFOS…

Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

Qu = EQSF + Qr
Qu = Ultimate Load Capacity
EQSF = Load carried by friction developed at the side of the Pile
Qr = Load carried at the Pile Tip
EQs = A,f, (Sand) + A,f; (Clay)
• EQSF = Asfs (Sand) + Aşfs (Clay)
For Sand Layer
For Clay Layer
f, = o'n tana = K,oʻ, tana
f, = aS.
on = Effective Horizontal Stress
a = Empirical Adhesion Factor
%3D
Su = Undrained Shear strength at the
O = Friction Angle
Clay Layer
For the Pile Tip, Qr = Ast ft
Qr = AST ft
For Sand Layer
For Clay Layer
f = qNq
f; = cNc
AST = Area of the Tip
AST = Area of the Tip
%3D
NOTE: After the specified critical depth has been reached, effective stress along
the pile remains constant regardless if it is clay or sand.
Qfriction of clay depends on the given a and c
Qfriction of sand depends on effective stress, Nq, k and tan a

NGL
Critical
Loose Sand ydry=15kN/m3
ysat=17kN/m3
Nq=30
3m
GWT
Depth=4m
Ø=28
tan a=0.45
4m
K=3.0
Hard Clay
Nc=9
10m
C=200kPa
ysat=20kN/m3
a=0.5
Effective Stress

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

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

A 16 in diameter, 75 ft long drilled displacement pile is made of grout with f'c = 5,000 lb/in2. A steel ratio of 0.04 is to be used in the upper 30 ft, and a steel ratio of 0.001 for the remainder of the pile. Compute the modulus of elasticity for the upper and lower portions of this pile.
Please round to the nearest Hundredth (i.e., 0.01). No Comma! A square pile is driven into a homogeneous sand layer. The pile's width (diameter) is 0.5m. The standard penetration resistance near the vicinity of the pile is 21. Calculate the ultimate point force (Qp) of the pile. Use Briaud & Tucker method. Hint: Qp = qp x Ap Qp = kN
A 40 cm diameter concrete pile, is driven to a depth of 15 m in a deep deposit of clay having unconfined compressive strength of 80 kN/m². The design load carrying capacity of pile will be [Assume α = 0.8 and FOS = 3] - (a) 648.42 kN (c) 432.28 KN ;) (b) 216.14 kN (d) 1296.84 kN
-- Pile in Sand (friction and end bearing) Make calculations to determine the Allowable Load for a 14-inch square precast concrete pile that is driven into a dense medium to fine sand deposit with = 36 deg. and y = 125 pcf. The pile is driven to 85 ft. depth, and there is still 40 ft. of sand below the pile tip. Groundwater is 6 ft. below ground surface. You are to assume that a static pile load test will be performed on one representative pile for this project. Use the limiting depth and limiting pressure approaches for end bearing and for side friction. State the K and 8 values you use, and justify.
Please round to the nearest Hundredth (i.e., 0.01). No Comma! A square pile, 13 m long is driven into a homogeneous sand layer. The pile's width (diameter) is 0.5 m. The standard penetration resistance near the vicinity of the pile is 17. Calculate the allowable bearing force (Qa) of the pile. Use FS = 2 and Briaud & Tucker method. Hint: Qa = Qu / FS Qa = KN
ge 4 Please round to the nearest Hundredth (i.e., 0.01). No Comma! A square pile, 26 m long is driven into a homogeneous sand layer. The pile's width (diameter) is 0.2 m. The standard penetration resistance near the vicinity of the pile is 17. Calculate the allowable bearing force (Qa) of the pile. Use FS = 3 and Briaud & Tucker method. Hint: Qa= Qu/FS Qa = kN S D F G H J Finish attempt... K
subject
A square prestressed concrete pile with a 14 inch side is to be driven to the necessary depth. It needs to be able to support 105 kips. It has been determined that the point resistance qp is 120 ksf and the side friction fs is 450 psf. Use formula 12.2 (see attached image) to estimate how long the pile needs to be with a factor of safety of at least 2.5. Round your answer to a multiple of 5 feet. Use L as a variable to calculate the load in formula 12.2. L can be obtained from this equation.