Efficiency Factor for Group of Piles Calculator

✖Average Peripheral Friction Stress of Block is the average stress exerted due to friction along the perimeter of a soil or rock block when it is in contact with another material.ⓘ Average Peripheral Friction Stress of Block [f_s]			+10% -10%
✖Thickness of Dam is the vertical dimension of the dam structure, measured perpendicular to the base.ⓘ Thickness of Dam [b]			+10% -10%
✖Length of Soil Section is the vertical or horizontal extent of soil being analyzed or considered within a specific context.ⓘ Length of Soil Section [L]			+10% -10%
✖Width of Soil Section is the measurement or extent of something from side to side.ⓘ Width of Soil Section [w]			+10% -10%
✖Width of Group is the total width of the pile group.ⓘ Width of Group [W_g]			+10% -10%
✖The Number of Piles refers to the quantity of structural elements (piles) driven into or cast in the ground to support a foundation.ⓘ Number of Piles [n]			+10% -10%
✖Single Pile Capacity is the maximum load-carrying capacity that an individual pile can support without causing failure or excessive settlement of the structure it supports.ⓘ Single Pile Capacity [Q_u]			+10% -10%

✖Efficiency Factor is the ratio of ultimate group capacity to the sum of the ultimate capacity of each pile in group.ⓘ Efficiency Factor for Group of Piles [E_g]

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Efficiency Factor for Group of Piles Solution

STEP 0: Pre-Calculation Summary

Formula Used

Efficiency Factor = ((2*Average Peripheral Friction Stress of Block*(Thickness of Dam*Length of Soil Section+Width of Soil Section*Length of Soil Section))+(Thickness of Dam*Width of Group))/(Number of Piles*Single Pile Capacity)
E_g = ((2*f_s*(b*L+w*L))+(b*W_g))/(n*Q_u)
This formula uses 8 Variables

Variables Used

Efficiency Factor - Efficiency Factor is the ratio of ultimate group capacity to the sum of the ultimate capacity of each pile in group.
Average Peripheral Friction Stress of Block - (Measured in Pascal) - Average Peripheral Friction Stress of Block is the average stress exerted due to friction along the perimeter of a soil or rock block when it is in contact with another material.
Thickness of Dam - (Measured in Meter) - Thickness of Dam is the vertical dimension of the dam structure, measured perpendicular to the base.
Length of Soil Section - (Measured in Meter) - Length of Soil Section is the vertical or horizontal extent of soil being analyzed or considered within a specific context.
Width of Soil Section - (Measured in Meter) - Width of Soil Section is the measurement or extent of something from side to side.
Width of Group - (Measured in Meter) - Width of Group is the total width of the pile group.
Number of Piles - The Number of Piles refers to the quantity of structural elements (piles) driven into or cast in the ground to support a foundation.
Single Pile Capacity - Single Pile Capacity is the maximum load-carrying capacity that an individual pile can support without causing failure or excessive settlement of the structure it supports.

STEP 1: Convert Input(s) to Base Unit

Average Peripheral Friction Stress of Block: 15 Newton per Square Meter --> 15 Pascal (Check conversion here)
Thickness of Dam: 2.2 Meter --> 2.2 Meter No Conversion Required
Length of Soil Section: 0.52 Meter --> 0.52 Meter No Conversion Required
Width of Soil Section: 2.921 Meter --> 2.921 Meter No Conversion Required
Width of Group: 8 Meter --> 8 Meter No Conversion Required
Number of Piles: 6 --> No Conversion Required
Single Pile Capacity: 9.45 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

E_g = ((2*f_s*(b*L+w*L))+(b*W_g))/(n*Q_u) --> ((2*15*(2.2*0.52+2.921*0.52))+(2.2*8))/(6*9.45)

Evaluating ... ...

E_g = 1.71935802469136

STEP 3: Convert Result to Output's Unit

1.71935802469136 --> No Conversion Required

FINAL ANSWER

1.71935802469136 ≈ 1.719358 <-- Efficiency Factor

(Calculation completed in 00.007 seconds)

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Home » Engineering » Civil » Geotechnical Engineering » Pile Foundations » Group of Piles » Efficiency Factor for Group of Piles

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Created by Mridul Sharma

Indian Institute of Information Technology (IIIT), Bhopal

Mridul Sharma has created this Calculator and 200+ more calculators!

Verified by Rudrani Tidke

Cummins College of Engineering for Women (CCEW), Pune

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< Group of Piles Calculators

Efficiency Factor for Group of Piles

LaTeX Go Efficiency Factor = ((2*Average Peripheral Friction Stress of Block*(Thickness of Dam*Length of Soil Section+Width of Soil Section*Length of Soil Section))+(Thickness of Dam*Width of Group))/(Number of Piles*Single Pile Capacity)

Socket Length given Allowable Design Load on Rock Socket

LaTeX Go Socket Length = (Allowable Design Load on Rock Socket-((pi*(Socket Diameter^2)*Allowable Bearing Pressure on Rock)/4))/(pi*Socket Diameter*Allowable Concrete-Rock Bond Stress)

Allowable Design Load on Rock Socket

LaTeX Go Allowable Design Load on Rock Socket = (pi*Socket Diameter*Socket Length*Allowable Concrete-Rock Bond Stress)+((pi*(Socket Diameter^2)*Allowable Bearing Pressure on Rock)/4)

Group Drag Load in Pile Group Analysis

LaTeX Go Group Drag Load = Area of Fill*Unit Weight of Fill*Thickness of Fill+Circumference of Group in Foundation*Thickness of Consolidating Soil Layers*Undrained Shear Strength of Soil

Efficiency Factor for Group of Piles Formula

LaTeX Go

What is Average Peripheral Friction Stress of Block?

Average peripheral friction stress of block is the average of the friction stress at the peripheral of the block.

How to Calculate Efficiency Factor for Group of Piles?

Efficiency Factor for Group of Piles calculator uses Efficiency Factor = ((2*Average Peripheral Friction Stress of Block*(Thickness of Dam*Length of Soil Section+Width of Soil Section*Length of Soil Section))+(Thickness of Dam*Width of Group))/(Number of Piles*Single Pile Capacity) to calculate the Efficiency Factor, The Efficiency Factor for Group of Piles formula is defined as the ratio of the actual load capacity of the pile group to the sum of the individual capacities of the piles if they were to act independently. Efficiency Factor is denoted by E_g symbol.

How to calculate Efficiency Factor for Group of Piles using this online calculator? To use this online calculator for Efficiency Factor for Group of Piles, enter Average Peripheral Friction Stress of Block (f_s), Thickness of Dam (b), Length of Soil Section (L), Width of Soil Section (w), Width of Group (W_g), Number of Piles (n) & Single Pile Capacity (Q_u) and hit the calculate button. Here is how the Efficiency Factor for Group of Piles calculation can be explained with given input values -> 1.719358 = ((2*15*(2.2*0.52+2.921*0.52))+(2.2*8))/(6*9.45).

FAQ

What is Efficiency Factor for Group of Piles?

The Efficiency Factor for Group of Piles formula is defined as the ratio of the actual load capacity of the pile group to the sum of the individual capacities of the piles if they were to act independently and is represented as E_g = ((2*f_s*(b*L+w*L))+(b*W_g))/(n*Q_u) or Efficiency Factor = ((2*Average Peripheral Friction Stress of Block*(Thickness of Dam*Length of Soil Section+Width of Soil Section*Length of Soil Section))+(Thickness of Dam*Width of Group))/(Number of Piles*Single Pile Capacity). Average Peripheral Friction Stress of Block is the average stress exerted due to friction along the perimeter of a soil or rock block when it is in contact with another material, Thickness of Dam is the vertical dimension of the dam structure, measured perpendicular to the base, Length of Soil Section is the vertical or horizontal extent of soil being analyzed or considered within a specific context, Width of Soil Section is the measurement or extent of something from side to side, Width of Group is the total width of the pile group, The Number of Piles refers to the quantity of structural elements (piles) driven into or cast in the ground to support a foundation & Single Pile Capacity is the maximum load-carrying capacity that an individual pile can support without causing failure or excessive settlement of the structure it supports.

How to calculate Efficiency Factor for Group of Piles?

The Efficiency Factor for Group of Piles formula is defined as the ratio of the actual load capacity of the pile group to the sum of the individual capacities of the piles if they were to act independently is calculated using Efficiency Factor = ((2*Average Peripheral Friction Stress of Block*(Thickness of Dam*Length of Soil Section+Width of Soil Section*Length of Soil Section))+(Thickness of Dam*Width of Group))/(Number of Piles*Single Pile Capacity). To calculate Efficiency Factor for Group of Piles, you need Average Peripheral Friction Stress of Block (f_s), Thickness of Dam (b), Length of Soil Section (L), Width of Soil Section (w), Width of Group (W_g), Number of Piles (n) & Single Pile Capacity (Q_u). With our tool, you need to enter the respective value for Average Peripheral Friction Stress of Block, Thickness of Dam, Length of Soil Section, Width of Soil Section, Width of Group, Number of Piles & Single Pile Capacity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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