Net Bearing Capacity for Undrained Loading of Cohesive Soils Solution

STEP 0: Pre-Calculation Summary
Formula Used
Net Bearing Capacity = Alpha Footing Factor*Bearing Capacity Factor Nq*Undrained Shear Strength in Soil
qu = αf*Nq*Cu
This formula uses 4 Variables
Variables Used
Net Bearing Capacity - (Measured in Pascal) - Net Bearing Capacity is the maximum net pressure intensity to which the soil at the base of the foundation can be subjected without risk of shear failure.
Alpha Footing Factor - Alpha Footing Factor is 1.0 for strip footings and 1.3 for circular and square footings.
Bearing Capacity Factor Nq - Bearing Capacity Factor Nq used in a bearing capacity equation that correlates with the angle of internal friction of soil.
Undrained Shear Strength in Soil - (Measured in Pascal) - Undrained Shear Strength in Soil within zone 1 pile diameter above and 2 diameters below pile tip.
STEP 1: Convert Input(s) to Base Unit
Alpha Footing Factor: 1.3 --> No Conversion Required
Bearing Capacity Factor Nq: 1.98 --> No Conversion Required
Undrained Shear Strength in Soil: 0.015 Kilopascal --> 15 Pascal (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
qu = αf*Nq*Cu --> 1.3*1.98*15
Evaluating ... ...
qu = 38.61
STEP 3: Convert Result to Output's Unit
38.61 Pascal -->0.03861 Kilopascal (Check conversion here)
FINAL ANSWER
0.03861 Kilopascal <-- Net Bearing Capacity
(Calculation completed in 00.020 seconds)

Credits

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Indian Institute of Information Technology (IIIT), Bhopal
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11 Foundation Stability Analysis Calculators

Net Bearing Capacity of Long Footing in Foundation Stability Analysis
Go Net Bearing Capacity = (Alpha Footing Factor*Undrained Shear Strength in Soil*Bearing Capacity Factor)+(Effective Vertical Shear Stress in Soil*Bearing Capacity Factor Nq)+(Beta Footing Factor*Unit Weight of Soil*Width of Footing*Value of Nγ)
Maximum Bearing Pressure when Full Bearing Area of Sq and Rect Footings is Engaged
Go Maximum Bearing Pressure = (Axial Load on Soil/Area of Footing)*(1+(Loading Eccentricity 1*Principal Axis 1/(Radius of Gyration 1^2))+(Loading Eccentricity 2*Principal Axis 2/(Radius of Gyration 2^2)))
Maximum Bearing Pressure for Eccentric Loading Conventional Case
Go Maximum Bearing Pressure = (Circumference of Group in Foundation/(Breadth of Dam*Length of Footing))*(1+((6*Eccentricity of the Load on Soil)/Breadth of Dam))
Minimum Bearing Pressure for Eccentric Loading Conventional Case
Go Bearing Pressure Minimum = (Axial Load on Soil/(Breadth of Dam*Length of Footing))*(1-((6*Eccentricity of the Load on Soil)/Breadth of Dam))
Maximum Soil Pressure
Go Maximum Soil Pressure = (2*Axial Load on Soil)/(3*Length of Footing*((Width of Footing/2)-Eccentricity of the Load on Soil))
Correction Factor Nc for Rectangle
Go Correction Factor Nc = 1+(Width of Footing/Length of Footing)*(Bearing Capacity Factor Nq/Bearing Capacity Factor)
Correction Factor for Rectangle
Go Correction Factor Nq = 1+(Width of Footing/Length of Footing)*(tan(Angle of Internal Friction))
Net Bearing Capacity for Undrained Loading of Cohesive Soils
Go Net Bearing Capacity = Alpha Footing Factor*Bearing Capacity Factor Nq*Undrained Shear Strength in Soil
Correction Factor Nc for Circle and Square
Go Correction Factor Nc = 1+(Bearing Capacity Factor Nq/Bearing Capacity Factor)
Correction Factor Ny for Rectangle
Go Correction Factor NY = 1-0.4*(Width of Footing/Length of Footing)
Correction Factor for Circle and Square
Go Correction Factor Nq = 1+tan(Angle of Internal Friction)

Net Bearing Capacity for Undrained Loading of Cohesive Soils Formula

Net Bearing Capacity = Alpha Footing Factor*Bearing Capacity Factor Nq*Undrained Shear Strength in Soil
qu = αf*Nq*Cu

What is the Value of Footing Factor?

The value of footing factor is different for different shapes of footings i.e it is 1.0 for strip footings and 1.3 for circular and square footings.

How to Calculate Net Bearing Capacity for Undrained Loading of Cohesive Soils?

Net Bearing Capacity for Undrained Loading of Cohesive Soils calculator uses Net Bearing Capacity = Alpha Footing Factor*Bearing Capacity Factor Nq*Undrained Shear Strength in Soil to calculate the Net Bearing Capacity, The Net Bearing Capacity for Undrained Loading of Cohesive Soils is defined as the total capacity to bear load for a cohesive soil for undrained loading (Pore pressure is developed but there is no flow of pore fluid). Net Bearing Capacity is denoted by qu symbol.

How to calculate Net Bearing Capacity for Undrained Loading of Cohesive Soils using this online calculator? To use this online calculator for Net Bearing Capacity for Undrained Loading of Cohesive Soils, enter Alpha Footing Factor f), Bearing Capacity Factor Nq (Nq) & Undrained Shear Strength in Soil (Cu) and hit the calculate button. Here is how the Net Bearing Capacity for Undrained Loading of Cohesive Soils calculation can be explained with given input values -> 3.9E-5 = 1.3*1.98*15.

FAQ

What is Net Bearing Capacity for Undrained Loading of Cohesive Soils?
The Net Bearing Capacity for Undrained Loading of Cohesive Soils is defined as the total capacity to bear load for a cohesive soil for undrained loading (Pore pressure is developed but there is no flow of pore fluid) and is represented as qu = αf*Nq*Cu or Net Bearing Capacity = Alpha Footing Factor*Bearing Capacity Factor Nq*Undrained Shear Strength in Soil. Alpha Footing Factor is 1.0 for strip footings and 1.3 for circular and square footings, Bearing Capacity Factor Nq used in a bearing capacity equation that correlates with the angle of internal friction of soil & Undrained Shear Strength in Soil within zone 1 pile diameter above and 2 diameters below pile tip.
How to calculate Net Bearing Capacity for Undrained Loading of Cohesive Soils?
The Net Bearing Capacity for Undrained Loading of Cohesive Soils is defined as the total capacity to bear load for a cohesive soil for undrained loading (Pore pressure is developed but there is no flow of pore fluid) is calculated using Net Bearing Capacity = Alpha Footing Factor*Bearing Capacity Factor Nq*Undrained Shear Strength in Soil. To calculate Net Bearing Capacity for Undrained Loading of Cohesive Soils, you need Alpha Footing Factor f), Bearing Capacity Factor Nq (Nq) & Undrained Shear Strength in Soil (Cu). With our tool, you need to enter the respective value for Alpha Footing Factor, Bearing Capacity Factor Nq & Undrained Shear Strength in Soil and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Net Bearing Capacity?
In this formula, Net Bearing Capacity uses Alpha Footing Factor, Bearing Capacity Factor Nq & Undrained Shear Strength in Soil. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Net Bearing Capacity = (Alpha Footing Factor*Undrained Shear Strength in Soil*Bearing Capacity Factor)+(Effective Vertical Shear Stress in Soil*Bearing Capacity Factor Nq)+(Beta Footing Factor*Unit Weight of Soil*Width of Footing*Value of Nγ)
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