Overall Pore Pressure Coefficient Calculator

✖Change in Pore Pressure means difference between final pore pressure and initial pore pressure.ⓘ Change in Pore Pressure [Δu]			+10% -10%
✖Change in Normal Stress means difference between final stress and initial stress.ⓘ Change in Normal Stress [Δσ₁]			+10% -10%

✖Pore Pressure Coefficient Overall is ratio of pore pressure to normal stress.ⓘ Overall Pore Pressure Coefficient [B]

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Formula

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Overall Pore Pressure Coefficient

Formula

`"B" = "Δu"/"Δσ"_{"1"}`

Example

`"0.5"="3Pa"/"6Pa"`

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Download Slope Stability Analysis using Bishops Method Formulas PDF

Overall Pore Pressure Coefficient Solution

STEP 0: Pre-Calculation Summary

Formula Used

Pore Pressure Coefficient Overall = Change in Pore Pressure/Change in Normal Stress
B = Δu/Δσ₁
This formula uses 3 Variables

Variables Used

Pore Pressure Coefficient Overall - Pore Pressure Coefficient Overall is ratio of pore pressure to normal stress.
Change in Pore Pressure - (Measured in Pascal) - Change in Pore Pressure means difference between final pore pressure and initial pore pressure.
Change in Normal Stress - (Measured in Pascal) - Change in Normal Stress means difference between final stress and initial stress.

STEP 1: Convert Input(s) to Base Unit

Change in Pore Pressure: 3 Pascal --> 3 Pascal No Conversion Required
Change in Normal Stress: 6 Pascal --> 6 Pascal No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

B = Δu/Δσ₁ --> 3/6

Evaluating ... ...

B = 0.5

STEP 3: Convert Result to Output's Unit

0.5 --> No Conversion Required

FINAL ANSWER

0.5 <-- Pore Pressure Coefficient Overall

(Calculation completed in 00.004 seconds)

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Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

Suraj Kumar has created this Calculator and 2200+ more calculators!

Verified by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

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< 25 Slope Stability Analysis using Bishops Method Calculators

Weight of Slice given Total Normal Force Acting on Slice

Go Weight of Slice = (Total Normal Force in Soil Mechanics*cos((Angle of Base*pi)/180))+(Shear Force on Slice in Soil Mechanics*sin((Angle of Base*pi)/180))-Vertical Shear Force+Vertical Shear Force at other Section

Resultant Vertical Shear Force on Section N+1

Go Vertical Shear Force at other Section = Weight of Slice+Vertical Shear Force-(Total Normal Force in Soil Mechanics*cos((Angle of Base*pi)/180))+(Shear Force on Slice in Soil Mechanics*sin((Angle of Base*pi)/180))

Resultant Vertical Shear Force on Section N

Go Vertical Shear Force = (Total Normal Force in Soil Mechanics*cos((Angle of Base*pi)/180))+(Shear Force on Slice in Soil Mechanics*sin((Angle of Base*pi)/180))-Weight of Slice+Vertical Shear Force at other Section

Effective Cohesion of Soil given Shear Force in Bishop's Analysis

Go Effective Cohesion = ((Shear Force on Slice in Soil Mechanics*Factor of Safety)-((Total Normal Force-(Upward Force*Length of Arc))*tan((Effective Angle of Internal Friction*pi)/180)))/Length of Arc

Factor of Safety given Shear Force in Bishop's Analysis

Go Factor of Safety = ((Effective Cohesion*Length of Arc)+(Total Normal Force-(Upward Force*Length of Arc))*tan((Effective Angle of Internal Friction*pi)/180))/Shear Force on Slice in Soil Mechanics

Effective Angle of Internal Friction given Shear Force in Bishop's Analysis

Go Effective Angle of Internal Friction = atan(((Shear Force on Slice in Soil Mechanics*Factor of Safety)-(Effective Cohesion*Length of Arc))/(Total Normal Force-(Upward Force*Length of Arc)))

Effective Cohesion of Soil given Normal Stress on Slice

Go Effective Cohesion = Shear Strength of Soil in Pascal-((Normal Stress in Pascal-Upward Force)*tan((Effective Angle of Internal Friction*pi)/180))

Normal Stress on Slice given Shear Strength

Go Normal Stress in Pascal = ((Shear Strength of Soil in Pascal-Cohesion in Soil)/tan((Effective Angle of Internal Friction*pi)/180))+Upward Force

Effective Angle of Internal Friction given Shear Strength

Go Effective Angle of Internal Friction = atan((Shear Strength-Effective Cohesion)/(Normal Stress in Mega Pascal-Upward Force))

Radius of Arc when Total Shear Force on Slice is Available

Go Radius of Soil Section = (Total Weight of Slice in Soil Mechanics*Horizontal Distance)/Total Shear Force in Soil Mechanics

Total Weight of Slice given Total Shear Force on Slice

Go Total Weight of Slice in Soil Mechanics = (Total Shear Force in Soil Mechanics*Radius of Soil Section)/Horizontal Distance

Horizontal Distance of Slice from Centre of Rotation

Go Horizontal Distance = (Total Shear Force in Soil Mechanics*Radius of Soil Section)/Total Weight of Slice in Soil Mechanics

Factor of Safety given by Bishop

Go Factor of Safety = Stability Coefficient m in Soil Mechanics-(Stability Coefficient n*Pore Pressure Ratio)

Pore Pressure Ratio given Horizontal Width

Go Pore Pressure Ratio = (Upward Force*Width of Soil Section)/Total Weight of Slice in Soil Mechanics

Unit weight of Soil given Pore Pressure Ratio

Go Unit Weight of Soil = (Upward Force in Seepage Analysis/(Pore Pressure Ratio*Height of Slice))

Height of Slice given Pore Pressure Ratio

Go Height of Slice = (Upward Force in Seepage Analysis/(Pore Pressure Ratio*Unit Weight of Soil))

Pore Pressure Ratio given Unit Weight

Go Pore Pressure Ratio = (Upward Force in Seepage Analysis/(Unit Weight of Soil*Height of Slice))

Length of Arc of Slice given Effective Stress

Go Length of Arc = Total Normal Force/(Effective Normal Stress+Total Pore Pressure)

Pore Pressure given Effective Stress on Slice

Go Total Pore Pressure = (Total Normal Force/Length of Arc)-Effective Normal Stress

Effective Stress on Slice

Go Effective Normal Stress = (Total Normal Force/Length of Arc)-Total Pore Pressure

Length of Arc of Slice given Shear Force in Bishop's Analysis

Go Length of Arc = Shear Force on Slice in Soil Mechanics/Shear Stress of Soil in Pascal

Change in Pore Pressure given Overall Pore Pressure Coefficient

Go Change in Pore Pressure = Change in Normal Stress*Pore Pressure Coefficient Overall

Change in Normal Stress given Overall Pore Pressure Coefficient

Go Change in Normal Stress = Change in Pore Pressure/Pore Pressure Coefficient Overall

Normal Stress on Slice

Go Normal Stress in Pascal = Total Normal Force/Length of Arc

Length of Arc of Slice

Go Length of Arc = Total Normal Force/Normal Stress in Pascal

Overall Pore Pressure Coefficient Formula

Pore Pressure Coefficient Overall = Change in Pore Pressure/Change in Normal Stress
B = Δu/Δσ₁

What is Pore Water pressure Coefficient?

Pore water pressures are important factors in determining soil strength. Dimensionless coefficients called 'Pore pressure coefficients' or 'Skempton's Pore Pressure Parameters A and B' characterize the change in pore water pressure caused by a change in applied stress

How to Calculate Overall Pore Pressure Coefficient?

Overall Pore Pressure Coefficient calculator uses Pore Pressure Coefficient Overall = Change in Pore Pressure/Change in Normal Stress to calculate the Pore Pressure Coefficient Overall, The Overall Pore Pressure Coefficient is defined as the pressure coefficient of the fluid in the pore space that may influence Bishop's method of slope stability. Pore Pressure Coefficient Overall is denoted by B symbol.

How to calculate Overall Pore Pressure Coefficient using this online calculator? To use this online calculator for Overall Pore Pressure Coefficient, enter Change in Pore Pressure (Δu) & Change in Normal Stress (Δσ₁) and hit the calculate button. Here is how the Overall Pore Pressure Coefficient calculation can be explained with given input values -> 0.5 = 3/6.

FAQ

What is Overall Pore Pressure Coefficient?

The Overall Pore Pressure Coefficient is defined as the pressure coefficient of the fluid in the pore space that may influence Bishop's method of slope stability and is represented as B = Δu/Δσ₁ or Pore Pressure Coefficient Overall = Change in Pore Pressure/Change in Normal Stress. Change in Pore Pressure means difference between final pore pressure and initial pore pressure & Change in Normal Stress means difference between final stress and initial stress.

How to calculate Overall Pore Pressure Coefficient?

The Overall Pore Pressure Coefficient is defined as the pressure coefficient of the fluid in the pore space that may influence Bishop's method of slope stability is calculated using Pore Pressure Coefficient Overall = Change in Pore Pressure/Change in Normal Stress. To calculate Overall Pore Pressure Coefficient, you need Change in Pore Pressure (Δu) & Change in Normal Stress (Δσ₁). With our tool, you need to enter the respective value for Change in Pore Pressure & Change in Normal Stress 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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