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Net Pressure Intensity Formula

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Net Pressure is the pressure exerted by the overlying soil or rock mass, minus the pore water pressure within the groundwater system. Check FAQs
qn=qg-σs
qn - Net Pressure?qg - Gross Pressure?σs - Effective Surcharge in Kilo Pascal?

Net Pressure Intensity Example

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With units
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Here is how the Net Pressure Intensity equation looks like with Values.

Here is how the Net Pressure Intensity equation looks like with Units.

Here is how the Net Pressure Intensity equation looks like.

60.45Edit=60.9Edit-0.45Edit
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HomeIcon Home » Category Engineering » Category Civil » Category Geotechnical Engineering » fx Net Pressure Intensity

Net Pressure Intensity Solution

Follow our step by step solution on how to calculate Net Pressure Intensity?

FIRST Step Consider the formula
qn=qg-σs
Next Step Substitute values of Variables
∴ qn=60.9kN/m²-0.45kN/m²
Next Step Convert Units
∴ qn=60900Pa-450Pa
Next Step Prepare to Evaluate
∴ qn=60900-450
Next Step Evaluate
∴qn=60450Pa
LAST Step Convert to Output's Unit
∴qn=60.45kN/m²

Net Pressure Intensity Formula Elements

Variables
Net Pressure
Net Pressure is the pressure exerted by the overlying soil or rock mass, minus the pore water pressure within the groundwater system.
Symbol: qn
Measurement: PressureUnit: kN/m²
Note: Value should be greater than 0.
Formulas to find Net PressureOpen Variable
Gross Pressure
Gross Pressure is the total pressure at the base of the footing due to the weight of the superstructure and earth fill if any.
Symbol: qg
Measurement: PressureUnit: kN/m²
Note: Value should be greater than 0.
Formulas to find Gross PressureOpen Variable
Effective Surcharge in Kilo Pascal
Effective Surcharge in Kilo Pascal also called as surcharge load refers to the vertical pressure or any load that acts over the ground surface additional to basic earth pressure.
Symbol: σs
Measurement: PressureUnit: kN/m²
Note: Value should be greater than 0.
Formulas to find Effective Surcharge in Kilo PascalOpen Variable

Other formulas in Bearing Capacity of Soils category

​Go Ultimate Bearing Capacity of Soil under Long Footing at Surface of Soil
qf=((Ctan(Φi))+(0.5⋅γd⋅B⋅KP)⋅(KP⋅exp(π⋅tan(Φi))-1))
​Go Effective Surcharge given Depth of Footing
σs=γ⋅D
​Go Ultimate Bearing Capacity
qf=qnet+σs
​Go Net Ultimate Bearing Capacity given Ultimate Bearing Capacity
qnet=qf-σs

How to Evaluate Net Pressure Intensity?

Net Pressure Intensity evaluator uses Net Pressure = Gross Pressure-Effective Surcharge in Kilo Pascal to evaluate the Net Pressure, The Net Pressure Intensity formula is defined as the difference between the pressure in the aquifer and the pressure in a well or piezometer that is open to that aquifer. Net Pressure is denoted by qn symbol.

How to evaluate Net Pressure Intensity using this online evaluator? To use this online evaluator for Net Pressure Intensity, enter Gross Pressure (qg) & Effective Surcharge in Kilo Pascal (σs) and hit the calculate button.

FAQs on Net Pressure Intensity

What is the formula to find Net Pressure Intensity?
The formula of Net Pressure Intensity is expressed as Net Pressure = Gross Pressure-Effective Surcharge in Kilo Pascal. Here is an example- 0.06045 = 60900-450.
How to calculate Net Pressure Intensity?
With Gross Pressure (qg) & Effective Surcharge in Kilo Pascal (σs) we can find Net Pressure Intensity using the formula - Net Pressure = Gross Pressure-Effective Surcharge in Kilo Pascal.
Can the Net Pressure Intensity be negative?
No, the Net Pressure Intensity, measured in Pressure cannot be negative.
Which unit is used to measure Net Pressure Intensity?
Net Pressure Intensity is usually measured using the Kilonewton per Square Meter[kN/m²] for Pressure. Pascal[kN/m²], Kilopascal[kN/m²], Bar[kN/m²] are the few other units in which Net Pressure Intensity can be measured.
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