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h=depth %3D p pressure Oe= effective stress %3D p= pgh Example: Estimate pressure and effective stress at 8000 ft (2438.281 m) Density of Water = 1000 kg/m Rock Density = 2600 kg/m Acceleration of Gravity = 9.81 m/sec %3D Units Conversion - Pa to psi = 1.450377X10 P rock = (2600)(9.81)(2438.281)(1.450377x10*) = 9020 psi %3D %3D P water = (1000)(9.81)(2438.281)(1.450377x10*) = 3469 psi %3D %3D Oe = 9020 – 3469 = 5551 psi

h=depth %3D p pressure Oe= effective stress %3D p= pgh Example: Estimate pressure and effective stress at 8000 ft (2438.281 m) Density of Water = 1000 kg/m Rock Density = 2600 kg/m Acceleration of Gravity = 9.81 m/sec %3D Units Conversion - Pa to psi = 1.450377X10 P rock = (2600)(9.81)(2438.281)(1.450377x10*) = 9020 psi %3D %3D P water = (1000)(9.81)(2438.281)(1.450377x10*) = 3469 psi %3D %3D Oe = 9020 – 3469 = 5551 psi

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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p=Density g= Acceleration of Gravity h= depth %3D p= pressure Oe= effective stress p= pgh Example: Estimate pressure and effective stress at 8000 ft (2438.281 m) Density of Water = 1000 kg/m' Rock Density = 2600 kg/m Acceleration of Gravity = 9.81 m/sec Units Conversion – Pa to psi = 1.450377X10 P rock = (2600)(9.81)(2438.281)(1.450377x10*) = 9020 psi P water = = (1000)(9.81)(2438.281)(1.450377x10*) = 3469 psi Oe = 9020 – 3469 = 5551 psi
Transcribed Image Text:p=Density g= Acceleration of Gravity h= depth %3D p= pressure Oe= effective stress p= pgh Example: Estimate pressure and effective stress at 8000 ft (2438.281 m) Density of Water = 1000 kg/m' Rock Density = 2600 kg/m Acceleration of Gravity = 9.81 m/sec Units Conversion – Pa to psi = 1.450377X10 P rock = (2600)(9.81)(2438.281)(1.450377x10*) = 9020 psi P water = = (1000)(9.81)(2438.281)(1.450377x10*) = 3469 psi Oe = 9020 – 3469 = 5551 psi
Lithostatic, Hydrostatic, and Effective Stress Complete the Table Below Assume: O = Prock and OH= Pwater %3D p - Density Z - Depth ft OL Он OE Basalt 2629.00 5000.00 Gneiss 2790.00 5000.00 Limestone 2300.00 5000.00 Shale 2720.00 5000.00 Sandstone 2170.00 5000.00 Concrete 2400.00 5000.00 Basalt 2629.00 15000.00 Gneiss 2790.00 15000.00 Limestone 2300.00 15000.00 Shale 2720.00 15000.00 Sandstone 2170.00 15000.00 Concrete 2400.00 15000.00
Transcribed Image Text:Lithostatic, Hydrostatic, and Effective Stress Complete the Table Below Assume: O = Prock and OH= Pwater %3D p - Density Z - Depth ft OL Он OE Basalt 2629.00 5000.00 Gneiss 2790.00 5000.00 Limestone 2300.00 5000.00 Shale 2720.00 5000.00 Sandstone 2170.00 5000.00 Concrete 2400.00 5000.00 Basalt 2629.00 15000.00 Gneiss 2790.00 15000.00 Limestone 2300.00 15000.00 Shale 2720.00 15000.00 Sandstone 2170.00 15000.00 Concrete 2400.00 15000.00
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