Foundation, engg. Using Terzaghi's bearing capacity equation and a factor of safety F, = 2.5, the net safebearing capacity (expressed in kN/m²) for local shear failure of the soil is5m4m1.5m! QuestionA 4 m wide strip footing is founded at a depth of 1.5 m below the ground surface in ac-o soil as shown in the figure. The water table is at a depth of 5.5 m below groundsurface. the soil properties are c' = 25 kN/m², o = 28.63°, Ysat = 19 kN/m³, Ybulk 17 kN/3m³ and yw = 9.81 kN/m³. the values of bearing capacity factors for different o are givenbelow.NcNa12.9 4.415°20° 17.7 7.4 5.025° 25.1 12.7 9.730° 37.2 22.5 19.7Ny2.5

Given data- 4 m wide strip footing- Depth of footing = 1.5 m, Water table at 5.5 m below ground…

Answered: Using Terzaghi's bearing capacity…

Using Terzaghi's bearing capacity equation and a factor of safety F, = 2.5, the net safe bearing capacity (expressed in kN/m²) for local shear failure of the soil is 5m 4m + 1.5m

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Ultimate Bearing Capacity Of Shallow Foundations: Special Cases

Section: Chapter Questions

Problem 7.15P

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Concept explainers

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

Foundation, engg.

Using Terzaghi's bearing capacity equation and a factor of safety F, = 2.5, the net safe
bearing capacity (expressed in kN/m²) for local shear failure of the soil is
5m
4m
1.5m
!

Question
A 4 m wide strip footing is founded at a depth of 1.5 m below the ground surface in a
c-o soil as shown in the figure. The water table is at a depth of 5.5 m below ground
surface. the soil properties are c' = 25 kN/m², o = 28.63°, Ysat = 19 kN/m³, Ybulk 17 kN/
3
m³ and yw = 9.81 kN/m³. the values of bearing capacity factors for different o are given
below.
Nc
Na
12.9 4.4
15°
20° 17.7 7.4 5.0
25° 25.1 12.7 9.7
30° 37.2 22.5 19.7
Ny
2.5

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