BuyFindarrow_forward

Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939

Solutions

Chapter
Section
BuyFindarrow_forward

Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939
Textbook Problem

Redo Problem 16.13 with the following data: gross allowable load = 184,000 lb, γ = 121 lb/ft3, c′ = 0, ϕ = 26 ° , Df = 6.5 ft., and required factor of safety = 2.5.

16.13 A square footing (B × B) must carry a gross allowable load of 1160 kN. The base of the footing is to be located at a depth of 2 m below the ground surface. If the required factor of safety is 4.5, determine the size of the footing. Use Terzaghi’s bearing capacity factors and assume general shear failure of soil. Given: γ = 17 kN/m3, c′ = 48 kN/m2, ϕ = 31 ° .

To determine

Find the size of the footing.

Explanation

Given information:

The gross allowable load (qall) is 184,000 lb.

The location of depth of footing base Df is 6.5 ft.

The factor of safety Fs is 2.5.

The unit weight of the soil γ is 121lb/ft3.

The value of cohesion c is 0.

The soil friction angle ϕ is 26°.

Calculation:

Determine the ultimate bearing capacity of the soil (qu) using the relation.

qu=1.3cNc+qNq+0.4γBNγ=1.3cNc+γDfNq+0.4γBNγ (1)

Here, Nc is the contribution of cohesion, Nq is the contribution of surcharge, and Nγ is the contribution of unit weight of soil.

Refer Table 16.1, “Terzaghi’s bearing-capacity factors–Nc, Nq, and Nγ” in the textbook.

Take the Nc as 27.09, Nq as 14.21, and Nγ as 9.84 for the ϕ value of 26°.

Substitute 0 for c, 27.09 for Nc, 121lb/ft3 for γ, 6

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Engineering Solutions

Find more solutions based on key concepts

Show solutions add

Give the following matrices: [A]=[21001661412418],and[B]=[2100420012418] calculate the determinant of [A] and [...

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

What is Hadoop, and what are its basic components?

Database Systems: Design, Implementation, & Management

Label the parts of the surface grinder.

Precision Machining Technology (MindTap Course List)

What type of sending unit is typically used to monitor oil pressure?

Automotive Technology: A Systems Approach (MindTap Course List)

Convert P = 5.00 atm into Pa, bar, and psia.

Fundamentals of Chemical Engineering Thermodynamics (MindTap Course List)

On which networking device do you configure VLANs?

Network+ Guide to Networks (MindTap Course List)

What are stringer beads?

Welding: Principles and Applications (MindTap Course List)

What are some capabilities of artificial intelligence?

Enhanced Discovering Computers 2017 (Shelly Cashman Series) (MindTap Course List)