Chapter 9, Problem 9.8P

Principles of Geotechnical Enginee...

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

Chapter
Section

Principles of Geotechnical Enginee...

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

A 10-m-thick layer of stiff saturated clay is underlain by a layer of sand (Figure 9.28). The sand is under artesian pressure. A 5.75-m-deep cut is made in the clay. Determine the factor of safety against heaving at point A.Figure 9.28

To determine

Find the factor of safety against heaving at point A.

Explanation

Given information:

The thickness (H) of the stiff saturated clay is 10 m.

The depth (h) of the cut is 5.75 m.

The depth (d) of water table is 6.0 m.

The density of the saturated clay ρsat(clay) is 1,925kg/m3.

The density of the sand ρsand is 1,840kg/m3.

Calculation:

Consider the stability of point A in terms of heaving:

Calculate the saturated unit weight γsat(clay) of the clay using the relation.

γsat(clay)=ρsat(clay)γwaterρwater

Here, γwater is the unit weight of the water and ρwater is the density of water.

Take the unit weight of the water as 9.81kN/m3.

Take the density of the water as 1,000kg/m3.

Substitute 1,925kg/m3 for ρsat(clay), 9.81kN/m3 for γwater, and 1,000kg/m3 for ρwater.

γsat(clay)=1,925(9.81)1,000=18.88kN/m3

Calculate the total stress σA at point A using the relation

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

What is Hadoop, and what are its basic components?

Database Systems: Design, Implementation, & Management

What are cryptography and cryptanalysis?

Principles of Information Security (MindTap Course List)

What is risk management?

Management Of Information Security

What advantage does resistance welding have over forge welding?

Welding: Principles and Applications (MindTap Course List)

Explain issues surrounding ownership of text messages sent using company-issued devices.

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