Last Updated:April 22, 2023 © LMS SEGi education group 1

ECG 4413GEOTECHNICS

WEEK 5STABILITY OF SLOPES 2

PowerPoint® Slidesby Mohamad Shakri

Last Updated:April 22, 2023 © LMS SEGi education group 2

Chapter Overview

• Chapter 2 introduced you to the basic slopes stability. Students need to know the soil’s behaviour when the sliding occurs.

• Awareness of the shearing resistance is important in order to analyze soil stability problems.

Learning Objectives

• To introduce the basic concept of slope stability. • Students manage to know the soil condition

when slope started to fail. • Student can understand the causes that make

the slope fail. • They also can take precaution method when

designing the slope stability to avoid slope failure.

Last Updated:April 22, 2023 © LMS SEGi education group 3

Learning Outcomes

• On completion of this topic, students must be able to understand the characteristics of the soil when it’s started to slide.

• Able to describe the causes that make the slope fail.

• Able to explain certain method to avoid slope failure.

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Types of Slope Stability Analysis

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1. Circular Arch Analysis

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1.a Effect of Tension Crack

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Example 1

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1.b Effect of Stratified (more than 1 layer) soil Layer

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Example 2

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2. Ordinary/ Swedish/ Fellenius Method

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Cont..

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Example 3

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Example 4

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• Assignment: slope protection

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Reference

• Roy Whitlow (2001), Basic Soil Mechanics (4th Edition). Prentice Hall, London.