1 - Lecture 1 - Introduction

LECTURE
SLOPE STABILITY
Course
 INSTRUCTOR: Dr. Zubair Ahmed,
Phone: 03463438536
Email: Nizamani.Zubair@yahoo.com
As Per Weekly Training Program
 CLASS SCHEDULE: 3rd Floor, Civil Eng. faculty room
 ROOM: Open Door Policy
 OFFICE HOURS: Duncan, J. M and Wright, S. G.
 TEXTBOOK: (2005), Soil Strength and Slope
Stability, John Wiley & Sons
 SUGGESTED BOOK:
 Abramson et al. (2001), Slope Stability and Stabilization Methods, John Wiley & Sons.
 Hoek, E (1981); Rock Slope Engineering, Institute of Mining and Metallurgy.
 Landslides; Analysis and Control, Transportation Research Board Special Report 176 National Academy of Sciences.
Course Description
To equip the students with the state of the art
software dealing with Slope Stability
problems. The understanding of Land Slide,
Mudflows, Rock Slides and Rock Mechanics
as well as Preventive and Stabilization
Strategies.
Course Objectives
The purpose of this course is to
provide the students with an in-depth
knowledge and understanding of the
analysis of slope stability problems and
its remedial measures.
The course is designed so that students
1 achieve following PLOs:
Engineering Knowledge: ☐ 7 Environment and Sustainability: ☐
2 Problem Analysis: ☐ 8 Ethics: ☐
3 Design/Development of Solutions: ☑ 9 Individual and Team Work: ☐
4 Investigation: ☐ 10 Communication: ☐
5 Modern Tool Usage: ☑ 11 Project Management: ☐
6 The Engineer and Society: ☐ 12 Lifelong Learning: ☐

Course Learning Outcomes
(CLOs)
Upon completion of this course the student will be able to do
the
following: Taxonom
S.No CLO Domain PLO
y Level
Compare different stability conditions for
analysis and outline appropriate
1 laboratory test procedures for the Cognitive 4 -
characterization soil materials with respect
to shear strength.
Design a slope using various limit
2 equilibrium procedures for slope stability Cognitive 5 3
analysis and select the most appropriate
procedure for the given set of
condition.
Evaluate slope stability of a given slope
using different limit equilibrium (LE) and
3 Finite Element (FE) software and Cognitive 6 5
recommend economical solution in order to
improve slope stability.
Course outline
Topics Sections Covered/Reading Assignment
1 Introduction
2 Slope Instability
3 Types of Slope Instability
4 Examples and Causes of Slope Failures
5 Soil Mechanics Principals
6 Stability Conditions for Analysis
7 Shear Strengths of Soils and Municipal Solids Wastes (MSW)
8 Geotechnical Behavior Models
10 Analysis Methods
11 Analysis Methods-2
12 Rock Slope Stability
13 Rock Shear Strenth-1
15 Rock Slope analysis
16 Slope Instability Mitigation
17 Landslide Risk Assessment
June End Semester Exam
6
Term Project /
Complex Engineering Problem (CEP)
 Term Project/CEP will be prepared and
presented by group of 3-4 students
 Each group will submit term project/CEP in
binded form in standard format
 Each group may be asked to deliver a
presentation in front of class prepared on power
point
 In that case, 50% marks will be for presentation
 It will be appreciated that each group will work
on term paper/CEP during whole semester
Term Project
Use any of the following software in the term
project/CEP
 ROCSCIENCE-SLIDE
 ROCSCIENCE-PHASE 2
 PLAXIS 2D
 FLAC 2D
Term Project
 Slope Stability Analysis of Jhika Gali Land Slide using any Software
 Slope Stabilization Methods
 Slope stability study of KKH using any Software
 Seismic Slope Stability
 Comparison between deterministic and probabilistic slope stability
analysis
 Geotechnical Investigations for Slope Stability Study of a Highway
 Slope stabilization using Hydro-seeding
 Slope stabilization by Geogrid
 Slope Stabilization with soil nailing
 Any other relevant topic of your choice
Schedule for Term Papers
LANDMARK DEADLINE /
NO LATER THAN
Proposal 4th
Wee
Progress Report # 1 k
7th Week
Progress Report # 10th Week
2 Progress Report 13th Week
# 3 16th Week
Draft Paper 17th Week
Final 17th and 18th
Week
Paper
Grade
ITEM Distribution
No MARKS
(%)
Quizzes* 3-4 5’-10
Assignments^ 3-4 5-
10’
Term Project 1 5’-10
OHT 2-3
30
Final Exam 1
50
Policy
 Attendance
 Shortage
 Within 5 minutes
 Assignment Policy
 Within due date
 No/reduced grading for copying
 Late assignments may not be
marked
 Individual Laboratory work
 Cell phones/texting
Course outline
Topics Sections Covered/Reading Assignment
1 Introduction
2 Slope Instability
3 Types of Slope Instability
4 Examples and Causes of Slope Failures
5 Soil Mechanics principals
6 Stability Conditions for Analysis
7 Shear Strengths of Soils and Municipal Solids Wastes (MSW)
10 Analysis Methods
11 Analysis Methods-2
12 Rock Slope Stability
15 lecture13- Rock Slope analysis
16 Slope Instability Mitigation
17 Landslide Risk Assessment
June End Semester Exam
13
Introduction
Despite improvements in recognition, prediction

and mitigation measure, natural landslides and
engineered slope failures still exact a heavy social,
economic and environmental toll.
Introduction
Throughout the world, valleys in

mountainous regions have
experienced accelerated economic
development in response to
general population growth and
associated demands for increased
mining, forestry and agriculture
activity
About 50,000 people were killed in
mudslides in V enezuela between 1999-
2000
Introduction
Economic growth has
demanded expansion of transportation
and communication facilities
The short history of extensive
human development in many
regions, however, makes the
evaluation of potential landslides
hazards and appropriate counter
measures very difficult
Rain triggered flooding and
landslides in the Alps resulted in 37
deaths 450 million US$ in damage
during October 2000
Introduction
 Duncan, J. M and Wright, S. G. (2005), Soil Strength and
Slope Stability, John Wiley & Sons.
 Why Select this book ?
Introduction
 Advances in geotech vs challenges
 Cases when geological and soil conditions
evaluated using good practices but still
new surprises
Waco Dam
 Oct 1961-Construction disrupted
 Slide in 1500 ft embankment on pepper shale
 Heavily OC stiff fissured clay
 Pepper shale uplifted to surface bounded by two fault
zones
crossing axis of dam
 No movement beyond fault boundaries
 Section degraded to 40 ft
 USACE conducted investigation
 Strength along horizontal planes <40% of vertical specimen
 Conventional testing was safe
 Conventional testing for stiff fissured clay may be
misleadin
Introduction
Introduction
 Under water slope in San Francisco bay
 250 ft long and 90 ft high slope failed
 Failure entirely in San Francisco Bay Mud
 Much studied highly plastic marine clay
 Considerable experience foe 1:1 slope
 Thorough investigation led to steeper slope in project
 Computed FS=1.17 but conditions well known and understood
 Strength mobilized in field after weeks < < quick loading in
lab
 Improvement in one aspect led to failure
Introduction
Summar
 Most
y
important lessons from experience
 Often experience of failures
 Semi empirical methods based on experience, should not
count on improving methods by altering only one part
 Don’t expect, no more to learn.
 Waco Dam- Conventional methods insufficient to
estimate strength of pepper shale

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LECTURE

2 Problem Analysis: ☐ 8 Ethics: ☐

3 Design/Development of Solutions: ☑ 9 Individual and Team Work: ☐

5 Modern Tool Usage: ☑ 11 Project Management: ☐

6 The Engineer and Society: ☐ 12 Lifelong Learning: ☐

Despite improvements in recognition, prediction

Throughout the world, valleys in

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