The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 1 Lateral Earth Pressure
Chao ZHOU
Active earth pressure
c ' tan
From the geometric relationship,
D
E
O
3
C
1
Rearrange,
1 sin
1 sin
h
v 2c
1 sin
1 sin
The horizontal stress must
be the minor pr
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
Chapter 2
Design of retaining walls 2
Instructor: Chao ZHOU
Tutor: Luis LIU
CIVL 3740 Geotechnical Analysis and Design
Question 1
What are the two basic design methods for anchored sheet
pile walls?
Free earth support method allow rotation at the lower
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 4
Shallow foundations
Chao ZHOU
Terzaghis general ultimate bearing capacity theory
Zone I  Elastic zone: ABJ immediately under the foundation (the angle between the
foundation base and AJ, BJ are equa
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
You will need:
Pen
Paper
Calculator
Brain
Note:
This PPT will be
uploaded to Canvas
later
Tutorials #5 & #6
CIVL 3740 GEOTECHNICAL ANALYSIS AND DESIGN
Instructor: Chao ZHOU
Tutor:
George GOODWIN
CIVL 3740 TUTORIALS #5 & #6
1
Part #1: Braced
Excavation
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 2
Design of retaining walls
Chao ZHOU
Coulombs theory (1776) of earth pressure
1. Consideration of the stability of soil as a whole, defining a trial failure plane
and calculating limiting equilibrium
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 8
Slope stability
Chao ZHOU
The Method of Slices
(Part 3: noncircular failure surface)
Janbus simplified method
Janbu et al. (1956) published one of the first routine methods for the analysis of NON
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 5
Deep foundations
Chao ZHOU
Types of pile group
Type 1:
Piled raft  the cap is in contact with
the ground, as in most cases
Das (2004)
Type 2:
Free standing  the cap well above the
ground, as in off
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740
Tutorial 11: Deep Foundation and Slope stability
Instructor: Prof. ZHOU Chao
TA :
BUI, Duc Tung
Mail: dtbui@connect.ust.hk
DEEP FOUNDATION
2
I. Negative Skin Friction (NSF)
Recalled terminologies and mechanisms
Shear stress from soil to pile ac
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 4
Shallow foundations
Chao ZHOU
Three failure modes of shallow foundations
(a) General shear failure likely on
dense sand or stiff clay
(b) Local shear failure likely on
medium dense sand or medium clay
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740
Tutorial 8: Shallow Foundations (Part 2)
Name: Fong Kin Yew
Email: kyfongad@connect.ust.hk
Terzaghis Bearing Capacity Theory
Terzaghis bearing capacity equation (applicable for strip footing):
For circular footing:
For square footing:
For re
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740
Tutorial 9: Shallow Foundation
and Deep foundation
Name: CHEN, Yaohui
Email: ychencn@connect.ust.hk
Shallow Foundations
Types of foundation settlement
Uniform stress
distribution
Flexible
foundation
Nonuniform settlement
distribution
Nonunifor
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740
Tutorial 10: Deep foundation
Name: CHEN, Yaohui
Email: ychencn@connect.ust.hk
Vertically loaded single pile in
uniform clay
End bearing capacity in clay (u=0)
Gross end bearing capacity per unit area
(Meyerhofs method):
qb N c*cu N q*q
Net end b
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 8
Slope stability
Chao ZHOU
Assumptions for infinite slope analysis
Depth of failure is small compared to the length of the slope, with negligible end effects
The potential failure surface is paralle
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
Chapter 1
Lateral Earth
Pressure
CIVL 3740 GEOTECHNICAL ANALYSIS AND DESIGN
TUTORIAL #1
1
Example #3
1/6
A retaining wall is shown below. There are two layers of soil. Find the
total Rankine active force per unit length of the wall, P . Find also the
loc
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 1 Lateral Earth Pressure
Chao ZHOU
1. 0  Lateral earth pressure
Coefficient of lateral earth pressure
K
'
h
'
v
K is defined
in terms of effective stress
v' ' D
h' v' K ' DK
Where D and are depth and
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 1 Lateral Earth Pressure
Chao ZHOU
What are the Design Limit States?
1. Ultimate limit state  prevent catastrophic collapse
2. Serviceability limit state  serviceable
Drying Case
Wetting Case
Evaporat
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740Assignment 2
(100 marks in total)
Q1: Details of a reinforced concrete cantilever retaining wall are shown in Fig. 1. The unit
weight of concrete is 24kN/m3. Due to the inadequate drainage, the water table rose to the level
indicated, while the
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740Assignment 1
(100 marks in total)
Q1 (40 marks): Refer to the following figure, given H = 4m, H1 = 1.5m, q = 20 kPa, = 16 kN/m3,
sat = 20 kN/m3, c = 0, = 32: (a) Determine the lateral earth pressure distribution, the atrest
lateral earth force
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740 Assignment 3 (Due date: 1st April)
Q1: A braced excavation is shown in Fig. 1. The struts are located at 2m center to center on plan
(i.e. along the length of the excavation). Draw the earth pressure envelopes and determine the
strut loads at le
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
Given paramters
From
0.0 m
Surcharge load 20 Kpa
c
From
sat
16 kN/m3
0
32
1.5 m
to
1.5
m
K0
1sin()
0.47
to
K0
4.0
m
20 kN/m3
1sin()
c
0
0.47
32
Effective lateral earth pressure distribution
'v
Depth
0.0 m
'h
Depth
1.5 m
'v
20.00 kPa
9.40 kPa
20.00
24.00
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
CIVL 3740  Geotechnical Analysis and Design
Chapter 1 Lateral Earth Pressure
Chao ZHOU
1. 0  Lateral earth pressure
Coefficient of lateral earth pressure
K
'
h
'
v
K is defined
in terms of effective stress
v' ' D
h' v' K ' DK
Where D and are depth and
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
Chapter 2
Design of retaining walls 1
Instructor: Chao ZHOU
Tutor: Luis LIU
CIVL 3740 Geotechnical Analysis and Design
1
Short question 1
What are the common types of retaining walls?
Gravity and cantilever concrete walls
Cantilever sheet pile walls
An
The Hong Kong University of Science and Technology
Geotechnical Analysis and Design
CIVL 3740

Spring 2016
You will need:
Pen
Paper
Calculator
Brain
Note:
This PPT will be
uploaded to Canvas
later
Tutorials #5 & #6
CIVL 3740 GEOT ECHNICA L A NA LYSIS A ND D ESIGN
Instructo r: Chao ZHOU
Tuto r:
Geo rge GOOD WIN
CIVL 3740 TUTORIALS #5 & #6
1
Part