SOIL MECHANICS - CHAPTER 24 doc
SOIL MECHANICS - CHAPTER 24 doc
... principal
stresses,
∆σ
=
1
3
(∆σ
1
+ ∆σ
2
+ ∆σ
3
). (24. 4)
It follows from (24. 3, with σ
= σ − p, that
ε
v ol
= −
∆σ − ∆p
K
. (24. 5)
From (24. 2) and (24. 5) it finally follows that
∆p =
∆σ
1 + nβK
. (24. 6)
This formula expresses ... 13.90
3 60 98.09 19.62
Table 24. 2: Test results.
24. 2 What can you say about the coefficients A and B in this case ?
24. 3 Dense soils tend to ex...
SOIL MECHANICS - CHAPTER 1 docx
... Engineers (KIvI), with about 1000 members.
1.3 Why Soil Mechanics ?
Soil mechanics has become a distinct and separate branch of engineering mechanics because soils have a number of special properties, ... . . . . . . . . . . . . . . . . . . 245
3
SOIL MECHANICS
Arnold Verruijt
Delft University of Technology, 2001
This is the screen version of the book SOIL MECHANICS, used a...
SOIL MECHANICS - CHAPTER 5 docx
... the soil. In later chapters a pro-
cedure for the calculation of these settlements will
be presented. For this purpose first the relation be-
tween effective stress and deformation must be consid-
ered.
Subsidence ... the soil surface. In this case there are two possibilities, depending upon the size of the
particles in the soil. If the soil consists of very coarse material, the groundwat...
SOIL MECHANICS - CHAPTER 7 docx
... of
the hydraulic conductivity of various soils is given in Table 7.1.
45
Arnold Verruijt, Soil Mechanics : 7. PERMEABILITY 47
7.2 Falling head test
For soils of low permeability, such as clay, ... that very small quantities of flowing water can be measured.
Arnold Verruijt, Soil Mechanics : 7. PERMEABILITY 46
Type of soil k (m/s)
gravel 10
−3
− 10
−1
sand 10
−6
− 10
−3
silt 10
−8
− 1...
SOIL MECHANICS - CHAPTER 10 doc
... who wishes to know
the effective stresses, so that the deformations of the soil can be calculated.
Arnold Verruijt, Soil Mechanics : 10. FLOW NET 66
From the flow net the force on the particles can ... precisely in x-direction if the value
of Ψ is constant in x-direction. This can be checked by noting that the
condition q
z
= 0 can only be satisfied if ∂Ψ/∂x = 0. Similarly, the flow
is in z...
SOIL MECHANICS - CHAPTER 11 doc
... Arnold Verruijt, Soil Mechanics : 11. FLOW TOWARDS WELLS 70
The flow rate very close to the center is very large, because ... layer by a recharge well. What is the influence on the groundwater head in the
Arnold Verruijt, Soil Mechanics : 11. FLOW TOWARDS WELLS 69
It now follows, if it is assumed that the hydraulic conductivity ... from the soil.
It is postulated that the solution of...
Soil mechanics - Chapter 15 docx
... that
t = 0 : p =
σ
1 + nβ/m
v
. (15.22)
Arnold Verruijt, Soil Mechanics : 15. CONSOLIDATION 91
including the influence of the weight of the soil layers as a given initial state, and to regard all ... three
dimensional theory of consolidation is an interesting topic for further study.
Arnold Verruijt, Soil Mechanics : 15. CONSOLIDATION 94
15.2 Boundary conditions and initial condition...
SOIL MECHANICS - CHAPTER 21 docx
... Arnold Verruijt, Soil Mechanics : 21. TRIAXIAL TEST 127
σ
3
= σ
c
, (21.4)
It should be noted that the stresses in ... of the circle will gradually in-
crease, and if the force is sufficiently large the circle will
touch the straight lines indicating the Coulomb criterion,
the Mohr-Coulomb envelope. In that situation ... φ may vary from 15
◦
to 30
◦
. For the determination of c and φ of cla...
SOIL MECHANICS - CHAPTER 25 doc
... Verruijt, Soil Mechanics : 25. UNDRAINED BEHAVIOR OF SOILS 150
25.2 For a certain soil it is known that c = 20 kPa and φ = 30
◦
. An undrained analysis must be made for a case of a soil in which ... increase after the construction. As an example one may
Chapter 25
UNDRAINED BEHAVIOR OF SOILS
If no drainage is p oss ible from a soil, because the soil has been sealed off, or because...
SOIL MECHANICS - CHAPTER 26 doc
... agreement with the values obtained in Chapter 24.
Arnold Verruijt, Soil Mechanics : 26. STRESS PATHS 152
other parameters (such as the value of σ
2
) too, so that the Mohr-Coulomb failure criterion should ... of a soil, because the Mohr-Coulomb failure criterion can be formulated in σ
and τ, but for smaller stresses it may be a first approximation only. Actually, even the failure crit...