SOIL MECHANICS - CHAPTER 11 doc
SOIL MECHANICS - CHAPTER 11 doc
... solution (11. 4) with respect to r. This givesdhdr=Q02πkHr. (11. 6)This means that the specific discharge in r-direction is, using Darcy’s law,qr= −kdhdr= −Q02πHr. (11. 7)The total ... allconditions, and therefore must be correct.Arnold Verruijt, Soil Mechanics : 11. FLOW TOWARDS WELLS 71point just between the two wells? 11. 2 A well in a circular area of radius 1000 m appears to ... from the soil. It is postulated that the solution of this problem ish = h0+Q02πkHln(rR), (11. 4)where Q0is the discharge of the well, k the hydraulic conductivity of the soil, H the...
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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, ... discipline Soil mechanics is the science of equilibrium and motion of soil bodies. Here soil is understood to be the weathered material in the upper layers ofthe earth’s crust. The non-weathered ... contributions to soil mechanics are due to Coulomb, whopublished an important treatise on the failure of soils in 1776, and to Rank-ine, who published an article on the possible states of stress in soils...
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SOIL MECHANICS - CHAPTER 5 docx
... the soil. In later chapters a pro-cedure for the calculation of these settlements willbe 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 theparticles in the soil. If the soil consists of very coarse material, the groundwater level in the soil ... deformation must be consid-ered.Subsidence of the soil can also be caused by the extrac-tion of gas or oil from soil layers. The reservoirs con-taining oil and gas are often located at substantial...
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SOIL MECHANICS - CHAPTER 7 docx
... ofthe hydraulic conductivity of various soils is given in Table 7.1.45Arnold Verruijt, Soil Mechanics : 7. PERMEABILITY 477.2 Falling head testFor soils of low permeability, such as clay, ... that very small quantities of flowing water can be measured.Arnold Verruijt, Soil Mechanics : 7. PERMEABILITY 46Type of soil k (m/s)gravel 10−3− 10−1sand 10−6− 10−3silt 10−8− 10−6clay ... Chapter 7PERMEABILITY7.1 Permeability testIn the previous chapter Darcy’s law for the flow of a fluid through a porous medium...
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SOIL MECHANICS - CHAPTER 10 doc
... who wishes to knowthe effective stresses, so that the deformations of the soil can be calculated.Arnold Verruijt, Soil Mechanics : 10. FLOW NET 66From the flow net the force on the particles can ... precisely in x-direction if the valueof Ψ is constant in x-direction. This can be checked by noting that thecondition qz= 0 can only be satisfied if ∂Ψ/∂x = 0. Similarly, the flowis in z-direction ... the x-direction coincides with the direction of flow, the value of qzis 0. It then follows from (10.2) and (10.5) that in that case Φ isconstant in z-direction, and that Ψ is constant in x-direction....
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Soil mechanics - Chapter 15 docx
... thatt = 0 : p =σ1 + nβ/mv. (15.22)Arnold Verruijt, Soil Mechanics : 15. CONSOLIDATION 91including the influence of the weight of the soil layers as a given initial state, and to regard all ... account.It follows from (15 .11) and (15.12), assuming that the hydraulic conductivity k is constant,∂εvol∂t= −nβ∂p∂t+kγw∂2p∂z2. (15.13)Arnold Verruijt, Soil Mechanics : 15. CONSOLIDATION ... Arnold Verruijt, Soil Mechanics : 15. CONSOLIDATION 95This is the initial condition. It means that at the time of...
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SOIL MECHANICS - CHAPTER 21 docx
... Arnold Verruijt, Soil Mechanics : 21. TRIAXIAL TEST 127σ3= σc, (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 willtouch 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 clay careArnold Verruijt, Soil Mechanics : 21. TRIAXIAL TEST 129...........................................................................................................................
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SOIL MECHANICS - CHAPTER 24 doc
... coefficients A and B in this case ?24.3 Dense soils tend to expand in shear (dilatancy). Loose soils tend to contract (contractancy). Do you think that the soil in problem 23.1 is dense,or loose?24.4 ... pressure increases by 20 kPa. Ifthe soil were perfectly elastic, what would then be the increment of the pore pressure? Chapter 24PORE PRESSURESIn the previous chapters the main principles of triaxial ... needle. Whatever theprecise system is, care should be taken that the measuring de-138Arnold Verruijt, Soil Mechanics : 24. PORE PRESSURES 140Test σ3σ1− σ3p σ3σ11 40 0 0 40 4040...
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SOIL MECHANICS - CHAPTER 25 doc
... Verruijt, Soil Mechanics : 25. UNDRAINED BEHAVIOR OF SOILS 15025.2 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 25UNDRAINED BEHAVIOR OF SOILSIf no drainage is p oss ible from a soil, because the soil has been sealed off, or because the load is applied ... is no time for outflow of water, there will be no consolidation of the soil. T his is the undrained behavior of a soil. This chapter contains an introduction to the description of this undrained...
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SOIL MECHANICS - CHAPTER 26 doc
... agreement with the values obtained in Chapter 24.Arnold Verruijt, Soil Mechanics : 26. STRESS PATHS 152other parameters (such as the value of σ2) too, so that the Mohr-Coulomb failure criterion should ... of a soil, because the Mohr-Coulomb failure criterion can be formulated in σand τ, but for smaller stresses it may be a first approximation only. Actually, even the failure criterion of a soil ... factor12in the two defini-tions results in σ and τ being the location of thecenter, and the magnitude of the circle in Mohr’sdiagram, see Figure 26.1. By choosing these pa-rameters it is implicitly...
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