SOIL MECHANICS - CHAPTER 10 doc

... the equation of continuity, see (8.2), i.e. ∂q x ∂x + ∂q z ∂z = 0. (10. 4) 62 Arnold Verruijt, Soil Mechanics : 10. FLOW NET 67 Problems 10. 1 Sketch a flow net for the situation shown in Figure 8.7, and ... continuity equation (10. 4) is automatically satisfied, as can be verified by substitution of eqs. (10. 5) into (10. 4). It follows from (10. 5) that the flow is precisely in x-directio...

Ngày tải lên: 05/08/2014, 23:24

... of Engineers (KIvI), with about 100 0 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 ... 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 of the earth’s crust. T...

Ngày tải lên: 05/08/2014, 23:24

... 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...

Ngày tải lên: 05/08/2014, 23:24

... 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 − 10 −6 clay 10 10 − 10 −8 Table 7.1: Hydraulic conductivity ... of clay are about 100 or 100 0 times smaller than those of sand. An indication of the hydraulic conductivity of various soils is given in Table 7.1. 45 Arnold Verruijt...

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... therefore must be correct. Arnold Verruijt, Soil Mechanics : 11. FLOW TOWARDS WELLS 71 point just between the two wells? 11.2 A well in a circular area of radius 100 0 m appears to lead to a lowering ... conditioning water is extracted from a layer of 10 m thickness, having a hydraulic conductivity of 1 m/d. The discharge is 50 m 3 /d. At a distance of 100 m the water is being injecte...

Ngày tải lên: 05/08/2014, 23:24

... means that under atmospheric conditions p 0 = 100 kPa). If S = 0.99 and the pressure is p 0 = 100 kPa, then β = 10 −7 m 2 /N. Arnold Verruijt, Soil Mechanics : 15. CONSOLIDATION 92 That is still ... 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 t...

Ngày tải lên: 05/08/2014, 23:24

... 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...

Ngày tải lên: 06/08/2014, 01:20

... care should be taken that the measuring de- 138 Arnold Verruijt, Soil Mechanics : 24. PORE PRESSURES 140 Test σ 3 σ 1 − σ 3 p σ  3 σ  1 1 40 0 0 40 40 40 10 4 36 46 40 20 9 31 51 40 30 13 27 57 40 ... pressure increases by 20 kPa. If the soil were perfectly elastic, what would then be the increment of the pore pressure? Chapter 24 PORE PRESSURES In the previous chapters the main p...

Ngày tải lên: 06/08/2014, 01:20

... 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...

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... 25 40 60 25 100 70 45 30 2 95 0 0 95 95 95 0 95 20 8 115 105 97 10 95 40 17 135 115 98 20 95 60 25 155 125 100 30 95 80 33 175 135 102 40 95 100 42 195 145 103 50 95 120 50 215 155 105 60 Table ... c cos φ. (26.4) Arnold Verruijt, Soil Mechanics : 26. STRESS PATHS 155 Test σ 3 σ 1 − σ 3 p σ 1 σ σ  τ 1 40 0 0 40 40 40 0 40 10 4 50 45 41 5 40 20 9 60 50 41 10 40 30 13 70 55 42...

Ngày tải lên: 06/08/2014, 01:20