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CHIA SẺ KIẾN THỨC KỸ THUẬT

Feb 16, 2017

EBOOK - Soil Mechanics - Concepts and Applications Second Edition (William Powrie)


In Chapter 1, the discussion on the concept of effective stress has been expanded slightly (section 1.7); and the filter rules given in section 1.9 have been changed to reflect those recommended in the revised Construction Industry Research and Information Association Report C515 on groundwater control (Preene et al.,2000).
In Chapter 5, the sections on peak strength and undrained shear strengths (including the associated worked examples) have been placed before the sections leading up to Cam clay.
As indicated above, this will enable lecturers should they so wish to offer their students a complete traditional interpretation of triaxial test data, including critical, peak and undrained stengths, without going into the concepts of yield and Cam clay.
For lecturers wishing to cover Cam clay more thoroughly, a new section has been added that includes the derivation of the Cam clay yield surface.
In Chapter 7, the long case study of the Cricklewood retaining wall has been split into four worked examples.

A significant omission in the assessment of the long-term stability of the wall in overturning has been corrected, and I have revised both this and the short-term calculation to give a treatment of factor of safety that is more consistent with the idea of a factor of safety on soil strength (strength mobilization factor) promoted by BS8002, Eurocode 7 and the revised Construction Industry Research and Information Association Report C580 on embedded retaining walls (Gaba et al., 2003). I had considered replacing this case study with a number of simpler worked examples, but the opinion of other teachers of geotechnical engineering subjects was that a single problem containing all parts of the calculation was helpful.

Origins and classification of soils   1
1.1  Introduction: what is soil mechanics?   1
1.2  The structure of the Earth   4
1.3  The origin of soils   5
1.4  Soil mineralogy   11
1.5  Phase relationships for soils   16
1.6  Unit weight   19
1.7  Effective stress   25
1.8  Particle size distributions   29
1.9  Soil filters   37
1.10  Soil description   41
1.11  Index tests and classification of clay soils   41
1.12  Compaction   45
1.13  Houses built on clay   52
1.14  Site investigation   57
2  Soil strength   68
2.1  Introduction and objectives   68
2.2  Stress analysis   69
2.3  Soil strength   78
2.4  Friction   79
2.5  The shearbox or direct shear apparatus   83
2.6  Presentation of shearbox test data in engineering units   85
2.7  Volume changes during shear   86
2.8  Critical states   89
2.9  Peak strengths and dilatancy   93
2.10  Shearbox tests on clays   99
2.11  Applications   102
2.12  Stress states in the shearbox test   105
2.13  The simple shear apparatus   111
3  Groundwater, permeability and seepage   125
3.1  Introduction and objectives   125
3.2  Pore water pressures in the ground   126
3.3  Darcy’s Law and soil permeability   132
3.4  Laboratory measurement of permeability   136
3.5  Field measurement of permeability   142
3.6  Permeability of laminated soils   146
3.7  Mathematics of groundwater flow   150
3.8  Planeflow   152
3.9  Conftned flownets   153
3.10  Calculation of pore water pressures using flownets   162
3.11  Quicksand   163
3.12  Unconfined flownets   165
3.13  Distance of influence   168
3.14  Soils with anisotropic permeability   168
3.15  Zones of different permeability   172
3.16  Boundary conditions for flow into drains   173
3.17  Application of well pumping formulae to construction dewatering   176
3.18  Numerical methods   178
3.19  Wells and pumping methods   181
4  One-dimensional compression and consolidation   195
4.1  Introduction and objectives   195
4.2   One-dimensional compression: the oedometer test   197
4.3  One-dimensional consolidation   208
4.4  Properties of isochrones   211
4.5  One-dimensional consolidation: solution using parabolic isochrones  213
4.6 Determining the consolidation coefficient cv from oedometer test data 218
4.7  Application of consolidation testing and theory to field problems   220
4.8  One-dimensional consolidation: exact solutions   239
4.9  Radial drainage   250
4.10 Limitations of the simple models for the behaviour of soils in one-dimensional compression and consolidation 253
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EBOOK - Cơ học đất - Các khái niệm và ứng dụng - Tác giả: William Powrie (741 Trang).

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