Download e-book for kindle: Craig's soil mechanics by R.F. Craig

By R.F. Craig

ISBN-10: 0203865243

ISBN-13: 9780203865248

ISBN-10: 0415561256

ISBN-13: 9780415561259

ISBN-10: 0415561264

ISBN-13: 9780415561266

Now in its 8th version, this article maintains to combination readability of clarification with intensity of assurance to offer scholars with the basic ideas of soil mechanics. From the principles of the topic via to its program in perform, the ebook offers an crucial better half to undergraduate classes.
Basic features of Soils Seepage powerful rigidity Consolidation Soil Behaviour in Shear floor research In-Situ trying out Shallow Foundations Deep Foundations complicated starting place issues keeping constructions balance of Self-Supporting Soil lots Illustrative situations

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Attraction between particles is due to short-­range van der Waals forces (electrical forces of attraction between neutral molecules), which are independent of the double-­layer characteristics, that decrease rapidly with increasing distance between particles. The net inter-­particle forces influence the structural form of clay mineral particles on deposition. If there is net repulsion the particles tend to assume a face-­to-face orientation, this being referred to as a dispersed structure. If, on the other hand, there is net attraction the orientation of the particles tends to be edge-­to-face or edge-­to-edge, this being referred to as a flocculated structure.

The soil sample is passed through a series of standard test sieves having successively smaller mesh sizes. The mass of soil retained in each sieve is determined, and the cumulative percentage by mass passing each sieve is calculated. g. a 4% solution of sodium hexametaphosphate) and washed through the sieves. The particle size distribution (PSD) of a fine soil or the fine fraction of a coarse soil can be determined by the method of sedimentation. This method is based on Stokes’ law, which governs the velocity at which spherical particles settle in a suspension: the larger the particles are the greater is the settling velocity, and vice versa.

At high water contents, however, the dry density decreases with increasing water content, an increasing proportion of the soil volume being occupied by water. If all the air in a soil could be expelled by compaction, the soil would be in a state of full saturation and the dry density would be the maximum possible value for the given water content. However, this degree of compaction is unattainable in practice. 16 Dry density–water content relationship. 17; the curve is referred to as the zero air voids line or the saturation line.

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Craig's soil mechanics by R.F. Craig

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