By Eddie Bromhead, E.N. Bromhead
ISBN-10: 0203975359
ISBN-13: 9780203975350
ISBN-10: 041925580X
ISBN-13: 9780419255802
The recent version of this profitable ebook has been completely revised to take account of modern advances in our realizing of slope balance and instability.
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Extra info for Stability of Slopes
Example text
Areas subject to landslide hazard are widespread. The damage from slope movements often amounts to between 25 and 50% of all the costs arising from geological and other natural causes, and they are therefore a major concern to the geotechnical profession. The geotechnical engineer and engineering geologist need not feel that they are neglecting the rest of their professional duties if they concentrate on the stability of slopes: the potential costs of failure and savings are justification enough.
These discontinuities can include the bedding, but faulting, tectonically induced shearing and jointing in the rock mass each have a role to play in the development of failures. A mode of failure characteristic of rock slopes occurs where two intersecting discontinuities daylight in the slope face and the resulting discontinuity bounded wedge moves along the V-shaped notch formed by those discontinuities (Hoek, 1973). Where they are open joints, such sliding is assisted by joint-water pressures.
In the more exposed parts of the cliff the cycle time is between 30 and 50 years in duration. Some points arising from this are worthy of note. Firstly, in what is overall a steady retreat of the cliff there are cycles of behaviour. Most prominent of these is the major cycle of big landslide followed by slower erosion, but of almost equal importance is the annual climate-driven cycle. In the summer, the clay in the mudslides is baked and hard: it can be walked on easily. In contrast, during the winter, mudslide deposits several metres thick can trap the unwary.
Stability of Slopes by Eddie Bromhead, E.N. Bromhead
by Paul
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