Preliminary estimation of loess rock subsidence rate
Abstract
The widespread socialist construction both within the Soviet Union and in the people's democracies in a number of cases is associated with the use of loess rocks as a base for various kinds of structures. The main engineering‑geological feature of these rocks, causing complications during construction and operation, is their ability to show under additional wetting uneven, mainly rapid compaction – subsidence. The latter, as is known, occurs under the influence of both the pressure of the structure and the weight of overlying wet rocks, but more often from both causes. The proposal of some authors to call the phenomenon of uneven compaction upon wetting “additional settlement”, if it is caused by external load, and to distinguish it from subsidence, caused ostensibly only by the weight of wet rocks, has no sufficient basis. Both phenomena have the same nature – compaction under additional wetting and the action of pressure. Obviously, without pressure from the latter, regardless of its nature, compaction will not occur. In addition, in the practice of civil and geotechnical engineers, the concept of “additional subsidence” has entered as a term denoting the appearance of new deformations in the rock after stabilization under certain conditions. The concept of “subsidence” quite clearly characterizes a phenomenon inherent in loess rocks.
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References
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