Preliminary estimation of loess rock subsidence rate
Abstract
The unfolded socialist construction both within the Soviet Union and in the countries of people's democracy 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 at additional moistening uneven, mainly rapid compaction - subsidence. The latter, as it is known, occurs under the influence of both the pressure of the structure and the weight of overlying moistened rocks, but more often from both. The proposal of some authors to call the phenomenon of uneven compaction at moistening “additional settlement”, if it is caused by external load, and to distinguish it from subsidence, caused ostensibly only by the weight of moistened rocks, has no sufficient grounds. Both phenomena have the same nature - compaction under additional moistening and pressure action. Obviously, without pressure of 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” entered as a term denoting the appearance of new deformations in the rock after stabilization in certain conditions. The concept of “subsidence” quite clearly characterizes a phenomenon inherent in loess rocks.
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