Работа посвящена характеристике исходного состояния дисперсных грунтов - их структурной прочности. Знание ее изменчивости позволяет определить степень уплотненности грунта и, возможно, особенности истории его формирования в данном регионе. Оценка и учет этого показателя при испытаниях грунтов имеет важнейшее значение при определении характеристик их физико-механических свойств, а также при дальнейших расчетах осадок оснований сооружений, что слабо отражено в нормативных документах и мало применяется в практике инженерно-геологических изысканий. В работе кратко изложены наиболее распространенные графические методы определения показателя по результатам компрессионных испытаний, полученные результаты лабораторных исследований структурной прочности дисперсных грунтов территории Томской области. Выявлены взаимосвязи между структурной прочностью грунтов и глубиной их залегания, степень их уплотненности. Даны краткие рекомендации по применению показателя.
Work is devoted to one of main indicators of initial state of dispersed soils - their structural strength (preconsolidation or yield stress). Knowledge of its variability helps to determine the degree of compaction of the soil and history of its formation in the region. Assessment of this variable during testing of soils is critical in determination of the characteristics of their physical and mechanical properties, and also this parameter is valuable for further calculations of soil settlement that poorly reflected in normative documents and little used in the practice of engineering and geological surveys. The article summarizes the most common methods of determination of required parameters using graphic methods based on analysis of results of soil compression tests and results of laboratory studies of the structural strength of dispersed soil for Tomsk region. In this work we are revealed relations between the structural strength of soils and their depth, their degree of compaction. In conclusion we gives brief recommendations for the use of this indicator.
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