Modeling of Density Properties of Subsiding Soils Under Explosive Impact

Abstract

Subsiding soils are widespread on the surface of the planet. On the territory of Russia, they cover at least 17% of the country's area. The thickness of subsiding soils is up to 50 m. Most often found in the regions of the North Caucasus and the South of Russia. Subsiding soils have a macroporous structure, which leads to deep penetration of groundwater into them. There is a rapid soaking and significant subsidence of the soil stratum. There are various methods of soil compaction. In the work, mathematical modeling of the density properties of soils as a result of their compaction by deep explosions was carried out. Methods for the practical implementation of the compaction method are taken into account: compaction of soils by deep explosions of concentrated point and distributed elongated charges. The basis of the mathematical model of the investigated technological process of compaction of subsiding soils is the initial-boundary problem with a three-dimensional parabolic differential equation. A study of the density-strength properties of soils was carried out. An assessment of various characteristics of the soil after the explosion has been implemented. The dependences of soil density on specific cohesion and moisture content are obtained for various pressure indicators . The interrelation between the specific adhesion and the angle of internal friction as a function of humidity has been established. The results obtained make it possible to predict the density and strength characteristics of soils during compaction by deep explosions.