EXPERIMENTAL STUDY OF THE STEPPED READY PILES

Abstract

Complex studies of semi-real models of interaction of single and group of stepped piles in sandy and clay soils. The determination of the degree of compaction of the soil half-space around the surface broadening in the form of steps, followed by the development of an effective methodology for their calculation. Determination of the dependencies of the stepped piles deformation-strength characteristics. Experimental researches of single and group of stepped piles on static vertical loading and researches of interaction of piles with various types of soils were carried out. Results. In the course of experimental studies, dependencies of the deformation-strength parameters of the deep foundation work consisting of stepped piles were established. For stepped piles, the bearing capacity is increased as a result of the formation of a soil jacket around it, so that the maximum movement of the stepped piles is obtained when they are static loaded in wet loam, and in water-saturated sands the sediment of the stepped structures is 30-60% less at different stages of static loading than in wet loam; the sediment is 8 times smaller than the usual prismatic and 3-4 times smaller than the prismatic ones with surface widening from the prefabricated wedges.