Szukana fraza: [Abstract = "This paper describes a series of pile tests in sand. T\-cross and square cross section piles were jacking by static vertical load with a vibration. Special tests were carried out to examine the influence of T\-cross section pile form on it bearing capacity, and the results of comparison bearing capacity on one cub meter of T\-cross and square cross section jacking piles in the same ground conditions are described. The jacking vertical static load, sizes of displacements and compaction zones of a ground around a shaft of the experienced piles were investigated."]