Investigations of the distribution of contact pressures in a short bored pile with a radial enlarged toe

A. M. Yagudin and G. A. Druzhinin, Guide to the Design and Construction of Foundations of Short Bored Piles with Radial Enlarged Toes [in Russian], Ogrtekhstroi, Kuibyshev (1972).

I. Lukashenko, Provisional Technical Instructions for the Design and Construction of Foundations on Bored Piles with an Enlarged Toe [in Russian], NIISK, Kiev (1969).

GOST 5686-69. Piles and Tubular Piles. Field Testing Methods [in Russian], Gosstroi SSSR, Moscow (1969).

Instructions on Testing Piles and Soils [in Russian], VNIITS Mintransstroya, Moscow (1956).

G. A. Druzhinin, "Stressed-strained state of soil during enlargement of the bottom of a bore hole by the tamping method," in: Proceedings of the 29th Scientific-Technical Conference of the A. I. Mikoyan Kuibyshev Civil Engineering Institute [in Russian] (1972).