DRILLING BELLING BUCKET (PILE FOUNDATION EXPANDER) The pile foundation expander (belling bucket) is a driiling tool increasing the well diameter in the foundation due to expanding spades (plates) with reinforces flat teeth. This expansion enables to increase bearing capacity of the pile considerably not increasing the diameter of the pile itself.
The pile foundation expander (belling bucket) is a popular measure to reinfirce the bearing capacity of foundations due to more economy of the concrete mix. The expanders are used during construction of high-rise buildings and compact heavily loaded bases. TRIS company expanders (belling bucket) are sucessfully tested drilling tool which have been operated at the largest construction sites of Russia and the CIS.