RETRIEVING RUN AWAY BETWEEN ELEMENTS PIER PILE FOUNDATIONS

Abstract

Physical (on small scale models) and mathematical modeling of column pile foundation with different geometric
parameters and in different soils are executed.
It is established that the redistribution of the load between the basement pile depends on the stage of loading and rigidity
of the rafters. As the load on the bush increases, the average load on the cob in the foundation increases and for pile
foundations in sandy soils exceeds the bearing capacity of a single crop. In the initial stages of loading at hard rafters, the
greatest efforts are perceived by angular piles, the least - central, with further increase in load and its approximation to the
limiting value there is a redistribution of efforts from the angles and extreme piles to the central due to the exhaustion of the
bearing ability of angular piles. For flexible rafters, the load between the piles of the group is initially distributed evenly, and
as the load increases, the central effort takes on the greatest effort.
The degree of implementation of the bearing capacity of the piles in the pile foundation depends on the relative length
and pitch of the pile. Implementation of the bearing capacity of piles in the foundation increases with increasing pile steps
and increasing their relative length. With a relative length of piles (l / d) less than 15 their sizes are compatible with the size
of the grille in the plan, and such pile foundations are better to be considered as the only ground-pile massif.
With an increase in the axial distance between the piles, the fraction of the load borne by the razverk increases as the
area of contact of the plate of the rakeholder with the ground mass increases; when increasing the value of the reduced
length of the piles load, which perceives the grill, decreases, and the piles take on a large proportion of the load.
The use of the obtained dependencies during calculations will allow to provide during the design saving of materials of
piles up to 40%.