PROGNOSIS OF THE LOAD -BEARING CAPACITY OF DRILLING PILES BY NUMERICAL METHOD OF BOUNDARY ELEMENTS BASED ON THE RESULTS OF ANALYSIS OF THEIR STRESS STATE

Abstract

Construction is one of the leading sectors of the national economy in the historical aspect of its development. Prevention of destruction of structures is a very important task of construction, so a quantitative measure of strength of the foundation of the structure is required. The tasks of improving engineering solutions require designers in search of unused reserves for improving the efficiency of construction, introducing the achievements of science in design practice. One of the main areas is the further involvement of mathematical methods and computers in design practice.

Successful construction of buildings requires constant development of the basics of mechanics and geomechanics. The current trend of increasing the number of floors of buildings to 9-12 floors leads to a significant increase in the load on the foundations. For such structures, piles have to be driven in 2-3 rows, the grillage becomes wide, and the cost of reinforcement for it is significant, so the overall effect of using driven piles is reduced.

The solution to the problem of reducing the cost and reducing the time of completion of zero-cycle works is most facilitated by the use of bored piles. This is also facilitated by the transition to building with increased number of floors. Bored piles are characterized by high bearing capacity and their arrangement does not have a dynamic effect on the structures of neighboring buildings and structures. The latter circumstance is important when building within urban areas. The use of bored pile technology also allows the use of deepening to a specific pile mark.

The aim of the work is to conduct numerical simulation of the resistance of a bored pile under conditions of nonlinear deformation of the soil base on a computer.

The growing capabilities of modern computers require constant revision of existing numerical methods for the study of new classes of problems for which there is hope for a solution. One of such topical problems is the nonlinear problem of geomechanics of the behavior of bored piles under load.