VERTICAL DISPLACEMENT OF BORED PILES GROUP FOR PROJECT OF LRT USING NUMERICAL ANALYSIS

Abstract

This article discusses the problem of the bearing capacity of piles with defects in the pile body.
Field trials were performed using the non-destructive Sonic Logging (CSL) method. The object of the study
is bored piles with a diameter of 1.0 - 1.5 m and a length of 8 - 55 m. This article solves the problem of
bearing capacity of piles with defects of 10%, 20% and 30%, respectively, in the body of the pile. For
modeling, we used load test data from bored piles at the LRT construction site. In this study, only the
maximum strain value is needed to compile several cases with various defects using two-dimensional finite
element analysis (FEMA) based on the Midas-GTS NX program. According to the results of field tests and
modeling of piles, it was found that more than 20% of piles have defects. Field data and numerical
simulations have also been confirmed on the recommendation of Bjerrum