| dc.description.abstract | Given the increasing land prices, the need for construction development on unsuitable lands
(from a geotechnical perspective), environmental restrictions on the use of quality lands,
etc., there is an ever-increasing need for the development of new methods for improving
substandard lands. Choosing the right method for improvement in a specific site is of
utmost importance. Depending on the project conditions, including the location of
implementation, adjacent structures, available technologies, and the project's economy, one
can benefit from one of the soil improvement methods. One of the applications of deep
foundations is when the soil at shallow depths does not have sufficient bearing capacity,
and the loads must be transferred to the harder layers below. Stone columns can be referred
to as an ideal option for improving loose layered soils, clays, and loose silty sands.
Considering the implementation conditions, the stone column method is more known as an
empirical method and requires more extensive research to predict the ultimate strength of
the soil reinforced by this method. Factors such as column length, column diameter,
gradation of column materials, protective coating on the column, and the arrangement of
columns when employing a group of columns should be considered, and different results
can be obtained by changing any of these factors. Therefore, the need for further research
in this field is felt.
This document focuses on the study and modeling of stone columns covered with a
protective layer, featuring gravel mattress on the columns, as well as the utilization of tire derived
aggregate (TDA). The study has explored the impact of reinforcement on the load bearing
capacity of footings by examining encased stone columns. It is hoped that through
acquiring the necessary expertise in this field and conducting extensive research, new
solutions or at least ones that complement previous studies in this area can be provided. | en_US |
