Using grout diaphragm walls to improve the efficiency of isolated footing sitting on loose sand soil: an experimental study as well as quantitative research

Abstract

Foundations often encounter heightened demands due to increasing loads from many sources, such as extra storeys, eccentric loads, and greater living loads. This is why it is now standard practice to place horizontal reinforcements under footings in order to increase the bearing capacity of loose-dense sand subgrades. Both the vertical settlement and the horizontal movement of the soil beneath the selected loaded footing may be mitigated by grouting the perimeter of the footing. This research aims to evaluate the effectiveness of a circular foundation sitting on granular soil injected with grout diaphragm walls by conducting comprehensive experimental work on twenty-one (21) soil models. In particular, the relation between the width (b) and length (L) of grouted walls and the bearing capacity of granular soil was examined in this work. According to the findings, a great way to increase the subgrade layer's bearing capacity is to construct grouted wall injection on each side of the current footing. In order to verify the accuracy of the selected computational procedures, two programs were utilized: the 3D PLAXIS program and the 2D Finite Element Program GeoStudio 2018. A circular foundation lying on granular soil has its bearing capacity significantly affected by reinforcement, according to the results, which is in agreement with the experimental observations.