IMPROVEMENT OF BEARING CAPACITY OF SANDY SOIL BY GROUTING
ABSTRACT
This project work is on improvement of bearing capacity of sandy soil by grouting. The sample was collected along Iree-Obagun road and subjected to various tests such as Compaction test, California Bearing Ratio (CBR), Atterberg Limit Test, Liquid Test, Plastic Limit Test, and Sieve Analysis Test. In relation to the subject matter, view of some scholars and authors were reviewed and the data collected which are presented and analyzed accordingly. Conclusion and recommendation are made at the end of this research. However, the research work is not on itself as it is recommended for further studies.
CHAPTER ONE
INTRODUCTION
The construction of structure on weak ground oen requires the soil to be improved in order to ensure the safety and the stability of surrounding buildings. The ground improvement in granular soils can be achieved by dierent
methods such as vibro-floatation, compaction piles, and compaction with explosives, excavation and replacement, grouting e.t.c. The selective of the most suitable method depend on a variety of factors, such as: soil conditions, required degree of compaction, types of structure to be supported, as well as site specific considerations available time for completion of the project, availability of equipment and materials e.t.c.
Soil compaction can effective solutions for many foundation problems and his especially useful for reducing total settlement in sand. Sandy soil means most of the soil particles are bigger than 2mm in diameter. It gives good water drainage and has a low capacity to hold nutrients. Sandy soil does not hold moisture very well. It is granular and consists of rock and mineral particle that are very small. Therefore, the texture is gritty and is
formed by the disintegration and weathering of rocks such as limestone, granite, quartz and shale. Is also easier to cultivate it if it is rich in organic materials but then it allows drainage more than needed. This results in over drainage and dehydration of the plant in summer. It warms very fast in the spring season. Grouting on the other hand is a process whereby stabilizes either in the form of suspension or solution is injected into sub surface soil. Sandy soil is the largest particle in the soil when you rub it, if feels rough. This is because it has sharp edges and it does not hold many nutrients.
