CHAPTER ONE

1.0     INTRODUCTION

Engineering geology is the application of geologic science to engineering practice for the purpose of assuring that the geologic factors affecting location, design, construction operation such as road construction building construction, dam and bridge construction and it maintenance are recognized and are adequately provided for (Ige, 2011).      Soil can be defined as the upper layer of the ground made up of unconsolidated material produced due to weathering agencies which acted on the rocks. It can also be referred to as ‘’TERRAFIRMA’’ meaning solid ground; a good base for road, building and all kind of structures project (Gidigasu, 1972).         The engineering approach to this research project will focus on the characteristics of soils as construction materials and their suitability to withstand loads applied by structures of various types. A good understanding of the engineering geological properties of the soil around Akungba-IKare Akoko area of Ondo State, Southwestern part of Nigeria will aid quality construction project.        Soil samples responded differently to various geotechnical tests or engineering tests they are subjected to and this will give an insight to the suitability of the soil. Lack of information would affect the suitability and performances of any engineering structure. This Research project work will deals with the geological investigation on some soil around Akungba- Ikare Akoko area in order to determine their usefulness for construction material.     

1.1            Location and the extend of the study area

The area of study, Akungba-Ikare Akoko road is located in the northern part of Ondo State. The area lies between latitudes 070.27’N and 070.31’N   and longitudes 0050.43’E and 0050.47’E Greenwich Meridian (figure 1.1 and figure 1.2). Akungba-ikare Akoko area is moderately populated and it is surrounded by settlement such as Ogbagi, Iwaro Oka, Ugbe Akoko.

1.2 Aim and Objectives of the Research project work.

The aim of this geologic study is to determine the engineering geological properties of some soil developed over the metamorphic rock in the study area, thereby accessing its strength, stability and suitability for the purpose engineering constructions.

Objectives

(1) To determine the nature, and the strength of the geological material based on the component of construction materials (2) It will provide some relevant information about the engineering properties of soil in the study area. (3) To determine the suitability of the soil for construction purposes.  

1.3            Previous work/ Literature Review

Many research works had been carried out in the past on the engineering properties of subgrade soils in some parts of Ondo state and other parts of the country by different researchers, but the engineering geological investigation of some soils over metamorphic complex along Akungba-Ikare Akoko is the first of its kind in this area. Notable among these works are the works of Adeyemi 2000, Jegede 1998 and Gidigasu 1997. Most of these workers attributed pavement failure to poor subgrade material /fill soils.

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