Ground improvement with jet grout technique in fine grained soils and optimisation of feasibility

In today's world excessive increase in world population and necessity of constructing new structures makeground improvement menthods widespreadly important for all Civil Engineers. Because of these reasons improving the properties of ground for construction becomes an obligation. Civil Engineers invented many ground improving techniques in last decades.Jet grout ground improving method widespreadly used in out country and in the world. Briefly jet grout method is apllied to the ground by lowering the tijs which are connected to the jet grout drilling machine. By the help of the tijs and nozzle on the tijs high pressure cement grout send to the ground level where the improvement will be carried out. Tijs are pulled upward with a constant speed to form the jet grout column. In the scope of this MSC.study, jet grout ground improvement technique will be explained with; usage area, types of jet grouting, literature review of jet grouting and applicability titles. In addition to these titles, jet grout technique will be compared withanother ground improving method bored pile in costwise, person/hour values and feasibility. Method and materials composed of 2 parts which are; First of all, comparing the ground improvement of the housing project in Afyonkarahisar and the ground values before and after the production, time analysis and cost analysis. Secondly,at the Afyonkarahisar project time and cost analysis for different diameter, pile length and jet grout type for constant pile bearing capacity.