International Journal of Research and Scientific Innovation (IJRSI) | Volume VII, Issue II, February 2020 | ISSN 2321–2705 www.rsisinternational.org Page 29 Experimental and Numerical Study of Reinforced Silty Clay Soil in Delta Khaled M. M. Bahloul Lecturer, Department of Construction Engineering, October High Institute of Engineering and Technology, Egypt Abstract:-Soil reinforcement is a recent and special field of soil improvement. It covers a range of techniques, which consists of placing inclusions in soil. The most studies devoted partly or totally the behavior of foundation on reinforced subgrade without regarding the basic characteristics of the reinforced soil. So, the paper presents an experimental investigation into the mechanical and compressibility properties of the reinforced silty clay samples by jute cloth Geotextile (JGT) at intermediate depth, also, the paper studied numerically the effect of JGT reinforcement on the bearing capacity of footing on silty clay soil using Plaxis software. The effects of the reinforcement on shear stress and shear failure were studied. The results indicated that the presence of such reinforcement has a considerable effect in increasing the shear strength of the reinforced samples, decreasing compressibility and increasing bearing capacity of foundations constructed on reinforced soil. Keywords: Soil reinforcement, Jute cloth geotextile, Shear stress, Shear parameters, Compressibility, Bearing capacity, Plaxis. I. INTRODUCTION ecently there has been a strong demand for the use of Geotextiles for improving mechanical properties of cohesive soils. Because these properties played important role in determination of the bearing capacity and settlement under foundations. Also, it were used in a wide range in computer programs. The bearing capacity problems of different foundations on reinforced soils are getting wider day by day with advent of the researchers to improve the foundation soil conditions. The techniques of soil reinforcement were done by including new materials into the soil in various forms as Multi membrane and grid which, including fabrics as geogrid, geocel and commonly geotextiles. The geotextile membrane can withstand only tensile forces. The most important kinds of fabrics are geotextile and geogrid. Geotextile is the name now universally adopted for fabrics used in geotechnical engineering. They have been used extensively in reinforcement of soil for foundation uses. For more than a decade geotextile fabrics have been used for subgrade stabilization of soft foundation soils. Applications of fabrics in civil engineering have been successfully developed and offer benefits in terms of economics, durability and performance. Fabrics play important role in geotechnical engineering works, especially highway and railroad, reinforced soil, stabilization of soil or rock slopes, drainage control, embankment, dams, and tunnels. Fabrics are now commonly used as reinforcement material to improve the load bearing of various soils, soft soil and weak soils. The mechanism of load bearing of soil reinforcement with reinforcement depends on the interface friction between the reinforcement and the soil. Fabrics are also used as a reinforced material with earth structure. Otherwise, the use of fabric is one of the effective means of stabilization poor soils where they are used worldwide in many areas of civil engineering works. Geosynthetics are now commonly used in many civil engineering applications and especially in solid and liquid hazardous waste containment and municipal landfills. Much work has been carried out during the past decades on the behavior of the reinforced earth retaining wall e.g.[1]. The application of soil reinforcement for improving the bearing capacity and the load settlement response of the foundations, the base for pavements and embankments on soft soil were studied.[2], proved that the presence of tensile reinforcing strips under footing increases and improves the bearing capacity of supporting soil and decreases the stress over weak layer.[3], [4],[5-6], [7], studied the method of improving the bearing capacity of footing model resting on sand subgrades reinforced by a variety of reinforcement. While [8-9]studied the application of the composite fabrics on soft ground and reinforced soil structure without determination of the mechanical or any characteristics of reinforced soil. For extent[10] and [11] explained the improvement of the bearing capacity of strip footing by using geosynthtic reinforcement placed in horizontal manner. [12] investigated the suitability of using some natural material as reinforcement for sand. Generally, the basic concept of Reinforced Earth material is presented. This material results from the association of the two components having different moduli of elasticity. A stress applied to the mass will cause strain in the soil that will transmit the tensile load to the strips. The displacements are restrained in the direction of the strips causing the reinforced mass to behave like a cohesive anisotropy material. Hence, the concept of Reinforced Earth is based on a frictional earth-reinforcement interaction. The last mentioned papers describe the results of the loading tests on a Varity of horizontal reinforced layers beneath the footing. It deals with the study the effect of the existence of reinforcement on the bearing capacity of any footing without considering the effect of the existence such reinforcement on the mechanical properties of the tested soil. So, the present paper aims to study and evaluate both the mechanical characteristics of reinforced alluvium soil in central delta by a R