| Abstract | Kandahar is the second largest of thirty-four provinces of Afghanistan .As Kandahar province is moving towards development causes many constructions, it is very important to be educated about foundation engineering. The project site has a continental warm semi-arid climate characterized by little precipitation and high variation between summer and winter temperatures.Kandahar city located between three streams, Arghandab at the west,Tarnak at the east, Dorai at the north and the side of mountains, North-South (Kotal-e-Murcha to Bala karaz) (10.6KM) and East-West (Nasajee to Bagh-e-pul) (26.3 KM) and I have studied the soil, in five key areas, Kandahar university media centerat the north, Amery Plaza at the center, Ayno Mina at the east, Merwaise Mina at the west and airport at the south of the city.There are three types of soil deposit exist in Kandahar city alluvial deposits, Colluvium or gravity deposits and Wind-deposited sands are known as dunes.The grain size studies were done on soil samplesaccording with ASTM D-422, the classification examination consequences based on Unified Soil Classification System. (USCS), pinpoint that the soil mostly include GM, GP, GC ,GP-GM ,GW , GW-GM , GM-GS , SW, SP, SM, SC and GS-GC up to the investigated depth.Tests results shows low, plasticity of Kandahar city medium to high, relative densities of all sites soil are dense, Specific gravities and dry densities are acceptable. Optimum water content percentage is from 4.16 to 10.2.The angles of internal frictions range from 26° to 32° and cohesions are from 0.02 to 0.14 kg/cm2. From16° to 22° and cohesions are 0.025 to 0.035 kg/cm2, 18° and cohesions are 0.03 kg/cm2, from 26° to 32° and cohesions are 0.00 kg/cm2,from 20° to 30° and cohesions are from 0.0018 to 0,034 kg/cm2 Shear strength tests were performed from media center, AynoMaina, Amery plaza, army conversion and fruit market sites respectively. |