EFFECT OF GROUT DEPTH VARIATION ON THE BEARING CAPACITY OF THE IRAQI SANDY SOIL

In the present work, improving the behavior of a strip footing rested on the sandy soil before and after the permeation grout by cement was studied and also how the variation grout depth hole with the water - cement ratio effecton the soil bearing capacity. So, improving the shear strength of the sandy soil also studied by injected (1) cm³ of slurry in the center of the direct shear box. Sandy soil was improved by using cement grout with three weightpercentages of water cement ratio (w:c); (0.9w:0.1c, 0.8w:0.2c, and 0.7w:0.3c), while the sand was obtained from Karbala city and it will be classified as poorly graded sand (SP) according to USCS. To know thevalue of the bearing capacity of grouted soil with the selection pattern of grout hole , the static load – settlement tests were done, while three grout hole depth was used (0.5B,B,2B) for all (w:c). For all tests, the soil sampleswere dehydrated for one day curing time. According to the results of tests, the shear strength of the treated soil with cement grout was increased when the water cement ratio decreased, and when the grout hole depth was decreased and the water – cement ratio increased, the value of the bearing capacity will be increased as a result sedimentation.

کلیدواژه ها:

Soil Improvement ، Grouting With Cement ، Strip Footing ، Grout Hole Depth