A Review study on foundation above the soil containing voids; challenges and obstacles
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Abstract
Foundations constructed on sandy soils that contain underground voids or cavities often face significant geotechnical challenges. Underground cavities occur as the results of natural causes, manmade causes or sometimes a complex combination of both. Despite considerable research on foundation performance in soluble soils, the effects of cavity geometry specifically, cavity depth and horizontal position relative to foundation centers and load eccentricity on the bearing capacity This paper discusses an extensive survey on the previous investigations the challenges and obstacles on the conducted foundations conducted on soil containing voids footing not fully understood. Various factors were considered effect of void size, depth, void location relative to the foundation. These studies have effectively shown that the presence of voids directly affects soil behavior, leading to reduce shear strength, decrease bearing capacity, and increase settlement, which can cause sudden failures. The greatest impact occured when the voids were located within the critical zone below the foundation, while their effect decreased with increasing depth or horizontal distance.
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