IMPACT OF CAVITATION WITHIN THE HOMOGENOUS SOIL UNDER HYDRAULIC STRUCTURE ON FORMULATION OF THE SEEPAGE QUANTITY AND UPLIFT PRESSURE

This study aims to investigate the effect of single cavity when it presence at a specific location within the homogenous soil, on the behavior of seepage and uplift pressure under a hydraulic structure. The results are analyzed to introduce deterministic formulae for calculating the amount of seepage and the uplift pressure head. The work was done in three stages by using experimental investigation; the first stage includes 36 models of 75mm in diameter cavity, while the second and the third stages includes eight models for each with 100mm and 34mm diameter of cavity, respectively. The results shows that, when the cavity presence at the left side its impact was positive on the seepage behavior. While the influence was changed to a negative impact when the cavity presence at the right side, except at some specific locations. The statistical software has been employed to generate the two deterministic formulae, and the results of multiple regressions are checked by statistical indices for the purpose of recognizing the reliability of the proposed formulae