Laserfiche WebLink
what effects this high water table might have on the overall <br />stability and to evaluate the need, i- any, for internal drainage. • <br />The surface through the embankment was estimated by a procedure <br />developed by Casagrande (1937) for flow through a homogeneous dam <br />on an impervious foundation. In this analysis, it is assumed that <br />the water existed at the top of the pile and that it drained to the <br />toe of the embankment similar to flow through a water retention <br />impoundment. <br />A summary of the stability analysis results are presented <br />below, along with the minimum safety factors required by CMLRD <br />regulations. The "foundation" water ~~ondition relates to a ground <br />water table existing at the interface between the pile and the <br />foundation strata while the "pile" condition refers to the water <br />level. As may be seen, the stability of the embankment was found <br />to have an acceptable factor of safety for all loading conditions <br />as established by CMLRD. <br /> Stability Results <br />Failure Water Safety Factor Minimum <br />Surface Condition Calculated Re fired <br />#1 Foundation 1.1 Foundation 2.7 1.5 <br />Interface 1.2 Pile 1.6 1.5 <br />#2 Random 2.1 Foundation 2.7 1.5 • <br />Circle 2.2 Pile 1.6 1.5 <br />As presented above, the stability of the waste pile was <br />found to have an acceptable factor of safety based on the selected <br />strength parameters for the waste material. The actual strength <br />parameters are presented in Exhibit 30. The static and <br />pseudostatic safety factors for the low phreatic surface were 1.87 <br />and 1.59, respectively. The static and pseudostatic high phreatic <br />surface were 1.61 and 1.44, respectively. <br />~~I ~ <br />~I~g <br />2054=.626 2.05-92 revised 10/23/97 <br />