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FIGURE 4 <br /> ELASTIC SOLUTION DIFFERENTIAL SETTLEMENT MODEL (3 <br /> ) <br /> T <br /> D <br /> Three u-imensional elastic solution model of sloping surface over a void. <br /> ZO <br /> 1.8 0 <br /> c <br /> a 1.6 <br /> v 1.2 O <br /> C o I <br /> r•. 1.0 - - - - - - - - — <br /> = ® 0.8 <br /> EE .0.6 0 <br /> ° 0.4 <br /> 0.2 ®0 i <br /> 0.0 '° ' <br /> 0.0 0.2 0.4 0.6 0.8 1.0 1.2 <br /> Ratio of Void Width to Controlled F11 Thickntsa (L/T) <br /> Maximum tensile strain verses ratio of void width/rill thickness over 0.9m x <br /> 0.9m x 1.8m (3'x3'x6') void. <br /> 5.0 <br /> E l <br /> v £ 4.0 <br /> C 0 <br /> v 3.0 O <br /> o .0 <br /> V 00. <br /> o O <br /> cr O�_ <br /> c 1.0 S �LJP� O <br /> N <br /> v <br /> 0.0 e <br /> 0 5 t0 15 20 25 30 35 40 <br /> Cont®inmont Untr Grade (dogrtt) <br /> Required fill thickness (T) to prevent grade reversal verses liner grade over <br /> 3'x'3'x6' void. <br />