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ADVANCED EARTH SCIENCES VFDOTHILL SANITARY LANDFILL <br />SINGLE INTERFACE DIRECT SHEAR TESTING (ASTM D 5321) <br />Upper Shear Box: Concrete sand <br />Wetted GSE 300E double sided geocomposite #131465785 with outside (net strands parallel to MD) down against <br />Wetted GSE 60 -mil B/B textured HDPE geomembrane (# 108181792, upper surface wetted by spraying water) <br />Lower Shear Box: Concrete sand <br />8000 <br />7000 <br />6000 <br />C <br />¢ 5000 <br />4000 <br />1. <br />ea <br />s 3000 <br />2000 <br />1000 <br />0 <br />3A 3B 3C 3D 3E <br />0.0 0.8 1.6 2.4 3.2 <br />Displacement (in.) <br />15000 <br />12000 <br />Shear Strength <br />Parameters2> <br />6 <br />(deg) <br />a R <br />(psf) <br />Peak <br />23 <br />400 0.990 <br />LD <br />10 <br />360 0.970 <br />O Peak <br />s 9000 ❑ LD <br />ULinear (Peak) <br />Linear (LD) <br />R 6000 <br />5i <br />3000 <br />0+ <br />0 <br />3000 6000 9000 12000 15000 <br />Normal stress (psf) <br />Test <br />No. <br />Shear <br />Box Size <br />in. x in. <br />Normal <br />Stress <br />s <br />Shear <br />Rate <br />in./min <br />Soaking in Distilled Water Consolidation Lower Soil Foundation Soil <br />Stress Time Stress Time Yd cni (Of Yd w; (Ofwi <br />s hour s hour c % I % c % % I <br />GCL Shear Strength <br />(Of TP TLD <br />% % s s <br />Failure <br />Mode <br />3A <br />12 x 12 <br />1000 <br />0.2 <br />1000 16 <br />3B <br />12 x 12 <br />4000 <br />0.2 <br />4000 16 <br />2235 1154 <br />3C <br />12 x 12 <br />6000 <br />0.2 <br />6000 16 <br />3013 1477 <br />3D <br />12 x 12 <br />8000 <br />0.2 <br />8000 16 <br />3794 1735 <br />3E <br />12 x 12 <br />12000 <br />0.2 <br />12000 16 <br />5243 2280 <br />1) <br />NOTES: <br />(1) ) Sliding (shear failure) occurred at the interface between the geocomposite and textured geomembrane. <br />(2) The reported total -stress parameters of friction angle and adhesion were determined from a best -fit line drawn through the test data. Caution should be exercised in using these strength parameters for <br />applications involving normal stresses outside the range of the stresses covered by the test series. The large -displacement (LD) shear strength was calculated using the shear force measured at the end of the test. <br />DATE OF REPORT: 6/16/2015 <br />FIGURE NO_ B-3 <br />PROJECT NO. SGI14012 <br />-! DOCUMENT NO. <br />FII,F. NO. <br />