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EGG Cone Penetration Testing Procedure <br /> r <br /> (CPT) <br /> Gregg In Situ, Inc carries out all Cone Penetration Tests (CPT) using an <br /> integrated electronic cone system, Figure CPT The soundings were conducted <br /> I using a 20 ton capacity cone with a tip area of 15 cm2 and a friction sleeve area <br /> of 225 cm2 The cone is designed with an equal end area fnchon sleeve and a <br /> tip end area ratio of 0 85 <br /> The cone takes measurements of <br /> cone bearing (q.), sleeve friction (1$) Geophones t <br />' and dynamic pore water pressure (VS&VP) C' <br /> (u1) at 5-cm intervals during <br />' penetration to provide a nearly Push rod <br /> Connector <br /> continuous hydrogeologic log CPT <br /> data reduction and interpretation is V SOIL seal <br />' performed in real time facilitating on <br /> site decision making The above ;' Electric cable for <br /> mentioned parameters are stored on ; f ;� signal transmission <br />' disk for further analysis and Water Seal <br /> reference All CPT soundings are <br /> performed in accordance with f Friction load cell <br /> 10) M <br /> revised (2402) ASTstandards (D Frictin sleeve <br /> 5778-95 <br /> ,, ; * Inclinometer <br /> F Ox&) <br /> The cone also contains a porous Ti load Cell <br /> Ater element located directly behind p <br />' the cone tip (u2), Figure CPT. It <br /> consists of porous plastic and is f <br /> 5 0mm thick The filter element is <br />' Water Seal <br /> used to obtain dynamic pore <br /> pressure as the cone is advanced as Soil seal <br /> well as Pore Pressure Dissipation Pore Pressure <br /> 1 Tests (PPDT's) during appropriate Transducer (ug) <br /> pauses in penetration It should be Tip load cell Filter <br />' noted that prior to penetration, the <br /> element is fully saturated with silicon Cone Tip (4�) <br /> oil under vacuum pressure to ensure <br />' accurate and fast dissipation Figure CPT <br /> When the soundings are- complete, the test holes are grouted using a Gregg In <br />' Situ support rig The grouting procedure consists of pushing a hollow CPT rod <br /> �1 with a "knock out" plug to the termination depth of the test hole Grout is then <br />' pumped under pressure as the tremae pipe is pulled from the hole Disruption or <br /> further contamination to the site is therefore minimized <br /> 1 <br />