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APEGG Cone Penetration Testing Procedure <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 /> ' 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 friction sleeve and a <br /> tip end area ratio of 0 85 <br /> The cone takes measurements of <br /> ' <br /> cone bearing (qj, sleeve faction (fs) GeophoneS <br /> and dynamic pore water pressure (V5&VP) <br /> (u2) 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 <br /> ' performed in real time facilitating on- �- Sall Seal <br /> site decision making The above Electric cable for <br /> mentioned parameters are stored on signal transmission <br /> ' disk for further analysis and <br /> Water Seal <br /> reference All CPT soundings are <br /> performed in accordance with Friction load cell <br /> ' • revised (2002) ASTM standards (D Frictin sleeve <br /> 5778-95) Inclinometer <br /> ' The cone also contains a porous OX&p <br /> filter element located directly behind Tip load cell <br /> the cone tip (u2), Figure CPT It <br /> consists of porous plastic and is <br />' 5 0mm thick The filter element is Water Seal <br /> used to obtain dynamic pore <br /> pressure as the cone is advanced as IM 7-7 <br /> Soil seal <br />' well as Pore Pressure Dissipation Pore Pressure <br /> Tests (PPDT's) during appropriate Transducer (u2) <br /> Tip load cell ; ,, <br /> pauses in penetration It should be Filter <br /> noted that poor to penetration, the <br /> element is fully saturated with silicon Cone Tip (qc) <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 /> • 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 />