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t <br /> EGG <br /> Cone Penetration Testing Procedure <br /> (CPT) <br /> Gregg In Situ, Inc carnes 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 /> cone bearing (qj, sleeve friction (f,) Geophones <br /> and dynamic pore water pressure (ys&V ) C <br /> (u2) at 5-cm intervals during P <br /> penetration to provide a nearly Push rod <br /> jcontinuous hydrogeologic log CPT Connector <br /> data reduction and interpretation is <br /> performed in real time facilitating on- Soil seal <br /> site decision making The above Electric cable for <br /> mentioned parameters are stored on signal transmission <br /> disk for further analysis and Water Seal <br /> ► reference. All CPT soundings are Friction <br /> performed in accordance with Sleeve Friction load cell <br /> ' revised (2002) ASTM standards (D <br /> 1, 5778-95) XInclinometer <br /> The cone also contains a porous <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 Omm thick. The filter element is 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 /> Tests (PPDT's) during appropriate Transducer(u,) <br /> pauses in penetration. It should be Tip load Cell <br /> Filternoted that prior 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 GpT <br /> When the soundings are complete, the test holes are grouted using a Gregg In <br /> Situ support ng. 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 />