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EGG 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 /> cone' bearing (q j, sleeve friction (f$) Geophones �- <br /> and dynamic pore water pressure (VS&V) L <br /> (u2) at 5-cm intervals during <br /> penetration to provide a nearly Push rod <br /> continuous 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 <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 as <br /> orou OX&p <br /> 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 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 (u2) <br /> pauses in penetration It should be Tip load cell <br /> Filter <br /> noted that prior to penetration, the <br /> element is fully saturated with silicon Cone Tip (qc) <br /> oil lander 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 tremie pipe is pulled from the hole Disruption or <br /> further contamination to the site is therefore minimized <br /> I <br />