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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 <br /> (q�), sleeve friction {fs) �eaphones <br /> and dynamic pore water pressure (VS&I VP) — <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 I - Soil seal <br /> performed in real time facilitating on- <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 Frlctin Sleeve <br /> 5778-95) Inclinometer <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 0mm thick The filter element is f — Water Seel <br /> used to obtain dynamic pore Soil seal <br /> pressure as the cone is advanced as f <br /> well as Pore Pressure Dissipation y Pore Pressure <br /> Tests (PPDT's) during appropriate 1 ' Transducer (uQ) <br /> pauses in penetration It should be Tip load cell,,, Filter <br /> i� <br /> noted that prior to penetration, the <br /> element is fully saturated with silicon Cone Tip (q�) <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 />