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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 fraction sleeve area <br /> of 225 cm2 The cone is designed with an equal end area faction sleeve and a <br /> tip end area ratio of 0 85 <br /> The cone takes measurements of <br /> cone bearing (q„), sleeve friction (f9) Geophones r�� <br /> and dynamic pore water pressure (yS&Vp) <br /> (uz) at 5-cm intervals during <br /> penetration to provide a nearly W Push rod <br /> continuous hydrogeologic log CPT /^ Connector <br /> data reduction and interpretation is — 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 I -- Friction load cell <br /> revised (2002) ASTM standards (D Frictin sleeve <br /> 5778-95) Inclinometer <br /> The cone also contains a porous Qx&y) <br /> filter element located directly behind Tip load cell ��♦ <br /> the cone tip (uz), Figure CPT It <br /> consists of porous plastic and is I <br /> 5 0mm thick The filter element is Water Seal <br /> used to obtain dynamic pore Soil seal <br /> pressure as the cone is advanced as <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 / f <br /> � ��- Filter <br /> noted that prior to penetration, the <br /> ., Cone Tip (qc) <br /> element is fully saturated with silicon <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 tremie pipe is pulled from the hole Disruption or <br /> further contamination to the site is therefore minimized <br />