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1 <br /> 12 1"GGEGG 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 <br /> cone takes measurements of _ <br />' cone bearing (q.), sleeve friction (fl) Geophones <br /> and dynamic pore water pressure (VS&VP) C <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 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 <br /> reference All CPT soundings are Water Seal <br /> performed in accordance with Friction load cell <br /> lie 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 self <br />' the cone tip (u2), Figure CPT It <br /> consists of porous plastic and is <br /> I 5 0mm 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 appropnate Transducer (u,) <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 {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 tremie pipe is pulled from the hole Disruption or <br /> further contamination to the site is therefore minimized <br /> I <br />