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1 <br /> CIREGG Cone Penetration Testing Procedure <br /> (CPT) <br /> ' Gregg In Situ, Inc tames 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 crn2 The cone is designed with an equal end area friction sleeve and a <br /> tip end area rano of 0 85 <br /> ' The cone takes measurements of <br /> ' <br /> cone bearing (q,), sleeve friction (fg) Geaphones <br /> and dynamic pore water pressure <br /> (u2) at 5-cm intervals during �Vs&VP) " <br /> ' <br /> Push rod <br /> penetration to provide a nearly <br /> continuous hydrogeologic log CPT connector <br /> data reduction and interpretation is r <br /> performed in real time facilitating on- r Soil seal <br /> ' site decision making The above ': ;r` Electric cable for <br /> mentioned parameters are stored on signal transmission <br /> ' disk for further analysis and s <br /> Water Seal <br /> reference All CPT soundings are F% <br /> performed in accordance with Friction load cell <br /> ' . <br /> revised (2002) ASTM standards (D Frictlrl 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 (ua), Figure CPT It <br /> consists of porous plastic and is <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 (UQ) <br /> pauses in penetration It should be Tap load cell �� Filter <br /> ' noted 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 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 />