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m9 9 EGG Cone Penetration Testing Procedure <br /> (CPT) <br />' Gregg In Situ, Inc carnes 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 />' <br /> cone bearing (qj, sleeve friction (fl) Geophones <br /> and dynamic pore water pressure (VS&VP) 0 <br /> (u2) at 5-cm intervals during I� <br />' penetration to provide a nearly Posh rod continuous hydrogeologic log CPT - connector <br /> f <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 , Faction load cell <br /> revised (2002) ASTM standards (D Frkctin sleeve <br /> 5778-95) Inclinometer <br /> The cone also contains a porous Ti load cell <br /> filter element located directly behind p ' <br /> the cone tip (uz), Figure CPT. It <br /> consists of porous plastic and is ; <br /> 5 0mm thick. The filter element is r Water Seal <br /> I 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 Tiload Cell Transducer (u,) <br /> pauses in penetration It should be p filter <br /> noted that prior to penetration, the <br /> element is fully saturated with silicon Cane Tip (q�) <br />' oil under vacuum pressure to ensure <br /> accurate and fast dissipation F'�"Je LST <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 ouf 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 />