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Procedure for the evaluation of soil liquefaction resistance, NCEER (1998) <br />Calculation of soil resistance against liquefadion is performed according to the Robertson & Wride (1998) procedure. The <br />procedure used in the software, slightly differs from the one originally published in NCEER-97-0022 (Proceedings of the NCEER <br />Workshop on Evaluation of Uquefaction Resistance of Soils). The revised procedure is presented below in the form of a <br />flowchartl: <br />qc: tip resistance, fs: sleeve friction <br />G,v, 04 : in-situ vertical total and effective stress <br />unils: all in kPa <br />initial stress exponenta :n= 1.0 and calculate Q, R and Ic <br />if Ic s 1.64. n = 0.5 <br />if I.64 < [c < 3.30. n = 0,-1.64)0.3 + 0.5 <br />if ic 2 3.30. n = 1.0 <br />iterate until the change in n. An < 0.01 <br />if am' > 300 kPa. let n = 1.0 for atl soils <br />%pdated from <br />Robertson and <br />Wride f 1998)Cn =:[3]n <br />F = L 100Q= ·C <br />100 (qc - a,o) <br />4 = 3.47 -logQ)2 + (1.22+ logF)2 <br />V <br />if Ic 5 1.64. Kc = 1.0 <br />if 1.64 <Ic< 2.60. Ig = -0.403 44 + 5.581 12 -21.63 1,2 + 33.75 4 - 17.88 <br />if IC 2 2.60. evaluate using other criteria; likely nontiquefiable if F > 1% <br />BUT, J 1.64 < 4 < 2.36 And F < 0.596, sc: Kc = 1 -0 <br />C'cIN)= = KCQ <br />. <br />CRR7.5 =93·(grIN)£0 +0 08. if 50 5 (chIN)cs < 1601000 <br />CRR7 5= 0-833 ·| C'lcINc' .1.0.05, i f (qciN)cs < 50L looo <br />if Ic 2 2.60. evaluate using other criteria; likely nonliquifiableif F > 1% <br />NEstinating liquefaction-induced ground settl efrents from CPT- for level ground", G Zhang, P.K Robertson, and R.W, I. Brachnen <br />Cliq v.1.5.1.16 -CPT Uquefaction Assessment Software 49