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This software is licensed to: Kehoe Testing and Engineering
<br />Presented below is a list of formulas used for the estimation of various soil properties. The formulas are presented in SI unit system and assume
<br />that all components are expressed in the same units.
<br />:: Unit Weight, g (kN/ma) x ::Small strain shear Modulus, Go (MPa)
<br />g = gw ·0.27 ·log(R,) + 0.36 ·log(24+1.236 Go =(qt -ov).0.0188·10*55·19+1.68
<br />Pa
<br />where gw = water unit weight ::Shear Wave Velocity, Vs (m/s) ::
<br />:: Permeability, k (m/s) ::
<br />Ic < 3.27 and Ic > 1.00 then k =10 0.952-3.04·4 (52<,0.50
<br />Ic s 4.00 and Ic > 3.27 then k = 10 4.52-1.37·4 ::Undrained peak shear strength, Su (kPa) ::
<br />Nkt = 10.50 +7· log(Fr )or user defined
<br />": Nspr (blows per 30 cm) ::s I (qi - o.)Ne=(2(1. 1 u NktC F, 7 10 1.1268-0.2817·4 (applicable only to SErrn: 1,2,3,4 and 9 or Ic > Ic_cuto")
<br />1
<br />:: Remolded undrained shear strength, Su(rem) (kPa) ::N'(60) = (41 . 10 1.1268-0.2817 4
<br />:: Young's Modulus, Es (MPa) ::
<br />Su(rem) = fs (applicable only to SBL: 1,2,3,4 and 9
<br />or Ic > Ic_cuton)
<br />(qt-ov)·O.015·10 0.55·4+1.68 :: Overconsolidation Ratio, OCR ::
<br />(applicable only to Ic < Ic_cuton)no.20k - F T - or user defned
<br />OCR-[0.25·(10.50·+7·bg(Fr)):: Relative Density, Dr (%) ::
<br />OCR = kocR - Qtn
<br />100 ·,1-21.1 (applicable only to SBL: 5,6,7 and 8
<br />or Ic < 4_cutom)(applicable only to SHTn: 1,2,3,4 and 9 or Ic > Ic_cutor,)V kDR
<br />:: State Parameter, 41 :: ::In situ Stress Ratio, Ko
<br />43 = 0.56 - 0.33 ·log(Q m,cs)Ko =(1- she') ·OCR*'.1
<br />(applicable only to SK : 1,2,3,4 and 9 or Ic > Ic_cutorr)
<br />:: Peak drained friction angle, ip (°) x
<br />cp=17.60+11·bg(Q tn) ::Soil Sensitivity, St ::
<br />(applicable only to SBA: 5,6,7 and 8)S.=Ni
<br />:: 1-D constrained modulus, M (MPa) ::(applicable only to SBT.: 1,2,3,4 and 9 or Ic > Ic.cuton)
<br />If Ic > 2.20
<br />:: Effective Stress Friction Angle, I (°)::a = 14 for Q ui > 14
<br />a =Qtr, for Qrn £ 14 cp' = 29.5° · B121. (0.256+0.336 · Bq + bgQJ
<br />Mcp·r=a-(qt-ov)(applicable for 0.10<4<1.00)
<br />If Ic £ 2.20
<br />Mcpr=(qt -ov)'0.0188·10 0.554 -1.68
<br />References
<br />• Robertson, P.K., Cabal K.L., Guide to (Zone Penetration Testing for Geotechnical Engineering, Gregg Drilling & Testing, Inc., 5lh Edition, November
<br />7017
<br />• Robertson, P.K., Interpretation of Cone Penetration Tests - a unified approach., Can. Geotech. 1.46(11): 1337-1355 (2009)
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