APPLICATIONS to GEOTECHNICAL DESIGN - Marchetti DMT

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INFLUENCE OF PRESTRAININGON DMT RESULTSCC TEST N. 241 IN TICINO SANDJamiolkowski & Lo Presti. Atlanta ISC '98Torino 20 Nov 2001 40
DMT FOR LIQUEFACTION• Factors (SH) making DMT + sensitive tocompaction and + accurate settlements :are known to affect "liquefiability"Jamiolkowski's res. group (S.F. 1985):"reliable predictions [of liquefiability] incomplex stress-history deposits require thedevelopment of some new in situ device [otherthan CPT or SPT] more sensitive to the effectsof past stress and strain histories".• Less disruptive insertion in loose sand1. Enter Kd – get CRR.Then Seed method.RECOMMENDEDCURVE2. or Use Kd with Table:Clean sand is safe againstliquefaction (M=7.5 earthquakes) if Kd > :KDSeismicity of the area a max /g Kd,minNonseismic / 1.7Low seismicity 0.15 4.2Average seismicity 0.25 5.0High seismicity 0.35 5.5Torino 20 Nov 2001 41
Page 1 and 2: THE FLAT DILATOMETER (DMT).APPLICAT
Page 3 and 4: GENERAL LAYOUT of DMTTorino 20 Nov
Page 5 and 6: SOILS that can be TESTED by DMT•
Page 7 and 8: REPRODUCIBILITY of DMTCestari (SGI)
Page 9 and 10: PRESENTATION of DMT RESULTSHOW TO U
Page 11 and 12: Torino 20 Nov 2001 11
Page 13 and 14: Cu at Skeena Ontario CanadaVs Field
Page 15 and 16: Cu at NATIONAL SITE FUCINOKPaZ (m)N
Page 17 and 18: Cu in Recife Clay - BrazilUniv. of
Page 19 and 20: M in ONSOY Clay (NORWAY)Norwegian G
Page 21 and 22: M in Sites in Virginia, U.S.A.Failm
Page 23 and 24: APPLICATION N° 1 SETTLEMENTSby Bou
Page 25 and 26: DMT-calculated vs observedSETTLEMEN
Page 27 and 28: Sawada S. and Sugawara N. (1995) "E
Page 29 and 30: CLAYc u = undrained strengthg T = u
Page 31 and 32: DISTORTIONS due to INSERTIONCONEOK
Page 33 and 34: DMTbefore-after for Compaction Cont
Page 35 and 36: FLAT SHAPE MORE REACTIVE TOSTRESS H
Page 37 and 38: a= Mdmt/Qc increases with OCR.Hence
Page 39: INFLUENCE OF PRESTRAININGON DMT RES
Page 43 and 44: Examples of Kd » 2 in SLIP SURFACE
Page 45 and 46: DMT for FEM Input PARAMETERSŒSimpl
Page 47 and 48: g - RANGE of MODULUS by DMTMayne -
Page 49 and 50: Often most of settlement in g >0.05
Page 51 and 52: Is MDMT an "operative modulus"?MDMT
Page 53 and 54: Why Difficult to get Operative Modu
Page 55 and 56: When use S-DMT : 2 points in G-g?Fr
Page 57: FINAL REMARKSIf purpose is to profi

APPLICATIONS to GEOTECHNICAL DESIGN - Marchetti DMT

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