《基坑开挖支护》PPT课件

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1、ApplicationofPFC3Dfordeterminationofsoilpropertiesandsimulationoftheexcavationprocessinfrontofsheetpilewallconstructions12Content-Reproduciblenumericalsoilproperties-BallparametersforspecificsoilsSimulationoftheexcavationprocessinfrontofsheetpilewallconstructions-unsupported-

2、singlesupported-singlesupportedwithaplastichinge-Conclusions3Reproducibilityofsoilparameters1.Reproducibility2.Ballparameters3.Sheetpilewallsimulations4.Conclusions(porecontentandinnerfrictionangleofgranularsoils)W/H/D=4.70/3.00/0.60mW=H=D=2.14msoilballsd=0.20m4Reproduciblepo

3、recontentslendercontainermeanporecontent=0.4011variationcoefficient=0.0191.Reproducibility2.Ballparameters3.Sheetpilewallsimulations4.Conclusionssquarecontainermeanporecontent=0.4016variationcoefficient=0.0055Reproducibleinnerfrictionangleatrestslendercontainermeaninnerfricti

4、onangle=26.3°/27.1°variationcoefficient=0.148/0.230k0=2E0/(h2t)k0=1–sin1.Reproducibility2.Ballparameters3.Sheetpilewallsimulations4.Conclusionssquarecontainermeaninnerfrictionangle=32.3°/32.0°variationcoefficient=0.053/0.0596Reproducibilityporecontent1.Reproducibility2.Ball

5、parameters3.Sheetpilewallsimulations4.ConclusionsinnerfrictionangleForlowstochasticeffectsontheresults:15ballsinarowmathematicallyononeconfiningwall.7Ballparametersat1glevelgranularsoils:=30°-40°;n=0.400balldiametersd=2mm-20cmcubiccontainerswalllengths15xd-25xdslendercontain

6、erswalldepths15xdheights&lengthsof25xd-30xd1.Reproducibility2.Ballparameters3.Sheetpilewallsimulations4.Conclusions8Cubiccontainer15xd;=30°;n=0.400pouringandrestks_pour=715.18br2.0259sf_rest=0.30–0.35sf_pour=0.21.Reproducibility2.Ballparameters3.Sheetpilewallsimulations4.Con

7、clusionsnks_act=1E5kN/msf_act_move=0.40–0.45activeearthpressure9Cubiccontainer15xd;=30°-40°;n=0.400[°]sf_rest[-]sf_act_move[-]ks_act[kN/m]300.30–0.350.40–0.458E4–5E5350.60–0.700.90–1.108E4–2E5404.5–6.03.5–4.58E3–2E5sf_rest=0.00009e0.2659sf_act_move=0.0006e0.2185ks_act=1E5

8、kN/m1.Reproducibility2.Ballparameters3.Sheetpilewallsimulations4.Con