《基坑开挖支护》PPT课件.ppt

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1、Application of PFC3D for determination of soil properties and simulation of the excavation process in front of sheet pile wall constructions,1,2,Content,-Reproducible numerical soil properties,-Ball parameters for specific soils,Simulation of the excavation process in front of sheet pile wall constr

2、uctions-unsupported-single supported-single supported with a plastic hinge,-Conclusions,3,Reproducibility of soil parameters,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,(pore content and inner friction angle of granular soils),W/H/D=4.70/3.00/0.60 m,W=H=D=2.14 m,s

3、oil balls d=0.20 m,4,Reproducible pore content,slender container,mean pore content=0.4011,variation coefficient=0.019,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,5,Reproducible inner friction angle at rest,slender container,k0=2 E0/(h2 t)k0=1 sin,1.Reproducibility

4、 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,6,Reproducibility,pore content,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,inner friction angle,For low stochastic effects on the results:15 balls in a row mathematically on one confining wall.,7,Ball

5、parameters at 1g level,granular soils:=30-40;n=0.400,ball diameters d=2 mm-20 cm,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,8,Cubic container,15 x d;=30;n=0.400,pouring and rest,ks_pour=715.18 br 2.0259,sf_rest=0.30 0.35,sf_pour=0.2,1.Reproducibility 2.Ball param

6、eters 3.Sheet pile wall simulations 4.Conclusions,9,Cubic container,15 x d;=30-40;n=0.400,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,10,ball parameters,n=0.400,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,Applicability of determ

7、ined formulas demonstrated at systems deviating from examined ones!,11,Sheet pile wall simulation,-Slender container W/H/D=16.95/10.78/0.70 m,-3 Pentium IV(2.4-2.7 GHz)computers in parallel,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,12,Sheet pile wall simulation-

8、unsupported,excavation depth 1.0 m,2.0 m,3.0 m,3.6 m,4.0 m,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,13,Sheet pile wall simulation-unsupported,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,14,Unsupported sheet pile wall regularl

9、y packed,tetragonal spatial centered,y,x,y,z,excavation 4.0 m,excavation 4.5 m,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,15,Unsupported sheet pile wall regularly packed,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,Sheet pile wa

10、ll simulation-supported,16,excavation depth 3.0 m,4.0 m,5.0 m,6.0 m,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,17,Sheet pile wall simulation-supported,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,Sheet pile wall simulation-suppo

11、rted&plastic hinge,18,excavation depth 4.0 m,5.0 m,6.0 m,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,Sheet pile wall simulation-supported/elastic-plastic,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,19,20,Sheet pile wall simulati

12、on-supported/elastic-plastic,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,21,Conclusions,Ball parameters for different soils and container geometries determined,Simulation of excavation processes in front of sheet pile wall constructions,with an insight into the so

13、il,Influence of plastic hinge in sheet pile wall on earth pressure studied for first time without artificial weakening of wall or hydrostatic water pressure-same excavation depth can be reached with a weaker profile when taking the moment-rotation-behavior into account,15 balls per wall length,1.Reproducibility 2.Ball parameters 3.Sheet pile wall simulations 4.Conclusions,