Hydro-Mechanical Properties of an Unsaturated Frictional Material

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184CHAPTER 8. NEW SWCC MODEL FOR SAND INCLUDING SCANNING CURVES sand column tests I. In this way the obtained soil-water characteristic curve models allow to better assess the measurement error and also provide functional form for the scanning curves. Two models were derived: i) Model 1 (see Eq. 8.2) that can be used for drainage or imbibition process and ii) Model 2 (see Eq. 8.3), that is an extension and incorporates hysteresis behavior (scanning curves). Extended regression analysis and validation support the usage of the new soil-water characteristic curve models for the investigated sand.
Chapter 9 Numerical Simulation of Column Test by FEM 9.1 General The investigation presented in the following chapter shows numerical simulations. Boundary value problem is solved and compared to the experimental results. Numerical investigation of drainage as well as imbibition processes of experiments carried out in the sand column I under transient state condition are performed. Two approaches are discussed, that are carried out using suction-water content parameters directly derived from transient state test (sand column test I) and from steady state test (modified pressure plate apparatus), that is classical method for prediction of suction-water content parameters used for numerical investigation. The aim is to find reliable predictions on unsaturated flow including the phenomena of hysteresis and entrapped air, which are found to be significant for the experiments performed in the sand column test I. Therefore following requirements to the numerical simulation are necessary: - Simulation including hysteresis behavior. - Simulation including scanning behavior. - Simulation considering the phenomena of entrapped air. The numerical simulations in this work are carried out with the multi-phase flow module of the numerical simulator MUFTE-UG (Multiphase Flow Transport and Energy model- Unstructured Grids). The balance equations for the two phases are solved fully coupled using on a node-centered Finite-Volume discretization in space, the BOX-scheme (Bastian et al. 1997, Helmig 1997, Huber & Helmig 1999). A backward-difference Euler scheme is applied for the time discretization. The resulting non-linear system of equations is solved with a quasi Newton-Raphson scheme, where the linear system of equations is handled with a BiCGStab (stabilized biconjugate gradient) scheme utilizing a V-multi-grid cycle as pre- and post-smoother. 185
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Hydro-Mechanical Properties of Part
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Acknowledgement The present dissert
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3.2 Steps of Model Building . . . .
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11 Summary and Outlook 205 11.1 Gen
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2.16 Influence of Brooks and Corey
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6.2 Experimental results of soil-wa
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7.17 Unsaturated hydraulic conducti
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B.6 Experimental results and best f
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8.3 Constitutive parameters for the
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E ref ur Oedometer reference stiffn
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ρ Density (g/cm 3 ) ρd ρs Dry de
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2 CHAPTER 1. INTRODUCTION Figure 1.
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4 CHAPTER 1. INTRODUCTION - Model b
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6 CHAPTER 1. INTRODUCTION
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8 CHAPTER 2. STATE OF THE ART condu
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10 CHAPTER 2. STATE OF THE ART soil
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14 CHAPTER 2. STATE OF THE ART Figu
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16 CHAPTER 2. STATE OF THE ART - Su
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18 CHAPTER 2. STATE OF THE ART - Re
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20 CHAPTER 2. STATE OF THE ART Volu
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22 CHAPTER 2. STATE OF THE ART Drai
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24 CHAPTER 2. STATE OF THE ART wher
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26 CHAPTER 2. STATE OF THE ART drai
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28 CHAPTER 2. STATE OF THE ART Tabl
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30 CHAPTER 2. STATE OF THE ART Tabl
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32 CHAPTER 2. STATE OF THE ART by W
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34 CHAPTER 2. STATE OF THE ART proc
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36 CHAPTER 2. STATE OF THE ART - Im
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38 CHAPTER 2. STATE OF THE ART auth
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40 CHAPTER 2. STATE OF THE ART 2.5.
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46 CHAPTER 2. STATE OF THE ART fitt
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48 CHAPTER 2. STATE OF THE ART Satu
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50 CHAPTER 2. STATE OF THE ART when
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52 CHAPTER 2. STATE OF THE ART Degr
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54 CHAPTER 2. STATE OF THE ART 1. T
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56 CHAPTER 2. STATE OF THE ART 0.2
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58 CHAPTER 2. STATE OF THE ART meth
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60 CHAPTER 2. STATE OF THE ART When
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62 CHAPTER 2. STATE OF THE ART Vert
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64 CHAPTER 2. STATE OF THE ART a) S
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66 CHAPTER 2. STATE OF THE ART - Ja
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68 CHAPTER 2. STATE OF THE ART
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70 CHAPTER 3. INTRODUCTION TO PROCE
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76 CHAPTER 4. EXPERIMENTAL SETUPS s
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78 CHAPTER 4. EXPERIMENTAL SETUPS 1
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80 CHAPTER 4. EXPERIMENTAL SETUPS D
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82 CHAPTER 4. EXPERIMENTAL SETUPS d
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84 CHAPTER 4. EXPERIMENTAL SETUPS b
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86 CHAPTER 4. EXPERIMENTAL SETUPS t
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90 CHAPTER 4. EXPERIMENTAL SETUPS D
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94 CHAPTER 4. EXPERIMENTAL SETUPS T
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96 CHAPTER 5. MATERIAL USED AND EXP
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98 CHAPTER 5. MATERIAL USED AND EXP
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100 CHAPTER 5. MATERIAL USED AND EX
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116 CHAPTER 6. EXPERIMENTAL RESULTS
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234 APPENDIX E. NEW SWCC MODEL - DE
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240 40 50 30 APPENDIX E. NEW SWCC M
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242 Observed Values Number of obser
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244 BIBLIOGRAPHY Aubertin, M., Mbon
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246 BIBLIOGRAPHY Campbell, J. D. (1
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248 BIBLIOGRAPHY Davis, J. L. & Ann
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250 BIBLIOGRAPHY Ferré, P. A. & To
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252 BIBLIOGRAPHY Grozic, J. L. H.,
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254 BIBLIOGRAPHY Janbu, N. (1969),
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256 BIBLIOGRAPHY Lawton, E. C., Fra
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258 BIBLIOGRAPHY Mualem, Y. (1977),
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260 BIBLIOGRAPHY Phene, C. J., Hoff
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262 BIBLIOGRAPHY Rojas, J. C., Sali
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264 BIBLIOGRAPHY Stoimenova, E., Da
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266 BIBLIOGRAPHY Vanapalli, S. K. &
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268 BIBLIOGRAPHY Unsaturated Geotec
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Schriftenreihe des Lehrstuhls für
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Herausgeber: Th. Triantafyllidis 32
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Hydro-Mechanical Properties of an Unsaturated Frictional Material

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