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Laboratory Studies Into Undercarriage Systems Depth (mm) 0 100 200 300 400 500 600 700 800 Penetrometer Resistance (MPa) 0 0,5 1 1,5 2 2,5 3 Control 900-500/70 900-700 Track-700 Track-500/70 680-500/85 680 Alternative 900X3 680-680 680-700 23 - 11 LSD Figure 28: Penetrometer resistance for different undercarriage systems Depth (mm) 0 100 200 300 400 500 600 700 800 Penetrometer Resistance (MPa) 0 0,5 1 1,5 2 2,5 3 Control Track-700 Track-500/70 680 Alternative Ph.D. Thesis Dirk Ansorge (2007) 900X3 680-680 680-700 23 - 11 Figure 29: Group of track type penetrometer resistance including 680-680 Depth (mm) 0 100 200 300 400 500 600 700 800 LSD Penetrometer Resistance (MPa) 0 0,5 1 1,5 2 2,5 Control 900-500/70 900-700 680-500/85 680-680 LSD Figure 30: Group of wheel type penetrometer resistance 40
Laboratory Studies Into Undercarriage Systems The 680-680 was in the range of wheeled machines and is included in both diagrams as for the tracked types with the peak at the surface it creates the highest penetrometer resistance below 300 mm and for the wheeled type the least. Statistically these two groups could be partially defined whereby the 680-680 was not sig- nificantly different from either. Full statistical details are given in Table 6 whereby the average penetrometer resistance is given for each treatment. The statistical analysis consid- ered the penetrometer resistance with depth profile, too, such that this average comparison takes account of the individual change in penetrometer resistance with depth. Table 6: Average penetrometer resistance for whole machine treatments 3.2.2 Soil Displacement (similar penetrometer resistance followed by the same letter) Treatment Penetrometer Resistance (MPa) Group Control 0.87 23-11 1.329 A 680-700 1.349 A 900X3 1.352 A Track-700 1.386 AB Track-500/70 1.437 AC 680Alt 1.510 AD 680-680 1.612 DCB 900-500/70 1.631 DC 680-500/85 1.676 D 900-700 1.698 D LSD 0.23 As there was no difference among the penetrometer resistances for the different implement tyres the evaluation of soil displacement after the pass of the rear tyres was particularly interesting. Figure 31 shows the soil displacement depending on inflation pressure and size of the contact area. Larger contact areas and lower inflation pressure, respectively, reduced soil displacement. The 500-70/4.5/2.3 caused most soil displacement due to its high inflation pressure and small contact patch compared to all other rear tyres (p-values ranging from
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Cranfield University School of Appl
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Abstract Ancillary experiments show
Page 5 and 6: Table of Contents TABLE OF CONTENTS
Page 7 and 8: Table of Contents 4.1.3 Analysis of
Page 9 and 10: Table of Contents 11.1.1.1 Comparis
Page 11 and 12: List of Figures and Tables Figure 3
Page 13 and 14: List of Figures and Tables Figure 1
Page 15 and 16: Nomenclature NOMENCLATURE Abbreviat
Page 17 and 18: Introduction 1 INTRODUCTION 1.1 Bac
Page 19 and 20: Introduction � Ansorge, D. and Go
Page 21 and 22: Introduction 1.2 Aim To elucidate t
Page 23 and 24: Introduction a) the soil compaction
Page 25 and 26: Experimental Methods 2.1.1.1 Test F
Page 27 and 28: Experimental Methods had been mount
Page 29 and 30: Experimental Methods track; the loa
Page 31 and 32: Experimental Methods 800/10.5/2.5 t
Page 33 and 34: Experimental Methods term. In the m
Page 35 and 36: Experimental Methods Soil Surface F
Page 37 and 38: Experimental Methods Depth (cm) 0 1
Page 39 and 40: Experimental Methods ence surface c
Page 41 and 42: Experimental Methods chine derives
Page 43 and 44: Experimental Methods depth. The dat
Page 45 and 46: Experimental Methods with water and
Page 47 and 48: Experimental Methods 2.4 Statistica
Page 49 and 50: Laboratory Studies Into Undercarria
Page 55: Laboratory Studies Into Undercarria
Page 77 and 78: Field Study With Full Size Combine
Page 99 and 100: Alleviation of Soil Compaction Howe
Page 101 and 102: Alleviation of Soil Compaction not
Page 103 and 104: Alleviation of Soil Compaction in a
Page 105 and 106: Alleviation of Soil Compaction diff
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Soil Compaction Models sibilities t
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Soil Compaction Models depends on t
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Soil Compaction Models Wroth (1968)
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Soil Compaction Models however, the
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Soil Compaction Models level. Criti
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Soil Compaction Models Utilizing Ke
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Soil Compaction Models average of m
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Soil Compaction Models Depth (mm) -
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Soil Compaction Models ture content
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Soil Compaction Models with four ot
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Soil Compaction Models Predicted In
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Soil Compaction Models Depth (mm) -
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Soil Compaction Models and 13.7 % b
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Soil Compaction Models Rel. Density
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Soil Compaction Models VCL paramete
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Soil Compaction Models The approach
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Soil Compaction Models surface stay
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Soil Compaction Models This result
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Soil Compaction Models 6.6.1.3 Wate
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Soil Compaction Models σσ 1 (kPA)
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Soil Compaction Models pressure to
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Soil Compaction Models The response
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Soil Compaction Models On medium so
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Soil Compaction Models SOILFLEX tak
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Ancillary Experiments 7 ANCILLARY E
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Ancillary Experiments Average conta
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Ancillary Experiments In order to c
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Ancillary Experiments contrary, the
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Ancillary Experiments Figure 102: S
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Ancillary Experiments track and the
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Ancillary Experiments even when hav
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Ancillary Experiments 7.3.2 Influen
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Ancillary Experiments The results f
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Ancillary Experiments Figure 117: S
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Ancillary Experiments Contact Press
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Ancillary Experiments Figure 123: F
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Ancillary Experiments Sinkage (mm)
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Ancillary Experiments model which o
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Ancillary Experiments 7.3.5 The Inf
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Ancillary Experiments 7.3.7 Discuss
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Ancillary Experiments Terzaghi (194
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Ancillary Experiments contact area.
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Ancillary Experiments soil forward
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Conclusions � The longitudinal so
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Bibliography 10 BIBLIOGRAPHY Aboaba
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Bibliography Defossez, P., Richard,
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Bibliography Gregory, A.S.; Whalley
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Bibliography Lamande, M., Schjonnin
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Bibliography Seig, D., 1985. Soil C
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Appendix 11 APPENDIX Ph.D. Thesis D
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Appendix Figure 32: VCL sample at t
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Appendix comparison at the deepest
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Appendix Estimated Pressure (kPa) 2
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Appendix 11.1.1.2.1 SOCOMO One of t
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Appendix by Seig (1985) who showed
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Appendix Soil water content 15 % an
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Appendix Adapting critical state so
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Appendix density is obtained by add
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Appendix Table 5: Values of constan
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Appendix choice of a concentration
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Appendix 11.1.3.1 Dense/Hard and Lo
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Appendix 11.1.3.2 Stratified Soil C
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Appendix To summarize the ability t
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Appendix In the following the predi
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Appendix concentration factor of 4,
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Appendix 11.1.5.1 Confining Pressur
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Appendix Figure 24. The VCL created
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Appendix Rel. Density 2 1,9 1,8 1,7
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Appendix relation of � 1 to � 2
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Appendix Rel. Density 2 1,9 1,8 1,7
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Appendix Rel. Density 1,7 1,68 1,66
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Appendix Depth (mm) 0,0 100,0 200,0
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Appendix Figure 42: Plate in cookin
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Appendix � z � � �� k c p
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Appendix Table 8: n and k depending
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Appendix to the plate sinkage equat
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Appendix with a slight deviation fr
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Appendix Table 12: DBD values for a
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