Cranfield University

List of Figures and Tables
Figure 67: Estimated pressure from Keller (2005) vs. contact pressure for tyre loads 101
Figure 68: Compression behaviour of soil ................................................................... 103
Figure 69: Measured and predicted soil displacement ................................................. 105
Figure 70: Virgin compression line for sandy loam soils. ........................................... 107
Figure 71: Measured and predicted soil displacement for tyres................................... 108
Figure 72: Measured vs. predicted average percentage increase in soil density.......... 108
Figure 73: Measured and predicted soil displacement for tyres................................... 110
Figure 74: Predicted vs. measured increase in soil displacement ................................ 111
Figure 75: Predicted and measured soil displacement on stratified soil conditions..... 112
Figure 76: Predicted and measured soil displacement after 3 passes of 900 mm tyre . 113
Figure 77: Predicted and measured soil displacement on uniform soil conditions ...... 113
Figure 78: Predicted vs. measured increase in soil displacement for multi passes ...... 114
Figure 79: VCL for cay soil gained in field experiment .............................................. 115
Figure 80: Predicted vs. measured soil displacement on clay soil in field................... 116
Figure 81: Virgin compression lines from two concentration factors of field ............. 117
Figure 82: Measured and predicted soil displacement ................................................. 117
Figure 83: Measured and predicted soil displacement ................................................. 118
Figure 84: VCL gained from contact pressure and density increase............................ 121
Figure 85: Predicted vs. measured increase in DBD for the VCL ............................... 122
Figure 86: Predicted sinkage for tracks using individual VCL .................................... 123
Figure 87: Virgin compression line for plate sinkage tests with different plate sizes.. 124
Figure 88: Measured and differently predicted soil displacement for 900/10.5/1.9 .... 124
Figure 89: VCLs from O’Sullivan (1998), Leeson and Campbell (1983) ................... 126
Figure 90: VCL with and without compensation for water compressibility................ 127
Figure 91:
� 1 in relation to
� 2 and
� 3 during the virgin compression test loading..... 129
Figure 92: Virgin compression lines for radial and averaged radial-axial loading ...... 129
Figure 93: Comparison of prediction of 900/10.5/1.9 tyre........................................... 130
Figure 94: Predicted soil displacement using averaged VCLs at 1.4 g/cm 3 ................. 131
Figure 95: Predicted vs. measured depth of the tyres from plate sinkage data ............ 134
Figure 96: Predicted vs. measured depth of the tyres from plate sinkage data ............ 134
Figure 97: Displacement vs. Depth, top 300 mm with regression lines....................... 140
Figure 98: Penetrometer resistances for rear tyres and track at 12 t ............................ 140
Figure 99: A digital image of the longitudinal position of the sand columns .............. 142
Ph.D. Thesis Dirk Ansorge (2007)
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