an engineering geological characterisation of tropical clays - GBV

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Table 8.1. Values of index properties of soils along field profiles in this study.
Profile
Depth
(m)
Sample No.
Sta.
position (m)
Wn
(%) LL (%) PI (%)
LS
(%)
FS
(%)
Depth
(m)
Sample No.
Wn
(%) LL (%) PI (%)
SA1-30cm 0 32 78 41 25 135 SA1-50cm 30 75 39 23 100
SA2-
A < 0,50 SA2-30cm 250 34 93 54 27 135 ≥ 0,50 70/105cm 32 89 55 26 145
SA28-30cm 6750 26 85 45 25 125 SA28-50cm 27 89 47 25 135
SA37-
SA37-30cm 9000 19 81 43 24 115
50/80cm 23 84 39 26 115
SA41-30cm 10000 23 89 47 26 135 SA41-50cm 25 90 49 24 120
SB1-30cm 0 23 82 47 23 125 SB1-50/70cm 29 87 50 25 140
B < 0,50 SB5-30cm 1000 24 81 47 23 120 ≥ 0,50 SB5-50/70cm 29 88 50 25 140
SB7-30cm 1500 23 83 48 24 130 SB7-50/70cm 28 87 49 25 138
SB18-30cm 4250 20 82 43 23 120 SB18-50cm 20 72 39 21 120
SB27-30cm 6500 22 85 47 24 130 SB27-50cm 22 88 49 25 130
SB31-30cm 7500 23 87 49 24 130 SB31-50cm 23 86 48 25 130
SB41-30cm 10000 23 89 44 26 145 SB41-50cm 24 91 47 25 145
SB42-30cm 10250 22 88 44 25 145 SB42-50cm 21 91 47 26 145
SC1-30cm 0 24 82 48 23 125 SC1-50cm 26 85 48 24 135
C < 0,50 SC5-30cm 1000 23 83 48 23 125 ≥ 0,50 SC5-50cm 25 84 47 24 135
SC9-30cm 2000 25 84 48 24 130 SC9-50cm 26 85 48 24 135
SC17-30cm 4000 21 76 41 25 105 SC17-50cm 22 81 48 24 110
SC25-30cm 6000 26 88 49 25 125 SC25-50cm 26 89 48 25 145
SC29-30cm 7000 21 82 49 25 110 SC29-50cm 20 80 43 26 110
SC33-30cm 8000 20 82 49 25 120 SC33-50cm 21 83 50 26 120
SC41-30cm 10000 18 85 47 29 125 SC41-50cm 17 84 47 29 125
SD1-30cm 0 27 82 46 26 125 SD1-50/80cm 29 87 48 27 135
D < 0,50 SD5-30cm 1000 26 84 47 26 125 ≥ 0,50 SD5-50/70cm 29 88 49 27 135
SD7-30cm 1500 27 84 48 27 110 SD7-50/70cm 29 89 51 26 138
SD17-30cm 4000 20 84 44 24 120 SD17-50cm 22 84 49 25 130
SD25-30cm 6000 22 80 39 25 125 SD25-50cm 21 86 45 25 135
SD29-30cm 7000 18 85 47 27 125 SD29-50cm 22 86 51 26 145
SD33-30cm 8000 20 85 47 27 125 SD33-50cm 21 86 50 25 145
SD41-30cm 10000 23 85 46 26 130 SD41-50cm 25 90 49 26 135
SE1-30cm 0 24 82 48 23 125 SE1-50/70cm 29 88 50 25 140
E < 0,50 SE5-30cm 1000 25 85 48 24 125 ≥ 0,50 SE5-50/70cm 28 89 49 26 138
SE13-30cm 3000 21 86 47 24 125 SE13-50cm 24 89 49 25 130
SE21-30cm 5000 25 88 49 25 125 SE21-50cm 26 90 49 26 145
SE29-30cm 7000 22 81 46 25 120 SE29-50cm 23 83 47 26 120
SE37-30cm 9000 21 85 48 24 125 SE37-50cm 22 85 48 25 130
SE41-30cm 10000 22 87 47 25 135 SE41-50cm 21 88 48 26 135
max 34 93 54 29 145 max 32 91 55 29 145
Statistical < 0,50 min 18 76 39 23 105 ≥ 0,50 min 17 72 39 21 100
analysis range 16 17 15 6 40 range 15 19 16 8 45
median 23 84 47 25 125 median 25 87 48 25 135
mode 23 85 47 25 125 mode 29 89 49 25 135
mean 23 84 47 25 126 mean 25 86 48 25 132
std 3,37 3,30 2,78 1,38 8,26 std 3,56 4,11 3,28 1,29 11,33
128,2
var 11,36 10,90 7,74 1,89 68,25 var 12,69 16,86 10,76 1,67 8
cov 9,71 8,28 5,60 1,05 35,52 cov 9,71 8,28 5,60 1,05 35,52
correlation 0,83 0,63 0,63 0,61 0,39 correlation 0,83 0,63 0,63 0,61 0,39
There is a general decrease of moisture content of soils west-eastwards across the study area
at depths of less than 0,50m, as well as those at 0,50m and more. This could be attributed to a
similar variation in the total thickness of soils which also decreases west-eastwards across the
study area, from depths of 1,50-2,0m in the western parts to 0,50-0,70m in the eastern parts of
LS
(%)
FS
(%)