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Analysis of underground stratification based on CPTu profiles using high-pass spatial filter Cover

Analysis of underground stratification based on CPTu profiles using high-pass spatial filter

Studia Geotechnica et Mechanica
Volume 42 (2020): Issue 4 (December 2020)
By: Jakub Rainer and  Hubert Szabowicz  
Open Access
|Sep 2020

Figures & Tables

Figure 1

Roberson soil behaviour type classification chart[7]
Roberson soil behaviour type classification chart[7]

Figure 2

Roberson's soil behaviour type classification chart[11]
Roberson's soil behaviour type classification chart[11]

Figure 3

The Ic thresholds showed on Roberson's soil behaviour type classification chart[8]
The Ic thresholds showed on Roberson's soil behaviour type classification chart[8]

Figure 4

Illustration of failure mechanism and impact zone for pile[13]
Illustration of failure mechanism and impact zone for pile[13]

Figure 5

The schema of the effect of thin layer and transition zone[2]
The schema of the effect of thin layer and transition zone[2]

Figure 6

Illustration of the edge a) perfect edge, b) blurred edge.
Illustration of the edge a) perfect edge, b) blurred edge.

Figure 7

Results obtained with algorithm on training dataset.
Results obtained with algorithm on training dataset.

Figure 8

Results obtained with algorithm on testing dataset 1.
Results obtained with algorithm on testing dataset 1.

Figure 9

Results obtained with algorithm on testing dataset 2.
Results obtained with algorithm on testing dataset 2.

Figure 10

Results obtained with algorithm on testing dataset 3.
Results obtained with algorithm on testing dataset 3.

Figure 11

Comparison of stratification according to Organizers and authors.
Comparison of stratification according to Organizers and authors.

Numbers of subdivisions and corresponding Soil Behaviour Types[11]

SBTSoil behaviour type
1Sensitive, fine grained
2Organic soils: peats
3Clays: silty clay to clay
4Silt mixtures: clayey silt to silty clay
5Sand mixtures: silty sand to sandy silt
6Sand: clean sand to silty sand
7Gravelly sand to dense sand
8Very stiff sand to clayey sand
9Very stiff, fine grained

SBT index classification proposed by Robertson and Wride[8]

ClassificationSoil behaviour typeSoil behaviour type index Ic
SBT2Organic soils: peatsIc > 3.60
SBT3Clays: silty clay to clay2.95 ≤ Ic < 3.60
SBT4Silt mixtures: clayey silt to silty clay2.60 ≤ Ic < 2.95
SBT5Sand mixtures: silty sand to sandy silt2.05 ≤ Ic < =2.60
SBT6Sand: clean sand to silty sand1.31 ≤ Ic < =2.05
SBT7Gravelly sand to dense sandIc < 1.31

Numbers of subdivisions and corresponding Soil Behaviour Types[7]

SBTSoil Behaviour Type
1Sensitive fine grained
2Organic material
3Clay
4Silty clay to clay
5Clayey silt to silty clay
6Sandy silt to clayey silt
7Silty sand to sandy silt
8Sand to silty sand
9Sand
10Gravelly sand to sand
11Very stiff fine grained
12Sand to clayey sand
DOI: https://doi.org/10.2478/sgem-2020-0002 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
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Language: English
Page range: 355 - 365
Submitted on: Feb 28, 2020
Accepted on: Aug 3, 2020
Published on: Sep 22, 2020
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Cone Penetration Test (CPTu),
soil stratification,
convolutional filter,
high-pass spatial filter
Related subjects:
Geosciences,
Geosciences, other,
Materials sciences,
Composites,
Porous materials,
Physics,
Mechanics and fluid dynamics

© 2020 Jakub Rainer, Hubert Szabowicz, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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