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Studia Geotechnica et Mechanica
Volume 45 (2023): Issue s1 (December 2023)
Open Access
Correlation between Cone Penetration Test parameters, soil type, and soil liquidity index using long short-term memory neural network
Mateusz Jocz
Mateusz Jocz
and
Marek Lefik
Marek Lefik
| Nov 13, 2023
Studia Geotechnica et Mechanica
Volume 45 (2023): Issue s1 (December 2023)
Special Issue 19th KKMGiIG
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Article Category:
Special Issue 19th KKMGiIG
Published Online:
Nov 13, 2023
Page range:
405 - 415
Received:
Mar 03, 2023
Accepted:
Oct 04, 2023
DOI:
https://doi.org/10.2478/sgem-2023-0023
Keywords
geotechnical parameters
,
Cone Penetration Test (CPTU)
,
liquidity index
,
Long Short-Term Memory (LSTM) neural network
© 2023 Mateusz Jocz et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Figure 1:
CPTU probe test scheme.
Figure 2:
An example of a research point consisting of: a) a cross section of the borehole, where Sa – sand, Si – silt, Cl – clay, Mg – made ground, Gr – gravel; b–d) graphs of the basic parameters of CPTU probing, such as qc, fs, and u2; e) a graph of the calculated laboratory values of the liquidity index IL for the selected layers.
Figure 3:
Liquidity index IL before (green line) and after (orange line) transformation for the example research point.
Figure 4:
Results of identification of liquidity index with the developed LSTM network in comparison with known values of the liquidity index. Explanation in the text.
Figure 5:
Comparison of the obtained results with the correlation proposed by PN-B-04452:2002 and with laboratory results transformed by Equation 3 for profile number 7.
Figure 5:
Borehole profiles.
Figure 6:
Results of identification of soil type with the developed LSTM network (predicted data) in comparison with known borehole profiles (actual data). The profile includes the following data numbers: profile 1 (0–540), profile 2 (540–2115), profile 3 (2115–2837), profile 4 (2837–3547), profile 5 (3547–4600), profile 6 (4600–5318), profile 7 (5318–6304), profile 8 (6304–8060).
Division of soil types into categories.
Soil types
Symbol
Category
Made ground
Mg
1
Fine sand
FSa
2
Medium sand
MSa
3
Glacial till
siSa, clSa, sasiCl
4
Settled deposits
clSi, saSi, Si,
5
Settled deposits with gravel
grsaSi, grclSi
6
Gravel
Gr
7