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The Role of Spatial Distribution of Geotechnical Soil Parameters in Site Investigation

Tatiana Olinic

Tatiana Olinic

Department of Environmental Engineering and Land Reclamation, University of Agronomic Sciences and Veterinary MedicineBucharest, Romania
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Olinic, Tatiana
, 
Ernest-Daniel Olinic

Ernest-Daniel Olinic

Department of Geotechnical and Foundation Engineering, Technical University of Civil EngineeringBucharest,
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Olinic, Ernest-Daniel
, 
Ioan Boți

Ioan Boți

Department of Geotechnical and Foundation Engineering, Technical University of Civil EngineeringBucharest,
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Boți, Ioan
 und 
Ionuț-Alexandru Ciocaniu

Ionuț-Alexandru Ciocaniu

Department of Geotechnical and Foundation Engineering, Technical University of Civil EngineeringBucharest,
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Ciocaniu, Ionuț-Alexandru
  
18. Juli 2024
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Artikel-Kategorie: Original Study
Online veröffentlicht: 18. Juli 2024
Seitenbereich: 230 - 243
Eingereicht: 10. Apr. 2024
Akzeptiert: 10. Juni 2024
DOI: https://doi.org/10.2478/sgem-2024-0016
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© 2024 Tatiana Olinic et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

The studied site and the positions of the geotechnical investigations (source: Google Earth).
The studied site and the positions of the geotechnical investigations (source: Google Earth).

Figure 2:

Variation of physical parameters with depth.
Variation of physical parameters with depth.

Figure 3:

Variation of physical geotechnical parameters with depth.
Variation of physical geotechnical parameters with depth.

Figure 4:

Variation of physical geotechnical parameters with depth.
Variation of physical geotechnical parameters with depth.

Figure 5:

Variation of oedometric modulus, Eoed200–300 (kPa), with depth.
Variation of oedometric modulus, Eoed200–300 (kPa), with depth.

Figure 6:

Variation of shear strength parameters with depth.
Variation of shear strength parameters with depth.

Figure 7:

Spatial (2D) variation of physical geotechnical parameters with depth.
Spatial (2D) variation of physical geotechnical parameters with depth.

Figure 8:

Spatial (2D) variation of consistency index (IC, -) with depth.
Spatial (2D) variation of consistency index (IC, -) with depth.

Figure 9:

Spatial (2D) variation of percentage of clay (top), silt (middle), and sand (bottom) with depth.
Spatial (2D) variation of percentage of clay (top), silt (middle), and sand (bottom) with depth.

Figure 10:

Spatial (2D) variation of mechanical parameters with depth.
Spatial (2D) variation of mechanical parameters with depth.

Figure 11:

Geotechnical cross section.
Geotechnical cross section.

Recommended maximum values of the coefficient of variation (Vxmax) for the division into geological layers [8]_

Geotechnical parameter Vx max
Unit weight, γ (kN/m3) 0.05

Moisture content, w (%)

Consistency index, IC

Porosity index, e

Degree of compaction, ID (%)

 0.15
Plasticity index, IP (%) 0.30

Example of uniform distribution of measured values confirmed as being part of the same geotechnical layer_

Measured values of consistency index, Ic (-) 0.484
0.488 0.512
0.495 0.522 0.540
0.507 0.538 0.557 0.568
0.531 0.566 0.582 0.591 0.597
0.625 0.625 0.625 0.625 0.625
0.719 0.684 0.668 0.659 0.653
0.743 0.712 0.693 0.682
0.755 0.728 0.710
0.762 0.738
0.766
Minimum values, Xmin 0.531 0.507 0.495 0.488 0.484
Maximum values, Xmax 0.719 0.743 0.755 0.762 0.766
Average values, Xm 0.625 0.625 0.625 0.625 0.625
Number of selected values, n 3 5 7 9 11
Standard deviation, sx 0.094 0.094 0.094 0.094 0.094
Coefficient of variation, Vx 0.15 0.15 0.15 0.15 0.15
kn for Vx unknown 1.69 0.96 0.73 0.61 0.54
Xk sup = Xm(1 + kn Vx unknown) 0.78 0.71 0.69 0.68 0.68
Xk inf = Xm(1 - kn Vx unknown) 0.47 0.54 0.56 0.57 0.57
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