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The Impact of Different Strain Rates of Polypropylene Geotextiles on Slope Factor of Safety

Wiktor Sitek

Wiktor Sitek

Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environmental EngineeringWarszawa, Poland
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Sitek, Wiktor
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Agnieszka Kiersnowska

Agnieszka Kiersnowska

Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environmental EngineeringWarszawa, Poland
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Kiersnowska, Agnieszka
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Vazgen Bagdasaryan

Vazgen Bagdasaryan

Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environmental EngineeringWarszawa, Poland
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Bagdasaryan, Vazgen
 und 
Eugeniusz Koda

Eugeniusz Koda

Warsaw University of Life Sciences – SGGW, Faculty of Civil and Environmental EngineeringWarszawa, Poland
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Koda, Eugeniusz
  
17. Apr. 2025
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Artikel-Kategorie: Original Study
Online veröffentlicht: 17. Apr. 2025
Seitenbereich: 134 - 144
Eingereicht: 07. Juni 2024
Akzeptiert: 20. Dez. 2024
DOI: https://doi.org/10.2478/sgem-2025-0009
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© 2025 Wiktor Sitek et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1:

Plain weave geotextile (Shukla, 2017).
Plain weave geotextile (Shukla, 2017).

Figure 2:

Geotextile subjected to testing (own photography).
Geotextile subjected to testing (own photography).

Figure 3:

Flowchart of the research process.
Flowchart of the research process.

Figure 4:

a) INSTRON tensile strength machine, b) extensometer (own photography).
a) INSTRON tensile strength machine, b) extensometer (own photography).

Figure 5:

Comparison of typical results for different stretching speeds (own work).
Comparison of typical results for different stretching speeds (own work).

Figure 6:

Slip curves along with the obtained factor of safety (own work).
Slip curves along with the obtained factor of safety (own work).

Figure 7:

Slip curves along with the obtained factor of safety (own work).
Slip curves along with the obtained factor of safety (own work).

Figure 8:

Slip curves along with the obtained factor of safety (own work).
Slip curves along with the obtained factor of safety (own work).

Figure 9:

Increase in strength for woven geotextile with the strain rate (own work).
Increase in strength for woven geotextile with the strain rate (own work).

Compilation of tensile test results for the tested samples_

20 mm/min 2 mm/min 0.2 mm/min
Tensile strength (kN/m) Strain at maximum tensile strength (%) Tensile strength (kN/m) Strain at maximum tensile strength (%) Tensile strength (kN/m) Strain at maximum tensile strength (%)
1 30.00 5.70 29.35 6.60 28.70 10.30
2 31.20 5.70 30.35 7.00 27.45 9.00
3 31.05 5.20 28.20 6.60 27.15 9.10
4 33.44 5.60 29.20 7.30 27.15 9.30
5 32.25 5.60 29.90 6.70 26.70 9.30
Max value 33.44 5.70 30.35 7.30 28.70 10.30
Min value 30.00 5.20 28.20 6.60 26.70 9.00
Average value 31.55 5.60 29.40 6.80 27.45 9.40
Standard deviation 0.260 0.20 0.161 0.30 0.152 0.50

Reduction factors_

A1 A2 A3 A4
1.53 1.10 1.00 1.00

Parameters of the geotextile subjected to testing_

Tensile strength Maximum elongation at load Static puncture resistance Dynamic puncture resistance Thickness Unit mass Pore size characteristics
Length-wise Width-wise Length-wise Width-wise 4.3 kN 8.3 mm 0.37 mm 200 g/m2 190 μm
32 kN/m 32 kN/m 18% 14%

Functions of geosynthetics_

Type of geosynthetic Filtration Separation Reinforcement Sealing Protection Drainage Barrier
Woven X X X X
Nonwoven X X X X X
Geogrids X
Geonets X X
Geocomposites X X X X
Geomembrane X X X

Geotechnical parameters of soils_

Type of soil Thickness t (m) Specific gravity ɣ (kN/m3) Dry density ρd (g/cm3) Angle of internal friction φ′ (°) Cohesion c’ (kPa)
1. MSa 5 19 1.33 32 0
2. siCl 5 20 1.74 15 20
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