| Autor: |
Cheriet, Fayssal, Hani, Mostefa, Ladjal, Houssem Anis Edine, Ben aziz, Brahim |
| Zdroj: |
Modeling Earth Systems and Environment; August 2024, Vol. 10 Issue: 4 p5399-5407, 9p |
| Abstrakt: |
The nailing system is a commonly utilized method for stabilizing the diaphragm walls created by excavations and natural or artificial slopes. This study presents the stability of the slope in a cut zone with a significant height of 35 m. The slope is a natural ground with instable soil and fractured rock characteristics. In this way, a parametric study that concerns the ground water levels and nail length on the actual railway line between Boughezoul and Djelfa cities in Algeria (kilometer points Pk 222 + 000 to Pk 244 + 500) is investigated. The mechanical characteristics of the steel nails with a diameter of 25 mm and angled 15° to the horizontal (actual measured yield strength of Fe E50A and minimum specified yield strength of fy = 500 MPa) were applied. Concrete was sprayed in two layers of 5 cm with a 350 kg/m3cement weight dosage via the shotcreting technique. The project is simulated via PLAXIS 2D software to locate the critical sliding surfaces and define the safety factors. As a result of the simulations, the overall safety factors were higher than the established minimums of the reference case of 1.38, thus guaranteeing the safety of the slopes with a safety factor equal to 1.63. Consequentially, the effect of the difference in ground water levels offers novel potential for railway line projects in geotechnical engineering. |
| Databáze: |
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