Improvement of existing railway subgrade by deep mixing
| Autor: | Jean-Francois Mosser, Philippe Reiffsteck, Anne Pantet, Alain Le Kouby, Nicolas Calon, Antoine Guimond-Barrett |
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| Přispěvatelé: | Sols, Roches et Ouvrages Géotechniques (IFSTTAR/GERS/SRO), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Communauté Université Paris-Est, SNCF Direction de l'Ingénierie - Traction Electrique, SNCF, Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU), SNCF Réseau [La Plaine st Denis], 13N10491, Projet RUFEX - FUI, Communauté Université Paris-Est-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
PIEU 0211 other engineering and technologies PLATE FORME 02 engineering and technology Field tests FONDATION PROFONDE AMELIORATION DES SOLS 021105 building & construction 11. Sustainability Geotechnical engineering CIMENT Mixing (physics) 021101 geological & geomatics engineering Civil and Structural Engineering COLONNE BALLASTEE Subgrade SOUS COUCHE FERROVIAIRE RAILWAY SUBGRADE [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering DEEP SOIL MIXING SOIL-CEMENT COLUMN Environmental science CHEMIN DE FER (VOIE) GROUND IMPROVEMENT TRAITEMENT DES SOLS |
| Zdroj: | European Journal of Environmental and Civil Engineering European Journal of Environmental and Civil Engineering, Taylor & Francis, 2018, 29 p. ⟨10.1080/19648189.2018.1456977⟩ |
| ISSN: | 1964-8189 2116-7214 |
| Popis: | Many old railway lines in Europe need to be reinforced as they no longer meet the requirements of modern traffic. This paper presents the results of field tests carried out, as part of the French RUFEX research project (Reinforcement of railway tracks), to study the feasibility of the installation of 600 mm diameter vertical soil-cement columns under existing railway lines without removing the tracks or cementing the ballast. These columns were installed under an existing track using a spreadable mixing tool. The execution procedure is described and the quality / homogeneity of the mixed material is studied with excavated columns after curing periods of 28 and 180 days and several samples were taken for laboratory testing. The tests included unconfined compressive strength tests, splitting tensile strength tests, porosity and ultrasonic wave velocity measurements. The results show an increase in strength of 30% between 28 and 180 days. A linear correlation between compressive and tensile strengths is proposed. Besides, data obtained from ultrasonic wave velocity measurements suggests that this test can be used for the estimation of index parameters such as density and porosity but also for preliminary assessments of static stiffness and strength by correlation with the dynamic elastic modulus. |
| Databáze: | OpenAIRE |
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