Modular precast concrete facing for soil nailed retaining walls: Laboratory study and in situ validation
| Autor: | Philippe Robit, T.T. Bui, Jean-Pierre Rajot, Ali Limam, Marion Bost |
|---|---|
| Přispěvatelé: | Géomécanique, Matériaux et Structures (GEOMAS), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon, Risques Rocheux et Ouvrages géotechniques (IFSTTAR/GERS/RRO), Université de Lyon-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), NGE Fondations, parent |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
MUR DE SOUTENEMENT ESSAI 0211 other engineering and technologies Soil nailing 020101 civil engineering 02 engineering and technology MECANIQUE DES SOLS engineering.material SOIL NAILING Retaining wall 0201 civil engineering BETON PREFABRIQUE Precast concrete Crushed stone NUMERICAL SIMULATION EXPERIMENTATION Engineering (miscellaneous) 021101 geological & geomatics engineering Civil and Structural Engineering Computer simulation business.industry Building and Construction Structural engineering Geotechnical Engineering and Engineering Geology Overburden pressure Shotcrete CLOUAGE DES SOLS Weep [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering RETAINING WALL SIMULATION engineering ETUDE EXPERIMENTALE business PRECAST CONCRETE PILE Geology |
| Zdroj: | Innovative Infrastructure Solutions Innovative Infrastructure Solutions, 2019, 24 p. ⟨10.1007/s41062-019-0250-z⟩ |
| DOI: | 10.1007/s41062-019-0250-z⟩ |
| Popis: | A new concept for constructing the facing of soil nailed walls is proposed and validated through experimental and numerical approaches. This new process uses precast concrete panels. For each excavation step, the soil reinforcements are first connected to the panels. A slightly cemented 4-6 mm crushed stone is then injected, through the weep holes, between the panels and the excavation vertical cut, applying a confining pressure to the ground and providing continuous high capacity drainage behind the facing. The structural design of the precast reinforced concrete panel, based on full scale loading tests in the laboratory and non-linear numerical simulations, are presented in detail. Crack initiation and failure modes are properly predicted by the model. A full-scale experimental soil nailed wall 7.5 m high was also built to evaluate the environmental, economic and mechanical performances of the new construction technique compared to the conventional shotcrete technique. The new construction technique greatly improves worker's safety, significantly reduces construction duration and cost and improves the mechanical behavior of the soil nailing technique and drainage of the facing. Compared to the conventional shotcrete technique, the new technique reduces concrete consumption by 64% and greenhouse gases emission by 56%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|