A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Micro- and macroscopic interaction behaviour of geogrid-reinforced soils
The complex interaction between geogrids and adjacent soils is key to the performance of geosynthetic-reinforced soil (GRS) structures and needs to be understood from the micro- and macroscopic perspective to enable safe and economical designs. For this purpose, the micro- and macroscopic interaction behaviour of geogrid-reinforced soils was investigated in this thesis by combining experimental results with numerical modelling. Interaction experiments with transparent soil were performed to investigate the modes of interaction and the microscopic load transfer. A new experimental setup was presented to provide a more realistic insight into indirectly activated geosynthetics by the movement of the surrounding soil. The transparent soil technique was used to record the processes at the interface unobstructed and continuously by digital image analysis. The microscopic interaction performance was evaluated regarding deflections of geogrid transverse members, locally mobilised tensile strains and loads, and interface shear stresses resulting from the relative displacements between geogrid and adjacent soil. The effects of geogrid aperture size, tensile stiffness, geogrid type and reinforcement configurations, properties of the fill, confining stress, and load plate length and arrangement on the development of interaction zones and interface performance were investigated. Three distinct modes of interaction were identified for indirectly activated geogrids: pushout, pullout and interlocking. In the pushout zone, loads from the soil were transferred to the geogrid. The direction of load transfer was reversed in the pullout zone, where the geosynthetic tensile force was anchored to the fill. In the interlocking zone, equilibrium was established, where neither relative movement nor load transfer occurred between geogrid and adjacent soil. Additionally, small-scale and large-scale 1g experiments were conducted under plane strain conditions to analyse the macroscopic structural behaviour of GRS walls regarding bearing ...
Micro- and macroscopic interaction behaviour of geogrid-reinforced soils
The complex interaction between geogrids and adjacent soils is key to the performance of geosynthetic-reinforced soil (GRS) structures and needs to be understood from the micro- and macroscopic perspective to enable safe and economical designs. For this purpose, the micro- and macroscopic interaction behaviour of geogrid-reinforced soils was investigated in this thesis by combining experimental results with numerical modelling. Interaction experiments with transparent soil were performed to investigate the modes of interaction and the microscopic load transfer. A new experimental setup was presented to provide a more realistic insight into indirectly activated geosynthetics by the movement of the surrounding soil. The transparent soil technique was used to record the processes at the interface unobstructed and continuously by digital image analysis. The microscopic interaction performance was evaluated regarding deflections of geogrid transverse members, locally mobilised tensile strains and loads, and interface shear stresses resulting from the relative displacements between geogrid and adjacent soil. The effects of geogrid aperture size, tensile stiffness, geogrid type and reinforcement configurations, properties of the fill, confining stress, and load plate length and arrangement on the development of interaction zones and interface performance were investigated. Three distinct modes of interaction were identified for indirectly activated geogrids: pushout, pullout and interlocking. In the pushout zone, loads from the soil were transferred to the geogrid. The direction of load transfer was reversed in the pullout zone, where the geosynthetic tensile force was anchored to the fill. In the interlocking zone, equilibrium was established, where neither relative movement nor load transfer occurred between geogrid and adjacent soil. Additionally, small-scale and large-scale 1g experiments were conducted under plane strain conditions to analyse the macroscopic structural behaviour of GRS walls regarding bearing ...
Micro- and macroscopic interaction behaviour of geogrid-reinforced soils
Derksen, Jan (author) / Ziegler, Martin / Fuentes Gutierrez, Raul / Grabe, Jürgen
2023-01-01
Aachen : RWTH Aachen University 1 Online-Ressource : Illustrationen, Diagramme (2023). doi:10.18154/RWTH-2023-09833 = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2023
Theses
Electronic Resource
English
Micro- and macroscopic interaction behaviour of geogrid-reinforced soils
| TIBKAT | 2023
Behaviour of Geogrid Reinforced Foundation
| British Library Conference Proceedings | 1997
Geogrid Reinforced Lime Cement Treated Granular Soils
| Tema Archive | 2013
Geogrid Reinforced Lime Cement Treated Granular Soils
| Trans Tech Publications | 2013
Behaviour of geogrid reinforced earth retaining walls
| British Library Conference Proceedings | 1996