scholarly journals Deformation of Geosynthetic Reinforced Soil Structures by Design, in the Lab and in the Field

2011 ◽  
Vol 57 (2) ◽  
pp. 153-171
Author(s):  
G. Heerten
Keyword(s):  
Field Tests ◽  
Seismic Loading ◽  
Reinforced Soil ◽  
Soil Reinforcement ◽  
Design Code ◽  
Geosynthetic Reinforced Soil ◽  
Soil Structures ◽  
The Usa ◽  
New Research ◽  
Reinforcement Interaction

Abstract Green-geo-engineering with geosynthetic reinforced soil structures is of increasing practice around the world. Poland is among the leading countries with the third biggest geogrid market in Europe. The German EBGEO 2010 Guideline for Soil Reinforcement with Geosynthetics as first European Guideline for Geosynthetics linked to the Eurocode 7, and the new design code for Japanese railway structures under seismic loading are introduced. New research results from the Geotechnical Institute of the RWTH Aachen, Germany, dealing with the soil/reinforcement interaction and new approaches for design codes for the reinforcement of base courses in traffic areas based on lab and field tests in the USA are presented.

Development and verification of a numerical model for the analysis of geosynthetic-reinforced soil segmental walls under working stress conditions

2005 ◽  
Vol 42 (4) ◽  
pp. 1066-1085 ◽  
Author(s):  
Kianoosh Hatami ◽  
Richard J Bathurst
Keyword(s):  
Numerical Model ◽  
Constitutive Models ◽  
Reinforced Soil ◽  
Stress Conditions ◽  
Soil Reinforcement ◽  
Lagrangian Analysis ◽  
Elastic Plastic ◽  
Geosynthetic Reinforced Soil ◽  
Working Stress ◽  
Good Agreement

The paper describes a numerical model that was developed to simulate the response of three instrumented, full-scale, geosynthetic-reinforced soil walls under working stress conditions. The walls were constructed with a fascia column of solid modular concrete units and clean, uniform sand backfill on a rigid foundation. The soil reinforcement comprised different arrangements of a weak biaxial polypropylene geogrid reinforcement material. The properties of backfill material, the method of construction, the wall geometry, and the boundary conditions were otherwise nominally the same for each structure. The performance of the test walls up to the end of construction was simulated with the finite-difference-based Fast Lagrangian Analysis of Continua (FLAC) program. The paper describes FLAC program implementation, material properties, constitutive models for component materials, and predicted results for the model walls. The results predicted with the use of nonlinear elastic-plastic models for the backfill soil and reinforcement layers are shown to be in good agreement with measured toe boundary forces, vertical foundation pressures, facing displacements, connection loads, and reinforcement strains. Numerical results using a linear elastic-plastic model for the soil also gave good agreement with measured wall displacements and boundary toe forces but gave a poorer prediction of the distribution of strain in the reinforcement layers.Key words: numerical modelling, retaining walls, reinforced soil, geosynthetics, FLAC.

3D effects of turning corner on stability of geosynthetic-reinforced soil structures

2018 ◽  
Vol 46 (4) ◽  
pp. 367-376 ◽  
Author(s):  
Fei Zhang ◽  
Yufeng Gao ◽  
Dov Leshchinsky ◽  
Shangchuan Yang ◽  
Guangyu Dai
Keyword(s):  
Reinforced Soil ◽  
Geosynthetic Reinforced Soil ◽  
Soil Structures ◽  
3D Effects

scholarly journals Geosynthetic reinforced soil bridge abutments under base motion dynamic loading

2021 ◽  
Author(s):  
Mehdi Askari ◽  
Jaber Mamaghanian ◽  
Hamid Reza Razeghi ◽  
S. Mustapha Rahmaninezhad
Keyword(s):  
Seismic Performance ◽  
Bridge Deck ◽  
Dynamic Performance ◽  
Complex Structure ◽  
Seismic Loading ◽  
Reinforced Soil ◽  
Bridge Abutments ◽  
Highway Projects ◽  
Static State ◽  
Geosynthetic Reinforced Soil

Geosynthetic reinforced soil (GRS) bridge abutments are of great interest in different highway projects due to their ease of construction, flexibility, cost-saving, aesthetic aspects and good performance comparing to traditional ones. However, their seismic performance is of question due to their complex structure and lack of proper investigations. Therefore, this paper investigates GRS abutment performance under earthquake loading through numerical modelling using FLAC software. The effect of lateral restraint due to the bridge deck existence was analyzed in this study. Comparing the models with and without the bridge deck indicated that the bridge deck simulation affected static and seismic performance of GRS abutment considerably. Accordingly, restriction of the upper part of GRS abutment with bridge deck modelling decreased facing displacement and reinforcement loads considerably under static loading. Furthermore, simulation of bridge deck caused a noticeable reduction in facing displacement after seismic loading, while it had no considerable effects in reinforcement loads. Additionally, it was found that seismic loading imposed a great increase in facing displacement and reinforcement loads compared to static state. Therefore, it is crucial to investigate the dynamic performance of GRS abutments constructed in seismic prone areas.

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