Mitigating the bridge end bump problem: A case study of a new approach slab system with geosynthetic reinforced soil foundation

2016 ◽  
Vol 05 (01) ◽  
Author(s):  
Murad Abu-Farsakh
Keyword(s):  
Reinforced Soil ◽  
New Approach ◽  
Geosynthetic Reinforced Soil ◽  
Approach Slab ◽  
Soil Foundation

scholarly journals Evaluating the Performance of Geosynthetic Reinforced Soil-Integrated Bridge System (GRS-IBS) under Working Stress Condition

2019 ◽  
Vol 271 ◽  
pp. 02001
Author(s):  
Murad Abu-Farsakh ◽  
Allam Ardah ◽  
George Voyiadjis
Keyword(s):  
Strain Distribution ◽  
Reinforced Soil ◽  
Span Length ◽  
Linear Elastic ◽  
Geosynthetic Reinforced Soil ◽  
Working Stress ◽  
Spacing Ratio ◽  
Coulomb Model ◽  
Bridge System

This paper evaluates the performance of geosynthetic reinforced soil-Integrated Bridge System (GRS-IBS) in terms of lateral facing deformation and strain distribution along geosynthetics. Simulations were conducted using 2D PLAXIS program. The hardening model proposed by Schanz et al. [1] was used to simulate the behavior of backfill material; the backfill-reinforcement interface was simulated using Mohr-Coulomb model, and the reinforcement and facing block were simulated using linear elastic models. The numerical model was verified using the results of a case study conducted at Maree Michel GRS-IBS, Louisiana. Parametric study was carried out to investigate the effects of span length, reinforcement spacing, and reinforcement stiffness on the performance of GRS-IBS. The results indicate that span length have significant impact on strain distribution along geosynthetics and lateral facing deformation. The reinforcement stiffness has significant impact on the GRS-IBS behavior up to a certain point, beyond which the effect tends to decrease contradictory to reinforcement spacing that has a consistent relationship between the GRS-IBS behavior and reinforcement spacing. The results also indicate that reinforcement spacing has higher influence on the lateral facing deformation than the reinforcement stiffness for the same reinforcement strength/spacing ratio (Tf/Sv) due to the composite behavior of closely reinforcement spacing.

The Bearing Characteristics and its Influencing Factors of Reinforced Soil Foundation

2014 ◽  
Vol 580-583 ◽  
pp. 746-749
Author(s):  
Yang Jiang ◽  
Xiao Mou Wang ◽  
Wen Bin Sun ◽  
Yun Dong
Keyword(s):  
Tensile Modulus ◽  
Reinforced Soil ◽  
Factors Affecting ◽  
Approach Slab ◽  
Subgrade Soil ◽  
Bridge Abutment ◽  
Bridge Approach ◽  
Soil Foundation ◽  
Effective Reinforcement ◽  
Reinforced Clay

The reinforced soil foundations have been widely used in various geotechnical engineering applications, such as bridge approach slab, bridge abutment and so on. However, many problems of reinforced foundation still need to be solved and the behavior of the reinforced foundation requires further study. Therefore, finite element analyses were conducted on unreinforced and reinforced clay subgrade soil to evaluate the influence of various factors affecting the performance of strip footing on studied soils. Conclusions are drawn: the effective reinforcement depth is about 1.5B for the reinforced soil and it is independent of the geogrid type; At a given settlement, the bearing capacity of the footing decreases with the increase in reinforcement spacing, with larger decrease rates at small spacings; A geogrid with a tensile modulus ranging from 5MPa to 25MPa will maximize the benefits of the reinforced soil footing, etc.

Behavior of Geosynthetic Reinforced Soil Foundation Systems Supported on Stiff Clay Subgrade

2016 ◽  
Vol 16 (5) ◽  
pp. 04016007 ◽  
Author(s):  
Arghadeep Biswas ◽  
A. Murali Krishna ◽  
Sujit Kumar Dash
Keyword(s):  
Reinforced Soil ◽  
Geosynthetic Reinforced Soil ◽  
Stiff Clay ◽  
Soil Foundation
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