Inspection and Risk Assessment of Mechanically Stabilized Earth Walls Supporting Bridge Abutments

Tarawneh, Bashar; Bodour, Wassel Al; Masada, Teruhisa

doi:10.1061/(asce)cf.1943-5509.0001132

Cited by 12 publications

(2 citation statements)

References 8 publications

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“…The selected sites, which were natural slopes, previously suffered from shallow slope instabilities, have been rectified using hybrid mitigation measures involving geosynthetically reinforced soil (GRS) wall and bio-slope stabilization. Failures of some GRS walls due to soil erosion in the toe area has been reported in the literature [29]. Vetiver grass system has thus been used to improve slope stability and reduce soil erosion below the toe of GRS wall in these studied sites.…”

Section: Introductionmentioning

confidence: 86%

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Rajamanthri

Jotisankasa

Aramrak

2021

Int. J. of Geosynth. and Ground Eng.

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Root biomass and plant age have been recognized to influence the hydro-mechanical properties of root-permeated soils, but its direct field observation was scarce. In this study, influences of Chrysopogon zizanioides (vetiver grass) of various plant ages (up to 2 years) on soil-water retention curves (SWRCs), saturated permeability, specific water-retention capacity and soil aggregate stability have been investigated. Undisturbed soil samples were obtained at different locations, representing the root zone, upslope, and downslope from the vetiver hedgerow at three bio-engineered slopes in Western Thailand. As root biomass increased, air-entry suction of soil slightly decreased, and porosity significantly increased due to the formation of macropores and aggregated soil structure in the root zone (0-15 cm depth). Nevertheless, below the root zone (15-25 cm depth), the air-entry suction of soil increased with root biomass due to the occupancy of soil pores by roots. Saturated permeability shows a positive correlation with plant age in the root zone, while a slightly negative correlation was found below the root zone. The upslope and downslope soil samples showed a negative correlation due to the effect of sediment trap. The specific water retention capacity and soil aggregate stability became higher in the root zone and positively correlated with plant age.

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Section: Introductionmentioning

confidence: 86%

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Rajamanthri

Jotisankasa

Aramrak

2021

Int. J. of Geosynth. and Ground Eng.

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“…Tatsuoka et al [47] reported a practical case where the toe of a geosynthetic railway embankment in the mountains of Kyushu, Japan experienced strong scour and erosion caused by flooding. Tarawneh et al [48] reported that about 13% of 339 reinforced soil walls supporting bridge abutments inspected in the state of Ohio, USA experienced soil erosion at the wall toe. In these extreme cases, the shear strength of the interfaces at the wall toe must have reduced sharply, resulting in a significant decrease in the toe resistance.…”

Section: Influence Factors Of the Toe Load Ratiomentioning

confidence: 99%

Prediction of Reinforcement Connection Loads in Geosynthetic Reinforced Segmental Retaining Walls Using Response Surface Method

Zhang

Chen

2023

Applied Sciences

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This paper presents an improved earth pressure method that considers the capacity of a wall toe to carry an earth load to predict the connection loads of GRS segmental walls constructed with cohesionless backfills on competent foundations. In this method, a response surface model (RSM) of the lateral earth pressure coefficient replaces the Coulomb active earth pressure coefficient. The parameters of the RSM were determined from numerical studies on the impacts of toe restraint, wall geometry, and backfill properties on the distribution of earth loads between the toe and reinforcement layers. The unknown coefficients of the RSM were obtained through a regression analysis of 705 reinforcement load values from 65 simulated walls. The proposed method was compared to the earth pressure method and the stiffness method using measured connection loads from field and centrifuge GRS segmental walls. The results show that the predictions of the proposed RSM method are in better agreement with the measurements than those of the stiffness method and the earth pressure method, whether under a typical or poor toe restraint condition.

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Pre-stressed Segmental Retaining Walls (PSRWs)

Hassanli

Karim

Rahman

et al. 2018

Sustainable Civil Infrastructures

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Inspection and Risk Assessment of Mechanically Stabilized Earth Walls Supporting Bridge Abutments

Cited by 12 publications

References 8 publications

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Effects of Chrysopogon zizanioides root biomass and plant age on hydro-mechanical behavior of root-permeated soils

Prediction of Reinforcement Connection Loads in Geosynthetic Reinforced Segmental Retaining Walls Using Response Surface Method

Pre-stressed Segmental Retaining Walls (PSRWs)

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