Load-Deformation Behavior of Geosynthetic-Reinforced Retaining Walls with Limited Fill Space Under Static Footing Loading

Kakrasul, Jamal I.; Han, Jie; Rahmaninezhad, S. Mustapha

doi:10.1007/s40515-020-00132-9

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…Based on the experimental studies on load-deformation behavior of MSE walls with limited fill space under static footing loading, Kakrasul et al (2020) reported that connection of the reinforcement layers to the stable retained medium resulted in a significant reduction in the lateral deformation of the wall facing. They recommended either rear end connection or upwards bending of soil reinforcement in case of MSE walls constructed in limited fill width.…”

Section: Literature Reviewmentioning

confidence: 99%

Experience from design & construction of a stable feature MSE wall in Dubai

Jayakrishnan¹,

Thiyyakkandi

Mottadelli³

et al. 2023

E3S Web Conf.

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There has been continued development of various methods for mechanically stabilized earth (MSE) wall construction, often by specialized system providers, to solve problems when the available width of reinforced fill is highly restricted. The design manual FHWA-NHI-10-024 permits to reduce the length of soil reinforcements up to 30% of wall height in shored or stable featured walls. There are many instances where the available width is much less than the limits by design standards, necessitating innovative approaches. The current project involves constructing a link road as a diversion at the middle of an existing 6m high ramp made of concrete wall. The new ramp will be retained by MSE wall that will be joined to the old concrete wall within tight space limitations. To accomplish this 'stable feature MSE wall' within narrow space, it was imperative to adopt a novel method of actively connecting geogrid reinforcements and modular block fascia to existing concrete wall. This paper presents the challenges in designing a stable feature MSE wall in extremely narrow space. The presented approach of connecting the soil reinforcement to the concrete anchors was a determining factor in the project and could therefore be adopted for future projects under similar conditions.

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Section: Literature Reviewmentioning

confidence: 99%

Experience from design & construction of a stable feature MSE wall in Dubai

Jayakrishnan¹,

Thiyyakkandi

Mottadelli³

et al. 2023

E3S Web Conf.

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“…The use of geosynthetics to stabilize the base aggregate and to reduce the load distributed on the weak subgrade in the road projects has been investigated by several researchers (Giroud and Han, 2004a;Giroud and Han, 2004b;Sun et al, 2015;Correia and Zornberg, 2016;Sun and Han, 2019a;Sun and Han, 2019b;Sun et al, 2020a;Sun et al, 2020b). Other research has also been conducted on using geosynthetics in mechanically stabilized earth (MSE) walls and geosynthetic-reinforced soils (GRS) (Karpurapu and Bathurst, 1995;Shen et al, 2019;Kakrasul et al, 2020;Liu et al, 2022;Jawad et al, 2020;.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of performance of geo-mat system on weak to intermediate subgrade

Jawad,

Han,

Liu

2024

Front. Built Environ.

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Geo-mat system is considered as an alternative to a flexible or rigid pavement that can be used for fire lanes, parking areas, or roadway shoulders for cars, pickup trucks, utility/delivery trucks, and fire trucks. Also, it can be used to reduce the thickness of the base course in unpaved roads. In this investigation, six cyclic loading tests were conducted to assess the efficacy of the geo-mat system on weak to intermediate subgrade layers, characterized by California Bearing Ratios (CBR) of 2%, 3%, and 4%. Control sections, consisting of a 300-mm thick base course over subgrade layers with CBR values of 2% or 4%, were compared against the test sections comprising a geo-mat system placed atop aggregates of varied thickness (150 or 50 mm) on a geotextile layer over the same subgrade layers. Each test section underwent cyclic loading, progressively increasing from 17.8 to 71.2 kN using a 300-mm diameter steel plate. The results demonstrate that the geo-mat system, particularly when placed over a 150 mm-thick aggregate base, exhibited comparable or superior performance to the control sections with a 300 mm thickness, especially under substantial cyclic loading. This was evidenced by the reduced permanent deformations beneath the loading plate and a wider load distribution. The increase of the subgrade CBR value reduced the permanent deformation significantly. When the intermediate subgrade with a 4% CBR was used, the geo-mat system played a more important role than the aggregate base and the base thickness had a minor effect on the performance.

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“…Comparing the load deformation behavior of a geosynthetic-reinforced structure constructed with very short and long homogeneous reinforcement layouts, ref. [24] found that limiting the length of the retained zone affects the internal stability of the wall and the wall deformation.…”

Section: Introductionmentioning

confidence: 99%

Influence of Heterogeneous Arrangements of Reinforcements’ Length and Stiffness on the Deformation of Instrumented Geosynthetic-Reinforced Retaining Walls Constructed with Sustainable Locally Available Backfill Soils

2023

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Sustainable solutions involving geosynthetic-reinforced soil walls have been achieved in projects that use locally available backfill materials and a reduced volume of geosynthetic reinforcements. Different arrangements of reinforcements can be adopted to reduce the volume of geosynthetics. This paper reports the deformation measurements taken from four instrumented geosynthetic-reinforced soil walls constructed with different arrangements of reinforcement layers including different lengths and tensile properties. The deformation of walls with rigid reinforcements at lower elevations and more flexible at upper portions of the wall height was compared to walls with a uniform distribution of reinforcement layers. Similarly, the effect of the nonuniformity of reinforcement lengths along the wall height was also evaluated. Relatively short reinforcements (L/H < 0.7) used at deeper reinforced layers were observed to overload the upper reinforcement layers resulting in mobilized loads higher than expected, resulting in increases of approximately 80% in the wall’s deformation. In contrast, the use of rigid reinforcements at lower layers led to a reduction in facing displacements of 50% at lower instrumented layers and of 60% at upper instrumented layers. The distribution pattern of facing displacements, reinforcement-mobilized loads and strains along the wall height was significantly affected by the adoption of heterogeneous reinforced layers.

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Load-Deformation Behavior of Geosynthetic-Reinforced Retaining Walls with Limited Fill Space Under Static Footing Loading

Cited by 13 publications

References 20 publications

Experience from design & construction of a stable feature MSE wall in Dubai

Experience from design & construction of a stable feature MSE wall in Dubai

Experimental evaluation of performance of geo-mat system on weak to intermediate subgrade

Influence of Heterogeneous Arrangements of Reinforcements’ Length and Stiffness on the Deformation of Instrumented Geosynthetic-Reinforced Retaining Walls Constructed with Sustainable Locally Available Backfill Soils

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