Behaviour of model footing resting on sand bed reinforced with multi-directional reinforcing elements

Harikumar, M.; Sankar, N.; Chandrakaran, S.

doi:10.1016/j.geotexmem.2016.03.008

Cited by 44 publications

(5 citation statements)

References 32 publications

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“…BCR is defined as the ratio of footing ultimate bearing load intensity for reinforced sand (Q reinforced ) to footing ultimate bearing load intensity for unreinforced (Q unreinforced ) sand. The ultimate load intensities for footing-soil system have been obtained from load intensity-settlement curves at 25mm settlement (IS:1888 [16], Harikumar et al [15]). The SRF can be calculated as (Roy and Deb [27], Demir et al [9]) as follows:…”

Section: Resultsmentioning

confidence: 99%

Behavior of Vertically Confined Square Footing on Reinforced Sand under Centric Inclined Loading

Kirtimayee

Samadhiya

2022

Studia Geotechnica Et Mechanica

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This study presents the behavior of vertically confined square footing on geogrid-reinforced sand under centric inclined loading through a series of experimental tests. The load was applied at 5°, 10° and 20° angles of inclination with the vertical. The tests were conducted on surface footing, footing with confiner and footing with confiner and horizontal reinforcement configurations subjected to inclined loading. Parametric variations like depth of the confiner (d=1B, 1.5B, 2B), number of geogrid layers (N; varies with variation in depth of confiner), and spacing between horizontal reinforcements (Y=0.25B, 0.5B, 0.75B, 1B) have been investigated at the top surface dimension of confiner (D) as 1.0B, 1.5B and 2.0B (where B is the width of the model footing). Results show that combined effect of confiner and horizontal reinforcement increases the ultimate bearing capacity of footing significantly compared to only confiner for all angle of inclinations. It can also be observed that load bearing capacities decrease with increase in angles of inclination and record the minimum improvement at 20° angle of inclination. Improvement in bearing capacities and reduction in settlement of footing analyzed in terms of bearing capacity ratio (BCR) and settlement reduction factor (SRF) are compared for all footing configurations. To summarize, the test results showed that confiner along with reinforcement can be considered as an economic ground improvement technique for shallow foundations to counter against heavily inclined loading.

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Section: Resultsmentioning

confidence: 99%

Behavior of Vertically Confined Square Footing on Reinforced Sand under Centric Inclined Loading

Kirtimayee

Samadhiya

2022

Studia Geotechnica Et Mechanica

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“…An optimum depth should be used to have a significant improvement by reinforcements. In the literature generally one type of reinforcement was used to see the effects of reinforcement [32], but in this study the tests were conducted by using different type of reinforcement materials. For geotextile, and both geogrids behave perfectly when the first reinforcement layer is almost u=B/2.…”

Section: Test Resultsmentioning

confidence: 99%

Effects of the first reinforcement depth for different types of geosynthetics

2017

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In this study, the performance of the first reinforcement layer depth for sand subbase of a road or construction was investigated with plate load laboratory tests. Unreinforced and reinforced experiments for different reinforcement types were made by changing the first reinforcement layer depth ratio. One type of geotextile and two different geogrid specimens were used in the research. Load-settlement curves and Bearing Ratios were studied by measuring the results for different settlement ratios. Finally, laboratory measurements of unreinforced and reinforced soil using geotextile reinforcement were compared with Finite Element Model (FEM) analyses modeled under similar conditions. The results demonstrated the effects of different types of reinforcements for different first reinforcement layer locations. The number of reinforcement layers was another parameter which affected the bearing ratio along with the first reinforcement layer depths. It was also observed that the Bearing Ratio (BR) and load-settlement behavior changed significantly with the first reinforcement depth and settlements. Effects on failure modes for unreinforced and reinforced sand soils were compared for each test.

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“…The complex task of predicting the bearing capacity of shallow foundations lying on geosynthetic-reinforced soils was recently analyzed using AI techniques [30][31][32][33][34]. Other studies focused on analyzing the bearing capacity of shallow foundations on natural slopes using machine learning (ML) techniques [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

On the Potential of Using Random Forest Models to Estimate the Seismic Bearing Capacity of Strip Footings Positioned on the Crest of Geosynthetic-Reinforced Soil Structures

Ausilio,

Durante,

Zimmaro

2023

Geosciences

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Geosynthetic-reinforced soil structures are often used to support shallow foundations of various infrastructure systems including bridges, railways, and highways. When such infrastructures are located in seismic areas, their performance is linked to the seismic bearing capacity of the foundation. Various approaches can be used to calculate this quantity such as analytical solutions and advanced numerical models. Building upon a robust upper bound limit analysis, we created a database comprising 732 samples. The database was then used to train and test a model based on a random forest machine learning algorithm. The trained random forest model was used to develop a publicly available web application that can be readily used by researchers and practitioners. The model considers the following input factors: (1) the ratio of the distance of the foundation from the edge and the width of the foundation (D/B), (2) the slope angle (β), (3) the horizontal seismic intensity coefficient (kh), and (4) the dimensionless geosynthetic factor, which accounts for the tensile strength of the geosynthetic. Leveraging the model developed in this study, we show that the most important features to predict the seismic bearing capacity of strip footings positioned on the crest of geosynthetic-reinforced soil structures are D/B and kh.

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Behaviour of model footing resting on sand bed reinforced with multi-directional reinforcing elements

Cited by 44 publications

References 32 publications

Behavior of Vertically Confined Square Footing on Reinforced Sand under Centric Inclined Loading

Behavior of Vertically Confined Square Footing on Reinforced Sand under Centric Inclined Loading

Effects of the first reinforcement depth for different types of geosynthetics

On the Potential of Using Random Forest Models to Estimate the Seismic Bearing Capacity of Strip Footings Positioned on the Crest of Geosynthetic-Reinforced Soil Structures

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