Bearing capacity of shallow strip foundations on reinforced soil subjected to combined loading using upper bound theorem of finite element limit analysis and second-order cone programming

Izadi, Ardavan; Nalkiashari, Leila Ashouri; Payan, Meghdad; Chenari, Reza Jamshidi

doi:10.1016/j.compgeo.2023.105550

Cited by 14 publications

(2 citation statements)

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“…While their initial applications were focused on soil reinforcement, separation, filtration, and drainage [1,2], geosynthetics have since found expanded utility. They are now employed in preventing asphalt cracks [3,4], addressing significant settlement concerns beneath pile-supported embankments [5], fabricating stone columns [6], constructing shallow strip foundations [7,8], protecting pipelines [9], and reducing CO 2 [10], among other uses. In road infrastructure, geogrids are a common choice, specifically designed for enhancing load-bearing capacity and reducing soil settlement [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Triaxial Test of Coarse-Grained Soils Reinforced with One Layer of Geogrid

Zakarka,

Skuodis,

Dirgėlienė

2023

Applied Sciences

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Geosynthetics play a pivotal role in modern infrastructure projects, with geogrids serving as a common choice for enhancing bearing capacity and reducing soil settlement in road construction. This study investigates the influence of density and uniformity coefficients on geogrid-reinforced sandy and gravelly soils through a series of consolidated drained triaxial tests. The research covers six distinct soil types from Lithuania, each characterized by particle size distribution analysis and classified using various standards. A polyester biaxial geogrid is employed, and test specimens are prepared with and without geogrid reinforcement. Triaxial compression tests are performed at different cell pressures, mirroring real-world conditions in road construction. The results highlight the critical role of cell pressure in the reinforcement effect, with higher pressures reducing the geogrid’s influence. The study also emphasizes the importance of soil type, as gravel soils consistently exhibit higher deviatoric stress than sandy soils. Notably, the geogrid enhances cohesion but reduces the angle of internal friction in most cases. Overall, this research provides valuable insights into the intricate interplay between soil properties, geogrid reinforcement, and cell pressure, shedding light on the mechanical behavior of geosynthetic-reinforced soils in road construction applications.

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Section: Introductionmentioning

confidence: 99%

Triaxial Test of Coarse-Grained Soils Reinforced with One Layer of Geogrid

Zakarka,

Skuodis,

Dirgėlienė

2023

Applied Sciences

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“…With the rapid development of numerical simulation techniques, some scholars have conducted finite element analyses on reinforced soil foundations [16][17][18]. Wang et al [19] investigated the settlement of reinforced soil foundations using the discrete element method and visualized the load transfer as well as the spreading behavior of reinforced soil structures.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution for Bearing Capacity of Reinforced Strip Footings on Unsaturated Soils under Steady Flow

Kang,

Zhou

2023

Mathematics

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The study of analytical solutions for the bearing capacity of reinforced soil foundations is a very important topic in engineering mathematics. Existing evaluations of the foundation-bearing capacity on reinforced soils are based on dry conditions, while many foundations are located on unsaturated soils in real engineering. In this paper, a new formula for the bearing capacity of reinforced strip footings on unsaturated soils is presented. Two sliding failure mechanisms are constructed based on the position of the reinforcement layer relative to the sliding surface. The distribution of apparent cohesion in the depth direction is calculated by considering the effect of matrix suction. By additionally considering the work conducted by the reinforcement and the contribution of the apparent cohesion, the bearing capacity formula is obtained using the upper bound theorem of limit analysis. The bearing capacity solution is obtained by adopting the sequential quadratic programming (SQP) algorithm. Comparing the results under two failure mechanisms, the optimal bearing capacity and the optimal embedment depth of reinforcement are obtained. The results of this paper are consistent with those of the existing literature. Finally, the effects of reinforcement embedment depth, effective internal friction angle, uniform load, and unsaturated soil parameters on the optimal bearing capacity are investigated through parametric analysis. This paper provides useful recommendations for the engineering application of reinforced strip footings on unsaturated soils.

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