Experimental and numerical analysis of mechanical properties of geocell reinforced reclaimed construction waste composite base layer

Li, Wei; Han, Sen; Han, Xiao; Yao, Yangyi

doi:10.1016/j.conbuildmat.2021.124587

Cited by 14 publications

(7 citation statements)

References 27 publications

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“…As a new three-dimensional honeycomb-shaped reinforcement material, geocells are widely used in various engineering constructions, such as watercourses [1], foundations [2,3], embankments [4][5][6], and in slope protection [7,8] due to their significant economic advantages and successful performance. Compared with planar reinforcement materials, such as geogrids and geotextiles, geocells can provide better confinement [9][10][11] for infill materials, such as coarse sand and gravel, to enhance the bearing capacity and stability of the structure. Hence, geocell-reinforced structures have wide application prospects in railways, water conservancy, ports, and other fields.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on the Tensile Mechanical Behavior of HDPE Geocell Strip

Zuo¹,

Hao²,

Li³

et al. 2023

Sustainability

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Geocells are commonly adopted in various engineering constructions, such as railways and ports. Currently, the reinforcement effects and mechanisms of geocells in engineering is being widely studied, while limited studies have been performed on the mechanical behavior of geocell strips. Uncertainties regarding their performance have impeded the wide application of geocells in engineering fields. In this paper, a series of tensile tests and trapezoidal tests were performed on high-density polyethylene (HDPE) geocell strips. The effects regarding specimen shape, specimen width, and welding junction on the tensile mechanical behavior of HDPE geocell strips were investigated. Additionally, the results of the tensile test and trapezoidal test were also compared. The test results showed that the tensile strength of a HDPE geocell strip was less affected by the specimen shape and specimen width, within 5%. However, the elongation of HDPE strips was sensitive to the specimen shape, and the difference between type I dumbbell and type II rectangular was up to 38%. The effect of the welding junction on the HDPE strip cannot be ignored, the strength retention rate of the welding junction was 76.3%. The curve of the trapezoidal test was similar to that of the tensile test, and the force of trapezoidal test was 0.87 times that of the tensile test. The test results can provide a reference for the testing of strip performance and structural design.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations on the Tensile Mechanical Behavior of HDPE Geocell Strip

Zuo¹,

Hao²,

Li³

et al. 2023

Sustainability

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“…Further, Leshchinsky and Ling 26 , Biabani et al 27 , Ngo et al 28 , Siabil et al 29 used the square and hexagon pattern to calculate. The honeycomb shape (actual shape) was also adopted in recent years 17 , 19 , 30 . Overall, employing the actual shape of geocells in numerical models can accurately represent the behavior of geocell-reinforced soil beds, including pressure-settlement response and surface settlement/heave.…”

Section: Introductionmentioning

confidence: 99%

Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds

Zhao

Lü

Ji³

et al. 2023

Sci Rep

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This paper presents a comprehensive study on the numerical and parametric study of geocell-reinforced cohesive soil beds, focusing on different infill materials. The numerical calculations were validated against model test results using FLAC3D software. Subsequently, the verified model was expanded to the geocell-reinforced cohesive soil beds. Six cases were simulated to investigate the reinforced performance, including pressure-settlement responses, bearing capacity improvement factor, settlement reduction percentage, and surface deformation. The numerical findings emphasize that the significance of superior geocell reinforcement should not overshadow the consideration of soil infill’s mechanical properties. In the case of cohesive soil as the infill material, the poor improvement in geocell-reinforced performance may be attributed to its low modulus and cohesion. Parametric studies suggest that geocells significantly impact reinforced performance when the infill material consists of foundation soil with a higher modulus and lower cohesion. Further, according to this numerical study, cohesionless soil with a modulus of 20 MPa and friction of 40° is the optimum infill soil in pockets to reinforce cohesive soil beds.

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“…One major challenge [18] for geocellreinforced soil in a freeze-thaw environment is the large expansion and contraction of soil with a high water content. Based on the presence of texture and perforations on the surface of the geocell strip [19], the geocell strip can be classified into three categories: strip Geocells are used by expanding them into a honeycomb structure, securing them, and filling them with soil, gravel, or other fill material to form a structure with strong lateral confinement [20,21] and high stiffness [22,23]. Therefore, geocells are also referred to as cellular confinement systems.…”

Section: Introductionmentioning

confidence: 99%

“…Abdulmuttalip [16] investigated the effect of geocell reinforcement on the mechanical behavior of shell foundations and concluded that the geocell could reduce settlement by more than 70%. Li [23] studied the bearing capacity of geocell-reinforced reclaimed construction waste (RCW) and indicated that the geocell can significantly enhance the bearing capacity of RCW. Gedela [28] used a non-contact digital image to determine the load dispersion mechanism of the geocell.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Slit on the Mechanical Tearing Behavior of High-Density Polyethylene and Polyester Geocell Strips

Zuo,

Hao,

et al. 2023

Sustainability

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Geocells are widely applied in numerous infrastructure constructions, like heavy-haul railways and ports. The mechanical tearing behavior of a geocell strip is crucial to the stability of the geocell-reinforced soil structures. At present, extensive studies have been conducted on the tensile characteristics of geocell strips, while limited research has been performed to investigate the post-damage mechanical tearing behavior of geocell strips. Meanwhile, there is also a lack of research on the comparison of performance of strips before and after damage. In this paper, a series of trapezoidal tearing tests were performed on high-density polyethylene (HDPE) and polyester (PET) geocell strips. The tearing test results and failure mode of trapezoidal specimens with a slit were investigated, and the effect of the slit on the strength and deformation characteristics of the specimen were discussed by introducing the “damage ratio of tearing force (RTF)” and “damage ratio of tearing displacement (RTD)”. In addition, the mechanical tearing behavior of HDPE and PET trapezoidal specimens was also compared. The test results indicated that the failure mode of HDPE and PET specimens subjected to tearing force was ductile and brittle failure. The strength and deformation characteristics of post-damage HDPE and PET trapezoidal specimens decreased. The slit had a significant impact on the tearing displacement of HDPE and PET specimens, especially the post-peak tearing displacement. The post-peak tearing displacement of HDPE was 10.99 times that of PET. The peak tearing force of the HDPE specimen without the slit was about 1.61 times that of specimen with the slit. Before local tearing, the peak tearing force of the PET specimen without the slit was about 3.27 times that of the specimen with the slit. The strength damage to the HDPE and PET geocell strips caused by the slit was 38.0%, and 69.46%. The impact of the slit on the tearing force of the PET specimen was greater than that of the HDPE, and was 1.82 times for the HDPE. This study can enhance our understanding of the mechanical tearing behavior of the geocell strip after damage and develop effective mitigation measures.

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Experimental and numerical analysis of mechanical properties of geocell reinforced reclaimed construction waste composite base layer

Cited by 14 publications

References 27 publications

Experimental Investigations on the Tensile Mechanical Behavior of HDPE Geocell Strip

Experimental Investigations on the Tensile Mechanical Behavior of HDPE Geocell Strip

Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds

Effect of the Slit on the Mechanical Tearing Behavior of High-Density Polyethylene and Polyester Geocell Strips

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