Experimental investigation of the earth pressure distribution on buried pipes backfilled with tire-derived aggregate

Meguid, Mohamed A.; Youssef, Tarik A.

doi:10.1016/j.trgeo.2017.11.007

Cited by 39 publications

(9 citation statements)

References 21 publications

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“…Its use as a fill material in geoengineering requires large quantities of TDA, which can minimize damage to the environment. The positive application of these materials as backfill has been previously demonstrated (Ahn and Cheng, 2017;Meguid and Youssef, 2018;Chenari et al, 2019).…”

Section: Article History Abstractmentioning

confidence: 79%

“…The CEN Workshop Agreement (CWA, 2002) classifies the size of TDA into 11 sub-groups. Geotechnical applications such as for soil stabilization, seismic isolation systems and to decrease the earth pressure distribution on buried pipes have been reported (Meguid and Youssef, 2018). The form and size of TDA can vary according to the purpose from strips to shreds, chips, crumbs/granules and fine powder (Mohajerani et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Implementation of Recycled Tire-Derived Aggregate as a Lightweight Backfill for Retaining Walls

2021

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The study examined the use of recycled tire-derived aggregate (TDA) mixed with kaolin for retaining wall applications. The effects of the TDA content on the geotechnical properties of TDA-kaolin specimens such as the internal friction angle, maximum dry density (MDD), optimum moisture content (OMC) and saturated density (SD) were investigated. A total of 13 physical model tests were performed on a polymer concrete retaining wall using kaolin and TDA-kaolin mixtures as backfill material. Powdery, shredded, small-sized granular (1 − 4 mm) and large-sized granular (5 − 8 mm) TDA were mixed with kaolin at contents of 0%, 20%, 40%, and 60% by weight. The lateral wall displacement was measured on a fabricated steel strip footing close to the wall during loading. Lateral wall displacement also was simulated using finite element (FE) software (Optum G2). The results indicated that the addition of 60% TDA decreased the internal friction angle of the samples up to 8% compared to pure kaolin. In addition, the TDA particles caused the MDD of the TDA-kaolin samples to decrease up to 45%. The physical modeling results indicated that the kaolin samples mixed with 60% shredded TDA showed the highest elasticity in all tests at the failure moment of the footing.Retaining wall Kaolin Tire-derived aggregate (TDA) Numerical modeling Backfill CORRESPONDENCE Ali Dehghanbanadaki

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Section: Article History Abstractmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Sustainable Implementation of Recycled Tire-Derived Aggregate as a Lightweight Backfill for Retaining Walls

2021

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“…Meguid and Youssef [17] conducted a small-scale experiment to examine the efficiency of TDA when used as a layer to decrease the soil pressure applied to a buried uPVC pipe with a diameter of 150 mm. The pipe study considered only the effect of the soil weight (i.e., no traffic load was considered).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Use of Tire-Derived Aggregate in the Protection of Buried Concrete Pipes under Combined Soil and Traffic Loads

2023

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Tire-derived aggregate (TDA) has been used successfully as a backfill soil to reduce the applied stresses on buried steel pipes. The preceding study, however, paid no attention to inspecting the TDA efficiency of buried concrete pipes subjected to soil and traffic loads. In addition, it is not clear how the TDA material, traffic loading, burial depth, and road section affect the pipe-bending moment. Therefore, this paper examines the efficiency of TDA in reducing the bending moment of a 0.6 m concrete pipe subjected to combined soil and traffic loads using a validated three-dimensional finite element model. Two trench configurations have been constructed, the first is composed completely of well graded sand, and the second is similar to the first except for the 150 mm layer on the top of the pipe crown, which is replaced with TDA. Furthermore, three road sections (highway, public road, and unpaved road) have been adopted to provide an intensive understanding of the TDA effect for different road conditions. A parametric study is carried out to detect the effect of the burial depth, road section, and traffic load on the efficiency of the TDA of the buried pipe. It is observed that the TDA has no effect on the bending moment distribution around the pipe. Additionally, the TDA reduces the bending moment developed in the pipe wall with a percentage decrease range between 18% and 42% depending on the burial depth and road section. Furthermore, it is also found that the efficiency of the TDA in reducing the maximum bending moment decreases as the burial depth increases. In addition, the best performance for the TDA is found at a burial depth of 1.0 m for all road sections. Importantly, the best performance for the TDA is found for the highway section compared with the other sections, with a maximum percentage decrease of 42% compared to 27% for the public road section and 26% for the unpaved road section.

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“…Within this line of work, the use of ELTs has favoured the appearance of research focused on their application as lightweight filling of retaining walls [19][20][21][22]. For such applications, the behaviour of the retaining wall is conditioned by the lateral earth pressure, which is defined by the characteristics of the material (angle of internal friction and unit weight).…”

Section: Introductionmentioning

confidence: 99%

Use of Granulated Rubber Tyre Waste as Lightweight Backfill Material for Retaining Walls

et al. 2021

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The use of industrial waste in civil engineering applications constitutes a potential innovative effort to reduce environmental degradation and enable a sustainable use of natural resources. This paper reports a comprehensive laboratory study that was performed to evaluate the rubber granulates from End-of-Life Tyres (ELTs) as a lightweight backfill material in retaining walls. Various tests have been performed to provide specific information on the mechanical and physical properties of a detailed range of particle sizes smaller than 12 mm, with six different particle size distributions (S1: 0.0–0.8 mm/S2: 0.6–2.0 mm/S3: 2.0–4.0 mm/S4: 2.0–7.0 mm/S5: 90% 2.0–7.0 mm + 10% 0.6–2.0 mm/S6: 50% 2.0–7.0 mm + 50% 0.6–2.0 mm). The density and unit weight, compaction energy, compressibility, shear strength, and deformability have been evaluated to determine their performance. As a main conclusion, the research confirms that rubber granulates from ELTs possess great potential as backfill material behind retaining walls. The characteristic values of the geotechnical parameters have been estimated according to Eurocode 7. The friction angle results range from 18.27 to 23.21 degrees, and the cohesion results are wide-ranging, with values from 9.35 to 17.83 kPa. For this reason, two cantilever L-shaped retaining walls, selected as representative case studies, have been tested with these sample properties. The results of the geotechnical verifications are presented together with a comparison of the safety factors in accordance with the Spanish standard design (CTE-DB-SE-C) and the European (EC7-1) regulations. The calculations indicate that the overdesign factors (ODF) achieved in the verifications using the material properties of the S4, S5, and S6 combination improve the calculation results obtained if a conventional filler material such as sand is considered.

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Experimental investigation of the earth pressure distribution on buried pipes backfilled with tire-derived aggregate

Cited by 39 publications

References 21 publications

Sustainable Implementation of Recycled Tire-Derived Aggregate as a Lightweight Backfill for Retaining Walls

Sustainable Implementation of Recycled Tire-Derived Aggregate as a Lightweight Backfill for Retaining Walls

Sustainable Use of Tire-Derived Aggregate in the Protection of Buried Concrete Pipes under Combined Soil and Traffic Loads

Use of Granulated Rubber Tyre Waste as Lightweight Backfill Material for Retaining Walls

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