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Mechanical characteristics of geogrids produced from recycled polyester Geosynth. Int. (IF 4.5) Pub Date : 2024-03-28 G. T. Mehrjardi, R. Fuentes, O. Detert
The use of recycled polyester (rPET) in construction materials offers significant benefits, including energy conservation, cost reduction, and decreased solid waste. This study compares the performance of rPET with that of virgin polyester (vPET) products. Therefore, two main testing programs including pull-out tests and creep performance tests were carried out in order to determine the interfacial
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Geotextile filters: from idealization to real behaviour (Giroud Lecture 2023) Geosynth. Int. (IF 4.5) Pub Date : 2024-03-28 E. M. Palmeira
Geotextiles have been used as filters in geotechnical and geoenvironmental works for decades. Despite their broad utilization, these filters still find obstacles to the expansion of their application in larger projects and under complex soil and flow conditions. However, environmental issues are increasingly pressing for a greater use of geotextile filters in substitution to natural granular materials
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Vacuum consolidation of dredged slurry improved by horizontal drainage-enhanced geotextile Geosynth. Int. (IF 4.5) Pub Date : 2024-03-23 J. Wang, R. Anda, H. Fu, X. Hu, X. Li, Y. Cai
The vacuum consolidation behavior of dredged slurry improved by horizontal drainage-enhanced geotextile (HDeG) application was investigated. For comparison, vacuum consolidation tests using a prefabricated vertical drain (PVD) and layered prefabricated horizontal drains (PHDs) were conducted. Based on the test results, it was found that by using HDeG, the consolidation rate of the dredged slurry was
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Rubber-sand infilled soilbags as seismic isolation cushions: experimental validation Geosynth. Int. (IF 4.5) Pub Date : 2024-03-23 J. Wang, M. Wu, F. Liu, J. Bin, J. He
This study proposes the use of soil bags filled with a rubber sand mixture (SFRSM) to address the issue of weak stability associated with rubber-sand layers for seismic isolation. To evaluate the dynamic characteristics of the SFRSM, large-scale cyclic simple shear tests were conducted to investigate the effects of rubber content, vertical pressure, shear displacement amplitude, fill percentage, and
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Natural weathering effects of nonwoven geotextile exposed to different climate conditions Geosynth. Int. (IF 4.5) Pub Date : 2024-03-23 J. L. E. Dias Filho, J. L. Silva, C. A. Valentin, M. P. Fleury, M. A. Aparicio-Ardila, D. M. Vidal, C. M. L. Costa
Humidity, air temperature, rainfall and solar radiation all contribute to the weathering of geosynthetics. Over time, the useful life can be affected and changes in properties can be observed, which affects the performance of these materials. As geosynthetics durability analyses must encompass each work condition, assessing the climate effects is essential for design purposes. This study exposed a
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Response of anchor foundations in geogrid reinforced sand under combined loads Geosynth. Int. (IF 4.5) Pub Date : 2024-03-20 S. Mukherjee, G. L. Sivakumar Babu
The use of geogrid reinforcement has proven to be an effective measure to improve the anchor uplift capacity. However, previous studies are limited to analyzing the axial pullout capacity of plate anchors. In comparison, the anchor foundations employed in field are compelled to resist both uplift and lateral forces. In most cases, the foundation's safety against lateral forces dictates the design criteria
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Analytical model for geotextile-enhanced horizontal drain vacuum consolidation of slurries Geosynth. Int. (IF 4.5) Pub Date : 2024-03-23 S. Liu, R. Zhang, J. Cheng, X. Geng, J. Zheng, K. Cheng
Horizontal drains are gradually introduced to the vacuum preloading method to improve dredged slurries by adding geotextiles to alleviate the blockage in the consolidation process. This study considers the consolidation of slurries enhanced by the vacuum preloading method with geotextile combined horizontal drains based on a double-layered consolidation model. The model approximates geotextile as a
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Impact of differential settlement on leakage through geomembranes in waste covers Geosynth. Int. (IF 4.5) Pub Date : 2024-03-21 Y. H. Fan, R. Kerry Rowe, R. W. I. Brachman, J. Van Gulck
To quantify the effects of differential settlement on leakage through a geomembrane (GMB) hole in waste (landfill/mine tailings) covers, field experiments were conducted at Queen's University Experimental Liner Test Site on two sections, each with a 4H : 1V slope. Over 13 months, measurements showed that a 3 m × 2 m × 0.12–0.17 m depression in Section B led to a 51-fold increase in leakage when compared
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Ultimate bearing capacity of geosynthetic reinforced soil abutment centrifuge model tests Geosynth. Int. (IF 4.5) Pub Date : 2024-03-13 C. Zhao, C. Xu, Y. Yang, Q. Wang, C. Du, G. Li
Five centrifuge models of geosynthetic reinforced soil (GRS) abutments with segmental block facing were loaded in the acceleration field under plane strain condition. Influencing factors including reinforcement tensile strength, setback and bearing area width were considered and analysed. Results show that the abutment with stronger reinforcement remained stable under the maximum loading capacity.
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Ternary medium constitutive model of frozen rubber-reinforced expansive soil Geosynth. Int. (IF 4.5) Pub Date : 2024-03-12 Z. Yang, Z. Cheng, G. Cai, X. Ling, W. Shi
The application of waste rubber for soil improvement is feasible, and the static and dynamic properties of rubber-reinforced soils have been extensively studied. However, the mechanical properties of frozen rubber-reinforced expansive soils have not been effectively studied due to the complexity of multiphase media under the action of multiple fields, and no applicable constitutive models describe
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Deformation characteristics and creep behaviour of rigid particulates-EPS beads composites Geosynth. Int. (IF 4.5) Pub Date : 2024-03-11 R. Khorrami, M. M. Tochaee, M. Payan, R. Jamshidi Chenari
The compression behaviour of the mixture of glass beads (representing rigid particles) and EPS beads (representing deformable particles) during the loading-unloading process is systematically examined through performing two sets of large-size oedometer experiments, including incremental step-by-step and one-step loading scenarios. At each step during the loading-unloading cycle, the void ratio (e)
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Response of shallow foundations in tire derived aggregate Geosynth. Int. (IF 4.5) Pub Date : 2024-03-09 A. A. Yarahuaman, J. S. McCartney
This study investigates the quasi-static bearing stress-settlement response of shallow foundations in monolithic tire derived aggregate (TDA) layers having a total thickness of 3 m using a large-scale container and loading system. Tests were performed on footings having a range of widths, embedment depths, shapes, and loading inclinations. In tests where tilting was restricted, a clear bearing capacity
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Cumulative deformation behavior of GRS bridge abutments under cyclic traffic loading Geosynth. Int. (IF 4.5) Pub Date : 2024-03-07 Y. Jia, J. Zhang, L. Tong, J.-J. Zheng, Y. Zheng
This paper presents an experimental study on reduced scale geosynthetic reinforced soil (GRS) abutment models subjected to cyclic traffic loading, aimed at investigating the influences of cyclic load amplitude, self-weight of bridge superstructure, and reinforcement vertical spacing on the cumulative deformations. The GRS abutment models were constructed using sand backfill and geogrid reinforcement
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Behavior of back-to-back mechanically stabilized earth walls as railway embankments Geosynth. Int. (IF 4.5) Pub Date : 2024-03-06 M. Yazdandoust, F. Daftari
Twelve physical model tests were carried out to investigate the role of the type and arrangement of reinforcements on the behavior of back-to-back mechanically stabilized earth walls (BBMSEWs) supporting railway tracks. Six metal-strip reinforced BBMSEW models and six geogrid reinforced models were prepared with different reinforcement arrangements and then were vertically loaded to failure using wooden
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Influence of roots on the hydro-mechanical performance of a drainage geocomposite Geosynth. Int. (IF 4.5) Pub Date : 2024-03-01 A. Amato, F. Cafaro, D. Cazzuffi, P. Recalcati
Geosynthetics are increasingly used in geotechnical works in association with vegetation, whose function has been typically considered as an improvement for the works themselves, especially due to the mechanical and hydraulic effects the root system provides. Within this context, the paper presents an experimental study performed to evaluate the long-term performance of geosynthetics, specifically
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Observations on tensile testing of intact and slitted geotextiles through image analysis Geosynth. Int. (IF 4.5) Pub Date : 2024-03-01 C. Bambhaniya, J. T. Chavda, J. B. Patel
Geotextiles are widely used as reinforcing elements in many geotechnical engineering applications such as mechanically stabilized earth walls, reinforced soil slopes, capping of high-water content clays in landfills, reinforced embankments for railways and roadways, and so on. The ultimate strength of geotextile is obtained from the load-displacement plot; however, the failure mechanism evaluation
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Uniaxial compression test of cement-solidified dredged slurry columns encased with geogrid Geosynth. Int. (IF 4.5) Pub Date : 2024-03-01 C. C. Qiu, G. Z. Xu, G. Q. Gu, W. Z. Song, D. H. Cao
This study investigated the performance of unreinforced and geogrid-encased cement-stabilized dredged slurry columns by uniaxial compression tests to simulate the extreme case where the surrounding soil offers no confinement. The objective was to understand the strength characteristics and visualize the deformation damage patterns of the columns with respect to the water content, cement content, length-to-diameter
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Semi-analytical model for axisymmetric transport of contaminant through flawed geomembrane Geosynth. Int. (IF 4.5) Pub Date : 2024-01-24 T. Li, D. Sun, P. Ni, Z. Chen, L. Wang
Geomembrane (GM) is a kind of cost-efficient material for pollutant barriers in landfills, while defects can occur during the installation or service periods, resulting in a mixed-type boundary condition (MTBC) at the top surface of the underlying soil layer (SL). In this study, a novel boundary transform method is employed to handle the MTBC problem of axisymmetric transport of organic contaminant
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Equivalent analytical models for assessment of landfill composite liners Geosynth. Int. (IF 4.5) Pub Date : 2024-01-17 H. Xie, W. Xu, L. Wang, H. Yan, J. Wu
An equivalent analytical model based on time moments is proposed to estimate the properties of landfill composite liners. The service performance of landfill liners composed of a geomembrane layer (GMBL), a geosynthetic clay layer (GCL), and an attenuation layer (AL) and a GMBL, compacted clay layer (CCL), and AL were equivalently analyzed. The equivalent analysis and quantitative correlation of contaminants
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Combined bearing capacity of footings on geogrid-reinforced granular fill over soft clay Geosynth. Int. (IF 4.5) Pub Date : 2024-01-17 M. Fatehi, B. Yaghoobi, M. Payan, I. Hosseinpour, R. Jamshidi Chenari
The current study investigates the ultimate bearing capacity of obliquely/eccentrically loaded shallow strip foundations resting on a geogrid-reinforced granular fill with limited thickness over a very soft to soft clay layer. To this end, the lower bound theorems of the finite element limit analysis (FELA) and second-order cone programming (SOCP) are effectively exploited to simulate the underlying
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Extrapolating residual GMX/GDC interface strength from direct shear tests Geosynth. Int. (IF 4.5) Pub Date : 2024-01-09 J. Lin, T. D. Stark, A. Idries
Residual interface strength is mobilized along sideslopes of geosynthetic lined areas, such as landfill sideslope. Unfortunately, only the large displacement (LD) interface strength is measured in frequently used direct shear tests, which overpredicts the residual interface strength by about 40% because of limited continuous shear displacement and new geomembrane being introduced during the test. Commercial
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Effect of oxidative ageing on stiffness improvement factor for HDPE and PET geogrids Geosynth. Int. (IF 4.5) Pub Date : 2024-01-08 M. S. Morsy, A. M. Elhanafy, S. S. Fathelbab, S. M. Ahmed
The effect of thermal-oxidative ageing on in-isolation and in-soil stiffness is investigated for two high-density polyethylene (HDPE) and two polyester (PET) geogrids when incubated in an oven at 90°C. It is shown that the in-isolation and in-soil stiffness of three out of the four geogrids decreased during the 4-month ageing time with a faster degradation of the two PET geogrids. In contrast, one
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Study on performance of geocell-reinforced red clay subgrade Geosynth. Int. (IF 4.5) Pub Date : 2024-01-08 X. W. Luo, Z. Lu, J. B. Zhang, H. L. Yao
Three comparative treatment plans are used to study the effect of red clay subgrade reinforced with geocell. Multiple subgrade test methods including Benkelman beam, portable falling weight deflectometer, dynamic cone penetrometer and standard vehicle load tests are adopted in the field tests. Test results show that the application of geocell in red clay subgrade can enhance the overall stiffness and
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Response of sensor-enabled piezoelectric geobelt reinforced soil pullout friction signals Geosynth. Int. (IF 4.5) Pub Date : 2024-01-08 Y. Rao, Z. Liu, G. Ding, Z. Gao, J. Wang, H. Wang, X. Wu
Geosynthetics are widely used in soil reinforcement engineering, the failure modes of which are typically pullout modes. However, current research on monitoring the pullout damage experienced by reinforced soil is limited. Accordingly, in this study, the stress variation laws and signal output characteristics of a sensor-enabled piezoelectric geobelt (SPGB) that can capture the tensile vibration signals
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Evaluating stability of rigid-column-supported and geosynthetic-reinforced embankments Geosynth. Int. (IF 4.5) Pub Date : 2024-01-04 H. Liu, Q. Luo, M. H. El Naggar, K. Liu, T. Wang
Field observations and centrifuge tests indicate that progressive column bending failure accompanies most instabilities of rigid-column-supported and geosynthetic-reinforced (RCGR) embankments. However, recognized guidelines specifically for evaluating the overall stability of such systems featuring bending failure remain limited. A general methodology to calculate the factor of safety (FS) for RCGR
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Dynamic properties of frozen rubber-reinforced expansive soils under confining pressure Geosynth. Int. (IF 4.5) Pub Date : 2023-11-17 Z. Yang, Z. Cheng, Y. Cui, X. Ling, W. Shi
In recent years, waste rubber has been increasingly utilized to enhance the performance of expansive soil foundations. This study aims to investigate the influence of rubber powder on the dynamic characteristics of frozen rubber-reinforced expansive soils (RRES) in permafrost regions. Temperature-controlled dynamic triaxial tests were conducted on RRES samples, varying rubber content, freezing temperatures
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Modular polymer stormwater collection structure response to one-week design-truck load Geosynth. Int. (IF 4.5) Pub Date : 2023-11-14 R. W. I. Brachman, A. Zarpeima, J. M. LeBlanc
Full-scale physical modelling was used to evaluate the response of modular polymer stormwater collection structures when subjected to design-truck loading that was sustained for 1 week (i.e. a parked vehicle) and when buried with minimum soil cover. Surface loading was applied on a steel load pad that simulates one-half of the AASHTO design-truck single-axle that was held constant for 1 week to assess
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Investigation on dynamic performance of soilbag cushion using shaking table tests Geosynth. Int. (IF 4.5) Pub Date : 2023-11-09 B. X. Fang, S. H. Liu, Y. Lu, S. Chen, Y. G. Zhang, C. C. Zhang, C. B. Zhang
Soilbag cushion is one of the promising base isolation methods to reduce seismic energy transfer from ground to building structure. In this study, a series of shaking table tests were conducted comparatively on foundation models with soilbag cushion and sand cushion to evaluate their dynamic performance. The test results indicate that soilbag cushion could significantly reduce acceleration response
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Assessment of the stress crack resistance of multilayered textured HDPE geomembranes Geosynth. Int. (IF 4.5) Pub Date : 2023-10-18 F. B. Abdelaal, M. Zafari, R. K. Rowe
The stress crack resistance (SCR) of different multilayered textured geomembranes (GMBs) immersed in synthetic municipal solid waste leachate at 55°C and 85°C for 50 months was assessed using their smooth edge or smooth equivalent GMBs made from the same formulation as textured GMBs. The difference between the actual thickness of the smooth edge and the nominal thickness of the GMB was shown to result
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Durability of geogrid in a sloped reinforced soil wall after 25 years in service Geosynth. Int. (IF 4.5) Pub Date : 2023-10-18 V. S. Quinteros, R. J. Fannin
The durability of geogrid reinforcement exhumed after 25 years from a sloped wall structure was examined through a comparison of the material properties of exhumed samples with technical data for the original product type. Visual and microscopic inspections found no evidence of installation damage. Analysis of strain increments in rapid loading creep tests to 10 000 h showed excellent agreement between
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Probabilistic analysis for the reinforced fill over void problem Geosynth. Int. (IF 4.5) Pub Date : 2023-10-10 R. J. Bathurst, F. M. Naftchali
Analytical and numerical solutions for the problem of geosynthetic-reinforced fills over a void have been the subject of investigation for the last four decades. A common feature of this prior work is that all methods have treated the analytical solutions as deterministic. While the treatment of some input parameters must be taken as deterministic, there are other parameters that have uncertainty.
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Filtration behaviour of staple fibre geotextiles under unequal biaxial tensile strains Geosynth. Int. (IF 4.5) Pub Date : 2023-10-06 L. Tang, W. Francey, J. Zheng, X. Wang, X. Luo
Gradient ratio tests were conducted to investigate the filtration behaviour of staple fibre needle-punched nonwoven geotextiles subjected to unequal biaxial tensile strains. Three groups of biaxial tensile strains were designed, with the ratios of the strain in the machine direction to that in the cross-machine direction set to 1, 2, and 4, respectively. The strains in the machine direction in the
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Modeling geogrid-stabilized aggregate base courses considering local stiffness enhancement Geosynth. Int. (IF 4.5) Pub Date : 2023-09-28 Y.-H. Byun, I. I. A. Qamhia, M. Kang, E. Tutumluer, M. H. Wayne
Lateral restraint is the primary stabilization mechanism associated with the interlocking of aggregate particles in the geogrid apertures. This paper presents findings from a laboratory study which quantifies the local stiffness enhancement of aggregates through micromechanical interlocking provided by two different types of geogrids. These findings are applied to model the resilient response characteristics
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Antioxidant-stabilizer depletion of 4 HDPE geomembranes with high HP-OIT in MSW leachate Geosynth. Int. (IF 4.5) Pub Date : 2023-09-25 M. Clinton, R. K. Rowe
The antioxidant-stabilizer depletion of four 1.5-mm HDPE geomembranes from the same manufacturer each with a different resin and additive package is examined in air and a synthetic municipal solid waste leachate at a range of temperatures (40–95°C) for 7.5 years. Two were formulated for high temperatures and used polyethylene of raised temperature resistance (PE-RT) resins while two used more conventional
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Permeability mechanism of PVC-P geomembranes based on low-field NMR technology Geosynth. Int. (IF 4.5) Pub Date : 2023-09-25 X. L. Zhang, Y. Y. Wu, C. J. Yin, X. Y. Gu
The permeability of plasticised polyvinyl chloride (PVC-P) geomembranes (GMBs) is of significant importance to the safe operation of impermeable structures and even entire projects. To avoid the drawbacks of the traditional method of adopting the permeability coefficient to characterise permeability, this paper presents a mathematical model of porosity and seepage discharge based on the results of
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Lateral force–displacement relationships for shallowly buried pipe reinforced by geocells Geosynth. Int. (IF 4.5) Pub Date : 2023-09-20 Y. Sawada, M. Kitada, H. I. Ling, T. Kawabata
Geocell reinforcements are proposed as a thrust countermeasure for shallowly buried pipeline bends and tees. The proposed method is easy to construct and has shorter construction time than the use of conventional concrete blocks since it does not require curing. Lateral loading tests were conducted on plates reproducing pipe bends or tees to verify their effectiveness while understanding deformation
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Centrifuge modelling of the progressive failure of geosynthetic-reinforced embankments Geosynth. Int. (IF 4.5) Pub Date : 2023-09-20 G. Zheng, B. Xia, H. Zhou, X. Yu, Y. Diao, Y. Du
Understanding the failure mechanism of geosynthetic-reinforced embankments on soft foundations is crucial for ensuring safety in design. This study aimed to investigate the failure mechanism and stability of embankments reinforced with varying layers and lengths of geosynthetic reinforcements utilising centrifuge testing and numerical modelling. The results show that a foundation under construction
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Investigating the effect of temperature and water freezing on the response of geogrid composite Geosynth. Int. (IF 4.5) Pub Date : 2023-09-20 J. Jarjour, M. A. Meguid
Geosynthetics can be exposed to varying temperature and moisture conditions when embedded in soil, which can affect their mechanical properties. However, existing testing standards do not account for extreme environmental conditions such as low temperatures and ice formation. The aim of this study was to understand the effect of temperature variation and ice formation on the tensile properties of dry
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Thermo-hydraulic numerical modelling of in-soil conditions in reinforced soil walls Geosynth. Int. (IF 4.5) Pub Date : 2023-08-21 A. Moncada, I. P. Damians, S. Olivella, R. J. Bathurst
The role of temperature and relative humidity in long-term mechanical and chemical degradation of polyester fibres due to hydrolysis and creep is well documented. This study presents the results of a thermo-hydraulic 2D finite-element model used to estimate the magnitude and distribution of in situ temperature, relative humidity, and degree of saturation in the backfill of reinforced soil walls (RSWs)
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GMX/GDC strength loss mechanisms Geosynth. Int. (IF 4.5) Pub Date : 2023-08-09 J. Lin, T. D. Stark, A. Idries, S. Choi
This paper provides insight into the causes of post-peak strength loss for textured geomembrane (GMX) and nonwoven geotextile (NGT) interfaces. The NGT can be part of a geosynthetic drainage composite (GDC) or a stand-alone NGT. The study used ring shear tests where one of the two interface materials was replaced after reaching a residual strength condition and the test was restarted to measure the
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Breakthrough time assessment of liner system for MSW landfills with high leachate heads Geosynth. Int. (IF 4.5) Pub Date : 2023-08-07 H. Xie, J. Wu, L. Zhan, A. Bouazza, Y. Shi, Y. Chen, J. Lan
This paper presents a design method for liner systems of municipal solid waste (MSW) landfills with high leachate heads based on the breakthrough time of an indicative contaminant (Chloride). The performance of liner systems with varying thicknesses of compacted clay liner and attenuation layer was assessed. The single composite liner consisting of a geomembrane and a 0.75-thickness compacted clay
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Leakage through a circular geomembrane hole overlain and underlain by silty sand tailings Geosynth. Int. (IF 4.5) Pub Date : 2023-07-27 J. Fan, R. K. Rowe
Experiments are conducted to investigate leakage through circular GMB holes overlain and underlain by both tailings with various hole diameters and GMB thicknesses. Finite element analyses are performed to explore the effect of hydraulic conductivities (k) of subgrade (underliner) and tailings above the GMB (overliner) on water head contours dissipation. An analytical solution is developed for predicting
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Thermo-hydraulic numerical modelling of in-soil conditions in reinforced soil walls Geosynth. Int. (IF 4.5) Pub Date : 2023-07-21 A. Moncada, I. P. Damians, S. Olivella, R. J. Bathurst
The role of temperature and relative humidity on long-term mechanical and chemical degradation of polyester fibres due to hydrolysis and creep is well documented. This study presents the results of a thermo-hydraulic 2D finite-element model used to estimate the magnitude and distribution of in-situ temperature, relative humidity, and degree of saturation in the backfill of reinforced soil walls (RSWs)
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Bearing capacity of footings on geosynthetic-reinforced soils under combined loading Geosynth. Int. (IF 4.5) Pub Date : 2023-07-13 B. Yaghoobi, H. Fathipour, M. Payan, R. Jamshidi Chenari
In this study, the ultimate bearing capacity of shallow strip footings resting on a geosynthetic-reinforced soil mass subjected to inclined and eccentric combined loading is rigorously examined through the well-established method of lower bound limit analysis (LA) in conjunction with finite element (FE) and second-order cone programming (SOCP). Lower bound limit analysis formulation is modified to
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Dynamic stress attenuation characteristics of geocell-reinforced railway subgrade Geosynth. Int. (IF 4.5) Pub Date : 2023-06-23 J. Xiao, K. Wang, L. Xue, Z. Liu, Y. Bai, S. Sun, F. Yang
The dynamic stresses in many subgrades for old railways exceed the bearing capacity of the fillers. The geocell has been used to reinforce weak subgrades and achieve a quick attenuation in the dynamic stress. In this study, a series of field tests were conducted to investigate the dynamic stress attenuation characteristics in a weak subgrade reinforced with a geocell. A coupled finite element-discrete
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Bearing capacity of combined loading footings on geosynthetic-reinforced granular soil Geosynth. Int. (IF 4.5) Pub Date : 2023-06-19 B. Yaghoobi, H. Fathipour, M. Payan, R. J. Chenari
In this study, the ultimate bearing capacity of shallow strip footings resting on a geosynthetic-reinforced soil mass subjected to inclined and eccentric combined loading is rigorously examined through the well-established method of lower bound limit analysis (LA) in conjunction with finite element (FE) and second-order cone programming (SOCP). Lower bound limit analysis formulation is modified to
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Cyclic response of stereoscopic geogrid–sand interface under static and cyclic loading Geosynth. Int. (IF 4.5) Pub Date : 2023-06-13 W. X. Zeng, F. Y. Liu, M. J. Ying
The investigation of cyclic shear response on a geosynthetic–soil interface is important for reinforced soil structures. A stereoscopic geogrid with a thickened transverse-rib thickness increases the interaction with the soil compared with a planar geogrid. In this study, three-dimensional printing technology was used to produce stereoscopic geogrids with transverse-rib thicknesses of 5, 10, 15 and
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New insights into geotribology of non-dilative interfaces from novel experimental studies Geosynth. Int. (IF 4.5) Pub Date : 2023-06-06 L. Kandpal, P. Vangla
The paper presents new insights into the particle kinematics and tribological aspects and their effects on the non-dilative interface shear response from novel experimental investigations. A custom-designed apparatus that enables image analysis of particulate-continuum materials interactions from the bottom of the interface plane while shearing was developed. The effect of influential factors on the
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Geometric and strain behaviour of full-scale geotextile tubes for dewatering sludge Geosynth. Int. (IF 4.5) Pub Date : 2023-05-31 S. T. S. Paranhos, M. A. Aparicio-Ardila, J. Lins da Silva
Geotextile tubes have been presented as a viable alternative for dewatering sludge generated in different industries, characterised by having fine grain and high moisture content. The material commonly used to develop this system is woven geotextile due to its high strength properties. However, nonwoven geotextile tubes are a possible underexplored alternative that have good cost benefits. This paper
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Transport of heavy metal contaminants in a composite liner under non-isothermal condition Geosynth. Int. (IF 4.5) Pub Date : 2023-05-17 W. Jiang, S. Ge, C. Feng, J. Li
A mathematical model for the transport of heavy metal contaminants (HMCs) in a triple-layer composite liner with defective geomembrane under the non-isothermal condition is developed in this study, where the GMB/GCL/CCL (geomembrane, geosynthetic clay liner and compacted clay liner) composite liner is adopted as an example and the Langmuir adsorption model is incorporated. The proposed model is solved
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Chemical durability of bituminous geomembranes (BGMs) in heap leach pad applications Geosynth. Int. (IF 4.5) Pub Date : 2023-05-15 F. B. Abdelaal, A. Samea
The degradation behaviour of a 4.8 mm thick elastomeric bituminous geomembrane (BGM) immersed in pH 0.5, 9.5, and 11.5 synthetic mining solutions is examined over 26 months at 22, 40, 55 and 70°C. The low pH solution simulates the leach solutions found in copper, nickel, and uranium heap leach pads while the two high pH solutions simulate the chemistry and pH found in gold and silver heap leaching
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Strain assessment of polyethylene pipes in dense sand subjected to axial displacement Geosynth. Int. (IF 4.5) Pub Date : 2023-05-11 A. Reza, A. S. Dhar, M. Rahman
Buried polyethylene pipes used in gas distribution systems can experience excessive wall strain when exposed to ground movement that can affect the performance of the pipes in service. This paper presents full-scale laboratory tests performed to investigate the responses of medium-density polyethylene (MDPE) gas-distribution pipes in dense sand when subjected to axial ground movement. Pipes buried
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Reliability analysis of compacted embankment with geocomposite under infiltration Geosynth. Int. (IF 4.5) Pub Date : 2023-04-24 R. Showkat, G. L. Sivakumar Babu
Embankment failures can be prevented by introducing geocomposites to act as drains. The effect of the geocomposite layer on the pore pressure distribution and surface displacements of an unsaturated embankment upon infiltration has been studied numerically using deterministic and probabilistic approaches. The inclusion of the geocomposite layer leads to an increase of suction below the interface and
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Investigation on the long-term strain of geogrid in GRPS embankment under cyclic loading Geosynth. Int. (IF 4.5) Pub Date : 2023-04-24 K.-F. Liu, K.-R. Xue, M.-J. Wen, L. Wang
Geogrid is a horizontal reinforcement material that is used in geosynthetic-reinforced pile-supported (GRPS) embankments in freeways with soft soil. Nevertheless, the long-term deformation mechanics of geogrid in the GRPS embankment under cyclic loading is not clear enough. This paper presents a laboratory model study of a GRPS embankment to study the long-term geogrid strain under cyclic loading.
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Woven geotextile permeability under uniaxial and laterally constrained conditions Geosynth. Int. (IF 4.5) Pub Date : 2023-04-20 K. Y. Li, X. W. Tang, M. L. Fei, W. L. Chen, J. X. Liang, Q. Q. Xiang
Woven slit-film geotextiles are often subjected to in-plane tensile loads in engineering applications, which may alter relevant permeability properties. The fractal model of the permeability coefficient in woven geotextiles is extended to predict the permeability coefficient of geotextiles subjected to uniaxial and laterally constrained uniaxial tensile strains. Based on the observation and summary
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Chemical durability of bituminous geomembranes (BGMs) in heap leach pad applications Geosynth. Int. (IF 4.5) Pub Date : 2023-04-11 F. B. Abdelaal, A. Samea
The degradation behaviour of a 4.8 mm thick elastomeric bituminous geomembrane (BGM) immersed in pH 0.5, 9.5, and 11.5 synthetic mining solutions is examined over 26 months at 22, 40, 55 and 70°C. The low pH solution simulates the leach solutions found in copper, nickel, and uranium heap leach pads while the two high pH solutions simulate the chemistry and pH found in gold and silver heap leaching
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Strain assessment of polyethylene pipes in dense sand subjected to axial displacements Geosynth. Int. (IF 4.5) Pub Date : 2023-04-11 A. Reza, A. S. Dhar, M. Rahman
Buried polyethylene pipes used in gas distribution systems can experience excessive wall strains when exposed to ground movements that can affect the performance of the pipes in service. This paper presents full-scale laboratory tests performed to investigate the responses of medium-density polyethylene (MDPE) gas-distribution pipes in dense sand when subjected to axial ground movements. Pipes buried
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Machine-learning modelling of tensile force in anchored geomembrane liners Geosynth. Int. (IF 4.5) Pub Date : 2023-04-05 K. V. N. S. Raviteja, K. V. B. S. Kavya, R. Senapati, K. R. Reddy
Geomembrane (GM) liners anchored in the trenches of municipal solid waste (MSW) landfills undergo pull-out failure when the applied tensile stresses exceed the ultimate strength of the liner. The present study estimates the tensile strength of GM liner against pull-out failure from anchorage with the help of machine-learning (ML) techniques. Five ML models, namely multilayer perceptron (MLP), extreme
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Gas flow characteristics of GCL under distortions, wet-dry cycles, and hydrating fluids Geosynth. Int. (IF 4.5) Pub Date : 2023-04-04 V. Khan, S. Rajesh
Geosynthetic clay liner (GCL) is commonly used in cover system of engineered landfill to limit migration of gases and infiltration of water. In engineered landfill, gas transfer occurs by advection and diffusion, which may take place at different time frames or simultaneously depending on placement conditions. Hence, efficacy of GCL as a gas barrier under advection and diffusion needs to be assessed
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Laboratory preparation and tensile signal response of sensor-enabled piezoelectric geobelt Geosynth. Int. (IF 4.5) Pub Date : 2023-04-04 Y. Rao, J. Ye, H. Wang, J. Wang, G. Ding, J. Ni
In this study, a sensor-enabled piezoelectric geobelt (SPGB) was developed and its mechanical properties and signal output mode were analysed. It is found that the output voltage signal of SPGB increases with the increase of strain rate. Furthermore, the normalised impedance of SPGB samples at different strain rates has a linear relationship with their strain rate. This study shows that the self-sensing