Experimental and numerical studies on the reinforcing mechanisms of geosynthetic-reinforced granular soil under a plane strain condition

Xu, Changjie; Liang, Cheng; Shen, Panpan; Chai, Fei

doi:10.1016/j.sandf.2020.03.003

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…Compared with previous studies (Liu et al 2017 ; Xu et al 2020 ; Huang et al 2020a ), the mesoscale parameters of weak rock-like materials can be adjusted to reproduce the mechanical behavior of similar materials. The procedures of calibration process include the genesis of rectangular models (100 mm × 50 mm), the simulated uniaxial compression tests, and comparison of mechanical parameters.…”

Section: Physical Experiments and Numerical Simulationmentioning

confidence: 99%

Evaluation of safety and deformation characteristics of the secondary stope sandwiched between backfills in underground iron mines

Jin

Liu

Gao

et al. 2022

Bull Eng Geol Environ

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In a large underground iron mine (over 2000, 000 t/a) in China, a large volume of mined void could not be filled in time, which posed a threat to the working face. Physical and numerical models were used to investigate the stability of the mined void sandwiched between the backfills. Digital image correlation (DIC) method was employed in the physical model to calculate the deformation field of the roof and backfills. Stress meters and multi-point borehole extensometers were installed in the mine to observe the change of vertical stress and horizontal displacement in real backfills. Principal component analysis (PCA) and cluster analysis were applied to classify the deformation state around mined void. The deformation field was exhibited by the contour and curves of displacement, which was consistent between the physical model and numerical simulation. The contour indicated that highly deformed zones were ellipse-shaped and wedge-shaped in the backfills and roof respectively. The deformation process was classified into three states (stable state, transition state, and unstable state) by using the density-based clustering. The data obtained from the in situ monitoring showed that the vertical stress increased by 60–80 kPa and the horizontal deformation was small in the backfills close to mined void. Classification of deformation states indicated that the mined void (temporary opening) remained stable during production plan.

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Section: Physical Experiments and Numerical Simulationmentioning

confidence: 99%

Evaluation of safety and deformation characteristics of the secondary stope sandwiched between backfills in underground iron mines

Jin

Liu

Gao

et al. 2022

Bull Eng Geol Environ

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“…Regarding to the soil arching effect, significant research has been conducted in the literature [20][21][22][23][24][25][26][27][28][29][30]. As for the membrane effect, some guidelines have Sustainability 2023, 15, 619 2 of 19 been proposed to directly determine the maximum tensile force and strain of the reinforcement, which may significantly influence the serviceability behavior of the reinforced piled embankment [12,14,15,[31][32][33][34][35][36][37][38][39][40]. The research provides significant guidance regarding the design and construction of reinforced piled embankments; however, the deformation of geosynthetic reinforcements is usually assumed as an arc or catenary, without considering the subsoil support.…”

Section: Introductionmentioning

confidence: 99%

Ground Reaction of Lightly Overconsolidated Subsoil in Reinforced Piled Embankment under Cyclic Loads

2022

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Subsoil support is generally ignored in the design of reinforced piled embankments, resulting in a very conservative design for settlement control. This design philosophy may lead to an unnecessary increase in construction costs, especially for embankments constructed over subsoil of medium and high compressibility (i.e., compression index of subsoil larger than 0.2). This paper presents the ground reaction of lightly overconsolidated subsoil in a reinforced piled embankment subjected to cyclic loads for the purpose of investigating the general behavior of lightly overconsolidated subsoil, and it promotes the sustainable development of piled embankment technology. The ground reaction of subsoil under both static and cyclic loads was comprehensively analyzed in terms of settlement and incremental vertical stress, which exhibited approximately the same profile. However, the settlement of lightly overconsolidated subsoil under a cyclic load was 23% larger than that under a static load. A parametric study was then performed under cyclic loads, and the results showed that the vertical stress carried by the subsoil was the most sensitive to the pile spacing amongst all the parameters considered in this paper. The analysis demonstrated an approximately 88% increase in stress when spacing was enlarged from 2.0 to 3.0 m. Finally, a modified analytical method for the ground reaction of lightly overconsolidated subsoil under cyclic loads was presented, and it showed reasonable agreement with the numerical simulation, particularly for relatively low geogrid stiffnesses, low embankment height (<6.5 m), and small pile spacing (e.g., 2–3 m center to center).

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“…Wang et al, 2020 studied the creep behavior of sand -geogrid under different loading levels and reported that creep mainly occurs near the pullout point and deformations is reduced from tensile end to the xed end of the geogrid. Effect of back ll compaction density on reinforced soil walls has been investigated using Centrifuge by Xu et al, 2020. Results showed that displacement of the model with inadequate compaction (D r = 65%) was 30% greater than the model with Dr = 95%.…”

Section: Introductionmentioning

confidence: 99%

Appraisal of Anchor Arrangement and Size On Sand-Geogrid Interaction In Direct Shear

Abdi

Chafjiri

2021

Preprint

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Soil – reinforcement interaction is a major factor in the analysis and design of reinforced earth structures. In current research the effects of attaching elements of different size and numbers as anchors on enhancement of interaction at soil - geogrid interface under direct shear conditions were studied. Poorly and well graded sands (SC & Sf), a high density polyethylene geogrid, anchors with three different size and numbers (layouts) and clamping length of 2cm from shear surface were used. Samples were prepared dry at a relative density of 80% in a 30×30cm direct shear box and subjected to normal pressures of 12.5, 25 and 50kPa with the shear load applied at a rate of 1mm/min. Results of the assessment show that anchored geogrids improve shear resistance at interface mainly due to mobilization of passive soil resistance that is significantly influenced by the magnitude of the normal pressure and the number and size of anchors. Interaction enhancements achieved varied between a minimum of 8% and a maximum of 42%.

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Experimental and numerical studies on the reinforcing mechanisms of geosynthetic-reinforced granular soil under a plane strain condition

Cited by 14 publications

References 21 publications

Evaluation of safety and deformation characteristics of the secondary stope sandwiched between backfills in underground iron mines

Evaluation of safety and deformation characteristics of the secondary stope sandwiched between backfills in underground iron mines

Ground Reaction of Lightly Overconsolidated Subsoil in Reinforced Piled Embankment under Cyclic Loads

Appraisal of Anchor Arrangement and Size On Sand-Geogrid Interaction In Direct Shear

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