Showing papers in "Geotextiles and Geomembranes in 2018"

TL;DR: In this paper, the effect of the combined addition of fibers and a nontraditional polymer on the mechanical behavior of a clay was investigated, and the results confirmed significant UCS improvements with combined fiber reinforcement and PVA-BTCA stabilization when samples were cured for 14 days.

TL;DR: In this paper, two types of tape-shaped fibers, i.e., fiber A (width fw = 2.5mm) and fiber B (fw = 7mm), were used as reinforcements to mitigate the swelling behavior of an expansive soil.

TL;DR: In this article, the failure of 171-mechanically stabilized earth (MSE) walls reinforced with geotextiles or geogrids has been investigated and 320 failures have been reported.

TL;DR: In this article, a series of vertical mode block resonance tests are conducted over a rigid concrete footing resting on different reinforced soil conditions, including single layer geogrid reinforced, two layer geo-cell reinforced and geocell reinforced conditions.

TL;DR: A theoretical model for predicting the splitting tensile strength (qt) -unconfined compressive strength (qu) ratio of artificially cemented fibre reinforced soils is proposed in this paper. But the model is not applicable to the case of clean sands.

TL;DR: In this article, a 3D discrete element model that is capable of capturing the response of unconfined and soil-confined geogrid material is developed and used to study the reaction of crushed limestone reinforced with geogrides and subjected to surface loading.

TL;DR: In this article, the authors study the settlement and dynamic response characteristics of shallow square footings on geogrid-reinforced sand under cyclic loading, 7 sets of large scale laboratory tests are performed on a 0.5-m wide square footing resting on unreinforced and geoglrid reinforced sand contained in a 3.6-m × 1.6m steel tank, and the results showed that the ultimate bearing capacity of the footings was affected by the number and layout of the reinforcements.

TL;DR: In this article, the authors evaluate and compare the behavior of geosynthetic encased stone columns (GECs) and ordinary (conventional) OSCs during and after seismic excitations.

TL;DR: In this article, a set of well-instrumented, large-scale cyclic plate loading tests and numerical simulations were performed on geocell-confined ballast overlaying a weak subgrade material.

TL;DR: Water retention and hydration tests are reported for three needle punched geosynthetic clay liners (GCLs) in this paper, where GCLs hydration and their maximum hydration capacity were assessed against subgrade soils prepared at different initial gravimetric water contents.

TL;DR: A series of large-scale direct shear tests were conducted to investigate the behavior of unreinforced and geogrid-reinforced ballast at different rates of shearing as discussed by the authors.

TL;DR: In this article, the influence of seven different fiber types on the flexural performance of compacted cement-fiber-sand (CCFS) with four fiber fractions (0.5, 1, 1.5 and 2% by volume).

TL;DR: In this paper, the authors evaluated the capability of geotextile as a separation and filtration layer in reducing subgrade fines migration in a one-third scale Model Mobile Load Simulator, an accelerated pavement testing device.

TL;DR: In this paper, the field measurements and analysis of a preloading project with the installation of prefabricated vertical drains (PVDs) in Wenzhou, China are presented.

TL;DR: Wang et al. as mentioned in this paper combined the short and long PVDs (VPSL) to improve the top dredged marine clay together with the bottom sediment clay, and the results showed that the VPSL method was more effective for achieving a uniform soil strength profile.

TL;DR: In this article, the bearing capacity of horizontal reinforced stone columns (HRSCs) was investigated and numerical analyses were carried out to study main affecting parameters on the bearing performance of HRSCs, and it was shown that bearing capacity increases considerably with increasing the number of horizontal layers and decreasing space between layers.

TL;DR: In this article, the authors examined both the elastic and permanent components of displacements induced in geogrids by using mechanical extensometers attached to the geogrid structures, and showed that the presence of geoglids in asphalt overlays results in a lateral restraining mechanism that influences on the mechanical behavior of flexible pavements.

TL;DR: In this paper, a series of large-scale triaxial tests on ordinary stone columns and uniaxial testing on geotextile encased stone columns have been performed.

TL;DR: In this article, the effect of water salinity on the water retention curve of geosynthetic clay liners (GCLs) under constant volume condition was examined, and the results indicated that at a constant gravimetric moisture content the total suction increases as the salinity of the wetting liquid increases.

TL;DR: In this article, a series of direct shear tests was carried out to investigate influence of soil physical properties on interfacial properties of Geocell-reinforced granular soils.

TL;DR: In this paper, the authors investigated both unsaturated and saturated shear strength of the interfaces between a composite geotextile and three major types of materials: silty sand (SM), low-plasticity silt (ML), and highplasticy clay (CH) in a direct shear box, and found that unsaturated soil-interface shearing appeared to be more contractant than saturated interface shearing.

TL;DR: In this article, an analytical method is developed for the mechanically stabilized earth (MSE) walls taking into account the facing panel rigidity both after backfill construction and after strip footing load.

TL;DR: In this paper, the effect of the apparent cohesion of geocell-reinforced soil, the friction between the wall base and the footing, the weak interlayer in the wall, and the layout of the two-tiered geocell reinforced retaining wall on the failure surface and the factor of safety were investigated using the calibrated finite element procedure.

TL;DR: In this article, the influence of geocell reinforcement on performance of vertical plate anchors is studied and a series of model tests were carried out in a test bed-cum-loading frame assembly.

TL;DR: In this paper, the load-carrying characteristics of a series of large-scale steel square footing tests performed on sand reinforced with two types of reinforcement methods are described, i.e., full geocell reinforcement (FGR) and geocell with an opening reinforcement (GOR).

TL;DR: In this paper, the authors verify numerical modelling of compaction-induced stress (CIS) for the analysis of geosynthetic-reinforced soil (GRS) walls under working stress conditions.

TL;DR: In this article, the authors present the results of a laboratory and numerical study on the effects of cement treatment of the interface between geotextile and sand on the bearing capacity of a foundation built on geote-textex-reinforced sand.

TL;DR: In this paper, the authors describe the reinforcing effects of a geocell-reinforced soil layer on uplift behavior of anchor plates, and the results show that the peak and residual uplift capacities of anchor models were highest when the geocell layer over the anchor was used, but with increasing anchor size and embedment depth, the benefit of geocell reinforcement deceases.

TL;DR: In this paper, a series of drawdown centrifuge model tests were performed to investigate the deformation and failure behaviors of slopes reinforced with different geotextile layouts, and the results indicated that the geotexxtile reinforcement mechanism is essential to effectively evaluate the safety of slopes under drawdown conditions.

TL;DR: In this article, needle-punched nonwoven geotextiles were prepared from nettle and poly(lactic acid) fibers in different weight proportions for potential slope stabilization application using bioengineering approach.