Showing papers in "Geotextiles and Geomembranes in 2009"

TL;DR: In this article, the main advantages and limitations of some traditional experimental and theoretical methods for the study of soil-geosynthetics interaction are presented and new applications of these methods are addressed.

TL;DR: In this article, the authors describe laboratory drained standard triaxial tests conducted on artificially cemented Osorio sand specimens reinforced with randomly oriented discrete extensible polypropylene fibers, showing that fiber reinforcement increases peak strength, increases ultimate strength, decreases stiffness and changes the cemented sand brittle behavior to a more ductile one.

TL;DR: In this article, the results of a series of small-scale model column tests that were undertaken to investigate the behaviour of geogrid encased columns were discussed. And the results indicated a steady reduction in vertical strain with increasing encased length for both isolated columns and group columns and a significant increase in column stiffness and further reduction in column strain was observed for fully-encased columns.

TL;DR: In this article, the effect of various reinforcement parameters like the type and tensile strength of geosynthetic material, amount of reinforcement, layout and configuration of geoSynthetic layers below the footing on the bearing capacity improvement of the footings is studied through systemati model studies.

TL;DR: In this article, the potential benefits of providing geocell reinforced sand mattress over clay subgrade with void have been investigated through a series of laboratory scale model tests, and the results indicate that substantial improvement in performance can be obtained with the provision of geocell mattress, of adequate size, over the clay sub grade with void.

TL;DR: In this article, the results of a laboratory study performed on expansive soil reinforced with geofibers were reported and it was shown that discrete and randomly distributed geofibrers are useful in restraining the swelling tendency of expansive soils.

TL;DR: In this article, a three-dimensional coupled mechanical and hydraulic modeling was conducted using FLAC3D to consider consolidation and 3D arrangement of columns in column-supported bridge-approach embankments.

TL;DR: In this paper, the authors developed analytical solutions for estimating the ultimate bearing capacity of geogrid reinforced soil foundations (RSF) for both sand and silty clay soils, and compared the predicted bearing capacity values with the results of laboratory model tests.

TL;DR: In this article, the relative performance of different forms of geosynthetic reinforcement (i.e., geocell, planar layers and randomly distributed mesh elements) in foundation beds is compared; using same quantity of reinforcement in each test.

TL;DR: In this paper, a series of large scale direct shear tests were conducted to investigate the interface shear strength of different soils (sand, gravel, and laterite) against PET-yarn geogrids of various tensile strengths, percent open area, and aperture patterns.

TL;DR: In this article, the long-term performance and service life of HDPE geomembrane (GM) samples exposed to air, water and leachate are presented based on data from samples that have been ageing for 8-10 years.

TL;DR: In this paper, the authors proposed a new method for analysis of an embankment of granular fill on soft ground supported by a rectangular grid of piles and geosynthetic.

TL;DR: In this paper, the effect of a new type of geogrid inclusion on the bearing capacity of a rigid strip footing constructed on a sand slope was analyzed and the agreement between observed and computed results is found to be reasonably good in terms of load-settlement behavior and optimum parameters.

TL;DR: A series of unconfined compression tests were carried out to examine the effect of fiber reinforcement and distribution on the strength of fiber-reinforced cemented sand (FRCS) as discussed by the authors.

TL;DR: In this paper, an experimental program was conducted to determine the effects of geosynthetic reinforcement on mitigating reflection cracking in asphalt overlays, and the results indicated a significant reduction in the rate of crack propagation in reinforced samples compared to unreinforced samples and type of old pavement.

TL;DR: In this article, the effect of coir geotextiles on the performance of reinforced and unreinforced laboratory pavement sections was investigated using two base course thicknesses and two types of woven coir geo-textex.

TL;DR: In this paper, a parametric study was conducted to examine the influence of different parameters in some reduced scale models made of Expanded polystyrene (EPS) isolation barriers within Fontainebleau sand in order to determine geofoam isolation efficiency.

TL;DR: In this article, a series of 1-g shaking table tests were conducted on 1 m high reinforced-soil wall models and the effects of parameters such as soil density, reinforcement length, spacing and stiffness on the seismic response of the model walls were studied.

TL;DR: In this article, a series of triaxial compression tests were carried out in laboratory to investigate the response of sand columns encapsulated by geotextiles, and the experimental results were compared with data obtained from analytical method reported in the literature.

TL;DR: In this article, a new analytical model capable of reproducing both load transfer and displacement mechanisms on the geogrid length, under pullout conditions, is presented. But the model is not suitable for the case of geogrids.

TL;DR: In this paper, the results of a project aimed at identifying performance-based indicators that can be used by landfill operators to check the suitability of GCLs for bottom barrier applications are presented.

TL;DR: In this paper, a cast-in-situ concrete-rigid facing geogrid reinforced soil retaining wall in the Gan (Zhou)-Long (Yan) railway main line of China was monitored during construction.

TL;DR: In this paper, a pullout test was conducted with different height of cellular reinforcements along with planar sheet reinforcement, under two different normal pressures of 75kPa and 100kPa.

TL;DR: In this paper, the influence of geosynthetic reinforcement materials on the flexural behavior of bi-layer bituminous systems was evaluated by means of a four-point bending test under repeated loading cycles and the failure criterion was defined as the number of loading cycles corresponding to the flex point of the permanent deformation evolution.

TL;DR: In this paper, the results of the tests were analyzed for both, the static and the dynamic phases of the sliding and were interpreted based on the static initial friction angle, ϕ0, and the limit friction angle ϕlim.

TL;DR: In this paper, the response of geotextile-reinforced slopes subjected to differential settlements in a geotechnical centrifuge was addressed. But, the results of the centrifuge test indicate that even after inducing a differential settlement equivalent to 1.0 m in prototype dimensions, the structure with a flexible facing was not found to experience a collapse failure.

TL;DR: In this paper, the effect of sand layer thickness, normal pressure and transversal members of geogrids on the strength and deformation of saturated clays was investigated.

TL;DR: In this paper, the effectiveness of horizontally placed braided coir rope reinforcement on the strength improvement and settlement reduction of loose sand is investigated for modeling footings using plate load tests in the laboratory.

TL;DR: In this paper, the authors used jute-high density polyethylene (HDPE) blended geotextile samples for road construction in the construction of unpaved rural roads.

TL;DR: In this article, the performance of two types of Chinese MSW landfill bottom liner systems was evaluated based on: (1) the maximum leachate head; (2) leakage rate; (3) peak concentration of the target contaminant in an aquifer which was underlain the assumed landfill, and (4) total mass per unit area of discharge into the aquifer.