Journal•ISSN: 1072-6349
Geosynthetics International
Thomas Telford Ltd.
About: Geosynthetics International is an academic journal published by Thomas Telford Ltd.. The journal publishes majorly in the area(s): Geosynthetics & Geotextile. It has an ISSN identifier of 1072-6349. Over the lifetime, 987 publications have been published receiving 24565 citations.
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TL;DR: In this paper, numerical experiments were carried out to investigate the influence of reinforcement stiffness, reinforcement length, and base boundary condition on the seismic response of a 6m high geosynthetic-reinforced soil retaining wall.
Abstract: The paper reports results from numerical experiments that were carried out to investigate the influence of reinforcement stiffness, reinforcement length, and base boundaryconditionontheseismicresponseofanidealized6mhighgeosynthetic-reinforced soilretainingwallconstructedwithaverystiffcontinuousfacingpanel.Thenumericalmod- els were excited at the foundation elevation by a variable-amplitude harmonic motion with a frequency close to the fundamental frequency of the reference structure. The two-dimen- sional, explicit dynamic finite difference program Fast Lagrangian Analysis of Continua (FLAC) was used to carry out the numerical experiments. Numerical results illustrate that the seismic response of the wall is very different when constructed with a base that allows the wall and soil to slide freely and when the wall is constrained to rotate onlyabout thetoe. Parametric analyses were also carried out to investigate the quantitative influence of the damping ratio magnitude used in numerical simulations and the effects of distance and type offar-endtruncatedboundary.Theresponseofthesamewallexcitedbya scaledearthquake recordwasdemonstratedtopreservequalitativefeaturesofwalldisplacementandreinforce- mentloaddistributionasthatgeneratedusingthereferenceharmonicgroundmotionapplied at3Hz.Thelessonslearnedinthisstudyareofvaluetoresearchersusingdynamicnumerical modeling techniques to gain insight into the seismic response of reinforced wall structures.
218 citations
TL;DR: In this paper, the results of preliminary laboratory tests on a clay and a sand reinforced with randomly distributed fibrillated fibers are presented, showing that compaction, direct shear, unconfined compressi...
Abstract: The results of preliminary laboratory tests on a clay and a sand reinforced with randomly distributed fibrillated fibers are presented. The results of compaction, direct shear, unconfined compressi...
202 citations
TL;DR: In this paper, the authors investigated the qualitative and quantitative improvement of load capacity of individual encased stone columns through laboratory model tests and found that the load-carrying capacity of the encasement improves load transfer to deeper depths of soil.
Abstract: Stone columns (or granular piles) have proven to be ideal ground reinforcement for supporting flexible structures such as embankments and storage tanks. Stone columns installed in very soft soils will have very low lateral confinement: hence they undergo excessive bulging, leading to undue settlement and limited load-carrying capacity. In these situations, the strength and stiffness of the stone column can be enhanced by encasing the individual stone columns with a suitable geosynthetic. The encasement improves load transfer to deeper depths of soil. This paper investigates the qualitative and quantitative improvement of load capacity of individual encased stone columns through laboratory model tests. These tests were performed in a rigid unit cell that represents the stone column and the soil within the contributary area around the stone column. The load tests indicated a clear improvement in the load capacity of the stone column due to encasement. Encasement with geosynthetics having higher modulus resu...
178 citations
TL;DR: In this paper, a geosynthetic-reinforced soil retaining wall with full-height rigid facings was constructed in Japan as important permanent structures mainly for railways and occasionally for highways.
Abstract: During the past decade, more than 26 km of geosynthetic-reinforced soil retaining walls (GRS-RWs) with full-height rigid (FHR) facings were constructed in Japan as important permanent structures mainly for railways and occasionally for highways. These include retaining walls for embankments, bridge abutments, a wall backfilled with a nearly saturated clay constructed on a thick soft clay deposit, a wall that survived a very severe earthquake, and walls constructed to support bullet train tracks. The full-height rigid facings are cast in place using staged construction procedures. A new method of stiffening reinforced soil by vertical preloading and prestressing is also described.
153 citations
TL;DR: The K-stiffness method is an empirically developed working stress method used to compute reinforcement loads for the internal stability design of geosynthetic-reinforced soil walls under serviceabi... as mentioned in this paper.
Abstract: The K-stiffness Method is an empirically-developed working stress method used to compute reinforcement loads for the internal stability design of geosynthetic-reinforced soil walls under serviceabi...
143 citations