Effect Of Geotextile Reinforcement Research Articles

Effect of geotextile reinforcement on cyclic undrained behavior of sand

Dynamic behavior of reinforced soil are evaluated relative to a number of factors including: strain level, density, number of cycles, material type, fine content, geosynthetic inclusion, saturation, and effective stress. This paper investigates the dynamic behavior of saturated reinforced sand under cyclic stress condition. The cyclic triaxial tests are conducted on remolded specimens under various cyclic stress ratios (CSR) which reinforced by different arrangement of non-woven geotextile. Aforementioned tests simulate field reinforced saturated deposits during earthquake or other cyclic loadings. This analysis revealed that the geotextile arrangement played dominant role on dynamic soil behavior and as geotextile close to top of specimen, the liquefaction resistance increased. Meanwhile, the results demonstrate that the effects of arrangement of reinforcement layers on deformation and shear modulus are considerable.

The effect of geotextile reinforcement and prefabricated vertical drains on the stability and settlement of embankments

The construction of four dikes on deep strata of very soft clay has required the application of several measures to improve the performance of the foundation, such as very wide berms, basal geotextile reinforcement and prefabricated vertical drains (PVDs). In order to control the rate of construction, the foundation and the dikes have been monitored with settlement plates, topographic stakes, inclinometers and piezometers. The use of back-analysis has allowed finding the adequate material model, the smearing of drains and the coefficient of secondary compression necessary to attain a good agreement between the measurements supplied by the instrumentation and the calculated values obtained with an elastic-viscoplastic (EVP) finite element (FE) program. Both the geotextile reinforcement and the PVDs produce an important increase in the safety factor (SF). The PVDs produce a significant acceleration in settlements, but the influence of the geotextile in the settlements is negligible. The combined use of the geosynthetic reinforcement and PVDs enhances embankment performance substantially more than the use of either method of soil improvement alone. The importance of flow in the results has been established.

Effect of Geotextile Reinforcement on Shear Strength of Sandy Soil: Laboratory Study

Abstract This paper presents results of a series of undrained monotonic compression tests on loose sand reinforced with geotextile mainly to study the effect of confining stress on the mechanical behaviour of geotextile reinforced sand. The triaxial tests were performed on reconstituted specimens of dry natural sand prepared at loose relative density (Dr = 30%) with and without geotextile layers and consolidated to three levels of confining pressures 50, 100 and 200 kPa, where different numbers and different arrangements of reinforcement layers were placed at different heights of the specimens (0, 1 and 2 layers). The behaviour of test specimens was presented and discussed. Test results showed that geotextile inclusion improves the mechanical behaviour of sand, a significant increase in the shear strength and cohesion value is obtained by adding up layers of reinforcement. Also, the results indicate that the strength ratio is more pronounced for samples which were subjected to low value of confining pressure. The obtained results reveal that high value of confining pressure can restrict the sand shear dilatancy and the more effect of reinforcement efficiently.

Effect of Geotextile Reinforcement on Flexible Pavement Roads

Effect of Geotextile Reinforcement on Flexible Pavement Roads

Effect of geotextile reinforcement on the mechanical behavior of sand

Laboratory triaxial compression tests were carried out in order to determine the stress–strain and dilation characteristics of geotextile-reinforced dry beach sand. The mechanical behavior of the composite material was investigated through varying the number of geotextile layers, type of geotextile, confining pressure, and geotextile arrangement. In order to study the effect of sample-size on the results, tests were performed on samples with two different diameters. The results demonstrated that geotextile inclusion increases the peak strength, axial strain at failure, and ductility. However, it reduces dilation. Such improvements in the behavior of reinforced sand are more pronounced for small-size samples. Failure envelopes for reinforced sand were observed as bilinear or curved. Bulging between layers was detected in reinforced samples which failed.

Full-scale loading test on the reinforced embankments with geotextiles

Full-scale loading tests on sand embankments which were reinforced with geotextiles were carried out in order to investigate the reinforcing effect of geotextiles.Test conditions were as follows. (1) Geotextiles (Hard type, Soft type). (2) Inclination of slope (1:1.5, 1:1). (3) Loading position (top of slope, 1m from the top) (3) During the loading tests, the surface deformation of the slope, the stress of the geotextiles and the vertical loading pressure were measured.The test results showed that the condition of the loading position was most significant.In the case of loading on the top of the slope, the effect of geotextile reinforcement was noticeable. On the other hand, backside loading test results didn't show a clear difference in the load-settlement curves between reinforced embankment and un-reinforced one.

Geotextile reinforcement of embankments on peat

The effect of geotextile reinforcement on the stability and deformations of embankments constructed on peat, underlain by a firm base, is examined. Both end of construction and long-term conditions are considered. The effect of geotextile reinforcement is compared with the effect of alternative construction methods involving berms or light weight fill. The combined use of geotextiles with light weight fill is then considered. It is concluded that the use of either geotextile reinforcement or light weight fill may significantly improve embankment performance; however, the use of reinforcement in conjunction with light weight fill may be the most effective means of improving performance in regions where light weight fill is readily available.