geotextiles are one of the most widely used synthetic materials in filtration and drainage applications. since in real applications, geotextiles are subjected to various hydraulic gradients and confining stresses, hydraulic behavior of geotextiles under different circumstances is of great practical importance. in this study filtration and drainage properties of several nonwoven needle-punched g...

The design of geotextile containers for dewatering applications typically requires good retention of the confined fill material solids. This becomes difficult to achieve when the fill material is fine grained and the pore openings are large. Furthermore, the proper retention becomes critical if the confined material is contaminated. Fly ash is one of the fine-grained geomaterials that exhibit b...

Geo-synthetic materials are being used with acceptable performance in soil and water projects worldwide. Geotextiles are one of the categories of geo-synthetics being used in drainage systems. First generation of geotextiles used in the late 1950’s as an alternative for gravel envelopes. In this research two methods (multiple regression and fuzzy interference system) evaluate to predict synthet...

Geotextile is one of the reinforcement materials adopted in many engineering structures. Conventional geotextiles have a limited effect due to insufficient friction strength between and soils. This paper proposes novel type geotextile with stitched transverse ribs improve effect. A series large-scale direct shear tests been conducted, improvement characteristics conventional geotextiles, geogri...

Filtration performance of nonwoven geotextiles strongly depends on pore opening constriction size, i.e., the minimum opening size of flow channels across the geotextile. Currently available methods of pore opening characterizations do not provide accurate information about the constriction size. This paper presents the constriction size distributions of eleven nonwoven geotextiles commonly used...

In Brazil, hydroelectricity represents close to 70% of the energy consumed in country. However, hydroelectric plant operations may be affected by deposit sediments for erosive processes on reservoir margins. This study presents results implementing two semi-rigid erosion control techniques installed margins Brazilian Hydroelectric Power Plants (HPPs). These were gabion and mattress used as a mi...

Granular and geotextile filters are commonly provided in several hydrological infrastructures to limit soil erosion allow unimpeded water seepage. The success of a filter depends on forming bridging structure, which is governed by the grain size distribution constriction filter. Currently, retention requirement satisfied considering representative opening size, whereas hydraulic conductivity em...