نتایج جستجو برای: geotextile layers
تعداد نتایج: 103766 فیلتر نتایج به سال:
Geosynthetic materials have been demonstrated to be an accurate element in civil engineering, specifically the field of pavement. Regarding implementation these asphalt mixture layers, geosynthetics, such as geotextile and geogrid, used delay crack propagation and/or increase fatigue life. However, use material is based on experience learned or results obtained from testing a reduced scale labo...
Impact tests of stones on a geotextile or two loosely connected geotextiles (composites) have been performed and analysed to investigate the mechanisms that lead perforation. The were mounted concrete cylinder 0.8 m internal diameter, filled with uniformly graded dry sand. Drop blocks different shapes weighing approximately 40 kg. drop heights varied between 0.25 5.5 m. Results show shape stone...
Filtration performance of geotextiles strongly depends on their pore structure parameters, i.e. percent open area (POA), pore opening size distribution (PSD) and constriction size distribution (CSD). Current methods of determination of pore structure parameters contain inherent disadvantages whereas image analysis can be used effectively for this purpose. Two new image-based PSD and CSD determi...
Roof garden arrangements, which have emerged in recent years based on environmentally friendly approaches, not only increase urban aesthetics but are also a design approach that contributes to the solution of problems caused by climate change. In this study, filtration performance different geotextile materials was investigated extensive roof model. The studies related research were carried out...
هدف این تحقیق، مطالعه رفتار ژئوبگ در محیط سه بعدی بوده است. در این تحقیق رابطه ای جدید برای چسبندگی ظاهری ژئوبگ به دست آمده است. با استفاده از نرم افزار آباکوس نمونه هایی از ژئوبگ ساخته شد و با استفاده از نتایج عددی روابط پیشین و رابطه ی جدید به دست آمده برای چسبندگی ظاهری ژئوبگ مورد ارزیابی قرار گرفت و مشاهده شد روابط نظریه به دست آمده با فرض کشش غیریکنواخت برای چسبندگی ظاهری ژئوبگ، جواب های ن...
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...
Track thermal buckling is one of the primary safety issues continuously welded rail tracks. It has been shown that transition zones open deck steel bridges are more prone to track buckling, as loads from bridge and lower lateral resistance in this region can destabilize plane. The aim paper assess possibility reinforcing ballast layer with geotextiles mitigate problem zones. To do so, a number ...
A new method of evaluating strains and predicting required protection layers that are placed over geomembranes is developed based on the combined effects clay strength stiffness cushioning effect a nonwoven layer. Plots giving geotextile for different maximum presented expected landfill pressures under 300 kPa angular, 38 mm gravel above geomembrane liner both drained undrained loading conditio...
Characterization of a geosynthetic is necessary for its effective use in various field application of reinforced soil structure. In this paper, a new type of geosynthetic has been evaluated for its interaction properties for different backfill soils using direct shear device. The test results are compared based on the type of soils, inclusions, and interface mechanical properties. Three backfil...
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