Sheekada December 2018
Waqtiyadii ugu dambeeyay, ururada tareenada ee adduunka oo dhan waxay bilaabeen adeegsiga geosynthetics sidii xal jaban si loo dejiyo ballast. Aragtidan, daraasado ballaaran ayaa lagu sameeyay adduunka oo dhan si loo qiimeeyo waxqabadka ballast-xoojinta geosynthetic ee xaaladaha kala duwan ee loading. Warqadani waxay qiimeyneysaa faa'iidooyinka kala duwan ee warshadaha tareenada ay heli karaan sababtoo ah xoojinta geosynthetic. Dib u eegista suugaanta waxay daaha ka qaadaysaa in geogrid uu xidho faafinta dambe ee ballastka, hoos u dhigayso xadka dejinta toosan oo ay yarayso jebinta walxaha. geogrid-ka ayaa sidoo kale la ogaaday in uu hoos u dhigo baaxadda cadaadiska mugga ee ballastka. Hagaajinta waxqabadka guud ee ay ugu wacan tahay geogrid ayaa loo arkay inay tahay hawl ka mid ah qodobka hufnaanta interneedka (φ). Intaa waxaa dheer, daraasaduhu waxay sidoo kale dejiyeen doorka dheeraadka ah ee geogrids si loo yareeyo degsiimooyinka kala duwanaanta iyo yaraynta cadaadiska heerka hoose. geosynthetics-ka ayaa la ogaaday inay faa'iido badan u leeyihiin haddii ay dhacdo raadad ku nastay dabaqyo jilicsan. Intaa waxaa dheer, faa'iidooyinka geosynthetics ee xasilinta ballastka ayaa la ogaaday inay aad u sarreeyaan marka la dhigo gudaha ballastka. Meesha ugu wanaagsan ee lagu meeleeyo geosynthetics waxaa soo sheegay dhowr cilmi-baarayaal inay qiyaastii 200-250 mm ka hooseeyaan soffit-ka hurdada ee qoto dheer ballast caadiga ah ee 300-350 mm. Tiro ka mid ah baaritaannada goobta iyo nidaamyada dhaqancelinta raadraaca ayaa sidoo kale xaqiijiyay doorka geosynthetics/geogrids ee xasilinta wadooyinka si ay gacan uga geystaan meesha laga saaro xaddidaadaha xawaaraha adag ee hore loo soo rogay, iyo kor u qaadista muddada u dhaxaysa hawlaha dayactirka.
Waqtiga boostada: Seb-28-2022