hom geosynthetic

Hom geosynthetic

 

Nyob rau hauv 1977, GiroudJR thiab PerfettiJ thawj zaug xa mus rau permeable geosynthetic cov ntaub ntawv raws li "geotextiles" thiab impermeable cov ntaub ntawv raws li "geomembranes". Nyob rau xyoo 1980, txhawm rau ua kom tau raws li qhov xav tau ntawm geotechnical engineering, daim ntawv thov ntawm cov khoom siv geosynthetic maj mam nce, thiab lwm yam ntawm cov khoom siv geosynthetic siv hluavtaws polymers li raw cov ntaub ntawv tau tshwm sim ib tom qab, uas tau dhau lub Scope ntawm "ntaub" thiab "membrane", thiab ob pawg yog nyuaj rau suav nrog. Lub Koom Haum Thoob Ntiaj Teb ntawm Geotextiles tau npaj ib qho kev faib tawm rau geotextiles, geomembranes, thiab cov khoom muaj feem xyuam, thiab cov txheej txheem kev faib tawm tau npaj los ntawm Giroud li al. nyob rau hauv 1983 yog ib tug neeg sawv cev ntawm nws. Cov qauv tam sim no hauv kev faib cov ntaub ntawv geosynthetic yog tso tseg lub tswv yim ntawm kev siv geotextiles ua cov kab kev faib tawm tseem ceeb thiab tsim cov kev faib tawm uas yooj yim rau kev siv engineering.

 

Geosynthetic cov ntaub ntawv feem ntau muab faib ua plaub pawg:

 

 

 

 

I Geotextiles yog cov ntaub ntawv permeable geosynthetic, yav tas los hu ua geotextiles, thiab cov ntaub ntawv raw siv feem ntau yog polypropylene, polyester, los yog lwm yam hluavtaws fibers.

Geotextiles muaj xws li woven geotextiles thiab non-woven geotextiles.

Weaving geotextiles: Organic woven geotextiles thiab knitted geotextiles.

Non-woven geotextiles muaj xws li koob punched non-woven geotextiles, kub bonded non-woven geotextiles, thiab chemically bonded non-woven geotextiles.

 

Feem ntau geotextiles muaj xws li:

• Polyester luv fiber koob punched nonwoven geotextile: Nws yog tsim los ntawm kev tso polyester luv fibers rau hauv ib lub mesh los ntawm cov khoom sib txawv thiab cov txheej txheem, thiab tom qab ntawd ua lawv los ntawm rab koob xuas nrig ntaus thiab lwm yam txheej txheem.
• Polypropylene luv fiber koob punched nonwoven geotextile: cov khoom siv geosynthetic ua los ntawm polypropylene fibers los ntawm combing, nteg nets, koob punching, thiab solidification.
• Polyester filament koob punched nonwoven geotextile: ua los ntawm txoj kev ntawm polyester filament tsim ib lub web thiab solidifying, nrog nws cov fibers teem nyob rau hauv ib tug peb-dimensional qauv.
• Polypropylene woven fabric: Siv polypropylene ca filaments raws li raw cov ntaub ntawv, nws yog tsim los ntawm tsawg kawg yog ob txheej ntawm parallel yarns (los yog ca filaments), thiab woven rau hauv ib daim ntaub zoo los ntawm interweaving warp thiab weft yarns siv sib txawv weaving khoom thiab txheej txheem.
• Polyester woven npuag: Ua los ntawm lub zog siab thiab qis elongation hluavtaws fiber ntau xws li polyester thiab polypropylene, nws muaj kev tuav dej zoo dua, pom, ua haujlwm ntev, tiv thaiv corrosion, thiab siab tensile zog los ntawm kev siv tshuab weaving. Nws yog qhov tsim nyog rau cov ntug dej hiav txwv, kev tiv thaiv txoj kab nqes, kev tiv thaiv puam, thiab kev kho cov av mos, thiab yog cov khoom siv tshiab hauv kev tsim kho tshiab niaj hnub.
• Polyester composite geotextile: tsim los ntawm high-strength polyester fiber thiab non-woven npuag woven los ntawm warp knitting, zoo kawg nkaus combines cov high-strength kev ua tau zoo ntawm geogrid thiab cov kua dej ua tau zoo ntawm non-woven geotextile, ua rau nws zoo heev geotextile.

 

IIGeomembranebelongs rau cov ntaub ntawv impermeable geosynthetic, uas siv raw cov ntaub ntawv xws li asphalt thiab hluavtaws polymers, raws li zoo raws li ib co fillers thiab additives. Cov fillers muaj xws li ntxhia hmoov thiab polymer hmoov, thiab lwm yam. Txhawm rau txhim kho nws cov kav ntev thiab txo nws cov nqi, cov khoom ntxiv muaj xws li plasticizers, anti-aging agents, antibacterial agents, ntau yam stabilizers, thiab lwm yam. Cov feem ntau siv geomembrane thicknesses muaj xws li 0 .2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.75mm, 0.8mm , 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, thiab 3.0mm Los ntawm 0.2mm mus rau 3.{{ 30}} hli. Dav: 1m -12m. Xim: dub, ntsuab, xiav, dawb. Khoom siv: HDPE, LDPE, LLDPE. Kev faib tawm ntawm geomembranes yog raws li nram no:

Classified los ntawm cov nyhuv nto:

• Smooth geomembrane: Ib qho geomembrane nrog lub tiaj tiaj thiab du ntawm ob sab.
• Textured geotextile zaj duab xis: ib zaj duab xis geotextile tsim los ntawm qee cov tswv yim nrog cov duab ntxhib ntawm ib lossis ob sab. Muaj ib sab textured geotextiles thiab ob-sided textured geotextiles.

 

Classified los ntawm cov khoom siv raw:

• High density polyethylene geomembrane: geomembrane ua los ntawm nruab nrab ntom polyethylene resin los yog high-density polyethylene resin, nrog ib tug ceev ntawm ntau dua los yog sib npaug rau 0.940g/cm3
• Tsawg ntom ntom polyethylene geomembrane: geomembrane ua los ntawm cov khoom siv raw xws li low-density polyethylene resin (PE-LD), linear low-density polyethylene resin (PE-LLD), ethylene copolymer, etc., nrog lub geomembrane ntom ntawm tsawg dua los yog sib npaug. rau 0.939g/cm3
• Linear low-density polyethylene geomembrane: ib lub geomembrane ua los ntawm linear ntom polyethylene resin (PE-LLD) ua raw khoom, nrog ib tug geomembrane ceev ntawm 0.939g/cm3.

 

III Composite geosynthetic cov ntaub ntawvxa mus rau cov ntaub ntawv geosynthetic muaj li ntawm ob lossis ntau cov ntaub ntawv, xws li geotextiles thiab geotextiles, nrog rau cov khoom sib xyaw geotextiles, cov khoom sib xyaw geotextiles, cov khoom siv dej tsis sib haum (cov kav dej, cov kav dej, cov khoom siv dej tsis zoo, thiab lwm yam).

 

IVCov ntaub ntawv tshwj xeeb geosynthetic xa mus rau cov ntaub ntawv geosynthetic tshiab tsim nyob rau hauv kaum xyoo dhau los, ntxiv rau geotextiles thiab geomembranes, uas tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm geotechnical engineering. Cov pob muaj xws li geogrid, geosynthetic siv, geosynthetic cell, geosynthetic mesh ncoo, geosynthetic mesh, geosynthetic hnab, geosynthetic ntaub bentonite ncoo, polystyrene board, composite drainage network, lim phaj, zaub network, nyom cog grid, thiab lwm yam.

Cov khoom siv polymer feem ntau siv hauv geosynthetics yog:

• Polyethylene (abbreviated li PE);
• Polypropylene (abbreviated li PP);
• Polyester (abbreviated li PET);
• Polyamide (abbreviated li PA);
• Polyvinyl cawv (PVA);
• Polyvinyl chloride (abbreviated li PVC);
• Polystyrene (abbreviated li PS), thiab lwm yam.

 

Fibers muab faib ua tej fibers thiab tshuaj fibers. Ntuj fibers muaj xws li paj rwb, ntaub plaub, txhob lo lo ntxhuav, linen, thiab lwm yam; Cov tshuaj fiber ntau yog tsim los ntawm ntau yam khoom siv raw uas tau dhau los ntawm kev kho tshuaj thiab kev siv tshuab, suav nrog cov khoom siv hluavtaws thiab hluavtaws fibers. Synthetic fibers yog tsim los ntawm polymers ua raw cov ntaub ntawv, uas yog yaj los yog yaj mus rau hauv ib tug viscous spinning tov. Tom qab ntawd lawv tau txau los ntawm spinneret nyob rau hauv ib lub siab thiab ua tiav rau hauv cov khoom kawg. Piv nrog cov khoom siv hluavtaws, hluavtaws fibers muaj zog dua thiab qis dua noo noo nqus.

 

Hauv kev lag luam, luv fibers ntawm hluavtaws fibers yog hu ua fibers, thaum lub luv fibers ntawm hluavtaws fibers yog hu ua nylon. Cov fibers ntev ntawm hluavtaws fibers thiab hluavtaws fibers yog collectively hu ua txhob lo lo ntxhuav. Cov khoom lag luam npe sib xws yog xa mus rau polyester fiber li polyester, polyvinyl cawv fiber ntau li vinylon, polyacrylonitrile fiber li acrylic, polyethylene fiber li chlorinated fiber, thiab polypropylene fiber li polypropylene. Qee lub sij hawm ntxiv cov roj ua cim tom qab cov khoom npe hais txog kev ntxiv cov resin rau fibers kom tsis txhob shrinkage, waterproofing, thiab lwm yam; Qee lub sij hawm, ib co yas resin yog ntxiv los ua kom elasticity.