Geogrids yog cov khoom siv geosynthetic loj uas siv dav hauv kev tsim vaj tsev engineering, feem ntau ua haujlwm ntxiv rau hauv cov txheej txheem hauv av los yog cov khoom sib xyaw. Raws li cov txheej txheem tsim khoom thiab cov khoom siv, geogrids tuaj yeem muab faib ua plaub pawg loj: yas geogrids, steel-yas geogrids, fiberglass geogrids, thiab polyester warp-knitted geogrids. Thaum siv hauv engineering engineering, geogrids muaj cov khoom tshwj xeeb thiab kev ua haujlwm, txhim kho kev ruaj ntseg, deformation tsis kam, thiab kav ntev ntawm cov qauv engineering.
1. Txhais thiab Taw Qhia ntawm Geogrids
Geogrids yog cov khoom siv geosynthetic loj nrog cov khoom tshwj xeeb thiab kev ua haujlwm piv rau lwm cov ntaub ntawv geosynthetic. Lawv feem ntau yog siv los ua kev txhawb zog hauv cov txheej txheem hauv av los yog cov khoom sib xyaw.
Geogrids tau muab faib ua plaub pawg loj: yas geogrids, steel-yas geogrids, fiberglass geogrids, thiab polyester warp-knitted geogrids. Lub geogrid yog ob- qhov mesh mesh lossis peb - qhov loj mesh npo nrog qhov siab, ua los ntawm cov polymers xws li polypropylene thiab polyvinyl chloride los ntawm thermoplasticizing lossis molding. Thaum siv hauv engineering engineering, nws yog hu ua geogrid.
2. Lub luag haujlwm tseem ceeb thiab kev siv ntawm Geogrids
Lub luag haujlwm tseem ceeb thiab kev siv ntawm geogrids yog raws li hauv qab no:
● Ua kom cov kabmob muaj peev xwm thiab tiv thaiv- zawv zawg kev ua haujlwm ntawm lub hauv paus, txo cov av sib haum thiab deformation.
● Tiv thaiv subgrade deformation thiab tawg los ntawm kev poob ntawm cov ntaub ntawv subgrade.
● Txhim kho cov subgrade, zoo faib thiab diffusing loads, txhim khu kev ruaj ntseg thiab bearing peev xwm ntawm lub subgrade, thiab ncua nws cov kev pab cuam lub neej.
● Muaj peev xwm tiv taus ntau dua alternating loads.
● Kev sib xyaw geogrids nrog kev tua hluav taws thiab thauj tog rau nkoj pob zeb kev tsim kho txoj kev kho txoj kab nqes tuaj yeem tsis tsuas yog txuag 30% -50% ntawm kev nqis peev tab sis kuj txo lub sijhawm tsim kho ntau dua li ib nrab.
● Ntxiv geogrids rau subgrade thiab nto txheej txheej ntawm txoj kev loj tuaj yeem txo qhov deflection, txo rutting, ncua kev tawg qhov tshwm sim los ntawm 3-9 zaug, thiab txo cov txheej txheem txheej thickness mus txog 36%.
3. Kev faib tawm ntawm Geogrids
Geogrids feem ntau muab faib ua tsib pawg: uniaxial geogrids, biaxial yas geogrids, steel-yas geogrids, fiberglass geogrids, thiab warp-knitted polyester geogrids.
Ntawm lawv, uniaxial geogrids tuaj yeem muab faib ua ob hom raws li cov ntaub ntawv sib txawv: uniaxial polypropylene geogrids thiab uniaxial polyethylene geogrids; steel-plastic geogrids tuaj yeem muab faib ua convex-node steel-yas geogrids, interlocking steel-yas geogrids, thiab tsis xwm yeem-zoo li steel-yas geogrids raws li cov txheej txheem sib txawv; iav fiber ntau geogrids kuj suav nrog tus kheej - nplaum iav fiber ntau geogrids.
4. Kev ua tau zoo thiab cov yam ntxwv ntawm Geogrids
● Lub zog tensile siab thiab qis elongation: Cov iav fiber ntau geogrids siv iav fiber ntau raws li cov khoom siv raw thiab muaj kev tiv thaiv siab rau deformation, nrog kev tawg elongation tsawg dua 3%.
● Tsis ntev - lub sij hawm creep: Raws li cov khoom siv txhawb zog, lub peev xwm los tiv thaiv deformation nyob rau hauv ntev - lub sij hawm loads, piv txwv li, creep resistance, yog ib qho tseem ceeb heev. Cov iav fiber ntau tsis nkag mus, uas ua kom cov khoom muaj peev xwm tswj tau nws cov kev ua tau zoo nyob rau lub sijhawm ntev.
● Thermal stability: Lub melting kub ntawm iav fiber ntau tshaj 1000 degree, uas ua kom lub thermal stability ntawm iav fiber geogrids thaum lub sij hawm paving ua hauj lwm.
5. Daim ntawv thov Scope ntawm Geogrids
● Feem ntau yog siv rau hauv kev txuag dej xws li dikes, dams, dej ntws, kwj dej, seawall tsim, thiab reservoir reinforcement. Geogrids tuaj yeem siv rau hauv kev kho cov av pov tseg, cov chaw tsim hluav taws xob, cov phiaj xwm av tshauv, cov mines, metallurgy, landscaping, fencing, thiab lwm yam.
● Lawv kuj tau siv los txhawb cov av mos ntawm cov qauv tsim los txhim kho lub peev xwm ntawm lub hauv paus.
● Txhim kho lub hauv paus tshav dav hlau tuaj yeem txhim kho txoj kev khiav txoj kev muaj peev xwm, ua kom muaj kev nyab xeeb ntawm lub dav hlau ya tawm thiab tsaws.
● Siv geogrids ntawm txoj kev tsheb ciav hlau tuaj yeem tiv thaiv kev sib haum xeeb ntxov thiab kev puas tsuaj rau kev tsheb ciav hlau ntawm cov hauv paus av mos.
6. Kev tsim khoom thiab kev tsim khoom ntawm Geogrids
Kev tsim thiab tsim cov txheej txheem ntawm geogrids feem ntau suav nrog cov kauj ruam hauv qab no:
● Cov Khoom Raw: Cov khoom siv raw sib txawv raug xaiv raws li qhov xav tau, xws li siab -kev ua haujlwm fibers xws li iav fiber, carbon fiber, thiab aramid.
● Weaving: Cov yarns yog woven rau hauv ib tug mesh qauv siv lub warp knitting tshuab, thaum finer txuas yarns khi cov kev sib tshuam ntawm cov yarns ua ke los tsim muaj zog knots.
● Txheej: Tom qab weaving, txheej txheej txheej yuav tsum tau ua kom lub zog thiab ruaj khov ntawm geogrid. Feem ntau siv cov txheej txheem muaj xws li polyvinyl chloride coating agents thiab hloov asphalt coating agents.
● Kev Tshuaj Xyuas: Ua kev soj ntsuam zoo ntawm cov khoom tiav kom ntseeg tau tias nws ua tau raws li cov qauv tsim nyog.
● Cov khoom tiav: Tom qab kev tshuaj xyuas zoo, geogrid tuaj yeem muab tso rau hauv kev siv.
7. Geogrid Kev Tsim Kho Cov Txheej Txheem thiab Txheej Txheem
Txoj kev tsim kho thiab txheej txheem rau geogrids yog raws li nram no:
Kev npaj ua ntej kev tsim kho: Theem thiab compact lub hauv paus txheej, kom ntseeg tau tias ib tug flatness ntawm tsis ntau tshaj 15 hli thiab ib tug compaction℃uas ua tau raws li qhov yuav tsum tau tsim. Qhov saum npoo yuav tsum tsis muaj qhov tawv tawv xws li pob zeb thiab pob zeb.
Tso lub geogrid:
● Thaum khaws cia thiab tso cov geogrid, tsis txhob raug tshav ntuj ncaj qha thiab raug rau lub sijhawm ntev los tiv thaiv kev ua haujlwm tsis zoo.
● Muab nws tso rau ntawm txoj kab kev taw qhia, kom ntseeg tau tias kev sib tshooj ua tau raws li cov qauv tsim, thiab cov kev sib txuas yog ruaj khov. Lub zog ntawm cov pob qij txha nyob rau hauv cov kev taw qhia kev ntxhov siab yuav tsum tsis txhob qis dua cov khoom tsim tensile lub zog, thiab qhov sib tshooj ntev yuav tsum tsis pub tsawg tshaj 20 cm.
● Qhov zoo ntawm geogrid yuav tsum ua raws li cov lus qhia tshwj xeeb hauv cov duab kos duab.
● Kev tsim kho yuav tsum tsis tu ncua, tsis txhob sib tw, wrinkling, thiab sib tshooj. Xyuas kom lub geogrid yog taut kom hnyav; manually nruj nws kom ntseeg tau tias nws yog tus, tiaj tus, thiab nruj nreem adheres rau hauv qab nto. Ruaj ntseg nws siv txoj kev xws li nailing.
● Thaum txhim kho lub geogrid, cov kev taw qhia ntawm lub qhov elongated yuav tsum sib haum nrog tus ntoo khaub lig -sectional kev taw qhia ntawm txoj kev. Lub geogrid yuav tsum ncaj thiab flattened. Qhov kawg ntawm geogrid yuav tsum tau kho raws li tus qauv tsim.
● Backfilling yuav tsum tau ua kom sai li sai tau tom qab geogrid tau tso, nrog lub sijhawm tsis pub dhau 48 teev kom tsis txhob raug tshav ntuj ncaj qha.
Backfilling: Backfilling yuav tsum pib tam sim tom qab geogrid tso. Backfilling yuav tsum tau nqa tawm symmetrically raws li lub hauv paus ntsiab lus ntawm "ob sab ua ntej, ces qhov nruab nrab," thiab nws yog nruj me ntsis txwv tsis pub mus sau nyob rau hauv nruab nrab ntawm lub embankment ua ntej.
8. Geogrid U-zoo li tus Nails
Geogrid U- cov ntsia hlau zoo li yog ib qho tseem ceeb ntawm kev kho thiab txuas geogrids. Lawv yog cov cuab yeej cuab yeej cuab tam feem ntau siv los kho geogrids rau cov hauv paus xws li phab ntsa, pawg hauv paus, thiab cov phab ntsa hauv av kom ntseeg tau tias kev ruaj ntseg thiab kev pab lub neej ntev ntawm geogrid.
Geogrid U- cov ntsia hlau zoo li tus ntawv U, ua rau lawv yooj yim rau nruab thiab txav mus los. Lawv feem ntau yog ua los ntawm siab - lub zog steel lossis stainless hlau, muaj lub zog siab, tiv thaiv corrosion, thiab tiv thaiv xeb. Hauv cov phiaj xwm geogrid, U- cov ntsia hlau zoo li tsis yog kho cov geogrid nkaus xwb tab sis tseem tiv thaiv nws los ntawm kev puas tsuaj los ntawm lub sijhawm ntev - cua thiab nag. U- cov ntsia hlau tuaj yeem ntsia tau manually lossis mechanically thaum tsim kho. Lawv feem ntau yog ntsia rau ntawm phab ntsa lossis pawg hauv paus, thiab tom qab ntawd cov geogrid tau muab tso rau hauv U- tus ntsia thawv zoo li tus ntsia hlau thiab ruaj nrog cov xauv lossis bolts.
