Xov xwm

1, Dab tsi yog cov haujlwm ntawm ntau hom geogrids
Raws li cov khoom siv feem ntau siv hauv kev tsim kho, geogrids ua lub luag haujlwm tseem ceeb hauv kev tsim kho txoj kev.Tib lub sijhawm, geogrids kuj tau muab faib ua ntau hom.Niaj hnub no peb yuav qhia txog lub luag haujlwm ntawm ntau hom geogrids.
Muaj plaub hom geogrids.Cia peb qhia lawv:
1. Unidirectional yas geogrid muaj nuj nqi:
Uniaxial tensile geogrid yog cov khoom siv muaj zog geosynthetic.Nws yog dav siv nyob rau hauv embankment, qhov, wharf, txoj kev loj, railway, kev tsim kho thiab lwm yam teb.Nws cov kev siv tseem ceeb yog raws li nram no: ntxiv dag zog rau lub subgrade, zoo faib lub diffusion load, txhim khu kev ruaj ntseg thiab bearing peev xwm ntawm subgrade, thiab ncua lub neej kev pab cuam.Nws tuaj yeem tiv taus ntau dua alternating load.Tiv thaiv subgrade deformation thiab cracking tshwm sim los ntawm poob ntawm subgrade cov ntaub ntawv.Nws tuaj yeem txhim kho lub peev xwm ntawm tus kheej ntawm qhov txhaws qab ntawm phab ntsa tuav, txo lub ntiaj teb siab ntawm cov phab ntsa tuav, txuag nqi, ncua kev pab cuam lub neej, thiab txo cov nqi kho.Ua ke nrog kev txhaj tshuaj tiv thaiv thiab thauj tog rau nkoj kev tsim kho, txoj kab nqes kev saib xyuas tsis tuaj yeem txuag tau 30% - 50% ntawm kev nqis peev, tab sis kuj txo lub sijhawm tsim kho ntau dua ob zaug.Ntxiv geogrids rau subgrade thiab txheej txheej ntawm txoj kev loj tuaj yeem txo qhov deflection, txo cov rutting, ncua lub sijhawm tawg ntawm 3-9 zaug, thiab txo cov thickness ntawm cov txheej txheem los ntawm 36%.Nws muaj feem xyuam rau txhua yam av, tsis tas yuav tsum muaj cov khoom siv los ntawm lwm qhov chaw, thiab txuag kev ua haujlwm thiab sijhawm.Kev tsim kho yog yooj yim thiab ceev, uas tuaj yeem txo tus nqi tsim kho.Kev sib txuas ntxiv ntawm geogrid, kev ruaj ntseg zoo.

2. Lub luag haujlwm ntawm ob txoj kev yas geogrid:
Ua kom muaj peev xwm ntawm txoj kev (hauv av) lub hauv paus thiab ua kom lub neej ntev ntawm txoj kev (hauv av) lub hauv paus.Tiv thaiv kom tsis txhob tawg lossis tawg ntawm txoj kev (hauv av) saum npoo thiab ua kom cov av zoo nkauj thiab huv si.Kev tsim kho yooj yim, txuag lub sijhawm, txuag hluav taws xob, txo lub sijhawm tsim kho thiab txo cov nqi tu.Tiv thaiv lub culvert los ntawm kev tawg.Txhim kho av txoj kab nqes thiab tiv thaiv dej thiab av poob.Txo cov thickness ntawm lub cushion thiab txuag tus nqi.Txhawb kev ruaj khov ntsuab ib puag ncig ntawm nyom-cog lev ntawm txoj kab nqes.Nws tuaj yeem hloov cov hlau mesh thiab siv rau lub ru tsev cuav mesh hauv thee mine.
3. Lub luag haujlwm ntawm steel-yas geogrid:
Nws yog tsuas yog siv nyob rau hauv lub teb ntawm cov av mos foundation reinforcement, tuav phab ntsa thiab pavement crack resistance engineering ntawm txoj kev loj, railways, abutments, le caag, wharves, revetments, dams, slag yards, thiab lwm yam.
4. Kev ua haujlwm ntawm iav fiber ntau geogrid:
Lub qub asphalt qhob pavement yog ntxiv dag zog rau asphalt nto thiab tiv thaiv kab mob.Cov cement qhob pavement yog reconstructed mus rau hauv ib tug composite pavement los tiv thaiv kev puas tsuaj los ntawm phaj shrinkage.Txoj kev nthuav dav thiab kev tsim kho tshiab ua haujlwm, tiv thaiv cov kab nrib pleb los ntawm kev sib tshuam tshiab thiab qub thiab tsis sib haum xeeb.Qhov kev kho kom zoo ntawm cov av mos hauv paus yog qhov tsim nyog rau kev sib cais ntawm cov dej thiab sib sau ua ke ntawm cov av mos, ua kom muaj kev sib haum xeeb zoo, kev sib faib kev ntxhov siab, thiab txhim kho tag nrho lub zog ntawm subgrade.Lub hauv paus semi-rigidity ntawm txoj kev tshiab ua rau shrinkage tawg, thiab qhov cuab lub zog yog siv los tiv thaiv cov kab nrib pleb uas tshwm sim los ntawm kev xav ntawm lub hauv paus tawg.

2 、 Yuav ua li cas zoo yog qhov kev qaug zog tawg ua haujlwm ntawm geogrid
Geogrid siv lub zog polyester fiber ntau los yog polypropylene fiber ntau raws li cov khoom siv raw, txais cov qauv warp knitting directional qauv, thiab warp thiab weft yarns nyob rau hauv cov ntaub yog dawb los ntawm dabtsi yog khoov, thiab kev sib tshuam yog khi thiab ua ke nrog high-strength fiber filament los tsim ib tug khoom khi taw tes, muab kev ua si tag nrho rau nws cov khoom siv kho tshuab.Yog li koj puas paub tias nws txoj kev qaug zog tawg ua haujlwm zoo npaum li cas?
Cov txiaj ntsig tseem ceeb ntawm asphalt overlay ntawm lub qub cement pob zeb pavement yog txhawm rau txhim kho daim ntawv thov kev ua haujlwm ntawm txoj kev pavement, tab sis nws muaj kev cuam tshuam me ntsis rau cov kabmob.Lub pob zeb ua pob zeb hauv qab qhov sib tshooj tseem ua rau muaj txiaj ntsig tseem ceeb.Lub asphalt overlay ntawm lub qub asphalt qhob pavement yog txawv.Lub asphalt overlay yuav ris lub nra nrog lub qub asphalt qhob pavement.Yog li ntawd, asphalt overlay ntawm lub asphalt qhob pavement yuav tsis tsuas yog qhia txog cov kab nrib pleb, tab sis kuj qhia tias qaug zog tawg vim lub sij hawm ntev ntawm lub load.Cia peb txheeb xyuas qhov chaw thau khoom ntawm asphalt overlay ntawm qhov qub asphalt qhob pavement: vim tias asphalt overlay yog ib txheej txheej txheej uas hloov tau yooj yim nrog cov cuab yeej zoo ib yam li asphalt overlay, thaum raug cov nyhuv load, cov pavement yuav muaj deflection.Lub asphalt overlay uas ncaj qha kov lub log yog nyob rau hauv siab, thiab saum npoo yog raug rau tensile quab yuam nyob rau hauv cheeb tsam sab nraum lub log load margin.Vim tias lub zog quab yuam ntawm ob qhov kev ntxhov siab yog qhov sib txawv thiab nyob ze rau ib leeg, nws yooj yim rau kev puas tsuaj ntawm kev sib tshuam ntawm ob qhov kev ntxhov siab, uas yog qhov hloov ntawm lub zog tam sim ntawd.Nyob rau hauv cov nyhuv ntawm lub sij hawm ntev load, qaug zog tawg tshwm sim.
Geogrid tuaj yeem cuam tshuam cov kev ntxhov siab saum toj no thiab kev ntxhov siab tensile nyob rau hauv asphalt overlay los ua ib qho chaw tsis nyob nruab nrab ntawm ob qhov kev ntxhov siab, qhov twg cov kev ntxhov siab hloov maj mam es tsis txhob dheev, txo qhov kev puas tsuaj ntawm kev ntxhov siab tam sim ntawd hloov mus rau asphalt overlay.Qhov qis elongation ntawm cov iav fiber ntau geogrid txo qhov deflection ntawm pavement thiab xyuas kom meej tias cov pavement yuav tsis muaj kev hloov pauv deformation.
Unidirectional geogrid yog extruded rau hauv cov ntawv nyias nyias los ntawm polymer (polypropylene PP lossis polyethylene HDPE), tom qab ntawd xuas nrig ntaus rau hauv lub qhov txuas tsis tu ncua, thiab tom qab ntawd ncab longitudinally.Nyob rau hauv cov txheej txheem no, lub polymer yog nyob rau hauv ib tug linear lub xeev, tsim ib tug ntev elliptical network qauv nrog uniform tis thiab siab node zog.
Unidirectional daim phiaj yog ib yam khoom siv geosynthetic muaj zog, uas tuaj yeem muab faib ua unidirectional polypropylene daim phiaj thiab unidirectional polyethylene daim phiaj.
Uniaxial tensile geogrid yog ib hom kev muaj zog geotextile nrog siab molecular polymer ua cov khoom siv tseem ceeb, ntxiv nrog qee cov tshuaj tiv thaiv ultraviolet thiab tiv thaiv kev laus.Tom qab uniaxial nro, tus thawj faib saw molecules yog reoriented mus rau ib tug linear lub xeev, thiab ces extruded rau hauv ib tug nyias phaj, cuam tshuam cov pa mesh, thiab ces stretched longitudinally.Material Science.
Nyob rau hauv cov txheej txheem no, lub polymer yog coj los ntawm linear lub xeev, tsim ib tug ntev elliptical network qauv nrog uniform tis thiab siab node zog.Cov qauv no muaj lub zog tensile siab heev thiab tensile modulus.Lub zog tensile yog 100-200Mpa, uas yog nyob ze rau qib qis carbon steel, thiab zoo dua li cov khoom siv los yog cov khoom siv tam sim no.
Hauv particular, cov khoom no muaj ultra-siab thaum ntxov thoob ntiaj teb theem (elongation ntawm 2% - 5%) tensile zog thiab tensile modulus.Nws muab ib qho zoo tagnrho system rau av cog lus thiab diffusion.Cov khoom no muaj lub zog tensile siab (> 150Mpa) thiab haum rau txhua yam av.Nws yog ib qho khoom siv dav siv tam sim no.Nws cov yam ntxwv tseem ceeb yog lub zog tensile siab, zoo creep kev ua tau zoo, kev tsim kho yooj yim thiab tus nqi qis.