Geogrids yog tam sim no tus qauv tsim nyob rau hauv niaj hnub infrastructure tej yaam num, tseem muaj coob tus neeg tsuas yog vaguely paub txog lawv qhov sib txawv. Hauv kev muaj tiag, geogrids sib txawv hauv cov qauv, kev tsim khoom, thiab lub hom phiaj engineering. Ntawm lawv, biaxial geogrid tau dhau los ua qhov tseem ceeb hauv kev pavement thiab kev siv zog ntxiv. Nws cov qauv huv, sib luag kab sib chaws yuav zoo li yooj yim, tab sis engineering qab nws yog dab tsi tab sis.
Tsab ntawv xov xwm no qhia txog yuav ua li cas geogrids raug cais thiab tom qab ntawd ua tib zoo saib seb biaxial geogrids raug tsim thiab vim li cas lawv ua raws li lawv ua.
Yuav ua li cas Geogrids raug cais
Geogrids feem ntau categorized raws peb qhov loj me: txheej txheem kev tsim khoom, kev coj ua ntawm kev thauj khoom, thiab cov khoom muaj pes tsawg leeg.
1.Los ntawm kev tsim khoom
● Extruded thiab stretched geogrids
Ua los ntawm cov ntawv polymer uas tau xuas nrig ntaus thiab tom qab ntawd ncab raws li kev tswj xyuas qhov kub thiab txias. Qhov no yog ib txoj hauv kev siv ntau tshaj plaws.
● Warp-knitted geogrids
Siab - cov xov paj muaj zog yog mechanically knitted rau hauv kab sib chaws thiab coated rau kev tiv thaiv. Cov khoom siv no feem ntau siv qhov kev ua tau zoo dua tensile thiab durability.
● Welded lossis composite geogrids
Tsim los ntawm kev sib txuas los yog vuam ribs ua ke, qee zaum sib xyaw cov khoom sib txawv kom ua tiav cov txheej txheem tshwj xeeb.
Txoj kev tsim khoom ncaj qha cuam tshuam rau cov qauv sab hauv, cov yam ntxwv nruj, thiab ntev - lub sijhawm ua haujlwm ntawm cov khoom.
2.Los ntawm Load Direction
● Uniaxial geogrids
Engineered rau siab tensile lub zog nyob rau hauv ib tug thawj coj kev taw qhia, feem ntau yog siv nyob rau hauv tuav cov phab ntsa thiab reinforced av lug.
● Biaxial geogrids
Muab cov khoom sib piv tensile nyob rau hauv ob txoj kev qhia perpendicular, zoo tagnrho rau cov ntawv thov uas cov khoom xa tawm ntau sib npaug.
● Ntau-axial geogrids
Tsim nrog daim duab peb sab lossis cov qauv radial txhawm rau txhim kho cov khoom xa tawm thiab kaw hauv cov txheej granular.
Txoj kev npaj thauj khoom hauv cov qauv feem ntau txiav txim siab seb qhov kev teeb tsa twg tsim nyog.
3.Los ntawm cov khoom siv
Cov ntaub ntawv uas muaj xws li:
● Polypropylene (PP)
● Polyethylene (PE)
● Polyester (PET)
● Fiberglass
● Hlau -polymer composites
Txhua yam khoom muaj kev sib txawv ntawm qhov tawv, durability, tshuaj tsis haum, thiab kev ua haujlwm nkag.
Yuav ua li cas Biaxial Geogrids raug tsim
Lub ntsiab lus ntawm biaxial geogrid yog molecular orientation nyob rau hauv ob txoj kev. Cov txheej txheem tsim khoom yog nruab nrab ntawm kev tswj kev ncab.
Cov txheej txheem ntau lawm muaj xws li:
1. Daim ntawv extrusion
Polymer resin yog extruded rau hauv ib daim ntawv tiaj tus ntawm cov tuab tuab.
2.Txoj kev xuas nrig ntaus
Ib tug niaj hnub array ntawm qhov yog xuas nrig ntaus rau hauv daim ntawv, tsim ib tug precursor daim phiaj qauv.
3.Longitudinal thiab transverse stretching
Raws li kev tswj xyuas qhov kub thiab txias, daim ntawv yog ncab thawj zaug hauv ib qho kev taw qhia thiab tom qab ntawd nyob rau hauv perpendicular kev taw qhia. Qhov no aligns lub polymer chains ntawm ob axes.
4.Qhov txias thiab ruaj khov
Cov qauv kev taw qhia yog kho los ntawm kev ua kom txias, khaws cov khoom tensile hauv ob qho tib si.
Tsis zoo li cov kab sib txuas los yog welded, extruded biaxial geogrids yog tsim ua ke. Cov tav thiab junctions yog ib feem ntawm ib qho kev sib txuas txuas ntxiv, uas txhim kho cov qauv kev ncaj ncees thiab txo qhov kev pheej hmoo ntawm kev sib cais ntawm cov leeg hauv qab load.
Cov yam ntxwv ua tau zoo ntawm Biaxial Geogrids
1.Sib npaug hauv -Plane Strength
Vim hais tias tensile zog yog faib nyob rau hauv ob txoj kev qhia perpendicular, biaxial geogrids muab cov khoom siv ntxiv rau hauv lub dav hlau. Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem pavement qhov twg log loads disperse radially los ntawm lub hauv paus txheej.
2.Txhim kho Aggregate Confinement
Thaum muab tso rau hauv ib txheej granular, daim phiaj apertures interlock nrog aggregate hais. Qhov no mechanical confinement txo lateral displacement thiab tsub kom tag nrho txheej nruj. Cov txiaj ntsig sib xyaw ua ke ntawm kev sib sau ua ke thiab kab sib chaws txhim kho kev faib khoom.
3.Deformation tswj
Raws li kev thauj mus los rov qab, biaxial geogrids pab txwv kev tsim cov rut thiab shear deformation hauv cov txheej txheem. Los ntawm kev txwv tsis pub txav mus los, lawv ua rau lub neej ua haujlwm ntev dua.
4.Practical Installation Advantages
Biaxial geogrids feem ntau yog muab rau hauv cov yob sib sib zog nqus, ua rau lawv yooj yim los tuav thiab nruab. Muab hais tias sib tshooj ntev thiab subgrade npaj tau raug tswj kom zoo, installation efficiency siab.
Tej kev siv
Biaxial geogrids feem ntau yog siv nyob rau hauv cov xwm txheej uas cov loads yog multidirectional thiab faib thoob plaws ib cheeb tsam, xws li:
● Txoj kev hauv paus reinforcement
● Chaw nres tsheb thiab chaw ua haujlwm
● Tshav dav hlau pavement bases
● Ua haujlwm platforms tshaj qhov tsis muaj zog subgrades
Nyob rau hauv sib piv, cov ntaub ntawv khaws cia siab los yog cov pob zeb khov kho feem ntau xav tau uniaxial geogrids nrog lub zog ntau dua nyob rau hauv ib qho kev taw qhia.
Cov ntsiab lus tseem ceeb hauv Kev Xaiv
Cov lus qhia kom raug yuav tsum tau saib xyuas dhau ntawm nominal tensile lub zog. Cov yam tseem ceeb muaj xws li:
● Aperture loj compatibility nrog aggregate gradation
● Kev sib tshuam shear zog
● Ntev - lub sij hawm creep resistance
● Environmental durability
Qhov ua tau zoo ntawm biaxial geogrid nyob ntawm nws qhov kev cuam tshuam nrog cov av ib puag ncig lossis sib sau ua ke. Nws tsis ua ib leeg; es, nws ua ib feem ntawm ib tug composite structural system.
