Raws li qhov saum npoo ntawm cov hlau-yas geogrid txuas mus rau hauv cov qauv ntxhib niaj zaus, nws raug rau kev ntxhov siab loj heev thiab kev sib txhuam nrog kev sau, uas txwv cov shearing, lateral compression thiab uplift ntawm lub hauv paus av tag nrho. Vim lub siab nruj ntawm cov av txhawb nqa lub cushion, nws yog qhov tsim nyog rau kev sib kis thiab kev sib kis ntawm lub hauv paus sab saud, thiab muab faib rau hauv cov txheej hauv qab mos av uas muaj peev xwm zoo. Yog li, dab tsi yog siv cov yas yas geogrids ntawm asphalt overlays?
Vim nws txoj kev ua tau zoo heev, tom qab kev hloov kho saum npoo thiab txheej txheej, cov khoom ntawm cov hlau thiab yas tau hloov pauv, cov khoom sib xyaw ntawm cov hlau tau raug txhim kho, thiab hnav tsis kam thiab shear tsis kam ntawm matrix tau zoo heev. Cov hlau yas geogrid tsim los ntawm cov hlau yas geogrid cov chaw tsim khoom tuaj yeem ua lub luag haujlwm tseem ceeb thaum siv rau asphalt overlay.
Thaum qhov kub thiab txias, qhov saum npoo ntawm asphalt pavement yog mos thiab nplaum; nyob rau hauv qhov kev txiav txim ntawm lub tsheb thauj khoom, asphalt nto tsis tuaj yeem rov qab mus rau nws lub xeev dhau los. Tom qab lub load raug tshem tawm, yas deformation tshwm sim. Yas deformation yog tsim nyob rau hauv kev cuam tshuam ntawm tas mus li tsub zuj zuj thiab rov dov ntawm lub tsheb thaum lub sij hawm estrus. Hauv asphalt pavement, steel yas geogrid tuaj yeem cuam tshuam kev ntxhov siab thiab tensile kev nyuaj siab, thiab tsim ib qho chaw tsis nyob nruab nrab ntawm ob. Qhov kev ntxhov siab tsis hloov tam sim ntawd tab sis maj mam, uas txo qhov kev puas tsuaj ntawm asphalt pavement tshwm sim los ntawm kev hloov tam sim ntawd ntawm kev ntxhov siab. Nyob rau tib lub sijhawm, qhov qis elongation txo qhov deflection ntawm txoj kev nto thiab xyuas kom meej tias txoj kev nto yuav tsis dhau deformation ntau dhau.
Hlau yas geogrid yog cov khoom siv geosynthetic loj. Nws muaj cov khoom tshwj xeeb thiab kev ua tau zoo piv rau lwm cov geosynthetics. Geogrids feem ntau yog siv rau kev txhawb nqa ntawm cov txheej txheem hauv av los yog cov khoom sib xyaw. Cov hlau-yas geogrid yog ua los ntawm high-strength steel hlau los ntawm kev kho tshwj xeeb, thiab yog extruded rau hauv ib tug composite high-strength tensile siv nrog ntxhib embossing rau saum npoo nrog additives xws li polyethylene los yog polypropylene. Qhov no ib txoj siv yog woven los yog clamped ntawm ib tug tej yam deb longitudinally thiab transversely, thiab nws cov pob qij txha yog welded los ntawm tshwj xeeb reinforcement thiab bonding vuam tshuab. Nws yog lub zog geogrid.
Post lub sij hawm: Mar-29-2022 