Nkhani

1. Kodi ntchito zamitundu yosiyanasiyana ya geogrids ndi ziti
Monga zinthu zomwe zimagwiritsidwa ntchito popanga misewu, ma geogrids amagwira ntchito yofunika kwambiri pakumanga misewu.Nthawi yomweyo, ma geogrids amagawidwa m'mitundu yosiyanasiyana.Lero tikuwonetsa ntchito zamitundu yosiyanasiyana ya geogrids.
Pali mitundu inayi ya ma geogrid.Tiyeni tiwadziwitse:
1. Unidirectional pulasitiki geogrid ntchito:
Uniaxial tensile geogrid ndi chinthu champhamvu kwambiri cha geosynthetic.Amagwiritsidwa ntchito kwambiri m'mphepete mwa nyanja, ngalande, ma wharf, misewu yayikulu, njanji, zomangamanga ndi zina.Ntchito zake zazikulu ndi izi: limbitsani gawoli, kugawa bwino katundu wofalikira, kupititsa patsogolo kukhazikika ndi kunyamula mphamvu ya subgrade, ndikuwonjezera moyo wautumiki.Ikhoza kupirira katundu wambiri wosinthasintha.Pewani kuwonongeka kwa subgrade ndi kusweka komwe kumachitika chifukwa cha kutayika kwa zinthu zocheperako.Ikhoza kupititsa patsogolo mphamvu yodzinyamula yokha yodzaza kuseri kwa khoma losungirako, kuchepetsa kupanikizika kwa dziko la khoma losungirako, kupulumutsa ndalama, kuwonjezera moyo wautumiki, ndi kuchepetsa ndalama zosamalira.Kuphatikizidwa ndi njira yomangira konkire ya shotcrete ndi nangula, kukonza malo otsetsereka sikungangopulumutsa 30% - 50% ya ndalamazo, komanso kufupikitsa nthawi yomanga mopitilira kawiri.Kuonjezera ma geogrid pagawo laling'ono ndi pamwamba pa msewuwu kungathe kuchepetsa kupotoza, kuchepetsa kutsekemera, kuchedwetsa nthawi ya ming'alu ndi 3-9, ndikuchepetsa makulidwe a 36%.Imagwira ntchito ku dothi lamitundu yonse, popanda kufunikira kwa zinthu zochokera kumadera ena, ndipo imapulumutsa ntchito ndi nthawi.Ntchito yomangayi ndi yosavuta komanso yachangu, yomwe ingachepetse kwambiri ndalama zomanga.Kuphatikizana kwa geogrid, chitsimikizo chamtundu.

2. Ntchito ya two way plastic geogrid:
Kuonjezera mphamvu yobereka ya msewu (pansi) maziko ndi kutalikitsa moyo utumiki wa msewu (pansi) maziko.Pewani kugwa kapena kung'ambika kwa msewu (pansi) ndikusunga nthaka yokongola komanso yaudongo.Kumanga bwino, kupulumutsa nthawi, kupulumutsa ntchito, kufupikitsa nthawi yomanga ndikuchepetsa ndalama zokonzera.Pewani njira yotsekera kuti isang'ambe.Limbitsani malo otsetsereka ndikuteteza madzi ndi nthaka kutayika.Chepetsani makulidwe a khushoni ndikusunga mtengo.Thandizani malo otsetsereka obiriwira a mphasa zobzala udzu pamalo otsetsereka.Ikhoza kulowa m'malo mwa zitsulo zachitsulo ndikugwiritsidwa ntchito ngati denga labodza mumgodi wa malasha.
3. Ntchito ya geogrid yachitsulo-pulasitiki:
Amagwiritsidwa ntchito makamaka m'magawo a kulimbitsa maziko a nthaka yofewa, kusungitsa khoma ndi misewu yokhotakhota m'misewu yayikulu, njanji, ma abutments, njira, ma wharves, revetments, madamu, mayadi a slag, etc.
4. Ntchito ya galasi fiber geogrid:
Njira yakale ya konkire ya asphalt imalimbikitsidwa kulimbitsa phula ndi kupewa matenda.Mpanda wa konkire wa simenti umamangidwanso m'malo ophatikizika kuti ateteze ming'alu yowoneka yobwera chifukwa cha kuchepa kwa mbale.Kukulitsa misewu ndi kukonzanso ntchito, kuteteza ming'alu yobwera chifukwa cha mphambano zatsopano ndi zakale komanso kukhazikika kosagwirizana.Chithandizo cholimbitsa maziko a nthaka yofewa chimapangitsa kulekanitsa madzi ndikuphatikizana kwa nthaka yofewa, kuletsa bwino kukhazikika, kugawa kupanikizika kofanana, komanso kupititsa patsogolo mphamvu zonse za subgrade.Mtsinje wokhazikika wa msewu watsopano umapanga ming'alu ya shrinkage, ndipo kulimbikitsanso kumagwiritsidwa ntchito pofuna kuteteza ming'alu yapamsewu chifukwa cha kuwonetsera kwa ming'alu ya maziko.

2. Ndikwabwino bwanji kuphwanya kutopa kwa geogrid
Geogrid amagwiritsa ntchito ulusi wamphamvu kwambiri wa poliyesitala kapena ulusi wa polypropylene ngati zopangira, imagwiritsa ntchito njira yoluka yoluka, ndipo ulusi wopindika ndi ulusi pansaluyo ulibe kupindika, ndipo mphambanoyo imamangidwa ndikuphatikizidwa ndi ulusi wamphamvu kwambiri kuti apange malo omangirira olimba, opatsa kusewera kwathunthu kumakina ake.Ndiye kodi mukudziwa momwe kutopa kwake kwa crack kulili bwino?
Chotsatira chachikulu cha zokutira kwa asphalt pamiyala yakale ya simenti ndikuwongolera magwiridwe antchito amiyala, koma sichithandiza kwenikweni pakubala.Mpanda wolimba wa konkriti pansi pa zokutira umagwirabe ntchito yofunika kwambiri.Kuphimba kwa asphalt pamtunda wakale wa konkire wa asphalt ndi wosiyana.Kuphimba kwa asphalt kudzanyamula katunduyo pamodzi ndi miyala yakale ya konkire ya asphalt.Choncho, pamwamba pa phula pamwamba pa phula konkire sidzangowonetsa ming'alu yowonetsera, komanso kuwonetsa ming'alu ya kutopa chifukwa cha nthawi yayitali ya katunduyo.Tiyeni tiwunikire momwe phula la phula limapangidwira pamtunda wakale wa konkriti wa asphalt: chifukwa chophimba cha asphalt ndi chosanjikiza chapamwamba chokhala ndi zinthu zomwezo monga zokutira kwa asphalt, zikakumana ndi zolemetsa, njirayo idzakhala yopotoka.Kuphimba kwa asphalt komwe kumakhudza mwachindunji gudumu kumapanikizika, ndipo pamwamba pake pamakhala mphamvu yamphamvu m'dera lomwe lili kunja kwa magudumu.Chifukwa chakuti mphamvu zamagulu awiriwa zimakhala zosiyana komanso zimakhala pafupi ndi wina ndi mzake, zimakhala zosavuta kuti ziwonongeke pamagulu awiri opanikizika, ndiko kusintha kwadzidzidzi kwa mphamvu.Pansi pa mphamvu yolemetsa kwa nthawi yayitali, kusweka kwa kutopa kumachitika.
Geogrid amatha kufalitsa kupsinjika kwapamwambaku komanso kupsinjika kwapang'onopang'ono pamiyala ya asphalt kuti apange malo otchinga pakati pa madera awiri opsinjika, pomwe kupsinjika kumasintha pang'onopang'ono osati mwadzidzidzi, kuchepetsa kuwonongeka kwa kupsinjika kwadzidzidzi kusintha kwa phula.Kutsika kochepa kwa galasi fiber geogrid kumachepetsa kupotoza kwa msewu ndikuwonetsetsa kuti njirayo sikhala ndi kusintha kosinthika.
Unidirectional geogrid ndi extruded mu mapepala woonda ndi polima (polypropylene PP kapena polyethylene HDPE), ndiye kukhomerera mu maukonde wamba dzenje, ndiyeno anatambasula longitudinally.Pochita izi, polimayo ili mumzere wozungulira, ndikupanga mawonekedwe amtundu wa elliptical network ndi kugawa yunifolomu komanso mphamvu yayikulu ya node.
Unidirectional grid ndi mtundu wazinthu zamphamvu kwambiri za geosynthetic, zomwe zimatha kugawidwa mu gridi ya polypropylene unidirectional ndi gridi ya polyethylene unidirectional.
Uniaxial tensile geogrid ndi mtundu wa geotextile wamphamvu kwambiri wokhala ndi ma polima apamwamba kwambiri ngati zida zazikulu, zowonjezeredwa ndi anti ultraviolet ndi anti-aging agents.Pambuyo pa kupsinjika kwa uniaxial, mamolekyu oyambira omwe amagawika amasinthidwanso kukhala mzere wozungulira, kenako amachotsedwa mu mbale yopyapyala, kukhudza mauna ochiritsira, kenako amatambasulidwa motalika.Sayansi Yazinthu.
Pochita izi, polima amatsogozedwa ndi liniya state, kupanga mawonekedwe autali a elliptical network ndi kugawa yunifolomu komanso mphamvu yayikulu ya node.Kapangidwe kameneka kamakhala ndi mphamvu zolimbikira kwambiri komanso ma tensile modulus.Mphamvu yamakokedwe ndi 100-200Mpa, yomwe ili pafupi ndi mlingo wa chitsulo chochepa cha carbon, ndipo ndi yabwino kwambiri kuposa zipangizo zamakono kapena zomwe zilipo kale.
Makamaka, mankhwalawa ali ndi mlingo wapamwamba kwambiri wapadziko lonse lapansi (kutalika kwa 2% - 5%) mphamvu zamakokedwe komanso zolimba modulus.Amapereka dongosolo labwino la kudzipereka kwa nthaka ndi kufalikira.Mankhwalawa ali ndi mphamvu zolimba kwambiri (> 150Mpa) ndipo ndi oyenera ku dothi lamitundu yonse.Ndizinthu zolimbikitsira zomwe zimagwiritsidwa ntchito kwambiri pakadali pano.Makhalidwe ake akuluakulu ndi mphamvu zamakokedwe apamwamba, ntchito zabwino zokwawa, zomangamanga zosavuta komanso mtengo wotsika.