Kudzorera mugwagwa mukuru weArizona kuenda kuPortland simende kongiri kungangoratidza kubatsira kwekushandisa kugaya madhaimani seimwe nzira yekukuya nekuzadza.Maonero anoratidza kuti mukati memakore makumi matatu, mari yekugadzirisa ichaderedzwa neUSD 3.9 bhiriyoni.
Ichi chinyorwa chakavakirwa pane webinar yakatanga kuitwa panguva yeInternational Grooving and Grinding Association (IGGA) Technical Conference muna Zvita 2020. Tarisa demo yakazara pazasi.
Vagari munharaunda yeFenieni vanoda migwagwa yakatsetseka, yakanaka, uye yakanyarara.Nekudaro, nekuda kwekuwedzera kwehuwandu hwevanhu munzvimbo iyi uye kusakwana kwemari yekuchengeta, mamiriro emigwagwa munzvimbo iyi ave kuderera mumakore gumi apfuura.Iyo Arizona Dhipatimendi Rezvekutakurwa (ADOT) iri kudzidza zvigadziriso zvekugadzira kuchengetedza network yayo yemigwagwa uye nekupa mhando dzemigwagwa inotarisirwa neveruzhinji.
Phoenix iguta rechishanu rine vanhu vakawanda muUnited States, uye ichiri kukura.Guta iri 435-mamaira network yemigwagwa nemabhiriji inochengetedzwa neArizona Department of Transportation (ADOT) nzvimbo yepakati, mizhinji yacho ine mikoto mina ine migwagwa mikuru yemotokari yepamusoro (HOV).Nebhajeti rekuvaka reUS$500 miriyoni pagore, dunhu iri rinowanzoita zvirongwa zvekuvaka 20 kusvika ku25 pamigwagwa ine vanhu vakawanda gore negore.
Arizona yanga ichishandisa kongiri pavements kubva kuma1920s.Concrete inogona kushandiswa kwemakumi emakore uye inongoda kugadziriswa kwega kwega 20-25 makore.KuArizona, makore makumi mana echiitiko chakabudirira akaita kuti ishandiswe panguva yekuvakwa kwemigwagwa mikuru yehurumende muma1960s.Panguva iyoyo, kugadzira mugwagwa nekongiri kwaireva kuita kutengeserana maererano neruzha rwomumugwagwa.Munguva iyi, nzvimbo yekongiri inopedzwa netinning (kudhonza simbi reki pane kongiri pamusoro perpendicular kune traffic kuyerera), uye matai anotyaira pane yakavharwa kongiri inoburitsa ruzha, inobatana kuhwihwidza.Muna 2003, kugadzirisa dambudziko reruzha, 1-in.Asphalt Rubber Friction Layer (AR-ACFC) yakaiswa pamusoro pePortland Cement Concrete (PCC).Izvi zvinopa chitarisiko chakafanana, ruzha rwakanyarara uye kufamba kwakasununguka.Nekudaro, kuchengetedza pamusoro peAR-ACFC kwaratidza kuve kwakaoma.
Hupenyu hwekugadzira hweAR-ACFC hunosvika makore gumi.Migwagwa mikuru yeArizona yadarika hupenyu hwavo hwekugadzira uye vari kuchembera.Stratification uye zvine chekuita nenyaya dzinounza matambudziko kune vatyairi uye Ministry of Transportation.Kunyangwe delamination ichiwanzo konzera kurasikirwa kweinenge 1 inch yekudzika kwemugwagwa (nekuti 1-inch gobvu rerabha asphalt rakapatsanurwa kubva kune kongiri iri pazasi), nzvimbo yekubvisa inoonekwa segomba neveruzhinji vanofamba uye inoonekwa seyakakomba. dambudziko.
Mushure mekuyedza kukuya kwedhaimondi, chizvarwa chinotevera kongiri, uye kupedzisa nzvimbo yekongiri neinotsvedza grinder kana micromilling, ADOT yakatsunga kuti iyo longitudinal magadzirirwo anowanikwa nedhaimani kugaya inopa kutaridzika kwecorduroy uye kuita kwakanaka kwekutyaira (Sezvinoratidzwa neiri shoma IRI) nhamba. ) uye kubudiswa kweruzha rwakaderera.Randy Everett uye Arizona Dhipatimendi rekutakura
Arizona inoshandisa International Roughness Index (IRI) kuyera mamiriro emigwagwa, uye nhamba yacho yave kuderera.(IRI imhando ye roughness statistical data, iyo inenge inoshandiswa pasi rose nemasangano enyika sechiratidzo chekushanda kwepavement management system yavo. Iyo yakaderera kukosha, idiki iyo roughness, iyo inodikanwa).Zvinoenderana nezviyero zveIRI zvakaitwa muna 2010, 72% yemigwagwa mikuru mudunhu iri mune yakanaka.Pakazosvika 2018, chikamu ichi chainge chadzika kusvika pa53%.Nzira dzeNational highway system dziri kuratidzawo kudzikira.Kuyerwa kwakaitwa muna 2010 kwakaratidza kuti chikamu che68% chemigwagwa yaive muchimiro chakanaka.Pakazosvika 2018, nhamba iyi yakanga yadzika kusvika pa35%.
Sezvo mitengo yakawedzera - uye bhajeti yaisakwanisa kuenderera - muna Kubvumbi 2019, ADOT yakatanga kutsvaga sarudzo dziri nani dzekuchengetera kupfuura mubhokisi rematurusi rakapfuura.Kune mapavesheni achiri muchimiro chakanaka mukati memakore gumi kusvika gumi nemashanu ehupenyu hwekugadzira hwindo-uye zviri kuramba zvichinyanya kukosha kuti dhipatimendi richengete nzira iripo iri muchimiro chakanaka-sarudzo dzinosanganisira kuvharika seal, kupfapfaidza sealing (kuisa yakatetepa. denga rechiedza, Slowified solidified asphalt emulsion), kana kugadzirisa makomba ega.Pamapavhu anodarika hupenyu hwekugadzira, imwe sarudzo ndeyekukuya kubva kune yakaora asphalt uye kuisa mutsva werubha asphalt pamusoro.Zvisinei, nokuda kwekukura kwenzvimbo inoda kugadziriswa, izvi zvinoratidza kuti zvinodhura.Chimwe chipingamupinyi kune chero mhinduro inoda kudzokorora kugaya kweasphalt pamusoro ndeyekuti michina yekukuya ichakanganisa nekukuvadza kongiri yepasi, uye kurasikirwa kwekongiri zvinhu pamajoini zvakanyanya kuoma.
Chii chaizoitika kana Arizona ikadzokera kune yekutanga PCC pamusoro?ADOT inoziva kuti migwagwa yekongiri muhurumende yakagadzirirwa kupa hurefu hwehupenyu kugadzikana.Dhipatimendi rakaona kuti kana vakakwanisa kushandisa PCC yepasi kuvandudza nzvimbo yayo yepakutanga yemazino kuti iite mugwagwa wakanyarara uye unotakurika, mugwagwa wakagadziriswa unogona kugara kwenguva refu uye unoda kugadziriswa.Iyo zvakare yakanyanya kuderera pane asphalt.
Sechikamu chepurojekiti iri paSR 101 kuchamhembe kwePhoenix, iyo AR-ACFC layer yakabviswa, saka ADOT yakaisa zvikamu zvina zvekuedza kuongorora mhinduro dzenguva yemberi dzinoshandisa kongiri iripo uku uchivimbisa kutsvedzerera, kukwira kwakanyarara uye kutaridzika kwakanaka kwemugwagwa.Dhipatimendi rakaongorora kukuya kwedhaimondi neNext Generation Concrete Surface (NGCS), chimiro chine ivhu rakadzorwa uye chimiro chisina kunaka kana kudzika pasi, icho chakagadziridzwa seyakanyanya kudzika-ruzha kongiri pavement.ADOT iri kufungawo nezve kushandiswa kwe grinder inotsvedza (nzira iyo muchina unotungamira mabheji ebhora kumugwagwa wepamusoro kuti uvandudze friction maitiro) kana micro-milling kupedzisa kongiri.Mushure mekuedza nzira imwe neimwe, ADOT yakasarudza kuti iyo longitudinal texture inowanikwa nedhaimondi grinding inopa chitarisiko chinofadza checorduroy pamwe chete nechiitiko chakanaka chekutasva (sezvinoratidzwa nehuwandu hweIRI hunokosha) uye ruzha rushoma.Kukuya kwedhaimondi kwaratidzawo kuve kwakapfava zvakakwana kudzivirira nzvimbo dzekongiri, kunyanya dzakatenderedza majoini, idzo dzakambokuvadzwa nekugaya.Diamond kugaya zvakare inodhura-inoshanda mhinduro.
Muna Chivabvu 2019, ADOT yakafunga kukuya-dhaimondi chikamu chidiki cheSR 202 chiri kumaodzanyemba kwePhoenix.Mugwagwa weAR-ACFC wemakore gumi nemashanu wakanga usina kusimba uye wakaturikidzana zvekuti matombo akabhenda aikandwa pagirazi remhepo, uye vatyairi vaigunun’una pamusoro pekukuvadzwa kwegirazi remhepo nematombo anobhururuka mazuva ese.Huwandu hwezvichemo zvekurasikirwa mudunhu iri hwakanyanya kudarika mune mamwe matunhu enyika.Mujinga menzira zvakare mune ruzha uye zvakaoma kutyaira.ADOT yakasarudza madhaimani-akapedza kupedzisa kwenzira mbiri dzekurudyi pamwe neSR 202 hafu yemaira kureba.Vakashandisa bhaketi rekurodha kubvisa iyo iripo AR-ACFC layer pasina kukuvadza kongiri pazasi.Bazi iri rakabudirira kuyedza nzira iyi muna Kubvumbi apo vaizeya nzira dzekudzokera kumugwagwa wePCC.Mushure mekunge chirongwa ichi chapera, mumiriri weADOT akaona kuti mutyairi aisimuka kubva munzira yeAR-ACFC achienda kune yedhaimani pasi kongiri nzira kuti anzwe mafambiro akavandudzwa uye hunhu.
Kunyange zvazvo asiri mapurojekiti ose ekuedza akapedzwa, zvakambowanikwa pamitengo zvinoratidza kuti mari inochengetwa nekushandiswa kwekongiri uye kukuya madhaimondi kuti chitarisiko chakanaka, kutsvedzereka, uye ruzha ingaderedza kugadziridza nemari inosvika mabhiriyoni 3,9 emadhora pagore.Kupfuura makore makumi matatu.Randy Everett uye Arizona Dhipatimendi rekutakura
Panguva ino, Maricopa Government Association (MAG) yakaburitsa chirevo chekuongorora ruzha rwemumugwagwa mukuru uye kutyaira.Chirevo chinobvuma kuoma kwekuchengetedza mambure emigwagwa uye chinotarisa pane ruzha maitiro emugwagwa.Mhedziso yakakosha ndeyekuti nekuda kwekuti ruzha rweruzha rweAR-ACFC runonyangarika nekukurumidza, "kurapa kwedhaimani pasi kunofanirwa kutariswa panzvimbo yerabha asphalt yakavharika."Imwe budiriro yakaitika panguva imwe cheteyo ikondirakiti yekutenga zvinhu inobvumira kukuya madhaimondi Kondirakiti yakaunzwa kuti igadziriswe uye ivakwe.
ADOT inotenda kuti inguva yekutora danho rinotevera uye inoronga kutanga purojekiti yakakura yekukuya madhaimondi paSR 202 muna February 2020. Basa racho rinosanganisira chikamu chemakiromita mana-marefu, mativi mana, kusanganisira zvikamu zvakatenuka.Nzvimbo yacho yakanga yakakura zvikuru zvokusagona kushandisa simbi kuti ibvise asphalt, saka muchina wokugaya wakashandiswa.Dhipatimendi rinocheka mitsetse murubha asphalt kuti kontrakta yekugaya ishandise segwara panguva yekugaya.Nekuita kuti zvive nyore kune opareta kuona iyo PCC pamusoro pechivharo, iyo milling midziyo inogona kugadziridzwa uye kukuvadzwa kwekongiri yepasi kunogona kuderedzwa.Iyo yekupedzisira yedhaimani-pasi pepamusoro peSR 202 inosangana neyese ADOT zviyero-yakanyarara, yakatsetseka uye inoyevedza-ichienzaniswa neyeasphalt nzvimbo, iyo IRI kukosha kwainakidza kwazvo muma1920 nema1930s.Aya anofananidzwa neruzha maitiro anogona kuwanikwa nekuti kunyangwe iyo itsva AR-ACFC pavement ingangoita 5 dB yakanyarara pane ivhu remadhaimani, kana AR-ACFC pavement ichishandiswa kwemakore mashanu kusvika 9, mhedzisiro yekuyera kwayo inofananidzwa kana yakakwirira Iyo dB level.Haisi chete ruzha rweiyo SR 202 yepasi madhaimani yakadzikira zvakanyanya kune vatyairi, asi nzira yemugwagwa inoburitsawo ruzha rushoma munharaunda dziri pedyo.
Kubudirira kwemapurojekiti avo ekutanga kwakakurudzira ADOT kutanga mamwe matatu mapurojekiti ekuyedza ekukuya madhaimondi.Kukuya kwemadhaimani kweLoop 101 Price Freeway kwapera.Kukuya kwemadhaimondi kweLoop 101 Pima Freeway kuchaitwa kutanga kwa2021, uye kuvakwa kweLoop 101 I-17 kusvika 75th Avenue kunotarisirwa kuitwa mumakore mashanu anotevera.ADOT ichacherechedza kushanda kwezvinhu zvose kutarisa kutsigirwa kwezvisungo, kana konkrete yakasvuura, uye kuchengetedza kwehutano uye kutasva.
Kunyangwe asiri ese mapurojekiti ekuyedza akapedzwa, data rakaunganidzwa kusvika pari zvino rinotsigira kufunga kwekukuya madhaimondi seimwe nzira yekukuya nekuzadza.Mhedzisiro yekutanga yekuferefeta kwemitengo inoratidza kuti kuchengetedza kwakabatana nekushandisa kongiri pavement uye kugaya madhaimondi kugadzirisa kutaridzika, kutsvedzerera uye ruzha kunogona kuderedza mari yekugadzirisa nemadhora 3.9 bhiriyoni mukati memakore makumi matatu.
Nokushandisa konkrete iripo muPoenix, kwete chete bhajeti rekugadzirisa rinogona kuwedzerwa uye migwagwa yakawanda inochengetwa mumamiriro ezvinhu akanaka, asi kusimba kwekongiri kunovimbisa kuti kukanganisa kune chokuita nekugadzirisa migwagwa kunoderedzwa.Chinonyanya kukosha, veruzhinji vanozokwanisa kunakidzwa nekutyaira kwakatsetseka uye kwakanyarara.
Randy Everett mukuru wedhipatimendi maneja weDhipatimendi Rezvekutakurwa muCentral Arizona.
IGGA isangano risingabatsiri rekutengeserana rakavambwa muna 1972 neboka revashandi veindasitiri vakazvitsaurira, vakazvipira kusimudzira madhaimani ekukuya uye grooving maitiro ePortland simende kongiri uye nzvimbo dzeasphalt.Muna 1995, IGGA yakabatana neAmerican Concrete Pavement Association (ACPA), ichigadzira yanhasi IGGA/ACPA Concrete Pavement Protection Partnership (IGGA/ACPA CP3).Nhasi, kudyidzana uku inyanzvi yehunyanzvi uye mutungamiriri weindasitiri mukushambadzira kwepasirese kwenzvimbo dzakagadziridzwa dzepavement, kugadzirisa kongiri pavement uye kuchengetedzwa kwepavement.Chinangwa cheIGGA nderekuva inotungamira tekinoroji uye sosi yekusimudzira yekugamuchirwa uye kushandiswa kwakaringana kwekukuya kwedhaimondi uye grooving, pamwe nekuchengetedza PCC uye kudzoreredza.
Nguva yekutumira: Sep-08-2021