Xa iBarbara Walker Crossing yaqalwa ukwakhiwa ngo-2012, umsebenzi wayo oyintloko yayikukunceda abantu abahamba ngeenyawo nababalekayo kwiWildwood Trail yasePortland baphephe izithuthi ezixakekileyo kwiWest Burnside Road.
Yaba bubungqina boyilo oluqondayo ngobuhle, ukuxuba uluncedo kunye nobuhle kuluntu oluxabisa (kwaye lufuna) zombini ezi zinto.
Igqityiwe ngo-Okthobha ka-2019 yaza yavulwa kwangaloo nyanga, le bhulorho yindlela yabahambi ngeenyawo eziimitha ezili-180 ubude ecetywayo ukuba igobe kwaye yenzelwe ukuba idibane nehlathi elijikelezileyo.
Yenziwe ngaphandle kwendawo yiPortland Supreme Steel Company engasekhoyo, yanqunyulwa yaba ngamacandelo amathathu amakhulu, yaza yathunyelwa ngelori kwindawo leyo.
Ukuhlangabezana neemfuno ezibonakalayo nezokwakha kwakuthetha ukusebenzisa izixhobo ezaziza kufezekisa zonke iinjongo zeprojekthi ezikhethekileyo, zombini ngobugcisa nangolwakhiwo. Oku kuthetha ukusebenzisa iipayipi – kule meko iityhubhu zentsimbi ezakhiweyo ze-3.5″ kunye ne-5″ (ASTM A847) ezenzelwe izakhiwo ezifuna uqhagamshelo oludibeneyo okanye olunamabholiti. Eminye imibhobho iveziwe (enye into ephambili yeCorten) kwaye eminye ipeyintwe ngombala oluhlaza ukuze ifane nophahla lwehlathi.
U-Ed Carpenter, umyili kunye nomzobi ogxile kwiindawo ezinkulu zikawonke-wonke, uthe wayeneenjongo ezininzi engqondweni yakhe xa wayecinga ngale bhulorho. Phakathi kwazo, ibhulorho kufuneka idityaniswe nomxholo wehlathi, oku kuqhubeka kwemvakalelo namava omzila, kwaye kufuneka ibe buthathaka kwaye icace kangangoko kunokwenzeka.
“Ngenxa yokuba enye yezona njongo zam zibalulekileyo kuyilo yayikukwenza ibhulorho ibe buthathaka kwaye ibonakale, ndandifuna izixhobo ezisebenzayo kakhulu kunye nenkqubo yokwakha esebenza kakuhle kangangoko—ngoko ke, ii-truss ezinee-chord ezintathu,” utshilo uCarpenter, okwangumthandi wangaphandle. .Ndisebenza kwinkqubo enkulu yendlela yasePortland kangangeminyaka engaphezu kwama-40.” Ungayakha ngezinye izinto, kodwa iipayipi zentsimbi okanye iipayipi ziyindlela efanelekileyo.
Ngokwembono yokwakha esebenzayo, ukufezekisa konke oku akulula. UStuart Finney, injineli yolwakhiwo kwiofisi yobunjineli yenkampani yasePortland iKPFF kunye nomphathi weprojekthi yebhulorho wangaphambili, uthe ukuwelda ngempumelelo zonke izinto kwiindawo zokudibana kweTYK apho zonke iipayipi ezixhasayo zidibana khona mhlawumbi yeyona nto inzima. Enye yenkalo yomzamo wonke. Ngokukodwa, zonke ii-engile ezahlukeneyo ezifunekayo kwiintlobo ezahlukeneyo ze-welds, ezifana ne-fillet welds kunye ne-grooves, zenze imingeni enzima kwiqela lokwakha.
“Ngokuyintloko yonke ijoyinti yahlukile,” utshilo uFinney, obesebenza ngobugcisa kangangeminyaka engama-20.” Kwakufuneka benze ijoyinti nganye igqibelele ukuze zonke ezi payipi zidityaniswe kwi-node enye, kwaye babenokufumana ii-welds ezaneleyo ezijikeleze yonke ipayipi.
Ibhulorho yabahambi ngeenyawo iBarbara Walker Crossing inqumla iBurnside Road enabantu abaninzi ePortland. Yaqala ukusebenza ngo-Okthobha ka-2019. UShan Bliss
"Ii-welds kufuneka zitshintshwe ngokupheleleyo. Uku-welding ngokwenene kunokuba yenye yezona zinto zinzima kakhulu ekwenzeni izinto."
Igama likaFerry, uBarbara Walker (1935-2014), ebesoloko eyintsika yemizamo yolondolozo lwendalo ePortland kangangeminyaka, kwaye naye unamandla endalo. Udlale indima ebalulekileyo kwiiprojekthi ezininzi zikawonke-wonke ePortland, kuquka iMarquam Nature Park, iPioneer Courthouse Square kunye nePowell Butte Nature Park. Ukwakhuthaze ngokungakhathali into eyathi yaziwa ngokuba yi-40-Mile Loop, eyayiquka iWildwood Trail kunye neBridge.
Kanye njengokuba uWalker eqokelele malunga ne-$500,000 kuluntu lwePioneer Courthouse Square ($15 ngelitye ngalinye lokuhamba), iPortland Parks Foundation engenzi nzuzo iqokelele i-$2.2 yezigidi kwiminikelo yabucala emalunga nama-900 ukunceda ukuxhasa ibhulorho. ISixeko sasePortland, iiPortland Parks & Recreation kunye nezinye iinkampani zinegalelo eliseleyo kwindleko emalunga ne-$4 yezigidi.
UCarpenter uthe ukuhlanganisa amazwi amaninzi kunye namazwi kwiprojekthi kube nzima, kodwa kufanelekile.
“Ndicinga ukuba amava abaluleke kakhulu yintsebenziswano enkulu yoluntu, ukuzingca okukhulu, kunye nokuzibandakanya okukhulu — abantu bayayihlawulela loo nto,” utshilo uCarpenter. “Akukuphela kwabantu ngabanye, kodwa izixeko kunye namaphondo. Ngumzamo omkhulu wentsebenziswano.”
UFinney wongeze ngelithi yena neqela lakhe, kunye nabavelisi abanoxanduva lokwenza uyilo lube ngokoqobo, kwafuneka boyise imingeni emininzi kwimodeli ye-3D abayenzileyo, ngenxa nje yobunzima beejoyinti kunye nokufakelwa kwazo.
“Sisebenzisana nabacwangcisi bethu ukuqinisekisa ukuba zonke iimodeli zihambelana kuba kwakhona, akukho ndawo yokwenza iimpazamo ngezi joyinti ezininzi ngenxa yobunzima bejometri,” utshilo uFinney. “Ngokuqinisekileyo iyinkimbinkimbi kakhulu kunezinye. Iibhulorho ezininzi zithe tye, kwanezo zigobileyo zineegophe, kwaye izinto zokwakha zilula kakhulu.
"Ngenxa yoko, kukho ubunzima obuncinci obuvelayo kule projekthi. Ndingathi ngokuqinisekileyo inzima ngaphezu [kweprojekthi eqhelekileyo]. Kuthatha umsebenzi omninzi ukuze wonke umntu afezekise le projekthi."
Nangona kunjalo, ngokutsho kukaCarpenter, phakathi kwezinto ezibalulekileyo kubunzima bebhulorho, into eyenza ibhulorho ibe nesiphumo sayo iyonke yidekhi egobileyo. Ngaba kufanelekile ukwenza oku? Ngokuyintloko, ewe.
“Ndicinga ukuba uyilo oluhle ludla ngokuqala ngokusebenziseka luze luqhubekele phambili,” utshilo uCarpenter. “Yiloo nto kanye eyenzekileyo kule bhulorho. Ndicinga ukuba kum, eyona nto ibalulekileyo yidekhi egobileyo. Kule meko, andiziva kamnandi nge-candy bar kuba yonke indlela iyaguquguquka kwaye iyagoba. Andifuni nje ukujika ngasekhohlo ngendlela ebukhali ngaphesheya kwebhulorho ndize ndijike ngasekhohlo ndiqhubeke.
Ibhulorho yabahambi ngeenyawo iBarbara Walker Crossing yenziwe ngaphandle kwendawo, yahlulwahlulwa yangamacandelo amabini amakhulu, yaza yathunyelwa ngelori ukuya kwindawo ekuyo ngoku. Isiseko sePortland Parks
"Uyenza njani idekhi egobileyo? Ewe, kuvela ukuba, i-three-chord truss isebenza kakuhle kakhulu kwigophe. Ufumana umlinganiselo olungileyo kakhulu wobunzulu-ukuya-kwi-span. Ngoko ke, ungenza ntoni nge-three-chord truss ukuyenza ibe ntle kwaye ibe yintle, kwaye ubhekisele kwihlathi ngendlela eyenza libonakale ngathi alinakuba kwenye indawo? Qala ngokusebenziseka, uze uqhubekele phambili - lithini igama? - uye kwi-fantasy. Okanye ukusuka ekusebenzisekeni ukuya ekucingeni .Abanye abantu banokukwenza ngenye indlela, kodwa yile ndlela kanye endisebenza ngayo."
UCarpenter uncoma ngokukodwa iqela le-KPFF ngokumnika ugqozi awayeludinga ukuze aphumeze imibhobho ngaphaya kwedekhi, nto leyo eyanika ibhulorho imvakalelo yendalo, evela ehlathini. Le projekthi ithathe malunga neminyaka esixhenxe ukususela ekuqaleni ukuya ekuvulweni kwayo okukhulu, kodwa uFinney wayevuya kakhulu kukufumana ithuba lokuba yinxalenye yayo.
“Kumnandi ukuba nento esiza kuyinika esi sixeko kwaye sizingce ngayo, kodwa kumnandi nokujongana nomceli mngeni wobunjineli ococekileyo,” utshilo uFinney.
Ngokutsho kwePortland Parks Foundation, malunga nabantu abangama-80,000 abahamba ngeenyawo baza kusebenzisa ibhulorho yabahambi ngeenyawo minyaka le, nto leyo esindisa ingxaki yokuwela icandelo lendlela elithwala iimoto ezimalunga nama-20,000 ngosuku.
Namhlanje, le bhulorho iqhubeka nombono kaWalker wokudibanisa abemi basePortland kunye neendwendwe kubuhle bendalo ejikelezileyo.
“Sifuna ukunika abantu basezidolophini ithuba lokufikelela kwindalo,” utshilo uWalker (ocatshulwe yiWorld Forestry Center).”Uchulumanco ngendalo luvela ekubeni ngaphandle. Ayinakufundwa ngokufihlakeleyo. Ngokubona indalo ngokwako, abantu banomnqweno wokuba ngabaphathi bomhlaba.”
ULincoln Brunner ngumhleli weThe Tube & Pipe Journal. Eli lithuba lakhe lesibini eTPJ, apho wasebenza njengomhleli iminyaka emibini ngaphambi kokuba ancede ekuqaliseni iTheFabricator.com njengomphathi wokuqala womxholo wewebhu we-FMA. Emva kwaloo mava amnandi kakhulu, uchithe iminyaka eli-17 kwicandelo leenkampani ezingenzi nzuzo njengentatheli yamazwe ngamazwe kunye nomlawuli wonxibelelwano. Ungumbhali oshicilelweyo kwaye ubhale kakhulu kwiinkalo ezahlukeneyo zoshishino lokwenziwa kwesinyithi.
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