Ngesikhathi iBarbara Walker Crossing iqala ukwakhiwa ngo-2012, umsebenzi wayo oyinhloko kwakuwukusindisa abahambi ngezinyawo nabagijimi eWildwood Trail yasePortland ekuhluphekeni kokugwema ithrafikhi emgwaqweni omatasa waseWest Burnside.
Kwaba ubufakazi bokwakhiwa kwezakhiwo okunombono wobuhle, ukuhlanganisa ukusebenziseka kanye nobuhle bomphakathi owawukwazisa (futhi ukufuna) kokubili.
Njengoba laqedwa ngo-Okthoba 2019 futhi lavulwa ngenyanga efanayo, ibhuloho liyindlela yokuhamba ngezinyawo engamamitha angu-180 ubude ehlelelwe ukugoba futhi iklanyelwe ukuhlangana nehlathi elizungezile.
Yakhiwa ngaphandle kwendawo yiPortland Supreme Steel Company engasekho, yahlukaniswa yaba izingxenye ezintathu eziyinhloko, yabe isithuthwa ngeloli yayiswa endaweni.
Ukuhlangabezana nezidingo ezibonakalayo nezokwakha kwakusho ukusebenzisa izinto ezazizofeza yonke imigomo yephrojekthi eyingqayizivele kakhulu, kokubili ngokobuciko nangokwesakhiwo. Lokhu kusho ukusebenzisa amapayipi – kulokhu amapayipi ensimbi angu-3.5″ kanye no-5″ (ASTM A847) aklanyelwe izakhiwo ezidinga ukuxhumeka okuhlanganisiwe noma okunamabholidi. Amanye amapayipi avele obala (esinye isici esibalulekile seCorten) kanti amanye apendwe ngombala oluhlaza ukuze afane nophahla lwehlathi.
U-Ed Carpenter, umklami nomdwebi ogxile ekufakweni okukhulu komphakathi, uthe wayenemigomo eminingana engqondweni yakhe lapho ecabanga ngaleli bhuloho. Phakathi kwayo, ibhuloho kufanele lihlanganiswe nomongo wehlathi, okuwukuqhubeka komuzwa kanye nokuhlangenwe nakho kwendlela, futhi kufanele libe mnene futhi licace ngangokunokwenzeka.
“Ngenxa yokuthi omunye wemigomo yami ebaluleke kakhulu yokuklama kwakuwukwenza ibhuloho libe buthakathaka futhi libonakale, ngangidinga izinto zokwakha ezisebenza kahle kakhulu kanye nesistimu yokwakha esebenza kahle kakhulu ngangokunokwenzeka—ngakho-ke, izikhonkwane ezintathu,” kusho uCarpenter, naye othanda kakhulu ukuphuma ngaphandle. .Ngisebenza ohlelweni olukhulu lwemizila yasePortland iminyaka engaphezu kwengu-40.” Ungalakha ngezinye izinto, kodwa amapayipi ensimbi noma amapayipi kumane kuyisinqumo esinengqondo.
Ngokombono wokwakha osebenzayo, ukufeza konke lokhu akulula. UStuart Finney, unjiniyela wezakhiwo ehhovisi lasePortland lenkampani yobunjiniyela i-KPFF kanye nowayengumphathi wephrojekthi yebhuloho, uthe ukushisela ngempumelelo zonke izingxenye ezinhlanganweni ze-TYK lapho wonke amapayipi asekelayo ehlangana khona mhlawumbe kwakuyinto enzima kakhulu. Esinye isici somzamo wonke. Ikakhulukazi, wonke ama-engeli ahlukene adingekayo ezinhlotsheni ezahlukene zokushisela, njenge-fillet welds kanye ne-grooves, kudale izinselele ezinkulu eqenjini lokwakha.
“Empeleni yonke ijoyinti ihlukile,” kusho uFinney, obelokhu eqhuba lo msebenzi iminyaka engama-20.” Kwakudingeka benze yonke ijoyinti ibe ephelele ukuze wonke la mapayipi ahlanganiswe ndawonye endaweni eyodwa, futhi bakwazi ukuthola ama-weld anele azungeze wonke amapayipi.
Ibhuloho labahamba ngezinyawo iBarbara Walker Crossing lidlula eBurnside Road ePortland enabantu abaningi. Laqala ukusebenza ngo-Okthoba 2019. Shane Bliss
"Ama-weld kumele aguqulwe ngokuphelele. Ukushisela kungaba enye yezingxenye eziyinkimbinkimbi kakhulu zokukhiqiza."
Igama likaFerry, uBarbara Walker (1935-2014), ubelokhu eyinsika yemizamo yokulondolozwa kwemvelo yasePortland iminyaka eminingi, futhi naye unamandla emvelo. Udlale indima ebalulekile kumaphrojekthi amaningi omphakathi ePortland, okuhlanganisa iMarquam Nature Park, iPioneer Courthouse Square kanye nePowell Butte Nature Park. Uphinde wakhuthaza ngokungakhathali lokho okwaziwa ngokuthi i-40-Mile Loop, eyayihlanganisa iWildwood Trail and Bridge.
Njengoba nje uWalker eqoqe imali engaba ngu-$500,000 emphakathini yePioneer Courthouse Square ($15 ngetshe ngalinye lokugandaya), inhlangano engenzi nzuzo iPortland Parks Foundation iqoqe imali engaba ngu-$2.2 million eminikelweni yangasese engaba ngu-900 ukusiza ekuxhaseni ibhuloho. IDolobha lasePortland, iPortland Parks & Recreation kanye nezinye izinhlangano zinikele ngemali esele engaba ngu-$4 million.
UCarpenter uthe ukuhlanganisa amazwi amaningi kulo msebenzi kube yinselele, kodwa kuyafaneleka.
“Ngicabanga ukuthi okuhlangenwe nakho okubaluleke kakhulu ukubambisana okukhulu komphakathi, ukuziqhenya okukhulu, kanye nokuzibandakanya okukhulu — abantu bayakhokhela lokho,” kusho uCarpenter. “Hhayi abantu ngabanye kuphela, kodwa amadolobha nezifunda. Kungumzamo omkhulu wokubambisana.”
UFinney wengeze ngokuthi yena nethimba lakhe, kanye nabakhiqizi abanomthwalo wokwenza imiklamo iphile, kwadingeka banqobe izinselele eziningi ekubumbeni kwe-3D abakwenzile, ngenxa nje yazo zonke izinkimbinkimbi zamajoyinti kanye nokufakwa kwawo.
“Sisebenzisana nabakhi bethu bezinto ukuqinisekisa ukuthi wonke amamodeli ayahambisana ngoba futhi, akukho ndawo yokwenza iphutha ngamajoyinti amaningi alawa ngenxa yobunzima be-geometry,” kusho uFinney. “Kuyinkimbinkimbi kakhulu kunaningi. Amabhuloho amaningi aqondile, ngisho nalawo agobile anamajika, futhi izinto zokwakha zilula kakhulu.
"Ngenxa yalokho, kunezinto eziningi ezincane eziyinkimbinkimbi ezivelayo kule phrojekthi. Ngingathi ngokuqinisekile iyinkimbinkimbi kakhulu kunephrojekthi evamile. Kudinga umsebenzi omningi ukuze wonke umuntu afeze le phrojekthi."
Kodwa-ke, ngokusho kukaCarpenter, phakathi kwezinto ezibalulekile ebunzimeni bebhuloho, okwenza ibhuloho libe nomphumela walo jikelele yidekhi egobile. Ingabe kufanelekile ukuzikhandla ukwenza lokhu? Ngokuyinhloko, yebo.
“Ngicabanga ukuthi ukwakheka okuhle kuvame ukuqala ngokusebenziseka bese kudlulela kokunye,” kusho uCarpenter. “Yilokho kanye okwenzekile kuleli bhuloho. Ngicabanga ukuthi kimi, into ebaluleke kakhulu idekhi eligobile. Kulesi simo, angizizwa kahle ngebha yamaswidi ngoba yonke indlela iyaguquguquka futhi iyagoba. Angifuni nje ukujika ngakwesobunxele ngaphesheya kwebhuloho bese ngijika ngakwesobunxele ngiqhubeke.
Ibhuloho labahamba ngezinyawo iBarbara Walker Crossing lenziwa ngaphandle kwendawo, lahlukaniswa laba izingxenye ezimbili eziyinhloko, labe selithuthwa ngamaloli laya endaweni yalo yamanje. I-Portland Parks Foundation
"Uyenza kanjani idekhi egobile? Nokho, kuvela ukuthi, i-truss enama-chord amathathu isebenza kahle kakhulu egobileni. Uthola isilinganiso esihle kakhulu sokujula-kuya-span. Ngakho-ke, yini ongayenza nge-truss enama-chord amathathu ukuze uyenze ibe yinhle futhi ibe yinhle, bese ubhekisela ehlathini ngendlela eyenza kubonakale sengathi ayinakuba kwenye indawo? Qala ngokusebenziseka, bese udlulela - liyini igama? - uye enganekwaneni. Noma kusukela ekusebenzeni kuya emcabangweni. Abanye abantu bangakwenza ngendlela ehlukile, kodwa yileyo ndlela engisebenza ngayo."
UCarpenter ubonga kakhulu ithimba le-KPFF ngokumnika ugqozi ayeludinga ukuze akhiphe amapayipi ngale kwedekhi, okwanikeza ibhuloho umuzwa wemvelo novela ngokushesha ehlathini. Lo msebenzi wathatha cishe iminyaka eyisikhombisa kusukela ekuqaleni kuze kube sekuvulweni okukhulu, kodwa uFinney wajabula kakhulu ngokuthola ithuba lokuba yingxenye yawo.
“Kuhle ukuba nokuthile ongakunikeza leli dolobha futhi uziqhenye ngakho, kodwa futhi kuhle ukubhekana nenselele yobunjiniyela ehlelekile,” kusho uFinney.
Ngokusho kwePortland Parks Foundation, abantu abahamba ngezinyawo abangaba ngu-80,000 bazosebenzisa ibhuloho labahamba ngezinyawo minyaka yonke, okusindisa inkinga yokuwela ingxenye yomgwaqo ethwala izimoto ezingaba ngu-20,000 ngosuku.
Namuhla, leli bhuloho liqhubeka nombono kaWalker wokuxhumanisa izakhamuzi zasePortland nezivakashi nobuhle bendawo yemvelo ezungezile.
“Sidinga ukunikeza abantu basemadolobheni ukufinyelela emvelweni,” kusho uWalker (ocashunwe yiWorld Forestry Center) wake wathi. “Injabulo ngemvelo ivela ekubeni ngaphandle. Ayikwazi ukufundwa kalula. Ngokubona imvelo mathupha, abantu banesifiso sokuba ngabaphathi bomhlaba.”
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