Pamene Barbara Walker Crossing idapangidwa koyamba mu 2012, ntchito yake yayikulu inali kupulumutsa oyenda ndi othamanga pa Portland's Wildwood Trail zovuta zopewera magalimoto pamsewu wotanganidwa wa West Burnside.
Zinakhala umboni wa zomangamanga zodziwika bwino, kuphatikiza zothandiza komanso kukongola kwa anthu ammudzi omwe amafunikira (ndikuwafuna) onse.
Umalizidwa mu Okutobala 2019 ndikutsegulira mwezi womwewo, mlathowu ndi msewu wa anthu oyenda pansi wa 180 womwe wakonzedwa kuti ukhale wokhota komanso wopangidwa kuti ugwirizane ndi nkhalango yozungulira.
Idapangidwa kunja kwa malo ndi kampani yomwe tsopano yatha ya Portland Supreme Steel Company, idadulidwa m'magawo atatu akulu, kenako ndikuyitumiza kumaloko.
Kukwaniritsa zofunikira zowoneka ndi zomangamanga kumatanthauza kugwiritsa ntchito zida zomwe zingakwaniritse zolinga zapadera za pulojekiti, mwaluso komanso mwamapangidwe. Izi zikutanthauza kugwiritsa ntchito mapaipi - apa 3.5″ ndi 5″.corten (ASTM A847) machubu achitsulo opangidwa ndi zomangira zomwe zimafunikira zowotcherera kapena zokhotakhota kuti zigwirizane ndi nkhalango zina zolumikizidwa ndi nkhalango zimawonekera. py.
Ed Carpenter, mlengi ndi wojambula okhazikika m'makhazikitsidwe akuluakulu a anthu, adanena kuti anali ndi zolinga zingapo pamene adatenga mlatho. Pakati pawo, mlathowu uyenera kuphatikizidwa muzochitika za nkhalango, zomwe ndi kupitiriza kwa kumverera ndi zochitika za njirayo, ndipo ziyenera kukhala zofewa komanso zowonekera momwe zingathere.
Carpenter, yemwenso ndi wokonda kunja, anati: “Chifukwa chakuti chimodzi mwa zolinga zanga zofunika kwambiri zopanga mlathowo chinali chakuti mlathowo ukhale wosalimba komanso woonekera bwino, ndinafunika zipangizo zolimba kwambiri ndiponso zomangira zaluso kwambiri..Kuyenda panjira ya njanji ya Portland kwa zaka zoposa 40.” Mungaipange pogwiritsa ntchito zipangizo zina, koma mipope yachitsulo kapena mipope ndiyo kusankha kwanzeru.
Malinga ndi ntchito yomanga, kukwaniritsa zonsezi sikophweka. Stuart Finney, katswiri wa zomangamanga ku Portland ofesi ya zomangamanga KPFF komanso yemwe kale anali woyang'anira ntchito ya mlatho, adanena kuti kuwotcherera mbali zonse pa mphambano ya TYK kumene mapaipi onse amakumana mwina kunali kovuta kwambiri. Mbali imodzi ya khama lonse. gulu la zomangamanga.
Finney, amene wakhala akuchita ntchitoyi kwa zaka 20, anati: “Choonadi, mfundo zonse n’zosiyana.” Iwo anafunika kukonza mfundo zonse kuti mapaipi onsewa alumikizike pamfundo imodzi, kuti azitha kumawotcherera pozungulira mapaipiwo.
Barbara Walker Crossing mlatho wa anthu oyenda pansi umadutsa mumsewu wa Burnside womwe uli ndi anthu ambiri ku Portland. Udakhalapo mu Okutobala 2019.
"Ma welds ayenera kusinthidwa kwathunthu.Kuwotcherera kukhoza kukhala chimodzi mwazinthu zovuta kwambiri popanga zinthu.”
Dzina la Ferry, Barbara Walker (1935-2014), wakhala gawo lalikulu la ntchito zoteteza ku Portland kwa zaka zambiri, ndipo ndi wamphamvu pang'ono pachilengedwe. Trail ndi Bridge.
Monga momwe Walker adapezera ndalama zokwana $500,000 kuchokera kwa anthu ku Pioneer Courthouse Square ($ 15 pamwala woyalidwa), bungwe lopanda phindu la Portland Parks Foundation lidapeza $2.2 miliyoni kuchokera ku zopereka zapadera za 900 kuti zithandizire kulipira mlathowu.
Carpenter adati kuphatikiza mawu ndi mawu ambiri pantchitoyo kunali kovuta, koma ndikofunikira.
"Ndikuganiza kuti chofunikira kwambiri ndi mgwirizano waukulu wa anthu ammudzi, kunyada kwakukulu, komanso kuchitapo kanthu kwakukulu - anthu akulipira," adatero Carpenter.Ndi ntchito yaikulu yogwirizana.”
Finney anawonjezera kuti iye ndi gulu lake, ndi opanga omwe ali ndi udindo wopangitsa mapangidwewo kukhala amoyo, adayenera kuthana ndi zovuta zambiri muzojambula za 3D zomwe adachita, chifukwa cha zovuta zonse zamagulu ndi zolumikizira.
"Tikugwira ntchito ndi osindikiza athu kuti tiwonetsetse kuti mitundu yonse ili pamzere chifukwa kachiwiri, palibe malo olakwika ndi ambiri mwa olowa chifukwa cha zovuta za geometry," adatero Finney." Ndizovuta kwambiri kuposa zambiri.Milatho yambiri ndi yowongoka, ngakhale yokhotakhota imakhala ndi zokhotakhota, ndipo zida zake ndizosavuta.
"Chifukwa chake, pali zovuta zambiri zomwe zimabwera mu polojekitiyi.Ndinganene kuti ndizovuta kwambiri kuposa [projekiti] yokhazikika.Pamafunika ntchito yaikulu kuti aliyense akwaniritse ntchitoyi.”
Komabe, malinga ndi kunena kwa Carpenter, pakati pa zinthu zofunika kwambiri pa kucholoŵana kwa mlathowo, chimene chimapangitsa kuti mlathowo ukhale ndi zotsatira zake zonse ndicho denga lopindika.
Ndikuganiza kuti kupanga zinthu mwanzeru nthawi zambiri kumayamba ndi kuchita zinthu mwanzeru kenako n’kupita kuzinthu zina,” anatero Carpenter.” Izi n’zimene zinachitikadi pamlathowu.Ndikuganiza kwa ine, chinthu chofunikira kwambiri ndi sitima yopindika.Pankhaniyi, sindimamva bwino za maswiti chifukwa njira yonseyo ndi yopindika komanso yopindika.Sindikufuna kukhotera chakumanzere kudutsa mlatho kenako ndikukhotera chakumanzere ndikupitilirabe.
Mlatho wodutsa wa Barbara Walker Crossing unangopangidwa kuchokera pamalopo, ndipo unagawika m'magawo awiri akulu, kenako adanyamulidwa kupita komwe uli pano.Portland Parks Foundation.
"Mumapanga bwanji deki yopindika?Chabwino, zikuwoneka, zowona, truss yamitundu itatu imagwira ntchito bwino pamapindikira.Mumapeza chiŵerengero chabwino kwambiri cha kuya ndi kutalika.Kotero, mungachite chiyani ndi truss yamitundu itatu kuti ikhale yokongola komanso Yokongola, ndikulozera ku nkhalango m'njira yomwe imapangitsa kuti izi ziwoneke ngati sizingakhale kwina kulikonse?Yambani ndi kuchitapo kanthu, kenako sunthirani - mawuwo ndi chiyani?— ku zongopeka.Kapena kuchokera ku zinthu zothandiza kupita ku kulingalira .Anthu ena angachite mwanjira ina, koma umo ndi mmene ndimagwirira ntchito.”
Kapentala makamaka amayamikira antchito a KPFF chifukwa chomupatsa chilimbikitso chomwe anafunikira kuti ajambule mapaipi kupyola bwalo la sitimayo, zomwe zinapatsa mlatho kumveka bwino kuchokera kunkhalango.
"Ndi zabwino kukhala ndi china chake chopatsa mzinda uno ndikunyadira nacho, komanso zabwino kuthana ndi zovuta zaukadaulo," adatero Finney.
Malinga ndi bungwe la Portland Parks Foundation, anthu pafupifupi 80,000 oyenda pansi adzagwiritsa ntchito mlathowu chaka chilichonse, kupulumutsa vuto lodutsa gawo la msewu womwe umawona magalimoto pafupifupi 20,000 patsiku.
Masiku ano, mlathowu ukupitiriza masomphenya a Walker ogwirizanitsa anthu okhala ku Portland ndi alendo ku kukongola kwa chilengedwe chozungulira.
“Tiyenera kupatsa anthu a m’tauni mwayi wopeza chilengedwe,” Walker (wotchulidwa ndi World Forestry Center) ananenapo.” Chisangalalo chokhudza chilengedwe chimabwera chifukwa chokhala panja.Sizingaphunziridwe mwachidule.Podzionera okha chilengedwe, anthu ali ndi chikhumbo chofuna kukhala oyang'anira nthaka."
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