Makullan Lagrange da Sake Gina Dam, Sake buɗewa|2020-11-10

Ma'aikatan AECOM Shimmick suna da kwanaki 90 don sake gina Lagrange Locks da ɗakin kulle dam ɗin. A cikin makonnin karshe na sake gina makullai da madatsar ruwan Lagrange, an yi amfani da jiragen ruwan crane guda biyu wajen zuba siminti. A cikin 1939, Rundunar Sojojin Amurka na Injiniyoyi' Lagrange Locks da Dam da aka kammala a kan kogin Illinois kusa da Beardsville, Illinois, a arewacin inda Illinois ta hadu da Kogin Mississippi. Yana da mahimmin hanyar jigilar kayayyaki zuwa duk wuraren kudu. na Babban Mud. Bayan shekaru 81 na sabis, tare da ƙananan gyare-gyare a cikin 1986 da 1988, lokacin da AECOM Shimmick ya fara gyaran dala miliyan 117 a bara, makullin ƙafa 600 da madatsar ruwa ya ƙare. "LaGrange Major Rehab/Major Maintenance shine kwangilar gine-gine mafi girma guda daya da Gundumar Rock Island ta aiwatar," in ji Col. Steven Sattiger, Kwamandan Gundumar Rock Island na USACE da Injiniyan Gundumar. "A cikin shekaru 20 da suka wuce, aikin Rock Island daya ne kawai ya wuce. girman aikin Lagrange, amma an raba aikin zuwa kwangiloli da yawa kuma ya ɗauki kusan shekaru 10 ana aiwatar da shi, wanda ya bambanta da aikin Lagrange. Ba kamar aikin Grange ba, aikin Lagrange yana gamawa ne a lokacin gini guda ɗaya." Ambaliyar ruwa akai-akai da matsanancin yanayin zafi da yawan amfani da su yana haifar da mummunar lalacewar simintin kulle da rage yawan aiki da amincin tsarin injiniya da lantarki. Makullin har ma girma ciyawa a cikin tsohuwar siminti. Shimmick na AECOM shimmick an danka masa nauyin cire ruwan makullin, cire fuskarsa ta kulle, sanya sabbin fanfunan da aka riga aka kera da kuma sake gina fuskar kulle tare da rukunonin sulke na sulke don dorewa. "Yadda aka kafa Corps, zai zama aiki mai wuyar gaske," in ji darektan ayyukan Bob Wheeler, wanda kuma ya yi aiki a kan Olmsted Locks and Dam. ayyukan gine-gine a kusa da makullai, wadanda za su iya kawo cikas ga zirga-zirgar kogin Yana da matukar wahala a yi abubuwa haka. Aikin 90 na kulle-kulle da aikin magudanar ruwa ya fara a watan Yuli, amma AECOM Shimmick ya kamata ya yi ƙulli da yawa a cikin aikin na shekaru biyu. Ambaliyar ruwa a cikin bazara da lokacin rani na 2019 yana nufin Wheeler da tawagarsa suna buƙatar matsawa ayyukan aiki a cikin raguwa guda ɗaya. Tagar rufewa na kwanaki 90 daga Yuli zuwa Oktoba 2020. A cikin irin wannan tagar mai tauri, Wheeler ya ce ya san zai zama "matukar wuya." Ƙungiyar AECOM Shimmick ta buƙaci shigar da sababbin maƙallan maƙallan ƙofar miter da sabon tsarin sarrafawa don buɗewa da rufe ƙofar miter.Saboda ambaliya a wurin, Corps ya so ya maye gurbin na'ura mai kwakwalwa na gargajiya tare da sababbin fasaha. "Lokacin da suka shiga karkashin ruwa, [hydraulic cylinders] yakan zubar da ruwa, kuma hakan zai zama matsala," in ji Wheeler. "Batun farashi ne da kulawa." Maimakon na'urar hawan ruwa, sabon injin ɗagawa yana amfani da injin rotary actuator tare da fasahar dunƙulewa, wanda ba a taɓa amfani da shi ba a cikin makullai a Amurka. Rundunar Marine Corps ta karɓi wannan fasaha don kulle kan jiragen ruwa waɗanda ke amfani da igiya don buɗewa da rufe ƙyanƙyashe da torpedo bays. . Mai yin aikin rotary Moog yana ba da cikakkun umarnin shigarwa.Don mai kunnawa yayi aiki yadda yakamata, aiwatarwa yana buƙatar zama daidai. "Suna ɗaukar sarari da yawa fiye da silinda na gargajiya," in ji Wheeler. "Lokacin da muka auna shinge da splines inda aka ɗora injin rotary, dole ne ya kasance a cikin kashi dubu na inch - asali a cikin makullai da madatsun ruwa kamar wannan, Idan yana cikin kashi takwas na inch, kuna da kyau. "Kayan aiki masu nauyi a cikin ƙaramin sawun kulle kogin sun haɗa da crane mai nauyin ton 300 a gefen ƙasa, crane mai nauyin ton 300 a sama da 300-ton crane a ƙasa. na babban kanti da kullewa.Kwani mai nauyin ton 150 yana kan wani jirgin ruwa a wajen bangon kogin, kuma cranes guda biyu mai nauyin tan 60 suna cikin dakin.Akwai katanga mai nauyin ton 130 da crane mai nauyin tan 60 a bangon kasa. Ana amfani da waɗannan cranes don sanya saƙon sarƙoƙi da kuma sabon siminti don bangon kulle, kuma ana sanya cranes ta amfani da bokiti. Ma'aikatan AECOM Shimmick sun rubuta sa'o'i 200,000 a cikin watanni uku da rabi. A kololuwa, haɗin gwiwar kayan aiki mai nauyi da sadarwa sun haɗa da ma'aikatan 286 da ke aiki na tsawon sa'o'i 10 na sau biyu a cikin 600-foot mai tsayi da 110-fadi dakin kulle. "Muna aiki daga bangarorin biyu na kulle," in ji Wheeler. "Dukansu bangarorin biyu a lokaci guda. Yana da ban mamaki. Muna da babban tsarin tsarawa inda muke tsara duk waɗannan abubuwa a gaba. Yana kama da Lean, amma ya fi mayar da hankali ga tare da ma'aikatan fage da masu sana'a da bayar da ra'ayoyin yau da kullun." Wani dan kwangilar gine-gine na karkashin ruwa JF Brennan daga La Crosse, Wisconsin ya ba da tsare-tsare na ruwa da divers.Wheeler ya ce dole ne su nutse a kan ramummuka masu girma, wanda dole ne a tsaftace su kuma a cire su.Dukkanin bawul ɗin gurɓatawa kuma dole ne a gyara su.Dam ɗin 1939 yana da tsayayyen weir don Dredging da sharewa.Brennan da AECOM Shimmick sun cika shi da kankare don kada ya sake yin aiki kuma ba zai zama abin dogaro ba don jigilar kaya.Tsarin tsaftacewa na zamani an haɗa su da sabon tsarin sarrafawa. "Ba za ku iya zuba kankare a inda akwai wani tsari kamar yadda kuke so ba, sannan ku sanya shi a cikin layin allo guda uku kuma ku gama. Dole ne ya kasance daidai sosai," in ji Wheeler. Mun yanke shi, sa'an nan kuma mu yi rawar jiki kamar ƙafa 6 tare da ginshiƙai, mu sanya tsarin a ciki, mu sanya wannan karamin shaft a ciki kuma mu sanya shi a kan Structurally, sa'an nan kuma sanya rotary actuator a kai. - aikin da kuka saba yi a cikin tashar wutar lantarki, amma a tsakiyar kulle a waje." Duk da kammala dukkan kulle-kulle a cikin kwanaki 90, AECOM Shimmick ya kammala aikin akan lokaci, kuma kogin Illinois ya buɗe don jigilar kaya tun tsakiyar Oktoba. An kammala biyar daga cikin makullai takwas da madatsun ruwa tare da Kogin Illinois.