Nā Laka Lagrange a me ke kūkulu hou ʻana i ka pā, wehe hou ʻia|2020-11-10

Ua loaʻa i nā limahana AECOM Shimmick he 90 mau lā no ke kūkulu hou ʻana i nā Laka Lagrange a me ke keʻena laka hoʻoheheʻe wai o ka wai. I loko o nā pule hope loa o ke kūkulu hou ʻana i nā laka a me ka pā o Lagrange, ua hoʻohana ʻia ʻelua mau moku crane no ka ninini ʻana i ke kaʻa. I ka makahiki 1939, ua hoʻopau ʻia ka US Army Corps of Engineers 'Lagrange Locks and Dam ma ke kahawai ʻo Illinois kokoke i Beardsville, Illinois, aia ma ka ʻākau o kahi e hui ai ʻo Illinois me ka muliwai Mississippi. o ka lepo nui. Ma hope o 81 mau makahiki o ka lawelawe ʻana, me ka hoʻoponopono liʻiliʻi wale nō i ka makahiki 1986 a me 1988, i ka wā i hoʻomaka ai ʻo AECOM Shimmick i kahi $ 117 miliona hoʻihoʻi i ka makahiki i hala, ua pau ka laka a me ka dam 600-foot. "ʻO LaGrange Major Rehab/Major Maintenance ka ʻaelike hana hoʻokahi nui loa i hana ʻia e ka moku ʻo Rock Island," wahi a Col. Steven Sattiger, USACE Rock Island District Commander a me District Engineer. ka nui o ka papahana Lagrange, akā ua hoʻokaʻawale ʻia kēlā papahana i nā ʻaelike he nui a lawe ʻia ma kahi o 10 mau makahiki e hoʻokō ai, he ʻokoʻa ia me ka papahana Lagrange. ʻAʻole like me ka papahana Grange, ua hoʻopau maoli ʻia ka papahana Lagrange i hoʻokahi manawa kūkulu. ʻO ke kahe pinepine ʻana a me nā wela wela a me nā uku hoʻohana kiʻekiʻe e alakaʻi i ka pōʻino nui o ka paʻa paʻa a hoʻemi i ka hana a me ka hilinaʻi o nā ʻōnaehana mechanical a me nā uila. Ua hana ʻia ka AECOM Shimmick me ka hoʻomaʻemaʻe ʻana i ka laka, ka wehe ʻana i kona alo laka, ka hoʻokomo ʻana i nā panela hou i hana mua ʻia a kūkulu hou i ka maka laka me nā panela pale kaua i hoʻopaʻa ʻia no ka lōʻihi. "ʻO ke ʻano o ka hoʻokumu ʻia ʻana o ka Corps, he hana paʻakikī loa ia," wahi a ka luna o ka papahana ʻo Bob Wheeler, nāna i hana ma ka Olmsted Locks and Dam. ʻO nā hana kūkulu a puni nā laka, hiki ke hoʻopilikia i ke kahe o ka muliwai. Ua hoʻomaka ka 90-lā lockout a me ka hana hoʻoheheʻe wai i Iulai, akā ua manaʻo ʻia ʻo AECOM Shimmick e hana i nā laka he nui i loko o ka papahana ʻelua makahiki. ʻO ka puka makani pani o 90 mau lā mai Iulai a ʻOkakopa 2020. Ma kahi puka aniani paʻa, ua ʻōlelo ʻo Wheeler ua ʻike ʻo ia he "paʻakikī loa." Pono ka hui AECOM Shimmick e hoʻokomo i nā wahi heleuma puka miter hou a me kahi ʻōnaehana mana programmable hou e wehe a pani i ka puka miter. "Ke hele lākou i lalo o ka wai, [hydraulic cylinders] e lele, a he pilikia ia," wahi a Wheeler. Ma kahi o nā cylinders hydraulic, hoʻohana ka mīkini hoʻokiʻekiʻe hou i ka mea hoʻokele rotary me ka ʻenehana spindle, ʻaʻole i hoʻohana mua ʻia i nā laka ma ʻAmelika Hui Pū ʻIa. . Hāʻawi ka mea hana Rotary actuator Moog i nā ʻōlelo kuhikuhi kikoʻī. "He ʻoi aku ka liʻiliʻi o lākou ma mua o nā cylinders kuʻuna," wahi a Wheeler. "Ke ana mākou i ke kumu a me nā splines kahi i kau ʻia ai ka mea hoʻokele rotary, pono ia i loko o hoʻokahi kaukani ʻīniha - ma nā laka a me nā pā e like me kēia. inā i loko o ka ʻewalu o ka ʻīniha, ua maikaʻi ʻoe " ʻO nā mea hana kaumaha i loko o nā kapuaʻi paʻa o ka laka o ka muliwai a me ka puʻu me kahi crane 300-ton ma ka ʻāina, kahi crane 300-ton i uka a me kahi crane 300-ton downstream. ʻO ka pahu nui a me ka laka. Aia kahi crane 150-ton ma kahi moku ma waho o ka paia o ka muliwai, a ʻelua mau pahu 60-ton i loko o ka hale. Hoʻohana ʻia kēia mau cranes e kau i ke kaulahao leka a me ke kaʻa hou no nā paia laka, a hoʻokomo ʻia nā pahu me ka hoʻohana ʻana i nā bākeke. Ua hoʻopaʻa nā limahana AECOM Shimmick i nā hola 200,000 i loko o ʻekolu mahina a me ka hapa. Ma ka piko, ʻo ka hoʻonohonoho ʻana i nā mea hana kaumaha a me nā kamaʻilio pū ʻana me nā limahana 286 e hana ana i nā hoʻololi pālua ʻeono 10-hola i loko o kahi lumi laka 600-kapuaʻi a me 110-kapuaʻi. "Ke hana nei mākou mai nā ʻaoʻao ʻelua o ka laka," wahi a Wheeler. "ʻO nā ʻaoʻao ʻelua i ka manawa hoʻokahi. He mea kupanaha. He ʻōnaehana hoʻolālā maikaʻi kā mākou e hoʻolālā ai i kēia mau mea āpau i mua. Ua like ia me Lean, akā ʻoi aku ka nānā ʻana e pili ana i nā limahana a me nā limahana hana a me ka hāʻawi ʻana i nā manaʻo i kēlā me kēia lā." Ua hāʻawi ʻo JF Brennan subcontractor i ka hana ʻana ma lalo o ka wai mai La Crosse, Wisconsin i nā hoʻolālā moana a me nā mea ʻokoʻa. ʻO ka dredging a me ka hoʻomaʻemaʻe. Ua hoʻopiha ʻo Brennan a me AECOM Shimmick iā ia me ka ʻuala i ʻole ia e hana hou a ʻaʻole e hoʻopiʻi ʻia no ka hoʻouna. "ʻAʻole hiki iā ʻoe ke ninini i ke kaʻa ma kahi o kahi formwork e like me kāu e hana maʻamau ai, a laila kau i loko o ʻekolu laina pale a hoʻopau. Pono ia e pololei loa, "wahi a Wheeler." ʻOki mākou i waho, a laila ʻeli mākou ma kahi o 6 kapuaʻi me nā heleuma, hoʻokomo i ka hale i loko, a hoʻokomo i kēia kumu liʻiliʻi a hoʻopaʻa ʻia i ka Structurally, a laila kau i ka mea hana rotary ma luna o ia mea. - ka hana maʻamau āu e hana ai i loko o ka hale mana, akā ma ka waena o ka laka ma waho." ʻOiai ua hoʻopau ʻia nā laka a pau i loko o kahi manawa 90-lā, ua hoʻopau ʻo AECOM Shimmick i ka papahana i ka manawa, a ua wehe ʻia ka muliwai ʻo Illinois no nā moku moku mai ka waena o ʻOkakopa.