Northwest Boring Co. Inc. (NWB) yaku Woodinville, Washington, idapangidwa ndi Shoreline Construction kuti ilowe m'malo mwadzidzidzi ya City of Mill Creek yomwe idalephera 36-in.mapaipi amiyala amadzi amkuntho omwe adachititsa kusefukira kwamadzi m'dera lakunja kwatawuni, kumpoto kwa Seattle.
Kufunika kokonzanso madzi amkuntho kudawonekera pomwe sinkhole idawoneka mu Disembala 2017, pakati pa Sweetwater Ranch ndi madera a Douglas Fir.Ntchito yokonza kwakanthaŵi inachitidwa, koma dzenje linanso linapangidwa pamalo omwewo patangotha mwezi umodzi.Pambuyo poyang'anira, zidatsimikiziridwa kuti kulephera kwa coupler ndi kuwonongeka kwa 36-in.chitoliro chinali chiyambi chake.Chifukwa City of Mill Creek idalengeza kuti ntchitoyi ndi yadzidzidzi yokhala ndi ndalama zosakwana $300,000, kuyitanitsa anthu ambiri sikunafunikire.Shoreline Construction idasankhidwa kukhala kontrakitala, zomwe zidapangitsa kuti ntchitoyo ikhale yosasunthika ku NWB.
Mayendedwe omwe adakonzedwa kuti alowe m'malo adayikidwa mkati mwa kanyumba kakang'ono pakati pa nyumba ziwiri pakuya kwa 11-ft pamalo ovuta.Pokhala ndi malo ocheperako, kuzama kwa kukhazikitsa ndi momwe zinthu zilili, NWB idadziwa kuti njira yake yotopetsa ya Akkerman ingakhale njira yabwino yokhazikitsira madzi amvula yamkuntho.
NWB inagwiritsa ntchito Akkerman GBM 4800 Series Jacking Frame yokhala ndi chomata cholumikizira cholumikizira cha torque yayikulu kuti chikhale chotopetsa.Kuphatikizikako kunapangitsa kuti kukhazikike ma chubu oyendetsa ndi magawo 10-mapaipi okhala ndi torque ndi mphamvu yamagetsi yamakina otopetsa koma mkati mwa shaft yaying'ono.Mapangidwewa adagwiritsa ntchito shaft imodzi kuti ayambitse kuthamanga kuchokera mbali zonse ziwiri zomwe zidachepetsanso kusokoneza kwa malo okhala komanso kupulumutsa ndalama za polojekiti.
Pansi pa nthaka panali madzi oundana oundana ndi miyala, yomwe ili mmenemo kuderali.Malowa sangasinthidwe ndi chiwongolero cha chubu chokhazikika kotero NWB inakonza zogwiritsa ntchito zida zapadera mpaka 12,000 psi UCS ground.Kubowola kosankha, Rock Drill Adapter yokhala ndi TriHawk drill bit, idatsogolera machubu oyendetsa omwe adakhazikitsa masinthidwe a 140- ndi 110-lf pamzere wofunikira ndi giredi ya mphamvu yokoka.Panthawi imodzimodziyo, dothi loyenera lopaka mafuta linagwiritsidwa ntchito kuti lichotse zodulidwa zofukulidwa kuti zibwerere ku shaft yotsegulira kuti zichotsedwe.
Magulu akukonzekera kutsogolera jack 110- ndi 140-lf, 36-in.chitsulo chosungira.Kusadakhale kosungirako, NWB idakhazikitsa ndodo yowongolera yokhala ndi ma 36-in.cutterhead yomwe idafanana ndi 36-in.diameter ya casing.Chigawo chozungulira cha chidacho chinayamwa kasinthasintha wa auger pomwe chodulacho, chokhala ndi zida zodulira za carbide gage cutter bit, chinakumba malo ovuta.Kudutsa kwachiwiri kumeneku kunamalizidwa ndi ndodo yolondolera yozungulira yokhala ndi mutu wa zigawo zonse zamadzi amkuntho.
Makonzedwewo adamalizidwa ndi 27-in.Chitoliro chonyamulira cha Vylon chomwe chili mkati mwa chosungiracho chisanalumikizidwe kuzinthu zomwe zilipo kale.Kuyambira pachiyambi mpaka kumapeto ntchito yonseyo idamalizidwa patangotha mwezi umodzi, ndikuthetsa vuto la City munthawi yake ndikusokoneza pang'ono kwa nzika.
Nthawi yotumiza: Nov-04-2019