Nau'in gada mai wucewa ta kogin 321, wanda kuma aka sani da gadar karfe da aka riga aka kera, gada ce ta karfen karfe da ake amfani da ita a duniya. Yana da halaye na tsari mai sauƙi, sufuri mai dacewa, ƙananan sassa, nauyi mai sauƙi, ƙananan farashi, ginawa mai sauri, sauƙin rarrabawa, maimaita amfani da shi, babban ƙarfin ɗaukar nauyi, babban tsattsauran tsari, tsawon gajiya da sauransu. Ana iya haɗa nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan amfani daban-daban na gada na wucin gadi, Gada na gaggawa da ƙayyadaddun gada bisa ga fage daban-daban da ake buƙata ta aikace-aikace.
AsalinBailey BridgeInjiniyoyin Burtaniya ne suka tsara shi a farkon yakin duniya na biyu a shekara ta 1938. A lokacin yakin duniya na biyu, an yi amfani da gadar tagulla na soja sosai. Bayan yakin, kasashe da yawa sun canza gadar karfen Bailey zuwa ga farar hula bayan wasu gyare-gyare. A baya, gadar Bailey karfe ta taka rawar da ba za ta iya maye gurbinsa ba wajen kafa hanyoyin zirga-zirga da magance ambaliyar ruwa.
A kasar Sin, an gina manyan gadajen karfe da aka kera da su sosai kuma an kammala su don amfani da su a shekarar 1965. A yau, ban da kasancewar gadar karfe don shirye-shiryen yaki, kogin 321 na giciye.Bailey Bridgean yi amfani da shi sosai wajen ceto da agajin bala'i. Injiniyan sadarwa, injiniyan kiyaye ruwa na birni, ƙarfafa gada mai haɗari da sauransu. Misali, a lokacin girgizar kasa mai lamba 5.12 a cikin 2008, akwai adadi mai yawa na gadar Bailey ta giciye 321 don ceto da agajin bala'i, kuma 321 na Bailey Bridges na giciye sun taka muhimmiyar rawa wajen jigilar kayan agaji na girgizar kasa, fitarwa. na wadanda suka jikkata da kwashe jama'a.
Lokacin aikawa: Juni-19-2023