chiyambi cha mankhwala
Steel box girder imapangidwa ndi mbale yapamwamba, mbale yapansi, ukonde, magawo odutsa ndi zolimba zotalika komanso zopingasa. Mawonekedwe ake ophatikizika omwe amagwiritsidwa ntchito kwambiri amaphatikiza chipinda chimodzi, chipinda chimodzi, chipinda chachitatu, chipinda chachiwiri, chipinda chimodzi chokhala ndi bokosi limodzi, chipinda chokhalamo, Multi-box single-chamber, trapezoid inverted with inclined webs, single-box multi-chamber yokhala ndi zambiri kuposa 3 webs, flat steel box girder, etc. Pakati pawo, gawo lachitsulo lomwe limagwiritsidwa ntchito kwambiri ndi bokosi lachiwiri la chipinda chimodzi, ndipo chipinda chokhalamo chokhala ndi mabokosi ambiri chimagwiritsidwa ntchito pa milatho yokhala ndi mlatho waukulu. Flat steel box girder ali ndi chiŵerengero chaching'ono cha kutalika kwa mtengo mpaka kutalika kwa mtengo, ndipo amagwiritsidwa ntchito makamaka pazitsulo zokhala ndi nthiti monga milatho yoyimitsidwa, milatho yokhala ndi chingwe, ndi milatho ya arch. Simagwiritsidwa ntchito kawirikawiri m'milatho yamitengo. Single-box multi-chamber steel box girder yokhala ndi ma webs opitilira 3 sizovuta kupanga ndikuyika, chifukwa chake imagwiritsidwa ntchito kawirikawiri.
Ubwino wa mankhwala
(1) Kulemera kochepa komanso kusunga zinthu. Milatho yazitsulo zamabokosi achitsulo imatha kupereka kusewera kwathunthu ku mphamvu yonyamula katundu yachitsulo, kupulumutsa pafupifupi 20% yazinthu zachitsulo poyerekeza ndi milatho yachitsulo yokhala ndi nthawi yomweyo. Pambuyo pa mapangidwe apamwamba akukhala opepuka, mtengo wa gawo lapansi udzachepetsedwanso.
(2) Kupindika ndi torsion kukhazikika kwakukulu. Chitsulo cha bokosi lachitsulo chimatenga gawo lotsekedwa, lomwe lingapereke kugwedezeka kwakukulu ndi kugwedezeka kwa torsion kusiyana ndi mitundu ina yodutsa pansi pa khalidwe lomwelo. Ndizoyenera makamaka milatho yokhotakhota ndi milatho yowongoka yamabokosi achitsulo yomwe imakhala ndi katundu wokulirapo.
(3) Kukhazikitsa mwachangu komanso kukonza kosavuta. Chitsulo cha bokosi lachitsulo chikhoza kupangidwa kukhala gawo lalikulu mu fakitale kuti muchepetse ntchito yolumikizana ndi malo ndikuonetsetsa kuti unsembe ndi kulondola kwa unsembe. Chipindacho ndi chotsekeka chokhala ndi mawonekedwe osavuta, omwe ndi abwino kupenta, anti-corrosion ndi dzimbiri kukana, ndipo kenako kukonza pamanja.
(4) Kuthandizira kukonza bwino kwa erection. Ndikupita patsogolo kwa zida zazikulu zokwezera komanso ukadaulo wowongolera, girder yamabokosi ndi yoyenera kukweza kapena kuthamangitsa magawo akulu, zomwe zimapindulitsa kupititsa patsogolo luso la erection ndikufupikitsa nthawi yomanga.
Ntchito zamalonda
Chifukwa cha mawonekedwe ake, chotchinga chachitsulo chimagwiritsidwa ntchito ngati chotchingira chachitsulo chokwera komanso chokwera; yomanga nthawi magalimoto gulu yaitali chingwe anakhala mlatho, kuyimitsidwa mlatho, Chipilala mlatho stiffening girder ndi oyenda mlatho zitsulo bokosi girder.
