ASTM A252 Steel Yeeb Nkab rau Piles
ASTM A252 yog tus qauv tshwj xeeb uas tsim los tswj cov kav hlau los yog seamless steel siv rau piling thiab cov ntawv zoo sib xws. Cov txheej txheem no muab cov ncauj lus kom ntxaws txog qhov ntev, cov duab, qhov hnyav, cov kev xav tau, cov qauv kev sim, thiab cov cai tshuaj xyuas ntawm cov kav hlau steel kom paub meej tias lawv qhov zoo thiab kev ua tau zoo raws li cov kev xav tau tshwj xeeb engineering.
Hlau Chemical Composition
Cov hlau yuav tsum ua raws li cov cai hauv qab no raws li cov tshuaj muaj pes tsawg leeg:
Phosphorus, siab tshaj (%): 0.050
Mechanical Properties
|
STEEL Qib |
Yield zog, min. psi (MPa) |
Tensil zog, min. psi (MPa) |
Elongation hauv 2 hauv., min. % |
|
|
QIB 1 |
30,000 (205) |
50,000 (345) |
30% |
|
|
QIB 2 |
35,000 (240) |
60,000 (415) |
25% |
|
|
QIB 3 |
45,000 (310) |
66,000 (455) |
20% |
|
Yuav tsum tau xeem
Tshuaj ntsuam xyuas, Mechanical Test, Visusal Inspection, Tension Test, Dimension Check
astm a252 sib
Tsis muaj ib qho ncaj qha sib npaug rau ASTM A252, vim nws yog tus qauv rau cov yeeb nkab steel thiab muaj qhov sib npaug sib txawv nyob ntawm cov kev xav tau tshwj xeeb. Txawm li cas los xij, lwm yam qauv zoo li ASTM A50o (rau cov qauv tubing) thiab API 5L (rau cov kav raj xa dej) qee zaum muab piv, txawm tias lawv siv rau ntau lub hom phiaj. Lwm cov qauv thoob ntiaj teb muaj xws li EN 10210 thiab EN 10219.
A252 steel kav (feem ntau xa mus rau cov kav hlau uas ua raws li ASTM A252 tus qauv) feem ntau yog siv rau cov hom phiaj hauv qab no:
Kev tsim kho Foundation Engineering
- High-Rise Buildings: Hauv cov nroog niaj hnub no, cov tsev siab - nce siab tau tshwm sim tas li, nqa qhov hnyav hnyav thiab muaj cua daj cua dub thiab seismic loads. A252 steel kav, siv los ua pawg hauv paus, tuaj yeem nkag mus tob rau hauv qhov chaw ruaj khov hauv av, muab lub hauv paus ruaj khov rau lub tsev. Piv txwv li, nyob rau hauv ib co super siab- nce vaj tse nyob rau hauv ntug dej hiav txwv nroog, vim complex geological tej yam kev mob thiab tuab txheej ntawm cov av mos, siv A252 steel yeeb nkab piles yuav hloov lub tsev lub load mus tob, nyuaj av los yog pob zeb txheej, ua kom lub tsev ruaj ntseg thiab ruaj ntseg.
- Loj Commercial Complexes: Cov tsev no feem ntau loj hauv cov nplai thiab cov qauv tsim, yuav tsum muaj siab heev - cov hauv paus zoo. A252 steel yeeb nkab pawg muaj peev xwm zoo heev thiab lub zog compressive, ua tau raws li lub hauv paus kev muaj peev xwm ntawm cov lag luam loj. Piv txwv li, nyob rau hauv loj -tej kev lag luam tej yaam num integrating khw malls, chaw ua hauj lwm cov tsev, thiab tsev so, kev siv ntawm A252 steel yeeb nkab pawg tuaj yeem tiv thaiv kev sib haum xeeb ntawm cov tsev tsis sib xws thiab xyuas kom lawv siv tau zoo.
Bridge Engineering
- Txoj Kev Loj: Cov choj loj loj yuav tsum tiv taus cov tsheb thauj khoom, lawv tus kheej qhov hnyav, thiab kev cuam tshuam ntawm ib puag ncig ntuj. A252 steel yeeb nkab pawg tuaj yeem ua lub hauv paus qauv ntawm cov txuas hniav, muab kev txhawb nqa ruaj khov rau cov piers thiab abutments. Nyob rau hauv kev tsim kho ntawm ib co kev loj choj hla tus dej ntws, vim yog complex geological tej yam kev mob ntawm cov dej cheeb tsam, kev siv ntawm A252 steel yeeb nkab pawg yuav hloov mus rau txawv geological tej yam kev mob, kom lub stability thiab durability ntawm tus choj.
- Railway Choj: Cov choj hla kev tsheb ciav hlau tseem muaj kev txwv nruj dua rau lub hauv paus kev ruaj ntseg thiab kev tswj hwm kev sib haum xeeb vim tias muaj kev kub ceev thiab hnyav ntawm cov tsheb ciav hlau. Lub zog siab thiab zoo rigidity ntawm A252 steel yeeb nkab pawg tuaj yeem ua tau raws li cov kev cai ntawm kev tsheb ciav hlau txuas hniav, ua kom muaj kev nyab xeeb ntawm cov tsheb ciav hlau. Piv txwv li, nyob rau hauv kev tsim kho ntawm railway choj nyob rau hauv lub roob roob, qhov twg geological tej yam kev mob muaj ntau yam, kev siv cov A252 steel yeeb nkab piles tuaj yeem daws tau qhov teeb meem ntawm lub hauv paus tsis sib xws.
Chaw nres nkoj thiab Dock Engineering
- Cov chaw nres nkoj: Cov chaw nres nkoj yog qhov tseem ceeb rau kev thauj khoom thauj thiab thauj khoom thiab nkoj thauj khoom, xav tau kev tiv thaiv nkoj, thauj khoom thauj, thiab dej hiav txwv yaig. A252 steel yeeb nkab pawg muaj kev cuam tshuam zoo heev thiab kev tiv thaiv corrosion (nrog rau kev tiv thaiv tsim nyog - kev tiv thaiv corrosion), muab kev txhawb nqa txhim khu kev qha rau cov qauv chaw nres nkoj xws li wharves thiab breakwaters. Hauv kev tsim kho cov chaw nres nkoj loj, A252 steel yeeb nkab piles tau siv dav hauv wharf foundation engineering kom muaj kev ruaj ntseg thiab kev nyab xeeb ntawm cov chaw nres nkoj.
- Wharves: Wharves tuaj nyob rau hauv ntau yam qauv, xws li lub ntiajteb txawj nqus wharves thiab siab -pile wharves. A252 steel yeeb nkab pawg yog dav siv nyob rau hauv siab - pawg wharves. Lawv tuaj yeem npaj tau raws li qhov xav tau ntawm lub nkoj thauj khoom thiab geological tej yam kev mob, muab lub hauv paus ruaj khov rau lub wharf lub superstructure thiab ua kom muaj kev ua haujlwm ntawm lub nkoj thiab kev nyab xeeb ntawm cov khoom thauj thiab thauj khoom.
Lwm yam Engineering Fields
- Kev Tsim Kho Hauv Nroog: Hauv qee qhov kev tsim kho hauv nroog hauv nroog, xws li cov chaw hauv av thiab chaw nres tsheb hauv av, thaum geological tej yam kev mob tsis zoo, A252 steel yeeb nkab piles tuaj yeem ua haujlwm ib ntus lossis ruaj khov kev txhawb nqa cov qauv kom muaj kev nyab xeeb thiab kev siv ntawm qhov project.
- Cov nroj tsuag muaj kev lag luam: Rau qee cov nroj tsuag loj, tshwj xeeb tshaj yog cov uas yuav tsum tau tiv taus cov khoom siv loj lossis cov khoom hnyav, A252 steel yeeb nkab pawg tuaj yeem muab lub hauv paus ruaj khov, ua kom ruaj khov ntawm cov qauv cog thiab kev ua haujlwm ntawm cov khoom siv.
