ASTM A252 Qib 2 Piling Piping yog dab tsi
ASTM A252 Qib 2 cov yeeb nkab yog cov yeeb nkab uas tau tsav los yog vibrated rau hauv av kom nqa lub hauv paus loads. Cov yeeb nkab yog tsim los rau ASTM A252 / A252M, feem ntau yog los ntawm cov txheej txheem kauv submerged arc vuam, thiab tau muab los ntawm ob qho tib si los yog beveled xaus kom cov ntu tuaj yeem txuas rau ntawm qhov chaw kom ncav cuag qhov tob tob.
Txoj cai tswjfwm yog kev siv tshuab ntau dua li qhov siab- ntsig txog: qhov tsawg kawg nkaus tawm lub zog ntawm 240 MPa (35,000 psi) thiab lub zog tensile yam tsawg kawg nkaus ntawm 414 MPa (60,000 psi), tau txheeb xyuas los ntawm kev kuaj ntau tensile. Lub hom phiaj tsim yog kom muaj sia nyob rov ua rau muaj kev cuam tshuam ntawm kev tsav tsheb thiab tom qab ntawd nqa compression, khoov thiab qee zaus nro ntawm kev pabcuam lub neej ntawm cov qauv.
Specification Summary
| Yam khoom | Yam ntau yam |
|---|---|
| Txuj | ASTM A252 / A252M, Qib 2 |
| Nominal sab nraud txoj kab uas hla | 219mm txog 3,620mm (8 nyob rau hauv 144 nyob rau hauv) |
| Phab ntsa thickness | Xaiv los ntawm kev tsim load thiab tsav kev ntxhov siab |
| Ntev | Txog 6 m txog 24 m, los yog txiav kom txiav |
| Txoj kev tsim khoom | SSAW, LSAW lossis EFW welded yeeb nkab |
| Xaus | Plain los yog beveled, square txiav |
| Yam tsawg kawg nkaus yield zog | 240 MPa (35,000 psi) |
| Tsawg kawg tensile zog | 414 MPa (60,000 psi) |
| Kev lees txais | Kev ntsuas tensile ntau, ntsuas qhov loj me, kuaj pom qhov vuam |
Vim li cas Kauv Seam Suits Piling Ua Haujlwm
Nyob rau hauv cov txheej txheem kauv ib tug nruam sawb yog pub los ntawm kev sib sau yob uas khoov nws mus rau hauv lub helix, thiab cov npoo yog welded sab hauv thiab sab nraud los ntawm submerged arc vuam. Lub resulting seam khiav nyob ib ncig ntawm lub circumference es tsis raws cov pawg axis, uas muaj ob lub tswv yim.
Cov kab loj loj yog tsim los ntawm cov sawb nqaim, yog li cov ntu hnyav thiab qhov ntev ntev yog yooj yim dua rau kev muab khoom.
Lub helical seam kis tau tsav kev ntxhov siab nyob ib ncig ntawm lub voj voog es tsis txhob tsom nws hauv ib txoj kab ntev.
Qhov twg ib qhov project nyiam cov seam ntev, LSAW yeeb nkab tsim los ntawm cov phaj thiab welded sab hauv thiab sab nraud xa cov khoom siv sib npaug rau tib qib.
Daim ntawv thov
Lub tsev thiab kev lag luam cog cov hauv paus ntawm cov khoom muag muag los yog puv hauv av.
Choj piers, abutments thiab mus kom ze cov qauv.
Wharf, jetty thiab marine structures, feem ntau nrog cov txheej txheem tiv thaiv.
Kev tuav cov phab ntsa, cofferdams thiab kev txhawb nqa ua haujlwm ib ntus.
Transmission ntauwd bases thiab hnub ci lossis cua cog hauv paus.
Kev xaiv, txheej thiab tuav
Phab ntsa thickness yuav tsum tau kho los ntawm pawg tsim, xyuas ob qho tib si geotechnical muaj peev xwm thiab kev tsav tsheb kev ntxhov siab tiv thaiv rauj xaiv. Vim Qib 2 tsis yog qhov tshwj xeeb siab, thickness tsis raug xaiv los ntawm lub sijhawm ua yeeb nkab.
Rau faus lossis marine kev pabcuam, qhia cov txheej txheem sab nraud xws li fusion bonded epoxy, peb txheej polyethylene lossis bituminous system, thiab xav txog kev tiv thaiv corrosion rau lub neej tsim.
Splice welds yuav tsum tau ua rau cov txheej txheem tsim nyog nrog kev npaj bevel kom raug thiab sib dhos.
Nqa pawg nrog cov hlua lossis lub hom phiaj- ua clamps, yeej tsis los ntawm cov yeeb nkab xaus ib leeg.
Khaws cov av kom huv si ntawm cov ntoo txhawb nqa kom cov dej noo thiab cov dej sawv ntsug tsis tawm tsam qhov chaw.
FAQ
Q: Dab tsi qib thiab tus qauv yog ib qho kauv welded piling yeeb nkab tau lees paub rau?
ASTM A252 / A252M Qib 2 yog cov lus hais ntau, nrog rau qib thiab qhov ntev tau hais los ntawm daim ntawv pov thawj zeb ua ke nrog cov txiaj ntsig ntawm kev sim ntau tensile.
Q: A252 Qib 2 yeeb nkab puas tuaj yeem txuas rau ntawm qhov chaw?
Yog lawm. Splices feem ntau yog ua los ntawm cov hlau thaiv arc, flux cored los yog submerged arc vuam siv cov txheej txheem tsim nyog thiab qis - hydrogen consumables.
Q: Puas yog Qib 2 muaj zog txaus rau kev tsim choj?
Nws feem ntau yog, yog qhov seem yog qhov loj me rau qhov tsim load thiab tsav kev ntxhov siab. Qhov twg muaj kev tsav tsheb hnyav, Qib 3 nrog lub zog tawm los ntau dua yuav raug teev tseg.
Q: Dab tsi txheej yog siv rau marine pawg?
Fusion bonded epoxy los yog ntau- txheej txheej polyolefin siv los ntawm kev npaj thiab moj tej tawg huv si yog ib txwm muaj, nrog rau thaj tsam txaws feem ntau muab kev tiv thaiv ntxiv.
Q: Yuav ua li cas pawg yuav khaws cia ua ntej tsav tsheb?
Ntawm cov ntoo qhuav, tshem tawm cov av thiab cov dej sawv ntsug, nrog lub hau kawg los yog npog rau hauv qhov chaw kom tsis txhob muaj dej thiab cov khib nyiab nkag mus rau hauv qhov bore.
Q: Cov ntaub ntawv twg yuav tsum nrog cov khoom xa tuaj?
Daim ntawv pov thawj zeb xeem rau qib thiab cua sov, cov ntaub ntawv tshawb xyuas qhov ntev thiab, qhov twg tau teev tseg, tsis yog -cov ntaub ntawv pov thawj kev puas tsuaj rau cov seam.
