Hauv kev tsim kho niaj hnub no, cov hlau rebar yog ib qho tseem ceeb heev, ua lub luag haujlwm tseem ceeb hauv txhua yam los ntawm cov skyscrapers siab mus rau cov kev nkhaus. Nws cov yam ntxwv tshwj xeeb ua rau nws yog ib qho tseem ceeb hauv kev ua kom lub tsev muaj kev nyab xeeb thiab ruaj khov.
Rebar, lub npe nrov rau cov hlau ribbed kub-kub, tau txais nws lub npe los ntawm qhov chaw ribbed. Nws qhov seem feem ntau yog voj voog, nrog ob lub ribs longitudinal thiab cov ribs transverse sib nrug sib npaug raws nws qhov ntev. Cov ribs transverse yog crescent-puab thiab tsis sib tshuam nrog cov ribs longitudinal. Cov qauv nto tshwj xeeb no tsis yog tsuas yog ua kom muaj zog ntawm cov rebar thiab cov pob zeb xwb tab sis kuj ua rau nws lub zog tensile thiab kev ruaj khov tag nrho hauv cov qauv tsev. Rebar feem ntau yog ua los ntawm cov hlau carbon lossis cov hlau low-alloy thiab muaj ntau txoj kab uas hla, txij li 6 hli txog 50 hli, kom haum rau ntau yam kev xav tau ntawm lub tsev.
Cov hlau rebar muaj cov khoom siv kho tshuab zoo dua, siv tag nrho cov khoom siv kho tshuab ntawm cov hlau thaum lub sijhawm nruj, ua rau nws zoo dua li cov hlau rebar ib txwm muaj. Nws qhov chaw raug kho kom ua ib txheej oxide tuab, uas ua rau muaj kev tiv thaiv corrosion thiab ntev nws lub neej kev pabcuam. Nws kuj tseem tuaj yeem txiav tau yooj yim mus rau qhov ntev xav tau los ntawm kev siv tshuab, ua rau kev ua haujlwm tsim kho yooj yim.
Cov hlau rebar raug faib ua ntau txoj kev. Raws li tus qauv Suav (GB1499), cov hlau rebar raug muab faib ua peb qib raws li lub zog (qhov taw qhia/lub zog tensile): HRB335, nrog lub zog ntawm 335 MPa, tsim nyog rau cov qauv tsev dav dav; HRB400, nrog lub zog ntawm 400 MPa, tsim nyog rau cov qauv uas nqa cov khoom hnyav dua; thiab HRB500, nrog lub zog ntawm 500 MPa, muab lub zog tensile thiab torsional siab heev, tsim nyog rau cov haujlwm engineering tshwj xeeb. Cov hlau rebar tuaj yeem muab faib ua cov qib kub dov thiab txias dov raws li nws txoj kev tsim khoom. Cov hlau rebar kub dov yog tsim los ntawm cov ntawv hlau uas tsis tu ncua lossis thawj zaug dov, muab cov txiaj ntsig xws li lub zog siab, ductility zoo, thiab lo rau cov pob zeb ua vaj tse zoo heev. Cov hlau rebar txias dov, ntawm qhov tod tes, yog tsim los ntawm cov kauj kub dov, pickled kom tshem tawm cov nplai, thiab tom qab ntawd txias dov. Nws kuj qhia txog lub zog siab, ductility zoo, thiab lub zog sib txuas nrog cov pob zeb ua vaj tse. Los ntawm daim ntawv thov, nws tuaj yeem muab faib ua cov hlau rebar rau cov pob zeb reinforced thiab cov hlau rebar kho cua sov rau cov pob zeb prestressed.
Cov hlau rebar siv rau ntau yam kev tsim kho thiab kev tsim kho vaj tse. Hauv cov qauv tsev, nws feem ntau siv los txhawb thiab txuas cov beams, kem, slabs, thiab lwm yam khoom hauv cov qauv pob zeb reinforced, txhim kho lawv qhov ruaj khov thiab lub peev xwm thauj khoom. Hauv kev tsim kho vaj tse, nws ua haujlwm ua cov khoom siv txhawb nqa thiab txuas hauv cov choj, qhov av, thiab txoj kev loj, txhim kho lawv qhov ruaj khov thiab tiv taus av qeeg. Hauv kev tsim kho tsheb ciav hlau, nws yog siv los ruaj ntseg thiab txuas cov rails, xyuas kom meej tias kev ua haujlwm du. Hauv kev khawb av, nws feem ntau siv los ua cov khoom siv txhawb nqa thiab txhawb nqa, txhawb nqa cov ru tsev thiab phab ntsa hauv av. Nws txawm siv rau hauv kev kho kom zoo nkauj hauv tsev los tsim cov khoom dai xws li cov tes tuav, cov ntaiv, thiab cov ntaiv, sib txuas cov kev zoo nkauj nrog kev ruaj khov.
Kev tsim cov hlau rebar yuav tsum tau ua kom muaj kev sib txuas ntawm txhua txoj kev. Cov txheej txheem feem ntau muab faib ua kev ua hlau, kev ua hlau tseem ceeb, thiab kev ua tiav. Cov thev naus laus zis tseem ceeb ntawm kev tsim khoom suav nrog kev kho cua sov tom qab dov, kev tsim cov hlau zoo, kev txiav thiab dov, thiab kev dov tsis muaj qhov.
Cov hlau rebar kuj tseem muaj txoj haujlwm tseem ceeb hauv kev ua lag luam. Nws ua haujlwm ua lub cim qhia tseem ceeb ntawm kev txhim kho kev lag luam tsim kho, thiab nws cov nqi hloov pauv muaj kev cuam tshuam ncaj qha rau cov tuam txhab upstream thiab downstream hauv cov saw hlau kev lag luam hlau. Rau cov neeg tsim khoom hlau, cov nqi rebar nce siab txhais tau tias cov nyiaj tau los siab dua; rau cov tuam txhab tsim kho downstream thiab cov neeg tsim kho vaj tse, cov nqi hloov pauv ncaj qha cuam tshuam rau cov nqi tsim kho. Xyoo 2023, kuv lub teb chaws cov nqi rebar hloov pauv ntawm 3,600 thiab 4,500 yuan / ton, nce mus txog nruab nrab Lub Peb Hlis. Txij thaum kawg Lub Peb Hlis mus txog thaum kawg Lub Tsib Hlis, cov ntaub ntawv vaj tse tsis tau raws li kev cia siab ntawm kev ua lag luam. Ua ke nrog kev poob qis ntawm cov nqi thee hauv tsev tom qab kev txo qis ntawm kev kub ntxhov hluav taws xob txawv teb chaws, cov nqi rebar poob qis sai. Thaum Lub Kaum Ib Hlis, ntau txoj cai, suav nrog cov uas cuam tshuam nrog trillion-yuan tsoomfwv cov nyiaj cog lus thiab vaj tse, tau txhawb nqa kev xav ntawm kev ua lag luam thiab ua rau muaj kev rov qab los ntawm cov nqi rebar. Lub caij no, huab cua zoo hauv kev ua lag luam sab qab teb tau ua rau muaj qee qhov kev ua haujlwm maj, tab sis kev thov tag nrho tseem muaj zog. Thaum Lub Kaum Ob Hlis, vim yog tus nqi khoom siv raw nce siab thiab cov cai macroeconomic, tus nqi rebar tau hloov pauv ib puag ncig 4,100 yuan / ton, nce mus txog 4,090.3 yuan / ton rau Lub Kaum Ob Hlis 29th.
Cov hlau rebar, lub hauv paus ruaj khov rau cov haujlwm tsim kho, ci ntsa iab thoob plaws ntau qhov chaw ua tsaug rau nws cov yam ntxwv tshwj xeeb, cuam tshuam rau kev txhim kho ntawm kev lag luam tsim kho. Nws yuav txuas ntxiv mus nrog kev nce qib ntawm thev naus laus zis thiab kev txhim kho kev lag luam.
Lub sijhawm tshaj tawm: Lub Yim Hli-18-2025