Vim li cas cov nqi kim dua yog "kev lag luam"?
Nyob rau hauv engineering tej yaam num, tshwj xeeb tshaj yog nyob rau hauv kev tsim kho ntawm cov dej hauv nroog thiab kev txuag dej sib txuas, feem ntau cov kev txiav txim siab - cov neeg tsim khoom instinctively xaiv tus neeg muag khoom nrog tus nqi qis tshaj, ntseeg qhov no yog txoj hauv kev ncaj qha tshaj plaws los tswj cov nqi. Txawm li cas los xij, qhov kev xav no tsis quav ntsej txog qhov ntev - lub sijhawm ntawm cov haujlwm engineering thiab tsis xav txog tag nrho cov nqi ntawm lub neej ntawm qhov project. Rau cov kav hlau hlau, qhov zoo li qhov pib nqis peev tau ua tiav qhov zoo tshaj plaws ntawm tag nrho cov nqi los ntawm kev txo qhov ntev -cov nqi zais xws li kev teeb tsa, tu, thiab hloov.
Cov kav hlau kav hlau yog qhov tseeb kim dua li cov kav dej ua los ntawm lwm cov ntaub ntawv,Feem ntau yog vim lawv cov txheej txheem tsim khoom tshwj xeeb thiab cov nqi raw khoom.Cov kav hlau kav hlau feem ntau yog tsim los rau alifespan tshaj 50 xyoo,thaum qee cov kav dej pheej yig dua tuaj yeem ntsib kev ua haujlwm tsis zoo lossis yuav tsum tau hloov pauv hauv 10-20 xyoo. Qhov no txhais tau hais tias kev siv cov kav dej pheej yig dua thoob plaws ib txoj haujlwm lub neej yuav koom nrog 2-3 lossis ntau dua "excavation-replacement-backfilling" cycles. Txhua qhov kev hloov pauv tsis tsuas yog yuav tsum tau rov nqis peev hauv cov khoom siv yeeb nkab nws tus kheej tab sis kuj cuam tshuam kev tsim kho thiab kev sib raug zoo ntau zaus ntawm tus nqi ntawm cov yeeb nkab nws tus kheej.
Cov kav hlau kav hlau txuas ua ke cov rigidity ntawm hlau nrog lub toughness ntawm steel,muab cov kev tiv thaiv zoo tshaj plaws rau siab, khoov, thiab kev cuam tshuam piv rau ntau lwm cov khoom siv yeeb nkab.Qhov no ua rau ob qho txiaj ntsig zoo: ua ntej, lawv tsis tshua muaj kev puas tsuaj thaum lub sijhawm thauj mus los thiab kev teeb tsa, txo qis kev tsim kho; Qhov thib ob, lawv muaj peev xwm tiv taus cov kev cuam tshuam sab nraud xws li kev sib haum xeeb hauv paus, kev hloov hauv av, thiab txawm tias av qeeg me me. Qhov no inherent kev ntseeg tau ncaj qha txhais rau hauvmuaj zog tsis kamkom siab - cov xwm txheej muaj kev pheej hmoo xws li cov yeeb nkab tawg thiab xau, tiv thaiv kev lag luam loj thiab lub koob npe nrov los ntawm kev sib tsoo ntawm cov kav dej.
Cov kav dej hlau siv ob sab hauv thiab sab nraud los tiv thaiv -corrosion system ntawm"metallic zinc txau + asphalt xim txheej txheej". Nyob ntawmntawm cov dej tsis zoo, los tiv thaiv- cov kab xeb xws li silicate cement, aluminate cement, polyurethane, thiab epoxy resin tuaj yeem muab kom paub daws teeb meem nrog acid thiab alkaline av thiab dej yaig.
Cov kav hlau kav siv cov kav dej uas paub tab T- hom swb- hauv kev sib koom ua ke, enabling ceev installation thiab muab zoo heev sealing. Qhov no tsis tsuas yog txhim kho kev tsim kho kom zoo thiab ua kom lub sijhawm siv sijhawm luv, tab sis kuj tshem tawm cov xau zais los ntawm cov pob qij txha tsis zoo ntawm qhov chaw.
Tus nqi siab dua ntawm cov kav hlau hlau yog vim muaj cov khoom siv txhim kho (lub zog, toughness, thiab corrosion kuj).Cov khoom no ncaj qha txhais rau kev txuag nqi nyob rau hauv peb qhov tseem ceeb: txhim kho kev txhim kho kev ua haujlwm, txo txij nkawm zaus, thiab ncua kev ua neej ntev. Cov nyiaj khaws cia no deb tshaj qhov sib txawv ntawm tus nqi pib yuav khoom. Nyob rau hauv lub realm ntawm pipelines, ib tug tseem ceeb kev nqis peev rau cov nroog,Kev txuag nqi tiag tiag yog los ntawm kev txheeb xyuas tus nqi zoo thoob plaws hauv lub neej tag nrho, ua tiav ntev - kev txuag nyiaj thiab kev thaj yeeb ntawm lub siab.
Ductile hlau yeeb nkab network khoom thiab muab kev pab cuam:
Raws li qib siab - zoo ductile hlau yeeb nkab hom, Jintai Hongye boasts cov khoom zoo, nruj txheej txheem ntau lawm, thiab lub koob npe nrov ua lag luam,muab koj cov khoom siv txhim khu kev qha thiab tom qab - kev muag khoom.
Cov khoom zoo thiab tus nqi tswj xyuas kom muaj kev ntseeg siab tau.
Tag nrho cov khoom lag luam kev tswj xyuas lub neej muaj kev qhia dav tom qab - kev muag khoom.
Muaj ntau txoj kev thauj mus los: freight, hiav txwv freight, thiab rail freight.