Nkhani - N’chifukwa chiyani milu ya mapepala achitsulo imagwiritsidwa ntchito kwambiri?

Pamene mizinda padziko lonse lapansi ikuthamangira kukonza zomangamanga zakale ndikumanga malo atsopano okhala m'mizinda,milu ya mapepala achitsuloZakhala ngati njira yosinthira zinthu—ndi liwiro lawo lokhazikitsa mwachangu lomwe lakhala lofunika kwambiri pakukhazikitsa, kuthandiza makontrakitala kuchepetsa nthawi yogwirira ntchito pakati pa nthawi yomanga mizinda.

mulu wa pepala lachitsulo chogwiritsidwa ntchito chogulitsidwa

Deta ya makampani ochokera ku Global Steel Construction Association (GSCA) ikuwonetsa kuwonjezeka kwa 22% chaka ndi chaka.mulu wa pepalaKugwiritsa ntchito mapulojekiti a m'mizinda mu 2024, kuphatikizapo kukulitsa sitima zapansi panthaka, kukonzanso malo otsetsereka m'mphepete mwa nyanja, ndi ntchito yokumba mozama maziko atali. Mosiyana ndi nyumba zachikhalidwe zosungira konkriti zomwe zimafuna milungu ingapo yokonza,milu yachitsulo yamakono—nthawi zambiri yokonzedwa kuti ikwaniritse miyeso yeniyeni ya polojekiti—imatha kuponyedwa pansi pa liwiro la mamita 15 mpaka 20 patsiku, zomwe zimachepetsa nthawi yomanga pamalopo ndi 30% pa avareji.

kukula kwa khoma la mulu wa pepala wamba

"Kumanga mizinda sikudikira—kuchedwa kumatanthauza ndalama zambiri komanso kusokoneza anthu okhala m'mizinda," anatero Maria Hernandez, mainjiniya wamkulu wa zomangamanga ku kampani yomanga ya ku Madrid yotchedwa EuroBuild. "Pa pulojekiti yathu yaposachedwa yokulitsa metro ku Barcelona, kusintha kupita ku interlockingmilu ya mapepala achitsulo otentha opindidwapa makoma otetezera ngalande omwe achotsedwa masiku 12 kuchokera pamene mukukumba. Zimenezi n'zofunika kwambiri pamene mukugwira ntchito m'madera odzaza anthu omwe ali ndi mwayi wochepa wolowera.

mulu wa pepala lachitsulo lopangidwa ndi ozizira

Kukopa kwamilu ya mapepala a uZimapitirira liwiro. Zophimba zawo zosagwira dzimbiri (monga galvanization yotenthedwa kapena mankhwala a polima) zimapangitsa kuti zikhale zolimba kuti zigwiritsidwe ntchito kwa nthawi yayitali, pomwe kapangidwe kake ka modular kamalola kuti zichotsedwe mosavuta ndikugwiritsidwanso ntchito m'mapulojekiti amtsogolo—zogwirizana ndi zolinga zapadziko lonse lapansi zokhazikika m'mizinda. Mwachitsanzo, pakukonzanso kwa Marina Bay ku Singapore, milu ya mapepala yomwe idayikidwa mu 2023 kuti ikhazikitse malo obwezeretsedwanso idzagwiritsidwanso ntchito pa projekiti yapafupi yoteteza gombe mu 2025, kuchepetsa zinyalala za zinthu ndi 40%.

milu ya mapepala achitsulo otentha opindidwa

Akatswiri okonza mizinda akuonanso ubwino wa magalimoto ndi njira zopezera anthu. Ku Toronto, pulojekiti yowonjezera misewu kotala lapitayi idagwiritsa ntchito milu ya mapepala kumanga makoma osakhalitsa m'dera logwirira ntchito. "Popeza kukhazikitsa kudatha m'masiku atatu okha, tinapewa kutsekedwa kwathunthu kwa misewu nthawi yomwe anthu ambiri amagwira ntchito - chinthu chomwe sichikanatheka ndi makoma a konkriti," adatero wolankhulira Dipatimenti Yoyendetsa Magalimoto ku Toronto James Liu.

Opanga akuyankha kufunikira komwe kukukulirakulira mwa kupanga zinthu zatsopano. Kumayambiriro kwa mwezi uno, wopanga zitsulo waku Netherlands, ArcelorMittal, adayambitsa mtundu watsopano wopepuka wa sheet mulu womwe umasunga mphamvu zambiri koma ndi wosavuta kunyamula ndikuyika ndi 15%, cholinga chake ndi mapulojekiti apakatikati a m'mizinda komwe makina olemera ndi ochepa.

Akatswiri amakampani akulosera kuti izi zichitika mofulumira mu 2025, ndipo kugwiritsa ntchito milu ya mapepala kukuyembekezeka kukula ndi 18% pamene mizinda ku Asia ndi Africa ikuwonjezera ndalama zogwirira ntchito zomangamanga. "Kukula kwa mizinda sikukuchepa, ndipo makontrakitala akufunika mayankho omwe amagwirizanitsa liwiro, chitetezo, ndi kukhazikika," adatero katswiri wa zomangamanga wa GSCA, Raj Patel. "Milu ya mapepala imafufuza mabokosi onsewa—ndipo ntchito yawo pakupanga zomangamanga zabwino za mizinda ikukula."