Kwiminyaka yakutshanje, kunye nenkxaso eqinile yelizwe kwizakhiwo ezenziwe ngaphambili, amacandelo ekhonkrithi e-precast abe yinto ebalulekileyo ekuphuhlisweni kwezakhiwo ezenziwe ngaphambili.UHebei XIndadi ugxininise kuphando kunye nophuhliso "lokusetyenziswa kwamandla aphantsi, uhlaza, ubugcisa bokuvelisa obukrelekrele kunye nezixhobo zekhonkrithi esele yenziwe" iminyaka eyi-18, ibambelele kwingqikelelo yophuhliso lobuchule bobugcisa, kwaye iye yaphuhlisa ngokuzimeleyo izizukulwana ezithathu zemigca yemveliso ekrelekrele. iiphaneli ezidityanisiweyo ezine-prestressed.

Umgca wemveliso ikakhulu ubandakanya ukucocwa kwetafile yokubumba, ukuphawula, ukutshiza ioyile, ukubumba ecaleni kunye nokufakwa komngundo wesahlulelo, ufakelo lokomeleza, ufakelo lwenxalenye edibeneyo, i-prestressing, i-vibration yelaphu kunye nokudibanisa, ukugqitywa kwecandelo, ukugquma ifilimu kunye nokunyanga, ukususwa komngundo, ukusika ukuqinisa ukuqinisa. , kunye nokuphakanyiswa kwecandelo.Amacandelo agqityiweyo anokuchaneka okuphezulu kunye nokuzinza kwesakhiwo kunye neemveliso ezikumgangatho ophezulu kumacandelo okwakhiwa kwangaphambili.