Chifukwa Chake Machubu Opangira Zitsulo Amapambana Milu ya Konkire Poyesa Kulemera

Ponena za mayeso a kukula kwa maziko, milu ya konkire yachikhalidwe nthawi zambiri imavutika ndi kusinthasintha komanso kulimba. M'zaka zaposachedwa, chubu chokulungiraMayankho akhala njira ina yabwino kwambiri pamalo omanga.chubu chachitsulondi akatswirichubu cha muluZogulitsa nthawi zonse zimapereka magwiridwe antchito okhazikika komanso onyamula katundu, zomwe zimapangitsa kuti zikhale zosavuta kuposa milu ya konkire yachikhalidwe m'mayeso osiyanasiyana aukadaulo.

Kugwira bwino ntchito kwa machubu okulungira zitsulo kumachokera ku ukadaulo wawo wopangidwa bwino. Kulungira kwa arc kumakhala njira yayikulu yopangira machubu okulungira ozungulira. Kudzera mu ukadaulo wolungira kutentha kwambiri, thupi la chubu limapanga kapangidwe kogwirizana komanso kolimba kwambiri. Bokosi lopangidwa bwinoli limapewa ming'alu ndi kusinthika pansi pa katundu wolemera, kuonetsetsa kuti machubu amatha kugwira ntchito bwino nthawi yayitali pansi pa nthaka komanso m'malo ovuta omanga.

Poyerekeza ndi milu ya konkriti yomwe imatha kusweka mosavuta komanso kukana kupanikizika, machubu oikira zitsulo amakhala ndi mawonekedwekulimba kwakukulu, mphamvu yonyamula katundu wamphamvundikulimba bwinoKapangidwe kawo kolimba kolumikizidwa kumabweretsanso kukana dzimbiri komanso kukhazikika kwa ntchito, zomwe zimapangitsa kuti zikhale zoyenera kwambiri pakupanga maziko, kuyala mapaipi ndi ntchito zina zolemera.

Ubwino wa malonda odalirika umachokera kwa opanga akatswiri. Cangzhou Spiral Steel Pipes Group Co., Ltd., yomwe idakhazikitsidwa mu 1993, ndi kampani yotsogola yopanga mapaipi achitsulo chozungulira komanso zokutira mapaipi. Kampaniyi ili ku Cangzhou, Hebei, ndipo ili ndi malo okwana masikweya mita 350,000, ili ndi katundu wa Yuan 680 miliyoni, ndipo imapeza matani 400,000 a mapaipi achitsulo chozungulira pachaka omwe amatuluka ndi Yuan 1.8 biliyoni.