Isimo Samanje Sokuthuthukiswa Kwensimbi Enomumo Ofana No-H
Esimweni esishintsha njalo sobunjiniyela bamabhuloho, ushintsho olukhulu luyaqhubeka ngokusetshenziswa okusha kweAmaphrofayili e-H-beamOnjiniyela namaqembu okwakha kulo lonke imboni manje basebenzisa izakhiwo ezihlukile zeUkukhanya kwe-Hamaphrofayili, ahlanganiswe nomklamo olula othuthukisiwe, ukuze kuthuthukiswe kakhulu amandla okuthwala umthwalo wamabhuloho—okuphawula inkathi entsha yokusebenza kahle, ukuphepha, kanye nokusimama ekuthuthukisweni kwengqalasizinda.
Isingeniso kanye nezinzuzo zensimbi enomumo we-H
Amaphrofayili e-H-beam, aziwa nge-cross-section yawo ehlukile enomumo we-"H", aqashelwa isikhathi eside ngokusebenza kwawo okuhle kakhulu kwemishini.amaphrofayili ensimbi yendabukonjengemisebe ye-I, imisebe ye-H inezingqimba eziphezulu nezingezansi ezihambisanayo ezixhunywe yiwebhu ejiyile, okuholela ekusabalalisweni kwamandla okulinganiselayo. Le nzuzo yesakhiwo ivumela imisebe ye-H ukuthi imelane nokugoba kanye nokugoba ngempumelelo, okwenza ibe ukukhetha okuhle kwezingxenye ezithwala umthwalo kumaphrojekthi ebhuloho. Kodwa-ke, ukuhlanganiswa kwezimiso zokuklama ezilula okuvule amandla azo aphelele eminyakeni yamuva.
“Sekungamashumi eminyaka onjiniyela bamabhuloho bebhekene nokushintshana: ukuze bathuthukise umthamo wokuthwala umthwalo, besivame ukudinga ukwandisa isisindo kanye nomthamo wensimbi esetshenzisiwe, okwakhulisa izindleko zokwakha, kwandise isikhathi sephrojekthi, futhi kwanezela ingcindezi ezakhiweni zesisekelo,” kuchaza uDkt. Elena Carter, unjiniyela omkhulu wezakhiwo e-Global Infrastructure Innovations (GII), inkampani ehamba phambili ekuklanyweni nasekukhiqizweni kwamabhuloho. “Ngephrofayili ye-H-beam kanye nomklamo olula, siwuqedile lowo mehluko. Ngokwenza ngcono ubukhulu be-H-beams—ukunciphisa izinto ezingadingekile ezindaweni ezingezona ezibalulekile ngenkathi siqinisa izindawo ezicindezela kakhulu—sidale izakhiwo ezilula kodwa ezikwazi kakhulu ukusingatha imithwalo esindayo.”
Yiziphi izinzuzo zomklamo olula wensimbi enomumo we-H?
“Umklamo olula we-H-beams awuzange nje uthuthukise umthamo womthwalo; ushintshe yonke inqubo yokwakha,” kusho uMark Torres, umphathi wephrojekthi yeWest River Crossing Bridge. “Izingxenye ezilula zazisho ukuthi singasebenzisa ama-crane amancane, sinciphise inani lohambo lokuhamba ngezinto zokwakha, futhi sisheshise ukuhlanganiswa endaweni. Lo msebenzi waqedwa amasonto amathathu ngaphambi kwesikhathi esibekiwe, futhi songe cishe amaRandi ayizigidi eziyi-1.5 ezindlekweni zokwakha. Emiphakathini yendawo, lokhu kusho ukufinyelela kusenesikhathi endleleni yokuhamba ephephile nethembekile.”
Ngale kwezindleko kanye nokuzuza kokusebenza kahle, ukusetshenziswa okusha kwamaphrofayili e-H-beam kubunjiniyela bebhuloho nakho kunegalelo emigomweni yokusimama. Ngokunciphisa ukusetshenziswa kwensimbi, amaphrojekthi afana ne-West River Crossing Bridge anciphisa ukukhishwa kwekhabhoni okuhlobene nokukhiqizwa kwensimbi—isici esibalulekile emizamweni yomhlaba wonke yokunciphisa ukuguquka kwesimo sezulu. Ngaphezu kwalokho, umklamo olula unciphisa umthelela wemvelo wezisekelo zebhuloho, njengoba kudingeka ukumba okuncane kanye nokhonkolo ukuze kusekelwe isakhiwo, kuncishiswe ukuphazamiseka kwezindawo zemvelo zasendaweni.
Intuthuko yesikhathi esizayo yensimbi enomumo we-H
Ochwepheshe bezimboni babikezela ukuthi lo mkhuba uzoqhubeka nokukhula njengoba amaphrojekthi engqalasizinda emhlabeni wonke ebeka phambili ukuqina kanye nokusimama. I-International Association of Bridge and Structural Engineers (IABSE) isanda kukhipha umbiko ophawula ukuthiAmaphrofayili e-H-beam anomklamo olulakulindeleke ukuthi zisetshenziswe kumaphrojekthi amabhuloho aphakathi kuya kwamakhulu angu-45% ngo-2028, kusukela ku-15% kuphela ngo-2020.
“Amabhuloho ayinsika yamanethiwekhi ezokuthutha, futhi ukusebenza kwawo kuthinta ngqo umnotho kanye nokuphila kwansuku zonke,” kusho uDkt. Carter. “Ukusetshenziswa okusha kwamaphrofayili e-H-beam akuyona nje intuthuko yezobuchwepheshe—kuyisisombululo esibhekana nezinselele ezicindezela kakhulu embonini: ukuphepha, ukusebenza kahle, kanye nokusimama. Njengoba siqhubeka nokuthuthukisa amasu okuklama alula futhi sithuthukisa izinto ze-H-beam ezinamandla aphezulu, sizokwazi ukwakha amabhuloho ahlakaniphile, ahlala isikhathi eside, futhi afaneleka kangcono ukuhlangabezana nezidingo zezizukulwane ezizayo.”
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Isikhathi sokuthunyelwe: Septhemba-02-2025