Umqadi wentsimbi ngumqolo wezakhiwo ezininzi kunye nezakhiwo. Uxhasa ubunzima, ugcina uzinzo, kwaye uqinisekisa ubomi benkonzo ende. Ukukhetha umqadi wentsimbi ofanelekileyo kuchaphazela ukhuseleko, iindleko, kunye nokusebenza kakuhle kolwakhiwo. Ukukhetha okungalunganga kunokukhokelela kwiindleko ezingaphezulu okanye ekusileleni kwesakhiwo. Ngeentlobo ezahlukeneyo zemiqadi, ubungakanani, kunye namanqanaba afumanekayo, ukwenza ukhetho olufanelekileyo kufuna ingqalelo kwiinkcukacha. Iinjineli zihlala zisekela izigqibo kwiimfuno zomthwalo, ubude besithuba, kunye neekhowudi zoyilo.Umqadi wentsimbi olungileyoilinganisela amandla, uqoqosho, kunye nomgangatho.
Qonda Injongo Yomqadi
Ngaphambi kokuba ukhethe umqadi wentsimbi, kufuneka uqonde injongo yawo. Umqadi womgangatho wokuhlala wahlukile koweshedi yemizi-mveliso. Umqadi ngamnye uthwala uhlobo olwahlukileyo lomthwalo—umthwalo ofileyo, umthwalo ophilayo, okanye umthwalo oguqukayo. Umzekelo, umqadi ophahleni lwendlu yokugcina impahla unokuthwala izixhobo eziyi-1,500 kg kunye nomthwalo wekhephu, ngelixa umqadi womgangatho kwiofisi encinci unokuthwala kuphela iikhilogram ezingama-300 ngemitha.
Iinjineli zihlala zihlela imiqadi ngokwemisebenzi yazo: imiqadi yokuqala, yesibini, okanye i-lintel. Imiqadi yokuqala ixhasa eminye imiqadi, ngoko ke ifuna amandla aphezulu. Imiqadi yesibini isasaza imithwalo kweyona miqadi iphambili. Imiqadi ye-lintel ibamba ubunzima ngaphezu kwemingxuma efana neengcango neefestile.
Umzekelo, i-200 mm × 100 mm I-beam ingasebenza kakuhle kububanzi bendawo yokuhlala obuziimitha ezi-6. Nangona kunjalo, icandelo eliziimitha ezingama-400 × 200 lingafuneka kububanzi bemizi-mveliso obuziimitha ezili-12. Ukuqonda lo mahluko kukunceda uphephe uyilo olugqithisileyo okanye uyilo olungaphelelanga.
Kukwabubulumko ukuqwalasela imeko-bume. Imiqadi kwizakhiwo zangaphandle ijongene nokufuma kunye notshintsho lobushushu. Imiqadi yangaphakathi inokufuna ukujongana nokungcangcazela okanye iziqhoboshelo zesilingi. Ukuqonda ngokucacileyo umsebenzi kuqinisekisa ukuba umqadi wakho usebenza kakuhle kulo lonke ixesha lawo lobomi.
Yazi Iintlobo Eziqhelekileyo Zeentsimbi Zensimbi
Inyathelo elilandelayo kukufunda ngeentlobo zemitha. Imiqadi yentsimbi eqhelekileyo iquka imiqadi ye-I, imiqadi ye-H, imiqadi ye-T, kunye nemiqadi yebhokisi. Ngayinye ineempawu zayo ezikhethekileyo.
Ii-I-beams, ezikwabizwa ngokuba zii-universal beams, zine-web emxinwa kunye nee-flanges ezibanzi. Zilula kwaye zifanelekile kwimithwalo ephakathi. I-I-beam ye-200 × 100 × 5.7 mm inokusingatha ngokukhuselekileyo malunga ne-10 kN/m kuxhomekeke kubude be-span.
Ii-H-beams ziqinile kwaye zinzima. Iiflange zazo ezibanzi zinika amandla omthwalo angcono kunye nokumelana nokugoba. I-H-beam ye-300 × 300 × 10 mm inokuthwala i-25 kN/m. Ezi zilungele iibhulorho kunye nezakhiwo zemizi-mveliso ezinzima.
Ii-T-beams zivela ekunqumleni ii-I-beams phakathi. Ziluncedo kwii-short spans nakwiinkqubo zomgangatho.
Iibhokisi zemiqadi okanye iindawo ezingenanto zinemilo evaliweyo ethintela ukugoba. Ziqhelekile kwizakhelo kunye neenqaba zokwakha. Umzekelo, umqadi webhokisi we-200 × 200 × 8 mm unokuxhasa ngaphezulu kwe-15 kN/m ngokuqina okugqwesileyo.
Ukukhetha uhlobo kuxhomekeke kwipateni yakho yomthwalo kunye nendlela yoyilo. Isakhelo sendlu yokugcina impahla sidla ngokusebenzisa ii-H-beams ukuze siqinise, ngelixa indawo encinci yokugcina impahla ingasebenzisa iibhokisi zemiqadi ukuze icoceke.
Kwakhona, jonga ukufumaneka kwendawo kunye neendlela zokwenza izinto. Eminye imimandla isenokuba nobukhulu obulinganiselweyo be-H-beam kodwa i-I-beams eninzi. Ukwazi uhlobo kwangethuba kusindisa ixesha, kuqinisekisa ukulingana okufanelekileyo, kwaye kunciphisa inkunkuma kwimveliso.
Jonga iBanga lezinto kunye namandla azo
Umgangatho wezinto ezibonakalayo yenye into ebalulekileyo. Ichaza ukuba umqadi unokumelana noxinzelelo olungakanani ngaphambi kokuba uguqulwe okanye uqhekeke. Umgangatho oqhelekileyo uquka i-Q235, i-Q345, kunye ne-ASTM A36.
I-Q235 inamandla okuvelisa amalunga ne-235 MPa. Isebenza kwiifreyimu ezilula, njengeevenkile ezincinci okanye ii-mezzanines. I-Q345 okanye i-ASTM A572 Grade 50 inikezela malunga ne-345 MPa, ifanelekile kwizakhiwo ezinzima, iikhreyini, okanye ii-long spans.
Umzekelo, ukuba umqadi uxhasa iitoni ezili-10 ngaphezulu kobubanzi obuziimitha ezi-6, intsimbi ye-Q235 inokufuna icandelo elikhulu (masithi yi-400 × 200 mm). Ngentsimbi ye-Q345, ungasebenzisa umqadi omncinci we-350 × 175 mm. Izinto eziqinileyo zinciphisa ubungakanani bomqadi kunye nobunzima, zinciphisa ukusetyenziswa kwentsimbi iyonke nge-10–15%.
Nangona kunjalo, intsimbi yodidi oluphezulu ibiza ngaphezulu. Umqadi we-Q235 unokubiza i-$600 ngetoni, ngelixa i-Q345 ibiza malunga ne-$700 ngetoni. Soloko ulinganisela iindleko neemfuno zesakhiwo.
Kwakhona, qinisekisa ukubaintsimbi idibanaimigangatho yesizwe. Isatifikethi sovavanyo lwe-mill (MTC) kufuneka sibonise amandla okuvelisa, amandla okutsalwa, kunye nokwakheka kweekhemikhali. Umqadi olungileyo kufuneka uphumelele uvavanyo lwe-ultrasound ukuze kufunyanwe iziphene zangaphakathi.
Kwiprojekthi ezikwiindawo ezifumileyo okanye ezikunxweme, khetha intsimbi egqunywe ngesinyithi okanye egugulekayo. Zimelana nokugqwala kwaye zandisa ubomi bayo ngaphezu kwama-30%. Umgangatho ofanelekileyo uqinisekisa ukhuseleko kunye noqoqosho.
Vavanya ubungakanani bomqadi kunye noBume
Ubungakanani bomqadi kunye nemilo zichaphazela ngokuthe ngqo amandla kunye nokuphambuka. Ukukhetha ubungakanani kuxhomekeke kubude besithuba kunye nomthwalo osetyenzisiweyo. Iinjineli zisebenzisa iifomyula okanye isoftware ukufumana umzuzu ofunekayo we-inertia kunye ne-section modulus.
Njengesikhokelo esilula:
Kwimiqolo engama-4–6 m, sebenzisa imiqadi ye-I enobunzulu obuyi-200–250 mm.
Kwimiqolo eyi-8–10 m, sebenzisa imiqadi enobunzulu obuyi-300–400 mm.
Kwimiqolo engaphezulu kwe-12 m, sebenzisa imiqolo ye-H enzulu okanye imiqolo ye-truss.
Umzekelo, umqadi we-6 m oxhasa i-500 kg/m unokusebenzisa umqadi we-I 200 mm ubunzulu. Ukuba umthwalo ofanayo udlula kwi-12 m, ukuphambuka kuyaphindaphindeka kabini, kwaye unokufuna umqadi we-400 mm ubunzulu.
Soloko ugcina umlinganiselo womqadi ufanelekile. Umlinganiselo wobubanzi nobunzulu beeflanges akufuneki udlule kwi-0.5. Ukuba ubanzi kakhulu, kunokwenzeka ukuba kubekho ukugoba kwendawo.
Kwakhona, jonga imo ukuze ubone iimfuno ezithile. Imiqadi ene-flanges ezinciphileyo igcina izinto ezikwiiphahla ezinde. Imiqadi yebhokisi iyamelana nokugoba kwizakhiwo ezifana nee-gantries okanye ii-tower. Imiqadi egobileyo inokuphucula inkangeleko kuyilo lwezakhiwo.
Uyilo oluhle lwemilo luphucula inkangeleko kunye nokusebenza. Xa ungaqinisekanga, thelekisa ukhetho lwemitha usebenzisa iitafile zecandelo. Abavelisi abaninzi banikezela ngeetshathi ezinomthamo wexesha kunye nobunzima ngemitha nganye.
Ukukhetha ubungakanani obufanelekileyo bomqadi kuthintela iindleko ezingeyomfuneko ngelixa kuqinisekiswa amandla kunye nozinzo.
Cinga ngezinto zokwenza izinto kunye nokufakela
Kwanomqadi oqinileyo unokwaphuka ukuba kunzima ukuwubumba okanye ukuwufaka. Kufuneka uhlale ucinga ngendlela umqadi oza kuveliswa ngayo, uthuthwe kwaye udityaniswe ngayo.
Kwiiworkshop ezincinci, ukuwelda umqadi we-H we-10 m kunokuba nzima. Kwiimeko ezinjalo, uqhagamshelo lwe-splice olunamabholiti lusebenza ngcono. Umqadi we-10 m unokwahlulwa ube ngamacandelo amabini e-5 m kwaye udityaniswe kwindawo. Oku kunciphisa umthwalo we-crane kunye neendleko zokuthutha ngama-20-30%.
Unyango lomphezulu nalo lubalulekile. Imiqadi egalelwe ngesinyithi okanye epeyintiweyo iyamelana nokugqwala kwaye yandisa ubomi benkonzo. Umzekelo, i-epoxy primer inokulibazisa ukugqwala ukuya kuthi ga kwiminyaka eli-15 kwimimandla eselunxwemeni.
Cinga ngokugrumba imingxunya, ukusika iiflange, kunye nokuwelda iipleyiti zokugqibela. Ukwenziwa kakubi kunokwenza buthathaka amandla omthi. Soloko uqinisekisa ukuba imingxunya ibekwe ubuncinci kabini ubukhulu beflange ukusuka kumphetho.
I-engile yokufakelwa kunye nokulungelelaniswa nako kuchaphazela ukusebenza. Umqadi otyeke kancinci unokubangela uxinzelelo olungalinganiyo. Ngexesha lokumiswa, sebenzisa amanqanaba omoya kunye neebholiti ezilawulwa yi-torque.
Okokugqibela, jonga udumo lomthengisi. Umenzi olungileyo ulandela imigangatho ye-ISO 9001 kwaye usebenzisa abawelda abaqinisekisiweyo. Imveliso eqhubekayo iqinisekisa ukuba umqadi ngamnye uhlangabezana nomgangatho ofanayo.
Ukwenziwa nokufakelwa ngokufanelekileyo kuguqula uyilo oluhle lube sisakhiwo esikhuselekileyo. Ukungawunaki lo mgangatho kunokuphelisa iingenelo zentsimbi esemgangathweni ophezulu.
Ukukhetha umqadi wentsimbi olungileyo kufuna okungaphezulu kokuqikelela ngobukhulu okanye ubunzima. Kubandakanya ukuqonda umsebenzi, uhlobo lomqadi, umgangatho wezinto, ubungakanani, kunye nomgangatho wokufakelwa. Ukusebenzisa idatha echanekileyo kunye nokujonga umgangatho kwinqanaba ngalinye kuthintela ukungaphumeleli kwaye kunciphisa iindleko zexesha elide.
Ixesha leposi: Novemba-11-2025