Intshayelelo yenqwaba yeshiti yentsimbi yaseLarsen

Yintoni iInqwaba yeshiti yentsimbi yaseLarsen?
Ngo-1902, injineli yaseJamani egama linguLarsen yaqala ukuvelisa uhlobo lwenqwaba yesinyithi ene-cross-section efana ne-U kunye neetshixo kuzo zombini iziphelo, eyasetyenziswa ngempumelelo kubunjineli, yaza yabizwa ngokuba yi "Inqwaba yeLarsen Sheet"elandela igama lakhe. Kule mihla, iinqwaba zesinyithi zikaLarsen ziye zaziwa kwihlabathi liphela kwaye zisetyenziswa kakhulu ekuxhaseni isiseko semigodi, ubunjineli be-cofferdams, ukhuseleko lwezikhukula kunye nezinye iiprojekthi.

Inqwaba yesinyithi yeLarsen yimigangatho eqhelekileyo yamazwe ngamazwe, uhlobo olufanayo lwenqwaba yesinyithi yeLassen eveliswa kumazwe ahlukeneyo inokuxutywa kwiprojekthi enye. Umgangatho wemveliso yenqwaba yesinyithi yeLarsen ucacise amalungiselelo kunye neemfuno ngobukhulu becandelo elinqamlezileyo, isitayile sokutshixa, ukwakheka kweekhemikhali, iimpawu zoomatshini kunye nemigangatho yokuhlolwa kwezinto, kwaye iimveliso kufuneka zihlolwe ngokungqongqo kumzi-mveliso. Ke ngoko, inqwaba yesinyithi yeLarsen inomgangatho ofanelekileyo wokuqinisekiswa kunye neempawu zoomatshini, kwaye ingasetyenziswa ngokuphindaphindiweyo njengezinto zokutshintsha, ezineengenelo ezingenakutshintshwa ekuqinisekiseni umgangatho wokwakha kunye nokunciphisa iindleko zeprojekthi.

 

Iintlobo zeenqwaba zesinyithi zeLarsen

Ngokweenxalenye ezahlukeneyo zobubanzi, ukuphakama kunye nobukhulu, iinqwaba zesinyithi zeLarsen zinokwahlulwa zibe ziimodeli ezahlukeneyo, kwaye ububanzi obusebenzayo benqwaba enye yeenqwaba zesinyithi ezisetyenziswa rhoqo buneempawu ezintathu, ezizezi: 400mm, 500mm kunye ne-600mm.
Ubude beNqwaba yePhepha leNtsimbi eliThambileyo bunokwenziwa ngokwezifiso kwaye buveliswe ngokweemfuno zeprojekthi, okanye bunokunqunyulwa bube ziimfumba ezimfutshane okanye budityaniswe bube ziimfumba ezinde emva kokuthenga. Xa kungenakwenzeka ukuthutha iimfumba zephepha lentsimbi ezinde ukuya kwindawo yokwakha ngenxa yokunqongophala kwezithuthi neendlela, iimfumba zohlobo olufanayo zinokuthuthwa ziye kwindawo yokwakha zize zidityaniswe kwaye zandiswe.
Izinto zenqwaba yeshiti yentsimbi yaseLarsen
Ngokwendlela ezikhula ngayo izinto, amanqanaba ezinto ezisetyenziswa kwiinqwaba zesinyithi zeLarsen ezihambelana nomgangatho wesizwe yi-Q295P, Q355P, Q390P, Q420P, Q460P, njl., kwaye ezo zihambelana nomgangatho waseJapan zezo.SY295, I-SY390, njl. Iindidi ezahlukeneyo zezinto, ukongeza kwiikhemikhali zazo, zinokudityaniswa kwaye zolulwe. Iindidi ezahlukeneyo zezinto ukongeza kwiikhemikhali ezahlukeneyo, iiparameter zayo zoomatshini nazo zahlukile.

Iiklasi zezinto zepali zensimbi zaseLarsen ezisetyenziswa rhoqo kunye neeparameter zoomatshini

Umgangatho	Izinto eziphathekayo	Uxinzelelo lwemveliso N/mm²	Amandla okuxinana N/mm²	Ukwandiswa %	Umsebenzi wokufunxa impembelelo J(0℃)
I-JIS A 5523 (I-JIS A 5528)	SY295	≥295	≥490	≥17	≥43
	I-SY390	≥390	≥540	≥15	≥43
GB/T 20933	Q295P	≥295	≥390	≥23	——
	Q390P	≥390	≥490	≥20	——