Insimbi Eyakheke Ngokukhethekile Ekhandwa Ngamakhaza
Ngenxa yobuchwepheshe kanye nobunye bokusetshenziswa kwayo, insimbi emise okukhethekile ivame ukuba nezidingo eziphakeme zokunemba kunensimbi yesigaba esilula, enezidingo eziphakeme emandleni emishini. Ngenxa yomumo wayo oyinkimbinkimbi wesigaba esiphambanayo, ikakhulukazi insimbi emise okukhethekile ngezikhathi eziningi ezithile, kukhona okuhlangenwe nakho okuncane ongakufunda kukho, okwenza ukuklanywa kwephasi nokukhiqizwa kube nzima kunensimbi elula ye-cross-section. Ngakho-ke, izindleko zokukhiqiza zensimbi emise okukhethekile ziphakeme kunaleyo yensimbi yesigaba esilula. Ngenxa yomehluko omkhulu wokuma nosayizi wensimbi emise okukhethekile, eziningi zazo zinikezelwe embonini ethile noma izikhathi ezithile, ngakho-ke isidingo semakethe sohlobo olulodwa ngokuvamile asisikhulu kakhulu. Ngakho-ke, isikali sesistimu yokukhiqiza insimbi emise okukhethekile ngokuvamile asisikhulu kakhulu.
Insimbi emise okukhethekile iyisifinyezo sensimbi yesigaba esiyinkimbinkimbi nesikhethekile, esiyingxenye yensimbi yesigaba, futhi ihlukile egameni lensimbi yesigaba esilula. Ngokwezinqubo ezihlukene, ingahlukaniswa ibe insimbi emise okukhethekile egoqelwe eshisayo, edonswe ngokubanda (edonsa ngokubanda) emise okwesipesheli, insimbi eyakhiwe ngendlela ebandayo eyakheke ngendlela ekhethekile, eshiselwe insimbi emise okukhethekile, njll. insimbi emise okwensimbi isho insimbi egoqelwe ngendlela ekhethekile. Insimbi enomumo okhethekile ogoqelwe oshisayo iyinsimbi egoqelwe eshisayo ehlukanisa insimbi eyisikwele, insimbi eyindilinga, insimbi eyisicaba kanye nezimo ezivamile.
Ngenxa yobuchwepheshe kanye nobunye bokusetshenziswa kwayo, insimbi emise okukhethekile ivame ukuba nezidingo eziphakeme zokunemba kunensimbi yesigaba esilula, enezidingo eziphakeme emandleni emishini. Ngenxa yomumo wayo oyinkimbinkimbi wesigaba esiphambanayo, ikakhulukazi insimbi emise okukhethekile ngezikhathi eziningi ezithile, kukhona okuhlangenwe nakho okuncane ongakufunda kukho, okwenza ukuklanywa kwephasi nokukhiqizwa kube nzima kunensimbi elula ye-cross-section. Ngakho-ke, izindleko zokukhiqiza zensimbi emise okukhethekile ziphakeme kunaleyo yensimbi yesigaba esilula. Ngenxa yomehluko omkhulu wokuma nosayizi wensimbi emise okukhethekile, eziningi zazo zinikezelwe embonini ethile noma izikhathi ezithile, ngakho-ke isidingo semakethe sohlobo olulodwa ngokuvamile asisikhulu kakhulu. Ngakho-ke, isikali sesistimu yokukhiqiza insimbi ephrofayili ngokuvamile asisikhulu kakhulu.
Insimbi yesigaba ingenye yezinhlobo ezine ezinkulu zensimbi (okumise, ucingo, ipuleti, neshubhu), futhi iyinsimbi esetshenziswa kakhulu. Ngokwesimo sesigaba, insimbi yesigaba ihlukaniswe ngensimbi yesigaba esilula kanye nensimbi yesigaba esiyinkimbinkimbi noma esikhethekile (insimbi ekhethekile). Isici sangaphambili ukuthi ama-tangents enziwe nganoma isiphi isikhathi kumngcele wesigaba esiphambene ngokuvamile awaphambanisi esigabeni. Okufana njengokuthi: insimbi yesikwele, insimbi eyindilinga, insimbi eyisicaba, insimbi ye-engeli, insimbi ene-hexagonal, njll.; izinsimbi ezivamile ezinomumo okhethekile zifaka insimbi yozimele wewindi eligoqelwe ngokushisayo, insimbi ye-ploughshare, insimbi yesigaba esigoqelwe ngokushisayo yamasondo okugcina amasondo emoto, insimbi yesigaba esigoqelwe ngokushisayo yama-track plate, namarimu esondo emoto. Insimbi yesigaba esigoqiwe esishisayo, isitimela sensimbi, insimbi yebhola eyisicaba yokwakha umkhumbi, insimbi yekhoyili yekhebula, insimbi ye-scraper, njll.
