Izakhi zokufaka ze-DTH ezineflange eboshwe zibalulekile emkhakheni wokwakha izisekelo ezijulile nendlela ye-geotechnical. Lezi zithuluzi ezikhethekile zenzelwe ukuthuthukisa ukusebenza nokusebenza kahle kwemisebenzi yokubhoboza phansi (DTH), ikakhulukazi lapho kuxoxwa ngemiphumela enedijithi enkulu. Ukwakhiwa kweflange eboshwe kwenza kube lula ukuhlanganiswa okuqinisekisiwe phakathi kwecasing nezinsiza zokubhoboza, kuqinisekisa ukuzinza nokunciphisa ingozi yokuphuma ngesikhathi sokubhoboza. Ngokuhlinzeka ngosizo oluqinile endaweni yokubhoboza, lezi zikhulumi zibuye zibe negalelo elibalulekile ekuqiniseni umhlabathi ophakanyisiwe futhi ziwuvikela ekudengeni, okuyinto ebalulekile ukuze kuqinisekiswe ukuphepha nokwakhiwa okuhle. Ngesikhathi sokusebenza, izakhi zokufaka ze-DTH zisetshenziswa ngokubambisana nezinsiza zokubhoboza ze-DTH kanye nezinsiza zokusebenza ukuze kuthuthukiswe inqubo yokubhoboza. Le mekanism ibandakanya insiza yokubhoboza esebenza ekupheleni komugqa wecasing, ivumela ukungena kahle ezindlini ezahlukene zomhlabathi, kuhlanganisa nezinhlobo eziyinkinga zezitina. Njengoba i-DTH hammer iphoqa iphinifa phansi, umoya ovinjiwe uholelwa ezakhiwini ze-casing ukuze kube nokukhipha okwenziwe kohlu lwezitatimende. Le ndlela ithuthukisa ukusebenza kahle kokubhoboza futhi inciphisa isikhathi sokuphumula, iyenza ithandwe ezinhlelweni ze-geotechnical ezinkulu. Izicelo zezakhi zokufaka ze-DTH ezineflange eboshwe ziningi, ikakhulukazi ezinhlelweni ezidinga izisekelo ezijulile, njengokufakwa kwepiles, ama-caisson, nezinhlelo zokuxhumanisa. Zivame ukusetshenziswa ezinkundleni zomphakathi, lapho isikhala silinganiselwe futhi ukunemba kubalulekile. Ngaphezu kwalokho, lezi zikhulumi zithola ukusizakala ezinqubweni zokwenza umhlaba, lapho zisekela imisebenzi efana nokulungiswa komhlabathi nokugrouta. I-versatility yazo yenza ukuthi zifanelekile ezimweni eziyizinkulungwane ezahlukahlukene, kusukela emhlabeni onobungozi kuya ezingeni eliphezulu lezakhiwo. Uma ukhetha izakhi zokufaka ze-DTH, kufanele kubhekwe izincazelo ezithile. I-diameter ye-casing kumele ihambisane nezidingo zephrojekthi, imvamisa ihluka ukusuka kwi-6 inches ukuya kwi-12 inches noma ngaphezulu, kuye ngezinga lokusebenza. Ukwakheka kwesikhumba kuyinto ebalulekile, njengoba insimbi eqinile noma izinto ze-alloy zithandwa ngenxa yokuhlala kwayo nokumelana nokugqoka. Izincazelo ze-thread, kuhlanganisa nokuqonda kanye ne-profile ye-thread, zibalulekile ukuze kuqinisekiswe ukufaneleka okuqinisekisiwe kanye nokusebenza kahle. Ngaphezu kwalokho, ubude bezakhiwo ze-casing kufanele bukungezwe ngokuya ngokuqonda kwe-borehole nokuthi iyiphi indlela yokubhoboza esebenzisiwe. Ngaphandle kwalokho, ukuhlanganiswa kwezakhi zokufaka ze-DTH ezineflange eboshwe ezinhlelweni ezinzima zokwakha izisekelo nezokuhlola i-geotechnical kuthuthukisa kakhulu ukusebenza kahle nokuphepha. Ngokuhlinzeka ngensiza ethembekile futhi kuthuthukiswe izinqubo zokubhoboza ezisebenzayo, lezi zingxenye zibalulekile kumathuluzi abakhokheli nabaklami abazinikele ekuqedeni imisebenzi ye-geotechnical eyinkimbinkimbi. Ukuze unikeze izakhi zokufaka ze-DTH ezisezingeni eliphezulu akukhulisi kuphela isikhathi sephrojekthi kodwa futhi kubalulekile empumelelweni yesikhathi eside yezinhlelo zezakhiwo ezinamakhono ahlukene.
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