Imishini eyengeziwe yokubhola i-Continuous Flight Auger (CFA) iwumkhakha obalulekile wezinsiza ezikhethekile nezithako eziyisisekelo zokuphumelela kokufakwa kwepali ezijulile kanye nezinhlelo zokuthuthukisa umhlaba. Ukubhola kwe-CFA kuyindlela eyisisekelo emsebenzini wezokwakha nokwakha isikhumbuzo, ikakhulukazi kubalulekile ngenxa yokukwazi kwalo ukubhekana nezimo zomhlaba ezihlukahlukene ngenkathi kugcinwa ubunjalo bezakhiwo ngesikhathi sokwakha kepali. Imishini eyengeziwe esetshenziswayo ezinhlelweni ze-CFA isekela ukuhamba, ukufakwa kwezinto, nezinqubo zokuhlola eziqinisekisa ikhwalithi yephali, amandla okwanda, nokuzinza kwesikhathi eside. Lezi zinsiza zisebenza ngokuhlanganyela nemishini eyinhloko yokubhola ukuvumela abakhangisi kanye nochwepheshe bokwakha ukukhiqiza izixazululo ezinokwethenjelwa ezikhungweni ze-geotechnical ezehlukene, kusuka ekuthuthukiseni amadolobha kanye nokuqhamuka kwezinsiza kuya ezinhlelweni zezimboni nezokuhweba. Uhlaka lwezinsiza ezisizayo zokubhola i-CFA luqukethe amathube e-tremie, okuyizinto ezibalulekile zokufakwa kokhonkolo okulawulwayo ngaphakathi kumashalofu ebholile futhi kuvimbele ukungcola okuvela emhlabathini ozungezile noma emanzini aphansi. Izinhlelo zokuhlinzeka ngama-bentonite kanye nemishini yokuphatha i-slurry igcina ukuzinza kokubhola ngesikhathi sokusebenza, ikakhulukazi emhlabathini opholile noma ophakathi namanzi lapho ukwehla kokubhola kuholela ezindleleni ezibucayi. Ukwandiswa kwe-auger, ama-pipes okubhola, izinhlelo zokufaka, kanye nezixhumi ezahlukene zivumela ukuba umjikelezo wokubhola ufike ezindaweni ezidingekayo ngenkathi kugcinwa ukujula kanye nokusebenza kwezakhiwo. Ama-Kelly bars, imishini yokufaka, kanye nemishini yokuhlola inika abaphathi isikhumbuzo esiqondile phezu kwemigomo yokubhola, izinga lokuhamba kwezinto, kanye nempendulo yesikhathi sangempela ngezimo zomhlaba. Lezi zinsiza kumele zihlangabezane nezindinganiso ezinzima zobunjiniyela futhi zikwazi ukumelana nomthwalo wezobunjiniyela nokudluliselwa kwamandla okukhethekile okukhona emsebenzini wezisekelo ezijulile, okwenza ukhetho lwezinto kube yinto ebalulekile empumelelweni yephrojekthi. Ukubhola kwe-CFA kuvamile ukusebenza kahle emhlabathini abambekayo, ama-clay deposits, izendlalelo ze-silt, kanye nezimo ezihlanganisiwe lapho izindlela zokubhola ezifanele zingabhekana nezinselele zokuzinza. Imishini eyengeziwe isekela ukubhola ezindaweni ezishisayo nasezindaweni ezindala ezedlula 30m, ifaneleka ezimweni zomhlaba ezahlukahlukene ezitholwe ngesikhathi sokuhlola izindawo ze-geotechnical kanye nezikhathi zokwakhiwa. Izicelo zifaka phakathi ama-footings angaphezu komthwalo wepali nemisebenzi yokuhlinzekela, ukuphucula kwemvelo, ama-ankers omhlaba, kanye nezinhlelo zokwakha ezikhethekile ezidinga ukunemba nokwethembeka. Ikhwalithi yemishini eyengeziwe ithinta ngqo ukusebenza kahle kokubhola, isikhathi sokuphindaphinda, kanye nekhwalithi yokugcina yamapali afakwe—izici ezithinta izindleko zephrojekthi, izinhlelo, kanye nokusebenza kwezakhiwo. Kubakhi bezisekelo, izinkampani zobunjiniyela, kanye nabahlinzeki bezinsiza abasebenza ngaphakathi kwe-TerraForce marketplace, ukufinyelela ezincwadini eziphelele zemishini eyengeziwe kanye nezinhlelo zokuhlinzeka kuvumela ukuhlela okungapheli kwemisebenzi yokubhola kwe-CFA futhi kuqinisekise ukuhambisana nezindinganiso zokwakha ezithuthuke kakhulu nezindinganiso ze-geotechnical emhlabeni wonke nakwezokuthengisa zomhlaba ezifundazweni.
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