Ama-Auger Okushintsha (Full Displacement Piling — FDP)

Izikhonkwane zokuhambisa, eziklamelwe ngokukhethekile ukwakha izinsika zokuhambisa ngokuphelele (FDP), zidlala indima ebaluleke kakhulu emkhakheni wezisisekelo ezijulile nasekugcineni kwezobunjiniyela bempucuko. Lezi zithombe eziyinqaba zenzelwe ukuhlinzeka ngokufakwa kwezinsika ezijulile ngenkathi zinciphisa ukuphazamiseka komhlabathi, ngokwenza kube ukukhetha okuhle kakhulu kwezimali ezidinga ukunemba nokuzinza. Ngokusebenzisa isikhumbuzo esiyingqayizivele, izikhonkwane zokuhambisa ziphumelelayo ukuphucula umhlabathi njengoba zimpuma ngaphakathi komhlaba, zivumela ukudalwa kwezimbobo ezihambelana nezinto ezahlukene zokwakha, njengezinsika nezishwe. Izinqubo zokusebenza ezisemva kwezikhonkwane zokuhambisa ziqondile kodwa zisebenza kahle kakhulu. Uma zisetshenziswe, isikhonkwane sihamba sithinta umhlaba sikhuphukela phezulu, sithuma umhlabathi obumbene endlunkulu kunokuthi uwukhiphe. Le nqubo ikhulisa ubukhulu bomhlabathi futhi yehlisa ingozi yokuhamba komhlabathi, ngaleyo ndlela iqinisekisa imvelo ezinzile yezinsiza zokwakha ezilandelayo. Le ndlela yokuhambisa iphinde inikeze inzuzo enkulu uma kuqhathaniswa nezindlela ezijwayelekile zokuhlola, ikakhulukazi emhlabathini okuhlangana nokuphakeme, njengoba yehlisa ingozi yokuhlukumeza umhlabathi futhi igcine ubumsulwa bomhlaba obuzungezile. Izikhonkwane zokuhambisa zisetshenziswa ezinhlelweni eziningi emkhakheni wezisisekelo ezijulile nasekugcineni kwezobunjiniyela. Zisebenza kahle kakhulu ekwakheni izinsika ezijulile ezindaweni zasemadolobheni, lapho izithiyo zendawo nezinsiza ezikhona zenza kube nzima izindlela zokuhlanza ezijwayelekile. Ngaphezu kwalokho, lezi zikhonkwane zilungele izinhlelo zokuthuthukiswa komhlaba ezihloselwe ukukhulisa amandla okuphakamisa nokuzinza, kanye nokuqinisekisa izinhlelo zokuxhasa ezakhiweni ezikhona ezidinga ukwesekwa okwengeziwe. Ukuhluka kwazo kwenza kube lula ukusebenzisa ezimweni ezahlukene zomhlaba, kuhlanganise ne-clay, silt, nezimila ezinzima. Izincazelo ezivamile zezikhonkwane zokuhambisa zifaka phakathi ububanzi obuhlukahlukene nobude ukuze zifeze izidingo ezithile zephrojekthi. Lezi zikhonkwane zingaba nobubanzi obuphakathi kuka-300 mm kuze kube ngaphezu kuka-1,000 mm, nobude obungakhula bube buncane kuze kube ku-30 meters noma ngaphezu. Ukukhetha usayizi wesikhonkwane nokwakheka kuyadingeka, njengoba kumele kuhambisane nezimo ze-geological zephrojekthi nezidingo zokuphakela izinsika zokwakha ezisekelwa. Izindlela zokukhetha izikhonkwane zokuhambisa zifaka phakathi izinto ezifana nohlobo lwezinto ezisetshenziswayo, ubukhulu obufanele bokufaka, nezici zomhlaba ezitholakala endaweni. Lapho kukhethwa izikhonkwane zokuhambisa zephrojekthi, kubalulekile ukuthi ucabangele ukufaneleka kokwakhiwa kwemishini yokuhlinza, umthamo odingekayo nezinga lokujikeleza, kanye nesikhathi sonke sephrojekthi. Ngaphezu kwalokho, ubuchwepheshe bomsebenzi kanye nokuqonda kwabo ngezimo zomhlaba wendawo kungashintsha kakhulu impumelelo yenkqubo yokufaka. Ngokusebenzisa izinzuzo zezikhonkwane zokuhambisa, abakhiqizi bangathola izixazululo ezisebenzayo nezithembekile zokwakha eziyanelisa izidingo zamaphrojekthi okwakha kwezobunjiniyela bempucuko zamanje. Lokhu kubenza babe yinsizakusebenza ebalulekile kunoma iyiphi inkampani ethintekayo ekwakheni izinsika ezijulile nasezinhlelweni zokuthuthukiswa komhlaba.