Iziqhingi ze-crawler CFA ezishintshayo ziwumkhakha obalulekile kokwakhiwa nokusekela emathubeni athile, zenza ukufaka izisekelo ezisemathubeni ezigcwele zibe rapid nohlala kahle kwiwo wonke umhlaba. I-CFA (Continuous Flight Auger) ikhuluma ngokusebenza kwe-auger eqhubekayo evakasha umhlabathi ngasikhathi sinye lapho i-concrete iphumelelwa ngemuva kwe-auger, ukudala i-pile egcwele ngaphezu kohlobo lokuhlola. Ikhono lokujikeleza kwesitulo seziqhingi lezi likuvumela ukuthi ikhanda lokubhoboza lishintshe ngokuphelele phakathi kwenqubo yokufaka, ukuze kuhlale isekhaya ukusebenza okuhle kokubhoboza nokunciphisa isikhathi sokufaka uma kuqhathaniswa nezinhlelo ezinomkhawulo. Lezi ziqhingi ziqinile ekubeni zifakwe ezithuthumelayo eziphumelelayo nolwazi olufanele emhlabeni ophumula noma ongekho emthethweni ngoba impahla yento ezihamba ngezinyawo izocindezela, okwenza kube nzima ezindaweni ezinamaxhama, ezisemadolobheni, nasemaphandleni azochwepheshe. Ukusetshenziswa kweziqhingi ezishintshayo ze-CFA zeziqhingi ze-crawler kugubungela izimo zezobuchwepheshe nezine eziqhamuka ezithombeni ezihlukene. Lezi ziqhingi zisebenza kahle kakhulu emhlabeni oxhumene njenge-clay, i-silt, ne-chalk, nakuma-materieli e-granular afana ne-sand ne-gravel. Indlela yokukhishwa kwe- awe eqhubekayo inciphisa ukukhiqizwa kokudoba uma kuqhathaniswa nezindlela zokubhoboza ezivamile, kunciphisa izindleko zokuphuma nokuthinta kwemvelo. Ama-crawler aphelele ajabulela ezimeni ezidinga izimbobo eziningi eduze, njengezixhumi ezinamandla zamaphrojekthi eyinfrastructure, izakhiwo ezinezitezi eziningi, nezixhumi zomkhono. Le tehnologu ikhethekile ezindaweni ezine-akholo elincane, ukufinyelela okuvinjiwe, nezimo zomhlaba ezithambile lapho ukusatshalalisa komthwalo okuvela kwezithuthi ezilandelana kuvimbela ukuphazamiseka komhlaba. Uhlobo lokubhoboza lujwayelekile luhluke phakathi kuka-15 kuya ku-40 meters, nakuba eziqepheshile zesimanje zingathola ukujula okungaphezulu kuye ngemibandela yomhlaba nezincazelo zephrojekthi. Izinzuzo zokwakha zeziqhingi ze-crawler CFA ezishintshayo zincane uma kuqhathaniswa nezindlela ezivamile ze-piling. Ukujikeleza okuqhubekayo kwe- awe kuqinisekisa ukukhishwa okufanele kokudoba kanye nekhwalithi ye-borehole, okuyizinto ezibalulekile ekufezekiseni izincazelo zomklamo zomthwalo. Ukubhoboza kwe-CFA akuthathi phansi, okwenza kufanelekile ezakhiweni ezibucayi ezikuleli, ezakhiweni ezikhona, nasezindaweni zemvelakakhulumi lapho i-pile driving eyenziwa ngokuqhubekayo kungafanele noma kube nenselele. Ukufakwa kwenzeka ngokushesha—izimbobo eziningi zingaqedwa ngosuku kuye ngedlaliso nakwazulu—kunciphisa isikhathi sokuhlinzeka kwephrojekthi. Ukudoba okuphawulelwe kungaphathwa kahle ngezinhlelo zokugcina ezihlobene, kunciphisa izidingo zokuphosa emhlabeni. Ikhono lokujikeleza lisho ukusebenza kahle kwe-awe ezifundeni ezihlangene kanye nemhlabeni ongenaguquko, lapho ukumelana komhlaba okungashintshiki kukhathazela izithuthi ezinomkhawulo. Lezi ziqhingi zifaka ububanzi obuhlukahlukene be-awe, ngokuvamile kusuka ku-300mm kuya ku-900mm noma ngaphezulu, kuvumela onjiniyela ukukhetha usayizi bamapile ahlangabezana nezidingo ezithile zokuthwala namaphuzu womhlaba, kungakhathaliseki ukuthi kuyakwenziwa ukwenza izakhiwo ezincane noma izikhungo ezinzima zemboni eziyadinga umthwalo ophakeme.
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