Amabhithi neZicathulo ze-Pilot

Amathuluzi okuphayisela nezicathulo zema-pilot zibalulekile ezincwadini zokuhamba ezingama-rotary aphindwe kabili zokwakhiwa kwezizinda kanye nezicelo zobunjiniyela be-geotechnical. Lezi zingxenye zisebenza ndawonye ukukwazi ukufaka i-casing ezindaweni ezinzima zomhlabathi nezinto zomhlaba, kuvumela abakhi ukuthi bashayele izakhiwo eziqinile ezizindeni eziyinkimbinkimbi. Emkhiqizweni wezobuchwepheshe bokuhamba bama-rotary aphindwe kabili, ithuluzi le-pilot lihola inqubo yokuphanda okwathi i-casing shoe ikhokhisa futhi ivikele ipayipi le-casing yangaphandle, ivumela ukuphanda nokufaka i-casing ngesikhathi esifanayo. Le ndlela ehlanganisiwe inciphisa kakhulu isikhathi sokuphanda futhi ithuthukisa ukusebenza kahle uma kuqhathaniswa nezindlela zokuphanda ezijwayelekile. Amathuluzi e-pilot nezicathulo zibaluleke kakhulu ezinhlelweni ezihilela izimo zomhlabathi ezihlanganisayo, lapho ama-layer ahlukahlukene amalahle neziphuzo ezidinga ukulawulwa okufanele kokuhamba kokuphanda nokufaka i-casing. Ukusetshenziswa kwamathuluzi e-pilot nezicathulo kudlula emaphrojekthini ahlukahlukene e-geotechnical, kuhlanganise nokwakhiwa kwamapayipi amakhulu, ukufakwa kwe-caisons, kanye nezinhlelo zokwakha ezijulile ezinesikhumbuzo, izakhiwo eziphakeme, nezakhiwo zezimboni. Lezi zifaka phakathi izimo zomhlabathi ezahlukene ukusuka emabhaleni amanzi kuwo ozinsimbi, amatshe nokhonkolo, nezinhlobonhlobo zomhlaba ezinjenge-pavement, amatshe abomvu nezakhiwo ezixubile. Le mekanisme yokuphanda ye-dual-action ivumela abakhi ukuthi baphumelele ezimeni zomhlaba eziyinkimbinkimbi ngenkathi begcina ukusimama komgudu ngesikhathi sokuphanda. Ngokusebenzisa izicathulo ezikhethekile eziklanyelwe ama-profile e-soil ahlukene nezithwathwa ze-pilot eziklanyelwe izidingo ezithile zokufaka, amaqembu aphanda angalinganisa ukusebenza futhi aqinisekise ukunyuka kwe-casing okuhambisanayo ezindaweni ezinzima. Amathuluzi e-pilot anamuhla ahlanganisa amahhashi abuchwepheshe aphezulu nezakhiwo zensimbi eziqhubekayo ukuze aphephe ezindaweni ezinomthelela omubi ngenkathi egcina ukujula okufanele ngesikhathi sokuphanda. Izicathulo ze-casing, ezihlinzekiwe ngamakhono Okuphanda, zinenhloso ezihambisanayo: zivikela i-casing emonakalweni ngesikhathi sokuhambela emhlabathini onobugovu futhi ziqhubela phambili ekungeneleleni ama-layer avimbelayo. Ukwamukela kwamakhono e-shoe kucaciswa ngokuya ngezimo zomhlaba nezindlela zokuphanda, kuvumela abaphathi ukuba bahlale bephendula izidingo ezithile zokwakhiwa kwezizinda. Noma bezama ukugijimela ezindaweni ezinzima zengxenye ye-granular noma ezimithini eziphukile, amathuluzi e-pilot azikhethiwe futhi agcinwe kahle akhuphula kakhulu ukusebenza kokuphanda futhi anciphise izindleko zeprojekthi ngokunciphisa isikhathi esingasebenzi ne-wear yemishini. Ukukhetha nokwandisa amathuluzi e-pilot nezicathulo kudinga ucwaningo olunzulu lwe-geotechnical kumphakathi kanye nokucabangela ngokucophelela ama-profiles amhlabeni avunyelwe nge-boreholes nezinhlelo zokuhlolwa komhlaba. Oshiwemfundo bokwakha izizinda kumele bahlolisise ukumelana komhlaba okuhlosiwe, ukucwila kwemibono, nezimpawu zendawo ukuze banikeze amakhamphani amathuluzi afanele okuhamba nezindlela. Le ndlela yobuchwepheshe iqinisekisa ukunyuka kwe-casing kwephumelelako, igcina ubumsulwa be-borehole, futhi ihlinzeka ngemibandela ezinzile edingeka ukuqinisekisa ukusekelwa kwezakhiwo ezingozini ezinobuhle ezingaphakathi embonini yokwakha yezizinda ezijulile.