Ama-crane aphezulu kwi-engineering yeziqalo ezijulile asebenza njengesistimu yokusekela imishini ebalulekile yokufaka, ukumisela, nokuphathwa kwengxenye, amathuluzi, nezinto ezidingekayo ngesikhathi sokwakhiwa komfanekiso wezindonga zomhlaba kanye ne-cutoff curtain. Lezi ziqalo zenziwa zifaka amandla okuphakamisa endaweni ethile nangokuhleleka okudingekayo ukuze ziphathe izingxenye ezinzima ezifana nezinto zokwenziwa, amachibi e-tremie, amathuluzi okuthola, nemishini yokufaka ezindaweni ezahlukene nokuqhubeka komsebenzi. Njengokwakhiwa okwengeziwe, ama-crane aphezulu angxenye yesakhiwo esijulile esikhulu sokuhamba nokwakha okwenza kube nokuphumelela ekwenzeni izindlela ezikhethekile zokwakha iziqalo. Ama-crane aphezulu asetshenziswa ezindleleni eziningi zokwakha ezijulile. Ngesikhathi sokwakha isithunzi somgudu (D-wall), ama-crane aphatha ama-guides, amachibi e-tremie, izikhwama zokudonswa noma ama-clamshell, kanye nemishini yokulawula ukujikeleza kwe-fluid. Ekufakweni kwezindonga zokulawula, kungakhathaliseki ukuthi kusebenziswa izindlela zokudonsa ezihlabelekileyo noma eziphendukayo, ama-crane ahlukanisa futhi apha izingxenye zemishini yokudonsa, ama-casing strings, kanye nezinhlelo zokujikeleza ezinomklamo. Asekelwa futhi akhululwa ekwakhiweni kwamaphayiphi e-secant kanye ne-tangent ngokuphatha amathuluzi okudonsa, ama-casing, nezakhiwo zokuxhaswa. Ekufakweni kweziqalo ze-sheet pile, ama-crane aphezulu aphatha ama-sheet pile athile, ama-hammers e-vibro-driven noma ama-impact-driven, kanye nezingqikithi zokushayela ezihlobene. Ekuqhamukeni kwe-jet grouting, ama-crane aphatha ama-masts okudonsa, aqapha amaqoqo, kanye nama-nozzle headers akhethekile ezingeni eliphakeme lokusebenza. Izicelo zokmixing zomhlaba zisebenzisa ukwesekwa kwamakhrane ekufakweni kwe-continuous flight auger (CFA) kanye nokubekwa kwesigaba se-sand-cement. Ngokwenziwa, ama-crane aphezulu asebenza ngezinhlelo zokusebenza kwemishini noma ze-hydraulic, lapho carga idluliswa ngama-wire rope slings, amabhawa angozibuzileyo, noma ama-configurations akhethekile. Ukuqapha ukusebenza kubalulekile—ukubala ukumiswa kufanele kubheke izici eziphakeme zokuhamba, ukumelana komoya ngesikhathi sokuhlehlisa okungokwezinto ezithile, kanye ne-inertia yemishini ngesikhathi sokuphakamisa nokwehla. Ukuqinisekisa ukuhleleka kwe-positioning kuhlobene ngqo nokunembile kokufaka kanye nokuhlelwa kwesikhawu sokwakha, ikakhulukazi ezindaweni zasemadolobheni lapho ukuhamba kokwenziwe kufanele kuphathwe ngaphakathi kwezindawo zokusebenza ezijulile. Izilungiso zama-crane aphezulu ezitholakalayo emakethe ziqinisekisa izikhala eziphakeme ezivuthukayo eziyaziwa ngokuhlukile ezihlanganisa ama-crane ajwayelekile alandelayo kanye nemifudlana (20-500 metric tonne capacity) kuya kumakholoni amaningi (30-600 metric tonne capacity) ukuze kuqhutshekwe nemisebenzi ehlelekile. Ama-plathofom a-roller-mounted ahlinzeka ngozinzo oluphakeme ezintabeni ezithambile noma ezindaweni ezinekhono elincane. Izilungiso ezikhethekile zifaka ukuphakanyiswa kwemithi, ama-rigging packages e-heavy-duty, kanye ne-certification ye-subsurface lapho kudingeka ukubekwa kwezingxenye ezisemanzini. Imishini yesimanje ihlanganisa ukulawulwa kwamacellload, izinhlelo zokuvikela ukugqashuka, kanye nobuchwepheshe bokubeka ngesikhathi sangempela ukuze kuqinisekiswe ukuphepha nokunembile kokusebenza. Izinga lokukhetha lifaka isikhala esifanelekile sokusebenza okuphezulu (kufaka phakathi ubunzima bempahla kanye nezici eziphakeme), ububanzi bokusebenza okuphezulu kanye nezinga le-hook elihambisana ne-geometry yokumba, izithiyo zomhlaba, kanye nezithiyo zokufinyelela ezithize. Izici zomoya ezifaka ukufakwa komoya, izinga lokushisa lokusebenza, kanye nezidingo zokuvikela kwesimo sezulu ziba nomthelela ekucaciseni imishini. Ukuhambisana nemithetho ye-EN 13000 (Ama-Cranes Okuhamba—Ukwaziswa), EN 14439 (Ama-Tower Cranes—Ukwaziswa), kanye ne-ISO 4301-1 (Ukuhlukaniswa Kwe-Crane) kuyadingeka. Izidingo zokuqinisekisa zabaphathi kanye nezinhlelo zokuhlolwa kwejwayelekile kufanele zihambisane nemithetho yezikhungo zendawo nezincwadi zomkhiqizi. isikhathi sokuphumula kwemishini, imfanelo yok维护, kanye nokutholakala kwenhloso yomphakathi kufanele kuhlonishwe ezinqumweni zokugcina zokukhethwa kwamakhrane kumaphrojekthi ethize.
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