Ithrekhi eziphakeme zihlala zisebenza njengemikhiqizo yokuhamba esezingeni eliphezulu, eziklamelwe ukuhamba imishini enkulu, esindayo, kanye nemishini enkulu ezindaweni zokwakha izisekelo ezijulile. Njengemishini eyengeziwe, zidlala indima ebalulekile ekuthumeleni ama-rig okumbiwa, ama-piling hammers, ama-vibratory compactors, izikhwama ezingama-sheet piling, neminye imishini yokwakha esetshenziswa ekwenzeni ama-diaphragm walls, ama-cutoff curtains, izinhlelo ze-secant pile, ama-sheet pile walls, izinhlelo zokusebenza ze-jet grouting, kanye nezinsiza zokuxubha umhlabathi. Ukuhanjiswa kwemishini yokwakha izisekelo kubonisa ukubaluleka kokusebenza ekwenzeni izinhlelo zamaphrojekthi, njengoba usayizi nokwakheka kwemishini yokumbiwa nokupilinga yesimanje kuvame ukudlula umthamo wezokuhamba ojwayelekile, kudinga izimoto ezikhethekile ezifanele imithetho yokulayisha ama-axle nezithiyo zenhla zomgwaqo. Ama-low bed trailers anesakhiwo sedekhi esiphansi esibekwe phansi kwezinga le-axle yangemuva yedrayivu, okwenza kube lula ukuhambisa imishini emide — kuhlanganise nezinsika ezedlula amamitha angama-40 — ngenkathi kugcinwa uhlu lwemithetho yesikhumbuzo somgwaqo evame ukusuka kumamitha angu-4.0 ukuya ku-4.5. Amadekhi akhiwe nge-steel edlula amandla futhi ahlanganisa eziningi izilungiselelo ze-axle, ngokuvamile ezahlukene kusuka kumane kuya kweight axles, ukuze kuhlangatshezwane nezithiyo zokulayisha eziqondile phezu kwephezulu elibanzi futhi kuhlangatshezwane nezinga lezithuthi lokukhula. Izinguqulo zesimanje zisebenzisa izinhlelo zokweseka ezisebenza nge-hydraulic noma eziphathwayo ukuze kuvalwe idokhumenti futhi lenze umthelela omuhle ekulayisheni nasekukhishweni kwemishini ezindaweni ezahlukene neziqondiso zomhlabathi. Izimo zomshini kule ndawo zifaka phakathi ama-low beds anedekhi eqinile ejwayelekile, izibonelo ze-hydraulic drop-deck ezivumela ukwehliswa kwe-deck okudlulele imithwalo emikhulu, kanye nezinhlelo ezikhethekile ze-multi-axle eziklanyelwe imishini edlula amatanisi angama-100. Izimo ezihehayo zihlanganisa izingxenye ezisuswayo ze-gooseneck, amapulatifomu alungiswayo, nezinhlelo ezihlanganisiwe zokuphosa ukuze kuqinisekiswe ukufaka ama-rig amakhulu okumbiwa, izisekelo ze-vibratory hammer, nezikhala zokupilinga ezizindaweni ezahlukene kanye nezindawo eziyinkimbinkimbi. Ukukhetha ama-trailers afanele kudinga ukuhlolwa okuphelele kwezimo ezithile zobuchwepheshe. Ukwakha umthamo wemishini nokubeka isikhala somhlabathi kumele kubalwe ukuze kuqinisekiswe ukuhambisana nemithetho yokulayisha ama-axle futhi kuvinjwe ukulayishwa komlocal. Ikhono lokuthwala umhlabathi ezindaweni zokulayisha kumele kuhlolwe ukuze kuqondwe kahle uma kudingeka ama-air suspension systems noma ama-mats wokwabelana ngoload ukuze kuvinjwe ukugcina umhlaba ophuthumayo. I-geometri yendawo ethunyelwe — kuhlanganise nosayizi beziteshi zokufinyelela, ukuhamba okuphezulu, amandla omgwaqo, kanye nezinga lokukhuphuka — kumele kuhlolwe ngesikhathi sokuhlela ukuze kuqinisekiswe ukufinyelela kwama-trailer. Izindlela zokubopha imishini kumele zinikeze amandla afanele wokubambisana ngenkathi kusekela izindawo zokufaka izakhi. Ukuhambisana nemithetho yokuhamba kubalulekile, kuhlanganise nokuhambisana nezilinganiso nemithwalo emikhulu evunyelwe abazimele. Ukuhanjiswa kwemithwalo engajwayelekile kudinga izimvume ezikhethekile kanye nokuhlela indlela okwehlisa izithiyo zomthwalo, i-geometri yomgwaqo, kanye nezithiyo zendawo. Abakhi bezisekelo ezijulile aban professional bavame ukugcina ubudlelwane nabathumeli abakhethekile abanama-low bed trailers ahlelwa ngendlela efanele nokwazi ukusingatha ukuhamba kwemishini eyinkimbinkimbi.
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