Izinsiza Zokubhoboza I-Jet Grouting

Ama-rigs e-jet grouting ahlumiwe ngama-crawler anguchwepheshe othize ngaphakathi kwezinhlelo ze-jet grouting ezilula, ahloselwe ukufaka i-grout yekhono eliphezulu ngezinhlaka ezilawulwayo zokubhoboza zokulawula umhlabathi nokugcina izicelo ekwakhiweni kwemithombo ejulile. Lawa ma-rigs axuba ukuhambisa, ukumelana, kanye nokunemba ukuze aqhube imisebenzi ye-jet grouting elawulwe ngezimo ezinzima ze-subsurface lapho uhlobo lwezisetshenziswa ezivamile ezimotweni lungasebenza kahle. Ekwakheni izisekelo ezijulile, ama-rigs e-crawler jet grouting asetshenziswa ukuze adale futhi aqine odongeni beziqhwa, anqande izixhumi zezingqimba zezinhlaka, futhi athuthukise izakhiwo zomhlaba ngaphambi kokufaka noma ukusebenza. Izicelo zabo eziyinhloko zihlanganisa ukukhiqiza odongeni be-diaphragm kanye nezindwangu zokunqanda amanzi emathilini ekwakhiweni kwedamu nasezimayini, ukudala odongeni be-secant noma ukufanisa ama-pile ngemuva kwe-jet-assisted boring nokuhlanganiswa komhlabathi, ukuzinza kwemivunguvungu eduze kwezindawo zokumba, ukwenza imisebenzi yokuxuba umhlabathi ukuze kuvele izakhiwo ze-composite soil-cement, nokwenza imisebenzi ye-post-grouting ukuze kuvinjelwe izikhala nezikhala ezisemqoka emisebenzini ye-pile eqediwe. Ipulatifomu ye-crawler ibalulekile kakhulu ezindaweni ezinesithintelo sokufinyelela nasemhlabathini othambile noma ongazinzile lapho ukusabalala kwegagasi kuqinisekisa ingcindezi ephansi yendawo kanye nokuthuthukiswa kokuma. Umthetho osebenzayo ubandakanya ukufaka ingcindezi ye-grout ngohlelo lokufaka olwalawulwa ukuze kudaleke i-jet ehlosiwe ngqo kokwakha. Njengoba umhloli ejika, i-jet ejikayo iyahlakaza futhi ikhiphe amakhasi omhlaba, idala ikholomu ye-grouted eyindilinga. I-grout—evamile ukuba ama-suspensions kanye nezakhiwo zama-rheological—igcwalisa umgodi owembuliwe, iqinisekisa ukuhlanganiswa kwemishini nomhlabathi ozungezile. Ukucaciswa kwezisetshenziswa kudinga ukulawula kahle ingcindezi yokuphuma kwe-jet (evamile engu-250–450 bar kwemithamo elinganayo, 350–600 bar kumasampulu e-granular), i-viscosity ye-grout, kanye nezinga lokufaka ukuze kufezwe ububanzi bekholomu bezenzo kanye namandla. I-velocity yokuhoxa ukusuka depth of injection ilawula ngokuqondile i-geometri yekholomu yokugcina nezithombe zokuhlangana phakathi kwamakholomu asondele. Izinhlaka ezijwayelekile zihlanganisa ama-rigs e-crawler anamahluko owodwa agxile emsebenzini, izinhlelo ezimbili ze-moniya zokwakha imifantu emikhulu, nezinhlelo ezihlanganisiwe ezixuba i-jet grouting ne-casing advancement ukuze kuthuthukiswe ukuhamba komhlaba ezinzwaneni ezilula. Izisetshenziswa zihluka ngobubanzi bemikhondo, amandla omsindo (evamile engu-50–150 kW hydraulic drive), ubukhulu bokusebenza obuphezulu (10–50 m), kanye ne-capacity ye-grout pump (100–300 L/min). Izimfanelo zokukhetha zibhalansela izidingo ezithile zokuphrojekthi: ubude nodlulele, ukwakheka komhlaba nokuphakama okungaconsi, izimo zamanzi, ububanzi bekholomu obudingekayo kanye nemithetho yokuhlangana, ukufinyelela endaweni kanye ne-capacity yokuphatha umhlaba, kanye nezithiyo zesikhawu. Ukusabalalisa umthwalo wokugibela kuba kubalulekile ezimweni eziphatshwayo noma ezingagciniwe. Ukukhetha phakathi kokuhlola okukodwa noma okuningi kuncike ekwakheni ububanzi bekholomu nokusebenza. Ukuqhutshwa kwezimali ze-jet grouting kuhola ngokuqondile ku-EN 12716 (Ukusebenza kwemisebenzi ye-geo-technical ekhethekile - I-jet grouting), EN 14199 (Ama-micropiles), kanye ne-ISO 21477 (Ukuhlonishwa nokwakhiwa kwezakhiwo zesikhala). Ukuvumelana kwezisetshenziswa ne-PED 2014/68/EU (I-Pressure Equipment Directive) kanye nemigomo ye-ATEX kuqinisekisa ukusebenza okuhle kwezinhlelo ezisebenza nge-pressurized.