Ijele yokugeza amaqanda iyindlela ethuthukisiwe yokuthuthukiswa komhlaba nokuzinza komhlabathi ethatha amanzi aphezulu futhi yefreyimu ye-grout ukuze iguqule izici zomhlaba futhi idale izakhiwo ezixhaswe ngaphakathi ngaphansi komhlaba. Le ndlela ye-geotechnical engineering ethize ihilela ukuhlinzeka ngamathambo futhi ithumele imishini ethize yokufaka i-grout ukuze ifake izixazululo eziyinqaba noma ezokhemikhali eziphathelene nepulazi elijulile emhlabeni. Amathuluzi anothando ahlunga futhi axube umhlaba omujwa nama futhi ne-grout, edala izakhiwo zefrikhwe noma imivimbo eqhubekayo ethuthukisa kakhulu amandla okuthwala umhlaba nokuzinza. Ukuhlinzeka ngejethi kuyinzuzo kakhulu ekuhlinzekeni ngezinsiza ezinzima, lapho izimo zomhlaba zidinga ukuhunyushwa ngaphambi kokufakwa kwezinduku noma lapho izakhiwo ezikhona zidinga ukuxhaswa nangokwakha okukhulu. Inqubo yokuhlinzeka ngejethi isebenzisa imishini eyinkimbinkimbi ehlanganisa izinsiza zokuhlinzeka ezikhethekile, izinhlelo zokupompa ezinamandla, amakhanda aphethe okuphakela ngezihluzo eziningi, nezikhungo ezisebenzayo zokulawulwa kokuphakama. Le ndlela ivamise ukusebenza ezikhaleni ezihlanganisela ibhahari ukusuka ku-200 kuya ku-600 bar, ngenkathi umphumela oyedwa unqunywa yizici zomhlaba, ukuphakama okufanele, nezidingo zedijithi yesigaxa. Izinguquko ezintathu eziyinhloko ze-jet grouting zisetshenziswa emsebenzini wezinsiza: izinhlelo ze-fluid eyodwa zomhlaba oqinile, izinhlelo ze-fluid ezimbili ezihlanganisa amanzi ne-grout, kanye nezinhlelo ze-fluid ezintathu ezihlanganisa ezinye izinzuzo zengqikithi. Lezi zinguquko zivumela abathelisi ukuba bazivumelanise nendlela yokufaka i-grout kuzimo ezithile zomhlaba, kusukela kwezihlahla ezilwanyana ngezimbuzi ezifafe nomhlaba ophethwe iqhwa ejulile nezimayini ezishisayo. Izicelo zokuhlinzeka nge-jets kumaphrojekthi evidingweni ezijulile zifaka izithuthukiso zomhlaba ngaphansi kwezakhiwo ezikhona, ukuhlinza umhlaba, ukuhweba kwesizukulwane somhlaba, ukulawula amanzi angaphansi komhlaba nokunciphisa ukuviswa, kanye nokwakha izigaba zomhlabathi-nokuqina zokuqina komthwalo ophakathi. Le ndlela ibonakala ijabulisa kakhulu ekuxhaseni izakhiwo zendawo ezhistorical lapho ukwakhiwa kwezinduku zesiko kungaba yingozi noma kungasizakali, kanye nasekuxazululeni izinkinga ezithile zokuhlinzeka zomhlaba ezindaweni eziguliswa noma emhlabeni wamakholwa onezikhala ezinzima. Ukuhlinzeka ngejethi kusebenza kuzo zonke izigaba zomhlabathi nezakhiwo zegeology, kuhlanganyela nezimo zomhlaba eziguquguqukayo ezitholakala ngesikhathi sokwakhiwa. Le ndlela idala izinguquko ezingapheli ezincwadini zomhlabathi, ithuthukisa amandla okuphonsa, inciphisa ukuvimba, futhi ingcono kakhulu kokuphaka ukuzinza. Odokotela bemikhankaso bakhetha ukuhlinzeka ngejethi kumaphrojekthi adinga ukuguqulwa okuhambisanayo, lapho izindlela zokugxila kwezinduku ezibanzi noma zokugxila okuqhubekayo zingase zingabi namthelela noma zibhabha. Ubuchwepheshe bokulawulwa kwezakhiwo ezindikweni futhi, kuhlanganiswa nezici zokuphephisa zokungathwetshuki nokukhala, kwenza ukuzihambela ngejethi kube yisisombululo esikhundleni sokwakha izimpande zezakhiwo ezithgwala ezindaweni ezihlotshaniswa ezindaweni eziningi.
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