Imishini yokubholela ye-rotary esebenziselwa ukusebenza kwe-Cutter Soil Mixing (CSM) imelela uhlelo oluthile lwezixhobo zesisekelo esijulile, olwakhiwe ukuze ukhubaze futhi uqinisekise umhlabathi ngasikhathi sinye ngokusebenzisa indlela yokuhlanganisa in-situ. Lezi zinsiza ziwumgogodla obalulekile wezokuthuthukiswa komhlaba kanye nezinhlelo zokugcina ezisetshenziselwa ubunjiniyela bezisekelo ezijulile, ikakhulukazi lapho kudingeka khona izithiyo eziphakeme noma izakhiwo ze-soil-cement composite. Ubuchwepheshe be-CSM buvumela abakhiqizi ukuba bakhe amakhono aqhubekayo, ajikijekayo omhlabathi ahlukanisiwe kusukela ebusweni bomhlaba kuye ezindaweni ezichaziwe, ukukhiqiza ama-centre elamu emadlaleni okuqeda kanye nezindonga ze-diaphragm ezinemigomo yokuhlola futhi eziphakeme ngempela. Izinhlelo eziyinhloko zokusebenza ze-rotary CSM drilling rigs zifaka phakathi ukwakhiwa kwamakhethini ehlaba amanzi akhanya ukuze kugcinwe imfucumfucu enobungozi, ukunciphisa ukungcoliswa, kanye nezinhlelo zokwakha imigodi; ukusekela izakhiwo ze-diaphragm ezindaweni ezinzulu nasekukhulumeni; izithiyo zokuhwanqa ekubhekaneni nezikhukhula; izindonga eziphathelene nezinkanyezi lapho amakholomu omhlabathi enza ukusekela okuyinhloko; nezinhlelo zokuthuthukisa umhlaba ezidinga izisekelo zomhlabathi eziphakeme. Lezi zinsizakusebenza zisebenza ngokufanayo ezindaweni ezilwandle zokwakha ama-cofferdam nakukhampani ethinta ukuwasha lapho ukumba okujwayelekile kungasebenzi kahle. Ukuhlukahluka kobuchwepheshe be-CSM kwenza lezi zinsiza zibe nezibopho ezinzima ezinhlelweni ezidinga izithiyo ze-soil-cement eziphathelene nemigomo yokukhuphuka engama-15 kuye kwangu-40 metres, kuye ngezimo zomhlabathi kanye nekhono lemishini. Ngokuqhubekayo, ama-rotary CSM rigs asebenza ngokujikeleza kwe-augur ehlukile noma ithuluzi lokuhlanganisa elithinta umhlabathi ngesikhathi engeza izithasiselo ezikhuthazayo—ngokuvamile i-Portland cement, i-bentonite, noma izibopho ezikhethekile—ngeziphumo ezisematheni. Njengoba i-augur ijikeleza futhi iqhubeka, umhlabathi uyakhulunywa futhi uhlinzekwa ngokuhlanganyela nesibopho ngezinga, futhi njengoba ithuluzi lihlala, i-binder entsha iqhubeka nokufakwa ukuze kuqinisekiswe ukwakheka okuvumelanayo kwamakholomu. Ukunyakaza okujikeleza, kuhambisana nezinga lokuphakathi kokuhlinzekwa kanye nezivinyo zokujikeleza, kuqukethe umkhiqizo wokuhlanganisa kanye nenhlonipho yekholomu. Ukulinganisa okuqondile kwezinga kanye nokulandela izikhala (ivame ukuhamba nge-GPS noma izinhlelo ze-laser) kuqinisekisa ukwakhiwa kwamakholomu ajikelezayo, kunciphisa izikhala ezindongeni ezisindayo noma emnyango. Izimo zemishini ezitholakalayo kule ngqikithi zikhula ukusuka kumarig ezibekwe ezithuthwini ezinhle ezinhlelweni zezikhala ezijulile, ezinikeza ukunyakaza okusheshayo nokukwazi ukufinyelela ezindaweni eziphakathi, kuya kumarig ephelele wezithombe angakwazi ukuphatha izimo ze-geological eziyinkimbinkimbi—i-clay eqinile, i-sand enegwebu, kanye nezinto eziyisithelo eziyimfashini. Ukukhethwa kwe-gear kusekelwe kumthamo we-torque otholakalayo (ngokuvamile u-100-300 kNm), ububanzi be-augur (600-1200 mm), ukujula kokubholela okuphezulu, umthamo wesistimu yokufaka, kanye nezidingo zokuzinzile ezifanele izimo zomhlaba ezihlukene. Imodeli advanced zifaka izinhlelo zokulandelela ezitholakala ngesikhathi esiphilayo ezilandelela ingcindezi yokufaka, isu le-penetration, isivinini sokujikeleza, kanye nomthamo we-binder efakiwe, ihlinzeka ngedokhumenti ye-quality assurance kanye nokulawula inqubo phakathi kokusebenza. Izinto ezibalulekile zokukhetha i-CSM drilling rigs zihlanganisa amandla we-torque wemishini ngokwedinga kokuphikisana komhlaba; i-geometry ye-augur ehloswe kumagciwane athile; ukuphakanyiswa kokuzinzile okuvumelanayo nezimo zomhlaba kanye nezindawo zokuphakama; amandla okujula okusebenza uma kuziwa ezidingweni zephrojekthi; ukusebenza kahle kokudla nezidingo zokuhlanza; kanye nokuphakanyiswa kwamathuluzi akhethekile ezimfanekisweni, lezi zinsiza, noma igeological ethile. Abasebenzi kufanele bahlolisise izinhlelo zokuzinzile – ama-outriggers, amandla okwenza iziqondiso, kanye nemikhono yokubamba – ebalulekile ukuze kuqhubeke kuphephile ukusebenza ezindaweni eziphakeme noma ezinzima. Izindinganiso zamazwe omhlaba ezilawula ukusebenza kwe-CSM zifaka i-EN 1538 (Ukwenziwa Kwamsebenzi Okhethekile KwezeMvelo—Izindonga Zokuphaka) kanye ne-ISO 21503 (Iziqondiso Nezidingo Zokuphaka), ezisungula izidingo ezincane zokuhlola, izinqubo zokuhlola, nezimalimboleko zokwamukela. I-DIN 4126 ihlinzeka ngemigomo ye-German-standard yokuhlanganisa ijubane elijulile, kanti izikhodi zikazwelonke zivame ukufuna ukuqhuba ukuvunyelwa kwekhanda kwe-pressyo ye-soil-cement ngokusebenzisa izinhlelo ze-coring, ukuhlaziywa kwamalabhorethri, nokuhlolwa kokuphuma kweganga.
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