Masu hakowa na rotary da aka tsara don jet grouting suna wakiltar wani sashe na musamman na kayan aikin injiniya na tushe da aka tsara don gudanar da ayyukan jet grouting na matsa lamba mai yawa a cikin ginin tushe mai zurfi da ayyukan inganta ƙasa. Wadannan dandamalin hakowa suna haɗa ƙwarewar hakowa na rotary tare da tsarin jet grouting don ƙirƙirar tsarukan ƙasa-cement masu haɗin gwiwa waɗanda ke daidaita, ƙarfafa, da kuma hana ruwa shigar cikin ƙasa. Haɗin aikin hakowa tare da jet grouting mai matsa lamba yana ba da damar kwangila su shiga cikin ƙwayoyin ƙasa da kuma shigar da abubuwan da ke daidaita, wanda ke sanya waɗannan injin su zama masu mahimmanci don kalubale masu rikitarwa na tushe a cikin ƙasa mai wahala da yanayin ruwa. Masu hakowa na rotary da aka yi amfani da su tare da jet grouting suna amfani a cikin aikace-aikacen tushe mai zurfi da suka haɗa da ginin bango na diaphragm, labulen katanga, bangon pile na secant da tangent, da kuma daidaita gangara da rami na ƙasa. Wadannan injin suna da ƙwarewa wajen ƙirƙirar ginshiƙai na ƙasa-cement masu tsaye ko kusa da tsaye waɗanda ke inganta ƙarfin ɗaukar nauyi, rage permeability, da kuma samar da daidaito na gefe. A cikin kula da ruwa, labulen jet grouting suna hana shigar ruwa da jigilar gurbataccen ruwa ta hanyar ruwan ƙasa da aka gurbata. Don aikin gyaran tushe da gyara, waɗannan tsarin suna shiga cikin wuraren rauni na gine-ginen da aka riga aka gina kuma suna shigar da abubuwan haɗawa ba tare da buƙatar manyan hakowa ko katsewa ga tsarin da aka riga aka gina ba. Ka'idar aiki ta jet grouting tana haɗa hakowa na rotary tare da shigar da ruwa mai matsa lamba. Mast na hakowa na rotary yana tura bututun grouting na musamman cikin ƙasa zuwa zurfin da aka nufa. Ruwan grouting mai matsa lamba—yawanci slurry na siminti ko hanyoyin sinadarai—ana fitar da shi ta hanyar jets a ƙarshen bututun a ƙarƙashin matsa lamba daga 200 zuwa 600 bar (20 zuwa 60 MPa). Wadannan jets masu sauri suna lalata da motsa ƙwayoyin ƙasa, suna haɗa su da kayan haɗin da aka shigar. Yayin da aka cire bututun hakowa yayin da ake riƙe matsa lamba da ƙarfin juyawa, wani tarin ƙasa-cement yana haɓaka. Hanyar lalata ta jet, tare da halayen haɗin na grouting, tana ƙirƙirar tsarukan haɗin gwiwa tare da ingantaccen halayen geotechnical da suka fi na ƙasa sabo. Tsarin kayan aiki a cikin wannan rukuni yawanci yana haɗa da tsarin ruwa guda (inda kawai slurry na siminti ake shigar), tsarin ruwa biyu (haɗa ruwa da siminti don ingantaccen isa da daidaito), da tsarin ruwa uku (haɗa ruwa, iska, da siminti don ingantaccen motsa ƙasa da ingantaccen tsarin ginshiƙi). Masu hakowa suna daga kan ƙananan, na'ura mai ɗaukar trailer da suka dace da shigar da wurare masu iyaka zuwa manyan dandamali masu motsi da kansu da ke iya kaiwa zurfin fiye da mita 60 tare da ayyukan jet grouting na matakai da yawa. Muhimman bayanan fasaha da ke shafar zaɓin kayan aiki sun haɗa da ƙarfin juyawa (yawanci 50–200 kW), ƙarfin zurfin hakowa, matsa lamba da saurin fitar da famfo, girman bututun hakowa, da kuma ƙimar daidaito don ƙarin nau'ikan ƙasa da yanayin ruwa. Masu kwangila da ke zaɓar masu hakowa na rotary da aka yi amfani da jet grouting suna kimanta buƙatun zurfi, ƙarfin ƙasa da ake sa ran, diamita da tazara na ginshiƙai da ake buƙata, yanayin ruwa, iyakokin shigar da wurare, da kuma saurin samarwa. Kayan aikin dole ne su cika ƙimar matsa lamba da aka bayyana ta EN 12716 (Jet Grouting), EN 1537 (Anchors na ƙasa), da ƙa'idodin ISO 13374 don hanyoyin grouting. Bin ƙa'idodin DIN 4090 da ƙa'idodin ginin ƙasa yana tabbatar da ingancin tsarin da tsaron ma'aikata yayin ayyukan grouting na matsa lamba mai yawa.
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