Amathubu e-grout abalulekile ezinhlelweni zokufakwa kwemikhono ephephile ye-grout ye-premium kanye nezixhumi, aklanyelwe ukuhambisa i-grout echithwayo ukusuka ebusweni iye ebholeni lesixhumi ukuze kufezwe isixhumi esihle kanye nokuhanjiswa kwemithwalo. Lama tubi ajwayele ukwenziwa ngepolyethylene ephezulu (HDPE), PVC, noma izinsiza zeplastiki eziqinile, ezakhiwe ukuze zikwazi ukumelana nomfutho we-hydrostatic owakha ngesikhathi sokusebenza kwe-grouting ngenkathi zigcina ukuma kwemilinganiselo. Amathubu anokwakheka okuvalekile enevavulo lokuletha kumphumela wokugcina, ivumela ukugeleza kwe-grout okuphumile endaweni yesixhumi ngenkathi ivimbela ukugeleza kwemathiriyali ngesikhathi sokufaka umfutho nokuhlungwa kwesixhumi. Ezinhlelweni ze-tieback eziphakanyisiwe, itheku le-grout lisebenza njengesixhumanisi esibalulekile phakathi kwezinsiza zokufaka i-grout ebusweni kanye nesixhumi sokukhanda esibekwe emphakathini omuhle noma emathafeni ezindilinga. Ngesikhathi sokufakwa, itheku libekwe emaphakathi ngaphakathi ebholeni lisondelene nesixhumi sokuhlanza, bese liphathwa ngosawoti we-cement wokufaka—ngokuvamile kuhlangene nesikhumulo esiphasheki, ukuthola ukugxila okujule phakathi kwekhefu kanye ne-matrix yomhlaba ezungezile. Le nqubo ye-grouting ibalulekile ekusebenzeni kwe-tieback, njengoba ithinta ngqo amandla obond, ukuvikelwa kwe-corrosion kwezinsimbi ze-prestress, kanye nezinga lesistimu lokuhanjiswa kwemithwalo isikhathi eside ezinhlelweni ezihlala njalo noma ezesikhashana ezifana nokwesekwa kokumba okujulile, ukuzinza kwemithombo yokubamba, ukuvimbela ukuhuhumuka, kanye nokuxhaswa kwezitezi. Amathubu e-grout anikezwa kumabanga ajwayelekile (ngokuvamile 1.0–1.5 amamitha) anama coupler axhunywe ngokushesha, avumela ukuhlanganiswa emhlabeni kube izintambo eziqhubekayo ezihlelwe ngokuvumelana nezidingo zedethi ye-anchor, imvamisa ezenzeka ngama-5–50+ amamitha ezindaweni ezingaphansi komhlaba. Kufanele agcinwe ezimeni ezomile, ezifakwe, ukuze kugwenywe ukuwa noma ukuhluleka kwe-UV ngaphambi kokusetyenziswa. Endaweni yokwakha, ukufakwa kudinga ukuphathwa kahle ukuze kugwenywe ukujova noma ukumadlayo, okusho ukuthi kuhamba kahle namandla okuphuma, futhi kungabamba amaphakheji we-oyile avusa ubuthakathaka endaweni yesixhumi esifakwe i-grout. Izinhlobo eziyinhloko zihlanganisa amathubu anendawo eyodwa (anikezela nge-grout endaweni eyodwa), amathubu anama-port amaningi (ane-perforations ubude bawo ukuze kuhlangane palabalalu emikhono emide), kanye nezindwangu noma ama-stoppers ukuvala izingxenye ezithile ngesikhathi sokugrout. Izigaba ezivame ukuhlinzekwa zibhekisela ububanzi be-tube (ngokuvamile 2–4 mm), ububanzi bokungena (8–16 mm), kanye nomfutho ophezulu ofanele (uvame ukuba ngu-25–40 bar ngesikhathi sokugrout). Izinketho zezakhiwo kubabuili zifaka ubude besixhumi kanye nobubanzi be-borehole, umfutho we-grouting owidingayo kanye nezinga lokugeleza, isikhephe somhlaba, kanye nespecification ye-cement grout. Ezimeni ezinzima—njengokwephela, umhlabathi onamatshe, noma ukufakwa isikhathi eside—amathubu anama-walls avulekile, aqinile avimbela ukuwa futhi aqinisekisa ukuhamba kwe-pressures okukhululekile. Ezindaweni zasolwandle noma ezimeni ezinzima zezikhemikhali, izinto ezivikelekile ze-corrosion kanye ne-jacketing yokuvikela ingase ibekwe. Izindinganiso ezihlobene ezilawula ukukhetha amathubu e-grout nezindlela zokugrout zifaka i-EN 1537 (Izixhumi Zomhlaba), i-ASTM D4435 (Iterminology ye-Premarin Prestressed Concrete Strand), kanye ne-ISO 23934 (Ukwenziwa kanye Nokuhlolwa Kwe-Geotechnical—Izixhumi Zomhlaba ezikhulisiwe). Lezi zindinganiso ziqinisekisa izinga lempahla, izindlela zokwakha, kanye nezinhlelo zokuhlola umoya ukuze kuqinisekiswe ukusebenza kokuxhumi nokuphepha ezindaweni ezibalulekile zokwakha ezijulile.
Amathubu e-grout abalulekile ezinhlelweni zokufakwa kwemikhono ephephile ye-grout ye-premium kanye nezixhumi, aklanyelwe ukuhambisa i-grout echithwayo ukusuka ebusweni iye ebholeni lesixhumi ukuze kufezwe isixhumi esihle kanye nokuhanjiswa kwemithwalo. Lama tubi ajwayele ukwenziwa ngepolyethylene ephezulu (HDPE), PVC, noma izinsiza zeplastiki eziqinile, ezakhiwe ukuze zikwazi ukumelana nomfutho we-hydrostatic owakha ngesikhathi sokusebenza kwe-grouting ngenkathi zigcina ukuma kwemilinganiselo. Amathubu anokwakheka okuvalekile enevavulo lokuletha kumphumela wokugcina, ivumela ukugeleza kwe-grout okuphumile endaweni yesixhumi ngenkathi ivimbela ukugeleza kwemathiriyali ngesikhathi sokufaka umfutho nokuhlungwa kwesixhumi. Ezinhlelweni ze-tieback eziphakanyisiwe, itheku le-grout lisebenza njengesixhumanisi esibalulekile phakathi kwezinsiza zokufaka i-grout ebusweni kanye nesixhumi sokukhanda esibekwe emphakathini omuhle noma emathafeni ezindilinga. Ngesikhathi sokufakwa, itheku libekwe emaphakathi ngaphakathi ebholeni lisondelene nesixhumi sokuhlanza, bese liphathwa ngosawoti we-cement wokufaka—ngokuvamile kuhlangene nesikhumulo esiphasheki, ukuthola ukugxila okujule phakathi kwekhefu kanye ne-matrix yomhlaba ezungezile. Le nqubo ye-grouting ibalulekile ekusebenzeni kwe-tieback, njengoba ithinta ngqo amandla obond, ukuvikelwa kwe-corrosion kwezinsimbi ze-prestress, kanye nezinga lesistimu lokuhanjiswa kwemithwalo isikhathi eside ezinhlelweni ezihlala njalo noma ezesikhashana ezifana nokwesekwa kokumba okujulile, ukuzinza kwemithombo yokubamba, ukuvimbela ukuhuhumuka, kanye nokuxhaswa kwezitezi. Amathubu e-grout anikezwa kumabanga ajwayelekile (ngokuvamile 1.0–1.5 amamitha) anama coupler axhunywe ngokushesha, avumela ukuhlanganiswa emhlabeni kube izintambo eziqhubekayo ezihlelwe ngokuvumelana nezidingo zedethi ye-anchor, imvamisa ezenzeka ngama-5–50+ amamitha ezindaweni ezingaphansi komhlaba. Kufanele agcinwe ezimeni ezomile, ezifakwe, ukuze kugwenywe ukuwa noma ukuhluleka kwe-UV ngaphambi kokusetyenziswa. Endaweni yokwakha, ukufakwa kudinga ukuphathwa kahle ukuze kugwenywe ukujova noma ukumadlayo, okusho ukuthi kuhamba kahle namandla okuphuma, futhi kungabamba amaphakheji we-oyile avusa ubuthakathaka endaweni yesixhumi esifakwe i-grout. Izinhlobo eziyinhloko zihlanganisa amathubu anendawo eyodwa (anikezela nge-grout endaweni eyodwa), amathubu anama-port amaningi (ane-perforations ubude bawo ukuze kuhlangane palabalalu emikhono emide), kanye nezindwangu noma ama-stoppers ukuvala izingxenye ezithile ngesikhathi sokugrout. Izigaba ezivame ukuhlinzekwa zibhekisela ububanzi be-tube (ngokuvamile 2–4 mm), ububanzi bokungena (8–16 mm), kanye nomfutho ophezulu ofanele (uvame ukuba ngu-25–40 bar ngesikhathi sokugrout). Izinketho zezakhiwo kubabuili zifaka ubude besixhumi kanye nobubanzi be-borehole, umfutho we-grouting owidingayo kanye nezinga lokugeleza, isikhephe somhlaba, kanye nespecification ye-cement grout. Ezimeni ezinzima—njengokwephela, umhlabathi onamatshe, noma ukufakwa isikhathi eside—amathubu anama-walls avulekile, aqinile avimbela ukuwa futhi aqinisekisa ukuhamba kwe-pressures okukhululekile. Ezindaweni zasolwandle noma ezimeni ezinzima zezikhemikhali, izinto ezivikelekile ze-corrosion kanye ne-jacketing yokuvikela ingase ibekwe. Izindinganiso ezihlobene ezilawula ukukhetha amathubu e-grout nezindlela zokugrout zifaka i-EN 1537 (Izixhumi Zomhlaba), i-ASTM D4435 (Iterminology ye-Premarin Prestressed Concrete Strand), kanye ne-ISO 23934 (Ukwenziwa kanye Nokuhlolwa Kwe-Geotechnical—Izixhumi Zomhlaba ezikhulisiwe). Lezi zindinganiso ziqinisekisa izinga lempahla, izindlela zokwakha, kanye nezinhlelo zokuhlola umoya ukuze kuqinisekiswe ukusebenza kokuxhumi nokuphepha ezindaweni ezibalulekile zokwakha ezijulile.