Ikhanda le-anchor liyingxenye ebalulekile yokuthwala load kumasistimu e-prestressed tieback, lisebenza njengesixhumanisi esiyinhloko phakathi kwekhebula noma umjovo owenziwe ngaphambi kokufaka, kanye nenhlaka yomhlaba. Ngokuvamile yakhiwe stini enamandla aphezulu, ikhanda le-anchor lisebenza njengendawo yokuthwala edlulisela izixhumanisi ezibhelelayo phezu kwesikhala esibanzi, ivimbela ukuphuka okuhloswe kuyo kokuthwala nokwehla kwemathiriyali. Le ngxenye iklanywe ukuz withstand ukuhamba okuyinhloko okuqhubekayo ngesikhathi igcina ubudlelwano obuqinile nendawo yomhlaba eqinile noma izinhlelo zokuphendula ze-concrete ezididiyelwe. Ubuchwepheshe nemininingwane yamakhanda e-anchor kubalwa kahle ngokwesilinganiso esibhekiwe sokukhanya, kuqinisekisa ukusatshalaliswa kwe-load okuhle nokusebenza kokwakha okwesikhathi eside ezinhlelweni ezinzima zokusebenza kwezobuchwepheshe. Amakhandekiso e-anchor ayizinto ezibalulekile kumaphrojekthi amaningi e-deep foundation kanye ne-engineering ye-geotechnical. Ekwakhiweni kwemagquma, ikakhulukazi ezakhiweni eziqhubekayo ezibhekene nemithwalo yezweleni ehlangothini nasamanzi, amakhandekiso e-anchor anamathela kumasistimu e-prestressed tiebacks anika ukweseka okuhlangothini futhi avimbele ukunyakaza kwebhodi. Athandwa kakhulu emaphrojekthini wokuhlola izixhumanisi, lapho amazinga ambalwa e-tieback ahlinzekwa ngekhandekiso le-anchor asebenza ndawonye ukuvusa amandla e-landslide nokugcina ukujula kwendawo isikhathi eside. Ukusekela kokuhlanza okungaphansi, kuhlanganisa nezikhungo zezinqaba, izinqaba ze-subway, kanye nezikhungo zokupaka eziphansi, relied on systems ye-anchor head ukuqinisa imingcele yokwakha yesikhashana nephakeme kanye nezindonga ze-soldier pile. Ngaphezu kwalokho, amakhandekiso e-anchor adlala izindima ezibalulekile ekuqhamukeni kwezimvula, ukusizakala kokuncipha ezindaweni zokumba, nokulondolozwa kwezikhumbuzo ezidlula ukufaka. Amakhandekiso e-anchor ajwayelekile anikezwa njengengxenye enziwe ngensimbi efika endaweni yephrojekthi ilungele ukufakwa. I-surface yokuthwala iyathuthukiswa ngokucophelela ukuze kuqinisekiswe ukuxhumana okufanele nezakhiwo ezingaphenduli, kanti isixhumanisi—kukhona kuphumelele indawo olokhu ikhuza—sanikeza ikhebula lama-prestressed noma umjovo. Ukufakwa kudinga ukusabalalisa kahle nezinhlinzeko zokuthi ipuleti lokuthwala lihlale lilingana nophenyo lwe-load, kunciphisa ukulayisha okungajwayelekile. Le ngxenye kumele ivikelwe ekuphuleni phakathi kokuxhumana ngamapulani afanele, kuhlanganisa nezinhlelo zokuvikela ngaphansi kokuhamba okushisayo noma izinhlelo zokufaka i-epoxy, ikakhulukazi ezimweni ezinomthelela omubi ezifana nezindawo ezikhaleni noma umhlabathi ochithwe kemikhakha. Amakhandekiso e-anchor atholakala kumazinga ahlukahlukene kanye nemithwalo, ngokuvamile aphakathi kuka-500 kN kuya kweziningi ezinkulu eziningi, kuye ngezimfuno zephrojekthi. Amazinga ensimbi ajwayelekile aqukethe i-ASTM A36, A572, noma izikhumbuzo ezihambisanayo zase-Yurophu, zikhethwe ukuhlinzeka ngokuqina okufanele nokuqina okuhle. Imininingwane yobukhulu bepuleti yokuthwala neminyaka iyaklanywa ngokukhethekile ngaphansi kokufakwayo, ibheka ukukhanya okukhululiwe, ukukwazi kwezindawo, kanye nezimpawu zendawo zokuphendula. Izinhlobo ezikhethekile zibandakanya amakhandekiso e-bonded anchor ukuze kube ne-systems eziqinisekiswe okwangempela nokwakhiwa kwamakhandekiso e-anchor agqokwe ukukhipha ngemva kokutholwa. Ukukhetha amakhandekiso e-anchor afanele kudinga ukuhlaziywa okujulile kwezimo ze-geotechnical, ubukhulu bokukhanya, ukuviwa kwemvelo, kanye nezidingo zokwakha. Abaphenyi kumele bahlaziye ukukwazi komhlaba, imithi ye-samanzi, ukujula okulindelekile, kanye nezinye izinto eziphusayo. Imininingwane yokukhanda ikhandekiso le-anchor kumele ihambisane nokwakhiwa kwekhebula, ububanzi bemijovo, kanye nezinhlaka zomzimba ze-tieback ukuze kuqinisekiswe ukufanisana phakathi kwekhono namapulani. Ukufakwa nokusebenza kwezinhlelo zamakhandekiso e-anchor kumele kuhlangane nezindinganiso zomhlaba wonke kubandakanya i-EN 581, ISO 14518, ASTM E8, kanye nemithetho ye-geotechnical ethile yezwe, kuqinisekisa ukuqina kwesakhiwo kanye nokuhlala isikhathi eside ezimweni ezihlukahlukene zemvelo nezomhlaba.
Ikhanda le-anchor liyingxenye ebalulekile yokuthwala load kumasistimu e-prestressed tieback, lisebenza njengesixhumanisi esiyinhloko phakathi kwekhebula noma umjovo owenziwe ngaphambi kokufaka, kanye nenhlaka yomhlaba. Ngokuvamile yakhiwe stini enamandla aphezulu, ikhanda le-anchor lisebenza njengendawo yokuthwala edlulisela izixhumanisi ezibhelelayo phezu kwesikhala esibanzi, ivimbela ukuphuka okuhloswe kuyo kokuthwala nokwehla kwemathiriyali. Le ngxenye iklanywe ukuz withstand ukuhamba okuyinhloko okuqhubekayo ngesikhathi igcina ubudlelwano obuqinile nendawo yomhlaba eqinile noma izinhlelo zokuphendula ze-concrete ezididiyelwe. Ubuchwepheshe nemininingwane yamakhanda e-anchor kubalwa kahle ngokwesilinganiso esibhekiwe sokukhanya, kuqinisekisa ukusatshalaliswa kwe-load okuhle nokusebenza kokwakha okwesikhathi eside ezinhlelweni ezinzima zokusebenza kwezobuchwepheshe. Amakhandekiso e-anchor ayizinto ezibalulekile kumaphrojekthi amaningi e-deep foundation kanye ne-engineering ye-geotechnical. Ekwakhiweni kwemagquma, ikakhulukazi ezakhiweni eziqhubekayo ezibhekene nemithwalo yezweleni ehlangothini nasamanzi, amakhandekiso e-anchor anamathela kumasistimu e-prestressed tiebacks anika ukweseka okuhlangothini futhi avimbele ukunyakaza kwebhodi. Athandwa kakhulu emaphrojekthini wokuhlola izixhumanisi, lapho amazinga ambalwa e-tieback ahlinzekwa ngekhandekiso le-anchor asebenza ndawonye ukuvusa amandla e-landslide nokugcina ukujula kwendawo isikhathi eside. Ukusekela kokuhlanza okungaphansi, kuhlanganisa nezikhungo zezinqaba, izinqaba ze-subway, kanye nezikhungo zokupaka eziphansi, relied on systems ye-anchor head ukuqinisa imingcele yokwakha yesikhashana nephakeme kanye nezindonga ze-soldier pile. Ngaphezu kwalokho, amakhandekiso e-anchor adlala izindima ezibalulekile ekuqhamukeni kwezimvula, ukusizakala kokuncipha ezindaweni zokumba, nokulondolozwa kwezikhumbuzo ezidlula ukufaka. Amakhandekiso e-anchor ajwayelekile anikezwa njengengxenye enziwe ngensimbi efika endaweni yephrojekthi ilungele ukufakwa. I-surface yokuthwala iyathuthukiswa ngokucophelela ukuze kuqinisekiswe ukuxhumana okufanele nezakhiwo ezingaphenduli, kanti isixhumanisi—kukhona kuphumelele indawo olokhu ikhuza—sanikeza ikhebula lama-prestressed noma umjovo. Ukufakwa kudinga ukusabalalisa kahle nezinhlinzeko zokuthi ipuleti lokuthwala lihlale lilingana nophenyo lwe-load, kunciphisa ukulayisha okungajwayelekile. Le ngxenye kumele ivikelwe ekuphuleni phakathi kokuxhumana ngamapulani afanele, kuhlanganisa nezinhlelo zokuvikela ngaphansi kokuhamba okushisayo noma izinhlelo zokufaka i-epoxy, ikakhulukazi ezimweni ezinomthelela omubi ezifana nezindawo ezikhaleni noma umhlabathi ochithwe kemikhakha. Amakhandekiso e-anchor atholakala kumazinga ahlukahlukene kanye nemithwalo, ngokuvamile aphakathi kuka-500 kN kuya kweziningi ezinkulu eziningi, kuye ngezimfuno zephrojekthi. Amazinga ensimbi ajwayelekile aqukethe i-ASTM A36, A572, noma izikhumbuzo ezihambisanayo zase-Yurophu, zikhethwe ukuhlinzeka ngokuqina okufanele nokuqina okuhle. Imininingwane yobukhulu bepuleti yokuthwala neminyaka iyaklanywa ngokukhethekile ngaphansi kokufakwayo, ibheka ukukhanya okukhululiwe, ukukwazi kwezindawo, kanye nezimpawu zendawo zokuphendula. Izinhlobo ezikhethekile zibandakanya amakhandekiso e-bonded anchor ukuze kube ne-systems eziqinisekiswe okwangempela nokwakhiwa kwamakhandekiso e-anchor agqokwe ukukhipha ngemva kokutholwa. Ukukhetha amakhandekiso e-anchor afanele kudinga ukuhlaziywa okujulile kwezimo ze-geotechnical, ubukhulu bokukhanya, ukuviwa kwemvelo, kanye nezidingo zokwakha. Abaphenyi kumele bahlaziye ukukwazi komhlaba, imithi ye-samanzi, ukujula okulindelekile, kanye nezinye izinto eziphusayo. Imininingwane yokukhanda ikhandekiso le-anchor kumele ihambisane nokwakhiwa kwekhebula, ububanzi bemijovo, kanye nezinhlaka zomzimba ze-tieback ukuze kuqinisekiswe ukufanisana phakathi kwekhono namapulani. Ukufakwa nokusebenza kwezinhlelo zamakhandekiso e-anchor kumele kuhlangane nezindinganiso zomhlaba wonke kubandakanya i-EN 581, ISO 14518, ASTM E8, kanye nemithetho ye-geotechnical ethile yezwe, kuqinisekisa ukuqina kwesakhiwo kanye nokuhlala isikhathi eside ezimweni ezihlukahlukene zemvelo nezomhlaba.