Ukufakwa kwemikhawulo yokucindezela okuqinile kubonisa indlela ehlakaniphile yokufaka izisekelo esebenzisa umfutho ophakeme ophakathi kwezakhiwo ukuze kudonswe imikhawulo phansi ngaphandle kokugqugquzela noma ukuvutha. Le ndlela ikakhulukazi ibalulekile ezindaweni zedolobha nasezindaweni ezibucayi lapho ukuhlaba umxhwele nokuqhuba imisindo kubeka imikhawulo ezindleleni zokucindezela ezijwayelekile. Inqubo ibandakanya imishini esebenza nge-hydraulic ethokozela uthuli bemikhawulo, isebenzisa umthamo wokuthwala womhlaba kanye nokumelana kokuhambisa ukuze kuthulwe umkhawulo evenini enziwa. Imikhawulo yokucindezela okuqinile ifakwe usebenzisa imishini ethile yokubhola nezinhlelo zokucatshangelwa ezenzelwe ukuhamba phakathi kwezakhamuzi noma ezindaweni zokuhlola, eziqinisekisa umfutho oqhubekayo odingekayo ukuze kuhlangatshezwane nokumelana nomhlaba futhi kufezwe ukuphathwa okucacile kokufakwa. Ukuqedelwa kwezobuchwepheshe kokucindezela okuqinile kudinga ukuhlola kahle indawo nokwakhiwa komhlaba ukuze kutholakale izimo zomhlaba, umthamo wokuthwala, kanye nezindlela ezifanele zokufaka. Abaklami bezisekelo kumele bahlaziye i-geology yangaphansi ngezinhlolovo ze-geotechnical, bephawula amatheku omhlaba, izimo zamanzi angaphansi komhlaba, kanye nanoma yiziphi izithiyo ezingathinta ukufakwa kwemikhawulo. Ukukhethwa kwemishini kuncike ekumelaneni okulindelekile, izidingo zamakhono emikhawulo, kanye nezikhala zesayithi. Izimo zomhlaba ezivamile ezifanele izindlela zokucindezela okuqinile zifaka ama-clays, ama-silts, ama-sands, kanye nohlanga lwe-rock olunamandla aphansi lapho ukumelana nokungena okuhamba phansi kungatholakala ngokwethembeka. Ukucindezela okungaphezulu kube nemiphumela emihle kakhulu ezimweni zomhlaba ezixubile ngokwesilinganiso sephuzu sokuthwala esiphakathi nendawo, lapho ukumelana kokungena kumikhawulo kuhlala kulindeleka futhi kungenziwa ukuphathwa ngesikhathi sokufakwa. Izicelo zokucindezela okuqinile zibandakanya amaphrojekthi ahlukahlukene ezisekelo kuhlanganisa izisekelo zezindwandle, ukwakhiwa kwezakhiwo ezindaweni ezidizayo, umsebenzi wokusekela ezindaweni eziphansi, kanye nezicelo ezikhethekile ezindaweni zempucuko noma ezindaweni ezibucayi kwezemvelo. Le ndlela yokufaka ikhiqiza ukuhamba okuncane komhlaba nokungcoliswa kwemisindo uma kuqhathaniswa namahhambo anomphumela noma imishini ethokozisayo, okuyenza ibe ifanelekile emsebenzini wokuthuthukisa izisekelo ezindaweni ezibuthakathaka, nezikhungo zokuhlala, nezinsiza ezingaphansi komhlaba. Izinhlelo zokucindezela okuqinile zenza ukuba abaqashi bakwazi ukufaka izinhlobo ezahlukene zemikhawulo kuhlanganisa abantu abahlala kwezinsimbi ezisemqoka, imikhawulo ye-concrete ye-preset, kanye nemibono ethile, ekhombisa ukuhamba okujwayelekile ezixazululweni zokwakha. Inqubo yokufaka ephethwe iqinisekisa amakhono okuhlola isikhathi sangempela ngama-load cells kanye nezithuthukisi zokuhamba, ihlinzeka ngokuqinisekiswa okucacile kokufaka kwedwala nasemkhawulweni wempumelelo yokuthwala. Imishini esebenzayo emisebenzini yokucindezela okuqinile ifaka phakathi imishini yokucindezela ye-hydraulic, ama-reaction frames, ama-load cells, ababoni bokuch displacement, kanye neziqukathi ezikhethekile zemikhawulo ezixhumanisa phakathi kwemishini yokucindezela kanye nemikhawulo ye-cap. Izinhlelo ezisebenzayo kakhulu zinezinye izikh.platform ezizenzekelayo ezitholakalayo ezilawula izinga lokulayisha, zilandelela ukumelana kokufaka, futhi ziqopha yonke imininingwane yokufaka ukuze kuqiniswe ukuthi kuthobelana nezinsiza zokwakha nezindinganiso ze-geotechnical engineering. Ukuhlela indawo kudinga amapulatifomu alungile wokubambisana nomphakathi onokwethenjelwa ukuze kuhlangatshezwane nezinsiza ze-reaction, izinhlelo ezilungiselelwe kahle zokuphatha imikhawulo, kanye nabameli abakhokhelwe ukufundiswa kwimisebenzi yokucindezela nokulandelela ukufakwa. Abahlinzeki abasebenzisa ukucindezela okuqinile kumele bahlakulele izinhlelo zezimoto, baqinisekise izinyathelo zokulawula umoya, futhi bagcine amarekhodi anembile okufaka abonisa ukuhambisana nezincwadi zomklamo wezisekelo kanye nezindinganiso ze-geotechnical engineering.
Ukufaka izigaba zepayipi ezihamba phambili kudinga indlela yokufaka ephephile neyizothando ehlanganisa ingcindezi ethile ewusizo nesigaba sokunyakaza esithile sokuhamba ukuze kufakwe ama-payipi okushintsha emhlabathini ngaphandle kokufaka noma ukushintsha. Le ndlela ethuthuke kakhulu ingaphansi kwesigaba esibanzi sokufaka izigaba zepayipi ezithile futhi isebenzisa izinhlelo zokufaka ezinemisebenzi yokuhlola ukuze kufezwe ukufaka phakathi kwezitho zomhlabathi. Isenzo sokuhamba—ukunyakaza okuphindaphindiwe okuqondile okuveliswa ngempahla yokufaka—isusa ukucindezela ngokusebenzisa ibhasi ngaphandle kokuphazanyiswa, okuyenza le ndlela ikhethekile ikakhulukazi ezindaweni zokwakha ezithintekayo. Ngaphezu kwalokho, uma kuqhathaniswa nezindlela zendabuko zokufaka ezisebenzisa i-frequency ne-amplitude, noma ukushaywa okubangelwa njengempempe, ukufaka ezihambayo kabusha kuqhubeka ngokusebenzisa ingcindezi edidiyelwe engezansi ukusiza ukufaka izigaba zomhlaba ngaphandle kokwenza umsindo owandayo, ukunyakaza, noma ukuphazamiseka komhlaba, okwenza kube ukukhetha okulungile kwezimo eziphilayo emiphakathini yasezindlini nasemaphandleni. Ukusetshenziswa kobuchwepheshe bokufaka izigaba ezihambayo kudinga izinhlelo ezikhethekile zokufaka ezibekwe ezitholakalayo noma kumachasis, ezineziqhumiso ze-hydraulic ezikwazi ukuhlinzeka ngengcindezi eqhubekayo engezansi kanye nokunyakaza okuphindaphindiwe okuqondile. Lezi zinhlelo ziqondanisa kahle i-frequency ne-amplitude yokunyakaza ukuze zibe ngcono ekufakeni izigaba ngenkathi zigcina ukuthintwa komthwalo ophakeme phakathi nenqubo yokufaka. Imishini ikhulisa kancane izigaba emhlabathini ngezinga lepressure elihamba phansi—ngokuvamile ukusuka kumakhulu amaningi kuya ezinkulungwaneni zamakilonewton kuya kwimikhiqizo ye-payipi nezimo zomhlaba—nokuhambelana okunciphisa ukucindezela emhlabathini. Le ndlela ikwazi ukuhamba ngempumelelo ezithombeni zomhlaba ezinzima kuhlanganise nesihlabathi esincanyana, ama-gravel, kanye ne-clays eziqinile lapho izindlela ezijwayelekile zokufaka ziqhuba imikhawulo, ngenkathi igwema umsindo nokuthonya kwesakhiwo okuhlobene nezinsimbi zokufaka. Abaphathi bezinhlelo zokufaka bahlola nokuqapha idatha yokuthola izinga langempela kanye ne-penetration resistance ngesikhathi sokufaka, okuvumela ukujwayela okuguquguqukayo kwengcindezi neziqondiso zokunyakaza ngokuya ngempela ngezimo zomhlaba ezitholakele. Ukufaka izigaba ezihambayo kuthola ukusizakala okukukhulu ku-injiniyering yeziqalo zanamuhla emaphakathini edolobha, ikakhulukazi lapho imikhawulo yomsindo, imikhawulo yokunyakaza komhlaba, noma ukujwayela nezakhiwo ezithintekayo kudinga izindlela zokufaka ezihlukile. Le teknoloji ibalulekile ekufakeni ama-payipi ane-diameter enkulu ezindaweni, ezikhumulweni zezindiza, nasezindaweni ezineziphithiphithi ezibhekelwa izimfuno zemvelo nezokuvikeleka kwezakhiwo. Abaklami bakhetha le ndlela kumaphrojekthi adinga ama-payipi amakhulu, ukufaka ama-micropile, izigaba zamabutho, kanye nemisebenzi yokwakha ewuphawu ezimweni zokuhlukahluka zomhlaba ezihlanganisa ama-layer asoft kanye ne-dense. Ukuncipha kokunyakaza okukhuluma uma kuqhathaniswa nezindlela zokufaka zendabuko kwenza ukufaka izigaba ezihambayo kube ukukhetha okuhle ezindaweni ezithintekayo, ezibhedlela, ezinhlelweni zokukhiqiza ezichwepheshile, kanye nezinye izindawo lapho ukulawula ukunyakaza komhlaba kubalulekile. Ukuqondiswa kwalesi senzo ekulawuleni umthwalo nokuhlola i-penetration kuhlinzeka ngokuqinile izinga ledatha yokuma komthwalo, okuvumela abanjiniyela ukuba bahlola ukusebenza kwe-payipi futhi benze izuzi zokusetha izimfanelo ngesikhathi sangempela. Izinhlelo ezihambayo ezweni lwanamuhla zifaka izinsiza ezinobuchwepheshe obuphambili nezici zokulondolozwa kwedatha, kuthokozise ukwakhiwa kwezemfundo kwemibandela yokufaka ukuze kuqinisekiswe izinga eliphakeme lokuqinisekiswa komsebenzi wempumelelo obalulekile emikhakheni yokwakha yanamuhla.
Ukuhlinzeka kokushaywa kwephayili nge-crawler kuyindlela ekhethekile yokuhlinzeka nge-static piling esebenzisa ama-rig wokufaka e-hydraulic angama-crawler kanye nama-hammer avibrating afakwe ezinhlelweni ezihamba phambili ukufaka ama-piles ezisekelweni ngaphandle kokuthonya noma kwezomlilo. Le ndlela yokufaka ethule, ephethwe ngama-vibrations, ibaluleke kakhulu ezindaweni ezincane zokuhlala ezikhaliphile, emakhaya amaningi okukhathalela, nasezifundeni lapho izindlela eziphumelelayo zokushaya ama-pile zingavunyelwe noma zingaphumelelanga. Ukuhlela okwenziwe nge-crawler kuhlinzeka ngokuqhubekela phambili okuhle emhlabeni onzima nezindawo ezithile, kuqhathaniswa nezinsiza zokuhlinzeka zama-pile ezivamile, kukhuthaza abaphathi ukuba baqhubeke ezindaweni ezithambile, ezikhanyayo ezimfushane, nezindawo ezinemigudu ethile nge-phansi okuncane nokuhambisa kwemvelo. Inqubo yokuhlinzeka nge-static press-in piling iqhuba ngokuhlanganisa ingcindezi ye-hydraulic ehlelekile ngokuhambisana nama-frequency avibrating ukuze kufakwe ama-piles e-concrete aqinile noma e-steel phansi kancane. Ngokuhlukile kumaphayili ashayelayo owashaywa ngehammer, izinhlelo zokufaka ze-crawler zigcina impendulo ephansi ngezikhathi zokufaka, okuholela ekuthuthukiseni ikhono lokuthwala nokuqondisa ukuphakama okucacile. Lezi zinsiza zihlola ngesikhathi esifanayo ukumelana kwephayili, ukuhlala komhlaba, kanye namandla okufaka, zivumela abaphathi ukuba baphathe izimo zangaphezulu ngokushesha futhi balungise izakhiwo ezifakiwe ngokufanele. Le ndlela yokusebenza itholakala kahle ezimbonini ezishayelwayo, imifino ehlangana, nezithako zomhlaba ezihlukene lapho ukufaneleka kobumbo kuyaqondakala, njengoba le njini ethanda umthwalo oyinhloko ifakazela ukuhlanganiswa kwephayili nomhlaba phakathi kwe-penetration. Ukuhlinzeko kwe-crawler press-in piling kwenza kube lula ukuhamba ngezimo ezihlukene zomhlaba kusuka kumhlaba othambile nosilika kuya emsandleni onzima nasezinqolobaneni ezincane, kujabulisa ingcindezi ye-hydraulic nokuthileka kwe-vibration ukuhlangabezana nezimo zomhlaba kanye nezidingo zokufaka ama-pile. Le technology ibalulekile ekwakhiweni kwesimo, emaphondweni amanzini, emaphandleni angaphandle komhlaba, nasezindaweni zomphakathi lapho izinhlelo zokuthola umhlaba ziqinile. Izinhlelo zokuthola imvelo, ukwakha kabusha i-brownfield, kanye nezicelo ezithintekayo zomhlaba zincoma kakhulu ukukhiqiza okuhlinzekwayo, njengoba le ndlela inciphisa ukukhiqizwa kwempahla, iphathe izindawo zokuphazamiseka, futhi ivikele ukuhamba kwe-shock kulwakhiwo nezinsiza eziseduzane. Izicelo zifaka phakathi ukwakhiwa kwamaholo aphezulu, izisekelo zezinhlaka kanye neziqukathi, ukuqiniswa kwe-embankment yeloli, izakhiwo zokupaka ezingaphansi, ukufakwa kwezindonga ze-sheet pile, kanye nezinsiza ezikhutshazayo zezimboni ezifuna ukuphuculwa komhlaba okuhlinzekiwe. Ama-rig afakwe ku-crawler ahlanganiswa kahle nezinhlelo zokwakha zesimanje, enza kube lula ukuhamba, ukubeka kahle ezindaweni ezinamaphutha, kanye nokuhlanganiswa kokusebenza okuhambisana nokumba, ukunciphisa amanzi, kanye nezinhlelo zokwakha. Kubakhiqizi bezisekelo ezijulile, ochwepheshe bezinsiza, kanye nezimakethe ezisemkhakheni wezobuchwepheshe, ukuhlinzekwa kwe-crawler press-in piling kumela indlela yokwakha esezingeni eliphezulu, ephathwa ngendlela efanele, futhi enembile yokwakha izisekelo ezihlangabezana nezidingo zokwakha nezobunjiniyela zekhulu le-21.
Ama-prese angabopha amephu ayindlela eyejwayelekile yokufaka ama-pile ezinjini zesisekelo ezijulile, enikeza abaqashi isixazululo esihambisanayo sokusebenza kwe-pile efakwe ngokuthinta ezimweni ezahlukahlukene zomhlabathi. Lezi zinhlelo ze-hydraulic ezikhethekile zifakwe ngqo kwi-rig yokubhoboza ekhona, ama-excavator, noma imishini ethile yesisekelo, avumela abagibeli ukuthi bawafake ngenhloso yokulawula, ngokuqhubekayo izithukuthuku eziqondile ukuze baqede ama-pile emhlabathini ngaphandle kokushayisana noma ukuvuvukala. Le ndlela yokufaka ama-pile ngokuthinta ibe nenzuzo enkulu ezindaweni zokwakha zasemadolobheni lapho indlela yokushaya evamile ibangela umsindo, ukuvuvukala, nokuphazamiseka komhlaba okungamukeleki. Ama-prese angabopha aphezulu ekusebenzelaneni okudingayo umthelela ongamancane endaweni, ukulawula amandla okuhamba, kanye nokunciphisa ubungozi ezakhiweni eziseduze, okwenza kube kufanelekile kakhulu ezindaweni ezibucayi eduze kwezinto ezikhona, izinsiza, noma izindawo ezivikela imvelo. Izinzuzo zokusebenza zama-prese angabopha ziqhamuka ekwazini kwabo ukuhlinzeka ngamandla okuqiniseka okuhlelekile ahlanganiswe umhlabathi kancane njengoba ama-pile eqhubeka, kuholele ekuthuthukisweni kwamandla okuphethe okungaphezu kokuhlangenwe nakho kokushaya okungapheli. Ongcweti bangabheka futhi balungise ukuhlinzekwa kwamasango ngesikhathi sangempela, baphendule ezimweni ezingaphansi komhlaba futhi baqinisekise izinga elihle lokungena. Lezi zinhlelo zisebenza kahle kakhulu kumaphrofayili omhlabathi aphikisayo kuhlanganise izinto ezixakile ezinezinhlaka eziqinile, ama-clays ahlanganisiwe, kanye nezindawo ezixubile zomhlabathi-nhloko lapho izindlela ezisekelwe ekuvuvukaleni zingase zibe neziwombe noma zezinkinga. Umshini we-hydraulic press uvumela ukuyalwa kwesigaba, ukuhlolwa komthwalo ngesikhathi sokufaka, nokuvumelanisa nesikhala esiguqukayo sokungena njengoba ama-pile ahlangabezana nezendlalelo ezahlukene ze-geological. Ukufakwa kwezisekelo ezijulile ngama-prese angabopha kudinga ukukhetha ngokucophelela imishini ehlinzeka ngesisekelo sokusingatha umthwalo owengeziwe futhi inikeze izinsiza ezizinzile. Ama-prese asebenzisa isisindo nokwakheka kwezinsiza ezincane—kungaba yi-rig enkulu yokubhoboza, i-excavator enkulu, noma umjikelezo ophumelelayo—ukuveza amandla okuphakathi adingekayo ukuze ama-pile angene. Ukuhlolwa komhlaba kanye nohlolojikelele lwezobuchwepheshe kumqoka kakhulu ekukhetheni uhlobo lwephezulu, imithwalo elindelekile yokufaka, kanye nezinga lokungena elinokwenziwa ezimweni zomhlaba ezilindelekile. Izicelo ezivamile zifaka ukufakwa kwe-casing okuncane, ukuhamba kwe-H-pile stainless, kanye nomthwalo we-pile ye-concrete eyenziwe ngaphambi kokwakha ezinhlelweni ezihlukahlukene ezivela ezakhiweni zesizinda, ukuhamba kwezindonga, kuya ezinhlelweni zokuxhasa izakhiwo. Le ndlela inikeza izinzuzo ezibalulekile zokuhlonza ikhwalithi nokwenza ngcono ukusebenza kwesakhiwo, njengoba ukuhlinzekwa kokulawulwa kokutholwa nokulawulwa kokufakelwa kuvumela ukuqinisekiswa kokujula kokufakwa, izici zokuphatha umthwalo, kanye nempendulo yomhlaba ngesikhathi sokufaka ama-pile. Kubathengisi beziseko ezijulile abakhethekile ezindaweni eziphikisayo zasemadolobheni, izimo zomhlaba eziguqukayo, kanye nezinhlelo ezinomkhawulo oqinile wokuvikelwa kwemvelo noma kwezokwakha, ama-prese angabopha amamodeli akhulu futhi aphumelelayo esigxotsheni sokufaka ama-pile sekuvele nje kuphela ezimakethe zezimoto zesizinda.
Imishini encedisayo yokufaka amaphiko ibalulekile emkhakheni wezinsiza ezikhethekile nezinhlelo ezidingekayo ukuze kuphumelele ukuhlanganiswa kwezinhlelo zokufaka amaphiko ezindaweni ezijulile. Lezi zinhlelo zokwesekwa zisebenza ngokuhlanganyela nezinsiza ezisemqoka zokufaka amaphiko nemishini yokukhipha ukuze kuqinisekiswe ukufakwa kwepali okuyiqonda, okuphezulu kokunemba ezimweni ezahlukahlukene ze-geotechnical. Ubuchwepheshe bokufaka amaphiko buye baphumelela kakhulu kwezokwakha zanamuhla ngenxa yokuhamba okuphansi nokuthinta okuncane kwemvelo uma kuqhathaniswa nezindlela zokufaka ezishaywayo zendabuko. Imishini encedisayo ihlanganisa izinhlelo zokuphendula, amadivayisi wokulinganisa umthwalo, units zamandla e-hydraulic, abalandeli bamaphiko, amathuluzi okwenza, izikhumbuzo zoku guía, kanye nezinsiza zokuhlola eziqinisekisa ukufakwa kwepali okuphephile, okusebenza kahle, nokunembile. Ubuciko nokwethembeka kwalemishini encedisayo kuthinta ngqo ukukhiqizwa kwemisebenzi, izindinganiso zokuphepha, kanye nekhono lokusebenza ezindaweni zokwakha ezithintekayo ngezwi noma eduze kwezinsiza ezikhona. Izinhlelo zokufaka amaphiko eziphakeme zifaka phakathi izinhlelo zomphakathi, zokuhweba, ezokwakha amabhuloho, kanye nezinhlelo zezimboni lapho ukulawula nokulinganisa okuqanjiwe kubalulekile. Imishini encedisayo ejwayelekile ifaka phakathi amajaka e-hydraulic abhebha umphumela wokuphendula, amaseli emithwalo ukuze kuqinisekiswe izindlela zokufaka, abalandeli bamaphiko nabahlanganisi abakugcina bephakeme ngesikhathi sokufaka, abacibisi bamaphiko bokwenza izigaba ezithile, kanye nezinhlelo zokulawula ezihambisanayo ezihlanganisa amajaka amaningi nezinsiza. Ezimweni zomhlabathi eziyinqaba njengezindawo ezijulile ezinqabile, imicu yegqubu noma izakhiwo ezixubile zemiqondo, imishini encedisayo kufanele iklanywe ukuze ibe namandla aphezulu kuyilapho igcina ukunemba kokuma. Ukuvumelana phakathi kwezinjini ezisemqoka nemishini encedisayo kubalulekile, njengoba lezi zingxenye kufanele zisebenze ngokuhlanganyela ukuze ziqaphe ukuvimbela, ukusabalalisa umthwalo, nokunemba kokufaka ngesikhathi sokufaka amaphiko. Izimo zomhlaba zithinta kakhulu ukukhetha nokwakhiwa kwemishini encedisayo. Ama-clay anqabile, izihlabathi ezinefriction yangaphakathi ephezulu, itshe elikhanyayo, nezindonga zefayili eziqinile zidinga izinhlelo ezinemininingwane ezinamandla ahlali ephakeme kuyilapho zinikeza impendulo yomthwalo eqhubekayo. Imishini encedisayo yanamuhla ifaka phakathi ama-sensor kagesi, ama-transducer wok pressure, kanye nezinhlelo zokuthola idatha ezithumela ulwazi olwangempela ezikhungweni zokulawula, okuvumela abasebenzi ukuthi benze izinqumo zomzuzwana mayelana nezinga lokufaka nezilungiselelo zamandla. Izinhlelo zokuhola nabalandeli zigcina ubungako nokuhlangana, okuyizimpawu ezibalulekile ezivimbela ukuflakwa kwamaphiko futhi ziqinisekisa ukusebenza komumo. Imishini kufanele ikwazi ukuhlinzeka ngezinhlelo ezihlukahlukene zamaphiko, ukuhlela, nezindidi zokufaka, kudinga ukuthi kube nezixhumi ezijwayelekile nezinhlelo eziphumelelayo ezihlanganisa izidingo ezihlukene zomsebenzi. Ukuhlanganiswa kwemishini encedisayo ethuthukisiwe ezinhlelweni zokufaka amaphiko kuthuthukisa ukuphepha endaweni yokusebenza, ukuhambisana kwemvelo, nokuthembeka kokuhlelwa kokwakha. Izinhlelo eziphelele zokuhlola zinciphisa ukungaqiniseki mayelana namandla epali kanye nekhwalithi yokufaka, zinikeza idatha ye-geotechnical edingekayo ukuze kuqinisekiswe ubuchwepheshe bokwakha. Lezi zinhlelo zibaluleke kakhulu ezindaweni ezixakile zomphakathi, ezindaweni ezithintekayo zezakhamuzi zomlando, kanye nezindawo ezinokukhaderna lapho ukulawula ukuhamba kungenakuphikiswa. Imishini encedisayo esebenzayo iyasiza ekwenzeni imisebenzi, inciphisa isikhathi sokusebenza kwemishini, futhi ifaka ukusizakala kwepali ngokushesha epheleni kwezinhlelo ezinkulu zokwakha izisekelo. Njengoba ukufaka amaphiko kuqhubeka nokwandisa imali yawo emakethe yokwakha ezindaweni ezijulile, isidingo semishini encedisayo ethembekile, eyinkimbinkimbi sahlala sikhulu emikhakheni yokwakha ehlaba umxhwele.
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