I-Micropiling kanye ne-anchoring imele izixazululo ezikhethekile zokwakha izisekelo ezijulile eziklanyelwe ukuvuselela nokuphakamisa izakhiwo ezimweni zomhlaba ezinzima lapho izindlela zokwakha ezijwayelekile zingezinhle. Ama-micropiles, azwiwa nangokuthi ama-minipiles noma ama-pin piles, yizinto ezincane zokwakha ezijulile ezithombeni ezivamile ezitholakala phakathi kuka-75mm no-300mm ububanzi. Lezi zinhlelo eziwusizo zisebenza kahle ezicini ezidinga amandla amakhulu ezindaweni ezincane, izimo zomhlabathi ezithambile, noma ezakhiweni ezikhona ezinendawo yokuhlala encane. Izinhlelo ze-anchoring, kuhlanganisa ama-soil anchors, ama-rock anchors, kanye nezinhlelo zokubopha, zidhambisa ukuvimbela okujolile nokuvikela amandla okuphakama ezakhiweni ezibhekene nokulayisha okujoliwe, imisebenzi ye-seismic, noma ukucindezelwa kwemvelo. Ngokuhlanganyela, lezi zindlela zivumela abatechisi ukuthi babhekane nezinkinga ezinzima ze-geotechnical lapho imikhono ejwayelekile yokubeka noma izisekelo eziphathekayo zingakwazi ukuhlinzeka ngempumelelo efanelekile noma ukufaneleka kokuphepha. Indlela yokusebenza ye-micropiling kanye ne-anchoring ibandakanya ukudonsa ngosizo, ukulungiselela ngemfanelo izikhumbu, kanye nezindlela zokugrouta ezilawulwayo ukuze kuqinisekiswe ukudluliselwa kokwakha okuhle phakathi kwesakhiwo nezingxenye zomhlaba noma obhontshisi abaseduze. Ama-micropiles asebenza kahle nge-skin friction kanye ne-end bearing, futhi amandla akhula ngokuxhomekeka kububanzi bezikhumbu, amandla egwout, kanye nekhwalithi yesikhala somhlaba esiseduze. Ukufakwa kudinga imishini yokudonsa ethile eyakwazi ukusebenza ezindaweni ezinokufinyelela okulinganiselwe, phezu kwamanzi, noma phakathi kwezindawo ezikhona. Izinhlelo ze-anchoring nazo zidinga izinsiza zokudonsa ezikhethekile kanye nemishini yokunciphisa ukuze kuqinisekiswe ukufaka ama-anchors ezimweni ezinhle nasemazingeni afanele, kuqinisekisa ubude obanele bokufaka emhlabathini noma obhontshisi obuqinile. I-grouting, noma iyiphi indlela yokusebenza, ivamise ukuba nemiphumela ebucayi ekusebenzeni okuphakathi nendawo nasekuqiniseni kokubili ama-micropiles kanye nama-anchors. I-Micropiling kanye ne-anchoring ibalulekile ezicini ezifaka phakathi ukwakhiwa kwezakhiwo ezindala nakakhulu, ukuvuselela izikhala zokumba, ukugcinwa kwezinyathelo zomgwaqo, ukulungiswa kwezakhiwo ze-seismic, kanye nezinhlelo zokulungisa izisekelo ezindaweni ezinomhlabathi ophukile noma ochithekayo. Lezi zindlela zihlala zihambisana nezimo ezihlukahlukene zomhlaba ukusuka kumasepha amanzi kanye ne-silt kuya kum sand ebanzi, itshe elahlile, kanye nesigxobo esiqinile, kanti ukwakhiwa kuqanjwa kahle ukuze kuhlangabezane nezimo ze-geotechnical zendawo kanye nezidingo zokulayisha. Ukuphazamiseka kwemvelo njengezikhala ezithintekayo, imikhawulo yezinga, noma umhlaba ogcwele kuwenza kube izinhlelo ze-micropiling kanye ne-anchoring ezifanele ukuhlinzeka ngendlela yokushaya noma ukuyisa phansi. Eziphakameni zokwakha zasemadolobheni, ukuthuthukiswa kwezakhiwo, kanye nemisebenzi yokulungisa izisekelo, lezi zindlela eziyinkimbinkimbi zinikeza ukuphuculwa kwezakhiwo ngaphandle kokuphazamiseka okukhulu kwesizinda nezikhathi zokwakha ezichithiwe. Ukukhethwa kwemishini—kusukela kumarotary drilling rigs kanye nezinhlelo ze-auger kuya kumasistimu we-hydraulic tensioning kanye nezicell zokulayisha—kubalulekile ekwakheni ikhwalithi, ukuphepha, kanye nezindleko zokusebenza. Ukwakha kahle, ukufaka, kanye nokulawulwa kwekhwalithi kwe-micropiling kanye nezinhlelo ze-anchoring kudinga ukuhamba kokuqhathaniswa phakathi kwabatechisi be-geotechnical, abaqashi bezinsiza zokudonsa, kanye nochwepheshe bemishini. Ukuhlola kwezimpahla, ukusho kwe-grouting, nezinsizakalo kuqinisekisa ubumsulwa bezinhlelo ze-system kuyo yonke inqubo yokwakha. Njengoba ukuthuthukiswa kwezakhiwo zasemadolobheni kuthuthuka futhi izimo zomhlaba ziba nzima, ubuchwepheshe bangempela be-micropiling kanye ne-anchoring b continues ukuhamba phambili indima yabo kwi-engineering ye-deep foundation yanamuhla, behlinzeka ngamasu athembekile ezinhlelweni ezinzima lapho izindlela zokwakha ezijwayelekile zihluleka.
Ukudrillwa kwe-ankhoro kuyindlela ebalulekile kwezobunjiniyela be-geotechnical esetshenziselwa ukufaka ama-ankhoro emhlabeni aqinisa izakhiwo ukuze avikeleke kumandla aphambene, imijikelezo yokuphumula, nemithwalo yokuphakamisa. Lezi zinkinga, ezifakwe ngaphakathi phansi ezindaweni ezinamandla zomhlaba noma emathafeni, ngokusebenzisa ukudrillwa okuqondile, zakha uxhumano oluphilayo noma olungaphili olubalulekile lwezindonga zokugcina, izinqaba eziphansi, amapulatifomu angaphansi, kanye nezinhlelo zokuhlakulela izingxenye. Ngemboni yokwakha izisekelo ezijulile, udonga lwezinkinga lunikeza indlela eyinhloko ngaphakathi kwohlobo olukhulu lwe-micropiling ne-anchoring, lunezixazululo ezakhiwe lapho izisekelo ezijwayelekile zingakwazi ukumelana kahle nemithwalo ephambene noma yokuxhumana. Le ndlela ibandakanya ukudrillwa kwemigudu kuya ezindaweni ezithile, ukufakwa kwezakhiwo ze-ankhoro, nokufaka umthwalo olawulwayo ngezisombululo ze-hydraulic ukuze kuhlanganyele nezindawo zokuhlala ezizinzile nokudlulisela izithwalo ngokuphephile phakathi kwempahla yomhlaba neziqu eziphakeme. Inqubo yokufaka i-ankhoro isebenzisa izinsiza zokuqhuba ezikhethekile ezikwazi ukungena ezimweni ezihlukahlukene zomhlaba neziqu ngokucacile nangokulawula. Izinsiza zokudrillwa ezishintshashintshayo, ama-hammer aphukisayo, kanye nezinhlelo zokudrillwa eziphathekayo (DTH) zisebenza ngokuqhubekayo kuye ngohlu lomhlaba nolwelwesi lwezakhiwo ze-ankhoro. Izakhiwo ze-ankhoro zingaba ngama-bhuku aphiwe ezinsizeni ezinamandla, izintambo ze-wire, noma izinhlelo eziningi zethambo, ngayinye eyakhiwe ukuze ihlangabezane nezidingo ezihlukahlukene zomthwalo kanye nezimo zomhlaba. Ama-ankhoro anomthwalo ophakeme afakwa futhi alungiswe ngemuva kokubekwa kusetshenziswa ama-jack e-hydraulic akalibaliwe, akha ukusabalalisa komthwalo okusheshayo kanye nokuhlanganyela nezicucu zomhlaba ezizungezile neziqu. Inqubo yokudrillwa kufanele ibheke ukuphathwa kwamanzi omhlaba, kudingeka ukufakwa ngokucophelela kwezinto zokudrillwa, izinhlelo zokupakisha, nokukhipha amanzi ukuze kuvikelwe ukuzinza kwe-borehole nokwenza kube nekhono eliphezulu lokubamba i-ankhoro. Izivumelwano ezikhethiweyo ngesikhathi sokudrillwa nezokuhlola zitholakale, njengoba ukusebenza kwe-ankhoro kunquma ngqo ukwakheka kwezokwakha nokuphepha kwephrojekthi. Izicelo zokudrillwa kwe-ankhoro ziya phesheya kwezimo ezihlukahlukene ze-geotechnical kufaka phakathi izintaba ezicutshunguliwe, ubuso bemagadi, izigodi eziphansi, nezindawo ezijulile ezinamathafa aphakeme ezindaweni ezinomjikelezo. Ekwakheni izindonga zokugcina, ama-ankhoro omhlaba neziqu zivimbela ukuhamba kwezemizwa zomhlaba ukuze kuzuze ukucutshungulwa okujulile, okukhuphukayo nokusebenza kahle. Kwezinhlelo zeziqu nezigodi, ama-ankhoro alungisa izindonga ze-diaphragm, ama-sheet piling, kanye nezinhlelo ze-soldier pile, ikakhulukazi ezinhlelweni ezinqumayo ezidinga ukufaka umhlaba okwesikhashana noma ongenamkhawulo. Le ndlela isebenza kahle naphezu kwezimo ezihlukahlukene ze-stratigraphic, kusuka ebhutheni obuningi obuphumelelayo nezimfanelo zomhlaba ze-clay kuya ezindaweni ezihlukahlukene nezemibalela, ngokuhamba kokuqukethwe kwe-ankhoro nokujula kwe-ankhoro kushintshwa kuye ngezici zokufaka umhlaba kanye nezidingo zokusebenza. Izicelo zokuvuselela amabhuloho, ukuxhasa izitobo, ukuvikela olwandle, kanye nokuhlakulela izintaba zikhombisa ukuphenduka kwe-ankhoro kwezimali ezikhona ngaphakathi kwezobunjiniyela zanamuhla. Ukukhetha kahle uhlobo lwe-ankhoro, indlela yokudrillwa, kanye nezinhlelo zokuhlola kuqinisekisa ukudluliswa okufanele kwemithwalo emhlabeni kanye nokuzinza kwesikhathi eside, okwenza udonga lwezinkinga lube insiza ebalulekile kwezobunjiniyela be-ukwakha izisekelo.
Ukufakwa kweSelf-Drilling Anchor kubonisa indlela eqeqeshiwe yokuqinisa umhlabathi nokuzinza ngaphakathi komkhakha wezeMidlalo yeGeotechnical kanye nezinsiza zokwakha ezijulile. Le ndlela ifaka phakathi ukudonsa nokufaka igesi eyisikhala esihambisana nezinto ezicuthelekileyo zomhlabathi nezinsiza zeqaqa njengoba kukhishwa igesi, kudala uxhumano olujulile phakathi kwemiphakathi engazinzile nomhlabathi osezingeni eliphezulu. AmaSelf-Drilling Anchors awusizo kakhulu ezimweni zomhlabathi eziyinkimbinkimbi lapho izindlela zokuhlanganisa noma zokufaka igesi ezijwayelekile zikhombisa ukungasebenzi kahle. Ngokuhlukile kumaphoyinti ajwayelekile adinga holes eziqondile, amaSDA ahlanganisa izinqubo zokudonsa nokufaka kumsebenzi owodwa, kusho ukuthi isikhathi sokufaka nezege lishintsha kakhulu futhi kwanda ukuphepha kwesakhiwo ezimweni eziguquguqukayo zezepolitiki. Inqubo yokufaka idinga imishini ethize efaka phakathi imishini yokudonsa ethinta kakhulu efakwe nezinhlelo zokudonsa zokushaya, ama-units okufaka igesi, kanye nezinsiza zokufaka ama-rod we-anchor. Umdonsi we-drill uthuthuka ngaphakathi kwe-anchor head, ubhujiswe umhlabathi, izinto eziqine, nezinsiza zeqaqa eziqinile, kuyilapho ubuchwepheshe be-hollow-stem buvumela ukufakwa kwegesi ngesikhathi sokuhoxa noma ezikhathini ezithile. Abasebenzi bemishini kumele baqaphe ngokuqinile imigomo yokudonsa kuhlanganisa isivinini sokujikeleza, ukuhamba kokushaya, ingcindezi yokuhamba, kanye nengcindezi ye-gas ukuze kuqinisekiswe ukwakheka okuhle kwe-borehole nokwakhiwa kwe-gas. Izinhlelo zeSelf-Drilling Anchor zithunyelwa ezimweni ezahlukene zomhlaba zisuka kwi-clay ethambile, i-sandy loam, nomhlaba weqaqa ophithizelayo, okwenza zibe nesimo esihle kumaphrojekthi we-geotechnical abiza ukuqinisekiswa komhlaba okunembile kumaphrofayela omhlaba ahlukahlukene. Izicelo zokufakwa kweSelf-Drilling Anchor zifaka phakathi ibanga elibanzi lemisebenzi yokwakha izisekelo kanye nezinhlelo zezakhiwo zomphakathi. Ukuchithwa kwe-slope kusala kube yisicelo esiyinhloko, ikakhulukazi emsebenzini wokuqinisa izinhlelo zezokuthutha ezinjengezokuhamba kwebhasi kanye nezokuhamba ngezikharikhadi, ukusiza ekugwemeni izindunduma, kanye nezinhlelo zokuthuthukiswa kweholo lapho ukugcina ukuqiniswa kwe-slope kubalulekile. Ukusekela okuphezulu kokuthola izikhala zokwakha izindawo zangaphansi, izakhiwo zokupaka eziphansi, nezinhlelo ze-metro tunnel zivame ukufaka izinhlelo ze-SDA ukuhlinzeka ngesezondlo sokuxhasa nokuvimbela ukuwa komhlaba. Imisebenzi yokumba isebenzisa amaSelf-Drilling Anchors ukuze kuqinisekiswe ukuvikelwa kwezindlela ezingekho emhlabeni, kuyilapho izinhlelo ze-hydroelectric kanye nezinsiza zamanzi zisebenzisa ama-anchors ukuze kuqinisekiswe ukuzinza kwedamu nolwazi lokusiza izakhiwo ezisemhlabeni. Le ndlela ibaluleke kakhulu eduze kwezinsiza ezikhona lapho ukuhamba okuphansi nezithiyo zokushaya zenza imishini yokuhlola ejwayelekile ingasebenzi kahle. AmaSelf-Drilling Anchors anikela ithuba eliphezulu lokudlulisa loads uma kuqhathaniswa nama-anchors ajwayelekile ngenxa yokuphakama kokubamba kwawo nobudlelwano obuseduze nomhlaba nendawo yeqaqa, kuqinisekisa ukuzinza kwesakhiwo okungapheli kanye nokuhlala isikhathi eside ngaphansi kwesimo sokushayisa okukhona noma okuphindaphindayo okujwayelekile emisebenzini yokwakha ukuze kuqinise umhlaba.
Ukuphakamisa umhlabathi kungumkhuba wokuvuselela nokuzinzisa umhlaba okusebenzisa ukufakwa kwemiyalo yensimbi enedatha encane noma ama-reinforcing bars emithini yomhlaba, eqiniswa ngokuqhuba ukuze kwakhiwe isakhiwo somhlaba oqinisiwe. Le ndlela ye-geotechnical ibaluleke kakhulu ku-engineering yeziqalo zanamuhla nokuthuthukiswa komhlaba, ihlinzeka ngezixazululo ezikahle zokuzinza kwemifantu, ukweseka ukumba, nokuvuselela umhlaba ezimweni ezinzima zomhlabathi. Le ndlela iye yathandwa kakhulu emaphrojekthini okwakha adinga ukwesekwa komhlaba okwethulwa okwesikhashana noma okungapheli, ikakhulukazi lapho izinhlelo ze-piling noma izisekelo ezijulile zingase zibe yindleko ezingafanele noma ezingakaze zisebenze. Ukuphakamisa umhlabathi kusebenzelana nokuqinisa amandla okuphazamiseka komhlabathi okuzungezile okutholakala emiyalweni efakiwe, kwakha isakhiwo sokugcina isisindo esingakwazi ukumelana nengcindezi yomhlaba ehambelayo futhi sigcine ukuzinza ezinzululweni eziphakeme noma ezikhaleni ezivertical. Inqubo yokuphakamisa umhlabathi ivamise ukuqala ngokuqhubekayo ekuhambeni komhlaba ngokwaziswe kumangqamuzana kanye nasemigangatho, ilandela ukufakwa kwamabhakede ensimbi noma imiyalo nokufaka umjovo wegrout ophakeme ukuhlanganisa imiyalo nomhlaba ozungezile. Ubude bemiyalo ejwayelekile buhamba phakathi kuka-5 no-15 amamitha kuye ngobukhulu bokumba kanye nezimo zomhlaba, lapho imingcele ivamise phakathi kuka-1 no-2.5 amamitha kokubili phezulu nangokwejwayelekile. Uhlelo lwezinhlelo, olungase luhlanganise i-shotcrete, umgogodla wensimbi, noma amaphaneli e-concrete aqinisiwe, lufakwa njengoba ukumba kuqhubeka ukuze kuhlanganyelwe izinsiza futhi kuqinise imigwaqo. Ukuphakamisa umhlabathi kusebenze kahle ezithombeni ezinzima zokusebenzisa i-clays, umhlaba olungiselelwe, kanye nezindonga ezishisayo, lapho amandla afanele nokubamba kungatholakala phakathi kwemiyalo nomasipala womhlaba. Le ndlela ilungele ukuguquguquka ezimweni zomhlaba ezahlukahlukene nasemaphakathini alandelanayo, yenze kube yisixazululo esisebenziseka kalula ezinselelweni ezinzima zokuqinisa izisekelo ezindaweni zasemadolobheni nasezindaweni ezifile zokwakha. Izicelo zokuphakamisa umhlabathi zifaka izinkalo eziningi okubandakanya ukwesekwa kwemifantu okwesikhashana ngesikhathi sokumba kwezindaweni, ukuzinza okungapheli kwemigwaqo nokwakha, ukwesekwa kwemifantu ekhona, kanye nokuvuselela izifunda eziphakeme eziyingozi. Emaphrojekthini ezisekelo ezijulile nasezindaweni ezisemhlabeni, ukuphakamisa umhlabathi kuhlinzeka ngesisekelo esikhulu ngesikhathi sokumba kwepile cap nokwakha indawo, kuvumela ukufinyelela komhlaba okuphathwayo nokuphepha. Le ndlela ibaluleke kakhulu ku-engineering ye-geotechnical lapho ingaxubana nezinye izindlela zokuthuthukiswa komhlaba ezifana ne-micropiling, i-jet grouting, noma i-ground anchoring ukuze kwakhiwe izixazululo ezihlanganisiwe zezakhiwo. Ukuphakamisa umhlabathi kunezithako ezinkulu ezimnandi mayelana nesivinini sokufaka, ukusizakala kwezimali uma kuqhathaniswa nezindonga ezijwayelekile, ukuphazamiseka okuncane kwemhlaba, kanye nokwenziwa kweminye imikhawulo yesayithi ekhona. Imishini nezinto ezidingekayo—kubandakanya ama-drilling rigs, ama-grouting pumps, ama-grout mixers, insimbi yokwakha, kanye nezinhlelo zokufaka—zitholakala kalula ngeziphathimandla nezinkampani ezimisiwe ezigxile emsebenzini wokuvuselela umhlaba nezokwakha.
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