Ukwembulwa kwesayithi ukuphosa izimbobo kuyinsiza ebalulekile kwezobunjiniyela be-geotechnical eyakha isisekelo esiyisisekelo sokuklama nokusebenza kwemiklamo yemibuthano ejulile. Le msebenzi ekhethekile ibandakanya ukuhamba okuhlelekile komhlaba ophakanyisiwe nomsele wezindonga ngamasu okunemba amabholo sokuhlola izimo zomhlaba, ukuhlola izici zejolomane, nokuhlola izinselele ezingase zenzeke ngesikhathi sokwakha. Ukwembulwa kwesayithi kuphumelela imininingwane ebalulekile kubanjiniyela bezisekelo, abaklami bezinhlaka, kanye nochwepheshe bokwakha ukuze benze izinqumo ezichwepheshile mayelana nokwakhiwa kwezizinda, izidingo zokuthuthukisa umhlaba, kanye nezindlela zokwakha. Le nqubo ikhiqiza amarekhodi anembile ebholeni, amasampula omhlaba, nemiphumela yokuhlola e-in-situ ethinta ngqo ukwakheka kwezinhlelo ze-piling, odongeni babambelele, odongeni be-diaphragm, nakwezinye izingxenye ezijulile. Izindlela ezifanele zisemkhakheni wokwakha zicacisa ukuhamba kwe-drilling okujwayelekile, ukuphosa, ukuphosa ngekhebuli, kanye nezindlela ze-hollow-stem auger, ngayinye ikhethwa ngokuya ngezimo zomhlaba ezithile nezidingo zomsebenzi. Amabholo aqondile asebenzisa imishini yokuposa ethile avumela abanjiniyela ukuba bangene ezimayini eziqine futhi bathole amasampula esithako ukuze kuhlolwe ikusasa lezicubu nezinga lokuqina. Izindlela zokuphosa zingabantu eziyinkimbinkimbi emhlabeni obumbene kanye nezindonga ezinenqwaba lapho izindlela zokuposa zingase zibe nzima. Ngesikhathi sokuphosa, ukutholakala kwamadoda omhlaba okuqhubekayo ngokuhlola okwandiswe, amasampula ayizinkanyezi, kanye nokubuyiselwa kwamasampula akugwazwa kusiza othisha be-geotechnical ukuhlaziya ukuhlangiswa komhlaba, ukuhlela izinhlobo zomhlaba, kanye nokuthola izici ezibalulekile zobunjiniyela ezifana namandla okuphotha, ukubabazeka, nezici zokuhlala. Ukuhlolwa kwe-in-situ okwenziwa ngaphakathi kwamadolo, kuhlanganisa ukuhlolwa kokuphosa okujwayelekile, ukuhlolwa kokuphosa kwe-cone, nezilingo zokpressuremeter, kunikeza izilinganiso ezithile zomhlaba namakhono abalulekile ekwakheni isisekelo. Ukwembulwa kwesayithi ukuhlola izimo zomhlaba ezinhlobonhlobo ezivela kumakhilomitha alula nemicimbi ebumbenayo ukuya ezinsizeni ezinamatshe aqinile, amahlathi ahlanjelwayo, nezindonga eziqinile zomhlaba. Ukuhlola okuphansi kukhipha imininingwane ebalulekile mayelana nezinga lempahlazayo, izici ze-aquifer, kanye nobubanzi bezindawo zomhlaba, okubalulekile ekwakheni ukujula kwezizinda ezifanele nokukhetha izinhlobo ezifanele. Kumaphrojekthi ezisekelo ezijulile, ukwembulwa kwesayithi ngokuvamile kunezindawo eziningi zembobo ukuze kubonakale umehluko wezimo zomhlaba naphezu kwesayithi. Le mibiko eminingi yokuhlola ithuthukisa abanjiniyela ukufaka imiklamo yezizinda, ukuhlela izinselele zokufaka, ukuhlola izingozi ezihlobene nokwakha, nokukhetha imishini yokuposa efanele nezindlela zokulungiselela ukuze kuqinisekiswe ukuthi umkhiqizo uphumelele. Izicelo zokuphosa kwemishanguzo yephrojekthi zitholakala kuyo yonke imikhankaso yokuthuthukisa izinsiza, kuhlanganiswa nomsebenzi wezohwebo, izinhlelo zamasu nemigwaqo, izikhungo zezimboni kanye nezicelo ezikhethekile ze-geotechnical. Imininingwane ekhiqizwayo ivelakancane ivumela ukukhetha izizinda, ukuhlela ukuthuthukiswa komhlaba, ukuklama izikhala, ukuhlola ukuzinza kwezindonga, nokufaka izinsiza zomhlaba. Ngokwakha izimo ezichachayo zokugcina ze-geotechnical ngokusebenzisa ukuhlinzwa kwezenzo eziphumelelayo, amaqembu omsebenzi anciphisa izinkinga zokwakha, avimbela ukuhamba kwezinhlelo ezilukhuni, futhi aqinisekise ukuthi izinhlelo zezakhiwo ziphumelelisa ukufaka kuzokwenza abuzi ikhaliphi. Ukutholakala kolwazi olunembile lwezimbobo ezitholakalayo kanye nezincazelo ze-geotechnical ezivela kubaninisikazi abanolwazi nezinkampani zobunjiniyela kudlula ukuqinisekisa ukuhlela kwephrojekthi, kuthuthukisa izinqubo zokuvuma, futhi kunikeza ithemba kubabambiqhaza mayelana nezinsiza zomhlaba nezokwakha.
Ukuhlinzwa kwe-rotary core kubalulekile ekwenzeni ucwaningo lwes site phakathi nesigaba semisebenzi yokwakha izisekelo ezijulile, okuvumela ongoti be-geotechnical ukuthola amasampula emhlabathi nemabula angaphazanyiswa ngokuqinile avela ezindaweni ezihlukahlukene. Le ndlela yokhuhla isebenzisa ibhithi yokuhlanza ejikelezayo—ngokuvamile ibharel le-core enezinhlangothi zokuhlanza ezibhalwe nge-diamond noma i-carbide—ukuqhamuka ezindaweni zomhlabathi, umhlabathi onomphela, i-silt, i-sand, i-gravel, kanye ne-bedrock ngenkathi igcina ubunjalo beziqu ezitholakele. Ngaphandle kokuhlanza ngezinsimbi zokushaya noma ukuthakazelela, ukuhlinzwa kwe-rotary core kugcina ukulawula okunembile phezu kwejubane lokuhlanza, ingcindezi, nokuhamba komfutho, okwenza kube yindlela ekhethwayo yokuhlola ngemigqa yokwakha goqiga nolwazi lwe-geotechnical ngaphambi kokuklama nokuqinisekisa izisekelo ezijulile. Inqubo yokuhlinzwa kwe-rotary core ihilela ukunciphisa ibharel le-core elihambiswayo elinokuhlakanipha kokuhlanza ngegumbi elikhethekile, lapho amandla okujikeleza ahlanganiswa nengcindezi ephansi adala isenzo sokuhlanza esifana nesiyingi esikhipha isampula ye-core esiyindilinga. Umfutho wokuhlinza—ngokuvamile amanzi, i-bentonite slurry, noma i-polymeric mud—usebenzisa izinjongo eziningi: ukususa izigaxa eziphumile ebhodeleni, ukuhlinzeka ukuhlinzwa kwembobo, ukunciphisa ukunqoba nokushisa ebezihlinzwa, nokwakha indlela yokubuyisela amasampula angaphazanyiswa. Abakhi bezinsizakalo ze-geotechnical basebenzisa imishini ethize yokuhlinzwa kwe-rotary core efakwe kumashini ewashiyiswa enziwa ngemoto, izinyawo ezihamba phambili, noma ama-skids ukuze bangene ezindaweni zokusebenza ezikhethiwe ngenkathi begcina ukunemba okudingekayo kokuhlukanisa umhlaba. Lezi zinsiza zifaka phakathi ama-mast wokuhlanza anokufinyelela kokuqala nokwakheka, izinhlelo zokuhamba kwamanzi okuphakanyisiweyo, ama-core barrels anobubanzi obuhlukahlukene obuphakathi kwebanga le-36mm kuya ku-152mm, kanye nezinhlelo zokuphatha i-wireline noma ama-rod ukuze kube nokukhuphukela kwemiphumela efanele. Izicelo zokuhlinzwa kwe-rotary core zikhula kwiimeko ezahlukene zomhlaba okuhlanganisa ucwaningo lokwenzeka kwezakhelo, ukuhlola amandla okuthwala, ukuqagela nokulungisa kwesimo, ukuhlola umhlaba ongozini, kanye nokuhlola izindawo ezinzima ezinomhlaba onetshe, amatshe amakhulu, noma ama-layer enziwe ziqinile eziphikisana nezindlela zokuhlanza ezijwayelekile. Le ndlela yokuhlola ibalulekile uma bonke bahlinza badinga ukuhlukanisa phakathi kwemibandela ehlukene yomhlaba, bakhomba izindawo ezinzima noma amatshe anokhozi, balinganise izinga lekhwalithi yamatshe ukuze kube nokufakelwa okujule wokuhlinza kwembobo, noma baqinisekise ukutholakala nokuthamba kwezigaba ezisemqoka ezinjengezibuko ze-sand ezinzima noma ama-gebedlayi enzelwe i-clay enezinga. Abakhi nabaqhubi bezinsiza bemikhiqizo ye-geotechnical bathembele ekutheni ukuhlinzwa kwe-rotary core kuqedeleze ukusaba kokwakhiwa kwezakhiwo, kwakha izikhathi ezinzulu zamapile nezimfanelo zokuthwala, nokunciphisa ubungozi bokwakha ngokunikeza ulwazi olunembile olungaphezulu kwendawo ngaphambi kokutshala imali enkulu emshinini wokwakha izisekelo ezijulile nokulungiselela izindawo.
Ukugunda okukhipha umhlaba kukhombisa indlela ebalulekile futhi esetshenziswa kakhulu ekukhuphuleni umhlaba nasekucwaningweni kwezindawo, ikakhulukazi kumaphrojekthi wezisekelo ezijulile lapho ukuqonda izimo ezingaphansi komhlaba kubaluleke kakhulu ekwakhiweni nasekuphumeleleni kwezisekelo. Ngaleyo ndlela, kuhlinzekwa ngokubizwa ngokuthi ukugunda okukhipha umhlaba ngekhebula noma ukugunda ngekhabhoni, le ndlela isebenzisa isikhumbuzo esinzima esiphakanyiswe kukhebula lesteel ukuze sishaye futhi sithinte izithako zomhlaba nezindonga, kancane kancane sihamba phambili eholeleni ejulile. Le ndlela iqhubekile ukuba yindlela ekhethiweyo yokwakhiwa kwezisekelo nasekucwaningweni komhlaba ngenxa yokuba lula, ukungabizi, kanye nekhono lokukhiqiza amasampula aphazamisekile omhlaba nezindonga ezibonisa kahle ukuhluka kwezakhiwo ezingaphansi komhlaba across izingqimba eziningi nezikhathi. Inqubo yokugunda okukhipha umhlaba ibandakanya ukwehlisa futhi uphakamise kabusha isikhumbuzo sokugunda kanye namathuluzi okusika ukuze aphule futhi akhishwe impahla, ethathwa bese ikhululwa usebenzisa isikhumba noma ibhayi. Le msebenzi yokushaya ophindaphindiwe ikakhulukazi iyasebenza emhlabeni ophakeme, emadwaleni, kumathafa, nakudonga lwezindonga eziphathekayo eziazayo ngesikhathi sokucwaninga ngezindawo zokwakha izisekelo zegundane. Le ndlela ivumela abahlinzeki bezokwakha ukukhomba ukuhamba kwemvelo yomhlaba, ukuthola izingqimba ezikhono ezifanele ukusekelwa kwezakhiwo, nokuhlukanisa ubude bemithwalo—data ebalulekile yokukhomba ubude bemisila, izinhlobo zamadolo (amadolo adonswayo, amadolo ethinta), nezimo zokwakha kwezisekelo. Imishini yokugunda okukhipha umhlaba ivamise ukuba namandla amakhulu, ingakwazi ukufakwa ezindaweni ezimfushane, futhi idinga ukulungiselela okuncane uma iqhathaniswa nezinhlelo zokugunda ze-rotary noma ze-auger, okwenza kube nemali. Ukugunda okukhipha umhlaba kubalulekile kakhulu ukuze kuzuze amasampula e-Standard Penetration Test (SPT) ezikhundleni ezithile, kuhlinzeka ngemilinganiselo eqondile yokucindezela komhlaba nemisebenzi ye-friction nge-N-values, okusetshenziswa odokotela bezobunjiniyela ukuze bacabangele amandla okuphatha nokubika ngezinga lokuhlanza kweziko elifushane nelijulile. Le ndlela ikhululekile ezimeni zomhlaba ezinzima ezihlanganisa umhlaba obambe, umhlaba ogugile, ukuxuba kwenza umhlaba nephakethe, kanye nezindonga ezijabulelayo lapho ukugunda okujwayelekile kungahlangabezana nezinkinga zokusebenza. Amaphrojekthi okwakha ahlukaniswe phakathi nezisekelo zezakhiwo eziphakamileyo, izindonga zokwenza izikhumbuzo, kanye nezinhlelo zokwakha izindonga eziphezulu zesiqhingi zingcishe ukuncika ekugundeni okukhipha umhlaba ukuze kuqinisekiswe ukuthi ucwaningo lwezobunjiniyela lusungula iziseko eziqinisekileyo zokwakha nezindlela zokwakha. Amasampula akhishwayo, amabhuku ezikhumbuzo, nemininingwane yokuhlola ukujula ethathwe kwi-campaigns yokugunda okukhipha umhlaba, ziqondisa izinqumo zokwakha, futhi ziyasiza abahlinzeki bezokwakha ukujabulisa izichazamazwi zamadolo, ukujula, nemigudu yokufaka, kokubili ezisemanzini nasezindaweni zezezimali, kuhlangabezana nezindinganiso ze-geotechnical engineering nemithetho yokwakha.
U-Sampling Wezinga Ojwayelekile (SPT) uyindlela ebalulekile yokuhlola umhlaba eyenziwa endaweni, esetshenziswa kabanzi kwizobunjiniyela bezehlakalo ukuze kuhlolwe izimo zomhlaba, izakhiwo zomhlaba, kanye nekhono lokubamba ezindaweni zokwakha izisekelo. Le nqubo ebalulekile ifaka phakathi ukufaka isampula esihlukaniswe ngamanqampunathi emhlabeni usebenzisa ukushaywa okuqondile okuvela kwi-hammer ehla, kukalwa inani lokushaywa okudingekayo ukuze kuqondiswe isampula ibanga elithile. U-N-value otholakalayo unikeza idatha ebalulekile ngokuqinileko komhlaba, amandla, kanye necomposition, okwenza i-SPT ibalulekile ekwakheni izisekelo ezinzulu, emisebenzini yokuhlanya, kanye nezinhlelo zokuthuthukisa umhlaba. Ababunjiniyela bezisekelo bathembele kumphumela we-SPT ukuze bakhethe izinhlobo ezifanele zamapile, ukujula, kanye namakhono okuthwala umthwalo lapho besebenzisa amasu ezisekelo ezakhiweni, ezikhalweni, kanye nezinhlelo zokwakha. Inqubo ye-SPT idinga imishini ekhethekile yokugoba izimbobo nemishini yokugoba eyezimpande ekwazi ukukhiqiza izimbobo ezizinzile ezijulile ezidingekayo zokuhlola. Imishini ejwayelekile ifaka phakathi ama-mast okugoba aphakeme, izinhlelo zokugoba ezishintshayo noma ezishaywayo, kanye nezinsiza zokuthola eziklanyelwe ukumelana nemithwalo ethokozayo. Le ndlela yenziwa ngokuhlanganyela nezinhlelo zokugoba izimbobo ezivumela ukufinyelela ezindaweni ezahlukene zomhlaba nezendlalelo zomhlaba. Imishini yokugoba efakwe izinhlelo ze-auger, izampuli ezihlukanisiwe, kanye nezinsiza zokuhlola ezisezimbobeni ivumela abazosebenza ngezobunjiniyela bezehlakalo ukuqoqa ngempumelelo izampuli zomhlaba nokwenza ukuhlolwa okuningi ezingeni ezahlukene. Ukujula kwe-SPT kuyenza ihambisane nezikhulumi zokugoba ezahlukene, kusuka kwimishini yokugoba enokwandiswa okuncane kuya kwezinhlelo ezinkulu ezishintsha ezisetshenziselwa imikhankaso yokuhlola enkulu. Imiphumela ye-SPT iyigugu kakhulu ekuhloleni izimo ezihlukahlukene zomhlaba ezibhekana nemisebenzi yokwakha izisekelo ezinzulu, kuhlanganisa nezinsimu eziyinqaba njengam sand nezigxivizo lapho izindlela zokuhlola ezahlukahlukene zingase zisezingeni eliphansi. Ukuhlanganiswa kwe-N-value okuqhamuka ngaphakathi kweminyaka eminingi yocwaningo lwezobunjiniyela bezehlakalo kuvumela ababunjiniyela ukuthi babale ukushaywa komhlaba, ukujula okuqhathanayo, kanye nezinto ezibalulekile zokuthwala umthwalo ezibalulekile ekwakheni izisekelo zamapile neminye imithombo ehlelekile enkulu. Imininingwane ye-SPT iyakhuthaza izinqumo mayelana nokukhethwa kwezinhlobo zamapile—noma ukufaka amaphayili ahlanzekile, amapile abhola, noma izisekelo ezikhethekile—futhi isiza ekwakheni ukujula okufanele nezinhlelo zokuhlola umthwalo. Izicelo ziyaqhubeka phakathi kwezinsizakalo zokwakha ezifaka izakhiwo zamabhizinisi, izikhungo zomkhakha, izakhiwo ezinemininingwane yamanzi, nemisebenzi yokuthuthwa lapho ukuchazwa kwendawo okufanele kubalulekile. Imikhankaso yokuhlola indawo efaka U-Sampling Wezinga Ojwayelekile ihlala iyisibonelo sezikole zembonini zokuhlola amathuba ezisekelo zakudala nezinemininingwane. Ukuhlanganiswa kokuthola izampuli zomhlaba, ukuhlolwa kwendawo, kanye nokufaneleka komnotho okuphumelelayo kwenza i-SPT indlela eyinhloko yokuchaza ukujula okuphansi kuya kokuphakathi kumaphrofayili omhlaba amaningi. Abathengisi kanye nababunjiniyela abakhetha imishini yokuhlola umhlaba nezinsizakalo zokugoba bagxila kumishini ekwazi ukuqhuba imisebenzi ye-SPT enokwethenjelwa, njengoba ikhwalithi kanye nokunembile kwezokuhlola izisekelo kuthinta ngqo ukuphepha kokwakha, ukufaneleka kwemali, kanye nempumelelo yephrojekthi. Izinkampani ezisebenza ngezobunjiniyela bezehlakalo zigcina imishini yokugoba nokuhlola ethile ukuze kutholakale imiphumela ye-SPT enembile nenembile esekela izinqumo ezinhle zezehlakalo phakathi nenqubo yokuklama nokwakha izisekelo.
Get the latest equipment listings, industry news, and market insights.