Riba:
- Ikon sanya AI daidai a cikin kwanciyar hankali mai gangara, ƙarfin ɗaukar nauyi da rarraba ƙasa
- Ability don aiwatar da ƙimar ƙimar ƙasa daga SPT, dakin gwaje-gwaje da bayanan filin tare da tallafin AI
- Ikon tabbatarwa da kansa na aminci factor da kayan aikin geotechnical tare da rufaffiyar tsari da ƙididdiga
Injiniyan Geotechnical filin ne inda hankali na wucin gadi zai iya zama duka biyu mafi taimako kuma inda yakamata a ce. Domin sakamakon a nan yana shafar lafiyar rayuwa kai tsaye: idan gangara ta gaza, za a rufe hanyar kuma mutane na iya mutuwa; Idan tushe ya daidaita, tsarin ya fashe; Idan bangon bango ya rushe, zai zama bala'i. Geotechnics (reshen da ke nazarin halayen injiniya na ƙasa da dutse) fasaha ce ta samun ingantaccen ƙira daga ƙasa mara tabbas. A cikin wannan tsari, fasaha na wucin gadi yana tsara bayanai, yana ba da shawarar daidaitawa, samar da ƙididdiga da bincika wallafe-wallafe; Amma injiniyan geotechnical mai izini ne ya sanya hannu kan ƙimar aminci kuma wannan baya canzawa.
A cikin wannan naúrar, za mu yi la'akari da uku na asali ayyuka na geotechnical ta hanyar ruwan tabarau na wucin gadi hankali: ƙasa halayyar (hako na ƙasa sigogi daga filin da dakin gwaje-gwaje data), gangara kwanciyar hankali (kimanin da zamiya aminci na wani gangare), da tushe / bearing ƙarfi (zama wani tsari a amince a kan ƙasa). A cikin kowane yanayi, ƙa'idar zinare iri ɗaya ce: kowane siga da lissafi da AI ya ba da shawara ana gwada shi da kansa akan lissafin hannun rufaffiyar da ma'aunin da ya dace (misali Eurocode 7, TBDY, dokokin ƙasa na gida).
Halin Ƙasa: Daga Bayanai zuwa Ma'auni
Ƙididdigar ƙasa ta dogara ne akan maɓalli masu mahimmanci da yawa: kusurwar juzu'i na ciki (φ), haɗin kai (c), nauyi kowane juzu'in naúrar (γ), da nakasar modules. Wadannan ba a auna su kai tsaye; An faɗo daga gwaje-gwajen filin da dakin gwaje-gwaje. Jarabawar filin da aka fi sani shine SPT (Gwajin Shigarwa ta Standard; adadin busa da ake buƙata don fitar da mallet mai tsayi 30 cm cikin ƙasa, ƙimar N). Akwai da yawa na ƙwaƙƙwaran alaƙa don tafiya daga SPT-N zuwa kusurwar juriya na ciki zuwa juriya ga ƙarfin ɗaukar nauyi - kuma wannan shine inda AI ke da taimako da haɗari.
AI yana tsara tarwatsa hakowa da bayanan dakin gwaje-gwaje, yana ɗaukar rashin daidaituwar naúrar, yana haɗa alaƙa daban-daban, kuma yana hango abubuwan da ke faruwa a cikin bayanan martaba. Koyaya, alaƙar ba ta da inganci a duk ƙasa: yin amfani da alaƙar SPT-φ da aka kafa don yashi zuwa yumbu zai haifar da babban kuskure. Samfurin ba zai iya zaɓar daidaitaccen daidaituwa ba; Injiniya wanda ya san nau'in ƙasa ya yi haka. Ayyukan hankali na wucin gadi shine gabatar da zaɓuɓɓuka a bayyane, aikin injiniya shine zaɓar wanda ya dace tare da mahallin.
Tukwici: Lokacin da kake son daidaitawa, sa samfurin ya ce "haɗa da nau'in ƙasa da kuma wane tushe ya shafi." Ta wannan hanyar, kurakurai kamar aikace-aikacen da ba daidai ba na dangantakar yashi da yumbu suna bayyana kafin a samar da lambar.
Kwanciyar Hankali: Factor Factor na Tsaro
Zuciyar kwanciyar hankali lamba ɗaya ce: factor na aminci (FS). FS shine rabo na sojojin da ke tsayayya da zamewa (ƙarfin dutsen / ƙasa) zuwa dakarun da ke zamewa (nauyi, matsa lamba na ruwa). FS> 1 yana nufin barga, FS <1 yana nufin gazawa; amma saboda rashin tabbas, ƙa'idodi yawanci suna buƙatar ƙofofin 1.3-1.5. Iyakance hanyoyin ma'auni (kamar Bishop, Janbu, Morgenstern-Price) raba gangara zuwa yanka kuma a lissafta FS don kowane wuri mai yuwuwar zamewa; Filaye tare da mafi ƙasƙanci FS shine mahimmanci mai mahimmanci.
Hankali na wucin gadi ya shigo a maki uku a nan. Yana samar da daftarin aiki akan shirye-shiryen shigarwa (geometry na sashi, sigogi na Layer, matakin ruwa) da fassarar sakamako. Yana haɓaka bincike na hankali (wanda siga ya fi shafar FS) dabaru. Kuma koyan inji na iya yin binciken farko cikin sauri (wanda gangara ke buƙatar duba fifiko) daga ɗimbin bayanan gangaren tarihi. Amma lissafin jiki wanda ke samar da FS dole ne ya zama abin dubawa, kuma mahimman bayanai kamar matsa lamba na ruwa dole ne su dogara ne akan ma'aunin filin-saboda matsananciyar ruwa yana bayan mafi yawan gazawar gangara.
Tsanaki: Ko da ƙirar koyon injin ta ce "wannan gangare yana da aminci", wannan fitowar ba za ta shigar da shawarar injiniya ba sai dai idan akwai ƙididdige ma'auni na FS a bayansa. Hasashen akwatin akwatin ba zai iya zama tushen yanke shawara na aminci na rayuwa; Kullum ana tabbatar da shi ta hanyar lissafin jiki.
Gindi da Ƙarfin Ƙarfafawa
Ayyukan tushe shine don canja wurin nauyin ginin a amince da ƙasa. Tambayoyi guda biyu ana yi: shin ƙasa zata iya tallafawa wannan kaya (ƙarfin ɗaukar nauyi) da nawa za a yi sulhu (matsala). Ana ƙididdige ƙarfin ɗaukar nauyi ta hanyar daidaita daidaitattun nau'i kamar Terzaghi/Meyerhof; Waɗannan ma'auni suna ɗaukar φ, c, γ da ma'auni na tushe kuma suna ba da kaya mai izini. AI na iya samar da daftarin wannan lissafin, amma injiniyan ya tabbatar da ƙididdiga da zato; saboda ƙananan kuskuren sigina na iya ci cikin shiru cikin amintaccen gefe.
Matakan yawanci: (1) ƙayyade bayanin martabar ƙasa da sigogi, (2) zaɓi ma'auni mai ƙarfi da ya dace, (3) ƙididdige babban ƙarfin ɗaukar nauyi da ƙimar aminci, (4) kimanta daidaitawa, (5) kwatanta sakamako tare da daidaitattun iyaka. Ilimin wucin gadi yana hanzarta kowane mataki; amma an tabbatar da nauyin da aka yarda da shi na ƙarshe kuma an sanya hannu ta hanyar lissafin hannu.
Karamin Harkoki guda uku: Ta Lambobi
Shari'a 1 - Kama alaƙa mara kyau. Wani ɗan ɗalibi ya sami kusurwar juzu'i na ciki daga SPT-N don Layer na yumbu don zama φ = 34°, tare da ingantacciyar alaƙa don yashi, kuma yana da ingantaccen samfurin. A cikin sarrafawa, an ga cewa wannan alaƙar ba ta da inganci a cikin ƙasa mai haɗin kai kuma ainihin φ ya yi ƙasa kaɗan. Ya kima darajarsa na karya da kimarsa da kusan kashi 2; Lokacin da aka tambayi ingancin yanayin haɗin gwiwar, an kama kuskuren kafin a kammala lissafin.
Case 2 - Ruwan ruwa da FS. Ƙididdigar farko na gangaren yankan hanya ya ba FS = 1.6 a cikin yanayin bushe kuma gangaren ya bayyana lafiya. Lokacin da aka ɗaga tebur na ruwa don lokacin rani, ya ragu zuwa FS = 1.1 a cikin nau'in lissafi guda ɗaya - a ƙasa da daidaitaccen madaidaicin. Zane-zane na AI ya nuna cewa matsa lamba na ruwa ya shafi FS; an kara samar da magudanar ruwa zuwa zane. Ya bayyana a fili tare da lambobi cewa mahimmancin shigarwa shine ruwa.
Case 3 - Gabatar da fifiko tare da nazarin hankali. Wani mahakar ma'adana ya sake kimanta sassan gangare 240. AI-taimakon saurin nunawa ya ba da fifiko ga sassan 18 tare da ƙarancin FS da babban hankali na ruwa. Tawagar ta farko ta yi amfani da cikakken cikakken ƙididdigar ma'auni ga waɗannan 18; An gano biyu daga cikinsu suna bukatar shiga cikin gaggawa. Samfurin bai yanke shawara ba, yana jagorantar ƙayyadaddun lokacin aikin injiniya zuwa sassan da ke da haɗari.
Rauni Mai Sauƙi / Ƙarfi Mai ƙarfi
Rawanin faɗakarwa:
Shin wannan gangare lafiya? Ƙimar SPT sune: [bayanai]. Faɗa mani dalilin aminci.
Ƙarfi mai ƙarfi:
Matsayinku: Mataimakin injiniyan Geotechnical. Kar a lissafta FS KAWAI tare da bayanan da ke ƙasa kuma a kira shi lafiya. Madadin haka: 1) Lissafin waɗanne bambance-bambancen da ke da inganci lokacin da ake cire sigogi daga SPT da aka ba, tare da caveats ta nau'in ƙasa.2) Ƙayyade abin da bayanai don lissafin FS (musamman matsa lamba na ruwa) na buƙatar ma'aunin filin.3) Yi hasashen abin da siga zai fi shafar FS don azanci.4) Rubuta ma'ana don kwatanta tare da daidaitattun kofa (misali 1.3-1.5 a cikin aminci tare da FS da yanke shawara). bayyana wannan.Bayanan ba a san su ba.
Samfura guda huɗu masu Kwafi
1) Kwatancen daidaitawar SPT:
Kwatanta daidaitattun kusurwar juzu'i na ciki don bayanin martabar SPT-N da aka bayar. Ga kowane daidaitawa: nau'in ƙasa mai dacewa, tushe, da daidaitaccen gefen kuskure. Yi kimanta yumbu da yashi daban; yi alamar haɗarin aikace-aikacen zuwa ƙasa mara kyau. Kada ku ba da madaidaicin ƙima; Ba da iyaka da zato.
2) Daftarin hankali na gangara:
Siga a cikin sashin gangare: γ, c, φ, tebur ruwa. Ƙididdige ƙididdiga ta wace hanya kuma aƙalla zuwa nawa kowane siga zai shafi FS. Faɗa mafi mahimmancin shigarwa da dalilin da yasa yake buƙatar auna filin. FSheet na zahiri dole ne a duba shi; bakin akwatin tsinkayar bayarwa.
3) Ikon lissafin iya aiki:
Bincika lissafin ƙarfin ɗaukar nauyi mai zuwa MATAKAI: shin zaɓaɓɓen ma'auni ya dace da nau'in ƙasa, raka'o'in sun daidaita, shin yanayin aminci ya isa daidai da ma'auni, shin an duba sulhu? Tuta kowane kurakurai ko zato da suka ɓace; Zan sanya hannu kan sakamakon.
4) Tsarin bayanin martabar bene:
Fassara bayanin hakowa kyauta zuwa cikin tebur na geotechnical: zurfin, nau'in ƙasa (ba da shawarar ajin USCS), SPT-N, matakin ruwa, sakamakon lab. Alama ma'anoni da ba su da tabbas a matsayin "yana buƙatar tabbatarwa"; ƙirƙira aji.
Wajibi, Hadari da Tabbatarwa
aikin geotechnical
AI gudunmawa
Matsayin haɗari
tabbatarwa mai zaman kanta
Drilling / Lab tace bayanai
babba
ƙananan
Ikon rikodi raw
SPT → daidaitawar siga
matsakaici
babba
Nau'in ƙasa + tabbacin tushe
Slope FS lissafi
iyakance
mai girma
Iyakance ma'auni + daidaitaccen ma'auni
Kayan aiki / wurin zama
iyakance
mai girma
Ƙididdigar hannun da aka rufe
Slope scanning/fifi fifiko
babba
matsakaici
An tabbatar da cikakken bincike
Tukwici: A cikin geotechnics yana da mahimmanci don zaɓar sigogi "a gefen lafiya" kuma ba "mafi yiwuwa ba". A bayyane yake gaya wa AI cewa kuna son ƙimar halayen (masu ra'ayin mazan jiya), ba matsakaici ba, kuma inda gefen aminci yake.
Kuskuren gama gari
- Aiwatar da alaƙa akan ƙasa mara kyau. Aiwatar da alaƙar SPT-φ mai inganci ga yashi zuwa yumbu yana da haɗari yana wuce gona da iri.
- Rashin kimanta matsa lamba na ruwa. Yawancin gazawar gangara suna zuwa ne daga matsa lamba na ruwa ba daidai ba; wannan shigarwar yakamata ta kasance bisa ma'aunin filin.
- Yin tsinkayar akwatin akwatin baƙar fata tushen yanke shawara. Ba a yanke shawarar tsaro ba tare da asusun FS na zahiri da ake iya dubawa ba.
- Yin aiki tare da matsakaicin ƙimar. Yin amfani da matsakaita maimakon ƙima na ra'ayin mazan jiya/halayyar ƙima a cikin mahimmin ƙididdigewa mai aminci yana ci cikin gefe.
- Sa hannu mai ruɗani tare da hanzari. AI yana hanzarta tsarawa; Hakki da sa hannu sun kasance tare da injiniya mai izini.
a takaice
- Abubuwan da ake samu na geotechnical kai tsaye suna taɓa amincin rayuwa; Sirrin wucin gadi shine mataimaki, injiniyan ne ya sanya hannu kan haɗin gwiwar tsaro.
- Ana fitar da sigogi na ƙasa daga gwaje-gwaje ta hanyar daidaitawa; Ya kamata a yi tambaya game da ingantaccen nau'in ƙasa da tushen kowane alaƙa.
- Anga na kwanciyar hankali gangara shine FS; Hatta hasashen koyan injin ana tabbatar da shi ta hanyar ƙididdige ma'auni mai iya dubawa.
- Matsin ruwa shine mafi mahimmanci kuma mafi yawan shigar da kuskure; ya kamata a dogara da ma'aunin filin.
- Ana tabbatar da ƙarfin ɗaukar nauyi da daidaitawa da kansu ta hanyar ƙididdige nau'i na rufaffiyar hannu da daidaitattun ƙofa; ƙimar hankali yana da mahimmanci.
Aikin aikace-aikace
Sami bayanan SPT da ba a bayyana sunansa ba (ko bayanan wakili). Tare da samfurin "kwatancen kwatancen SPT", sami lissafin ƙirar ƙira da dama don kusurwar gogayya ta ciki tare da ingancin yanayin su; da gangan yi lakabin Layer tare da nau'in ƙasa mara kyau kuma gwada ko samfurin yayi gargaɗi. Sa'an nan kuma gudanar da samfurin "Slope Sensitivity sketch" don yanayin gangara kuma taƙaita tasirin matsin ruwa akan FS a cikin jumla ɗaya.
jerin abubuwan dubawa
- [ ] Na fahimci cewa ainihin ma'auni na geotechnical (φ, c, γ) ana fitar da su daga gwaje-gwajen ta hanyar daidaitawa kuma cewa haɗin kai ƙayyadaddun ƙasa ne.
- [ ] Na fahimci mene ne dalilin aminci (FS) da kuma yadda shi ne anka na yanke shawara.
- [] Na aiwatar da cewa matsa lamba na ruwa shine mafi mahimmancin shigarwa kuma yana buƙatar auna filin.
- [ ] Na kafa yanke shawara na akan lissafin jiki da ake iya dubawa, ba kimar akwatin ML ba.
- [ ] Na yarda cewa shawarar tsaro da sa hannun sun kasance tare da injiniyan injiniyan ƙasa mai izini.