Core barrels tare da bits na round-shank

Kayan aikin core barrels tare da bits na round-shank suna wakiltar wani tsarin hakowa na musamman a cikin fagen kayan aikin rock-socketing da ake amfani da su a cikin ginin tushe mai zurfi. Wannan rukuni yana ƙunshe da tarin bututu tare da haɗin round-shank bits, wanda aka tsara don dawo da samfurin core na dutsen da aka tsare da kuma ci gaba da ramin hakowa ta hanyar dutsen da aka samu a ƙarƙashin ƙasa. Round-shank bits—wanda aka bayyana da haɗin cylindrical maimakon haɗin zaren ko wedged—suna bayar da hanyar haɗi mai sauƙi wanda ya dace da aikace-aikacen zurfi mai matsakaici da kuma tsarin inda ingancin dawo da core da ingancin hakowa dole ne a daidaita tare da aikace-aikacen aiki. Babban fannin aikace-aikacen waɗannan tsarin yana haɗa da tushe na rock-socketed don bangon diaphragm, labulen katsewa, tsarin sekant da tangent pile, da kuma shigar da auger mai ci gaba wanda ke tsawaita cikin dutsen. A cikin ginin labulen katsewa, kayan aikin core barrels suna ba da damar masu kwangila su tabbatar da ingancin dutsen, tantance bayanan yanayi, da kuma tabbatar da zurfin socketing mai kyau yayin da suke ci gaba da ramin don shigar da casing ko aikin grout na gaba. Don hakowa na bangon diaphragm, waɗannan tsarin suna sauƙaƙa hakowa mai arha ta hanyar matsakaicin dutsen da kuma tabbatar da tsarin ɗaukar nauyi kafin ginin bangon pile. Tsarin round-shank yana da tasiri musamman a cikin yanayin fuska mai haɗaka inda keɓaɓɓun ƙasa da dutsen rauni ke buƙatar canje-canje na bit akai-akai da saurin motsawa. Aiki, tarin core barrel yana aiki ta hanyar hakowa na juyawa ko hanyoyin juyawa, dangane da halayen tsarin dutsen. Bututun—wanda shine bututun ƙarfe mai hallow—yana ci gaba da shiga cikin dutsen a ƙarƙashin juyawa da nauyin axial yayin da abubuwan yanke a fuskar bit ke rarrabawa da kuma karya kayan dutsen. Kayan core yana shiga cikin cikin bututun; yayin da hakowa ke ci gaba, core yana cikin bututun kuma ana dawo da shi ta hanyar fitar da bututun. Wannan hanyar dawo da tana bayar da ra'ayi na geologiya kai tsaye wanda yake da mahimmanci don yanke shawara kan ginin tushe. Haɗin round-shank yana ba da damar haɗin bit da janyewa cikin sauƙi ba tare da kayan aikin musamman ba, yana ba da damar saurin canje-canje na bit a cikin jerin dutsen da ba su da daidaito. Tsarin kayan aikin a cikin wannan rukuni yana bambanta bisa ga ƙarfin dutsen, zurfin hakowa, da bukatun aikin. Diamita na yau da kullum yana tsakanin milimita 75 zuwa 150 don aikace-aikacen tushe na yau da kullum, tare da tsawon bututun yawanci tsakanin mita 1.0 da 1.5. Ana samun tsarin bututu guda da na biyu; tsarin bututu na biyu yana haɗa da bututun juyawa na ciki wanda ke rage asarar core a cikin tsarin da aka karya ko wanda ba a daidaita ba. Nau'in bit sun haɗa da impregnated diamond, tungsten carbide insert, da kuma nau'in diamond na surface-set, wanda aka zaɓa bisa ga lithologies da ake tsammani daga dutsen sedimentary mai laushi zuwa granite da tsarin metamorphic. Ka'idodin zaɓi sun haɗa da ƙarfin dutsen da aka tsammani (wanda aka auna ta hanyar ƙarfin matsawa na uniaxial), darajar yanayi, matakin rarrabewa, adadin da ake buƙata na dawo da core, zurfin hakowa, da jadawalin aikin. Masu kwangila suna tantance tsarin round-shank da zaɓin haɗin zaren bisa ga buƙatun saurin hakowa, tsammanin rayuwar bit a cikin takamaiman nau'in dutsen, da kuma hanyoyin samun bit. Zaɓin diamita na core yana daidaita buƙatun ingancin samfurin don nazarin geotechnical da kuma lokacin hakowa da ƙarfin kayan aikin. Ka'idojin masana'antu da ke kula da waɗannan tsarin sun haɗa da ISO 2113 (Hakowa na diamond don binciken geologiya—Hanyar da kayan aiki) da ASTM D2113 (Hakowa na core na diamond don binciken shafin), wanda ke bayyana rarraba diamita na core, ma'aunin dawo da, da ka'idodin inganci. Ayyukan Turai suna ambaton EN 12716 (Aikin musamman na aikin geotechnical—Jet grouting da haɗa ƙasa) inda ya dace da hanyoyin ginin bangon labulen.