Rijiyoyin Crawler Jet Grouting

Kayan aikin jet grouting da aka sanya a kan crawler suna wakiltar wani nau'in kayan aiki na musamman a cikin tsarin jet grouting na ruwa guda, wanda aka tsara don bayar da shigar da grout mai matsa lamba mai yawa ta hanyar boreholes da aka kula da su don aikace-aikacen daidaitawa da rufewa a cikin injiniyan tushe mai zurfi. Wadannan kayan aikin suna haɗawa da motsi, tsaro, da daidaito don aiwatar da ayyukan jet grouting da aka tsara a cikin yanayi masu wahala na ƙasa inda kayan aikin da aka sanya a kan motoci na al'ada ba za su iya aiki yadda ya kamata ba. A cikin aikin tushe mai zurfi, ana amfani da kayan aikin jet grouting na crawler don ƙirƙirar da ƙarfafa bangon shinge, rufewa ga dutsen da aka fashe, da inganta halayen ƙasa kafin aikin piling ko hakar. Babban aikace-aikacen su sun haɗa da gina bangon diaphragm da katangar katanga don sarrafa ruwa a cikin ginin dam da ayyukan hakar ma'adinai, ƙirƙirar bangon pile na secant ko na haɗin gwiwa ta hanyar hakar da aka taimaka da jet da canja wurin ƙasa, daidaita tudu a kusa da yankunan hakar, aiwatar da ayyukan haɗa ƙasa don ƙirƙirar matrices na ƙasa-cement, da kuma aiwatar da ayyukan bayan grouting don rufe ramuka da gurɓataccen wurare a cikin shigar da pile da aka kammala. Dandalin crawler yana da matuƙar amfani a cikin wuraren da aka takaita da kuma a kan ƙasa mai laushi ko mara tabbas inda rarraba da aka yi da track ke tabbatar da ƙaramin matsin ƙasa da ingantaccen tsaro idan aka kwatanta da kayan aikin da aka sanya a kan wheels. Ka'idar aiki tana haɗa da matsa lamba grout ta hanyar tsarin shigar da da aka kula da shi don ƙirƙirar jet wanda aka nufa a tsaye ga axis na borehole. Yayin da mai kula ke juyawa, jet ɗin da ke juyawa yana lalata da canza ƙwayoyin ƙasa, yana ƙirƙirar ginshiƙan grout na silinda. Grout—yawanci haɗin siminti tare da halaye na rheological da aka kula da su—yana cika ramin da aka hakar, yana kafa haɗin kai na inji tare da tarin ƙasa da ke kewaye. Tsarin kayan aiki yana buƙatar kulawa mai kyau na matsin fitar jet (yawanci 250–450 bar don ƙasa mai haɗin gwiwa, 350–600 bar don kayan granular), viscosity na grout, da saurin shigarwa don cimma diamita da ƙarfin ginshiƙan da aka tsara. Saurin janyewa daga zurfin shigarwa yana sarrafa kai tsaye tsarin ƙarshe na ginshiƙan da juyawa tsakanin ginshiƙan da ke kusa. Tsarin al'ada sun haɗa da kayan aikin crawler guda ɗaya tare da tsarin matsin lamba mai tsaye ko mai canzawa, tsarin mai kula biyu don gina manyan bangon ƙasa, da tsarin haɗin gwiwa wanda ke haɗa jet grouting tare da ci gaban casing don inganta canja wurin ƙasa a cikin jerin da suka yi rauni. Kayan aiki yana bambanta a cikin fadin track, ƙarfin injin (yawanci 50–150 kW na hydraulic), zurfin aiki mafi girma (10–50 m), da ƙarfin famfon grout (100–300 L/min). Ka'idodin zaɓi suna daidaita buƙatun aikin: zurfin bangon da tsawon, rarrabewar ƙasa da ƙarfin matsin lamba mara iyaka, yanayin ruwa, buƙatar diamita da tsarin juyawa na ginshiƙan, damar shiga shafin da ƙarfin ɗaukar ƙasa, da kuma iyakokin jadawalin. Rarraba nauyin track yana zama mai mahimmanci a cikin yanayin ƙasa mai ruwa ko laushi. Zaɓin tsakanin mai kula guda ɗaya da na biyu yana dogara ne akan tazarar ginshiƙan da aka tsara da buƙatun yawan aiki. Ayyukan kayan aikin jet grouting yana ƙarƙashin EN 12716 (Ayyukan ayyukan geotechnical na musamman—Jet grouting), EN 14199 (Micropiles), da ISO 21477 (Gane da rarrabawa na tsarin sararin samaniya). Bin doka na kayan aiki tare da PED 2014/68/EU (Dokar Kayan Aikin Matsi) da ka'idodin ATEX yana tabbatar da amincin aikin tsarin da aka matsa.