Na'urorin Jet Grouting masu juyawa

Kayan aikin jet grouting da aka sanya a kan crawler suna wakiltar kayan aiki na musamman da aka tsara don aiwatar da shigar da grout mai matsa lamba mai yawa don cimma inganta ƙasa da daidaitawa a cikin injiniyan tushe mai zurfi. Wadannan kayan aikin masu motsi suna haɗa tsarin shigar da daidaito tare da dandalin tushe na track, suna ba da damar gudanar da aikin ƙasa a cikin wurare masu iyaka da kuma ƙasa mai wahala inda kayan aikin hakar na al'ada ba za su iya aiki yadda ya kamata ba. Jet grouting yana ƙirƙirar hanyar haɗin ginshiƙan ƙasa-cement ta hanyar tsarin lalata da maye gurbin lokaci guda, yana inganta halayen geotechnical na tarin ƙasa da ke kewaye yayin da yake kula da samun dama da sassaucin aiki a wuraren gini. Babban aikace-aikacen kayan aikin jet grouting na crawler sun haɗa da daidaita ƙasa don gine-ginen ƙarƙashin ƙasa, gami da katangar katanga da katangar grout waɗanda ke aiki a matsayin shinge na ruwa don sarrafa shigar ruwa a ƙarƙashin dam, ƙarƙashin bangon sheet pile, da kuma kusa da hakar bangon diaphragm. Wadannan kayan aikin suna da ƙwarewa wajen ƙirƙirar ginshiƙan ƙasa-cement masu goyon baya da kansu waɗanda ke ƙara ƙarfin ɗaukar nauyi a kusa da zurfin hakar, suna daidaita tudu, da kuma bayar da goyon bayan gefe ga gine-ginen ƙarƙashin ƙasa na wucin gadi da na dindindin. Karin aikace-aikace sun haɗa da haɗa ƙasa don inganta tushe, gyara ƙananan ƙasa da aka ci karo da su yayin aikin piling, da ƙarfafa tushe da aka riga aka kafa inda yanayin ƙasa na ƙasa ya lalace ko aka ƙasa tantance su a lokacin ƙirƙira. Ka'idar aiki tana haɗa da amfani da tsarin shigar da matakai da yawa inda jets na ruwa ko grout masu matsa lamba mai yawa (yawanci suna aiki a matsin lamba daga 300 zuwa 600 bar) ke lalata da canza kayan ƙasa yayin da suke cika ramuka da haɗin siminti ko haɗin grout na musamman. Nozzles na shigarwa, yawanci suna cikin ƙarshen kayan aikin, ana janyewa a cikin matakai masu kula yayin da ake shigar da grout, suna ƙirƙirar ginshiƙan silinda masu juyawa na ƙasa da aka inganta. Tsarin mataki guda yana shigar da slurry na siminti kawai, yayin da tsarin matakai biyu da uku suna shigar da jets na ruwa don lalata da shigar da grout daban don haɗawa, suna ba da ƙarin iko akan tsarin ginshiƙan da halayen ƙarfin ƙarshe. Tsarin kayan aikin zamani na crawler yana haɗa da tsarin mast masu canzawa, yana ba da damar zurfin aiwatarwa daga aikace-aikacen shallow kusa da tushe zuwa zurfi fiye da mita 30. Kayan aikin yawanci suna haɗa da ƙungiyoyin ƙarfin haɗin gwiwa (diesel ko lantarki), tsarin shigar da matsin lamba tare da auna yawan ruwa, hanyoyin juyawa na sama, da tsarin kulawa na kwamfuta wanda ke rubuta kwararan matsin lamba, yawan amfani da grout, da ci gaban zurfi. Dandalin crawler mai ƙanƙanta yana da fadin 2 zuwa 4 mita, yana ba da damar amfani a cikin katangar ƙasa, ƙarƙashin viaducts, da kuma cikin wuraren da aka takaita inda kayan aikin da aka sanya a kan motoci ke zama maras amfani. Ka'idodin zaɓi don kayan aikin jet grouting na crawler suna dogara sosai akan rarrabewar ƙasa, buƙatar diamita da tazarar ginshiƙan, zurfin da aka saita, sararin da ake da shi, da jadawalin samarwa. Masana suna tantance ƙimar matsin lamba akan tsammanin juriya na ƙasa, ƙarfin grout da wuraren haɗawa, saurin juyawa da sarrafa saurin janyewa, tsayin mast da ikon kai, da ƙarfin tsarin tracking. Abubuwan muhalli da suka haɗa da matakan hayaniya, watsawar girgiza, da sarrafa dawowar grout suna shafar zaɓin kayan aiki a cikin wuraren birni. Ayyukan yana buƙatar bin doka tare da EN 14679 (Ayyukan ayyukan geotechnical na musamman—Jet grouting) da kuma daidaitattun ƙasa, waɗanda ke kafa hanyoyin da aka tsara don rubuta tsarin ginshiƙan, tabbatar da inganci ta hanyar ginshiƙan gwaji, ƙayyadaddun haɗin grout, da rage tasirin muhalli. Masu gudanar da kayan aikin suna buƙatar takardar shaida bisa ga ƙa'idodin injiniyan geotechnical na ƙasa, kuma ingancin tsarin matsin lamba yana buƙatar gamsar da ƙa'idodin kayan aikin matsin lamba da suka dace.