Dewatering na wellpoint shi ne hanyar kawar da ruwa ta muhimmi wacce ake amfani da ita a cikin gina ƙasa mai zurfi da ayyukan injiniyan geotechnical inda ake buƙatar rage teburin ruwa na wucin gadi. Hanyar ta amfani da jerin rami na ƙaramin diamita, yawanci 50-100mm, an shigar da su a zurfin zurfi don kawar da ruwan ƙasa daga yankin aikin gina. Tsarin wellpoint ya ƙunshi ramuka na ɗaya-ɗaya da aka haɗa ta hanyar pipes na header zuwa na'urar pumping ta tsakiya, wanda ke haifar da hanyar daidaita kawar da ruwa. Hanyar ta musamman amfani a cikin ayyukan piling, gini caisson, tono basement, da ayyukan underpinning inda zurfin tono ya wuce teburin ruwa na asali ko inda canjin ruwan ƙasa na lokaci na bazara ke barazana ga amincin gidan da amincin ma'aikata.
Sistimu na wellpoint dewatering suna da mahimmanci don kulawa da ruwan ƙasa wanda ake amfani da shi a cikin ayyukan gundunnuwa masu zurfi da gini inda ake gudunnuwa ƙasa ƙasa da matakai na ruwan ƙasa na asali. Wellpoints suna aiki kamar hanyar dewatering wanda ke da kulawa wanda yake rage matakai na ruwan ƙasa a cikin da kusa da yankunan gini, wanda yake ba da yanayin aminci da dry don ayyukan gundunnuwa kamar gundunnuwa, diaphragm wall installation, da gudunnuwa na basement. Ta hanyar rage matakai na ruwan ƙasa na wucin gadi, sistimu na wellpoint suna ba injiniyoyi na geotechnical damar aiki tare da yanayin ƙasa mai ƙarfi da tsarin gida mai ƙarfi badai yanayin ƙasa mara ƙarfi da mara tabbas wanda zai haɗɗa tsarin gida da lokacin aikin gini.
Kayayyakin gina wellpoint ya wakilci tsarin muhimmi na na wucin take na kuma na wutar ruwa a cikin ayyukan gina shingen foundation da piling inda ake bukatar kula da teburin ruwa don ayyukan gine-gine masu aminci da kuma ayyukan da za'a iya gina su cikin sauri. Na'urorin wellpoint dewatering suna wakilci na wucin take na wutar ruwa wanda zai iya kawo canji a cikin yanayin ruwa wanda yake da karamin diamita na wellpoints da aka haɗa zuwa pipe na header da aka ɗora tare da centrifugal vacuum pump, wanda yake kawo yanayin da ake iya kawar da ruwa a kusa da yankin aikin. Waɗannan na'urorin suna da amfani musamman a cikin ayyukan gine-gine na rana zuwa tsakiya, wanda yake kai tsakanin mita 2 zuwa 10 kasa da teburin ruwa, inda ake amfani da na'urorin dewatering na al'ada ko kuma sump pumping zai zama ba'a yiwuwa ko kuma ba shi da amfani. Manhaja ta wellpoint tana bada damarwa ga masu gina su za'a iya tsayar da ƙasa da ruwa, hana shigowar ruwa, rage matsin lamba na hydrostatic a kan kayayyakin wucin gadi da na dindindin, da kuma kare ayyukan gine-gine na shingen foundation daga matsalolin da suka shafi ruwa wanda zai iya cutar da ingancin shingen foundation, ko kuma amincin ma'aikata.
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