Rod ɗin hakowa na shell-type

Shell-type drill rods sune kayan aikin muhimmin sashi na tsarin displacement piling da ake amfani da su a cikin ayyukan gine-gine na kasa da na ƙasa. Waɗannan tubular casings na musamman suna aiki a matsayin hanyar ci gaba ta farko don ci gaba da boreholes ta hanyar yanayin ƙasa daban-daban kuma suna kafa hanyar don sabon pile. A cikin ayyukan displacement piling, shell-type drill rods suna aiki ta hanyar yin kati na rotational ko percussive driving, suna ci gaba da tsallakewa ta hanyar yanayin ƙasa kuma suna danna ƙasa mai kusa. Tsarin hollow na waɗannan rods ya ba da damar cirewa ta ci gaba na ƙasa mai kasa ta hanyar ciki, wanda ke ba masu aikin gini damar kimanta yanayin ƙasa, kula da tarin ƙasa, da gano zurfin bearing layer. Shell-type drill rods suna da karfi musamman a cikin ƙasashen granular, dense sand deposits, da mixed soil-rock formations inda yin kati na traditional open-hole zai zama maras inganci ko maras tattalin arziƙi.