Integrated Construction Technology of Pipe Drilling,Sinking and Pulling of Bored Pile in Deep and Easy-to-collapse Stratum
In the construction of rotary bored piles in deep and prone-to-collapse hole strata,it is usually necessary to sink into deep and long protective casings to protect the wall and ensure the stability of the hole wall.So far,traditional construction methods of deep and long protective casings require two or more large machines to cooperate with each other,which leads to complicated working procedures and low drilling efficiency.In view of the above-mentioned problems in the construction of super-long casings in deep and prone-to-collapse strata,after in-depth research,an integrated construction technology of drilling,sinking and pulling out of rotary drilling cast-in-place pile full casings is developed.Only one rotary drilling rig is used for construction in the whole process of sinking long protective casings,rotary digging for soil and pulling out long protective casings,which achieves the effects of high construction efficiency,good pile quality and low comprehensive cost.
pilescollapse-prone stratumrotary digging pileall casingintegrated construction
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维普
