Rotary drilling rig is a kind of construction machine suitable for hole formation in building foundation engineering. Mainly suitable for sandy soil, cohesive soil, silty soil and other soil construction, widely used in cast-in-situ piles, continuous walls, foundation reinforcement and other ground foundation construction. The output torque is 120 ~ 400kN • m, the maximum
hole diameter can reach 1.5 ~ 4m, and the maximum hole depth is 60 ~ 90m, which can meet the requirements of various large foundation constructions.
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