Method for pulling out deep pile foundation by utilizing full slewing drilling machine
A full-rotary drilling rig and pile foundation technology, which is applied to rotary drilling rigs, drilling equipment and methods, rotary drilling, etc., can solve the problems of reducing frictional resistance, limited applicable depth, and large impact on the surrounding environment, etc., to achieve reduction Small frictional resistance, effect of reducing impact
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[0018] The present invention will be further described in detail below in conjunction with a preferred specific embodiment of the present invention.
[0019] In a preferred embodiment of the present invention, a certain project is adjacent to a Φ3500 sewage pipe, which needs to be protected; the full-rotary drilling rig used is RT260H full-rotary drilling rig, which can drive the steel casing to make a circle to turn the Construction machinery for pressing and removing steel casings. The downforce and torque generated by the equipment during operation drives the steel casings to rotate, and the high-strength cutter head at the mouth of the steel casings is used to eliminate obstacles such as soil, rock formations, and reinforced concrete. Drill the steel casing into the ground to the bottom of the pile, and while the steel casing is gradually drilled in, use a high-pressure water gun to wash the gap between the steel casing wall and the pile to reduce frictional resistance, and...
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