Casing body connection device for bored pile

Abstract

The invention discloses a casing body connection device for a bored pile, which comprises sleeve rings arranged at the lower ends of a driving casing and pile casings; the lower end of the driving casing is connected with the upper end of a top pile casing through the corresponding sleeve ring; the other pile casings are sequentially and vertically connected through the corresponding sleeve rings; the inner diameters of the sleeve rings fit with the outer diameters of the driving casing and the pile casings; each sleeve ring is connected with the upper end opening of the next section of pile casing through a fastening piece; four n-shaped tri-folded clamping slots are uniformly formed in the inner peripheral surface corner of the sleeve ring; four square arc-shaped clamping blocks of which the thickness fits with the depth of the clamping slots are uniformly arranged on the outer peripheral surface corner of each pile casing in positions under the upper end opening of the pile casing; four locking openings are uniformly distributed between each four contiguous clamping blocks; the axial length of each clamping block is a little smaller than the axial width of an arc-shaped slot; the peripheral length of each clamping block is a littler smaller than the peripheral width of two vertical slots; and four screw holes are uniformly formed in the corners of the long vertical slots in the wall of the sleeve ring. The casing body connection device for the bored pile has the advantages of simplicity in structure, reliability in connection, outstanding sealing performance of the connector, no easily-damaged part, high detaching and connection efficiency and more ideal using effect.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and relates to a cylinder connection device for bored cast-in-place piles. Background technique [0002] Cast-in-situ pile refers to the pile hole formed in the foundation soil by means of mechanical drilling, steel pipe extrusion or manual excavation at the project site, and a steel cage is inserted into the pile hole, and then concrete is poured into the pile. Currently, the most commonly used pile is In the casing construction method, in addition to preventing the hole from collapsing, the casing can also play the role of isolating water seepage in the borehole, protecting the ground of the hole, fixing the position of the pile hole and guiding the drill bit. The driving cylinder acts as a connector between the power head of the drilling rig and the casing. The brief process of the casing construction method is: burying the casing → drilling into the hole → clearing the hole → l...

AI Technical Summary

Problems solved by technology

When the casing is pulled up, it is also necessary to use a ladder to climb up section by section to disassemble the bolts between the casing and the driving casing, and to remove the bolts between the casing on the ground. Bolts and screw holes are stressed parts and vulnerable parts, and there are many and many Tight, heavy workload, low loading and unloading efficiency, very troublesome

[0006] The cylinder connection device of the bored pile using this technology can of course be used normally, but because the connection between the cylinders, the drive down, and the pull-out are completely dependent on the screw holes and bolts arranged on the collar and the upper pipe wall of the casing. The connection and cooperation are realized. The force is concentrated on the bolts and screw holes. The bolts and screw holes are easy to be damaged. Since the bolts and screw holes are stress-bearing parts, many bolts and screw holes should be densely arranged. Each section of the casing Many bolts must be tightened or disassembled when pressing down or pulling out. It is necessary to climb high to work, and it is very laborious to disassemble the bolts after bearing a large external force. The work efficiency of connection and disassembly is low. Not good enough, not ideal enough to use

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