Pile head pre-cut-off device for plug-in cast-in-situ bored pile

Abstract

The invention discloses an insertion type cast-in-situ bored pile head pre-cut-off device. According to the device for cutting off the pile head concrete of the cast-in-situ bored pile in advance, after the cast-in-situ bored pile concrete is poured, a pouring guide pipe is pulled out and before the concrete is finally set, a concrete isolation blade of the device is inserted into the concrete near the designed pile top elevation through an operating rod of the device, then the operating rod is rotated, and the concrete isolation blade is separated from the concrete near the designed pile top elevation; the concrete isolation blades are unfolded to form a circular isolation surface, and the pile head concrete above the isolation surface and the pile body concrete below the isolation surface are prevented from being bonded in the hardening process, so that the workload of breaking the pile head concrete and chiseling the pile top flat after the cast-in-situ bored pile concrete is hardened can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of building pile foundation construction, in particular to a plug-in type bored pile head pre-cutting device. Background technique [0002] In the field of building pile foundation construction, bored cast-in-place pile is a widely used pile foundation construction technology. Steps such as pouring concrete into piles. When pouring concrete, it is usually necessary to appropriately increase the amount of concrete pouring, so that the height of the finished surface of the pile top concrete pouring appropriately exceeds the design pile top elevation. The strength meets the design requirements, and this process of concrete cutting is called pile head cutting. There are two kinds of traditional pile head cutting methods: manual air pick method and mechanical pick method. For the manual air pick removal method, it will not only cause dust, noise, vibration and other physical hazards to the workers, but also hi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved in the present invention is to provide a plug-in bored pile head pre-cutting device, which solves the difficulty in construction in the existing pile head cutting method, the steel bar is easy to break during the pile head cutting process, and the pile head is cut off. The surface of the pile top is uneven, and the pre-buried pile cutting device fails due to the elevation deviation of the steel cage during the construction process.

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