An external valve of a cast-in-place large pipe pile hole forming device and its application method

Abstract

The invention discloses a cast-in-place large pipe pile perforator outer valve and an application method thereof. The outer valve can be combined with a double-layer sleeve to form a pile mold of a cast-in-place large pipe pile; the double-layer sleeve comprises an inner pipe and an outer pipe; the outer valve comprises a valve unit; the valve unit is cut by the same circular table; the valve unitis connected to the lower side of the outer pipe; the valve unit can be joined with the outer side surface of the inner pipe to form a perforation round table; a support module is arranged between the valve unit and the inner pipe; the support module comprises an ejection block; the ejection block is bonded with the inner pipe and the perforation round table at the same time; and a magnetic material body is arranged in the support module. The outer valve has the following advantages: the valve unit is combined for tidy alignment, so that mud is prevented from entering an annular cavity of thepile mold, and the structural strength of the large-diameter pipe pile is improved; the support module can improve the pressure capacity of the valve unit, so that the structural strength and the reliability of the cast-in-place large pipe pile are improved; the magnetic material body improves the connecting tightness and stability of the valve unit and the inner pipe; and the ejection block is vibrated during demolding to improve the structural strength of concrete.

Description

technical field [0001] The invention relates to the technical field of cast-in-place large pipe piles, in particular to an external valve of a hole-forming device for large-scale cast-in-place pipe piles and a method for using the same. Background technique [0002] Cast-in-situ concrete large-diameter pipe piles, namely PCC piles, use vibration to sink the steel inner and outer double-layer casing cavity structure into the foundation design depth under the protection of the closed movable valve pile shoe, and flow into the structure cavity through the concrete flow divider. Inject concrete evenly, and then vibrate to remove the cavity structure. The valve pile shoes are automatically separated when the cavity structure is removed, and the concrete is injected into the annular groove formed after the cavity structure is removed to form a cast-in-place concrete large-diameter pipe pile. . PCC pile technology is an efficient and economical high-quality pile technology in the ...

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the shortcomings of the existing cast-in-place large pipe pile valve structure strength and insufficient valve sealing, and provides a cast-in-place large pipe pile hole forming device external valve and its use method, aiming at improving the cast-in-place The structural strength and combined sealing of large pipe pile valves can improve the construction level and construction efficiency of cast-in-place concrete large-diameter pipe piles, and improve the construction quality and bearing capacity of large-diameter pipe piles

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