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

Abstract

The invention discloses an inner valve of a hole-forming device of a cast-in-place large pipe pile and an application method thereof. The inner valve in the hole-forming device of the cast-in-place large pipe pile is combined with a double-layer sleeve to form a pile mould of the cast-in-place large pipe pile. The double-layer sleeve comprises an inner pipe and an outer pipe coaxial to the inner pipe, the inner valve comprises a plurality of valve units, the valve units are cut and formed on the same round table, and the valve units are rotatably connected to the lower side of the inner pipe.Wedge-shaped blocks capable of supporting two adjacent valve units are arranged in the double-layer sleeve, and the valve units are in lap joint with the inner lateral side of the outer pipe. Supporting assemblies are arranged between the valve units and the outer tube, and the supporting assemblies comprise top blocks, and magnetic material bodies are arranged inside the supporting assemblies orthe wedge-shaped blocks. The inner valve of the hole-forming device of the cast-in-place large pipe pile and the application method thereof has the beneficial effects that the stress of a core shaft is reduced, the defects of the sealing failure, deformation or inclination of the hole-forming device of a large diameter pipe pile are greatly reduced, the structural strength of the cast-in-place pipe pile is improved, and the service life of the pile mould is prolonged.

Description

technical field [0001] The invention relates to the technical field of cast-in-place large pipe piles, in particular to an inner valve of a hole former for cast-in-place large 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 construction indu...

AI Technical Summary

Problems solved by technology

[0006] 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 valve in the cast-in-place large pipe pile hole former and its use method, aiming at improving the cast-in-place The structural strength and combined sealing of the valve in the large pipe pile, thereby improving the structural strength and solidification efficiency of the cast-in-place concrete large-diameter pipe pile

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