Self-experiencing expansion pile shoe and immersed tube poured pile re-piling method

A technology of pile shoes and mold tubes, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as reducing the bearing capacity of single piles, dispersing the formation of pile bodies, and destroying the plastic shape of the foundation, so as to improve construction efficiency and engineering quality, increase the bearing capacity of single piles, and reduce the effect of soil extrusion

CN100338314CInactive Publication Date: 2007-09-19吴金钿
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2007-09-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is a self-experiencing expansion pile shoe and sinking pipe filling pile re-piling method. The pile shoe includes a modulu tube; and a cone pile tip composed of a plurality of cambered surface leaves, each straight edge on the upper end of the leaves can rotatably connect with the hinge welded on the bottom of the modulu tube, without the process of embeding the pile tip; and in the process of immersing the tube, the resistance is released, the soil extrusion is reduced, and the construction efficiency and quality is improved. According to the tests, compared with the embedded pile tip type, the filling coefficient of the present inventive device can increase 0.1 ~ 0.2, and can increase the single pile bearing capacity. A deep partial re-piling concrete filling pile method of the invention and a large diameter single sinking pipe concrete filling pile, have a great application significance, in addition, the invention can not only applies in the construction of high-rise building, but also can be applied to the treatment of the airport, dam, railway and expressway basis.
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Description

Technical field:

[0001] The invention belongs to the technical field of construction, and particularly relates to the improvement of a pile shoe and a process method for an immersed pipe concrete cast-in-place pile. Background technique:

[0002] As land resources become increasingly tense and the number of building layers continues to increase, the pressure on immersed tubes increases accordingly. However, in the current pre-embedded construction of prefabricated pile tips for building pile foundations, mechanical benches and vibration pressure can easily break the pile tips, causing the immersed tube, also known as the mold tube, to sink into the plug tube; continuous high-speed construction, the foundation is highly compressed, making the The pile floats and drifts, the pile body and the pile tip are separated, the pile body shrinks and deforms, and the soil is squeezed seriously, destroying the plastic shape of the foundation, affecting the condensation of the surroundin...

Examples

Embodiment Construction

[0012] Referring to Figure 1, Figure 2, Figure 3, the pile shoe includes a mold tube 2 and a steel sleeve 3. There are several notches 1-1 on the periphery of the bottom end of the mold tube 1, and the hinge 4 is welded inside, and the movable sleeve of each hinge is welded. A piece of arc triangular leaflet 7 is connected, so that each leaflet can swing radially, and a snap ring 5 is welded above the gap 1-1 at the lower end of the outer wall of the mold tube 1 . The lower end of the mold tube 1 is covered with a steel sleeve 3, and the upper and lower edges of the inner wall of the steel sleeve 3 are welded and connected to the upper positioning ring 2 and the lower positioning ring 6, wherein the inner circle of the lower positioning ring 6 has a large upper and a lower small into an inclined plane, which is combined with the movable vane 7. Constitutes a tapered guiding effect. When the mold tube 1 sinks, the outer diameter of the vane 7 and the bottom of the lower positio...