Plug pin type connection structure for prefabricated hollow uplift piles

Abstract

The invention discloses a plug pin type connection structure for prefabricated hollow uplift piles. The plug pin type connection structure comprises an upper hollow pile and a lower hollow pile; reserved plug pin holes A are formed in the connection ends of the upper hollow pile and the lower hollow pile; the upper hollow pile and the lower hollow pile are mutually connected through a solid connection rod; reserved plug pin holes B are formed in two ends of the solid connection rod; two ends of the solid connection rod are respectively inserted in the hollow ends of the upper hollow pile and the lower hollow pile; the two ends of the solid connection rod are respectively and fixedly connected with the upper hollow pile and the lower hollow pile by adoption of plug pins and fixed nuts; theplug pins pass through the reserved plug pin holes A and the reserved plug pin holes B; and two ends of the plug pins extend out from the reserved plug pin holes A and are fixed through the fixed nuts. The plug pin type connection structure is capable of greatly enhancing the shear and flexural capacity of the joint parts of the hollow piles. By adoption of the structure, the connection manner isconvenient in construction, direct in force transfer, clear in stress and controllable and reliable in quality.

Description

technical field [0001] The invention relates to a prefabricated hollow anti-uplift pile plug-type connection structure, which belongs to the field of butt joint construction of anti-uplift piles in construction engineering. Background technique [0002] Uplift piles are widely used in basements of construction projects, high-rise buildings, offshore dock platforms, anchor pile foundations of suspension bridges and cable-stayed bridges, pile foundations of large dock floors, and anchor pile foundations in static load test installations, etc. At present, according to the stress situation, there are single-section pullout and multi-section pullout-resistant piles. In the multi-section pile connection construction, the force transmission between prefabricated hollow concrete uplift piles and between piles and foundation components is completed through pile body reinforcement or end plate welded reinforcement and internal pouring concrete. Traditionally, the inner wall of the pr...

AI Technical Summary

Problems solved by technology

Traditionally, the inner wall of the prefabricated hollow pile is relatively smooth, and the bond strength between the core-filled concrete and the inner wall of the hollow pile is low. In order to achieve a larger pull-out resistance in the design, a longer core-filled concrete length is required

Since the core-filled concrete is long, it is not conducive to compaction, so the quality of the filled concrete is difficult to guarantee

At the same time, the existing construction industry requires that the butt joint of the main reinforcement of precast concrete components be fast and firm, but this requirement cannot be achieved by welding

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