Mechanical connection pile head using repetitively used precast concrete pile as end plate and manufacturing method of mechanical connection pile head

Abstract

The invention discloses a mechanical connection pile head using a repetitively used precast concrete pile as an end plate and a manufacturing method of the mechanical connection pile head. The mechanical connection pile head using repetitively used precast concrete pile as the end plate comprises the end plate, a connection sleeve, a rebar and precast bolts; the rebar is connected with the connection sleeve connected with the end plate; multiple high-strength bolt fixing holes, three precast bolt holes and three plate lifting threaded holes are formed in the end plate; the precast bolt holes and the plate lifting threaded holes are uniformly distributed in the central line of the concentric circles of the end plate; precast bolts are arranged in the precast bolt holes in the end plate and the end plate is locked by using two nuts, after piling is finished, the precast concrete pile can be recycled to be used in the next product; during bearing platform construction, a bearing platform rebar is directly screwed into the threaded holes in the connection sleeve, so as to realize the fast mechanical connection between a pile head and the bearing platform rebars; the adopted pile head is provided with the detachable end plate, the strength and tenacity of the end plate are far high than those of concrete, the end plate is more impact-resistant during construction, and the cost reduction as well as efficiency and quality improvement are all facilitated due to the recycle of the end plate and the mechanical connection of the pile head.

Description

technical field [0001] The invention relates to a mechanically connected pile head of a prefabricated concrete pile, in particular to a mechanically connected pile head for reusing a prefabricated concrete pile with an end plate and a manufacturing method thereof. Background technique [0002] For the existing centrifugally formed pipe piles and hollow square piles, after the pile foundation construction is completed, the main method for connecting the pile head to the cap is: cleaning on site, chiseling off the laitance layer in the pile inner hole, and suspending a pile in the pile inner hole. Pallet, put the tied steel cage into the inner hole, and then pour micro-expansion concrete to fill the inner hole with core filling. This process is complex in construction, long in cycle, high in cost, and difficult in quality control. The knot friction force is also often insufficient, especially when the buoyancy of the basement is high due to high groundwater level, untimely rai...

AI Technical Summary

Problems solved by technology

[0002] For the existing centrifugally formed pipe piles and hollow square piles, after the pile foundation construction is completed, the main method for connecting the pile head to the cap is: cleaning on site, chiseling off the laitance layer in the pile inner hole, and suspending a pile in the pile inner hole. Pallet, put the tied steel cage into the inner hole, and then pour micro-expansion concrete to fill the inner hole with core filling. This process is complex in construction, long in cycle, high in cost, and difficult in quality control. The knot friction force is also often insufficient, especially when the buoyancy of the basement is high due to high groundwater level, untimely rainstorm drainage, etc., the concrete core filled in the inner hole is easy to separate from the pile body, so it is also prone to quality accidents such as the basement floating and tilting; while the solid square The method of connecting the pile head and the cap is mainly: using the broken pile head, removing the end plate, exposing the steel bar, anchoring the bent anchor of the steel bar into the cap and binding the steel bar of the cap to pour concrete together. The disadvantage of this connection method is that the broken pile The impact on the pile head and the concrete of the pile body will cause damage when the head is turned, the construction is difficult and the efficiency is very low

At present, the prestressed pipe piles and centrifugal square piles specified in the national standard have end plates, but the pile head end plates cannot be disassembled and recycled. When connecting with the foundation cap, the pile head end plates are anchored into the cap, which wastes steel resources.

The end plate of the solid square pile is directly welded to the steel bar. When dismantling, the pile head is impacted and disassembled by gas cutting. The end plate is easily deformed and can only be treated as scrap iron.

Images