Composite reinforcing bar pre-tensioning method prestressed concrete pile with displaceable sleeves for connection

Abstract

The invention discloses a composite reinforcing bar pre-tensioning method prestressed concrete pile connected with displaceable sleeves for connection. The concrete pile comprises a plurality of prestressed steel bars, a plurality of non-prestressed steel bar portions, at least one sleeve and two end plates. The prestressed steel bars and the non-prestressed steel bar portions are evenly distributed between the two end plates in the circumferential direction. The number of the non-prestressed steel bar portions is one or more. The non-prestressed steel bar portions comprise at least two non-prestressed steel bars. Every two adjacent non-prestressed steel bars are connected with one sleeve or directly and fixedly connected. The displaceable sleeves are adopted for connecting the non-prestressed steel bars, and steel bar connection force transfer is more direct and more reliable through the mechanical connection way; the steel bars at the two ends of the sleeves can relatively displace according to the set before tensioning, non-prestressed steel bar mechanics is not produced or small tension force is produced, and the composite reinforcing bar pile model mechanical property is more reliable.

Description

technical field [0001] The invention relates to the fields of construction, transportation, port, water conservancy, municipal administration, etc., and in particular to a compound reinforced pretensioned prestressed concrete pile connected by a displaceable sleeve. Background technique [0002] Prefabricated piles currently on the market mainly include two categories: 1. pretensioned prestressed concrete piles, which are prefabricated piles that are only configured with prestressed steel bars. Since the pile body is only equipped with prestressed steel bars, the elongation rate of the steel bars after fracture is low, so the pile body is relatively brittle when it is damaged by bending. Two, prefabricated concrete pile, this concrete pile only configures the concrete pile of non-prestressed reinforcement, because it only configures non-prestressed reinforcement, the crack resistance of pile body, corrosion resistance are all relatively poor. [0003] Considering the above ...

AI Technical Summary

Problems solved by technology

Since the pile body is only equipped with prestressed steel bars, the elongation rate of the steel bars after fracture is low, so the pile body is relatively brittle when it is damaged by bending

2. Prefabricated concrete piles. The concrete piles are only equipped with non-prestressed steel bars. Since they are only equipped with non-prestressed steel bars, the crack resistance and corrosion resistance of the pile body are poor.

The biggest problem with this method is that in some cases it cannot meet the requirements of the current national standard "Code for Design of Concrete Structures" GB 50010-2010

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