Pre-tensioning-mode centrifugal concrete pile with steel strands and manufacturing method

Abstract

The invention relates to a pre-tensioning-mode centrifugal concrete pile with steel strands. The pre-tensioning-mode centrifugal concrete pile comprises a concrete pile body and a steel reinforcement cage. The steel reinforcement cage comprises prestress main reinforcements and stirrups. The pre-tensioning-mode centrifugal concrete pile is characterized in that the prestress main reinforcements are the steel strands, the steel strands of at least one end of the steel reinforcement cage are tightly combined with anchor rings; each anchor ring is provided with a stepped through hole, the large hole portion of the stepped through hole is a threaded hole, and the small hole portion of the stepped through hole is a taper hole; a plurality of clamping pieces are placed in the taper holes, the inner surface of each clamping piece is provided with clamping teeth, and multiple clamping pieces are spliced to form a chuck assembly; the outer circumferential surface of each chuck assembly is provided with a cone surface matched with the taper holes; an inner tooth hole is formed in the center of each chuck assembly, and the steel strands penetrate through the inner tooth holes of the corresponding chuck assemblies and are locked by the inner tooth holes. In the process of manufacturing the concrete pile body, the anchor rings combined with the ends of the steel strands and a tension plate are fixed together in a threaded connection mode, and consequently the steel strands which are used as the main reinforcements in the steel reinforcement cage can be tensioned and applied, and end plates can be freely installed according to actual requirements. The invention further relates to a manufacturing method of the pre-tensioning-mode centrifugal concrete pile with the steel strands.

Description

technical field [0001] The invention belongs to the technical field of pile foundation engineering of various building structure systems, and in particular relates to a pretensioned centrifugal concrete pile with steel strands and a related manufacturing method. Background technique [0002] All kinds of building structures generally involve pile foundation engineering. There are many products used in pile foundation engineering in the existing market, such as bored piles and prestressed centrifugal concrete pipe piles (including pipe piles and square piles). Under the current level of economic development and construction technology conditions, the field of architectural design has entered a new stage of development, and the requirements for pile foundations are also constantly improving. The technical performance of existing products can no longer meet the needs of the rapidly developing construction market. Highlights a number of serious technical flaws. [0003] The dev...

AI Technical Summary

Problems solved by technology

However, the patent application does not disclose how to specifically realize the connection and anchorage of the steel strand and the end plate and its specific production method. For ordinary technicians in the field of pretensioned centrifugal concrete pile manufacturing, because of the large span of the industry, generally It is impossible to know how to apply steel strands to the production of pre-tensioned centrifugal concrete piles; in addition, according to the technical solution described and the attached drawings of the patent application, there are protruding anchors on the end face of the formed pile, which makes It is impossible to connect the piles, and the protruding anchors are easily broken during the pile driving process, which will destroy the prestress of the pile body and reduce its technical performance such as bending resistance and shear resistance

Therefore, it cannot be produced according to the technical solution disclosed by it, and even if it is produced, it cannot be applied to pile foundation engineering at all. This patent only theoretically proposes a general technical conception of applying steel strands to pretensioned centrifugal concrete piles , but cannot be applied in actual production and construction

[0007] It can be seen from the above that the prestressed centrifugal concrete piles and bored piles with steel rods as the main reinforcement widely used in the market can no longer meet the needs of the current pile foundation engineering, and the pretensioning method using steel strands as the main reinforcement can no longer meet the needs of the current pile foundation engineering. Centrifugal concrete piles are only a technical idea at present. Since the steel strands are twisted by multiple steel wires, they are not easy to be welded or entangled. Therefore, how to connect and fix steel strands in pretensioned centrifugal concrete piles is the key to realize the manufacture of pretensioned centrifugal concrete piles with steel strands. The emergence of centrifugal concrete piles of steel strands

Images