Prestressed anchoring structure system for pier assembly and pier assembly construction method

Abstract

The invention discloses a prestressed anchoring structure system for pier assembly and a pier assembly construction method. The prestressed anchoring structure system comprises a bonding type fixed end anchorage device located in a base, a clamping piece type tensioning end anchorage device located at the top of a pier column, a steel strand cable and an embedded pipe. The embedded pipe is divided into two sections; the embedded pipe section I is arranged in the pier column, the upper end of the embedded pipe section I is hermetically connected with an anchor bearing plate, and the lower end of the embedded pipe section I is positioned at the bottom of a pier column; the embedded pipe section II is arranged in the base, the upper end of the embedded pipe section II is positioned at a splicing surface sealing notch in the top surface of the base, and the lower end of the embedded pipe section II is hermetically connected with the top of the horn-shaped anchor bearing plate; a splicing surface sealing ring is mounted at the splicing surface sealing notch in the top surface of the base; in the assembly state, in an inner cavity of the horn-shaped anchor bearing plate, a steel strand bundle containing the extrusion head and poured high-strength mortar are bonded and anchored, and force is transmitted into the base through the horn-shaped anchor bearing plate; and the bottom of the horn-shaped anchor bearing plate is hermetically connected with the end cover plate. The fixed end of the prestressed anchoring structure system is reliably anchored, and the requirement for pre-embedded construction is low; and the structure is simple and the cost is low.

Description

technical field [0001] The invention relates to a prestressed anchorage structure system for assembling bridge piers and a construction method for assembling bridge piers. Background technique [0002] With the continuous implementation and advancement of the prefabricated assembly method of bridge piers in our country, various assembly connection technologies have been continuously researched and applied, such as the grouting sleeve connection technology for the main reinforcement connection, the high-strength threaded steel connection technology for the prestressed reinforcement connection and the self-contained connection technology. Locking steel strand anchoring connection technology, etc. [0003] As the pier assembly prestressed connection is suitable for projects with large lateral loads and high seismic requirements, such as sea-crossing bridges, railway bridges, and urban viaducts; the various methods currently commonly used have some shortcomings; for example 1. H...

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Problems solved by technology

[0003] As the pier assembly prestressed connection is suitable for projects with large lateral loads and high seismic requirements, such as sea-crossing bridges, railway bridges, and urban viaducts; the various methods currently commonly used have some shortcomings; for example 1. High-strength threaded steel bars Connection technology, the strength of steel bars is relatively low, the amount is large, and the length is short and needs to be extended, which is expensive and the construction is more complicated;

[0004] 2. The current commonly used self-locking steel strand anchoring connection technology-such as the publication number is CN102535755, and the title of the invention is: "Self-locking prestressed anchorage structure and vertical prestressed anchorage system and construction method" The structure is simple and the construction is relatively simple. Convenient, but this technology has high requirements on self-locking anchor performance and construction sealing performance, because the self-locking anchor structure is pre-embedded in the abutment, it is difficult to detect the self-locking anchorage of the cable body anchor head penetrated later, In addition, the structure of the self-locking anchor is more complicated than that of the conventional fixed end anchor, and the cost is relatively high

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