Tensional anchoring system for secondary clamping of prestressed sheets

Abstract

The invention discloses a tensional anchoring system for the secondary clamping of prestressed sheets. The tensional anchoring system comprises an anchoring anchorage device combination (1), a tensional pressure bearing block (2), a horizontal jack (3), a tensional support block (4) and a tensional anchorage device combination (5), wherein the anchoring anchorage device combination (1) comprises an upper anchoring clamp plate (11), a lower anchoring clamp plate (12), permanent clamp bolts and nuts (14) and a force transmitting bolt (15), and the tensional anchorage device combination (5) comprises an upper tensional clamp plate (51), a lower tensional clamp plate (52) and tensional clamp bolts and nuts (53). The system has the advantages that the tensional components and the anchoring components are completely separated, and the permanent components are simple; and under the condition of having automatic centering, tensioning and directional anchoring functions, the system can tension and anchor high-stress and large-tonnage prestressed sheets and ensure that prestress losses cannot be produced by anchorage devices in the use process.

Description

technical field [0001] The invention belongs to the technical field of prestressing of engineering structures, and in particular relates to a prestressed sheet tensioning and anchoring system, which is completely separated from tensioning and anchoring, and has simple permanent components. It can not only realize the tension anchorage of high-stress and large-tonnage prestressed sheets, but also ensure that the anchorage does not produce prestress loss during use. Background technique [0002] Prestressed sheets, especially prestressed high-strength fiber composite materials, can be widely used to strengthen or reinforce civil engineering structures (such as concrete structures, steel structures, wood structures, etc.), to improve the performance and durability of engineering structures, It has very important social and economic benefits. Due to the stress characteristics of the sheet material itself (such as poor shear resistance), it is necessary to ensure that the stress...

AI Technical Summary

Problems solved by technology

The device can realize automatic tension centering and directional anchoring, but there are certain limitations:

[0004] (1) The clamping anchorage tensioning anchoring system is adopted. In order to solve the problems of automatic centering and directional anchoring, the holding screw is generally used to transmit force and tension, and the nut is anchored under pressure. The tension anchoring force is determined by the holding screw. Due to the limitation of the size and connection form of the nut and the nut, in actual engineering, it is impossible to use a large cross-section for the screw and the nut, and the connection length between the screw and the nut cannot be very long, so that the anchoring capacity of the anchor cannot be fully utilized. Tensioning and anchoring of prestressed sheets with high stress and large tonnage is still a difficult problem;

[0005] (2) Since the anchorage adopts screw and nut connection to transmit force, during the use stage, especially when there is a dynamic load acting on the structure, relative sliding between the nut and the screw is prone to occur, resulting in loss of prestress;

[0006] (3) The tensioning and anchoring are not completely separated, that is, the tensioning member is also a part of the anchoring member. For example, the holding screw and the anchoring base are common members for tensioning and anchoring. After tensioning, these shared members must be used as permanent anchoring members A part of it cannot be dismantled and reused, which not only wastes materials but also affects the appearance

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