Connector for lengthening prestressed steel bars and construction method thereof

Abstract

The invention belongs to the technical field of buildings and particularly relates to a connector for lengthening prestressed steel bars and a construction method thereof. The connector is characterized in that a plurality of steel bar holes axially penetrating through a body are formed in the body in the circumferential direction; the outer edge at the upper part of the body is uniformly provided with a plurality of opening grooves for installing the prestressed steel bars along the circumferential direction; the steel bar holes positioned in the upper part of the body are conical holes; the conical holes are internally provided with clamping pieces for locking the prestressed steel bars; the lower ends of the opening grooves are provided with anchoring rings which are internally provided with the conical holes; the conical holes are internally provided with the clamping pieces for locking the prestressed steel bars in a matching manner. The construction method comprises the steps of anchoring one end of each of one group of prestressed steel bars into the steel bar holes by the clamping pieces, and stretching and drawing the other ends of the prestressed steel bars; (2) enabling one end of each of another group of prestressed steel bars to penetrate through the opening grooves to be arranged in the conical holes of the anchoring rings by the clamping pieces, and stretching and drawing the other ends of the prestressed steel bars; and (3) grouting on the end provided with the connector. The connector has the advantages that the lengthening of the prestressed steel bars can be fast and conveniently realized and the connecting efficiency is greatly improved.

Description

Technical field: [0001] The invention belongs to the technical field of construction, in particular to a connector for extending prestressed steel bars and a construction method thereof. Background technique: [0002] At present, the design area of ​​civil buildings is getting bigger and bigger, which makes the basement bigger and bigger, and the architectural design often requires less or no structural joints, so that the continuous side length of some prestressed structures has changed from tens of meters in the past. Increased to more than 100 meters, resulting in more cross (overlap) connections of prestressed tendons and segmental stretching in super-long continuous structures. When stretching, it is easy to cause the structure to have no tension on the other side due to prestressing. Cracks appear in the pulled concrete ahead of time, which increases the loss of the applied prestressing force, resulting in the loss of prestressing tendons; at the same time, due to the ...

AI Technical Summary

Problems solved by technology

[0002] At present, the design area of ​​civil buildings is getting bigger and bigger, which makes the basement bigger and bigger, and the architectural design often requires less or no structural joints, so that the continuous side length of some prestressed structures has changed from tens of meters in the past. Increased to more than 100 meters, resulting in more prestressed tendon cross (overlap) connections and segmental tension in the super-long continuous structure. When tensioning, it is easy to cause the structure to be prestressed and the other side will not be tensioned. Cracks appear in the pulled concrete ahead of time, which increases the loss of the applied prestressing force, resulting in the loss of prestressing tendons; at the same time, due to the lap connection, one more connector is added and more prestressing tendons are used, resulting in waste

Images