Method for reinforcing and repairing random head setting rafter and purlin nodes of ancient buildings

Abstract

Provided is a method for reinforcing and repairing a random head setting rafter and purlin nodes of ancient buildings. The method comprises the steps of inserting the lower portion of a finished hard-wood dovetail tenon puncturing belt into a through long dovetail mortise on a purlin, planting the ends of each rectangular inserting tenon into a rectangular mortise of a semi-circular rafter opening, inserting the other ends of the rectangular inserting tenons into the mortise on the lower portion of a rafter head to form a dark tenon, so that the rafter head is overlapped in the corresponding semi-circular rafter opening, and after all the rectangular inserting tenons and the rafter head are assembled, reinforcing and repairing structures at the wooden rafter and the purlin nodes in the roof structural layer of the ancient buildings on the basis of not changing raw materials and construction techniques.

Description

technical field [0001] The invention relates to the protection and repair of the wooden structure layer of the roof of the ancient building, in particular to a method for reinforcing and repairing the rafters and purlin nodes of the ancient building. Background technique [0002] The rafters are large wooden components of ancient buildings. They are located between the purlins and the watchboards in the beam frame, and are placed on the upper and lower purlins and girders. They are arranged in a certain order, either at positive or oblique angles. Its section has two kinds of round and square. According to its location, "rafters" have different titles, such as: eaves rafters, brain rafters, flower rack rafters, etc. According to the research, the rafters have been used as early as the era of "wood as a nest", but because the roof was straight at that time, the "rafters" actually played the role of purlins. The dropped roof of the Han Dynasty indicates that there were multip...

AI Technical Summary

Problems solved by technology

This traditional repair method will bring the following disadvantages: First, although this method of fixing by penetrating iron bars has strong rigidity, it has insufficient flexibility and torsion resistance; in case of uneven foundation settlement or ground vibration, it is easy to cause iron The looseness of the joint between the bar and the rafters causes the reinforcement to fail, so that the safety of the rafter joints is still threatened

In addition, if the iron bars are exposed to the air for a long time, the rust due to oxidation will inevitably lead to the weakening of the tensile strength of the iron bars, which will cause the rafters to loosen and shift at the joints

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