JPS609621B2 - How to join precast concrete columns - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining precast concrete columns.

Various joint structures have been devised to connect the upper and lower precast concrete columns, and these have achieved certain effects.

However, with all of these joint structures, in order to connect the precast concrete upper column to the precast concrete lower column, complicated temporary support methods such as special hardware, supports, or slings must be used. There were some drawbacks.

For this reason, the present invention proposes that the connection between precast concrete columns is made by using a lap joint between the upper and lower reinforcing bars to obtain strong and stable structural performance.
It was devised and created to streamline the construction of the pillars. Hereinafter, the present invention will be described with reference to the embodiments shown in the attached drawings. 1 and 2 indicate a precast concrete lower column and an upper column, and 3, 4, 5, and 6 extend and protrude from the precast concrete lower column. The length of the protruding reinforcing bars of the column main reinforcement is the length required for lap joints, and the protruding reinforcing bars 4 located at the corners in particular have male screws carved into them, and these male screws have short lengths. The female screw tube 7 is screwed together.

8, 9, 10, 11 are precast concrete Kamikatsura 2
This is an upper column protruding reinforcing bar that extends and protrudes from the lower end face of the column.

The precast concrete columns constructed in this way are used to connect the upper and lower columns.The construction process is explained below by erecting the lower column 1 vertically at a predetermined position and height. , the precast concrete upper column 2 is lowered from above, and the protruding reinforcing bars of the upper column meet and adjoin the protruding reinforcing bars of the lower column. do.

After that, when the height of the precast concrete upper column is adjusted by adjusting the screwing degree of the short female screw pipe 7 screwed into the protruding reinforcing bar 4 located at the corner, the verticality of the upper column is also adjusted at the same time. Also adjust.

Next, after placing the main reinforcement for the beam and the reinforcement reinforcement for the column,
After assembling the required formwork, concrete is poured into this joint, and after it has hardened, the upper and lower precast concrete columns are completed.

In addition, in the example, a case was described in which a short female spiral pipe was screwed to the protruding reinforcing bar of the lower column, but in another invention, a protruding reinforcing bar was provided by extending the column main bar on the upper end surface of the lower column. A protruding reinforcing bar was installed on the column main bar of the lower column by extending the column main bar from the lower end face, and a male screw was carved into the protruding reinforcing bar located at the corner, and a short female screw pipe was screwed to this male screw. The upper columns are lowered, the protruding reinforcing bars of the upper and lower columns are aligned and adjoined, the height and verticality of the upper columns are adjusted using short female spiral pipes, and the precast concrete is then constructed using the same construction process as before. This is the way to complete the pillar. Since the method of joining precast concrete columns according to the present invention is carried out by the process described above, the height adjustment and verticality of the upper column are adjusted by the degree of screwing of the short female screw pipe 7. The adjustment operation is minute and smooth, and the joining strength is reliable because it is joined by a lap joint, and it is also strong. In addition, ``This construction method eliminates the need for special hardware, supports, or jigs to temporarily hold joints, which has been considered a drawback in the past, and eliminates misalignment due to vibration during construction.
It can prevent movement, etc., and can be installed reliably and easily.

[Brief explanation of the drawing]

The drawings are for explaining the method of joining precast columns according to the present invention. Fig. 1 is a side view, Fig. 2 is an enlarged sectional view of section A in Fig. The figure shows: 1... Precast concrete lower column, 2... Precast concrete upper column, 3, 4, 5, 6... Protruding reinforcing bars of the main column reinforcement of the lower column, 4... Male screws carved. Protruding reinforcing bars installed, 7...Short female spiral pipes, 8, 9, 10, 11
...Protruding reinforcing bars of the main pillar of the upper column. Boat 1 figure Boat 2 figure 3 figure

Claims (1)

[Scope of Claims] 1. In a joining method for connecting upper and lower columns with main reinforcing bars extending and protruding from the end faces of upper and lower precast concrete columns, a protruding reinforcing bar is provided by extending the column main reinforcing bars on the upper end faces of the lower columns. The protruding reinforcing bars located at the corners are provided with male threads, and the protruding reinforcing bars are installed on the main column bars of the lower column with short female threaded pipes screwed onto these male threads by extending the column main bars from the lower end surface. After lowering the upper column and aligning the protruding reinforcing bars of the upper and lower columns adjacent to each other, adjusting the height and verticality of the upper column using short female spiral pipes, placing the required reinforcing bars and building the formwork. A method for joining precast concrete columns, which is characterized by assembling and pouring concrete. 2 Main reinforcing bars of lower columns that extend and protrude from the end faces of the upper and lower precast concrete columns, and in the connection method that connects the upper and lower columns, the main reinforcing bars of the lower columns are extended and protruded from the upper end faces of the lower columns. At the top, a protruding reinforcing bar is provided by extending the column main reinforcement from the lower end face, and the protruding reinforcing bar located at the corner has a male thread cut into it, and the upper column with a short female threaded pipe screwed into this male thread is lowered. Then, the protruding reinforcing bars of the upper and lower columns are placed adjacent to each other, and the height and verticality of the upper columns are adjusted using short female spiral pipes.Then, the required reinforcing bars are placed, the formwork is constructed, and the concrete is poured. A method for joining precast concrete columns characterized by pouring.