JPH045330A - Erecting method for pc pillar of multistory structure - Google Patents

Abstract

PURPOSE:To facilitate pillar erection of a multistory structure by providing a pair of hinging metal fixtures fitted to each other in a fitting hole and a bottom part of a pillar and forming an irregular surface metal plate for turnably placing these metal fixtures so as to make perpendicularity adjustable at the time of erecting the pillar. CONSTITUTION:Protruded and recessed hinging metal fixtures 13A, 13B, fitted to each other, are provided in a pillar fitting hole 12a of a foundation 10 and a bottom surface 11a of a strut 11. A tapered protruded part 15 is integrally molded in a metal plate 14, in the protruded metal fixture 13A, and on the other hand, a recessed part 18, fitted to the protruded part 15, is formed in a metal plate 17, in the recessed metal fixture 13B. Next, perpendicularity of the pillar 11 is adjusted and positioned by turnably fitting the protruded and recessed parts 15, 18 of the hinging metal fixture 13A, 13B for fitting the foundation 10 to the pillar 11, and thereafter, the foundation 10 and the pillar 11 are rigid connected by filling a space of the pillar fitting hole with a filling agent 22. In this way, perpendicularity of the pillar, after it is erected, can be easily obtained.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a multi-story structure in which precast concrete columns (hereinafter referred to as PC columns) are erected on a foundation when constructing a multi-story structure using precast members. This article relates to a method for erecting a PC pillar.

(Prior art) As a method for erecting PC columns in a multi-story structure using PC columns,
Conventionally, as shown in Figure 5, PC columns 2 were installed on a concrete foundation 1.
A slightly larger pillar insertion hole 3 is formed, the lower end of the PC pillar 2 is inserted into the pillar insertion hole 3, a plurality of support wires 4 are stretched around the upper end of the PC pillar 2, and the pillar insertion hole 3 is inserted into the pillar insertion hole 3. There are wedges 5, 5, . . . between the inner surface of the opening and the outer surface of the PC pillar 2.
There is a method in which the PC pillars are temporarily fixed by interposing them, and then a solidifying filler 6 such as mortar or concrete is filled in the gap and solidified, thereby making the PC column independent.

(Invention or problem to be solved by Zhao) In the conventional PC column erection method described above, the angle at which the PC column is erected is adjusted by adjusting the length of the support wire 4. There is a length of more than 1 m on the - side.
When using a PC column with a nearly square cross section, there is a problem in that it is nearly impossible to join the lower end surface 2a to the bottom surface 3a of the column insertion hole 3 and then adjust the installation angle afterwards.

For this reason, the horizontality of the bottom surface 3a of the pillar insertion hole 3 and the right angle layer of the lower end surface 2a of the PC pillar had to be accurately molded in advance.

In view of such conventional problems, the present invention eliminates the need to accurately mold the angle between the lower end surface of the PC column and the bottom surface of the column insertion hole,
Furthermore, the purpose of this invention is to provide a method for erecting PC pillars in a multi-story horizontal building, which allows the vertical angle to be easily adjusted during erection.

(Means for Achieving the Object) A feature of the present invention to solve the above-mentioned conventional problems is to provide a column insertion hole that is larger than the outer diameter of the lower end of a PC column (precast concrete column) on the upper surface of the concrete foundation. ,
After inserting the lower end of the PC pillar into the pillar insertion hole and temporarily fixing it by driving a wedge between the inner surface of the opening of the pillar insertion hole and the outer surface of the PC pillar, the gap between the inner surface of the pillar insertion hole and the PC pillar is A pair of concave metal fittings for hinges having a concave part and a convex part that are rotatably fitted into each other, and a pair of concave metal parts for hinges, in a method for erecting PC pillars of a multi-story horizontal building in which the PC column is filled with an assimilable filler such as mortar. One of the hinge hardware made of convex hardware is fixed to the center part of the bottom of the pillar-fitting large hole, and the other is fixed to the center part of the lower end face of the PC pillar, and the PC
When inserting the column into the column insertion hole, the concave hinge hardware and the convex hinge hardware are fitted into each other, and after adjusting the PC column to a predetermined angle by rotating the PC column using both hinge hardware as a fulcrum, The object is to perform temporary fixing using the wedge.

(Function) In this PC pillar erecting method, the PC pillar is inserted into the pillar insertion hole, and the horizontal position of the PC pillar is determined by fitting both hinge hardware to each other. After the fitting, the support wire By adjusting the length of the PC column, the verticality of the PC column can be adjusted using the hinge hardware as a fulcrum.

(Example) Next, implementation ρj of the present invention will be described with reference to FIGS. 1 to 4.

In the figure, 10 is a concrete foundation, and 11 is a PC column erected on the foundation 10. This PC pillar is not shown in the diagram, but is integrally molded to the length of three floors of the building.
A beam connection section is integrally provided in each upper floor section.

A column insertion hole 12 having a cross section one size larger than the PCCl2O cross section is opened in the foundation 10. The depth of this hole 12 is approximately 1.5 times the column diameter.

A hinge convex metal fitting 13A is embedded and fixed in the center of the pillar-fitting large bottom surface 12a. This convex hardware for hinge 13A is the third
As shown in the figure, a tapered protrusion 15 with a rounded tip is integrally molded at the center of the front side of a rectangular metal plate 14, and a stud bolt 16 for an anchor is integrated by welding on the back side. It consists of a metal plate 1
4 is buried in the bottom surface 12a of the column insertion hole with the surface side thereof exposed.

On the other hand, a concave hinge hardware 13B is buried in the center of the PC pillar bottom surface 11a, which pairs with the above-described convex hinge hardware 13A. This concave metal fitting 13B for the hinge is a metal grate 17.
A concave part 18 into which the convex part 15 fits is formed on the front side, and a stud bolt 19 for an anchor is integrated by welding on the back side, and the front side of the metal plate 17 is exposed to attach the PC pillar. It is buried in the center of the bottom surface 11a.

When installing PCCl2O, use a crane to remove PCCl2
O Lift it vertically, put its lower end into the column insertion hole 12 of the foundation 10, lower it, and both hinge hardware 13A,
The convex portion 15 and the concave portion 18 of 13B are fitted into each other. As a result, PCCl2O becomes freely rotatable around the fitting portion of both hinge metal fittings, and in this state, the lower end of the PC column is positioned in the horizontal direction.

Then four-way support wires 20.
20... is stretched and its lower end is fixed to the fixed running part on the ground. And each wire 20.20...
-Adjust the PCCl2O verticality by adjusting the length.

After vertically positioning the PCCl2O in this way, the PCC
The wedges 21, 21, . This allows it to stand on the PCCl2O foundation 10.

After that, cement paste is applied to the gap in the pillar insertion hole 12.
A filler 22 such as cement mortar or pea gravel concrete is filled. When this filler 22 solidifies, it becomes a PCCl2O or IM joint ellipse with the foundation 10.

In addition to the above-mentioned hinge hardware, the convex part 15 and the concave part 18 may be formed into a spherical shape as shown in FIG.
Both hinge hardware may be installed between the PC pillar and the pillar insertion hole in the opposite manner to the above.

(Effects of the Invention) As described above, the PC column erecting method of the present invention embeds and fixes hinge hardware that rotatably fits into the bottom of the pillar insertion hole of the foundation and the PC column bottom, and erects the PC column. By fitting both metal fittings together, the lower end of the vertically erected PC column can be accurately positioned at a predetermined horizontal position, and the PC column can also fit the hinge metal fittings together. It is now easy to rotate using a fulcrum, and the vertical angle can be easily adjusted after being erected.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of the state of the PC pillar according to the present invention after being erected, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is an enlarged view of an example of the hinge hardware part. FIG. 4 is a cross-sectional view of a quantitative example, and FIG. 5 is a cross-sectional view of a conventional example in which a PC column is erected. 10... Concrete foundation, 11...
PC pillar, 11a, 12a...bottom, 12...
... Pillar insertion hole, 13A ... Convex hardware, 13B.
...Concave hardware, 14.17...Metal plate, 15...Convex portion, 16...Stud bolt, 18...Concave portion, 20 ...Wire 21 ... Wedge, 22 ... Filler. Figure 1, Figure 2, Figure 4, Figure 3]9

Claims (1)

[Claims] A column insertion hole slightly larger than the outer diameter of the lower end of the PC column (precast concrete column) is provided on the top surface of the concrete foundation, and the lower end of the PC column is inserted into the column insertion hole, so that the inner surface of the opening of the column insertion hole and the PC column are connected. P of a multi-story structure in which a wedge is driven in between the outer surface and the PC column is temporarily fixed, and then the gap between the inner surface of the column insertion hole and the PC column is filled with a solidifying filler such as mortar.
In the C-column erection method, one of the two hinge hardwares, consisting of a pair of concave hinge hardware and a convex hinge hardware, each having a concave portion and a convex portion that are rotatably fitted into each other, is inserted into the pillar insertion hole. The concave hardware for the hinge and the convex hardware for the hinge are fitted into each other when the PC pillar is inserted into the pillar insertion hole. A method for erecting a PC column in a multi-story structure, characterized in that the PC column is adjusted to a predetermined angle by rotating the PC column using both hinge hardware as a fulcrum, and then temporarily fixed using the wedge.