JPH10311041A - Column base foundation of precast concrete column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate execution of works and reduce the construction costs by using as structural member a prestressed concrete material consisting of a precast concrete which is of high quality and low-cost, improving the structure of the column base and the method of construction in case prestressed concrete material is used as the material of columns, and simplifying the base structure of the column base of prestressed concrete material. SOLUTION: A footing foundation 2 is installed under a slab 1, and beside the footing foundation 2, base beams 3 in required direction are connected. On the oversurface of the footing foundation 2, a column leg hole 4 is box drawn, and therein the column base 5a of each prestressed concrete column 5 is placed. A post-placed concrete 6 is driven into the hole 4 and the column base 5a of the prestressed concrete column 5 is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an S-reinforced steel material for covering a prestressed concrete material or a prestressed concrete with a steel pipe as a precast member.
The present invention relates to a column base for supporting a column base of a building structure using a C material as a column material.

[0002]

SUMMARY OF THE INVENTION Reinforced concrete (R
C) For the pillars of the building, the main bar and the band bar are tied together with a beam at the site, and a formwork is assembled with plywood etc. on the outside while maintaining a certain interval with the reinforcing bar, and then concrete is poured into the columns, beams, walls, It is built integrally with structural members such as slabs. For this reason, the quality of the construction at the site affects the reliability, and also requires a formwork and a scaffold, which requires a lot of manpower and time for the construction. Further, in general, there are disadvantages such as a large cross section, a large own weight, and easy cracking and chipping.

[0003] Although prestressed concrete as a precast member has not been practically used yet, it has been widely used in most fields of civil engineering and building structures. At present, there are extremely many types of prestressed concrete products manufactured in factories, and prestressed concrete piles in particular have advantages such as light weight, high cracking safety, and high bending strength, and are used as structural members such as columns and beams. High aptitude. Further, since it is generally manufactured in a well-equipped factory, it has excellent features such as high quality and reliability of the product, mass production of precast members of the same shape and size, and low cost.

[0004] Accordingly, the present invention is to select a prestressed concrete material as a high-quality and inexpensive precast member produced in large quantities at a factory as a structural member,
Review the construction method and construction method of the column base when prestressed concrete is used as the column, and simplify the foundation structure of the column base of the prestressed concrete to facilitate construction and reduce construction costs. It was made for the purpose.

[0005]

In order to achieve the above object, the present invention is configured as follows.

That is, according to the first aspect of the present invention, a column base hole for accommodating a column base portion is provided in a footing foundation, and a column base portion of a precast concrete column is erected in the column base hole in an adjustable manner. A pillar base is characterized in that concrete is driven into the pillar hole to support the pillar portion of the precast concrete pillar. The invention according to claim 2 is the column base according to claim 1, wherein a ribbed steel pipe is wound around the column base of the precast concrete column.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sectional view of a column base of a prestressed concrete column as a precast member of the present invention. As the pillar base, a footing foundation 2 is installed under a slab 1. To the side of the footing foundation 2, foundation beams 3 in required directions are respectively connected. On the upper surface of the footing foundation 2, a column base hole 4 is punched out, and a column base 5a of a prestressed concrete column 5 is erected as shown in FIG.
Then, post-cast concrete 6 is driven into the column base hole 4 to fix the column base 5 a of the prestressed concrete column 5.

When a pile is required, an underground pile 7 is provided at the lower end of the footing foundation 2 as shown in FIG. Further, as shown in FIG. 4, the column base hole 4 may be provided in the base-winding concrete 8.

[0010] The column base of the present invention is configured as described above.
The upper structure mainly composed of the prestressed concrete column 5 above the lower leg of the column base and the lower structure thereunder are integrated to form a building structure.
When an underground pile 7 is provided, a prestressed concrete column 5
Since the underground pile 7 is connected to the underground pile 7, even if the construction accuracy of the underground pile 7 is not so good and a slight displacement occurs, the displacement can be adjusted at the time of installation.

When installing the column base 5a of the prestressed concrete column 5, as shown in FIG.
Place a concrete mass (bun) 9 at the bottom of the pan and adjust the depth level. The column base 5a of the prestressed concrete column 5 may be directly inserted into the column base hole 4 without using a stud. However, as shown in FIG. 10 may be rolled in. Thereby, the prestressed concrete column 5 and the post-cast concrete 6 are integrated, and the column base 5a can be more firmly fixed.

[0012]

The column base of the present invention is constructed as described above, and a column base of a prestressed concrete column is erected in the column base hole provided in the footing base, and concrete is driven into the column base hole to prestress. Fix the column base of the concrete column. Therefore, according to the present invention, since a pre-stressed concrete is used as a pillar, compared with a conventional reinforced concrete structure or a steel-framed building,
Lighter columns, higher cracking safety, greater bending strength,
It can be of high quality and cheap. In addition, since the column base is simply inserted into the column base hole and hardened with concrete, the construction is easy and no formwork or scaffolding is required, so that manpower and time can be reduced and the construction cost can be reduced. Further, since the column base is hardened with concrete instead of welding, high rigidity can be obtained without a problem of welding strength. In addition, by winding the ribbed steel pipe around the column base, the column base is integrated with concrete, and the degree of fixing of the foundation can be further enhanced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a column base of the present invention.

FIG. 2 is a perspective view when a prestressed concrete column is erected in a column base hole.

FIG. 3 is a cross-sectional view of a column base provided with a pile.

FIG. 4 is a cross-sectional view of a column base in which a column base hole is provided in root-wrapped concrete.

FIG. 5 is a cross-sectional view in which a block of concrete is placed at the bottom of a column base hole.

FIG. 6 is a perspective view of a prestressed concrete column in which a ribbed steel pipe is wound around a column base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slab 2 Footing foundation 3 Foundation beam 4 Pillar hole 5 Prestressed concrete column 6 Post-cast concrete 7 Underground pile 8 Root-wrapped concrete 9 Concrete block 10 Steel pipe with rib

Claims (2)

[Claims] 1. A footing foundation is provided with a pedestal hole for accommodating a pedestal portion, and a pedestal portion of a precast concrete column is erected in the pedestal hole so that concrete can be filled in the pedestal hole. A pedestal base, which is driven to support a pedestal portion of the precast concrete column. 2. The column base according to claim 1, wherein a ribbed steel pipe is wound around the column base of the precast concrete column.