JPH06185084A - Basement floor body structure of building - Google Patents

Abstract

PURPOSE:To reduce the period and cost of a constitution employing the reverse placing process. CONSTITUTION:Girders 2 below the first floor are made of steel structure (S made) and columns are made of RC having a permanent substructure column 3 (temporary post) in the inside. The girders 2 made of S are connected to the column with high-tension bolts. The floor slab 7 is placed by a construction method without use of posts. And also construction works such as forms of beam, bar arrangement erection of struts supporting forms for placing concrete and floor slabs, reinforcement of the ground for posts, are not necessary. Moreover, the joint work of the girder 2 made S and the structural post 3 is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure such as a frame in a basement of a building (a basement frame constructed by a reverse driving method).

[0002]

Prior Art and Problems to be Solved by the Invention
Conventionally, as the structure of the basement structure of this type, reinforced concrete construction (RC construction) is used even in the construction employing the reverse driving method.
Steel reinforced concrete construction (SRC construction) is often adopted.

However, the base structure of the basement is made of RC or SRC.
The construction requires a long construction period and high construction cost.

The present invention was devised in view of the above-mentioned circumstances, and an object thereof is to provide a basement structure structure for a building which can reduce the construction period and cost of the construction employing the reverse driving method. It is in.

[0005]

According to the basement skeleton structure of the present invention, the large beams below the first floor are made of steel frame (S) and the pillars are made of RC having built-in true pillars (temporary pillars). In addition, the S-structured girders are joined to the true columns with high-strength bolts (as for the gusset plate with the true columns and the web plate of the girders). In addition, the floor slab will be constructed without columns.

[0006] By adopting such a basement skeleton structure, beam formwork, bar arrangement work and concrete work are unnecessary. In addition, it is not necessary to construct a pillar to support the formwork of the floor slab or to reinforce the ground supporting the pillar. Further, it is possible to simplify the work of joining the S-structured large beam and the true column.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The basement structure of a building according to the present invention will be described below with reference to the illustrated embodiments.

In the basement structure structure 1 (see FIGS. 1 to 5) of the building 4, the girders 2 below the first floor are made of steel frame and
The pillar is made of reinforced concrete with a built-in structure pillar 3 (temporary pillar), the steel-framed large beam 2 is the structure pillar 3, and the connection is a gusset plate 5 with a steel pillar and a web plate 6 of the large beam. The floor slab 7 is bolted, and a construction method that does not require columns is used.

Construction of a building employing the basement frame structure 1 having such a structure is carried out as follows.

First, immediately after the concrete is cast into the cast-in-place concrete pile 8 (while the ready-mixed concrete is not set), the true-column 3 is erected at a predetermined position. In addition, the gusset plate 5 is attached to the structure pillar 3 in advance at the factory.

Next, after the first root cutting, the S-shaped large beam 2 on the first floor
Is attached to the structure pillar 3 and the slab on the first floor is constructed. In addition, the mounting method is the gusset plate 5 of the true column mounting.
Then, the web plate 6 of the steel frame beam is bolted with high strength.

The bolt hole in this high-strength bolt connection is generally circular, but it may be a loose hole in the horizontal direction in consideration of poor installation accuracy of the true column 3. This loose hole may be the case of only the gusset plate 5, the case of only the steel frame beam, or the case of both.

Next, after the secondary root cutting, the S-shaped large beam on the first basement floor is attached to the structure pillar 3, and the slab on the first basement floor is constructed. The joining method is the same as that used when the S-beams 2 are attached to the true columns 3 described above.

Then, even when the basement is on the third floor or above, the above-mentioned work is repeated. In addition, regardless of whether the structure column 3 is H-shaped steel, square steel pipe, or round steel pipe, the construction method and the structure column 3
And the method of joining the S beam is the same.

[0015]

According to the present invention, the construction period required for the basement frame construction work can be significantly shortened and the construction cost (cost) required for the basement frame construction work can be reduced. Further, since the formwork, rebar work and concrete work are significantly reduced, it is possible to reduce the number of site workers.

Further, the amount of construction waste (particularly, the mold material that cannot be used) is reduced, and the amount of material to be carried into the site can be reduced. Moreover, even in the case of rain, excavation work of soil and skeleton work of the basement can be performed.

[Brief description of drawings]

FIG. 1 is a schematic view showing a basement structure structure of the present invention.

FIG. 2 is an enlarged view of part A in FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a schematic view showing another embodiment of the basement skeleton structure of the present invention.

5 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

1 ... Basement frame structure, 2 ... Large beam, 3 ... Structural column, 4 ... Building,
5 ... Gusset plate, 6 ... Web plate, 7 ... Floor slab, 8 ... Cast-in-place concrete pile.

Claims (1)

[Claims] 1. A girder below the first floor is made of steel frame,
The columns are made of reinforced concrete with built-in structure columns (temporary columns), the steel-framed large beams are attached to the structure columns, and the connection is a high-strength bolt connection between the gusset plate with the structure columns and the web plate of the beam. The floor slab has a basement structure of a building characterized by adopting a construction method that does not require columns.