JPH0754352A - SC foundation beam - Google Patents

Abstract

PURPOSE:To construct a footing beam dispensing with the demolition of a form by erecting lateral steel sheathing boards on concrete sub-slab in a cut ditch through plural tie-plates, and arranging reinforcements between these sheathing boards to place concrete. CONSTITUTION:Concrete sub-slab 2 of specified thickness is placed at the bottom part of a cut ditch 1 excavated into ditch shape of the specified depth. On this concrete sub-slab 2, tie-plates 4 are fitted by welding to the upper end parts and lower end parts of steel sheathing boards 3, 3, being spaced by the specified distance, parallelly along the continuous direction of the cut ditch 1. Reinforcements 5 are arranged at the upper end parts and lower end parts between the sheathing boards 3, 3 and fixed to the tie-plates 4, and the upper and lower reinforcements 4 are arranged in such positions as to secure sufficient covering depth of concrete 6. Concrete is placed between the lateral sheathing boards of a form of such constitution, and form release-removal work after hardening is dispensed with. Constructing performance is thereby improved, and a construction period is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate concrete foundation beam (hereinafter referred to as "SC foundation beam") constructed by placing concrete in a box-shaped steel sheet assembled in a box shape.
Said).

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a foundation beam of a building, a method of using a wire mesh or a steel plate for a side plate of a form has been generally known. Further, as a method of constructing a beam on the ground floor, a method of using a box-shaped steel plate formed in a U shape is known.

However, the method of using a wire mesh or a steel plate as the side plate of the form involves the assembling and disassembling work of the form, and therefore the construction period cannot be shortened so much as compared with the conventional method of using the wooden plate as the side plate.

Further, in the method using the U-shaped steel plate, in many cases, the steel plate is formed in a corrugated plate shape in order to give the steel plate rigidity. For this reason, if this type of U-shaped steel plate is installed as a formwork for foundation beams on discarded concrete, the U-shaped steel plate is supported on the discarded concrete in a point contact state, so that the portion in contact with the discarded concrete There was a problem that the load was concentrated only on

The present invention has been made to solve the above problems, and an object thereof is to provide an SC foundation beam capable of improving workability and greatly shortening the construction period.

[0006]

An SC foundation beam according to the present invention is installed between left and right steel weir plates that are erected in parallel on waste concrete in a root cutting groove, and between these left and right steel weir plates. , Including a plurality of tie plates connecting the left and right steel weir plates, a reinforcing rebar arranged between the left and right steel weir plates, and concrete cast between the left and right steel weir plates It is configured.

[0007]

【Example】

Example 1. 1 (a), (b) and FIG. 2 show the S according to the present invention.
An example of a C foundation beam is shown, and in the figure, reference numeral 1 is SC
A root cutting groove excavated in a groove shape of a predetermined depth to construct a foundation beam, 2 is a waste concrete cast at a bottom of the root cutting groove 1 to a predetermined thickness, and 3 is a top of this waste concrete 2. The steel weir plates, which are erected in parallel with each other along the continuous direction of the root cutting groove 1 and separated by a predetermined distance, are left and right steel weir plates 3, 3
A tie plate which is installed between the left and right steel weir plates 3 and 3 in parallel, and 5 is a reinforcing bar (main bar) arranged between the left and right steel weir plates 3 and 3, and reference numeral 6 is left and right. This is concrete placed between steel barrier plates 3 and 3.

The right and left steel dam plates 3 are each formed in a rectangular plate shape, and the steel dam plates 3, 3 adjacent to each other in the continuous direction of the root cutting groove 1 are integrally connected by welding.

The tie plates 4 are installed at the upper and lower end portions between the left and right steel dam plates 3 and 3, respectively.
Each is attached by welding.

Reinforcing bars (main reinforcing bars) 5 are arranged at the upper end and the lower end between the left and right steel dam plates 3, 3 and are fixed to the tie plate 4 by binding them with binding wires. Further, the upper and lower reinforcing reinforcing bars 4 are arranged at positions where a sufficient covering thickness of the concrete 6 can be secured.

The left and right steel weir plates 3, the tie plate 4, and the reinforcing bars (main bars) 5 may be assembled one by one on the discarded concrete 2, but these should be assembled in advance in a factory or the like. At the site, if a construction method such as just installing on the discarded concrete 2 is adopted, the work space required for assembling the steel dam plate 3 etc. may be extremely small, which reduces excavated soil and construction. The sex can be greatly omitted.

Example 2. 3 (a), (b) and FIG. 4 show another embodiment of the SC foundation beam according to the present invention. In the drawings, the same parts as those of the first embodiment are designated by the same reference numerals and their description is omitted. To do.

Reference numeral 7 is an alternative to the reinforcing bar 5 and is a reinforcing steel bar having a rectangular cross section. This reinforcing steel bar 7
Are attached to the upper and lower edge portions of the left and right steel dam plates 2, 2 along the longitudinal direction of the steel dam plate 2. It should be noted that the surface of the reinforcing steel rod 7 may be provided with unevenness or a stud may be provided so as to enhance adhesion with the concrete 6.

[0014]

Since the present invention is constructed as described above, there is no work of dismantling and removing the formwork, so that there is an effect that the workability can be improved and the construction period can be greatly shortened.

Further, since the left and right steel dam plates are a part of the structure of the SC foundation beam, it is possible to economically construct by remarkably reducing the amount of reinforcing bars that should be originally arranged. There is.

[Brief description of drawings]

1A is a plan view of an embodiment of an SC foundation beam according to the present invention, and FIG. 1B is a sectional view taken along the line I-I in FIG. 1A.

FIG. 2 is a sectional view taken along the line ΙΙ-ΙΙ of the SC foundation beam shown in FIG. 1 (a).

3A is a plan view of an embodiment of an SC foundation beam according to the present invention, and FIG. 3B is a sectional view taken along the line I-I in FIG. 3A.

FIG. 4 is a sectional view taken along the line ΙΙ-ΙΙ of the SC foundation beam shown in FIG. 3 (a).

[Explanation of symbols] 1 ... Root cutting groove, 2 ... Waste concrete, 3 ... Steel dam plate,
4 ... tie plate, 5 ... rebar (main bar), 6 ... concrete, 7 ... reinforced steel rod.

Claims (1)

[Claims] 1. A left and right steel weir plate that is erected in parallel on the waste concrete of the root cutting groove, and a plurality of left and right steel weir plates installed between the left and right steel weir plates. An SC foundation beam comprising a tie plate, reinforcing reinforcing bars arranged between the left and right steel dam plates, and concrete cast between the left and right steel dam plates.