JP2702778B2 - How to build a steel staircase - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of constructing a steel frame staircase when it is erected in a form surrounded by a reinforced concrete wall having a central partition wall.

Conventional technology Conventionally, in the case of temporary construction of steel stairs provided in a steel-framed building, a temporary beam or girder for support is generally bridged over the surrounding space to support each floor, or to support each floor, or
One of the methods of erecting and supporting temporary pillars for support in the stair construction area as in Japanese Patent Publication No. 58-51104 and Japanese Patent Publication No. 58-36142 is adopted. Used as a work passage.

However, in the case where the steel stairs are constructed in a manner surrounded by the outer reinforced concrete walls including the central partition wall, the above-mentioned conventional means has a reinforced concrete wall around the stairs. However, since a stair load can be applied to these walls at the time of main construction, it is not necessary to provide steel beams and columns for temporary construction without using this structure. There is a problem that it leads to complexity, an increase in the amount of steel frames, and an increase in required space.

An object of the present invention is to provide a construction method capable of bridging temporary small beams or girders for each floor having a problem as described above and performing temporary support without having to erect temporary columns. .

"Means for Solving the Problems" In order to achieve the above object, in the method for constructing a steel staircase of the present invention, after a steel frame is built on a predetermined unit floor of the main body, the beam is changed from a girder of a stair building area on the top floor to a girder. The temporary beam is suspended over the partition concrete wall at the center of the stairs, the rope is suspended from the temporary beam, the steel stairs are suspended via the rope, and the beam Shoulder holding and temporary support, then, when placing concrete around the stairs at the same time as placing the concrete in the body, burying the rope and supporting the steel frame stair load on the concrete wall around the stairs It is.

The rope may be a reinforcing bar with a turnbuckle.

[Operation] In the construction method configured as described above, the steel stairs can be supported temporarily on the concrete wall around the stairs at the time of temporary or permanent construction, which is reasonable. Since it is suspended on the concrete wall at the center of the stairs, it does not interfere with the construction of the concrete wall, does not increase the amount of steel frames, and is necessary for temporary support. Because it does not increase the space, and furthermore, in the case of permanent construction by placing concrete around the stairs, it is sufficient to bury and kill without removing it,
Easy to work.

When the rope is a rebar with a turn buckle, it is convenient because the level can be finely adjusted easily.

"Example" An example will be described with reference to the drawings. In Fig. 1, after a predetermined unit floor of a steel frame 1 of a main body of a building with a steel reinforced structure is constructed (normally, the building is performed every three layers). As shown in FIG. 2, a temporary beam member 3 such as H steel is laid over the large beam 2 from the large beam 2 on the top floor of the section surrounding the steel stairs.

The bridging position of the temporary beam 3 is made to coincide with the partition concrete wall at the center of the steel frame stairs.

From the beam member 3, as shown in FIG. 3, a rope member 4, such as a reinforcing bar with a turn buckle, a chain, a wire, etc., is suspended, and the center of the reinforcing bar stage 5 is fixed to the suspension.

On the other hand, the periphery of the steel staircase 5 is shouldered by the beam aggregates 6,... And the interposition support members 7,.

Thus, a stable temporary construction is achieved and the work can be performed.
In Fig. B, reference numeral 8 denotes a formwork of a concrete partition wall at the center.

As the cord material 4, one having an adjusting function is suitable for level adjustment, and a rebar with a turnbuckle shown in the figure is preferable.

Next, as shown in FIG. 4, simultaneously with the concrete placement of the main body, the concrete placement of the outer peripheral concrete wall 9 including the central partition concrete wall 9a is carried out, and at this time, the rope 4 is buried in the concrete wall 9a. .

According to the above construction procedure, as shown in FIG. 5, a steel staircase 5 surrounded by an outer concrete wall 9 having a central partition wall 9a can be provided in a building 10.

[Effect of the Invention] Since the present invention is configured as described above,
The following effects are obtained.

(1) There is no need to provide beams or self-supporting supporting columns that interfere in the stair building area, and the existing steel stairs can be almost simply installed by hanging, so that the work is simple.

(2) Since the above-mentioned steel members as beams and columns are not required,
Cost reduction.

(3) The rope material for temporarily supporting the steel frame stairs is buried in the wall and is easily settled.

[Brief description of the drawings]

FIG. 1 is an explanatory view of how to build a steel frame of a building, FIG. 2 is an explanatory view of erection of temporary beams in a stair building area in the present invention,
3a to 3c are plan views of a steel frame staircase at the time of temporary construction according to the present invention, FIG. 3a is a view taken along arrow bb and cc, and FIG. FIG. 5 is an explanatory view of concrete placement of a wall, and FIG. 5 is a plan view when a building is completed. DESCRIPTION OF SYMBOLS 1 ... steel frame, 2 ... giant beam, 3 ... temporary beam material, 4 ... rope material, 5 ... reinforced stairs, 6 ... beam aggregate material, 7 ... interposition support member, 8 ... formwork, 9 …… Concrete wall around the stairs, 9a…
… Center concrete wall, 10 …… Building.

Claims (2)

(57) [Claims] After a steel frame is built on a predetermined unit floor of a main body, a temporary beam is laid over a large beam in a stair building area on the top floor in accordance with the position of a partition concrete wall at the center of the stairs. Hanging the rope from the beam, suspending the steel stairs via the rope, holding the beam on each floor by shoulders and temporarily supporting it, and then placing the concrete around the stairs at the same time as placing the concrete in the main body A method of constructing a steel frame staircase, comprising: burying the cable material and supporting the steel frame stair load on the concrete wall around the staircase when installing the steel frame staircase. 2. The method according to claim 1, wherein the rope is a reinforcing bar with a turnbuckle.