JP3323624B2 - Construction method of PC stairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing outdoor and indoor PC stairs.

[0002]

2. Description of the Related Art Conventionally, in this type of construction method, the basics,
The assembling of stair post members, floor members and stair members, as well as the processing of reinforcing bars, arranging reinforcing bars, and placing concrete are performed on-site at the same time as other skeletons.

[0003]

As described above, the conventional construction method requires complicated work and assembling of the formwork and the reinforcing bar because of the on-site construction. For concrete casting,
High quality concrete casting is not possible due to the cut in the middle wall of the floor. In addition, since a scaffold for construction is required, external construction around the stairs cannot be performed. There is also a problem that the frame cannot be used for construction stairs for construction directly above the floor because of simultaneous construction.

[0004] The present invention has been proposed in view of the above-mentioned problems of the prior art, and the object thereof is to standardize members, improve workability, and provide an economical PC stairs construction method. The point is to provide.

[0005]

In order to achieve the above object, according to the method for constructing a PC staircase according to the present invention, a vertical reinforcing bar provided with a joining sleeve at the lower end is built in, and a corner portion is provided at the corner. The lowermost wall PC among the wall PC members having the cutouts
After the members are erected on the foundation and fixed via the reinforcing bars protruding on the foundation and the sleeve of the wall PC member, landings and beams are provided at the lower and upper cutouts of the wall PC member. Engages the integrated floor PC member with beams, and penetrates the sleeve buried in the floor PC member through a vertical reinforcing bar extending from the foundation and the lowermost wall PC member to cantilever the same wall PC member. And a wall PC on the upper floor on the same wall PC member
A step of embedding members and connecting them via the vertical reinforcing bar and the sleeve, and a step of connecting and connecting a PC stair member between the floor PC members with beams facing up and down, and thereafter repeating the above steps. .

[0006]

According to the present invention, there is provided a wall PC member having a built-in vertical reinforcing bar provided with a joining sleeve at a lower end and having a cutout at a corner, and a floor PC member with a beam in which a landing and a beam are integrated. And a PC step member, the wall PC member is erected on the foundation, and the upper and lower walls P are connected via a vertical reinforcing bar and a sleeve.
By joining the C members, one continuous staircase wall member was formed, and the floor PC member with the beam, in which the landing configuration floor was integrated in a cantilever shape, was connected to the cutout portion of the wall PC member. Thereafter, the PC stair members are erected between the floor PC members with beams that are vertically opposed to each other, whereby stairs are constructed by a dry method using the PC members, and the floor PC with beams is constructed by the wall PC members. It supports the load of the members and the PC stairs, and the landing PC of the stairs is constituted by the floor PC members with the beams, and the stairs are raised and lowered by the PC stair members erected between the floor PC members with the beams facing up and down. is there.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. A is a wall PC member having a built-in vertical reinforcing bar 2 having a joining sleeve 1 at a lower end, and an upper end of the reinforcing bar 2 protruding from an upper surface of the member. Further, cutouts 3 are provided at upper and lower corners of the member A.

[0008] B is a floor PC member with a beam, a landing 4 and a beam 5
Are integrated with each other, a sleeve 6 is embedded in the beam 5 of the member B, and a falling-off preventing reinforcing bar 7 is provided upright at a cutout step provided at the leading edge of the beam 5 portion. C is a PC staircase member, and a fall-off prevention sleeve 8 is embedded at upper and lower ends. Then, each of the PC members is carried into the site, the lowermost wall PC member A is built on the foundation D, and the vertical reinforcing bar 2 protruding from the foundation D is provided.
Is fitted into the sleeve 1 of the wall PC member A and filled with mortar, and the lowermost wall PC member A is fixed to the foundation D.

After the lowermost wall PC member A is erected on the foundation D, the floor PC member B with a beam is engaged with the upper and lower cutouts 3 of the member A, and the lower wall PC member A is engaged with the sleeve 6 of the member B. The floor PC member B with a beam penetrates the vertical reinforcing bar 2 extended from the foundation D and the lowermost wall PC member A, and is framed in a cantilever manner via the support E. Then, on the lowermost wall PC member A, An upper wall PC member A 'is erected, and a vertical reinforcing bar 2 extended from the lowermost wall PC member A is fitted into a sleeve 1 of the upper wall PC member A' and grouted, and the wall PC members A and A 'are joined together. At the same time, the beam 5 of the floor PC member B with beams on the upper floor is sandwiched between the upper and lower wall PC members A and A ', and the mortar 9 is filled between the members A and A' and the beam 5. And a PC step member C is erected between the beams 5 of the floor PC member B with beams that are vertically opposed to each other. Engage the captive reinforcement 7 of the member B makes a successful prevention sleeve 8, the PC stair member C is filled with a mortar 9a, it is fixed to the beam with the floor PC member B.

The above steps are repeated to form a PC staircase.

[0011]

According to the present invention, the PC stairs are connected to the wall PC member,
Floor PC members with beam and PC stair members are manufactured in advance in the factory, and each member is carried to the site and assembled to eliminate the need for processing, assembling, assembling, and concrete casting at the construction site. Temporary scaffolding is not required, so simultaneous construction of exterior construction is possible.

In addition, since stair construction can be performed prior to the building body, the PC stairs constructed according to the present invention can be used as construction stairs. Since the stair members are PC members, a high quality and uniform product can be obtained. Thus, finishing work such as mortar finishing becomes unnecessary, workability is improved, and it is economical. In particular, in the present invention, a cantilever floor plate having a cantilever is formed by attaching a floor PC member with a beam to a PC wall member, and the floor PC member with a beam is used as a stair landing and used for erection of a stair PC member. It can be.

[Brief description of the drawings]

FIG. 1 is a side view of a PC staircase constructed by the method of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a view taken along arrows in FIG. 2;

FIG. 4 is a side view of a wall PC member.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a plan view of FIG. 4;

FIG. 7 is a plan view of a floor PC member with beams.

8 is a roro view as seen from the arrow in FIG. 7;

FIG. 9 is a view taken along the arrow line in FIG. 7;

FIG. 10 is a side view of a PC step member.

FIG. 11 is a plan view of FIG. 10;

FIG. 12 is a partially enlarged view of FIG. 10;

[Explanation of symbols]

 Reference Signs List A wall PC member B floor PC member with beam C PC stair member D foundation 1 sleeve 2 vertical rebar 3 cutout 4 landing 5 beam 6 sleeve 7 fall prevention rebar 8 fall prevention sleeve 9 mortar

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04F 11/02

Claims (1)

(57) [Claims] 1. A wall PC member having a built-in vertical reinforcing bar having a joining sleeve at a lower end and having a cut-off portion at a corner portion, a lowermost wall PC member is built on a foundation, and A floor PC with a beam in which a landing and a beam are integrated with each other at the lower and upper cutouts of the wall PC member after being fixed via a reinforcing bar projecting on a foundation and a sleeve of the wall PC member. Engaging the member, penetrating a vertical reinforcing bar extending from the foundation and the lowermost wall PC member into a sleeve embedded in the floor PC member, and frame the wall PC member in a cantilever manner; P
A step of laying a wall PC member on the upper floor on the C member and connecting it via the vertical reinforcing bar and the sleeve, and a step of erection and connecting a PC stair member between the floor PC members with beams vertically opposed to each other. And a method for constructing a PC staircase, comprising repeating the above steps.