JPH07180387A - Building method of rc spiral floor structure - Google Patents

Abstract

PURPOSE:To simplify work and shorten a construction process by erecting a temporary steel post at a position which envelops an RC spiral floor structure at a specified spacing and installing a leveling rule member to the temporary steel post along the spiral of the RC spiral floor structure. CONSTITUTION:Leveling rule members 9 and 10 are bent at a curvature equivalent to the outside diameter of a spiral slope to be constructed with a specified length and spirally connected, thereby forming the construction. Then, a required number of temporary peripheral posts 5 are erected on a virtual circumference at an equal spacing. A temporary post 4 is erected in the center. Then, Running- down way members 9 are laid out at the same pitch and further running-up way members 10 are installed to the posts 5 in such a fashion that their ends may be deviated to the base ends of the members 9 by 180 deg.. Inner cylinder post forms 11 and 12 are assembled preceedingly and a slab form is laid out at a specified position with accuracy by using the members 9 and 10 so that peripheral inverted forms 21 and 22 are assembled. This construction makes it possible to simplify and shorten work based on the simplification and accurate layout of the form 13.

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 an RC spiral floor structure such as a spiral slope used for moving a car to a parking lot provided on a high floor of a building.

[0002]

2. Description of the Related Art In recent years, in department stores and large supermarkets in urban areas, it is often not possible to secure a large parking space on the ground, and the roof or top floor of the building is used for this purpose. The importance of the spiral slope used as a means of providing a roadway to a high-floor parking lot is great.

By the way, since the spiral slope has an extremely complicated shape composed of a three-dimensional curved surface, it takes a lot of time and effort to construct it. It is difficult to adjust the position when arranging the slab formwork used for formation. That is,
The slab formwork is placed in a state of being supported by a plurality of columns (pipe supports) standing upright on the road surface that has already been completed, and for adjusting the position of the slab formwork (especially the outer part),
In order to make the slab formwork have a uniform slope, it is necessary to perform troublesome and troublesome work such as appropriately raising and lowering the height of the column in the circumferential direction and the radial direction.

Moreover, the positional accuracy of the slab formwork arranged by such a method is often not sufficient, which makes it difficult to construct a structure of excellent quality.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to enable the slab formwork to be accurately arranged at a desired position without the troublesome work of adjusting the position of the slab formwork, thus simplifying the work. Another object of the present invention is to provide a method for constructing an RC spiral floor structure which is excellent in workability and can shorten the construction period. An object of the present invention is a method for constructing an RC structure having a spiral floor surface, in which a temporary steel column is erected at predetermined intervals at a position surrounding the RC spiral floor structure to be constructed. A step, a second step of erection of the ruler member on the temporary steel column so that the ruler member used for positioning the slab formwork follows the spiral of the RC spiral floor structure, and a formwork for forming the inner cylindrical column. A third step of arranging, a fourth step of arranging a slab form using the ruler member in a section in which the internal cylinder column forming form is arranged, and a section in which the slab form is arranged And a sixth step of placing concrete in the space formed by each of the above-mentioned molds, and a fifth step of arranging the molds for forming the outer peripheral reverse beam portion in By repeating the process, an RC structure having a spiral floor surface at a predetermined height It is achieved by a method building a RC helical floor structure characterized by Rukoto.

That is, in the method for constructing an RC spiral floor structure of the present invention, the ruler members are previously arranged on the temporary steel frame columns at a predetermined gradient and pitch, and the slab formwork is arranged by using this. As a result, the slab formwork can be placed extremely accurately, and since this work is extremely simple, the tedious work of adjusting the position of the slab formwork is completely unnecessary, improving workability and shortening the construction period. The cost can be reduced.

The slab formwork is preferably arranged with a spacer interposed between the outer end of the slab formwork and the ruler member, which makes it extremely easy to remove the slab formwork. . Further, it is preferable that locking members are provided at predetermined intervals in the circumferential direction of the ruler member, and the lower end of the outer peripheral reverse beam forming mold is fixed by using this locking member, which simplifies the work of arranging the molds. The assembly strength can be increased.

Further, in the temporary steel column, it is preferable to connect adjacent ones and / or facing each other at a predetermined height by a connecting member, which effectively prevents the temporary steel column from collapsing. , The mutual positional relationship is less likely to be broken, and the ruler members can be arranged more accurately. Further, it is preferable to use the mold for forming the outer peripheral reverse beam portion for forming the outer peripheral reverse beam portion in the next layer portion, whereby the number of mold frames can be reduced and the cost can be further reduced.

Further, it is preferable that the ruler member for the ascending road and the ruler member for the ascending road are provided side by side on the temporary steel column,
Particularly, in an up-road slab and a down-road slab arranged by using an up-road ruler member and a down-road ruler member, the up-road slab (or the down-road slab that was constructed in advance) The road slab) serves as a foothold when constructing a down slab (or an up slab), and the above-mentioned up and down lanes are constructed alternately every half turn by repeating the required number of times. Is preferred.

[0010]

1 to 12 show an embodiment of a method for constructing an RC spiral floor structure according to the present invention. FIG. 1 is a plan view showing an installed state of a temporary structure, and FIG. 2 is a ruler member. FIG. 3 is a sectional view showing an arrangement state of (for a down road), FIG. 3 is a sectional view showing an arrangement state of a ruler member (for an up road), and FIG. 4 is a plan view showing a work section relating to construction of a down road. 5 is a cross-sectional view showing an arrangement state of the inner cylindrical column formwork (for the down road), FIG. 6 is a cross-sectional view showing the arrangement state of the slab formwork (for the down road), and FIG. Sectional drawing which shows the arrangement state of a frame (for a down road), FIG.
1 is an enlarged cross-sectional view of a contact portion between a ruler member and a slab formwork, FIG. 9 is a plan view showing a work section related to construction of an up road, FIG.
0 is a sectional view showing a state in which the ascending road formwork is arranged for half a round,
FIG. 11 is a cross-sectional view showing a state in which the down road formwork is further arranged for half a round, and FIG. 12 is a cross-sectional view showing a completed state of the spiral slope.

In each figure, 1 is an internal cylindrical column of a spiral slope (RC spiral floor structure), 2a and 2b are spiral lanes (slabs).
In particular, 2a is a roadway exclusively used for a descending vehicle, and 2b is a roadway exclusively for an ascending vehicle. Reference numerals 3a and 3b denote outer peripheral reverse beam portions that also serve as fall prevention guard walls, and are provided corresponding to the spiral roads 2a and 2b.

Outer wall columns that jointly support the upper lanes 2a and 2b with the inner cylindrical column 1 are provided at predetermined intervals on the outer peripheral reverse beam portions 3a and 3b. This portion is substantially the same as the conventional method. Since it is constructed in accordance with the above, the construction of the outer wall pillar portion will not be particularly mentioned. 4 is a temporary center pillar, 5 is H
A temporary outer peripheral pillar made of shaped steel, 6 is a connecting member radially arranged between the temporary center pillar 4 and the temporary outer peripheral pillar 5, 7,
Reference numeral 8 is a connecting member arranged in a loop between the temporary outer peripheral columns 5.

Reference numeral 9 denotes a ruler member, which is formed by spirally connecting members having a predetermined length bent with a curvature corresponding to the outer diameter of the spiral slope to be constructed. And the ruler member 9
Is installed between the temporary outer peripheral pillars 5 at a constant gradient, so that it is preferable that each ruler member 9 be three-dimensionally bent. However, if the gradient is not so large, there is no problem even if a flatly bent one is used.

10 is also a ruler member. In the spiral slope in which the upper and lower roads are independently provided in this embodiment, the ruler member 9 that makes 2.5 turns around the temporary center pillar 4 is used.
Is for the down road, and the ruler member 10 that goes around the temporary center pillar 4 twice is for the up road. Reference numerals 11 and 12 denote curved inner and outer molds used for forming the inner cylindrical column 1, and particularly the outer mold 12 is a portion where the inner cylindrical column 1 and the slab are joined (a portion indicated by a broken line in FIG. 5). ) Is notched, that is, the two parts are arranged separately.

Reference numeral 13 is a slab formwork, and this slab formwork 13 is an extendable telescopic beam 14 provided at predetermined intervals.
It consists of joists 15 and weirs 16. Reference numeral 19 is a spacer interposed between the ruler members 9 and 10 and the slab frame 13, and 20 is a spacer 19 in the ruler members 9 and 10.
It is a bolt protruding from the surface on which is not placed.

Reference numerals 21 and 22 denote inner and outer molds for forming the outer peripheral reverse beam portions 3a and 3b. The inner mold 21 includes a square pipe 23 and a weir plate 24, and the outer mold 22 includes a square pipe 25.
And the weir board 26. Incidentally, FIGS.
Regarding the formwork or the roadway formed in the front side portion with the temporary center pillar 4 interposed therebetween, the rough position thereof is shown by a two-dot chain line, and the opposite side portion is shown by a solid line. Also, FIGS. 2, 3, 5, 6, 7, 10, 11
Regarding the ruler members 9 and 10 arranged in the front side portion with the temporary center pillar 4 interposed therebetween, the rough position thereof is indicated by a one-dot chain line, and the opposite side portion is indicated by a solid line.

Numeral 27 is a column for positioning the outer peripheral reverse beam inner mold 21 on the slab mold 13 in a floating state, and 28 is an L-shaped piece attached to the lower end of the square pipe 25. The piece 28 is a bolt 2 protruding from the ruler members 9 and 10.
It is fastened to 0 with a nut 29. Reference numeral 30 denotes a foam tie used for arranging the outer peripheral reverse beam inner mold 21 and the outer peripheral reverse beam outer mold 22 in a state of being opposed to each other at a constant interval.

Reference numerals 31 are columns (pipe supports) used to support the slab formwork 13, which are installed at predetermined intervals in the radial direction and the circumferential direction, and are removed after the slab exhibits sufficient strength. Hereinafter, a method of constructing the RC spiral floor structure of the present embodiment will be described, but the construction of the foundation portion is substantially the same as the conventional method, and therefore will be omitted.

Prior to the construction of the spiral slope main body, a necessary number (for example, 12) of temporary outer peripheral columns 5 are erected at equal intervals on a virtual circumference that surrounds the spiral slope, and at the center of this. Set up the temporary center pillar 4. And
In order to enhance the stability, the temporary outer peripheral columns 5 facing each other are connected by the connecting member 6 via the temporary center column 4, and the connecting members 7 and 8 are annularly installed between the adjacent temporary outer peripheral columns 5. 1. Build a temporary structure as shown in 1.

However, the connecting members 6, 7, 8 are initially provided in the vicinity of the intermediate height position of the temporary outer peripheral column 5 and can be appropriately replaced upward as the work progresses. Next, as shown in FIG. 2, with respect to this temporary structure, the ruler members 9 for the down lane are arranged at the same gradient and the same pitch, and the ruler member 10 for the up lane is further attached to the base end thereof. Are arranged so as to be displaced by 180 ° with respect to the base end of the ruler member 9, and are arranged on the temporary outer peripheral column 5 as shown in FIG.

All the sectional views except FIG. 2 and FIG. 8 are sectional views passing through the temporary center column 4. For convenience, only two temporary outer peripheral columns 5 are shown in these sectional views, and
All the connecting members 6, 7 and 8 are omitted. Inside the temporary structure thus obtained, the construction of the spiral slope main body is carried out. This generally involves the inner cylindrical column forms 11 and 12 being assembled in advance to form the slab form 13. Is accurately arranged at a predetermined position by using the ruler members 9 and 10, the outer peripheral reverse beam part forms 21 and 22 are assembled, and finally the step of placing concrete in the form is repeated. Hereinafter, each step will be described in detail in order.

Inside the temporary structure, first, the construction work of the lowermost portion of the down road is performed in the section shown by the diagonal lines in FIG. In the shaded area, the rectangular portion that serves as a guide path from the spiral slope is implemented by the conventional method. In the donut shape part in the shaded area of FIG. 4,
As shown in FIG. 5, the inner and outer molds 11 and 12 are arranged by half the circumference, and reinforcement is applied to them.

Subsequently, as shown in FIG. 6, the slab mold 13 is made by using the ruler member 9 similarly to the inner / outer molds 11 and 12.
Only half of the circumference is arranged in a spiral shape, and this is supported by the pillars 31 for bar arrangement. Further, as shown in FIGS. 7 and 8, the outer peripheral reverse beam part forms 21 and 22 are arranged upright on the slab form 13 by using the columns 27 and the foam ties 30 to arrange the reinforcements. Give.

Here, the contact state between the ruler member 9 and the slab mold 13 is as shown in FIG. 8, that is, the slab mold 1
3 is placed on the ruler member 9 via the spacer 19, and the lower end of the outer peripheral reverse beam outer frame 22 is fixed to the bolt 20 protruding from the ruler member 9.
A spacer 19 is provided between the ruler member 9 and the slab formwork 13.
Since the spacer is interposed, a space can be formed between the ruler member 9 and the slab form 13 by pulling out the spacer 19, and the slab form 13 can be easily removed after the concrete is placed.

After all of the molds for half the circumference are arranged in this manner, concrete is poured into the molds and cured for a predetermined period. Subsequently, the work for constructing the lowermost part of the ascending road is performed in the section shown by the diagonal lines in FIG. In addition, in the shaded area, the rectangular portion that serves as a guide path to the spiral slope is implemented by the conventional method.

As to the construction of the donut-shaped up road portion, as shown in FIG. 10, the inner cylindrical columns 11 and 12 are arranged for a half circumference and the ruler member 10 is arranged, as in the construction of the down road portion described above. The slab formwork 13 and outer perimeter reverse beam part formwork 21 and 22 are arranged by using them, and the reinforcement is arranged, and concrete is placed in the formwork, whereby the upper and lower roads are each divided by half a circumference. Be built.

For the addition of roads, the roads that have been constructed and substantially cured are used as scaffolds. That is, as shown in FIG. 11, the inner cylinder pillar forms 11, 12 for the half circumference, the slab form 13, and the outer perimeter reverse beam part forms 21, 22 are mounted on the up road 2b using the ruler member 9. The scaffolds are arranged spirally and concrete is poured. The road formed by this concrete pouring is the down road 2a.

Since a large load does not act on the outer peripheral reverse beam portions 3a and 3b, it is possible to remove the mold at an early stage. Therefore, regarding the outer peripheral reverse beam portion forms 21 and 22 used at the time of expansion,
Since the one used for the first time is diverted, it is not necessary to prepare a large amount of formwork, and the cost is low. Further, the inner cylindrical column forms 11 and 12, the slab form 13 and the columns 31 are also appropriately removed after the strength of the concrete has developed, and are used for constructing the roadway in the upper layer portion.

Further, in the same manner as the down road 2a shown in FIG. 11, the up half road 2b for the next half turn is formed, whereby the up road 2b for one round is completed. After that, the construction of the half way around the up and down road as described above is repeated alternately [two times for the up road 2b (one cycle) and three times for the down road 2a (one half way). 12), and finally the spiral slope as shown in FIG. 12 is completed, and the temporary columns 4, 5 and the connecting members 6, 7,
8 and the ruler members 9 and 10 are removed.

According to the method for constructing the RC spiral floor structure of the present invention, the slab formwork can be arranged easily and with high accuracy by the ruler member, and therefore the troublesome work of adjusting the position of the slab formwork can be performed. Since it is completely unnecessary, the work can be simplified and the construction period can be shortened. Moreover, not only the slab formwork,
Since the ruler member can also be used to position and fix the outer peripheral reverse beam form, the construction work can be further saved.

In this embodiment, in order to enhance safety, the construction of the spiral slope in which the upper and lower lanes are separated and independent has been described. However, when the lane is set to the upper and lower lanes by increasing the width, etc. Since the roadway is composed of one continuous slab, only one ruler member is required as shown in FIG. 2. In this case, the formwork is assembled one revolution at a time, and Just pour concrete.

[0032]

[Effects] According to the present invention, the slab formwork can be accurately arranged at a predetermined position without performing a troublesome work of adjusting the position of the slab formwork, and the work can be simplified and the construction period can be shortened. Yes, excellent workability.

[Brief description of drawings]

FIG. 1 is a plan view showing an installed state of a temporary structure.

FIG. 2 is a cross-sectional view showing an arrangement state of a ruler member (for a down road).

FIG. 3 is a cross-sectional view showing an arrangement state of a ruler member (for an up road).

FIG. 4 is a plan view showing a work section related to construction of a down road.

FIG. 5 is a cross-sectional view showing an arrangement state of an inner cylindrical pillar formwork (for a down road).

FIG. 6 is a cross-sectional view showing an arrangement state of a slab formwork (for a down road).

FIG. 7 is a cross-sectional view showing an arrangement state of outer peripheral reverse beam part formwork (for down road).

FIG. 8 is an enlarged sectional view of a contact portion between a ruler member and a slab form.

FIG. 9 is a plan view showing a work section related to construction of an up road.

FIG. 10 is a cross-sectional view showing a state in which the ascending road formwork is arranged for a half circumference.

FIG. 11 is a cross-sectional view showing a state in which the down road formwork is further arranged for half a circumference.

FIG. 12 is a cross-sectional view showing a completed state of the spiral slope.

[Explanation of symbols]

 1 Inner tube pillar 2a, 2b Spiral road 3a, 3b Outer circumference reverse beam part 4 Temporary center pillar 5 Temporary outer circumference pillar 6, 7, 8 Connecting member 9, 10 Ruler member 11, 12 Inner tube pillar formwork 13 Slab formwork 19 Spacer 20 Bolts 21, 22 Outer perimeter reverse beam part formwork

Claims (7)

[Claims] 1. A method of constructing an RC structure having a spiral floor surface, which comprises a first step of erected temporary steel columns at predetermined intervals at a position surrounding the RC spiral floor structure to be constructed. ,
The ruler member used for positioning the slab formwork is the RC
A second step of erection of a ruler member on the temporary steel frame pillar so as to follow the spiral of the spiral floor structure; a third step of arranging a formwork for forming an inner cylinder pillar; and a formwork for forming the inner cylinder pillar. A fourth step of arranging a slab form using the ruler member in the section where the slab is arranged, and a fifth step arranging a form for forming the outer peripheral reverse beam portion in the section where the slab form is arranged. R including a step and a sixth step of placing concrete in a space formed by each of the above-mentioned molds, and repeating the above step as necessary to have a spiral floor surface at a predetermined height.
A method for constructing an RC spiral floor structure, which is a C structure. 2. The method for constructing an RC spiral floor structure according to claim 1, wherein the slab formwork is arranged with a spacer interposed between the outer end of the slab formwork and the ruler member. 3. The locking member is provided at a predetermined interval in the circumferential direction of the ruler member, and the lower end of the outer peripheral reverse beam portion forming frame is fixed by using this locking member. Item 2
Method of constructing RC spiral floor structure. 4. The RC spiral floor structure according to claim 1, wherein, in the temporary steel column, adjacent ones and / or opposite ones are connected by a connecting member at a predetermined height. How to build. 5. The method for constructing an RC spiral floor structure according to claim 1, wherein the formwork for forming the outer peripheral reverse beam portion is used for forming the outer peripheral reverse beam portion in the next layer portion. . 6. The method for constructing an RC spiral floor structure according to claim 1, wherein a ruler member for an up road and a ruler member for a down road are provided in parallel with a temporary steel frame column. 7. An up-road slab and a down-road slab arranged by using an up-road ruler member and a down-road ruler member. The slab (or the slab for the down road) serves as a scaffold when constructing the slab for the down road (or the slab for the up road),
The method for constructing an RC spiral floor structure according to claim 6, wherein the construction of the ascending road and the constructing of the descending road are alternately repeated every half cycle for a required number of times.