JP3519467B2 - Construction method of basement and integrated foundation - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base structure integrated with a basement in which a foundation of an upper building for constructing a building of a different structure above a basement made of RC is integrated with the basement, and a construction method thereof. is there.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 4-4038 discloses, as a building material for a basement, a bottom frame on which an inner box serving as an inner formwork of the basement is placed,
A structure in which a pair of first short side frames that form the outer formwork of the basement are attached at right angles to the bottom frame, and a second long side frame that is assembled to this structure adjacent to the first short side frame Is disclosed. In this basement building material, the accuracy can be improved by factory production in advance, and the first or second side frame can be attached on site, so the work time when constructing the basement can be shortened and the cost can be saved. Is to have.

The above technique is merely a building material for constructing a basement, and there is no idea that the foundation of a building constructed above the basement is integrally constructed. For this reason, when constructing the foundation of the upper building, after making reinforcements in advance and placing concrete to cure it, the reinforcements exposed at the top of the ceiling slab in the basement are used again to construct the superstructure. The foundation of the building will be constructed, or the foundation of the superstructure will be constructed at a position away from the basement.

[0004]

In the above technique, since the foundation of the basement and the upper building are constructed in separate steps, the work is complicated and complicated, and the construction period is inevitably long.

There is also a problem that it becomes difficult to obtain the required strength because the basement and the foundation of the upper building are separated. In order to solve this problem, it is necessary to construct a basement corresponding to the position of the foundation of the upper building, which leads to the problem of affecting the design of the basement itself.

[0006] An object of the present invention is to construct a foundation structure for a basement and an upper building, which is simple in construction, shortens the construction period, and can improve the strength. And to provide a construction method thereof.

[0007]

[MEANS FOR SOLVING THE PROBLEMS] In order to solve the above-mentioned problems, a method of constructing a basement and an integral foundation according to the present invention is to reinforce the ceiling slab of the basement and to construct the foundation of the building to be constructed above the basement. It is characterized by installing the rebar and the formwork to be constructed, and then placing concrete to integrally construct the basement and the foundation of the building to be constructed above the basement.

In the above-mentioned construction method, it is preferable to install on the upper surface of the ceiling slab formwork of the basement a support which supports the formwork forming the foundation of the building to be constructed above the basement.

[0009]

[Operation] In the construction method of the above-mentioned basement and the integrated foundation (hereinafter simply referred to as "construction method"), after the reinforcements of the ceiling slab of the basement and the reinforcements and formwork that form the foundation of the upper building are installed, concrete It is possible to integrally construct the basement and the foundation of the building to be constructed above the basement by placing. Therefore, the work of arranging the formwork, the work of arranging the bar and the work of placing the concrete on the basement and the foundation of the upper building can be performed at one time in a continuous process.

Further, by installing the receiving object on the upper surface of the ceiling slab formwork in the basement, the receiving object can support the formwork forming the foundation of the building to be constructed above.

[0011]

EXAMPLES Examples of the above construction method will be described below with reference to the drawings. Fig. 1 is a floor plan showing an example of the relationship between the basement and the foundation of the upper building, Fig. 2 is a sectional view showing a part along the line II-II of Fig. 1, and Fig. 3 is a schematic drawing of the procedure of the construction method. 5 is a schematic perspective view of the basement unit, FIG.
1 is a diagram for explaining the formwork and bar arrangement of the basement and foundation, and FIG.
Fig. 6 is a view showing a part of a cross section taken along line VV of Fig. 6, and Fig. 6 is a perspective view showing the relationship between the reinforcement of the ceiling slab in the basement and the reinforcement of the foundation.

First, the basic structure will be described with reference to FIGS. In the figure, a basement portion A (basement A) has an RC structure, and a building having a structure different from the RC structure (for example, a wooden structure, a steel frame structure, etc.) is built on the basement A. . The basement A has a smaller area than the upper building, and the basement A and the foundation B of the upper building are integrally formed.

A part of the foundation B which is formed on the upper part of the basement A (upper part of the basement 1a) is integrally formed with the ceiling slab 2 of the basement A, and the other part (general part 1b).
The rising part is formed continuously with the rising part of the basement upper part 1a, and the cloth part is formed continuously with the ceiling slab 2. Therefore, there is no discontinuity between the foundation B and the basement A, the familiarity of concrete is good and the foundation B
It is possible to reasonably support not only the base B but also the basement A with the vertical and horizontal loads acting on the base. Therefore, the strength of the foundation B can be improved.

Next, the procedure of the construction method according to this embodiment will be described with reference to FIGS. First, as shown in FIG. 3A, the excavation portion 11 is constructed by excavating a position where the basement A is to be constructed to a predetermined depth. At the same time, general section 1
Also excavate the part that builds b.

Next, as shown in FIG. 1B, a form C for constructing a basement A which is constructed on the ground in advance (contains a plurality of forms 12 and 13 and a rebar 14 which will be described later). Formwork,
Hereinafter, "basement unit C") is installed in the excavation unit 11.

As shown in FIG. 4, the basement unit C defines the interior of the basement A and a box-shaped inner formwork 12 which serves as a base for the interior and an outer wall portion and is buried in the ground. The outer formwork 13 is formed, and is assembled in advance in the factory in a state where the reinforcing bars 14a of the wall portion are arranged.
The basement unit C is appropriately divided into a plurality of structures according to the floor area, and is connected to each other when installed in the excavation section 11.

A ceiling portion corresponding to the ceiling slab 2 of the inner formwork 12.
The wall 12a and the wall 12b are made of steel, a PC plate, or a resin plate, and a groove 12c (see FIG. 6) used when installing a receiving member 17, which will be described later, is formed on the upper surface or is not shown. An angle member is attached. The groove
It is advantageous to provide a plurality of 12c or angle members vertically and horizontally at a pitch that matches the module of the building to be built above.

The outer formwork 13 of the basement unit C is provided up to a position where the end in the height direction is lower than the ceiling part 12a, and of the reinforcing bar 14 reinforced along the wall part 12b of the inner formwork 12. The upper part is exposed.

Then, as shown in FIG.
After the basement unit C is installed in 11, the periphery of the unit C is backfilled to the upper end of the outer formwork 13, and the ceiling slab 2 and the foundation B are constructed on the ceiling 12a.

First, the reinforcing bar 14b corresponding to the ceiling slab 2 is connected to the ceiling part 12a of the installed basement unit C by connecting it to the reinforcing bar 14a that has been reinforced in advance, and at the same time, the basement B is to be constructed in the basement. The reinforcing bars 15 of the upper part 1a are laid out and the reinforcing bars of the general part 1b are laid out in a continuous manner with the reinforcing bars 15 and 14b. Formwork 16 for constructing the foundation B is attached to both sides of the reinforcing bar 15. At this time, the formwork 19 is connected and arranged at the upper end of the outer formwork 13 that constitutes the basement unit C.

The foundation B is attached to the reinforcing bar 14b corresponding to the ceiling slab 2.
The case of arranging the reinforcing bars 15 in the upper basement 1a of 1 will be described. As shown in FIG. 5 and FIG. 6, the ceiling B is a ceiling portion 12a of the inner formwork 12 corresponding to the ceiling slab 2 and is set in advance.
The piece-shaped brackets 17 are placed at a predetermined pitch at a position that constitutes the basement upper part 1a.

The receiving member 17 is formed by bending a plate material into a substantially M shape, and has a leg portion 17a formed in a C shape.
It is configured as a frame-shaped metal piece connected by 17b. Further, a width stop metal fitting 18 for supporting the mold 16 on the upper portion of the leg portion 17a and holding a space between the mold 16 is detachably mountable.

Therefore, the connecting piece 17c can be fitted in the groove 12c formed in the ceiling portion 12a of the inner formwork 12 or can be fixed to the member in an angle shape by bolts or the like. A bolt may be fixed to the ceiling 12a of the inner mold in advance, and the bracket 17 may be attached to this bolt. Thus, the groove 12c is formed on the ceiling 12a.
Alternatively, it is possible to improve the accuracy of the mounting position by providing an angled member and mounting the receiving member 17.

The receiving member 17 constructed as described above is used as an inner formwork.
The base 12 is arranged at a predetermined pitch on the ceiling 12a of the basement 12 according to the position of the basement upper part 1a, and a width stopper metal fitting 18 is attached and fixed to the upper part of the bracket 17. At the same time as fixing the bracket 17 to the ceiling portion 12a, the reinforcing bars 14b and 16 are laid out, and the width stopper 18
The formwork 16 constituting the basement upper part 1a of the foundation B is attached to the upper part of the. In addition, a plurality of width stoppers 18 are also provided on the upper end side of the formwork 16.
Is attached to keep the space between the molds 16 constant.

As described above, the basement units C and 16 for forming the basement A and the foundation B are installed in the excavation section 11,
Then, concrete is continuously poured between the formwork 16 and above the basement unit C. The poured concrete is evenly filled in the formwork forming the basement A and the base B, so that the base B integrated with the basement A can be constructed.

After pouring concrete into the basement units C and 16 for a predetermined curing period, as shown in FIG. 3D, the molds 16 and 19 are removed to include the periphery of the general portion 1b of the foundation B. The excavation part 11 is backfilled. As a result, the foundation B integrated with the basement A is constructed, and it becomes possible to carry out the work of building the upper building on the upper portion of the foundation B.

[0027]

As described in detail above, in the method of constructing the basement and integral foundation according to the present invention, when the reinforcement of the ceiling slab of the basement is performed, the reinforcement of the ceiling slab and the foundation of the upper building are The basement of the basement and the upper building can be constructed by constructing the formwork of the foundation and placing concrete by constructing the reinforcing bars in series. For this reason, the reinforcing work for the ceiling slab and the reinforcing work for the foundation can be performed in parallel, which simplifies the work and shortens the construction period.

Since the RC basement and the foundation of the upper building having a structure different from that of the basement are integrally formed, a discontinuous surface between the basement and the foundation does not occur, so that the strength of the foundation is improved. The weight of the building and the lateral load acting on the building can be reasonably supported.

Further, since the basement and the foundation of the upper building can be constructed integrally, the degree of freedom in designing the upper building or the basement is improved, and both can be designed at the same time. It has characteristics.

[Brief description of drawings]

FIG. 1 is a basic floor plan showing an example of a relationship between a basement and a foundation of an upper building.

FIG. 2 is a sectional view showing a part along line II-II in FIG.

FIG. 3 is a process chart schematically showing the procedure of a construction method.

FIG. 4 is a schematic perspective view showing the configuration of a basement unit.

5 is a view for explaining the formwork and bar arrangement of the basement and the foundation, and is a view showing a part of the cross section taken along the line VV of FIG. 1. FIG.

FIG. 6 is a perspective view showing the relationship between the reinforcement of the ceiling slab and the reinforcement of the foundation in the basement.

[Explanation of symbols]

A basement B basics C basement unit 1a Basement upper part 1b General section 2 ceiling slabs 11 Excavation section 12 Inner formwork 12a Ceiling 12b wall 12c groove 13 outer formwork 14a, 14b, 15 Rebar 16, 19 formwork 17 Receiving 17a leg 17b Connecting piece 18 width stopper

Claims (2)

(57) [Claims] 1. Reinforcement of a ceiling slab in a basement and installation of a rebar and a formwork forming a foundation of a building to be constructed on the upper part of the basement, and then placing concrete to form the basement and the upper part of the basement. A method of constructing a basement and an integral foundation, which is characterized by integrally constructing the foundation of the building to be constructed. 2. The basement as claimed in claim 1, wherein the ceiling slab formwork of the basement is provided with a support for supporting a formwork forming a foundation of a building to be constructed above the basement. Foundation construction method.