JP3245260B2 - Foundation structure and construction method - 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 a foundation having no underground structure. In more detail, the construction cost of the foundation structure of the building constructed in the
The present invention relates to an improvement relating to a construction period and a construction method suitable for constructing the foundation structure.

[0002]

2. Description of the Related Art Conventionally, as a basic structure, for example, a structure described in JP-A-2-248527 is known.

In this conventional foundation structure, an independent foundation grooving groove for constructing an independent foundation on the ground and an underground girder grooving groove for constructing an underground beam are dug, and the independent foundation grooving groove and the underground are constructed. The foundations for the independent foundations and the foundations for the underground beams, which are to be buried by inking the root trenches for beams, will be locked in the ground.
After that, crushed stone is laid and compacted in the area surrounded by the discarded formwork for the independent foundation and the underground beam, and concrete is poured on it. After the casting, the surrounding area around the discarded formwork for the independent foundation and the underground beam is backfilled with the excavated trenches for the rooting groove for the independent foundation and the underground beam, and then the discarded formwork for the independent foundation. In addition, a construction method is adopted in which concrete is continuously cast by arranging reinforcing steel inside the underground beam-removing formwork.

[0004]

In the above-mentioned conventional foundation structure, the formwork panel is fixed to the groove bottom or the like in the independent foundation root cutting groove and the underground beam root cutting groove, and the construction work is performed. And the trouble of assembling the formwork has not been eliminated.

[0005] In the conventional method for constructing a foundation, the construction of a discarded formwork for an independent foundation and a groundwork beam and the arrangement of reinforcing bars are performed by using an independent foundation cutout groove, an underground beam cutout groove and an independent cutout. Since it is performed by connecting and assembling form panels, joint members, separators, etc. inside the base form and underground beam form, and by tying the rebar with wire, it takes a lot of time to complete the construction. As a result, there is a problem that the reduction of the construction cost and the shortening of the construction period are not sufficiently achieved. In particular, since concrete is cast after crushed stones are compacted in the formwork after the formwork is assembled, the construction work is very troublesome.

The present invention has been made in view of such problems, and has a foundation structure capable of sufficiently reducing the construction cost and the construction period, and a foundation suitable for implementing the foundation structure. It is an object to provide a construction method of a structure.

[0007]

According to a first aspect of the present invention, there is provided a base structure according to the present invention. Disassembled formwork for independent foundations, externally assembled and unitized, and dismantled formwork for underground beams that are fixed to the independent foundation disposable formwork and buried in the underground girder grooving groove, assembled externally and unitized Then, a means is used which comprises reinforcing bars which are continuously dropped into each of the inside of the discarded formwork for the independent foundation and the inside of the discarded formwork for the underground beam or individually for each one.

Further, the method for constructing a foundation structure according to the present invention is a method for digging an independent foundation grooving groove for constructing an independent foundation on the ground and an underground beam grooving groove for constructing an underground beam. The unit is built and assembled externally into an open-top form that is externally assembled and unitized into an open-top form that is buried in the root trench, and externally assembled into an open-top form that is buried in the root groove for underground beams After building the discarded formwork for underground beams, connecting the discarded formwork for independent foundation and the underground beam with root cutting grooves,
The rebar assembled and assembled externally is dropped from above and arranged in the inside of the discarded formwork for independent foundation and underground beam, or individually for each side. A means is adopted in which concrete is continuously poured into both the inside of the foundation and the underground beam.

[0009]

According to the above-mentioned means, in the first aspect, since the discarded formwork for the independent foundation and the discarded formwork for the underground beam are unitized, the root-cutting groove for the independent foundation and the basement for the underground beam are provided from the ground. It is installed in the kerf. In the trench, the discarded formwork for the independent foundation and the underground beam are connected. The rebar is united and installed in the formwork from the ground.

According to a second aspect of the present invention, a disposable formwork for an independent foundation,
Since the underground beam truss form is an open-top unit, drop the independent foundation and underground beam truss into the independent foundation and underground beam trusses. Installation,
Further, the unitized rebar is also dropped into the discard form for the independent foundation and the disc for the underground beam and installed. After that, concrete is cast and constructed.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a foundation structure and a construction method according to the present invention.

First, an embodiment of the method for constructing a foundation structure according to the present invention shown in FIGS. 2 to 12 will be described.

In this embodiment, as in the prior art, first, a deep independent foundation excavation groove 1 for constructing an independent foundation in the ground and an underground beam excavation for constructing a shallow underground beam The trench 2 is trenched (see FIG. 2).

The excavated trenches for the independent foundation 1 and the underground beams 2 substantially match the shape and size of the independent foundation and the underground beam to be constructed. That is, as shown in FIG. 5, the distance S between the side wall of the independent foundation root cutting groove 1 and the independent foundation discarded formwork 3 is reduced (not shown in the drawing, but the underground beam root cutting groove 2 is not shown). The same applies to the distance between the side wall of the underground beam and the shaping frame 4 for underground beams.) Therefore, the amount of extra digging of the root grooving for the independent foundation 1 and the root grooving 2 for the underground beam is reduced.

Subsequently, crushed stone 5 is laid on the entire bottom of the root excavation groove 1 for independent foundation, rolled, and concrete is discarded thereon.
(See FIG. 3). At this time, such crushed stone 5 and concrete 6 are not applied to the bottom of the underground beam root cutting groove 2.

Thereafter, the upper opening and the lower opening, which are pre-assembled and unitized outside the independent foundation root cutting groove 1, are not formed without ink marking (simple centering or the like may be performed). The discarded formwork 3 for an independent foundation is hung by a crane or the like (see FIG. 4), dropped from above the root cutting groove 1 for an independent foundation, and installed on the discarded concrete 6 (FIG. 5).
reference).

Further, an open-ended, bottomed underground beam disposable form frame 4 assembled and unitized outside the underground beam root cutting groove 2 is suspended by a crane or the like (see FIG. 6). It is dropped from above the kerf 2 and installed on the bottom (see FIG. 7).

After the installation of the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam is completed, the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam are welded or, if necessary, And fix the connection by bolting. By this connection and fixing, the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam are integrated, and the installation is completed.

In connection and fixing between the discarded form frame 3 for the independent foundation and the discarded form frame 4 for the underground beam, a connection window portion in which the discarded form frame 3 for the independent foundation and the discarded form frame 4 for the underground beam can be fitted. 3 'is provided on the discarded formwork 3 for the independent foundation, and the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam are firmly integrated.

In the installation of such a form 3 for an independent foundation and a form 4 for an underground beam, it is troublesome and complicated work inside the root cutting grooves 1 and 2 for the independent foundation. Is not accompanied, no problem occurs even if the interval S is short. Also,
The underground beam truss form 4 is formed in a bottomed shape with a bottom plate 4 ′, and there is no problem even if the ground is not constructed with the crushed stone 5 and the crushed concrete 6 in the underground beam root cutting groove 2. . In addition, since the installation method is a recessed installation method, it is possible to reliably perform the work even if there are obstacles or the like in the surrounding area.

Immediately after the disposing of the foundation frame for the independent foundation 3 and the disposal frame for the underground beam 4, the surroundings of the disposal foundation frame for the independent foundation 3 and the disposing form frame 4 for the underground beam are separated. The kerfs 1 and the underground beam root kerfs 2 are backfilled with excavated soil 7 (see FIG. 8).

This backfilling prevents the open state of the independent foundation root cutting groove 1 and the underground beam root cutting groove 2 from being used unnecessarily, thereby preventing the worker from falling down and the like. Contribute to improvement. In addition, the side walls of the root cut groove 1 for the independent foundation, the root groove 2 for the underground beam, and the side walls of the discarded formwork 3 for the independent foundation 3 and the discarded formwork 4 for the underground beam are pressed by the earth shaving 7 to form the independent foundation cutout. This contributes to stabilization of the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam inside the root cutting groove 1 and the underground beam root cutting groove 2.

After backfilling around the discarded formwork 3 for the independent foundation, the discarded formwork 3 for the underground beam, A grid-frame-shaped reinforcing bar 8 assembled and unitized so as to be continuous with both the inside of the discarding mold frame 3 and the underground beam discarding frame 4 is hung by a crane or the like (see FIG. 9), and is dismantled for an independent foundation. Reinforcement is dropped from above the formwork 3 and the underground beam discarding form 4 and arranged inside the independent foundation discarding formwork 3 and the underground beam discarding form 4 (see FIG. 10).

In the arrangement of the reinforcing bars 8 as described above, there is no trouble or troublesome work inside the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam, and there are obstacles and the like around. Even if it does, it can be done reliably. In addition, as shown in FIG. 12, when a jack 11 is mounted on a portal-shaped stand 10 which is installed so as to straddle the upper edge of the underground beam discarding frame 4 and the reinforcing bars 8 are suspended, work is performed. Be easy and accurate.

After the reinforcing bars 8 are arranged, the concrete 9 is continuously introduced into the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam.
(See FIG. 11).

FIG. 13 shows an example of an efficient construction in the entire construction area G by the above-described construction method of the foundation structure according to the present invention.

In this construction example, a plurality of construction areas G (4
Are divided into sections A, B, C,..., And first, an independent foundation root cutting groove 1 and an underground beam root cutting groove 2 are dug in the ground of one section A. Then, the discarded formwork 3 for the independent foundation and the discarded formwork 4 for the underground beam are erected in the root cutout groove 1 for the independent foundation and the cutout groove 2 for the underground beam. At this time, the excavated soil 7 formed by digging the root excavation groove 1 for the independent foundation and the root excavation groove 2 for the underground beam is carried out of the site.

Subsequently, similarly, in another section B, the trenches for the independent foundation root cutting groove 1, the underground beam root cutting groove 2, the trenches for the independent foundation, the disposable formwork for the independent foundation 3, and the disposable formwork 4 for the underground beam are installed. Then, the excavation 7 at the time of the trench of the independent foundation root cutting groove 1 and the underground beam root cutting groove 2 is removed around the independent foundation disposing frame 3 and the underground beam disposing frame 4 of the section A. Process in the hall.

Thereafter, the root grooves 1 for such independent foundations are used.
The trenches of the underground girder ditches 2, the foundations for the independent foundations 3, the construction of the foundations for the underground beams 4, and the backfilling of the excavated soil 7 were performed for each section A
B, C, etc. are carried out one after another, and the remaining area of the last remaining section of the construction area G is around the discarded formwork 3 for the independent foundation 3 and the discarded formwork 4 for the underground beam. To process.

According to such a construction example, since the root-cutting groove 1 for the independent foundation and the root-cutting groove 2 for the underground beam are opened one by one in the construction area G and are successively processed in the yard by the shaving 7, the independent foundation Since the open state of the root grooving 1 and the underground girder 2 can be shortened, there is a danger of the worker falling into the root grooving for the independent foundation 1 and the grooving groove 2 for the underground beam. And the safety of construction increases. In addition, the open state of the independent foundation root cutting groove 1 and the underground beam root cutting groove 2 is shortened, so that there is no need to install a work scaffold for preventing falling or the like. By effectively using the earth shaving 7 to shorten the state in which the underground beam root cutting groove 2 is opened, the construction cost is further reduced and the construction period is shortened. In addition, since there is no traffic of the vehicle for carrying out and carrying in the excavated soil 7 and the like, it is possible to contribute to alleviation of traffic volume and reduction of environmental pollution.

As described above, in addition to the illustrated embodiment of the method for constructing a foundation structure according to the present invention, in the case of a small scale, the disposable formwork 3 for the independent foundation and the disposable formwork 4 for the underground beam are used for the independent foundation. Root cutting groove 1,
It is also possible to adopt an embodiment in which after being connected and fixed outside the underground beam root cutting groove 2, it is built inside the independent foundation root cutting groove 1 and the underground beam root cutting groove 2.

Further, it is also possible to adopt an embodiment in which the reinforcing steel bar 8 is formed into a lattice frame which is individually assembled and unitized with one of the insides of the discarded form frame 3 for the independent foundation and the discarded form frame 4 for the underground beam.

Next, based on the embodiment of the foundation structure according to the present invention shown in FIG. 1 and FIG. 13, the features of the foundation structure constructed by the above-described construction method of the foundation structure according to the invention will be described.

As shown, the discard frame 3 for an independent foundation can be formed of a steel material into a square frame shape. The side portion 12 is formed of a panel material, and is desirably a thin material having corrugations. For example, a keystone deck (trade name) is used. Further, an L-shaped reinforcing rib is used for the corner portion 12, and a panel is welded or bolted to this rib to be integrated. An upper frame 13 and a lower frame 14 each having an L-shape are integrally formed on the upper and lower sides. In addition, it is desirable that the underground beam discarding frame 4 is integrally formed from a similar material.

The basic structure M of this embodiment has an independent foundation and a concrete 9 with no underground beam as in the prior art.
In addition, since the separator is not penetrated, corrosion from the seam or the separator does not occur. And this concrete 9
In addition, the reinforcement 8, the bottom part, and the side part of the inside are integrated with the discarded frame 3 for the independent foundation and the discarded frame 4 for the underground beam, thereby strengthening the foundation structure M.

Further, in the foundation structure M of this embodiment, since the discarded form frame 3 for the independent foundation, the discarded form frame 4 for the underground beam, and the reinforcing bar 8 are unitized, the root cutting groove 1 for the independent foundation, Underground girder root digging groove 2, independent foundation disposable formwork 3, underground girder disposable formwork 4
Since it is no longer necessary to perform troublesome work inside the work, it is possible to sufficiently reduce the construction cost and the construction period.

As described above, in addition to the illustrated embodiment of the foundation structure according to the present invention, in the soil surrounded by the discarded form frame 3 for the independent foundation and the discarded form frame 4 for the underground beam, the discarded form frame 3 for the independent foundation can be used. Although not shown in the drawing and the underground girder form 4, an embodiment in which a steel-soil panel is integrated, concrete 9 is continuously cast, and an independent foundation, an underground beam, and a soil are integrated. It is also possible.

[0038]

As described above, the basic structure according to the present invention has the following features.
Inside of the foundation, the underground beam, the underground beam, the underground beam, the underground beam, the underground beam, the underground beam, the underground beam, and the inside of the underground beam It is no longer necessary to carry out labor-intensive work, reducing construction costs.
There is an effect that the shortening of the construction period can be sufficiently achieved.

Further, the method for constructing a foundation structure according to the present invention is characterized in that the discarded formwork for the independent foundation and the underground beam are formed in an open-top unit, and the root cutout groove for the independent foundation and the underground beam cutout groove are provided. Can be dropped into the discarded formwork for independent foundation and underground beam and installed, and the unitized rebar can also be dropped into the discarded formwork for independent foundation and underground beam and installed. Since it is possible, it is extremely effective for construction inside a limited space, such as a root cutting groove for an independent foundation, and has an effect that is suitable for constructing the aforementioned foundation structure.

Furthermore, since the method of constructing a foundation structure according to the present invention employs a drop-down installation method from above, there is an effect that construction can be performed reliably even if there are obstacles or the like in the surroundings.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a basic structure according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a method for constructing a foundation structure according to the present invention, showing an initial step.

FIG. 3 is a sectional view showing a step following the step shown in FIG. 2;

FIG. 4 is a sectional view showing a step following FIG. 3;

FIG. 5 is a sectional view showing a step following FIG. 4;

FIG. 6 is a sectional view showing a step following FIG. 5;

FIG. 7 is a sectional view showing a step following FIG. 6;

FIG. 8 is a sectional view showing a step following the step shown in FIG. 7;

FIG. 9 is a sectional view showing a step following FIG. 8;

FIG. 10 is a sectional view showing a step following FIG. 9;

FIG. 11 is a sectional view showing a step following FIG. 10;

FIG. 12 is an enlarged perspective view showing the step of FIG. 6;

FIG. 13 is a cutaway perspective view for explaining a discarded formwork for an independent foundation according to the present invention.

FIG. 14 is a plan view showing a construction example of the entire construction area in the embodiment of the method for constructing a foundation structure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Root cut groove for independent foundation 2 Root cut groove for underground beam 3 Discarded formwork for independent foundation 4 Discarded formwork for underground beam 7 Shaving 8 Reinforcement 9 Concrete

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 27/00-27/01

Claims (2)

(57) [Claims] An independent assembling unit which is externally assembled and unitized and buried in an independent foundation root cutting groove, and an underground beam root which is externally assembled and unitized and fixed to the independent foundation dismounting frame. A buried formwork for underground beams buried in kerfs,
A foundation structure composed of rebars that are assembled outside and unitized, and that are continuously dropped into each of the insides of the discarded formwork for independent foundation and the underground beam, or individually for each side. 2. An open-top type in which an independent foundation grooving for constructing an independent foundation on the ground and an underground girder grooving for constructing an underground beam are buried in the independent foundation grooving. At the same time, a unitized underground formwork for independent foundation is assembled and unitized, and a unitized underground beam formwork is assembled and externally assembled into an open top that will be buried in the underground beam root trench. After connecting the discarded formwork for independent foundation and the underground beam with root cutting grooves, it is continuously connected to both the inside of the discarded formwork for independent foundation and the underground beam. Alternatively, individually reinforce the steel bars assembled and unitized externally from the outside, drop them from above, arrange them, and then concrete both continuously inside the discarded formwork for independent foundation and underground beam. A method for constructing a foundation structure, characterized by casting.