JP4095736B2 - Structure of gap for building discontinuity and formation method thereof - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a structure of a gap for building discontinuity and a method of forming the same, and more specifically, for substantially separating two structures that are considered to have different magnitudes of shaking, for example, in the event of an earthquake. The present invention relates to a gap structure and a method of forming the same.
[0002]
[Prior art]
When one building is subjected to vibrations such as an earthquake, each structure is different due to the difference in the basic structure that supports the structure that is long in the horizontal direction and the structure that is connected adjacently as shown in FIG. The size of body shake changes.
[0003]
Therefore, conventionally, in such a building 1, a cut or gap 2 called an expansion joint is previously made in a part of the building where different vibrations are expected to occur, and the part (structure) 1 a is replaced with another part. The part (structure) 1b was substantially separated from each other, making it difficult for vibrations to be transmitted to each other, so that the entire building was designed and constructed so as not to be cracked or damaged. Such an expansion joint 2 is generally about 10 cm, although it depends on how the building shakes.
[0004]
Conventionally, when building a building 1 having such an expansion joint 2, one building (structure) 1 a is made first, and then the other building (structure) is opened with a desired gap 2. ) 1b may be built, but since this gap 2 is too narrow for a person to enter, construction is actually difficult.
[0005]
That is, in the case of building a building with concrete, usually, as shown in FIG. 4, the formwork 3 made up of two formwork plates 3 a and 3 b is arranged and the concrete 4 is poured into the building. Formwork plates 3a and 3b were placed so that the wall of the structured body 1b had a distance L of about 10 cm from the wall of the previously constructed structure 1a, and concrete was placed therein and cured and cured. Thereafter, even if one mold 3a is to be removed, the interval 2 is too narrow to remove the mold 3a.
[0006]
Therefore, as a result, the predetermined expansion joint 2 cannot be secured, and when a shake occurs due to an earthquake or the like, adjacent structures interfere with each other or the formwork plate 3a is made of wood. It may rot and worsen the surrounding environment.
[0007]
[Problems to be solved by the invention]
For this reason, it is necessary to finally remove the formwork of the structure to be constructed later. For this reason, various methods have been conventionally used, but there is a problem that it takes too much cost and labor.
[0008]
Therefore, at present, as shown in FIG. 5, in order to make a desired gap from the wall of the structure 1a constructed previously, for example, a styrol having the same thickness as this desired gap, for example, a product name “styrofoam” 5 is used as one form plate on the wall surface of the structure to be constructed later, and this is removed while destroying after the concrete has hardened, or dissolved in volatile oil (eg gasoline). It was.
[0009]
However, even if the styrene 5 is crushed and taken out from the gap, in recent years, it is very difficult to treat such petroleum products in terms of environmental measures, and there is a danger of fire when using volatile oil. However, its adoption is becoming difficult. Further, when such styrene 5 is used, there is a concern that the following problems may occur.
[0010]
That is, as shown in FIG. 6, when forming a building with the form plates 3a and 3b, an iron spacing rod 6 called "separator" is used to hold the wall thickness T. Already well known. Such interval holding bars 6 need to be installed at a predetermined interval in order to accurately maintain the interval between the mold plates 3a and 3b against the pressure when the concrete is placed.
[0011]
Accordingly, as shown in FIG. 7 (a), the styrene 5 having the same thickness as the expansion joint 2 to be formed is placed in contact with the outer wall of the structure 1a constructed earlier, The separator 6 is arranged at a predetermined interval even when the other formwork plate 3b is arranged at a predetermined interval T from the mold plate 5 with the one form plate for building the structure 1b. The
[0012]
Even when the concrete 4 is placed and cured between the mold plates 5 and 3b and then the polystyrene 5 is removed by an appropriate means to form the expansion joint 2, the expansion joint 2 is formed as shown in FIG. Thus, one end of the separator 6 remains as it is in contact with the outer wall of the adjacent structure 1a.
[0013]
In this state, when the building 1 rolls due to an earthquake, as shown in FIG. 7C, the separator 6 is pushed by the structure 1a constructed earlier, and the wall of the structure 1b constructed later There is a very dangerous problem of penetrating through the wall and breaking through the inner wallpaper 7 and protruding into the room.
[0014]
An object of the present invention is to solve such a conventional problem. For example, when a building rolls due to an earthquake or the like, an expansion joint provided between structures considered to have different magnitudes of shaking. Provide a structure of a gap for building discontinuity that can be easily constructed without the risk of environmental problems and fires, and that does not pose a danger to the use of the building even after construction, and a method for forming the same. It is in.
[0015]
[Means for Solving the Problems]
The present invention is a structure of a gap for building discontinuity, and is configured as follows in order to solve the above technical problem. That is, the present invention is a structure of a gap for substantially separating two structures that are predicted to have different magnitudes of shaking during an earthquake when building a building,
A non-corrosive formwork that is disposed between the structures to form the gap and is left as it is after construction is provided,
The non-corrosive formwork can be used as a part of one or both formwork of two structures constructed adjacent to each other , and two form plates spaced apart from each other, and non-stress holding the spacing of these surface-plates at the time of the action, and a space holding portion having a weakened portion to narrow the gap and deform or fracture when stress action,
The gap holding portion has a protrusion having a trapezoidal cross section formed on the inner surface of each mold face plate, and the protrusion formed on the inner surface of each mold face plate faces each other and has a pointed end portion. It is configured to be connected, and the connecting portion of each pointed portion is the fragile portion .
[0017]
Furthermore, the present invention is a method for forming a gap for building discontinuity, and is configured as follows in order to solve the above technical problem. That is, the present invention provides a gap forming method for substantially separating two structures that are predicted to have different magnitudes of shaking during an earthquake when building a building.
A non-corrosive mold having two mold plates provided at a predetermined interval is provided, and the non-corrosive mold is arranged so that one mold plate touches the wall surface of the previously constructed structure,
In forming the concrete wall of the structure to be constructed later, using the other mold plate of this non-corrosive mold as a part of the mold,
When the non-corrosive mold is subjected to stress from both sides, the non-corrosive mold is provided with an interval holding part having a weakened part that deforms or breaks and narrows the distance between the two mold plates, and this interval The holding portion is formed on each of the opposing inner surfaces of each mold face plate, and has a protruding portion having a trapezoidal cross section. These protruding portions are opposed to each other and connect the pointed ends thereof, Is considered a vulnerable part,
The structure to be constructed later by placing a separator on the axis where the projection is located, forming a mold with the other mold plate as a part thereof, and placing concrete in the mold It is characterized by building concrete walls.
[0018]
In addition, the method for forming a gap for building discontinuity according to the present invention is a gap forming method for substantially separating two structures that are considered to have different magnitudes of shaking when building a building. In
A non-corrosive mold having two mold plates provided at a predetermined interval is arranged at a predetermined interval position between two structures constructed adjacent to each other, and both outer surfaces of the non-corrosive mold In forming a concrete wall in each structure using a part of a formwork when building the two structures,
When the non-corrosive mold is subjected to stress from both sides, the non-corrosive mold is provided with an interval holding part having a weakened part that deforms or breaks and narrows the distance between the two mold plates, and this interval The holding portion is formed on each of the opposing inner surfaces of each mold face plate, and has a protruding portion having a trapezoidal cross section. These protruding portions are opposed to each other and connect the pointed ends thereof, Is considered a vulnerable part,
A separator is disposed on the axis where the protrusion is located, a mold is formed as a part of the mold of the two structures, concrete is placed in the mold, and the two structures are You can also build a concrete wall of the body.
[0020]
According to the structure of the gap for building discontinuity in the present invention configured as described above, when a building formed as an expansion joint with the gap of the structure described above between two structures is shaken by an earthquake or the like, Since the magnitude of the shaking in the structure is different, the non-corrosive mold placed between the two structures is subjected to strong stress from both sides.
[0021]
When this stress exceeds a predetermined value, the apex connecting portion, that is, the fragile portion of the protrusion constituting the interval holding portion in the non-corrosive mold is deformed or broken, and the interval holding function of the mold face plate is lost. The stress propagation relationship between the two structures is broken. Therefore, vibrations of different sizes generated in both structures do not propagate from one structure to the other, and as a result, damage to the building can be effectively prevented.
[0022]
In addition, in the structure of the gap for building discontinuity according to this embodiment, the non-corrosive formwork is not removed after the building is built, but remains as it is between the structures. It does not occur and is formed of a non-corrosive material such as a synthetic resin.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the structure of the building discontinuity gap and the method of forming the same according to the present invention will be described in more detail with reference to the embodiments shown in the drawings. 1 and 2 show a structure 10 for a building discontinuity gap according to an embodiment of the present invention.
[0024]
The structure of the building discontinuity gap in this embodiment substantially separates a part of the building (structure) and another part (structure) where different vibrations are expected to occur, and transmits vibration to each other. It is about the expansion joint to make it difficult.
[0025]
When building a building in which different shaking is expected, a part of the building, that is, the structure 11 is first built according to a conventional method. And when building the other structure 12 adjacent to the wall of this structure 11, in order to form the expansion joint 10 which opened about 10 cm of gaps from the wall of the structure 11 constructed previously, A non-corrosive mold 13 having a special structure is disposed in contact with the wall of the structure 11.
[0026]
Next, this non-corrosive form 13 is used as one form plate of a form used when building another structure 12, and another form plate 14 is installed in accordance with a conventional method. A plurality of separators 15 are installed so as to hold the corrosive mold 13 and the mold plate 14 at a predetermined interval.
[0027]
At that time, as shown in FIG. 1, one end of the separator 15 penetrates the mold plate 14 and is fixed by screwing a nut 16 to the projecting end portion as shown in FIG. It can be fixed by screwing directly into a screw hole 17 formed in the wall surface of the corrosive mold 13. The concrete 4 is placed in the mold formed by the non-corrosive mold 13 and the mold plate 14 thus installed.
[0028]
After the curing of the cast concrete 4, the formwork plate 14 is removed and the structure 12 is constructed, but the non-corrosive formwork 13 is left between the structures 11 and 12. Therefore, the non-corrosive mold 13 needs to be formed to have the same thickness as the desired distance L between the structures 11 and 12 to be formed as an expand joint.
[0029]
By the way, this non-corrosive mold 13 is located between two mold face plates 13a and 13b having a predetermined interval as shown in FIGS. 1 and 2, and these two mold face plates 13a and 13b. It is comprised by the space | interval holding | maintenance part 14 provided in gap.
[0030]
The spacing member 14 is formed integrally with the inner surface of each mold face plate 13a, 13b, that is, the opposing surface, and is made up of projecting portions 14a, 14b having a triangular cross section. The projecting portions 14a, 14b are opposed to each other. The tip portion is connected to each other, and the connecting portion 14c of the tip portion is a fragile portion.
[0031]
The fragile portion 14c is deformed or broken when the non-corrosive mold 13 is subjected to stress of a predetermined value or more from the outside of the two mold face plates 13a and 13b, and the interval between the two mold face plates 13a and 13b is reduced. The thickness is designed and formed so as to function so as to maintain the space between the mold face plates 13a and 13b when stress is applied.
[0032]
Such a non-corrosive mold 13 is preferably formed of a synthetic resin product. Further, when the non-corrosive mold 13 is used as a mold for the structure 12 to be constructed later as described above, the separator 15 that holds the gap of the mold forms the gap holding portion 14. It is preferable to arrange on the axis where the projections 14a and 14b are located.
[0033]
Next, the effect | action of the clearance gap for buildings which concerns on this embodiment, ie, the expansion joint 10, is demonstrated. When a building in which the expansion joint 10 having the above-described structure is formed between the structure 11 and the structure 12 is shaken due to an earthquake or the like, the magnitudes of the shakes in the structures 11 and 12 are different. The non-corrosive mold 13 disposed between the bodies 11 and 12 receives strong stress from both sides.
[0034]
When this stress exceeds a predetermined value, the tip connecting portions of the projections 14a and 14b constituting the gap holding portion 14 in the non-corrosive mold 13, that is, the fragile portions 14c are deformed or broken, and the mold plates 13a and 13b The spacing function is lost, and therefore the stress propagation relationship between the two structures 11, 12 is broken.
[0035]
Therefore, vibrations of different magnitudes generated in both structures 11 and 12 do not propagate from one structure to the other, and as a result, it is possible to effectively prevent damage to the building. .
[0036]
Further, in the building discontinuous expansion joint 10 according to this embodiment, the non-corrosive formwork 13 is not removed after the building is constructed, but is left as it is between the structures 11 and 12. Since this is made of a non-corrosive material such as a synthetic resin, there is no problem even if left as it is.
[0037]
In the above-described embodiment, the interval holding portion 14 in the non-corrosive mold 13 has two protrusions 14a and 14b having a triangular cross-section formed on the opposing surfaces of the mold plates 13a and 13b, and the tip portions thereof. However, the present invention is not limited to the interval holding portion having such a shape, and uses various shapes based on the above-described purpose. be able to.
[0038]
Further, in the above-described embodiment of the present invention, when the building rolls due to an earthquake or the like, the explanation has been given by taking as an example the formation of the expansion joint provided between the structure regions considered to have different swing magnitudes. The present invention is not limited to such an application, and can be applied to a case where two structures are constructed with a slight gap for various reasons. That is, for example, it can be used as a construction method when a building in a separate building is built right next to an existing building.
[0039]
Further, in the above-described embodiment of the present invention, the non-corrosive mold having a special structure is used in order to form the expansion joint 10 in which the structure 11 is preliminarily constructed according to a conventional method and a gap of about 10 cm is formed from the wall. Although the frame 13 is arranged in contact with the wall of the structure 11 and the non-corrosive mold 13 is used to construct another structure 12, the present invention is not limited to this embodiment. It is not limited to.
[0040]
That is, this non-corrosive mold 13 can be arranged in advance at a predetermined position, and both surfaces of this non-corrosive mold 13 can be used as a part of the mold of two structures constructed adjacent to each other. Therefore, if it is used in this way, it is possible to perform concrete placement simultaneously when building two adjacent structures. In other words, by such a method of use, there is an effect that it is possible to eliminate restrictions on the order of prior placement of concrete when building two adjacent structures.
[0041]
【The invention's effect】
As described above, according to the present invention, for example, when a building rolls due to an earthquake or the like, the formation of an expand joint provided between structural regions that are considered to have different swing magnitudes can prevent environmental problems and fires. It is possible to provide a structure of a gap for building discontinuity and a method for forming the same, which can be easily constructed without any risk of occurrence, and can be easily used even after construction.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing a structure of an expand joint which is an embodiment of a structure of a building discontinuity gap according to an embodiment of the present invention.
2 is a perspective view partially showing a non-corrosive mold used for forming the expand joint in FIG. 1. FIG.
FIG. 3 is an explanatory diagram schematically showing a building in which an expansion joint is formed between structural body regions that are considered to have different magnitudes of shaking when the building rolls due to an earthquake or the like.
FIG. 4 shows a state in which concrete is placed by placing a conventional formwork for a structure to be constructed later, in order to form an expansion joint between two structure regions having different swings. It is a structure explanatory view shown roughly.
[Fig. 5] Fig. 5 shows a conventional styrol formwork placed between two structural areas with different swings to form an expanded joint, which is then used as part of the formwork for the structure to be built later. It is composition explanatory drawing which shows roughly the state which has poured concrete into the made mold.
FIG. 6 is a partial perspective view schematically showing an installation state of a conventional general formwork when a concrete building is constructed.
FIG. 7 shows a building constructed by disposing a styrene formwork conventionally proposed to form an expanded joint as shown in FIG. 5 and using this as a part of the formwork for a structure to be built later. It is a structure explanatory drawing which shows the problem which arises in FIG.
[Explanation of symbols]
4 Concrete 10 Structure for gap for building discontinuity 11 Structure 12 Structure 13 Non-corrosive formwork 13a Mold face plate 13b Mold face plate 14 Spacing part 14a Projection part 14b Projection part 14c Weak part (point connection part)
15 Separator 16 Nut 17 Screw hole

Claims (3)

When building a building, it is a structure of a gap for substantially separating two structures that are predicted to have different magnitudes of shaking during an earthquake ,
A non-corrosive formwork that is disposed between the structures to form the gap and is left as it is after construction is provided,
The non-corrosive formwork can be used as a part of one or both formwork of two structures constructed adjacent to each other , and two form plates spaced apart from each other, and non-stress holding the spacing of these surface-plates at the time of the action, and a space holding portion having a weakened portion to narrow the gap and deform or fracture when stress action,
The gap holding portion has a protrusion having a trapezoidal cross section formed on the inner surface of each mold face plate, and the protrusion formed on the inner surface of each mold face plate faces each other and has a pointed end portion. A structure of a gap for building discontinuity, characterized in that it is configured to be connected, and the connecting portion of each pointed portion is the fragile portion . When constructing a building, in the gap formation method for substantially separating two structures that are predicted to have different magnitudes of shaking at the time of an earthquake with a gap,
  A non-corrosive mold having two mold plates provided at a predetermined interval is provided, and the non-corrosive mold is arranged so that one mold plate touches the wall surface of the previously constructed structure,
  In forming the concrete wall of the structure to be constructed later, using the other mold plate of this non-corrosive mold as a part of the mold,
  When the non-corrosive mold is subjected to stress from both sides, the non-corrosive mold is provided with an interval holding part having a weakened part that deforms or breaks and narrows the distance between the two mold plates, and this interval The holding portion is formed on each of the opposing inner surfaces of each mold face plate, and has a protruding portion having a trapezoidal cross section. These protruding portions are opposed to each other and connect the pointed ends thereof, Is considered a vulnerable part,
  The structure to be constructed later by placing a separator on the axis where the projection is located, forming a mold with the other mold plate as a part thereof, and placing concrete in the mold A method of forming a gap for building discontinuity, characterized by constructing a concrete wall. When constructing a building, in the gap formation method for substantially separating two structures that are considered to have different magnitudes of shaking, with a gap,
  A non-corrosive mold having two mold plates provided at a predetermined interval is arranged at a predetermined interval position between two structures constructed adjacent to each other, and both outer surfaces of the non-corrosive mold In forming a concrete wall in each structure using a part of a formwork when building the two structures,
  When the non-corrosive mold is subjected to stress from both sides, the non-corrosive mold is provided with an interval holding part having a weakened part that deforms or breaks and narrows the distance between the two mold plates, and this interval The holding portion is formed on each of the opposing inner surfaces of each mold face plate, and has a protruding portion having a trapezoidal cross section. These protruding portions are opposed to each other and connect the pointed ends thereof, Is considered a vulnerable part,
  A separator is disposed on the axis where the protrusion is located, a mold is formed as a part of the mold of the two structures, concrete is placed in the mold, and the two structures are A method for forming a gap for building discontinuity, characterized by constructing a concrete wall of a body.

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