JP2014163170A - Wall structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wall structure in which a translucent synthetic resin plate constituting a wall is not easily burned through by flame and heat due to a vehicle fire accident or the like.SOLUTION: In the wall structure provided with a plurality of pillars 2 and translucent synthetic resin plates 3 mounted between the pillars, heat shielding members 4 having a number of openings are arranged along single-sided surfaces of the synthetic resin plates 3 whose surfaces become heated sides. When a fire occurs due to vehicle collision or the like, flame and heat are blocked by non-opening regions of the heat shielding members 4, transmission of flame and heat is decreased, and heating of the synthetic resin plates 3 is suppressed. As a result, the synthetic resin plates 3 are hardly burned through.

Description

  The present invention relates to a wall structure improved so that a translucent synthetic resin plate constituting a wall does not easily burn out in a fire.

  Conventionally, as a sound insulation board for highways or railways, it contains 80 to 96% by weight of methacrylic resin and 4 to 20% by weight of organic flame retardant, and flame retardancy, in particular, fire spread while maintaining the original transparency of methacrylic resin. A flame retardant transparent sound insulation board capable of exhibiting a prevention effect is known (Patent Document 1).

  Further, in a road soundproof wall structure in which a plurality of columns and a light-transmitting plate are attached between the columns, a lower mesh is made fine at a position opposite to the sound source side of the light-transmitting plate, and an intermediate portion Or, by placing a metal mesh body with a rough upper mesh, when the translucent plate spreads in a fire due to a vehicle collision accident, the synthetic resin that has burned and melted is scattered and dropped into the general residential area. There is also known a soundproof wall structure that can prevent a secondary disaster from occurring (Patent Document 2).

Japanese Patent Laid-Open No. 8-311822 JP 2004-250975 A

  The flame-retardant transparent sound insulation board described in Patent Document 1 prevents the spread of fire by an organic flame retardant, and the soundproof wall structure described in Patent Document 2 is opposite to the sound source side of the light-transmitting board. The metal net placed at the side position prevents the molten resin of the translucent plate that has spread due to vehicle fires, etc. from scattering and falling into the general living area, both of which are caused by vehicle fires, etc. It is not intended to block heat and prevent the sound insulation board and the light transmission board from burning out.

  The present invention has been made under the above circumstances, and the problem to be solved is a wall structure in which a light-transmitting synthetic resin plate constituting the wall does not easily burn out due to flame or heat caused by a vehicle fire or the like. Is to provide.

  In order to solve the above-described problems, a wall structure according to the present invention is a wall structure including a plurality of columns and a light-transmitting synthetic resin plate attached between the columns, and the synthetic resin plate is heated. A heat-shielding member having a large number of openings is arranged along one side which is the side to be connected.

In the wall structure of the present invention, the opening ratio of the heat shielding member is preferably 44% or more and 92% or less. And it is preferable that the said member for heat insulation is a member made from stainless steel or a zinc covering iron, and it is preferable that it is a net | network body or a grid | lattice body.
Such a wall structure of the present invention is preferably used as a soundproof wall.

  Like the wall structure according to the present invention, when a heat shielding member having a large number of openings is arranged along one surface on the side to be heated of the synthetic resin plate, when a fire occurs due to a vehicle collision accident or the like Since the flame and heat are blocked by the non-opening portion of the heat shielding member, the flame and heat permeation are reduced and the heating of the synthetic resin plate is suppressed, so that it is difficult for the synthetic resin plate to burn out.

  In particular, when the opening ratio of the heat-shielding member is 92% or less, sufficient burn-out prevention performance is demonstrated and the opening ratio is 44% or more, as supported by the data of Examples described later. Good translucency and transparency are ensured.

  In addition, if the heat shielding member is made of stainless steel or zinc-coated iron, these have a high melting point and are difficult to melt or fall off due to heat in the event of a fire. Omission can be suppressed. The heat shielding member may have any shape as long as it has a large number of openings, and among them, a member having a planar shape such as the above-described net or lattice is preferably used.

  Although the wall structure of the present invention is used for various applications, the synthetic resin plate mounted between the columns is a translucent resin plate, and is used for heat shielding arranged along one side which is the heated side. Since the member is a see-through member having a large number of openings, it is particularly preferably used as a soundproof wall that does not block the view of roads and tracks.

It is a front view which shows the wall structure which concerns on one Embodiment of this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. FIG. 4 is an enlarged view of a portion surrounded by a circle in FIG. 3. It is explanatory drawing of the heat insulation effect verification test of the member for heat insulation. It is a graph which shows the relationship between the opening area (mesh area) of the member for thermal insulation in the thermal-insulation effect verification test, and the temperature of a thermocouple. It is a graph which shows the relationship between the aperture ratio of the member for thermal insulation in the thermal insulation effect verification test, and the temperature of a thermocouple.

  Hereinafter, embodiments of the wall structure according to the present invention will be described in detail with reference to the drawings.

  1 is a front view showing a wall structure according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. It is an enlarged view of the part enclosed with the circle.

  As shown in FIGS. 1 to 3, the wall structure of this embodiment is constructed on the shoulder of the highway 1 as a soundproof wall for roads, and includes a support column 2 and a translucent synthetic resin plate 3. And a heat shielding member 4 and an upper frame member 5.

  A plurality of support columns 2 are embedded in a side wall portion 1a whose lower end rises from the shoulder of the highway 1, and a plurality of columns 2 are set up at predetermined intervals in the length direction of the side wall portion 1a. This support | pillar 2 consists of H steel materials as shown in FIG. 3, FIG. 4, and long H steel materials of about 1-3 m are used so that the high soundproof wall excellent in the soundproof effect may be constructed | assembled. . Although the mutual space | interval of the support | pillar 2 is not restrict | limited in particular, when the synthetic resin board 3 is a polycarbonate resin board, it is preferable to set to the space | interval of about 1-4 m in consideration of the magnitude | size (width), In the case of an acrylic resin plate, it is preferable to narrow the interval a little.

  The support column 2 is not limited to the above-described H steel material, and a metal square pipe, a round pipe, a square bar, a round bar, or the like may of course be used, but when an H steel material is used as in this embodiment, As shown in FIG. 4, the side end portions of the synthetic resin plates 3 and 3 and the side end portions of the heat shielding members 4 and 4 are inserted into the recesses on both sides of the support column 2 made of H steel, so that they can be fitted and fixed with good fit. This is preferable because of its advantages.

The translucent synthetic resin plate 3 is disposed between the columns 2 as shown in FIGS. 1 and 3, and the heat shielding member 4 is formed of the synthetic resin plate 3 as shown in FIGS. 1 to 3. It is arranged along one side which becomes the road side, that is, one side which becomes the side to be heated when a fire due to a vehicle accident or the like occurs on the road 1. As shown in FIGS. 2 to 4, the synthetic resin plate 3 and the heat shielding member 4 are preliminarily formed into a composite panel by integrally surrounding and fixing them with a frame member 6 having a U-shaped cross section. As shown in FIG. 3, both ends of the synthetic resin plate 3 and the heat shielding member 4 formed into a composite panel are inserted into the recesses of the pillars 2 and 2 made of H steel on both sides, As shown in FIG. 4, the packing material 11 packed in the gap between the column 2 and the frame member 6 is attached to the column 2 without rattling.
The side edges of the synthetic resin plate 3 and the heat shielding member 4 are inserted into the recesses of the column 2 made of H steel without surrounding and fixing the four sides of the synthetic resin plate 3 and the heat shielding member 4 with the frame material 6. The bolts and nuts may be fastened together and fixed to the support column 2. However, as described above, the frame member 6 surrounds and fixes the synthetic resin plate 3 and the heat shielding member 4 around the circumference so as to form a composite panel in advance. In the case of mounting on the support column 2, there is an advantage that the workability on the site is greatly improved, and when it is made into a composite panel, as will be described later, on one side which is the heated side of the synthetic resin plate 3, This is preferable because there is an advantage that the working member 4 is brought into contact with each other or a small interval of 10 mm or less is provided to facilitate the proper arrangement.

  As the synthetic resin plate 3, various thermoplastic resin plates having translucency can be used. Among them, a polycarbonate resin plate, an acrylic resin plate and the like excellent in transparency and weather resistance are preferably used. The dimensions of the synthetic resin plate 3 are not particularly limited, but considering the moldability, transportability, strength, soundproofing, etc., the synthetic resin plate having a length of about 1 to 4 m, a width of about 1 to 4 m, and a thickness of about 5 to 15 mm. Are preferably used.

  The heat shielding member 4 is a metal member having a large number of openings. In this embodiment, a net body having a square mesh (opening) made of stainless steel vertical and horizontal lines is used. . The heat shielding member 4 may be disposed with a gap along one side to be heated of the synthetic resin plate 3, but the side to be heated of the synthetic resin plate 3 without opening a gap. It is preferable to arrange | position in the state which contacted the one side which becomes, or to arrange | position with the small clearance gap of 10 mm or less. If there is a gap larger than 10 mm between the heat insulation member 4 and the synthetic resin plate 3, the heat insulation member 4 is likely to be damaged when the vehicle collides with the soundproof wall. Then, while it becomes difficult to suppress the burnout of the synthetic resin plate 3 by the heat shielding member 4, the heat shielding member 4 is disposed in contact with one surface of the synthetic resin plate 3 without a gap, or 10 mm. When the vehicle is placed with a small gap as shown below, even if the vehicle collides with the soundproof wall, the heat insulating member 4 will not be damaged unless the synthetic resin plate 3 is damaged. This is because sometimes the flame or heat is blocked by the non-opening portion of the heat shielding member 4 and the burnout of the synthetic resin plate 3 can be reliably suppressed.

  The opening ratio of the heat shielding member 4 is preferably 44% or more and 92% or less. If the aperture ratio is 92% or less, the heat shielding member 4 reduces the transmission of flames and heat, and the heating of the synthetic resin plate 3 is suppressed and sufficient burnout prevention is supported by test data described later. Performance is demonstrated. When the aperture ratio is 44% or more, the translucency and transparency required for the soundproof wall of the road are ensured.

  The openings of the heat shielding member 4 may be any shape such as a circle, a triangle, a quadrangle, a hexagon, a rhombus, etc., but the openings need to be uniformly distributed throughout the heat shielding member 4. A heat-shielding member in which the openings are partially unevenly distributed is not suitable because it cannot exhibit a uniform heating suppression effect.

The heat shielding member 4 has heat resistance that does not melt even when exposed to a flame, has higher thermal conductivity than the synthetic resin plate 3, and has durability that can withstand long-term use outdoors. In order to satisfy these requirements, a heat shielding member made of stainless steel or zinc-coated iron is preferably used. In particular, a planar body such as a net or a lattice that can be easily disposed along one surface of the synthetic resin plate 3 is used. Those having various shapes are preferably used.
Punching metal and expanded metal can also be used.

  The upper frame member 5 is a metal mold having an inverted U-shaped cross section, and is covered with the synthetic resin plate 3 which is surrounded and covered with the frame member 6 to form a composite panel and the upper edge of the heat shield member 4. It is fixed to the upper end of the column 2 with a stopper (not shown). In the wall structure of this embodiment, only the upper edge of the synthetic resin plate 3 and the heat shielding member 4 formed into a composite panel is surrounded by the upper frame material 5, but the lower ends of the synthetic resin plate 3 and the heat shielding member 4. The edge may be surrounded by a lower frame material (not shown) made of the same metal mold material. In some cases, the intermediate frame is bridged between the columns 2 and 2 and the synthetic resin plate 3 divided into the upper and lower sides is shielded. You may make it attach the member 4 for heat. The upper frame material 5 may be omitted.

  If the wall structure as described above is constructed as a soundproof wall on the side wall 1a of the shoulder of the road 1, when a fire occurs on the road 1 due to a vehicle collision accident, the synthetic resin plate 3 is heated. Since the flame and heat are blocked by the non-opening portion of the heat shielding member 4 arranged along the one side, the transmission of the flame and heat is reduced and the heating of the synthetic resin plate 3 is suppressed. This makes it difficult to burn out. In addition, the noise caused by the vehicle is somewhat absorbed by the heat shielding member 4 having a large number of openings, and is reflected to the road side by the synthetic resin plate 3, thus preventing noise damage to the residential area along the road. Is done.

  Next, a test conducted for verifying the heat shielding effect (heat transmission suppressing effect) by the heat shielding member 4 will be described.

As shown in FIG. 5, support blocks 8 and 8 are arranged on both sides of the cassette stove 7, and six types of stainless steel (SUS304) wire meshes 4A, 4B, 4C, 4D, shown in Table 1 below are used as the heat shielding member 4. 4E and 4F and the zinc-coated steel wire mesh 4G are placed between the support blocks 8 and 8 one after another from the cassette stove 7 at a distance of 40 cm and a metal plate 10 with a thermocouple 9 sandwiched between them. Was heated by the cassette cooker 7 and the temperature of the thermocouple 9 was measured when the temperature was stabilized after about 10 seconds. The results are shown in Table 1 below. A graph showing the relationship between the opening area of the heat shielding member 4 and the temperature of the thermocouple 9 is shown in FIG. 6, and a graph showing the relationship between the opening ratio of the heat shielding member 4 and the temperature of the thermocouple 9 is shown in FIG. To each.
Both the stainless steel wire mesh and the zinc-coated iron wire mesh used have a square mesh made of vertical and horizontal wires having a wire diameter of 1.0 mm.
Further, the temperature of the thermocouple 9 when the heat shielding member 4 was omitted was also measured and shown in Table 1 below.

From Table 1, FIG. 6, and FIG. 7, the measured temperature of the thermocouple 9 is 920 when using a stainless steel mesh 4F with an opening area (mesh area) of 900 mm ² and an aperture ratio of 94% as the heat shielding member 4. It can be seen that the temperature is the same as the measured temperature of the thermocouple 9 when the heat shielding member 4 is omitted, and the heat shielding effect (heat transmission suppressing effect) cannot be achieved.
In contrast, as the heat member 4 shielding the opening area (mesh area) 4～600Mm ^2, stainless wire mesh 4A~4E and a aperture ratio from 44 to 92 percent, open area (mesh area) 100 mm ^2, the opening The measurement temperature of the thermocouple 9 when the zinc-coated steel wire mesh 4G having a rate of 83% is used is in the range of 300 to 860 ° C., and the measurement of the thermocouple 9 when the heat shield member 4 is omitted. It can be seen that the temperature is lower than 920 ° C., and the measurement temperature of the thermocouple 9 decreases as the opening area and the opening ratio become smaller, and a good heat shielding effect (heat transmission suppressing effect) can be achieved.

  Next, the flame resistance test (burn-out prevention effect confirmation test) of the wall structure of the present invention will be described.

  As shown in Table 2 below, along with one side of the transparent polycarbonate plate (1 m × 1 m × 12 mm) to be heated (fire side), the stainless steel meshes 4A, 4B, 4E, 4F, Were placed in contact with each other, and four circumferences thereof were surrounded by a frame made of H steel to produce five types of test walls (composite panels). Moreover, as shown in Table 2 below, the stainless steel wire mesh 4B is disposed along one side of the polycarbonate plate that is not heated (back side), and the test wall body that is surrounded by a frame around the four sides, and the stainless steel The metal mesh 4B is placed in the center by sandwiching it between two polycarbonate plates having a thickness of 6 mm, and the test wall body is surrounded by a frame body around the four circumferences, and the four circumferences of the polycarbonate plate are surrounded by the frame body by omitting the wire mesh. A test wall was also made.

  In accordance with NEXCO Test Method, Volume 9, Environmental Test Method (H21.7) 904-2009, Sound Insulation Wall Flame Resistance Test Method (Burner Method), from the front where the wire mesh of each test wall is placed At intervals of 40 cm, the flame was irradiated with a gas burner (caliber 100 mm, gas pressure 0.075 MPa), 1 minute passed, 1 minute 30 seconds later, 2 minutes passed, and through holes due to burnout of the polycarbonate plate Examine the presence or absence, and further extend the flame irradiation time. After 3 minutes, 4 minutes, 5 minutes, the presence or absence of through-holes and the generation of through-holes from the end of flame irradiation until self-extinguishing The presence or absence of was investigated. The results are shown in Table 2 below.

From Table 2, as in the wall structure of the present invention, the stainless steel meshes 4A, 4B, 4A, 4B, 4A, 4B, 4A, 4B, 4A, 4B, 4A, 4B The test wall with 4E and zinc-coated steel wire mesh 4G shows no through-holes due to burnout in the polycarbonate plate, even during the 5-minute burner irradiation and during the period after the burner irradiation ends. It can be seen that there is a sufficient burn-out preventing effect.
On the other hand, a test wall body in which a wire mesh is omitted, a test wall body in which a stainless steel mesh 4F having an opening ratio of 94% which is too large is arranged on the fire side of a polycarbonate plate, and an appropriate stainless steel having an opening ratio of 83%. The test wall with the metal mesh 4B placed on the back side of the polycarbonate plate (the side opposite the fire source side) does not show any through-holes due to burnout during the 5-minute burner irradiation. Through-holes were observed before the gas was extinguished, and the test wall in which an appropriate stainless steel mesh 4B with an aperture ratio of 83% was placed in the center of the polycarbonate plate was burned out by 5 minutes of burner irradiation. It can be seen that the effect of preventing the burning-out of all through holes is insufficient.
From the above, in order to obtain a wall structure with satisfactory burn-out prevention performance, the metal heat shielding member 4 such as a stainless steel wire mesh or a zinc-coated steel wire mesh having an opening ratio in the range of 44 to 92% is used. It is proved that it is necessary to arrange the synthetic resin plate 3 such as a transparent polycarbonate plate along one side on the heated side.

DESCRIPTION OF SYMBOLS 1 Road 1a Side wall part rising from the road shoulder 2 Support | pillar 3 Transparent synthetic resin board 4 Metal heat-insulating member 5 Upper frame

Claims (5)

  In a wall structure including a plurality of support columns and a translucent synthetic resin plate attached between the support columns, a shield having a large number of openings is provided along one side of the synthetic resin plate to be heated. A wall structure in which a thermal member is disposed.   The wall structure according to claim 1, wherein an opening ratio of the heat shielding member is 44% or more and 92% or less.   The wall structure according to claim 1, wherein the heat shielding member is a member made of stainless steel or zinc-coated iron.   The wall structure according to any one of claims 1 to 3, wherein the heat shielding member is a net or a lattice.   5. The wall structure according to claim 1, wherein the wall structure is used as a soundproof wall.

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