JP5734147B2 - Wall structure - Google Patents

Description

  The present invention relates to a wall structure for constructing a wall having a sound insulation effect.

  In order to suppress the propagation of noise when the vehicle travels to the outside, a noise barrier is provided along the railway or road. In recent years, along with the overcrowding of cities, houses along railroads and roads are becoming higher-rise, and higher noise barriers are required to shield the above noise.

  Since the conventional concrete soundproof wall is heavy and has a heavy load on a frame such as a viaduct, there is a restriction on the height of the soundproof wall that can be installed. For example, there are various problems in concrete soundproof walls such as aging of concrete, cold joint, neutralization, and deterioration due to alkali aggregate reaction. When the concrete deteriorates, there is a risk that the concrete piece may fall off or fall off.

  Therefore, a soundproof wall (for example, see Patent Document 1) using a fiber reinforced plastic (FRP) which is a lightweight material is being used instead of a concrete soundproof wall. The FRP soundproof wall can shorten the construction period and is advantageous from the viewpoint of workability as compared with the concrete soundproof wall made in the field.

  The sound barrier made of FRP is called a self-supporting type and can be produced in a factory. As a method of constructing such an FRP soundproof wall, for example, a construction method that is installed after completion of a frame such as a viaduct or a construction method that is installed after removing an existing block wall or concrete wall is known.

  In the case of a self-supporting soundproof wall, it is necessary to transmit the bending moment due to the wind load to the housing through a mounting portion integrally formed with the soundproof wall. Therefore, a large stress acts on the attachment portion for attaching the soundproof wall to the housing.

  Generally, it is required to install a soundproof wall within the width of a predetermined installation area, and there is a limit to the width of the mounting portion that can be installed. For example, in the case of a railway viaduct, the area where the soundproof wall can be installed is 150 mm to 250 mm, respectively, except for the vehicle running area and the signal burying area, and in the case of an existing viaduct, 150 mm to 200 mm. In the case of a newly built viaduct, it is limited to 250 mm or less due to the construction limit of the frame.

Similarly, even the FRP soundproof wall of Patent Document 1 needs to be installed in the above-mentioned installation area, and in order to cope with a wind load of 3 kN per unit area (1 m ² ), there are various contrivances regarding the form of the mounting portion. Has been made.

  Patent Document 1 discloses a configuration in which a foam plastic is included in an FRP cylinder extending over the entire width of the FRP soundproof wall, and a mounting portion is integrally formed with a reinforcing member made of the FRP cylinder. Yes.

  In Patent Document 2, there is a solid member made of FRP that extends part of the mounting portion of the FRP soundproof wall or the entire width of the soundproof wall and extends to the lower part of the soundproof panel portion. The structure provided with the attaching part integrally formed with the reinforcement member which consists of a solid member is disclosed.

  In these FRP soundproof walls described in Patent Documents 1 and 2, the soundproof panel portion extending in the height direction and the mounting portion extending in the horizontal direction are L-shaped in cross-sectional shape and are called reinforcing ribs. Connected by stiffeners. The wind load (wind pressure) is caused by, for example, wind generated by the passage of the vehicle or the weather. The wind load received by the soundproof panel (including the vertical surface of the L-shaped stiffener) is transmitted through the stiffener and acts on the lower mounting portion.

  Further, there is known a wall structure configured such that, when viewed from the height direction, at least a part of the attachment portion is accommodated in a structure higher than the attachment portion (for example, Patent Document 3). reference). In such a configuration, the neutral surface of the wall structure when receiving a bending moment around a predetermined axis extending in the width direction is stored in a structure on the side higher than the mounting portion or in the vicinity thereof. It can be positioned. Therefore, the bending stress acting on the bottom plate of the wall structure and its attaching means (attachment portion) and the load applied to the housing are reduced.

  The wall structure described in Patent Document 3 devised by the present applicant is lighter than the conventional structure and has a flat noise source side (vehicle side) surface, so that the soundproofing performance is improved. Further, since the vehicle-side surface is flat, the visibility of the sign is improved without hindering the driver's visual field. Therefore, the wall structure described in Patent Document 3 is suitable as a wall structure when a wall is constructed along a railroad or a road.

  The wall structure of Patent Document 3 includes a second plate constituting the back wall, a bottom plate constituting the bottom, a plurality of inner ribs provided inside the wall structure, and the like. The mounting portion is formed as an integral structure using the second plate, the bottom plate, and a portion of a pair of inner ribs that face each other and are adjacent to each other. Thereby, the attachment part of a firm structure is realizable. In addition, in this integrally mounted portion, it is possible to withstand a greater load than in the past by eliminating the discontinuous joints. Furthermore, by increasing the thickness of the inner rib of the attachment portion as necessary, the strength of the attachment portion can be easily increased while avoiding a significant weight increase of the wall structure. Therefore, the wall structure long in the height direction can be realized.

  In addition, there is a technique described in Patent Document 4 as a wall structure made of FRP which is provided with a fixed portion at the lower end and is installed upright. In the wall structure of Patent Document 4, an opening plate having a plurality of openings is provided at the upper end as a portion that exhibits a function different from that of the main body portion.

  Moreover, as shown in FIG. 2 of patent document 5, in a flange part, by overlapping a fiber base material, it forms a predetermined overlap margin and makes it an integral structure, increases the adhesive strength, transmits the acting load, We are trying to improve the strength of FRP molded products.

  Patent Document 6 discloses a fireproof panel which is a sandwich structure having a core material, and the fireproof panel surface is swollen or warped by condensed water remaining between the core materials. It is described that it adversely affects the panel. In Patent Document 6, as a solution to this problem, vent holes (see Patent Document 6 and FIG. 54) are formed in the space of the inorganic board of the female connecting portion, and condensed water discharged from the core material is used during the fireproof structure test. A method for releasing toxic gas or the like to the outside is disclosed. The location where the vent is provided is described as a connecting portion, but there is no description regarding the relationship with the generated stress, and there is no description of the required hole diameter of the vent.

JP 2007-239319 A JP 2008-184803 A Japanese Patent No. 4709305 JP 2011-001727 A JP 2008-65887 A Japanese Patent Laid-Open No. 7-3999

  The FRP soundproof walls described in Patent Documents 1 and 2 have a simple structure, but have a structure in which the stiffener protrudes greatly from the planar soundproof panel portion toward the front side (front side) in the depth direction. In a soundproof wall with such a structure, the neutral axis of bending is in the vicinity of the soundproofing panel, and when subjected to a bending moment due to wind pressure, the bending moment acting on the mounting is reduced in the vicinity of the planar soundproofing panel. Side, back side) is relatively small, but increases with distance from the soundproof panel. As a result, the acting bending moment is increased on the front side of the mounting portion located at a position away from the center of gravity of the soundproof panel portion. For this reason, measures such as increasing the strength of the stiffener and the mounting portion as much as possible and increasing the size of the bolt used in the mounting portion are required.

  In addition to the bending stress, a shear stress is generated in the rib serving as the stiffener. Therefore, the design in consideration of the breaking stress is unavoidable, and the base material needs to be reinforced accordingly. Therefore, reinforcement with an increase in weight is required.

  As is well known, FRP is different from metal and cannot be integrated using welding. In order to improve the strength of FRP attachments, reinforcement using a fiber substrate such as glass fiber is required. is there. However, when reinforcing with a stiffener, an attachment member, or an attachment part, a dimension restriction will arise. Further, when the soundproof wall is formed of FRP, it is substantially impossible to continuously arrange the glass fibers from the stiffener to the attachment portion. As described above, it is difficult to partially reinforce the FRP soundproof wall.

  Further, if the stiffener protrudes greatly from the soundproof panel portion toward the front in the depth direction, the change in wind pressure is amplified by the stiffener and the noise increases. In addition, when the driver's field of view is narrowed by such a stiffener, there is a possibility that signs or the like installed on the soundproof wall are difficult to see.

  In addition, when the height of the wall structure is increased, and when a structure that exhibits different functions is added to the upper end of the wall structure (for example, Patent Document 4), countermeasures against an increasing bending moment are required. It is. There is a need to maintain a simple shape without requiring complex reinforcement, and to provide a mounting portion with good workability while minimizing the bending of the fiber base material. Therefore, a mounting portion having an appropriate opening width is required. Moreover, the attachment part which suppresses the weight increase of a fiber base material and has the suitable height of the inclination board of a 1st board lower part with respect to the total height of the structure for walls is calculated | required.

  FIG. 15 is a cross-sectional view of the soundproof wall of Patent Document 1 along the horizontal plane. As shown in FIG. 15, the FRP soundproof wall 50 of Patent Document 1 has a configuration in which the stiffener 52 protrudes greatly from the planar sound insulating portion 51 toward the front side in the depth direction (Y direction in the drawing). It is a structure with a small number. In the FRP soundproof wall 50, two stiffeners 52 are formed by one soundproof wall. In the FRP soundproof wall 50, when a bending moment due to wind load is received, an excessive bending stress is applied to the vicinity of the mounting hole 53 and to the anchor bolt passed through the mounting hole 53 and screwed into the housing.

  Therefore, in the design of the FRP soundproof wall 50, it is necessary to consider that the strength of the stiffener 52 and the mounting portion 54 is increased as much as possible and the size of the bolt is increased. If the width of the stiffener 52 is increased and the wall thickness is increased, the strength can be increased. However, the weight is greatly increased, and the handleability during construction is hindered. Therefore, it is intended to improve the strength of the mounting portion 54 with a reinforcing member made of a rectangular tube made of FRP containing foamed plastic extending over the entire width of the FRP soundproof wall 50, and the soundproof wall is tall. Accordingly, the height of the rectangular cylindrical body may be increased, the orientation ratio of reinforcing fibers in the axial direction of the FRP rectangular cylindrical body may be increased, or the number of laminated reinforcing fiber bases may be increased. It is said.

  FIG. 16 is a cross-sectional view of the soundproof wall of Patent Document 2 along the horizontal plane. As shown in FIG. 16, also in the FRP soundproof wall 60 of Patent Document 2, the stiffener 63 protrudes greatly from the planar soundproof panel 61 to the near side in the depth direction, and similarly, in the vicinity of the stiffener 63 and the mounting hole 64. It is necessary to consider increasing the bolt size by increasing the strength of the mounting portion 62 as much as possible. Therefore, in the design of the FRP soundproof wall 60, a structure having a larger number of stiffeners 63 than that in Patent Document 1 is used, and the attachment portion 62 is made of a thick FRP to cope with bending stress and shear stress. By enclosing the actual reinforcing member, the strength of the soundproof wall is intended to improve the strength corresponding to the height.

  The sound barriers of these Patent Documents 1 and 2 are more rigid as the stiffener width (thickness in the width direction of the sound barrier) is increased or the number of stiffeners is increased, depending on the height of the sound barrier. Although it is clear that it will be a structure, it will increase the weight of the structure as the materials used will increase, which will not only make the handling easier during construction, but will also increase the labor of manufacturing, increasing the cost of the product It becomes. In order to avoid these problems, in the soundproof walls of Patent Documents 1 and 2, in order to obtain a structure of a mounting portion having a required strength, a reinforcing member made of a rectangular tubular body made of FRP as described above, or It is designed to contain a solid reinforcing member made of thick FRP.

However, the following weights are indispensable as a structure for both of the sound barriers of Patent Documents 1 and 2.
(1) It is disclosed that the planar sound insulation part 51 of Patent Document 1 and the soundproof panel part 61 of Patent Document 2 have a sandwich structure including a core material. Further, in Patent Documents 1 and 2, from the viewpoint of sound transmission loss, a sound insulation part and a sound insulation panel part related to sound insulation performance that require a weight per unit area of 10-60 kg / m ^{2 on} the panel surface of the sound insulation panel part. Is indispensable as the weight of.
(2) The weight of the reinforcing member made of the FRP rectangular cylinder or the thick FRP solid reinforcing member for improving the strength of the mounting portion is indispensable.
(3) The weight of the reinforcing base material necessary to withstand the generated stresses such as bending and shearing at the base corner portion with the mounting portion and the soundproof panel portion at the lower portion of the stiffener is indispensable.

  These are indispensable weights in terms of function and strength as a structure. If the design does not impair handling while suppressing an increase in manufacturing cost, the weight used for the stiffener part is limited, and the width and thickness of the stiffener Must be made as small as the strength allows.

  Therefore, as shown in FIGS. 15 and 16, in Patent Documents 1 and 2, the interval width W1 between adjacent stiffeners is an effective width B necessary for strength against the generated stress caused by bending and shearing of the mounting portion (FIGS. 15 and 16). 16 and the width of the shaded portion in FIG. This means that the stress generated in the mounting portion is increased in proportion to the spacing width W1 between the stiffeners, and there is a problem that the reinforcement of the root corner portion must be performed more carefully and strictly. I understand that.

  However, even if the FRP soundproof walls of Patent Documents 1 and 2 are reinforced, there are restrictions on weight and dimensions. Therefore, when these soundproof walls are formed of FRP, the fibers are continuously connected from the stiffener to the mounting portion. Thus, it is practically impossible to arrange them and has the disadvantage that it is difficult to reinforce. However, in Patent Documents 1 and 2, there is no description regarding this reinforcement, and there is no suggestion about the spacing width W1 between the stiffeners in the mounting portion.

  On the other hand, the wall structure of Prior Patent Document 3 has only one surface of a tetrahedron formed of a continuous fiber base material without the stiffener protruding greatly toward the front like the FRP soundproof walls of Patent Documents 1 and 2. However, since the mounting part has a form opened to the front, and the structure of the mounting part is solid, the root corner part as described in Patent Documents 1 and 2 can be obtained while studying prototypes and strength tests. It is possible to suppress the increase in weight due to unnecessary reinforcement without complicated reinforcement, and it is possible to provide a mounting portion with an appropriate opening width that does not hinder workability during mounting. I understood it.

  Next, the height of the inclined plate will be described. The structure for walls of patent documents 1-3 is a cantilever structure which fixes the attachment part of a lower end to a housing. Therefore, a bending moment expressed by a quadratic function is applied to the wall structures disclosed in Patent Documents 1 to 3, and is 0 at the upper end and maximizes at the lower end, whereby the bending stress generated in the main body. However, it increases in a quadratic function as it approaches from the upper end to the lower end.

  FIG. 11 of Patent Document 3 describes an embodiment in which the entire first plate 110 is inclined so as to move away from the second plate in the height direction Z from the upper end toward the lower end. It was not a problem when the height of the wall structure was low, but it was necessary to increase the cross-sectional area of the outer plate and the inner rib as the height of the wall structure increased, Along with this, it was found that the weight of the wall structure increased more than necessary, and the handleability during construction deteriorated.

  The present invention has been made to solve such a problem, and suppresses the input amount of the fiber base material while providing a mounting portion corresponding to an increase in bending moment, and an increase in wind load. An object of the present invention is to provide a wall structure that can withstand the fiber base material and can ensure the reliability even when the height is increased by making the structure capable of withstanding and preventing peeling of the fiber base material. .

  The wall structure according to the present invention includes a first plate arranged such that a plate thickness direction is a depth direction when three directions orthogonal to each other are a depth direction, a width direction, and a height direction; Thickness between the first plate and the second plate, the second plate disposed opposite the first plate so that the thickness direction is the depth direction on the back side in the depth direction of the first plate Are arranged at intervals in the width direction so that the direction is the width direction, each extends in the height direction, the end on the near side in the depth direction is integrally provided on the first plate, and the depth And a plurality of inner ribs integrally provided on the second plate, and the lower ends of the first plate, the second plate, and the inner rib such that the plate thickness direction is the height direction. Is arranged in the depth direction, the end on the far side in the depth direction is formed integrally with the lower end of the second plate, and the end on the near side in the depth direction is 1 plate is a lower end integrally formed of, a portion extending in the width direction includes a integrally formed with the bottom plate and the lower end portion of the inner rib, the.

  The wall structure includes a back plate which is a lower portion of the second plate, a pair of side plates which are lower portions of a pair of adjacent inner ribs among a plurality of inner ribs, and a pair of side plates of the bottom plate. A concave mounting portion is formed which includes a partial bottom plate which is an intermediate portion and is open to the near side in the depth direction.

  In the wall structure, an inclined plate that is inclined from the lower side of the first plate toward the inner side in the depth direction branches downward, and the lower end portion of the inclined plate is the upper end portion of the back plate. It is provided integrally.

  The first plate, the second plate, the inner rib, the bottom plate, the top plate, the pair of outer plates, and the inclined plate are formed from a continuous fiber base material, and constitute a wall structure made of FRP.

In the wall structure, (1) a mounting hole penetrating in the height direction is formed in the partial bottom plate, and an opening width W in the concave shape of the mounting portion satisfies the following formula (1), and the height of the inclined plate is A height h from the upper surface of the bottom plate in the vertical direction satisfies the following expression (2).
2D ≦ W ≦ 1.5 × (D + 2e) (1)
However, in Formula (1), D is a hole diameter of an attachment hole, and e is a margin length which is the length from the near end of the depth direction in the partial bottom plate to the center of the attachment hole.
0.15H ≦ h ≦ 0.3H (2)
However, in Formula (2), H is the total height of the structure for walls.

The present inventors suppress the increase in weight caused by increasing the height of the wall structure as much as possible, and consider the bending stress distribution in consideration of the bending stress distribution (three times the wind load of 3 kN / m ² ). As a result of repeated trial manufacture and strength test to obtain a structure that can achieve a strength that can not be broken by the load of the first load, the front side is the lower side of the first plate relative to the total height of the structure. Obtained the knowledge that there is an appropriate range in the height direction from the top surface of the bottom plate of the first plate inclined integrally with the front side end of the top surface of the bottom plate. .

  In addition, in consideration of the mounting workability at the time of installation, when the height of the wall structure is low in the positional relationship between the mounting portion opening in a concave shape toward the front and the inclined portion height of the first plate If at least the starting point of the inclined portion of the first plate is the same position as the branch point of the inclined plate of the mounting portion and the first plate on the near side, and the wall structure is tall, In order to maintain the required strength of the attachment portion, the inclination start point of the inclined portion of the first plate is maintained without changing the height position of the branch point between the inclined plate of the attachment portion and the first plate on the near side. It has been found that the configuration in which is inclined to a position higher in the height direction than the branch point with the first plate is a more preferable form in terms of weight, cost, strength, and the like.

  According to such a wall structure, since the attachment portion is provided with the inclined plate, it is possible to easily perform an operation from the oblique upper side with respect to the attachment portion. In the wall structure, by setting the opening width W satisfying the above formula (1), it is possible to form a mounting portion having an appropriate opening width W, and to maintain a simple shape without requiring complicated reinforcement. It is possible to realize a mounting portion with good workability while minimizing the bending of the fiber base material. Moreover, since complicated reinforcement is unnecessary, an increase in the weight of the fiber base material can be avoided.

  Further, in the wall structure of the present invention, when the mounting holes are provided separately on the deep side and the near side in the depth direction with respect to the neutral surface of the wall structure, the bottom plate and the mounting portion ( The bending stress applied to the attachment means) can be further reduced. Therefore, it is not necessary to improve the strength of each part of the wall structure or reinforce the attachment part, and the increase in the weight of the wall structure can be suppressed. As a result, the weight of the wall structure can be further reduced in combination with the hollow structure.

  Moreover, since the wall structure of the present invention is made of FRP, it is lightweight and has excellent handleability. In addition, when the outer surface of the first plate is a flat surface, generation of fluttering sound due to wind and irregular reflection sound of sound from the vehicle is suppressed. In addition, when the outer surface of the first plate is a flat surface, the visual field of the driver of the vehicle is not hindered, and the visibility of signs and the like is improved. As a result, it is suitable as a wall structure for constructing walls along railways, roads, and the like.

  Here, in the wall structure, (2) the edge length e is 1.2 times or more the hole diameter D of the mounting hole.

  For example, when the edge length e is too small with respect to the hole diameter D of the attachment hole, the edge portion thickness (= e−D / 2) of the FRP becomes small, and the force acting from the bolt is applied to the attachment portion. It is difficult to transmit to the left and right side plates. In general, when the material is metal, the edge length e is one time the hole diameter D of the mounting hole.

  The wall structure is (3) arranged at the upper end of the first plate so that the thickness direction is the height direction, and the end on the near side in the depth direction is integrated with the upper end of the first plate. And the top plate formed opposite to each other so that the thickness direction is the width direction, arranged at both ends in the width direction, the end on the near side in the depth direction is the end in the width direction of the first plate A continuous fiber base material comprising a pair of outer plates formed integrally with the portion and constituting the second plate extends to the outer surface of the pair of outer plates, the outer surface of the top plate, or the outer surface of the bottom plate doing.

  And the improvement of the intensity | strength of a corner part by the improvement of the overlapping method of a fiber base material in the corner part (ridgeline) of a 2nd board or a 1st board and both outer side boards is calculated | required. According to the wall structure of the present invention, the continuous fiber base material of the second plate extends to the outer surface of the pair of outer plates, the outer surface of the top plate, and the outer surface of the bottom plate, and is laminated and integrated. Thereby, in the compressive stress side by a wind load, peeling of the continuous direction of a continuous fiber base material can be suppressed, and generation | occurrence | production of peeling failure can be prevented. As a result, a wall structure capable of withstanding a large wind load can be realized. Furthermore, according to the wall structure, the continuous fiber base material constituting the second plate is continuous to the outer surface of the pair of outer plates, the outer surface of the top plate, and the outer surface of the bottom plate. And can withstand the stress caused by changes in wind direction. As a result, it is possible to withstand long-term fatigue and to extend the life of the wall structure.

  FIG. 9 is a cross-sectional view of the conventional wall structure along the horizontal plane, and is an enlarged view of the flange portion. As shown in FIG. 9A, the overlapping flange 126 includes a first plate 110, an outer plate 123, an inner rib 130 on the side closest to the outer plate 123, and an inner layer plate facing the first plate 110. It is formed so as to project outward (X direction) from the rectangular body constituted by 124. Specifically, the flange 126 has an integral structure in which a projecting plate 125 projecting from the inner layer plate 124 is superimposed on the projecting portion 120a of the second plate 120. When the height of the wall structure is low, the strength of the flange 126 is sufficient because the test load applied in the strength test is small.

  However, as a tall wall structure is developed, the load applied in the strength test also increases. As shown in FIG. 9B, before the above breaking strength is reached in the overlapping flange 126, as shown in FIG. It has been found that there is a possibility that peeling may occur between the second plate 120 and the outer plate 123 and the required specifications may not be satisfied. In particular, it can be seen that peeling occurs on the side opposite to the wind load side (load load side) where compressive stress occurs, and stress exceeding the above-mentioned adhesive strength acts, and long-term durability considering stress fluctuations due to wind direction Considering the properties, there is a possibility that peeling exceeding the adhesive strength may occur, and it is necessary to devise the fiber base material stacking method even in the receiving recesses and the top plate portion and bottom plate bottom surface of the overlapping flange described later. I understood that.

  In the wall structure, (4) the inclined plate is formed with a first vent hole penetrating in the plate thickness direction, and the inner rib is formed with a second vent hole penetrating in the plate thickness direction. ing.

  According to the wall structure having such a configuration, since the air holes having a predetermined hole diameter are formed, the hollow structure portion partitioned by the first plate, the second plate, and the inner ribs connecting them, It has a configuration that allows ventilation to the outside. Thereby, the volume change of the hollow part in the structure for walls by the temperature change can be prevented. Therefore, the swelling or dent of the first plate and the second plate between the inner ribs can be prevented. In addition, the condensed water can be discharged from the second ventilation hole formed in the inclined plate of the mounting portion, so that the strength of the wall structure can be prolonged by avoiding a decrease in strength due to water absorption and moisture absorption. Can be planned.

  Moreover, it is preferable that the 1st ventilation hole is provided in the back | inner side lower part which is a structurally rigid part of an inclination board. Moreover, it is preferable that the 2nd ventilation hole is provided in the inner rib on a bending neutral axis | shaft in the structure of a part higher than an attachment part.

  The swelling of the soundproof panel surface in the FRP soundproof wall of Patent Documents 1 and 2 is caused by an increase in the outside air temperature, an air pool in a location due to poor adhesion between the core material and the skin layer, and a residual volatile gas of the matrix resin, If shrinkage is repeated, peeling of the core material and the skin layer progresses, causing a decrease in strength of the main body, but no means for solving this is described.

  The wall structure of Patent Document 3 has a hollow interior (see Prior Patent Document 3, FIG. 2) and forms an independent sealed space partitioned by inner ribs. In the case of the structural body, the bulge or dent between the inner ribs is remarkable due to the temperature difference between the outside air temperature and the inside of the structural body. When the air in the sealed space is repeatedly expanded and contracted, stress that does not occur originally is generated at the connecting portion between the inner rib and the first plate and the second plate, and breakage may occur from this point. Further, when the temperature is low, condensed water is generated due to condensation of water vapor in the sealed space, and there is a risk that not only the connecting portion but also the overlapping portion, and thus the strength of the entire structure may be reduced. For that purpose, it is necessary to provide a vent hole having an appropriate diameter that connects the sealed individual spaces at a location where the strength of the member constituting the wall structure is not reduced. The present inventors conduct a tensile test using a test piece with a hole and a strength test using a real product, and eliminate a bulge or a dent without affecting the strength of the main body, and a through-hole capable of discharging condensed water. We found out which size and where it is preferable to provide it.

  In the wall structure, at least one vent hole having a hole diameter d of 3 to 8 mm is provided at a lower position in the height direction on the back side in the depth direction of the inclined plate formed with the mounting portion, and a plurality of inner ribs are provided. It is preferable to provide at least two vent holes with a hole diameter d of 3 to 8 mm in the height direction at substantially the center in the depth direction.

  Since the wall structure of the present invention is provided with the inclined plate at the mounting portion, it is easy to perform the work performed obliquely from above toward the mounting portion, considering the bending moment distribution due to the acting wind load, and the wall structure. The height of the inclined portion at the lower part of the first plate is changed in accordance with the total height of the first plate, the opening width of the mounting portion is made as small as possible, and when viewed from the height direction, at least a part of the mounting portion is attached to the mounting portion. By placing it in the structure on the higher side, the neutral surface of the wall structure when subjected to a bending moment about the axis extending in the width direction is placed in the structure on the higher side than the mounting portion. Because it is housed or positioned in the vicinity, bending stress on the bottom plate and mounting means and load on the housing can be reduced, and the required strength of the mounting part is avoided while avoiding a significant increase in the weight of the wall structure. Can secure a tall wall It can also be corresponding to the structure.

It is a perspective view which shows 1st Embodiment of the structure for walls of this invention. It is sectional drawing which follows the XY plane of the structure for walls shown in FIG. 1, and is sectional drawing of the part above an attaching part. It is sectional drawing which follows the height direction (ZY surface) of the structure for walls shown in FIG. It is sectional drawing in alignment with the height direction (ZX surface) of the structure for walls shown in FIG. 1, and is sectional drawing when seeing a back side from this side. It is sectional drawing which follows the XY plane in the attachment part of the structure for walls shown in FIG. 1, and is sectional drawing when a lower part is seen. It is a perspective view which shows the construction example of the structure for walls which concerns on 1st Embodiment of this invention. It is a perspective view which shows 2nd Embodiment of the structure for walls of this invention. It is sectional drawing which follows the height direction (ZY surface) of the structure for walls shown in FIG. It is sectional drawing which follows the XY plane of the structure for walls. It is sectional drawing which follows the XY plane of the side part structure of the structure for walls concerning the embodiment of the present invention. It is sectional drawing which follows the height direction (ZY surface) of the structure for walls concerning the embodiment of the present invention. It is sectional drawing to which a part of FIG. 10 was expanded. It is a perspective view which shows 3rd Embodiment of the structure for walls of this invention. It is sectional drawing of the part above the attaching part of the structure for walls which concerns on 3rd Embodiment of this invention. It is sectional drawing in alignment with the horizontal surface of the soundproof wall of patent document 1. FIG. It is sectional drawing which follows the horizontal surface of the soundproof wall of patent document 2. FIG. It is a diagram which shows the strength test result using the same test piece as the material which comprises the structure for walls of this invention, and shows the relationship between the hole diameter of a ventilation hole, and tensile strength.

  Hereinafter, as a form for implementing this invention, the structure for walls is demonstrated in detail, referring drawings.

  FIGS. 1-5 is a figure which shows 1st Embodiment of the structure for walls of this invention. For convenience of description, a depth direction (Y-axis direction), a width direction (X-axis direction), and a height direction (Z-axis direction) that are orthogonal to each other are set. In the case of this first embodiment, for example, referring to FIG. 3, the illustrated left-right direction Y is the depth direction, the left side is the back side, and the right side is the front side. Further, the direction perpendicular to the paper surface of FIG. 3 is the width direction (X). Further, the illustrated vertical direction Z is the height direction, the upper side is the higher side, and the lower side is the lower side.

  The wall structure 100 includes a first plate 110, a second plate 120, a plurality of inner ribs 130, a bottom plate 140, a top plate 150, and outer plates 123 and 123. The first plate 110, the second plate 120, the plurality of inner ribs 130, the bottom plate 140, the top plate 150, and the outer plates 123 and 123 are FRP members formed from a continuous fiber base material.

  The first plate 110 is a plate-like member formed in a rectangular shape when viewed from the thickness direction. The first plate 110 is disposed such that the thickness direction coincides with the depth direction Y. The first plate 110 constitutes a front surface of the wall structure 100. The outer surface (front surface) of the first plate 110 is a skin surface (flat surface). At the lower end portion of the first plate 110, an inclined portion 122 that is inclined toward the near side as it goes downward is formed.

  The second plate 120 is a plate-like member formed in a rectangular shape when viewed from the thickness direction. The second plate 120 is disposed on the back side of the first plate 110 (the back side in the depth direction) so as to face the first plate 110 so that the plate thickness direction matches the depth direction Y. Further, the lower part of the second plate 120 is a back plate 121.

  The plurality of inner ribs 130 are plate-like members formed in a substantially rectangular shape when viewed from the plate thickness direction. The inner ribs 130 are arranged between the first plate 110 and the second plate 120 with an interval in the width direction X so that the thickness direction coincides with the width direction X. Each of the plurality of inner ribs 130 extends in the height direction Z. Further, the end of the inner rib 130 on the near side in the depth direction Y is integrally provided on the first plate 110, and the end on the far side in the depth direction is integrally provided on the second plate 120.

  A portion on the lower side, which is a part of the inner rib 130, constitutes a side plate 131 whose length in the depth direction Y increases as it goes downward. The inclined portion 122 of the first plate 110 is inclined toward the front side toward the lower side corresponding to the size of the side plate 131 of the inner rib 130. A box structure is formed by the inclined portion 122 of the first plate 110, the back plate 121, which is the lower portion of the second plate 120, and the pair of side plates 131 adjacent in the width direction X. In the wall structure 100 of the present embodiment, an attachment portion 160 for fixing the wall structure 100 to a housing or the like is formed in a portion on the lower side in the height direction Z.

  The inner rib 130 may be formed continuously from the upper end to the lower end in the height direction Z of the wall structure 100 or may be partially formed in the height direction Z. A part of the inner rib 130 may be a lower portion in the height direction Z, a higher portion in the height direction Z, or an intermediate portion in the height direction Z. May be.

  Since the bending moment applied to the inner rib 130 increases as it approaches the bottom plate 140, such a configuration including the inclined portion 122 and the side plate 131 is beneficial for suppressing bending stress. This is suitable when the wall structure 100 of the present invention is used as a high soundproof wall.

  The outer plate 123 is a plate-like member formed in a substantially rectangular shape when viewed from the plate thickness direction. The pair of outer plates 123 are disposed opposite to each other in the width direction X so that the plate thickness direction coincides with the width direction X. Each of the pair of outer plates 123 extends in the height direction Z, and has an upper end portion formed integrally with the top plate 150 and a lower end portion formed integrally with the bottom plate 140. Each of the pair of outer plates 123 has an end on the near side in the depth direction Y formed integrally with the first plate 110, and an end on the back side in the depth direction Y integrated with the second plate 120. Is formed.

  In addition, a flange 126 that protrudes outward in the width direction X is formed on one side of both ends of the second plate 120 in the width direction X. In the height direction Z, the flange 126 extends from a position corresponding to the bottom plate 140 to a position corresponding to the top plate 150.

  Moreover, the receiving recessed part 127 dented from the back | inner side of the depth direction Y to the near side is formed in the other side among the edge parts of the both sides of the width direction X in the 2nd board 120. As shown in FIG. In the height direction Z, the receiving recess 127 extends from a position corresponding to the bottom plate 140 to a position corresponding to the top plate 150.

  FIG. 6 is a perspective view showing a construction example of the wall structure according to the first embodiment of the present invention. As shown in FIG. 6, the flange 126 is configured to be able to fit with the receiving recess 127 of the wall structure 100 arranged adjacent to the width direction X. Specifically, the surface facing the front side of the flange 126 and the surface facing the back side of the receiving recess 127 can be brought into contact with each other.

  In the wall structure 100, sound diffraction occurs at the contact portion between the flange 126 and the receiving recess 127, and the noise reduction effect is exhibited. Although not shown, in general, a cushion packing extending in the height direction is attached to the gap in the depth direction at the overlapping portion of the adjacent wall structures, and leakage of sound generated in the track is prevented. It is preventing.

  The bottom plate 140 is a plate-like member formed in a substantially rectangular shape when viewed from the plate thickness direction. The bottom plate 140 is disposed at the lower ends of the first plate 110, the second plate 120, the inner rib 130, and the outer plate 123. The bottom plate 140 has an end on the far side in the depth direction Y formed integrally with a lower end of the second plate 120, and an end on the near side in the depth direction Y has a lower end of the first plate 110 (of the inclined portion 122. And the lower end). The bottom plate 140 is formed with a partial bottom plate 141 used between the pair of side plates 131 and 131 adjacent to each other in the width direction X for fixing the wall structure 100 to a housing or the like.

  The bottom plate 140 is formed integrally with the lower end portion of the inner rib 130 (the lower end portion of the side plate 131) between the rear end portion in the depth direction Y and the front end portion. Both ends of the bottom plate 140 in the width direction X are integrally formed with the lower ends of the pair of outer plates 123, respectively.

  The top plate 150 is a plate-like member formed in a substantially rectangular shape when viewed from the thickness direction. The top plate 150 is disposed at the upper ends of the first plate 110, the second plate 120, the inner rib 130, and the outer plate 123. The top plate 150 has an end on the far side in the depth direction Y formed integrally with the upper end of the second plate 120, and an end on the near side in the depth direction Y integrally formed with the upper end of the first plate 110. Is formed.

  The top plate 150 is formed integrally with an upper end portion of the inner rib 130 at a portion between the end portion on the back side in the depth direction Y and the end portion on the near side. The top plate 150 is formed integrally with the upper ends of the pair of outer plates 123 at both ends in the width direction X. Therefore, the wall structure 100 is configured to have a hollow box structure partitioned by the inner ribs 130.

  Further, on the lower side of the first plate 110, an inclined plate 111 that is inclined so as to go to the back side in the depth direction Y as it goes downward is branched. The lower end of the inclined plate 111 in the height direction Z is provided integrally with the upper end of the back plate 121. For example, when the inclined plate 111 is configured to be coupled to the back plate 121 at a right angle, the stress concentration at the corner portion that is the coupling portion increases, and peeling or the like may occur at the corner portion, which may be a starting point of fracture. There is. The wall structure 100 according to the present embodiment includes the inclined plate 111 and relaxes stress concentration at the joint portion between the inclined plate 111 and the second plate 120 by the same effect as the inclined portion 122, and peeling occurs. The fear can be reduced. Thereby, the highly reliable wall structure 100 can be realized. In addition, it is preferable that the inclination | tilt angle of the inclination board 111 is 30 degrees-60 degrees with respect to a horizontal surface.

  Here, in the wall structure 100 of this embodiment, the concave shape is formed of the inclined plate 111, the back plate 121, the pair of adjacent side plates 131 and 131, and the partial bottom plate 141, and is opened to the near side in the depth direction Y. A mounting portion 160 having an opening is formed. In other words, the mounting portion 160 is configured by the second plate 120, a pair of adjacent inner ribs 130 and a part of the bottom plate 140 that are adjacent to each other, and the inclined plate 111 that extends from the first plate 110. Therefore, the reinforcing fiber base material can be easily arranged continuously. That is, by eliminating the discontinuity of the reinforcing fiber base material, complicated reinforcement at the root corner portion as in Patent Documents 1 and 2 becomes unnecessary. Therefore, by avoiding unnecessary weight increase due to such complicated reinforcement, it is possible to obtain a wall structure 100 that is lighter, more robust, structurally stable, and easy to handle than the prior art. Can do.

  In the wall structure 100 of the present embodiment, the attachment portions 160 are formed at three locations that are separated from each other in the width direction X, respectively. The number of mounting portions 160 is not limited to three, and can be set according to an increase in the width and height H of the wall structure, that is, an increase in bending moment. The number of attachment portions 160 may be two, or four or more.

  The partial bottom plate 141 is provided with a mounting hole 142 penetrating in the height direction Z. The attachment hole 142 functions as an attachment means for attaching the wall structure 100 to a fixing part such as a housing. The attachment means includes a bolt 310 rising from a housing of the attachment destination, a nut 500 fitted to the bolt 310, and a metal seat plate 400 used for dispersing a supporting pressure when the nut 500 is tightened. It is set as the structure provided. The seat plate 400 is formed in a rectangular shape, for example, as viewed from the thickness direction. The seat plate 400 is formed with a through hole penetrating in the thickness direction, and a bolt is inserted into the through hole.

  When the wall structure 100 is fixed to the housing 300, first, the bolt 310 is inserted through the attachment hole 142. Next, the seat plate 400 is attached to the bolt 310 protruding upward from the partial bottom plate 141, and the nut 500 is attached. Then, the wall structure 100 is fixed to the housing 300 by tightening the nut 500 with an appropriate force.

  Note that the attachment means for fixing the wall structure 100 to a structure such as the housing 300 is not limited to those using bolts and nuts, and the wall structure 100 is fixed using other known means. May be.

  In the wall structure 100 of the present embodiment, two attachment holes 142 are provided in one attachment portion 160, but the number of attachment holes may be one or three or more. Further, the mounting holes 142 may be arranged in a staggered manner. Moreover, the shape of the attachment hole 142 may be circular, a long hole long in the width direction X, or a long hole long in the depth direction Y.

  Now, in the wall structure 100, a neutral surface N is formed when a bending moment about the X axis is received by wind load at a portion higher than the mounting portion 160 (see FIG. 3). The neutral surface N is a surface formed by a portion that does not expand and contract in the wall structure 100 when receiving a bending moment.

  As shown in FIG. 3, a neutral surface N exists in the center between the first plate 110 and the second plate 120 facing each other above the attachment portion 160. That is, the neutral plane N exists in the plurality of inner ribs 130 provided at predetermined intervals in the width direction X. The neutral surface N is a portion where the generated stress is the lowest in the wall structure 100.

  In the wall structure 100, a plurality of vent holes 180 are provided in the plurality of inner ribs 130. The vent hole 180 is preferably arranged corresponding to the position of the neutral surface N of the inner rib 130. Thereby, strength reduction due to perforation can be suppressed, which is preferable. In the present embodiment, three vent holes 180 are provided for each inner rib 130, but it is preferable to provide at least two or more vent holes 180. However, in order to avoid a decrease in the strength of the inner rib due to a cross-sectional defect in the vent hole, the preferable hole diameter of the vent hole 180 is 3 to 8 mm which is 1/8 to 1/10 or less of the width in the Y-axis direction of the inner rib. Preferably there is. The ventilation holes 180 allow adjacent hollow spaces to communicate with each other and allow ventilation.

  The wall structure 100 is provided with a plurality of ventilation holes 180 in the attachment portion 160. As shown in FIG. 3, the vent hole 180 is preferably provided in the inclined plate 111 at a portion (Y-shaped portion) where the inclined plate 111 and the back plate 121 are integrated. The ventilation hole 181 communicates the hollow space inside the wall structure 100 and the outside of the wall structure 100, and ventilates the outside air and condenses in the wall structure 100. Discharge water to the outside.

  The portion where the inclined plate 111 and the back plate 121 are integrated is a portion where the stress concentration is relaxed as described above, and by providing the vent hole 180 at this portion, it is possible to suppress a decrease in strength due to drilling. The vent hole 181 also preferably has a hole diameter of 3 to 8 mm in order to avoid stress concentration due to drilling.

  Further, as shown in FIG. 2, the wall structure 100 is provided with a ventilation hole 182 between the mounting portions 160 and 160 (inner ribs) adjacent to each other in the width direction X. The ventilation hole 182 is provided in the bottom plate 140 at a portion (L-shaped portion) where the bottom plate 140 and the second plate 120 are integrated. The air hole 182 communicates the hollow space inside the wall structure 100 and the outside of the wall structure 100, and ventilates the outside air and condenses the wall structure 100. Discharge water to the outside.

  Further, in the case of the wall structure 100, the bottom plate 140 has a neutral surface N1 when receiving a bending moment about the X axis extending in the width direction, as shown in FIG. When the cross section is taken along, the neutral plane N1 is recognized as a neutral axis. The mounting holes 142 in FIGS. 3 to 5 can be provided separately on the back side and the near side in the depth direction Y with respect to the neutral surface N1, so that a large eccentric load due to misalignment does not occur, and the bottom plate 140 The bending stress applied to the attaching means such as the bolt 310 and the nut 500 and the load applied to the housing are reduced. As a result, it is not necessary to increase the strength of each part of the wall structure 100 or to strengthen the attachment means such as the bolt 310 and the nut 500, and the wall structure 100 is coupled with the hollow structure of the wall structure 100. Becomes lighter.

  The FRP sound barriers of Patent Documents 1 and 2 that are the prior art are composed of a mounting part, a soundproof panel, and a stiffener that protrudes to the front, and the mounting part is open to the front side and the height direction. Has been.

  As shown in FIGS. 1 and 5, the wall structure 100 has only one surface of a tetrahedron constituted by a pair of side plates 131, 131, a back plate 121, an inclined plate 111, and a partial bottom plate 141 facing each other. It has the attachment part 160 of the open concave shape structure. Therefore, the strength design of the attachment portion 160 may be designed separately as a three-side fixed slab structure. The required thickness is obtained by comparing the stress obtained by dividing the acting bending moment by the section modulus obtained by the thickness of the partial bottom plate 141 and the opening width W with the material strength. Since the wall structure 100 is hollow, there is an advantage that even if the width in the width direction X of the inclined portion 122 between the attachment portions 160 is increased, there is no significant increase in weight. In other words, the opening width W of the attachment portion 160 can be set to an appropriate width W that does not hinder the attachment operation, and a more robust and stable structure can be obtained.

As a result of studying an appropriate range of the opening width W in the concave shape of the mounting portion 160, it is preferable that the opening width W satisfies the following expression (1).
2D ≦ W ≦ 1.5 × (D + 2e) (1)
However, in said Formula (1), D is a hole diameter of the attachment hole 142, and e is a lip length which is the length from the near end of the partial bottom plate 141 in the depth direction Y to the center of the attachment hole 142. It is.

  In setting the lower limit of the opening width W, a verification test was performed. A mock-up of a full-size mounting part with a mounting hole with a hole diameter of 40 mm is taken into account, taking into account the width of the construction gap, and this mock-up is installed on an M16 anchor bolt provided on the concrete floor for commercial work. Using an architectural ratchet wrench (runout width of 15 °), which is a tool, an operation of fitting and tightening a nut was performed. As a result, in consideration of the deflection width of the work tool and the position of the attachment hole in the depth direction Y, in order to prevent the work tool from hitting the attachment part, it is twice the hole diameter of the attachment hole, that is, W = 2D. I understood it.

  Further, in setting the upper limit of the opening width, the bending stress and the shear stress generated when the three-side fixed slab structure was designed were verified. The theoretical opening width W in which both bending stress and shear stress are balanced is W = (2e + D). However, it has been empirically known that when the mounting portion is constituted by FRP, the acute angle shape at the root corner portion causes stress concentration, and fracture occurs from this point. For this reason, in the design of a structure made of FRP, it is usual to provide an R portion at each corner portion to eliminate acute bending lamination of reinforcing fibers.

Therefore, the opening width must be larger than theoretically, but in order to make the mounting part with an opening width that can withstand the generated stress without increasing the wall thickness (plate thickness) of the partial bottom plate, Since it is practically difficult to model R, a full-scale structure having a frontage of 1.2 times and 1.5 times the theoretical opening width is manufactured, and the wind load, which is a strength requirement, is 3 kN / m. A load corresponding to a breaking strength 3 times ² was applied.

  When the opening width W was W = 1.2 × (2e + D), the anchor bolt was bent and no cracks or the like occurred in the mounting portion 160. When the opening width W was W = 1.5 × (2e + D), cracks in the attachment portion 160 were recognized although they were slight.

  From this, it was found that the upper limit of the opening width W was W = 1.5 × (2e + D). Preferably, W = 1.2 × (2e + D).

  Of course, the thickness of the partial bottom plate can be increased by increasing the thickness as in Patent Documents 1 and 2, but the weight increases and the cost increase due to the increase in material is unavoidable. When the mounting hole 142 of the wall structure is a long hole in the width direction as shown in FIG. 5, the opening width W corresponds to the long axis width + 20 mm or more on one side and the short axis b. It was revealed from the strength test that it is preferable to set W = 1.5 × (2e + D1) or less as the circular hole diameter D1. Here, the edge length e is preferably 1.2 times or more the hole diameter D of the mounting hole 142. The reason why the edge length e is not set to 1.2 times or less is to prevent crushing due to a load in the horizontal direction.

  For example, if the edge length e is too small with respect to the hole diameter D of the attachment hole 142, the FRP edge thickness (= e−D / 2) is reduced, and the force acting from the bolt 310 is attached. It is difficult to transmit to the side plates 131 on both the left and right sides of the portion 160. In general, when the material is metal, the edge length e is one time the hole diameter D of the mounting hole.

  Next, examination about the appropriate height of the inclined portion 122 was performed.

  As shown in FIGS. 1 and 3, in the wall structure 100, a branch point (bending point) 112 from the first plate 110 of the inclined plate 111 inclined toward the back side in the depth direction Y, and an inclined portion The start position of 122 from the first plate 110 (hereinafter referred to as the inclined portion start point 113) is at the same position.

  7 and 8 are views showing a wall structure according to a second embodiment of the present invention. The wall structure 100B according to the second embodiment shown in FIGS. 7 and 8 is different from the wall structure 100 of the first embodiment in that the inclined portion start point 113 is higher than the branch point 112 in the height direction. It is a point at a high position in Z.

Table 1 below shows the results of studies on the height H of the wall structure and the height h of the slope starting point.

  When the total height was 1.2 m, 2 m, and 2.5 m, the height j of the branch point 112 and the height h of the inclined portion start point 113 were set to the same position. In the case of the total height or higher, the height j of the branch point 112 is constant, and the height h of the inclined portion start point 113 is changed. φ is the generated stress / material fracture stress obtained from the analysis result, and it was determined that φ ≦ 0.7 in consideration of variation in material strength. In addition, a strength test was performed on those with φ ≦ 0.7, and the determination was made based on the presence or absence of breakage (including cracks), and the determination combined with the above determination was performed.

その結果、傾斜部１２２の高さｈは、壁用構造体１００の全高さＨに対して、０．１５Ｈ以上、０．３Ｈ以下の範囲に設定できることがわかった。 Table 2 below shows a comparison of the total weight of the wall structure when the height H of the wall structure is the same and the height h of the slope starting point is set higher than the branch point.

As a result, it was found that the height h of the inclined portion 122 can be set in a range of 0.15H or more and 0.3H or less with respect to the total height H of the wall structure 100.

  Next, the influence of the temperature difference between the outside air temperature and the inside temperature will be described for the wall structure. The interior of the wall structure 100 is hollow, and a space partitioned by inner ribs 130 is formed. When the wall structure in which the sealed space is formed is exposed to the outside, the first plate 110 and the second plate between the inner ribs 130 due to a temperature difference between the outside air and the inside of the wall structure 100. There is a possibility that a bulge or a dent may occur in 120.

  In order not to cause this bulge or dent, a vent hole for ventilating the inside and the outside of the wall structure may be provided. In order to provide a vent hole at a location where the strength of the member constituting the wall structure is not reduced, it is possible to place it on a neutral shaft. However, since it is unclear which size of the through hole is preferable without affecting the strength of the main body of the wall structure, it is necessary to set a more appropriate hole diameter than a tensile test using a test piece with holes. Finally, a strength test was conducted on a full-scale wall structure having a vent hole drilled, and it was confirmed that there was no problem.

  FIG. 17 shows the result of a tensile test using the same test piece as the material constituting the wall structure of the present invention, and is a diagram showing the relationship between the hole diameter of the air hole and the tensile strength. Here, using the material constituting the wall structure 100 according to the present embodiment, a test piece having the same laminated structure as the wall structure is created, and a hole corresponding to the vent hole 180 is drilled in the test piece. Then, a tensile test was performed. FIG. 17 shows the ratio of the strength of the unperforated test piece divided by the strength of the unperforated test piece on the vertical axis and the diameter of the perforated hole on the horizontal axis, where the strength of the unperforated test piece is 1. It is a plot. As a result of the test, it was found that the strength suddenly decreased when the hole diameter was 8 mm or more. Considering the workability of drilling and the like, it has been found that the hole diameter of the vent hole 180 is preferably 3 to 8 mm, and more preferably 5 to 6 mm.

  Next, a verification test was performed using a full-size test body of the wall structure 100 of the present embodiment. As shown in FIG. 3, the test body was provided with a ventilation hole 180 having a hole diameter of 8 mm at three locations for each inner rib 130, and a ventilation hole 181 was provided at one location in the inclined plate 111. In any of the above specimens, the breakage starting from the vent holes 180 and 181 did not occur.

  The level 2 specimens in Table 1 above were disassembled after being broken and observed, but it was found that no breakage occurred around the vent holes. The present inventors are exposing the actual object having the above structure to the outdoors, and no swelling or dent was observed even after 2 years from the start, and no peeling due to the swelling occurred.

  Moreover, further knowledge was obtained through the above-mentioned full-scale specimen. This will be described below.

  9A and 9B are cross-sectional views of the overlapping flange 126 viewed from the height direction of the wall structure 100. FIG. FIGS. 9A and 9B show the base material configuration adopted in the conventional wall structure 100. The wall structure shown in FIG. 9 is of a type having a height of about 1.2 m and a low height.

  As shown in FIG. 9A, the wall structure 100 includes a first plate 110, an outer plate 123, an inner rib 130 on the side closest to the outer plate 123, and a first plate in the overlapping flange 126. A rectangular body composed of an inner layer plate 124 facing 110 is provided.

  The wall structure 100 employs a structure in which the second plate 120 is superimposed on a projecting plate 125 extending to the overlapping flange 126 outside the rectangular body.

  In the wall structure of a type with a low height, the load applied in the strength test is also relatively small, so that the peeling force between the flange 126 and the overhanging plate 125 is also small. In such a base material structure by the conventional overlapping method, the adhesive strength between the flange 126 and the overhanging plate 125 is sufficient, and no peeling or the like occurs.

  However, as a result of conducting a strength test under a relatively large load as a tall wall structure was developed, before reaching the specified breaking strength, as shown in FIG. In 126, peeling occurred between the second plate 120 and the outer plate 123.

  In particular, separation occurs on the side opposite to the wind load side (load load side) where compressive stress occurs, and as a result of analysis, it is found that stress exceeding the above adhesive strength acts, and stress fluctuation due to wind direction Considering the long-term durability considered, there is a possibility that separation exceeding the adhesive strength may occur in other parts of the part as well, and it is necessary to review the means for overlapping the fiber base material.

  FIG. 10 is a cross-sectional view showing a side structure of the wall structure according to the embodiment of the present invention, and is a cross-sectional view along the XY plane.

  FIG. 10A is a cross-sectional view of the flange 126. The wall structure 100 </ b> C according to the present embodiment includes a first plate 110, an outer plate 123, an inner rib 130 that is closest to the outer plate 123, and an inner layer plate 124 that faces the first plate 110 at the side. A rectangular body is provided. The wall structure 100 </ b> C has a projecting plate 125 that projects outward in the width direction X from the rectangular body.

  The inner layer plate 124 is a plate-like portion formed in a rectangular shape when viewed from the plate thickness direction. The inner layer plate 124 is arranged on the back side in the depth direction Y so as to face the first plate 110 so that the plate thickness direction coincides with the depth direction Y. The inner layer plate 124 is formed between the outer plate 123 and the outermost inner rib 130 in the width direction X.

  The overhanging plate 125 is a plate-like portion formed in a rectangular shape when viewed from the thickness direction. The projecting plate 125 is disposed on the back side in the depth direction Y such that the thickness direction coincides with the depth direction Y, and is formed so as to project from the inner layer plate 124 to the outside in the width direction X. The projecting plate 125 projects outward from the outer plate 123 in the width direction X.

  In the wall structure 100 </ b> C, continuous fiber base materials (120 a and 120 b) continuous from the second plate 120 extend so as to cover all or part of the surface of the overhanging plate 125. The continuous fiber base material continuous from the second plate 120 covers the back side (the surface on the back side in the depth direction Y) of the overhanging plate 125 (120a), and is then folded back at the end in the width direction X. It arrange | positions so that the front side (surface of the near side of the depth direction Y) of the outgoing board 125 may be covered (120b). The continuous fiber base material constituting the second plate 120 is disposed so as to overlap the surface of the overhanging plate 125 and is integrated with the overhanging plate 125.

  Furthermore, in the wall structure 100 </ b> C, the continuous fiber base material (120 c) continuous from the second plate 120 extends so as to cover all or part of the surface of the outer plate 123. The continuous fiber base material continuous from the second plate 120 is arranged so as to be bent and cover the surface of the outer plate 123 after covering the overhanging plate 125. The continuous fiber base material (120 c) constituting the second plate 120 is disposed so as to overlap the surface of the outer plate 123 and is integrated with the outer plate 123.

  FIG. 10B is a cross-sectional view of the receiving recess 127. The wall structure 100 </ b> C of the present embodiment faces the first plate 110, the outer plate 123, the inner rib 130 on the side closest to the outer plate 123, and the first plate 110 on the side opposite to the flange 126. A rectangular body composed of the inner layer plate 124 is provided.

  In the wall structure 100 </ b> C, a continuous fiber base material (120 e) continuous from the second plate 120 extends so as to cover all and part of the surface of the outer plate 123. The continuous fiber base material (120d, 120e) continuous from the second plate 120 is arranged so as to be bent and cover the surface of the outer plate 123 (120e) after covering the surface of the inner layer plate 124 (120d). . The continuous fiber bases (120d, 120e) constituting the second plate 120 are disposed so as to overlap the surfaces of the inner layer plate 124 and the outer plate 123, and are integrated with the inner layer plate 124 and the outer plate 123.

  FIG. 11: is sectional drawing which shows the upper end part structure and lower end part structure of the structure for walls which concern on embodiment of this invention, and is sectional drawing which follows a ZY surface.

  The wall structure 100 </ b> C according to the present embodiment has a bowl shape including an upper end portion of the first plate 110, a top plate 150, and an inner layer plate 124 bent downward from the top plate 150 on the upper end side (top plate portion). It has a structure. In the wall structure 100 </ b> C, a continuous fiber base material (120 f) continuous from the second plate 120 extends so as to cover all or part of the surface of the top plate 150. The continuous fiber base material (120 f) continuous from the second plate 120 is disposed so as to be bent and cover the surface of the top plate 150 after covering the surface of the inner layer plate 124. The continuous fiber base material (120 f) constituting the second plate 120 is disposed so as to overlap the surfaces of the inner layer plate 124 and the top plate 150, and is integrated with the inner layer plate 124 and the top plate 150.

  In the wall structure 100C of the present embodiment, the continuous fiber base material (120g) continuous from the second plate 120 covers all or part of the surface of the bottom plate 140 on the lower end side (bottom plate portion). It is extended. The continuous fiber base material (120 g) constituting the second plate 120 is disposed so as to overlap the surface (bottom surface) of the bottom plate 140 and is integrated with the bottom plate 140.

  The wall structure 100C of this embodiment is a type of wall structure having a height higher than that of the conventional structure, and the overall height H is about 3.5 m. The wall structure 100 includes a flange 126 in which continuous fiber base materials (120a, 120b) are laminated and integrated in the depth direction Y. Therefore, the wall structure 100 is suitable for a wall structure with high height and high stress. However, the continuous fiber base material (120a, 120b) in the flange 126 can be prevented from peeling off. In addition, the base material structure (120a-120g) as shown in FIG.10 and FIG.11 can also be employ | adopted with respect to the structure for walls of a type whose height is 1.2 m or less and is low.

  In addition, it is preferable to extend a continuous fiber base material (120a-120g) in all the corner parts (an upper end, a lower end, a side end). As shown in FIG. 12, the continuous fiber base material (120c) is preferably extended from the end of the first plate 110 to a position withdrawn by ΔL from the viewpoint of appearance after finishing like a two-dot chain line. .

  Next, the reinforcing fiber used for the wall structure 100 will be described. As FRP reinforcing fibers for forming the first plate 110, the second plate 120, the inner rib 130, the bottom plate 140, the top plate 150, the outer plate 123, the inner layer plate 124, and the overhang plate 125, for example, glass fiber, Aramid fibers, carbon fibers and the like can be used alone or in combination. By including the carbon fiber, the specific strength and the specific rigidity are improved, whereby the weight of the molded body can be further reduced. In addition, the continuous fiber substrate (120a-120g) continuous from the 2nd board 120 is a fiber substrate formed continuously from the fiber board which comprises the 2nd board 120. FIG.

  Examples of the form of the reinforcing fiber include a base material appropriately combining short fibers and mats having a fiber length of 1 to 3 mm, cloths made of continuous fibers, strands, and the like. The matrix resin used for FRP is not particularly limited. For example, thermosetting resins such as epoxy resin, unsaturated polyester resin, vinyl ester resin, polyethylene, polypropylene, nylon, ABS (acrylonitrile / butadiene / styrene). ), PEEK (poly-ether-ether-ketone), polyimide, and other thermoplastic resins can be used.

  In the molding method of molding FRP for forming the first plate 110, the second plate 120, the inner rib 130, the bottom plate 140, the top plate 150, the outer side plate 123, the inner layer plate 124, and the overhang plate 125, the matrix Resin can be used, or vacuum, blow, stamping, BMC (bulk molding compound), SMC (sheet molding compound), transfer molding, RTM (resin transfer molding), depending on the form of the reinforcing fiber It can be easily molded using various molding methods such as hand lay-up molding.

  In addition to powders (such as calcium carbonate and sand) for increasing viscosity, layered compounds (for example, mica, molybdenum disulfide, boron nitride, etc.), acicular compounds (for example, zonotlite, titanium) By adding an acid potash, carbon fiber, etc.), granular, or sheet-like compound (for example, ferrite, talc, clay, etc.), conversion to frictional heat by mutual movement of inorganic crystals or between inorganic and matrix is made, Filling the filler (filler) increases the elastic modulus and density, increases resistance to vibration, and improves damping characteristics. Thereby, if the structure 100, 100B, 100C for walls of this embodiment is used as a viaduct or train bridge girder at the time of train operation, vibration can be reduced. Further, for example, by adding aluminum hydroxide, bromine, inorganic powder or the like to the filler, the flame retardancy can be improved. It is suitable for constructing.

  As shown in FIG. 6, the wall structure 100 is arranged in the width direction X on a frame 300 provided along a railroad or the like, and the partial bottom plate 141 of the attachment portion 160 of each wall structure 100 is attached. Used by being fixed to the housing by means (bolt 310 and nut 500). Thereby, a wall can be constructed along a railway or the like.

  In the wall structure of the present invention, the first plate, the second plate, the inner rib, the bottom plate, the inclined plate, and the top plate are not limited to FRP. Any of them may be formed of a material other than the FRP. These configurations are appropriately selected according to the type and size of the load applied to each of these members.

  Further, since the surface of the wall structure 100 is formed by the first plate 110 and the second plate 120 having skin surfaces (flat surfaces), the wind pressure on the surface of the wall structure 100 is difficult to change and noise. And the visibility of the sign is improved without impeding the driver's visual field.

  The means for attaching the wall structure of the present invention is not limited to bolts and nuts. Among such various embodiments, in the case of the wall structure 100 of the embodiment, the partial bottom plate 141 in the mounting portion 160 is provided with a mounting hole 142 penetrating substantially in the height direction. . In this case, the wall structure can be obtained by passing the bolt 310 rising from the housing 300 through the mounting hole 142, placing the seat plate 400 having a through hole in the bolt 310, and fitting and tightening the nut 500. The workability of attaching the body 100 to the housing 300 is good.

  When providing an attachment hole in the partial bottom plate in the attachment part of the wall structure of the present invention, the arrangement of the attachment hole is not limited. Among such various embodiments, in the case of the wall structure 100 according to the embodiment, the attachment hole 142 is formed with respect to the neutral plane N when receiving a bending moment about an axis extending in the width direction. They are provided separately on the far side and the near side in the depth direction. In this way, it becomes easy to distribute the mounting holes 142 near the neutral plane N, and the first plate 110 or the second plate 120 receives a bending moment around the axis extending in the width direction due to wind pressure or the like. Sometimes the bending stress applied to the mounting means such as the bottom plate 140, the bolt 310, and the nut 500 is further reduced, and it is necessary to increase the strength of each part of the wall structure 100 or strengthen the mounting means such as the bolt 310 and the nut 500. In combination with the hollow structure, the wall structure 100 becomes lighter.

  The wall structure of the present invention includes an embodiment in which an inclined plate is not provided. Among such various embodiments, in the case of the wall structure 100 according to the embodiment, the depth of the first plate 110 decreases in the depth direction from the lower side in the height direction toward the lower side in the height direction. An inclined plate 111 that is inclined to the side is branched, and an end on the lower side in the height direction of the inclined plate 111 is provided integrally with an end on the higher side in the height direction of the back plate 121. ing. If it does in this way, it will become easy to do the operation | work done from diagonally upward toward the attaching part 160, and workability | operativity will improve.

  The wall structure of the present invention is not limited to any material of the first plate 110, the second plate 120, the outer plate 123, the inner rib 130, the bottom plate 140, and the top plate 150. Among the various embodiments, in the case of the wall structure 100 of the embodiment, the first plate 110, the second plate 120, the outer plate 123, the inner rib 130, the bottom plate 140, and the top plate 150 are: Both are made of FRP. If it does in this way, the weather resistance of the structure 100 for walls and corrosion resistance will improve by FRP.

  13 and 14 are views showing a wall structure according to a third embodiment of the present invention. In the wall structure 100 of the first embodiment, the plurality of inner ribs 130 are formed of plate-like members that are formed in a substantially rectangular shape when viewed from the thickness direction. On the other hand, in the wall structure 100D of the third embodiment, the plurality of inner ribs 130 are each a rib body 132 similar to the inner rib 130 of the first embodiment, and the depth direction of the rib body 132. The front side flange 133 is provided integrally with the front side, and the rear side flange 134 is provided integrally with the rear side of the rib main body 132 in the depth direction.

  The plurality of inner ribs 130 are arranged between the first plate 110 and the second plate 120 at intervals in the width direction X so that the plate thickness direction of the rib main body 132 substantially coincides with the width direction X. Has been. Each of the plurality of inner ribs 130 extends substantially in the height direction Z, the front flange 133 is provided integrally with the first plate 110, and the rear flange 134 is integrated with the second plate 120. Provided.

  The rib main body 132 is a plate-like member formed in a substantially rectangular shape when viewed from the plate thickness direction, and the plate thickness direction of the rib main body 132 is substantially in the width direction between the first plate 110 and the second plate 120. X is arranged so as to coincide with X. The front flange 133 is a plate-like member formed in a substantially rectangular shape when viewed from the plate thickness direction, and is arranged along the inner surface of the first plate 110. The rear flange 134 is a plate-like member formed in a substantially rectangular shape when viewed from the plate thickness direction, and is arranged along the inner surface of the second plate 120. The front flange 133 extends in the width direction from the rib main body 132, and the inner rib 130 is formed in a substantially U shape when viewed in the height direction.

  The front side flange 133 is integrally formed with the first plate 110 by being simultaneously molded with the first plate 110, and the back side flange 134 is provided with respect to the second plate 120. It is integrally provided by being bonded to 120. However, any flange may be provided integrally with the first plate 110 or the second plate 120, and it may be by simultaneous molding or by an adhesive. Moreover, you may use the inner rib which consists only of a plate-shaped body like 1st Embodiment instead of such an inner rib with a flange.

  Reinforcing ribs 135 are provided on the inner rib 130 of the third embodiment. The reinforcing rib 135 is formed by bending a plate-like member into a wave shape. That is, the reinforcing rib 135 is formed in a substantially rectangular shape when viewed from the width direction, and is formed in a wave shape having a substantially continuous S-shape when viewed from the depth direction. The rib main body 132 is bonded to a portion corresponding to a wave valley. The shape of the reinforcing rib is not limited by the third embodiment.

  In the third embodiment, in addition to obtaining the functions and effects obtained in the first embodiment, the inner rib 130 further includes a rib main body 132, a front flange 133, and a rear flange 134. Therefore, the bending rigidity of the inner rib 130 itself is increased. Further, since the inner rib 130 includes the reinforcing rib 135, the bending rigidity of the inner rib 130 itself is increased.

  The present invention is not limited to the above embodiment. For example, although the continuous fiber base material which comprises a 2nd board is formed so that the outer side board 123, the top board 150, and the bottom board 140 may be covered, these outer side board 123, the top board 150, and the bottom board 140 are not covered. It may be a thing. Further, only the outer plate 123 may be covered, and the top plate 150 and the bottom plate 140 may not be covered. The structure which covers only any one among the outer side board 123, the top board 150, and the bottom board 140 may be sufficient. Moreover, the structure which the continuous fiber base material which comprises a 1st board is bent by a corner part, and covers the outer side board 123, the top board 150, or the bottom board 140 may be sufficient.

  Moreover, the structure for walls in which the flange 126 and the receiving recessed part 127 are not formed may be used.

Example 1
Hereinafter, one example in the embodiment of the wall structure of the present invention will be described. In the wall structure 100 according to this embodiment, the first plate 110, the second plate 120, the inner rib 130, the bottom plate 140, the inclined plate 111, and the top plate 150 are all combined. The manufacturing method will be described.

(1) First, to form the first mold for forming the second plate 120, the first plate 110, the outer side plates 123 on both sides, the inner ribs 130, the bottom plate 140, the inclined plate 111, and the top plate 150. A second mold having a convex mold was prepared, and a gel coat of about 500 to 800 g / m ² was applied to these first mold and second mold.

  (2) Next, an unsaturation in which 20 parts of aluminum hydroxide was added while laminating a strand mat and 0/90 degree stitching glass fabric (with glass mat) as a base material to be an outer layer on the first mold. The first plate 110, the outer side plates 123 on both sides, the bottom plate 140, the inclined plate 111, and the top plate 150 were sequentially formed by impregnating the polyester resin. Next, while arranging a predetermined number of rectangular cores, a 0 / +-45 degree stitching glass fabric (with a glass mat) is laminated and impregnated between the cores, and the U-shaped inner ribs 130 are formed. Formed. At this time, the web of the U-shaped inner rib 130 forms the side plate 131 of the mounting portion 160 at the same time. When the molded product was semi-cured, the core was removed from the mold, and the reinforcing ribs 135 were mounted between the flanges of the inner ribs 130, but they were naturally bonded with an excess resin of the matrix resin formed with the ribs. A ventilation hole 180 having a diameter of 6 mm was drilled at three locations in the center of the inner rib 130 and in all of the inner rib 130.

  (3) Subsequently, 20 parts of aluminum hydroxide was added to the second mold while laminating a strand mat and a 0/90 degree stitching glass fabric (with a glass mat) as a base material serving as an outer layer. The second plate 120 was molded by impregnating with saturated polyester resin.

  (4) Then, the first mold is inverted and superimposed on the second mold on which the second plate 120 is formed, so that the second plate 120 is configured as shown in FIGS. The continuous resin base material to be arranged was integrated up to the front side of the first plate 110 and the bottom plate 140, and the molded product was cured to obtain the wall structure 100 of Example 1.

  A predetermined mounting hole 142 was formed in the partial bottom plate 141 of the mounting portion 160 of the wall structure 100, and a ventilation hole 181 having a diameter of 6 mm was drilled in the center on the back side of the inclined plate 111 of the mounting portion 160. The dimensions of the wall structure 100 according to the embodiment obtained as described above are 2.5 m in the height direction, 1 m in the width direction, and the depth of the structure on the side higher than the mounting portion 160. The direction dimension was 100 mm, the height of the inclined portion was 350 mm, the depth of the bottom plate of the mounting portion was 220 mm, and the total weight was 65 kg.

  The wall structure 100 is attached to the pedestal so that the first plate 110 and the second plate 120 are perpendicular to the pedestal provided on the floor so that the first plate 110 and the second plate 120 are perpendicular to each other. A hydraulic cylinder mounted on the wall is loaded in the horizontal direction from the direction of the second plate 120 with a load corresponding to the bending moment obtained from the distributed load acting on the half of the total height of the wall structure 100. did.

The deflection of the position of the top plate 150 at the time of loading a load corresponding to a wind load of 1.5 kN / m ² at the time of passing through the train is 12 mm. From the design deflection of 20 mm which is 1/100 of the total height of the wall structure 100 It was confirmed that it was small and had the designed rigidity.

In addition, it was confirmed that the deflection of the position of the top plate 150 at the time of applying the design load corresponding to the wind load of 3 kN / m ² was 40 mm, and it was also satisfied that it was 100 mm or less defined by the wall structure. Furthermore, although a load corresponding to a breaking strength three times as large as 3 kN / m ² of the wind load was applied, it was confirmed that the wall structure itself was not broken only by bending the mounting bolt.

  Prior to the test, when the same structure was applied to the wall structure having the same height as shown in FIG. 9A, the wall structure was simply overlapped, and 1.2 times the design load. At this point, cracks that were considered to be peeled off occurred in the second plate 120 of the overlapping portion flange 126 in the vicinity of the mounting, and when the load was continued, the peeling became noticeable at twice the design load, and the wrinkles were greatly reduced. Immediately after confirming the increase, the corners of the partial bottom plate 140 and the back plate 121 were also destroyed. When the broken wall structure was disassembled, it was found that the overlapped portion was completely peeled off, so that the second plate 120 did not contribute to the strength, and the stress was concentrated on the above portion, so that it was broken. . However, no breakage starting from the vent was observed. Through the above test, it was confirmed that the means for reviewing the base material configuration was appropriate.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to sound insulation (soundproof) walls provided on railings for railroads or roads, but also to sound insulation walls against noise at construction sites.

50 FRP soundproof wall 51 Sound insulation part 52 Stiffener 53 Mounting hole 54 Mounting part 60 FRP type soundproofing wall 61 Soundproofing panel part 62 Mounting part 63 Stiffener 64 Mounting hole 100, 100B, 100C, 100D Wall structure 110 First plate 111 Inclined Plate 112 Branch point 113 Inclined portion start point 120 Second plate 120a to 120g Continuous fiber base material 121 Back plate 122 Inclined portion 123 Outer plate 124 Inner layer plate 125 Overhang plate 126 Overlapping flange 127 Receiving recess 130 Inner rib 131 Side plate 132 Rib body 133 Front side flange flange 134 Back side rib flange 135 Reinforcement rib 140 Bottom plate 141 Partial bottom plate 142 Mounting hole 143 Outer layer 144 Inner layer 150 Top plate 160 Mounting portion 180, 181, 182 Vent hole 200 Connecting member 210 Side end 300 Body 310 Bolt 400 Seat plate 500 Nut B Effective width W Opening width W1 Width between stiffeners h Inclined part height H Total height of wall structure N Neutral surface at higher part than mounting part N1 Neutral surface at bottom plate part e Edge D D Mounting hole diameter D1 Circular hole diameter corresponding to the width of two faces in the long hole b Width of the two faces in the long hole X Width direction Y Depth direction Z Height direction

Claims (4)

A first plate disposed such that a plate thickness direction is the depth direction when the three directions orthogonal to each other are defined as a depth direction, a width direction, and a height direction;
A second plate disposed opposite to the first plate so that the thickness direction is the depth direction on the back side in the depth direction of the first plate;
Between the 1st board and the 2nd board, it arranges at intervals in the width direction so that a board thickness direction may become the width direction, each extends in the height direction, and the depth direction A plurality of inner ribs in which an end portion on the near side is integrally provided on the first plate, and an end portion on the back side in the depth direction is integrally provided on the second plate;
It arrange | positions in the lower end part of the said 1st board, the said 2nd board, and the said inner rib so that a plate | board thickness direction may become the said height direction, and the edge part of the back side of the said depth direction is a lower end of the said 2nd board And an end on the near side in the depth direction is formed integrally with the lower end of the first plate, and a portion extending in the width direction is integrated with the lower end of the inner rib. And a bottom plate formed automatically,
A portion between the pair of side plates in the bottom plate, a pair of side plates that are portions on the lower side of a pair of adjacent inner ribs among the plurality of inner ribs, and a back plate that is a portion on the lower side of the second plate And a concave mounting portion that is open to the near side in the depth direction is formed.
An inclined plate that is inclined from the lower side of the first plate toward the inner side in the depth direction is branched downward, and a lower end portion of the inclined plate is provided integrally with an upper end portion of the back plate. In a given wall structure,
The partial bottom plate is formed with a mounting hole penetrating in the height direction,
The opening width W in the concave shape of the mounting portion satisfies the following formula (1),
A height h of the inclined plate from the upper surface of the bottom plate in the height direction satisfies the following formula (2).
2D ≦ W ≦ 1.5 × (D + 2e) (1)
However, in the said Formula (1), D is the hole diameter of the said attachment hole, e is the edge length which is the length from the near end of the said depth direction in the said partial bottom plate to the center of the said attachment hole. It is.
0.15H ≦ h ≦ 0.3H (2)
However, in said Formula (2), H is the total height of the said structure for walls.   The wall structure according to claim 1, wherein the edge length e is 1.2 times or more the hole diameter D of the mounting hole. A top plate that is disposed at the upper end of the first plate such that the thickness direction is the height direction, and the end on the near side in the depth direction is formed integrally with the upper end of the first plate;
A pair of plates facing each other so that the thickness direction is the width direction, disposed at both ends in the width direction, and the end on the near side in the depth direction being formed integrally with the width direction end of the first plate And an outer plate of
The continuous fiber base material constituting the second plate extends to an outer surface of a pair of outer plates, an outer surface of a top plate, or an outer surface of the bottom plate. The structure for a wall as described. The inclined plate is formed with a first ventilation hole penetrating in the thickness direction,
The wall structure according to any one of claims 1 to 3, wherein a second ventilation hole penetrating in the plate thickness direction is formed in the inner rib.

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