JP2016191205A - Reinforcement structure of rigid guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure of a rigid guard fence capable of satisfactorily improving the proof stress of an existing rigid guard fence at a collision of a vehicle so as to bear a collision of a vehicle which has increased in size as compared to the time when the rigid guard fence is constructed, and capable of being constructed in a short period with little industrial wastes.SOLUTION: The reinforcement structure of a rigid guard fence vertically disposed along a road includes a top beam member 11 which is provided to a top part 90A of a rigid guard fence 90 extending in a direction along a road. The top beam member 11 includes: a pair of gripping parts 12B and 14B which are opposite to each other while gripping both sides of the top part 90A of the rigid guard fence 90; and a connection part 12A which is disposed above the top part 90A of the rigid guard fence 90 and connects the opposing gripping parts 12B and 14B. The top beam member 11 is attached to the rigid guard fence 90 by means of an anchor 50 embedded in the top part 90A of the rigid guard fence 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a structure for reinforcing a rigid protective fence. Here, the rigid guard fence is a guard fence that allows only deformation within elastic deformation of a main member constituting the guard fence.

  Rigid protective fences are often erected along the road to prevent the vehicle from falling on the elevated part of the road dedicated to automobiles.

  On the other hand, many automobile roads such as the Metropolitan Expressway have been repaired and reinforced, since many of them have been built for decades.

  In addition, the number of roads for automobiles that can run 25t cars, which was not assumed at the time of construction, is increasing in size compared with that at the time of construction. The proof stress is also increasing.

  As a technique that can be utilized when repairing or reinforcing a rigid protective fence, for example, there are techniques described in Patent Documents 1 and 2.

  The technique described in Patent Literature 1 is a repair and reinforcement structure for an existing wall body that is integrally provided on a floor slab, and is integrated by being adhered to both surfaces via an adhesive across the existing wall body. The existing wall is provided by integrally connecting the reinforcing plate, the connecting member that penetrates the existing wall body and connects the reinforcing plates on both sides, and the upper ends of the reinforcing plates on both sides. A reinforcement reinforcing structure for an existing wall body, characterized in that the reinforcing plate has a flat plate shape and is formed as a single plate from the upper end to the lower end. .

  The technique described in Patent Document 2 is a concrete floor slab steel girder bridge in which a reinforced concrete floor slab is supported by a steel main girder, and a side reinforcing plate fixedly stretched on the outer surface of a side edge convex portion of the reinforced concrete floor slab. And a lower side connecting reinforcing plate for connecting the side reinforcing plate and the steel main girder, wherein the lower side connecting reinforcing plate is positioned apart from the lower surface of the reinforced concrete floor slab. A reinforcing structure for a concrete slab steel girder bridge, characterized in that the main girder and the reinforced concrete slab form a closed cross section.

  However, the techniques described in Patent Documents 1 and 2 are techniques for disposing reinforcing plates on both sides of the existing wall body, and are not techniques for dealing with vehicle collisions or vehicle enlargement. With the technique described in 2, it is difficult to sufficiently improve the proof strength of the existing rigid protective fence at the time of the vehicle collision so that it can withstand the collision of the vehicle that has become larger than at the time of construction. In addition, in the techniques described in Patent Documents 1 and 2, in the attachment of the reinforcing plate, a large number of anchor bolts penetrating the existing wall body are used in multiple stages in the height direction, and the reinforcing bars arranged inside the existing wall body It is necessary to search almost all of them on site, and the construction period becomes longer and the construction cost becomes higher.

  In addition, it is also possible to remove the existing wall body and install a new wall body. In this case, it is necessary to dispose of industrial waste, and the construction period becomes longer and the construction cost increases. .

Japanese Patent No. 4735223 JP 2002-227134 A

  The present invention has been made in view of such a situation, and the strength of the existing rigid protective fence at the time of the vehicle collision is sufficient so that it can withstand the collision of the vehicle which is larger than that at the time of construction of the rigid protective fence. It is an object of the present invention to provide a rigid protective fence reinforcement structure that can be improved in a short period of time and that can be constructed in a short construction period and that hardly generates industrial waste during construction.

  This invention solves the said subject with the reinforcement structure of the following rigid protection fences.

  That is, the rigid guard fence reinforcing structure according to the present invention is a rigid guard fence reinforcing structure erected along the road, and is provided at the top of the rigid guard fence and extends in the direction along the road. The top beam member is disposed so as to sandwich both side surfaces of the top portion of the rigid protective fence, and the opposed sandwiching portions are disposed above the top portion of the rigid protective fence. And the top beam member is attached to the rigid protective fence by an anchor embedded in the top of the rigid protective fence. Structure.

  In addition, in this application, "the direction along a road" is a "direction where a road extends", and both mean the same direction.

  In addition, the “top portion of the rigid protection fence” is a portion of the upper end portion including the upper surface among the rigid protection fence portions, and the sandwiched portions of the top beam member are directly or indirectly on both sides of the portion. It is a part that can be sandwiched between. Here, “directly or indirectly sandwiching” is a concept that includes not only direct contact and sandwiching but also sandwiching, for example, a sheet material having shape followability.

  The rigid guard fences erected along the road are often erected at the transverse end of the road or at the median strip.

  In the reinforcing structure of the rigid protective fence, the top beam member includes a first beam member and a second beam member, and the first beam member includes a vertical plate-like portion and a horizontal plate-like portion. The second beam member has a vertical plate-like portion and a horizontal plate-like portion, and the sandwiched portion of the top beam member is arranged in the vertical direction of the first beam member. A plate-like portion and the plate-like portion in the up-down direction of the second beam member, and the connecting portion of the top beam member includes the plate-like portion in the horizontal direction of the first beam member and the plate-like portion of the first beam member. You may comprise so that it may have at least one part of the said plate-shaped part of the said horizontal direction of a 2nd beam member.

  Further, in the reinforcing structure of the rigid protective fence, the top beam member includes a first beam member and a second beam member, and the first beam member is one of both side surfaces of the rigid protective fence. A plate-like portion along one side surface and a plate-like portion in the horizontal direction; and the second beam member has a plate-like portion along the other side surface of both sides of the rigid protective fence and a horizontal plate-like portion. A plate-like portion, and the sandwiching portion of the top beam member includes a plate-like portion along the one side surface of the first beam member and a plate-like portion along the other side surface of the second beam member. The connecting portion of the top beam member includes at least a part of the horizontal plate-like portion of the first beam member and the horizontal plate-like portion of the second beam member. You may comprise so that it may have.

  In the reinforcing structure of the rigid protective fence, after confirming safety, the anchors may be provided in a row at the top of the rigid protective fence, and the interval between the adjacent anchors may be 500 mm or more and 1500 mm or less. .

  A long hole extending in the extending direction of the rigid guard fence may be provided in the connecting portion so as to penetrate vertically, and the anchor may be inserted through the long hole.

  The top beam member further has two rows of plate-like standing portions that are erected above the coupling portion and extend in a direction along the road, and the coupling portion is sandwiched between the opposed portions. You may comprise the reinforcement structure of the said rigid guard fence so that while connecting parts, the said 2 rows plate-like standing part may be connected.

  The two rows of plate-like erections are provided so that the planar direction of the plate-like reinforcements erected above the connecting portion is substantially orthogonal to the direction in which the two rows of plate-like erection portions extend. The rigid protective fence reinforcing structure may be configured such that the plate-shaped reinforcing portions are connected to the connecting portions and the two rows of plate-like standing portions. .

  A through hole is formed in the plate-like reinforcing portion in a direction substantially parallel to the extending direction of the two rows of plate-like standing portions, and the reinforcing structure of the rigid protective fence is configured so that the wire is inserted into the through hole. May be.

  A height adjusting member that is movable in the vertical direction is attached to the connecting portion, and the rigid guard fence reinforcing structure is configured so that the lower end of the height adjusting member can protrude below the lower end of the connecting portion. May be.

  For example, a bolt may be used as the height adjusting member.

  In the case where a ground cover is provided along the road and the rigid protective fence is provided above the ground cover, the reinforcing structure of the rigid protective fence is more likely to exert a reinforcing effect.

  It is preferable from the viewpoint of maintenance and management that the top beam member is divided in a direction along the road so that a part of the top beam member can be separated and replaced.

  The top beam member may be made of steel. Further, the top beam member may be a steel material built up from a steel plate or a section steel.

  According to the present invention, the rigid protection fence can be used at the time of the vehicle collision of the rigid protection fence by widening the share of the force acting on the existing rigid protection fence so that it can withstand the collision of the vehicle that is larger than that at the time of construction of the rigid protection fence. The proof stress can be improved sufficiently, and construction in a short construction period is possible and industrial waste is hardly generated during construction. Here, the shared width is a width that can be estimated by design as a width that receives a force acting on the rigid protective fence due to a vehicle collision, and is a converted effective width in the direction in which the road extends.

The cross-sectional view which shows the reinforcement structure of the rigid protection fence which concerns on 1st Embodiment of this invention The expanded side view which looked at the top steel material 12 in the said reinforcement structure from the extending direction of the rigid guard fence 90 Top view of the reinforcing structure seen from above The enlarged side view which looked at the height adjustment mechanism in the said reinforcement structure from the extending direction of the rigid protection fence 90 The cross-sectional view which shows the reinforcement structure of the rigid protection fence which concerns on 2nd Embodiment of this invention The cross-sectional view which shows the reinforcement structure of the rigid protection fence which concerns on 3rd Embodiment of this invention The cross-sectional view which shows the reinforcement structure of the rigid protection fence which concerns on 4th Embodiment of this invention Cross-sectional view of rigid guard fence 100 before reinforcement with numerical simulation Cross-sectional view of rigid guard fence 100 after reinforcement with numerical analysis simulation Plan view showing dimensions of reinforcing portion 82D The cross-sectional view which shows the reinforcement structure of the rigid protection fence which concerns on 5th Embodiment of this invention

  Hereinafter, with reference to drawings, the reinforcement structure of the rigid protection fence which concerns on embodiment of this invention is demonstrated in detail.

(Reinforcing structure of rigid protective fence according to the first embodiment)
FIG. 1 is a cross-sectional view (a cross-sectional view cut along a plane orthogonal to the direction in which a road extends) showing the reinforcing structure of the rigid guard fence according to the first embodiment of the present invention.

  As shown in FIG. 1, the reinforcing structure 10 of the first embodiment is provided on the top 90 </ b> A of the rigid guard fence 90.

  Further, a ground cover 92 is provided above the floor slab 94, and a rigid protective fence 90 is provided above the ground cover 92. The rigid protective fence 90 is in the transverse direction of the road bridge provided with the floor slab and the ground cover. It is a rigid guard fence provided at the end. However, the application target of the reinforcing structure 10 of the first embodiment is not limited to the rigid protection fence of the road bridge including the floor slab and the ground cover, and the rigidity that does not include the floor slab and the ground cover below. The present invention is also applicable to a protective fence or a rigid protective fence that does not have a ground cover below. Moreover, it is not necessarily limited to the rigid guard fence provided in the cross direction edge part of a road bridge, For example, it can apply also to the rigid guard fence provided in the center separation zone of the road.

  The reinforcing structure 10 of the first embodiment includes a top beam member 11, and the top beam member 11 is attached to the rigid protective fence 90 by an anchor 50 embedded in the top portion 90 </ b> A of the rigid protective fence 90. The top beam member 11 includes a top steel material 12 that is a first beam member and an upper horizontal steel material 14 that is a second beam member.

  The top steel material 12 includes a web portion 12A that is a horizontal plate-like portion, a plate-like portion that is erected in the vertical direction, a road-side flange portion 12B that is positioned on the road side, and a plate that is erected in the vertical direction. It has an anti-road side flange portion 12C which is a shape portion and is located on the opposite side of the road, and a reinforcing portion 12D. 12 A of web parts are arrange | positioned so that the upper surface of the top part 90A of the rigid protection fence 90 may be covered. The road side flange portion 12B is an elongated rectangular plate-like member, and its longitudinal direction extends in the horizontal direction (the direction in which the road extends) along the road side surface of the top portion 90A of the rigid protective fence 90, and The upright direction is erected so that the short direction is the vertical direction. The anti-road side flange portion 12C is an elongated rectangular plate-like member, located above the web portion 12A, so that its longitudinal direction extends in the direction in which the rigid protective fence 90 extends (the direction in which the road extends). And it stands up so that the transversal direction may become an up-down direction. The reinforcing portion 12D is a plate-like member, and is erected vertically between the road side flange portion 12B and the anti-road side flange portion 12C so as to be orthogonal to the road-side flange portion 12B and the anti-road side flange portion 12C. Has been. Here, the anti-road side means a side opposite to the road (a side far from the road), and the same applies to the following description.

  As shown in FIG. 2 (enlarged side view of the top steel member 12 viewed from the direction in which the rigid protective fence 90 extends), the reinforcing portion 12D is positioned above the web portion 12A and the web portion 12A of the road side flange portion 12B. It connects with the part and the non-road side flange portion 12C. For this reason, reinforcement part 12D improves the intensity | strength and rigidity of the top steel material 12 which has 12 A of web parts, the road side flange part 12B, the anti-road side flange part 12C, and the reinforcement part 12D.

  Further, as shown in FIG. 2, the reinforcing portion 12D is provided with a through hole 12E. A wire (not shown) is inserted into the through hole 12E, and the wire is inserted into the through hole 12E of the plurality of reinforcing portions 12D to prevent the top beam member 11 from falling.

  As shown in FIG. 3 (a top view of the reinforcing structure 10 as viewed from above), the web portion 12A of the top steel member 12 has a long hole 12F that is elongated in the direction in which the rigid protective fence 90 extends (the direction in which the road extends). Is provided so as to penetrate vertically. The length of the long hole 12F in the short diameter direction (direction orthogonal to the direction in which the road extends) is about twice the shaft diameter of the anchor 50, and not only the position in the road extending direction but also the thickness direction of the rigid protective fence 90. The top steel material 12 can be fixed with the anchor 50 while finely adjusting the position in the direction (perpendicular to the direction in which the road extends). The anchor 50 is inserted through the long hole 12F, and the anchor 50 fixes the web portion 12A of the top steel material 12 via the presser fitting 50A.

  Of the portion of the road side flange portion 12B of the top steel member 12, the portion below the web portion 12A is provided on both side surfaces of the top portion 90A of the rigid protection fence 90 together with the plate-like portion 14B in the vertical direction of the upper horizontal steel member 14 described later. It sandwiches and forms a sandwiching part.

  12 A of web parts of the top steel material 12 have connected the road side flange part 12B of the top steel material 12, and the plate-shaped part 14B of the up-down direction of the top horizontal steel material 14, and become a connection part.

  On the upper surface of the top steel member 12, an anti-road side flange portion 12 </ b> C is erected on the side opposite to the road (the side far from the road). The anti-road side flange portion 12C is located above the web portion 12A, and the two rows along the extending direction of the rigid protection fence 90 together with the portion of the road side flange portion 12B located above the web portion 12A. The plate-like standing portion is formed. The two rows of plate-like standing portions (the portion of the road side flange portion 12B located above the web portion 12A and the anti-road side flange portion 12C) are connected by the web portion 12A.

  The road-side flange portion 12B, the anti-road-side flange portion 12C, and the vertical plate-like portion 14B of the upper horizontal steel material 14 are connected to each other by the web portion 12A. Further, the reinforcing portion 12D is connected to the web portion 12A, the portion located above the web portion 12A of the road side flange portion 12B, and the anti-road side flange portion 12C, so that the web portion 12A, the road side flange portion 12B, The strength and rigidity of the top steel member 12 having the anti-road side flange portion 12C and the reinforcing portion 12D are improved.

  For this reason, the rigid guard fence 90 reinforced by providing the reinforcing structure 10 at the top 90A has a long shared width (converted effective width in the direction in which the road extends) that receives the collision force of the vehicle when the vehicle collides, The proof strength at the time of a vehicle collision becomes large, and it becomes possible to endure even the collision of the vehicle enlarged compared with the time of construction of the rigid protection fence 90.

  The upper horizontal steel material 14 is an elongated steel material having a mountain-shaped cross section, and is arranged so that the longitudinal direction thereof is the direction in which the rigid protective fence 90 extends (the direction in which the road extends). 14A is attached to the web portion 12A of the top steel member 12 by bolts 16A and nuts 16B. Further, as shown in FIG. 3, the through hole (long hole 12G) provided in the web portion 12A of the top steel member 12 into which the bolt 16A is inserted is long in the thickness direction of the rigid protective fence 90 (crossing direction of the road). A plate in the vertical direction of the road side flange portion 12B of the top steel member 12 and the upper horizontal steel member 14 while adjusting the mounting position of the upper horizontal steel member 14 according to the thickness of the top portion 90A of the rigid protective fence 90. The top portion 90A of the rigid protection fence 90 can be sandwiched between the shape portion 14B. In this manner, the entire reinforcing structure 10 can be attached to the top portion 90 </ b> A of the rigid protective fence 90 while attaching the upper horizontal steel material 14 to the top steel material 12.

  As a result, the road-side flange portion 12B of the top steel member 12 and the vertical plate-like portion 14B of the upper horizontal steel member 14 form a sandwiching portion that sandwiches both side surfaces of the top portion 90A of the rigid protection fence 90, and the horizontal portion of the top steel member 12 is horizontal. The portion (web portion 12A) forms a connecting portion that connects the opposing sandwiching portions (the road-side flange portion 12B of the top steel member 12 and the plate-like portion 14B in the vertical direction of the upper horizontal steel member 14).

  Therefore, in the reinforcing structure 10 of the first embodiment, the web portion 12A of the top steel material 12 covers the top portion 90A of the rigid protective fence 90, and the road side flange portion 12B of the top steel material 12 is the rigid protective fence 90. Are attached so as to extend in the horizontal direction along one side surface (the side surface on the road side) of the top portion 90 </ b> A, and the plate-like portion 14 </ b> B in the vertical direction of the upper horizontal steel material 14 is attached to the rigid protective fence 90. It is attached so that it may extend in the horizontal direction along the other side surface (side surface opposite to the road) of the side surfaces of the top portion 90A.

  In the upper horizontal steel material 14, the horizontal plate-like portion 14A and the vertical plate-like portion 14B are orthogonal to both the horizontal plate-like portion 14A and the vertical plate-like portion 14B. A reinforcing steel plate to be connected may be attached.

  The reinforcing structure 10 of the first embodiment is rigid so that the top portion 90A of the rigid protective fence 90 is sandwiched between the road side flange portion 12B of the top steel member 12 and the plate-like portion 14B of the upper horizontal steel member 14 in the vertical direction. Since the top beam member 11 is attached to the top part 90A of the protective fence 90, the number of anchors 50 to which the top beam member 11 is attached to the rigid protective fence 90 can be reduced, and the anchor 50 embedded in the top part 90A of the rigid protective fence 90 is What is necessary is just to provide in the top part 90A of the rigid protection fence 90 in 1 row, and the space | interval of the adjacent anchors 50 can be enlarged like 500 mm or more and 1500 mm or less.

  Therefore, in the reinforcing structure 10 according to the first embodiment, the labor for searching for the reinforcing bar position of the rigid protection fence 90 to install the anchor 50 can be reduced, and only the partial range of the top portion 90A of the rigid protection fence 90 can be obtained. What is necessary is just to search a reinforcing bar position, and since the number of the anchors 50 to embed is small, a construction period can be shortened and construction cost can also be reduced.

  Moreover, as shown in FIG. 3, the top steel material 12 is divided | segmented into predetermined length (for example, about 900 mm-1000 mm length) in the direction along a road, and rigidity protection is carried out using the connection steel plate 52 and the volt | bolt 52A. It is mechanically connected in the direction in which the fence 90 extends (direction along the road). The upper horizontal steel material 14 is also divided into a predetermined length (for example, a length of about 900 mm to 1000 mm) in the direction along the road. The connecting steel plate 54 and the bolt 54A are used to extend the rigid protection fence 90 (on the road). Mechanically connected in the direction along). However, as shown in FIG. 3, the connecting portion between the top steel members 12 and the connecting portion between the upper horizontal steel members 14 are not overlapped, and the portion where the top steel member 12 is divided and the upper horizontal steel member 14. It is designed not to overlap with the divided parts.

  Even if the top beam member 11 is divided in the direction in which the rigid protection fence 90 extends (the direction along the road) in this way, even if the top beam member 11 is damaged by a vehicle collision, the damaged top portion Only the beam member 11 can be easily replaced, and the recovery cost after the vehicle collision and the time required for the recovery can be reduced.

  In the reinforcing structure 10 of the first embodiment, a height adjusting mechanism as shown in FIG. 4 is provided. Specifically, a welding nut 56 is attached to the web portion 12A of the top steel member 12 by welding, and a height adjusting bolt 58 as a height adjusting member is attached to the welding nut 56 so as to be movable in the vertical direction. The lower end of the height adjusting bolt 58 can protrude below the lower surface of the web portion 12A. The amount of downward protrusion of the height adjustment bolt 58 (the amount of protrusion downward from the lower surface of the web portion 12A) can be adjusted by rotating the height adjustment bolt 58. Even if the top of the fence 90 is uneven or has a certain degree of inclination, this first implementation is achieved by adjusting the downward projecting amount of the height adjusting bolt 58 that is a height adjusting member. The form of the reinforcing structure 10 can be stably attached to the top 90A of the rigid protective fence 90.

  If safety can be confirmed, the upper horizontal steel material 14 may be attached so as to extend in the horizontal direction along the road side surface of the side surface of the top portion 90A of the rigid protective fence 90, but the road side surface collides. Since the vehicle sometimes comes into direct contact with the vehicle, the upper horizontal steel member 14 extends in the horizontal direction along the side surface opposite to the road on the side surface of the top portion 90A of the rigid protective fence 90 as in the first embodiment. It is preferable to attach so as to extend.

  In the first embodiment, the upper horizontal steel material 14 is a steel material having a mountain shape, but is not limited to a steel material having a mountain shape, and may be a steel material having a groove shape, for example. Further, in the first embodiment, the upper horizontal steel material 14 is a mountain-shaped steel material produced by building up from a steel plate, but a shape steel can also be used. The same applies to other embodiments described later.

  Further, when the top portion 90A of the rigid protective fence 90 is sandwiched between the road side flange portion 12B of the top steel material 12 and the vertical plate-like portion 14B of the upper horizontal steel material 14, the road side flange portion 12B of the top steel material 12 is used. For example, a sheet material having shape followability may be interposed between the top plate 90B and the top portion 90A of the rigid protective fence 90. For example, a sheet material having a shape following property may be interposed between the two. By interposing a sheet material or the like having shape conformability, the top beam member 11 can be more stably attached even if there is some unevenness on the side surface of the top portion 90A of the rigid protection fence 90.

  Further, when the top portion 90A of the rigid protective fence 90 is sandwiched between the road side flange portion 12B of the top steel material 12 and the vertical plate-like portion 14B of the upper horizontal steel material 14, the road side flange portion 12B of the top steel material 12 is used. May be interposed between the top plate 90B of the upper horizontal steel material 14 and the top 90A of the rigid protective fence 90. It may be interposed. By interposing the adhesive, the top beam member 11 can be stably attached even if there is some unevenness on the side surface of the top portion 90A of the rigid protection fence 90, and the top beam member 11 and the rigidity protection are protected. Integration with the fence 90 becomes stronger.

  The top beam member 11 includes a steel top steel member 12 and an upper horizontal steel member 14, but the material of the top beam member 11 is not limited to steel, and the top steel member 12 and the upper horizontal steel member 14. Instead of this, a member that is not made of steel may be used. If safety can be confirmed, for example, a member formed of concrete, high-strength plastic, FRP, or the like may be used. Moreover, you may use them in mixture and may be used with a steel member.

  Next, the operational effects of the reinforcing structure 10 of the first embodiment will be described.

  The top beam member 11 is a steel material having flange portions on the road side and the opposite side of the road, and has high rigidity. For this reason, the rigid protective fence 90 reinforced by the reinforcing structure 10 including the top beam member 11 has a long shared width (converted effective width in the direction in which the road extends) that receives the collision force of the vehicle when the vehicle collides. In addition, the yield strength at the time of a vehicle collision is increased, and it is possible to withstand even a collision of a vehicle that is larger than that at the time of construction of the rigid protective fence 90.

  Note that the steel material used for the reinforcing structure 10 of the first embodiment may be a steel material built up from a steel plate or a shaped steel. Moreover, if safety can be confirmed, materials other than steel can be used. Hereinafter, the same applies to other embodiments.

  Further, in the reinforcing structure 10 of the first embodiment, the anchors 50 embedded in the rigid protective fence 90 may be provided in a row at the top 90A of the rigid protective fence 90, and the interval between adjacent anchors 50 is The size can be increased from 500 mm to 1500 mm. Therefore, it is possible to attach the entire reinforcing structure 10 to the rigid protective fence 90 while minimizing damage to the rigid protective fence 90. Moreover, the area | region which should search the position of the reinforcing bar inside the rigid protection fence 90 can be made small, and it also becomes possible to perform construction quickly.

  Moreover, since the existing rigid protection fence 90 is utilized as it is, construction can be performed with little industrial waste.

  As described above, the application target of the reinforcing structure 10 according to the first embodiment is not limited to the rigid protection fence of the road bridge including the floor slab and the ground cover. The present invention can also be applied to a rigid protective fence that is not provided with the above, or a rigid protective fence that is not provided with a ground cover below. However, the reinforcement effect is further enhanced by the rigid protective fence provided with the ground cover below. When a vehicle collides with a rigid protective fence with a ground cover below, the vehicle first collides with the ground cover, but the vehicle is thrown upward by the impact at that time. When the vehicle collides with the reinforcing structure 10 of the first embodiment, the vehicle strongly collides with the reinforcing structure 10 attached to the top portion 90 </ b> A of the rigid protective fence 90. For this reason, it becomes easy to fully utilize the rigidity of the reinforcing structure 10 of the first embodiment.

(Reinforcing structure of rigid guard fence of second embodiment)
In the top steel member 12 which is the first beam member among the top beam members 11 of the reinforcing structure 10 according to the first embodiment, a reinforcing portion 12D is provided to further improve the strength and rigidity of the top beam member 11. However, the reinforcing portion 12D may be omitted if safety can be confirmed. FIG. 5 is a cross-sectional view showing a reinforcing structure 20 according to an embodiment (second embodiment) in which the reinforcing portion 12D is omitted from the top steel member 12 of the top beam member 11 in the reinforcing structure 10 according to the first embodiment (road). It is sectional drawing cut | disconnected by the surface orthogonal to the extending direction of). In FIG. 5, the same code | symbol is used about the structure same as the structure of the reinforcement structure 10 of 1st Embodiment, and description is abbreviate | omitted.

  As described above, the second embodiment is an embodiment in which the reinforcing portion 12D is omitted from the top steel member 12 of the top beam member 11 of the reinforcing structure 10 according to the first embodiment. In the second embodiment, The top steel member 22 of the top beam member 21 includes a web portion 12A which is a horizontal plate-like portion, a plate-like portion erected in the vertical direction and a road-side flange portion 12B which is located on the road side, and a vertical direction. It is a plate-like portion that is erected and has an anti-road side flange portion 12C that is located on the opposite side of the road.

(Reinforcing structure of rigid guard fence of third embodiment)
The second embodiment is an embodiment in which the reinforcing portion 12D is omitted from the top steel material 12 of the top beam member 11 in the reinforcing structure 10 according to the first embodiment, but if safety can be confirmed, the road side flange portion 12B The portion located above the web portion 12A and the anti-road side flange portion 12C may be further omitted. The reinforcing structure 30 according to the third embodiment includes not only the reinforcing portion 12D from the top steel member 12 of the top beam member 11 of the reinforcing structure 10 according to the first embodiment, but also the web portion 12A of the road side flange portion 12B. This is an embodiment in which the upper portion and the anti-road side flange portion 12C are further omitted.

  FIG. 6 is a cross-sectional view (a cross-sectional view cut along a plane orthogonal to the direction in which the road extends) showing the reinforcing structure of the rigid guard fence according to the third embodiment of the present invention. In FIG. 6, the same code | symbol is used about the structure same as the structure of the reinforcement structure 10 of 1st Embodiment, and description is abbreviate | omitted.

  In the third embodiment, the top steel material 32 includes a web portion 32A which is a horizontal plate-like portion, a road-side flange portion 32B which is a plate-like portion erected in the vertical direction and is located on the road side, The reinforcing portion 12D and the anti-road side flange portion 12C in the first embodiment are omitted. Moreover, in the road side flange part 32B, the site | part located above the web part 32A does not exist, but the whole road side flange part 32B is located below the web part 32A.

(Reinforcing structure of rigid protective fence of the fourth embodiment)
FIG. 7 is a cross-sectional view (cross-sectional view cut along a plane orthogonal to the direction in which the road extends) showing the reinforcing structure of the rigid guard fence according to the fourth embodiment of the present invention. In FIG. 7, the same code | symbol is used about the structure same as the structure of the reinforcement structure 10 of 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 7, the reinforcing structure 34 of the fourth embodiment includes a top beam member 35. The top beam member 35 is a member obtained by changing the top steel material 12 of the reinforcing structure 10 of the first embodiment to a top steel material 36 (H-shaped steel).

  The top steel material 36, which is an H-shaped steel, has a width in the vertical direction of the anti-road side flange portion 36C larger than the anti-road side flange portion 12C of the top steel material 12 of the reinforcing structure 10 according to the first embodiment, and Since the distance between the flange portion 36B on the road side and the flange portion 36C on the opposite road side (the width in the thickness direction of the rigid protection fence 90 of the web 36A) is increased, the rigidity is increased.

  For this reason, when the vehicle collides with the rigid protective fence 90 reinforced by the reinforcing structure 34 of the fourth embodiment, the shared width of the rigid protective fence 90 that receives the force caused by the collision (converted effective width in the direction in which the road extends) Is longer than when reinforced with the reinforcing structure 10, and has a greater resistance to vehicle collision (proof strength during vehicle collision) than when reinforced with the reinforcing structure 10.

(Numerical analysis simulation)
A numerical analysis simulation using the finite element method is performed on the rigid guard fence reinforced with the reinforcement structure 80 which is the same reinforcement structure as the reinforcement structure 34 of the fourth embodiment and the rigid guard fence before reinforcement. Confirmed.

  FIGS. 8 and 9 show cross-sectional views of the rigid protective fence 100 before and after reinforcement subjected to numerical analysis simulation, respectively. The rigid protective fence 100 includes a ground cover 102 below.

  The reinforcing structure 80 used for reinforcement includes a top beam member 81 (a top steel member 82 and an upper horizontal steel member 84) and an anchor 51. The shape of the top steel member 82 is H-shaped, the width of the web portion (thickness direction of the rigid protective fence 100) and thickness are 260 mm and 22 mm, respectively, and the width (vertical direction) and thickness of the flange portion are 200 mm and 22 mm. The upper horizontal steel member 84 is a mountain-shaped steel member, the horizontal plate-like portion width (thickness direction of the rigid protective fence 100) and the thickness are 100 mm and 22 mm, respectively, and the vertical plate-like portion width (vertical Direction) and thickness are 100 mm and 22 mm, respectively. The reinforcing portions 82D are provided at a pitch of 300 mm, the reinforcing portions 82D are made of a steel plate having a thickness of 22 mm, and the planar shape of the reinforcing portions 82D is as shown in FIG.

  The collision conditions used were the type SB described in “Standard specifications for vehicle guard fences / comment (published by the Japan Road Association in March 2004)” (25t vehicle is 65km / h, rigid guard fence wall surface) In contrast, the condition of collision at an angle of 15 degrees was used.

  The results of the numerical analysis simulation are shown in Table 1 below.

  As shown in Table 1, the converted effective width (sharing width) before reinforcement is 4.27 m, whereas the converted effective width (sharing width) after reinforcement is 5.68 m, and the converted effective width after reinforcement. Is about 1.3 times that before reinforcement, and the impact force due to vehicle collision can be shared in a wider range after reinforcement than before reinforcement. Yes. Therefore, the result of the numerical analysis simulation shows that the safety is improved by the reinforcement by the reinforcement structure 80 with respect to the collision condition of the type SB.

(Rigid protective fence that can be reinforced in the present invention)
In the rigid guard fence reinforcement structure according to the first to fourth embodiments described above, the rigid guard fences 90 and 100 to be reinforced are of the straight wall type (both sides of the fence are vertical surfaces of 90 degrees with respect to the ground). However, the rigid protective fence that can be reinforced by the present invention is not limited to the straight wall type, and the rigid protective fence whose side face is inclined with respect to the ground (for example, the side face of the fence is Even a single slope type or Florida type rigid guard fence (which is an inclined surface) can be a reinforcement target of the present invention.

  When the reinforcement structure according to the first to fourth embodiments is applied to the rigid protective fence in which the side surface of the fence is inclined with respect to the horizontal plane, the inclination is caused between the side surface of the top portion of the fence and the sandwiching portion. A gap is created. Therefore, in this case, the reinforcing structure according to the first to fourth embodiments can be applied by interposing a spacer for filling the gap between the side surface of the top portion of the rigid protective fence and the sandwiching portion. it can.

  Or you may produce the member which provided the clamping part which suits the inclination with respect to the horizontal surface of the side surface of a rigid protection fence, and may use it for a reinforcement structure. FIG. 11 is a diagram showing an example thereof, and shows a reinforcing structure 40 (the reinforcing structure of the rigid protective fence of the fifth embodiment) in which the top beam member 41 is provided on the top 96A of the single slope type rigid protective fence 96. FIG.

  Similar to the first embodiment, the top beam member 41 includes two beam members (a top steel member 42 and an upper horizontal steel member 44). The road side flange portion 42B of the top steel member 42 and the upper horizontal steel member 44 The plate-like portion 44B is produced in accordance with the inclination of the side surface of the top portion 96A of the rigid protective fence 96.

10, 20, 30, 34, 40, 80 ... Reinforcement structure 11, 21, 31, 35, 41, 81 ... Top beam member 12, 22, 32, 36, 42, 82 ... Top steel member 12A, 32A, 36A ... Web Part 12B, 32B, 36B, 42B ... Road side flange part 12C, 36C ... Anti-road side flange part 12D, 36D, 82D ... Reinforcement part 12E ... Through hole 12F, 12G ... Long hole 14, 44, 84 ... Upper horizontal steel material 14A ... Horizontal plate-like portion 14B ... Vertical plate-like portion 16A, 52A, 54A ... Bolt 16B ... Nut 44B ... Plate-like portion 50,51 ... Anchor 50A ... Presser fitting 52,54 ... Connected steel plate 56 ... Welding nut 58 ... Height adjustment bolts 90, 96, 100 ... Rigid guard fences 90A, 96A ... Top 92, 102 ... Ground cover 94 ... Floor slab

Claims (13)

A rigid guard fence reinforcement structure erected along a road, comprising a top beam member provided at the top of the rigid guard fence and extending in a direction along the road;
The top beam member is
Sandwiching portions facing each other so as to sandwich both side surfaces of the top of the rigid protective fence; and
A connecting portion that is disposed above the top of the rigid protective fence and connects the opposing sandwiching portions;
Have
The reinforcing structure of the rigid protective fence is characterized in that the top beam member is attached to the rigid protective fence by an anchor embedded in the top of the rigid protective fence. The top beam member includes a first beam member and a second beam member, and the first beam member has a vertical plate-like portion and a horizontal plate-like portion, and the second beam member The beam member has a vertical plate-like portion and a horizontal plate-like portion,
The sandwiching portion of the top beam member includes the vertical plate-like portion of the first beam member and the vertical plate-like portion of the second beam member,
The connecting portion of the top beam member includes at least a part of the horizontal plate-like portion of the first beam member and the horizontal plate-like portion of the second beam member. The reinforcement structure of the rigid protection fence of Claim 1 characterized by the above-mentioned. The top beam member includes a first beam member and a second beam member, and the first beam member includes a plate-like portion and a horizontal direction along one side surface of both side surfaces of the rigid protective fence. In addition, the second beam member has a plate-like portion and a horizontal plate-like portion along the other side surface of the both sides of the rigid guard fence,
The sandwiched portion of the top beam member has a plate-like portion along the one side surface of the first beam member and a plate-like portion along the other side surface of the second beam member,
The connecting portion of the top beam member includes at least a part of the horizontal plate-like portion of the first beam member and the horizontal plate-like portion of the second beam member. The reinforcement structure of the rigid protection fence of Claim 1 characterized by the above-mentioned.   The said anchor is provided in the top part of the said rigid guard fence, and the space | interval of the said adjacent anchors is 500 mm or more and 1500 mm or less, The Claim 1 characterized by the above-mentioned. Reinforced structure of rigid protective fence.   A long hole extending in a direction in which the rigid guard fence extends is provided in the connecting portion so as to penetrate vertically, and the anchor is inserted through the long hole. Item 5. A structure for reinforcing a rigid protective fence according to any one of Items 1 to 4.   The top beam member further includes two rows of plate-like standing portions that are erected above the coupling portion and extend in a direction along the road, and the coupling portion is sandwiched between the opposed portions. The rigid protection fence reinforcement structure according to any one of claims 1 to 5, wherein the two rows of plate-like standing portions are connected to each other, and the two rows of plate-like standing portions are connected to each other.   The two rows of plate-like erections are provided so that the planar direction of the plate-like reinforcements erected above the connecting portion is substantially orthogonal to the direction in which the two rows of plate-like erection portions extend. The rigid protective fence according to claim 6, further comprising between the portions, wherein the plate-like reinforcing portion is connected to the connecting portion and the two rows of plate-like standing portions. Reinforced structure.   The plate-like reinforcing portion is provided with a through hole in a direction substantially parallel to the extending direction of the two rows of plate-like standing portions, and a wire is inserted into the through hole. The reinforcing structure of the rigid protective fence according to claim 7.   The height adjustment member which can move to the up-down direction is attached to the said connection part, The lower end of this height adjustment member can protrude below the lower end of the said connection part. The reinforcement structure of the rigid protection fence in any one of -8.   The structure for reinforcing a rigid protective fence according to claim 9, wherein the height adjusting member is a bolt. A ground cover is provided along the road,
The reinforcing structure for a rigid protective fence according to any one of claims 1 to 10, wherein the rigid protective fence is provided above the ground cover.   The reinforcing structure for a rigid protective fence according to any one of claims 1 to 11, wherein the top beam member is divided in a direction along a road and part of the top beam member can be separated and replaced.   The reinforcing structure for a rigid protective fence according to any one of claims 1 to 12, wherein the top beam member is made of steel.

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