JP2012154163A - Protective fence support for bridge and support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective fence support for a bridge and a support, capable of sufficiently securing the installation distance of at least two anchor bolts.SOLUTION: The protective fence support for the bridge includes: a first flange 7 erected on a plate 3; a second flange 8 erected on the plate 3 roughly in parallel with the first flange 7; a web 9 connecting the first flange 7 and the second flange 8, and a space part 16 provided in an area corresponding to at least hole parts 17 and 17A between the plate 3 and the web 9, and constituted such that an anchor bolt 4 can pass through.

Description

  The present invention relates to a guard fence post for a bridge and a post. Specifically, for example, the present invention relates to a bridge protection fence post and a support post in which an anchor bolt can be installed without hitting a reinforcing bar embedded in existing underground concrete.

  Guard fences for bridges are required to absorb the collision energy and prevent the struts from breaking in order to ensure the safety of passengers and vehicles and to prevent the vehicle body from jumping out of the roadway even if an automobile collides accidentally. ing.

  Here, as shown in FIG. 11, for example, a conventional bridge guard fence is provided with a ground concrete 101 for standing a bridge guard fence column 105 on the road shoulder of the roadway. Reinforcing bar (not shown) is arranged, and the ground concrete 101 is formed in a state where the anchor bolt 103 is arranged at a position where it does not contact the reinforcing bar.

  In the case of constructing such a new underground concrete 101, the anchor bolt 103 is disposed in accordance with an anchor bolt insertion hole (not shown) penetrating the plate 106 of the bridge guard fence post 105. .

  However, it is necessary to replace the protective fence for bridges due to aging or damage caused by exposure to wind and rain. In the replacement work of the bridge protection fence at this time, an existing excavator or the like is used to destroy the existing ground cover concrete and the bridge protection fence, to construct new ground concrete, and to attach the bridge protection fence.

  However, the replacement work of the protective fences for bridges requires a long construction period due to the collapse of existing underground concrete and the construction of new underground concrete. Problems arise that must be done.

  In addition, the current situation is that it is incurred in the construction cost to demolish the ground-covering concrete and replace the ground-covering concrete in order to replace the protective fence for the bridge.

  Therefore, replacement work for installing a new bridge protection fence after removing the bridge protection fence on the existing concrete has been proposed. In this replacement work, after dismantling the bridge guard fence, the boundary line between the bridge guard fence and the top surface of the cover concrete is cut with a gas burner, etc. With the part left in place, mortar and the like are poured into the remaining hole and repaired to the same surface as the top surface of the ground-covering concrete, and then a new bridge guard fence is installed.

  In this new work for installing the guard fence for bridges, as shown in FIG. 12, since the reinforcing bars 104 are embedded vertically and horizontally in the ground-covered concrete 101, anchor bolt holes are provided at positions where they do not contact the reinforcing bars 104. (Not shown) needs to be drilled.

  On the other hand, the positions of the four anchor bolt insertion holes 107 penetrating the plate plate 106 of the guard fence for the bridge are determined in advance, and anchor bolt holes corresponding to these anchor bolt insertion holes 107 (see FIG. (Not shown) is drilled at a position where it does not contact the reinforcing bar 104.

  For this reason, in order to embed the anchor bolt 103, the position of the reinforcing bar 104 is confirmed by an ultrasonic device or the like, and the anchor bolt hole corresponding to all the anchor bolt insertion holes 107 must be set so as not to hit the reinforcing bar 104. This is a very complicated task.

As a bridge guard fence post for the purpose of solving such a problem, for example, one described in Patent Document 1 is known.
Specifically, in the bridge fence guard described in Patent Document 1, as shown in FIG. 13, the anchor bolt insertion hole 107 formed in the plate 106 extends along the longitudinal direction of the ground concrete 101. At least one side of the long hole opened on the left-right side is formed with an inclination angle with respect to the longitudinal direction of the cover concrete 101.

  Thus, the anchor bolt 103 does not come into contact with the reinforcing bar 104 embedded in the ground concrete 101 because the anchor bolt insertion hole 107 has a long hole shape along the longitudinal direction of the ground concrete 101. Thus, it is possible to move in any direction.

JP 2010-1730 A

  However, in the guard fence post for bridge of Patent Document 1, the anchor bolt insertion hole 107 is arranged on the plate 106 other than the flange 110 and the web 111, and the anchor bolt insertion hole is avoided by avoiding the flange 110 and the web 111. Due to the arrangement of the hole 107, the size of the anchor bolt insertion hole 107 is limited. Therefore, the distance that can be moved for adjustment of the anchor bolt is short, and there are cases where it is not possible to sufficiently cope with embedding the anchor bolt by avoiding the reinforcing bar.

  Although it is conceivable to increase the anchor bolt insertion hole 107 in order to secure a movable distance for adjustment of the anchor bolt, it is possible to simply increase the size of the anchor bolt insertion hole 107. However, since the plate width increases, the weight of the guard fence post for the bridge itself increases, and the installation work on the overlying concrete becomes complicated. Therefore, it is difficult to say that such a measure is necessarily appropriate.

  The present invention was devised in view of the above points, and an object thereof is to provide a guard fence post and a post for a bridge that can realize a sufficient installation distance of anchor bolts. It is.

  In order to achieve the above object, the bridge guard fence post according to the present invention is fixed on the bridge concrete with at least four anchor bolts, and each of the at least two anchor bolts is placed at an arbitrary position. A plate having two holes which can be arranged, a first flange standing on the plate, and a second flange standing on the plate substantially parallel to the first flange And a web connecting the first flange and the second flange, and at least an area corresponding to the hole between the plate and the web, and attached to the anchor bolt or the anchor bolt And a space portion configured to allow the fastening member to pass therethrough.

  For example, when installing guard fence posts for bridges on existing underground concrete due to replacement work etc., arrange anchor bolts so that the anchor bolts do not come into contact with reinforcing bars arranged vertically and horizontally in the underground concrete A decision must be made.

  Here, the plate in which the holes that can be arranged at arbitrary positions of at least two anchor bolts are provided at two positions can sufficiently secure the distance in the arbitrary direction of the anchor bolts. It is possible to determine the arrangement of the two anchor bolts at a position that does not come into contact with the reinforcing bars arranged in the ground concrete in the part.

  Further, a fastening member attached to the anchor bolt or the anchor bolt is provided in a region corresponding to at least the hole between the web connecting the first flange and the second flange, and the plate and the web. By providing the space portion configured to be able to pass therethrough, the hole portion is not divided by the web, and the positioning of the anchor bolt in the hole portion can be performed without any trouble.

  In addition, the hole where each of the at least two anchor bolts can be arranged at an arbitrary position means that three or four anchor bolts are used as long as they do not come into contact with the reinforcing bars arranged in the underground concrete. It means that it may be arranged in the hole.

  In addition, since at least one of the holes is formed along the longitudinal direction of the ground-covering concrete, the hole 2 does not come into contact with the reinforcing bars arranged substantially perpendicular to the longitudinal direction of the ground-covering concrete. It is possible to determine the arrangement of the anchor bolts.

  Note that at least one of the holes is formed along the longitudinal direction of the ground-covered concrete, even if the two holes provided in the plate are formed along the longitudinal direction of the ground-covered concrete. That means it doesn't matter.

  In addition, at least one of the holes is formed at an inclination angle with respect to the longitudinal direction of the ground-covering concrete, so that two holes are not in contact with the reinforcing bars arranged along the longitudinal direction of the ground-covering concrete. It becomes possible to determine the arrangement of the anchor bolts.

  Note that at least one of the holes is formed with an inclination angle with respect to the longitudinal direction of the ground-covering concrete, that two holes provided in the plate are formed with an inclination angle with respect to the longitudinal direction of the ground-covering concrete. It means that it is OK.

  Further, by providing a reinforcing plate fixed on the plate so as to face the second flange so that the second flange is sandwiched, the plate on which the second flange is erected on the opposite side of the roadway of the underground concrete is projected. When installed, for example, when a load on the opposite side of the roadway is applied to the bridge guard fence post due to a collision by a vehicle, the plate bends, and it is possible to prevent damage to the ground-covering concrete.

  In addition, the reinforcing plate has a predetermined length and is bent at a substantially right angle along the longitudinal direction thereof, so that it can be easily and firmly fixed on the plate by welding or the like.

  In addition, the reinforcing plate has a predetermined length, and both end portions along the longitudinal direction thereof are bent at a substantially right angle so that it can be easily fixed on the plate by welding or the like, and both end portions of the reinforcing plate By standing on the plate, the strength of the plate can be remarkably improved.

  In order to achieve the above object, the bridge guard fence post according to the present invention is fixed on the bridge concrete with at least four anchor bolts, and each anchor bolt can be arranged at an arbitrary position. A plate provided with three holes, a first flange erected on the plate, and a second flange erected on the plate substantially parallel to the first flange; Corresponding to the web connecting the first flange and the second flange, and the one hole formed at an inclination angle with respect to the longitudinal direction of the ground concrete between the plate and the web. And a space part configured to allow the anchor bolt or a fastening member attached to the anchor bolt to pass therethrough.

  Here, by providing two holes on the plate at arbitrary positions of the two anchor bolts, a sufficient distance in the arbitrary direction of the anchor bolts can be secured. It is possible to determine the arrangement of the two anchor bolts at a position that does not come into contact with the reinforcing bars arranged in the ground concrete in the part.

  And a web connecting the first flange and the second flange, and at least a region corresponding to a hole formed at an inclination angle with respect to the longitudinal direction of the cover concrete between the plate and the web. By positioning the anchor bolt or the space portion configured to allow the fastening member attached to the anchor bolt to pass therethrough, positioning of the anchor bolt in the hole portion is performed without any trouble without dividing the hole portion by the web. It becomes possible.

  In order to achieve the above object, the column according to the present invention is fixed with at least four anchor bolts, and there are two holes where each of the at least two anchor bolts can be arranged at an arbitrary position. A provided plate, a first flange erected on the plate, a second flange erected on the plate substantially parallel to the first flange, the first flange, The anchor bolt or the fastening member attached to the anchor bolt can pass through the web that connects the second flange and the web that is provided at least in the region corresponding to the hole between the plate and the web. And a configured space portion.

  Here, when utilizing existing ground-covered concrete for the replacement of the pillars, the anchor bolts are formed by plates provided with holes at two positions which can be arranged at arbitrary positions of at least two anchor bolts. A sufficient distance in an arbitrary direction can be ensured, and it is possible to determine the arrangement of the two anchor bolts at a position that does not come into contact with the reinforcing bar arranged in the cover concrete in the hole of the plate. .

  Furthermore, a web connecting the first flange and the second flange, and an anchor bolt or a fastening member attached to the anchor bolt are provided in a region corresponding to at least the hole between the plate and the web. By providing the space portion configured to be able to pass therethrough, the hole portion is not divided by the web, and the positioning of the anchor bolt in the hole portion can be performed without any trouble.

  In addition, the hole where each of the at least two anchor bolts can be arranged at an arbitrary position means that three or four anchor bolts are used as long as they do not come into contact with the reinforcing bars arranged in the underground concrete. It means that it may be arranged in the hole.

  In order to achieve the above object, the column according to the present invention is fixed with at least four anchor bolts, and is provided with three holes each having a hole that can be placed at an arbitrary position. A first flange erected on the plate, a second flange erected on the plate substantially parallel to the first flange, the first flange and the second flange And the anchor bolt, provided in a region corresponding to the one hole formed at an inclination angle with respect to the longitudinal direction of the ground concrete between the plate and the web, Or the space part comprised so that the member for fastening attached to the anchor bolt could pass was provided.

  Here, when existing ground-covered concrete is used to replace the pillars, the holes arranged at two arbitrary positions of the two anchor bolts are provided in the plate at two locations, so that the anchor bolt A sufficient distance in an arbitrary direction can be ensured, and it is possible to determine the arrangement of the two anchor bolts at a position that does not come into contact with the reinforcing bar arranged in the cover concrete in the hole of the plate. .

  And a web connecting the first flange and the second flange, and at least a region corresponding to a hole formed at an inclination angle with respect to the longitudinal direction of the cover concrete between the plate and the web. By positioning the anchor bolt or the space portion configured to allow the fastening member attached to the anchor bolt to pass therethrough, positioning of the anchor bolt in the hole portion is performed without any trouble without dividing the hole portion by the web. It becomes possible.

  According to the guard fence post and the support post for the bridge of the present invention, it is possible to sufficiently secure the installation distance of at least two anchor bolts, and to fix the anchor bolts without contacting the reinforcing bars arranged in the ground concrete. The installation position can be adjusted in any direction.

It is a three-dimensional schematic diagram for demonstrating an example of the guard fence support | pillar for bridges to which this invention is applied. It is a side surface schematic diagram for demonstrating an example of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating an example of the plate of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating the other example of the plate of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating the other example of the plate of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating the other example of the plate of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating an example of the reinforcement board attached to the plate of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating the attachment state to the underground concrete of the guard fence support | pillar for bridges in FIG. The solid schematic diagram which shows the other example of the guard fence support | pillar for bridges to which this invention is applied is shown. It is a schematic diagram for demonstrating the attachment state of the plate of the other example of the guard fence support | pillar for bridges to which this invention is applied. It is a schematic diagram for demonstrating an example of the attachment of the protection fence support | pillar for conventional bridges. It is a schematic diagram for demonstrating the embedding state of the reinforcing bar in ground-cover concrete. It is a schematic diagram for demonstrating an example of the form of the anchor bolt insertion oblong hole of the plate of the conventional fence guard fence for bridges.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.

<First Embodiment>
1 is a three-dimensional schematic diagram for explaining an example of a bridge guard fence post to which the present invention is applied. FIG. 2 is a side schematic diagram for explaining an example of a bridge guard fence post to which the present invention is applied. These are the schematic diagrams for demonstrating an example of the plate of the guard fence post for bridges to which this invention is applied.

  The bridge guard fence post 1 shown here is made of ductile cast iron, steel, aluminum, stainless steel, or the like.

  The guard fence post 1 for the bridge includes a plate 3, first and second flanges 7 and 8 erected so as to be parallel to each other on the plate 3, and the first flange 7 and the second flange 8. And a web 9 connecting two flanges 8.

  Here, the plate 3 is fastened by a fastening member 20 comprising four anchor bolts 4, nuts, washers and the like, the base portion of which is embedded in the ground-covering concrete 2 and the upper portion of the plate 3 projects from the ground-covering concrete 2. It is fixed.

  Further, the first flange 7 rises vertically in a state where the lower end thereof is provided with a predetermined width on the front side of the front end (the side of the roadway) of the plate 3, and the rear side of the plate 3 (opposite of the roadway) in the middle of the lower part. Side) is bent at a predetermined angle, and is raised upright again.

  Next, attachment receiving portions 12, 12 </ b> A, and 12 </ b> B for receiving the upper rail 11, the middle rail 11 </ b> A, and the lower rail 11 </ b> B from the upper end of the front surface of the first flange 7 are provided. The attachment receiving portions 12, 12A, 12B are formed in an arc shape along the outer peripheral surfaces of the rails 11, 11A, 11B.

  Moreover, the bolt insertion hole 13 is penetrated in the approximate center part of the attachment receiving parts 12, 12A, 12B. Further, a fastening screw hole 14 is drilled in the upper rail 11, the middle rail 11A, and the lower rail 11B.

  The rails 11, 11A, 11B are fitted to the attachment receiving portions 12, 12A, 12B in a state where the sleeve 10 is included.

  Here, the bolt insertion holes 13 of the attachment receiving portions 12, 12 </ b> A, 12 </ b> B, the fastening screw holes 14 of the rail 11, the rail 11 </ b> A and the rail 11 </ b> B, and the screw holes (not shown) drilled in the sleeve 10 are combined. And is configured to be screwed by the fastening bolt 15.

  The second flange 8 is joined to the rear end of the web 9 by welding or the like. The width of the second flange 8 is set to be equal to or less than the distance between the mounting receiving portions 12, 12 </ b> A, and 12 </ b> B penetrating the first flange 7 and the bolt insertion hole 13. As a result, the rails 11, 11A, and 11B can be fastened by fastening bolts from the rear of the second flange 8 with an electric screwdriver or the like.

  Further, the web 9 is joined by welding or the like along the central vertical direction of the back surfaces of the first flange 7 and the second flange 8, and the anchor bolt 4 or the fastening member 20 can pass through substantially the center of the lower end thereof. A space 16 having a region is formed.

  Here, as shown in FIG. 3, the plate 3 has a front end width of 150 to 160 mm and a depth of 205 to 220 mm, and each of at least two anchor bolts can be arranged in any direction. Two holes 17 and 17A are provided through the hole. In addition, the total length of these hole parts 17 and 17A is about 100-120 mm, and the width length is 26 mm.

  Here, the one hole 17 is provided between the first flange 7 and the front end of the plate 3 along the longitudinal direction of the ground-covering concrete 2.

  The other hole 17A is provided in a space 16 opened between the web 9 and the plate 3 so that the opening area of the hole 17A faces. Further, the web 9 is formed in an arc shape with the space portion 16 as a center and toward the left and right sides and the first flange 7 side.

  Next, FIG. 4 (FIG. 4 (A), (B), (C), (D) shows a schematic diagram for explaining another form of the plate in FIG. 3) is a bridge to which the present invention is applied. It is a schematic diagram for demonstrating the other example of the plate of the protection fence support | pillar.

  Here, as shown in FIG. 4A, a hole 17 is provided between the front end of the plate 3 and the first flange 7 along the longitudinal direction of the ground concrete 2. Further, the hole 17A is penetrated through the space 16 at the lower end of the web 9 so that the opening area faces the hole 9A, and the hole is formed along the left and right sides of the space 16 along the longitudinal direction of the cover concrete 2. The portion 17A is provided through the plate 3.

  As shown in FIG. 4B, a hole 17 having an arc shape toward the front end of the plate 3 is provided between the front end of the plate 3 and the first flange 7. Further, the space 9 at the lower end of the web 9 is penetrated with the opening area of the hole 17A facing, and the arc shape is formed toward the left and right sides of the space 16 and toward the rear end of the plate 3. The formed hole portion 17 </ b> A penetrates the plate 3.

  Further, as shown in FIG. 4C, a hole 17 having an arc shape toward the front end of the plate 3 is provided between the front end of the plate 3 and the first flange 7. Further, the space 9 at the lower end of the web 9 is penetrated with the opening area of the hole 17 </ b> A facing, and the hole is formed along the left and right sides of the space 16 and along the longitudinal direction of the cover concrete 2. The portion 17A is provided through the plate 3.

  Further, as shown in FIG. 4 (D), the plate 3 is disposed along the longitudinal direction of the cover concrete 2 between the front end of the plate 3 and the front flange 7, and both ends thereof are on the front flange 7 side. A hole 17 having a shape bent substantially at a right angle is provided. Furthermore, it penetrates in the state where the opening area of the hole 17A faces the space 16 at the lower end of the web 9, and along the left and right sides of the space 16 along the longitudinal direction of the cover concrete 2. The plate 3 is provided with holes 17 </ b> A which are arranged and whose both ends are bent toward the front end of the plate 3.

  Next, FIG. 5 (FIG. 5A) is a schematic diagram showing an example in which a hole is arranged between the rear end of the plate and the rear flange, and FIG. 5B shows the rear end of the plate and the rear flange. (The schematic diagram of the other example at the time of arrange | positioning a hole between these is shown.) Is a schematic diagram for demonstrating the other example of the hole of the plate of the guard fence support | pillar for bridges to which this invention is applied. .

  Here, as shown in FIG. 5A, a hole 17 is provided between the rear end of the plate 3 and the rear flange 8 along the longitudinal direction of the ground concrete 2. Furthermore, it penetrates in the state where the opening area of the hole 17A faces the space 16 at the lower end of the web 9, and along the left and right sides of the space 16 along the longitudinal direction of the cover concrete 2. A hole 17 </ b> A is formed through the plate 3.

  Further, as shown in FIG. 5B, a hole 17 having an arc shape toward the rear end of the plate 3 is provided between the rear end of the plate 3 and the rear flange 8. Further, the space 9 at the lower end of the web 9 is penetrated with the opening area of the hole 17 </ b> A facing, and the hole is formed along the left and right sides of the space 16 and along the longitudinal direction of the cover concrete 2. The portion 17A is provided through the plate 3.

  FIG. 6 is a schematic view for explaining an example in which two hole portions of the plate of the bridge protection fence post to which the present invention is applied are arranged between the front and rear flanges.

  Here, a front flange 7 is disposed at the front end of the plate 3, a rear flange 8 is disposed at the rear end of the plate 3, and a web 9 is provided between the front flange 7 and the rear flange 8. .

  Two spaces 16 and 16 are formed at a predetermined interval between the lower end of the web 9 and the plate 3, and openings 17 A and 17 A are opened in the respective spaces 16 at the lower end of the web 9. It penetrates with the area facing. Further, holes 17 </ b> A and 17 </ b> A are formed through the plate 3 along the left and right sides of the space portions 16 and 16 and along the longitudinal direction of the ground-covering concrete 2.

  In addition, although the space part explained in full detail in a present Example shows the state where a part of web was notched so that the lower end of a web might be connected with a hole, it is not necessarily necessary to notch a part. For example, the web may be installed in a state where the upper surface of the plate and the lower end of the web are separated so as to have a space through which a fastening member such as an anchor bolt, a nut, or a washer can pass. Absent.

  In the guard fence post for bridge to which the present invention is applied, two reinforcing bars 19 are embedded along the longitudinal direction of the roadway side A and the opposite side B of the roadway concrete as shown in FIG. Reinforcing bars 19A perpendicular to the reinforcing bars 19 are embedded at regular intervals.

  Here, the plate 3 is placed on the top surface of the ground concrete 2 in a state where the hole 17 penetrating in parallel with the front end of the plate 3 is shifted from the reinforcing bar 19 on the roadway side A of the ground concrete 2. Then, the arrangement of the two anchor bolts 4 is determined in the hole 17 so as not to overlap the reinforcing bar 19A.

  In this case, a part of the hole portion 17A that is formed in an arc shape toward the left and right sides of the space portion 16 formed between the plate 3 and the lower end of the web 9 and toward the first flange 7 side is as follows. It overlaps with the reinforcing bar 19 on the opposite side B of the roadway of the ground concrete 2.

  However, since the hole portion 17A has an arc shape, the arrangement of the two anchor bolts 4 is determined in a state where the position of the anchor bolt 4 is shifted into the hole portion 17A that does not overlap with the reinforcing bar 19 on the opposite side B. I do.

  Further, as shown in FIG. 4 (A), the holes 17, 17A penetrating along the longitudinal direction of the cover concrete 2 are the reinforcing bars 19 on the roadway side A of the cover concrete 2 and the opposite side B of the roadway. The plate 3 is placed on the upper surface of the ground concrete 2 so as not to overlap with the reinforcing bar 19. Then, the arrangement of the two anchor bolts in a state where the anchor bolts 4 are shifted in the holes 17 and 17A so as not to overlap the reinforcing bars 19A is determined.

FIG. 4B shows a case in which a part of the holes 17 and 17A formed in an arc shape overlaps the reinforcing bar 19 on the roadway side A of the ground covering concrete 2 and the reinforcing bar 19 on the opposite side B of the roadway. .
In this case, the anchor bolt 4 is positioned so that the reinforcing bar 19 on the roadway side A of the cover concrete 2 does not overlap the reinforcing bar 19 and the reinforcing bar 19A on the roadway side and the opposite side B of the roadway in the holes 17 and 17A. The arrangement of the two anchor bolts in a state where they are shifted is determined.

FIG. 4C shows a case where a part of the hole 17 formed in the circular arc shape overlaps the reinforcing bar 19 on the roadway side A of the ground covering concrete 2.
In this case, the anchor bolt 4 is shifted to a position where the reinforcing bar 19 on the roadway side A of the cover concrete 2 does not overlap in the hole 17 and does not overlap the reinforcing bar 19A in the holes 17 and 17A. The arrangement of the two anchor bolts is determined.

Further, in FIG. 4D, the holes 17 and 17A penetrating along the longitudinal direction of the cover concrete 2 are the reinforcing bars 19 on the roadway side A of the cover concrete 2 and the reinforcing bars 19 on the opposite side B of the roadway. When it overlaps with.
In this case, the anchor bolts 4 are shifted to both ends of the holes 17 and 17A where the reinforcing bar 19 on the roadway side A of the cover concrete 2 and the reinforcing bar 19 on the opposite side B of the roadway do not overlap in the holes 17 and 17A. Determine the position of the two anchor bolts in the state.

  Next, as shown in FIG. 5 (A), the holes 17 and 17A penetrating along the longitudinal direction of the cover concrete 2 are the reinforcing bars 19 on the roadway side A of the cover concrete 2 and the opposite side of the roadway. The plate 3 is placed on the upper surface of the ground concrete 2 in a state where it does not overlap with the B rebar 19. Then, the arrangement of the two anchor bolts in a state in which the anchor bolt 4 is shifted in the holes 17 and 17A so as not to overlap the reinforcing bar 19A is performed.

5B, a part of the hole 17 formed in an arc shape between the rear end of the plate 3 and the rear flange 8 overlaps the reinforcing bar 19 on the roadway side A of the ground covering concrete 2. Indicates.
In this case, the anchor bolt 4 is positioned so that the reinforcing bar 19 on the opposite side B of the roadway of the cover concrete 2 does not overlap in the hole 17 and does not overlap the reinforcing bar 19A in the holes 17 and 17A. The arrangement of the two anchor bolts in a state where they are shifted is determined.

  Further, as shown in FIG. 6, the holes 17 and 17 </ b> A that penetrate the plate 3 between the first flange 7 and the second flange 8 along the longitudinal direction of the ground concrete 2 are ground concrete 2. The plate 3 is placed on the top surface of the ground concrete 2 so as not to overlap the reinforcing bar 19 on the roadway side A and the reinforcing bar 19 on the opposite side B of the roadway. Then, the arrangement of the two anchor bolts in a state in which the anchor bolt 4 is shifted in the holes 17 and 17A so as not to overlap the reinforcing bar 19A is performed.

  In the present embodiment, two anchor bolts are arranged at arbitrary positions in the hole, but it is not always necessary to arrange the two anchor bolts, and three or more anchors are arranged in one hole. You may be the structure which arrange | positions a volt | bolt.

  In the guard fence post for a bridge according to the present invention having the above-described configuration, the anchor bolt without shifting the position of the guard fence post for the bridge with respect to the reinforcing bars arranged vertically and horizontally in the cover concrete on the upper surface of the existing cover concrete. Can be determined.

  In addition, since at least two anchor bolts can be arranged in the hole, it is necessary to ensure a sufficient distance for moving at least two anchor bolts in any direction without changing the size of the plate. It becomes possible to determine the arrangement of the anchor bolts.

  In addition, by providing a space facing the opening area of the hole between the plate and the lower end of the web, the anchor bolt position can be located in the vicinity of the web or in the space, ensuring a sufficient area for anchor bolt placement. It becomes possible to do.

  Here, when four holes with a length of about 75 mm are arranged in the plate as guard fence posts for bridges to be installed on the existing underground concrete, the plate has a width of 250 mm on the front end side and its depth length. Becomes 205-220 mm. Therefore, the plate is extremely larger than the conventional plate in which four round holes are arranged.

Thus, an extremely large plate causes the following adverse effects.
(B) The weight of the column increases, causing a drop in on-site construction capability.
(B) Since the plates of the finished product are packed in a large plate, the plate and the flange must be packed separately, which is complicated.
(C) When packing packed struts in units of 10 to 20 are placed on a pallet, the plate is extremely large, so the stability is poor and extra labor is required for packing.
(D) Due to poor packing stability, cargo collapses easily during transportation.
(E) When unloading luggage at a transportation destination, because of poor stability, there is a great risk of the luggage falling after being suspended by a crane.
(F) Since packaging materials increase, waste increases accordingly.
(G) In the case of a column made of ductile cast iron or aluminum, the metal frame for molding becomes large and casting by a molding machine is difficult.
(H) It is very difficult to cast a column for longitudinal gradient in the cast product, that is, the main mold cannot be released from the sand mold, and a large core is required. However, the cost increases.
Therefore, since it can be manufactured only with a welded structure, it is not suitable for a cast column that enables mass production.

  On the other hand, in this embodiment, the width on the front end side is 150 to 160 mm, the depth is 205 to 220 mm, and the size is the same as that of a conventional plate in which four round holes are arranged. Is possible. Accordingly, the above-described adverse effects can be solved.

  In the present embodiment, the details of the guard fence post for bridge are described in detail. However, the guard fence post for bridge is not necessarily required. For example, any support column may be used as long as it is installed on the laid concrete such as an elevated railway, or a fence or soundproof wall surrounding the site.

<Second Embodiment>
FIG. 7 (FIG. 7A) shows a schematic diagram for explaining an example of a reinforcing plate attached to a plate of a bridge guard fence post to which the present invention is applied, and FIG. 7B shows the present invention to which the present invention is applied. Is a schematic diagram for explaining an example of a reinforcing plate attached to a plate of a guard fence post for a bridge to which is applied.) Is a diagram for explaining another example of a plate of a guard fence post for a bridge to which the present invention is applied. It is a schematic diagram.

  The plate 3 shown here has a structure in which the holes 17 and 17A are penetrated as described in detail with reference to FIGS.

  Here, as shown in FIG. 7A, a so-called angle-shaped reinforcing plate 22 that is bent at a substantially right angle along the longitudinal direction of the plate 3 so as to face the second flange 8 of the plate 3. Are fixed on the plate 3 by welding or the like.

  Further, as shown in FIG. 7 (B), a so-called channel-like shape is formed by being folded into a U-shaped cross section along the longitudinal direction in a state of being opposed so as to sandwich the second flange 8 of the plate 3. Reinforcing plates 22A are fixed on the plate 3 by welding or the like.

  In this embodiment, the angle-shaped or channel-shaped reinforcing plate will be described in detail. However, it is not always necessary to have the angle-shaped or channel-shaped reinforcing plate. For example, the plate 3 such as a steel plate is bent. Any shape can be used as long as the structure can be reinforced.

  According to the present invention, as shown in FIG. 8, the bridge guard fence post 1 is installed on the ground-covering concrete 2 without a rail (not shown) protruding on the roadway side A. In this case, the plate 3 is fixed by the anchor bolt 4 in a state where the second flange 8 side of the plate 3 protrudes in the direction B on the opposite side of the roadway of the cover concrete 2.

  Here, when a load in the direction B on the opposite side of the roadway is applied to the bridge guard fence post 1 due to a collision with a traveling vehicle or the like, the direction B on the opposite side of the roadway of the cover concrete 2 of the plate 3 is applied. A downward load is applied to the protruding part.

  In this case, the reinforcing plate 22 is fixed in a state of being opposed so as to sandwich the second flange 8 side of the plate 3, thereby having strength against a downward load.

  Therefore, it is possible to maintain the state in which the plate 3 does not protrude from the ground-covering concrete 2 by providing the reinforcing plate 22. Thereby, it becomes possible to protect the vehicle without collapsing the ground-covered concrete 2 by bending from the middle of the first flange 7 and the second flange 8 by applying a load to the guard fence post 1 for the bridge. .

<Third Embodiment>
FIG. 9 (FIG. 9A) illustrates an example in which one hole is provided between the first flange and the second flange in the bridge guard fence post to which the present invention is applied. FIG. 9B illustrates an example in which three holes are provided between the first flange and the second flange in the bridge guard fence post to which the present invention is applied. Is a three-dimensional schematic diagram showing another example of a guard fence post for a bridge to which the present invention is applied.

  The guard fence post 1 for bridge shown here includes a plate 3, a first flange 7 and a second flange 8 erected on the plate 3 so as to be parallel to each other, and the first flange 7. And a web 9 connecting the second flange 8.

  Here, the plate 3 is fastened by a fastening member 20 comprising four anchor bolts 4, nuts, washers and the like, the base portion of which is embedded in the ground-covering concrete 2 and the upper portion of the plate 3 projects from the ground-covering concrete 2. It is fixed.

  Further, the web 9 is joined by welding or the like along the center vertical direction of the back surface of the first flange 7 and the second flange 8, and the anchor bolt 4 or the fastening member 20 can pass through substantially the center of the lower end thereof. A space 16 having a region is formed.

  Here, as shown in FIG. 9 (A), between the first flange 7 and the front end of the plate 3, two hole portions arranged in arbitrary directions of the two anchor bolts on the roadway side, respectively. 17B and 17B are penetrated along the longitudinal direction of the ground concrete 2.

  Further, a space 16 opened between the web 9 and the plate 3 is provided between the first flange 7 and the second flange 8 so that the opening area of the hole 17 faces. Yes. Further, the hole portion 17 is formed in an arc shape with the space portion 16 of the web 9 as a center and toward the left and right sides and in the first flange 7 side direction.

  Next, as shown in FIG. 9B, between the first flange 7 and the second flange 8, two holes 17B and 17B are formed on both sides of the web 9 in the longitudinal direction of the ground concrete 2. It penetrates along the direction. The two holes 17B and 17B are arranged in any direction of the two anchor bolts on the roadway side or on the opposite side of the roadway (the roadway side in this embodiment).

  Further, a space 16 opened between the web 9 and the plate 3 is provided between the first flange 7 and the second flange 8 so that the opening area of the hole 17 faces. Yes. Further, the hole portion 17 is formed in an arc shape with the space portion 16 of the web 9 as a center and toward the left and right sides and in the first flange 7 side direction.

  Further, a reinforcing rib 18 is erected from the plate 3 along the center of the second flange 8 on the surface B of the second flange 8 opposite to the roadway of the cover concrete 2.

  Next, FIG. 10 (FIG. 10 (A), (B) shows a schematic diagram for explaining the usage pattern of the plate in FIG. 9, and FIG. 10 (C) shows another plate in FIG. 9 (B). The schematic diagram for demonstrating a form is shown.) Is a schematic diagram for demonstrating the usage form of the plate of the guard fence support | pillar for bridges to which this invention is applied.

  Here, as shown in FIG. 10 (A), the holes 17B and 17B penetrating along the longitudinal direction of the ground concrete 2 between the first flange 7 and the front end of the plate 3 are the ground concrete 2. Is placed on the upper surface of the ground concrete 2 so as not to overlap the reinforcing bar 19 on the roadway side A. Further, the arrangement of the two anchor bolts in a state in which the anchor bolt 4 is shifted in the holes 17B and 17B so as not to overlap the reinforcing bar 19A is determined.

  In addition, the anchor bolt 4 is placed in the hole 17 formed in an arc shape toward the first flange 7 so as not to overlap with the reinforcing bar 19 and the reinforcing bar 19A on the opposite side B of the roadway of the underground concrete 2. The arrangement of the two anchor bolts in the shifted state is determined.

  Moreover, as shown in FIG. 10 (B), holes 17B and 17B that are provided in the plate 3 between the first flange 7 and the second flange 8 along the longitudinal direction of the ground concrete 2 are provided. The ground cover concrete 2 is placed on the top surface of the ground concrete 2 so as not to overlap the reinforcing bar 19 on the roadway side A. Further, the arrangement of the two anchor bolts in a state in which the anchor bolt 4 is shifted in the holes 17B and 17B so as not to overlap the reinforcing bar 19A is determined.

  In addition, the anchor bolt 4 is placed in the hole 17 formed in an arc shape toward the first flange 7 so as not to overlap with the reinforcing bar 19 and the reinforcing bar 19A on the opposite side B of the roadway of the underground concrete 2. The arrangement of the two anchor bolts in the shifted state is determined.

  Further, as shown in FIG. 10 (C), holes 17B and 17B penetrating the plate 3 on the second flange 8 side along the longitudinal direction of the ground concrete 2 are road side A of the ground concrete 2. Is placed on the top surface of the ground-covering concrete 2 in a state where it does not overlap with the rebar 19. Further, the arrangement of the two anchor bolts in a state in which the anchor bolt 4 is shifted in the holes 17B and 17B so as not to overlap the reinforcing bar 19A is determined.

  Further, the anchor bolt 4 is shifted so as not to overlap the reinforcing bar 19 and the reinforcing bar 19A on the roadway side A of the underground concrete 2 in the hole portion 17 formed in an arc shape toward the second flange 7 side. The arrangement of the two anchor bolts in the state is determined.

  In the guard fence post for a bridge according to the present invention having the above-described configuration, the anchor bolt without shifting the position of the guard fence post for the bridge with respect to the reinforcing bars arranged vertically and horizontally in the cover concrete on the upper surface of the existing cover concrete. Can be determined.

  In addition, at least two anchor bolts can be disposed in the arc-shaped hole that is opened between the first flange and the second flange. As a result, it is possible to determine the placement of the anchor bolts while ensuring a sufficient movement distance of at least two anchor bolts in any direction.

  In addition, by providing a space facing the opening area of the hole between the plate and the lower end of the web, the anchor bolt position can be arranged in the vicinity of the web or in the space, greatly expanding the area where the anchor bolt is arranged. It becomes possible to improve.

  In addition, by arranging two holes along the longitudinal direction of the ground-covering concrete, the anchor bolts should be arranged after sufficiently securing the movement distance of the two anchor bolts in any direction. Is possible.

  Further, a reinforcing rib 18 is provided on the surface B of the second flange 8 on the opposite side of the roadway of the concrete 2 to cause the bridge guard fence post 1 to face in the direction B on the opposite side of the roadway due to a collision with a traveling vehicle. When the load is applied, it is possible to have strength against the downward load.

DESCRIPTION OF SYMBOLS 1 Guard fence pillar 2 Covering concrete 3 Plate 4 Anchor bolt 7 1st flange 8 2nd flange 9 Web 10 Sleeve 11, 11A, 11B Rail 12, 12A, 12B Mounting receiving part 13 Bolt insertion hole 14 For fastening Screw hole 15 Fastening bolt 16 Space portion 17, 17A, 17B Hole portion 18 Reinforcing rib 19, 19A Reinforcing bar 20 Fastening member 22, 22A Reinforcing plate

Claims (9)

A plate having at least four anchor bolts fixed on the concrete cover of the bridge, and at least two anchor bolts each having a hole in which two holes can be arranged at arbitrary positions;
A first flange erected on the plate;
A second flange erected on the plate substantially parallel to the first flange;
A web connecting the first flange and the second flange;
A bridge provided between the plate and the web, at least in a region corresponding to the hole, and configured to allow the anchor bolt or a fastening member attached to the anchor bolt to pass therethrough. Guard fence post. The guard fence post for a bridge according to claim 1, wherein at least one of the holes is formed along a longitudinal direction of the cover concrete. The guard fence post for a bridge according to claim 1 or 2, wherein at least one of the holes is formed with an inclination angle with respect to a longitudinal direction of the ground concrete. The guard fence post for a bridge according to claim 1, 2 or 3, further comprising a reinforcing plate fixed on the plate in a state of being opposed so as to sandwich the second flange. The bridge protection fence post according to claim 4, wherein the reinforcing plate has a predetermined length and is bent at a substantially right angle along a longitudinal direction thereof. The guard fence post for a bridge according to claim 4, wherein the reinforcing plate has a predetermined length, and both side ends along the longitudinal direction thereof are bent at a substantially right angle. A plate having at least four anchor bolts fixed on the ground concrete of the bridge, and provided with holes at three positions where the anchor bolts can be arranged at arbitrary positions;
A first flange erected on the plate;
A second flange erected on the plate substantially parallel to the first flange;
A web connecting the first flange and the second flange;
The anchor bolt is attached to the anchor bolt or the anchor bolt, and is provided in a region corresponding to the one hole formed at an inclination angle with respect to the longitudinal direction of the ground concrete between the plate and the web. A guard fence post for a bridge provided with a space configured to allow a fastening member to pass therethrough. A plate that is fixed with at least four anchor bolts, and has holes provided at two positions in which each of the at least two anchor bolts can be arranged at an arbitrary position;
A first flange erected on the plate;
A second flange erected on the plate substantially parallel to the first flange;
A web connecting the first flange and the second flange;
A support column provided with a space portion provided between at least the hole portion between the plate and the web and configured to allow the anchor bolt or a fastening member attached to the anchor bolt to pass therethrough. A plate which is fixed with at least four anchor bolts and has holes provided at three positions in which the anchor bolts can be arranged at arbitrary positions;
A first flange erected on the plate;
A second flange erected on the plate substantially parallel to the first flange;
A web connecting the first flange and the second flange;
The anchor bolt is attached to the anchor bolt or the anchor bolt, and is provided in a region corresponding to the one hole formed at an inclination angle with respect to the longitudinal direction of the ground concrete between the plate and the web. And a space configured to allow the fastening member to pass therethrough.

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