JP4820890B2 - Guard fence fixing structure - Google Patents

Description

  The present invention relates to a protective fence fixing structure, and more particularly, to a protective fence fixing structure that allows a vehicle to smoothly pass through an opening when a protective fence installed at an opening of a central separator is removed.

  There are steel slabs that constitute the superstructure of the road bridge and directly support the road surface on which vehicles and people pass. When a protective fence is installed on the upper surface of a road bridge, for example, as disclosed in Japanese Patent Application Laid-Open No. 2008-223332, anchor bolts are embedded in ground concrete in advance, and the anchor bolts, nuts, etc. A protective fence is fastened and fixed to the upper surface of the road bridge.

JP 2008-223332 A (paragraphs [0016, 0018])

  However, for example, when using a work vehicle to replace the protective fence, or when moving an emergency vehicle or the like to the opposite lane, it was buried even if the protective fence installed in the opening of the median strip was removed. Since the upper end of the anchor bolt protrudes from the road, a trouble occurs when a vehicle such as a work vehicle or an emergency vehicle passes through the opening. For this reason, when the vehicle passes through the opening, it is necessary to cure the anchor bolts, so that the efficiency of the protective fence replacement work is reduced, and it takes more time than necessary for the vehicle to pass. Therefore, there is a problem that the vehicle cannot pass through the opening smoothly.

  The present invention was made to solve the above-described problems, and when the protective fence installed in the opening of the median strip is removed, the vehicle can smoothly pass through the opening of the protective fence. The purpose is to provide a fixed structure.

  In order to achieve this object, the protective fence fixing structure according to claim 1 includes a steel floor slab that supports a road surface on which a vehicle passes, a foundation portion disposed above the floor slab, and a foundation thereof. And a fastening member that fastens and fixes the protective fence to the foundation and the floor slab, wherein the fastening member is a protective fence in which a male screw is threaded. A bolt member, and a nut member screwed into a female screw that can be screwed with a male screw of the guard fence bolt member, and disposed on the foundation portion or the floor slab. The guard fence bolt member is screwed into the nut member via the insertion hole, so that the guard fence is fastened and fixed to the base portion. The

  The protective fence fixing structure according to claim 2 is the protective fence fixing structure according to claim 1, wherein the floor slab includes a through hole, the nut member is embedded in the base portion, and the protective fence bolt member is screwed. A fastening nut member to be joined, a floor slab nut member disposed on a lower surface of the floor slab, and one end side fixed to the fastening nut member and the other end side threaded with a male screw is a penetration of the floor slab A foundation bolt member screwed into the floor slab nut member through a hole.

  According to the guard fence fixing structure according to claim 1, the guard fence bolt member is screwed onto the nut member disposed on the foundation portion or the floor slab through the insertion hole formed in the foundation portion. Since the protective fence is fastened and fixed to the base portion, the protective fence bolt member can be removed from the basic portion by releasing the screwing of the protective fence bolt member and the nut member. As a result, when the protective fence is removed, the upper surface of the base portion becomes substantially flat, so that work such as curing the upper surface of the base portion becomes unnecessary. Therefore, the efficiency of the protective fence replacement work can be improved, and the time required for the passage of the vehicle such as the emergency vehicle can be shortened, so that the vehicle such as the work vehicle or the emergency vehicle passes through the opening smoothly. There is an effect that can be.

  According to the guard fence fixing structure according to claim 2, in addition to the effect exerted by the guard fence fixing structure according to claim 1, one end of the foundation bolt member is fixed to the fastening nut member and the male screw is threaded. Since the other end side is screwed into the floor slab nut member through the through hole of the floor slab, the foundation bolt member can be removed when the floor slab is installed. Therefore, when the road is asphalt paved, the upper surface side of the floor slab becomes substantially flat, so that the vehicle used for the paving work can smoothly pass on the floor slab and the work efficiency can be improved.

(A) is a top view of the road bridge in one embodiment of the present invention, (b) is a side view of the protective fence. It is sectional drawing of the floor slab, the protection fence, and foundation part in the II-II line of FIG.1 (b). (A) is sectional drawing of the floor slab, guard fence, and foundation part in the III-III line of FIG.1 (b), (b) is the floor slab and foundation part in the IIIb part of FIG.3 (a). It is a partial enlarged view. (A) is sectional drawing of a floor slab, (b) is sectional drawing of a floor slab and a foundation part.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, a schematic configuration of the road bridge 100 will be described with reference to FIG. Fig.1 (a) is a top view of the road bridge 100 in one embodiment of this invention. The road bridge 100 is a bridge or an elevated road used for an automobile high-speed national road or an automobile exclusive road, and a steel deck 2 (see FIG. 2) mainly constituting a road through which vehicles and people pass is a main girder. (Not shown) or the like.

  As shown in FIG. 1 (a), a central separation band 101 that separates lanes according to the direction of reciprocation is provided at the center of the road, and a faulty car, an emergency vehicle, or the like stops on the road shoulder. An emergency parking zone 102 is installed as a space. The central separation band 101 at a position corresponding to the emergency parking band 102 is provided with an opening 103 that is opened to a width that allows emergency vehicles to pass therethrough, and the protective fence 3 is installed in the opening 103.

  Next, a schematic configuration of the protective fence 3 will be described with reference to FIG. FIG. 1B is a side view of the protective fence 3. In FIG. 1B, the floor slab 2 and the base portion 5 are viewed in cross section, and the vertical ribs 22 (see FIG. 2) disposed below the floor slab 2 are omitted. Moreover, in FIG.1 (b), the reinforcing bar part of the base part 5 is abbreviate | omitted and shown, and it is the same also in FIGS.

  The protective fence 3 is for preventing the traveling vehicle from deviating from the road when the traveling direction is wrong. As shown in FIG. 1B, a flat base plate 31 and its base plate are provided. 31 mainly includes a rod-like column 32 erected at the center of 31 and a beam 33 having a corrugated cross section fastened and fixed to the column 32 with a bolt or the like. Further, the protective fence 3 is detachably fastened and fixed to the floor slab 2 via a base portion 5 described later.

  Next, with reference to FIG. 2, the structure of the floor slab 2 and the base part 5 is demonstrated. FIG. 2 is a cross-sectional view of the floor slab 2, the protective fence 3, and the base portion 5 taken along the line II-II in FIG. As shown in FIG. 2, a paved surface 4 in which asphalt is laid is formed on the upper surface of the floor slab 2, and in the longitudinal direction of the road surface 4 (perpendicular to the paper surface in FIG. 2) at the center of the upper surface of the floor slab 2. On the other hand, a base part 5 extending in parallel is placed.

  The floor slab 2 is a member mainly constituting a road through which a vehicle or a person passes, and has a deck plate 21 made of a steel plate and a cross section that extends parallel to the longitudinal direction on the lower surface of the deck plate 21. U-shaped vertical ribs 22 and plate-shaped horizontal ribs (not shown) extending perpendicularly to the vertical ribs 22 on the lower surface of the deck plate 21 are mainly provided. The foundation part 5 is a member for supporting the protective fence 3 and is mainly composed of reinforced concrete.

  Next, a configuration in which the protective fence 3 is fastened and fixed to the floor slab 2 will be described with reference to FIG. FIG. 3A is a cross-sectional view of the floor slab 2, the protective fence 3, and the foundation 5 taken along the line III-III in FIG. 1B, and FIG. 3B is a IIIb portion in FIG. It is the elements on larger scale of the floor slab 2 and the foundation part.

  As shown in FIG. 3A or 3B, the deck plate 21 has a plurality of through holes 21a into which a later-described foundation bolt member 63 can be inserted. A cylindrical floor slab nut member 61 in which a female screw is engraved is welded and fixed at a position corresponding to the through hole 21a. In addition, the plate | board thickness is thickened by joining the reinforcement plate 24 which consists of a steel plate to the part in which the through-hole 21a is drilled. Thereby, the strength reduction of the deck plate 21 due to the drilling of the through hole 21a is prevented.

  As shown in FIG. 3A, a gauge plate 51 made of a steel plate is embedded in the upper surface of the base portion 5, and an insertion hole 52 into which a later-described guard fence bolt member 7 can be inserted. Is drilled at a position corresponding to the through hole 21a. Further, on the lower surface side of the gauge plate 51, a fastening nut member 62 in which a female screw is threaded is embedded at a position corresponding to the insertion hole 52 and the through hole 21a.

  Further, as shown in FIG. 3 (a) or 3 (b), the foundation bolt member 63 in which the external thread is threaded is screwed into the fastening nut member 62 at one end side and penetrated at the other end side. The hole 21a is inserted and screwed into the floor slab nut member 61.

  One end side of the guard fence bolt member 7 in which the male screw is threaded is screwed into the fastening nut member 62, and the other end side protrudes from the upper surface of the gauge plate 51 through the insertion hole 52. A double nut is screwed to the other end of the protective fence bolt member 7, and the base plate 31 is sandwiched and fixed by the double nut and the gauge plate 51. Thereby, the protective fence 3 is fastened and fixed to the floor slab 2 via the foundation part 5.

  Next, with reference to FIG.3 and FIG.4, the installation procedure of the protection fence 3 is demonstrated. Fig.4 (a) is sectional drawing of the floor slab 2, and the condition after floor slab 2 construction at the time of installation of the road bridge 100 (refer FIG. 1) is shown. FIG. 4B is a cross-sectional view of the floor slab 2 and the base portion 5, and shows a state when the protective fence 3 is removed from the base portion 5.

  As shown in FIG. 4 (a), the deck plate 21 has a through hole 21a, and a deck plate 21 having the through hole 21a formed therein is joined to the top surface of the deck plate 21 to join the deck plate 21. 21 is prevented from lowering the strength. Also, vertical ribs 22 and horizontal ribs (not shown) for reinforcing the deck plate 21 are welded and fixed to the lower surface of the deck plate 21, and a floor slab nut member 61 is provided at a position corresponding to the through hole 21a. It is fixed by welding.

  Here, as shown in FIG. 3A or FIG. 3B, the foundation bolt member 63 is not configured to be welded and fixed to the upper surface of the floor slab 2 as in the prior art. Therefore, the foundation bolt member 63 can be removed from the floor slab 2 when the floor slab 2 is installed. Further, as shown in FIG. 4A, the floor slab nut member 61 is welded and fixed to the lower surface of the deck plate 21, so that when the floor slab 2 is installed, the upper surface of the floor slab 2 is substantially flat. Become. Therefore, when the pavement surface 4 is formed by paving the upper surface of the floor slab 2 with asphalt, the vehicle used for the paving operation can pass through the upper surface of the floor slab 2 smoothly, so that the work efficiency can be improved.

  After the pavement surface 4 is formed, as shown in FIG. 3 (a) or 3 (b), one end side of the foundation bolt member 63 is screwed into the fastening nut member 62, and the other end side is connected to the through hole 21a. It is screwed into the floor slab nut member 61 while penetrating. Thereafter, the position of the insertion hole 52 is aligned with the upper end of the fastening bolt member 62, and the concrete is poured into a pre-formed mold and cured while the gauge plate 51 is disposed on the upper surface. As shown in b), the base portion 5 is molded, and the gauge plate 51 and the fastening nut member 62 are embedded and fixed to the base portion 5.

  3A or 3B, the base plate 31 of the guard fence 3 is placed on the gauge plate 51, and one end of the guard fence bolt member 7 is inserted into the insertion hole 52. Then, it is screwed into the fastening nut member 62, and a hole drilled in the base plate 31 is inserted into a position corresponding to the insertion hole 52 on the other end side of the protective fence bolt member 7 protruding from the upper surface of the gauge plate 51. Finally, the base plate 31 is fastened and fixed to the base portion 5 by screwing a double nut to the other end side of the protective fence bolt member 7. As a result, the protective fence 3 is fixed to the floor slab 2 via the foundation 5.

  Next, with reference to FIG.3 and FIG.4 (b), the removal procedure of the protection fence 3 is demonstrated. After installing the protective fence 3, for example, when switching to a new protective fence 3 or when an emergency accident occurs or a vehicle that has been traveling in the direction of inaccessibility to the opposite lane When shifting, the protective fence 3 installed in the opening part 103 (refer FIG. 1) of the center separation band 101 provided for every fixed area may be removed.

  Here, as shown in FIG. 3 (a) or 3 (b), one end side of the guard fence bolt member 7 is screwed to the fastening nut member 62, so that it is screwed to the other end side of the guard fence bolt member 7. The guard fence bolt member 7 can be removed from the base portion 5 together with the double nut that is fitted. Therefore, as shown in FIG. 4B, in a state where the protective fence 3 is removed, the upper surface side of the base portion 5 becomes substantially flat, and work such as curing the upper surface of the base portion 5 becomes unnecessary. Accordingly, the efficiency of the replacement work of the protective fence 3 can be improved, and the time for a vehicle such as an emergency vehicle to pass through the opening 103 of the central separation band 101 can be shortened. Such a vehicle can smoothly pass through the upper surface side of the base portion 5.

  Further, when the guard fence bolt member 7 and the foundation bolt member 63 are integrated, the guard fence bolt member 7 and the foundation bolt member 63 are used when the guard fence 3 is replaced or a vehicle such as an emergency vehicle is passed. Since it is necessary to destroy the part where the guard fence bolt member 7 and the foundation bolt member 63 and the foundation part 5 are fixed to remove the guard fence 3 from the foundation part 5, it is necessary to re-install the guard fence 3 Work man-hours are required. In contrast, in the present invention, since the guard fence bolt member 7 and the foundation bolt member 63 are separated, the top surface of the foundation 5 can be simply removed by removing the guard fence bolt member 7 screwed into the fastening nut member 62. In order to re-install the protective fence 3, it is only necessary to fasten and secure the protective fence 3 to the foundation portion 5 by the protective fence bolt member 7, so that the number of work steps can be reduced.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  For example, in the above embodiment, the case where one end side of the foundation bolt member 63 is screwed into the fastening nut member 62 is described, but the present invention is not limited to this, and one end side of the foundation bolt member 63 is the fastening nut. The lower part of the member 62 may be fixed by welding or the like. In the above embodiment, a case has been described in which a double nut is screwed to the other end of the protective fence bolt member 7 and the base plate 31 is clamped and fixed by the double nut and the gauge plate 51. It is not restricted to this, A flange-like latching portion may be formed on the other end side of the protective fence bolt member 7, and the base plate 21 may be sandwiched and fixed by the latching portion and the gauge plate 51.

2 Floor slab 21a Through-hole 3 Guard fence 5 Foundation part 52 Insertion hole 61 Floor slab nut member 62 Fastening nut member 63 Foundation bolt member 7 Guard fence bolt member

Claims (2)

A steel floor slab that supports the road surface on which the vehicle passes, a foundation disposed above the floor slab, a protective fence erected from the foundation, and the protective fence of the foundation and the In the protective fence fixing structure provided with a fastening member for fastening and fixing to the floor slab,
The fastening member includes a guard fence bolt member in which a male screw is threaded, and a nut member that is threaded with a female screw that can be screwed with the male thread of the guard rail bolt member and is disposed on the foundation or the floor slab. And
The foundation includes an insertion hole drilled in a size that allows the protective fence bolt member to be inserted,
The guard fence fixing structure, wherein the guard fence bolt member is screwed to the nut member through the insertion hole, whereby the guard fence is fastened and fixed to the foundation portion. The floor slab includes a through hole,
The nut member is
A fastening nut member embedded in the foundation and screwed into the guard fence bolt member;
A floor slab nut member disposed on the lower surface of the floor slab,
A base bolt member having one end fixed to the fastening nut member and the other end screwed with a male screw screwed to the floor slab nut member through the through hole of the floor slab. The protective fence fixing structure according to claim 1.

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