JPH09291516A - Concrete guard fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guard fence which is used suitably at an end of a road or the like, and which can effectively enhance the attaching strength. SOLUTION: A leg 4 attached to the lower part of an oblique surface 3 on one side of a wall body 2 is formed therein with mounting recesses 5 and mounting pipes 6. An anchor bolt 7 inserted in each of the pipes 6 is fixed to a foundation 8 planted thereon with a plurality of reinforcing bars 25 which are received in mounting holes 20 formed in the lower surface 2A of the wall body 2. A filler 24 is filled through a filling port 23 so as to unite the reinforcing bars 25 planted on the foundation 8, with the wall body 2. Since it is not required to fix the wall body 2 on the other side thereof, thereby it is possible to install the guard fence at one end of a road R.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a concrete guard fence.

[0002]

The guard fence is provided mainly to prevent a vehicle deviating from the driving lane from departing from the road or into an oncoming lane, and must have a sufficient deviation preventing effect. I have to.
Further, in an emergency situation such as a brake trouble, it is also used for making an emergency stop by rubbing the vehicle against a fence, and sufficient stability and impact strength are required.
Then, concrete guard fences having excellent strength and durability have been widely used in place of the conventional steel guard fences, for example, the actual Kaihei 2-1182.
In Japanese Patent Application Laid-Open No. 63-88799, fixing means are provided on both lower sides of the body of the protective wall, and the fixing means is fixed to the roadbed through the fixing means (the same microfilm, p. 7, pages 3-4).
Row) A concrete protective wall is known, and in order to improve the strength of a concrete guard fence, in the concrete guard fence of Japanese Utility Model Publication No. 6-57918 (Application No. 5-1258), the upper part of the guard fence is used. A PVC pipe is embedded in the pipe, and a PC steel material that is a member for lateral tightening is inserted into the pipe (No. 0011 of the microfilm of Japanese Patent Application No. 5-1258), and the PC steel material strains the concrete guard fence. A concrete guard fence to which force is applied is known, and this concrete guard fence is fixed to the concrete foundation by inserting anchor bolts into the mounting pipes provided on the lower parts of both sides (the same 0013th step), Both sides in the width direction of the fence are fixed to the foundation with anchor bolts.

By the way, in the above concrete protective wall,
Both sides in the width direction are fixed to the roadbed by fixing means, and in the concrete guard fence, since both sides in the width direction are fixed to the foundation by anchor bolts, a place where one side in the width direction cannot be fixed, for example, a road. It cannot be used in place where there is a restriction on the installation space such as the shoulder of the end of the bridge, or on the balustrade of the end of the bridge.

Therefore, Japanese Utility Model Application Laid-Open No. 58-171914 (Japanese Patent Application No. 58-37009) discloses a guard fence for balustrades of expressways (Japanese Patent Application No. 58-37009, page 12, pages 9 to 9). 10 line), as shown in FIG. 4, a hole is formed in the center of the protective wall in the width direction, and a vertical bar member is inserted into the hole and the paved road surface. Since the upper and lower ends of the rod-shaped member are fixed to the inside of the protective wall and the lower surface of the paved road surface, and the protective wall is fixed to the paved road surface, there is a problem that the mounting work becomes complicated and costly. Since the lower end of the member is fixed on the lower surface of the paved road surface, it cannot be used on an ordinary road or the end of a road formed on the top of the embankment. Although different from the guard fence, the piece stop block of Japanese Utility Model Laid-Open No. 60-162105 (Japanese Utility Model Application No. 60-40802) has a structure in which the center of the block in the width direction is fixed, and a vertical hole is penetrated from the bottom surface. Form the block stopper block provided, insert a pre-fixed anchor in the concrete foundation (page 16 to 18 of page 3 of the microfilm of Japanese Utility Model Application No. 60-40802), and place the anchor in the vertical hole. , A method of filling the vertical hole with concrete is described, but sufficient attachment strength cannot be obtained only by attaching the anchor to the concrete.

[0005] Therefore, an object of the present invention is to provide a concrete guard fence suitable for use at the end of a road and the like and capable of effectively increasing the mounting strength.

[0006]

According to a first aspect of the present invention, there is provided a wall body made of precast concrete having inclined surfaces on both sides in the width direction, and a mounting recess provided on one side surface in the width direction of the wall body. An insertion hole formed in the lower surface of the wall body from the mounting recess, a wall body fixing member that is inserted into the insertion hole and fixes the lower portion to the foundation, and a plurality of reinforcing bars erected on the foundation, The wall main body is provided with a mounting hole which is provided substantially in the center of the lower surface and accommodates the plurality of reinforcing bars, and a filler injection port which connects the mounting hole and an upper portion of the wall main body. The wall body is laid on the side, the filling material is filled from the filling material injection port, the reinforcing bar erected on the foundation is integrated with the wall body, and one side of the wall body is fixed by the wall body fixing member. Secure to the foundation. And since it is not necessary to fix the other side of the wall body to the foundation, it is possible to install it on the end of the road.

According to a second aspect of the present invention, a leg portion protruding laterally is provided at a lower portion of one side surface of the wall body, and a plurality of the mounting recesses are provided in the leg portion, and a plurality of reinforcing bars are provided on the foundation. Are arranged side by side in the lengthwise direction of the wall main body, and the mounting holes for accommodating the plurality of reinforcing bars are formed such that the lengthwise direction is longer than the widthwise direction, and the mounting holes are attached to the leg portions protruding laterally. Since the recess is provided, a large distance can be secured between the insertion point position and the fixing member, and the force of tilting the wall body can be effectively resisted. In addition, by accommodating a plurality of reinforcing bars arranged in the length direction in the mounting holes and filling the filler, the wall main body can be firmly fixed to the foundation through the plurality of reinforcing bars.

According to a third aspect of the present invention, the length of the portion of the reinforcing bar to be housed in the mounting hole is ½ or more of the height of the wall body, and the width and the length interval of the mounting hole are directed downward. Since the length of the contact portion between the reinforcing bar and the filler is long, the wall body can be firmly fixed to the foundation, and the width and length of the mounting hole during installation. Since the space is enlarged downward, it is possible to easily suspend the wall body and store the plurality of reinforcing bars in the mounting holes.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show one embodiment of the present invention, in which a concrete guard fence 1 (hereinafter referred to as a guard fence) is a wall that slightly expands downward as shown in the sectional view of FIG. It comprises a body 2 which is made of precast concrete of high strength concrete. On both sides of the wall body 2, flat inclined surfaces 3 and 3 having a predetermined horizontal inclination angle θ of about 75 degrees or more and less than 90 degrees are formed. Inside the wall body 1, rebars (not shown) are arranged. The wall body 1 is formed to have a height of 1 m (meter) and a length of about 3 m in this example. Further, as shown in FIG. 1, the other inclined surface 3 on the right side of the drawing is formed to have a larger predetermined angle θ than the one inclined surface 3. One side of the flat inclined surface 3 is provided with a leg portion 4 protruding laterally, and the leg portion 4 has a vertical surface 4B below the inclined surface 4A. As shown in FIG. 2, the leg portion 4 is provided with a plurality of mounting recesses 5 each having a vertically long front surface and having a notched groove section at equal intervals in the lengthwise direction of the wall body 2.
A mounting pipe 6 made of vinyl chloride is embedded by being inserted from the bottom surface of the wall into the lower surface 2A of the wall body 2, and the mounting pipe 6 serving as the insertion hole is inserted.
An anchor bolt 7 such as a chemical anchor, which is a fixing member, is inserted therethrough, and the anchor bolt 7 is fixed to the concrete foundation 8. Further, a fixing nut 7A is screwed onto the upper portion of the anchor bolt 7, and the anchor bolt 7
The upper part of the is housed in the mounting recess 5.

At the center of one end face in the length direction of the wall body 2,
The ridge 10 is provided vertically, and the receiving groove 11 with which the ridge 10 engages is vertically provided at the other end in the length direction. In addition, at the upper ends of both ends of the wall body 2, side end portions are opened and upper opening portions are formed.
A connecting recess 12 having 12A is formed, and this connecting recess is formed.
Corresponding to 12, the upper part of the wall body 2 is made of PVC pipe 13
Is embedded in the lengthwise direction of the wall main body 2, a PC steel material 14 as a lateral fastening member is inserted into a pipe 13 which is a hole, and a connection end portion having a screw portion for connecting a coupler of the PC steel material 14 is inserted.
14A are respectively exposed in the connecting recesses 12, and the connecting ends 14A and 14A are connected by a coupler 15. The PC steel material 14 is prestressed in advance and is fixed by the fixing tool 16.

A mounting hole 20 is formed substantially in the center of the flat lower surface 2A of the wall body 2, and the mounting hole 20 is formed so that its length direction is longer than its width direction, and its length is about 1.5 meters or more. And is more than half the length of the wall body 2,
The solid portions 2 of the wall body 2 are provided on both sides of the mounting hole 20 in the longitudinal direction.
1, 21 are provided. Further, the height of the mounting hole 20 is about 0.7 meters, which is more than half the height of the wall body 2, and the wall body 2 is located above the mounting hole 20.
A solid portion 22 is provided, and a stepped filler injection port 23 that communicates the mounting hole 20 and the upper surface of the wall body 2 is provided at the center of the solid portion 22. A filler 24 such as concrete is filled from the inlet 23 into the mounting hole 20. Further, the mounting holes 20 are formed such that their widths and length intervals are enlarged downward.

The concrete foundation 8 is provided at the end of the road R, an end face 8B in the vertical direction is formed at the end of the concrete foundation 8, and the wall body 2 is provided at the end of the road R. That is, the upper surface of the concrete foundation 8 is formed above the slope of the embankment or is constituted by the end of the concrete slab such as a bridge. A plurality of reinforcing bars 25, which are reinforcing bars, are erected at equal intervals on the concrete foundation 8 in the length direction of the road R, and lower portions of these reinforcing bars 25 are fixed to the concrete foundation 8. Further, if atypical bar is used for the reinforcing bar 25, the adhesion with the filling material 24 is improved.

Next, the construction of the guard fence 1 will be described. The wall main body 2 is lifted, and the mounting holes 20 are hung so that the mounting holes 20 are aligned with the rebars 25 erected on the concrete foundation 8. Wall main bodies 2 and 2 are arranged, the protrusions 10 and the receiving grooves 11 are engaged with each other to connect the adjacent wall main bodies 2 to each other, and the coupler 15 connects the connecting end portions 14 of the PC steel materials 14 to each other.
The wall body 2 is integrally rigidly connected in the length direction by connecting A and 14A. In this case, the adjacent wall bodies 2 and 2 are aligned by the engagement of the projection 10 and the receiving groove 11, and the projection 10 and the receiving groove 11 are aligned.
The adjacent wall bodies 2 and 2 are firmly connected to each other due to the impact from the front direction by the overlapping portion with
The ends 14A and 14A of the C steel material 14 are connected to each other to be more firmly integrated. Further, the connecting work in the length direction can be easily performed by inserting the tools or hands from the upper opening 12A after the wall bodies 2 are arranged. Further, a drill (not shown) is inserted into the mounting pipe 6, a vertical hole 26 is bored in the concrete foundation 8, the lower part of the anchor bolt 7 is fixed to the vertical hole 26, and the nut 7A is tightened to the leg portion 4 side. Is fixed to the foundation 8, and then the mounting recess 5 is filled with a filling material (not shown) such as concrete to form the inclined surface 4
Finish flush with A. Furthermore, a filling material 24 having a hardening property such as mortar concrete is filled from the filling material injection port 23, and the filling material 24 is hardened and adheres closely to the bar 25.

In this way, the guard fence 1 can be installed at the end of the road R, and the filler 25 and the reinforcing bar 25 portion having a height of 1 or more per 2 minutes of the height of the wall body 2 are formed. Even if a vehicle traveling on the road R collides with and an impact force F is applied to the wall body 2, it is possible to withstand the close contact and the anchor bolt 7, and the impact force F is also applied. Even if the force to collapse the wall body 2 is exerted by F,
Since the anchor bolt 7 is provided on the road R side at a distance H away from the wall 25, the anchor bolt 7 effectively acts on the moment about the position of the insertion line 25 and the wall body 2 falls down. Can be prevented. In addition, mounting holes
Since the wall 20 is formed to be long in the length direction of the wall body 2 and a plurality of rebars 25 which are erected at intervals in the mounting holes 20 are accommodated, the wall body 2 and the foundation 8 are filled with the filling material 24. The line
It can be firmly integrated via 25.

As described above, in this embodiment, according to claim 1, a wall body 2 made of precast concrete having flat inclined surfaces 3 on both sides in the width direction and one side surface in the width direction of the wall body 2. The mounting recess 5 provided, the mounting pipe 6 that is an insertion hole formed from the mounting recess 5 to the lower surface 2A of the wall body 2, and the lower portion of the mounting pipe 6 that is inserted into the base 8 Anchor bolt 7 as a fixing member for the wall body to be fixed
And a plurality of rebars 25 which are erected on the foundation 8 and the plurality of rebars provided substantially at the center of the lower surface 2A of the wall body 2.
Since the mounting hole 20 for accommodating 25 and the filling material inlet 23 that communicates the mounting hole 20 with the upper surface of the wall body 2 are provided, the flat inclined surface 3 on one side is connected to the road R side. Then, the wall main body 2 is laid, and the filler 24 is filled from the filler injection port 23 to integrate the bar 25 erected on the foundation 8 and the wall main body 2, and further, one side of the wall main body 2 The anchor bolts 7 can be fixed to the foundation 8 to effectively increase the mounting strength, and since it is not necessary to fix the other side of the wall body 2 to the foundation 8 in this way, the installation at the end of the road R can be prevented. It will be possible.

Further, as described above, in this embodiment, claim 2
Corresponding to, at the bottom of the flat inclined surface 3 on one side of the wall body 2,
A leg portion 4 protruding laterally is provided, a plurality of mounting recesses 5 are provided in the leg portion 4, and a plurality of rebars 25 are provided on the foundation 8 side by side in the length direction of the wall body 2. Since the mounting hole 20 for accommodating the streak 25 is formed to be longer in the length direction than in the width direction, the mounting recess 5 and the mounting pipe 6 are provided in the leg portion 4 protruding laterally. The distance H between the position of the line 25 and the anchor bolt 7 can be set large,
It is possible to effectively resist the force of tilting the wall body 2. In addition, attach the reinforcing bar 25 that is aligned in the length direction to the mounting hole 20.
The wall main body 2 can be firmly installed on the foundation 8 via the plurality of rebars 25 by housing the same in the above and filling the filling material 24.

Further, as described above, in this embodiment, in accordance with claim 3, the length of the portion of the reinforcing bar 25 to be housed in the mounting hole 20 is set to ½ or more of the height of the wall body 2, Since the width and the length interval of the mounting holes 20 are enlarged downwardly, the length of the contact portion between the reinforcing bar 25 and the filler 24 becomes long, so that the wall body 2 is firmly fixed to the foundation 8. In addition, since the width and the length interval of the mounting holes 20 are formed to expand downward in installation, the wall main body 2 is hung and a plurality of reinforcing bars 25 are attached to the mounting holes 20. It can be easily stored in the.

As an effect of the embodiment, since the upper portion of the wall body 2 is prestressed by the PC steel material 14, the strength of the wall body 2 made of concrete is improved.
Furthermore, since the wall body 2 is molded from high-strength concrete, impact resistance is improved. Further, since the wall body 2 is lightened only by the amount of the mounting hole for 20 minutes, the hanging work and the like becomes easy. Further, since the injection port 23 is smaller than the area of the flat cross section of the mounting hole 20, the filling material 24 only needs to be finished for the injection port 23. In addition, with the wall body 2 placed on the foundation 8, the mounting hole 20 is closed by the solid portions 21, 21 on both sides in the length direction, the upper solid portion 22, and the upper surface of the foundation 8, entrance
The filler 24 filled from 23 does not leak to the outside and the construction can be easily performed.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the shape, size, size, etc. of the wall body can be appropriately selected. The shapes, dimensions, sizes, etc. of the ridges, the receiving grooves, and the recesses may be such that concave and convex portions having the same shape are engaged with each other, and the arrangement thereof can also be appropriately selected. Furthermore, it goes without saying that the foundation may be either cast-in-place concrete or precast. Further, in FIG. 1, the filling material is filled up to the step portion of the injection port, but it may be filled up to the upper surface of the wall body.

[0020]

According to the invention of claim 1, a wall body made of precast concrete having inclined surfaces on both sides in the width direction, a mounting recess provided on one side surface in the width direction of the wall body, and a mounting recess. A through hole formed in the lower surface of the wall body from a place, a wall body fixing member that is inserted into the through hole and fixes the lower portion to the foundation, a plurality of reinforcing bars erected on the foundation, and the wall body It is provided with a mounting hole that is provided substantially in the center of the lower surface and accommodates the plurality of reinforcing bars, and a filler injection port that communicates the mounting hole with the upper portion of the wall body, and is used for the end of a road or the like. It is possible to provide a concrete guard fence that is suitable and can effectively increase the mounting strength.

According to a second aspect of the present invention, a leg portion projecting laterally is provided at a lower portion of one side surface of the wall body, and a plurality of the mounting recesses are provided in the leg portion, and a plurality of reinforcing bars are provided on the foundation. Are provided side by side in the lengthwise direction of the wall main body, the mounting holes for accommodating the plurality of reinforcing bars are formed such that the lengthwise direction is longer than the widthwise direction, and are suitable for use at the end of a road, It is possible to provide a concrete guard fence capable of effectively increasing the mounting strength.

According to a third aspect of the present invention, the length of the portion of the reinforcing bar to be housed in the mounting hole is set to ½ or more of the height of the wall main body, and the width and the length interval of the mounting hole are directed downward. Thus, it is possible to provide a concrete guard fence that is enlarged and formed, is suitable for use at the end of a road, etc. and can effectively increase the mounting strength.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in the width direction showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is an enlarged plan view of a main part showing an embodiment of the present invention.

[Explanation of symbols]

 2 Wall body 2A Lower surface 3 Flat inclined surface 4 Legs 5 Mounting recess 6 Mounting pipe (insertion hole) 7 Anchor bolt (fixing member for wall body) 8 Concrete foundation 20 Mounting hole 23 Filler inlet 24 Filler 25 Reinforcing bar (rebar)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Akama 4-2 Kojimachi, Chiyoda-ku, Tokyo Within Kowa Concrete Co., Ltd. (72) Inventor Tadashi Yanagisawa 5-33-11, Shinbashi, Minato-ku, Tokyo Nippon Hume Co., Ltd. In the company

Claims (3)

[Claims] 1. A wall main body made of precast concrete having inclined surfaces on both sides in the width direction, a mounting recess provided on one side surface in the width direction of the wall main body, and a lower surface of the wall main body from the mounting recess. A through-hole that has been drilled, a wall body fixing member that is inserted into the through-hole and fixes the lower part to the foundation, a plurality of reinforcing bars that are erected on the foundation, and the wall body is provided substantially at the center of the lower surface of the wall body. A concrete guard fence comprising: a mounting hole for accommodating a plurality of reinforcing bars; and a filler injection port that connects the mounting hole and an upper portion of the wall body. 2. A leg portion protruding laterally is provided at the lower part of one side surface of the wall body, and a plurality of the mounting recesses are provided on the leg portion, and a plurality of reinforcing bars are provided on the foundation of the wall body. The concrete guard fence according to claim 1, wherein the attachment holes that are arranged in the lengthwise direction and that accommodate the plurality of reinforcing bars are formed so that the lengthwise direction is longer than the widthwise direction. 3. A length of a portion of the reinforcing bar to be housed in the mounting hole is set to be ½ or more of a height of a wall body, and a width and a length interval of the mounting hole are enlarged downward. The concrete guard fence according to claim 2, wherein