JP5950343B2 - Fall prevention structure - Google Patents

Description

  The present invention relates to a fall prevention structure. In detail, it is related with the fall prevention structure provided in the existing parking lot.

Conventionally, a protective wall for preventing a vehicle from falling is attached to a self-propelled multilevel parking lot (see Patent Documents 1 to 3).
This protective wall is provided along the outer periphery and is fixed to a housing such as an outer peripheral large beam, and has a certain height from the parking floor. According to this protective wall, even if the vehicle runs away in the multi-story parking lot and collides with the protective wall, the vehicle is prevented from falling through the protective wall.

JP 7-158305 A JP-A-8-177258 Japanese Patent Application Laid-Open No. 11-247481

  By the way, the Ministry of Land, Infrastructure, Transport and Tourism issued a design guideline for the above-mentioned protective barriers (“Design Guidelines for Devices to Prevent Car Falling Accidents in Parking Lots”, Ministry of Land, Infrastructure, Transport and Tourism) , February 2003). According to this design guideline, the protective wall is required to have a structure that can withstand a predetermined impact force.

  However, the protective walls of existing self-propelled multistory parking lots may not be strong enough to meet the criteria set forth in the above technical recommendations. In other words, when the vehicle collides with the protective wall, an impact force acts in the horizontal direction at a predetermined height from the floor surface of the protective wall. Due to this impact force, a large bending moment is generated at the lower end of the protective wall, the protective wall may be bent outward, and the vehicle may jump out.

  Therefore, it is conceivable to provide a new protective wall for the existing self-propelled multilevel parking lot. In this case, the existing protective wall is dismantled and removed, and the floor is dismantled to expose the outer peripheral beam. Waterproofing work will be done. For this reason, there is a problem that the construction becomes large and costly.

  An object of this invention is to provide the fall prevention structure which can prevent the fall of the vehicle in the existing parking lot at low cost.

  The fall prevention structure (for example, a fall prevention structure 10 described later) according to claim 1 is a fall prevention structure provided in an existing parking lot (for example, an existing parking lot 1 described later), and the existing parking lot. Has an existing protective part (e.g., an existing parapet 2 described later) extending along the outer periphery, and a base (e.g., a floor surface described below) (e.g., a floor 3 described later) of the existing parking lot. A below-mentioned mountain retaining material 11), a protection portion (for example, a support column 12 and a protection plate 13 described later) extending upward from the base portion and extending substantially horizontally at a predetermined height from at least the floor surface, and the base portion It is characterized by comprising an interposition part (for example, an interposition part 14 described later) interposed between a side surface and the existing protection part.

  The fall prevention structure (for example, a fall prevention structure 10A described later) according to claim 2 is a fall prevention structure provided in an existing parking lot (eg, an existing parking lot 1 described later), and the existing parking lot. Has an existing protection part (for example, an existing handrail wall 4 described later) extending along the outer periphery, and a base (for example, a floor surface 3 described later) placed on the floor of the existing parking lot (for example, a floor surface 3 described later). And a later-described mountain retaining material 11), and a protection portion (for example, a support column 12 and a protection plate 13 described later) extending upward from the base and extending substantially horizontally at a predetermined height from the floor surface. The side surface of the base portion is in contact with the existing protection portion.

According to the present invention, when the vehicle collides with the protective part, the protective part is deformed and absorbs energy, and the impact force is distributed through the base and transmitted to the lower end of the existing protective part to act as a shearing force. . Therefore, since the bending moment generated at the lower end of the existing protective part can be reduced, the existing protective part can be prevented from bending outward and the vehicle can be prevented from falling.
Therefore, there is no need to dismantle the existing protective part and provide a new protective wall that can withstand a predetermined impact as in the prior art, so that the vehicle can be prevented from falling in the existing parking lot at a low cost.
In addition, since no construction is performed on the floor surface of the existing parking lot, the waterproof performance is not impaired, and the existing parking lot can be easily removed and transferred when dismantling.

The fall prevention structure (for example, a fall prevention structure 10A described later) according to claim 3 is a fall prevention structure provided in an existing parking lot (eg, an existing parking lot 1 described later), and the existing parking lot. Has an existing protective part (for example, an existing parapet 2 described later) extending along the outer periphery, and a cotter (for example, described later) provided on a floor surface (for example, a floor surface 3 described later) of the existing parking lot. Cotter 30), a base (for example, a mountain retaining material 11 described later) that is placed on the floor of the existing parking lot and engages with the cotter, and extends upward from the base at least from the floor A protection portion (for example, a support column 12 and a protection plate 13 described later) that extends substantially horizontally at a predetermined height position, and the cotter is a detent reinforcing bar (for example, driven into the floor surface of the existing parking lot) , a displacement preventing rebar 31) described below, the displacement-preventing And mortar or concrete that has been pouring include muscle, that consists characterized.

According to the present invention, a cotter including a reinforcing bar is formed on the floor surface of an existing parking lot, and the base is locked to the cotter.
Therefore, when the vehicle collides with the protective part, the protective part is deformed and absorbs energy, and this impact force is distributed through the base part and transmitted to the cotter, so that a shear force is generated between the lower surface of the cotter and the floor surface. Works. Since the anti-slip bar resists this shearing force, it is possible to prevent the vehicle from colliding with the existing protective part.
Also, even if the shearing reinforcing bar breaks due to shearing force and the base moves on the floor surface and collides with an existing protective part, the existing reinforcing part mitigates the impact to some extent. The shearing force applied to can be reduced.

Therefore, there is no need to dismantle the existing protective part and provide a new protective wall that can withstand a predetermined impact as in the prior art, so that the vehicle can be prevented from falling in the existing parking lot at a low cost.
In addition, since it is only necessary to drive the anti-slip reinforcing bar into the waterproof presser concrete for the floor surface of the existing parking lot, it does not impair the waterproof performance, and it is easy to disassemble the existing parking lot. Can be removed and reused.

  According to the present invention, when the vehicle collides with the protective part, the protective part is deformed and absorbs energy, and the impact force is distributed through the base and transmitted to the lower end of the existing protective part to act as a shearing force. . Therefore, since the bending moment generated at the lower end of the existing protective part can be reduced, the existing protective part can be prevented from bending outward and the vehicle can be prevented from falling. Therefore, there is no need to dismantle the existing protective part and provide a new protective wall that can withstand a predetermined impact as in the prior art, so that the vehicle can be prevented from falling in the existing parking lot at a low cost. In addition, since no construction is performed on the floor surface of the existing parking lot, the waterproof performance is not impaired, and the existing parking lot can be easily removed and transferred when dismantling.

It is a perspective view of a fall prevention structure concerning a 1st embodiment of the present invention. It is sectional drawing of the fall prevention structure which concerns on the said embodiment. It is sectional drawing of the fall prevention structure which concerns on 2nd Embodiment of this invention. It is a perspective view of the fall prevention structure concerning the 1st modification of the present invention. It is a perspective view of the fall prevention structure concerning the 2nd modification of the present invention. It is sectional drawing of the fall prevention structure which concerns on the 3rd modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a perspective view of a fall prevention structure 10 according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the fall prevention structure 10.

The fall prevention structure 10 is provided in an existing parking lot 1 that is an existing parking lot. That is, this existing parking lot 1 is a three-dimensional parking lot, and an existing parapet 2 with a chin as an existing protective part extending along the outer periphery is provided on the second and higher floors.
The fall prevention structure 10 is provided inside the existing parapet 2, that is, on the floor surface 3 on the parking space side.

  The fall prevention structure 10 includes a mountain retaining material 11 as a base having a predetermined length placed on the floor surface 3 of the existing parking lot 1, and a predetermined interval along the length direction of the mountain retaining material 11. The support column 12 provided as a protection unit, a protection plate 13 as a protection unit supported by the support column 12, and an interposition unit 14 interposed between the side surface of the mountain retaining material 11 and the existing parapet 2. And comprising.

The mountain retaining material 11 is, for example, H-300 × 300, a length of about 5 m, and a weight of about 500 kg. The H steel 20, the end plate 21 that closes both ends of the H steel 20, both flanges of the H steel 20, and And a reinforcing plate 22 fixedly welded to the web. A large number of through holes 23 for inserting bolts are formed in both flanges of the H steel 20 and the end plate 21.
This mountain retaining material 11 is arranged so that the web of H steel 20 is substantially parallel to the floor surface 3, and is fixed to the inner wall surface of the existing parapet 2 by a post-construction anchor 24 using a through hole 23. .

  The support column 12 is fixed to the upper surface of the web of the H steel 20 and extends upward, and the reinforcing plate 22 is attached directly below the support column 12.

The protection plate 13 is a guard rail having substantially the same length as the mountain retaining material 11 and is fixed to the upper end side of the support column 12. Thereby, the protective plate 13 extends substantially horizontally from the floor surface 3 at a predetermined height position.
The interposition part 14 is provided over the entire length between the side surface of the mountain retaining material 11 and the inner wall surface of the existing parapet 2. The interposition part 14 is formed by placing mortar or concrete.

According to this embodiment, there are the following effects.
(1) When the vehicle collides with the protective plate 13, the protective plate 13 and the support column 12 are deformed and absorb energy, and this impact force is distributed through the mountain retaining material 11 and the interposition part 14, and the existing parapet 2 It is transmitted to the lower end and acts as a shearing force on the lower end of the existing parapet 2. Therefore, the bending moment generated at the lower end of the existing parapet 2 can be reduced compared to the case where the impact force by the vehicle is concentrated on the upper end of the existing parapet 2 as in the prior art, so that the existing parapet 2 is bent outward. Can prevent the vehicle from falling.
Moreover, since the interposition part 14 was formed by closely filling mortar or concrete between the existing parapet 2 and the mountain retaining material 11, even if the inner wall surface of the existing parapet 2 is uneven, The integrity with the mountain retaining material 11 can be enhanced.
Furthermore, even when a large impact force is applied to the protective plate 13 by the vehicle, the interposition part 14 is destroyed before the existing parapet 2, so that the interposition part 14 is destroyed, The applied impact force can be weakened.

Therefore, it is not necessary to disassemble the existing parapet 2 and provide a new protective wall that can withstand a predetermined impact as in the prior art, so that the vehicle can be prevented from falling in the existing parking lot 1 at a low cost.
Moreover, since no construction is performed on the floor surface 3 of the existing parking lot 1, the waterproof performance is not impaired, and the existing parking lot 1 can be easily removed and diverted when dismantling.

For example, when a mountain retaining material of H-300 × 300 and 5 m in length is used, the impact force by the vehicle is about 600 mm from the floor surface, but the impact force acting on the existing parapet through the retaining material is The height is about 0 to 300 mm from the surface. Therefore, the impact force of the vehicle is applied not at the upper end of the existing parapet, but at the lower position of the existing parapet as in the past, so even if the impact force is the same size, the acting bending moment is significantly larger than before. Can be reduced.
Moreover, since the bumper width of the vehicle is about 2 m, and the mountain retaining material is about 5 m, the impact force of the vehicle can be widely dispersed, compared to the case where the vehicle directly collides with the existing parapet 2 as in the past. Thus, the portion that resists the impact force of the existing parapet 2 can be made longer.

  Moreover, since the temporary guardrail which the mountain retaining material 11, the support | pillar 12, and the protection board 13 were united is marketed, the fall prevention structure 10 can be easily constructed | assembled by utilizing this temporary guardrail which is a commercial item. .

  Further, since the reinforcing plate 22 is provided, it is possible to prevent the flange and the web of the H steel 20 from being twisted by the impact force applied to the support column 12.

[Second Embodiment]
FIG. 3 is a perspective view of a fall prevention structure 10A according to the second embodiment of the present invention.
In this embodiment, the point from which the interposition part 14 is not provided and the cotter 30 is provided differs from 1st Embodiment.
That is, the mountain retaining material 11 is arranged away from the existing parapet 2.
The cotter 30 is formed between both flanges of the mountain retaining material 11 on the floor surface 3 of the existing parking lot 1.
The cotter 30 drives a detent bar 31 into the floor surface 3 between both flanges of the retaining material 11, and then places mortar or concrete in a space surrounded by both flanges and the web of the retaining material 11. By doing so, it is formed including the non-slip bar 31. Thereby, both the flanges of the mountain retaining material 11 are disposed with the cotter 30 interposed therebetween, and the mountain retaining material 11 is locked to the side surface of the cotter 30.
In addition, the tip depth of the retaining bar 31 is stopped in the waterproof presser concrete so as not to damage the waterproof layer of the existing parking lot 1.
Further, through bolts 25 that penetrate both flanges of the mountain retaining material 11 may be provided by using the through holes 23 provided in the mountain retaining material 11.

According to this embodiment, there are the following effects.
(2) The cotter 30 including the slip reinforcing bars 31 is formed on the floor surface 3 of the existing parking lot 1, and the mountain retaining material 11 is locked to the cotter 30.
Therefore, when the vehicle collides with the protection plate 13, the protection plate 13 and the support column 12 are deformed to absorb energy, and the impact force is distributed through the mountain retaining material 11 and transmitted to the cotter 30. A shearing force acts between the lower surface and the floor surface 3. Since the anti-slip bar 31 resists this shearing force, the vehicle can be prevented from colliding with the existing parapet 2.
Moreover, even if the retaining bar 31 breaks due to the shearing force and the pile retaining material 11 moves on the floor surface 3 and collides with the existing parapet 2, the retaining bar 31 moderates the impact to some extent. The shearing force applied to the existing parapet 2 can be reduced.

Therefore, it is not necessary to disassemble the existing parapet 2 and provide a new protective wall that can withstand a predetermined impact as in the prior art, so that the vehicle can be prevented from falling in the existing parking lot 1 at a low cost.
In addition, for the floor 3 of the existing parking lot 1, it is only necessary to drive the anti-slip bar 31 into the waterproof presser concrete, so that the waterproof performance is not impaired and the existing parking lot 1 is disassembled. It can be easily removed and diverted.

Moreover, since the temporary guardrail which the mountain retaining material 11, the support | pillar 12, and the protection board 13 were united is marketed, 10A of fall prevention structures can be easily constructed | assembled by utilizing this temporary guardrail.
Further, by providing the through bolt 25, the pile retaining material 11 can be firmly fixed to the cotter 30.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described first embodiment, the mountain retaining material 11 is used as the base portion. However, the present invention is not limited to this, and as shown in FIG. You may connect the steel 40 with the connection material 41 as a base which is an angle material. In this case, the interposition part 14 is provided only between the side surface (flange surface) of the H steel 40 and the inner wall surface of the existing parapet 2.

In addition, the shape of the base is not particularly limited, and for example, an angle member 50 as a base may be used as shown in FIG.
In addition, the existing protection part is not an existing parapet 2 with a chin, but as shown in FIG. 6, the inner wall surface is a substantially vertical flat surface with a small unevenness and may be higher than the existing parapet 2 and the vehicle may get over. If the existing handrail wall 4 is low, the interposition part 14 may not be provided, and the side surface of the mountain retaining member 11 may be brought into direct contact with the existing handrail wall 4.

1 ... Existing parking lot (existing parking lot)
2 ... Existing parapet (existing protection part)
3 ... Floor surface 4 ... Existing handrail wall (existing protection part)
10, 10A, 10B, 10C, 10D ... Fall prevention structure 11 ... Mountain retaining material (base)
12 ... Post (protection part)
13 ... Protective plate (protective part)
DESCRIPTION OF SYMBOLS 14 ... Interstitial part 20 ... H steel 21 ... End plate 22 ... Reinforcement plate 23 ... Through-hole 24 ... Post-construction anchor 25 ... Through bolt 30 ... Cotter 31 ... Non-slip bar 40 ... H steel (base)
41 ... Connecting material (base)
50 ... Angle material (base)

Claims (3)

A fall prevention structure provided in an existing parking lot,
The existing parking lot has an existing protective part extending along the outer periphery,
A base placed on the floor of the existing parking lot;
A protective portion extending upward from the base portion and extending substantially horizontally at a predetermined height position from at least the floor surface;
An interposition part interposed between a side surface of the base part and the existing protection part ,
The protection part includes a support provided at predetermined intervals along the base, and a protection plate supported by the support,
The base is fixed to the existing protection part by a post-construction anchor in the vicinity of the position where the support column is provided . A fall prevention structure provided in an existing parking lot,
The existing parking lot has an existing protective part extending along the outer periphery,
A base placed on the floor of the existing parking lot;
A protective portion extending upward from the base portion and extending substantially horizontally at a predetermined height position from at least the floor surface,
The protection part includes a support provided at predetermined intervals along the base, and a protection plate supported by the support,
The side surface of the base is in contact with the existing protective part ,
The base is fixed to the existing protection part by a post-construction anchor in the vicinity of the position where the support column is provided . A fall prevention structure provided in an existing parking lot,
The existing parking lot has an existing protective part extending along the outer periphery,
A cotter provided on the floor of the existing parking lot;
A base that is placed on the floor of the existing parking lot and engages the cotter;
A protective portion extending upward from the base portion and extending substantially horizontally at a predetermined height position from at least the floor surface,
The cotter is fall prevention structure, characterized the displacement preventing rebar implanted into the floor of the existing parking, and mortar or concrete that has been pouring comprising said displacement-preventing reinforcement, in that it consists of.

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