JP2011190679A - Complex facility of concrete retaining wall, guard fence and wheel guiding fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a complex facility of a concrete retaining wall, a guide fence and a wheel guiding fence, which is effective for both small and large vehicles and is surely improved in a guiding function of a collision vehicle. <P>SOLUTION: The complex facility includes: a concrete retaining wall 6 having a hole part 5 for embedding a support 4 at a top part 3; the support 4 erected in the hole part 5; a main beam 7 horizontally installed inside a road 2 of the support 4; and a wheel guide fence 8 disposed below the main beam 7. The wheel guide fence 8 is disposed along the curve formed of the main beam 7 at a road curved section, and bendably bonded at the center of the support 4. The interval between the top part of the concrete retaining wall 6 and the wheel guide fence 8 and the interval between the wheel guide fence 8 and the main beam 7 lower end are each set to 250 mm or less, while the distance between the top part 3 of the concrete retaining wall 6 and the top end of the main beam 7 is set to 650 mm or more. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a complex facility of a concrete retaining wall, a protective fence, and a wheel guide fence.

  Conventionally, concrete retaining walls and protective fences have been studied individually. In recent years, it is known that the performance of the protective fence can be improved by providing a wheel guide fence on the protective fence, but this has also been studied individually.

  As an example of a conventional wheel guide fence, a sidewalk block having a height of about 20 cm (see reference numeral 14 in FIG. 2) is provided along the road inside a protective fence called a guard rail standing on the side of the road. There is an example. The purpose of this sidewalk block is to guide a small vehicle of the size of a passenger car to the inside of the road when the course is wrong, but once the vehicle gets on the sidewalk block, the front wheels are the main beam of the guardrail. A case in which it enters and fits under the corrugated steel material, and at that time or when the tire collides with the column, the front wheel is torn off from the vehicle body, causing excessive gravity acceleration to the occupant and causing a serious accident, etc. was there.

  Therefore, the present inventor, as shown in Japanese Patent Application Laid-Open No. 2005-201020 and Design Registration No. 1214878, the collision vehicle is stopped with respect to the support fence post, and an excessive gravitational acceleration is given to the occupant. We proposed a vehicle guidance block that can be greatly tilted to prevent serious accidents. This is characterized in that the vehicle tire or foil is received by a deformable cushioning material disposed along the traveling direction of the road inside the support column, and the vehicle is reflected to the inside of the road. This inflection cushioning material is located under the beam of a normal guardrail, and it is made to fix both ends with respect to a support | pillar. The design registration No. 1214878 discloses an example of a curb block used in combination with a guardrail.

  The protective fence installed on the concrete retaining wall and the protective fence installed in the embankment of a general road side belt are the loads that the support receives when a vehicle collides with the protective fence due to the installation base conditions of the protective fence support. The conditions are also very different. That is, in the support column in which the support column is fixed in concrete, the collision load acts instantaneously and intensively as a shearing force on the fixed portion at the upper end of the retaining wall. On the other hand, the collision load received by the protective fence column embedded in the soil is assisted by the buffering effect of the soil, and the instantaneous collision load tends to be received relatively flexibly.

  For this reason, it has been said that the safety performance of the protective fence can be ensured by dividing it into “when embedding the struts in concrete” and “when embedding the struts in the soil”.

  However, the inventors found out from the results of actual collision experiments that the safety performance of the protective fence cannot be satisfied by this response alone.

  In other words, a deformable protective fence specified as a concrete installation type is installed on the concrete retaining wall, and a performance confirmation test is performed according to the vehicle safety fence performance confirmation test method stipulated by the Japan Road Association in its standards and explanation As a result, the fact that the performance standard set by this was not satisfied was discovered.

  Specifically, since the wheel guide block and curb block proposed in the past are designed to be applicable to existing guardrails, it is necessary to make a wheel guide block of an appropriate size according to the deviation of the strut spacing. There are problems such as troublesomeness, a step, a lack of strength of existing struts, and a case where it cannot be applied depending on the side of the road. Especially for guardrails installed along the retaining wall, the retaining wall structure varies, so that not only the design effect does not appear, but also there is a problem in the strut strength and consequently the retaining wall strength. There are cases where the wheel guide block does not function sufficiently, for example, it is difficult to install or the retaining wall is damaged due to insufficient strength or collapses with the support column.

  On the other hand, the inventors of the present application have learned and published that the numerical specifications shown in JP 2002-322622 A, in particular, the beam interval of the wood beams should not exceed 250 mm in the study of the wooden guard fence. is doing. Since the tire radius of a small vehicle is about 50 cm, if it is wider than 250 mm, which is half of that (corresponding to the diameter of the tire wheel), the tire hole will sink, tearing the wood beam and guiding the tire to the column, and the vehicle to the column Because it crashes.

  Japanese Patent Laid-Open No. 2002-322622 relates to a wooden guard fence, but this numerical specification is also applicable to a general guardrail having a corrugated steel material as a main beam.

  However, when a horizontal beam is added to a general guard rail so as not to provide an interval exceeding 250 mm, it is meaningless to weaken the strength, and if the horizontal beam strength is increased, it will not be bent at the time of collision. There was a problem that required functions could not be realized. Further, even if a horizontal rail is simply provided, if the strength of the existing support is weak, the support may be greatly tilted and the vehicle may be deviated from the vehicle.

Japanese Patent Laying-Open No. 2005-201020, page 1, FIG. Design Registration No. 1214878 JP 2002-322622 A, page 1, FIG.

  In view of the above-mentioned background art, the present invention is designed for a small vehicle and a large vehicle by designing a concrete retaining wall, a protective fence, and a wheel guide fence that have been separately manufactured and used in combination. It is an object of the present invention to provide a complex facility of a concrete retaining wall, a protective fence, and a wheel guide fence that are both effective and that can reliably improve the guidance function of a collision vehicle.

  In addition, a wheel guide fence that replaces the curb block and the idea that the beam interval is less than 250 mm are incorporated, and even if a small vehicle collides, its tires are torn off, or the occupant receives excessive gravitational acceleration due to a striking collision, leading to a serious accident. The purpose is to provide a new complex facility with a combination of a concrete retaining wall, a protective fence and a vehicle guide fence.

  In order to solve the above problems, the composite facility of the concrete retaining wall, the protective fence, and the wheel guide fence according to the present invention (hereinafter simply referred to as the composite facility) A concrete retaining wall provided with a plurality of holes, a column erecting in the hole, a main beam laid horizontally inside the road of the column, and a wheel guide fence disposed below the main beam. The main beam has a strength to reflect the collision vehicle to the inside of the road, and the wheel guide fence has a mode in which an inner end portion of the road does not protrude from an inner end portion of the main beam. And one end or the center thereof is constrained by the column and is not constrained by the top of the concrete retaining wall, and is bent in the middle of the column in the event of a collision and deformed in conjunction with the deformation of the main beam. Configured to guide the wheel Is arranged along the curve formed by the main beam at the road curved portion, and is relayed to bend at the center position of the column, and the distance between the top of the concrete retaining wall and the wheel guide fence, The distance between the vehicle guide fence and the lower end of the main beam is 250 mm or less, and the distance from the top of the concrete retaining wall to the uppermost end of the main beam is 650 mm or more.

  The complex facility according to claim 1 includes a case where the wheel guide fence is made of a steel material and a case where the wheel guide fence is made of a concrete block. As a case made of steel, there are a case of being made of a steel plate and a case of being made of a combination of round or square steel pipes or wires. In any case, the road inner end portion is located below the main beam in a form that does not protrude from the road inner end portion of the main beam, and one end or the center of the road is constrained by the column and the It is not restricted by the top part of the concrete retaining wall, but is required to be bent in the middle of the column in the event of a collision and deformed in conjunction with the deformation of the main beam. Therefore, a high-strength steel pipe cannot be installed as a horizontal rail as it is, but it is required to bend at the time of collision and to be deformed in conjunction with the main beam.

  In the case of a concrete block (this wheel guide fence is also called a wheel guide block), if one end of the wheel guide block is fixed around the column, the vehicle collision will abut the tire and bend in the middle. Since it is normal, it can be easily implemented without adding special measures and conditions. Thus, since the wheel guide block itself is naturally bent, it is necessary to make the top of the concrete retaining wall slidable so that the bending can be performed freely.

In the road bending portion, the main beam is provided along a curved surface. In this case, it is economically disadvantageous to manufacture wheel guide fences made of concrete blocks or the like together with various curved surfaces. Therefore, in the present invention, although it is arranged along the main beam, it is decided to be relayed so that it can be bent at the center position. Thereby, it can comprise so that it can bend along a main beam in the center of a support | pillar.
Regarding the beam interval and height, the distance between the top of the concrete retaining wall and the lower end of the wheel guide fence and the distance between the wheel guide fence and the lower end of the main beam are both 250 mm or less. Since the distance to the top end of the main beam with respect to the top is 650 mm or more, it can be used for large vehicles with a tire diameter of 1 m and small vehicles with a tire diameter of 500 to 600 mm, and the tires are guided, hidden, and fitted between the beams. There is nothing.

  Although it is not well known in general, when the tires get in between the beams, there are cases where the tire stops on the spot and when it slides in the direction of travel, it crashes into the strut. It may lead to a serious accident. In the present invention, these are prevented, and the collision vehicle can be safely guided and reflected to the inside of the road.

  Not giving excessive accelerating acceleration to the occupant means that the protective fence and concrete retaining wall will not be momentarily overloaded, and that the safety fence installed on the concrete retaining wall will be safe. It is possible to improve the property and protect the substructure such as the retaining wall.

  The struts and concrete retaining walls are designed in one piece and are combined together. Therefore, both the strut strength and the concrete retaining wall can have the required strength. Since excessive force is not applied, there is no need to design extra strength. Specifically, although the main reinforcing bar corresponding to the collision is added to the concrete retaining wall in addition to the reinforcing bar corresponding to the earth pressure, the amount of the main reinforcing bar can be minimized. The connection with adjacent concrete retaining walls is also done completely. As the support, for example, a steel pipe pile having a diameter of 114.3 mm is used, but a strength that does not incline more than necessary and is not damaged by a collision experiment is maintained. Since they are linked, installation standards can be satisfied with certainty.

  Further, in the complex facility of the present invention, when the wheel guide fence is made of concrete, the wheel guide block is constrained at one end or the center by the support column and not by the top of the concrete retaining wall, It is configured to be deformed in conjunction with the deformation of the main beam while being bent in the middle of the column at the time of collision and sliding on the top of the concrete retaining wall, and the wheel guide fence is a road curved portion, It is arranged along the curve formed by the main beam, and is relayed at the center position of the column so that it can be bent, and the lower end of the wheel guide block on the road is positioned inside the top of the concrete retaining wall to ensure the amount of sliding. Thus, the sliding is made smooth.

When the wheel guide block used in the present invention is applied to an existing guardrail, the ground below the main beam is soil, concrete, or asphalt, and its sliding performance is unstable. However, in the present invention, it is possible to appropriately determine the specifications of sliding on the top of the concrete retaining wall, and to ensure the sliding of the wheel guide block at the time of a vehicle collision, satisfying the performance. , Collision vehicles can be safely guided.
In the road bending portion, the main beam is provided along a curved surface. In this case, it is economically disadvantageous to manufacture wheel guide fences made of concrete blocks or the like together with various curved surfaces. Therefore, in the present invention, although it is arranged along the main beam, it is decided to be relayed so that it can be bent at the center position. Thereby, it can comprise so that it can bend along a main beam in the center of a support | pillar.

  The wheel guide block has a lower end at a position where the inner end of the road does not protrude from the top of the concrete retaining wall, and the upper end of the wheel guide block is constant from the inner end of the column to the inner side of the road at a position where the upper end is deviated from the position. It is characterized by overhanging only the dimensions. Thus, the tire is not punctured at the sharp portion, and it can be cleanly designed, and can be smoothly guided to the main beam of the collision vehicle.

  According to the first aspect of the present invention, the concrete retaining wall, the support column, the main beam, and the wheel guide fence are combined and combined, and the wheel guide fence is not protruded from the road inner end portion of the main beam. Positioned below the main beam, one end or the center of the beam is constrained by the column and not constrained by the top of the concrete retaining wall. Since it is configured to be deformed, the functions of each member can be fully demonstrated and organically supported with each other, and all necessary conditions can be satisfied without interfering with the function of the wheel guide fence in particular. . Since excessive power acceleration is not given to the vehicle, the reaction force to the column is reduced and the retaining wall can be prevented from being broken.

  In addition, the distance between the top of the concrete retaining wall and the wheel guide fence is set to 250 mm or less between the wheel guide fence and the lower end of the main beam, and the height of the top end of the top is 650 mm or more. Therefore, tires or foils of small vehicles (of course large vehicles) are not hidden between the wheel guide fence and the beam, and the collision vehicle can be safely guided by the function of the wheel guide fence. Can be reflected.

  In the complex facility according to claim 2, the wheel guide fence is constrained at one end or the center thereof to the column and not to the top of the concrete retaining wall, and is folded in the middle of the column at the time of collision to Since it is configured to be deformed in conjunction with the deformation and is slid at the top of the concrete retaining wall, the sliding can be surely performed and the function of the wheel guide block can be fully exhibited.

  Since both the wheel guide block and the concrete retaining wall are made of concrete, it is possible to design the wheel guide block and the concrete retaining wall integrally, and it is possible to improve the function by performing optimal design together. If the inner lower end of the wheel guide block is positioned inside the top of the concrete retaining wall, and the upper end of the wheel guiding block is designed to be eccentric from the inner position of the main beam toward the inner top of the concrete retaining wall The tire can be guided smoothly to the main beam.

  3. The complex facility according to claim 1, wherein the wheel guide fence (including a wheel guide block) is arranged along a curve formed by the main beam at a curved portion of the road, and is flexibly relayed at a column center position. be able to. Since the relay is relayed so as to be able to bend, it is possible to cope with a collision and bend according to the deformation of the main beam to smoothly guide the collision vehicle.

It is side explanatory drawing of the complex facility which concerns on one Embodiment of this invention. It is side surface sectional drawing which expands and shows the principal part of the complex facility shown in FIG. It is explanatory drawing which shows the fixing method to the support | pillar of a wheel guidance block, (a) A figure is the front view seen from the road inner side, (b) A figure is a top view, (c) A figure is a rear view. It is a top view which shows the connection system in the curve part of a wheel guidance block. It is a perspective view which shows other embodiment of a wheel guidance block. It is a perspective view which shows other embodiment of a wheel guidance block.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory side view of a complex facility according to an embodiment of the present invention, FIG. 2 is a partially enlarged side sectional view showing the main part of the complex facility shown in FIG. 1, and FIG. (A) is a front view seen from the inside of the road, (b) is a plan view thereof, and (c) is a rear view of FIG. (A).

  As shown in FIG. 1, a complex facility 1 according to an embodiment of the present invention is a facility provided along a road side portion of a road 2, and includes a ceiling portion 3 and a hole portion 5 for embedding a column 4. A concrete retaining wall 6, a column 4 erected in the hole 5, a main beam 7 made of steel plate laid horizontally inside the road 2 of the column 4, and a wheel disposed below the main beam 7 A guidance block 8 is provided.

  On the road 2, a tire TR1 for a small vehicle and a tire TR2 for a large vehicle are shown together. The figure shows the front beam colliding with the main beam 7 only for the purpose of showing the tire diameter, but in actuality the vehicle travels from the front to the back of the page in the figure and collides from an oblique direction. To do.

Details are shown in FIG. The L-shaped concrete retaining wall 6 is installed with its top 3 matched to the road surface height of the road 2. The L-type concrete retaining wall 6 is provided with a rebar 9 corresponding to earth pressure and a rebar 10 corresponding to a collision. “Collision response” means that when the vehicle 11 collides with the main beam 7, the column 4 receives the load F, and the concrete retaining wall 6 itself is not damaged and continues to support the column 4. The load F, when embedding strut 4 in the concrete, are defined the gravitational acceleration small vehicle undergoes a 120m ^/ s 2 ^/ 10ms (2004 March, fences installation standards, page 16). In order to improve the durability, the L-type concrete retaining walls 6 are securely connected to each other. Finish the top 3 smoothly. The width of the top 3 not only mounts the wheel guide block 8 but also the sliding amount SL (see FIG. 3B) with the expectation that it slides in the road outer direction (leftward in the figure). Put.

  The road inner end of the wheel guide block 8 should not protrude from the top 3. A hole 12 shown below the hole 5 is a drain hole for preventing freezing. In cold districts, water accumulates in the hole 5 and causes cracks to rust the rebars 9 and 10, shortening the service life. However, since the water is drained through the drain holes 12, cracks due to freezing can be prevented and durability can be improved. . In FIG. 2, a reference arrow 13 shown on the inside of the road 2 is an arrangement position of the conventional wheel guide block 14.

  The strut 4 is, for example, a steel pipe having a diameter of 114.3 mm, and is used that has been strengthened by filling mortar with high pressure therein. It is inserted into a hole 5 provided in the top 3 of the concrete retaining wall 6, and the periphery is filled with a caulking material such as mortar or asphalt and fixed.

  The main beam 7 is installed with a required block-out BK (for example, 83 mm) via a bracket 14A. A height H1 of the wheel guide block 8 is 250 mm, and a spatial distance H2 of 250 mm or less is placed thereon, and the wheel guide block 8 is arranged thereon. Accordingly, the total height is 850 mm if the width of the main beam 7 is 350 mm. The clearance H2 is set to 250 mm, which corresponds to the tire radius of the small vehicle TR1 and is a condition for preventing the tire from being completely submerged between the wheel guide block 8 and the main beam 7.

  Here, when the conventional wheel guide block 14 is evaluated, when the small vehicle TR1 traveling diagonally forward gets over the wheel guide block 14, the tires TR1 and TR2 are fitted between the block 14 and the support column 4, and the tire is attached to the support column. It was led to a serious accident such as the tire being torn off.

  Here, in the present invention, the wheel guide block 8 is located at a position P where the lower end of the block 8 does not protrude from the top 3 at the inner end of the road 2, and the upper end point of the wheel guide block 8 is a position that is less than the P point. 4 is a position protruding from the inner end of the road 4 to the inside of the road by a dimension n (n> 0). Further, the outermost end slightly protrudes beyond the support column 4 and leaves a sliding distance SL with the top 3. Naturally, a necessary amount of reinforcing bars are incorporated in the concrete of the wheel guide block 8.

  As shown in FIG. 3, the wheel guide block 8 has a semi-U-shaped grip 15 that is open to the outside of the road 2 in order to engage both ends of the wheel guide block 8 with the column 4. The wheel guide blocks 8 are pressed against the pair of support columns 4 from the inside of the road, and the adjacent wheel guide blocks 8 are gripped by the bolts 17 using the joining plates 16 from the back side (the outside of the road). In FIG. 3B, the middle of the wheel guide block 8 is bent at the time of a collision, and the situation where the wheel slides on the top 3 by a distance SL is indicated by a broken line. A broken line 7 indicates bending due to the collision of the main beam 7. Therefore, the wheel guide block 8 can be bent in conjunction with the main beam 7.

  FIG. 4 shows a connection method for the road curve portion. A split-type wheel guide block 8H is arranged along the curve formed by the main beam 7, and the middle of the block 8H is connected by a bolt using a joint plate 18. When the lower structure of the concrete retaining wall 6 at the time of a vehicle collision has a relatively small radius curve, a guide block having a space surrounding the column 4 near the center is used, and the guide block is connected near the middle of the column 4 By doing so, it is possible to obtain a linear shape synchronized with the curve of the main beam 7 of the protective fence. The edge part 19 is destroyed appropriately.

  The operation of the complex facility 1 of the present invention in the configuration shown in FIGS.

  First, in FIG. 1 and FIG. 2, the complex facility 1 is installed with good scenery. Since the space H2 is provided, the visibility is also good. Therefore, it is assumed that the vehicles TR1 and TR2 have collided at a speed (for example, 60 km in the case of a small vehicle) and an approach angle of 15 ° determined by the protective fence installation standard. Since the vehicle body is made of sheet metal, the front of the vehicle including the bumper portion is recessed, and the tires TR1 and TR2 directly contact the wheel guide block 8 and the main beam 7.

  According to the complex facility 1 of the present invention, the configuration shown in FIGS. 1 and 2, the collision tires TR <b> 1 and TR <b> 2 strike the main beam 7 and the wheel guide block 8 almost simultaneously. Further, since the upper end point of the block 8 protrudes inward from the support column 4 by a distance n while keeping the upper end point from the lower end point P, the front surface of the wheel guide block 8 is entirely on the tires TR1 and TR2. Hit.

  Then, 0. During several seconds, the vehicles TR1 and TR2 travel and try to get into the weakest point of the main beam 7, that is, the intermediate point. The state at this time is shown in FIG. The main beam 7 is pushed out of the road 2, and the center of the wheel guide block 8 is bent along with this, and the vehicle acts to push out further. At this time, the vehicles TR1 and TR2, and the wheel guide block 8 and the main beam 7 are in a state of being compared. However, since the dimension of the space H2 is set to 250 mm or less at this moment, it is impossible for the tires TR1 and TR2, particularly the tire TR1 of a small vehicle, to sink into the space H2. Eventually, the vehicles TR1 and TR2 are reflected to the inside of the road 2 in comparison with the push comparison.

  In the above collision, the wheel guide block 8 bends as shown in FIG. 3B, but its end portion does not come off the support column 4. This is because the ends of the wheel guide blocks 8 adjacent to each other are supported by the support column 4 and are joined by the joining plate 16. The reason for not joining inside the road is to allow the middle part to bend freely.

In the above embodiment, an example in which the center of the main beam 7 is recessed by several centimeters to 10 centimeters is shown, but the collision vehicles TR1 and TR2 may hit the column 4 and be reflected as they are. According to the experimental example, the collision vehicle was smoothly separated at 60% or more of the collision speed, and the collision marks remained in the wheel guide block 8 and the main beam 7 respectively, but there was a margin until the protection fence was renewed. In the comparative experiment, in the case where the wheel guide block 8 was not provided, the tires were torn off or the struts were tilted, and there was a significant difference in action and effect. Gravitational acceleration applied to the vehicle occupant even ^90m / s 2 / 10ms or less, both were able to clear the reference. Since there is little impact, there is little bend to the set point of the support column 4, and the concrete retaining wall is not damaged. The greatest feature of the present invention is that these actions and effects can be obtained with certainty.

  4, the wheel guide block 8H is arranged along the main beam 7. When a load F is applied at the center, the joint plate 18 bends following the main beam 7, and the lower surface of the block is made of concrete retaining wall. You can slide up.

  Although the example which comprised the wheel guidance fence with the concrete block was shown in the above description, it can also comprise with an iron material. However, the wheel guide fence needs to be bent as the main beam bends. For this purpose, it is necessary to have a design that exhibits an appropriate elongation at the supporting column fixing portion with an appropriate strength that does not cause damage due to a collision. As an example of this, there is an example in which one or two stretchable wires are stretched and a corrugated member is pasted on the surface thereof. A single wire gives a linear tension to the vehicle side. Even in this case, the wheel guide fence is installed at a position where no space exceeding 25 cm is formed between the road surface and the lower end of the main beam 7. Further, the block-out amount is a position that does not recede from the surface of the column 4 and does not protrude beyond the front surface of the beam 7. Even when the wheel guide fence is protruded from the surface of the support column 4 to the passage side due to unavoidable circumstances, the amount is desirably about 5 cm or less, and the amount exceeding 10 cm is not preferable. Further, even when the vehicle is installed backward from the passage due to the width of the traffic zone, the surface of the wheel guide fence should not be retracted from the surface of the support column 4. That is, n> 0.

  FIG. 5 is a perspective view showing another configuration example of the wheel guide block 8A. The illustrated wheel guide block 8A is an example applied to a column having a support interval of 4 m span. The road side edge 20 has a lower width D1 of 150 mm and an upper width D2 of 80 mm, and is configured in a plate shape. The block thickness D3 at the upper end is 120 mm. Except for the form that prevents the movement of the tires TR1 and TR2, various designs may be applied to the surface.

  FIG. 6 shows another example of the wheel guide block 8B. In this example, a road surface drain port 21, a design window 22, and a flower pot 23 are provided on the upper surface. The provision of the shallow concave groove 24 on the front surface is a consideration for removing a portion occupied exclusively on the road side. In order to enhance visibility from the vehicle, it is better to take an opening such as the design window 22 as wide as possible. By applying such a design, it is possible to add moisture to the monotonous road landscape.

  The present invention is not limited to the embodiment described above, and appropriate design changes can be made without departing from the gist of the present invention, and can be implemented in various aspects.

DESCRIPTION OF SYMBOLS 1 Complex facilities 2 Road 3 Top part 4 Prop 5 Hole 6 Concrete retaining wall 7 Main beam 8, 8H, 8A, 8B Wheel guidance fence (wheel guidance block)
9, 10 Reinforcing bar 11 Vehicle 12 Drain hole 13 Reference arrow indicating conventional product installation position 14 Conventional block 15 Grasp part 16 Joint plate 17 Bolt 18 Joint plate 19 Edge part 20 Road side edge 21 Drainage port 22 Design window 23 Flower pot 24 Shallow groove TR1 Small vehicle (its tire)
TR2 Large vehicle (its tire)
SL sliding amount

Claims (3)

A concrete retaining wall provided with a hole for embedding a column in the top, a column erecting in the hole, a main beam laid horizontally inside the road of the column, and disposed below the main beam Wheel guide rail
The main beam has an intensity to reflect the collision vehicle to the inside of the road,
The wheel guide fence is positioned below the main beam in such a manner that the road inner end portion does not protrude from the road inner end portion of the main beam. It is not constrained to the top of the wall, and is configured to be deformed in conjunction with the deformation of the main beam by being bent in the middle of the column at the time of collision,
The wheel guide fence is arranged along a curve formed by the main beam at a road curved portion, and is relayed so as to be bent at a center position of the column.
The distance between the top of the concrete retaining wall and the wheel guide fence and the distance between the vehicle guide fence and the lower end of the main beam are both 250 mm or less, and the main wall relative to the top of the concrete retaining wall. The distance to the top end of the beam was 650 mm or more,
A complex facility consisting of a concrete retaining wall, a protective fence and a wheel guide fence. A concrete retaining wall provided with a hole for embedding a column in the top, a column that is erected in the hole, a main beam that is laid across the road inside the column, and the concrete below the main beam Consists of a wheel guide fence placed on the top of the retaining wall,
The main beam has an intensity to reflect the collision vehicle to the inside of the road,
One end or the center of the wheel guide fence is constrained by the support column and is not constrained by the top portion of the concrete retaining wall. It is configured to deform in conjunction with the deformation of the main beam while sliding,
The wheel guide fence is arranged along a curve formed by the main beam at a road curved portion, and is relayed so as to be bent at a center position of the column.
The configuration is to smoothen the sliding by securing the amount of sliding by positioning the lower inner side of the road of the wheel guide fence inside the top of the concrete retaining wall,
A complex facility consisting of a concrete retaining wall, a protective fence and a wheel guide fence. It is a complex facility of the concrete retaining wall according to claim 2, a guard fence and a wheel guide fence,
The wheel guide fence has a lower end at a position where the inner end of the road does not protrude from the top of the concrete retaining wall, and the upper end of the wheel guide fence is constant from the inner end of the column to the inside of the road at a position where it is lower Projecting only the dimensions,
A complex facility consisting of a concrete retaining wall, a protective fence and a wheel guide fence.

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