JP2002322622A - Wooden protection fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wooden protection fence having good appearance, high shock absorbing function and high performance. SOLUTION: This wooden protection fence is constituted like a fence by a plurality of struts erected at designated spaces on a road side part of a vehicle passing area and a plurality of wooden shock absorbing materials laid at designated spaces vertically on the front of the ground part of the respective struts. The contact or collision of the vehicle is received from the front side to make the behavior of the vehicle adaptable to safety standard.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden fence to be installed on a bridge, a road such as a road, a sidewalk, a parking lot, a park or other promenade. Specifically, a plurality of pillars erected at predetermined intervals on the road side of the vehicle traffic area, and a plurality of wooden cushioning materials (also referred to as wood beams) horizontally suspended at predetermined intervals above and below the front surface of the ground of each pillar. ), Which can receive the contact or collision of the vehicle from the front side, conform the behavior of the vehicle to safety standards, and provide a good landscape and people and vehicles and environmentally friendly wooden protection. About fences.

[0002]

2. Description of the Related Art Guard fences are commonly called guardrails.
BACKGROUND ART Steel protective fences using corrugated steel rails, reinforcing pipes, wire cables, and the like, and wooden protective fences using wood as a cushioning material are known. (Japanese Patent No. 2974949, Patent No. 2
958254). Among them, the steel protective fence is also called a deformable protective fence, and is expected to have a function of suppressing runaway of a vehicle or the like by absorbing collision load energy by deformation of the steel rail. However, this steel guard fence
Since it is intended to absorb the collision load energy only by the deformation of the steel rail, the amount of deformation due to the collision load is large, and in mountainous areas, etc., there are many cases where the guardrail is knocked down and the vehicle falls under the road, etc. Insufficient fall prevention function measures.

In order to solve these problems, the present inventor has disclosed in Japanese Patent Nos. 2747949 and 295825.
As described in Japanese Unexamined Patent Publication No. 4 (1993), a wooden protective fence having excellent scenic properties and effectively utilizing wood, which is a material with a reduced environmental load, was developed, and a protective fence with an excellent fall prevention function was provided.

[0004]

After the development of the above-mentioned wooden protective fence, the "Japan Federation of Road Associations" revised the "standards for installing protective fences" and demanded further safety. According to this new safety standard (for example, the type of protection fence type “B”), an ordinary passenger car with a mass of about 1.0 ton has a collision speed of 60k.
m / h, when the vehicle collides with the protective fence at a collision angle of 20 degrees with the protective fence, the 25 ton heavy truck also has a collision speed of 30
When the vehicle collides with the protective fence at km / h and at a collision angle of 15 degrees, the departure speed is 60% or more of the collision speed as the behavior of the vehicle after collision (same for passenger cars and cargo). It is required to be within 60%.

[0005] The allowable magnitude (acceleration g) of the impact received by the passenger car is within about 10 g (regulated only for the passenger car). When it is installed, the distance (entering stroke) where the pillar can fall over the road is 1.1 m or less. When it is installed on concrete, the approaching stroke is 0.3 m or less. It is required that members of the protective fence do not scatter due to impact.

[0006] However, in the conventional wooden protective fences, although the suitability of these standards is tentatively shown, depending on the bad conditions exceeding the standards, a vehicle colliding with the protective fence bites into the protective fence immediately after the collision and is stopped suddenly. Showing trends,
There is room for improvement in the impact acceleration that a passenger car receives during a collision and the departure speed.

Further, a 25 ton heavy truck has a collision speed of 3
In the case of a collision at 0 km / h and a collision angle of 15 degrees, the inclination of the column due to the collision load becomes large, and there is a tendency that breakage occurs at the fixed portion between the column and the wooden cushioning material. It has been desired to improve the position of the leg protruding from below, the mounting position of the cushioning material, and the like.

In view of the above, the present invention is based on the premise that it is a wooden protective fence which is excellent in scenery and effectively utilizes wood, which is a material with a reduced environmental load, and is occupied by passengers and vehicles at the time of collision. It is an object of the present invention to provide a wooden fence that not only satisfies the protection fence setting standards but also ensures further safety by enhancing the function of mitigating impact.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a support body and a mounting structure thereof, a support structure of the support body underground, a timber beam mounted on the support and a mounting structure thereof. As a result of repeatedly performing various collision experiments while changing the conditions described above, a wooden protective fence as described in the claims was completed. In the crash test, the specifications of the beam are changed, the beam strength, its deformability, acceleration, vehicle behavior, departure speed, departure angle, scattering of members, etc. This was performed using

According to the present invention, there are provided a plurality of pillars erected at predetermined intervals on a road side portion of a vehicle traffic area, and a plurality of wooden cushioning members horizontally suspended at predetermined intervals above and below the ground portion of each pillar. A wooden protection fence configured to have a fence shape, receive contact or collision of the vehicle from the front side, and adapt the behavior of the vehicle to safety standards, comprising at least two wood beams and a wood beam mounting part. A plurality of concrete strut above-ground portions provided on the road side, rigid legs provided on the lower surface of the strut above-ground portion, and a pedestal block with an aperture buried near the ground surface,
It is buried underground through the opening of the pedestal block, and is provided with a steel pipe pile that accommodates a leg at the top and is fixed with mortar.

[0011] The column ground portion is mounted on a pedestal block buried near the ground surface. When a collision load is applied to the column ground portion, the rotation moment of the column accompanying the column is pulled out through the pedestal block. Converted to force. The legs are not pulled out easily because they are fixed via mortar in the steel pipe pile. Therefore, the main column structure is extremely tough against a collision load.

If the inner surface of the steel pipe pile is roughened or provided with projections, the legs can be securely fixed in the steel pipe pile. Further, the legs do not rotate in the steel pipe pile, and can securely support the wood beam attached thereto.

[0013] If the pedestal block has an area at least twice as large as the bottom area of the above-ground portion of the support and the opening is eccentric from the center axis of the above-ground portion of the support toward the road, the above-ground portion of the support is stable. And is placed on a pedestal block, and the rotational force can be reliably converted to a pull-out force. In addition, since the aperture is eccentric from the center of the ground to the road, the pulling force itself can be reduced.

In addition, the wooden protective fence of the present invention is provided on at least two concrete beams provided with at least two wood beams, a wood beam attachment portion on the road side, and a lower surface of the support portion. It is characterized by comprising a rigid leg, and a leg supporting mechanism with a concrete retaining wall having a leg fixing hole at the top for accommodating the leg and fixing the leg with a mortar.

Since the legs are accommodated in the mortar in the leg fixing holes provided at the top of the concrete retaining wall, the columns can be easily and accurately installed on the concrete retaining wall. To show the installation work, the mortar is filled into the fixing holes of the concrete retaining wall, and the legs are inserted before the mortar is set.
The support is fixed with the mortar hardening with the installation.
If the center axis of the leg is eccentric to the road side from the center axis of the bottom surface of the support, the pulling force can be reduced by moving the point of application of the pulling force away from the rotation center point,
Further, a tough support structure can be obtained. In the present invention, the above-mentioned pedestal block is unnecessary, but the top of the concrete retaining wall plays its role.

If the upper area of the leg occupies 20 to 35% of the bottom area of the above-ground portion of the column, the pull-out force can be received in a sufficiently wide area, and is constituted by a reinforcing bar or the like. The leg can be configured to easily withstand the pulling force.

Further, the wooden guard fence of the present invention comprises a bracket having at least two wood beams, a support made of a steel pipe having an integrated ground portion and an underground buried portion, and a wood beam mounting portion on the road portion on the ground portion. A pressure receiving plate substantially parallel to the road is provided near the surface of the underground buried portion. Concrete or mortar is filled inside at least 150 nm above and below the road surface of the steel pipe support.

By installing the pressure receiving plate, a part of the collision load can be reduced, the rotation of the column can be prevented, and the wood beam can be prevented from being damaged due to a thread cut or the like. In the mortar filling of the steel pipe support, the rigidity based on the road surface can be increased, and ordinary steel pipes can sufficiently withstand the rotational moment.

When the underground portion of the column is a steel pipe pile or a steel tube column, the outer diameter of the column is set to 135 nm or more. When the length is 1.8 m or more, it is possible to prevent a stress from being concentrated on the road shoulder, and to provide a tough structure in which both the pillar and the road shoulder are not damaged.

The wooden protective fence of the present invention accommodates at least two wood beams, a plurality of steel pipe posts provided with brackets having wood beam attachment portions on the road side, and a lower portion of the steel pipe posts and is fixed with mortar. And a column support mechanism with a concrete retaining wall having a column fixing hole at the top. The bracket is desirably made of a deformable material in order to enhance the cushioning effect. By fixing the lower part of the steel pipe support with mortar in the support fixing hole provided at the top of the concrete retaining wall, a strong support structure can be obtained.

The wood beam mounting portion of the column has a semicircular cross section, and a plurality of projections are provided on the inner surface. The projections are mainly for reducing the collision load. When a collision load is applied to the front surface of the wood beam, the protrusion located on the back surface bites into the back surface of the wood beam. Thereby, the collision load is greatly reduced due to the relationship between the minute motion space and the biting force. In addition, durability improves with improvement in drainage.

The timber beam is fixed to the support column with a U-shaped connecting bolt through a mounting hole in both ends of the timber beam in the radial direction and a horizontal mounting hole on the back side of the timber beam mounting portion of the support column. Can be. The wooden beams fenced from the left and right are fixed to each other with U-shaped connecting bolts, so that the three members consisting of the strut and the pair of wooden beams can be integrated, and the wooden fence has strong durability in both collision and tension. Can be done.

The U-shaped connecting bolt can be composed of a combination of two L-shaped bolts which are connected to each other via a nut so as to be able to expand and contract. In order to connect with each other via the mounting hole provided on the pillar and the mounting hole provided on the wood beam,
A nut is attached to one L-shaped bolt and inserted into the mounting hole of the column, and the other L-shaped bolt is inserted from the other side and screwed into the nut, and the length is adjusted to U. It can be a letter-shaped connecting bolt. The struts and the wood beams can be fixed to each other by inserting the threaded portions at both ends of the connection bolts into the mounting holes of the respective wood beams and tightening the nuts.

The mounting hole on the wooden beam side is formed at a position of 6 to 12% of the entire length from both end surfaces of the wooden beam. This provides a wood beam mounting structure that does not easily break when a tensile force is applied to the mounting hole into which one end of the U-shaped bolt is inserted.

The wooden protective fence of the present invention is a wooden protective fence in which at least two wooden beams are laid across a plurality of columns, and the height of the wooden beam from the road surface to the lower surface of the lowermost wooden beam in the positional relationship of the wooden beams. H1 = 50-250 mm, and the interval between each wood beam H2 = 50-250 nm
And the height from the road surface to the top of the uppermost timber beam is H3
= 650 to 1000 mm, and the dimension of the wood beam extending from the support to the road side is K ≧ 60 mm. The overhang dimension of the timber beam from the support to the road side is K ≧ 60 mm, and the difference of the overhang dimension of the timber beam from the support to the road side is ΔK ≦ 30 mm.

In a plurality of wood beams that are vertically laid on the support column, the distances and dimensions H1, H2, H3, K, Δ
Since K is determined as described above, the behavior of the vehicle after the collision can be adapted to the safety standard. That is, since the overhang dimension of each beam with respect to the support is set to 60 mm or more, the above-mentioned flexible structure is operated, and the collision energy can be flexibly absorbed during this 60 mm, so that the vehicle does not directly contact the support. From the viewpoint of safety and margin, the block-out K may be set to 90 mm or more. In addition, since the difference ΔK between the overhang dimensions of each beam is set to 30 mm or less, the collision energy can be received flexibly between the beams sequentially. The beam does not break. Furthermore, there is no danger that the vehicle will get over the fence and escape. The difference of 30 mm does not cause any discomfort in appearance. The dimensions H1, H2, and H3 are appropriate numerical values that can be generally applied. By observing the numerical values, it is possible to prevent both large and small vehicles from penetrating and jumping out. Together with these dimensions K and ΔK, the landscape,
The wooden guard fence of the present invention, which excels in function, is completed.

[0027]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 are explanatory views showing a wooden fence according to an embodiment of the present invention. The wooden protective fence of this example is to be installed on the shoulder of the road.

As shown in FIGS. 1 (a) and 1 (b), a wooden fence 1 according to an embodiment of the present invention includes a main body 2 (shown in detail in FIG. 2). A support structure 3 to the underground 4 for supporting the support body part 2 upright on the ground.
(Refer to FIG. 3) and the front surface (road side) of the support main body component 2.
And a pair of upper and lower wood beams 5 and 6 laid horizontally.

As shown in detail in FIG. 2, the column main body part 2 is formed by projecting a leg 8 composed of a reinforcing bar below a molded body 7 made of precast concrete. The leg 8 is firmly connected to a reinforcing bar incorporated in the molded body 7. On the upper and lower sides of the molded body 7, an upper receiving portion 9 and a lower receiving portion 10 are formed in a shape of spreading hands in a horizontal direction in order to fix and support the wood beams 5, 6, and on the front surface thereof,
Cross sections having a diameter larger than the diameter of the wood beams 5 and 6 are formed as receiving surfaces 11 and 12 having an arc shape. Moreover, in order to fix the wood beams 5 and 6 with bolts, the mounting holes 1 through which bolts can be inserted along the extending direction of the wood beams 5 and 6 are provided.
3 and 14 are provided. The receiving surfaces 11, 12 are provided with projections 15 (shown in detail in FIG. 7) for contacting the respective wood beams to be mounted and for absorbing part of the energy at the time of collision. Further, the bottom of the molded body 7 is formed into a special shape as a support bottom 16. That is, the support bottom portion 16 has a thickness, and its plane is formed in a semicircular or semi-elliptical shape, and its cut surface is located on the road shoulder side, and a force is applied to turn the support body 7 in the road shoulder direction. At this time, the pulling force T is applied to the leg 8 with the end C as a base point. The drawing force T will be described in detail with reference to FIG. Receiving parts 9 and 10 are provided with respective wood beams 5 and
6 are fixedly supported at predetermined positions, and the setting of the vertical interval is important. This interval will be described in detail with reference to FIG.

As shown in FIG. 3, a column support structure 3 for supporting the column body 2 upright on the ground is composed of a steel pipe pile 1.
7 and a pedestal block 18. The steel pipe pile 17 is defined by a pipe outer diameter Dmm and a length (buried length) Lm. When the installation surface is flat, the outer diameter D and the length L are set such that the outer diameter D of the steel pipe pile 17 is 135 mm or more and the length L buried in the ground is 1.3 mm or more. When the installation surface approaches the road shoulder, the outer diameter D of the steel pipe pile 17 is set to 135 mm or more and the length L buried in the ground is set to 1.8 mm or more.
These numerical values are obtained by repeated experimental results. By keeping this value, it is possible to obtain a column supporting structure having sufficient strength against a vehicle collision and not easily pulled out or collapsing the road shoulder.

The steel pipe pile 17 facing the ground surface is shown in FIG.
A rectangular pedestal block 18 shown in FIG. At the time of fitting, it is important to eliminate the gap, and if a gap occurs, it is filled with mortar. Pedestal block 18
Is formed to be larger than the size of the support bottom 16, and in particular, has a size sufficiently protruding toward the road shoulder side.
The amount of protrusion from the bottom 16 is about 20% or more of the end position of the bottom 16 with reference to the mounting center line of the leg 8. The area is about twice as large as the bottom part 16. Further, the fitting holes 19 of the base block 18 shown in FIG.
Shall be shifted to the road side from the center of the support.

At the upper end position in the pipe of the steel pipe pile 17, there is provided a roughened surface member for increasing the frictional force between the cement or concrete put into the inside and the leg 8 to increase the locking force. ing. The roughened surface member can be formed by, for example, welding a ring-shaped iron wire 20 in a pipe. It may be of such a degree that rust 21 is slightly generated inside the pipe. Both can be used together.

In the support structure 3 having the above structure, the installation is performed by driving the steel pipe pile 17 into the underground 4.
When the steel pipe pile 17 is driven into the underground 4, earth and sand 22 enter from the bottom to an intermediate position. Therefore, after the pedestal block 18 is installed, the mortar 23 or concrete is put into the steel pipe pile 17 and the column main body part 2 is set before it is hardened.
1 is held in the used state shown in FIG. 1, and after the mortar 23 is hardened, the entire column including the column main body part 2 and the column supporting structure 3 is completed. Until the mortar 23 is hardened, the bottom 1
6 only needs to be mounted on the pedestal block 18, and the vertical posture can be maintained without special support. As described above, since the support can be installed only by driving the steel pipe pile 17, inserting the mortar 23, and inserting the leg 8 of the support body part 2 into the mortar 23, the installation is easy.

FIG. 5 shows the details of the wood beams 5 and 6.
Wood beams 5, 6 are natural wood logs, especially 180 m in diameter
m of thinned wood is used. Sawmills can also be used. The length is a standard dimension of 2 to 3 m. At both ends of the timber beams 5, 6, mounting holes 24 are provided for fixed installation on the receiving portions 9, 10 of the support column main body component 2. The mounting hole 24 in this example has a rectangular diameter to facilitate alignment, but is not limited to this. In order to prevent the beam intensity from being lowered, the hole 24 is formed at a position away from both ends by about the beam diameter or 6 to 12% of the entire length.

Further, the wood beams 5 and 6 are provided with vertical split grooves (split processing) 25 having a depth corresponding to about 40% of the diameter over the entire length in the longitudinal direction. By providing the vertical groove 25 before the preservative treatment, the penetration of the preservative can be ensured, and the work can be completed in a short time. Moreover, after installation, cracks due to drying can be eliminated, and durability can be increased.
The wood beams 5 and 6 have the vertically split grooves 25 installed obliquely downward. Therefore, the wood beam does not corrode due to infiltration of rainwater.

FIG. 6 is an explanatory view showing the means 26 for attaching and fixing the wood beam 5 to the receiving surface 11 of the receiving portion 9 of the column body 2. The mounting and fixing means 26 includes a mounting hole 13 drilled in the lateral direction of the column main body 2, a pair of L-shaped bolts 27 which are bent substantially in an L shape and threaded at both ends thereof,
28 and one end of an L-shaped bolt 27 of one of the bolts is screwed into one end of an L-shaped bolt 27, and one end of the other L-shaped bolt 28 is screwed in a state where the nut 29 is inserted at an intermediate position of the mounting hole 13. U composed of
-Shaped connecting bolts 27 and 28 and the connecting bolt 2
Each of the nuts 7 and 28 is provided with a cap nut 30 which is inserted into a mounting hole 24 formed in the wood beams 5 and 5 and fastened in such a manner that both ends protrude horizontally inward.

Accordingly, a pair of L-shaped bolts 27, 28
By combining the above, one combination type U-shaped connection bolt 27 and 28 can be formed, and the wood beams 5 can be firmly fixed to each other by using the cap nut 30. One feature is that the length of the bottom of the U-shaped connecting bolt can be freely adjusted. The most significant feature is that the columns and beams can be firmly connected together. The same applies to the lower wood beam 6.

As shown in FIG. 7, projections 15 which can make point contact with the wood beams 5 and 6 are provided on the receiving surfaces 11 and 12 of the receiving portion of the column main body part 2. Specifically, the mounting and fixing means 26 comes into contact with the wood beams 5, 6,
Receiving surfaces 11 and 12 for receiving the collision load of the vehicle are formed, and the receiving surfaces 11 and 12 absorb a part of the collision energy of the vehicle by biting the wood beams 5 and 6 to reduce the load. 15 are provided. The protrusion 15 is formed in a tooth shape. The projection depth and interval are one of the collision energies.
Properly prescribed for absorbing parts. When the wood beam is tightened and fixed by the cap nut 30, the tightening force is:
It is assumed that the wood beams 5, 6 are in point contact with the protrusions 15 and slightly bite. The projections 15 also have the effect of improving drainage and enhancing durability.

The entire wooden protective fence 1 shown in FIG. 1 is completed by combining the components and structures shown in FIGS. That is, a plurality of pillars erected at predetermined intervals on the shoulder of the road, and a plurality of wood beams 5 and 6 laid horizontally at predetermined intervals vertically on the front surface of the ground portion of each pillar to form a fence. The wooden protective fence 1 which is constructed and receives the contact or collision of the vehicle from the front side and adapts the behavior of the vehicle to safety standards is completed. The distance H1 from the road surface to the lower surface of the lowermost timber beam 6 is within 50 to 250 mm. The gap interval H2 between the cushioning members is set to 50 to 250 mm. The distance H3 from the road surface to the upper surface of the uppermost timber beam 5 is 650 to 1
000 mm. Also, the overhang dimension K of each of the wood beams 5, 6 with respect to the forefront of the support is set to 60 mm or more,
And the difference ΔK between the overhang dimensions of the wood beams 5 and 6 is 30.
mm.

The operation of the wooden fence shown in FIGS. 1 to 7 will be described with reference to FIG. First, as shown in the figure, the wooden protective fence 1 has a shape in which a pair of upper and lower wood beams 5 and 6 are laid horizontally on the front surface of a pillar. As the wood beams 5 and 6, natural wood (cedar) whose skin is peeled from natural wood is used, and the interval between the two is appropriate. Therefore, the scenery is emphasized and the appearance is excellent. In the case of using thinned timber, it also supports forest development.

On the other hand, the wooden protective fence 1 has the most important protective function against vehicle collision. Now, it is assumed that the vehicle collides from the inside of the road at a collision angle, for example, 15 degrees, and applied a collision load W to the wooden fence 1 as shown in the figure. Vehicle speed V
Let E be the retained energy. When a vehicle with energy E collides with an object, the load W applied to the object is
It changes a lot depending on the energy absorption capacity of the object. Incidentally, when the object is a rigid body such as a concrete wall, the load W is large and is considerably larger than 10 g. Here, in the wooden protective fence 1 of the present invention, the elasticity F1 of the wood beams 5 and 6 itself, the elasticity F2 obtained within the overhang dimension K between the wood beams 5 and 6, and the absorption protrusion 15 on the receiving surface. The elasticity F3 due to the elasticity F3 (see FIG. 7) and the elasticity F4 related to the pull-out force T of the steel pipe pile 17 act, and the load W can be suppressed considerably smaller than 10 g.

The elasticity F4 will be described in detail. In the present invention, the rear end of the bottom portion 16 of the support comes into contact with the upper surface of the pedestal block 18 at line C. Therefore, when the load W is applied, the moment M that pushes the support column backward about the line C is converted into a force T that pulls out the leg 8, and thus the steel pipe pile 17, which acts as elasticity F4. The elasticity F4 works continuously until the steel pipe pile 17 is actually pulled out. Incidentally, since the conventional steel pipe pile is not configured to apply the pulling force T, when the load W is applied, the steel pipe pile is easily bent in multiple stages by the moment M, and the approach stroke is considerably large. The bending in this case is such that the road is easily bent once on the basis of the road surface, and then bent easily below the road, making the approach stroke considerably large.

As for each elasticity F1 to F4, when a load W starts to be applied to the wood beams 5, 6, one of the wood beams 5, 6 contracts, bites into the projection 15, and becomes large within the overhang dimension K. Energy E is absorbed, and the load W is minimized. During this time, the vehicle changes direction of travel, moves forward along the wood beams 5, 6, and leaves at an angle within 60% in the reflection angle direction. The departure speed is 60% or more of the collision speed, it is possible to depart from the protective fence, and the acceleration received by the occupant does not exceed 10 g. The load W applied from the time of collision to the time of departure is not shocking, but is reduced through the elasticity F1, F2, F3, F4. The purpose of the present invention is to alleviate the destruction of the protective fence 1 itself and to alleviate the impact on the vehicle and the passenger. When the collision energy E is large, the steel pipe pile 17 may actually be pulled out. In this case, the leg 8 is sustained with bending. However, the moment M or the bending force acting on the leg 8 during this time is considerably tough. That is, since the moment M is converted into the pulling force T, the steel pipe pile 17 is not easily bent and is tough. In fact, even in a collision experiment, the approaching stroke can be sufficiently suppressed within 1.1 m during these actions. An important point here is the operation of the U-shaped connection bolts 27 and 28 shown in FIG. That is, 1
A collision that occurs between two struts affects adjacent struts via the timber beams 5,6. In this example, the wood beams 5,
6 are connected to each other by the U-shaped connecting bolts 27 and 28, the force related to the entry process is converted into the tension of the wood beams 5 and 6, and the wood beams 5 and 6 are not detached from the columns. It has become. Therefore, the load W related to the approaching stroke is supported as a whole, and partial damage is avoided, the approaching process is reduced, and the vehicle is prevented from jumping out and scattering.

When the installation surface is a flat ground, the steel pipe pile 17 has an outer diameter D of 135 mm or more and an underground burial length L of 1.3 m or more. , The outer diameter D is set to 135 mm or more, and the length of buried underground L
Is set to 1.8 m or more. This is because of the approach 1.
It is a numerical value obtained by an experiment so as to be able to withstand a required load W within a range of 1 m.

FIG. 9 is a perspective view showing a wooden protective fence according to another embodiment of the present invention as viewed from the back side. The support structure of the present example is different in installation form from that shown in FIG. 2, and the entire structure from the underground part to the wood beam fixing part on the ground part is constituted by one support 31. As a method for fixing the support 31 and the wood beams 5 and 6, a deformable bracket 32 having a spatial structure is provided, and the wood beams 5 and 5 are collided by a vehicle.
6 is reduced by the deformation of the bracket 32,
Filling 33 such as concrete or mortar or asphalt is applied to the inside of the steel pipe at positions d = 15 cm above and below the ground surface of the steel pipe support 31 to suppress bending deformation of the steel pipe. Further, in the vicinity of the surface of the steel pipe support 31, a pressure receiving plate 34 made of a steel plate is provided in the ground by welding to the outer periphery of the support in parallel with the wood beam. Therefore, it resists the force of rotating the strut induced along the traveling direction of the collision vehicle, improves the passive earth pressure against the fall of the strut, and suppresses the approaching stroke at the time of collision within 30 cm. is there.

In FIG. 9, when a collision load W of the vehicle is applied from the front side, the ground portion of the steel pipe column 31 tends to fall forward in the figure, and a moment M for bending the steel pipe column 31 with respect to the road surface acts. At this time, in this example, since the steel pipe is filled with the filler 33 such as mortar, the bending strength is particularly improved, and the load W can be sufficiently resisted. The mortar 23 may be cast in place or may be formed in a factory in advance. In order to maintain high strength, the latter is preferred.

FIG. 10 shows still another embodiment. In FIG. 10, the leg 8 of the column main body part 2 shown in FIG. 2 is embedded in a fixing hole 36 provided above an upright portion of an L-shaped retaining wall block 35, which is an example of a concrete retaining wall, to form a column. An example is shown. The embedding of the leg 8 into the fixing hole 36 is as follows.
This is done by inserting the legs from above into the mortar cast in the holes. In the present embodiment, the base block 18 is unnecessary because the bottom 16 is in contact with the top of the retaining wall block 35 made of concrete. Leg 8 to retaining wall block 3
5 is mounted rigidly to withstand the maximum value of the pulling force T.

FIG. 11 shows an example in which a steel pipe is used also for the ground portion in FIG. 10 to form a steel pipe support 37 of a retaining wall installation type. Wood beams 5 and 6 are mounted on the ground via brackets 32. A small pressure receiving plate 34 is provided in the basement, and is embedded in the mortar filled in the fixing hole 36. Wood beam 5,
The intervals between the six are as described above. Wood beam 5,
The elastic cushioning function of the bracket 32 is added to the cushioning function of itself. The buffered load is applied to the above-ground portion of the steel pipe pile 37 and tends to bend with reference to the road surface. The inside thereof is filled with a filler 33 having a dimension d = 15 cm vertically above and below the ground surface. Does not bend with strength. In addition, since the pressure receiving plate 34 is provided, the load is reduced and does not rotate, so that the entire protection fence has high strength.

FIG. 12 shows an embodiment in which the mounting directions of the U-shaped connecting bolts 27 and 28 to the wood beams 5 and 6 are optimized. The figure shows a state where a tire 38 having a diameter of 1052 mm collides with a wooden protective fence 39. Assuming that the diameters of the timber beams 5 and 6 are the same and their centers coincide with each other on a vertical line, and the installation position is as shown in the figure, the tire 38 first hits the upper timber beam 5 and then calculated. It hits the lower wood beam 6 with a delay of 36 mm. At this time, the tire 38 acts to ride on the lower wood beam 6. That is, it acts to push down the wood beam 6 downward.

Therefore, in this example, as shown in the figure, if the connection direction 41 of the lower wood beam 6 to the molded body 7 by the U-shaped connection bolts 27 and 28 is indicated by a clock hand, The azimuth was set upward at 6:30 and 8:40. Therefore, in the wooden protective fence 39 of this example,
When the tire 36 is going to ride on the lower timber beam 6, the connection direction 41 is obliquely downward toward the inside.
The running force acts according to the bolt tension, and the connecting bolt 2
There is no breakage of 7 and 28 and no damage to the wood beams 5,6. It is preferable that the connecting direction 41 be as close to the vertical direction as possible.

The present invention is not limited to the above-described embodiment, but can be implemented in various forms with appropriate design changes without departing from the gist of the present invention.

[0052]

As described above, the wooden protective fence of the present invention comprises at least two timber beams, a plurality of concrete pillar bases provided with wood beam mounting portions on the road side, and a lower surface of the pillar bases. A rigid leg provided, a pedestal block with an opening buried near the surface of the ground, and a steel pipe pile buried underground through the opening of the pedestal block, containing the leg at the top and fixing with mortar With this feature, it is possible to reduce the collision load and convert it into the pull-out force of a steel pipe pile, which is not only flexible and robust and conforms to safety standards, but also allows passengers and vehicles to collide. The impact that is sometimes applied can be remarkably reduced, and a wooden protective fence that is friendly to people, vehicles, and the environment can be provided.

By decentering the center axis of the leg from the center axis of the column above the road, the pulling force can be adjusted.
A compact configuration can be achieved. Further, if the upper area of the leg is set to 20 to 35% of the above-ground portion of the column, concentrated stress is provided, and a strong column structure can be obtained.

Further, the wooden protective fence of the present invention is provided on at least two timber beams, a plurality of concrete pillar bases provided with a wood beam mounting portion on the road side, and a lower surface of the support bases. It is characterized by comprising a rigid leg, and a leg supporting mechanism by a concrete retaining wall having a leg fixing hole for accommodating the leg and fixing the leg with a mortar at the top, so that a flexible and robust wooden body is provided. The protective fence can be easily installed on the concrete retaining wall, and a wooden protective fence that is friendly to people, vehicles and the environment can be provided through the road shoulder and the concrete retaining wall.

Further, the wooden protective fence of the present invention comprises at least two wood beams, a support having a steel pipe having an integrated terrestrial portion and an underground buried portion, and a bracket having a wood beam mounting portion on the road portion on the ground portion. It is equipped with a pressure plate near the surface of the underground buried part so as to be substantially parallel to the road, so that a flexible and robust wooden protective fence conforming to safety standards is used. The durable wooden protective fence can be provided on the shoulder, and can be provided with the function of reducing load and suppressing rotation by the pressure receiving plate.

At least each of the upper and lower 15 from the road surface of the steel pipe support
If the filling is applied to 0 mm, the bending of the steel pipe can be particularly suppressed and the strength can be increased. The outer diameter of a pillar support structure made of steel pipe buried in the soil is 135 mm or more.
If it is 3 m or more and 1.8 m or more near the shoulder of the road law, it can meet a safety standard and can have a strong support structure.

Further, the wooden protective fence of the present invention accommodates at least two wood beams, a plurality of steel pipe pillars provided with brackets having wood beam mounting portions on the road side, and a lower part of the steel pipe pillars, and is made of mortar. A pillar support mechanism using a concrete retaining wall having a pillar fixing hole for fixing the pillar at the top is provided, so that a flexible and robust wooden protective fence can be installed on the concrete retaining wall while being made of a steel pipe column.

If the bracket is made of a deformable material, a buffering function in which the buffering effect of wood is added in this deformability can be realized, and the buffering effect can be further enhanced. If a protrusion is provided in the mounting portion of the timber beam of the support, a part of the collision energy can be absorbed by the protrusion biting into the wood, and this can be combined with the above-described buffering effect to realize a further buffering effect. The projections also have the effect of improving drainage and improving durability.

In addition, when attaching the wood beams to the columns, which are joined from the left and right, by connecting the three members with U-shaped connecting bolts, the three members are flexibly and firmly linked to each other.
It can respond flexibly to collisions and does not lead to destruction. If the U-shape is obtained by combining two L-shaped bolts with a nut member, the length of the support post mounting hole can be freely adjusted, and the mounting operation is easy. If the drilling position of the mounting hole on the wood beam side is set to 6 to 12% of the entire beam length, the strength of the wood beam does not decrease.

In the positional relationship between the plurality of wood beams, the height from the road surface to the lower surface of the lowermost wood beam is 5
0-250mm, spacing between beams 50-250mm,
The height from the road surface to the top of the timber beam on the top floor is 650
When the thickness is set to 1000 mm, it is possible to provide a wooden fence that is environmentally friendly, has a good view, does not penetrate small vehicles and large vehicles, does not jump out, and is friendly to people, vehicles and the environment.

If the length of the protrusion of the wood beam from the support to the road side is set to 60 mm or more, the collision absorption function of the wood beam due to elasticity, deflection, biting, etc. can be sufficiently exhibited within this distance. In addition, if the difference between the overhang dimensions of each step wood beam is set to 30 mm or less, the collision load can be reduced by sequentially adding the collision energy absorbing effect within this distance, the appearance is not strange, and the wooden is excellent in the scenery A protective fence can be provided.

[Brief description of the drawings]

FIG. 1 is a side view (a) and a front view (b) of a wooden protective fence showing one embodiment of the present invention. The figure (a) is equivalent to the left side view of the figure (b).

FIG. 2 is an enlarged perspective view of the main body of the column shown in FIG. 1 as viewed from the front side.

FIG. 3 is an explanatory cross-sectional view of a support structure for supporting the support body component illustrated in FIG. 2 on the underground side.

FIG. 4 is a bottom view of the pedestal block shown along the line F4-F4 in FIG. 3;

FIG. 5 is a left side view (a) and a front view (b) of a wooden cushioning material (wood beam).

FIG. 6 is a plan sectional view showing a structure for attaching a wooden cushioning material to a column shown along the line F6-F6 in FIG. 2;

FIG. 7 is a side view of the column showing the mounting structure of the wooden cushion of the column.

FIG. 8 is a side model showing the action of the wooden protective fence shown in FIGS.

FIG. 9 is a perspective view of a wooden protective fence showing another embodiment of the present invention as viewed from the back side.

FIG. 10 is a side view of a wooden protective fence showing still another embodiment of the present invention.

11 is a side view of a wooden protective fence showing an example in the case where the above-ground portion is made of steel pipe in the embodiment shown in FIG.
The retaining wall is shown in cross section.

FIG. 12 is a side view showing an embodiment of a mounting angle of a wood beam by a U-shaped connecting bolt.

[Explanation of symbols]

 1, 39: wooden protective fence 2: support column main body part 3: support column support structure 4: underground 5, 6: wood beam 7: molded body 8: leg body 9, 10, receiving part 11, 12, receiving surface 13, 14 , 24, 39, 40 mounting hole 15 projection 16 bottom column 17 steel pipe pile 18 pedestal block 19 mounting hole 20 iron wire 21 rust 22 earth and sand 23 mortar 25 vertical split groove 26 mounting Fixing means 27, 28 L-shaped bolt 29 ... Relay nut 30 ... Nut with cap 31, 37 ... Steel pipe support 32 ... Bracket 33 ... Filling material 34 ... Pressure receiving plate 35 ... Retaining wall block 36 ... Fixing hole 38 ... Tire 41 ... Connection direction d: Filling dimension D: Outer diameter of steel pipe pile L: Embedded length of steel pipe pile K: Overhang dimension of wood beam (block out) ΔK: Difference in overhang dimension C: Rotation center of support above ground M: Impact load Accompanying times Rolling moment T: Pull-out force of steel pipe pile H1: Distance from the road surface to the lowermost wood beam H2: Distance between the wood beams H3: Distance from the road surface to the upper surface of the uppermost wood beam

Claims (18)

[Claims] 1. A vehicle comprising: a plurality of pillars erected at predetermined intervals on a road side of a vehicle traffic area; and a plurality of timber beams horizontally suspended at predetermined intervals above and below a ground surface of each pillar. A wooden protection fence configured in a fence shape, receiving contact or collision of the vehicle from the front side, and adapting the behavior of the vehicle to safety standards, wherein at least two wood beams and a wood beam mounting portion are mounted on a road side. A plurality of concrete struts above the ground, rigid legs provided on the lower surface of the strut, a pedestal block with an opening buried near the surface of the ground, and an underground through the opening of the pedestal block. A wooden protective fence, which is buried, and has a steel pipe pile that accommodates a leg and fixes it with mortar on an upper part. 2. The wooden protection fence according to claim 1, wherein the steel pipe pile has a rough surface or a projection on an inner surface thereof. 3. The pedestal block according to claim 1, wherein the pedestal block has an area that is at least twice as large as the bottom area of the column above the column, and the aperture is eccentric to the road from the column center axis. Wooden guard fence. 4. A vehicle comprising: a plurality of pillars erected at predetermined intervals on a road side portion of a vehicle traffic area; and a plurality of timber beams horizontally suspended at predetermined intervals above and below a front surface of each pillar. A wooden protection fence configured in a fence shape, receiving contact or collision of the vehicle from the front side, and adapting the behavior of the vehicle to safety standards, wherein at least two wood beams and a wood beam mounting portion are mounted on a road side. A plurality of concrete struts above the ground, rigid legs provided on the lower surface of the struts above the ground, and a concrete holder having at its top a leg fixing hole for accommodating the legs and fixing with mortar. A wooden protective fence comprising a leg supporting mechanism by a wall. 5. The wooden fence according to claim 4, wherein a center axis of the leg is eccentric to a road side from a center axis of a bottom surface of the pillar. 6. The wooden protective fence according to claim 1, wherein an upper area of the leg occupies 20 to 35% of a bottom area of the support. 7. A vehicle comprising: a plurality of pillars erected at predetermined intervals on a road side of a vehicle traffic area; and a plurality of timber beams horizontally suspended at predetermined intervals above and below a front surface of each pillar. A wooden protective fence configured in a fence shape, receiving contact or collision of the vehicle from the front side, and adapting the behavior of the vehicle to safety standards, wherein at least two wood beams, a ground part and an underground buried part are provided. A wooden body comprising a column made of an integral steel pipe, a bracket having a wood beam mounting portion on the road above the ground, and a pressure receiving plate substantially parallel to the road near the surface of the underground buried portion. Guard fence. 8. The wooden fence according to claim 7, wherein a filler such as a concrete or mortar layer is filled inside at least 150 nm above and below the road surface of the column made of the steel pipe. 9. When the underground portion of the column is a column made of a steel pipe pile or a steel tube, its outer diameter is set to 135 mm or more,
The wooden protective fence according to claim 1 or 7, wherein the length of buried underground is 1.3 m or more in flat terrain and 1.8 m or more in the vicinity of a road shoulder. 10. A vehicle comprising: a plurality of pillars erected at predetermined intervals on a road side of a vehicle traffic area; and a plurality of wood beams horizontally suspended at predetermined intervals above and below the front surface of each pillar. A wooden protective fence configured as a fence, receiving contact or collision of the vehicle from the front side, and adapting the behavior of the vehicle to safety standards, wherein the bracket has at least two wood beams and a wood beam mounting portion. A wooden protective fence comprising: a plurality of steel pipe struts provided on the road side; and a pillar support mechanism formed by a concrete retaining wall having a pillar fixing hole at the top for accommodating a lower portion of the steel pipe strut and fixing with a mortar. . 11. The wooden fence according to claim 7, wherein the bracket is made of a deformable material. 12. The wooden fence according to claim 1, wherein the timber beam mounting portion of the support has a semicircular cross section and has a plurality of protrusions on an inner surface. 13. A timber beam and a support are fixed with U-shaped connection bolts through a mounting hole in a radial direction of both ends of the timber beam and a mounting hole in a lateral direction on the back side of the timber beam mounting portion of the support. The wooden protective fence according to claim 1, wherein the protective fence is a wooden fence. 14. The wooden structure according to claim 13, wherein the U-shaped connecting bolt is composed of two L-shaped bolts which are connected to each other via a nut in a mounting hole of the column so as to be able to expand and contract. Guard fence. 15. The wooden protective fence according to claim 13, wherein the mounting hole on the wooden beam side is drilled at a position of 6 to 12% of the entire length from both end surfaces of the wooden beam. 16. A vehicle comprising: a plurality of pillars erected at predetermined intervals on a road side portion of a vehicle traffic area; and a plurality of timber beams suspended horizontally at predetermined intervals above and below the ground surface of each pillar. A wooden protective fence configured in a fence shape, receiving contact or collision of the vehicle from the front side, and adapting the behavior of the vehicle to safety standards, wherein a positional relationship of the wood beam is as follows. Characterized wooden guard fence. (1) The height from the road surface to the lower surface of the lowermost timber beam is H
1 = 50 to 250 mm. (2) The interval between each wood beam is H2 = 50 to 250 m
m. (3) The height from the road surface to the top of the uppermost timber beam is H
3 = 650 to 1000 mm. (4) The overhang dimension of the timber beam from the support to the road side is K ≧ 60 mm. 17. The wooden protective fence according to claim 16, wherein a dimension of the timber beam extending from the support to the road side is K ≧ 90 mm. 18. The wooden protective fence according to claim 16, wherein the difference in the size of the protrusion of each step wood beam from the support to the road side is ΔK ≦ 30 mm.