KR101720783B1 - Pillar for supporting roadside vehicle barrier, and supporting method using the same - Google Patents

Abstract

The present invention relates to a pillar for reinforcing a vehicle crash barrier and a reinforcing method using the same. The reinforcing method reinforces horizontal bearing power of a vehicle crash barrier including a plurality of main pillars installed on a boundary of a mound consisting of a horizontal road surface and an inclined surface outside a road at regular intervals, and a guardrail connected between the main pillars, and calculates a horizontal and a vertical burying position of an auxiliary pillar outside the road of the mound in a horizontal displacement direction of the main pillars to be driven and buried by a noncontact method with respect to the main pillars. According to the present invention, the auxiliary pillar is buried by a simple noncontact driving method in a prescribed length and depth without performing separate work for a pillar of a vehicle crash barrier or a beam as a surrounding facility to have low costs and high constructability and provide excellent reinforcing performance in comparison to a previously installed vehicle crash barrier.

Description

TECHNICAL FIELD [0001] The present invention relates to a pillar for reinforcing a vehicle fence, and a reinforcing method using the pillar,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a support for reinforcing a vehicle fence and a reinforcing method using the same.

The vehicle protection fence is a facility for preventing a vehicle that deviates from a normal driving route from departing from the road, opposite car, or sidewalk, while at the same time minimizing damage to the occupant and damage to the vehicle, and returning the vehicle to the normal traveling direction.

However, since the vehicle often collides with a protective fence and leaves the road, it is necessary to reinforce the safety of the roadside fence to reduce the damage caused by traffic accident such as overturning or falling of the vehicle. Particularly, since the horizontal support force of the vehicle-guarded fence installed in the embankment is lower than 70% of that of the flat section, even in the case of the guard fence that has passed the crash test of the flat part, it is difficult to secure the safety in the embankment, There is a need for a reinforcement plan.

As a method of reinforcing the horizontal support force of the vehicle protective fence installed in the conventional fillet, there are a simple method of increasing the embedding depth of the vehicle protection fence, a method of using the earth pressure plate, a concrete basic reinforcement method, Reinforcement method, and the like are known. Although these reinforcement methods have been reported to show the effect of a certain performance enhancement on a vehicle protection fence without performance verification, the existing vehicle protection fence itself or the installation of the vehicle protection fence is dismantled or corrected, There is a limit.

It is an object of the present invention to solve all the problems of the prior art described above and to provide a vehicle protection fence And a reinforcement method using the reinforcement column

The inventors of the present invention have found that in the course of taking a method for reinforcing a vehicle-protected fence that simultaneously satisfies both workability and economical efficiency while exhibiting excellent reinforcing performance without damaging or disassembling the previously installed bonnet-protecting fence pillars, A method of embedding a non-contact type auxiliary post in the back of the auxiliary post and considering the horizontal usability of the auxiliary post, It can be determined that, with respect to the vertical embedding position of the auxiliary strut top, the vehicle-guard hedge strut can be determined so as to satisfy the design reference value for the horizontal support force at the maximum horizontal displacement, and at the same time, according to the horizontal displacement of the vehicle- In order to ensure good contact, By devising a structure and it led to the present invention. The gist of the present invention based on such an idea and the recognition of the above problem is as follows.

(1) reinforcing a horizontal support force of a vehicle protection fence including a plurality of main supports provided at a predetermined interval and a guard rail connected between the main support, provided at a boundary between a horizontal road surface and a slope outside the road, The auxiliary struts are embedded in the main strut in a non-contact manner outside the road of the embankment along the horizontal displacement direction of the main strut, the auxiliary strut being embedded in parallel with the main strut; And a cantilever extending parallel to a horizontal direction at an upper end of the strut, the cantilever being in contact with the main strut when the main strut is horizontally displaced due to a vehicle collision, the distance between the main strut and the strut Ph) is determined according to the following equation.

P _h = Cv / As (in this case, 0.3 < = Cv < = 0.8)

P _h : the distance between the center of the main stanchion and the center of the stanchion of the stanchion (m)

C _v ; Reaction force reduction factor (m ³ )

A _s ; Projection area of the auxiliary strut in the horizontal movement direction (m ² )

(2) so as to contact the top of the sub-holding in the vertical embedding position (P _v) is, based on the horizontal displacement reaches the point (d _o) before initiation of the contact reaches a displacement (d _c) of the main holding the pre-set of the sub-holding (1). The method according to any one of the preceding claims, further comprising:

d _c = α * d _o (in this case, 0.3 <= α <= 0.7)

alpha; Safety Contact Coefficient

d _o ; reference horizontal displacement

d _c : contact horizontal displacement

(3) The method as described in (1) or (2) above, wherein the auxiliary strut is entirely or partially embedded in the ground.

(4) Strengthening the horizontal support force of the vehicle protection fence including a plurality of main struts installed at regular intervals and a guard rail connected between the main struts, provided at the boundary of the embankment made of the horizontal road surface and the off- A main support portion embedded in parallel with the main support; And a cantilever extending in a horizontal direction extending parallel to the upper end of the strut and contacting the main struts horizontally displaced.

(6) The cantilever includes an extension extending from the support portion; And a supporting portion provided at an end of the extending portion and scheduled to be contacted when the main strut is horizontally displaced due to a vehicle collision. The auxiliary strut for reinforcing a vehicle security fence according to (4) above.

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(7) The auxiliary support for reinforcing a vehicle security fence according to (6), wherein the cantilever beam has a departure prevention guide portion for preventing the main cantilever from coming off when contacting the main support.

(8) The auxiliary support for reinforcing a vehicle security fence according to (4), wherein the cantilevers are spaced apart from an upper end of the support part so that the upper end of the support part is constituted by an engagement head part.

According to the present invention, the auxiliary struts are buried in a simple manner in a non-contact manner at a predetermined distance and depth without performing any special operation on the beam as a support or peripheral facilities of the vehicle protection fence, It is possible to give excellent reinforcement performance with the sophistication.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram of a method for reinforcing a vehicle fence in accordance with an embodiment of the present invention; FIG.
Fig. 2 is a perspective view of the auxiliary strut used in Fig. 2; Fig.
Fig. 3 is a table for the reduction coefficient of the reaction force coefficient due to crowd pile effect.
4 is a schematic diagram illustrating a horizontal displacement process of a main stanchion according to an embodiment of the present invention.
5 is a graph of load-displacement variation of a vehicle-guarded fence having a horizontal support force reinforced according to an embodiment of the present invention.
6 is a comparative diagram of the present invention and a conventional vehicle-guard fence reinforcement method.
7 is a perspective view of an auxiliary strut according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same or similar reference numerals are given to the same or similar parts.

In addition, throughout the specification, when an element is referred to as including an element, it is understood that the element may include other elements, not the exclusion of any other element, unless specifically stated otherwise.

Also, it is to be understood that when an element is referred to as being &quot; selectively &quot; provided, included, or included, it is not necessarily an essential component for solving the problem of the present invention, it means.

FIG. 1 is a conceptual diagram of a method for reinforcing a vehicle protection wooler according to an embodiment of the present invention, and FIG. 2 is a perspective view of an auxiliary strut used in the reinforcing method.

1, the vehicle protection fence 10 to which the present invention is applied is intended to be installed at the boundary of the embankment 30 composed of the horizontal road surface 310 and the off-road inclined surface 320. As shown in FIG. The inclination angle of the inclined surface 320 may vary depending on road conditions, but is generally in the range of 30 to 60 degrees.

The vehicle protection fence 10 includes a plurality of main supports 110 installed at regular intervals along the boundaries of the embankment and a guard rail 120 connected between the main supports 110. The guard rails 120, Is illustrated as being coupled to the proper position of the main support 110 facing the horizontal road surface 310 side. The sectional shape of the main strut 110 is illustrated as a circular shape, but is not limited thereto.

The displacement behavior due to the vehicle collision in the vehicle protection fence 10 having such a structure is determined by the fact that each main support 110 which is mutually restrained by the guard rails 120 is positioned at an impact position relative to the vehicle protection fence 10 And is horizontally displaced in a direction perpendicular to the road direction regardless of the direction.

The present invention relates to a method for reinforcing a lateral support force of a vehicle such that a horizontal support force can be secured at a reference horizontal displacement d _o (see FIG. 4) of the main support 110 in accordance with a design standard in a horizontal displacement behavior of such a vehicle protection fence The auxiliary pillars 20 are buried in the basement in a non-contact manner with respect to the main pillars 110 on the rear side of the main pillars 110 along the extension line of the main pillars 110 in the horizontal direction do.

The values for the reference horizontal displacement d _o and the horizontal support forces at the reference horizontal displacement d _o are predetermined according to the design criteria. For example, regarding the measurement of the horizontal support force of the vehicle protection fence 10, according to the road safety installation and management guide issued by the Ministry of Land, Transport and Maritime Affairs in 2014, the embankment depth of the support is set to 1650 mm, and the horizontal support load height is set to 650 mm The load is measured by measuring the load-displacement relationship until the bridge can not resist any further load. The load at the displacement of 350 mm is regarded as the horizontal grounding force of the landing, and when the measured horizontal supporting force value is above the predetermined value, . &Lt; / RTI &gt; According to these criteria, the reference horizontal displacement (d _o ) can be viewed as 350 mm.

Referring to FIG. 2, the auxiliary strut 20 includes a support portion 210; And a cantilever 220 formed on the upper end of the support portion 210. The auxiliary struts 20 may be entirely or partly embedded in the ground. In this embodiment, the auxiliary struts 210 and the cantilevers 220 constituting the auxiliary struts 20 are embedded in the ground. Also, in the embodiment, the sectional shape of the support portion 210 is exemplified as a circular cross section, but the present invention is not limited thereto.

The pillar 210 is embedded in parallel with the main pillar 110 so that the pillar of the main pillar 100 can be prevented from being pivoted when the main pillar 100 is tilted due to a vehicle collision. The cantilevers 220 can be easily brought into contact with the auxiliary struts 20 before reaching the reference horizontal displacement d _o when the main struts 110 are tilted. So that the horizontal support force of the auxiliary support 20 can be gently guided to the main support 110 even when the main support 110 is not excessively separated from the main support 110. [

Each corner of the cantilever 220 includes an extension 222, a separation prevention guide 223, and a support 224. The extending portion 222 extends in a direction in which the main strut 110 is installed and the supporting portion 224 constitutes an end side of the extending portion 222 to be in contact with the main strut 110 . Alternatively, the cantilevers 220 may be disposed on both sides of the long-term support portion 224 to prevent the main support 10 from being easily received in the process of contacting the support portion 224 and being separated from the horizontal displacement direction. A departure prevention guide portion 223 may be provided. In this embodiment, the support portion 224 and the departure-avoiding guide portion 223 are integrally formed with the extending portion 222 and are curved inward. In this case, the width of the departure- (110).

In addition, unlike conventional bracing reinforcement methods, the method of reinforcing a vehicle barrier fence according to the present invention reinforces the auxiliary struts 20 in a simple manner with a predetermined position and depth as described later, The cantilever 220 is spaced apart from the upper end of the supporting part 210 by a predetermined distance so as to prevent the cantilevers 220 from being damaged at the time of hitting of the supporting part 210, .

1, the horizontal embedding position P _h of the auxiliary strut 20 with respect to the main strut 110, that is, the distance between the main strut 110 and the auxiliary strut 20, ) And the main pillar (110), the horizontal support force due to the pile effect is not excessively reduced, and at the same time, the space utilization for the construction area is taken into consideration and is determined according to the following equation (1) Can be determined.

[Formula 1]

P _h = Cv / As (in this case, 0.3 < = Cv < = 0.8)

In this case, P _h is the distance (m) between the center of the main strut 110 and the center of the auxiliary strut 20, Cv is the reaction force reduction coefficient m ³ , Directional projection area (m ² ), and the projected area can be calculated as the product of the width and length of the strut.

The spacing center distance P _h is basically inversely proportional to the projection area As of the auxiliary struts 20 in the horizontal direction. That is, the larger the projection area As of the auxiliary struts 20 in the horizontal moving direction, the smaller the distance P _h between the main struts 110 and the auxiliary struts 20 can be.

In the above equation (1), Cv is the reaction force reduction factor (P-multiplier) indicating the degree of reduction of the horizontal support force according to the crowd pile effect, and FIG. 3 is the result of the model experiment on the reaction force reduction coefficient according to the crowd pile effect Table. In the model test, the cross section and diameter of the main strut 110 and the auxiliary strut 20 were assumed to be the same, and when the distance between the strut centers was increased to 2.5D, 5.0D, and 7.5D based on the diameter D of the main strut The reaction force reduction coefficient of each of the main strut 110 and the auxiliary strut 20 due to the pile pile effect is increased. In this case, the total reaction force reduction factor Cv = (auxiliary support reaction force reduction factor) - (1 - main support reaction force reduction factor) can be calculated.

The Cv value is preferably selected from 0.3 or more and 0.8 or less. If the Cv value is smaller than 0.3, it is impossible to expect a lateral support force reinforcing effect according to the design standard due to the crowd pile effect. If the Cv value is larger than 0.8, the construction area is excessively increased and the cost may increase.

Meanwhile, FIG. 4 is a schematic diagram of a horizontal displacement process of a main support according to an embodiment of the present invention. 1 and 4, the auxiliary strut 20 is installed in a non-contact manner with the main strut 110. In order to gradually reinforce the horizontal supporting force with respect to the main strut 110, (D _c ) before the reference horizontal displacement d _o reaches the reference horizontal displacement d _o . In the figure, the main holding unit 110 from the position "A" state, the displacement start of the contact due to external impact (d _c) is displaced as much as after reaching the "B" point, based add as many horizontal displacement (d _o) displacement And reaches the point &quot; C &quot;.

In this case, the vertical embedding position Pv of the auxiliary strut 20, that is, the position of the upper end of the buried auxiliary strut 20 to the end side of the cantilever 220 is determined according to the value of the contact initiation displacement d _c And can be determined according to the following formula (2) in consideration of the side for inducing the gentle lateral support force reinforcement of the auxiliary struts 20 to the main support 110 which is inclined and the ease of installation.

[Formula 2]

d _c = α * d _o (in this case, 0.3 <= α <= 0.7)

In this case, α denotes the safety contact coefficient, d _o denotes the reference horizontal displacement, and d _c denotes the horizontal displacement.

In the above formula (2), it is preferable that the safety contact coefficient alpha is selected to be not less than 0.3 and not more than 0.7. The main holding the α value is less than 0.3, contact the horizontal displacement (dc) and the vertical embedding position (P _v) is too small, installed to be largely a length of the auxiliary holding the group to compensate for the horizontal force by the flock pile effect ( The contact horizontal displacement dc and the vertical embedding position Pv are too large to increase the reference horizontal displacement d _o to the main horizontal displacement d _o , It is difficult to secure a gentle lateral support force with respect to the support 110, which is not preferable.

When the horizontal landing position P _h , which is a distance from the main support 110, is determined according to the above formula (1), the auxiliary strut 20 is provided with the above- And may be in the form of being completely or partially embedded in the bar and the ground. For example, as the angle of the inclined plane 320 on which the auxiliary struts 20 are installed is partially exposed, the portion buried in the auxiliary struts 20 of a predetermined length becomes relatively small as the auxiliary struts 20 are partially exposed to the ground, The problem that the horizontal supporting force is weakened can be compensated for by increasing the length of the auxiliary struts 20 within the range allowed by the above formula (2) to relatively increase the portion to be buried.

5 is a graph showing a load-displacement variation amount of a vehicle protection fence reinforced by a horizontal support force according to an embodiment of the present invention, wherein a solid line indicates a case where the reinforcing pillar 20 is installed, a dotted line indicates a case where the reinforcing pillar 20 is installed Respectively.

Also to refer to Figure 5, but the main holding unit 110 is observed, the horizontal force due to contact horizontal displacement (d _c) prior to reaching the main holding unit 110, after reaching the contact with horizontal displacement (d _c) is an auxiliary It can be confirmed that the horizontal support force of the whole of the vehicle protection fence 10 is increased by DELTA F by adding the horizontal support force by the support 20. The load displacement behavior, contact lateral displacement (d _c) up through a relatively weak horizontal force effectively absorb the initial impulse and contact the horizontal displacement of the vehicle collision (d _c) a relatively strong solid horizontal force starting point through the It is advantageous in terms of satisfying both the safety of the passenger and the risk of derailment after the vehicle collision, by preventing the derailment of the vehicle in which the initial impulse amount is absorbed.

As described above, according to the present invention, the auxiliary struts are buried in a simple non-contact manner in a non-contact manner at a predetermined distance and depth without performing a separate operation on the beams as the struts or peripheral facilities of the vehicle protection fence, It is possible to provide excellent reinforcement performance with low cost and high sophistication.

6, which is a comparative view of the present invention and a conventional vehicle protection fence reinforcement method, in the case of the conventional bracing method, in addition to the hitch for the rear auxiliary support, The bracing operation and the like are performed separately. In this process, the existing embankment and the main body of the vehicle protection fence are disassembled or modified, but according to the embodiment of the present invention, since such unnecessary work is not involved, And economic efficiency.

While the foregoing is directed to a specific embodiment of the present invention, it is to be understood that the above-described embodiment of the present invention has been disclosed for the purpose of illustration and is not to be construed as limiting the scope of the present invention, It should be understood that various changes and modifications may be made to the disclosed embodiments without departing from the spirit of the invention.

1 and 2, the sectional shape of the main support 110 and the support portion 210 of the auxiliary support 20 is circular, but the present invention is not limited thereto. For example, as shown in FIG . 7, a cross-sectional shape of the support portion 210 of the auxiliary strut 20 may be formed of an H-shaped steel or a corrugated sheet material. Particularly, in the case of constructing the support portion 210 of the auxiliary strut 20 with such H-shaped steel or corrugated sheet material, the horizontal support area is enlarged as compared with the auxiliary strut 20 made of the steel pipe of circular section shown in Fig. 2 It is possible to sufficiently reinforce the horizontal support force of the vehicle protection fence even in a work environment in which the inclination angle of the road slope 320 is large and the separation distance P _h between the auxiliary support 20 and the main support 110 is shortened have. 7A, unlike the integral cantilever beam shown in FIG. 2, the extension 222, the separation prevention guide 223, and the support 224 constituting the cantilever are manufactured using separate members, It is also possible to do.

It is therefore to be understood that all such modifications and alterations are intended to fall within the scope of the invention as disclosed in the following claims or their equivalents.

10: Vehicle protection fence 110: Main landing
120: Guard rail
20: auxiliary landings
210: support part 212: hanger head part
220: Cantilever 222: Extension
223: Departure-preventing guide portion 224: Support portion
30:
310: horizontal road surface 320: inclined surface
P _h : the distance between the center of the main stanchion and the center of the auxiliary stanchion
P _v : Vertical embedding position of auxiliary strut
d _o ; reference horizontal displacement
d _c : contact horizontal displacement

Claims (8)

A method of reinforcing a horizontal support force of a vehicle protection fence including a plurality of main struts installed at a predetermined interval and a guard rail connected between main struts, the strut being provided at a boundary between a horizontal road surface and a slope outside the road, The auxiliary strut is embedded in the main strut in a non-contact manner outside the road of the embankment along the horizontal displacement direction of the main strut,
Wherein the auxiliary strut is embedded in parallel with the main strut; And a cantilever extending parallel to a horizontal direction at an upper end of the strut and contacting the main strut when the main strut is horizontally displaced due to a vehicle collision,
Wherein the distance (Ph) between the main support and the support of the auxiliary support is determined according to the following expression.
Ph = Cv / As (in this case, 0.3 < = Cv < = 0.8)
Ph: Distance between the center of the main stalk and the center of the stalk of the auxiliary stalk (m)
Cv; Reaction force reduction factor (m ³ )
As: Horizontal moving direction projected area of auxiliary stanchions (m ² ) 2. The apparatus of claim 1, wherein the vertical landing position of the auxiliary strut is such that the main strut is brought into contact with the top of the auxiliary strut at a point of arrival of the contact start displacement (d _c ) before reaching a predetermined reference horizontal displacement (d ₀ ) Wherein the reinforcing member is determined in accordance with the following equation.
d _c = α * d _o (in this case, 0.3 <= α <= 0.7)
alpha; Safety Contact Coefficient
d _o ; reference horizontal displacement
d _c : contact horizontal displacement The method of claim 1 or 2, wherein the auxiliary strut is embedded in the ground entirely or partly. A plurality of main pillars provided at a boundary between a horizontal road surface and a slope outside the road and provided at regular intervals and a guard rail connected between the main pillars, Wherein the auxiliary support comprises:
A main support portion embedded in parallel with the main support; And a cantilever extending parallel to a horizontal direction at an upper end of the strut and contacting the main strut when the main strut is horizontally displaced due to a vehicle collision,
Wherein the auxiliary support is embedded in the main support in a non-contact manner outside the road of the embankment along the horizontal displacement direction of the main support. delete 5. The apparatus of claim 4,
An extension extending from the support; And a supporting portion provided on an end side of the extending portion and scheduled to be contacted at the time of horizontal displacement of the main support due to a vehicle collision. The auxiliary support for a vehicle security fence reinforcement according to claim 6, wherein the cantilevers are provided with a departure-preventing guide portion for preventing the main cantilevers from coming off. 5. The auxiliary support for a vehicle security fence reinforcement according to claim 4, wherein the cantilevers are spaced apart from an upper end of the support part so that an upper end of the support part is constituted by an engagement head part.

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