KR20140028234A - Energy absorber system and rockfall protection fence using the same - Google Patents

Abstract

The present invention relates to an energy dissipation system and a falling stone prevention fence using the energy dissipation system that is provided to dissipate the energy of falling stones according to the collision between the stone and the fence to prevent the falling stones from penetrating the fence, thereby preventing damage to the falling stone prevention fence and to effectively reply to the falling stones, thereby minimizing impact according to the collision with the falling stones. The falling stone prevention fence comprises: a post installed on a base structure; a grid type steel wire mesh extended between the posts; a wire rope which is installed by crossing a gap between the posts and which holds the steel wire mesh; and a wire rope spacing unit which prevents a gap of the wire rope from being vertically generated. The falling stone prevention fence includes the energy dissipation system which is installed longitudinally and transversely at constant sections of the wire rope installed between the posts and which dissipates the energy of the falling stones, wherein the energy is generated by the instantaneous deformation of the system during the collision with the falling stones, thereby preventing the stones from falling down from the fence when the stones collide with the fence.

Description

[0001] The present invention relates to an energy dissipation system and a rockfall protection fence using the same,

The present invention relates to an energy dissipating system and a rockfall preventing fence using the same. More particularly, the present invention relates to an energy dissipating system and a rockfall preventing fence using the same, To an energy dissipating system for minimizing the impact caused by a rockfall collision, and a rockfall preventing fence using the same.

In general, a rockfall prevention fence is a structure that is installed to prevent traffic obstacles, road structure damage, loss of property and human life due to rockfall and rock incision adjacent to the road, and earth and earth collapse.

The function of the conventional rockfall prevention fence is to prevent rockfall movement by resisting the impact of rockfall, to absorb the energy of rockfall, to prevent the falling of the rockfall on the road, and to change the fallfall direction of the rockfall, leading to the place without danger. Function is the basic function.

This conventional rockfall prevention fence is composed of an end circumference fixed to the ground or concrete foundation, the intermediate circumference and the wire rope and the grid-shaped wire mesh is installed across the support. At this time, the wire rope and the grid-shaped wire mesh is fixed with a connecting ring.

However, in the conventional rockfall prevention fence, when the rockfall collides with the wire mesh and the wire collides with the rockfall due to the occurrence of rockfall, the rockfall energy is directly transmitted to the wire mesh, the wire rope and the support. This is a problem that provides the biggest cause of threat to safety accidents by breaking or penetrating the rockfall prevention fence when the rockfall energy is large.

Therefore, in recent years, various types of rockfall prevention fences have been proposed. For example, a shock absorbing and shock absorbing structure using an assembly or connection clips for crossing a wire rope across a strut and interconnecting crossed wire ropes may be installed to absorb and cushion rockfall energy due to a fall rock impact, The rock-displacing structure was prepared for the shock to rockfall energy.

However, the shock absorbing and shock absorbing structures applied to the above-mentioned rockfall preventing fence can not prevent instantaneous fall-off energy, easily break before shock absorption, or easily fall off during response to falling rock energy, There is a problem that the rockfall energy can not be efficiently defended and the function can not be performed properly.

In addition, the impact of rockfall energy can not be dissipated when a rockfall collides with an anti-rocking fence, so that even if a wire rope is provided with a gap retaining device, there is a problem that a wire mesh penetrates easily.

It is an object of the present invention to provide an anti-rocking fence using an energy dissipating system that enables a fall-prevention fence to maintain the function of an anti-fall prevention fence without penetration of a fall-prevention fence in the event of collision of high-energy rockfall.

It is another object of the present invention to provide an anti-rockfall fence using an energy dissipating system that minimizes impact due to rockfall impact on each component by efficiently responding to energy dissipation system due to rockfall impact will be.

Another object of the present invention is to provide an energy dissipating system used in an anti-rocking fence that is installed in an anti-rocking fence to prevent breakage of an anti-rocking fence without penetrating the rockfall preventing fence in the event of a rockfall collision.

It is another object of the present invention to develop a rockfall preventing fence which is superior in performance to a conventional rockfall prevention fence through an energy dissipation system.

In order to accomplish the above-mentioned object, the present invention provides a floor structure comprising: A grid-like wire mesh installed between the struts and the struts; A wire rope installed across the struts and holding the wire mesh; And a wire rope spacing device installed on the wire net to prevent the wire rope from spreading up and down when a fall occurs; And the rockfall preventing fence is installed longitudinally or laterally for every predetermined section of the wire rope installed between the struts to dissipate rockfall energy due to collision of the rockfall through momentary deformation. of; The present invention also provides an anti-rockfall fence using the energy dissipating system.

According to another aspect of the present invention, there is provided an energy dissipating system comprising: a pipe body for receiving an extension of a wire rope inside; And a connection fixing pin penetratingly connected to one side of the pipe body to extend an extension of the wire rope.

Further, in order to achieve the above object, the present invention provides an anti-rockfall fence using an energy dissipating system, wherein the pipe body is formed by stacking one or more bodies.

Basically, the present invention discloses an energy dissipating system that is installed horizontally or laterally at certain intervals of a wire rope applicable to a structure for dissipating various types of impact energy, and dissipates energy due to a collision.

According to another aspect of the present invention, there is provided an energy dissipating system comprising: a pipe body for receiving an extension of a wire rope inside; A connection fixing pin penetratingly connected to one side of the pipe body to extend an extension of the wire rope; And the pipe body is provided with one or more pipe bodies on the inner side thereof.

The present invention provides a support provided in the foundation structure; A grid-like wire mesh installed between the struts and the struts; A wire rope installed across the struts and holding the wire mesh; And a wire rope spacing device installed on the wire net to prevent the wire rope from spreading up and down when a fall occurs; And the rockfall preventing fence is installed longitudinally or laterally for every predetermined section of the wire rope installed between the struts to dissipate rockfall energy due to collision of the rockfall through momentary deformation. of; So that the function of the rockfall prevention fence can be maintained without penetrating the rockfall preventing fence when the rockfall is collided with the rockfall preventing fence.

The present invention also has the effect of effectively coping with the rockfall energy due to the rockfall collision through the energy dissipation system.

The present invention can also be installed on an anti-rocking fence to prevent breakage of the anti-rocking fence without penetrating the anti-rocking fence in the event of a rockfall collision.

1 to 9 show a first embodiment of a rockfall preventing fence using an energy dissipating system according to the present invention,
1 is a whole view of a rockfall preventing fence according to the present invention,
Figure 2 is an enlarged view of the main part of Figure 1 "A" according to the first embodiment of the present invention,
FIG. 3 is an overall perspective view showing an energy dissipating system according to a first embodiment of the present invention, FIG.
Fig. 4 is a front view of Fig. 3,
Fig. 5 is a plan view of Fig. 3
Fig. 6 is a longitudinal sectional view of Fig. 3,
Figure 7 is a cross-sectional view showing the installation of the wire rope and energy dissipating system according to the first embodiment of the present invention,
8 is a longitudinal cross-sectional view of FIG. 7;
FIG. 9 is a sectional view of a rockfall preventing fence using the energy dissipating system according to the first embodiment of the present invention,
10 to 11 show a second embodiment according to the energy dissipation system according to the present invention,
FIG. 10 is a second embodiment of the energy dissipating system according to the present invention,
11 is a third embodiment of the energy dissipation system according to the present invention and its operation state diagram,
12 to 13 show a fourth embodiment of a rockfall preventing fence using the energy dissipating system according to the present invention,
FIG. 12 is a general view of an anti-rocket fence according to a fourth embodiment of the present invention;
Fig. 13 is an enlarged view of the main part of Fig. 10A according to the fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to inform.

1 to 9 show a first embodiment of an energy dissipating system according to the present invention and a rockfall preventing fence using the same.

1 to 3, the anti-rocket fence using the energy dissipating system according to the first embodiment of the present invention includes a support 10 (10A) installed in the foundation structure 1; A grid-like wire mesh 20 installed between the struts 10 and 10A; A wire rope (30) installed across the struts (10) (10A); And a gap holding device (40) for preventing the wire rope (30) from spreading up and down; And an energy dissipating system installed at a predetermined section of the wire rope to dissipate falling rock energy due to the rockfall; .

The pillars 10 and 10A are installed as end portions and intermediate pillars in the form of metal pipes or H beams on the ground or concrete foundation structure 1 as a foundation for forming a rockfall prevention fence. At this time, the distance between the struts 10 and the struts 10A is usually one span, and the middle struts are preferably spaced 3m apart.

In addition, a grid-like wire mesh 20 is installed between one of the spans 10 and 10A to constitute an anti-rocking fence.

The wire mesh 20 is installed in the shape of a net in the form of a net wire.

The wire rope 30 is a reinforcing structure provided between the struts 10 and 10A to hold the wire mesh 20. The both ends of the wire rope 30 in the longitudinal direction are connected to an end fixing device Not shown). At this time, it is preferable that the wire rope passes through the hole of the end fixing device and is fixed with a wire clip (not shown) or the like.

The wire ropes 30 are installed so as to pass through the pillars 10 and 10A in a hole shape at a distance of 100 mm from the lower end point, It is preferable to be installed transversely between the adjacent stanchions.

The gap holding device 40 prevents the wire rope 30 from spreading upward and downward. The U-bolt 41 is fastened to the front surface of the steel plate with a predetermined length.

The wire 20 and the wire rope 30 are twisted and connected to each other by a spiral connection ring (not shown) of the same material as the wire and the wire rope 30, 40 are preferably connected together by a U-bolt 41.

   3 to 8, the energy dissipating system is installed longitudinally or laterally at certain intervals of the wire rope 30 installed between the struts 10 and 10A, A pipe body (110) for internally receiving the bending extension (30a) of the wire rope (30) by dissipating energy through momentary deformation; And a connection fixing pin 120 penetratingly connected to one side of the pipe body 101 to extend the extending portion 30a of the wire rope 30.

It is preferable that the pipe body 110 is a general structure carbon steel pipe in the form of a pipe having a predetermined length.

In addition, the pipe body 110 may have a hole 111 through which the connection fixing pin 120 passes.

Also, it is preferable that the pipe body 110 is provided by 8 or 10 like the wire ropes 30 arranged in one span of the struts 10 (10A).

The connection fixing pin 120 is preferably a bolt and a nut as shown in FIG.

As shown in FIG. 3, the wire rope 30 is inserted into the pipe body 110 and is installed in a U-shape by the connection fixing pin 120.

In addition, the pipe body 110 may be constructed by superimposing one or more other pipe bodies inside the pipe body 110 so as to increase the dissipated energy with respect to the falling rock energy due to a fall rock impact.

Hereinafter, the operation and effect of the anti-rockfall fence according to the present invention will be described.

9 is a sectional view showing the operation of the anti-rockfall fence according to the first embodiment of the present invention.

First, a rockfall is rolled and a shock is applied to a rockfall prevention fence, which can reduce the rockfall energy to penetrate the wire mesh by crushing the wire rope and the wire rope.

9, the pipe body 110 is bent so that the bent elongated latching portion 30a of the wire rope 30 is extended to both sides, as shown in a) It is possible to effectively disperse the falling rock energy through the dissipative energy process of crushing both sides of the body 110 and finally tearing the pipe body 110.

Meanwhile, various embodiments can be provided to have efficient dissipation energy for generation of rockfall energy due to rockfall collision.

10 is a second embodiment of an energy dissipation system used in a rockfall preventing fence according to the present invention and its operating state.

As shown in FIG. 10, one pipe body 100-1 may be overlapped with another pipe body 100-1 in the pipe body 110. FIG.

The overlapping pipe bodies 110 and 110-1 are bent in such a manner that the bent extension portions 30a of the wire rope 30 are extended to both sides as in a) The body 110 (110-1) can be crushed to both sides, and the rockfall energy impact force can be efficiently dispersed in the rockfall energy that continues through the dissipative energy process.

11 is a third embodiment of the energy dissipating system used in the rockfall preventing fence according to the present invention and its operating state.

As shown in FIG. 11, two pipe bodies 100-1 and 100-2 may be further superimposed on the inside of the pipe body 110. FIG.

The pipe bodies 110 and 110-2 are bent in the pipe body 110a and the pipe body 110b as the bent extension portions 30a of the wire rope 30 are expanded to both sides, 110) is crushed to both sides, the rockfall energy impact force can be dispersed efficiently by the dissipative energy process.

Meanwhile, the energy dissipating system may be installed at different positions in the anti-rocking fence for efficient dissipation energy for generating rockfall energy due to rockfall collision.

The energy dissipating system may be installed in the same lateral direction as the longitudinal direction of the pipe body 110 across the wire rope 30.

  12 to 13 show a fourth embodiment of an energy dissipating system used in an anti-rockfall fence according to the present invention. FIG. 12 is a whole state view of an anti-rocket fence according to a fourth embodiment of the present invention, Is an enlarged view of the main part of Fig. 10A according to the fourth embodiment of the present invention.

The anti-rocket fence according to the fourth embodiment of the present invention is the same as the structure and operation of the first embodiment, and the detailed description thereof will be omitted.

The pipe body 110, which is an energy dissipating system according to the fourth embodiment of the present invention, is distorted or torn while the pipe body 110 is momentarily deformed in the longitudinal direction with respect to the lateral direction of the wire rope 30 To provide a structure form that allows for A miter portion may be formed on a portion of the pipe body 110 to induce a tearing position.

The following is the result of a static UTM test on the energy dissipation system: one pipe, two pipes and three pipes.

pipe 1 = 160
Intensity Fy = 235, Fu = 400 Consists of three Consists of two Consists of one Internal strain energy kJ 15.1 15.2 6.7

In addition, the simulation results to confirm how the dissipated energy of the energy dissipation system works in a rockfall prevention fence is as follows.

First, as a simulation for a conventional rockfall prevention fence, the rockfall is 365 kg, and the rockfall is collided at 20,936 m / s and collided with energy of 80 kJ. After the collision, the wire mesh is torn and the wire rope spacing device is bent or crushed. The energy dissipated by the rockfall prevention fence is shown in the table below. The rocks are pierced and have kinetic energy of about 16 kJ. Rockfall protection fences have reduced energy by about 64 kJ.

<Energy dissipation by existing crumbling prevention fence components> Wire rope wire netting landlord Connecting ring Spacer Sum Dissipation energy (kJ) 28.6264 18.8375 6.3808 10.0141 0.6162 64.4750 Total dissipation energy /
Reduced Rockfall Energy (%) 44.3992 29.2167 9.8967 15.5318 0.9557 100.0000

In contrast, the rockfall preventing fence having the energy dissipating system according to the present invention collided rockfall with the energy of 100 kJ under the above conditions.

As the first application example, it is a test to install eight energy dissipation systems in one span of 4 wire ropes from 1.1 m to 1.9 m in a pro-array with a conventional wire and a rockfall prevention fence.

 <Energy dissipation by the components of the anti-rocket fence using energy dissipation system> Wire rope wire netting landlord Connecting ring Spacer Energy dissipation system Sum Dissipation energy (kJ) 36.4884 4.6153 7.8086 3.0411 7.0353 31.0911 90.0799 Total dissipation energy /
Reduced Rockfall Energy (%) 40.5067 5.1236 8.6686 3.3760 7.8101 34.5151 100.0000

As a second application example, 10 additional energy dissipation systems are installed in five ropes of wire rope for 1 span up to 1.1 m to 1.2 m of additional anti-rocking fence among the upper end wire rope 1.

<Energy dissipation by the components of the anti-rocket fence using energy dissipation system> Wire rope wire netting landlord Connecting ring Spacer Energy dissipation system Sum Dissipation energy (kJ) 42.9424 3.2813 5.6329 2.7458 0.4242 38.9972 94.0237 Total dissipation energy /
Reduced Rockfall Energy (%) 45.6719 3.4898 5.9909 2.9203 0.4511 41.4759 100.0000

As a third application example, two energy dissipation systems are installed in a single span of four wire ropes up to 1.1 m to 1.9 m in a conventional wire rope arrangement and an anti-rocking fence.

<Energy dissipation by the components of the anti-rocket fence using energy dissipation system> Wire rope wire netting landlord Connecting ring Spacer Energy dissipation system Sum Dissipation energy (kJ) 37.9079 2.7062 9.7794 1.6621 16.8027 16.8407 85.6990 Total dissipation energy /
Reduced Rockfall Energy (%) 44.2338 3.1578 11.4114 1.9395 19.6066 19.6510 100.0000

As a result of the simulation test, the energy dissipated in the first case was 90kJ, and the wire rope spreads up and down to protect the rockfall, but some of the wire mesh was destroyed. In the second case, the dissipated energy was 94 kJ, and some of the wire mesh was destroyed near the rockfall collision point, but the rockfall was not penetrated. In the third case, the dissipated energy was 86 kJ, and there were no components where the rockfall rate was reduced and destroyed. From all the simulation results, it can be seen that the energy dissipation system is absorbing some energy.

The following is the result of the physical test. As a result, the energy dissipation system is installed, the rockfall energy is 100kJ, the rockfall weight is 370kg, the rockfall drop height is 28m, the energy dissipation system is set up with 2 pipes, It is the first case to install each one.

1) The fall position of the rockfall collided at 122.6cm and 150cm from the base point.

2) Speed at collision with rockfall: 22.56m / s

3) Kinetic energy at rocket collision: 94.16 kJ

4) Rockfall defense: Rockfall defense

Two pipes of the energy dissipation system were laid on top of each other, but there were only a few deformations in the vicinity of the point of impact and no deformation.

The second case is the installation of energy dissipation system, rockfall energy 100kJ, rockfall weight 370kg, rockfall drop height 28m, energy dissipation system 1 pipe, energy dissipation system 1 It is the case that eight are installed in span.

1) The dropping position of the rockfall was 140.5cm, and it collided 139.9cm from the foundation point.

2) Speed at collision with rockfall: 23.09m / s

3) Kinetic energy in collision with rockfall: 98.63 kJ

4) Rockfall defense: Rockfall defense

Rockfall protection fence defended the rockfall. We can judge that it is possible to defend against 90kJ rockfall in the field.

Although the present invention has been shown and described with reference to preferred embodiments as described above, it is not limited to the above-described embodiments and those skilled in the art without departing from the spirit of the present invention. Various modifications and variations are possible without departing from the spirit of the present invention and equivalents of the claims to be described below. In addition, the energy dissipation system of the present invention can be applied to any type of fence having a wire rope in addition to a rockfall prevention fence.

10, 10A: support 20: wire mesh
30: wire rope 30a:
40: space maintaining device 41: U-bolt
110: pipe body 120: connection fixing pin

Claims (6)

With a plurality of props installed in the basic structure
As applied to the fence configured to include a wire rope installed across the support and the support,
The energy dissipation system, characterized in that coupled to the wire rope installed between the struts, dissipates the energy due to the collision through deformation.
The method according to claim 1,
The energy dissipation system includes a pipe body for receiving an extension stop of the wire rope inwardly;
A connection fixing pin penetratingly connected to one side of the pipe body to extend an extension of the wire rope; Energy dissipation system comprising a.
The energy dissipation system of claim 2, wherein the pipe body further has one or more layers of pipe bodies.
A support (10) (10A) provided in the foundation structure (1);
A grid-like wire mesh 20 installed between the struts 10 and the struts 10A;
A wire rope (30) installed across the struts (10) (10A) and holding the wire mesh (20); And
A wire rope spacing device 40 installed in the wire mesh 20 to prevent the wire rope 30 from spreading up and down when a fall occurs; A rockfall prevention fence is made,
The anti-rockfall fence
An energy dissipation system installed at predetermined intervals of the wire ropes 30 installed between the support poles 10 and 10A to dissipate rock energy through deformation; Rockfall prevention fence using an energy dissipation system, characterized in that further comprises.
5. The energy dissipation system of claim 4 wherein said energy dissipation system is
A pipe body (110) for accommodating the extension catching portion (30a) of the wire rope (30) inside;
Using an energy dissipation system, characterized in that it comprises a connecting fixing pin 120 for penetrating through the one side of the pipe body 110 is extended extension engaging portion (30a) of the wire rope 30 Rockfall Fence.
6. The rockfall prevention fence using an energy dissipation system according to claim 5, wherein the pipe body further has one or more layers of pipe bodies.

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