KR20140037610A - Support structure and guard fence - Google Patents

Support structure and guard fence Download PDF

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Publication number
KR20140037610A
KR20140037610A KR1020120103968A KR20120103968A KR20140037610A KR 20140037610 A KR20140037610 A KR 20140037610A KR 1020120103968 A KR1020120103968 A KR 1020120103968A KR 20120103968 A KR20120103968 A KR 20120103968A KR 20140037610 A KR20140037610 A KR 20140037610A
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KR
South Korea
Prior art keywords
axial force
absorber
force absorber
inclined surface
strut
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KR1020120103968A
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Korean (ko)
Inventor
가즈키 후쿠나가
Original Assignee
닛폰 제니쓰 파이프 가부시키가이샤
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Priority to KR1020120103968A priority Critical patent/KR20140037610A/en
Publication of KR20140037610A publication Critical patent/KR20140037610A/en

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S256/00—Fences
    • Y10S256/01—Compensator, spring

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

In the present invention, even when the inclined surface has an ups and downs, the standing angle and the book height of the base of the protection net can be kept constant, and the strut structure exhibits normal damping performance. To this end, in the present invention, the axial force absorber is composed of a plurality of carbon rods, the modified derivative is composed of a rigid material, and the axial force acting on the modified derivative is configured to guide the axial force absorber through the connecting member.

Description

SUPPORT STRUCTURE AND GUARD FENCE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to energy absorption technology suitable for the absorption of dynamic loads such as rockfall, crushed earth and avalanches, or static loads (hereinafter referred to as "energy"), such as snowfall, and more particularly energy. It relates to a strut structure and a protective measure that can be effectively absorbed.

Generally, the pillars in this kind of protection measure are formed of rigid materials such as steel or concrete filled steel pipes to counter the bending and axial force, but the conventional pillars are heavy and difficult to carry into the installation site of a mountainous area. In addition, installation work in the field is also relied on in the middle, and there is a problem in workability.

Patent Document 1 discloses a strut structure in which a main stiffness of high rigidity, a high stiffness inclined strut and a plurality of connecting ropes are combined, and an avalanche protection measure using the same.

The strut structure is formed by intersecting both struts in an X shape, fixing the base end of the inclined strut to the inclined surface with a ground anchor, and connecting the free end and the base end of the two struts with connecting ropes, respectively. The protective net fixes its upper and lower sides to the upper part of the main stock and to the lower part of the inclined post.

The eye load acting on the protection net is opposed to the compressive strength of both shores and the tension of the connecting rope.

In order to solve the problem of the protection measures disclosed in Patent Document 1, the applicant first adopts a strut structure composed of a plurality of bars having a flexible column and an inclined strut, and a protective measure using the same. It proposed (patent document 2).

Japanese Patent Publication No. 2007-63831 Japanese Patent Publication No. 2010-255648

The protection measures described in Patent Document 1 above have the following problems.

(1) Although the main column and the inclined posts have high compressive strength, they do not have a function of absorbing load.

Therefore, when the axial force beyond the assumption acts on the main column and the inclined column, the column is suddenly buckled and destroyed, and the book function is lost.

(2) When the load is applied at high speed or locally, such as avalanche, rockfall, etc., the protection measures are applied not only to compression but also to bending and torsion.

Since the strut structure cannot cope with bending and twisting, the stability balance of the strut structure tends to collapse. When the balance collapses, the strut structure breaks down unexpectedly.

(3) Although the base end of the main column and the inclined strut which constitute the strut structure allows a rotational movement along the inclined plane inclined direction, the rotational movement in a direction orthogonal to the inclined plane inclined direction is constrained.

Therefore, when a large force acts in the direction orthogonal to the inclination of the inclined surface, the axial point of the base end of both struts will be destroyed.

(4) When some of the plurality of strut structures are destroyed due to the factors (1) to (3) described above, the destruction of the strut structure is serially enlarged, and the overall protection measures lose their function.

(5) In order to recover the damaged strut structure, it is necessary to newly replace the strut structure, which requires a lot of time, effort and cost.

The protection measures described in Patent Document 2 have the following improvements.

(1) In order to distribute the load appropriately to the main column and the inclined column, the balance between the elasticity and hardness of each column, the crossing angle of each column, the length of the connecting rope, and the installation distance of the lower part of the column are designed models. It is important to install as is.

Since the slope of the mountain has a large number of ups and downs, not a flat constant gradient, it is difficult to install the strut structure according to the above-described design model.

Therefore, if the strut structure is installed in response to the ups and downs of the individual installation site at the expense of the design model, the installation distance between the bases of both struts and the standing angle of the protective net become non-uniform, especially the protective net is largely The disadvantage is that the height of the book is lowered in the photo place.

(2) The strut structure has a structure in which the share ratio of the damping action by the main column and the inclined strut is determined.

As described above, if the crossing angle and the installation interval of both shores are affected by the ups and downs of the inclined surface, the sharing ratio of the damping action is changed in units of each strut structure, and it is normal to estimate the damping performance of each strut structure. it's difficult.

In particular, when the damping balance of each strut elastically deforms, the original damping performance cannot be exhibited, and the height of the book is extremely deformed when subjected to the first impact and cannot be coped when subjected to subsequent impact. There is also.

(3) The dimensional balance of the strut structure is designed to have some margin, but when the dimensional balance of the strut structure exceeds the allowable value, it affects the energy absorption performance and cannot exhibit stable performance.

(4) In order to avoid the influence of the undulation of the inclined surface and to maintain the dimensional balance of the strut structure, it is necessary to design the dimensions of each material constituting the strut structure separately, which makes the processing and assembly of the material complicated.

(5) When assembling the strut structure, it is difficult to assemble because both struts are bent.

This invention is made | formed in view of the above point, Comprising: It aims at providing at least one support structure and an impact absorption book.

<1> The strut structure can exhibit normal damping performance.

<2> Even if the site of the ups and downs of the inclined surface is changing, maintaining the standing angle and the book height of the base of the protection net constant.

<3> To efficiently absorb the energy acting on the back surface of the protective net while avoiding the destruction of the strut structure.

<4> Does not break even if bending or torsion is applied to the strut structure.

<5> Excellent responsiveness not only to static loads such as snow pressure, but also to dynamic loads such as falling rocks and avalanches.

<6> The strut structure has self-healing property and is excellent in recoverability of the shock absorber.

&Lt; 7 > To improve the workability and reduce the cost by reducing the weight of the shock absorber.

The first invention of the present application is a strut structure for a shock absorbing book that provides a protective net with a space therebetween, the axial force absorber provided so that the base end is fixed to an inclined surface so as to be freely hardened, and the axial force absorber and Arranged alternately, the base is fixed to an inclined surface and is mounted so as to be freely hardened, between the axial force absorber and the free end of the modified derivative, between the free end of the modified derivative and the base of the axial force absorber. And first to third connecting members each connected between the free end of the axial force absorber and the base end of the axial force absorber, wherein the axial force absorber is composed of a plurality of carbon shafts constraining both ends, and the deformation The derivative is made of a rigid material, and the length of the first or second connecting material can be adjusted by mounting a length adjusting tool on a part of the first or second connecting material. The axial force to the configuration and operation in the derivative strain, was constructed to direct the axial force to the absorbent body through the first to third consolidated.

Further, in the strut structure for the shock absorber, the free end between the plurality of shots is connected with a binding plate, the nut is screwed into the shots to position the binding plate, and the mounting position of the binding plate is provided. It is configured to be displaceable along the bullet span.

In the strut structure for the impact absorbing book, an anchor is provided to fix the base ends of the axial force absorber and the modified derivative, respectively.

The 2nd invention of this application is a shock absorption book provided with the some structure | strand structure set up at intervals, and the protection net provided tautly between the structure | structures, The axial force absorber which used any of the structure | strands mentioned above is already used. While fixing the proximal end to the bone-side inclined surface, the proximal end of the modified derivative arranged to intersect with the axial force absorbing body is fixed to the mountain-side inclined surface, and the above strut structure is installed upright, and the freedom of the axial force absorber constituting the adjacent strut structures is provided. The upper edge of the protection net is suspended between the steps, characterized in that the installation is taut.

Moreover, in the said shock absorption measure, the lower side of a protection net is attached to the base end of the said modified derivative, or the lower side of a protection net is fixed to a mountain side inclined surface.

The term "energy" in the present invention includes not only dynamic loads such as falling rocks and avalanches, but also kinetic energy and potential energy due to static loads such as snow pressure.

The term "elastic deformation" in the present invention includes compression deformation in the longitudinal direction of the axial force absorber, torsional deformation using the longitudinal direction as the axis, and bending deformation in all other directions.

According to the present invention, at least one of the following effects can be obtained.

(1) The strut structure formed by combining the axial force absorber of the oil structure and the modified derivative of the steel structure has a clear role of a member for transmitting energy (such as a modified derivative) and a member for absorbing energy (axial force absorber). .

Therefore, each strut structure can exhibit the damping performance normally even if the inclination of the inclined surface is affected.

(2) Since the roles of the axial force absorber and the deformable derivative are clear, the energy absorption amount of the strut structure as a whole can be accurately calculated, and the member can be selected according to the role.

(3) Even if there is ups and downs on the inclined surface, by adjusting the whole length of a connection material with the length adjustment tool interposed in the connection material, the standing angle of the base of a protection net and the height of a book can be kept constant.

(4) At the free end of the bearing force absorber, the standing angle of the bearing surface of the bearing net and the back of the shielding net can be maintained while maintaining a fixed distance between the bearing absorber and the deformable derivative by arbitrarily adjusting the drooping height of the upper side of the guard net. Maintain height more accurately.

(5) The elastic force can be elastically deformed while maintaining the uprightness of the axial force absorber to allow absorption, thereby efficiently absorbing the energy acting on the bottom surface of the protective net.

(6) Since the axial force absorber exerts a cushioning function, it is possible to avoid the destruction of the deformable derivative and the plurality of connecting members, thereby preventing the sudden loss of function of the shock absorber.

(7) The structural member of a strut structure can be simplified, and manufacturing cost can be reduced significantly.

(8) By configuring the axial force absorber with a plurality of carbon shots, elastic deformation can be performed in all directions. Therefore, the deformation and the torsion caused by the load from the unexpected direction can be flexibly followed in the deformation without excessive stress being concentrated at the base between the shots.

(9) Since the axial force absorber and deformable derivatives constituting the strut structure can be reduced in weight, the transportability and assemblability of the strut structure to the site can be improved, and the workability can be improved and the cost can be reduced.

(10) Since the strut structure has self-healing property, the recoverability of the shock absorber is excellent.

(11) Sufficient energy absorption performance can be exhibited not only for static loads such as snowfall, but also for dynamic loads such as falling rocks and avalanches.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the shock absorbing book omitting the part which concerns on this invention.
2 is a side view of the strut structure according to the first embodiment.
3 is a model view of the strut structure seen from the slope side.
4 is an enlarged view of the base of the axial force absorber.
5 is an enlarged view of the base of the modified derivative.
6 is a model diagram of an ideal strut structure.
Fig. 7 is an explanatory diagram of a method of installing a strut structure on a sloping slope with a relief, where (A) is a model diagram of a strut structure when installing on a slope of a backhill, and (B) is a case of installing on a slope of a backhill. Diagram of the strut structure.
8 is a model view of an ideal strut structure with clearance lengths.
9 is an explanatory view of a method for installing a strut structure on a sloping slope with a relief, where (A) is a model diagram of a strut structure when installing on a slope of a backhill, and (B) is a case of installing on a slope of a backhill Diagram of the strut structure.
10 is a model diagram of a shock absorbing measure at the time of energy action.
11 is a side view of the strut structure according to the third embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> shock absorption book

The perspective view of the impact absorption book of this invention is shown in FIG. 1, the side view of the strut structure 10 is shown in FIG. 2, and the model figure of the strut structure 10 seen from the inclined side bone side is shown in FIG.

The impact absorption book which concerns on this invention is comprised from the several support | pillar structure 10 provided in the space | interval on the inclined surface 11, etc., and the protection net 40 provided in tension between the support structure 10. As shown in FIG.

In addition, in FIG. 1, the code | symbol 18 is a single or several stay rope provided in tension between the strut structure 10 of the edge part, and the inclined surface 11. As shown in FIG.

<2> strut structure

The strut structure 10 is a structure having both a function of absorbing energy received from the receiving surface 41 and a strut function, and is fixed to the inclined side of the bone so as to freely rotate on the inclined surface 11. (20), the deformable derivative (30), which is arranged to intersect the axial force absorber (20), is fixed to the mountain-side inclined surface to freely rotate on the inclined surface (11), and the axial force absorber (20) Non-stretchable first to third connecting members, which are connected between each free end of the modified derivative 30 and between the axial force absorber 20 and each free end of the modified derivative 30 and the proximal end (inclined surface 11), respectively. (12-14) is provided.

The intersection angle between the axial force absorber 20 and the deformable derivative 30 and the total length of each of the coupling members 12 to 14 are used to supply energy acting on the lower surface 41 to the axial force absorber 30 and each of the coupling members 12 to 14. While dispersing and transmitting in ()), the axial force absorbing body 20 is connected to act as an axial force.

Hereinafter, the detail of the support structure 10 is demonstrated in detail.

<2. 1> axial force absorber

The axial force absorber 20 is an elastic structure having a damper function for absorbing energy acting on the receiving surface 41 by compressive deformation, and is composed of a plurality of carbon shafts 21 converged at both ends.

In this example, the case where the axial force absorber 20 is composed of two carbon spans 21 and 21 will be described. However, the number of carbon spans 21 may be appropriate and may be one or three or more.

As a raw material of the carbon spacing 21, metal materials, such as a steel bar and spring steel, and elastic materials, such as resin, can be applied, for example.

A male screw is formed on the circumferential surface of the bullet stem 21, and the hanging height of the upper side of the protective net 40 can be adjusted.

<2. 1.1> Structure of proximal side of axial force absorber

As shown in FIGS. 2-4, the base end of the carbon spacing 21 is pivotally supported by the support shaft 22 so that the support bracket 24 of the ground plate 23 can rotate freely, and the ground plate 23 Is anchored to the inclined surface 11.

<2. 1.2 Structure of free end of axial force absorber

As shown to FIG. 2, 3, the upper and lower pair of nuts 26 and 26 are screwed in the free end of each carbon case 21. As shown to FIG.

Between the free ends of the plurality of bullet stems 21, the upper and lower pairs of binding plates 27 and 27 are inserted and arranged so that the free ends of the two bullet stems 21 and 21 are not detachably bound. .

The spacer tube 28 and the binding plates 27 and 27, which are placed on the upper portion of each carbon case 21, can be slidably moved while maintaining the restraint with respect to the carbon case 21, and a pair of upper and lower nuts 26 And 26, the mounting position of the binding plates 27 and 27 can be adjusted to arbitrary heights along the bullet span 21 by moving up and down the screw mounting position.

In addition, although each binding board 27 and 27 and the pipe | tube 28 are separate bodies, the lower binding board 27 and the pipe | tube 28 may be integral structures.

An end of the upper rope 15 for dropping the protection net 40 is moored inseparably from the pipe 28 at the upper portion of each carbon case 21, and the binding plate 27 Each upper end of the first and third connecting members 12 and 14 is inseparably moored.

The means for adjusting the hanging height of the upper side of the protection net 40 is not limited to the nuts 26 and 26, and the binding board 27 is attached to arbitrary positions of the bullet stem 21, such as pinning and welding. It is possible to apply known positioning means capable of positioning.

<2. 2> modified derivative

The deformable derivative 30 intersects with the deformable derivative 30 in a form positioned between the carbon shafts 21 and 21 constituting the axial force absorber 20.

The modified derivative 30 is a rigid material which functions to induce energy acting on the receiving surface 41 as the axial force of the axial force absorber 20, and is formed of, for example, a steel pipe.

In order to achieve the above function, the compressive strength of the modified derivative 30 has a greater relationship than the axial force absorber 20.

<2. 2. 1> Pivot support structure at the base of modified derivative

As shown in FIG. 2, the base end of the modified derivative 30 is pivotally supported by the support shaft 31 so as to be freely rotatable to the support bracket 33 of the ground plate 32, and the ground plate 32. The anchor 34 is poured into the inclined surface 11.

As enlarged in FIG. 5, each side connecting piece is formed by connecting the lower end of the third connecting member 14 to the front connecting piece 32a, which is formed by standing on the ground plate 32, and is formed by standing in the left and right oblique directions. The lower ropes 16 and 16 connected to the lower side of the protection net 40 are connected to 32b and 32b.

<2. 2. 2> Free End of Modified Derivatives

As shown in FIG. 2, the free end of the deformable derivative 30 is provided with protrusions 35 for hanging, and the first and second connecting members 12 and 13 moored to the free end of the deformable derivative 30. It is possible to position and connect the loop portion of one end.

The mooring means of the first and second connecting members 12, 13 is not limited to the projection 35, and known mooring means can be applied.

<2. 3> connecting material

Each connecting member 12-14 can be comprised from the rope, bar, steel plate, etc. which are excellent in tensile strength, for example, steel or fiber.

The first connecting member 12 connects between the free end of the axial force absorber 20 and the free end of the strain inductor 30, and the second connecting material 13 is the free end of the strain inductor 30 and the base end of the axial force absorber 20. The third connecting member 14 connects between the free end of the modified derivative 30 and the base end of the modified derivative 30.

In addition, you may comprise the 1st-3rd connecting material 12-14 by one continuous member.

In the present invention, since the axial force absorber 20 has a shock absorbing function, the burden of the tension on each of the connecting members 12 to 14 and the burden of the anchors 25 and 34 become smaller than in the prior art.

In this invention, the case where the length adjustment tool 17 which can adjust the length in the field in the middle of the 2nd connecting material 13 is interposed.

The length adjuster 17 can apply a well-known adjuster which can withstand tension other than a turn buckle.

<3> protection net

The protective net 40 is a structure having a receiving surface 41, and includes, for example, a wire net or a rope net, or a known net in combination thereof.

In addition, the protective net 40 may be divided into one span unit of the strut structure 10, in addition to having a total length that spans a plurality of spans.

The protection net 40 is arrange | positioned at the mountain side inclined surface, is installed, and the upper side is attached to the free end of the axial force absorber 20, and is carried out.

In the present example, the upper side of the protective net 40 is attached to the upper rope 15 transversely between the free ends of the axial force absorber 20, and the lower side of the protective net 40 is attached to the modified derivative 30. It is attached to the lower rope 16 which spans between base ends.

[Assembly of shock absorption book]

Next, the method of assembling the shock absorber will be described.

Import of <1> material

The strut structure 10 and the protection net 40 which comprise a shock absorption book are carried in to the site.

In bringing in the material, since the carbon rod 21 and the connecting members 12 to 14 made of the steel rods constituting the strut structure 10 are subdivided to a weight that can be carried by a worker, the weight is reduced, Even if the site is mountainous, it is easy to bring in materials.

<2> assembly of the strut structure

With reference to FIG. 1, 2, the assembly example of the support structure 10 is demonstrated.

After setting the ground plates 23 and 32 to each of the anchors 25 and 34 placed at intervals on the inclined surface 11, the tops of the anchors 25 and 34 are fixed with nuts.

Next, while pivoting the base end of the axial force absorber 20 via the support shaft 22 on the lower mounting plate 23, the support shaft 31 is interposed on the upper mounting plate 32. Thus, the base of the modified derivative 30 is pivotally supported.

The binding plates 27 and 27 and the pipe | tube 28 are set in the free end of the axial force absorber 20 which crossed the modified derivative 30, and the nuts 26 and 26 are screwed on both sides.

Finally, the non-elastic first to third connecting members 12 to 14 are connected between the free ends and the proximal ends of the axial force absorber 20 and the modified derivative 30 to complete the assembly of the strut structure 10. .

Since the deformable derivative 30 is not deformed even if the axial force absorber 20 is somewhat bent, the assembling operation of stacking the strut structure 10 in three dimensions by intersecting both members 20 and 30 is easy.

In addition, since the upright installation work of the axial force absorber 20 and the deformable derivative 30 can be performed by a manpower, a crane or the like is not necessary for assembling the strut structure 10.

<3> Assembling and mounting of protective net

The upper rope 15 is transversely spanned between the tops of each neighboring strut structures 10, ie between the tops of the axial force absorbers 20. The lower rope 16 is transversely intersected between the lower portions of neighboring strut structures 10, ie, between the ground plates 32 at the proximal ends of the modified derivatives 30.

The upper and lower sides of the protection net 40 are mounted so as not to be separated from each other between the upper and lower ropes 15 and 16 to complete the assembly of the shock absorbing book.

In Fig. 2 showing the completed shock absorbing book, the weight of the axial force absorber 20, which is inclined toward the inclined surface, is dispersed and supported by the inclined surface 11 and the rigid deformable derivative 30 through the connecting members 12 and 13. do.

The weight of the deformable derivative 30 which is inclined toward the inclined surface bone is dispersed and supported by the inclined surface 11 and the axial force absorber 20 through the connecting members 12 and 14.

The weight of the protection net 40 is dispersed and supported by the inclined surface 11 and the rigid deformation | transformation derivative 30 through the axial force absorber 20 and the connection material 12,13.

As described above, the axial force absorber 20 and the deformable derivative 30 constituting the strut structure 10 are balanced with each other to maintain a stable posture.

What to do if there is ups and downs on the slope

In order for a shock absorbing measure to complete the capturing function of an original rockfall etc., the standing angle of the receiving surface 41 of the protective net 40 is kept constant, and the height of the receiving surface 41 of the protective net 40 is maintained. It is required to secure (book height) sufficiently.

If the dimensional length of each member constituting the strut structure 10 is a certain standard (standard dimension), it is affected by the ups and downs of the inclined surface 11, and the standing angle (angle with respect to the horizontal or vertical) of the receiving surface 41 The book height cannot be aligned uniformly.

Therefore, in this invention, when providing the strut structure 10 in the inclined surface 11 with relief, it copes with the following method.

<1> Action 1

The model figure of the strut structure 10 which maintained the ideal dimension balance in FIG. 6 is shown.

In this figure, L is the installation distance (inclined distance) of the base of the axial force absorber 20 and the modified derivative 30, H is the height of the book of the protection net 40, and x is the total length of the 1st connection material 12. When the total length of the second connecting member 13 is y, in this coping method, the total length of the axial force absorber 20 and the deformable derivative 30, the book height H of the protective net 40, and the first connecting member ( The coping method on the premise that the total length x of 12) is not changed will be described.

FIG. 7A shows a rear downhill (or front uphill) state in which the inclined surface 11 is inclined redundantly at an angle of the gradient θ 1 compared to the reference gradient of FIG. 6, and FIG. 7B is an inclined surface (11) shows a back uphill (or front downhill) state inclined in the reverse direction at an angle of the gradient θ 2 as compared with the reference gradient in FIG. 6.

As shown in FIG. 7A, when the inclined surface 11 is downhill, the installation distance L 1 of the proximal end of the strut structure 10 is provided so that the protection net 40 avoids excessive hardness toward the inclined surface valley side. Shorten.

If only the installation distance L 1 is shortened, the whole dimension balance will fall.

Therefore, by extending the adjusting tool 17 and lengthening the total length y 1 of the second connecting member 13, it is possible to maintain a good overall dimensional balance.

As shown in FIG. 7B, when the inclined surface 11 is uphill, the installation distance L 2 of the proximal end of the strut structure 10 is provided so that the protection net 40 avoids excessive hardness toward the inclined surface peak side. Lengthen.

If only the installation distance L 2 is made long, the whole dimension balance will fall.

Therefore, by shortening the total length y 2 of the 2nd connecting material 13 using the adjustment tool 17, the favorable dimension balance of the whole can be maintained.

In this coping method, the shape of a triangle formed of three sides of the protective net 40, the first connecting member 12, and the modified derivative 30 and the length of each side do not change.

As described above, only the operation of adjusting the total length y of the second connecting member 13 in accordance with the gradient of the inclined surface 11 at the installation site maintains the ideal dimensional balance, and adjusts the standing angle and the book height of the receiving surface 41. You can keep it constant.

<2> Countermeasure 2

The model figure of the strut structure 10 which maintained the ideal dimension balance in FIG. 8 is shown.

In the present coping method, the total length of the axial force absorber 20 and the deformable derivative 30, the height of the book H of the protective net 40, and the total length x of the first connecting member 12 are not changed. However, this coping method is based on the premise that the installation distance L of the axial force absorber 20 and the modified derivative 30 is not changed.

The axial force absorber 20 used in the present coping method is composed of a long span of carbon in the total length of the axial force absorbing body 20 as compared with the coping method 1, and the free length part 20a is formed at the free end of the axial force absorbing body 20, and the nut ( It is a structure which can arbitrarily adjust the drooping height of the upper side of the protective net 40 by rotating operation 26).

The clearance length portion 20a indicates a section from the screw attachment position of the nut 26 to the tip of the axial force absorber 20, and the length of the clearance length portion 20a is changed by displacing the screw attachment position of the nut 26. Is changed.

As shown in FIG. 9 (A), when the inclined surface 11 is downhill, the adjusting tool 17 is extended to operate the second connection member 13 in order to avoid the protection net 40 from being inclined toward the inclined surface valley side. By lengthening the total length y 1 of), and by displacing the nut 26 on the axial force absorber 20 toward the tip side, it is possible to keep the standing angle and the book height of the receiving surface 41 constant.

As shown in FIG. 9B, when the inclined surface 11 is uphill, the adjusting tool 17 is shortened to avoid the protection net 40 from being inclined toward the inclined surface. By shortening the overall length y 2 of the connecting member 13 and displacing the nut 26 on the axial force absorber 20 toward the proximal side, it is possible to keep the standing angle and the book height of the receiving surface 41 constant. do.

Also in this coping method, the shape of the triangle formed of three sides of the protective net 40, the first connecting member 12, and the modified derivative 30 and the length of each side do not change.

In this coping method, the operation of adjusting the total length y of the second connecting member 13 according to the gradient of the inclined surface 11 at the installation site, and the operation of adjusting the position of the nut 26 on the axial force absorber 20. While maintaining the installation distance L between the axial force absorber 20 and the deformable derivative 30 constant, the ideal dimensional balance can be maintained, and the standing angle and the book height of the receiving surface 41 can be kept constant.

Said measures 1 and 2 are divided according to the situation of the site or used together.

[Energy Absorption of Shock Absorber]

Next, based on FIG. 10, the energy absorption mechanism by an impact absorption measure is demonstrated.

<1> deflection of protective net

When energy acts on the receiving surface 41, the protection net 40 deflects toward the inclined side bone side, and a part of energy is attenuated by the bending deformation of the protection net 40. FIG.

<2> uncompressed deformation of the modified derivative

Tension is generated in the first and second connecting members 12 and 13 as the axial force absorber 20 tries to rotate in a clockwise direction about the base.

The tension on the first and second connecting members 12 and 13 acts as an axial force with respect to the deformable derivative 30 which is inclined toward the inclined bone side, but is supported by the deformable derivative 30 without compressive deformation due to its rigidity.

<3> Hardness Constraints of Modified Derivatives

In addition, the free end of the deformable inductor 30 is supported by the second connecting member 13 connected to the inclined surface 11 and the first connecting member 12 connected to the free end of the axial force absorber 20. Hardness angle of 30 hardly changes, and the hardness of modified derivative 30 is restrained.

Therefore, energy acting on the modified derivative 30 can be induced to the axial force absorber 20.

<4> Rotational Motion Restraint of Axial Force Absorber

At the same time, the axial force absorber 20 attempts to rotate in a clockwise direction about the base end, causing tension in the first and second connecting members 12 and 13.

The tension acting on the first and second connecting members 12, 13 is finally supported by the anchor 25, thereby restraining the clockwise rotational movement of the axial force absorber 20.

<5> compressive deformation of the axial force absorber

The combined force of the tension generated by the protection net 40 and the tension generated by the first and second connecting members 12 and 13 acts as an axial force on the axial force absorber 20.

When the axial force generated in the axial force absorber 20 exceeds its deformation strength, the axial force absorber 20 is compressively deformed.

Energy is efficiently absorbed by the compressive deformation of the axial force absorber 20.

In particular, since only the axial force absorber 20 is an energy absorbing member, it is easy to calculate the energy absorbing performance and exhibit stable energy absorbing performance.

In addition, even when large energy is applied, the axial force absorber 20 becomes a cushion so as to avoid the breakage of the first and second connecting members 12 and 13 and the buckling failure of the deformable derivative 30, so that the function of the shock absorber can be achieved. There is no accidental loss.

In addition, even when the cross section of the inclined surface 11 is bent or torsionally acts on the axial force absorber 20, only the free ends of the bullet shafts 21 and 21 constituting the axial force absorber 20 are bent or deformed or twisted. As a result, the bending force and the torsional force do not act on the base ends of the bullet stems 21 and 21.

Therefore, even if bending or torsion acts on the axial force absorber 20, it is not destroyed.

As described above, the shock absorbing measure according to the present invention is configured to transmit the energy received from the protection net 40 as the axial force only by the axial force absorber 20, and as a tension to the connecting members 12 and 13, which are stay materials, The axial force acting on the axial force absorber 20 can be compressed and deformed in the axial force absorber 20 while maintaining the uprightness to efficiently absorb energy.

Moreover, since the support structure 10 has a buffer function, the tension load of each connecting material 12 and 13 and the load burden of each anchor 23 and 34 can be made small.

<6> after the disappearance of energy

After the generation factor of energy is removed from the protection net 40 (the receiving surface 41), the axial force absorber 20 constituting the strut structure 10 returns to its original standby position by its elastic restoring force. .

As the strut structure 10 is restored, the protective net 40 is also pulled back to its original position.

Therefore, the state before the action of energy can be maintained and the function of the shock absorber can be maintained continuously.

For example, in the case where the energy generation factor is the snow pressure, when the snow melts, the axial force absorber 20 naturally returns to its original position, so that the function of the shock absorber always remains without any special treatment. Can be.

Even if the axial force absorber 20 and the deformable derivative 30 constituting the strut structure 10 are deformed or destroyed, only the damaged material can be replaced easily and in a short time.

In Example 1, the form which fixed the lower side of the protective net 40 to the base of the modified derivative 30 was demonstrated.

By dropping the protective net 40 at the free end of the axial force absorbing body 20, the weight balance can be maintained and the stable posture of the strut structure 10 can be maintained, so that the lower side of the protective net 40 is fixed to the mountain-side inclined surface. It is possible.

Since the lower side of the protection net 40 is fixed to the mountain-side inclined surface, the length of the inclined surface inclined direction of the protection net 40 can be increased, and the amount of deflection of the protection net 40 can be increased. There is an advantage that the energy absorption performance is increased.

In Example 1, 2, although the form which attached the length adjusting tool 17 to the 2nd connecting material 13 was demonstrated, you may attach the length adjusting tool 17 to the 1st connecting material 12.

Or as shown in FIG. 11, the length adjusting opening 17 is attached to the 1st connecting material 12 and the 2nd connecting material 13, or the length adjusting opening 17 is attached to all the connecting members 12-14. You may also

By increasing the interposition of the length adjusting tool 17, the installation angles of the axial force absorber 20 and the deformable derivative 30 can be individually adjusted in accordance with the ups and downs of the inclined surface 11.

Moreover, by combining with Example 2, even if it is the site | variety to which the various reliefs exist in the inclined surface 11, there exists an advantage that the installation work which kept the standing angle and the book height of the receiving surface 41 constant becomes easy.

10: strut structure 12: first connecting member
13: second connecting member 14: third connecting member
15: upper rope 16: lower rope
17: length adjuster 20: axial force absorber
21: bullet shot 22: support shaft
30: modified derivative 31: support shaft
40: protective net 41: receiving

Claims (9)

As a strut structure for the shock absorption fence which installs a protective net taut at intervals,
An axial force absorber mounted upright to fix the base to an inclined surface so as to be free of hardness;
A modified derivative which is disposed so as to intersect with the axial force absorber and fixed freely on the inclined surface to be freely hardened,
And a first to third connection member connecting the free end of the axial force absorber and the modified derivative, between the free end of the modified derivative and the base end of the axial force absorber, and between the free end of the axial force absorber and the base end of the axial force absorber, respectively. ,
The axial force absorbing body is composed of a plurality of bullet shafts constrained at both ends,
The modified derivative is composed of a rigid material,
A length adjusting tool is mounted on a part of the first or second connecting member so as to adjust the length of the first or second connecting member,
A support structure for a shock absorbing book, wherein the axial force acting on the deformable derivative is configured to be guided to the axial force absorber through the first to third coupling members. The method of claim 1,
The coupling plate is connected between the free ends of the plurality of shots with a binding plate, and the nut is screwed between the shots to position the binding plate, and the mounting position of the binding plate is displaceable along the shot. Strut structure of shock absorber to make. The method of claim 1,
A support structure, characterized in that it comprises an anchor for fixing the base end of the axial force absorber and the modified derivative, respectively. As a shock absorber provided with a plurality of strut structures installed at intervals and a protective net provided between the strut structures,
Using the strut structure of claim 1,
The proximal end of the axial force absorber is fixed to the bone-side inclined surface, and the proximal end of the modified derivative arranged to intersect with the axial force absorber is fixed to the mountain-side inclined surface, whereby the support structure is erected and installed.
A shock absorbing book, characterized in that the upper side of a protective net is suspended and provided between the free ends of the axial force absorbers constituting the adjacent strut structures. 5. The method of claim 4,
The lower side of the protective net is attached to the base of the said modified derivative, The shock absorbing book characterized by the above-mentioned. 5. The method of claim 4,
The shock absorbing book, characterized in that the lower side of the protection net is fixed to the mountain-side slope. As a shock absorber provided with a plurality of strut structures installed at intervals and a protective net provided between the strut structures,
Using the strut structure of claim 2,
The proximal end of the axial force absorber is fixed to the bone-side inclined surface, and the proximal end of the modified derivative arranged to intersect with the axial force absorber is fixed to the mountain-side inclined surface, whereby the support structure is erected and installed.
Hanging the upper side of the protection net in the free end of the axial force absorber constituting each of the adjacent strut structure, it is installed taut,
A shock absorbing book, characterized in that the mounting height of the upper side of the protective net can be adjusted by displacing the installation position of the binding plate along the bullet span. 8. The method of claim 7,
The lower side of the protective net is attached to the base of the said modified derivative, The shock absorbing book characterized by the above-mentioned. 8. The method of claim 7,
The shock absorbing book, characterized in that the lower side of the protection net is fixed to the mountain-side slope.
KR1020120103968A 2012-09-19 2012-09-19 Support structure and guard fence KR20140037610A (en)

Priority Applications (1)

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KR1020120103968A KR20140037610A (en) 2012-09-19 2012-09-19 Support structure and guard fence

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107700374A (en) * 2017-10-10 2018-02-16 布鲁克（成都）工程有限公司 With the buffering energy dissipator for starting load peak clipping effect

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107700374A (en) * 2017-10-10 2018-02-16 布鲁克（成都）工程有限公司 With the buffering energy dissipator for starting load peak clipping effect
CN107700374B (en) * 2017-10-10 2024-03-19 布鲁克(苏州)工程有限公司 Buffering energy dissipation device with starting load peak clipping function

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