Protective fence

Abstract

To propose a support structure for protective fences that allows for strength adjustment through a simple structure. [Solution] The structure comprises multiple outer columns 20 arranged vertically at intervals, multiple restraint plates 30 arranged in multiple stages across the multiple outer columns 20 and connecting the multiple outer columns 20 in a load-transmitting manner, and multiple bracing members 40 arranged vertically and connecting adjacent restraint plates 30 vertically in a load-transmitting manner. Multiple load-bearing sections of the rigid frame structure are formed along the height direction according to the installation intervals of the restraint plates 30, and the outer columns 20, restraint plates 30 and bracing members 40, which are stress members, are configured to be assembleable.

Description

Technical Field

[0001] The present invention relates to a protective fence technology for capturing falling objects such as falling rocks, collapsing earth and sand, and avalanches with a blocking surface such as a protective net, and particularly to a protective fence whose strength can be easily adjusted according to the on-site situation. fence It relates to.

Background Art

[0002] A protective fence having a plurality of columns erected at intervals and a protective net stretched between adjacent columns is well-known, and various protective fences have been proposed according to the impact performance. In this type of protective fence, since the impact force (kinetic energy) when capturing a falling object with the protective net is finally supported by the columns, the strength of the columns is set according to the assumed impact force of the falling object.

[0003] As a general column, a steel pipe with a hollow structure alone or a column structure body in which various reinforcement structures are combined with the steel pipe is used. As a reinforcing means for increasing the strength of a steel pipe column, for example, a column structure body filled with mortar or the like in the steel pipe (Patent Document 1), a column structure body in which a reinforcing H-shaped steel is inserted into a steel pipe with a hollow structure (Patent Document 2), or a column structure body in which a plurality of bar steel materials are arranged and reinforced in a mortar-filled steel pipe (Patent Document 3) is known, and the column structure bodies are properly used according to the energy absorption performance.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] Conventional support structures have the following inherent problems that need to be addressed. <1> Although the conventional support structures disclosed in Patent Documents 1 to 3 have high rigidity, they require many steps to manufacture and are therefore expensive to produce. <2> Conventional support structures are heavy because they house reinforcing materials such as H-beams or steel bars inside the steel pipe, or fill the entire length of the steel pipe with mortar. Therefore, the support structure cannot be handled by manpower alone, and heavy machinery is required for transporting the support structure to the site and erecting it on site. <3> Despite the fact that the impact force of landslides varies depending on the location, the strength of all support structures in the protective fence is manufactured to match the maximum expected impact force of the landslide. Therefore, the design of the support structure is uneconomical. <4> Adjusting the strength of conventional support structures requires changing the cross-sectional dimensions of steel pipes and reinforcing materials, or changing the thickness of the steel pipes, which cumbers with the management and selection of various types of steel materials with different dimensions and thicknesses. Therefore, it is not possible to easily adjust the design strength of the support structure according to the installation location at the site.

[0006] This invention has been made in view of the above points, and its purpose is to provide a protective structure with adjustable strength. fence The goal is to propose this. [Means for solving the problem]

[0007] This invention relates to a support structure erected at intervals and a structure formed between adjacent support structures. , rockfalls, landslides, avalanches, etc.A protective fence comprising at least a blocking surface for capturing landslides, wherein the support structure comprises a plurality of outer columns arranged vertically at intervals, a plurality of restraint plates arranged in multiple stages across the plurality of outer columns and connecting the plurality of outer columns in a load-transmitting manner, and a plurality of bracing members arranged vertically and connecting the vertically adjacent restraint plates in a load-transmitting manner, and a plurality of load-bearing sections of a rigid frame structure are formed along the height direction in accordance with the installation interval of the restraint plates, The aforementioned outer column is a stress member having a length that extends across multiple load-bearing sections. The stress members are the outer column, restraint plate, and brace material. Select the number of units to install and change the strength of the support structure. Configure to make possible The blocking surface includes at least one of a steel or fiber rope material or a steel or fiber net material, and the intersection of the outer column of the support structure and the blocking surface is mounted in a load-transmitting manner. That is what it was. In another embodiment of the present invention, three or more column holes that can penetrate the outer column and a plurality of fitting slits that can fit the upper and lower ends of the brace material are formed on the surface of the restraint plate, and the number of assembled stress members of the outer column or brace material can be selected according to the design strength. In another embodiment of the present invention, in all load-bearing sections formed along the height direction, the number of stress members, which are the outer columns or braces, may be configured in the same number of combinations, or in multiple load-bearing sections formed along the height direction, the number of stress members, which are the outer columns or braces, may be configured in different combinations. In another embodiment of the present invention, the invention may be further configured to include positioning means for the restraint plate, which positions the restraint plate immovably with respect to the outer column. In another embodiment of the present invention, the brace material may be configured to include a pair of bent frames and connecting pins that connect the bent portions of the bent frames. [Effects of the Invention]

[0008] The present invention provides at least one of the following effects. <1> By simply selecting the appropriate number of stress members in the outer columns or braces that make up the support structure, it is possible to individually manufacture support structures that match the strength (bending strength, axial strength, shear strength) required on site. <2> By selecting the number of stress members, such as external columns or bracing members, the overall strength of the support structure can be altered, and it is also possible to partially reinforce load-bearing sections at specific heights. Therefore, it is possible to easily change the strength of the support structure. <3> When assembling the support structure, the overall length of the support structure can be individually adjusted to suit the site by appropriately selecting the number of stress members to be installed. <4> Because the entire support structure exhibits a rigid frame structure, it is lightweight yet possesses high load-bearing capacity. In particular, even if the overall length of the outer column is long, multiple restraining plates restrain and reinforce the column at its intermediate points, allowing it to exhibit high resistance to buckling. <5> One way to increase the strength of a support structure is to use outer columns of different diameters and material thicknesses. Increasing the diameter of the outer columns not only makes them heavier and harder to handle, but also requires changing the diameter of the column holes in the restraint plates. Furthermore, as the number of types of stress members constituting the support structure increases, managing and differentiating between stress members becomes complicated. In this invention, since stress members of the same standard are used in the fabrication of the support structure, the troublesome management and differentiation of stress members are unnecessary. <6> Because all the stress members that make up the support structure are lightweight, the materials can be divided into smaller portions and transported to the site using only the manpower of workers, without the need for large transport vehicles, and the support structure can also be assembled using only the manpower of workers. <7> Because the support structure is modular, if the stress members (outer columns, restraint plates, or bracing members) of the support structure deform, the support structure can be easily repaired by replacing only the minimum necessary stress members. [Brief explanation of the drawing]

[0009] [Figure 1] Perspective view of a protective fence equipped with a support structure and a blocking surface. [Figure 2] Cross-section of a protective fence [Figure 3] Plan view of the protective fence [Figure 4]Cross-sectional view taken along line IV-IV in FIG. 1 [Figure 5] Explanatory drawing of the method for assembling the column structure [Figure 6] Explanatory drawing of the method for assembling the column structure in which braces are assembled between upper and lower restraint plates [Figure 7] Explanatory drawing of another embodiment in which the column structure is reinforced [Figure 8] Cross-sectional view taken along line VIII-VIII in FIG. 1 [Figure 9] Explanatory drawing of a modified example of the column structure in which the planar shape of the restraint plate is formed into a disk shape [Figure 10] Horizontal cross-sectional view of the column structure shown in FIG. 9

Mode for Carrying Out the Invention

[0010] The present invention will be described in detail hereinafter with reference to the drawings.

[0011] 1. Outline of the protective fence This will be described with reference to FIGS. 1 to 3. The protective fence exemplified in the present invention includes at least an assembled column structure 10 erected at a predetermined interval and a blocking surface 50 attached between adjacent column structures 10. The protective fence of this example will be described in detail hereinafter.

[0012] 2. Column structure This will be described with reference to FIGS. 1 to 3. The column structure 10 is an assembled column including a plurality of outer columns 20 arranged vertically at intervals, a plurality of restraint plates 30 arranged in multiple stages across the plurality of outer columns 20 and connecting the spaces between the plurality of outer columns 20 so as to be capable of transmitting loads, and a plurality of braces 40 arranged vertically and connecting the spaces between vertically adjacent restraint plates 30, 30 so as to be capable of transmitting loads.

[0013] For easy understanding of the invention, the column structure 10 is divided into a plurality of sections for convenience according to the installation interval of the restraint plates 30, and one section in which the column structure 10 is divided at equal intervals in the height direction is defined as a load-bearing section 11 and described. Each load-bearing section 11 exhibits a rigid frame structure.

[0014] The support structure 10 has a polygonal planar shape. The width and height of the support structure 10, as viewed from the side, can be selected as appropriate. In practical terms, the width of the support structure 10 when viewed from the side is, for example, 30 to 60 cm, and its height is 2 to 6 m.

[0015] The present invention constructs the support structure 10 in an assembly-type manner using multiple stress members (outer column 20, restraint plate 30, brace member 40) in order to improve the handling of these stress members and to allow the strength of the support structure 10 to be individually adjusted (changed) by appropriately selecting the number of these stress members to be installed. The constituent members of the support structure 10 will be described in detail below.

[0016] <1> outer pillar The outer column 20 is a rod-shaped or tubular strength member that resists bending and axial forces acting on the support structure 10, and is used in a vertical orientation. The outer column 20 may be a single, solid structural member, or it may be an assembly type divided into multiple sections along its length. For practical purposes, known single-pipe scaffolding can be used for the outer columns 20.

[0017] <1.1> Total length of the outer column The total length of the outer column 20 is selected appropriately to match the total length of the support structure 10. In this example, we will describe a configuration in which all outer columns 20 have the same total length.

[0018] <1.2> Spacing of exterior columns Multiple outer columns 20 are arranged at equal intervals and are in a parallel relationship with one another.

[0019] <1.3> Number of combinations of outer columns The support structure 10 comprises multiple outer columns 20. The outer columns 20 are one of the strength adjustment members of the support structure 10, and the number of outer columns 20 installed can be appropriately selected according to the design strength of the support structure 10.

[0020] In this example, we will describe a configuration in which four outer columns 20 are used as one unit, but the outer columns 20 can also be a combination of five or six; the point is that three or more outer columns 20 can be used as one unit.

[0021] <2> restraint board Please refer to Figures 2, 4, and 5 for further explanation. The restraint plate 30 is one of the strength adjustment members of the support structure 10, and the number of restraint plates 30 to be installed is appropriately selected according to the design height of the support structure 10.

[0022] The restraining plate 30 is a stress member that has both the function of restraining the multiple outer columns 20 so that they do not deform in the radial expansion direction and buckle, and the function of transmitting load between the multiple outer columns 20.

[0023] Multiple column holes 31 and multiple fitting slits 32 are provided at predetermined intervals around the periphery of the restraint plate 30.

[0024] <2.1> Post Hole The column holes 31 are holes for inserting the outer column 20 and are formed at equal intervals on the plate surface of the peripheral edge of the restraint plate 30. The number of column holes 31 can be appropriately selected according to the number of outer columns 20 installed.

[0025] <2.2> Fitting Slit The fitting slit 32 is an opening for fitting the hook portion 42 formed at the upper and lower ends of the brace material 40. By fitting the hook portion 42 at the end of the brace material 40 into the fitting slit 32, the restraint plate 30 and the brace material 40 can be connected and fixed together.

[0026] <2.2.1> Formation position of the fitting slit A fitting slit 32 is provided on the plate surface between adjacent pairs of column holes 31, 31 at the periphery of the restraint plate 30. The fitting slit 32 should be formed to match the fitting position of the hook portion 42 at the end of the brace material 40.

[0027] <2.2.2> Opening dimensions of the fitting slit The opening dimensions of the fitting slit 32 are formed to accommodate the hook portion 42 of the brace material 40. In this example, the fitting slit 32 has a rectangular shape, corresponding to the cross-sectional shape of the plate-shaped brace material 40. The fitting slit 32 may be formed to be narrow so as to accommodate only a single hook portion 42 of the brace material 40, or it may be formed to be wide so as to accommodate multiple hook portions 42 together.

[0028] <2.3> Planar shape of the restraint plate As shown in Figure 4, this example describes a configuration in which the restraint plate 30 is made of a single flat plate. The planar shape of the restraint plate 30 can be a square, polygon, circle, etc., and there are no particular restrictions on the planar shape of the restraint plate 30.

[0029] Furthermore, the restraint plate 30 is not limited to a flat plate, but may be a combination of strip-shaped link members that can individually connect the pairs of outer columns 20. When the restraint plate 30 is composed of multiple link members, column holes 31 are formed at both ends of the link members, and fitting slits 32 are formed near both ends of the link members.

[0030] <2.4> Positioning means for restraint plate This will be explained with reference to Figure 6. Each restraint plate 30 is positioned by the positioning means 21 in a way that prevents it from moving along the height direction of the outer column 20.

[0031] For the positioning means 21 of the restraint plate 30, for example, a single-pipe clamp, a spring clip material with a C-shaped cross-section, or a pin fastening structure can be applied. If the positioning means 21 is a single-pipe clamp or a spring clip, the restraining plate 30 is positioned by attaching it to the outer surface of the outer column 20 at the upper and lower positions of the restraining plate 30. If the positioning means 21 is a pin fastening structure, a pin member is combined with a plurality of pin holes opened along the axial direction of the outer column 20, and the restraint plate 30 is positioned by inserting the pin member into the pin hole aligned with the positioning position.

[0032] As another positioning means 21 for the restraint plate 30, the difference in diameter between the column hole 31 and the outer column 20 may be reduced, the outer column 20 may be fitted into the column hole 31 so that it is in pressure contact with the column hole 31, and the positioning may be achieved by utilizing the frictional resistance of the contact portion.

[0033] <3> Brace material Please refer to Figures 2, 4, and 5 for further explanation. The bracing members 40 are one of the strength adjustment members of the support structure 10, and the number of bracing members 40 installed can be appropriately selected according to the design strength of the support structure 10. The bracing member 40 functions as a stress member that connects the vertically adjacent restraining plates 30, 30.

[0034] To describe the brace material 40 illustrated in this example, the brace material 40 comprises a pair of bent frames 41, 41 and a connecting pin 45 that connects the bent portions of the bent frames 41, 41. The bracing material 40 was designed in an assembly-type configuration to facilitate the assembly of the bracing material 40 between the vertically adjacent restraint plates 30, 30.

[0035] <3.1> Flexible frame Please refer to Figure 5 for further explanation. The pair of bent frames 41, 41 are identical in structure and shape. The bent frame 41 consists of a plate that is shaped like the Japanese character "く" (ku). The bending angle of the bending frame 41 is selected appropriately to match the spacing between the restraint plates 30, 30 that are positioned above and below. The bent frame 41 has hook portions 42 that protrude inward at both ends. The hook portions 42 can be fitted into the fitting slits 32 of the restraint plate 30. The central bent portion of the bent frame 41 has a pin hole 43.

[0036] <3.2> Connecting pin The connecting pin 45 is a pin used to integrate a pair of bent frames 41, 41. By inserting connecting pins 45 through the pin holes 43 in the bent portions of the pair of overlapping bent frames 41, 41, the brace material 40 can be assembled into an X shape.

[0037] <3.3> Dimensions of the bracelet material The height of the 40mm bracelet material can be selected as needed. The bracing members 40 may be assembled to a single support structure 10, all of which are the same size, or bracing members 40 of different heights (total length) may be assembled. By changing the height (total length) of the bracing material 40, the spacing between each load-bearing section 11 formed in the support structure 10 can be adjusted.

[0038] <4> Ancillary equipment As ancillary equipment for the support structure 10, for example, spacing members (not shown) may be installed between the tops of adjacent support structures 10, or bracing ropes (not shown) may be installed between the mountain-side anchors installed on the slope side and the tops of each support structure 10. Furthermore, ancillary facilities equipped with known protective fences may be added and installed. These ancillary facilities are examples only and are not mandatory.

[0039] 3. Blocking surface Referring to Figures 1-3, the blocking surface 50 is a known flexible surface for capturing landslide materials. The blocking surface 50 is positioned on the uphill or downhill side of the support structure 10 and is installed spanning between multiple adjacent support structures 10.

[0040] <1> Examples of blocking surfaces In this example, a configuration is described in which the blocking surface 50 is made up of multiple steel or fiber rope materials 51 arranged in multiple stages, and steel or fiber net materials 52 arranged on one side of the multiple rope materials 51. However, the blocking surface 50 may be made up of either the rope material 51 or the net material 52. The specific configuration of the blocking surface 50 will be selected as appropriate depending on the type and amount of collapsed material to be captured.

[0041] <2> When the blocking surface is equipped with rope material If the blocking surface 50 is equipped with a rope material 51, a known buffer fitting may be provided on a part of the rope material 51, or it may be attached in a form without a buffer fitting. Furthermore, the intersection of the rope material 51 and the support structure 10 may be attached so as not to slide using bolts or the like, or it may be attached in a way that allows it to slide.

[0042] [Method for assembling the support structure] The assembly method for the support structure 10 will be explained below.

[0043] <1> Material delivery The outer columns 20, restraint plates 30, and bracing members 40 that constitute the support structure 10 are transported to the site. Since all the stress members constituting the support structure 10 are lightweight, the materials can be divided into smaller portions and transported to the site using only the manpower of workers, without the need for large transport vehicles.

[0044] <2> On-site assembly of support structures The support structure 10 is assembled on-site according to the following procedure. The support structure 10 may be assembled in either a horizontal or vertical orientation.

[0045] <2.1> Assembly process of restraint plate Please refer to Figure 5 for further explanation. Multiple outer columns 20 are assembled by inserting one end of each outer column 20 into the column holes 31 of the opposing restraint plates 30, and then bridging the multiple outer columns 20 between the multiple restraint plates 30.

[0046] <2.2> Assembly process of bracing materials Please refer to Figures 5 and 6 for further explanation. With the structure anchored to multiple outer columns 20, a brace material 40 is assembled between vertically adjacent restraint plates 30, 30. When assembling in units of 41 bent frames, the hook portion 42 at the end of each bent frame 41 is fitted into the fitting slit 32 of the restraining plate 30, and then the connecting pin 45 is inserted through the bent portion of the pair of bent frames 41, 41, thereby allowing the locking operation to the restraining plate 30 and the assembly operation of the brace material 40 to be performed simultaneously. Alternatively, the completed brace material 40, which has been pre-assembled into an X shape, may be fitted between the upper and lower restraint plates 30, 30.

[0047] When setting the brace material 40, the positioning means 21 is used to position the restraint plate 30 so that it cannot be displaced at a predetermined position on the outer column 20.

[0048] <2.3> Repeating the process The assembly of the support structure 10 is completed by repeatedly performing the assembly process of the restraint plates 30 to the outer columns 20 and the assembly process of the bracing members 40 between adjacent restraint plates 30, 30 until the predetermined design height is reached.

[0049] When assembling the support structure 10, the height of the support structure 10 can be adjusted to a design height appropriate to the installation location by selecting the number of restraint plates 30 and bracing members 40 to be installed.

[0050] Since welding and heavy machinery are not used in the assembly of the support structure 10, the support structure 10 can be manufactured in a short amount of time. For example, when manufacturing a column structure 10 with a height of 2m, one worker can assemble it in a short working time of about 15 to 20 minutes.

[0051] <3> Strength adjustment of support structure The support structure 10 according to the present invention allows for easy strength adjustment on site. The method for adjusting the strength of the support structure 10 will be explained below.

[0052] <3.1> Strength adjustment by external columns The strength of the support structure 10 can be adjusted by selecting the number of outer columns 20 that make up the support structure 10. The strength of the support structure 10 increases in proportion to the number of outer columns 20 installed.

[0053] Another way to strengthen the support structure 10 is to increase the diameter of the outer columns 20. However, increasing the diameter of the outer columns 20 would not only make them heavier and harder to handle, but it would also require changing the column holes 31 in the restraint plates 30. Therefore, managing and differentiating between large-diameter stress members (external columns, restraint plates) and non-large-diameter stress members (external columns, restraint plates) becomes complicated. In order to solve these problems, the present invention makes it possible to adjust the strength of the support structure 10 by selecting the number of outer columns 20 to be installed.

[0054] <3.2> Strength adjustment using bracing material The strength of the support structure 10 can also be adjusted by selecting the number of bracing members 40 that make up the support structure 10. For example, the bracelet material 40 may be assembled individually, or multiple sets of bracelet material 40 may be assembled in a superimposed state. The strength of the support structure 10 increases in proportion to the number of bracing members 40 installed.

[0055] Furthermore, the support structure 10 may have the same strength throughout its entire length by using the same number of bracing members 40 in all load-bearing sections 11, or it is possible to partially reinforce load-bearing sections 11 at any height by selecting the number of bracing members 40 to be installed.

[0056] As described above, in the present invention, when assembling the support structure 10, the total length and strength (bending strength, axial strength, shear strength) of the support structure 10 can be individually adjusted to suit the site by simply selecting the appropriate number of stress members to be installed in the support structure 10.

[0057] <4> Erection of support structure The support structure 10, manufactured in the process described above, is erected at the site where the protective fence will be installed, at predetermined intervals. An example of erecting the support structure 10 is described below.

[0058] <4.1> Support method for column structures using steel foundations Refer to Figure 2 for explanation. Alternatively, a steel foundation 60 for a tower structure may be constructed at the installation location of the support structure 10, and the support structure 10 may be erected directly on top of the steel foundation 60. The steel foundation 60 consists of multiple support piles 61 driven into the ground and multiple supports stretched between the tops of the support piles 61. For the support piles 61 and girder members 62, commercially available single pipes, structural steel, column members, etc., can be used.

[0059] <4.2> Direct erection method of support structure Although not shown in the diagram, the lower part of the support structure 10 may be erected by directly embedding it into a concrete foundation or the natural ground.

[0060] <5> Installation of spacing materials If necessary, a steel spacing member is horizontally placed between the tops of adjacent support structures 10. For spacing materials, single-pipe scaffolding or steel pipes can be used. The space between both ends of the spacing member and the top of the support structure 10 is fixed using known bolt connection means.

[0061] <6> Installation of safety ropes on the mountain side If necessary, a mountain-side anchor is constructed on the uphill side of the support structure 10, and a mountain-side bracing rope is installed between the top of the support structure 10 and the mountain-side anchor.

[0062] [Load-bearing function of support structures] Next, referring to Figures 2 and 3, the load-bearing function of the support structure 10 when subjected to impact on the protective fence will be explained.

[0063] <1> Bending strength of support structure When a bending force acts on the support structure 10 through the blocking surface 50, the outer column 20, restraining plate 30, and brace member 40 that constitute the support structure 10 work together to resist the bending force. In particular, each load-bearing section 11 of the support structure 10 exhibits a rigid frame structure, thus resisting rotation and bending. In particular, even if the total length of the outer column 20 is long, multiple restraint plates 30 restrain and reinforce the outer column 20 at its intermediate points, making it less likely for the outer column 20 to buckle. Furthermore, the multiple bracing members 40 provided on the outer periphery of the support structure 10 work in cooperation with the outer column 20 to resist bending and tensile forces, thereby reducing the load on the outer column 20. When the external force exceeds the design strength of the support structure 10, plastic deformation occurs in the outer column 20 and the brace member 40, and the bending force is absorbed during the deformation of the outer column 20 and the brace member 40.

[0064] <2> Repair work on support structure The support structure 10 is of the assembly type. Therefore, when repairing the protective fence after an impact, the support structure 10 can be easily repaired by replacing only the deformed components of the support structure 10 (external columns 20, restraining plates 30, or bracing materials 40) with new materials.

[0065] [Other examples] Other embodiments will be described below, but in that description, the same parts as in the above embodiments will be denoted by the same reference numerals, and their detailed descriptions will be omitted.

[0066] <1> Other reinforcing structures for support structures In the above embodiment, a configuration was described in which the number of outer columns 20 and bracing members 40, which are stress members constituting the support structure 10, were arranged to be the same in all load-bearing sections 11. However, it is also possible to partially reinforce a specific load-bearing section 11 by increasing the number of stress members installed in that section.

[0067] <2> Examples of partial reinforcement To explain the reinforcement structure illustrated in Figures 7 and 8, it shows a form in which the number of outer columns 20 and bracing members 40 installed in the lower half of the support structure 10 has been increased for reinforcement.

[0068] The stress members may be configured by increasing the number of either the outer columns 20 or the bracing members 40. The number of outer columns 20 may be changed in stages along the height direction (stacking direction) of the support structure 10.

[0069] By gradually increasing the number of stress members installed from the top to the bottom of the support structure 10, the strength of the support structure 10 can be gradually increased from the top to the bottom. In short, the number of stress members is increased and arranged compared to other sections so that sections where bending forces acting on the support structure 10 are large can be partially reinforced.

[0070] <3> The effect of this example In this example, in addition to the effects described in the previous embodiment, the strength of the support structure 10 can be arbitrarily adjusted (changed) along the height direction (stacking direction) simply by selecting the number of similar stress members to be installed.

[0071] [Differentiation] A modified version of the above embodiment will be described with reference to Figures 9 and 10.

[0072] <1> Modified form of support structure This example describes a modified form of the support structure 10 in which the planar shape of the restraint plate 30 is formed into a disc shape. The formation of multiple columnar holes 31 and multiple fitting slits 32 along the circumferential direction of the restraint plate 30 is the same as in the previously described embodiment.

[0073] In this example, multiple reinforcing column holes 31a, 31a may be formed along the centripetal direction at the 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions on the circumferential surface of the restraint plate 30, as represented by a clock face. Alternatively, the restraint plate 30 may be configured to form multiple concentric ring-shaped rows of column holes 31. <2> The effect of this example In this example, in addition to the effects of the previous embodiments, the bending strength of the support structure 10 can be increased by adding outer columns 20 to the reinforcing column holes 31a, 31a. Therefore, when subjected to impact, the support structure 10 can effectively resist external forces acting in the direction of the slope inclination or in a direction perpendicular to the direction of the slope inclination. [Explanation of symbols]

[0074] 10... Support structure 20...Outer pillar 21. Positioning means 30...Restriction plate 31... Column hole 32.. Fitting slit 40...Bracelet material 41...Flexible frame 42...Hook part 43...pinholes 50...blocking surface 51... Rope material 52..Net material 60... Steel foundation 61...Support pile 62... Girder material

Claims

1. A protective fence comprising at least a support structure erected at intervals and a blocking surface formed between adjacent support structures to capture falling debris, The aforementioned support structure consists of multiple outer columns arranged vertically at intervals, Multiple restraint plates are arranged in multiple stages across the aforementioned multiple outer columns, and connect the multiple outer columns in a manner that enables load transmission. It comprises multiple bracing members arranged vertically and connecting adjacent restraint plates vertically in a manner that allows for load transfer, Multiple load-bearing sections of a rigid frame structure are formed along the height direction in accordance with the installation interval of the aforementioned restraint plates. The external column, restraint plate, and brace material, which are stress members, are configured to be assembleable. Protective fence post structure.

2. The protective fence support structure according to claim 1, characterized in that three or more column holes that can penetrate the outer column are formed on the surface of the restraint plate, and a plurality of fitting slits that can fit the upper and lower ends of the brace material are formed on the surface of the restraint plate, and the number of assembled stress members of the outer column or brace material can be selected according to the design strength.

3. The protective fence support structure according to claim 2, characterized in that in all load-bearing sections formed along the height direction, the number of stress members, which are the outer columns or bracing members, are configured in the same number of combinations.

4. The protective fence support structure according to claim 2, characterized in that in a plurality of load-bearing sections formed along the height direction, the number of stress members, which are the outer columns or bracing members, is configured in different combinations.

5. The protective fence support structure according to claim 1, characterized in that the outer column is a single pipe.

6. The protective fence support structure according to claim 1, further comprising a positioning means for a restraint plate that immovably positions the restraint plate relative to the outer column.

7. The protective fence support structure according to claim 1, characterized in that the brace material comprises a pair of bent frames and connecting pins that connect the bent portions of the bent frames.

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