JP4599459B1 - Protective body and modification method of existing protective body - Google Patents

Abstract

An object of the present invention is to provide a protective body capable of reducing a force applied to a foundation from a support column when receiving an impact force.
In a protective fence in which supports 3, 3... Are erected at intervals and a net 4 serving as a protective surface is provided between the supports 3, 3. The base 2 is provided with an H-shaped steel 5 as a core material with the lower part embedded and fixed, and a pipe 6 attached to the upper part of the H-shaped steel 5, and the pipe 6 is fixed to the H-shaped steel 5 to provide a protective fence as a protective body. It is configured such that a plastic hinge is formed at the lower part of the tube material 6 by the applied impact force. When an impact force is applied to the protective fence and a force greater than a predetermined force for tilting the support column 3 is applied, the lower portion of the pipe material 6 is plastically deformed, and a large bending moment is not generated in the lower portion of the pipe material 6. Thus, since the bending moment which generate | occur | produces in the pipe material 6 can be reduced, the force added to the concrete foundation 2 from the pipe material 6 also becomes small.
[Selection] Figure 1

Description

The present invention relates to a protective body and a method for modifying an existing protective body.

  Conventionally, as this type of protective body, a shock-absorbing fence in which a wire rope material or net is stretched between struts erected at a predetermined interval on the foundation concrete, and a reserve rope material is connected between the upper portion of the strut and the anchor In the above, a shock absorber is provided in the middle of the upper portion of the strut or in the middle of the strut rope material, or between the strut rope material and the anchor, and the impact is obtained by pivotally supporting the lower portion of the strut via a hinge. There is an absorption fence (for example, Patent Document 1).

  The shock absorbing fence can reduce the bending moment generated in the lower part of the column by tilting the column, but it is not suitable for use in a site where a large impact force is applied.

  On the other hand, as a protective fence with a structure that fixes the lower part of the support to the foundation, the foundation concrete provided at the boundary between the slope and the road, the supports installed on the foundation concrete at a predetermined interval, and the space between these supports Protective fence (for example, Patent Document 2) composed of a protective net stretched around in a belt shape, and support pillars are provided at predetermined intervals, a horizontal rope material is provided between the support pillars, and a buffer is provided in the middle of the horizontal rope material. A portion of which is shielded by a wire net that is hooked on a horizontal rope member between the columns, and the buffer portion is formed by superposing the rope member in the middle of the horizontal rope member, and this This concrete foundation is equipped with a holding fence that holds the surplus part with a constant force, a protective fence (for example, Patent Document 3) in which the lower part of the H-shaped steel is built in the ground, and a pillar is provided, and a concrete foundation is provided on the slope. The bottom of the column is buried in The protective fence (for example, provided with a shock absorber for allowing the sliding of the stay rope material to be allowed to slide in the middle of the stay rope material is connected to the upper portion of the support post and the slope on the front side of the support post by a stay rope material. There is a protective fence (for example, Patent Document 5) in which a lower part of a pillar made of H-shaped steel is embedded and fixed to a concrete foundation, cables are stretched in multiple stages between the pillars, and a wire mesh is stretched.

JP 11-315512 A JP 2003-3425 A JP-A-6-173221 Japanese Unexamined Patent Publication No. 2000-273727 (FIG. 4) JP-A-9-184115 JP-A-2005-351047

  The protective fences of the above prior arts 2 to 5 have a structure in which the lower part of the support is buried and fixed to the foundation, and the support is rigidly connected to the foundation. Therefore, the resistance of the support to the bending moment generated by the impact force such as falling rocks. Therefore, a large and high-strength support column is required to counteract, and a large foundation is required to support the support column.

  And in the said patent documents 2 and 3, when a rope material frictionally slides to a buffer, the impact force added to a protective fence is absorbed, and this can reduce the force added to a support | pillar, and it is a burden to a foundation. In order to reduce this, a buffer structure having an excellent impact force absorbing effect is required.

  By the way, when the impact force absorbing effect is improved or the height of the fence is increased at the existing guard fence installation location, replacing the existing guard fence to construct a new guard fence will increase the construction cost. Therefore, it is conceivable to perform reinforcement work (for example, Patent Document 6). However, as in Patent Document 5 described above, in the protective fence in which the lower part of the support is embedded and fixed, the existing concrete foundation is used almost as it is. When it is done, it is easy to be restricted.

  Therefore, the present invention aims to provide a protective body capable of reducing the force applied to the foundation from the support when subjected to an impact force, and a method of reinforcing the protective body that can be easily reinforced. The purpose is to provide.

  (1) In the present invention, the pillars are erected on the concrete foundation with an interval between the left and right sides, a protective surface is provided between the pillars, and the pillar is an H-shaped steel in which the lower part is embedded and fixed to the concrete foundation; And a tubular body covering the upper portion of the H-shaped steel, wherein the tubular material is fixed to the H-shaped steel, and a collar is provided at the lower end of the tubular material, and a steel collar anchor is provided on the collar. The lower part of the anchor for the buttock is inserted and fixed in the concrete foundation, and the H-shaped steel has a flange part arranged at the front and rear, and a web part connecting the flange parts, and the lower part of the pipe member The pipe material is fixed to the H-shaped steel with a filler filled in the pipe material without being embedded and fixed in the concrete foundation.

  According to the above configuration, when an impact force is applied to the protective body and a force exceeding a predetermined value for tilting the support column is applied, the lower portion of the tube material is plastically deformed, and a large bending moment is not generated at the lower portion of the tube material. Since the bending moment generated in the pipe material can be reduced in this way, the force applied from the pipe material to the installation place is also reduced.

  According to the said structure, while being able to fix a core material and a pipe material with a filler, the intensity | strength of a support | pillar improves with a filler.

  According to the above configuration, even if an impact force is applied to the protective body, the force applied to the concrete foundation can be reduced, so that the load on the concrete foundation can be reduced.

  (2) Further, the present invention is characterized in that lower portions of a plurality of support anchors are embedded and fixed in the concrete foundation, and the upper portions of the support anchors are embedded and fixed in the filler.

  According to the said structure, a foundation and a pipe material can be integrated via a filler by the anchor for support | pillars.

  (3) Moreover, this invention is characterized by the said pipe material being a steel pipe.

  According to the said structure, the support | pillar structure which consists of a steel pipe equipped with H-shaped steel as a core material is obtained.

(4) Moreover, this invention is provided with the existing concrete foundation and the some existing support | pillar with which the lower part was embed | buried under this existing concrete foundation, and the said existing support | pillar is H-section steel which embeds and fixed the lower part to the said existing concrete foundation. In the method of remodeling an existing protective body having flange portions arranged at the front and rear and a web portion connecting these flange portions, the H-shaped steel is provided with a flange portion at the lower end of a pipe and attached to the existing concrete foundation By drilling a hole and fixing the lower part of the steel anchor to the mounting hole, the lower part of the anchor is buried and fixed in the existing concrete foundation, and the upper part of the H-shaped steel is The tube material is sheathed, and the upper portion of the anchor for the buttock portion is inserted into the insertion hole of the ridge portion, and the lower portion of the tube material is embedded and fixed in the existing concrete foundation without being filled. Filled by fixing the tube material to the H-shaped steel by the filling material, and providing a protective surface across a plurality of said tubing.

  According to the above configuration, it is possible to construct a protective fence that can reinforce the existing protective fence and cope with a high impact force, and the load applied to the concrete foundation does not increase. In case of reinforcing the foundation, a simple one is sufficient.

  According to the above configuration, when an impact force is applied to the protective body and a force greater than a predetermined value is applied to collapse the support column, the lower part of the pipe material is plastically deformed, and a large bending moment is not generated at the lower part of the pipe material. Moreover, since the bending moment which generate | occur | produces in a pipe material can be reduced, the force added to a foundation from a pipe material also becomes small.

  Moreover, according to the said structure, when reinforcing an existing protective body, construction is easy and the load to a concrete foundation can be reduced.

It is a side view which shows the protection fence of Example 1 of this invention. It is a front view of an intermediate | middle support | pillar same as the above. It is a front view of the support | pillar of an edge part same as the above. It is a side view of an intermediate | middle support | pillar same as the above. It is a side view of the support | pillar of an edge part same as the above. It is a top view of an intermediate | middle support | pillar same as the above. It is a top view of the support | pillar of an edge part same as the above. It is sectional drawing of a support | pillar same as the above. It is a rear view which shows the protection fence of Example 2 of this invention. It is a rear view of the principal part same as the above. It is a top view same as the above. It is a side view same as the above. It is a front view of the principal part of a wire net same as the above. It is a top view of a shock absorber same as the above. It is a rear view of a buffer structure same as the above. It is a front view of a shackle same as the above. It is a rear view of the support | pillar upper part of an edge part same as the above. It is a rear view of the lower part support | pillar same as the above. It is a side view of a support | pillar upper part same as the above. It is a side view of a support | pillar lower part same as the above. It is a side view explaining the state which folds up and down the edge part of a rope material for buffering in the reverse direction same as the above. It is a rear view of an intermediate | middle support | pillar upper part same as the above. It is a rear view of an intermediate | middle support | pillar lower part same as the above. It is a top view of the support | pillar of an edge part same as the above. It is a top view of the principal part of a reserving rope material of a side part same as the above. It is a top view of an intermediate | middle support | pillar same as the above. It is a front view of a wire clip same as the above. It is a front view of the principal part of the wire net | network of the modification which shows Example 3 of this invention.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new protective body and its reinforcement method different from the conventional one, an unprecedented protective body and its reinforcement method are obtained, and the protection body and its reinforcement method will be described.

  Embodiment 1 of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a protective fence 1 that is a protective body such as falling rocks, avalanches, collapsed earth and sand, etc., is provided with a plurality of support columns 3 standing on a concrete foundation as an installation place at a predetermined interval and arranged in the left-right direction. In addition, a mesh body 4 serving as a protective surface having flexibility is provided between the columns 3.

  The concrete foundation 2 is formed to be longer in the left-right direction than the interval between the pillars 3 at both ends, the bottom surface portion 2S is formed wider in the front-rear direction than the upper surface portion 2U, and has a front surface portion 2M that is substantially vertical on the mountain side (front side). And it has the back surface part 2K inclined so that it may fall to the front side on the anti-mountain side (rear side).

  As shown in FIG. 1, in the concrete foundation 2, the lower part of the H-shaped steel 5 which is a core material is embedded and fixed, and as shown in FIGS. 6 and 7, the H-shaped steel 5 is The flange portions 5F and 5F are arranged at the front and rear, and the flange portions 5F and 5F are connected by a web portion 5U. Further, the pipe 6 made of a steel pipe is externally mounted on the H-shaped steel 5, and in this case, the support 3 is constituted by the H-shaped steel 5 and the pipe 6 without burying and fixing the lower part of the pipe 6 in the concrete foundation 2. ing. In addition, the height from the upper surface part 2U is 1 time or more, preferably 1.2 times or more of the tube material 6 of the H-section steel 5, and is 2 times or more in this example. The lower part of the H-shaped steel 5 projects downward from the lower end of the pipe member 6, and the lower part is embedded and fixed to the concrete foundation 2.

  The pipe 6 is filled with a non-shrink mortar which is a cement-based filler, and the H-shaped steel and the pipe 6 are fixed and integrated by the filler 7 as a fixing means. A steel flange 601 is provided at the lower end of the tube 6, and the upper surface of the flange 601 and the outer surface of the tube 6 are connected by a plurality of reinforcing ribs 602.

  A plurality of support anchors 8 are arranged in the pipe material 6, and the support anchors 8 are embedded and fixed in the concrete foundation 2 and the upper parts thereof are embedded and fixed in the filler 7. And as shown in FIG.6 and FIG.7, between the said flange parts 5F and 5F, the said some anchors 8 for support | pillars are arrange | positioned along with the front-back direction at the right and left of the web part 5U, In this example, Two support anchors 8 are arranged side by side in the front-rear direction.

  Further, a buttock anchor 9 is disposed outside the pipe 6 on the columns 3 and 3 at both ends except for the central column 3, and this buttock anchor 9 is inserted into the through-hole 603 of the ridge 601. In this example, as shown in FIG. 7, the two front and rear anchors for the buttock are arranged on the left and right of the pipe member 6. In this way, by arranging the buttock anchors 9 on the left and right within the diameter of the tube material 6, the buttock anchors 9 can be arranged on the center side in the front-rear direction of the upper surface portion 2U, and when receiving an impact force The influence of the force applied from the anchor 9 to the front and rear surface portions 2M and 2K of the concrete foundation 2 can be reduced.

  The strut anchor 8 is longer than the buttocks anchor 9, and the height and the embedding depth with respect to the upper surface portion 2U are larger than that of the buttocks anchor 9, and the strut anchor 8 The anchor 8 has a height higher than the embedding depth with respect to the upper surface portion 2U. The through hole 603 is a through hole.

  Both anchors 8 and 9 are made of steel, and have a screw portion that is a concave and convex portion on the surface in order to ensure adhesion with the filler. The mounting holes 8K and 9K are formed by the above, and the mounting holes are filled with an adhesive, and the lower portions of the anchors 8 and 9 are fixed to the mounting holes 8K and 9K by the adhesive, whereby the anchor 8 is attached to the concrete foundation 2. , 9 is buried and fixed. Note that the support anchor may be a modified anchor having an uneven portion on the upper surface.

  A flat pedestal portion 10 is provided between the upper surface portion 2U and the flange portion 601. The pedestal portion 10 is formed of mortar or the like on the site, and the pedestal portion 10 serves as a spacer and serves as a spacer of the pipe material 6. Fine adjustment of the height becomes possible. In addition, although the planar shape of the base part 10 showed the square thing in the figure, circular etc. may be sufficient and it is preferable to form larger than the collar part 601. FIG.

  Next, the construction method of the protective fence 1 will be described. At the site, a mold (not shown) is assembled, a reinforcing bar (not shown) is arranged inside, an H-shaped steel 5 as a core material is arranged, and concrete is filled in the mold to construct the concrete foundation 2. In addition, the concrete foundation 2 may be constructed so as to form a mounting hole in the buried portion of the H-shaped steel 5, and the lower portion of the H-shaped steel 5 may be buried and fixed in the mounting hole with a filler such as a non-shrink mortar. . The hip anchor 9 may be inserted into the through hole 603 and the attachment hole 9K and fixed to the attachment hole 9K after placing the pipe material 6 or fixing it to the H-shaped steel 5. .

  Next, if necessary, the pedestal 10 is formed of mortar or the like, and the upper surfaces of the pedestals 10 are aligned. Further, as described above, the anchors 8 and 9 are fixed at predetermined positions on the upper surface portion 2U. The flange 6 601 at the lower end of the tube 6 is placed on the upper surface of the pedestal 10 serving as an installation reference plane so that the tube 6 is covered with the H-shaped steel 5 from above. When the buttock anchor 9 is fixed first, the pipe material 6 is installed on the concrete foundation 2 so that the buttock anchor 9 is inserted into the through hole 603. Thereafter, a filler 7 as a fixing means is filled from the upper opening of the tube 6, and the filler 7 is hardened to fix the tube 6 to the H-shaped steel 5. And the said anchor 9 for ribs inserted in the said through-hole 603 restrict | limits the movement of the horizontal direction of the pipe material 6, and does not restrict | limit the upward movement. The nut 9N is screwed onto the upper portion of the anchor 9 for fixing the flange 9 to fix the flange 601 to the concrete foundation 2. In this case, when a force for tilting the support column 3 is applied and the force exceeds a predetermined value, the anchor 9 made of a steel material extends and plastically deforms, so that the pipe material 6 is not constrained to the concrete foundation 2.

  When the support column 3 is erected in this manner, the horizontal rope members 20 and 20 are stretched in multiple stages between the support columns 3, 3..., And the net 4 serving as a protective surface is stretched to construct the protective fence 1.

  Next, the operation of the above configuration will be described. When an impact force such as falling rocks, avalanches, collapsed earth and sand is applied to the protective fence 1 and a force to fall the support column 3 is applied. Since the lower part of 6 is plastically deformed, a large bending moment is not generated in the lower part of the tube material 6. In this case, the pipe material 6 is not embedded in the concrete foundation 2, and a column anchor 8 made of steel is disposed between the filler 7 and the pedestal portion 10 made of mortar, and the column anchor 8 is When the force to fall the support column 3 exceeds a predetermined value, the tube 6 extends and plastically deforms. Therefore, the lower end of the pipe member 6 is connected to the concrete foundation 2 by a plastic hinge that plastically deforms when a predetermined force is applied to the concrete foundation 2. . In addition, although the concrete material 2 and the filler 7 made of mortar or the like are adhered with a predetermined adhesion force, they are placed separately, so when a force exceeding a predetermined value is applied to the pipe material 6, it peels off from the boundary surface. To do.

  In this way, since the lower portion of the pipe material 6 is plastic hinge-coupled, the bending moment generated in the pipe material 6 can be reduced, so that the force applied to the concrete foundation 2 from the pipe material 6 is reduced, and without using a large foundation, 3 can be configured.

  As described above, in this embodiment, the pillars 3, 3,... Are erected on the concrete foundation 2 with a space left and right, and a net 4 serving as a protective surface is provided between the pillars 3, 3,. 3 is a protective body comprising a H-shaped steel 5 whose lower part is embedded and fixed to the concrete foundation 2 and a pipe 6 that is externally mounted on the upper part of the H-shaped steel 5, and the pipe 6 is fixed to the H-shaped steel 5. 6 is provided with a flange 601 at its lower end, a steel flange anchor 9 is inserted into the flange 601, and the lower portion of the flange anchor 9 is embedded and fixed in the concrete foundation 2. Filling material that has flange portions 5F and 5F arranged at the front and rear, and a web portion 5U that connects these flange portions 5F and 5F, and that is filled in the tube material 6 without burying and fixing the lower portion of the tube material 6 to the concrete foundation 2 7 to fix the pipe 6 to the H-shaped steel 5 and prevent it as a protective body. Since the plastic hinge is formed at the lower part of the pipe material 6 due to the impact force applied to the fence 1, when the impact force is applied to the protective fence 1 and a force exceeding a predetermined level is applied to push down the column 3, The lower part is plastically deformed, and a large bending moment is not generated in the lower part of the tube material 6. Thus, since the bending moment which generate | occur | produces in the pipe material 6 can be reduced, the force added to the concrete foundation 2 from the pipe material 6 also becomes small.

  Further, in this embodiment, since the pipe material 6 is fixed to the H-shaped steel 5 as the core material by the filler 7 filled in the pipe material 6, the H-shaped steel 5 and the pipe material 6 are fixed by the filler 7. And the strength of the column is improved by the filler 7.

  Further, in this embodiment, since the installation location is the concrete foundation 2, the force applied to the concrete foundation 2 can be reduced even if an impact force is applied to the protective fence 1 as a protection body. The load is small.

  In this way, in this embodiment, the lower portions of the pillar anchors 8 as a plurality of anchors are embedded and fixed to the foundation, and the upper portions of the pillar anchors 8 are embedded and fixed to the filler 7. The foundation 2 and the pipe material 6 can be integrated via the filler 7.

  In this way, in this embodiment, since the pipe material is a steel pipe, a support structure composed of a steel pipe with the H-shaped steel 5 as a core material is obtained.

In addition, as an effect on the embodiment, the hook portion 601 is provided at the lower end of the H-shaped steel 5 as the core material, and the hook anchor 9 fixed to the foundation concrete foundation 2 is inserted into the hook portion 601, so that the impact force The buttocks anchor 9 corresponds to the applied horizontal force. Further, by disposing the buttock anchors 9 on the left and right within the diameter of the tube material 6, the buttock anchors 9 can be disposed on the center side in the front-rear direction of the upper surface portion 2U, and when subjected to an impact force, 9 can reduce the influence of the force applied to the front and rear surface portions 2M and 2K of the concrete foundation 2.

  9 to 27 show a second embodiment of the present invention, in which the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The figure shows an example in which a buffer device is provided on the net body 4 while being applied to the existing protective fence 101.

  The concrete foundation 2 is provided with a protective fence 101 as an existing protective body. In this existing protective fence 101, the H-shaped steel 5 is erected as a support with a gap from the concrete foundation 2, and a horizontal rope member 102 is stretched in multiple stages between a plurality of H-shaped steels 5, 5. An oblique member 103 as a reinforcing material is provided on the H-shaped steel 5 at both ends, and the oblique member 103 is fixed at the upper part to the upper part of the H-shaped steel 5 and the lower part is fixed to the concrete foundation 2. It is fixed to. In addition, four H-section steel 5 which is an intermediate | middle support | pillar is standingly arranged. Further, a net body (not shown) such as a wire net is stretched between the H-shaped steels 5, 5.

  And in reinforcement of the said existing guard fence 101, a net body is removed on the spot and the horizontal rope material 102 is removed. In this example, since the H-section steel 5 at both ends of the existing protective fence 101 is not improved, the horizontal rope 102 is connected to the H-section steel 5 at one end of the existing fence, so that the horizontal rope is not disturbed by the work. The material 102 can be temporarily placed.

  In the construction, except for both ends of the existing H-shaped steels 5, 5..., The column 3 is mounted as described in the first embodiment by using the H-shaped steel 5 adjacent to both ends and the center that has been skipped by one. To construct. In this case, since the existing H-section steel 5 is used, the construction of the H-section steel 5 is not required, the anchors 8 and 9 are attached on-site, and the H-section steel 5 is covered with the pipe material 6 and integrated with the filler 7. To do. In addition to the horizontal rope member 102 and the net, if there is an existing one that gets in the way when the pipe member 6 is covered with the H-shaped steel 5, it is removed.

  Thus, after constructing the support column 3 including the pipe member 6 having the lower portion connected to the concrete foundation 2 by plastic hinge connection, the following construction is performed to construct the protective fence 1 having a buffer structure and the like.

  Upper and lower lateral rope members 11 and 12 are stretched on the upper and lower sides of the column 3. The upper and lower lateral rope members 11 and 12 can be engaged with and disengaged from the upper and lower rear portions of the support column 3, and upper and lower locking portions 13 and 14 are provided to lock the support columns 3 and 3 at both ends. End portions of the upper and lower horizontal rope members 11 and 12 are connected to the portions 13 and 14.

  In addition, although there is no other horizontal rope material between the upper and lower horizontal rope materials 11 and 12, it can also provide.

  As shown in FIG. 13, the mesh body 4 includes a wire net 21 in which a plurality of oblique wire rods 22, 22 made of a twisted steel wire intersect, and the mesh wire intersection portion 23 of the oblique wire rods 22, 22. The other diagonal wire 22 is inserted into the one diagonal wire 22 and the other diagonal wire 22 is knitted into the one wire 22, and the net crossing portion 23 adjacent in the length direction of the diagonal wire 22 is Crossing portions 23 that are inserted into the other diagonal wire rod 22 and netting intersection portions 23 through which the one diagonal wire rod is inserted are alternately arranged. Further, one diagonal wire 22 of the wire net 21 is disposed obliquely from the upper left to the lower right, and the other oblique wire 22 is disposed in an opposite direction and obliquely directed from the upper right to the lower left. The edge of the mesh body 4 has a mesh body folding portion 24 that is folded back at approximately 90 degrees, and the diagonal wire rods 22 and 22 are continuous at the folding portion 24.

  The diameter of the wire 22 of the wire net 21 is 9 to 14 mm, the tensile strength is 30 to 90 kN, and the diagonal width W of the mesh of the wire net 21 is 300 to 600 mm.

  The wire net 21 is connected to the upper horizontal rope member 11 as a member to be connected using a buffering rope member 40 including a buffer 30 and a wire rope.

  As shown in FIG. 14, the shock absorber 30 is configured by two clamping bodies 31, 31, and a fastening tool 34 such as a fastening U bolt 32 and a nut 33. Two grooves 35 and 35 for accommodating the buffering rope members 40 and 40, respectively, are formed in the sandwiching bodies 31 and 31 so that the buffering rope members 40 and 40 are stored in the grooves 35 and 35, respectively. The U-bolts 32 are inserted into the through holes 36 and 36 of the clamping bodies 31 and 31 and tightened with the nuts 33 to hold the buffering rope members 40 and 40. The clamping force (crimping force) of the buffering rope members 40, 40 can be adjusted by the tightening force of the U bolt 32 and the nut 33. Further, at least one of the cushioning rope members 40 and 40 protrudes an extra length that can slide. The U bolt 32 and the nut 33 hold the end portions 40T, 40T, etc. of the buffering rope material 40 with a predetermined frictional force, and a force to tilt the support column 3 by falling rocks is applied. When acted, the sliding rope members 40, 40 are allowed to slide. By providing the shock absorber 30 in this way, when the tension applied to the shock absorbing rope member 40 from the wire net 21 becomes equal to or higher than a predetermined value, the shock absorbing rope members 40 and 40 frictionally slide with respect to the shock absorber 30. Impact energy can be absorbed effectively.

  As shown in FIG. 15 and the like, one buffer rope member 40 is folded back in a substantially U shape to form a buffer folded portion 41, and the rope members 40, 40 at the ends of the buffer folded portion 41 are A buffer folded loop 42 is formed by gripping with the buffer 30. Further, a metal ring is swaged and fixed to the end portions 40T and 40T of the buffering rope member 40 so that the end portions 40T and 40T are integrated and a stopper 43 is formed.

  Then, the mesh body folded portion 24 is inserted into the buffer folded ring portion 42, and thereby the buffer folded ring portion 42 is locked to the buffer 30. Moreover, the return | turnback ring | wheel part 42 for buffers and the upper horizontal rope material 11 are connected so that attachment or detachment is possible by the shackle 45 which is attachment / detachment connection means.

  As shown in FIG. 16 and the like, the shackle 45 is configured to open and close both ends of the U-shaped main body 46 by inserting nut-attached bolts 47 into the closed main body 46. The ring portion 42 and the upper horizontal rope member 11 are inserted and connected to each other. And the part which protruded on the opposite side of the said buffering | returning ring | wheel part 42 and the buffer 30 becomes the extra length part 44 of the rope material 40 for buffering.

  Further, at the lower edge of the wire net 21, the mesh body folded portion 24 and the lower horizontal rope member 12 are connected by a shackle 45. In addition, by using the shackle 45, the wire net 21 can be moved in the length direction of the horizontal rope members 11 and 12 and a vertical rope member to be described later.

  In this example, a buffer structure 48 is configured by the buffer rope material 40 and the buffer 30.

  As shown in FIG. 15, in addition to the upper horizontal rope material 11, the lower horizontal rope material 12 and the lower net body folded portion 24 of the wire net 21 are connected, or a vertical rope material and a wire net described later. In this case, the lower horizontal rope member 12 and the vertical rope member are connected members. In either case, the mesh body crossing portion 23 may be inserted into the buffer folding ring portion 42 and locked.

  Next, as shown in FIG. 12 and the like, in the support column 3, pin bolts 51, 51 that are connected members are provided horizontally on the upper and lower locking portions 13, 14, and the upper and lower pin bolts 51, 51 are covered with each other. A vertical rope member 52 as a connecting member is stretched. In addition, the ring part 52W is formed in the edge part of the vertical rope material 52, and the pin volt | bolt 51 is penetrated to this ring part 52W. Further, although two pieces of the upper and lower horizontal rope members 11 and 12 and two pieces of the vertical and horizontal rope members 52, 11 and 12 are used, one piece may be used.

In this example, the wire net 21 has a left-right width substantially equal to the distance between the intermediate support column 3 and the end support column 3, and has the mesh body turn-back portions 24 on both left and right edges.

  Then, as shown in FIGS. 17 to 20, in the support column 3 at the end portion, a single rope material 40 is wound around the vertical rope material 52 from the top to the bottom, and the mesh body folded up and down. The buffer rope material 40 is inserted into the portion 24 in order from the top to the bottom and locked, the buffer rope material 40 is passed through the mesh of the wire net 21, and the buffer rope material 40 is connected to the mesh body folding portion 24. The locked portion becomes the mesh body locking portion 61, and the buffer rope material 40 is inserted into all the mesh body folding portions 24 located at the edge of the wire net 21, and as shown in FIG. The upper and lower end portions 40T, 40T of 40 are locked to the upper and lower pin bolts 51 and folded back in the reverse direction, and the folded connected material locking portion 62 is locked to the pin bolt 51 and turned to the opposite end portion 40T. , 40T is polymerized, and this polymerization part End 40T, and 40T is gripped by the bumper 30. Then, the end portions 40T and 40T projecting up and down from the shock absorber 30 become the surplus length portion 44.

  Then, the vertical rope member 52 becomes a core member, and the buffering rope member 40 can be stretched with a predetermined tension.

  Further, as shown in FIGS. 22 and 23, in the intermediate strut 3, the net folding portions 24, 24 are positioned opposite to the left and right sides of the vertical rope member 52, and one buffer rope member 40 is attached. While wrapping around the vertical rope member 52 from the top to the bottom, the buffer rope member 40 is placed on the mesh folding portion 24 arranged in the vertical direction in order from the top to the bottom, and the left and right one and the other mesh members for each step. The portion of the buffer rope 40 that is inserted into and locked into the folded portion 24 and locked to the mesh folded portion 24 becomes the mesh locked portion 61, and the left and right mesh locked portions 61, 61 at each stage. Are placed at substantially the same height, and the buffer rope material 40 is inserted into all the mesh folding parts 24 located on the left and right edges of the both sides of the support column 3, and the upper and lower ends of the buffer rope material 40 are Locked to the pin bolt 51 and folded back upside down, the folded connected material Stop portion 62 is engaged with the pin bolt 51, the end and the opposite portion 40T, polymerizing 40T, end 40T of the overlapping portion, gripping the 40T by the bumper 30. Then, the end portions 40T and 40T protruding upward and downward from the shock absorber 30 become the extra length portions 44 and 44.

  Further, on the outer side in the left-right direction of the support column 3 of the terminal, a cable rope connecting portion 72 is fixed to the upper surface portion 2U of the concrete foundation 2 by an anchor 71. The upper part of 3 is connected by a rope member 73.

  Furthermore, anchors 74 are embedded and fixed on the slopes which are the ground on the front side (mountain side) of all the columns 3, and the anchors 74 and the upper portions of the columns 3 are connected by a reed rope material 75. In this case, a round bar 76 as a locking part is inserted into the upper part of the column 3, the end of the round bar 76 protrudes to the left and right of the column 3, and the holding rope is locked to both ends of the round bar 76. The material 75 is wound around the support 3, and the overlapped portion 75 </ b> K of the wound storage rope 75 is connected to the front of the support 3 by a wire clip 77 serving as a binding means, thereby connecting the storage rope 75 to the upper part of the support 3. .

  As shown in FIG. 27, the wire clip 77 includes a U bolt 78 and a main body 79 through which the U bolt 78 is inserted, and the overlapping portion 75K is sandwiched between the U bolt 78 and the main body 79. It is what you wear.

  Further, the horizontal rope members 102 are provided in multiple stages between the H-shaped steels 5, 5 at both ends by using the H-shaped steels 5, 5 at both ends and the supports 3, 3, 3 between them. As described above, it is advantageous in terms of material cost to use the horizontal rope member 102 of the existing protective fence 101, but a new horizontal rope member 102 may be used as necessary.

  Next, the effect | action is demonstrated about the buffer device of a present Example. In the upper horizontal rope member 11, when the mesh body 4 is subjected to an impact force by falling rocks, collapsed earth or avalanche, tension is generated in the wire net 21, and a force for pulling the mesh folding portion 24 downward is applied. The shock absorber 30 to which the body folding portion 24 is engaged frictionally slides with respect to the extra length portion 44 and absorbs the impact force. Moreover, the amount of bending of the wire net 21 is increased by the movement of the shock absorber 30, the impact force absorption effect is improved, and the force applied to the column 3 and the like can be reduced.

  Furthermore, after the extra length portion 44 is frictionally slid and the stopper 43 is locked to the shock absorber 30, the impact force can be absorbed by the tension of the buffering rope member 40 without frictional sliding.

  Further, in the support column 3 at the end, when the mesh body 4 receives an impact force due to falling rocks, collapsed earth or avalanche, a tension is generated in the wire net 21 and a force for pulling the mesh folding portion 24 toward the center side is applied. As a result, a tension is applied to the buffering rope member 40 to which the mesh body turn-back portion 24 is locked, and the tension is applied to the buffering rope member 40 that forms a loop as a whole, so that the extra length portions 44 and 44 at the end portions. Frictionally slides against the shock absorber 30 and absorbs the impact force. Further, since the buffering rope material 40 having a loop shape as a whole spreads, the amount of bending of the wire net 21 is increased, the impact absorption effect is improved, and the force applied to the column 3 and the like can be reduced.

  Similarly, in the intermediate support column 3, when the mesh body 4 receives an impact force due to falling rocks, collapsed earth or avalanche, etc., tension is generated in the wire nets 21, 21 on both sides of the support column 3, and the mesh body folding portion. As a result, a force is applied to separate the support 24 from the support column 3, whereby a tension is applied to the buffering rope member 40 to which the mesh body folding portion 24 is locked, and a tension is applied to the buffering rope member 40 that forms a loop as a whole. As a result, the surplus length portions 44 and 44 at the end portions slide frictionally with respect to the shock absorber 30 and absorb the impact force. Further, the expansion of the looping rope material 40 that forms a loop as a whole increases the amount of bending of the wire nets 21 and 21 on both sides, improves the impact force absorption effect, and reduces the force applied to the column 3 and the like. . In the case of the intermediate strut 3, when one of the left and right wire nets 21 receives an impact force, the impact force is transmitted to the other wire net 21 by the buffering rope material 40, and the impact force can be dispersed.

  As described above, in this embodiment, the same operations and effects as those of the first embodiment are obtained.

Further, in this embodiment, the shock absorber 30 holding the shock absorber rope material 40 is provided, and the shock absorber rope material 40 slides on the shock absorber 30 by the movement of the mesh member 4 and is added to the mesh member 4. Since the shock absorbing structure 48 that absorbs the shock force is provided, the shock absorber 30 frictionally slides against the shock absorbing rope member 40 to absorb the shock energy when the shock force is applied to the mesh body 4 by falling rocks or the like. When receiving force, the force applied to the concrete foundation 2 from the column 3 can be reduced.

As described above, the present embodiment includes the existing concrete foundation 2 and the H-shaped steel 5 which is a plurality of existing pillars embedded in the lower part of the existing concrete foundation 2. Is an H-shaped steel 5 embedded and fixed, and the H-shaped steel 5 is a reinforcing method of an existing protective body having flange portions 5F and 5F arranged in the front and rear, and a web portion 5U connecting the flange portions 5F and 5F. A flange portion 601 is provided at the lower end of the pipe member 6, a mounting hole 9K is formed in the existing concrete foundation 2, and a lower portion of the steel anchor portion 9 is fixed to the mounting hole 9K, thereby fixing the anchor portion for the flange portion. The lower part of 9 is embedded and fixed in the existing concrete foundation 2, and the pipe material 6 is externally attached to the upper part of the H-shaped steel 5, and the upper part of the anchor part 9 is inserted into the insertion hole 603 of the flange part 601. The existing computer The pipe 6 is filled with a filler 7 without being embedded and fixed to the REIT foundation 2, and the pipe 6 is fixed to the H-shaped steel 5 with the filler 7, and a mesh serving as a protective surface between the pipes 6, 6. Since the body 4 is provided, it is possible to construct the protective fence 1 that can reinforce the existing protective fence 101 and cope with a high impact force, and the load applied to the concrete foundation 2 does not increase. You can use simple or reinforce the foundation.

  Further, as an effect of the embodiment, the height from the upper surface portion 2U is higher than that of the H-shaped steel 5 in the tube material 6, and preferably the height from the upper surface portion 2U is 2 Since it is more than twice, the newly installed support column 3 can be made higher than the H-shaped steel 5 which is an existing support column, and the fence height of the protective fence 1 can be increased.

  Further, as an effect on the embodiment, the support rods 3, 3... Standing at intervals, the mesh body 4 provided between the support posts 3, 3. In the shock absorber for the protection fence network that absorbs the impact force applied to the mesh body 4 by the buffer rope material 40 sliding relative to the shock absorber 30 due to the movement of the mesh body 4, the mesh body 4 is: It has a mesh body folded portion 24 obtained by folding an oblique wire material 22 as a wire material at an edge and a mesh body intersecting portion 23 where the oblique wire material 22 intersects, and the mesh body folded portion 24 or the mesh by the buffering rope material 40 and the cushioning tool 30. Since the body crossing portion 23 is connected to the upper horizontal rope member 11 or the vertical rope member 52 which is the connected material of the protective fence 1, when impact energy is applied to the net body 4 due to falling rocks or the like, the net folding part 24 or the net crossing is performed. The cushioning tool 30 is rubbed against the rope material 40 for cushioning by the portion 23. And the impact energy was absorbed, moreover, by the bumper 30 moves can be made larger amount of deflection of the netting 4, it is possible to enhance the absorbing effect of the impact energy.

  As described above, in the present embodiment, the end portion of the buffer return portion 41 where the buffer rope material 40 is folded back is gripped by the buffer 30 to form the buffer return ring portion 42, and this buffer return ring portion. 42 is connected to the upper horizontal rope member 11 which is a connected material, and the mesh body folded portion 24 or the mesh body intersecting portion 23 is locked to the buffer folded ring portion 42, so that impact energy is applied to the mesh body 4 by falling rocks or the like. Then, the shock absorber 30 frictionally slides against the shock-absorbing rope material 40 by the mesh body folding portion 24 or the mesh body crossing portion 23 that is locked to the shock absorber 30 and absorbs impact energy. By moving, the amount of bending of the net 4 can be increased, and the impact energy absorption effect can be improved.

  Further, in this embodiment, since the mesh folding part 24 or the mesh crossing part 23 is inserted and locked in the buffer folding ring part 42, the mesh folding part 24 or the mesh folding part 24 or By inserting the mesh body crossing part 23, it can be locked to the shock absorber 30, and a shock absorber with a simple structure can be obtained.

  As described above, in this embodiment, the buffer rope material 40 is inserted into the plurality of mesh body folding portions 24 or the plurality of mesh body intersection portions 23, and the both end portions 40T and 40T of the buffer rope material 40 are reversed. Since these folded portions are locked to the pin bolts 51 and 51 which are connected portions of the protective fence 1, the opposite end portions 40T and 40T are overlapped, and this overlapped portion is gripped by the buffer 30, so that the mesh body When impact energy is applied to 4 by falling rocks or the like, tension is applied to the buffering rope material 40 inserted through the plurality of mesh folding portions 24 or mesh intersections 23, thereby grasping the overlapping portions of both end portions 40T and 40T. The end portions 40T, 40T of the buffer rope material 40 are frictionally slid against the shock absorber 30 to absorb impact energy, and the amount of deflection of the net body 4 is reduced by the frictional sliding of the buffer rope material 40. Can take listening, it is possible to enhance the absorbing effect of the impact energy.

  Furthermore, as an effect of the embodiment, since the buffer rope material 40 is locked to the plurality of mesh folding portions 24 at the edge of the wire net 21, the end of the wire net 21 is simultaneously applied by one buffer solder material 40. The edge can be connected to the column 3.

  FIG. 28 shows a third embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-described embodiments, and detailed description thereof will be omitted. As shown in the figure, the wire net 21 of this example is provided with cross connecting wires 91 and 92 at the crossing portion 23 of the oblique wires 22 and 22, and both ends of one cross connecting wire 91 are connected to each other. Fixing portions 91K and 91K wound in a coil shape are formed on both sides of the crossing portion 23 of one diagonal wire 22 and these fixing portions 91K and 91K are connected by a central portion 91C of the cross connecting wire 91. Fixing portions 92K and 92K are formed by winding both ends of the other cross-connecting wire 92 in a coil shape on both sides sandwiching the intersection of the other oblique wire 22, and these fixing portions 92K and 92K are the central portions of the cross-connecting wire 92. If the force which is connected by 92C and is going to move an intersection location is added, these intersection connection wire materials 91 and 92 will oppose.

  As described above, in this embodiment, the same operations and effects as the above-described embodiments are obtained.

In addition, various types of connection structures can be used for the connecting portion 23 of the wire net 21 in this way.

  In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, the net body can have various shapes. Further, in the embodiment, the pipe material having a circular cross section is exemplified, but a square cross section may be used. Furthermore, the steel pipe used for the pipe material may be other than a circular cross section or a square steel pipe. The cement-based filler used for the filler may be concrete or cement milk as long as cement is mixed. Further, the detachable connecting means for movably connecting the net body to the upper and lower edge rope members is not limited to the shackle, and various devices can be used as long as they have a ring through which the rope member or the like is inserted. Further, in the examples, the rope material is made of steel, but other than that, synthetic resin or the like can be used. Further, the number of intermediate struts may be two or more. Also in the embodiment in which the stopper is not shown, the stopper can be provided at the end of the buffer rope material. Furthermore, any rope material used in the present invention has flexibility. In the embodiment, the upper and lower horizontal rope members and the vertical rope member are shown as examples of the members to be connected. However, the upper and lower rope members are made of a hard material that connects the upper and lower sides of the column, and the upper and lower rope members. Alternatively, a connected material may be used, or a vertical rod made of a hard material provided vertically on the support may be used instead of the vertical rope material. Further, an auxiliary net having a smaller mesh and a thinner wire may be superimposed on the wire net.

1 Guard fence 2 Concrete foundation (installation location)
3 Prop 4 Net 5 H-section steel (core material)
5F Flange 5U Web 6 Tubing 7 Filling 8 Prop Anchor 9 Butt Anchor 9K Mounting Hole 11 Upper Rope Material (Connected Material)
12 Lower horizontal rope material (connected material)
21 Wire net 22 Diagonal wire 23 Net body intersection 24 Net body folding part 30 Shock absorber 40 Buffering rope material 40T End 41 Buffer folding part 42 Buffer folding ring part 43 Stopper 45 Shackle (detachable connecting means)
51 pin bolt (connected material)
52 Vertical rope material (connected material)
101 Existing Guard Fence 601 Ridge 603 Insertion Hole

Claims (4)

The pillars are erected on the concrete foundation with a space left and right, and a protective surface is provided between the pillars, and the pillars are H-shaped steel in which the lower part is embedded and fixed to the concrete foundation, and the upper part of the H-shaped steel. In the protective body provided with a tubular material to be sheathed and fixed to the H-shaped steel, a collar is provided at the lower end of the tubular material, and a steel collar anchor is inserted into the collar, The lower part of the anchor is embedded and fixed in the concrete foundation, and the H-shaped steel has a flange part arranged at the front and rear, and a web part connecting the flange parts, and the lower part of the pipe material is fixed in the concrete foundation. A protective body characterized in that the pipe material is fixed to the H-shaped steel with a filler filled in the pipe material without doing so. The protective body according to claim 1, wherein lower portions of a plurality of support anchors are embedded and fixed in the concrete foundation, and upper portions of the support anchors are embedded and fixed in the filler. The protective body according to claim 1 or 2, wherein the pipe material is a steel pipe. It comprises an existing concrete foundation and a plurality of existing struts embedded in the lower part of the existing concrete foundation, and the existing strut is an H-section steel in which the lower part is embedded and fixed, and the H-section steel is In the method for remodeling an existing protective body having a flange portion arranged on the web and a web portion connecting the flange portions, a flange is provided at the lower end of the pipe material, and a mounting hole is drilled in the existing concrete foundation. The lower portion of the steel anchor is fixed to the existing concrete foundation, the pipe is covered on the upper portion of the H-shaped steel, and the flange is fixed. The upper part of the anchor for the buttock is inserted into the insertion hole of the pipe, and the filler is filled in the pipe without filling and fixing the lower part of the pipe to the existing concrete foundation. Wherein said pipe member is fixed to H-section steel, method for retrofitting existing protective body and providing a protective surface across a plurality of said tubing.

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