JP3954852B2 - Rock fall prevention wall with buffer mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a rock fall prevention wall for protecting roads, railways, buildings, and the like in mountainous areas and steep slopes from falling rocks.
[0002]
[Prior art]
  Conventionally, as a cushioning material that prevents damage caused by direct falling rockfall against the rockfall prevention wall and absorbs an impact used for the rockfall prevention wall having a buffering action, (1) JP-A-8-68016 or actual fairness As shown also in 6-26566 gazette, sand (sand cushion) can be used, or (2) as described in Japanese Patent Laid-Open No. 9-88015 or Japanese Patent No. 2645484, Use foaming synthetic resin material, or (3) use sand, foamed material or mixed composite material with sand, as described in Japanese Patent Application Laid-Open No. 2000-144644, As described in Japanese Patent No. 6-74611, old tires are used, or (6) as described in Japanese Patent No. 2785177, a rubber material or resin is made solid or hollow in cross section. Block Or use buffer material was was using (7), as described in JP-A-9-242025, cushion material filled with shock-absorbing material.
[0003]
[Problems to be solved by the invention]
  In the case of sand as the cushioning material, the weight is heavy and the transportation cost is high, and it is relatively expensive. Further, in the case of a foamed synthetic resin material, there are problems such as being expensive, and since it is a substance that is not compatible with the natural environment, there is a problem that when the buffer material is damaged, chemical treatment costs are also incurred. In the case of an old tire, there is also a problem that rainwater accumulates in the tire and mosquitoes are generated. In the case of a shock absorber made of rubber, resin or synthetic resin, there is a problem that the price is high. Moreover, when using wood itself, there exists a problem that buffer performance is comparatively low.
[0004]
  The present invention provides a rockfall protection wall having a low-cost economical and good workability buffer mechanism by using a buffer material using wood chips that can effectively use woody materials such as thinned wood. Objective.
[0005]
[Means for Solving the Problems]
  In order to advantageously solve the above problem, in the rock fall prevention wall having the buffer mechanism according to claim 1,This is a buffer block with a hollow cross section made of wood chips or compression molded, and the buffer block reinforced with a reinforcing member on the inner side of the buffer block is installed on the surface that receives the rock fall of the rock fall prevention wall body Characterized by.
[0006]
  Also,Claim2In the invention of claim1In the invention described in (1), a cushioning block having a hollow section is attached to the mold member on the front surface of the rock fall prevention wall main body through a strip in the hollow portion.
[0007]
  Furthermore,Claim3In the rockfall prevention wall having a buffer mechanism, a cushioning material formed by inserting a plurality of buffering blocks formed by molding or compression molding wood chips is attached to the surface of the rockfall prevention wall body receiving the rockfall. It is characterized by that.
[0008]
  Furthermore,Claim4In the invention of claim3In the invention described in item 3, the storage box is made of a steel plate.
[0009]
  Also,Claim5In the invention of claim3 or 4The rock fall prevention wall having the buffer mechanism according to claim 1, wherein the buffer block is attached to a box body or a lid of the storage box.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
  Next, the present invention will be described in detail based on the illustrated embodiment.
[0011]
<referenceFirst Embodiment>
  1 to 3Is for reference1 shows an embodiment, FIG. 1 is a partially longitudinal side view showing a rock fall prevention wall having a buffer mechanism, FIG. 2A is a plan view showing a part of FIG. 1, and FIG. ) Is a partially cutaway perspective view showing a state where a bag body is filled with wood chips and sealed.
[0012]
  In this embodiment, a large number of main pillars 2 such as H-shaped steel are tilted upright at an upper end portion of a reinforced concrete foundation or retaining wall 1 having a substantially L-shaped cross section at intervals in the left-right direction. The lower end portion of the main column 2 is fixed to the foundation or retaining wall 1 by anchor bolts 4, and a holding column 3 such as H-shaped steel is erected on the back side of the main column 2, and the upper end of the holding column 3 The part is detachably fixed to the main pillar 2 by bolts and nuts 5, and the lower end part of the holding pillar 3 is seated on the upper surface of the foundation or retaining wall 1 at a low level position, and is anchored by the anchor bolt 6. The lower part of the main pillar 2 and the lower part of the holding pillar 3 are fixed to each other by a support frame member 7 such as H-shaped steel and connected by bolts and nuts 5.
[0013]
  On the steep slope 50 side on the front side of the main pillar 2, a mold member 8 such as a horizontal horizontal beam made of H-shaped steel or the like is disposed at right angles so as to be spaced apart in the vertical direction and extend in the horizontal direction. The flange on the front side of the main pillar 2 and the flange on the back side of the mold member 8 are detachably fixed by bolts and nuts 9 to form a rock fall prevention wall main body 10 in one form. The front side of the mold member 8 is a surface side that receives falling rocks.
[0014]
  When a large number of wood chips 11 obtained by crushing thinned timber such as cedar into chips are filled or pushed into the bag 12 made of a flexible material, voids are formed even when the wood chips 11 are in contact with each other. After forming and doing so, the bag body 12 is sealed to form a cushioning material 13 composed of a long bag body 12 in which wood chips 11 are packed, and spaced apart in the vertical direction. The cushioning material 13 is placed so as to be placed on the mold material 8, and the upper-end mold material 8 and the lower-end mold material are attached to a fitting 14 such as a U-shaped bolt and a nut or a strip such as a wire as appropriate. A rock fall prevention wall 15 having a buffer mechanism is fixed. In addition, a buffer layer 31 is formed by the large number of wood chips 11 described above.
[0015]
  As the bag 12 made of the flexible material, a cloth-like bag is formed on the inside, and the surface side is coated with, for example, a water-resistant flexible resin or weather-resistant rubber in order to improve the weather resistance. If used, the wood chip 11 in the bag 12 is not corroded by moisture, so that the cushioning material 13 can be used in a stable state over a long period of time.
[0016]
  The features of the present invention are the same in the following embodiments, but the greatest feature is that the wood chip 11 is used as a cushioning material, and the wood chip 11 is also constituted by using a thinning material. Then, the main body portion of the buffer material 13 can be manufactured at a low cost, and in the present situation where it is difficult to process the thinned material, it is very useful and has an environment-friendly configuration.
[0017]
  As a means for sealing the bag body 12, in this embodiment, the wood chip 11 is pressed and filled, and the bag body 12 is sealed by binding the upper end portion of the bag body 12 with a weather-resistant string 16 from the outside. The block-shaped cushioning material 13 is reversed and arranged so that rainwater does not enter from the portion bound by the string 16. In addition, since the engagement convex part 17 etc. are provided in the intermediate part of the said bag body 12, since it engages with the mold material 8 and does not shift | deviate downward, it is possible to install the shock absorbing material 13 in a predetermined position. It can be done easily.
[0018]
<referenceSecond Embodiment>
  3 to 5 arereferenceFIG. 3 is a partially longitudinal front view of a rock fall prevention wall having a buffer mechanism, and FIG. 4 (a) is a partial plan view of FIG. 3. FIG. 4B is a longitudinal side view showing the attachment portion of the wood chip storage box, and FIG. 5 is a plan view showing the attachment portion of the wood chip storage box.
[0019]
  In this embodiment, the buffer material 13 is configured such that a large number of wood chips 11 are sealed in a synthetic resin or metal wood chip storage box 18, and the same parts as in the first embodiment are described. Only the different parts with the same reference numerals will be described.
[0020]
  In this embodiment, a box-shaped wood chip storage box main body 22 constituted by a bottom plate 19, upper and lower side plates 20, and left and right side plates 21 is made of a metal wood chip storage box 18 made of synthetic resin or steel plate. And an upper box-like lid 26 constituted by an upper surface plate 23, upper and lower side plates 24, and left and right side plates 25, and the left and right side plates 21 of the wood chip storage box body 22 have upper and lower side plates 21. In the vicinity of both end portions in the direction, mounting flanges 27 having bolt insertion holes so as to protrude laterally are integrally provided.
[0021]
  In addition, a lid mounting piece 28 having a long hole 29 extending in the front-rear direction (thickness direction of the buffer box) is integrally provided in each side plate 25 in the middle portion of the left and right side plates 25 in the lid 26. The left and right side plates 21 of the wood chip storage box main body 22 are provided with at least one bolt fixing female screw hole at a position in the front-rear direction corresponding to the long hole. As shown in a) and (b), in a state where the wood chip 11 is filled, the lid 26 is engaged with the wood chip storage box 18 by being screwed into the female screw hole and is screwed into the wood chip storage box 18 by a stepped bolt or bolt 30. Are combined. By removing the bolt 30, the lid 26 may be removed and the wood chip 11 may be filled. In this embodiment, in order to enhance the buffering property by the buffer layer 31 composed of the large number of wood chips 11, in this embodiment, the wood chip 11 is filled more than the depth of the wood chip storage box main body 22 to form the buffer layer 31. It is thick.
[0022]
  When the wood chip storage box 18 of this embodiment is attached to the mold member 8, the wood chip storage box main body 22 and the mounting flange 27 are placed on the mold member 8 at the upper end level and mounted on the mold member 8 at the lower end level. The wood chip storage box 18 is detachably fixed to the mold member 8 by the bolts 32 inserted through the mounting flanges 27 and the bolt insertion holes of the front flange of the mold member 8 and the nuts screwed thereto. Has been. Although it can be fixed to the mold material 8 also by this attachment form, a U-shaped bolt 33 is disposed so as to penetrate the wood chip storage box 18 and extend to the back side of the mold material 8 as shown in the figure. Then, it may be inserted into a metal L-shaped member 34 made of steel or the like disposed so as to contact the back side of the mold member 8 and may be fixed by a nut. You may make it employ | adopt any one attachment means of this attachment form. In the case of the U-shaped bolt described above, when receiving a falling rock and shock-supporting while deforming the storage box 18 so as to be thin in the thickness direction, the threaded portion of the U-shaped bolt 33 is free to the rear of the mold 8. The wood chip 11 can be moved backward, and the buffering function of the wood chips 11 can be exhibited without hindering the buffer function of the many wood chips 11.
[0023]
  When the U-bolt mounting means is employed, as shown in FIG. 4 (b), U-bolt insertion cylinders 35, 36 are attached to the bottom plate 19 of the wood chip storage box body 22 and the top plate 23 of the lid 26. If the cylindrical body 36 on the lid 26 side penetrates the cylindrical body 35 on the wood chip storage box main body 22 side, which is a lower level, the rainwater will flow from the cylindrical body 36 on the lid 26 side to the wood. Since it can prevent entering the inside of the chip storage box main body 22, it can be prevented that the wood chip 11 is corroded, and the buffer performance is not deteriorated over a long period of time, which is preferable. When a seal between the wood chip storage box body 22 and the lid 26 is required, a seal material is provided on the entire inner surface of the peripheral side plate of the lid 26, and the seal material is used as the wood chip storage box. You may make it contact | abut to the outer surface of the main body 22, or while providing the outer surface of the surrounding side plate of the lid | cover 26 and the outer surface of the wood chip storage box main body 22, the flexible adhesive sealing material 51 is provided in the whole circumferential direction. It may be sealed.
[0024]
  Further, when the top plate-attached lid 26 is used as in this embodiment, even when the falling stone 37 collides with a part of the top plate-attached lid 26 (see FIG. 19c), impact force is applied to the wood chip layer of the entire box. By transmitting, the impact force can be buffered and relaxed.
[0025]
  As a modification of this embodiment, as shown in FIG. 6, the wood chip storage box 18 filled with wood chips may be installed in a plurality of stages such as two stages in the front-rear direction. In this case, as a means for attaching each wood chip storage box 18, the first-stage wood chip storage box 18 is attached to the mold 8 with bolts, and then the second-stage wood chip storage box 18 is superposed on the first stage. After being mounted on the cylindrical body 35 and 36 of the second-stage and first-stage wood chip storage boxes 18 by the long U-bolts 33, the L-shape on the back side of the mold member 8 is inserted. The member 34 may be fixed with a nut.
[0026]
  <Third Embodiment>
  7 and 8 (a) show a third embodiment of the present invention, in which FIG. 7 is a partially longitudinal front view showing a rock fall prevention wall having a buffer mechanism, and FIG. 8 (a) is FIG. It is a top view which shows a part. This embodiment is a form in which a large number of wood chips 11 are molded or compression-molded appropriately with an adhesive interposed therebetween to form a hollow cylindrical block-shaped cushioning material 13,referenceThe same parts as those in the first embodiment are denoted by the same reference numerals, and different parts will be mainly described.
[0027]
  In this embodiment, as described above, a large number of wood chips 11 are molded with an adhesive interposed therebetween, and are formed into a buffer material 13 by a plurality of block-shaped buffer blocks 13a integrated in a hollow cylindrical shape, Alternatively, when a large number of wood chips 11 are compression-molded to form a cushioning material 13 by a hollow cylindrical integrated block-shaped buffering block 13a, and the pressure during compression molding is adjusted, the cushioning material block 13a The void ratio inside can be adjusted. Note that a large number of wood chips 11 may be compression-molded with an adhesive interposed therebetween to form a hollow cylindrical integrated block-shaped cushioning material 13.
  As known in the art, a laminated material having almost no voids is not preferable because of its low buffering performance.
[0028]
  The rectangular block-shaped hollow cylindrical buffer block 13a configured in this way is arranged in series in the vertical direction so as to be placed on the upper surface of each mold member 8, thereby configuring the long block buffer material 13 In addition, a metal strip 38 made of a synthetic resin having a predetermined length or a wire, such as a wire, is disposed so as to pass through the hollow portion 52 of each cushioning material 13. Both ends are locked to the ring portions of the eyebolts 39 in the turnbuckle 40 provided with eyebolts 39 having different screw directions, and the turnbuckles 40 are arranged on the back side of the mold member 8 to be tensioned. In this configuration, the block cushioning material 13 is fixed. A plurality of the strips 38 may be used and fixed. The hollow portion 52 may be reinforced by a reinforcing member 53 made of a synthetic resin tube or a metal tube.
[0029]
  As shown in FIG. 8 (b), a cylindrical buffer block 13 a may be arranged in series to form a long buffer material 13, and may be tension-fixed by a strip 38.
[0030]
  Moreover, as shown in FIG. 9A or 9B, the block-shaped cushioning material 13 may be installed in a plurality of stages as the above-described modification. In this case, as a means for fixing the second-stage cushioning material 13, it may be fixed to the mold material 8 with a strip 38 and a turnbuckle, and as shown in FIG. You may make it fix with the strip 38. FIG.
[0031]
  FIG. 10 is an explanatory view when the hollow cylindrical buffer block 13a receives an external force, and the hollow cylindrical buffer block 13a as shown in FIG. When an external force is applied as shown in FIG. 10, first, the wood chip layer 41 in the middle part (low-intensity part A in the figure) on both sides of the hollow part is crushed and buffered, and then FIG. ), The wood chip layer 42 in the upper and lower portions has a double structure in which a buffer resistance is provided. In this case, it is desirable to increase the compressibility of the wood chip layer 42 in the upper and lower parts than the wood chip layer 41 in the middle part (low strength part) on both sides of the hollow part because the amount of energy absorption is high.
[0032]
  FIG. 11 shows a modification of the hollow cylindrical buffer block 13a. As shown in (a), (c) and (d), on one end side of the hollow portion in the hollow buffer block 13a, An insertion joint 43 made of a steel tube or a synthetic resin tube and having a rectangular tube-like insertion convex portion is fitted into the hollow buffer block 13a in advance or after the molding, and the steel tube or the synthetic resin tube. The base end side of the hollow cushioning block 13a is inserted up to the middle in the axial direction and is fixed and reinforced by an adhesive or press-fitting, and the other end of the hollow part is provided with a recess 44 for fitting. A block 13a for use is shown. In the case of such a form, as shown in (b), compared with the case where it does not provide, strength can be improved and a comparatively big energy can be absorbed.
[0033]
  Further, as shown in FIGS. 11D and 11E, when a plurality of hollow buffer blocks 13a are connected in series, the adjacent fitting joint 43 and fitting recess 44 are fitted and fixed. The wood chips 11 are not damaged by the strips 38.
[0034]
  Further, as shown in FIGS. 12A and 12B, the hollow buffer block 13a includes a hollow cylindrical buffer block 13a, a cylindrical insertion joint 43, and a fitting recess 44 having a circular cross section. Alternatively, as shown in FIGS. 12C and 12D, a hollow triangular prism-shaped buffer block 13a, a triangular tubular insertion joint 43, and a fitting recess 44 having a triangular cross section may be used. When these are attached, they can be attached in the same manner as in the embodiment described above, and may be stored in the storage box 18 and used as shown in the embodiment described later. Since other configurations are the same as those of the above-described embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.
[0035]
  FIG. 13 shows another form of the buffer block 13a, which may be in the form of a block as shown in FIG. 13B. However, as shown in FIG. Molding or compression with a ball or hollow body or hollow elastic body 45 made of synthetic resin or the like previously encapsulated with air or compressed air at the time of compression molding or molding with an adhesive. When the hollow buffer block 13a is formed by molding, as shown in FIGS. 13C and 13D, when external force such as falling rocks acts, the impact absorbability can be increased by the elasticity of the air pressure.
[0036]
  Similarly to the above, a plurality of spherical hollow elastic bodies 45 may be arranged in advance as shown in FIG. 13 (e), and a cubic hollow elastic body 45 is formed as shown in (f). The buffer block 13a may be configured by being disposed inside during compression molding. When these buffer blocks 13a are used, the buffer material 13 composed of a plurality of or one buffer block 13a is fixed to the mold member 8 by a strip 38 such as a rope, although it depends on the length. Alternatively, it can be used as the cushioning material 13 housed in the storage box 18.
[0037]
<Fourth embodiment>
  14 and 15 show a rock fall prevention wall having a buffer mechanism according to a fourth embodiment of the present invention. FIG. 14 is a partially longitudinal front view of the rock fall prevention wall having the buffer mechanism, and FIG. FIG. 15 is a plan view mainly showing the mold member 8 and the storage box 18 in FIG. 14, and FIG. 15 (b) is a longitudinal side view showing the mounting portion of the wood chip storage box.
[0038]
  In this embodiment, a storage box similar to the storage box 18 shown in FIG. 3 is used, and instead of a loose piece of wood chips, a plurality of block-shaped buffer blocks 13a molded or compression-molded via an adhesive material are used. This is a form in which the cushioning material 13 composed of the storage box 18 arranged in the inside is fixed to the mold material 8. In this embodiment, the hollow through-hole of the square cylinder-shaped buffer block 13a is arranged so as to face the thickness direction of the box 18, and a tube as a reinforcing member for increasing rigidity is not arranged in the hollow portion. However, it may be arranged so as to face in the vertical direction as shown in FIG. 7, and in that case, it may be replaced with a buffer block 13a shown in FIGS.
  When the buffer block 13a is fixed to the storage box 18, although not shown, the buffer block 13a may be fixed to the lid 26 or the box body 22 with an adhesive or a bolt such as a U-shaped bolt. Alternatively, the box body 22 may be provided with an inward convex portion in advance to position the buffer block 13a. The buffer blocks 13a may be densely arranged in the box body 22, and if necessary, the space between the buffer blocks 13a or the hollow portions of the buffer blocks 13a is filled with loose wood chips so as to make appropriate gaps. May be. Since the other configuration is the same as that of the second embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.
[0039]
  When the buffer block 13a is arranged in the storage box 18, the buffer block 13a may be arranged at equal intervals in the horizontal direction and the vertical direction as shown in FIG. 16 (a). As described above, the relatively long buffer blocks 13a may be arranged at equal intervals in the left-right direction, or may be stored and arranged at equal intervals in the vertical direction, so that the buffer material 13 sealed by the storage box 18 may be used. FIG. 17 (a) is a cross-sectional view of FIG. 16 (a) or (b). As in the form shown in FIG. 16 (or FIG. 19c), the sealed box-like body can protect the wood chip from moisture, heat, and the like. In this case, as shown in FIG. 17 (b), the lid and the box body 22 may be in close contact with each other and sealed, or although not shown, it may be sealed with a sealing material. In the case of such a storage box 18, it is good to manufacture with the material which does not reduce the buffer performance of the buffer material 13, for example, synthetic resin.
[0040]
<Fifth Embodiment>
  18 and 19 (a) show a rock fall prevention wall having a buffer mechanism according to a fifth embodiment of the present invention. FIG. 18 is a partially longitudinal front view of the rock fall prevention wall, and FIG. 19 (a). FIG. 4 is a cross-sectional plan view showing a storage box attached state.
[0041]
  In this embodiment, the groove-shaped member is used as a storage box, and the groove portion 47 of the storage box 18 having a cross-sectional groove shape is placed on each mold member 8 so as to extend in the vertical direction. Each side plate 21 is provided with a mounting flange 27, the mounting flange 27 is fixed to the mold 8 with bolts and nuts 32, and a support portion 48 is provided integrally with the bottom plate 19 at the lower end of the groove 47. It has been. In the state where the buffer block 13a located at the lowermost stage is supported on the support portion 48, the buffer blocks 13a are sequentially placed upward in series to form the buffer material 13.
[0042]
  Then, similarly to the embodiment shown in FIG. 7, a predetermined length of weather-resistant synthetic resin or metal strip 38 is inserted into the hollow cylindrical cushioning material 13, and each of the strips is inserted. The body 38 is engaged with the ring portion of each eyebolt 39 in the turnbuckle 40 provided with eyebolts 39 having different screw directions at both ends of the body 38, and the turnbuckle 40 is disposed on the back side of the mold member 8 to provide the strip 38. It is a form in which each buffer block 13a is fixed by tension.
[0043]
  In addition, although it is the same also in each said embodiment including the said 5th Embodiment, it prevents that the impact force acts on the buffer material 13 locally by the falling rock 37, and the some buffer block 13a or the buffer material 13 is prevented. 19 (b), as shown by a two-dot chain line in FIG. 19 (a), on the surface side of the cushioning block 13a or the cushioning material 13 so that the impact force is relaxed and transmitted. An impact load distribution support plate 49 (specific members will be described later) such as a steel deck plate having a corrugated cross section is fixed to the storage box 18 or the mold member 8 with bolts 54 such as U-bolts and nuts 55, or illustrated. Although it is omitted, it may be fixed to the storage box 18 or the mold material 8 with a strip, or may be fixed to the lid 26 with a bolt or the like, or may be fixed to the buffer material 13 with an adhesive or a bolt. Although not shown in the figure, when there is a lid 26, the upper surface plate (surface plate) 23 itself of the lid 26 is continuous in the vertical direction in the waveform cross section in the left-right direction, and the impact load distribution support plate 49 is provided. May also be used.
  Further, as shown in FIG. 1 and FIG. 7, the buffer material 13 and the mold material 8 may be brought into direct contact with each other on the back surface side of the buffer material 13, but the contact surface on the back surface side of the buffer material 13 is increased. Therefore, like the bottom plate 19 of the storage box 18, a support plate (bottom plate 19) such as a steel plate is disposed on the back side of the cushioning material 13 and fixed to the mold 8, and the support plate (bottom plate from the back side of the cushioning material 13 is placed. 19), the impact force may be relaxed and transmitted to the mold member 8. In addition, when the cross-sectional groove type is like the storage box 18 having the side plate, the bending rigidity becomes high, and when there is a rock fall, the storage box 18 is supported while bending and deforming (absorbing energy from the rock fall). Can do.
[0044]
  The groove-shaped storage box 18 may be a groove-shaped storage box 18 that can store one row or a plurality of stages of cushioning material 13. Moreover, although it is the same also in the said embodiment, it is good also as one long hollow cushioning material 13. FIG. Other configurations are the same as those in the above-described embodiment, and thus the description thereof is omitted.
[0045]
<Sixth Embodiment>
  20 and 21 show a rock fall prevention wall having a buffer mechanism according to the sixth embodiment of the present invention. FIG. 20 is a partially longitudinal side view of the rock fall prevention wall, and FIG. (B) is a vertical side view which shows the attachment part of a wood chip storage box.
[0046]
  In this embodiment, the storage box 18 (or the bag body 12) can be attached to the front side flange 8a of the mold 8 and the tip of the U-shaped bolt 33 is inserted into the front side flange of the mold 8. And is fixed by a nut 46. Thus, if it fixes to the mold material 8, the buffer material 13 can be attached to the rock fall prevention wall main body 10 by the short U-shaped bolt 33, and the storage box 18 is thinned in the thickness direction by receiving the rock fall. In the case of buffer support while deforming, the U-shaped bolt 33 can be moved backward to the other flange of the mold member 8. In this case, the mounting flange 27 and the bolt / nut 32 may be omitted. Since other configurations are the same as those of the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.
[0047]
  When the present invention is carried out, for example, as shown in FIG. 22 (a), a plate-like impact load distribution is provided so as to cover the entire buffer blocks 13a in the storage box 18 in which a plurality of buffer blocks 13a are stored. The support plate 49 may be placed on each buffer block 13a, and as shown in FIG. 22 (b), when the storage box 18 is not used, it extends over a plurality of buffer blocks 13a. The plate-like impact load distribution support plate 49 may be placed on each buffer block 13a and attached by the same attaching means as described above. As the above-mentioned impact load distribution support plate 49, it is preferable to use a face plate member made of a material having such a rigidity as to disperse the impact load, such as an expanded metal or a veneer plate, in addition to the above-described deck plate made of steel or the like. When such an impact load distribution support plate 49 is used, the impact load of the falling rock is distributed and transmitted through the impact load distribution support plate 49, and is transmitted to the wood chip block (or the wood chip buffer layer). It is possible to make the burden almost even, thereby reducing the damage of the cushioning material 13 and preventing the local impact force on the rockfall prevention wall from increasing, and to the rockfall prevention wall. Can reduce the impact.
[0048]
  As described above, in the present invention, when a large number of wood chips 11 are used in a loose state, the bag body 12 or the storage box 18 made of a flexible material is filled into the cushioning material 13. . In addition, when a large number of wood chips 11 are made into a block shape, they are molded using an adhesive so as to form a void portion so as to have a buffering performance, or compression molded without using an adhesive. As the buffer block 13a, the buffer material 13 can be used alone, or provided in the sealed storage box 18 or the grooved storage box 18 as the buffer material 13.
[0049]
  In carrying out the present invention, the buffer block 13 molded or compression molded may be sealed in the bag 12 made of a flexible material having weather resistance and water-stopping property. In this way, it is not necessary to perform weather resistance treatment or water absorption prevention treatment (water repellent treatment) on each buffer block 13 itself.
[0050]
  Further, when the buffer block 13a is fixed in the storage box 18, it may be fixed by a bolt or an adhesive.
[0051]
  Further, a net or bag or porous bag filled with wood chips may be disposed in the storage box 18 or disposed in the bag body 12.
[0052]
【The invention's effect】
  According to the present invention, since wood chips that are friendly to the environment are used, it is possible to provide a rockfall prevention wall having a buffer mechanism equipped with a buffer material suitable for the natural environment. Since it can be used, the treatment of thinned wood has become a problem. In Japan, it can be matched with the national policy to cultivate forests, and inexpensive thinned wood can be used. In addition, since the wood chip is lightweight, it can be easily transported and installed, and the construction cost can be reduced. Installation is easy, and the rock fall prevention wall can be built at a relatively low cost.
[0053]
  In addition, whether the wood chip is in a loose state or in a block state, it is sealed in a flexible bag or placed in a storage box 18 having a lid-shaped storage box or a cross-sectional groove-shaped member so that a cushioning material can be easily provided. Can be configured.
[0054]
  If a plate-like member for dispersing the impact load is provided on the surface side of the shock absorbing material that receives the falling rock, the impact load of the falling stone is dispersed and transmitted via the impact load distributing support plate 49 to damage the shock absorbing material. In addition, it is possible to reduce the impact on the rockfall prevention wall by preventing the local impact force on the rockfall prevention wall from increasing.
[Brief description of the drawings]
[Figure 1]referenceIt is a partial vertical side view which shows the rock fall prevention wall which has a buffer mechanism which concerns on 1st Embodiment.
2A is a plan view showing a part of FIG. 1, and FIG. 2B is a partially cutaway perspective view showing a state in which a bag is filled with wood chips and sealed.
[Fig. 3]referenceIt is a partially longitudinal front view which shows the rock fall prevention wall which has a buffer mechanism of 2nd Embodiment.
4A is a plan view of a part of FIG. 3, and FIG. 4B is a longitudinal side view showing a mounting portion of a wood chip storage box.
FIG. 5 is a plan view showing a mounting portion of a wood chip storage box.
FIG. 6 is a partial plan view showing a case where wood chip storage boxes are provided in two stages.
FIG. 7 is a partially longitudinal front view showing a rock fall prevention wall having a buffer mechanism according to a third embodiment of the present invention.
8A is a plan view showing a part of FIG. 7, and FIG. 8B is a plan view showing another example.
9A is a plan view showing a form in which square buffer blocks for wood chips are provided in two stages, and FIG. 9B is a plan view showing a form in which columnar blocks for wood chips are provided in two stages. It is.
FIG. 10 is an explanatory view when a hollow cylindrical buffer block receives an external force, (a) shows one form of a hollow cylindrical buffer block, and (b) shows a case where an external force is received. FIG. 6 is an explanatory diagram showing that the middle portion first performs buffer resistance, and FIG. 8C is an explanatory diagram showing that the upper and lower portions subsequently perform buffer resistance.
FIG. 11A is a perspective view showing a rectangular buffering block in which a hollow buffering block is provided with a fitting for insertion and a recessed part for fitting, FIG. 11B is a front view showing a case where the block is not provided, and FIG. (A) is a front view, (d) is an explanatory view when two buffer blocks are fitted, and (e) is a partially longitudinal front view showing a state in which a plurality of buffer blocks are fitted and connected.
12A is a schematic perspective view showing a cylindrical buffer block configuration in which a hollow buffer block is provided with a fitting for insertion and a recess for fitting, FIG. 12B is a schematic perspective view showing a case of connection, and FIG. ) Indicates a triangular prism-shaped buffer blockYouA front view and (d) are explanatory drawings in the case of fitting two triangular prism-shaped buffer blocks.
13A is a perspective view showing another form of the hollow buffer block, FIG. 13B is a perspective view showing a case where the hollow buffer block is not provided, and FIG. 13C and FIG. Explanatory drawing of a case, (e) And (f) is a vertical front view which shows the block for a buffer to another form.
FIG. 14 is a partially longitudinal front view showing a rock fall prevention wall having a buffer mechanism according to a fourth embodiment of the present invention.
15A is a plan view of a part of FIG. 14, and FIG. 15B is a vertical side view showing a mounting portion of a wood chip storage box.
FIGS. 16A and 16B are schematic perspective views showing a state in which a plurality of buffer blocks are stored in a storage box. FIGS.
17A is a cross-sectional view shown in FIG. 16, and FIG. 17B is a cross-sectional plan view showing how the storage box is attached.
18A is a partially longitudinal side view showing a rock fall prevention wall having a buffer mechanism according to a fifth embodiment of the present invention, and FIG. 18B is an enlarged view of the vicinity of the lower portion of the storage box.
19A is a cross-sectional plan view showing a mounting state of a storage box, and FIG. 19B is a cross-sectional view showing an example of a cross-sectional form of a corrugated steel sheet for dispersing impact loads arranged on the surface side of a plurality of buffer blocks. (C) is explanatory drawing when a falling rock collides with the storage box which accommodated the block for a buffer.
FIG. 20 is a partially longitudinal side view showing a rock fall prevention wall having a buffer mechanism according to a sixth embodiment of the present invention.
21A is a plan view of a part of FIG. 20, and FIG. 21B is an enlarged vertical side view showing a mounting portion of a wood chip storage box.
FIGS. 22 (a) and 22 (b) are schematic perspective views showing a form in the case where an impact load distribution support plate is provided.
[Explanation of symbols]
1 foundation or retaining wall
2 main pillars
3 holding pillar
4 Anchor bolt
5 Bolts and nuts
6 Anchor bolt
7 Support frame material
8 Mold material
8a Front flange
9 Bolts and nuts
10 Rock fall prevention wall
11 Wood chips
12 bags
13 cushioning material
13a Block for buffer
14 Mounting bracket
15 Rock fall prevention wall with buffer mechanism
16 strings
17 Convex part for engagement
18 Wood chip storage box
19 Bottom plate
20 Side plate
21 Side plate
22 Wood chip storage box body
23 Top plate
24 Side plate
25 Side plate
26 Box-shaped lid
27 Flange for mounting
28 Lid mounting piece
29 Long hole
30 volts
31 Buffer layer
32 volts
33 U-shaped bolt
34 Steel L-shaped members
35 U Bolt insertion cylinder
36 U-bolt insertion cylinder
37 Rockfall
38 strips
39 Eyebolt
40 turnbuckle
41 Middle part
42 Wood chip layer
43 Fittings for insertion
44 Recess for fitting
45 Hollow elastic body
46 nuts
47 Groove
48 Supporting part
49 Support plate for impact load distribution
50 steep slopes
51 Adhesive sealant
52 Hollow part
53 Reinforcing member

Claims (5)

A buffer block having a hollow cross-section formed by molding or compression molding a wood chip, wherein the buffer block reinforced with a reinforcing member on the inner surface side of the buffer block is provided on the surface that receives the rock fall of the rock fall prevention wall body A rock fall prevention wall with a shock absorbing mechanism. The mold material of the front face of the rock fall prevention wall body, rockfall prevention wall having a buffer mechanism according to claim 1, wherein the attached through strip body cushioning blocks of hollow cross section in the hollow portion.   A rockfall having a shock-absorbing mechanism characterized in that a shock-absorbing wall of the rock-fall prevention wall body is attached with a shock-absorbing material formed by inserting a plurality of shock-absorbing blocks formed by molding or compression-molding wood chips inside the storage box. Prevention wall. The rock fall prevention wall having a buffer mechanism according to claim 3 , wherein the storage box is made of a steel plate. The rock fall prevention wall having a buffer mechanism according to claim 3 or 4 , wherein the buffer block is attached to a box body or a lid of the storage box.

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