JP2010090698A - Check dam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a semi-permeable type check dam preventing the deformation of a bridge and having a high reliability. <P>SOLUTION: A fixed base material 19a and the fixed base material 19b are installed along a slit 16 to each of the upstream-side slope 18a and upstream-side slope 18b of the check dam 15. The bridge 21a to the bridge 21h are arranged while crossing the slit 16 in the horizontal direction, and both ends of these bridges are mounted detachably to the fixed base material 19a and the fixed base material 19b. Each of the bridges 21 is formed in a structure embedding the bridges 21 in elastic bodies under the state loosening chains made of steel. Mutually adjacent bridges are connected by connecting materials 22 at the centers of the bridges 21 in each of the bridges 21. Nets 24 setting the lengths of one sides smaller than the adjacent spaces of the bridges 21 are installed detachably to the fixed base material 19a and the fixed base material 19b at the rears of the bridges 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sabo dam, and more particularly to a transflective sabo dam having slits provided in the vertical direction.

  FIG. 14 is a front view showing the external shape seen from the upstream side of a conventional semi-transmissive sabo dam disclosed in JP-A-11-50435 and the like, and FIG. 15 is an XV-XV shown in FIG. It is sectional drawing of a line.

  With reference to these drawings, a slit portion 16 extending in the vertical direction is formed in the central portion of the sabo dam 15. A steel base 61a and a steel base 61b are attached to the upstream side slope 18a and the upstream side slope 18b along both sides of the slit part 16, and a plurality of slits 16 are disposed across the slit part 16 in the horizontal direction. The horizontal beam 63 is attached.

  16 is an enlarged view of the “Y” portion shown in FIG. 14, and FIG. 17 is a cross-sectional view taken along the line XVII-XVII shown in FIG.

  Referring to these drawings, a steel base 61a made of H-shaped steel is fixed to the upstream slope 18a along the slit portion 16 via anchor bolts 65a and 65b. A round pipe-shaped cross beam 63 is attached to the outer surface of the steel base 61a via a U-shaped nut 64a and a U-shaped nut 64b in a direction orthogonal to the axial direction of the steel base 61a.

  As described above, by attaching the plurality of cross beams 63 so as to cross the upstream side of the slit portion 16, it is possible to prevent a large amount of debris from flowing out to the downstream side during a flood or the like.

  In the conventional sabo dam as described above, the cross beams are formed of steel, and these are attached to the upstream slope of the dam and directly fixed to the rigid base material. Therefore, since the impact of the debris flow collision is directly received by the cross beam, when the impact energy exceeding the yield strength is received, the cross beam is deformed. As a result, the blocking function of the debris flow of the cross beam is lowered, and it is necessary to replace it.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a translucent sabo dam that is less likely to deform a horizontal beam and has high reliability.

  In order to achieve the above object, the invention according to claim 1 is a sabo dam in which a slit is formed in the vertical direction, and at least one dam that is attached so as to cross the slit in the horizontal direction on the upstream slope. The transverse beam is composed of a rigid material and a buffer material, and the impact absorption energy of the transverse beam is larger than the impact absorption energy of the rigid material alone.

  If comprised in this way, the tolerance of the impact force from the debris flow for a horizontal beam will deform | transform increases.

  According to a second aspect of the invention, in the configuration of the first aspect of the invention, the cross beam includes a steel chain and an elastic body in which the steel chain is embedded in a loosened state.

  If comprised in this way, a steel chain will be extended with an elastic body first with the applied tensile force, and a tensile force will be transmitted to a steel chain after that. When the tensile force disappears, the cross beam returns to its original shape by the action of the elastic body. The surface of the steel chain is covered with an elastic body.

  According to a third aspect of the present invention, in the configuration of the first aspect of the present invention, the cross beam is connected to the steel chain and both ends of the steel chain, and has a tensile absorption energy larger than the tensile absorption energy of the steel chain. And a telescopic shock absorbing mechanism. When the tensile force disappears, the cross beam returns to its original shape by the action of the buffer mechanism.

  If comprised in this way, a part of energy of the applied tensile force will first be absorbed by the buffer mechanism, and the subsequent tensile force will be transmitted to the steel chain.

  According to a fourth aspect of the present invention, in the configuration of the invention according to any one of the first to third aspects, a plurality of horizontal beams are provided in the vertical direction, and a rigid connecting material that connects each of the adjacent horizontal beams is further provided. It is provided.

  If comprised in this way, the space | interval of horizontal beams will be kept constant irrespective of a movement of a horizontal beam.

  According to a fifth aspect of the present invention, in the configuration of the second aspect of the present invention, a concave portion is formed in the central portion of the elastic body, and a plurality of lateral beams are installed in the vertical direction, and each of the adjacent lateral beams is interposed between the concave portions. And a rigid connecting material that is detachably connected.

  If comprised in this way, there is no possibility that a connection material will shift | deviate with respect to the axial direction of a cross beam, and attachment to a cross beam and removal will become easy.

  A sixth aspect of the present invention is the structure according to any one of the first to fifth aspects, wherein the rigidity is attached at a position downstream of the transverse beam and has a passage area smaller than an allowable passage area of debris by the transverse beam. It is further provided with a net made of material.

  If comprised in this way, even if the debris which passed the cross beam has a certain size or more, the outflow is prevented by the net.

  A seventh aspect of the present invention is the rigidity of the invention according to any one of the first to fifth aspects, wherein the rigid section is attached at a position upstream of the transverse beam and has a passage area smaller than an allowable passage area of the debris by the transverse beam. It is further provided with a net made of material.

  If comprised in this way, even if it is a debris which passes through a cross beam, the thing of a size more than fixed is prevented from flowing out by a net. The load applied to the net is supported by the cross beam.

  The invention according to claim 8 is the configuration of the invention according to any one of claims 1 to 7, further comprising a cover member that covers a mounting portion of the transverse beam to the upstream slope.

  If comprised in this way, a debris flow will not collide directly with the attachment part of a cross beam.

  As described above, according to the first aspect of the present invention, since the allowable amount of impact force from the debris flow increases, the horizontal beam is not easily deformed, and the impact load from the debris flow to the dam itself is mitigated.

  In addition to the effect of the invention of claim 1, the invention described in claim 2 is such that the chain and the elastic body are first extended by the tensile force, and then the tensile force is transmitted to the steel chain. Energy is definitely increased compared to the structure of a single steel chain. When the tensile force disappears, the cross beam returns to its original shape, so that the function of preventing the next debris flow can be maintained in its original state. Further, since the surface of the steel chain is covered with an elastic body, the steel chain is protected from wear due to contact with the debris flow, and the durability of the cross beam is improved.

  In the invention of claim 3, in addition to the effect of the invention of claim 1, a part of the energy of the tensile force is first absorbed by the buffer mechanism and then transmitted to the steel chain. Energy is definitely increased compared to the structure of a single steel chain. When the tensile force disappears, the cross beam returns to its original shape, so that the function of preventing the next debris flow can be maintained in its original state.

  In addition to the effect of the invention according to any one of claims 1 to 3, the invention according to claim 4 maintains a constant spacing between the cross beams, so that the debris outflow prevention effect is stable and reliable. Will improve.

  According to the fifth aspect of the invention, in addition to the effect of the second aspect of the invention, there is no possibility that the connecting material is displaced, so that the effect of maintaining the distance between the cross beams is further stabilized. In addition, work efficiency is improved because it is easy to perform processing when the horizontal beams are individually replaced.

  In addition to the effects of the invention according to any one of claims 1 to 5, the invention according to claim 6 prevents the outflow of debris having a certain size or more even when passing through the cross beam. The debris flow outflow can be controlled effectively.

  In addition to the effects of the invention according to any one of claims 1 to 5, the invention according to claim 7 prevents the outflow of earth and stones having a certain size or more even when passing through a cross beam. Therefore, the outflow of debris flow can be controlled effectively. Further, since the load applied to the net is supported by the cross beam, the strength of the net can be set low, so that an effective sabo dam is obtained.

  In addition to the effects of the invention according to any one of claims 1 to 7, the invention according to claim 8 prevents the debris flow from directly colliding with the mounting portion of the cross beam, so that the mounting portion is protected from damage and the cross beam. The reliability at the time of replacement and installation is improved.

It is the schematic block diagram which looked at the structure of the semi-permeable type sabo dam by 1st Embodiment of this invention from the upstream. It is sectional drawing of the II-II line shown in FIG. FIG. 2 is an enlarged view of an “X” portion shown in FIG. 1. It is sectional drawing of the IV-IV line shown in FIG. It is the perspective view of the partially broken state which showed schematic structure of the cross beam shown in FIG. It is the graph which showed the related characteristic of the displacement amount and load of a horizontal beam shown in FIG. 5 with the prior art example. It is the enlarged view seen from the VII-VII line shown in FIG. It is sectional drawing which showed schematic structure of the buffer mechanism in the edge part of the cross beam used for the sabo dam by 2nd Embodiment of this invention. It is the schematic block diagram which looked at the structure of the semi-permeable type sabo dam by 3rd Embodiment of this invention from the upstream. FIG. 10 is an enlarged view of a portion “A” shown in FIG. 9. It is sectional drawing of the XI-XI line shown in FIG. FIG. 10 is an enlarged view of a “B” portion shown in FIG. 9. It is sectional drawing of the XIII-XIII line shown in FIG. It is the figure which looked at schematic structure of the conventional semi-permeable type sabo dam from the upstream side. It is sectional drawing of the XV-XV line shown in FIG. FIG. 15 is an enlarged view of a “Y” portion shown in FIG. 14. It is sectional drawing of the XVII-XVII line shown in FIG.

  FIG. 1 is a front view of an outer appearance of a transflective sabo dam according to a first embodiment of the present invention as viewed from the upstream side, and FIG. 2 is a cross-sectional view taken along line II-II shown in FIG. .

  With reference to these drawings, a slit portion 16 extending in the vertical direction is formed on the slope of the central portion of the sabo dam 15. A pair of a fixed base material 19a and a fixed base material 19b extending in the vertical direction are attached to the upstream slope 18a and the upstream slope 18b on both sides of the slit portion 16, respectively. The cross beams 21a to 21h are attached so as to span the fixed base material 19a and the fixed base material 19b so as to straddle the slit portion 16 in the horizontal direction. The interval between adjacent cross beams 21 is preferably about 0.3 to 1.0 times, or about 0.5 to 1.0 times the average particle size of the earth and stone expected to be generated. In this embodiment, the distance between the cross beams 21 is constant, but the distance near the upper part and the distance near the lower part may be different as necessary. For example, the vicinity of the upper part may be about 0.5 times the average particle diameter, and the vicinity of the lowermost part may be about 1.0 times the average particle diameter.

  Each of the horizontal beams 21a to 21h is connected by a connecting material 22 made of a steel chain or a wire so as to connect adjacent ones at the center thereof. Further, a net 24 made of steel wire covers a portion corresponding to the mounting surface of the cross beam 21a to the cross beam 21h between the formation surface of the cross beam 21a to the cross beam 21h and the upstream side slope surface 18a and the upstream side slope surface 18b. Are attached to each of the fixed substrate 19a and the fixed substrate 19b.

  3 is an enlarged view of the “X” portion shown in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV shown in FIG. 3, and FIG. 5 is a schematic configuration of the cross beam shown in FIG. FIG.

  First, referring to FIG. 5, the cross beam 21 is constituted by a steel chain 37 in a loosened state and an elastic body 38 such as rubber formed so as to be embedded therein. Therefore, the elastic body 38 is also filled in the gap 39 between the chains. As a result, the cross beam 21 becomes a structure having a tensile absorption energy larger than that of the chain 37 alone that does not include the elastic body 38. Moreover, since the surface of the chain 37 is covered with the elastic body 38, the debris flow does not directly collide with the chain 37, so that the chain 37 is not worn and the durability is improved.

  FIG. 6 is a graph showing the relationship between the amount of displacement and the load for explaining the phenomenon of increase in the tensile absorption energy of the cross beam.

  Referring to the figure, the amount of displacement is taken on the horizontal axis, and the load is taken on the vertical axis. F on the vertical axis indicates the yield strength of the chain due to tension. In the structure having only the steel chain, the amount of change when the yield strength is reached is L1. Therefore, in the structure of a horizontal beam with a single steel chain, the area of the shaded portion of the solid line corresponds to the tensile absorption energy.

  On the other hand, in the structure in which the elastic body and the steel chain are combined in the present embodiment, when the tensile force is applied, the steel chain is configured to be loose at the initial stage. The chain will first extend. When a tensile force is further applied thereafter, the chain becomes tensioned and reaches the yield strength. That is, in the horizontal beam structure in the present embodiment, the tensile absorption energy corresponds to the area of the hatched portion in the broken line. Therefore, in the cross beam of the present embodiment, the tensile absorption energy is remarkably increased as compared with the structure having only the steel chain. In the sabo dam shown in FIG. 1, the transverse beam having the tensile absorption energy acts to increase the impact absorption energy of the debris flow.

  Returning to FIG. 3, the fixing base material 19 a is similarly fixed in the longitudinal direction with respect to the fixing member 31 and the flat fixing member 31 attached to the upstream slope 18 a via the anchor bolt 32 a and the anchor bolt 32 b. A flat plate-like vertical member 29 that extends and is installed so as to stand in a vertical direction with respect to the upper surface of the fixing member 31, and a flat plate-like cover that is attached to the upper surface of the vertical member 29 and is mounted substantially parallel to the fixing member 31 The member 34 is constituted by a large number of ribs 35 attached at a predetermined interval between the fixing member 31 and the cover member 34.

  A pair of attachment pieces 27a and attachment pieces 27b are attached at a predetermined interval so as to span between the fixing member 31 and the cover member 34 between the ribs 35a and 35b. A detachable pin 28 can be attached to the attachment piece 27a and the attachment piece 27b so as to penetrate therethrough. As a result, the ring 25 at the end of the cross beam 21b is detachably attached to the attachment piece 27a and the attachment piece 27b via the pin 28, that is, to the fixed base member 19a.

  As described above, a net 24 made of steel wire is laid in the space between the cross beam 21b and the upstream slope 18a, and the net 24 is detachable from the fixed base 19a via a connection portion (not shown). Installed. The net 24 is formed in a lattice shape, but the size of one side of the lattice is set smaller than the interval between the adjacent cross beams 21. As a result, even if it is a debris that has passed through the cross beam 21, if it is larger than a predetermined size, the net 24 prevents the outflow downstream.

  FIG. 7 is an enlarged view seen from the VII-VII line shown in FIG.

  Referring to the figure, the elastic body 38 is not formed in the central portion of the cross beam 21a, and a part of the ring 41 is exposed. That is, a concave portion 42 is formed in the central portion of the cross beam 21a with respect to the elastic body 38. A shackle 44 is detachably attached to the exposed ring 41. The shackle 44 is attached with a part of the ring of the connecting member 22 made of a steel chain. In this way, as shown in FIG. 1, the connecting member 22 is fixed at the center of each of the cross beams 21a to 21h. As a result, the interval between the adjacent cross beams 21 is held substantially constant by the connecting member 22.

  Further, since the connecting member 22 is connected to the ring 41 at the concave portion 42 of each central portion of the cross beam 21 via the shackle 44, there is no possibility that the connecting member 22 is displaced from the axial direction of the cross beam 21. Therefore, even when a debris flow collides with the cross beam 21, the spacing between the adjacent cross beams 21 is maintained in a substantially constant state, so that the debris flow blocking effect is stabilized.

  FIG. 8 is a cross-sectional view showing a schematic configuration at the end of a cross beam used in a sabo dam according to a second embodiment of the present invention.

  First, referring to (1) of FIG. 8, a buffer mechanism 45 is provided at the end of the cross beam 21, and the buffer mechanism 45 includes a first member 46 to which the ring 25 on the fixed base side is connected, and a center side. The second member 48 to which the chain 47 is connected and the buffer member 49 housed in the first member 46 are mainly configured.

  The first member 46 includes a cylindrical cylinder 50 whose both ends are opened, a pressing member 51 that is screwed and fixed to one end of the cylinder 50, and a screw that is screwed to the other end of the cylinder 50. The fixing member 52 is rarely fixed.

  The second member 48 includes a rod 53, a nut 54 fixed to one end portion of the rod 53, and a connecting ring 55 fixed to the other end portion of the rod 53. The rod 53 passes through the opening of the pressing member 51 of the first member 46 in the axial direction of the cylinder 50 and is inserted into the cylinder 50. The nut 54 can move slidably in the axial direction of the cylinder 50 in the cylinder 50 according to the movement of the rod 53.

  The buffer member 49 is attached so as to be sandwiched between the pressing member 51 and the nut 54 inside the cylinder 50. The buffer member 49 is formed of a material capable of absorbing energy by compression, such as rubber, spring, oil, metal, and the like, and is attached so as to surround the rod 53.

  Further, the first member 46 and the second member 48 are connected by a pair of shear pins 56a and shear pins 56b. The shear pin 56 a and the shear pin 56 b pass through an opening 57 a and the opening 57 b formed in the cylinder 50 in a direction orthogonal to the axial direction of the cylinder 50, and each end is screwed into the nut 54. As a result, the movement of the nut 54 in the axial direction of the cylinder 50 is restricted. For this reason, even if a tensile force is applied to both ends of the cross beam 21 at the time of attachment, all the tension is transmitted as a shearing force to the shear pin 56a and the shear pin 56b, so that the buffer member 49 is not compressed at this stage.

  Next, referring to (2) of FIG. 8, when a load of a certain level or more is applied to the chain 47 due to the impact of the debris flow, the shear pin 56a and the shear pin 56b are broken by the shearing force applied to the shear pin 56a and the shear pin 56b. Thereby, the movement blocking state of the nut 54 is released, and the nut 54 can move to the pressing member 51 side.

  8 (3), when the nut 54 moves in the direction approaching the pressing member 51 according to the tension from the chain 47, the buffer member 49 is compressed by the nut 54 and the pressing member 51. Accordingly, the buffer member 49 generates elastic energy due to compression, and can absorb energy due to the impact applied to the chain 47. That is, even in the structure of the cross beam according to this embodiment, the tensile absorption energy increases as compared with the structure without the buffer mechanism.

  FIG. 9 is a front view of the transflective sabo dam according to the third embodiment of the present invention as seen from the upstream side, and FIG. 10 is an enlarged view of the “A” portion shown in FIG. 11 is a cross-sectional view taken along line XI-XI shown in FIG. 10, FIG. 12 is an enlarged view of a portion “B” shown in FIG. 9, and FIG. 13 is a cross-sectional view taken along line XIII-XIII shown in FIG. It is sectional drawing.

  With reference to these drawings, the sabo dam according to this embodiment has a point in which the fixed base material supporting both ends of the cross beams 21a to 21g is divided, and both ends and the center portion of the cross beams 21a to 21g, respectively. The point of being covered with the independent end covers 74 and 75 and the center cover 76 and the point that the connecting material 22 for connecting the centers of the cross beams is mainly composed of wires is the first embodiment. Is very different from

  Specifically, the cross beams 21a and 21b are supported by the fixed base materials 71a and 72a, respectively. Similarly, the cross beams 21c and 21d are supported by the fixed base materials 71b and 72b, and the cross beams 21e and 21f are fixed base materials 71c and 72c. The horizontal beams 21g and 21h are supported by the fixed base materials 71d and 72d, respectively. As a result, when either of the fixed base materials 71 and 72 is damaged, it is only necessary to replace the damaged fixed base material while leaving the anchor bolts 80, so that the structure according to the previous embodiment is compared. Exchange becomes easy.

  The detailed structure of the end cover 74 is shown in FIGS. Specifically, a steel pipe 78 having a diameter that allows the horizontal beam 21b to be inserted is attached to the outer surface of the fixed base 71a via fixed plates 79a, 79b, and 79c with both ends open. A through hole is formed in the steel pipe 78 so that the connecting pin 82 is detachable in the vertical direction. When attaching the cross beam 21b, the end of the cross beam 21b is inserted into the steel pipe 78 with the connecting pin 82 removed. And the connection pin 82 is attached to the steel pipe 78 so that it may penetrate in the ring 81 exposed at the edge part of the cross beam 21b. As a result, the end of the cross beam 21b is completely accommodated in the steel pipe 78, and the connecting portion with the fixed base 71a can be reliably protected from damage caused by earth and sand. Further, even when the horizontal beam 21b is damaged, the replacement is very easy only by detaching the connecting pin 82.

  The detailed structure of the center cover 76 is shown in FIGS. Specifically, the portion of the ring 41 exposed through the recess 42 at the center of the cross beam 21 b is surrounded by a steel material 84 having a U-shaped cross section including the recess 42. The vertical surface of the steel material 84 is disposed so as to face the upstream side of the sabo dam. A wire 85b is attached so as to penetrate the steel material 84 up and down, and both ends thereof are bound to form clamps 87b and 87c. As a result, there is no possibility that the steel material 84 is almost displaced vertically from the wire 85b. The clamp 87b is connected via a ring 86a to a wire 85a having a clamp 87a formed at the lower end thereof. On the other hand, the clamp 87c is connected via a ring 86b to a wire 85c having a clamp 87d formed at the upper end thereof. As described above, in this embodiment, since the connecting member 22 that connects the cross beams 21 at the center is mainly composed of wires, the connecting member 22 is reduced in weight and easy to handle.

  In addition, a through hole is formed in each of the pair of upper and lower horizontal members of the steel member 84 so that the connecting pin 82 is detachable in the vertical direction. When attaching the central portion of the cross beam 21b, the central portion of the cross beam 21b is inserted into the steel member 84 from the outside with the connecting pin 88 removed. And the connection pin 88 is attached to the steel material 84 so that it may penetrate in the ring 41 exposed in the recessed part 42 of the center of the cross beam 21b. Thereby, the central part of the horizontal beam 21b is connected to the upper and lower horizontal beams. And the center part of the cross beam 21b will be in the state accommodated completely in the inside of the steel material 84, and it will become possible to protect the recessed part 42 where the ring 41 is exposed from the damage by earth and sand etc. reliably. Further, even when the cross beam 21 is damaged, the removal of the central portion thereof becomes extremely easy only by detaching the connecting pin 88.

  As described above, according to this embodiment, both end portions and the central portion of the horizontal beam are completely covered, and the horizontal beam can be easily attached and detached.

  In each of the above-described embodiments, a plurality of transverse beams are provided. However, from the viewpoint of preventing debris flow, it is effective if at least one transverse beam is attached.

  Further, in each of the above embodiments, the cross beam is configured by combining a rigid material and a buffer material, but even if it is configured around a stretchable material without using a rigid material, it is compared with a material that does not expand or contract. Shock absorption energy increases.

  Further, in each of the above-described embodiments, the buffer material is an elastic body or a buffer mechanism, but it goes without saying that the same effect can be obtained even if another buffer material is used.

  Further, in each of the above embodiments, the net is attached to the downstream side of the cross beam, but this is not always necessary.

  Further, in each of the above-described embodiments, the cover member is formed at the both ends mounting portion of the cross beam, but this is not always necessary.

  Furthermore, in the second embodiment, the cross beam is a combination of a steel chain and a buffer mechanism, but the same effect can be achieved by a combination of a steel wire and a buffer mechanism.

  Further, in each of the above embodiments, the configuration of the cross beam is different, but the configuration of the cross beam according to the first embodiment may be used for the steel chain portion of the second embodiment. good.

  Furthermore, in the first embodiment, the connecting material is attached to the ring exposed in the central recess of the cross beam, but the connecting material may be attached to the recess itself without being attached to the ring. Or you may comprise so that a connection material may be attached to a cross beam without a recessed part.

  Furthermore, in each of the above embodiments, one connecting member is attached. However, if a plurality of connecting members are attached according to the length of the cross beam, the function of maintaining the distance between the cross beams becomes more stable. .

  Furthermore, in each of the above-described embodiments, the net is attached to the downstream side of the cross beam. However, instead of this, the net may be attached to the upstream side of the cross beam. In this case, even if the stone is smaller than the distance between the horizontal beams, it is supplemented by the net if it is larger than a predetermined size. And since the net itself is supported by the lateral beam on the downstream side, the strength of the net against the load of debris or the like applied to the net can be set lower than that installed on the downstream side.

DESCRIPTION OF SYMBOLS 15 ... Sabo dam 16 ... Slit part 18 ... Upstream slope 21 ... Cross beam 22 ... Connecting material 24 ... Net 34 ... Cover member 37 ... Chain 38 ... Elastic body 42 ... Recess 45 ... Buffer mechanism 74, 75 ... End cover 76 ... Center cover 85 ... Wire In addition, the same code | symbol in each figure shows the same or equivalent part.

Claims (8)

A sabo dam with slits formed vertically,
On the upstream slope, comprising at least one transverse beam mounted transversely across the slit;
The transverse beam is composed of a rigid material and a buffer material, and the impact absorption energy of the transverse beam is larger than the impact absorption energy of the rigid material alone, and is a sabo dam. The transverse beam is
A steel chain,
The sabo dam according to claim 1, further comprising an elastic body that embeds the steel chain in a loosened state. The transverse beam is
A steel chain,
The sabo dam according to claim 1, further comprising a telescopic shock absorbing mechanism connected to both ends of the steel chain and having a tensile absorption energy larger than that of the steel chain. A plurality of the horizontal beams are installed in the vertical direction,
The sabo dam according to any one of claims 1 to 3, further comprising a rigid connecting member that connects each of the adjacent transverse beams. A concave portion is formed in the central portion of the elastic body, and a plurality of the horizontal beams are installed in the vertical direction,
The sabo dam according to claim 2, further comprising a rigid connecting member that detachably connects each of the adjacent transverse beams via the recess. The sabo dam according to any one of claims 1 to 5, further comprising a net made of a rigid material attached at a position downstream of the transverse beam and having a passage area smaller than an allowable passage area of the earth and stone by the transverse beam. . The sabo dam according to any one of claims 1 to 5, further comprising a net made of a rigid material attached at a position downstream of the transverse beam and having a passage area smaller than an allowable passage area of the earth and stone by the transverse beam. . The sabo dam in any one of Claims 1-7 further provided with the cover member which covers the attachment part to the said upstream slope of the said cross beam.

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