JPWO2018069970A1 - Transmission type capture structure - Google Patents

Abstract

To provide a transmission type capture structure capable of reliably preventing scouring of a valley bed 80 and erosion of a river shore 81 while preventing destruction of a sleeve net 40 during a flood. A transmission-type capturing structure including a water passage portion net and a sleeve portion net, wherein the mesh of the sleeve net is smaller than the mesh of the water passage portion net. [Selection] Figure 1

Description

  The present invention relates to a transmission type capture structure that can be used for sediment capture work such as debris flow and driftwood, capture work for driftwood in rivers, slope fall prevention work, avalanche prevention work and the like.

There is known a transmission type capture structure using capture nets formed in a grid shape by intersecting steel ropes such as wire ropes in the longitudinal and lateral directions (Patent Document 1).
As a mounting method of the capture net, it is known to fix the periphery of the capture net to a mountain bank or a mountain floor using an anchor (Patent Document 2), or to attach both sides of the capture net to a pillar erected on the mountain floor. (Patent Document 3).
As shown in FIG. 14, not only the rectangular water-permeable section net 91 is installed between the pillars 90, 90, but also the sleeve net 93 is additionally disposed between the pillar 90 and the mountain bank 92, and the whole valley can be It is also known to arrange the nets 91 and 93 in the cross section (Patent Document 3).
The sleeve net 93 is a net produced by crossing the vertical ropes and the horizontal ropes in a similar manner to that of the water-passing net 91, and connecting the crossing portions, and the sleeves via the plurality of anchors 94 The oblique side of the net 93 is fixed to the bank 92.

Japanese Patent Application Laid-Open No. 50-31604 Unexamined-Japanese-Patent No. 2000-257049 (FIG. 1) Unexamined-Japanese-Patent No. 2002-339338 (FIG. 1)

Conventional transmissive capture structures have the following problems.
<1> The transmission type capture structure shown in FIG. 14 is a transmission type capture structure when erosion of the bank 92 proceeds as shown by the two-dot chain line at the time of a large scale flood when the bank 92 is left bare. It loses the sabo function as a thing.
<2> Although it is possible to cover the bank 92 with an artificial revetment structure such as a concrete structure to prevent erosion, it is difficult to carry in the revetment material and construction equipment to the site in the mountain area, The cost of revetment is extremely expensive.
<3> When both ends of each horizontal rope constituting the water-permeable section net 91 are attached between the columns 90, 90 and transversely stretched, it takes a lot of labor and time for the tensioning work of each horizontal rope, and the capture net The work efficiency of the installation work is low.
The conventional capture net used in the <4> transmission type capture structure is that the intersection of the capture net is displaced at the time of impact and the mesh is easily deformed by expansion and contraction, and the transmission of the impact load accompanying the shift of the capture net intersection. The loss is large, the diffusion range of the impact force is narrow, and the stress is concentrated on the horizontal rope located in the reception range, so that it is easily broken.

The present invention has been made in view of the above points, and an object of the present invention is to provide the following transmission type capture structure.
<1> In the event of a flood, while preventing the destruction of the sleeve net, securely prevent scouring of the mountain bed and erosion of the mountain bank.
<2> There is no need to protect the surface of the bank with an artificial revetment structure, and economically protect the bank.
<3> Improve the shock absorbing performance by enhancing the dispersion performance of the impact force by the water passing portion net and maximizing the strength of the capture net.

According to the present invention, there is provided a water-permeable net which is laid between a plurality of rigid structures erected at intervals on a mountain floor, and a sleeve which is laid between a rigid structure at an end and a mountain bank. A transmission type capture structure comprising a part net, the part being composed of a sediment deposited on the upstream face of the sleeve part net between a mountain bank upstream of the sleeve part net and the sleeve part net The mesh of the sleeve net is in a smaller dimensional relationship than the mesh of the weft net so that the protective buffer layer is formed in a state.
In another embodiment of the present invention, the mesh of the sleeve net is formed in the range of 10 to 95% of the mesh of the water-permeable portion net.
In another embodiment of the present invention, the watering net can not slide on both ends of a net body provided with a plurality of end attachment ropes and a rope material having a length twice or more the span of the rigid structure. A rear loop member fixed to a loop shape and having a double rope structure, the terminal attachment rope having an end ring at an end, and extending across the valley of the rigid structure Is anchored to the end ring of the end attachment rope to connect the capture net and the back loop member, and the impact force acting on the net body is dispersed to the back loop member through the end attachment rope A continuum of end attachment rope and back loop material is bridged between the circumferential surfaces of the plurality of rigid structures for transmission.
In another aspect of the present invention, the net body is disposed at the intersection of a plurality of single cords having end rings at both ends, and the net main body is capable of pin connection with the single rings A plurality of relay connectors are combined in a net shape.
In another embodiment of the present invention, a plurality of laterally arranged single cords constitute a continuous transverse cord through a relay connector, and a loop structure is exhibited by the transverse cord, a terminal attachment rope, and a capture net. .
In another aspect of the present invention, the terminal attachment rope is constituted by the single cord connected to the left and right sides of the net body via a relay connector.
In another aspect of the present invention, a plurality of stoppers are provided on the circumferential surface of the rigid structure along the longitudinal direction of the rigid structure, and the end ring of the end attachment rope is covered with the stoppers. The movable range of is restricted to a fixed range by the stopper.
In another aspect of the present invention, the relay connector includes a plurality of detachable anchoring pins, and is pivotally connected to the end ring of the single cord via the anchoring pins.
In another aspect of the present invention, the relay connector includes a pair of veneers disposed opposite to each other, and a plurality of anchoring pins which are detachably inserted between the veneers.
In another embodiment of the present invention, the sleeve net is constituted by a frame rope and an inscribed net fixed to the frame rope.
In another embodiment of the present invention, the top end of the sleeve net is formed higher than the top end of the water-passing net.

According to the present invention, any one of the following effects can be obtained.
<1> By making the mesh of the sleeve net smaller than the mesh of the through-hole net, it normally functions as a complete transmission structure and at the time of a flood, the sleeve net is impermeable to the structure While, it is possible to make only the water-passing net function as a transmission type structure.
<2> It becomes possible to form a protective buffer layer on the upstream side of the sleeve net by utilizing the dimensional difference between the mesh of the sleeve net and the water-permeable portion net.
Since the protective buffer layer is naturally formed by sediment of the runoff, it is not necessary to protect the surface of the bank with an artificial revetment structure, and the bank can be economically protected.
<3> Since the protective buffer layer functions as a sleeve net and a protective wall of the mountain bank, it is possible to prevent the scouring of the mountain bed and the erosion of the mountain bank surely while preventing the destruction of the sleeve net.
When a watering net is constituted by the <4> net body and the back loop material, the end ring of the terminal attachment rope extended on both sides of the net body functions as a moving pulley, so the rope for the back loop material A watering net can be stretched between a plurality of rigid structures with a simple operation of repeatedly pulling the material with a small force.

A model diagram of a transmission type capture structure viewed from the valley side according to the first embodiment Top view of transmission type capture structure A perspective view of a transmission capture structure with a part omitted Exploded view of the net body An enlarged front view of the main body of the net with a part omitted Perspective view of single cord Exploded view of relay connector Partially enlarged cross-sectional view of the connection portion of the single cord and the relay connector The perspective view of the terminal attachment rope and the mooring part of the back loop material It is explanatory drawing of the attachment part of a sleeve net and a rigid structure, (A) is a partial perspective view in the upper attachment of a sleeve net and a rigid structure, (B) is a lower attachment of a sleeve net and a rigid structure. Partial perspective view of the part Top view of transmission capture structure to illustrate the erosion control function A partial front view of a capture net according to Embodiment 2 A partial front view of another capture net according to Embodiment 2 Model diagram of conventional transmission type capture structure

Example 1
<1> Outline of Transmission Type Capture Structure A transmission type capture structure 10 according to the present embodiment will be described with reference to FIGS.
The transmission type capture structure 10 is constructed of a plurality of rigid structure bodies 30, 30 erected at intervals on a mountain bed 80, a water-permeable section net 20, each rigid structure body 30 and a mountain bank 81. And sleeve nets 40 and 40 which are laid between them.
The mesh size of the sleeve net 40 is smaller than the mesh size of the water-passing net 20, and the top end height of the sleeve net 40 is higher than the top end of the water-passing net 20.

<2> Water-passing-part net The water-passing-part net 20 is a single rope made of metal, fiber or resin, a single chain, a single chain, a strip steel plate, or a combination of two or more thereof. Both the left and right sides of the net are fixedly supported on the rigid structural body 30 including a known net-like substance knitted into a mesh of shape.

The water-permeable portion net 20 of this example will be described with reference to FIGS.
The water-permeable section net 20 of this example has a belt-like net body 25 having a plurality of terminal attachment ropes 26 extended to the left and right sides of the net and a rigid structure of the net body 25 via the plurality of terminal attachment ropes 26. And a back loop 60 attached between the bodies 30,30.
The net body 25 is disposed on the valley side of the rigid structures 30, 30, and the back loop member 60 is disposed on the valley side of the rigid structures 30, 30.

  In this example, the net body 25 and the terminal attachment rope 26 have a plurality of single cords 22 having endless end rings 21 and 21 at both ends, and a plurality of relay connectors that can be connected with the ends of the plurality of single cords 22. A case of combining 50 and 50 will be described.

<2.1> Net main body The net main body 25 of the present example will be described. The net main body 25 arranges a plurality of single cords 22 in the column direction and the row direction, It is a net-like object assembled.
A plurality of single cords 22 arranged in the lateral direction are located on the same line through the relay connector 50 and constitute a continuous transverse cord 23.
A plurality of single cords 22 arranged in the longitudinal direction are located on the same line through the relay connector 50 and constitute a continuous longitudinal cord 24.
The plurality of transverse cords 23 and the plurality of longitudinal cords 24 intersect and are assembled in a lattice shape.
The net body 25 defines a square mesh A surrounded by four single cords 22 arranged in the vertical and horizontal directions and four relay connectors 50.

<2.1.1> Single Cable The single cable 22 is a dual purpose rope material constituting the net body 25 and the terminal attachment rope 26.
Referring to FIG. 6, the single cord 22 is made of one or a plurality of twisted steel or fiber ropes and has endless end rings 21 at both ends.
As the net body 25, a high strength steel rope material is used for the single cords 22, both ends of the steel rope material are folded back and subjected to eye splice or compression processing to form the end ring 21.

<2.1.2> Relay connector The relay connector 50 is a connector for detachably connecting the plurality of single cords 22.
The relay connector 50 illustrated in FIGS. 7 and 8 will be described. The relay connector 50 includes a pair of veneers 51, 51 disposed opposite to each other, and a plurality of anchoring pins inserted between the veneers 51, 51. And 52.
At the periphery of each veneer 31 are formed a plurality of pin holes 53 through which the mooring pins 52 can be inserted.
In this example, four pin holes 53 are formed at equal intervals, but the number of pin holes 53 can be selected as appropriate.
The mooring pin 52 can use a connecting pin in addition to the illustrated bolt and nut.
The mooring pin 52 can be connected by a pin structure between the single cord 22 and the relay connector 50 by penetrating the end ring 21 together with the pair of veneers 51 and 51, and the single cord 22 is of the relay connector 50. It is pivotable about the mooring pin 52.

<2.2> Assembly Example of Capture Net As shown in FIGS. 4 and 5, a plurality of single cords 22 are arranged in the vertical and horizontal directions, and a relay connection member 50 is interposed at the intersection of the single cords 22 to form a strip net. Assemble the main body 25.
The relay connector 50 is interposed at the intersection of the single cords 22 in order to eliminate the shift movement of the intersection points of the single cords 22. By eliminating the deviation of the intersection points of the single cords 22, the relay connector 50 is provided. In addition to enabling load transfer between the plurality of single cords 22 connected, load transfer loss is also reduced.

One ends of a plurality of single ropes 22 are connected to the left and right sides of the net body 25 via the relay connector 50, and the terminal attachment ropes 26 are assembled in multiple stages.
In addition to the fact that the net body 25 can be assembled entirely in a factory, it is also possible to divide the divided body of the net body 25 into parts and carry it into the site and assemble it on the site.

<2.3> Terminal Attachment Rope The terminal attachment rope 26 is a rope material made of single cords 22 provided on the left and right sides of the net body 25 and functions to attach the net body 25 to the rigid structure 30.
The plurality of terminal attachment ropes 26 are located on the extension of the horizontal ropes 23 that constitute the net body 25 via the relay connector 50.
The connection structure between the terminal attachment rope 26 and the net body 25 is the same as the connection structure using the relay connection tool 50 shown in FIG.

<2.4> Back Loop Material Referring to FIGS. 2 and 3, the back loop material 60 is a rope for bridging the net body 25 between the rigid structures 30, 30 via the end attachment ropes 26. And has a length of twice or more the span of the rigid structures 30, 30.
The back loop material 60 is inserted by inserting one rope material across the end rings 21 of the left and right end attachment ropes 26 and can not slide the overlapping portion near the end of the rope material with the fixing tool 61 And fixed in a loop shape.

<2.4.1> Relationship Between Net Body and Back Loop Material The horizontal cords 23 constituting the net main body 25 are located on the same line through the plurality of single cords 22 arranged in the lateral direction and the relay connector 50 The end attachment ropes 26 extend at both ends thereof.
Since the back loop material 60 is stretched between the end attachment ropes 26, 26, the loop structure having a continuity throughout the cross rope 23, the end attachment rope 26, and the water-through portion net 20 is exhibited.

<2.4.2> The reason why the end attachment rope and the back loop material are combined. The rear loop material 60 is moored to the end rings 21 and 21 of the end attachment ropes 26 and 26 extended from the left and right sides of the water passing portion net 20. The end rings 21 on the free end side of each end attachment rope 26 function as a moving pulley, and the back loop member 60 is pulled in the contraction direction with a small force, so that adjacent rigid structures 30, In order to stretch the water-passing portion net 20 between 30 and to disperse the impact load on the net body 25 and the back loop member 60.

<3> Rigid Structure Body> The rigid structure body 30 is a highly rigid columnar structure that supports the water-passing portion net 20, and in this example, the case where the rigid structure body 30 is a column exhibiting a circular cross section will be described.

<3.1> Material Example of Rigid Structure Body The rigid structure body 30 is a highly rigid column body such as, for example, a steel pipe, a concrete-filled steel pipe, or a concrete column, and is erected on a mountain bed at a predetermined interval.

<3.2> Stopper As shown in FIG. 9 in an enlarged manner, a plurality of stops 31 are provided on the outer periphery of the rigid structure 30 in a protruding manner in accordance with the mounting height of the end attachment rope 26. The stopper 31 covers the end ring 21 on the free end side of each terminal attachment rope 26 and functions to restrict the movable range of the end ring 21 (the movement amount of the terminal attachment rope 26) to a certain range.

  In the present embodiment, the stopper 31 is formed to project from the outermost side surface of the rigid structure 30. However, the projection position of the stopper 31 is the front side of the rigid structure 30 (the installation of the net body 25). It may be in the section from the side) to the back side of the rigid structure 30 (the installation side of the back loop material 60).

<4> Sleeve Net The sleeve net 40 is a net-like material having a mesh smaller than the water-permeable net 20.
In this example, a frame rope 41 surrounded by a sleeve net 40 in a substantially triangular shape or a substantially trapezoidal shape and a plurality of rope materials in the frame rope 41 intersect in the longitudinal and transverse directions, and the intersections are fixed to form a grid The case where it comprises by the inscribed net 42 is demonstrated.
The inscribed net 42 is integrally fixed to the frame rope 41.

Referring to FIG. 10, an example of attachment of the sleeve net 40 and the rigid structure 30 will be described. Brackets 32 respectively project from upper and lower portions of the side surface of the rigid structure 30. A frame rope 41 at a side is attached to the upper and lower portions of the rigid structural body 30 via a locking pin 33.
The oblique side of the sleeve net 40 is fixed to the bank 81 via one or more anchors 82 shown in FIG.

In the present invention, the mesh of the sleeve net 40 is set to be smaller than the mesh of the water-permeable net 20 in the present invention.
The sleeve net 40 has a small mesh size, which allows the sleeve net 40 to actively capture debris such as debris flow while permitting water permeability of the water-passing net 20 at the time of a large-scale flood occurrence. This is to form a protective buffer layer 70 which is a deposit of falling material on the upstream side of the sleeve net 40.
In other words, the capture performance of the sleeve net 40 is enhanced compared to the water-permeable portion net 20, and the sleeve net 40 side is clogged in advance.

The mesh size of the water-permeable portion net 20 is set to 1.5 to 2.0, which is the largest diameter of the giant shell.
The mesh size of the sleeve net 40 is in the range of 10 to 95% of the mesh size of the water-permeable portion net 20, preferably 50 cm or less.
If the mesh size of the sleeve net 40 with respect to the water-passing net 20 is smaller than 10%, the impact load becomes huge at the occurrence of a large scale flood and the sleeve net 40 becomes easily broken, and if it exceeds 95%, the sleeve net It becomes difficult to form the protective buffer layer 70 on the upstream side of 40.

[Construction method of transmission type capture structure]
Next, a method of installing the transmission capture structure 10 will be described.

<1> Establishment of Rigid Structure As shown in FIGS. 1 and 2, the rigid structures 30, 30 are erected on mountain beds or the like at predetermined intervals.
The net main body 25 is carried into the valley mountain side of the rigid structures 30, 30, and the rope material for the back loop material 60 is carried into the valley valleys of the rigid structures 30, 30.

<2> Mounting of the water-permeable portion net As shown in FIG. 2, each of the members extended from both sides of the net body 25 while winding a part of the rope material for the back loop member 60 around the peripheral surface of the rigid structure 30 The end ring 21 at the free end of the terminal attachment rope 26 is inserted and folded back.
At this time, the end ring 21 of each of the terminal attachment ropes 26 is mounted on the corresponding stopper 31 (FIG. 9).
In this state, both ends of the rope material for the back loop material 60 folded back to the back side of the rigid structure 30 are tightened in the contraction direction. The pair of left and right end attachment ropes 26 wound around the peripheral surface of the rigid structure 30 is pulled through the back surface loop member 60, and the net body 25 is horizontally extended on the front side of the rigid structures 30, 30.
The back loop member 60 fixes the overlapping portion of the rope member in a non-slidable manner by the fixing tool 61.

  Since the end ring 21 on the free end side of each end attachment rope 26 functions as a moving pulley when attaching the water-passenger net 20, the adjacent rigid structures can be simply worked by only pulling the back loop member 60 with a small force. The main body 25 can be stretched between 30, 30. Therefore, the installation of the net body 25 does not require a pulling equipment such as a large chain block, so that the assembling workability of the water-permeable section net 20 can be improved and the construction cost and the construction period can be significantly reduced.

<3> Attachment of sleeve net A transmission type capture structure 10 by attaching the sleeve net 40 between the rigid structure 30 and the mountain bank 81 in parallel with or independently of the attachment of the water-passing net 20. Is completed.

[Sabo function of capture net]
Next, the erosion control function of the transmission capture structure 10 will be described.

<1> Small to medium scale floods In the case of small to medium scale floods, floodwaters and mud water of a size that does not cause disaster will flow down through the lower mesh of the water-passing part net 20 and sleeve part net 40.

<2> At the time of large-scale flood The erosion control function at the time of occurrence of a large-scale debris flow will be described with reference to FIG.
Flow debris such as debris flow and driftwood flows downward from the bottom of the drawing.
Since the mesh of the sleeve net 40 is smaller than the mesh of the water-permeable part net 20, the sleeve net 40 is clogged and its transmission function is reduced.
The water-permeable network 20 which has a large size and is hard to cause clogging maintains a good permeation function.

<2.1> Formation of Protective Buffer Layer When the sleeve net 40 is clogged, the amount of trapped and accumulated sediment increases, and the protection of impermeability by the sediment deposited on the valley mountain side of the sleeve net 40 The buffer layer 70 is constructed.
The protective buffer layer 70 increases the amount of deposition in the form of a "state" toward the valley mountain side of the sleeve net 40 while protecting the banks 81, 81 of the both sides located on the valley mountain side of the sleeve net 40 .
The height and width dimensions of the protective buffer layer 70 are greatest on the side closer to the sleeve net 40 and gradually decrease with distance from the sleeve net 40.
With the passage of time, the protective buffer layer 70 is clogged with fine sand and the like in the interstices of the stalagmites, and is transformed into a hard, heavy-weight soil mass structure.
The protective buffer layer 70 transformed into a soil mass structure exhibits the same function as a gravity type concrete dam.

<2.2> Prevention of erosion of the mountain bank Since the protective buffer layers 70 and 70 function as a protective wall, not only the sleeve net 40 is not destroyed but also scouring and erosion of the mountain banks 81 and 81 are ensured. Can be prevented.
Since the protective buffer layers 70, 70 are naturally formed by sediments of the runoff, even if the riverbanks 81, 81 are bare land, it is necessary to protect their surfaces with artificial revetment structures. Rather, it can economically protect the banks 81, 81.
The skirts of the protective buffer layers 70 extend not only to the mountain bed 80 upstream of the sleeve net 40 but also to the mountain bed 80 upstream of the water-passing net 20. Therefore, scouring of the entire mountain bed 80 on the upstream side of the transmission type capture structure 10 can be effectively prevented.

<2.3> Absorption of Impact Force A protective buffer layer 70 is located on the upstream side of the sleeve net 40 to protect the sleeve net 40.
When the subsequent flow toward the sleeve net 40 strikes the side of the protective buffer layer 70, the buffer action of the protective buffer layer 70 attenuates the falling energy.

<2.4> Induction of Falling Material The subsequent falling material striking the protective buffer layer 70 flows down along the sloped side of the protective buffer layer 70 and is directed toward the water network portion 20.
Furthermore, since the top end of the water-passing portion net 20 is in a lower positional relationship than the top end of the sleeve portion net 40, the falling material is guided toward the water-passing portion net 20 by this height difference.

The erosion control net by the <2.5> water-passing part net The water-passing part net 20 can catch drifting substances such as driftwood and debris that are larger than the mesh, and can drain outflowing substances such as debris smaller than the mesh that can be passed through. .

<3> Other Effects of the Water-through Portion Net The water-through portion net 20 of the present example exerts the following effects in addition to the above.

<3.1> Suppression of expansion deformation of mesh In the conventional capture net, the intersection of the ropes is displaced and the mesh is expanded and deformed, but in the net body 25, the intersection of each single cord 22 is fixed so as not to slide. As a result, the mesh A does not expand and deform, and it is possible to ensure the trapping function of the falling material without inadvertently discharging the excessive falling material.

<3.2> Diffusion of impact force In the conventional capture net, the point of diffusion of impact force is narrow due to the shift movement of the intersection points of steel ropes, and stress is concentrated on the horizontal rope located in the range of impact and it is easy to break It was a thing.
On the other hand, in the net main body 25, the cross points of the single cords 22 do not shift, and the single link 22 can freely rotate at the cross points of the single cords 22 via the relay connector 50.
Therefore, since the impact load can be dispersed and transmitted to all the single cords 22 connected to the relay connector 50, the transmission loss can be extremely reduced, and the impact force acting on a part of the water-passing portion net 20 can be reduced. It can be transmitted to the entire net, and the strength of the water-permeable portion net 20 can be maximized.
For example, when an impact force acts on the central portion of the net body 25 shown in FIG. 5, the impact force is serially transmitted to each single cord 22 located around the central portion of the net body 25 as shown by the arrows. Go.

<3.3> Transmission Route of Impact Force In this example, the impact force acting on the water-permeable portion net 20 is supported by the net body 25, the back loop member 60 and the rigid structure 30 which will be described in detail below.

<3.3.1> Shock absorbing action of impact force by net body and back loop member Net body 25 and back loop member 60 can slide in a state of continuity between a pair of rigid structures 30, 30 It is wrapped.
When a debris such as a debris flow collides with the net body 25, its impact force is transmitted to the valley-side back loop material 60 via the end attachment ropes 26 and 30.
The tensile force of the back loop material 60 is increased by the net body 25 bending deformation to the valley side.
The net body 25 and the back loop member 60 do not have a shock absorber, but it is possible to buffer the impact force by the extension of the rope material.

When a friction slide type shock absorbing device is interposed in a part of the transmission type capture structure, a continuous shock absorbing action can not be expected from the shock absorbing device because impact force such as debris flow repeatedly acts.
On the other hand, in the transmission type capture structure 10, the impact force can be buffered by elastic deformation by the net body 25 and expansion and contraction of the back loop material 60.

Since the back loop member 60 has a double rope structure, the burden of impact load by the back loop member 60 is reduced.
Therefore, the back loop material 60 can be coped with a low strength small diameter rope material, and the fixture 61 can be coped with a small one.

<3.3.2> Transmission of impact force by stopper When a huge impact force acts on the through-hole net 20, the end attachment rope 26 wound around the rigid structure 30 slightly slides due to the extension of the back loop member 60 Do.
When the tip end portion of the end ring 21 of the terminal attachment rope 26 shown in FIG. 9 abuts against the stopper 31 with the sliding of the terminal attachment rope 26, the sliding of the terminal attachment rope 26 is restricted.
Therefore, the impact force acting on the net body 25 is transmitted as a bending force and a rotational force to the rigid structure 30 through the stopper 31.
The impact force finally applied to the net body 25 is supported by the bending resistance and the rotation resistance of the rigid structure 30.
The load on the back loop member 60 is reduced by the addition of the rigid structural body 30 to the impact supporting member.
Even if the back loop member 60 is broken, the net body 25 and the rigid structural body 30 can continue to support the impact force, so the safety of the transmission type capture structure 10 is greatly enhanced compared to the prior art.

<4> Removal of Captured Falling Material The debris such as debris flow and driftwood captured and deposited on the water-passing net 20 and sleeve net 40 of the transmission-type capture structure 10 is removed by a known means.
Since the net body 25 and the back loop member 60 constituting the water penetrable part net 20 are restored to the original shape before the impact due to the self-restoring force when the drifting object is removed and the external force is eliminated, the back loop member 60 is tightened. There is no need to fix it.

<5> Repair of Capture Net When a part of the net body 25 of the water-passing portion net 20 is damaged, only the single cord 22 that has been damaged is removed from the relay connector 50 without replacing the entire net body 25. It can be replaced with a new one, and if the relay connector 50 is damaged, it can be easily replaced and repaired as well.

Example 2
The net main body 25 constituting the other water-permeable part net 20 will be described with reference to FIGS.
In the previous embodiment, although a plurality of single cords 22 are arranged to intersect in the longitudinal and lateral directions, the relay main body 50 is configured by inserting the relay connector 50 at the intersection points. May be diagonally crossed.
FIG. 12 shows a mode in which a rhombic mesh A is formed by crossing a plurality of single cords 22 diagonally except for the upper and lower sides and the left and right sides of the net body 25.
FIG. 13 shows a form in which a triangular mesh A is formed by crossing a plurality of laterally arranged single cords 22 and a single cord 22 arranged in a cross diagonal direction.
The net main body 25 shown in FIG. 13 may be rotated 90 degrees.
Further, the configuration of the plurality of net bodies 25 shown in FIGS. 5, 12 and 13 may be combined in a hierarchical manner to assemble the water-permeable portion net 20.
Although illustration is omitted, in any form, a plurality of terminal attachment ropes 26 are attached to the left and right sides of the net main body 25, and the net main body 25 and the back loop material 60 are continuous through the terminal attachment ropes 26. The connection is made to have the same structure as the first embodiment described above.

In this example, by changing the number of connections of the single cords 22 connected to each relay connector 50, any geometric shape (triangle, square, etc.) excluding the circular shape of the mesh A in the net body 25 is obtained. , Rhombus, polygon, etc.) to change the strength of the net body 25.
Further, by combining the plurality of single cords 22 and the plurality of relay connectors 50, it is possible to assemble the outline shape of the net body 25 into any shape.

  Furthermore, it is also possible to apply the known net | network which has the grid | lattice-like net | network which crossed the continuous rope and fixed the crossing part with clips etc. as the net | network main body 25. FIG.

10 ----- transmission capturing structure 20 ----- water through unit net 21 ----- Tanwa 22 ----- Tansaku 23 ----- Yokosaku 24 .... · Longitudinal cord 25 ··· Net main body 26 · · · Terminal attachment rope 30 · · · · Rigid structure (post)
31 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 52 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ... 82 ······ Anchor

According to the present invention, there is provided a water-permeable net which is laid between a plurality of rigid structures erected at intervals on a mountain floor, and a sleeve which is laid between a rigid structure at an end and a mountain bank. A transmission type capture structure comprising a part net, the part being composed of a sediment deposited on the upstream face of the sleeve part net between a mountain bank upstream of the sleeve part net and the sleeve part net The mesh of the sleeve net is in a smaller dimensional relationship than the mesh of the weft net so that the protective buffer layer is formed in a state.
In another embodiment of the present invention, the mesh of the sleeve net is formed in the range of 10 to 95% of the mesh of the water-permeable portion net.
In another form of the present invention, the water passed through the net double rope formed in a plurality of the net body provided with the terminal mounting rope, before sliding incapable fixedly loop both ends of km-loop material A rear loop member having a structure, the end attachment rope having an end ring, and the rear loop member extending across the valley of the rigid structure is anchored to the end ring of the end attachment rope End connection rope and the back surface so that the capture net and the back surface loop material are connected, and the impact force acting on the net body can be dispersed and transmitted to the back surface loop material via the end connection rope. A continuum with a loop material is bridged between the circumferential surfaces of the plurality of rigid structures.
In another aspect of the present invention, the net body is disposed at the intersection of a plurality of single cords having end rings at both ends, and the net main body is capable of pin connection with the single rings A plurality of relay connectors are combined in a net shape.
In another embodiment of the present invention, a plurality of laterally arranged single cords constitute a continuous transverse cord through a relay connector, and a loop structure is exhibited by the transverse cord, a terminal attachment rope, and a capture net. .
In another aspect of the present invention, the terminal attachment rope is constituted by the single cord connected to the left and right sides of the net body via a relay connector.
In another aspect of the present invention, a plurality of stoppers are provided on the circumferential surface of the rigid structure along the longitudinal direction of the rigid structure, and the end ring of the end attachment rope is covered with the stoppers. The movable range of is restricted to a fixed range by the stopper.
In another aspect of the present invention, the relay connector includes a plurality of detachable anchoring pins, and is pivotally connected to the end ring of the single cord via the anchoring pins.
In another aspect of the present invention, the relay connector includes a pair of veneers disposed opposite to each other, and a plurality of anchoring pins which are detachably inserted between the veneers.
In another embodiment of the present invention, the sleeve net is constituted by a frame rope and an inscribed net fixed to the frame rope.
In another embodiment of the present invention, the top end of the sleeve net is formed higher than the top end of the water-passing net.

Claims (11)

A water-permeable net, which is laid across a plurality of rigid structures erected at intervals on a mountain bed, and a sleeve net, which is laid laterally between the rigid structure at the end and the bank. A transmissive capture structure, comprising
The sleeve so that a protective buffer layer composed of a drifting material deposited between a mountain bank upstream of the sleeve net and the sleeve net is formed in a state shape on the upstream surface of the sleeve net. Characterized in that the mesh of the partial net is smaller than the mesh of the permeable net,
Transmission type capture structure.   The transmission capture structure according to claim 1, wherein the mesh of the sleeve net is formed in the range of 10 to 95% of the mesh of the water-permeable part net. The watering net includes a net body provided with a plurality of terminal attachment ropes;
And a back rope member of double rope structure formed in a loop shape by slidably fixing both ends of the rope material having a length of twice or more the span of the rigid structure.
The terminal attachment rope has end rings at the end,
A back loop member extending across the valley of the rigid structure is anchored to an end ring of the end attachment rope to connect between the capture net and the back loop member;
The continuum of the end attachment rope and the back loop material is a circumference of the plurality of rigid structures so that the impact force acting on the net body can be dispersed and transmitted to the back loop material via the end attachment rope. A transmission capture structure according to claim 1 or 2, characterized in that it is bridged between the faces.   The net body includes a plurality of single cords having end rings at both ends, and a plurality of relay couplers disposed at intersections of the single cords and capable of pin-type connection with the end rings of the single cords. The transmissive capture structure according to claim 3, characterized in that it is combined in a net shape.   A plurality of single cords arranged in a lateral direction constitute a continuous transverse cord through a relay connector, and a loop structure is exhibited by the transverse cord, the terminal attachment rope, and the catching net. Transmission type capture structure as described.   The transmission type capture structure according to claim 3, characterized in that the terminal attachment rope is constituted by the single cords connected to the left and right sides of the net body via a relay connector.   A plurality of stoppers are provided protruding along the longitudinal direction of the rigid structure on the circumferential surface of the rigid structure, and the movable range of the end ring of the terminal attachment rope outside the stopper is fixed by the stoppers within a certain range The transmission type capture structure according to claim 3 or 6, characterized in that   The relay connector according to any one of claims 3 to 6, characterized in that the relay connector comprises a plurality of detachable mooring pins, and is pivotally connected to the end ring of the single cord via the mooring pins. The capture net according to one item.   The relay joint according to any one of claims 3 to 6, further comprising: a pair of veneers disposed opposite to each other; and a plurality of anchoring pins which can be inserted and removed between the veneers. The capture net according to one item.   The capture net according to claim 1 or 2, wherein the sleeve net comprises a frame rope and an inscribed net fixed to the frame rope. The transmission type capture structure according to claim 1 or 2, wherein the top end height of the sleeve net is formed higher than the top end of the water-passing part net.

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