KR102455207B1 - Pipe for culvert type ecological passage and culvert type ecological passage assembly using the same for amphibians - Google Patents

Abstract

The present invention can provide moisture into the culvert-type ecological passage over a long period of time, and can always maintain a constant interval between the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube, so that the moisture-containing material is not compressed, so that the moisture content of the moisture-containing material is reduced It relates to a culvert-type ecological passageway that can prevent it. The culvert-type ecological passage pipe is an inner tube whose both ends are open and has an ecological passage for amphibians formed along the inside, and a plurality of first through holes for communicating the inner and outer peripheral surfaces are formed at intervals, surrounding the outer peripheral surface of the inner tube and a plurality of It has a configuration including a moisture-containing material for providing moisture to the ecological passage through the first through-hole of and an external tube surrounding the moisture-containing material.

Description

Pipe for culvert type ecological passage and culvert type ecological passage assembly using the same for amphibians}

The present invention relates to an eco-passage pipe and improvement of an eco-passage assembly using the same, and more particularly, to a culvert-type eco-passage pipe and an improvement in an eco-passage assembly for amphibians using the same.

As roads and railroads are built due to industrialization and national land development, the problems of habitat loss, habitat loss, and area reduction of wild animals occur. However, there is a problem that the safety of the driver is also threatened.

To solve this problem, ecological pathways are being installed as a way to connect the cut off habitats. In particular, in the case of amphibians, the spawning site and habitat are different, and in the case of reptiles, the hibernation site and the vegetarian site are different.

The ecological passageway for amphibians is installed across the lower part of the road and filled with soil, fallen leaves, and soil containing fallen leaves inside the case with an empty passageway formed inside, and the soil at both ends of the passageway leaks out of the passageway. It is disclosed in the Registered Utility Model Gazette of Registration No. 20-0420371 (name of design: eco-path for eco-friendly small animals, designer: Sung-taek Kang) to have a partition part to prevent it from happening.

This invention of Kang Sung-taek requires frequent maintenance and repair because there is a high risk of loss of filling parts such as soil, fallen leaves, and soil containing fallen leaves over time. In addition, as time passes after installation, there is a high possibility that the charging part such as soil is inclined to one side in the direction in which water flows, and in this case, there is a problem that one side of the ecological passage is easily dried.

In addition, it comprises a passage structure penetrating across the lower part of the roadbed of the road, a small end provided in the form of a step on one side of the floor of the passage structure, and a moving rod installed on the wall of the passage structure, and the small end of the passage structure is not installed Publication No. 10-2011-, in order to provide a passageway through which various types of animals, from insects to large predators, can safely move across the road, by additionally providing a water channel at the bottom of the side. It is disclosed in the Patent Publication No. 0109375 (Title of the invention: tunnel-type animal passage, inventor: Lee Sang-don et al. 1).

The invention of Lee Sang-don and others is to provide passages for various animals, so it is not suitable for installation where an amphibian ecological passage suitable for only amphibians or small reptiles should be installed.

In addition, it is installed inside the concrete fume pipe, and water barriers are formed at both ends of the water storage part to prevent the inflow of water from escaping. Although disclosed in the Registered Utility Model Gazette, there is a disadvantage that it can be installed only where there is a concrete Hume pipe.

An object of the present invention is to provide a culvert-type ecological passage assembly for amphibians that can provide moisture uniformly over the entire section and a tube for the culvert-type ecological passage for the same.

Another object of the present invention is to provide a culvert-type eco-passage assembly for amphibians capable of providing moisture over a long period of time and a tube for the culvert-type eco-passage therefor.

Another object of the present invention is to provide a culvert-type eco-passage assembly for amphibians that is easy to make as well as light and easy to move and install to a necessary place and a tube for a culvert-type eco-passage therefor.

Culvert-type ecological passage tube according to the present invention is provided with an ecological passage for amphibians formed along the inside with both ends open and a plurality of first through-holes communicating the inner and outer peripheral surfaces are formed at intervals; a moisture-containing material surrounding the outer circumferential surface of the inner tube and providing moisture to the ecological passage through the plurality of first through-holes; and an external tube surrounding the moisture-containing material.

It is preferable that a plurality of second through-holes are formed at intervals to communicate the inner and outer circumferential surfaces of the outer tube body and provide moisture supplied from the outside to the moisture-containing material.

It is preferable that the inner tube body and the outer tube body are circular tubes made of plastic.

It is more preferable that the inner tube body and the outer tube body are circular tubes made of polyethylene.

In some cases, the inner tube body and the outer tube body may be a circular tube made of PVC.

It is preferable that the said moisture-containing material is a nonwoven fabric.

Preferably, the inner tube body and the outer tube body are coupled to each other so as to maintain a predetermined distance between the inner tube body and the outer tube body through a plurality of gap maintaining mechanisms including bolts and nuts.

The bolt of the gap maintaining mechanism is installed through the inner tube body, the moisture-containing material, and the outer tube body, and the nut is a first nut coupled to the bolt protruding from the inside of the inner tube body or the outer tube body , A pair of second nuts for maintaining a gap that is coupled to the bolt between the outer circumferential surface of the inner tube body and the inner circumferential surface of the outer tube body so that the outer circumferential surface of the inner tube body maintains a certain distance with the inner circumferential surface of the outer tube body can be configured.

In some cases, the bolt of the gap maintaining mechanism is formed in a cross section smaller than the spacing maintaining part and the spacing maintaining part disposed between the outer surface of the inner tube body and the inner surface of the outer tube body, and extending outward from both ends of the space maintaining part, respectively. The nut may include a pair of nuts respectively coupled to the male screw portion protruding into the inner tube body and the male screw portion protruding outside the outer tube body.

It is preferable that the first through hole has a diameter of 10-20 mm and is formed with an interval of 50-70 mm.

It is more preferable that the first through hole has a diameter of 15 mm and is formed with an interval of 60 mm.

The second through-hole may have a diameter of 10-20 mm and may be formed with a distance greater than or equal to that of the first through-hole.

The culvert-type eco-passage assembly for amphibians according to the present invention includes at least two tubes for a culvert-type eco-passage according to any one of claims 1 to 12; And it is configured to include a connecting mechanism for connecting the adjacent culvert-type ecological passage pipe.

The connecting mechanism includes an arc-shaped slide plate; a rubber band disposed along the inner circumferential surface of the slide plate and coupled to the outer circumferential surface of the outer tube body of the tube for the culvert-type ecological passage; a pair of tightening bars attached to the arc-shaped slide plate at intervals and provided with fastening holes formed in the transverse direction of the outer tube body and disposed in the longitudinal direction of the outer tube body; and a fastening mechanism coupled to the fastening hole to narrow an interval between the pair of tightening bars.

A female spiral may be formed on an inner surface of at least one fastening hole of the pair of tightening bars, and the fastening mechanism may be a bolt coupled to the female spiral.

In some cases, the fastening mechanism may include a bolt having a portion protruding out of the fastening hole through the fastening hole of the pair of tightening bars and a nut coupled to the bolt protruding out of the fastening hole. can

According to the present invention, moisture can be provided into the culvert-type ecological passage over a long period of time by installing a moisture-retaining material made of a nonwoven fabric between the inner tube body and the outer tube body in which the through hole is formed.

According to the present invention, since the inner tube body and the outer tube body are coupled through the gap maintaining mechanism according to the present invention, it is possible to always maintain a constant distance between the outer circumferential surface of the inner tube body and the inner circumferential surface of the outer tube body, so that the moisture-containing material is not compressed. It is possible to prevent the moisture content from lowering.

According to the present invention, it is possible to provide moisture into the ecological passage even through rainwater that permeates the ground, so that it is possible to provide moisture to the ecological passage for a long period of time even in a poor environment.

According to the present invention, it is possible to provide a culvert-type ecological passage assembly for light amphibians by making the inner tube body and the outer tube body of plastic such as polyethylene, and it is easy to make. It is also convenient to install the culvert-type ecological passage assembly for amphibians by moving it to the required place.

1 is a perspective view of a pipe for a culvert-type ecological passage according to the present invention;
Fig. 2 is a longitudinal sectional view taken along II of Fig. 1;
3 is a cross-sectional view taken along JJ of FIG. 1 ;
4 is a partially broken perspective view of the pipe for the culvert-type ecological passage of FIG. 1;
5 is a side view of the inner tube;
6 is a side view of the exterior tube;
7 and 8 are views each showing examples of the spacing mechanism,
9 is a side view showing another example of the gap maintaining mechanism;
10 is an exploded perspective view of a culvert-type eco-passage assembly for amphibians according to the present invention;
11 is an assembled perspective view of the culvert-type ecopath assembly for the FIG. 10 amphibians;
12 is an enlarged perspective view of the connecting mechanism;
13 is an enlarged cross-sectional view of the connecting mechanism according to KK of FIG. 11;
14 is a view showing a modified example of the connecting mechanism.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a pipe for a culvert-type ecological passage according to the present invention, FIG. 2 is a longitudinal cross-sectional view taken along II-I of FIG. 1, FIG. 3 is a cross-sectional view taken along J-J of FIG. Partially broken perspective view of the pipe for passage, Figure 5 is a side view of the inner tube, Figure 6 is a side view of the outer tube.

1 to 6, the culvert type ecological passage pipe 100 according to the present invention has an inner tube body 110 and an outer tube body 130 for accommodating the inner tube body 110 therein. And the moisture-containing material 150 is installed between the outer peripheral surface of the inner tube body 110 and the inner peripheral surface of the outer tube body (130).

As shown, the inner tube body 110 has a circular tube shape with both ends open. An ecological passage (EP) for amphibians is formed along the inside of the inner tube body 110 . Preferably, the inner diameter of the inner tube body 110 is about 500 mm, and the thickness of the material of the inner tube body 110 is about 20 mm so as to provide an ecological passage (EP) of an amphibian of an appropriate size.

In addition, the inner tube body 110 has a plurality of first through-holes 112 arranged at intervals while communicating the inner peripheral surface and the outer peripheral surface. The first through hole 112 serves to continuously provide the moisture contained in the moisture-containing material 150 to the ecological passage (EP) inside the inner tube body (110). The plurality of first through holes 112 are preferably formed at regular intervals. It is suitable to form the first through hole 112 in a size of about 10 to 20 mm in diameter so that the moisture contained in the moisture-containing material 150 can be smoothly supplied over the entire section. In this case, the distance between the adjacent first through-holes 112 is preferably 50 to 70 mm. Most preferably, the diameter of the first through hole 112 is 15 mm, and the distance between the adjacent first through holes 112 is about 60 mm.

The inner tube body 110 is preferably made of plastic. As the plastic, polyethylene is good, and in some cases, one made of PVC (Poly Vinyl Chloride) may be used. In the case of using the inner tube body 110 made of plastic as described above, the weight of the tube 100 for the culvert-type ecological passage can be reduced, and it is easy to make.

The outer tube body 130 accommodates the inner tube body 110 inside, but is formed in a circular tube shape having an inner diameter larger than the outer diameter of the inner tube body 110 so that the inner circumferential surface is disposed at a predetermined distance from the outer circumferential surface of the inner tube body 110. . This external pipe 130 is to surround and protect the moisture-containing material 150 and to provide rainwater permeated into the ground as the moisture-containing material 150 . It is good that the outer tube body 130 is also made of plastic such as polyethylene, and in some cases, one made of PVC may be used. As the outer tube body 130, it is suitable that the inner diameter is about 640 mm, the outer diameter is 680 mm, and the thickness of the material of the outer tube body 130 is about 20 mm. In this case, a hollow cylindrical space with a thickness of 50 mm is formed between the outer circumferential surface of the inner tube body 110 and the inner circumferential surface of the outer tube body 130 , and the moisture-containing material 150 is filled therein. By adjusting the sizes of the inner tube body 110 and the outer tube body 130, the distance between the outer peripheral surface of the inner tube body 110 and the inner peripheral surface of the outer tube body 130 can be adjusted.

Second through-holes 132 are formed at regular intervals in the outer tube body 130 . The second through hole 132 is formed to communicate the inner and outer circumferential surfaces of the outer tube body 130 and is for providing moisture supplied from the outside of the outer tube body 130 to the moisture-containing material 150 therein.

The second through-hole 132 may also be formed to have the same size as or similar to the first through-hole 112 , and the distance between the neighboring second through-holes 132 is the same as or greater than the distance between the neighboring first through-holes 112 . good to do In some cases, the size of the second through-hole 132 and the distance between the neighboring second through-hole 132 may be formed differently from the size of the first through-hole 112 and the distance between the neighboring ones. For example, the distance between the adjacent second through-holes 132 may be, for example, about 70 mm to 80 mm, and the diameter of the second through-hole 132 may be about 20 mm to 25 mm. In some cases, it is also possible to make the distance between the size of the second through hole 132 and the neighboring second through hole 132 smaller than that of the first through hole 112 . In addition, the second through hole 132 may be formed such that the cross-sectional area gradually decreases from the outside to the inside, such as a frusto-conical shape, so that moisture can be absorbed well into the inside.

The moisture-containing material 150 is filled between the inner tube body 110 and the outer tube body 130 to provide moisture into the ecological passageway (EP) through the first through holes 112 while containing moisture for a long time. will be. The moisture-containing material 150 is disposed to surround the outer peripheral surface of the inner tube body (110). As the moisture-containing material 150 , a nonwoven fabric that may contain a large amount of moisture for a long period of time is suitable.

The pipe 100 for a culvert-type ecological passage according to the present invention is provided with a spacing mechanism 170 . The gap maintaining mechanism 170 serves to maintain a certain distance between the inner circumferential surface of the outer tube body 130 and the outer circumferential surface of the inner tube body 110 in order to prevent the moisture content material 150 from being compressed and a portion having a reduced moisture content is not generated. do. Accordingly, the moisture-containing material 150 may be mounted in a state capable of maintaining the largest moisture content without being excessively compressed between the inner tube body 110 and the outer tube body 130 . The spacing mechanism 170 is preferably configured with a bolt 171 and a nut 176, and about four are installed at one end. The gap maintaining mechanism 170 will be described in more detail later.

That is, when using the pipe 100 for a culvert-type ecological passage according to the present invention described with reference to FIGS. 1 to 6 , the inner tube body 110 in which a plurality of first through holes 112 are formed and a plurality of second through holes 132 ), the moisture-containing material 150 installed with a uniform thickness between the formed outer tube 130 can provide moisture into the ecological passageway (EP) for a long period of time, and as time passes after installation, the ecological passageway (EP) Even if the waterway connected to the is blocked, rainwater that has penetrated into the ground may be supplied to the moisture-containing material 150 through the plurality of second through holes 132 formed in the outer tube body 130 .

7 and 8 are views each showing examples of the spacing mechanism. It will be described with reference to FIGS. 2 and 3 together.

7 and 8, the gap maintaining mechanism 170 according to the present invention is a bolt 171 installed through the inner tube body 110, the moisture-containing material 150 and the outer tube body 130 and the bolt ( It is configured with a nut 176 coupled to 171).

The bolt 171 may be composed of a bolt 171 having a head 172 and three nuts 176 coupled to the bolt 171 as shown in FIG. 7 . In some cases, as shown in FIG. 8 , it may be composed of a headless bolt 171 and four nuts 176 coupled to the bolt 171 .

In the nuts 176 shown in FIGS. 7 and 8 , the nut 176 coupled to the bolt 171 protruding to the outside of the inner tube body 110 or the outer tube body 130 is attached to the first nut 176a. If referred to as, it is coupled to the bolt 171 between the outer circumferential surface of the inner tube body 110 and the inner circumferential surface of the outer tube body 130 so that the outer circumferential surface of the inner tube body 110 maintains a certain distance with the inner circumferential surface of the outer tube body 130 A pair of nuts 176 for maintaining a gap may be referred to as a second nut 176b.

9 is a side view showing another example of the gap maintaining mechanism. It will be described with reference to FIGS. 2 and 3 together.

As shown in FIG. 9 , in some cases, the bolt 171 of the gap maintaining mechanism 170 maintains a gap with the gap maintaining part 174 disposed between the outer surface of the inner tube body 110 and the inner surface of the outer tube body 130 . It is formed in a smaller cross-section than the portion 174 and may be configured with male screw portions 175 each extending outward from both ends of the gap maintaining portion 174 . Here, the gap maintaining unit 174 firmly supports between the outer surface of the inner tube body 110 and the inner surface of the outer tube body 130 in a state in which the moisture-containing material 150 is disposed through. In this case, the nut 176 includes a pair of nuts 176 that are respectively coupled to the male screw part 175 protruding into the inner tube body 110 and the male screw portion 175 projecting to the outside of the outer tube body 130 . do.

The rest is the same as described above.

10 is an exploded perspective view of the culvert-type eco-path assembly for amphibians according to the present invention, FIG. 11 is an assembled perspective view of the culvert-type eco-path assembly for amphibians in FIG. 10, FIG. 12 is an enlarged perspective view of the connecting mechanism, FIG. It is a partially enlarged cross-sectional view of the connecting mechanism according to K-K of 11.

10 to 13, the culvert-type ecological passage assembly 200 for amphibians according to the present invention includes at least two culvert-type ecological passage tubes 100 and a neighboring culvert-type ecological passage tube 100. It has a connecting mechanism 180 for connecting.

The culvert type eco-passage pipe 100 is the same as described above.

The connecting mechanism 180 is for connecting the ends of the adjacent two culvert-type ecological passage pipes 100 to each other, and includes an arc-shaped slide plate 181 . A rubber band 183 is provided along the inner peripheral surface of the slide plate 181 . The rubber band 183 is elastically coupled to the outer circumferential surface of the outer tube body 130 of the culvert-type ecological passage pipe 100 to prevent the culvert-type ecological passage tube 100 from falling out. As such a rubber band 183, a cylindrical one having an inner diameter to match the outer diameter of the outer tube body 130 may be used, and in some cases, a plate-shaped one whose width is slightly smaller than or equal to the length of the outer peripheral surface of the outer tube body 130 It can be used by being integrally attached to the inner circumferential surface of the slide plate 181 or rolled into a cylindrical shape while separated.

As the slide plate 181, for example, a metal plate having a thickness of about 0.8 mm may be used, and the thickness of the rubber band 183 may be about 2 mm.

As shown, the arc-shaped slide plate 181 has, preferably, a pair of tightening bars 185 disposed in the longitudinal direction of the outer tube body 130 at the opposite ends of the slide plate 181 in the transverse direction. It is attached through a connecting material 187 made of stainless steel at an interval. A fastening hole 186 is formed in the tightening bar 185 in the transverse direction of the outer tube body 130 . Preferably, a plurality of fastening holes 186 are formed.

A fastening mechanism 188 is coupled to the fastening hole 186 . The fastening mechanism 188 is for narrowing the gap between the pair of tightening bars 185 .

Referring to FIG. 13 , the fastening mechanism 188 passes through the fastening holes 186 of the pair of tightening bars 185 and protrudes out of the fastening holes 186 and the bolts B and the fastening holes 186 . ) may be configured with a nut (N) coupled to the bolt (B) protruding outward. That is, the gap between the pair of tightening bars 185 can be narrowed by coupling the bolt (B) to the nut (N), and accordingly the slide plate 181 presses the rubber band 183 to the inside, The rubber band 183 may firmly connect the two culvert-type ecological passage pipes 100 by firmly holding the end of the culvert-type ecological passage pipe 100 while being compressed on the outer circumferential surface of the outer tube body 130 . .

14 is a view showing a modified example of the connecting mechanism.

In some cases, when the female spiral 186a is formed on the inner circumferential surface of the fastening hole 186 of the pair of tightening bars 185, the fastening mechanism 188 is composed of a bolt B coupled to the female spiral 186a. can be That is, by coupling the bolt (B) to the fastening hole 186, the gap between the pair of tightening bars 185 can be narrowed, and accordingly, the slide plate 181 presses the rubber band 183 to the inside and , the rubber band 183 is squeezed on the outer circumferential surface of the outer tube body 130 while firmly holding the end of the culvert-type ecological passage pipe 100 to firmly connect the two culvert-type ecological passage pipes 100 . have.

As described above, the culvert-type ecological passage tube 100 and the culvert-type ecological passage assembly 200 for amphibians using the same may be suitably used when a dark and humid environment is preferred and it is necessary to design a sunlight blocking passage. In this case, since sunlight hardly enters the interior of the culvert-type ecological passage tube 100, plants other than moss are unsuitable to live.

The culvert-type eco-path assembly 200 for amphibians according to the present invention can provide moisture to the long-term eco-passage (EP). However, in order to maintain the wet environment in the EP for a longer period of time, it is recommended to create a small stream in the EP.

The pipe for a culvert-type ecological passage according to the present invention and a culvert-type ecological passage assembly for amphibians using the same are used for small animals, where the water level difference between the two sides is small while the road passes through the agricultural waterway or stream, the valley part or flat land filled for road construction It can be installed at the point where it is necessary to connect important habitats such as mountains, rivers, wetlands, and rice fields.

In addition, the culvert-type ecological passage tube according to the present invention and the culvert-type ecological passage assembly for amphibians using the same are most suitable as an ecological passage for amphibians or reptiles, but the ecology of medium and small animals such as medium and small mammals and birds. It can be used as a passageway. If necessary, soil, gravel, fallen leaves, etc. may be installed on the bottom of the inner pipe body.

When the pipe for a culvert-type ecological passage according to the present invention and the culvert-type ecological passage assembly for amphibians using the same serve as a drainage channel, it is possible to induce animals that like a wet environment, and for animals that do not like water, there are stairs or Additional shelves can be installed, and a bungee can be installed to prevent amphibians or reptiles from climbing onto the road.

100: tube for culvert type ecological passage 110: inner tube
112: first through hole 130: external tube body
132: second through hole 150: moisture-containing material
170: gap maintaining mechanism 171: bolt
174: gap maintaining part 175: male thread part
176: nut 180: coupling mechanism
181: slide plate 183: rubber band
185: tightening bar 188: fasteners
200: culvert-type ecopath assembly for amphibians
B: Bolt N: Nut
PE: Ecological pathway

Claims (16)

An inner tube having both ends open and having an ecological passage for amphibians formed along the inside and having a plurality of first through holes communicating the inner and outer surfaces at intervals;
a moisture-containing material surrounding the outer circumferential surface of the inner tube and providing moisture to the ecological passage through the plurality of first through-holes; and
It surrounds the moisture-containing material and includes an external tube body in which a plurality of second through-holes are formed at intervals to provide moisture supplied from the outside to the moisture-containing material,
The first through hole having a diameter of 10-20 mm is formed at a distance of 50-70 mm, and the second through hole having a diameter of 10-20 mm is formed at a distance greater than or equal to the interval of the first through hole,
The moisture-containing material becomes a non-woven fabric,
The inner tube body and the outer tube body are made of any one of plastic, polyethylene and PVC,
The inner tube body and the outer tube body are coupled to each other to maintain a certain distance through a plurality of gap maintaining mechanisms including bolts and nuts so that the moisture content material is not compressed and the moisture content of the moisture content material is prevented from being reduced. A pipe for a culvert-type ecological passage, characterized in that. delete delete delete delete delete delete The bolt of claim 1, wherein the bolt of the gap maintaining mechanism is installed through the inner tube body, the moisture-containing material, and the outer tube body, and the nut is attached to the bolt protruding from the inside of the inner tube body or the outside of the outer tube body A first nut coupled to the bolt is coupled to the bolt between the outer circumferential surface of the inner tube body and the inner circumferential surface of the outer tube body so that the outer circumferential surface of the inner tube body maintains a certain distance with the inner circumferential surface of the outer tube body. Culvert-type ecological passage pipe, characterized in that it is configured with a pair of second nuts. According to claim 1, wherein the bolt of the gap maintaining mechanism is formed with a smaller cross section than the gap maintaining portion and the gap maintaining portion disposed between the outer surface of the inner tube body and the inner surface of the outer tube body, and outward from both ends of the gap maintaining portion Each is configured with an extended male screw portion, wherein the nut is configured with a pair of nuts coupled to the male screw portion protruding to the inside of the inner tube body and the male screw portion projecting to the outside of the outer tube body Culvert-type ecological passage pipe. delete delete delete Two or more, claim 1, claim 8 and claim 9 of any one of the culvert-type eco-passage tube; and
Ecological passage assembly for amphibians, characterized in that it comprises a connecting mechanism for connecting the neighboring culvert-type ecological passage pipe. [14] The apparatus of claim 13, wherein the connecting mechanism comprises: an arc-shaped slide plate;
a rubber band disposed along the inner circumferential surface of the arc-shaped slide plate and coupled to the outer circumferential surface of the outer tube body of the culvert-type ecological passageway;
a pair of tightening bars attached to the arc-shaped slide plate at intervals and provided with fastening holes formed in the transverse direction of the outer tube body and disposed in the longitudinal direction of the outer tube body; and
Ecological passage assembly for amphibians, characterized in that it comprises a fastening mechanism coupled to the fastening hole for narrowing the gap between the pair of tightening bars. [Claim 15] The ecological passage assembly for amphibians according to claim 14, wherein a female spiral is formed on the inner surface of at least one of the fastening holes of the pair of tightening bars, and the fastening mechanism is a bolt coupled to the female spiral. . [15] The method of claim 14, wherein the fastening mechanism includes a bolt having a portion protruding out of the fastening hole through the fastening hole of the pair of tightening bars and a nut coupled to the bolt protruding out of the fastening hole. Ecological passage assembly for amphibians, characterized in that it is provided with.

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