KR20150041847A

KR20150041847A - Upper structure of eco bridge and construction method thereof

Info

Publication number: KR20150041847A
Application number: KR20130120299A
Authority: KR
Inventors: 신동기; 김충언
Original assignee: (주)삼현피에프
Priority date: 2013-10-10
Filing date: 2013-10-10
Publication date: 2015-04-20
Also published as: KR101544839B1

Abstract

The present invention relates to an upper structure of an ecological bridge, and more particularly, to an upper structure of an ecological bridge, which comprises a lower flange and a U-shaped receiving portion having a pair of abdomen portions formed upwardly at positions spaced apart from both ends of the lower flange, A first girder formed of a 'ㅛ' -shaped girder having a space therein, and having a prestress introduced therein by tensioning the tensioned material in the longitudinal direction, A second girder fabricated in the same manner and in the same manner as the first girder; The opening of the pair of abdomen of the first girder is opened and the upper end of the abdomen portion of the first girder and the upper end of the second girder are connected to each other so that the upper side of the quadrangle with the second girder which is adjacent in the transverse direction is closed A bottom plate formed; A gravel filled in a receiving space of the first girder; A passage for communicating the lower space of the bottom plate with the surface of the earth surface alternately outside; A space surrounded by the lower flange of the first girder and the abdomen and the partition wall is formed as a soil layer for vegetation so as to form a first ecological passage through which wild animals inhabited by sunny places pass, And the second ecological passage which can be moved comfortably by humans belonging to humic animals or rodents is connected to the outside of the outer soil with the passage pipe. Thus, the upper part of the bridge and the middle part of the bridge, And an animal belonging to a rodent can freely pass under an environment suitable for their respective habits.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an upper structure of an ecological bridge,

The present invention relates to a method of constructing an ecological bridge and a superstructure of an ecological bridge, and more particularly, to a method of constructing an ecological bridge by using a dark ecological passage The present invention relates to an upper structure of an ecological bridge and a method of constructing the ecological bridge so as to reduce the cost and the airbag cost of providing an ecological passage through which humans belonging to humid animals or rodents pass.

As industrialization and urbanization have progressed recently, the establishment of new roads is increasing day by day. Further, in the past, roads that bypass forests or agricultural lands have been installed, but in recent years, roads that cross forests or agricultural lands have been newly established so that vehicles can reach the destination more efficiently.

Roads that cross forests and agricultural lands have the advantage of making traffic more convenient, but they also cause problems to block the pathways of wildlife in nature. As a result, wild animals move across the road causing wildlife and vehicle collisions, often causing damage to people and wildlife in the vehicle. In order to solve such problems, attempts have been made to prevent wild animals and vehicle accidents by installing an ecological passage through which wild animals can freely pass through both sides of the road, even if the road is within the activity range of wild animals.

The ecological passage is divided into an ecological bridge, which is installed in the form of a bridge on the upper side of the road, and an ecological tunnel, which is installed in the form of a tunnel on the lower side of the road, and is selectively installed according to the conditions of the road or surrounding environment. As shown in Fig. 1, the ecological bridge is a type of bridge that induces the migration of wild animals by creating an environment similar to the surrounding natural environment so that wild animals can easily go and go. For this purpose, the upper surface of the bridge requires vegetation and the minimum soil thickness required for vegetation is 1.5 m. Therefore, an ecological bridge should be constructed to withstand the weight of the soil, which is installed at a minimum of 1.5 m thickness.

As an example, the conventional ecological bridge 1 shown in Fig. 2 includes a soil layer 55 having a thickness of 1.5 m (h3) for vegetation, a bottom plate 30 for supporting the soil layer 55, And a beam 20 which is mounted on the shift 10 to support the weight of the soil layer 55 and the bottom plate 30. 1 includes the height h3 of the minimum vegetation layer 55 made of 1.5 m soil and the height h2 of the bottom plate 30 and the beam 20 required for vegetation, The minimum height h1 of the vehicle or the like on which the vehicle travels must be ensured so that the height h2 + h3 of the ecological passage becomes extremely high. When the upper plan height (H) of the ecological passage is increased, not only the view of the driver is secured but also the appearance of the road is poor, and also the construction of the ecological bridge (1) is costly.

According to Korean Patent Registration No. 10-893919, which discloses a method for constructing a bridge-type ecological passage for solving the above-mentioned problem, as shown in FIG. 3, the lower part of the beam 20 An eco-bridge 2 having a structure in which a bottom plate 30 is provided is proposed. According to this, a part of the vegetation layer 55 defined by the height h3 of 1.5 m or more can be utilized as the height h2 of the beam 20 in comparison with the ecological bridge 1 shown in Fig. 2 , The height of the upper plan height H of the ecological passage can be lowered.

However, the conventional ecological bridge 2 shown in Fig. 3 is not only very difficult to construct the bottom plate 30 in the lower flange or the abdomen of the beam 20, but also the bottom plate 30 and the beam 20, There is a problem in that there is a great possibility of leakage from the joint between the joints. In addition, the formation of the soil as much as 1.5 m or more over the entire width of the ecological bridge 2 causes the weight to be supported by the ecological bridge 2 to become very large, so that the cross section of the beam 20 of the ecological bridge 2 becomes large There is a problem that an excessive compressive stress acts on the upper flange, and therefore, the cross-section must be enlarged.

In order to solve such a problem, the method and construction of the ecological bridge according to Korean Patent Registration No. 10-1118552 filed by the present applicant with a patent application are easier than before, The ecological bridges are presented.

However, conventional ecological bridges all provide a way for wild animals to pass through the vegetation layer to help the passage of wild animals. However, humming animals such as snakes and rats, or animals belonging to rodents, There is still a problem in that the amount of animals belonging to humans and rodents dying down in the car still falls on the roads because they are reluctant to move along the road provided above. This has caused the destruction of ecosystems around the roads and the occurrence of traffic accidents while avoiding humming animals such as snakes and rats or animals belonging to rodents.

In order to solve the above-described problems, the present invention provides a pathway through which a humming animal or an animal belonging to a rodent can pass comfortably in a sound or humid area, And to provide an upper structure of an ecological bridge and a method of constructing the ecological bridge so that air can be saved.

The present invention relates to an upper structure of an ecological bridge derived in order to achieve the above-mentioned object, and a lower flange and a pair of upper and lower abdomen portions are formed at a position spaced apart from one or more ends of the lower flange, A first girder formed of a 'ㅛ' shaped girder having a U-shaped receiving space formed with an opening at an upper side thereof and having a prestress introduced therein by being tensed by a longitudinally inserted tension material; Shaped girder having a U-shaped receiving space formed by extending a pair of abdomen portions at the same height as the abdomen of the first girder and extending upward from the at least one end of the lower flange, A second girder which is placed alternately in the transverse direction of the first girder and in which a prestress is introduced by tensing the longitudinally tensioned tensions; The opening of the pair of abdomen of the first girder is opened and the upper end of the abdomen portion of the first girder and the upper end of the second girder are connected to each other so that the upper side of the quadrangle with the second girder which is adjacent in the transverse direction is closed A bottom plate formed; A gravel filled in a receiving space of the first girder; A passageway for communicating the lower space of the bottom plate with the surface of the earth surface alternately outside; The present invention also provides an upper structure of an ecological bridge.

This is because a first girder is manufactured so that a U-shaped receiving space is provided in the construction of an ecological bridge, a space surrounded by the lower flange and the abdomen of the first girder is formed as a soil layer for vegetation, 2 By installing a bottom plate to close the upper part of the girder, it is possible to form a vegetation layer with a thickness of 1.5m that allows the trees to grow their roots, It is intended to enable the construction of ecological bridges which are much lighter but lowered the height of the upper plan elevation.

Above all, a hollow space between the first girder and the second girder that has lowered the top plan elevation while being lightweight, and a tube connecting the outer side of the alternate outer side (backside) to the second ecological passage The first ecological passage of wild animals moving on the sunny side is provided on the upper side of the ecological bridge and the space between the first girder and the second girder of the ecological bridge is provided with a humid environment, By providing a second ecological passage through which the animal moves, it is possible to obtain the advantageous effect that all the ecological animals can pass through the ecological bridge through the road.

At this time, if the gap between the lower flange of the first girder and the lower flange of the second girder is wide, it can be configured to cover the gap with the plate which is mounted on the lower flange between the first girder and the second girder . Here, the gap may be formed of a flat plate or may be formed as a fitting plate in which a part of the gap is inserted in the lateral direction gap of the girder so as not to be distorted even if it is used for a long time.

The second ecological passage may be formed through the alternate chest wall and a rear surface of the alternate chest wall may be closely arranged on one side of the jaw protruding in the radial direction of the pipe forming the second ecological passage desirable. This makes it possible to prevent the end of the pipe from deviating from the space between the first girder and the second girder, even if a long time elapses, because the earth's earth pressure on the alternate back surface causes the earth's jaws to come in close contact with the back surface of the alternate chest wall .

According to another aspect of the present invention, there is provided a lower flange, comprising: a lower flange; and a U-shaped portion having a pair of abdomen portions formed upwardly at positions spaced apart from one or more ends of the lower flange, A first girder installation step of installing a first girder in which a prestress is introduced by tilting a tension member inserted in the longitudinal direction, A U-shaped member having a height corresponding to the abdomen of the first girder and having a lower flange and a pair of abdomen extending upwardly at a position spaced apart from one or more ends of the lower flange, Shaped prestressed girder having an accommodating space of a first prestressed prestress and a second prestressed prestressed prestressed stationary prestressed in a transversely spaced apart position relative to the first girder, A girder installation step; A plate mounting step of mounting a plate that covers a gap between a lower flange of the first girder and a lower flange of the second girder; The upper end of the abdomen of the first girder and the upper end of the second girder are connected to the bottom of the bottom of the first girder so as to close the upper side of the gap space with the second girder, A bottom plate mounting step of mounting the bottom plate to each other; A gravel filling step of filling gravel in the receiving space surrounded by the lower flange and the abdomen of the first girder and covering the gravel on the upper surface of the gravel; A second ecological passage forming step of forming a second ecological passage by providing a passage pipe connecting the space between the first girder and the second girder and the outside of the alternate outside soil; The present invention also provides a method of constructing an eco-bridge.

The term " shift " as used in this specification and claims is used to mean a bridge structure supporting a girder or the like, a sub structure such as an alternation, in order to manufacture a bridge.

As described above, according to the present invention, in constructing an ecological bridge, a first girder is formed so as to have a shape of "ㅛ", and a space surrounded by the lower flange of the first girder, the abdomen and the partition wall is formed into a soil layer And the first ecological passage through which wild animals inhabited by sunshine are formed. At the same time, an empty space between the girders is connected to the outside of the external soil by a passage pipe, 2 ecological pathways together, it is advantageous to allow the wild animals loving the sunny side of the bridge and the middle part of the bridge to freely pass under the environment suitable for their habits, Effect can be obtained.

In addition, the present invention is characterized in that, in order to enable the animals belonging to humid animals or rodents to pass comfortably, a hooking protrusion protruding in the radial direction from the outside of the soil and the hollow space between the first girder and the second girder, It is possible to firmly maintain the state in which the pipe forming the passage is closely adhered to the alternate back surface by the earth pressure of the gravel on the alternate back surface, thereby preventing the passage from being cut off or buried even if a long time elapses The advantageous effect can be obtained.

Fig. 1 is a perspective view showing the appearance of a conventional ecological bridge.
Figure 2 is a schematic cross-
Figure 3 is a cross-sectional schematic of another type of conventional ecological bridge
Fig. 4 is a perspective view showing the construction of an ecological bridge according to the first embodiment of the present invention. Fig.
Fig. 5 is a side sectional view of Fig. 4
6A to 6F are perspective views showing the construction according to the construction sequence of the ecological bridge of FIG.
7A and 7B are cross-sectional views of a first girder used in the construction of the ecological bridge of FIG. 4,
Fig. 8 is a longitudinal sectional view showing the configuration of a tension member provided on the abdomen of the first girder of Fig. 4,
9 is a cross-sectional view taken along the line YY in Fig. 7
10 is an enlarged view of a portion 'A' in FIG.

Hereinafter, an ecological bridge 100 according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

As shown in the drawings, an ecological bridge 100 according to a first embodiment of the present invention includes a pair of alternating 110 arranged on a top surface and having a coaxial device 113 installed thereon, a lower flange 121a, And a pair of abdomen portions 121b extending upward from the U-shaped portion 120U and having a U-shaped portion 120U in which an opening is formed on an upper surface of the U-shaped portion 120U. Quot; -shaped girder 120 and a " girder " girder 120, which are installed in alternation by introducing a prestress by tightening the longitudinally tensioned material, are horizontally connected to each other, And a lower flange 121a of the ㅛ-shaped girder 120. The bottom flange 121a of the ㅛ-shaped girder 120 is bent so that the upper flange 121a of the umbrella girder 120 is connected to the lower flange 121a of the umbrella- The accommodation space 120c surrounded by the abdomen 121b and the partition wall 124 and the upper side of the bottom plate 130, A plate 150 or 150 'covering the gap C between the lower flange 121a and the lower flange 121a between the abutting portions between the gravel-like material 55 on which the living layer is formed and the' ㅛ ' Shaped girder 120 adjacent to each other and a second ecological passage (hereinafter referred to as " second ecological passage ") through which an animal belonging to a humorous or rodent animal communicates with an outside space between the opposite abdominal portions between the transversely adjacent & (Tube) 160 that forms a part of the exhaust pipe P2.

That is, according to the present invention, a first ecological passage (P1) is provided on the upper side of the bridge for allowing the wild animals living in the sunny environment to pass comfortably by the vegetation layer being floated on the gravel (55) ) Side space 130c is characterized by being provided with a second ecological passage P2 through which humans who prefer to live in shade or animals belonging to rodents can pass comfortably.

The alternation 110 includes a base 111 embedded in the ground at a position spaced apart from each other as shown in FIG. 6A, a wall 112 extending upward from the base 111, And a calibration device 113 which is mounted on the table. The wall 112 is provided with a chest wall 112a on the rear surface where the coordinate device 113 is seated to minimize the release of the gravel 88 on the outside of the alternate back surface to the side of the coordinate device 113. [

The 'ㅛ' shaped girder 120 is formed by the ㅛ-shaped girder 120, which is formed in the same manner and method as the U-shaped girder 120U, The girder is all done. Shaped girder 120 includes a lower flange 121a and a pair of umbrella-shaped concrete 121 (hereinafter, referred to as " umbrella ") 121a formed by a pair of belly portions 121b extending upwardly at positions spaced apart from both ends of the lower flange 121a . Here, the height of the abdomen 121b is preferably the same. The girth portion 120b is vertically extended from the lower flange 121a to the lower flange 121a of the girder 120. In this embodiment, (This is also referred to as a " ㅛ-shaped girder 120 "). The lower flange 121a may protrude laterally from the abdomen 121b while the lower flange 121a may extend laterally from the abdomen 121b. (Also referred to as a '-shaped girder 120').

The prestress is introduced into the ㅛ-shaped girder 120 by using the lower flange 121a and the tension member 122 longitudinally inserted into the umbrella portion 121b. A plurality of stranded strands 122c may be disposed on the lower flange 121a and the abdomen portion 121b of the stranded girder 120 so that the stranded strand 122c may be strained to introduce a compressive prestress.

As shown in FIG. 8, a tension member 122 for introducing a compressive prestress into a '-shaped' girder 120 is formed in a straight line on the upper part of the neutral axis in the abdomen portion 121b of the ' And a tension strand 122b is provided on the sheath tube arranged in a parabolic shape so as to pass under the neutral axis of the abdomen portion 121b at the central portion of the umbrella girder 120 And a fixing port 129 for receiving both ends of the compression bar 122a and both ends of the tension bar 122b are provided. At this time, tensile strands 122b and 122c are arranged to pass through the lower side edge of the neutral side at the central portion of the ㅛ-shaped girder 120 as shown in Fig.

When the tensile strand 122b is pulled in the state where the tensile member 122 is installed as described above, the tensile strand 122b acts to push the end of the compressive strength rod 122a by the reaction force, A compressive stress is introduced to the lower side of the center portion, and a tensile stress is introduced to the upper side of the neutral axis of the central portion, whereby moment moment prestress can be introduced. Then, the block-out area where the fixing port 129 is located is worn by the on-site poured concrete 121c after introducing the deflection displacement. Although not shown in FIGS. 7A and 7B, both end portions of the '-shaped girder 120 can be formed as shown in FIG. 8 in a blocked area receiving the fixing port 129.

7B, the upper portion of the abdomen portion 121b 'of the first girder 120' is subjected to a large compressive stress, so that the upper portion of the abdomen portion 121b 'of the first girder 120' Can be formed so as to have an enlarged cross section, so that it is possible to more effectively cancel the large compressive stress acting on the upper side of the joint. At this time, the abdomen portion 121b 'of the first girder 120' formed of concrete has a predetermined section across the entire longitudinal direction so as to prevent a local stress from acting largely and to facilitate the installation of the building formwork, It is preferable that the cross-section of the end portion is formed to be widened.

A bottom plate connecting reinforcing bar 123 is protruded upward and is coupled to a bottom plate reinforcing bar (not shown) that is disposed inside the bottom plate 130 at the upper end of the abdomen portion 121b of the ㅛ-shaped girder 120 Shaped girder 120 and the bottom plate 130 by being covered with the bottom plate concrete synthesized on the upper side of the 'ㅛ' shaped girder 120 at the same time.

Shaped girder 120 is formed in such a manner that the rib 124b connecting the lower flange 121a between the abdomen portions 121b at the position where the beam 128 is connected is formed in advance . The vegetation layer having a thickness of 1.5 m or more can be formed by filling the space surrounded by the partition wall 124, the lower flange 121a and the abdomen 121b. A drain hole 124a through which the rainwater can be discharged from the gravel 55 is formed in the partition wall 124. The cross beam 128 is connected to the front and rear surfaces of the ' And is configured to interconnect the abdomen portions 121b at positions including both ends of the girder girder 120. [

In addition, on the upper side of the outer side abdomen of the outermost 'umbrella-shaped girder 120 of the ecological bridge 120, when the bottom plate concrete is combined with the ㅛ-shaped girder 120, the slag 55 is prevented from flowing down The step 129 is synthesized by a higher height L for the sake of simplicity.

Since the lower flange 121a is formed to extend from the position of the abdomen 121b in both directions, the 'U' shaped girder 120 constructed as described above has a high section modulus and is resistant to the torsional displacement or the downwardly deflecting displacement Not only is it more effective to install the cross beams 128 that are laterally connected and constrained between the transversely adjacent " ㅛ " shaped girders 120.

A beam connecting reinforcing bar 126 is laterally protruded from both sides of the abdomen portion 121b of the ㅛ-shaped girder 120 on which the beam 128 is installed. The cross beam reinforcing bars projected on the outer side of the abdomen portion 121b of the ㅛ-shaped girder 120 (the side opposite to the adjacent girder) are connected to reinforcing bars disposed on the side beams 128, do.

Generally, a large amount of stress is applied to the center portion of the span during the use of the bridge constructed on the shift 110. In particular, the girder supporting the load acting on the bridge has a large compressive stress acting on the upper part of the span at the center of the span. Therefore, the first girder 120 'of the ecological bridge according to another embodiment of the present invention is formed so as to be able to withstand the stress acting on the upper part of the span center part as shown in FIG. 7B, The upper end portion of the second end portion 121b 'may be formed in a larger cross section.

Shaped girder 120 so as to be firmly connected to the beam connecting reinforcing bars 126 exposed on the outer surface of the abdomen portion 121b of the ㅛ-shaped girder 120 arranged in the transverse direction, In the horizontal direction. Thus, as shown in FIG. 6C, the ecological bridge 100 according to the present invention forms continuous heat by the abdomen 121b in the longitudinal direction and supports the load acting on the bridge, Since the load acting on the bridge is supported by forming the continuous heat by the partition wall 128 and the partition wall 124, it is possible to realize the complete plate behavior with respect to the self weight and the external force so that even if a higher load acts locally, The force can be effectively supported by the girder 120.

The cross beams 128 are installed on the site in a state where the '-shaped' girders 120 are mounted on the shift 110. Shaped girder 120 mounted on the shift 110 is provided with a lower flange 121a protruding outward with respect to the abdomen 121b so that the risk of falling on the lower flange 121a protruding outward from the worker (Not shown) so as to be supported by the lower flange 121a and to support the beam 128 so as to be supported by the lower flange 121a. Therefore, it is possible to construct the beam 128 very easily. For this purpose, it is preferable that the 'ㅛ' shaped girder 120 mounted on the shift 110 is spaced apart from the gap between the lower flanges 121a only by an interval of about 10 cm which is not fallen by the operator.

The crossbeam 128 formed in the space between the abdomen portions of the transversely adjacent 'ㅛ' -shaped girder 120 is provided with a passage pipe 160 of the second ecological passage P2 through which the humid- A hole 129a is formed.

As shown in FIG. 6D, in the bottom plate 130, the accommodation space 120c formed by the pair of belly 121b of the 'ㅛ' -shaped girder 120 mounted on the alternate 110 is opened, The upper side of the abdominal portion 121b is connected to the upper side of the abutment space 130c. That is, the bottom plate 130 connects the abdomen portions 121b of the adjacent 'ㅛ' -shaped girders 120, and a pair of the pair of the umbrella girders 120 formed in the plurality of rows in the alternation 110 The upper end portion of the abdomen portion 121b of the main body 121 is not connected to each other.

The space 120c surrounded by the lower flange 121a and the pair of the abdomen 121b and the partition wall 124 of the grommet type girder 120 is opened upward so that the gravel 55 can be filled, And the short space 130c of the 'ㅛ' shaped girder 120 is left as a hollow space below the bottom plate 130. The soil 55 is filled in the receiving space 120c of the ㅛ-shaped girder 120 and further filled in the upper space of the bottom plate 130 and the receiving space 120c, Form a vegetation layer.

A vegetation layer is formed by the soil 120 in the receiving space 120c of the ㅛ-shaped girder 120 and is composed of the soil H having a thickness of at least 1.5 m which the wood 45 can grow, A vegetation layer formed of a thin thickness H '' in which the grass 44 can grow in the upper space of the first tree 130 is formed so that the first tree consisting of the tree 45 and the grass 44, Thereby forming an ecological passage P1.

The plates 150 and 150 'are mounted on the lower flange 121a of the' ㅛ '-shaped girder 120 adjacent to the transversely opposite sides of the umbrella-shaped girder 120, The clearance C of the bottom surface of the space 130c formed in the bottom surface is closed with the clearance C on the bottom surface so that the humid animal can pass smoothly through the second ecological passage P2. However, according to another embodiment of the present invention, when the clearance C of the bottom surface of the space 130c formed between the abdomen portions of the ㅛ-shaped girder 120 is small, the plates 150 and 150 ' It may not be installed.

6D, the plates 150 and 150 'are installed so as to cover the gap C between the lower flanges of the ㅛ-shaped girder 120 along the longitudinal direction of the girder 120, 120 may be covered with one or a plurality of plates 150, 150 '. At this time, a part of the plate 150 is sandwiched between the clearances C so that the plate 150 can be firmly installed without being twisted, or can be formed in a flat plate shape to easily obscure a gap between the girders 120.

The passage pipe 160 is installed in order to extend the second ecological passage P2 formed in the empty space 130c between the abdomen portions of the umbrella-shaped girder 120 to the toe surface of the alternate- do. For this purpose, the ribs 128a and 128b are formed in the chest wall 112a of the alternating 110 and the cross beams 128 installed in the short space 130c between the ' 110b are formed. At this time, the shapes of the holes 128a and 110b are determined so as to conform to the external shape of the passage pipe 160. [ Thus, as shown in Fig. 4, the passage pipe 160 sequentially extends from the empty space 130c through these holes 128a and 110b, and extends to the toe surface.

On the other hand, in order that the passage pipe 160 can be fixed firmly to the expansion and contraction of the bridge due to seasonal and temperature changes, the passage pipe 160 is formed to have a length of 160L which is longer than the extension length of the bridge, (Not shown). Although not shown in the drawing, the bottom surface of the passage pipe 160 is fixedly positioned so as to be in close contact with the upper surface 120as of the lower flange 121a of the girder 120 so that the animals can smoothly move through the second ecological passage P2. .

A locking protrusion 161 protruding in the radial direction is formed in a flange shape in the passage tube 160 and the locking protrusion 161 is in close contact with the back surface of the alternation 110. As a result, the passage pipe 160 is always brought into close contact with the rear surface of the alternation 110 by the earth pressure 88P acting on the gravels 88 on the alternate back surface. Therefore, even if a long period elapses after the construction of the ecological bridge, It is possible to prevent the first and second eco-paths P2 and P2 from being detached and collapsed.

9 shows a case in which the passage pipe 160 is provided for each empty space 130c between the abdomen portions of the umbrella girder 120. Considering the scattering of the surrounding wild animals on which the ecological bridge 100 is installed According to another embodiment of the present invention, the passage pipe 160 may be installed only for a part of the empty space 130c between the abdomen portions of the ㅛ-shaped girder 120. [ Although the cross-sectional shape of the passage tube 160 is a square cross-sectional view in the figure, according to another embodiment of the present invention, a circular cross-sectional structure may be applied, and a tube having various cross- .

As described above, the empty space 130c between the path tube 160 and the abdomen of the girder 120 is communicated with each other to form the dark second ecological passage P2 from the one alternate toe to the other alternate toe, Humans such as snake-like animals in dark places and wet places and animals belonging to rodents such as rats can freely move through ecological passages P1 and P2, respectively, which are suited to their own habits.

Hereinafter, a method of constructing an ecological bridge according to the present invention will be described in detail.

Step 1 : First, a '-shaped' concrete 121 made up of a long lower flange 121a and a pair of abdomen portions 121b extending upward from a position spaced apart from both ends of the lower flange 121a, . At this time, a reinforcing bar is inserted into the concrete 121 so that the bottom plate connecting reinforcing bar 123 protrudes above the abdomen 121b and the transverse connecting reinforcing bar 126 protrudes also laterally of the abdomen 121b. At this time, a partition wall 124 is formed between the pair of abdomen portions 121b at both ends and a central portion of the girder 120 in advance. The barrier ribs 124 may be integrally formed at the time of manufacturing the ㅛ-shaped girder 120, but may be combined with the ㅛ-shaped girder 120 at the time of installing the laterally-

8, a tensile strand 122c is provided in the sheath tube of the lower flange 121a and the abdomen 121b, and optionally the compressive steel bar 122a and the corresponding tensile strand 122a 122b may be additionally disposed.

In order to withstand the compressive stress acting on the upper end portion of the abdomen portion 121b, the 'U' shaped girder 120 may be manufactured in an enlarged cross section of the upper end portion of the abdomen portion 121b 'as shown in FIG. 8b .

Step 2 : Thereafter, the lower flange 121a of the ㅛ-shaped girder 120 and the tension member 122 longitudinally inserted into the abdomen 121b are tensed to form a compressive prestress . More specifically, the strand 122c is tensed to introduce a compressive prestress into the " ㅛ " When necessary, the fixing port 129 acts to push the end of the compression use steel bar 122a by a reaction force by pulling the tension use strand 122b, so that the neutral axis of the " A compressive stress is introduced to the lower side of the abdomen, and a tensile stress is introduced to the upper side of the neutral axis of the abdomen middle.

Step 3 : On the other hand, as shown in FIG. 6A, the alternation 110, which is arranged to be spaced apart from each other, is installed at a position where the ecological bridge 100 is to be installed. Step 3 may be performed simultaneously with steps 1 and 2, and may be performed before steps 1 and 2. At this time, a hole 110b through which the passage pipe 160 can pass is formed in the chest wall 112a of the alternation 110 in accordance with the shape of the passage pipe 160. [

Step 4 Then, as shown in FIG. 6B, the '-shaped' girder 120 manufactured in Step 2 is mounted on the upper side of the coordinate system 113 of the shift 110 in a plurality of rows. It is preferable that the gap C of the lower flange 121a of the 'ㅛ' shaped girder 120 adjacent in the transverse direction is maintained at an interval of about 10 cm. In this way, it is possible to prevent an operator from falling down between the clearance C of the lower flange 121a on the lower flange 121a protruding outwardly of the 'ㅛ' -shaped girder 120. However, in applying the 'ㅛ' shaped girder 120 having a predetermined dimension to bridges of various widths, when the gap C is constructed to be larger than approximately 25 cm to 30 cm, A fall preventing foot plate may be mounted on the projecting portion of the flange 121a.

Step 5 : On the lower flange 121a protruding from both sides of the abdomen 121b, the operator installs a transverse die (not shown) for constructing the transverse bar 128. Since the mold is installed to be supported on the lower flange 121a protruded from the abdomen 121b to both sides, it is very easy to install the mold. As shown in FIG. 6C, the cross beams 128 are connected to the '-shaped' girder 120 adjacent to the transverse direction by inserting the unhardened concrete into the beam form. In this case, the cross beam 128 connecting the transversely adjacent 'ㅛ' -shaped girder 120 is also installed to be supported on the lower flange 121a whose bottom surface protrudes from both sides from the abdomen 121b.

The beam 128 is synthesized at a position in a row which is continuous in the transverse direction with the partition wall 124 connecting the pair of belly 121b of the ㅛ-shaped girder 120. Accordingly, the upper structure of the bridge 100 by the beam 128 and the barrier ribs 124 is horizontally supported by the ribs 121 and the ribs 128 and the ribs 124 in the horizontal direction, So that it is possible to effectively support the external force acting on the upper structure of the bridge 100. At this time, a hole 128a through which a humid animal or the like can pass is formed in the cross beam 128 installed at the center of the girder, and a hole 128 in which a passage pipe 160 can be installed (128a) is formed.

Step 6 : The gap C between the lower flanges 121a of the transversely adjacent " ㅛ " girder 120, as shown in Fig. 6D, which is a sectional view along the cutting line XX in Fig. 6C, The upper and lower plates 150 and 150 'are mounted on the lower flange 121a to cover the clearance C, respectively. As a result, the empty space 130c between the abdomen of the adjacent girder 120 can safely pass through even a small humorous animal or an animal belonging to a rodent.

Step 7 : Then, as shown in Fig. 6E, the upper end of one of the pair of abdomen portions 121b of the " ㅛ " girder 120 mounted on the plurality of rows on the alternate 110, A bottom plate formwork (not shown) is installed so as to connect the upper ends of one of the pair of abdomen portions 121b of the other umbrella girder 120, and then the bottom plate reinforcing bars are bound to the bottom plate connecting reinforcing bars 123 Then, the non-hardened concrete is poured into the bottom plate form to synthesize the bottom plate 130 with the 'U' shaped girder 120. At the same time, when the bottom plate concrete is combined with the 'ㅛ' -shaped girder 120 on the outer side of the outer abdomen of the outermost 'ㅛ' shaped girder 120 of the ecological bridge 120, The step 129 is combined with the front end face of the outermost abdomen portion 121b of the " ㅛ "

The bottom space 130c between the 'U' shaped girders 120 is left as an empty space due to the construction of the bottom plate 130, and the upper side thereof is completely closed. At this time, the step 7 may be performed simultaneously with the step 5 and the step 6.

Step 8 : When the bottom plate 130 is synthesized with sufficient strength in the '''shaped girder 120, as shown in FIG. 6F, the back surface of the shift 110 is filled with the gravel, The gravel 55 'and the gravel 55 are filled in the receiving space 120c of the gravel type girder 120 and the gravel 55 is also covered on the upper side of the bottom plate 130. [ 11, the soil 55 filled in the receiving space 120c is formed to have a sufficient thickness H 'of 1.5 m or more. Therefore, the trees 45 and the like, which are deeply rooted, are planted. 130, the grass 55 is formed to have a relatively shallow thickness H "so that the grass 44 and the like, which lower the root at a shallow depth, are planted, so that the first ecological passage (P1) is formed on the upper surface of the ecological bridge (100).

Step 9 : After step 8 is performed or concurrently with step 8, the passage tube 160 moves the hole 110b formed in the alternate chest wall 112a and the hole 128a of the crossbow 128 sequentially And the passage tube 160 is installed so that the stopping jaws 161 of the passage tube 160 are brought into close contact with the rear surface of the alternation 10.

Then, as shown in FIG. 5, the soil of the alternate back surface of the ecological bridge 100 is buried so that it is buried in the soil material 88 except for the end portion of the passage pipe 160. Thereby, a dark second ecological passage P2 connecting the passage pipe 160 and the hollow space 130c between the 'ㅛ' girder is simply formed.

The ecological bridge 100 constructed as described above has a structure in which the soil 55 is accommodated in the U-shaped receiving space of the ㅛ-shaped girder 120 so that a relatively large tree grows and a relatively small pool The first ecological passage P1 through which the wild animals enjoying sunny rays can comfortably pass through is formed by the vegetation layer that grows and the outer soil 130a is formed in the empty space 130c in the lateral direction between the ' (105) to the toe surface of the bridge (88) to form a second ecological passage (P2) to which a humming animal that likes shade or an animal belonging to rodents can pass comfortably together, Wild animals that like sunshine and animals that belong to hummingbirds or rodents who like shade each freely pass under the environment that suits their habits.

In addition, the present invention can easily construct a second ecological passage (P2) through which a humid environment animal can comfortably pass by utilizing the empty space (130c) between the girders (120) When the passage pipe 160 is connected to the top surface of the toe pipe 160, the stopping jaws 161 are kept in close contact with the alternate back surface due to the earth pressure so that the installation state of the passage pipe 160 can be firmly maintained even after a long period of time The advantageous effect can be obtained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

100: ecological bridge 110: shift
120: 'ㅛ' shaped girder 121a: Lower flange
121b: Abdomen 122: Tension material
124: partition wall 128:
129: step 130: bottom plate
150: plate 160: passage tube
55: Tosa

Claims

Shaped girder having a U-shaped receiving space in which a pair of abdomen portions are formed upward at a position spaced apart from one or more ends of the lower flange and an opening is formed on the upper side of the end face, A first girder having a vertically oriented tension member taut, and a prestress introduced therein, the first girder being mounted on an alternating surface;
Shaped girder having a U-shaped receiving space formed by extending a pair of abdomen portions at the same height as the abdomen of the first girder and extending upward from the at least one end of the lower flange, A second girder which is placed alternately in the transverse direction of the first girder and in which a prestress is introduced by tensing the longitudinally tensioned tensions;
The opening of the pair of abdomen of the first girder is opened and the upper end of the abdomen portion of the first girder and the upper end of the second girder are connected to each other so that the upper side of the quadrangle with the second girder which is adjacent in the transverse direction is closed A bottom plate formed;
A gravel filled in a receiving space of the first girder;
A passage pipe communicating the lower space of the bottom plate with the surface of the earth surface alternately to form a part of the second ecological passage;
And the upper structure of the ecological bridge.

The method according to claim 1,
A plate on which both the lower flange of the first girder and the lower flange of the second girder are mounted so as to cover a space between the first girder and the second girder;
Wherein the upper structure of the eco-bridge is further comprised of at least one of the following:

3. The method according to claim 1 or 2,
Wherein the passage is formed through an alternate chest wall and one side of a locking protrusion protruding in a radial direction of the passage pipe forming the passage is in close contact with a back surface of the alternate chest wall.

Shaped girder having a U-shaped receiving space in which a pair of abdomen portions are formed upward at a position spaced apart from both ends of the lower flange and openings are formed on the upper side of the cross section, A first girder installation step of alternately mounting a first girder in which a prestressed girder is tensed by tilting a tension member in the longitudinal direction;
A U-shaped portion having a height corresponding to the abdomen of the first girder and having a lower flange and a pair of abdomen portions extending upwardly at positions spaced apart from both ends of the lower flange, Shaped girder having a receiving space for accommodating the prestressed prestressed material, and a second girder for receiving the prestressed second girder at an alternating position spaced transversely from the first girder, Installation steps;
A plate mounting step of mounting a plate that covers a gap between a lower flange of the first girder and a lower flange of the second girder;
The upper end of the abdomen of the first girder and the upper end of the second girder are connected to the bottom of the bottom of the first girder so as to close the upper side of the gap space with the second girder, A bottom plate mounting step of mounting the bottom plate to each other;
A gravel filling step of filling gravel in the receiving space surrounded by the lower flange and the abdomen of the first girder and covering the gravel on the upper surface of the gravel;
A second ecological passage forming step of forming a second ecological passage by providing a passage pipe connecting the space between the first girder and the second girder and the outside of the alternate outside soil;
The method for constructing an ecological bridge according to claim 1,