JP2019019483A - Frame structure - Google Patents

Abstract

To effectively suppress a blockage of a flow port of water in a flow path for a forest conservation, flood control, or road drainage by debris flow.SOLUTION: A frame structure 1 is provided with frame bodies 100A to 100F defined in a prismatic shape by a ceiling wall 120, a front side wall 130, a left side wall 140, a right side wall 150, and a rear side wall 160. Each of the side walls includes two longitudinal members defining opposite sides in a lateral direction, a plurality of cables stretched along the respective side walls so as to connect the two longitudinal members, and a wire gauze stretched along each side wall so as to connect the two longitudinal members. In addition, the ceiling wall 120 includes two cross members defining the two sides, a plurality of cables stretched along the ceiling wall 120 so as to connect the two cross members, and a wire gauze stretched along the ceiling wall so as to connect the two cross members. The frame body 100 is installed so as to straddle a flow port of water.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a frame structure.

  A water flow path such as a drainage channel may be provided for forestry, flood control or road drainage. Such a channel is provided, for example, on a road laid so as to cross the middle of a mountain slope as follows. The inflow port of the flow path is arranged so as to be exposed on the ground surface on the road side above the slope so that a large amount of water flowing down from the upper side of the slope toward the road can be taken in. From there, the flow path passes through the basement of the road and extends to an outlet formed at a position separated from the road in the direction of going down the slope. Thereby, a large amount of water can be discharged down the road through the channel.

  On the other hand, there is a case where a rock fall protection fence as in Patent Document 1 is used for the purpose of protecting roads on slopes. Such a rockfall protection fence includes a vertical member, a wire rope, and a wire mesh, and these members receive rockfalls from above the slope.

JP 2017-14760

  The debris flow generated by the influence of torrential rain, etc., may block the water distribution port (inlet, etc.) in the flow path as described above. If the water distribution port is blocked, a large amount of water to be discharged through the flow path accumulates on the side of the road embankment, etc. There is a risk of flood damage such as banking collapse due to flow. On the other hand, it is also conceivable that the debris flow coming toward the water distribution port is received by the falling rock protection fence. However, the present inventors have found that the conventional method using the rockfall protection fence is not necessarily effective enough to prevent the inlet from being blocked by a debris flow.

  The objective of this invention is providing the frame structure which can suppress effectively that the distribution | circulation port of the water in the flow path for forestry, flood control, or road drainage is obstruct | occluded by the debris flow, and its installation method.

  Even if the present inventors provide a fence as described above in front of the inflow port with respect to the predicted debris flow, the debris flow does not necessarily come from only the front. We thought that such a fence was not effective enough because it could get over and reach the flow channel outlet. Therefore, the present inventors decided to adopt a structure that protects debris flows from a plurality of directions using a frame structure rather than protecting the debris flow only with a fence at the front. And it reached | attained that such a structure was comprised as follows.

  The frame structure of the present invention is a frame structure including a first frame body that is defined in a prismatic shape by three or more side walls, wherein each side wall of the first frame body is a side of each side wall. Two first vertical bar members defining opposite sides in the direction, a plurality of first rope members stretched along the side walls so as to connect the two first vertical bar members, and the 2 First net members stretched along the side walls so as to connect the first vertical bar members of the book, and straddle the water distribution port in the flow path for forestry, flood control or road drainage The first frame is installed.

  In another aspect, the frame structure installation method of the present invention is a frame structure installation method including a first frame body defined in a prismatic shape by three or more side walls, wherein the first frame body A plurality of the side walls of the plurality of side walls are stretched along the side walls so as to connect the two first vertical bar members defining the opposite sides of the side walls in the lateral direction and the two first vertical bar members. A first net member, and a first net member stretched along each side wall so as to connect the two first vertical bar members. The first frame is installed so as to straddle the water distribution port in the road.

  According to the frame structure of the present invention and the installation method thereof, a wall is not installed only on the front side with respect to the debris flow, but the first frame having three or more side walls straddles the water distribution port of the flow path. Installed. Each wall includes two rod members and a cable member (for example, a steel cable) and a mesh member (for example, a wire mesh) stretched so as to connect the two rod members. The debris flow is received by the rope member and the net member on each wall of the first frame. Three or more side walls surrounding the internal space of the first frame prevent the debris flow from reaching the first frame from the lateral direction. Therefore, the first frame body is protected against debris flow from any direction in the lateral direction. Therefore, it is possible to effectively suppress the debris flow from reaching the water circulation port by installing the first frame so as to straddle the water circulation port. As a result, a situation in which a large amount of water is accumulated due to the blockage of the distribution port is suppressed, and therefore, the possibility that the accumulated water will cause enormous damage to the road embankment or the like is reduced. The water distribution port includes both an inflow port through which water flows and an outflow port from which water flows out.

  In the present invention, the first frame body is defined in a prismatic shape by a ceiling wall in addition to the three or more side walls, and the ceiling wall of the first frame body has two sides of the ceiling wall. Two first horizontal bar members that define the first horizontal bar member, a plurality of second rope members stretched along the ceiling wall so as to connect the two first horizontal bar members, and the two second horizontal bar members It is preferable that a second net member stretched along the ceiling wall so as to connect the one horizontal bar member is included. According to this, the ceiling wall is provided in the first frame. The ceiling wall includes two rod members and a cable member and a net member stretched so as to straddle the rod members, and suppresses the debris flow from reaching the first frame body from above. Therefore, the first frame body is protected not only from the horizontal direction but also from the debris flow from the vertical direction.

  The present invention further includes a second frame body defined in a prismatic shape by three or more side walls and a ceiling wall, and each side wall of the second frame body relates to a lateral direction of each side wall. Two second vertical bar members defining opposite sides, a plurality of third cord members stretched along the side walls so as to connect the two second vertical bar members, and the two A third net member stretched along the side walls so as to connect the second vertical bar members, and the ceiling wall of the second frame body defines two sides of the ceiling wall. A plurality of fourth cable members stretched along the ceiling wall so as to connect the two second horizontal bar members, and the two second horizontal bar members A fourth net member stretched along the ceiling wall so as to connect the first frame body and the second frame body to each other on one side wall. It is preferable to have been. According to this, the 2nd frame which has the structure similar to a 1st frame is provided so that it may connect with the side wall of a 1st frame. Thereby, the debris flow from the direction in which the second frame is provided toward the first frame is first received by the second frame. Therefore, it is possible to more effectively suppress the debris flow from reaching the water distribution port in the first frame.

  Moreover, in this invention, it is preferable that the two said 2nd frame bodies are connected with the said 1st frame body so that the said 1st frame body may be pinched | interposed. According to this, since the 2nd frame is provided in the both sides of the 1st frame, it can further suppress that the debris flow from both sides reaches the distribution port of water in the 1st frame.

  In the present invention, it is preferable that the first frame is a quadrangular prism and at least three of the second frames are connected to the first frame on the side walls of the different first frames. . According to this, the second frame receives a debris flow coming from the three sides of the first frame toward the first frame. Therefore, it is possible to more effectively suppress the debris flow from reaching the water distribution port in the first frame.

  Moreover, in this invention, it is preferable that the member which forms each side wall in the connection part of the said 1st frame and the said 2nd frame is mutually shared. According to this, the member which forms the side wall of a 1st frame and a 2nd frame is mutually shared. Therefore, it is possible to form the frame structure with a small number of members.

  In the present invention, it is preferable that the first frame and the second frame are prismatic shapes having the same shape and size. According to this, since the first frame body and the second frame body have the same shape and size, it is easy to share the members forming both the frame bodies. When the members are shared, the productivity of the frame is improved.

  The present invention further includes a second frame body defined in a prismatic shape by three or more side walls and a ceiling wall, and each side wall of the second frame body relates to a lateral direction of each side wall. Two second vertical bar members defining opposite sides, a plurality of third cord members stretched along the side walls so as to connect the two second vertical bar members, and the two A third net member stretched along the side walls so as to connect the second vertical bar members, and the ceiling wall of the second frame body defines two sides of the ceiling wall. A plurality of fourth cable members stretched along the ceiling wall so as to connect the two second horizontal bar members, and the two second horizontal bar members And a fourth net member stretched along the ceiling wall so as to connect the second frame body so as to include an internal space defined by the first frame body. It may be. According to this, the 2nd frame is installed so that the interior space of the 1st frame may be included. For this reason, the debris flow toward the first frame is first received by the second frame. Therefore, it is possible to more effectively suppress the debris flow from reaching the water distribution port in the first frame.

It is a figure which shows the installation condition of the frame structure which concerns on one Embodiment of this invention. It is a top view of the frame structure of FIG. FIG. 3A is a schematic plan view of the frame structure showing a connection state of the six frames constituting the frame structure of FIG. FIG. 3B is a perspective view showing a schematic configuration of one frame. FIG. 4 is a front view of a portion surrounded by a dashed line IV in FIG. 2. FIG. 3 is a front view of a portion surrounded by a dashed line V in FIG. 2. FIG. 3 is a right side view of a portion surrounded by an alternate long and short dash line VI in FIG. 2. FIG. 3 is a right side view of a portion surrounded by a dashed line VII in FIG. 2. FIG. 5 is a right side view of a portion surrounded by a dashed line VIII in FIG. 2. FIG. 5 is a partially enlarged view of an upper portion of a front side wall shown in FIG. 4. It is the elements on larger scale of the upper part of the right side wall shown in FIG. It is a figure which shows the installation condition which concerns on the example of installation different from FIG. 1 of a frame structure. Each of FIG. 12A to FIG. 12E is a schematic plan view according to a modification of the frame structure.

  A frame structure 1 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the frame structure 1 is installed in the vicinity of a road R that crosses the middle of a slope. A drainage channel E is formed in the basement of the road R. The drainage channel E has an inlet e1 and an outlet e2. As shown in FIG. 1, the inflow port e <b> 1 is exposed on the ground surface in the depression Rs formed on the side of the road on the upper side of the slope. The depression Rs is arranged so that water flows from a stream above the slope. In such facilities, there is a concern that a debris flow will occur from many directions in the case of torrential rain, etc., and flow into the depression Rs. If the debris flow that has flowed into the depression Rs closes the inlet e1, a large amount of water accumulates around the depression Rs, and there is a risk that serious flood damage such as collapse of the road embankment may occur. Therefore, in order to protect the inlet e1 from such a debris flow, the frame structure 1 is disposed so as to straddle the inlet e1 at the bottom of the depression Rs. In the following description, the front, rear, left, right, top, and bottom directions are specific to the frame structure 1. The frame structure 1 is disposed such that a vertical member 131 (described later) along the vertical direction is substantially orthogonal to the ground surface. Since the ground surface is not always horizontal, the vertical direction unique to the frame structure 1 is not always along the vertical direction. Therefore, the left-right direction and the front-rear direction do not necessarily follow the horizontal direction.

  As shown in FIG. 2 and FIG. 3A, the frame structure 1 is formed by connecting six frame bodies 100 having a schematic shape of a prism, more specifically a rectangular parallelepiped shape. Two of the six frames 100 are arranged along the left-right direction at the front portion of the frame structure 1. Hereinafter, when these two frames 100 are referred to as being distinguished from others, they are referred to as frames 100A and 100B in order from the left. Four of the six frames 100 are arranged along the left-right direction at the rear part of the frame structure 1. Hereinafter, when these four frame bodies 100 are referred to as distinguished from each other, they are referred to as the frame bodies 100C, 100D, 100E, and 100F in order from the left. The frames 100A and 100B are arranged so as to be aligned with the frames 100D and 100E in the front-rear direction. The frames 100A to 100F have the same shape and the same size.

  As shown in FIG. 3B, each frame 100 includes a ceiling wall 120, a front side wall 130, a left side wall 140, a right side wall 150, and a rear side wall 160. The ceiling wall 120 is a rectangular wall along both the front-rear direction and the left-right direction. The front side wall 130 and the rear side wall 160 are rectangular walls along both the vertical direction and the horizontal direction. The left side wall 140 and the right side wall 150 are rectangular walls along both the vertical direction and the front-rear direction. Two frames 100 adjacent in the left-right direction are connected to each other at one left side wall 140 and the other right side wall 150. Two frame bodies 100 adjacent to each other in the front-rear direction are connected to each other at one front side wall 130 and the other rear side wall 160. In the present embodiment, as will be described later, the members constituting the connecting portion of two adjacent frame bodies 100 are shared by these two frame bodies 100. Each frame 100 is formed with an internal space surrounded by the ceiling wall 120 and each side wall. This internal space is a space defined in a rectangular parallelepiped shape by the ceiling wall 120 and each side wall.

  Hereinafter, a specific structure of the frame 100 will be described. As shown in FIGS. 4 and 5, the front side wall 130 of each frame 100 has two vertical members 131 (first vertical bar member, second vertical bar member) extending linearly along the vertical direction, and A cable 171 (first cable member, third cable member) and a wire mesh 172 (first mesh member, first cable) stretched along the front side wall 130 so as to connect the vertical intermediate member 132 and the two vertical members 131. 3 mesh members).

  The two vertical members 131 define opposite sides of the front side wall 130 in the left-right direction. Each vertical member 131 is a cylindrical steel pipe having a mortar filling portion and a metal rod pipe therein. The lower part of the vertical member 131 is fixed by being buried in the ground. A plurality of ring-shaped cable guides 131a (see FIG. 10) are arranged at equal intervals in the vertical direction at both ends of the vertical member 131 in the longitudinal direction. Each cable guide 131a protrudes from the outer surface of the vertical member 131 in the front-rear direction, and a cable 171 is passed therethrough. A plurality of ring-shaped cable guides 131b (see FIG. 10) are arranged at equal intervals in the vertical direction at both ends of the vertical member 131 in the horizontal direction. The cable guide 131b protrudes from the outer surface of the vertical member 131 in the left-right direction, and the cable 171 is passed therethrough. The vertical intermediate member 132 is a cylindrical steel pipe having a mortar filling portion and a metal rod tube therein, and is disposed in the middle of the two vertical members 131 in the left-right direction. The lower part of the vertical intermediate member 132 is buried and fixed in the ground. A plurality of ring-shaped cable guides 132a are arranged at equal intervals in the vertical direction at both ends of the vertical intermediate member 132 in the front-rear direction. The cable guide 132a protrudes from the outer surface of the vertical intermediate member 132 in the front-rear direction, and the cable 171 is passed therethrough. By providing the vertical intermediate member 132, the front side wall 130 is reinforced.

  The cable 171 is a steel cord member in which a plurality of steel strands are wound together. The cable 171 is fixed to the longitudinal member 131 and the longitudinal intermediate member 132 so as to connect each cable guide 131a of the longitudinal member 131 positioned at the left end of the front side wall 130 to each cable guide 132a of the longitudinal intermediate member 132. The cable 171 is fixed to the longitudinal member 131 and the longitudinal intermediate member 132 so as to connect the cable guides 131a of the longitudinal member 131 located at the right end of the front side wall 130 to the cable guides 132a of the longitudinal intermediate member 132. . Thus, the cable 171 is stretched so as to connect the two vertical members 131 with the vertical intermediate member 132 interposed therebetween. The cable 171 is looped around the vertical member 131 and the vertical intermediate member 132. The wire mesh 172 is coupled to the cable 171 by a metal coil 173. The wire mesh 172 is stretched across the plurality of frames 100. For example, in FIG. 4, the leftmost vertical member 131 is stretched to the rightmost vertical member 131. Thereby, the metal mesh 172 is stretched across the front side walls 130 of both the frame body 100A and the frame body 100B. In each of the frames 100A to 100F, the wire mesh 172 is along the front side wall 130 so as to connect the two vertical members 131.

  Since the rear side wall 160 of each frame 100 has the same structure as the front side wall 130, description thereof is omitted. In addition, in the two frame bodies 100A and 100D adjacent to each other in the front and rear, the members constituting the front side wall 130 and the rear side wall 160 are shared at the connecting portions. That is, the vertical member 131, the vertical intermediate member 132, the cable 171 and the wire mesh 172 constituting the rear side wall 160 of the frame 100A are the vertical member 131, the vertical intermediate member 132, the cable 171 and the wire 172 constituting the front side wall 130 of the frame 100D. It is also a wire mesh 172. The same applies to the frames 100B and 100E adjacent to each other in the front-rear direction.

  As shown in FIGS. 6 and 7, the right side wall 150 of each frame 100 has two vertical members 131 (first vertical bar member, second vertical bar member) extending linearly along the vertical direction, and Cable spacing member 151, cable 171 (first rope member, third rope member) and wire mesh 172 (first mesh member,) stretched along right side wall 150 so as to connect two vertical members 131 A third net member). The right side wall 150 has the same structure as the front side wall 130 in many respects. Therefore, in the following, a structure different from the front side wall 130 will be mainly described, and description of the same structure as the front side wall 130 will be omitted as appropriate.

  The two vertical members 131 of the right side wall 150 define opposite sides of the right side wall 150 in the front-rear direction. In the frames 100C to 100F, the underground portions of the two vertical members 131 included in the right side wall 150 are set to have different lengths. Specifically, each of the two vertical members 131 is fixed by being embedded in the ground so that the underground part of the rear part arranged in the rear is longer than the underground part of the part arranged in the front. . The cable 171 has two vertical members 131 and a cable interval holding so as to connect one cable guide 131b of the two vertical members 131 to the other cable guide 131b via the cable interval holding member 151. It is fixed to the material 151. Accordingly, the cable 171 is stretched so as to connect the two vertical members 131. The cable 171 is looped around the vertical member 131 and the cable interval holding member 151. The cable spacing member 151 is a metal plate-like member, and is arranged in the middle of the two vertical members 131 in the left-right direction. The cable interval holding member 151 plays a role of holding the cables 171 at equal intervals in the vertical direction. On the other hand, the cable spacing member 151 is lower in strength than the longitudinal intermediate member 132 and is not buried in the ground. That is, the effect of reinforcing the right side wall 150 by the cable spacing member 151 is lower than the effect of reinforcing the front side wall 130 by the vertical intermediate member 132. This is because the collision energy that is expected to be received from the debris flow by the right side wall 150 provided with the cable spacing holding member 151 is the energy of the collision that is expected to be received from the debris flow by the front side wall 130 provided with the longitudinal intermediate member 132. This is because it is smaller. As described above, which of the vertical intermediate member 132 and the cable spacing member 151 is provided on the side wall may be determined based on the magnitude of the collision energy that the side wall is expected to receive from the debris flow. For example, when the energy of the debris flow collision from the right is expected to be larger than the energy of the debris flow collision from the front, the vertical intermediate member 132 may be provided on the right wall 150. The wire mesh 172 is coupled to the cable 171 by a metal coil 173. In FIG. 6, the wire mesh 172 is stretched from the leftmost vertical member 131 to the rightmost vertical member 131. Thereby, the metal mesh 172 is stretched across the right side wall 150 of both the frame 100B and the frame 100E. In each frame 100 of the frames 100A to 100F, the wire mesh 172 extends along the right side wall 150 so as to connect the two vertical members 131.

  Since the left side wall 140 of each frame 100 has the same structure as the right side wall 150, description thereof is omitted. In addition, in the two frame bodies 100A and 100B adjacent to each other on the left and right, the members constituting the left side wall 140 and the right side wall 150 are shared by the mutual connecting portions. That is, the vertical member 131, the cable interval holding member 151, the cable 171 and the wire mesh 172 constituting the right side wall 150 of the frame 100A are the vertical member 131, the cable interval holding member 151, and the cable constituting the left side wall 140 of the frame 100B. 171 and wire mesh 172. The same applies to the two frames 100C and 100D adjacent to each other on the left and right, the frames 100D and 100E, and the frames 100E and 100F. As shown in FIG. 8, neither the cable 171 nor the wire mesh 172 is stretched between the two longitudinal intermediate members 132 adjacent in the front-rear direction.

  As shown in FIG. 2, the ceiling wall 120 of each frame 100 has two horizontal members 121 (first horizontal bar member and second horizontal bar member) extending linearly along the left-right direction, The two cross members 122 (the first cross bar member and the second cross bar member) and the cross intermediate member 123 extending linearly along the two cross members 121 and between the two cross members 122. A cable 171 (second rope member, fourth rope member) and a wire mesh 172 (second mesh member, fourth mesh member) stretched along the ceiling wall 120 so as to be connected are provided.

  The two cross members 121 define opposite sides of the ceiling wall 120 in the front-rear direction. The two cross members 122 define opposite sides of the ceiling wall 120 in the left-right direction. The cross members 121 and 122 are cylindrical steel pipes each having a mortar filling portion and a metal rod pipe therein. A plurality of ring-shaped cable guides 121a are arranged at equal intervals in the left-right direction at both ends of the cross member 121 in the up-down direction. The cable guide 121a protrudes in the vertical direction from the outer surface of the cross member 121, and the cable 171 is passed therethrough. A plurality of ring-shaped cable guides 122a are arranged at equal intervals in the front-rear direction at both ends of the cross member 122 in the up-down direction. The cable guide 122a protrudes in the vertical direction from the outer surface of the cross member 122, and the cable 171 is passed therethrough. The transverse intermediate member 123 is a cylindrical steel pipe having a mortar filling portion and a metal rod tube therein, and is disposed between the two transverse members 122 in the left-right direction. A plurality of ring-shaped cable guides 123a are arranged at equal intervals in the front-rear direction at both ends of the horizontal intermediate member 123 in the vertical direction. The cable guide 123a protrudes from the outer surface of the horizontal intermediate member 123 in the vertical direction, and the cable 171 is passed therethrough.

  The cable 171 is fixed to the two cross members 121 so as to connect from one of the two cable members 121 to one of the other cable guides 121a. Accordingly, the cable 171 is stretched so as to connect the two cross members 121. The cable 171 is looped around the two cross members 121. Further, the cable 171 is fixed to the cross member 122 and the cross intermediate member 123 so as to connect each cable guide 122a of the cross member 122 located at the left end of the ceiling wall 120 to each cable guide 123a of the cross intermediate member 123. . Further, the cable 171 is fixed to the cross member 122 and the cross intermediate member 123 so as to connect the cable guides 122a of the cross member 122 located at the right end of the ceiling wall 120 to the cable guides 123a of the cross intermediate member 123. . Accordingly, the cable 171 is stretched so as to connect the two cross members 122. The cable 171 is looped around the cross member 122 and the cross intermediate member 123. The wire mesh 172 is coupled to the cable 171 by a metal coil 173. As shown in FIG. 2, the wire mesh 172 is stretched from the leftmost cross member 122 of the frame 100A to the rightmost cross member 122 of the frame 100B. Also, the leftmost cross member 122 of the frame 100C is stretched to the rightmost cross member 122 of the frame 100F. Thereby, the metal mesh 172 is stretched across the ceiling walls 120 of both the frame body 100A and the frame body 100B, and is stretched across all the ceiling walls 120 of the frame body 100C to the frame body 100F. In each frame 100, the wire mesh 172 is along the ceiling wall 120 so as to connect the two cross members 121 and the two cross members 122.

  As shown in FIGS. 4 and 5, the cross member 121 is fixed to the upper ends of the vertical member 131 and the vertical intermediate member 132 through a cap member 181 and a coupling member 182, respectively. Details of this fixing structure are as shown in FIG. 9 and FIG. The cap member 181 includes a disk portion 181a fixed to the upper end of the vertical member 131 or the vertical intermediate member 132, and a protruding portion 181b protruding upward from the disk portion 181a. The projecting portion 181b is formed with an insertion hole 181c penetrating the projecting portion 181b in the left-right direction.

  The coupling member 182 is a cylindrical member extending in the left-right direction. The front end 182a of the coupling member 182 is formed in a hemispherical shape. A slit 182b is formed on the side wall of the coupling member 182 so as to extend to the end opposite to the tip 182a along the left-right direction. Bolt fixing ribs 182c are formed above and below the slit 182b. The front end 182 a of the coupling member 182 is inserted into the insertion hole 181 c of the cap member 181. As shown on the right side of FIG. 9, two coupling members 182 are inserted into the cap member 181 from the left and right sides, or as shown on the left side of FIG. 9, one coupling member 182 is either the left or right side. Inserted from one side. In the former, the tip portions 182a of the two coupling members 182 are fixed to each other by bolts and nuts. In the latter, the front end 182a of the coupling member 182 is fixed to the fixing plate 184 (see FIG. 10) fitted in the insertion hole 181c from the side opposite to the coupling member 182 by bolts 185 and nuts. Further, a cross member 121 is inserted into the coupling member 182 from the end opposite to the front end 182a. In this state, the flange 182c is tightened by the bolt 183 and the nut so as to close the gap of the slit 182b, so that the coupling member 182 sandwiches the cross member 121 from above and below.

  As shown in FIGS. 6 and 7, the cross member 122 is fixed to the vicinity of the upper end of the vertical member 131 through a bracket member 186 and a coupling member 182. Details of this fixing structure are as shown in FIG. 9 and FIG. The bracket member 186 is a U-shaped plate-like member, and is formed with a cylindrical portion 186a that protrudes to one side in the front-rear direction. The bracket member 186 is fixed to the vertical member 131 by two U-shaped bolts 187 and nuts. The front end 182a of the coupling member 182 is pressed against the cylindrical portion 186a of the bracket member 186 from one side in the front-rear direction, and the front end 182a is fixed to the bracket member 186 by a bolt 188 and a nut. The cross member 122 is inserted into the coupling member 182 from the end opposite to the tip end 182a. Similarly to the above, the flange 182c is tightened by the bolt 183 and the nut, whereby the coupling member 182 is The cross member 122 is sandwiched from above and below.

  As shown in FIG. 8, the horizontal intermediate member 123 is fixed near the upper end of the vertical intermediate member 132 through the bracket member 186 and the coupling member 182. The fixing structure of the transverse intermediate member 123 with respect to the longitudinal intermediate member 132 is the same as the fixing structure of the transverse member 122 with respect to the longitudinal member 131.

  Hereinafter, the installation method of the frame structure 1 is demonstrated. As shown in FIG. 1 and FIG. 2, the frame structure 1 is installed such that water from the water flows down toward the frame structure 1 from the front. Therefore, when a debris flow toward the frame structure 1 occurs from the front, the frame structure 1 receives the debris flow from the front side where the frames 100A and 100B are installed. The frame structure 1 is installed on the ground surface so that the frame 100E (first frame) straddles the inflow port e1 of the drainage channel E as shown in FIGS. “The frame 100 straddles the inflow port e1” means that the frame 100 is disposed so that the inflow port e1 is disposed in the frame 100 as viewed from above, as shown in FIG. . As shown in FIG. 6, the end of the drainage channel E protrudes obliquely upward from the ground to the ground toward the inside space of the frame 100E. The inflow port e1 of the drainage channel E is disposed in the internal space of the frame body 100E. This mode is an example of a mode in which “the frame body 100 straddles the inflow port e1”. Note that the inlet is disposed in the frame 100 as viewed from above, but the outlet of the drainage channel is exposed to the ground below the internal space of the frame 100 (below the front side wall 130, the right side wall 150, etc.). This is another example of the aspect that “the frame body 100 straddles the inflow port e1”.

  According to the present embodiment described above, the wall is not installed only in front of the debris flow, but the four side walls of the front side wall 130, the left side wall 140, the right side wall 150, and the rear side wall 160, and the ceiling wall 120. The frame body 100 </ b> E is installed so as to straddle the inflow port e <b> 1. Each wall includes two vertical members 131 and a cable 171 and a wire mesh 172 which are stretched so as to connect them. The debris flow that has reached the frame structure 1 does not necessarily come from only the front toward the frame body 100E. The debris flow circulates to the left and right of the frame structure 1 or circulates above the frame structure 1 and then the frame body 100E. There is a risk of trying to flow into. On the other hand, even if the debris flow from each direction toward the frame body 100E reaches the frame body 100E, the ceiling wall 120, the front side wall 130, the left side wall 140, the right side wall 150, and the like surrounding the internal space of the frame body 100E. The rear side wall 160 is received by the cable 171 and the wire mesh 172. Therefore, the inside of the frame 100E is protected against debris flow from either the vertical direction or the horizontal direction. Therefore, it is possible to effectively suppress the debris flow from reaching the inflow port e1 by installing the frame body 100E so as to straddle the inflow port e1. As a result, the debris flow is suppressed from blocking the inflow port e1, and therefore, the occurrence of serious flood damage such as the accumulated water causing collapse of the road embankment is suppressed.

  In the present embodiment, the frames 100A to 100D and 100F (second frame) are connected to the frame 100E from the front and left and right. Therefore, the debris flow that tries to approach the frame 100E from the front and left and right sides is first received by the cable 171 and the wire mesh 172 on the ceiling wall 120 and the side walls of the frames 100A to 100D and 100F. In particular, the frames 100B, 100D, and 100F are connected to the front side wall 130, the left side wall 140, and the right side wall 150 of the frame 100E. That is, the frames 100D and 100F are connected to both sides of the frame 100E in the left-right direction. These frame bodies 100 sandwich the frame body 100E from both sides. A frame 100B is connected to the front of the frame 100E. The frames 100B, 100D, and 100F receive the debris flow coming from the three sides of the frame 100E toward the frame 100E. Therefore, it is possible to more effectively suppress the debris flow from reaching the inlet e1 in the frame 100E.

  Moreover, in this embodiment, the member which forms a side wall with the mutually adjacent two frame bodies 100 is mutually shared. For example, the vertical member 131, the vertical intermediate member 132, the cable 171 and the wire mesh 172 that constitute the rear side wall 160 of the frame 100A are the vertical member 131, the vertical intermediate member 132, the cable 171 and the wire 172 that constitute the front side wall 130D of the frame 100D. It is also a wire mesh 172. As described above, since the members forming the side wall are shared by the two frame bodies 100 adjacent to each other, the frame structure 1 can be formed with a small number of members. Furthermore, since the frames 100 have the same shape and size, the members forming the frame 100 can be easily shared. All of the frames 100A to 100F have a common configuration of the ceiling wall 120, the front side wall 130, the left side wall 140, the right side wall 150, and the rear side wall 160, and are configured by the same members. When the members are made common in this way, the productivity of the frame 100 is improved.

<Modification>
The above is a description of a preferred embodiment of the present invention, but the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope described in the means for solving the problem. It is possible.

  For example, in the above-described embodiment, the frame structure 1 is installed such that the frame 100E straddles the water inlet e1 of the drainage channel E. However, as shown in FIG. 11, the frame structure 1 may be installed such that any of the frames 100 (for example, the frame 100E) straddles the outlet e2 'of the drainage channel E'. The drainage channel E ′ protrudes from the slope of the road R ′ to the side thereof. The water inlet e1 'of the drainage channel E' is disposed in the ground. Thereby, underground water flows into the drainage channel E 'from the inflow port e1', and is discharged from the outflow port e2 'to the side of the road R'. An end portion of the drainage channel E ′ on the outlet e2 ′ side passes through the rear side wall 160 of the frame 100, and the outlet e2 ′ is disposed in the internal space of the frame 100. As described above, the debris flow is prevented from reaching the outlet e2 ′ by installing the frame structure 1 so that the frame 100 straddles the outlet e2 ′ of the drainage channel E ′. it can. Therefore, the occurrence of water damage due to the debris flow blocking the outlet e2 'is suppressed.

  Moreover, in the above-mentioned embodiment and modification, it is assumed that the frame structure 1 is used in order to protect the inflow port and the outflow port of the drainage channel which are artificial facilities. However, the frame structure 1 may be used to protect the water inlet or outlet in a natural river or river. In this case, the frame structure 1 should just be installed so that one of the frame bodies 100 (for example, frame body 100E) may straddle the inflow port or the outflow port of water.

  Moreover, in the above-mentioned embodiment, the frame structure 1 comprised from the six frame bodies 100 of the frame bodies 100A-100F is used for protection of the inflow port e1. However, as shown in FIG. 12A, the frame structure 2 constituted by the four frames 100 may be used for protecting the inflow port e1. The frame structure 2 is arranged so that water from the river flows down from the front toward the frame structure 2. The four frame bodies 100 are connected to each other so that the side walls are shared between the adjacent frame bodies 100 as in the above-described embodiment. One of the four frame bodies 100 is arranged at the front part of the frame structure 2, and the remaining three are arranged in the left-right direction at the rear part of the frame structure 2. Of the three rear parts, the central frame 100 is arranged behind the front frame 100 so as to straddle the inflow port e1. The frame body 100 at the center of the rear portion straddling the inflow port e1 corresponds to the first frame body in the present invention. The other frame body 100 connected to the three side walls of the frame body 100 corresponds to the second frame body in the present invention. Even if the debris flow coming from the front toward the frame structure 2 tries to come to the inflow port e1 from the front and left and right sides, it is first received by the front frame 100 and the frames 100 on both sides of the rear. It is done. Even if the debris flow reaches the frame 100 at the center of the rear part, it is received by the ceiling wall 120 and the side walls that surround the internal space of the frame 100.

  Moreover, as shown in FIG.12 (b), the frame structure 3 comprised from the two frame bodies 100 may be used for protection of the inflow port e1. The frame structure 3 is arranged such that water from the river flows down from the front toward the frame structure 3. Similar to the above-described embodiment, the two frame bodies 100 are connected to each other in the front-rear direction so that the side walls are shared by the adjacent frame bodies 100. The rear frame 100 straddling the inflow port e1 corresponds to the first frame in the present invention. The front frame 100 corresponds to the second frame in the present invention. The debris flow from the front toward the inflow port e1 is first received by the front frame 100. Even if the debris flow reaches the rear frame 100, the debris flow is received by the ceiling wall 120 and each side wall surrounding the internal space of the frame 100.

  Moreover, as shown in FIG.12 (c), the frame structure 4 comprised from the three frames 100 may be used for protection of the inflow port e1. The frame structure 4 is arranged such that water from the river flows down from the front toward the frame structure 4. The three frame bodies 100 are connected to each other on the left and right sides so that the side walls are shared between the adjacent frame bodies 100 as in the above-described embodiment. The central frame 100 straddling the inflow port e1 corresponds to the first frame in the present invention. Two frames 100 on both sides sandwiching the central frame 100 correspond to the second frame in the present invention. Even if the debris flow tries to come from the left and right toward the inlet e1, it is first received by the frame 100 on both sides. Even if the debris flow reaches the central frame 100, it is received by the ceiling wall 120 and the side walls that surround the internal space of the frame 100. The three frame bodies 100 may be connected in the front-rear direction, and the center frame body 100 or the rear frame body 100 may be installed so as to straddle the inflow port e1.

  Also, as shown in the frame structure 5 in FIG. 12D, a frame body 200 (second frame body) that includes the internal space of the frame body 100 (first frame body) straddling the inflow port e1 is installed. May be. The frame body 200 has a schematic shape of a prism, more specifically, a rectangular parallelepiped shape, and includes a ceiling wall, a front side wall 230, a left side wall 240, a right side wall 250, and a rear side wall 260. Each of these side walls includes two vertical members 131 extending linearly in the vertical direction, and a cable 171 and a wire mesh stretched along the side walls so as to connect the two vertical members 131. 172 and is configured similarly to the front side wall 130 and the like. The rear side wall 260 is integrally formed with a part of the rear side wall 160 of the frame body 100. The ceiling wall also has two cross members that extend linearly along the left-right direction, two cross members that extend linearly along the front-rear direction, and a ceiling wall that connects these cross members. It has a cable 171 and a wire mesh 172 stretched along, and is configured in the same manner as the ceiling wall 120. The debris flow coming from the front toward the frame structure 5 is first received by the frame 200 even if it is going from the front and left and right sides to the inflow port e1. Even if the debris flow reaches the frame body 100, the debris flow is received by the ceiling wall 120 and each side wall surrounding the internal space of the frame body 100. Therefore, it is possible to effectively suppress the debris flow from reaching the inflow port e1.

  Moreover, as shown in FIG.12 (e), the frame structure 6 which consists of the triangular prism-shaped three frames 300 may be used for protection of the inflow port e1. The frame structure 6 is arranged so that water from the river flows down from the front toward the frame structure 6. The frame 300 has side walls 330, 340, and 350 configured in the same manner as the front side wall 130 and the like. The ceiling wall of the frame 300 is formed along the ceiling wall so as to connect the three cross members fixed to the upper portions of the side walls 330, 340 and 350 so as to define three sides of the triangle, and the three cross members. A tensioned cable 171 and a wire mesh 172 are provided. The three frame bodies 300 are connected to each other on the left and right sides so that the side walls are shared between the adjacent frame bodies 300 as in the above-described embodiment. The central frame 300 straddling the inflow port e1 corresponds to the first frame in the present invention. The two frame bodies 300 on both sides sandwiching the central frame body 300 correspond to the second frame body in the present invention. Even if the debris flow tries to come from the left and right toward the inlet e1, it is first received by the frame 300 on both sides. And even if the debris flow reaches the central frame 300, it is received by the ceiling wall and each side wall surrounding the internal space of the frame 300.

  In the above-described embodiment and the modified examples of FIGS. 12A to 12C and FIG. 12E, a plurality of frames 100 or 300 having the same size and shape are connected to each other. A frame structure is constructed. However, some frames may have different sizes and shapes from other frames. For example, when a load from one direction is predicted to be larger than a load from the other direction, the frame body facing the one direction may be made larger than the other frame body.

  Moreover, in the above-mentioned embodiment, although the frame 100 is provided with the ceiling wall 120, the ceiling wall 120 does not need to be provided. Also in this case, the debris flow coming from the front, rear, left and right toward the frame 100 is received by the front side wall 130, the left side wall 140, the right side wall 150, and the rear side wall 160. Further, instead of the cable 171 and the wire mesh 172, a rope or mesh material made of a highly durable resin material or the like may be used.

  Further, the structure in which the vertical members 131, the cables 171, and the wire mesh 172 are combined on each side wall such as the front side wall 130 is not limited to the above-described embodiment. For example, in the above-described embodiment, the cable 171 is looped around the vertical member 131 and the vertical intermediate member 132. However, the cable 171 may not be an endless loop, but may be provided in such a manner that one of both ends is fixed to the vertical member 131 and the other is fixed to the vertical intermediate member 132.

E, E 'Drainage channel 1-6 Frame structure e1, e1' Inlet e2, e2 'Outlet 100, 100A-100F, 200, 300 Frame 120 Ceiling wall 121, 122 Cross member 130, 230 Front side wall 131 Vertical Material 140, 240 Left side wall 150, 250 Right side wall 160, 260 Rear side wall 171 Cable 172 Wire mesh 330, 340, 350 Side wall

Claims (9)

A frame structure including a first frame body defined in a prismatic shape by three or more side walls,
Each side wall of the first frame is
A plurality of first ropes stretched along each side wall so as to connect between the two first vertical bar members defining the opposite sides of the side walls in the lateral direction and the two first vertical bar members A member and a first net member stretched along each side wall so as to connect between the two first vertical bar members;
A frame structure characterized in that the first frame body is installed so as to straddle a water distribution port in a flow path for forestry, flood control or road drainage. The first frame is defined in a prismatic shape by a ceiling wall in addition to the three or more side walls;
The ceiling wall of the first frame is
Two first horizontal bar members defining two sides of the ceiling wall, and a plurality of second rope members stretched along the ceiling wall so as to connect the two first horizontal bar members; The frame structure according to claim 1, further comprising: a second net member stretched along the ceiling wall so as to connect the two first horizontal bar members. A second frame defined in a prism shape by three or more side walls and a ceiling wall;
Each side wall of the second frame is
A plurality of third ropes stretched along each side wall so as to connect the two second vertical bar members defining the opposite sides of each side wall in the lateral direction and the two second vertical bar members A member and a third net member stretched along each side wall so as to connect the two second vertical bar members;
The ceiling wall of the second frame is
Two second horizontal bar members defining two sides of the ceiling wall, and a plurality of fourth rope members stretched along the ceiling wall so as to connect the two second horizontal bar members; A fourth mesh member stretched along the ceiling wall so as to connect the two second horizontal bar members;
The frame structure according to claim 1 or 2, wherein the first frame body and the second frame body are connected to each other at one side wall.   The frame structure according to claim 3, wherein the two second frames are connected to the first frame so as to sandwich the first frame. The first frame has a quadrangular prism shape;
5. The frame structure according to claim 4, wherein at least three of the second frame bodies are connected to the first frame bodies on the side walls of the different first frame bodies.   The frame structure according to any one of claims 3 to 5, wherein members forming the respective side walls are shared with each other at a connecting portion between the first frame and the second frame. .   The frame structure according to any one of claims 3 to 6, wherein the first frame body and the second frame body are prismatic shapes having the same shape and size. A second frame defined in a prism shape by three or more side walls and a ceiling wall;
Each side wall of the second frame is
A plurality of third ropes stretched along each side wall so as to connect the two second vertical bar members defining the opposite sides of each side wall in the lateral direction and the two second vertical bar members A member and a third net member stretched along each side wall so as to connect the two second vertical bar members;
The ceiling wall of the second frame is
Two second horizontal bar members defining two sides of the ceiling wall, and a plurality of fourth rope members stretched along the ceiling wall so as to connect the two second horizontal bar members; A fourth mesh member stretched along the ceiling wall so as to connect the two second horizontal bar members;
The frame structure according to claim 1 or 2, wherein a second frame is installed so as to include an internal space defined by the first frame. An installation method of a frame structure including a first frame body defined in a prismatic shape by three or more side walls,
Each side wall of the first frame is
A plurality of first ropes stretched along each side wall so as to connect between the two first vertical bar members defining the opposite sides of the side walls in the lateral direction and the two first vertical bar members A member and a first net member stretched along each side wall so as to connect between the two first vertical bar members;
An installation method for a frame structure, wherein the first frame body is installed so as to straddle a water distribution port in a flow path for forestry, flood control or road drainage.

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