JP2020169451A - Cage frame structure and restoration method of banking using therewith - Google Patents

Abstract

To provide a cage frame structure allowing performing final restoration without performing temporary restoration, allowing post-construction of drain pipes and reinforcements, and allowing easy and sure restoration of banking in a short period, and a restoration method of the banking using therewith.SOLUTION: A cage frame structure 10 has multiple cage frames including at least one pipe-storing cage frame storing pipes. The pipe-storing cage frame has, on a front surface and a rear surface, pipe-passing panels allowing formation of pipe-passing holes allowing passing of pipes. The pipe-passing panel is formed by the combination of a first part having a first opening with a second part having a pipe-passing hole forming part allowing formation of the pipe-passing hole. The pipe-passing hole formation part is positioned in contact with a top end of the second part in an upright attitude. The second part is combined, in the upright attitude, with one side of the first part of the front surface or the rear surface of the pipe-storing cage frame, and the second part is combined, in an inverted attitude, with the other side of the first part. The pipe-passing hole can be formed to be different in the vertical positions in the front surface and the rear surface of the pipe-storing case frame.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a car frame structure and a method for restoring an embankment using the same.

Traditionally, railroad tracks, that is, embankments constructed by raising earth and sand on the ground in order to pass the tracks higher than the ground, have been widely used, but the embankments collapsed on a large scale due to heavy rains and earthquakes. In that case, early restoration is important, so a temporary restoration will be carried out by stacking large embankments to quickly secure a cross section, thereby resuming train operation. After that, after constructing a temporary earth retaining work, the large sandbags are removed and the main restoration is carried out by embankment (see, for example, Non-Patent Document 1).

Yamamura, Gokaichi, Kawanakajima, Fujiwara, "Damage caused by heavy rain in the Tohoku region in August 2013 and recovery measures (Tazawako Line / Hanawa Line)", SED, No. 43, pp. 64-71, JR East Structural Technology Center, 2014.5

However, in the above-mentioned conventional technique, after constructing a large sandbag which is a temporary structure, constructing a temporary sandbag, and removing the large sandbag as a temporary restoration, the embankment which is a main structure is constructed as a main restoration. Therefore, the construction procedure becomes complicated. In addition, the area where the embankment is damaged may be a weak point due to topographical factors, etc., and there is a concern that it will be repeatedly damaged.Therefore, in many cases, improvement of rainfall resistance and earthquake resistance is attempted. Measures for the construction of drainage pipes and reinforcing materials are taken when performing this restoration, but the design and construction of these measures takes time, and the restoration work takes a long time. For example, the drainage pipe should be tilted so that the deep underground end is raised for drainage, and the reinforcing material is the deep underground end to prevent spillage of the mortar when filling the inside. It is desirable to incline the drainage pipe and the reinforcing material so as to be low, but it takes time to design and construct the inclination of the drainage pipe and the reinforcing material.

Here, the problems of the conventional technique can be solved, the main restoration can be performed without performing the temporary restoration, the drainage pipe and the reinforcing material can be post-constructed, and the drainage pipe and the reinforcing material can be installed easily, in a short period of time, and easily. An object of the present invention is to provide a cage frame structure capable of reliably restoring the embankment and a method for restoring the embankment using the cage frame structure.

Therefore, the car frame structure is a car frame structure including a plurality of car frames including at least one pipe accommodating car frame for accommodating pipes, and the pipe accommodating car frame allows the pipe to pass through. A pipe passage panel capable of forming a pipe passage hole is provided on the front surface and a back surface, and the pipe passage panel has a first portion having a first opening and a pipe passage hole forming portion capable of forming the pipe passage hole. The pipe passage hole forming portion is formed by combining the two portions, and is located in contact with the upper end of the second portion in an upright posture, and the second portion is located on one of the front or back surfaces of the pipe accommodating car frame. The parts are combined in an upright position, and the second part is combined in an inverted position with the other first part to form the pipe passage hole so that the front and back of the pipe accommodating car frame are positioned differently in the vertical direction. It is possible.

In the other car frame structure, the second portion is further formed by combining a large mesh having a large diameter wire and a small mesh having a small diameter wire, and the pipe passage hole forming portion is formed by combining the large mesh and the small mesh having the small diameter wire. It is one of the large meshes whose perimeter is defined by the large diameter wire and is closed by the small meshes.

In still another car frame structure, the pipe passage hole forming portion is the largest of the large meshes.

In still another car frame structure, the pipe passage hole is further formed by cutting out a part of the mesh mesh of the pipe passage hole forming portion.

In still another car frame structure, the pipe is further housed in the pipe housing car frame in an inclined posture so that the front and back surfaces of the pipe housing car frame are positioned differently in the vertical direction.

In yet another car frame structure, the car frame can be filled with ground material and can be stacked in a plurality of stages.

In yet another car frame structure, the pipe further prevents the inflow of the ground material and secures a space through which the insertion member inserted into the ground can pass.

The method of restoring the filling is a method of restoring the filling by stacking a plurality of car frames along the stepped portion of the stepped filling to construct a car frame structure. The pipe accommodating cage contains at least one pipe accommodating cage, which has pipe passage panels on the front and back capable of forming pipe passage holes through which the pipe can pass. , The first portion having the first opening and the second portion having the pipe passage hole forming portion capable of forming the pipe passage hole are combined and formed, and the pipe passage hole forming portion is the second in an upright posture. Located in contact with the upper end of the portion, the second portion is combined in an upright position with the first portion of one of the front or back of the pipe accommodating cage frame, and the second portion is combined in an inverted posture with the other first portion. Therefore, the pipe passage hole can be formed so that the positions in the vertical direction are different between the front surface and the back surface of the pipe accommodating car frame.

According to the present disclosure, the main restoration can be performed without performing the temporary restoration, the drainage pipe and the reinforcing material can be post-constructed, and the embankment can be restored easily and surely in a short period of time. it can.

It is a conceptual diagram which shows the restoration method of the embankment using the car frame structure in this embodiment. It is a conceptual diagram which shows the embankment restored by using the car frame structure in this embodiment. It is a photograph which shows the car frame structure under construction in this embodiment. It is a conceptual diagram which shows the general reinforcing material which was constructed. It is a conceptual diagram which shows the general drainage pipe which was constructed. It is a perspective view which shows the structure of the car frame structure in this embodiment. It is a figure which shows another example of the front-rear part net plate of the 2nd car frame in this embodiment. It is a figure which shows the 1st example of the front-rear part net plate for tilting the hole-retaining pipe of the 2nd car frame in this embodiment. It is a figure which shows the 2nd example of the front-rear part net plate for tilting the hole-retaining pipe of the 2nd car frame in this embodiment. It is a figure which shows the example of the 2nd car frame in which the inclined hole-retaining tube in this embodiment is housed in the 2nd internal space.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.

FIG. 1 is a conceptual diagram showing a method of restoring an embankment using a car frame structure in the present embodiment, and FIG. 2 is a conceptual diagram showing an embankment restored using a car frame structure in the present embodiment. Is a photograph showing a car frame structure under construction in the present embodiment, FIG. 4 is a conceptual diagram showing a general reinforcing material constructed, and FIG. 5 is a conceptual diagram showing a general drainage pipe constructed. .. In FIG. 1, (a) is a diagram showing a collapsed embankment, (b-1) to (b-3) are diagrams showing each process of embankment restoration by the conventional technique, (c-1) to (c-1). c-3) is a diagram showing each step of embankment restoration in the present embodiment.

In the figure, reference numeral 31 denotes an embankment as the ground constructed on the original ground 32. The embankment 31 extends in a direction perpendicular to the screen of FIG. 1, and may be used, for example, to support a road or as a river embankment. It may be used for any purpose, but here, for convenience of explanation, it is assumed that it is used to support a railroad track, that is, a track.

FIG. 1A shows a state in which a part of the embankment 31 including the slope 33 has collapsed due to heavy rain or an earthquake. In the conventional technique described in the section of "background technique", the collapsed embankment 31 is restored as shown in FIGS. 1 (b-1) to (b-3). That is, first, as shown in FIG. 1 (b-1), sandbags 34 are stacked to secure a cross section of the embankment 31. Subsequently, as shown in FIG. 1 (b-2), a temporary earth retaining 36 is constructed and the sandbag 34 is removed. This completes the temporary restoration. Next, as shown in FIG. 1 (b-3), the embankment 31 is reconstructed and the slope 33 is also formed. This completes this restoration.

On the other hand, in the present embodiment, the collapsed embankment 31 is restored as shown in FIGS. 1 (c-1) to 1 (c-3). That is, first, as shown in FIG. 1 (c-1), step cutting work is performed in which the embankment 31 is cut in a stepped manner. Subsequently, as shown in FIG. 1 (c-2), the car frame structure 10 is constructed along the stepped portion of the stepped embankment 31, and the ground such as crushed stone is constructed in the car frame structure 10. Carry out a basket to fill the material. This completes this restoration. After that, as shown in FIG. 1 (c-3), the insertion member 40 is inserted into the embankment 31 as the ground through the cage frame structure 10. As a result, drainage and earthquake resistance can be further improved.

In the present embodiment, the expressions indicating the directions of upper, lower, left, right, front, rear, etc. used to explain the configuration and operation of each part of the car frame structure 10 and other members are used. It is not absolute but relative, and is appropriate when each part of the car frame structure 10 and other members are in the posture shown in the figure, but when the posture is changed, the posture is changed. It should be changed and interpreted as it changes.

As shown in FIG. 2, the car frame structure 10 in the present embodiment includes a plurality of stacked first car frames 11 and at least one second car frame 12 as a car frame.

Each of the first car frames 11 has a substantially rectangular first internal space 17 as in the case of a general car frame member, and further serves as a car material that defines the bottom surface of the first internal space 17. A substantially rectangular bottom net plate 13 described later, a pair of substantially rectangular side net plates 14 as a basket material defining the left and right side surfaces of the first internal space 17, and the first inner surface. It has a front and back surface of the space 17, that is, a pair of front and rear net plates 15 having a substantially rectangular shape as a cage material that defines the front and rear surfaces, which will be described later. In the example shown in the figure, the upper surface of the first internal space 17 is open, but may be defined by a net plate (not shown). Further, the left and right adjacent first car frames 11 share the side net plate 14, and the front and rear adjacent first car frames 11 share the front and rear net plates 15. Then, as shown in FIG. 3, the first internal space 17 is filled with a ground material such as crushed stone.

In addition, each of the second cage frames 12 has a substantially rectangular parallelepiped second internal space 18, and further, a substantially rectangular bottom net plate 13 that defines the bottom surface of the second internal space 18, which will be described later. A pair of side net plates 14 having a substantially rectangular shape defining the left and right side surfaces of the second internal space 18, and a substantially rectangular shape defining the front and back surfaces of the second internal space 18, that is, the front and rear surfaces. It has a pair of front and rear net plates 15 which will be described later. In the example shown in the figure, the upper surface of the second internal space 18 is open, but may be defined by a net plate (not shown). Further, the second car frame 12 shares the side net plate 14 with the first car frame 11 adjacent to the left and right, and the second car frames 12 adjacent to the front and rear share the front and rear net plates 15.

Then, as shown in FIG. 3, the second internal space 18 of the second car frame 12 as the pipe accommodating car frame is filled with a ground material such as crushed stone and serves as a pipe extending in the vertical direction. The retaining pipe 21 is housed. Further, the front and rear net plate 15 as the pipe passage panel is formed with a pipe passage hole 19 as a pipe passage hole through which the retention pipe 21 can pass. The hole-retaining pipe 21 is a pipe for securing a space through which the insertion member 40 can pass, and does not necessarily have to be densely arranged in the car frame structure 10, with a certain interval between them. It suffices if it is arranged. Therefore, as shown in FIG. 2, the second car frame 12 in which the hole-retaining tube 21 is housed may also be arranged at a certain interval in the car frame structure 10. That is, the second car frame 12 in which the hole-retaining tube 21 is housed can be arranged in any number of arbitrary places in the car frame structure 10 as needed.

The insertion member 40 passing through the hole-retaining pipe 21 is a reinforcing material 41 as shown in FIG. 4 or a drainage pipe 42 as shown in FIG. It is desirable that the reinforcing material 41 is inclined so that the deep underground end (right end in FIG. 4) is lowered in order to prevent mortar from spilling when filling the inside with the mortar. Further, the drainage pipe 42 is inclined so that the deep underground end (right end in FIG. 5) is raised for drainage. Therefore, it is desirable that the hole-retaining pipe 21 is also inclined according to whether the insertion member 40 is the reinforcing material 41 or the drainage pipe 42. Note that FIG. 2 shows an example in which the insertion member 40 is the reinforcing member 41.

Next, the configuration of the second car frame 12 will be described in detail. First, an example in which the retention tube 21 is not tilted will be described.

FIG. 6 is a perspective view showing the configuration of the car frame structure in the present embodiment, and FIG. 7 is a view showing another example of the front and rear net plates of the second car frame in the present embodiment. In FIG. 7, (a) is a diagram showing a lower portion, (b) is a diagram showing an upper portion, and (c) is a diagram showing a state in which a lower portion and an upper portion are combined.

In the present embodiment, the bottom net plate 13, the side net plate 14, and the front and rear net plates 15 as the basket material are members formed by forming a wire rod made of a metal such as carbon steel in a grid pattern or a mesh pattern. It may be a perforated plate such as punched metal formed by punching a large number of holes in a metal plate, or a plate-shaped member having a large number of openings, which may be made of any material and have any shape. It may be a thing. Further, the mesh is a substantially square having a side length of, for example, about 50 to 200 [mm], but may have any size and any shape. Further, the bottom net plate 13 is, for example, a rectangular member having a width direction dimension of about 500 to 2000 [mm] and a vertical dimension of about 1000 [mm], and the side net plate 14 is, for example, high. The front and rear net plate 15 is a rectangular member having a vertical dimension of about 500 [mm] and a vertical dimension of about 1000 [mm]. For example, the front and rear net plate 15 has a height dimension of about 500 [mm] and a width direction. Although it is a rectangular member having a size of about 500 to 2000 [mm], it may have any size and any shape.

As shown in FIG. 6, the front and rear net plate 15 of the second car frame 12 is formed by combining the lower portion 15A as the first portion and the upper portion 15B as the second portion. Then, a lower recess 16A is formed in the lower portion 15A as a first opening having a substantially U shape and the upper side is opened, and a lower side is opened in the upper portion 15B in a substantially U shape. An upper concave portion 16B is formed as a second opening, and when the lower lower portion 15A and the upper portion 15B are combined, the lower concave portion 16A and the upper concave portion 16B are combined so that the hole-retaining pipe 21 can pass through. A pipe passage hole 19 is formed as a substantially circular pipe passage hole.

Here, one type of lower side portion 15A in which a lower side recess 16A including a relatively large arc-shaped portion is formed is prepared, and an arc shape having a diameter equal to or less than the diameter of the arc-shaped portion of the lower recess 16A. An upper portion 15B in which the upper recess 16B including the portion is formed is prepared. It should be noted that a plurality of types of the upper portion 15B having different diameters of the arcuate portion can be prepared. Then, the diameter of the pipe passage hole 19 can be adjusted by selectively combining the upper portion 15B with the lower portion 15A. Specifically, by selecting the upper portion 15B in which the upper recess 16B including the arcuate portion having a diameter matching the outer diameter of the hole-retaining pipe 21 is formed, and combining the upper portion 15B with the lower portion 15A, The front and rear net plates 15 as a pipe passage panel having a pipe passage hole 19 having a size suitable for the outer diameter of the hole retention pipe 21 can be configured.

As a result, only one type of lower portion 15A is used, and only one of the plurality of types of upper portion 15B is selected, and the size is suitable for the plurality of types of outer diameter retaining pipes 21. The front and rear net plates 15 having the pipe passage holes 19 can be provided, and the number of parts can be reduced. It should be noted that the second portion having a different diameter of the arc-shaped portion does not necessarily have to be the upper portion 15B, and the second portion having a different diameter of the arc-shaped portion may be the lower portion 15A. For the sake of convenience, only an example in which the first portion is the lower portion 15A and the second portion is the upper portion 15B will be described. Further, there may be three or more types of the second portion, but here, for convenience of explanation, the upper portion 15B as the second portion is formed with a relatively small upper recess 16B as shown in FIG. Only the case where there are two types, the example of the upper portion 15B and the example of the upper portion 15B in which the relatively large upper recess 16B is formed as shown in FIG. 7, will be described.

In the example shown in FIG. 6, a relatively large lower recess 16A is formed in the lower portion 15A. Then, when the upper portion 15B is combined with the lower portion 15A, a front and rear net plate 15 having a small diameter pipe passage hole 19 having a size suitable for the outer diameter of the small diameter retaining pipe 21 can be obtained. The small-diameter hole-retaining pipe 21 is used, for example, for passing the drainage pipe 42.

On the other hand, in the example shown in FIG. 7B, a relatively large upper recess 16B is formed in the upper portion 15B. The lower portion 15A as shown in FIG. 7A is the same as the example shown in FIG. Then, as shown in FIG. 7C, when the upper portion 15B is combined with the lower portion 15A, it has a large-diameter pipe passage hole 19 having a size suitable for the outer diameter of the large-diameter retaining tube 21. The front and rear net plates 15 can be obtained. The large-diameter hole-retaining tube 21 is used, for example, for passing the reinforcing member 41.

As shown in FIG. 6, when assembling the car material to form the second car frame 12, first, the lower side portion 15A defining the front and rear of the second internal space 18 is attached. The lower side portion 15A is temporarily fixed to the front and rear net plates 15 or the side net plates 14 of the first car frame 11 adjacent to the left and right by a plurality of temporary fixing metal fittings 22. Then, after the hole-retaining tube 21 was placed in the second internal space 18 so as to pass through the lower recess 16A, an upper recess 16B having a size suitable for the outer diameter of the hole-retaining tube 21 was formed. The upper portion 15B is combined with the lower portion 15A. As a result, the front and rear net plates 15 as a pipe passage panel having a pipe passage hole 19 having a size suitable for the outer diameter of the hole retention pipe 21 are configured. The upper portion 15B and the lower portion 15A combined with each other are fixed to the front and rear net plates 15 of the first car frame 11 adjacent to the left and right by the connecting coil 23 as a connecting metal fitting. Specifically, as shown in FIG. 7C, the wire rods extending in the height direction at the left and right ends of the upper portion 15B and the lower portion 15A are the front and rear portions of the first car frame 11 adjacent to the left and right. It is fixed by a connecting coil 23 to a wire rod extending in the height direction at both left and right ends of the net plate 15. After that, the space around the hole-retaining pipe 21 in the second internal space 18 is filled with a ground material such as crushed stone.

The hole-retaining pipe 21 is a pipe for securing a space through which the insertion member 40 can pass in the second internal space 18 filled with a ground material such as crushed stone, and is made of, for example, vinyl chloride, carbon steel, or the like. Although it is a pipe, it may be a pipe made of any kind of material or a pipe of any size.

Next, an example in which the retention tube 21 is tilted will be described.

FIG. 8 is a diagram showing a first example of the front and rear net plate for tilting the hole-retaining pipe of the second car frame in the present embodiment, and FIG. 9 is a diagram showing front and rear of the hole-retaining pipe tilting of the second car frame in the present embodiment. It is a figure which shows the 2nd example of the part net plate. In FIGS. 8 and 9, (a) is a diagram showing a lower portion, (b) is a diagram showing an upper portion, and (c) is a diagram showing a state in which the lower portion and the upper portion are combined.

Here, a case where the front and rear net plates 15 are a combination of the large mesh 25 and the small mesh 27 will be described. The bottom net plate 13 and the side net plate 14 may be composed of only the large mesh 25 or the large mesh 25 and the small mesh 27, as in the example shown in FIG. It may be a combination. The large mesh 25 includes a large diameter wire rod 25a arranged in a square lattice pattern and a large mesh 26. The large-diameter wire rod 25a is a steel material having a diameter of, for example, about 6 [mm], and the large-diameter mesh 26 is a substantially square having a side length of, for example, about 50 to 200 [mm]. Further, the small mesh 27 includes a small diameter wire rod 27a arranged in a square lattice pattern and a small mesh 28. The small diameter wire 27a is a steel material having a diameter of, for example, about 1 [mm], and the small mesh 28 is a substantially square having a side length of, for example, about 10 to 40 [mm]. As described above, since the front and rear net plates 15 include the fine mesh 27, the ground material such as crushed stone filled in the first internal space 17 and the second internal space 18 is made of small particles. Even if it is a thing, it does not spill out from the front and rear net plate 15.

As shown in FIG. 8A, the lower portion 15A as the first portion of the front and rear net plates 15 of the second cage frame 12 is composed of only the large mesh 25, and is below the lower portion 15A. The side recess 16A is substantially U-shaped and has an open upper side, but does not include an arcuate portion and is a rectangular recess as a whole.

As shown in FIG. 8B, the upper portion 15B as the second portion of the front and rear portion net plate 15 of the second car frame 12 is a combination of the large mesh 25 and the small mesh 27. The large mesh 26 of the large mesh 25 has at least one maximum mesh 26a, which is a wire rod omitting portion that functions as a pipe passage hole forming portion. Further, in the example shown in the figure, the large mesh 26 in the portion other than the maximum mesh 26a in the large mesh 25 is further divided into a long mesh 26b, a short mesh 26c and a medium mesh 26d, and the maximum mesh 26a> the long mesh The size is set such that 26b> medium mesh 26d> short mesh 26c. The classification of the long mesh 26b, the short mesh 26c, and the medium mesh 26d is not necessarily limited to this, and can be changed as appropriate. If unnecessary, only the large mesh 26 having a uniform size can be used. You can also do it.

As shown in FIG. 8C, when the car frame structure 10 is constructed at the site where the embankment 31 is restored, the maximum mesh 26a is formed by cutting out a part of the small mesh 27 to form a pipe passage hole. It is a part forming 19. Since it is assumed that the reinforcing material 41, which is the insertion member 40, has a diameter of, for example, about 200 [mm] at the maximum, the diameter of the pipe passage hole 19 through which the hole-retaining pipe 21 through which the insertion member 40 passes passes. Is assumed to be required to be 200 [mm] or more. Therefore, it is desirable that the length of one side of the maximum mesh 26a is set to about 250 [mm] at the maximum. As a result, a pipe passage hole 19 having a diameter corresponding to the various hole-retaining pipes 21 corresponding to the insertion members 40 having various diameters can be formed in the maximum mesh 26a. Further, the front and rear net plate 15 is a portion that receives earth pressure, which is the pressure of the ground material such as crushed stone filled in the second internal space 18, and according to the rule of thumb, one side of the maximum mesh 26a. If the length is about 250 [mm] or less, the small mesh 27 corresponding to the maximum mesh 26a can withstand the earth pressure and break even without the large diameter wire 25a of the large mesh 25. There is nothing to do.

Further, it is desirable that the maximum mesh 26a is a central portion in the width direction of the upper portion 15B and is formed in contact with the upper end or the lower end. In the example shown in FIG. 8B, the maximum mesh 26a is located in contact with the upper end of the upper portion 15B in the upright posture. As a result, as shown in FIG. 8C, in a state where the upper portion 15B and the lower portion 15A are combined, the pipe passage hole 19 can be formed in the portion in contact with the upper end of the front and rear net plate 15. it can. Similar to the example shown in FIG. 7C, the large-diameter wire rods 25a extending in the height direction of the large mesh 25 at both left and right ends of the upper portion 15B and the lower portion 15A are adjacent to the left and right. 1 The connecting coil 23 is fixed to a large-diameter wire rod 25a extending in the height direction at both left and right ends of the front and rear net plates 15 of the car frame 11.

Then, when the upper portion 15B located in contact with the upper end of the upper portion 15B with the maximal mesh 26a as shown in FIG. 8B is turned upside down and inverted, the maximum is as shown in FIG. 9B. The mesh 26a is positioned in contact with the lower end of the upper portion 15B. Further, the lower recess 16A of the lower portion 15A is formed so as to reach the lower end of the lower portion 15A as shown in FIGS. 8A and 9A. As a result, as shown in FIG. 9 (c), in the state where the upper portion 15B and the lower portion 15A in the inverted posture shown in FIG. 9B are combined, the pipe passage hole 19 is formed in the front-rear net plate 15 It can be formed in the portion in contact with the lower end of the.

Therefore, for example, in the front-rear net plate 15 as shown in FIG. 8C, the front-rear net plate 15 formed in the portion where the pipe passage hole 19 is in contact with the upper end defines the front surface of the second internal space 18. Then, the front-rear net plate 15 formed in the portion of the front-rear net plate 15 as shown in FIG. 9 (c) in which the pipe passage hole 19 is in contact with the lower end defines the back surface of the second internal space 18. When the car frame structure 10 is constructed by using the second car frame 12, the ground is assumed so that the front side faces the slope 33 side and the back side faces the underground back side. The hole-retaining pipe 21 can be arranged in an inclined posture so that the inner and inner ends are lowered. Further, when the second car frame 12 is in a posture in which the front surface faces the underground depth side and the back surface faces the slope 33 side, the hole-retaining pipe 21 is tilted so that the underground depth side end is high. Can be arranged. As a result, the hole-retaining pipe 21 can be tilted according to whether the insertion member 40 is the reinforcing member 41 or the drainage pipe 42.

Next, the second car frame 12 in which the inclined hole-retaining tube 21 is housed in the second internal space 18 will be described.

FIG. 10 is a diagram showing an example of a second car frame in which the inclined hole-retaining tube according to the present embodiment is housed in the second internal space. In the figure, (a) is a schematic side view, (b) to (d) are schematic cross-sectional views, and are cross-sectional views taken along the line AA to CC in (a).

The front-rear net plate 15 formed in the portion of the front-rear net plate 15 as shown in FIG. 8 (c) in which the pipe passage hole 19 is in contact with the upper end defines the front surface of the second internal space 18, and FIG. A second front-rear net plate 15 as shown in (c), wherein the front-rear net plate 15 formed at a portion where the pipe passage hole 19 is in contact with the lower end defines the back surface of the second internal space 18. When the hole-retaining tube 21 is housed in the car frame 12, the hole-retaining tube 21 is tilted with respect to the substantially horizontal bottom net plate 13, that is, the second car, as shown in FIG. 10 (a). The front and back of the frame 12 are arranged in an inclined posture so that the positions in the vertical direction are different. Then, it is desirable to dispose at least one intermediate net plate 15C inside the second internal space 18 in order to stabilize the posture of the hole-retaining tube 21 and to reinforce the second car frame 12. Although FIG. 10 shows an example in which the three intermediate net plates 15C are arranged, the number of the intermediate net plates 15C can be arbitrarily set.

Further, the intermediate net plate 15C has substantially the same configuration as the lower portion 15A of the front and rear portion net plates 15 shown in FIGS. 8 and 9, and is composed of only the large mesh 25. Although it is substantially U-shaped and has an open upper side, it does not include an arcuate portion and has a rectangular recess 16C as a whole.

The hole-retaining tube 21 housed in the second internal space 18 of the second car frame 12 is located in the recess 16C of each intermediate net plate 15C, defines the left and right sides of the recess 16C, and extends in the height direction. The existing large-diameter wire rod 25a regulates the displacement in the left-right direction. Further, by filling the space between the lower surface of the hole-retaining tube 21 and the bottom net plate 13 with the filling material 35, the hole-retaining tube 21 is supported from below, and the hole-retaining tube 21 is supported in the vertical direction. Adjust the position of. As the filling material 35, the same material as the ground material such as crushed stone can be used.

Next, as shown in FIG. 10A, a desirable method for obtaining the second car frame 12 in which the inclined hole-retaining tube 21 is housed in the second internal space 18 will be described.

First, at least one intermediate net plate 15C is arranged inside the second internal space 18, and the upper portion 15B is removed from the front and rear net plates 15 that define the front and rear surfaces of the second internal space 18. In this state, the hole-retaining tube 21 is arranged in the second internal space 18, and the space between the lower surface of the hole-retaining tube 21 and the bottom net plate 13 is filled with the filling material 35 in the longitudinal direction (FIG. The vertical position of the hole-retaining tube 21 in each portion of 10 (a)) is adjusted, and the hole-retaining tube 21 is tilted at a predetermined angle. After the inclination of the hole-retaining tube 21 is set to a predetermined angle, a part of the small mesh 27 is placed at a position corresponding to the hole-retaining tube 21 in each of the maximum mesh 26a of the upper portion 15B attached to the front surface and the rear surface. By cutting, a pipe passage hole 19 is formed. Then, the upper portion 15B having the pipe passage hole 19 is attached to the lower portion 15A of the front surface and the rear surface to form the front and rear net plate 15, and then the second internal space 18 is filled with a ground material such as crushed stone. As a result, the second cage frame 12 in which the inclined hole-retaining pipe 21 is housed in the second internal space 18 and is filled with the ground material such as crushed stone can be obtained.

Next, a method of constructing the car frame structure 10 in the present embodiment will be described.

As shown in FIG. 2, the car frame structure 10 in the present embodiment is formed by assembling a car material and having a plurality of steps of a first car frame 11 and a second car frame 12 (in the example shown in FIG. 2). , 6 steps) It is composed by stacking. In this case, after assembling the basket material to form the first stage and filling the ground material such as crushed stone, the basket material is assembled on the ground material to form the second stage. When the first stage includes not only the first car frame 11 but also the second car frame 12, a hole-retaining tube 21 is arranged in the second internal space 18 of the second car frame 12 to crush the stone. After filling the ground material such as, etc., the basket material is assembled on it to form the second stage. By repeating such an operation, the first car frame 11 and the second car frame 12 are stacked in a plurality of steps in a staircase pattern.

FIG. 3 shows the car frame structure 10 under construction. The uppermost first car frame 11 and the second car frame 12 were configured, and the hole-retaining pipe 21 was arranged in the second internal space 18 of the second car frame 12, and was filled with a ground material such as crushed stone. The state is shown.

By constructing the basket frame structure 10 along the stepped portion of the stepped embankment 31 in this way, as shown in FIG. 1 (c-2), the main restoration of the collapsed embankment 31 Is completed. Further, if it is necessary to improve drainage and seismic resistance, after the restoration is completed, the insertion member 40 is passed through the car frame structure 10 and inside the embankment 31 as shown in FIG. 1 (c-3). Insert into. The method adopted for inserting the insertion member 40 into the embankment 31 is, for example, the RRR-C method (see, for example, Non-Patent Document 2), but any type of method may be used.
http://www.rrr-sys.gr.jp/rrr-c.html.

In FIG. 2, in order to improve seismic resistance, a reinforcing material 41 is selected as the insertion member 40, and the reinforcing material is passed through a hole-retaining pipe 21 arranged in the second internal space 18 of the second car frame 12. An example of inserting 41 into the embankment 31 is shown. As described above, the front-rear net plate 15 formed in the portion of the front-rear net plate 15 as shown in FIG. 8C, in which the pipe passage hole 19 is in contact with the upper end, forms the front surface of the second internal space 18. The front and rear net plates 15 defined and formed in the front and rear net plates 15 as shown in FIG. 9C and in contact with the lower end of the pipe passage hole 19 define the rear surface of the second internal space 18. Assuming that the second car frame 12 is in such a posture that the front surface faces the slope 33 side and the rear surface faces the underground side, as shown in FIG. 2, the second car frame 12 is in the ground. The hole-retaining pipe 21 can be arranged in an inclined posture so that the back end is lowered. Then, the reinforcing material 41 as shown in FIG. 4 passes through the hole-retaining pipe 21 and is inserted into the embankment 31. The reinforcing material 41 is inserted into the embankment 31 in an inclined posture so that the innermost end in the ground is lowered in order to prevent the mortar from spilling when the inside is filled with the mortar. Since the reinforcing material 41 is inserted into the embankment 31 in this way, it is possible to sufficiently exert the fixing force between the reinforcing material 41 and the embankment 31, and the embankment 31 which is the ground is effectively reinforced. Therefore, it is possible to prevent the slope 33 from collapsing during an earthquake, rainfall, or the like.

Further, instead of the reinforcing member 41, the drainage pipe 42 as shown in FIG. 5 can be selected as the insertion member 40. The drainage pipe 42 is a metal perforated pipe in which a large number of through holes are formed in at least the cylindrical wall surface of the portion to be inserted into the embankment 31, and is arranged in the second internal space 18 of the second car frame 12. It is inserted into the embankment 31 through the hole-retaining pipe 21. As described above, the front-rear net plate 15 formed in the portion of the front-rear net plate 15 as shown in FIG. 8C, in which the pipe passage hole 19 is in contact with the upper end, forms the front surface of the second internal space 18. The front and rear net plates 15 defined and formed in the front and rear net plates 15 as shown in FIG. 9C and in contact with the lower end of the pipe passage hole 19 define the rear surface of the second internal space 18. When the second car frame 12 is used in such a posture that the front surface faces the underground depth side and the rear surface faces the slope 33 side, the underground depth side end is raised. The hole-retaining tube 21 can be arranged in an inclined posture. Then, the drainage pipe 42 can be tilted so that the deep underground end is raised for drainage. Then, the water in the embankment 31 enters the drainage pipe 42 through the through hole and is discharged to the outside from the end of the drainage pipe 42 that opens to the front and rear net plates 15 in front of the second car frame 12. As a result, water can be discharged from the vicinity of the bottom surface of the embankment 31. In this way, it is possible to reduce the pore water pressure in the embankment 31, which is the ground, and prevent the slope 33 from collapsing during an earthquake, rainfall, or the like.

As described above, in the present embodiment, the car frame structure 10 includes a plurality of car frames including at least one second car frame 12 accommodating the hole-retaining tube 21. The second car frame 12 has front and rear net plates 15 on the front and back surfaces capable of forming a pipe passage hole 19 through which the hole-retaining pipe 21 can pass, and the front and rear net plates 15 have a lower recess 16A. The lower side portion 15A having the lower side portion 15A and the upper side portion 15B having the maximum mesh 26a capable of forming the pipe passage hole 19 are combined and formed, and the maximum mesh 26a is located in contact with the upper end of the upper portion 15B in the upright posture. The upper portion 15B is combined with the lower portion 15A of one of the front or the back surface of the second car frame 12 in an upright posture, and the upper portion 15B is combined with the other lower portion 15A in an inverted posture. The pipe passage hole 19 can be formed so that the positions in the vertical direction are different between the front surface and the back surface of the pipe. Therefore, at the site where the car frame structure 10 is constructed, the pipe passage hole 19 can be formed, and the pipe is placed at an arbitrary position so that the front and back positions of the second car frame 12 are different in the vertical direction. It is possible to form the passage hole 19 and accommodate the retention tube 21 in an inclined posture. If it is used for the restoration of the embankment 31, the main restoration can be performed without performing the temporary restoration, and the embankment 31 can be restored easily and surely in a short period of time.

Further, in the present embodiment, the restoration method of the embankment 31 is to construct the car frame structure 10 by stacking a plurality of car frames along the stepped portion of the stepped embankment 31. The plurality of car frames include at least one second car frame 12 accommodating the hole-retaining tube 21, and the second car frame 12 is before and after the tube passing hole 19 through which the hole-retaining tube 21 can pass can be formed. The front and rear net plates 15 have a portion net plate 15 on the front surface and the back surface, and the front and rear portion net plate 15 is a combination of a lower portion 15A having a lower recess 16A and an upper portion 15B having a maximum mesh 26a capable of forming a pipe passage hole 19. The maximum mesh 26a is located in contact with the upper end of the upper portion 15B in the upright posture, and the upper portion 15B is combined with the lower portion 15A on one of the front or back surfaces of the second car frame 12 in the upright posture. The upper portion 15B is combined with the other lower portion 15A in an inverted posture, and the pipe passage hole 19 can be formed so that the front and back surfaces of the second car frame 12 have different positions in the vertical direction. Therefore, in the restoration of the embankment 31, the main restoration can be performed without performing the temporary restoration, and the embankment 31 can be restored easily and surely in a short period of time.

It should be noted that the disclosure herein describes features relating to preferred and exemplary embodiments. Various other embodiments, modifications and modifications within the scope and purpose of the claims attached herein can be naturally conceived by those skilled in the art by reviewing the disclosure of the present specification. is there.

The present disclosure can be applied to a car frame structure and a method for restoring an embankment using the same.

10 Car frame structure 12 Second car frame 15 Front and rear net plate 15A Lower 15B Upper 16A Lower recess 19 Pipe passage hole 21 Retaining pipe 25 Large mesh 25a Large diameter wire 26a Maximum mesh 27 Small mesh 27a Small diameter wire 31 Filling 40 Inserting member 41 Reinforcing material 42 Drainage pipe

Claims (8)

A car frame structure including a plurality of car frames including at least one pipe accommodating car frame for accommodating pipes.
The pipe accommodating car frame has pipe passage panels on the front and back that can form pipe passage holes through which the pipe can pass.
The pipe passage panel is formed by combining a first portion having a first opening and a second portion having a pipe passage hole forming portion capable of forming the pipe passage hole.
The pipe passage hole forming portion is located in contact with the upper end of the second portion in the upright posture.
The second part is combined in an upright position with one first part of the front or back of the pipe housing car frame, and the second part is combined in an inverted position with the other first part, and the front of the pipe housing car frame. A car frame structure characterized in that the pipe passage hole can be formed so that the positions in the vertical direction are different between the rear surface and the rear surface. The second portion is formed by combining a large mesh having a large-diameter wire and a small mesh having a small-diameter wire, and the pipe passage hole forming portion is defined by the large-diameter wire and the periphery thereof is defined. The car frame structure according to claim 1, which is one of the large meshes closed by the mesh mesh. The car frame structure according to claim 2, wherein the pipe passage hole forming portion is the largest of the large meshes. The car frame structure according to claim 2 or 3, wherein the pipe passage hole is formed by cutting out a part of a mesh mesh of the pipe passage hole forming portion. The one according to any one of claims 1 to 4, wherein the pipe is housed in the pipe housing car frame in an inclined posture so that the front surface and the back surface of the pipe housing car frame are different in vertical positions. Basket frame structure. The car frame structure according to any one of claims 1 to 5, wherein the car frame can be filled with a ground material and can be stacked in a plurality of stages. The car frame structure according to claim 6, wherein the pipe prevents the inflow of the ground material and secures a space through which an insertion member inserted into the ground can pass. It is a restoration method of the embankment that builds a car frame structure by stacking multiple car frames along the stepped part of the embankment that has been cut into steps.
The plurality of car frames include at least one pipe housing car frame for accommodating pipes.
The pipe accommodating car frame has pipe passage panels on the front and back that can form pipe passage holes through which the pipe can pass.
The pipe passage panel is formed by combining a first portion having a first opening and a second portion having a pipe passage hole forming portion capable of forming the pipe passage hole.
The pipe passage hole forming portion is located in contact with the upper end of the second portion in the upright posture.
The second part is combined in an upright position with one first part of the front or back of the pipe housing car frame, and the second part is combined in an inverted position with the other first part, and the front of the pipe housing car frame. A method for restoring an embankment, characterized in that the pipe passage hole can be formed so that the positions in the vertical direction differ between the back surface and the back surface.