JP5229815B2 - Reinforced earth wall structure and reinforced earth wall construction method using the same - Google Patents

Description

  The present invention relates to a reinforced earth wall structure for constructing an embankment layer and a reinforced earth wall construction method using the same. More specifically, the present invention relates to a reinforced earth wall structure for constructing a slope more stably by using a side wall member attached to a rising portion of a support frame, a connecting tool, and a connecting rod, and a reinforcing earth wall structure having the same. It is related with the reinforced earth wall method to be used.

  Conventionally, as a method of safely constructing a steep slope, a method of embedding using a formwork made of a net member or the like that is bent and formed in a slanted L shape according to the slope is proposed (for example, JP, 63-11488, JP-A-6-185059, etc.).

  Recently, it has become desirable to have a slope forming method that matches the surrounding environment and does not impair the natural landscape. In order to meet such a demand, for example, a plurality of vertical logs are arranged at predetermined intervals, and a slope forming member in which the vertical logs are fixed by a plurality of horizontal connecting logs and a base log are connected and fixed by a log. There has been proposed a method using a frame body in which a bottom surface forming member is connected and fixed (Japanese Patent Laid-Open No. 11-256585), but in such a structure, a uniform slope is ensured against earth pressure from the back surface. It was difficult.

  Therefore, by using a support frame, a wall surface member such as a plurality of natural thinnings attached to the rising portion of the support frame by fitting with a through hole provided at a predetermined position in the longitudinal direction. A slope structure of a reinforced earth structure that has been formed has been proposed (for example, Japanese Patent No. 349716, Japanese Patent Application Laid-Open No. 2001-59222, Japanese Patent Application Laid-Open No. 2003-20654, etc.). In these proposals, slant tie materials are used to prevent deformation of the rising part due to earth pressure from the inside of the wall member attached to the rising part, but there is still a problem that the slope structure is not stable. .

Japanese Patent Publication No. 63-11488 JP-A-6-185059 Japanese Patent Laid-Open No. 11-256585 Japanese Patent No. 349716 JP 2001-59222 A JP 2003-20654 A

An object of the present invention is to provide a sloped reinforced earth wall structure that can be constructed with a slope that conforms to the surrounding environment and does not impair the natural landscape and that can be constructed with a stable slope. .
Another object of the present invention is to provide a reinforced soil wall construction method for constructing a stable slope using the above reinforced soil wall structure.

In the present invention, a parallel rising portion of the front end portion so as to form an angle substantially equal to a predetermined slope gradient, a bottom portion extending rearward from the lower end of the rising portion, and a coupling portion connecting between the rear end portions of the bottom portion are integrated. And has a plurality of wall surface members fitted by through holes provided at predetermined positions in the longitudinal direction at the rising portion of the support frame. a structure connector extending rearward from the rising portion between the intermediate position and a by wall member is provided, is supported on the connecting member of the structure, consolidated bar Ru extending in a direction parallel to the wall member provided, a structure having a surface having a through hole in which the connector is to penetrate the connecting rod and perpendicular to the plane part and that has a through hole for passing said rising portion, connected to the rising portion rod It penetrates the respective through-hole, and a coupling portion connecting between the connecting rod and the bottom rear end to provide a reinforced soil wall structure of slope, characterized by being connected at an oblique tie material.

The sloped tie material has a structure having a through-hole through which the coupling portion and / or the connecting rod penetrates at an end thereof, and the reinforced earth wall structure of the slope is a preferred embodiment of the present invention.

  The above-mentioned sloped reinforced earth wall structure in which a screw thread is provided at the upper end portion of the rising portion of the support frame in the structure and the nut can be screwed together is a preferable aspect of the present invention. .

  The above-mentioned sloped reinforced earth wall structure in which the upper end of the rising portion of the support frame in the structure is below the upper edge of the uppermost member of the wall member and above the lower edge is This is a preferred embodiment of the invention.

  In the present invention, a plurality of the above-described structures are juxtaposed at the embankment slope forming portion, a connecting rod supported by the connector provided in the structure and extending in a direction parallel to the wall surface member is provided, and the connecting rod And a connecting portion connecting the rear end portion of the bottom portion is connected by a slant tie material, and a reinforced soil wall construction method for constructing embankment inside the wall surface member is provided.

  A plastic mesh is raised from the upper surface of the bottom of the support frame along the inside of the structure through the wall member and the connecting rod, and then filled and tightened in a space defined by the plastic mesh. The above-mentioned sloped reinforced earth wall construction method is a preferred embodiment of the present invention, in which the terminal portion that has been solidified and subsequently raised along the inside of the plastic mesh structure is folded back so as to wrap around the embankment surface.

According to the present invention, there is provided a sloped reinforced earth wall structure that can be constructed with a slope that matches the surrounding environment and does not impair the natural landscape, and that can construct a more stable slope than the conventional method. .
According to the present invention, there is provided a reinforced soil wall construction method for constructing a slope that is more stable than the prior art by using the above-mentioned sloped reinforced soil wall structure.

It is the schematic which shows the support frame of this invention. It is the schematic which shows the reinforced earth wall structure of the slope of this invention. It is a front view which shows the example of the coupling tool of this invention. It is the schematic which shows a mode that the connection rod is supported by the connection tool. It is the schematic which shows a mode that the reinforced earth wall structure of this invention is mounted in parallel. It is the schematic which shows an example of the diagonal tie material of this invention. It is the schematic which shows the aspect which increased the number of diagonal tie materials in the reinforced earth wall structure of FIG. It is the schematic which shows the condition which constructs embankment by the reinforced soil wall structure of the slope of this invention. It is a top view which shows an example of the plastic net-like material of this invention.

  The reinforced earth wall structure provided by the present invention includes a parallel rising portion at the front end portion so as to form an angle substantially equal to a predetermined slope, a bottom portion extending rearward from the lower end of the rising portion, and a rear end portion of the bottom portion. It has a metal support frame integrally formed with a connecting portion that connects them, and has a plurality of wall surface members that are fitted into the rising portion of the support frame by through holes provided at predetermined positions in the longitudinal direction. , A structure provided with a connecting tool that is intermediate between the upper and lower ends of the support frame and extends rearward from the rising portion between the wall members, and a direction that is supported by the connecting tool of the structure and is parallel to the wall members And a connecting rod that is supported by the connector, and a connecting portion that connects the connecting rod and the rear end of the bottom portion is connected by a slant tie material. It is a wall structure.

  As shown in FIG. 1, the metal support frame 1 of the present invention has a parallel rising portion 2 at the front end portion formed so as to form an angle substantially equal to a predetermined slope, and a rear side from the lower end of the rising portion. The extending bottom portion 3 and the connecting portion 4 connecting the rear end portions of the bottom portion are integrally formed. The bottom 3 extending backward from the lower end of the rising portion is preferably formed in parallel.

The wall member of the present invention may be a round member, a round member in which surfaces parallel to each other are formed on the top and bottom, or a square member. As the material of the wall member, natural thinning material is preferably used, but it may be made of synthetic resin made artificially. The wall surface member is provided with a through hole at a predetermined position in the longitudinal direction, and a plurality of wall surface members are fitted into the rising portion 2 of the support frame 1 through the through hole.
The length of the wall member is not particularly limited, but is preferably about 2 m.

  Since the wall surface member fitted in the rising portion 2 of the support frame 1 is fitted in a detachable state, it can be replaced and updated as necessary. The through hole of the uppermost wall member may be structured to prevent rainwater or the like from entering by closing the hole with an appropriate means or capping.

  In addition, since the degree of support by the support frame is low between the uppermost stage of the wall surface member and the lower stage thereof, the uppermost wall surface member is easily detached. When combined, it is effective for smoothly performing embankment construction work.

  FIG. 2 is a schematic diagram showing a sloped reinforced earth wall structure of the present invention. 2 has a plurality of wall surface members 5 fitted in the rising portion 2 of the support frame 1 by a through hole provided at a predetermined position in the longitudinal direction, and is an intermediate position between the upper end and the lower end of the support frame. A structure provided with a connecting tool 6 extending rearward from the rising portion between the wall surface members, and a connecting rod 7 supported by the connecting tool 6 of the structure and extending in a direction parallel to the wall surface member are provided. The situation is shown.

  The connecting tool 6 plays a role of supporting the connecting rod by extending backward from the rising portion between the wall surface members, and has a through-hole through which the rising portion 2 of the support frame penetrates at the end. It has a structure having a through hole through which the connecting rod 7 penetrates at the end. Although there is no restriction | limiting in particular in the shape of the through-hole provided in the connection tool 6, Usually, it forms in squares, such as circular or square or a rectangle. When the through hole penetrating the rising portion 2 of the support frame has a rectangular shape that is long in the longitudinal direction of the connector 6, it is a preferable shape because the connector 6 has a degree of freedom to move in the longitudinal direction. FIG. 3 shows an example of the connector of the present invention. FIG. 3A shows a connecting member having a flat plate having a through hole 6a in which the end 6-1 has a long rectangular shape in the longitudinal direction and a multi-end 6-2 having a through hole 6b. (B) shows the connector which is a flat plate in which both ends 6-1 and 6-2 have circular through-holes 6b as another example. Both ends 6-1 and 6-2 of the connector are formed in directions orthogonal to each other. FIG. 4 is a schematic view showing a state in which the connecting rod 7 is supported by the connecting portion 6.

  The connection tool 6 is an intermediate position between the upper end and the lower end of the support frame and is fixed between the two wall surface members, and extends backward from the rising portion to support the connection rod 7. The material of the connector is not particularly limited as long as it can withstand the pressure of the embankment and can support the support frame and the connecting rod, but is preferably made of metal.

  The connecting rod 7 of the present invention is supported by the connecting tool 6 and attached in a direction parallel to the wall surface member. Although there is no restriction | limiting in particular in the shape and material of a connecting rod, It is preferable that it is a round steel. The connecting rod 7 has a length that can be supported by the connecting tool. The connecting rod 7 preferably has a length substantially equal to that of the wall surface member, but may be a long body that can be supported by a connecting member of a plurality of structures. When the connecting rod is such a long body, the length is preferably substantially equal to the total length of the plurality of wall surface members.

  In the embankment formation, a plurality of sloped reinforced soil wall structures are placed in parallel to form a slope. When the connecting rod is a long body that can be supported by a connector of a plurality of structures, the reinforcing soil wall structure of a plurality of slopes placed in parallel is supported by the connector and joined together. Attached to. FIG. 5 is a schematic view showing a state in which a connecting rod is attached so as to be connected to a plurality of reinforcing earth wall structures mounted in parallel and to connect the reinforcing earth wall structures. Yes.

  In the sloped reinforced earth wall structure of the present invention, a slant tie material 8 is provided between the connecting portion 4 and the connecting rod 7 that connect the rear end portions of the bottom portion. There is no restriction | limiting in particular in the shape of the slant tie material 8, What is necessary is just the shape which can connect the coupling | bond part 4 and the connecting rod 7. FIG. For example, it may have a shape that engages with the coupling portion 4 and the connecting rod 7, but preferably has a structure having a through-hole through which the coupling portion 4 and / or the coupling rod 7 penetrates. By adopting such a shape, it is easy to exert the effect as a diagonal tie material having a feature that a conventionally known end portion is less likely to come off than a diagonal tie material having a hook shape. FIG. 6 shows, as a more preferable example, a diagonal tie material 8 having a structure in which both ends have through holes through which the coupling portion 4 and the connecting rod 7 pass.

  In the reinforced earth wall structure of the present invention, since the slant tie material 8 can be attached between the connecting portion 4 and the connecting rod 7, any number of slant tie materials can be attached at any position. Filling stable against earth pressure can be formed, and deformation due to earth pressure can be prevented. FIG. 2 shows an aspect in which two diagonal tie members are attached to one support frame, while FIG. 7 shows an aspect in which three oblique tie members are attached to one support frame. . In the present invention, any number of diagonal tie materials can be attached as required.

  In the reinforced earth wall structure of the slope according to the present invention, it is preferable that a screw thread is provided at the upper end of the rising portion 2 of the support frame 1 so as to be screwed with the nut. By adopting such a structure, it is possible to fix the connecting tool 6 and prevent it from coming off the support frame, and to easily remove the connecting tool 6 when replacing the wall surface member.

  In the sloped reinforced earth wall structure of the present invention, the upper end of the rising portion 2 of the support frame 1 is preferably located between the upper edge and the lower edge of the uppermost wall member. More preferably, it is desirable to be positioned below the middle of the upper edge and the lower edge of the uppermost wall member. This is because the wall member replacement operation can be facilitated.

  An example of a sloped reinforced soil wall construction method using the sloped reinforced soil wall structure of the present invention will be described below. FIG. 8 is a schematic view for explaining a situation where a plurality of levels of banking have been constructed. The reinforced earth wall structure 10 of the present invention is placed on the ground, and a plastic mesh 20 is laid horizontally on the ground (20-1). The plastic mesh 20 is raised along the rear side surface between the rear side surface of the wall member and the connecting rod 7 (20-2). At this time, if necessary, a sandbag may be installed at the rising corner of the plastic net 20 to fix the plastic net 20. The construction sites prepared in this way are sequentially filled and compacted by an earthworking machine using ordinary means such as rolling. At this time, earth pressure due to rolling or the like is suppressed by the formwork, and the slope of the designed gradient is continuously formed.

  The tip of the plastic mesh 20 raised along the rear surface of the wall member is bent along the embankment surface, and the plastic mesh 20 is horizontally extended (20-3) on the embankment surface, and the required length It is preferable to coat only. The horizontally extended plastic mesh may be fixed using the anchor pin 11 or the like. In the preferred embankment aspect, it is encased in three aspects: a plastic net that is horizontally embedded below, a plastic net that is provided on the slope forming part, and a plastic net that is horizontally disposed on the upper surface. , They are integrated to form a stable embankment.

  The plastic mesh 20 that can be used may be any type of mesh as long as it satisfies the strength, durability, weather resistance, and workability sufficient for stable formation of the embankment, and is accurately placed on the rear side of the wall member. It is desirable to have flexibility and rigidity to adapt to. The mesh shape and size need only be such that the sloped earth and sand can be integrated and held. Examples of the mesh include a square, a rectangle, and a parallelogram with a side length of 3 to 7 cm. The plastic mesh may be used by superimposing a plurality of types having different mesh sizes and different mechanical strengths.

  FIG. 9 is a plan view showing an example of the plastic mesh 20 used in the present invention, in which thick shaft members extend in the vertical direction and the horizontal direction and are connected to each other, and a rectangular mesh is provided therebetween. It is a long object. The plastic mesh as shown in this example retains moderate rigidity and flexibility by itself, and the strength that does not break the mesh shaft due to the pressure of the embankment, and that it can be rolled back. It has as much flexibility as possible.

  In particular, the plastic mesh shown in FIG. 9 is made of a material such as polyethylene and polypropylene, and has high rigidity because it is oriented in the vertical and horizontal directions, and has a vertical and It can be bent along the horizontal shaft and maintained at that angle. Therefore, even when the plastic mesh 20 is raised along the rear side surface of the wall member 4, the plastic mesh 20 can easily maintain the angle, so that the work can be performed with good workability. The connecting rod 7 of the present invention is useful for stably holding the plastic mesh. As an example of such a plastic network, Mitsui Chemicals, Inc. Product Tensor can be cited.

  In the sloped reinforced soil wall construction method using the sloped reinforced soil wall structure of the present invention, a plastic mesh 30 may be further laid on the ground behind. By laying such a plastic net, the embankment becomes more stable. When the plastic mesh 30 is laid on the ground behind, a higher embankment stabilizing effect can be obtained by combining the plastic mesh 20 on the ground 20-1 and the plastic mesh 30 with an appropriate joiner 31. Is obtained.

  In the sloped reinforced earth wall construction method using the sloped reinforced earth wall structure of the present invention, a porous sheet such as a nonwoven fabric may be laid along the plastic mesh 20, in FIG. An example in which a porous sheet 40 is used behind the net 20 is shown. When such a porous sheet 40 is used, it is possible to prevent the earth and sand from spilling out together with the water when the embankment contains water such as rainwater, which is a preferable mode. As a suitable example of a porous sheet, Mitsui Chemicals, Inc. product Tafnel EX40 etc. can be mentioned.

The slope provided by the present invention provides a slope that matches the surrounding environment and does not impair the natural scenery, and can be constructed more stably than the conventional method. Reinforced earth wall structure is possible.
In the sloped reinforced earth wall structure provided by the present invention, the slope tie material can be installed freely by using a connecting tool and a connecting rod, so that a more stable slope than the conventional method can be constructed.
According to the present invention, since the wall member can be easily replaced, a reinforced soil wall structure and a reinforced soil wall construction method having a slope that is optimal for slope construction are provided.

1. Support frame 2. 2. Rising part Bottom 4. 4. Coupling unit 5. Wall member Connector 6a. Square through hole 6b. 6. Circular through hole Connecting rod8. Oblique tie material10. Reinforced earth wall structure11. Anchor pin 20. Plastic mesh 30. Plastic mesh 31. Joiner 40. Porous sheet

Claims (8)

A parallel rising portion at the front end portion, a bottom portion extending rearward from the lower end of the rising portion, and a connecting portion connecting between the rear end portions of the bottom portion are integrally formed so as to form an angle substantially equal to a predetermined slope. It has a metal support frame, and has a plurality of wall members fitted by through holes provided at predetermined positions in the longitudinal direction at the rising portion of the support frame, and is located at an intermediate position between the upper end and the lower end of the support frame. a structure connector extending rearward is provided from the rising portion between the wall member Te, it is supported on the connecting member of the structure, and consolidated rod is provided Ru extending in a direction parallel to the wall member , a structure having a surface having a through hole in which the connector is to penetrate the connecting rod and perpendicular to the plane part and that has a through hole for passing said rising portion, each connecting rod and the rising portion Extends through a through-hole, the connecting rod and the bottom reinforced soil wall structure of slope in which the coupling portion connecting the rear portion characterized in that it is connected by diagonal tie material.   2. The sloped earth wall structure according to claim 1, wherein the diagonal tie material has a structure having a through-hole through which the coupling portion and / or the connecting rod penetrates at an end thereof. Is provided with a threaded upper end portion of the rising portion of the support frame in front Ki構 Zotai, reinforcing the slope according to claim 1 or 2 characterized in that it is a structure capable screwed nut Earthen wall structure.   The slope wall reinforcing earth wall structure according to any one of claims 1 to 3, wherein the connecting rod has a length substantially equal to a wall surface member.   The sloped reinforcing earth wall structure according to any one of claims 1 to 3, wherein the connecting rod is a long body that can be supported by a connector of a plurality of structures. The upper end of the rising portion of the support frame in front Ki構 Zotai is below the upper edge of the uppermost member of the wall member, according to claim 1, characterized in that in a position above the lower edge thereof A sloped reinforced earth wall structure according to any one of the above.   A plurality of structures according to any one of claims 1 to 6 are juxtaposed at the embankment slope forming portion, and a connecting rod supported in the connector provided in the structure and extending in a direction parallel to the wall surface member is provided. A sloped reinforced earth wall construction method in which the connecting portion connecting the connecting rod and the bottom rear end portion is connected by a slant tie material, and embankment is constructed inside the wall surface member.   A plastic mesh is raised from the upper surface of the bottom of the support frame along the inside of the structure through the wall member and the connecting rod, and then filled and tightened in a space defined by the plastic mesh. The sloped reinforced earth wall construction method according to claim 7, characterized in that the end portion raised along the inside of the plastic mesh structure is folded and folded back so as to wrap around the embankment surface.

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