JP3751853B2 - Wall structure fixing structure for lightweight embankment method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wall surface material fixing structure in a lightweight embankment method.
[0002]
[Prior art]
A light-weight embankment method using a light-weight embankment material such as the EPS method is known as one of embankment methods on soft ground or landslide land. This construction method is widely used in various civil engineering works because it exhibits excellent effects in terms of cost reduction for ground improvement, shortening the construction period, and improving earthquake resistance. FIG. 8 is a cross-sectional view showing an example in which the lightweight embankment method is used for road widening work, and a polystyrene foam block (EPS block) is used as a lightweight embankment material.
[0003]
As shown in the figure, the H-section steel 2 is built on the slope of the existing ground where the existing road 1 is formed in the middle, and the EPS block 4 is stacked between the H-section 2 and the supporting ground 3. A bank with a predetermined height is formed. Thereafter, concrete is cast to a predetermined thickness over the entire surface of the stacked EPS block 4 to form a concrete floor slab 5. And the front-end | tip of the anchor 6 embed | buried and fixed to the support ground 3 is fixed to the anchor head 51 integrally formed in the concrete floor slab 5 so that the concrete floor slab 5 and the EPS block 4 may not raise | generate position shift of a horizontal direction. Thereby, the concrete floor slab 5 is integrally fixed to the existing ground side, and even when the support ground 3 moves due to an earthquake or the like, the concrete floor slab 5 and the EPS block 4 are separated from the support ground 3, that is, sliding. And avoid falling. Moreover, the wall surface protection material 7 provided with the weather resistance like a lightweight concrete board using the H-section steel 2 is attached. In addition, the ground cover concrete 10 is made on the valley side edge of the concrete floor slab 5, and the finishing work such as the roadbed 8 and the asphalt pavement 9 is performed as usual civil engineering work. finish.
[0004]
Incidentally, a resin foam block such as an EPS block is an elastic-plastic material. Therefore, when the roadbed 8 and the asphalt pavement 9 are stacked on the concrete floor slab 5 as finishing work, the EPS block 4 slightly sinks. Even after the completion of construction, temporary subsidence occurs when a large vehicle passes. For this purpose, as shown in FIG. 8, in the construction method in which the H-shaped steel 2 is vertically built and the light-weight embankment material 4 is stacked so that the valley side is almost a vertical wall, the H-shaped steel 2 and the H-shaped steel are used. Thus, the wall protector 7 and the resin foam block 4 that are attached to each other are in an unrestrained state, and the resin foam block 4 is allowed to sink downward.
[0005]
As another countermeasure against the sinking of the resin foam block described above, Japanese Patent Laid-Open No. 1-209999 discloses that a sandwiching member partially embedded in a concrete floor slab is slidably sandwiched between flanges of H-shaped steel. What is made is described. In the case of this structure, it is possible to prevent the pillars made of H-shaped steel from falling down due to the side pressure generated when the resin foam block is sunk, and a stable wall protection material can be constructed.
[0006]
On the other hand, since the construction of H-shaped steel as a structural support material requires a large machine for construction and is expensive in terms of cost, Japanese Patent Application Laid-Open No. 11-241343 discloses an inclined land instead of embedding H-shaped steel. A front panel such as a concrete board is fixed and self-supported on the concrete foundation formed at the bottom, and the concrete floor slab formed on the top surface of the stacked resin foam block is fixed to the top of the front panel using fasteners. A lightweight embankment method on slopes made to do is described.
[0007]
[Problems to be solved by the invention]
Since the construction method described in Japanese Patent Laid-Open No. 11-241343 does not perform the construction of H-shaped steel, a reduction in construction cost can be expected. However, the concrete floor slab is fixed to the front panel with a fastener, etc., and since the countermeasure against the sinking of the resin foam block is not sufficient, it concentrates on the fixing part between the front panel and the concrete floor slab. There is a risk of load generation and destruction.
[0008]
The present invention has been made in view of the above circumstances. In the lightweight embankment method, the construction cost of the resin foam block is ensured for ensuring weather resistance while significantly reducing the construction cost by omitting the erection of the H-shaped steel. An object of the present invention is to provide an improved wall surface material fixing structure in a lightweight embankment method that makes it possible to stably attach a wall surface protection material that must be attached to the side surface.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, the resin foam block is stacked in multiple stages so that at least one side surface is a substantially vertical surface as a lightweight embankment material, and a finishing structure material such as a roadbed is provided on the upper surface, In the structure for fixing the wall material in the lightweight embankment method in which the wall surface material is arranged in multiple stages on the side surface, the wall surface material has a vertical groove running in the vertical direction on the back surface, and the tip slides into the vertical groove. By inserting the fastening material anchored in a possible state between the stacked surfaces of the lightweight embankment materials to be stacked, so that the wall surface material is fixed to the almost vertical side surface of the light-weight embankment materials stacked in multiple stages. did.
[0010]
The fixing structure of the present invention is the knowledge obtained by the present inventors from many experiences, that is, the resin foam block such as an EPS block is basically stacked in multiple stages so that at least one side surface is a substantially vertical surface. However, it is based on the knowledge that it has sufficient independence and does not collapse. That is, in a lightweight embankment method in which resin foam blocks are stacked in multiple stages so that at least one side is a substantially vertical surface as a lightweight embankment material, and a finishing structure material such as a roadbed is disposed on the upper surface, It is based on the recognition that it was originally unnecessary to set up a column such as an H-shaped steel as a supporting structure material on the side surface.
[0011]
According to the present invention, the wall surface material arranged for the purpose of imparting weather resistance is the resin foam block side (lightweight embankment material) by the fastening material inserted between the laminated surfaces of the light weight embankment materials to be stacked. It is firmly attached to the side) and does not come off freely. Furthermore, the wall surface material has a vertical groove running in the vertical direction on the back surface, and the front end of the fastening material is slidably engaged in the vertical groove, so the vertical direction of the resin foam block The wall material arranged in multiple stages on the side surface is not affected by the sinking.
[0012]
It is conceivable that the resin foam block swells laterally due to the sinking of the stacked resin foam blocks and applies a lateral pressure to the wall surface material. However, the amount of movement is very small and can be sufficiently absorbed by the movement in the lateral direction between the wall materials. This also means that it is not necessary to give each wall surface material strength as a structural material, and the wall surface material itself can be made inexpensive.
[0013]
As described above, according to the present invention, both the stability of the lightweight embankment material stacked in multiple stages and the stability of the wall surface material arranged in multiple stages on the side surface are caused when the resin foam block sinks. Even if it exists, since it can secure without installing the support | pillar as a structural member like H-shaped steel, the total construction cost concerning a lightweight embankment construction method can be reduced significantly.
[0014]
In a preferred embodiment, a positioning member that can be inserted into both the longitudinal grooves and can be locked in that state is used for all or a part of the connecting portions in order to position the wall surface members that are vertically connected. By using such a positioning material, the work of stacking wall materials at the time of construction is greatly labor-saving.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an essential part of a banking construction part to which a wall material fixing structure in a light weight embankment method according to the present invention is applied. FIG. 2 shows a wall material used there and the wall material used as a light weight banking material. 1 is a perspective view showing an embodiment of a fastening device for fixing to a certain resin foam block. FIG.
[0016]
In this example, the supporting ground 3 is prepared in the same manner as in the conventional method at the time of construction, and the surface opposite to the inclined surface is a substantially vertical surface without erection of H-shaped steel as a supporting member. In this way, resin foam blocks (for example, EPS blocks) 4 as light weight embankment materials are stacked in multiple stages to form embankment portions having a predetermined height. At that time, as will be described later, the wall surface material 20 is fixed to the substantially vertical surface side of the resin foam block 4 using the fastening tool 30. Thereafter, a concrete floor slab 5 is formed, and the concrete floor slab 5 is fixed to an anchor 6 with one end buried in the ground. Further, a ground covering concrete 10 is formed on a shoulder of the concrete floor slab 5, and a roadbed 8 and asphalt pavement are formed. The finishing work such as 9 is performed in the same manner as in the case of the normal lightweight embankment method.
[0017]
A method for fixing the wall surface material 20 to the vertical surface side of the resin foam block 4 will be described. As shown in FIG. 2, the wall surface material 20 has a rectangular shape, and the width is arbitrary, but the height is preferably the same as the height of one resin foam block 4. The material of the wall surface material 20 is arbitrary on condition that it has weather resistance, and may be made of concrete, wood (thinned material), resin material, or the like. On the back surface of the wall surface material 20, for example, a metal or resin molded product, and guide rails 21 having openings 22 that run in the up-down direction on the back surface side are integrally embedded in a required number (two in the illustrated example). . The inner side of the opening 22 is a wider vertical groove 23.
[0018]
The fastening tool 30 is an integrally molded product of metal or resin, and includes a flat and long fastening piece 31 and a locking body 33 integrally formed at the tip of the fastening piece 31. The lateral width of the fastening piece 31 is narrower than the width of the opening 22 formed in the guide rail 21, and preferably, a non-slip ridge 32 is formed on the front and back of the fastening piece 31. The locking body 33 can enter the longitudinal groove 23 of the guide rail 21, but has a shape and size that does not escape from the opening 22. Therefore, the fastening tool 30 does not come out of the guide rail 21 in the lateral direction by making the locking body 33 part enter the longitudinal groove 23 of the guide rail 21. It is in a state where it can move (slide) freely in the vertical direction.
[0019]
The wall material 20 is fixed as follows. After the support ground 3 is prepared as described above, the concrete foundation 12 for both the resin foam block 4 and the wall surface material 20 is formed at a position that becomes a vertical surface of the resin foam block 4. At that time, preferably, as shown in FIG. 1, the level of the portion 13 serving as the basis of the wall surface material 20 is set higher than that of the portion 14 serving as the basis for the lowermost resin foam block 4a.
[0020]
The lowermost resin foam block 4a is placed on the formed foundation 12, and the wall material 20a shown in FIG. 2 is attached along the front surface of the resin foam block 4a. Since the foundation 12 has a step as described above, the upper end surface of the wall surface material 20a is positioned higher than the position of the upper surface of the resin foam block 4a. In this state, the fastening device 30 is attached to the guide rail 21 embedded in the back surface of the wall surface material 20a so that the engaging body 33 portion enters the vertical groove 23 of the guide rail 21. By pressing down the fastening tool 30 so that the fastening piece 31 is brought into contact with the upper surface of the resin foam block 4a, and the second-stage resin foam block 4b is stacked thereon, the wall material 20a Is firmly fixed to the vertical surface side of the resin foam block 4a. Hereinafter, by performing the same construction procedure for all the stages of the resin foam blocks 4 to be stacked, the fixing work of the wall surface material 20 to the vertical side surfaces of the resin foam blocks 4 stacked in multiple stages is completed. The fastening tool 30a (the fastening piece 31) at the uppermost stage is fixed between the resin foam block 4 and the concrete floor slab 5. Further, as shown in FIG. 1, the upper end surface of the wall surface material 20 located at the uppermost level is a higher position than the upper surface position of the uppermost resin foam block 4. Therefore, it is easy to perform finish construction such as the ground covering concrete 10, the roadbed 8, and the asphalt pavement 9 so as not to be placed on the wall surface material 20 located at the uppermost stage, and the wall surface material 20 is crushed. Such a situation does not occur.
[0021]
As described above, according to the fixing structure of the wall material in the lightweight embankment method according to the present invention, even when the resin foam block 4 sinks after finishing construction, the behavior is the vertical groove formed on the back surface of the wall material 20. 23 is absorbed by the sliding of the fastening tool 30 and does not affect the wall material 20. Therefore, it is possible to stably fix the wall material for weather resistance on the side surface of the lightweight embankment material without having to build up the pillar like H-shaped steel as before, and the construction cost is greatly reduced. To do.
[0022]
FIG. 3 shows another form of the fastener. The fastening tool 30a shown in FIG. 3a has two locking bodies 33 similar to those in the fastening tool 30 described above, and has the same spacing as the spacing between the plurality of guide rails 21 formed on the back surface of the wall surface material 20. Each locking body 33 is connected to a flat plate-like fastening plate 35 via an appropriate connector 34. The fastening device 30a of this aspect simplifies the attachment work to the wall surface material 20, and since the fastening plate 35 has a flat plate shape, the frictional force with the resin foam block 4 increases, Fixing is more stable. As shown in the figure, when the ridges 36 are formed on the front and back surfaces of the fastening plate 35, a more stable fixed state is secured. The fastening tool 30b shown in FIG. 3b is different in that a fastening hole 37 is provided at the tip of the fastening piece 31 in the fastening tool 30 described above. By using this fastening hole 37, an appropriate fixing tool 38 is driven into the resin foam block 4, so that the fixed state can be obtained more firmly. In addition, it is attachment using the fixing tool 38, The front and back of the fastening piece 31 may be flat.
[0023]
FIG. 4 shows a positioning member 40 which is preferably used for positioning the wall members 20 connected in the vertical direction, together with its usage mode. The positioning member 40 includes upper and lower insertion portions 41, 41 having a horizontal cross-sectional dimension substantially equal to the horizontal cross-sectional dimension of the vertical groove 23 of the guide rail 21, and a horizontal plate 42 positioned therebetween. The area is larger than the horizontal cross-sectional dimension of the vertical groove 23. By using such a positioning material 40 for the connecting portion between the wall surface materials 20 and 20, positioning in the longitudinal direction of the wall surface material 20 at the time of construction is facilitated, and the stacking work is greatly labor-saving. In particular, as shown in the drawing, it becomes easy to dispose the plurality of wall surfaces 20 by shifting the position in the longitudinal direction, and it becomes possible to impart high designability to the vertical side wall surface in the lightweight embankment method. Of course, when using the wall surface material 20 having two or more vertical grooves 23 running in the vertical direction on the back surface, a plurality of sheets are used while shifting the position in the vertical direction without using such a positioning material 40. It is also possible to arrange the wall material 20.
[0024]
5-7 is a figure equivalent to FIG. 1 which shows other embodiment. 5 to 7, the members having the same functions are denoted by the same reference numerals, and detailed description thereof is omitted. The form of FIG. 5 is different from the form shown in FIG. 1 in that the resin foam block 4 which is a lightweight embankment material is stacked in multiple stages so that both side surfaces are vertical surfaces instead of one side surface. Yes. This form is used when a road is formed on a flat ground surface by a lightweight embankment method, and the anchor 6 is not usually used.
[0025]
The form of FIG. 6 is that the resin foam blocks 4 that are lightweight embankment materials are stacked in a stepped manner as a substantially vertical surface, that is, a slightly inclined surface, instead of a vertical surface. It is different from the form shown in. In this embodiment, the wall material 20 is such that the upper edge 25 of the back surface protrudes inward by an amount corresponding to the inclination. The form of FIG. 7 is different from that of the form shown in FIG. 6 in that the surface side of the wall material 20 is stacked not to be stepped like in the case of FIG. 6 but to be a continuous inclined surface. is doing. In this embodiment, as the wall material 20, in addition to the rear surface upper edge 25 projecting inward, the surface side of the wall material 20 is a surface 26 inclined at an angle corresponding to the inclination.
[0026]
【The invention's effect】
According to the present invention, even when the resin foam block sinks after finishing construction, its behavior can be absorbed by sliding the fastening material in the longitudinal groove formed on the back surface of the wall surface material, The sinking of the resin foam block does not affect the wall material. For this reason, it is possible to directly and stably fix a wall material for imparting weather resistance to the side surface of a resin foam block, which is a lightweight embankment material, without having to build a support column like H-shaped steel as in the past. Thus, the construction cost of the lightweight embankment method is greatly reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a main part of a banking construction part to which a wall material fixing structure is applied in a lightweight banking method according to the present invention.
FIG. 2 is a perspective view showing an embodiment of a wall material and a fastening device for fixing the wall material to a resin foam block that is a lightweight embankment material.
FIG. 3 is a view showing another form of the fastening device.
FIG. 4 is a view showing a positioning member together with a usage mode thereof.
FIG. 5 is a cross-sectional view showing another embodiment of a banking construction portion to which a wall material fixing structure is applied in the lightweight banking method according to the present invention.
FIG. 6 is a cross-sectional view showing still another embodiment of a banking construction part to which a wall material fixing structure is applied in the lightweight banking method according to the present invention.
FIG. 7 is a cross-sectional view showing still another embodiment of a banking construction portion to which a wall material fixing structure is applied in the lightweight banking method according to the present invention.
FIG. 8 is a cross-sectional view showing an example when the lightweight embankment method is used for road widening work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Support ground, 4 ... Resin foam block as lightweight embankment material, 5 ... Concrete floor slab, 20 ... Wall surface material, 21 ... Guide rail, 22 ... Opening, 23 ... Vertical groove, 30 ... Fastening tool, 31 ... Fastening piece 33 ... Locking body 40 ... Positioning material

Claims (2)

Stack the resin foam blocks as lightweight embankment materials in multiple stages so that at least one side is almost vertical, and arrange the finished structure material such as roadbed on the upper surface, and arrange the rectangular wall material in multiple stages on the side The wall surface material fixing structure in the lightweight embankment method, wherein the rectangular wall surface material has a vertical groove running continuously in the vertical direction from the upper edge to the lower edge on the back surface, by inserting a longitudinal groove engaged wearing the fastening member in a slidable state between the laminated surface of the lightweight fill material to be staked, substantially lightweight fill material the rectangular wall material is stacked in multiple stages A fixing structure characterized by being fixed to a vertical side surface.   The positioning material that can be inserted into both vertical grooves and can be locked in that state is used for all or part of the connecting portions for positioning the wall materials connected vertically. The fixing structure according to 1.

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