JP2004143702A - Wall surface construction method using bagged soil, and wall surface structure using the bagged soil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To construct a more stable bagged soil wall surface. <P>SOLUTION: Bagged soil 4 with soil sealed at 30-80 vol.% in a bag body, and L-shaped wall surface members 3 or the like for covering the bagged soil, are used, and the L-shaped wall surface members 3 or the like are inserted between the optional stages while piling up the bagged soil 4 in a non-compacted state in a plurality of stages, whereas the installed bagged soil 4 is deformed following the surrounding ruggedness and solidified by rolling compaction every time the bagged soil is piled up in one stage or a plurality of stages. Further, the back face ground of the bagged soil is made into reinforced soil structure with reinforcing members embedded. The bagged soil wall surface can thereby be stabilized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an embankment construction method using bagging soil and an embankment constructed by the method.
[0002]
[Prior art]
In recent years, a construction method using a so-called sandbag in which a bag body is loosely packed with earth has attracted attention as a geotube or a solvak construction method. Whereas conventional sandbags are mainly used temporarily, such as for disaster countermeasure construction, new types of sandbags (hereinafter referred to as burial to distinguish them from conventional sandbags) are used as permanent civil engineering structures. It is intended to be used.
[0003]
This construction method utilizes the fact that the earth is restrained by the bag, the shear resistance of the earth in the bag and the tensile resistance of the bag material are combined, and a large resistance is exerted against the overload. (See Patent Document 1).
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2001-207422
[Problems to be solved by the invention]
However, since the above-mentioned prior art merely stacks bagging soil, there is room for improvement in the stability of the entire wall surface.
[0005]
Conventionally, when stacking the bagging soil or the functional material, leveling is performed by hitting concrete or the like, and the construction is accordingly complicated.
[0006]
Therefore, a main object of the present invention is to enable construction of a more stable wall surface.
[0007]
[Means for Solving the Problems]
The present invention that has solved the above problems is as described below.
<Invention according to claim 1>
In a method of constructing a wall surface by stacking a plurality of layers of bag-filled soil, which is filled with earth in a bag body, at a wall-forming position,
Using bag-filled soil in which 30 to 80% by volume of earth is enclosed in the bag body and a functional material that adds a function to the wall surface,
While stacking the bagging soil in a plurality of stages in a non-compacted state and sandwiching the functional material between arbitrary stages, each time one or more stages of the bagging soil are stacked, the installed bagging soil is rolled and the surrounding irregularities are pressed. To follow and deform,
A method for constructing a wall surface using bagging soil.
[0008]
(Effect)
As described above, (1) the amount of soil to be filled in the bag is set to 30% to 80% of the volume of the bag, and the bag is piled up in a non-compacted state in which the shape is freely deformable, and then (2) the bag is piled up. Rolling and compacting from above, the installed padding soil is deformed to follow the unevenness of the surroundings and densified, and even if a functional material such as an L-shaped wall material is sandwiched, the bag according to the unevenness generated The densification can be achieved while deforming the filling. Therefore, compared with the case of simply stacking, it is possible to more easily construct the wall surface made of the buried soil having extremely excellent stability.
[0009]
<Invention according to claim 2>
The functional material is a base material that is arranged so as to straddle a plurality of bagging soils in the plane direction.After the base material is arranged and leveling is performed, another functional material or bag is further placed thereon. The method for constructing a wall surface according to claim 1, wherein a filling soil is installed.
[0010]
(Effect)
In many cases, the wall formation position is not flat, and when the bags are piled up, irregularities gradually appear even if they are initially flatly stacked. Therefore, in the invention according to the second aspect, a base surface material is installed so as to straddle a plurality of bagging soils at an arbitrary stage, and after leveling, other functional materials such as an L-shaped wall material or a bag are provided. The filling is piled up. This eliminates the necessity of placing concrete, etc., which has been conventionally performed, makes it possible to perform leveling with simpler work, and can stack bagging soil and functional materials neatly. Can be accurately arranged.), And thereby the stability of the wall surface can be improved.
[0011]
<Invention of Claim 3>
3. The bag according to claim 1, wherein the functional material is a resistor arranged so as not to protrude from the step, and the rolling element causes the resistor to be reduced into each of the upper and lower filling materials. 4. Wall construction method using filling soil.
[0012]
(Effect)
As described above, the stacked bagging soil is very strong against the overload, but there is a problem that the sliding resistance between the bagging soils is low. According to the third aspect of the present invention, the resistor is reduced into each of the upper and lower bag filling materials. As a result, it is as if the resistor was fitted to each of the upper and lower bag fillings, and the durability against sliding breakage between the upper and lower stages is improved. Note that the conventional L-shaped wall material is also a functional material, but it protrudes from between steps, and is different from the resistor of the present invention.
[0013]
<Invention of Claim 4>
The functional material is cover means having a main body and a support movably connected to the back surface thereof.The support of the cover is fixed between the steps, and the main body is fixed to the support. The method for constructing a wall surface using the bagging material according to any one of claims 1 to 3, wherein the bagging material on the back surface is covered while maintaining a movable state with respect to the bagging material.
[0014]
(Effect)
2. Description of the Related Art Conventionally, a cover means such as an L-shaped wall material has been arranged to cover a surface made of bagging soil. However, in these devices, the support portion sandwiched between the bagging soil and the main body portion exposed on the wall surface are integrally formed, and the main body portion cannot move with respect to the support portion. In this case, when the main body portions of the cover means come into contact with each other due to land subsidence or the like, a large stress is applied thereto, so that a high-strength cover means is required.
[0015]
On the other hand, in the invention according to the fourth aspect, the support portion is fixed between the steps, and the main body portion covers the bag filling on the back surface while maintaining a movable state with respect to the support portion. Things. Thus, even when the lower ground or the back ground is subsided and deformed, and the main bodies of the cover means come into contact with each other, the main body can move with respect to the support portion accordingly. Therefore, a low-strength and inexpensive material can be used.
[0016]
In particular, when a plurality of movable cover means of the present invention are arranged side by side, the main body portions may be partially overlapped and arranged, and in this case, each main body portion is independently provided with respect to each support portion. Since it can move, it is possible to completely cover the wall surface made of the buried soil while maintaining the advantage that the cover means can be formed of a low-strength and inexpensive material.
[0017]
<Invention according to claim 5>
The wall construction method according to any one of claims 1 to 4, wherein a back ground of the bagging soil has a reinforcing soil structure in which a reinforcing material is embedded.
[0018]
(Effect)
If the wall is high, simply stacking the bagging soil will apply a very strong earth pressure to the piled-up portion of the bagging soil, which may impair the stability of the entire wall. In such a case, a more stable wall surface can be constructed by forming the back ground with a reinforced soil structure using a reinforcing material such as a geogrid.
[0019]
<Invention of claim 6>
6. The method according to claim 5, wherein the reinforcing material is connected to the functional material, and the piled bag filling is fixed to the back ground via the functional material and the reinforcing material. .
[0020]
(Effect)
By connecting the reinforcing material to the functional material in this manner, the construction wall surface can be fixed to the back ground, and a more stable wall surface can be constructed.
[0021]
<Invention of claim 7>
A wall structure using bagging soil, which is constructed by the method according to any one of claims 1 to 6.
[0022]
(Effect)
By constructing the wall surface by the method according to any one of claims 1 to 6, a stable bag-filled soil wall surface is obtained.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
In the method of the present invention, a bag, earth and a functional material are used. First, as the bag, a bag used in a known Solpac method or the like can be used. Specifically, a material made of a material such as polyethylene, polypropylene, or polyester and having a size of about 40 cm × 40 cm × 10 cm to 110 cm × 110 cm × 20 cm can be suitably used. As the soil to be filled in the bag, soil, sand, various types of soil generated in the field, and other materials used as a substitute for soil in the field of civil engineering, such as industrial by-products, can also be used.
[0024]
On the other hand, the functional material of the present invention is not limited to the L-shaped wall material used in the known Solpac method or the like, and any material can be used as long as it adds a function to the wall surface and is sandwiched between bagging soils. it can. Various forms of the functional material will be described in detail in the following construction method, including a newly proposed functional material.
[0025]
(First embodiment of the wall construction method)
FIG. 1 shows an example in which an L-shaped wall material 3 is used as a functional material, and a wall surface 2 mainly composed of bagging soil is formed on the side of the embankment 1. When constructing the wall surface 2, first, a required number of non-compacted bagging soils 4 are piled up at the wall formation position up to the installation height of the wall material 3. Here, preferably, rolling is performed once, and the installation surface of the subsequently installed wall material is flattened and leveling is performed.
[0026]
Next, on this step, a necessary number of functional materials, in this case, L-shaped wall materials 3, are arranged in a required number in a plane direction along the wall surface (a direction intersecting the plane shown in FIG. 1). The L-shaped wall material 3 is formed by integrally forming a main body portion 3a along the wall surface and a support portion 3b projecting from the back surface thereof, for example, with PC concrete, resin, or the like, and at least the support portion 3b is already installed. It is arranged so that it may be located on the upper surface of the bag 3.
[0027]
Next, the required number of the non-compacted bagging soils 4 are stacked on the support portions 3b of the wall material 3 up to the next wall material installation height. Thereafter, the upper surface of the piled bag filling 4 is rolled. At this time, the unfilled bag-filled soil 4 is free to deform because the internal soil is not restrained by the bag, and becomes dense while following and deforming according to the surrounding irregularities.
[0028]
Thus, there is almost no gap between the bag fillings 4 and 4 and between the bag filling 4 and the wall material 3, and the soil inside the bag is restrained by the bag, so that a large resistance to the overload can be obtained. Power will be demonstrated. Thereafter, by stacking the bagging soil 4 to the required level, installing the wall material 3 and performing compaction in the same manner as described above, the wall surface 2 made of the bagging soil 4 having extremely excellent stability can be constructed.
[0029]
In particular, when the L-shaped wall member 3 is used as in the present embodiment, it is preferable that the vertically adjacent wall members 3 are separated from each other so as not to contact each other. This makes it difficult for the upper and lower wall materials 3 and 3 to come into contact with each other even when the embankment is settled and deformed, thereby reducing the possibility of damage to the wall material. Therefore, there is an advantage that large strength is not required for the wall material 3.
[0030]
For this reason, in the embodiment shown in FIG. 1, the upper wall material 3 is slightly shifted backward with respect to the lower L-shaped wall material 3, and the upper and lower wall materials 3 and 3 are separated from each other while being wrapped in the vertical direction. . However, in this case, the surfaces of the wall members 3, 3,... Are not flush. Therefore, in order to make the surfaces of the wall members 3, 3... Flush with each other, the upper end of the main body portion 3a of the lower wall member 3, as shown in FIG. It is also proposed to provide a recess 3c for wrapping the parts apart. By providing such a recessed portion 3c, the lap portion of the lower wall material 3 can be arranged in the recessed portion 3c of the upper wall material 3 in a spaced state, so that the flush wall surface 2 can be constructed as shown in the figure.
[0031]
In the wall surface 2 constructed in this way, the piled bag fillings 4, 4,... Are covered by the L-shaped wall members 3, 3,..., And the stability of the wall surface 2, protection of the bag body from ultraviolet rays, and improvement of the scenery are achieved. In particular, when the wall materials 3 and 3 of each step are separated from each other, the separated portion 5 can be used as a planting space.
[0032]
In a more preferred form, as the functional material, base surfaces 6 and 6 having a size / shape straddling a plurality of bagging soils 4 and 4 in the plane direction (in the illustrated example, a bar shape, a plate shape, a grid shape, etc. (It may have an appropriate shape). More specifically, as shown in FIGS. 3 and 4, prior to the installation of the L-shaped wall member 3, the base members 6, 6 are laid over a plurality of bagging soils in a plane direction along the wall surface. After setting and leveling, the L-shaped wall material 3 is set thereon.
[0033]
Since the bagging soil 4 before rolling is easily deformed, it is difficult to align the installation positions when the wall materials 3 are juxtaposed in the plane direction. However, after the base materials 6 and 6 are set and the level is raised, the L-shaped wall material 3 is installed, the bagging soil 4 is stacked on top of the L-shaped wall material 3 and the compaction is carried out, so that the L-shaped wall material 3 is obtained. Can be arranged neatly. At this time, the base materials 6, 6 are reduced and fixed to the bagging soil 4 by the following deformation of the bagging soil 4. As can be seen from this, the base surfaces 6 and 6 also function as resistors described later.
[0034]
On the other hand, when constructing the high wall surface 2, simply stacking the buried soil 4 adds a very strong earth pressure from the back ground to the buried soil stacked portion, so that the stability of the entire embankment 1 may be impaired. is there. In such a case, in the present invention, as shown in FIGS. 5 and 6, the embankment 1G on the back surface is reinforced with a reinforcing earth structure, for example, a geogrid (a mesh material for civil engineering), a steel strip (tail armer method), a multi-anchor, or the like. A reinforced soil structure using the material 10 can be provided. The reinforcing member 10 shown in FIG. 5 is a geogrid, and the reinforcing member 10 shown in FIG. 6 is a multi-anchor. Thus, even when a high wall surface 2 is constructed by reinforcing the back ground, a more stable wall surface 2 can be constructed. However, it is of course possible to adopt the present reinforcing soil structure even when a low wall surface 2 is constructed.
[0035]
Further, as the functional material of the present invention, a part of the reinforcing material 10 can be sandwiched between the bagging soils 4 and 4. In a further preferred embodiment, the ends of these reinforcing members 4 and 4 can be connected to a functional material (L-shaped wall material in this embodiment) 3. .. Can be fixed to the back ground 1G via the functional material 3 and the reinforcing material 10. Such stabilization can be similarly applied to the embodiment described later.
[0036]
(Second form of wall construction method)
As described above, the wall surface 2 using the packing material 4 is extremely strong against the overload, but the sliding resistance between the upper and lower packing materials 4 and 4 is small. Therefore, in the second embodiment, as shown in FIGS. 7 to 9, the resistor 7 is sandwiched so as not to protrude from between the steps of the bag filling 4, and the upper and lower bags are pressed by the above-described compaction. Each of the fillings 4 and 4 is reduced. As a result, the resistor 7 is made to fit into each of the upper and lower fillings 4 and 4, and the resistance to sliding breakage between the upper and lower steps is improved. Although the conventional L-shaped wall member 3 is also a functional material, it protrudes from between steps, and unlike the resistor 7 of the present invention, has a low resistance increasing effect. In addition, it is preferable that the resistor 7 adopts a staggered arrangement in which the position in the depth direction is different between the upper and lower packing soil as shown in the figure.
[0037]
Although the L-shaped wall material 3 has few sites for planting to cover the wall surface 2, the resistor 7 is buried between the bag fillings 4 and 4 and does not cover the bag filling 4. Planting can be performed on the entire portion where the filling material 4 is piled up. Therefore, it is particularly suitable for constructing a natural landscape wall surface. In the illustrated embodiment, a planting net 20 such as a geogrid is laid on the surface of the piled bag filling 4, thereby holding the planting base material 21 on the wall surface 2.
[0038]
As the resistor 7, a rod or lattice made of PC concrete or steel is preferably used, but may have another shape. As described above, the function as the base material 6 may be provided. In particular, as shown in FIG. 9, in the case where the back embankment 1 </ b> G has a reinforced soil structure using the reinforced material 10, one end of the reinforced material 10 is connected to the connecting material 11 such as a wire or directly. It can be connected to the body 7. The reinforcing member 10 shown in FIG. 7 is a steel strip, and the reinforcing member 10 shown in FIG. 8 is an anchor.
[0039]
(Third embodiment of the wall construction method)
In the conventional L-shaped wall material 3, the support portion 3b sandwiched between the bag fillings 4 and 4 and the main body portion 3a exposed on the wall surface are integrally formed. 3a cannot move. Therefore, as described above, if the wall materials 3 and 3 are not spaced apart from each other, when the back embankment 1G sinks, the wall materials 3 and 3 come into contact with each other and a large stress is applied. Wall material is required.
[0040]
In the third embodiment, as shown in FIGS. 10 and 11, the problem is solved by using a cover unit 8 having a main body and a support movably connected to the back surface thereof. is there.
[0041]
As shown in FIGS. 12 and 13, the illustrated cover means 8 attaches a shaft member 81 to a rear surface of a main body portion 80 made of a flat panel material using a bracket 84 along a horizontal direction, and The body portion 80 is rotatably connected to the support portion 82 by freely rotatably passing through a cylindrical portion 82a provided at one end of a support portion 82 formed of a geogrid. Further, a cylindrical portion 82b is provided at the other end of the support portion, and the resistor 7 is disposed inside the cylindrical portion 82b.
[0042]
In this embodiment, the support portion 82 and the resistor 7 of the cover means 8 are fixed between the bag fillings 4 and 4 and the main body portion 81 is freely rotatable around the horizontal axis with respect to the support portion 82. It is arranged so as to cover the bag filling 4 on the back while maintaining the state.
[0043]
In the present embodiment, at least the cover means 8, 8 which are vertically adjacent to each other are not linked to each other. In a more preferred embodiment, the cover means 8, 8 which are adjacent in the plane direction are not interlocked with each other.
[0044]
Thus, even when the lower ground or the back ground 1G is settled and deformed, the main body 81 of the cover means 8 can rotate around the horizontal axis with respect to the support 82 following this. Therefore, even in such a case, since a large stress is hardly applied to the main body portion 81, the cover means 8 can be formed of a lower strength and less expensive material.
[0045]
In particular, when a plurality of movable cover means 8 of the present invention are arranged in parallel, the main body portions may be partially overlapped and arranged. Each cover means 8 in the illustrated form is arranged such that the lower part of the upper main body 81 overlaps the upper part of the lower main body 81. Also in such a case, since each of the main body portions 81, 81... Can independently move with respect to the respective support portions 82, 82,... The advantage that the cover means 8 can be formed of a low-strength and inexpensive material is maintained. Moreover, it is possible to completely cover the wall surface 2 made of the bag filling material 4.
[0046]
However, if the main body portion 81 moves too easily, there is a risk of pinching a hand, and there is a possibility of flapping and breaking in a strong wind, so that the movable range is limited so as to avoid this. It is desirable. For this reason, in the illustrated embodiment, as the restricting means for restricting the movable range of the main body 81, an inverted L-shaped engaging part 83 in which the upper part of the main body 81 of the lower cover means 8 is fitted with play to the lower rear part of the main body 81. Is provided. By installing the upper cover means 8 while inserting the upper part of the main body part 81 of the lower cover means 8 into the engaging portion 83, the upper and lower cover means 8 and 8 mutually regulate the movable range. Problems can be avoided.
[0047]
The cover means 8 can be arranged in a staggered manner as viewed from the front as shown in FIG. 14, or can be arranged in a matrix (not shown).
[0048]
Further, although the support portion 82 of the present embodiment is a net material having corrosion resistance, a steel material or the like subjected to a corrosion resistance treatment may be used. When a high-strength member such as a steel material is used, the same function as the resistor 7 can be provided. Further, the resistor 7 may be omitted in the illustrated embodiment. In the illustrated cover means 8, the main body 81 rotates around a horizontal axis along the wall surface direction. It may be configured to be mechanically connected and perform an appropriate operation.
[0049]
(Other)
(A) In the first embodiment, the base material 6 may be omitted.
(B) The base material 6 described in the first embodiment can be incorporated in the second and third embodiments.
(C) In the first to third embodiments, the reinforcing member 10 may be omitted.
(D) In the present invention, bag filling using bags of different sizes and shapes can be used.
(E) The present invention can be applied to a cut wall surface, a natural slope, and the like, in addition to the embankment wall surface (slope) as in the above embodiment.
[0050]
【The invention's effect】
As described above, according to the present invention, it becomes possible to construct a more stable wall mainly composed of bagging soil.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an embankment side showing a first embodiment.
FIG. 2 is a longitudinal sectional view of an embankment side portion showing the first embodiment.
FIG. 3 is an enlarged perspective view of a main part showing an arrangement form of a base material.
FIG. 4 is an enlarged perspective view of a main part showing an arrangement of base materials.
FIG. 5 is a longitudinal sectional view of an embankment side portion showing an example of adopting a reinforcing soil structure.
FIG. 6 is a longitudinal sectional view of an embankment side showing an example of adopting a reinforcing soil structure.
FIG. 7 is a longitudinal sectional view of an embankment side portion showing a second embodiment.
FIG. 8 is a longitudinal sectional view of an embankment side portion showing a second embodiment.
FIG. 9 is an enlarged sectional view of a main part.
FIG. 10 is a longitudinal sectional view of an embankment side portion showing a third embodiment.
FIG. 11 is a longitudinal sectional view of an embankment side showing a third embodiment.
FIG. 12 is an enlarged sectional view of a main part.
FIG. 13 is an enlarged perspective view of a main part.
FIG. 14 is a front view of a wall surface.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... embankment, 2 ... wall surface, 3 ... L type wall material, 4 ... bag filling material, 6 ... base material, 7 ... resistor, 8 ... cover means.

Claims (7)

In a method of constructing a wall surface by stacking a plurality of layers of bag-filled soil, which is filled with earth in a bag body, at a wall-forming position,
Using bag-filled soil in which 30 to 80% by volume of earth is enclosed in the bag body and a functional material that adds a function to the wall surface,
While stacking the bagging soil in a plurality of stages in a non-compacted state and sandwiching the functional material between arbitrary stages, each time one or more stages of the bagging soil are stacked, the installed bagging soil is rolled and the surrounding irregularities are pressed. To follow and deform,
A method for constructing a wall surface using bagging soil. The functional material is a base material that is arranged so as to straddle a plurality of bagging soils in the plane direction.After the base material is arranged and leveling is performed, another functional material or bag is further placed thereon. The method for constructing a wall surface according to claim 1, wherein the filling is installed. 3. The bag according to claim 1, wherein the functional material is a resistor arranged so as not to protrude from the step, and the rolling element causes the resistor to be reduced into each of the upper and lower filling soils. 4. Wall construction method using filling soil. The functional material is cover means having a main body and a support movably connected to the back surface thereof.The support of the cover is fixed between the steps, and the main body is fixed to the support. The method for constructing a wall surface using bagging soil according to any one of claims 1 to 3, wherein the bagging soil on the back surface is covered while maintaining a movable state with respect to the bagging soil. The method for constructing a wall surface using the buried soil according to any one of claims 1 to 4, wherein the back ground of the buried soil has a reinforced soil structure in which a reinforcing material is embedded. 6. The method according to claim 5, wherein the reinforcing material is connected to the functional material, and the piled bag filling is fixed to the back ground via the functional material and the reinforcing material. . A wall structure using bagging soil, which is constructed by the method according to any one of claims 1 to 6.

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