JPH07102567A - Reinforced soil retaining wall structure - Google Patents

Abstract

PURPOSE:To bury large-scale pipes, trees, etc., simply without damaging a reinforcing material or plant trees while preventing the exceeding of partial earth pressure working to a wall surface panel without damaging the force of reinforcement. CONSTITUTION:Constraining bodies 5 capable of constraining the deformation of soil particles are buried at positions entering into soil particles by size in a certain extent from the free surfaces of soil particles, and the end sections of partial reinforcing materials 4a, 4b buried are connected and fixed to the constraining bodies, thus improving the crumbling preventive effect of soil particles in a reinforced soil structure. One or a plurality of wall surface panels 2 for facing are combined and disposed onto the free surfaces of the soil particles in the reinforced soil structure. The partial reinforcing materials buried are coupled with the wall surface panels and fixed at the positions of disposal, thus constructing a facing wall surface 1 holding soil particles, which do not receive the frictional holding effect of the reinforcing materials so much in the vicinity of the surface of the reinforced soil structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, barriers, breakwaters,
It is a structure suitable for construction of embankment walls, road platforms, arch dams, tunnels, foundations, ground leveling, etc., and constructs a reinforced soil structure by embedding a reinforcing material in the soil grains, and at the same time, the reinforced soil structure. The present invention relates to the improvement of a reinforced soil wall structure in which a wall surface is provided on the free surface of the soil grain.

[0002]

2. Description of the Related Art The basic technique for constructing a reinforced soil structure by embedding a reinforcing material in a soil grain is disclosed in Japanese Examined Patent Publication No.
It was disclosed in Japanese Examined Patent Publication No. 48-11601 and the like, and then rapidly spread all over the world. The actual spread mode of the reinforced soil structure is implemented as a reinforced soil wall structure in which a wall panel for exterior is provided on the free surface of the soil particle so that the soil particle near the surface does not overflow. In many cases.

However, in the case of the conventional reinforced soil wall structure, it was reinforced by the material, friction coefficient, wear resistance, earth pressure coefficient, etc. of the embedding reinforcing material as described in JP-B-44-25174. Because the soil is calculated and constructed,
At the time of designing, the installation position, spacing, length, number of reinforcing materials, etc. are naturally limited to a certain allowable range from the viewpoint of overall stability. Moreover, as described in the above-mentioned patent publication, the end portions of the embedded reinforcing material were all connected to the wall panel. Therefore, in the case of the reinforced soil wall structure,
It is extremely difficult to bury or plant large-scale pipes, fences, pillars, trees, etc. without impairing the calculated and designed reinforcement capacity without disturbing the reinforcement material. there were. Conventionally, when there is a request for burying the above-mentioned necessary buried objects or planting trees, for example, as shown in FIG. 4, a U-shaped concrete groove B is buried in a reinforced soil wall structure. Alternatively, as shown in FIG. 5, a concrete connection box C is embedded in the reinforced soil wall structure A, and a reinforcing material D is connected to the groove B and the connection box C.
A structure in which the groove body B or the connection box body C and the wall surface panel E are also connected by the reinforcing material D has been adopted.

[0004]

However, in order to bury large-scale pipes, fences, pillars, trees, etc. without impairing the reinforcing force without hindering the reinforcing material or planting trees, U-shaped concrete groove body is embedded, concrete connection box body is embedded, and a reinforcing material is connected to these groove body and connection box body, and further, the groove body and connection box body. The structure in which the wall panel and the wall panel are also connected causes problems such as an increase in construction time and a corresponding increase in construction cost. Further, since all the reinforcing materials are connected to the wall surface panel, as shown in FIG. 6, according to the number of mounting the reinforcing material per one wall surface panel, the connecting metal fitting F
There is also the trouble of having to bury it. Especially when using a multi-wall panel to construct an exterior wall that has a zigzag-folded basic structure, connect the multi-wall panel that is going to be connected to the reinforcing material if the wall surface is inclined. It is difficult to embed metal fittings. In addition, if the mounting interval of the reinforcing material is increased in order to embed the reinforcing material without hindering the buried object, the local earth pressure acting on the wall surface panel will increase accordingly, and the durability of the wall material will be increased accordingly. It is necessary to take measures such as increasing

The present invention solves the above-mentioned conventional technical problems, does not impair the designed reinforcement force calculated as a reinforced soil structure, and prevents the local earth pressure acting on the wall panel from becoming excessive. However, we will provide a new reinforced soil wall structure that can easily bury large-scale pipes, fences, pillars, trees, etc. without disturbing the reinforcing material or plant trees. It is a thing.

[0006]

The first invention to obtain a patent is to embed a strip-shaped reinforcing material in the soil particles and to contact the soil particles with the direct frictional force between the reinforcing particles or the reinforcing material. In a reinforced soil structure that is held together by frictional forces with other elements, thus forming a structure having integrity and high resistance, the freedom of the soil particles of the reinforced soil structure. A restraint body that can restrain the deformation of the soil grain is embedded at a position that is within the soil grain to some extent from the surface, and the end portion of the embedded reinforcing material is connected and fixed to the restraint body. It is configured to enhance the collapse prevention effect of the soil particles of the reinforced soil structure in the direction of the free surface of the reinforced soil structure, and the free surface of the soil particles of the reinforced soil structure is combined with one or more wall panels for exterior. Part that is embedded in the installed wall panel Reinforcing material is connected and fixed at its installation position, thereby constructing an exterior wall surface that holds the soil particles that are near the surface of the reinforced soil structure and do not receive the friction holding effect of the reinforcing material so much. It is a reinforced soil wall structure characterized by.

The second invention to be granted a patent is to embed a strip-shaped reinforcing material in the soil particles, and to cause a direct frictional force between the soil particles and the reinforcing material or friction with other elements in contact with the reinforcing material. In a reinforced soil structure that is held together by force, thus forming an integral and highly resistant structure, only a certain size from the free surface of the soil particles of the reinforced soil structure. A restraint body capable of restraining the deformation of the soil grain is embedded at a position inside the soil grain, and the end portions of the part of the embedded reinforcing material are connected and fixed to the restraint body so that the reinforced soil structure is It is configured to enhance the collapse prevention effect in the direction of the free surface of the soil particles, and one or more wall panels for exterior are arranged on the free surface of the soil particles of the reinforced soil structure. A part of the embedded reinforcing material is connected to the installed wall panel. The exterior wall surface is constructed so that it is fixed to the location where it is placed, and thereby the soil wall that holds the soil particles that are near the surface of the reinforced soil structure and does not receive the friction holding effect of the reinforcement material is constructed. In the soil particles of the reinforced soil structure in the above, it is possible to bury the required burial material and to plant trees etc. without disturbing the reinforced buried material. Reinforced soil wall structure.

A third invention for which a patent is sought is a reinforced soil wall structure according to the second invention, wherein
Adopted a multi-walled panel, which is a plate-shaped basic panel with flexible joints formed at both left and right ends, and the wall panels can be connected in the left-right direction or stacked in the up-down direction for basic assembly. The construction constructs a zigzag exterior wall surface, but depending on how it is assembled, it is assembled so that the zigzag bending cycle matches in the vertical direction, and a zigzag vertical wall surface is constructed, or Is constructed in the height direction by shifting the zigzag bending cycle of the wall panels to form staircase steps to construct a staircase wall surface, or to construct a composite wall surface that combines vertical and staircase wall surfaces. When connecting the multi-walled panel, the multi-walled panel is connected and fixed to the reinforcing material embedded corresponding to the bent connection part, and the multi-walled panel is attached to the other end of the embedded reinforcing material. panel The restraint body embedded at a certain size inside the reinforced soil structure inside was connected and fixed, and it was buried at least near the inner side of the protruding part of the exterior wall that was bent in a zigzag or the stepped part. It is a reinforced soil wall structure characterized by forming a proper burying place where necessary burying materials can be buried and trees can be planted without disturbing the reinforcing material.

A fourth invention for which a patent is sought is the reinforced soil wall structure described in the first invention, the second invention or the third invention, wherein the reinforcing material has a belt-shaped thickness of 2.3 mm to 20 mm.
mm, width 35 mm to 150 mm steel plate is used, concrete block or steel plate is used for the restraint,
The pressure receiving area is 10 cm × 10 cm to 70 cm × 70 c
A reinforced soil wall structure characterized by having a structure in which at least one reinforcing material is connected to one wall panel within a range of m.

[0010]

EXAMPLES The present invention will be described in detail below based on examples. FIG. 1 is a perspective view showing the outline of the structure of the reinforced soil wall structure according to the present invention excluding the soil particle elements, and FIG. 2 is the outline of the structure of the reinforced soil wall structure excluding the soil particle elements. In the plan view shown, FIG. 3 is a longitudinal side view showing a state in which the reinforced soil wall structure according to the present invention has been applied.

The exterior wall surface 1 bent in a zigzag manner as shown in FIGS. 1 and 2 has a multi-wall surface panel 2 formed by forming bendable connecting portions 3 at both left and right ends of a plate-shaped basic panel. It is connected to and bent in a zigzag shape. The wall surface panel 2 is for covering the free surface of the soil particles of the reinforced soil structure, and some of the reinforcing materials 4a, 4a embedded in the wall surface panel 2 are connected and fixed at the installation position. To do.
As a result, the exterior wall surface 1 that holds the soil particles that are near the surface of the reinforced soil structure and that are less affected by the friction holding effect of the reinforcing materials 4a, 4a is constructed. Incidentally, the reinforcement member 4
a and 4b are strip-shaped thickness 2.3mm-20mm, width 35.
A steel plate having a size of mm to 150 mm is used, and its length is the length required for each case calculated based on the design conditions.

In the figure, reference numeral 5 is a constraining body in the shape of a concrete block, the pressure receiving area of which is 10 cm × 10 cm to 7 cm.
The range is 0 cm × 70 cm. The restraint body 5,
Although not shown, 5 and 5 may be steel plates having the pressure receiving area. The restraint body 5 is embedded at a position in the soil particle by a certain size from the wall panel 2 which is arranged and fixed, and the restraint body 5 of the illustrated embodiment is zigzag as shown in FIG. A part of the reinforcing members 4b, 4 embedded in the restraining body 5 are arranged linearly at a position apart from the bent exterior wall surface 1.
The end of b is connected and fixed. That is, the restraint body 5 capable of restraining the deformation of the soil grain is embedded at a position that is inside the soil grain by a certain size from the free surface of the soil grain of the reinforced soil structure A, and the embedded body is embedded in the restraint body 5. Partial reinforcement 4
The ends of b and 4b are connected and fixed to enhance the effect of preventing collapse of the soil particles of the reinforced soil structure toward the free surface.

As a result, between the wall surface panel 1 and the restraint body 5, a proper embedding portion 6 in which the reinforcing members 4a and 4b are not embedded is formed. That is, in the soil particles of the reinforced soil structure in the vicinity of the inside of the exterior wall surface 1, a suitable burying place where it is possible to bury a necessary burying matter or a tree without hindering the reinforced embedding material 4. 6 is formed.

As described above, a plurality of strip-shaped reinforcing materials are embedded in the soil particles based on the calculation, and the direct frictional force between the soil particles and the reinforcing material or the frictional force between other elements contacting the reinforcing material is used. In a reinforced soil structure A which is held together and thus forms a structure with high resistance, the wall panel 2 is connected to a part of the embedded reinforcement material 4a. Then, the exterior wall surface is constructed, and the other part of the buried reinforcing member 4b is connected to the restraint body 5 arranged at a position apart from the wall surface panel 2 to prevent the soil particles from collapsing toward the free surface direction. It is configured to increase the.

The present invention is an improvement of the treatment of the soil grain portion near the surface of the reinforced soil structure A, which is not so much affected by the friction holding effect of the reinforcing material. Reinforced soil wall structure configured to form a proper embedding portion 6 in which the required embedding material or a tree can be planted in the soil particles of the object A without hindering the embedding reinforcement material 4. It is a thing.

When the multi-wall surface panel 2 is assembled as in the illustrated embodiment, the zigzag-folded exterior wall surface 1 is basically constructed, but depending on the assembly method at that time,
Assemble so as to match the cycle bent in a zigzag in the vertical direction to build a zigzag vertical wall surface,
Or, the zigzag bending cycle of the wall panel to be assembled in the height direction is shifted to form a stepped stepped part to construct a stepped wall surface, or a composite wall surface in which a vertical wall surface and a stepped wall surface are combined. You can build it. Therefore, as the reinforced soil wall structure according to the present invention, it is necessary to bury the reinforcing materials 4a and 4b buried in the vicinity of the inner side of the projecting portion of the exterior wall surface bent in the zigzag shape as described above and the step portion without hindering. It is now possible to bury things and plant trees. Moreover, as the reinforced soil structure A, since the number of the reinforcing materials 4a and 4b to be buried is not reduced and the proper burying position is not displaced,
The designed reinforcing force is not impaired, and the restraint body 5 enhances the effect of preventing the soil particles of the reinforced soil structure A from collapsing toward the free surface, so that the local earth pressure acting on the wall surface panel becomes excessive. There is no such thing.

According to the experiments conducted by the inventor, the design reinforcement member 4
The required mounting interval is 1m in the vertical direction and 1 in the horizontal direction.
The restraint bodies 4 having a bearing area of 25 cm × 25 cm were attached to the end portions of the reinforcing member 4 at a rate of once every 2 m in the horizontal direction, while the interval was m. The change and appearance of the reinforced soil wall structure with a wall height of 6 m constructed in this way were observed, but there was no difference between the structure in which all the reinforcing materials 4 were attached to the wall surface,
It was stable.

[0018]

[Effects] As described above, according to the present invention, it is possible to form a concrete groove body or concrete in a conventional manner to form an appropriate place for embedding in a reinforced soil structure in which a reinforcing material is embedded. There is no need to bury the connection boxes made of steel, or to connect them to the wall panels, and there is no need to bury the connecting metal fittings according to the number of reinforcements installed per wall panel. Calculated as a reinforced soil structure, and without compromising the designed reinforcement force and preventing local earth pressure acting on the wall panel from becoming excessive, it is easy to use large-scale pipes, fences, pillars and trees. It is possible to provide a new reinforced soil wall structure that can be buried in a reinforcing material without hindering or a tree can be planted.

[0019]

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a configuration of a reinforced soil wall structure according to the present invention excluding a soil grain element.

FIG. 2 is a plan view showing the outline of the configuration of the reinforced soil wall structure excluding the soil grain element.

FIG. 3 is a vertical cross-sectional side view showing a state in which a reinforced soil wall structure according to the present invention has been applied.

[Fig. 4] In order to form a suitable place for embedding in the reinforced soil wall structure,
It is a longitudinal cross-sectional explanatory view showing a conventional example in which a U-shaped concrete groove is embedded.

[Fig. 5] In order to form a suitable place for embedding in the reinforced soil wall structure,
It is an explanatory plan view showing a conventional example in which a concrete connection box is embedded.

FIG. 6 is a perspective view showing a conventional wall panel in which connecting metal fittings are embedded and formed according to the number of reinforcing members to be mounted per one wall panel.

[Explanation of sign]

 DESCRIPTION OF SYMBOLS 1 ... Exterior wall surface 2 ... Wall surface panel 3 ... Connection part 4a, 4b ... Reinforcement material 5 ... Restraint body 6 ...

Claims (4)

[Claims] 1. A band-shaped reinforcing material is embedded in soil particles, which are held together by a direct frictional force between the soil particles and the reinforcing material or a frictional force between another element in contact with the reinforcing material. In a reinforced soil structure that is designed to form a structure having integrity and high resistance, the soil is placed at a position that is within the soil grain by a certain size from the free surface of the soil grain of the reinforced soil structure. A restraint body capable of restraining the deformation of grains is embedded, and the end portions of the part of the embedded reinforcements are connected and fixed to the restraint body to prevent the soil grains from collapsing in the free surface direction of the soil structure. In addition to being configured to enhance the effect, one or more wall panels for exterior are installed on the free surface of the soil particles of the reinforced soil structure, and the installed wall panels are buried. Connect a part of the embedded reinforcing material and fix it at the installation position. Reinforcing soil wall structure, characterized in that so as to build the exterior wall surface for holding the too received no soil particle frictional retaining effect of the reinforcing material was near the surface of the reinforcing soil structure Te. 2. A band-shaped reinforcing material is embedded in the soil particles, and they are held together by a direct frictional force between the soil particles and the reinforcing material or a frictional force between another element in contact with the reinforcing material. In a reinforced soil structure that is designed to form a structure having integrity and high resistance, the soil is placed at a position that is within the soil grain by a certain size from the free surface of the soil grain of the reinforced soil structure. A restraint body capable of restraining the deformation of grains is embedded, and the end portions of the part of the embedded reinforcements are connected and fixed to the restraint body to prevent the soil grains from collapsing in the free surface direction of the soil structure. In addition to being configured to enhance the effect, one or more wall panels for exterior are installed on the free surface of the soil particles of the reinforced soil structure, and the installed wall panels are buried. Connect a part of the embedded reinforcing material and fix it at the installation position. Reinforced soil structure is constructed so as to construct an exterior wall that holds the soil grains near the surface of the soil structure and does not receive the friction holding effect of the reinforcement material. In addition, a reinforced soil wall structure characterized by forming a proper burying place where necessary burying materials can be buried and trees can be planted without hindering the buried reinforcing material. 3. The reinforced soil wall structure according to claim 2, wherein the wall panel is a multi-wall surface panel in which foldable connecting portions are formed at both left and right ends of a plate-shaped basic panel, The exterior basic wall is constructed by connecting the wall panels in the left-right direction or stacking them in the up-down direction, and the basic construction is bent in a zigzag manner. Assemble in the vertical direction to construct a zigzag vertical wall surface as a whole, or stagger to form a stepped step by shifting the zigzag bending cycle of the wall panel to be assembled in the height direction. When constructing a wall surface or a composite wall surface that combines vertical wall surfaces and stepped wall surfaces, the multi-wall surface panel is connected to the reinforcing material embedded corresponding to the bent connection part. Solid Then, at the end of the buried reinforcement placed in the other part, connect and fix the embedded restraint at the position inside the multi-walled panel to some extent inside the reinforcement soil structure. , At least in the vicinity of the inner side of the protruding part of the exterior wall that is bent in a zigzag or in the small step part, it is possible to bury the necessary buried objects and plant trees etc. without disturbing the buried reinforcing material. A reinforced soil wall structure characterized by being formed. 4. The reinforcing soil wall structure according to claim 1, 2 or 3, wherein a strip-shaped steel plate having a thickness of 2.3 mm to 20 mm and a width of 35 mm to 150 mm is used as the reinforcing material. , Blocks made of concrete or steel plates are used for the restraint, and the pressure receiving area is 10 cm x 10 cm.
A reinforced soil wall structure having a structure in which at least one reinforcing material is connected to one wall panel in a range of ˜70 cm × 70 cm.