JPH0343410B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to reinforced soil structures used in road and railway construction, etc., and in particular, the use of corrugated sections as wall surfaces provides excellent workability and prevents deformation. It relates to a reinforced soil structure in which walls, embankment layers, and reinforcing materials are integrated.

Reinforced soil structure is a structure in which reinforcing materials are connected to the wall surface and earth is embanked on top of the reinforcing materials, thereby integrating the wall surface, the embankment layer, and the reinforcing materials. In addition to having advantages such as resource recovery, it is possible to construct upright walls,
It also has the advantage of requiring less land width, and is used in a wide range of fields, including road and railway widening work, retaining walls, bridge piers, and residential land development.

[Conventional technology]

As this type of reinforced soil structure, those shown in FIGS. 3 and 4 are known.

In the reinforced soil structure shown in Fig. 3, a plurality of steel strip wall members 1 having a U-shaped cross section are stacked horizontally and upright on the ground 2 to form a wall 3, and a reinforcing material is attached to the back of the wall 3. 4 are connected, and further, embankment is placed on the reinforcing material 4, and the embankment layer 5 is formed by rolling.

Furthermore, the reinforced soil structure shown in Fig. 4 has a plurality of supports 6, 6...6 established on the ground 2 at predetermined intervals.
Curved metal plates 1, 1...1 (wall surface members) are fitted between these adjacent pillars 2, 2 to form a wall surface 3, and a reinforcing material 4 is connected to the back surface of this wall surface 3 as in FIG. 3. The embankment is then filled with earth to form an embankment layer 5.

[Problem that the invention seeks to solve]

However, although the reinforced soil structure shown in Figure 3 is superior in that it can adapt to the compression of the embankment layer 5 by compressing it in the vertical direction, the wall surface 3 cannot stand on its own during construction. It has poor properties and is easily displaced when the embankment layer 5 is compacted, and as a result, it is unavoidable that the entire reinforced soil obtained is greatly deformed. moreover,
Since this wall member 1 is simply a flat steel plate processed into a U-shaped cross section, it has no flexibility in the horizontal direction. The connecting portion 7 of the member 1 is easily destroyed, and stress concentration is also likely to occur at the location where the reinforcing member 4 is attached.

Furthermore, in the reinforced soil structure shown in Fig. 4, metal plates 1, 1
...1 has no margin for displacement in the vertical direction, and as the embankment layer 5 is compressed, the connecting portion 7 of the metal plate 1 is likely to be destroyed as shown in FIG. moreover,
Since the wall surface 3 is constructed by combining the metal plate 1 and the struts 6, these metal plates 1 and the struts 6 exhibit different behaviors in response to loads, which tends to cause local stress concentration, which makes it difficult to integrate the wall surface 3. unable to maintain
Easily destroyed.

An object of the present invention is to provide a reinforced soil structure that is excellent in workability, is resistant to deformation, has a wall surface, an embankment layer, and a reinforcing material integrated, and improves the drawbacks of the above-mentioned known techniques.

[Means for solving problems]

In order to achieve the aforementioned object, according to the present invention:
A wall placed on the ground, an embankment layer placed on the back side of this wall, and a wall laid within this embankment layer.
In a reinforced soil structure composed of a reinforcing material whose one end is connected to a wall surface, the wall surface includes a plurality of corrugated sections formed by curving a corrugated metal sheet in a direction perpendicular to the corrugated grooves. As well as overlapping so that the corrugated grooves are perpendicular to the ground surface,
It is characterized in that vertically adjacent corrugated end faces are overlapped and joined, and the joint is placed on the ground so that it is parallel to the ground surface and buried in the embankment layer.

Hereinafter, the present invention will be explained in detail using the accompanying drawings. FIG. 1 is a perspective view of the reinforced soil structure of the present invention, particularly showing the wall surface, and numeral 10 indicates the wall surface. This wall surface 10 is constructed using corrugated sections 11. Here, the corrugated section 11 is a unit of a wall surface 10 formed by curving a corrugated metal sheet (indicated by number 12) in a direction perpendicular to the grooves 13 of the corrugation 12 as shown in the first diagram. A plurality of corrugated sections 11 configured in this way are arranged in the groove 1 of the corrugation 12.
3 are overlapped so that they are perpendicular to the surface of the ground 2, and the corrugated end surfaces 11a are vertically adjacent to each other,
The wall surface 10 is constructed by overlapping the parts 11a and connecting them with bolts 14, for example. This wall 1
0 is further placed on the ground 2 so that the joint portion 15 is parallel to the surface of the ground 2 and buried in the embankment layer 5.

Reinforcing materials 4, 4, . It is connected by folding back one end 4a and hanging it, and then pouring earth and sand onto the back side of the wall surface 10, that is, onto the reinforcing materials 4, 4...4, and rolling it to form an embankment.This process is repeated to add reinforcing material inside. 4, 4...4 laid embankment layers 5 are formed, and a reinforced soil structure according to the present invention as shown in FIG. 7 is constructed. In Figure 7, 16 is wall surface 1
It is the foundation of 0.

The reinforcing material 4 may be in any shape such as a bar, a belt, a sheet, or a net. In order to prevent the reinforcing material 4 from coming off from the embankment layer 5, a fixing plate 17 is provided at the tip of the reinforcing material to reinforce it. It is also possible to attach any fixing member to the reinforcing material 4, such as fixing it perpendicularly to the reinforcing material 4.

[Effect]

In the wall structure of the present invention described above, since the corrugated section 11 is used as a unit of the wall surface 10,
As shown in the second figure, even if a vertical load on the wall surface 10 in the direction of the arrow acts on the connecting portion 18 of one end 4a of the reinforcing member 4, stress concentration is unlikely to occur at the connecting portion because there is a margin for displacement due to the corrugation. No breakage of portion 18 occurs. Moreover, the earth and sand around the connecting part 18 is trapped in the groove 13 due to the corrugated structure 12 of the corrugated section 11, and the corrugated section 1
1, and does not cause relative displacement at the interface between the corrugated section 11 and the embankment layer 5,
Stress concentration is less likely to occur in the connecting portion 18, which would normally be the weakest point.

Furthermore, the wall surface 10 has a corrugated section 11
is corrugated and has an end face 11a located on the ground 2, and has a continuous arch-shaped cross section upward from this position, so it stands stably upright on the ground 2, and is therefore self-supporting on the wall surface 10 itself. It has excellent workability.

In addition, the end face 11a of the corrugated section 11
Since the joint part 15 of is buried in the embankment layer 5, this joint part 15 is integrated with the embankment layer 5,
Therefore, the entire wall surface 10 is integrated with the embankment layer 5, and stress concentration does not occur.

Furthermore, since the wall surface 10 is placed on the ground 2 so that the grooves 13 of the corrugations 12 are perpendicular to the surface of the ground 2, the cross section of the wall surface 10 in the direction perpendicular to the ground 2 faces upward, creating an arch-shaped It has a continuous shape, so it is only necessary to consider the tensile force on the wall surface 10 against the earth pressure from the back side, and the strong tensile force of the metal wall surface can be effectively utilized to create an extremely thin wall cross section. can withstand large earth pressures.

Furthermore, since the wall surface 10 has a corrugated structure, there is room for displacement in the vertical direction with respect to the back earth pressure.
Therefore, there is no fear of breakage as shown in FIG. 5 even at the joint between the upper and lower corrugated sections.

〔effect〕

As described above, the reinforced soil structure of the present invention has excellent workability, is resistant to deformation, and has the effect that the wall surface, the embankment layer, and the reinforcing material are integrated, making it resistant to stress concentration and resistant to destruction. be.

[Brief explanation of drawings]

FIG. 1 shows a perspective view of a reinforced soil structure centered on the wall surface area according to the present invention, FIG. 2 shows an explanatory diagram for explaining the function of the present invention, and FIGS. 5 shows an explanatory diagram of the reinforced soil structure of the prior art, FIG. 5 shows an explanatory diagram showing the drawbacks of the prior art, and FIG. 6 shows an explanatory diagram of a specific example of the reinforcing material connection method according to the present invention. FIG. 7 shows an explanatory diagram of the overall diagram of the reinforced soil structure according to the present invention. 2... Ground, 4... Reinforcement material, 5... Embankment layer, 10... Wall surface, 11... Corrugated section, 11a... End surface, 12... Corrugation, 13... Groove, 15... Joint portion.

Claims (1)

[Claims] 1. In a reinforced soil structure consisting of a wall placed on the ground, an embankment layer placed on the back side of this wall, and a reinforcing material laid within this embankment layer and connected at one end to the wall, The wall surface is formed by stacking a plurality of corrugated sections formed by curving corrugated metal sheets in a direction perpendicular to the corrugated grooves so that the corrugated grooves are perpendicular to the ground surface, and A reinforced soil structure in which vertically adjacent corrugated end faces are overlapped and joined together, and the joint is placed on the ground so that it is parallel to the ground surface and buried within the embankment layer.