JPH0686730B2 - Method of constructing steep slope embankment slope and wall structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a steep slope embankment slope and its constituent members.

[0002]

2. Description of the Related Art In embankment work involving the formation of steep slopes, the slopes are generally retained by building concrete retaining walls.

Further, in embankment work on soft ground where it is difficult to construct a concrete retaining wall, a reinforced earth method is used to reinforce the slope with a special material.

As an example, iron plates are locked horizontally and vertically at a predetermined interval on the back surface of a concrete wall panel, and earth is buried in the embankment by embanking behind the wall panel. A tail Arme method is known in which a wall panel is integrated with the embankment by frictional resistance between an iron plate and the embankment material to retain the slope.

Alternatively, the earth retaining material such as sandbags or crushed stone is wound with a sheet or net-like reinforcing material and the earth is embeded behind, so that the reinforcement material buried in layers inside the embankment supports the earth retaining material. The reinforced soil construction method is also implemented.

[0006]

However, in the case of the Tail Arme method, since the wall surface panel made of concrete cannot be used, vegetation cannot be applied to the slope, which may be aesthetically unfavorable depending on the construction site.

On the other hand, in the construction method using sandbags for the soil retaining material, the vegetation on the slope is possible by using the net as the reinforcing material and the vegetation sandbags as the sandbags.
In this case, the slope has a flexible structure, and the exposed portion of the reinforcing material is easily deteriorated by ultraviolet rays, so that the slope is inevitably deformed and there is a problem in durability.

[0008] The present invention has been made to solve the above problems in the reinforced earth construction method, and an object thereof is to prevent the deformation of the slope and maintain the aesthetic appearance of the vegetation.

[0009]

According to the present invention, an end portion of a sheet-like or net-like reinforcing material in which an earth retaining material such as a sandbag or crushed stone is wound is laid in a layer in the embankment, and the soil and the solidifying agent are solidified. A wall structure composed of a mixture of the and short fibers is constructed in contact with the earth retaining material in front of it.

[0010]

[Function] The wall structure is rich in rigidity because it contains a solidifying agent, and by containing short fibers, it has resistance to tensile load.
Since it is installed in front of the earth retaining material, basically no earth pressure acts on the wall structure. Therefore, the slope formed by the wall structure has a stable structure that is unlikely to be deformed.

On the other hand, since the wall structure is a mixture of soil,
A favorable landscape can be obtained by applying vegetation to the surface.

[0012]

Embodiments of the present invention will be described with reference to FIGS.

When embankment is formed by this method, the earth retaining material 1 wound with the reinforcing material 2 is first placed inside the planned slope surface position as shown in FIG.
Lay the end 2A on the planned embankment.

For the soil retaining material 1, for example, crushed stone or sandbag is used. As the reinforcing material 2, a net is used when the earth retaining material 1 is made of a sandy material, and a water permeable sheet is used when the earth retaining material 1 is made of a clay material. .

After arranging the soil retaining material 1, embankment is performed inside the soil retaining material 1. Then, when the embankment reaches the height of the earth retaining material 1, another earth retaining material 1 wound with the reinforcement material 2 is piled on the earth retaining material 1 in the same manner, and the end 2A of the reinforcement material 2 is placed on the embankment. Lay it on the ground and embank it again.

The above operation is repeated until the embankment reaches the one-time construction height of the wall structure 3 described later. This allows
The end portion 2A of the reinforcing member 2 is embedded in layers in the embankment.

After this series of embankment work is completed, the wall structure 3 is next constructed so as to contact the front surface of the earth retaining material 1.

In constructing the wall structure 3, first the form 4
2 is erected at a position separated from the earth retaining material 1 by the wall thickness of the wall structure 3 as shown in FIG.

Next, a wall material in which the solidifying agent and the short fibers are mixed in the generated soil is generated on site. As the solidifying agent, cement type is used when the generated soil is sandy soil and lime type is used when the generated soil is cohesive soil. As the short fiber, a petrochemical fiber having elasticity of about 10 cm and a diameter of several tens of microns is used.

The produced wall material is put between the earth retaining material 1 and the form 4, and compacted by human power. Further, the drain pipe 5 is laid across the wall structure 3. In addition,
The height of the wall structure 3 to be constructed in one step is determined in advance, and about half of the reinforcing bar 6 for shearing resistance is vertically embedded in the top end of the structure 3 serving as a joint of wall materials.

After the construction of the wall structure 3, the earth retaining material 1 and the reinforcing material 2 are further used for embankment on the embankment, and then the wall structure 3 is applied again on the skeleton of the wall structure 3.

In this way, the embankment work and the construction of the wall structure 3 are repeated up to the expected embankment height, and the formwork 4 is finally removed to complete the embankment having a steep slope.

Next, the operation will be described.

The wall structure 3 solidified by the solidifying agent has high rigidity, and the short fibers contained in the wall structure provide resistance against tensile load. Therefore, the wall structure 3 has a deformable and hard structure, and also embankment. Since the earth pressure is mainly supported by the frictional force between the reinforcing material 2 and the embankment material, the wall structure 3 is basically not affected by the earth pressure even on a steep slope. Further, since the reinforcing material 2 is not exposed to the outside, it is less likely to deteriorate due to ultraviolet rays or the like. Further, groundwater in the embankment passes through the reinforcing material 2 and the earth retaining material 1 and then flows from the drain pipe 5 to the wall structure 3
Since it is discharged to the outside of the wall structure, there is no fear that a large groundwater pressure acts on the wall structure 3.

Therefore, the slope formed by the wall structure 3 is extremely stable even with a steep slope and has sufficient durability.

Since the wall structure 3 uses the generated soil as the main constituent material, it is possible to vegetate the wall surface by mixing seeds at the time of construction. Therefore, a natural and pleasing landscape can be obtained.

[0027]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the end portion of the reinforcing material in which the soil retaining material is wound is laid in layers in the ground according to the embankment, and the wall structure is composed of the mixture of the soil, the solidifying agent and the short fibers. Since the object is constructed in contact with the front of the earth retaining material, a slope that is rigid and hardly deformed can be obtained, and vegetation can be applied to the wall surface by mixing seeds into the material for constructing the wall structure. Therefore, there is an effect of improving both stability and aesthetics of a steep slope.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embankment showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of an embankment and a wall structure under construction.

[Explanation of symbols] 1 earth retaining material 2 reinforcing material 2A end portion 3 wall structure

Claims (2)

[Claims] 1. An end portion of a reinforcing material in which an earth retaining material is wound is laid in a layer in an embankment, and a wall structure composed of a mixture of soil, a solidifying agent and short fibers is provided in front of the earth retaining material. A method of constructing a steep slope embankment, which is constructed by contacting with the ground. 2. A wall structure constituting a steep slope embankment slope, which is composed of a mixture of soil, a solidifying agent and short fibers, and which has a steep slope embankment slope.