KR20210022295A - Breast wall structure and method for constructing the breast wall structure - Google Patents

Abstract

According to an embodiment of the present invention, a retaining wall structure comprises a plurality of construction units forming a front side of a retaining wall and a net member buried in a rear side of the construction unit. The retaining wall structure comprises: a first construction unit; a second construction unit disposed on a lower side of the first construction unit; a fixing means interposed between the first construction unit and the second construction unit; and a net member buried in a rear side of the retaining wall while a portion of the net member is inserted or fixated into the fixing means. The fixing means comprises: a support body disposed between the first construction unit and the second construction unit; an upper support rod extended from the support body to an upper side; a lower support rod extended from the support body to a lower side; an upper fixing unit formed in the upper support rod to penetrate and be inserted into a lower surface of the first construction unit; and a lower fixing unit formed in the lower support rod to penetrate and be inserted into an upper surface of the second construction unit.

Description

Construction method for retaining wall structure and retaining wall structure {Breast wall structure and method for constructing the breast wall structure}

The present invention relates to a retaining wall structure, and to a retaining wall structure capable of further securing the stability of the retaining wall while extremely reducing the amount of geogrid installed in the backfill layer.

In general, a retaining wall refers to a structure installed in an area where soil collapse easily occurs due to soil pressure, such as on the side of a road or at the foot of a mountain, so as to prevent soil loss and secure its solidity and stability. .

Currently, the installation methods and types of retaining walls are very diverse, and the most traditional method is to install a steel net on the construction site and then inject the mixed concrete to solidify it. However, this method has a disadvantage that the construction period is inevitably longer because the construction scale is very large, the construction difficulty is also high, and the time for the mixed concrete to solidify is relatively long.

In general, when constructing a retaining wall, the soil does not exhibit a certain strength on its own, unlike concrete or steel rocks, so various reinforcing materials with high tensile strength are used inside the soil to increase its adhesion to produce reinforced soil. Afterwards, the retaining wall structure is constructed using such reinforced soil.

That is, the surface of the slope is also reinforced with a reinforced concrete structure, a reinforced soil retaining wall structure, etc. The double reinforced soil retaining wall structure is to stack retaining wall blocks and retaining wall panels in front of the original slope, and the reinforcement soil (backfill aggregate) is filled in layers between the retaining wall block and the original slope. In order to reinforce the stability of the embankment part by the reinforced soil, a method of increasing the interlayer friction of the backfill aggregate by installing a geogrid between the layers of reinforced soil is commonly used.

Since the geogrid used in the prior art is laid over the entire area of the reinforced soil layer, the cost required for the geogrid increases significantly, and when the use of the expensive geogrid is reduced, there is a problem that the stability of the embankment area is greatly degraded due to the reduction of interlayer friction.

The present invention can further improve interlayer stability while extremely reducing the amount of geogrid used to improve the stability of the retaining wall structure, as well as a fixing member for strengthening the coupling between the conventional retaining wall blocks (building units in the present invention) A retaining wall structure and its construction method that can significantly reduce construction costs while promoting stability by making a member for fixing the and geogrid possible as a single member is proposed.

The retaining wall structure according to the present embodiment is a retaining wall structure comprising a plurality of building units forming a front of the retaining wall, and a net member buried behind the building unit, wherein the first building unit and the first building unit A second construction unit disposed below the unit, a fixing unit interposed between the first construction unit and the second construction unit, and a net member embedded in the rear of the retaining wall while partially inserted or fixed to the fixing unit. And the fixing means includes a support body disposed between the first construction unit and the second construction unit, an upper support rod extending upward from the support body, and a lower support rod extending downward from the support body And an upper fixing part formed on the upper support rod and inserted through the lower surface of the first building unit, and a lower fixing part formed on the lower support rod and inserted through the upper surface of the second building unit.

According to an embodiment of the present invention, since a part of the geogrid is fixed by a fixing means, together with the binding of the construction unit of the upper floor and the construction unit of the lower floor through the fixing means, a member for binding the construction unit There is no need to provide a separate member for fixing the geogrid and.

In addition, it is possible to significantly reduce the amount of use of the geogrid during construction, so there is an advantage in that construction costs can also be significantly reduced.

1 is a view showing a cross section of a retaining wall structure constructed according to the present embodiment.
2 is a view for showing a state in which the construction unit and the geogrid are combined through a fixing means according to the present embodiment.
3 is a view for explaining the relationship between the vertical construction unit and the geogrid according to the present embodiment.
4 is a view for explaining a method of embedding a geogrid according to another embodiment of the present invention.
5 and 6 are views for explaining the fixing means according to the present embodiment.

Hereinafter, with reference to the accompanying drawings with respect to the present embodiment will be described in detail. However, the scope of the spirit of the invention of this embodiment may be determined from the matters disclosed by this embodiment, and the idea of the invention of this embodiment is implementation of the addition, deletion, change, etc. of constituent elements with respect to the proposed embodiment. It will be said to include transformation.

The suffixes "module" and "unit" used in the description related to the present invention are given or used interchangeably in consideration of only the ease of writing the specification, and do not have meanings or roles that are distinguished from each other by themselves.

1 is a view showing a cross-section of a retaining wall structure constructed according to the present embodiment, and FIGS. 2 and 3 are views showing cases in which a sub-reinforcing member having a length shorter than that of a net member extending rearward according to the present embodiment is configured to be.

First, in the retaining wall structure according to the present invention, a plurality of construction units are constructed in a horizontal direction and a vertical direction, and a geogrid for increasing friction between the rear reinforced soil layers is fixed between the corresponding construction units. Since the construction unit and the geogrid are fixed by a single fixing means 200, not a separate fixing member, separate construction units between the construction units in the vertical direction and between construction units in the horizontal direction to fix the position of the construction units. There is no need to install fixing members.

In the description of the present invention, the geogrid includes members such as nets or nets of various materials in addition to the well-known geogrid, and hereinafter, it is made of a grid such as a net or net including a geogrid to provide frictional force when compacting reinforcing soil. The configuration will be collectively referred to as the net member.

In detail, referring to FIG. 1, a plurality of construction units 1 are stacked in a vertical direction to form the front surface of a retaining wall structure, and a net member 10 of this embodiment is buried between the construction units 1 in the vertical direction. . The net member 10 is fixed between the construction units 1 by a fixing unit 200, and the fixing unit 200 also serves to bind the construction units in the vertical direction.

The net member 10 may be buried in each of the construction units in the vertical direction, but as shown, it may be buried for every several layers of the construction unit. The net member of the present embodiment may be used by cutting a plurality of geogrids, which are conventional net members. That is, the existing rectangular geogrid can be finely cut at predetermined intervals and used as the net member of the present embodiment, and even a small amount can provide sufficient stability according to the structure of the present invention.

Meanwhile, in the following description, the direction in which the net member 10 is buried and extended based on the building units 1 is referred to as the rear of the retaining wall structure, and the opposite direction is referred to as the front of the retaining wall structure.

As shown in FIG. 1, the building units 1 are built in a horizontal direction as well as in a vertical direction, and when viewed from the front, a retaining wall is formed by the building units.

The horizontal construction unit 1 is a plurality of sand bags or dirt bags stacked on the ground, and the vertical construction unit 1 is a plurality of sand bags or dirt bags stacked on the horizontal construction unit. The construction unit 1 is made of a durable geotextile material and a fabric made of a material that allows water to flow through the construction unit 1 and germinate seeds. The construction unit in the present embodiment may be understood as a tong filled with soil or sand.

On the other hand, referring to FIGS. 2 and 3, although the size of the building unit 1, which is a tonang according to the present embodiment, is small, as a retaining wall structure, a sub-reinforcing member 50 having a small length to sufficiently withstand earth pressure such as reinforced soil from the front ) Is composed.

The sub-reinforcing member 50 may also be used by cutting a plurality of geogrids, which are the existing net members, but it is also possible to use a fabric material such as a nonwoven fabric or a woven fabric. Not only the net member 10 corresponding to the main reinforcing member, but also the sub-reinforcing member 50 having a small length, provides frictional force to the reinforcing soil and promotes structural stability. However, the sub-reinforcing member 50 reinforces the support for each construction unit so that the construction units do not collapse forward by the earth pressure at the rear even when the retaining wall is constructed using the construction units 1 of a small size. Play a role.

The sub-reinforcing member 50 may be used by cutting the net member 10, and a separate non-woven or woven fabric material may be used.

The sub reinforcing member 50 also has a size/width that can only be placed on a single building unit, thereby providing individual support to each of the building units.

In the case of the fixing means, it may be installed in a zigzag arrangement according to the size of the construction unit and the position of other fixing means, or may be installed on the same vertical line.

4 is a view for showing a state in which the construction unit and the geogrid are combined through a fixing means according to the present embodiment.

And, FIG. 5 is a view for explaining the relationship between the geogrid and the vertical construction unit according to the present embodiment.

Referring to Figure 4, the net member 10 of the present embodiment is made of a size that can be located only on a single building unit (1). That is, the reinforcement soil is not formed in a size that can span the entire area where the reinforcement soil is compacted behind the retaining wall structure.

In order to improve the stability of the retaining wall structure while relatively largely reducing the size of the geogrid, the width of each net member 10 is made of a size smaller than the horizontal length (long side) of the single building unit 1. That is, each construction unit 1 is formed in a rectangular shape having a short side and a long side, and the net member 10 is located on the construction unit 1 so as not to deviate from the upper surface of a single construction unit 1, The size is also formed to have a width of a size smaller than the long side of the building unit (1).

In this way, since the net member 10 is located on the upper surface of each building unit 1, and the width is smaller than the long side of the building unit 1, there is no geogrid between each net member 10 and reinforced soil. A void area A is formed in which is immediately located. Even if such a void area (A) is formed, the reinforced soil layer is compacted/adhered by the geogrid on the left and right sides, and the frictional force caused by the geogrid in the vertical direction is sufficiently generated, so that the overall stability of the retaining wall structure is improved.

In this regard, referring to FIG. 5, the construction unit 1 of the upper layer disposed on the construction units 1a located on the lower floor is constructed over the two construction units 1a on the lower floor, and the construction unit located at the lower floor. (1a) is shown by a dotted line.

Accordingly, the lower net member 13 buried on the lower building unit 1a is located between the upper geogrids 11 and 12. In addition, the reinforcing soil compacted in the void area A between the upper net members 11 and 12 is in close contact with the upper net members 11 and 12 on the left and right, as well as friction by the lower net members 13, not shown. Frictional forces are also generated by geogrids at higher positions that are not. Therefore, each of the reinforced soil layers has a structure in which geogrids are located in the vertical, left, and right directions, and through this structure, even if the amount of geogrid buried is reduced, it can sufficiently play a role as a stable retaining wall structure.

6 and 7 are views for explaining a method of embedding a geogrid according to another embodiment of the present invention.

6 and 7, one net member 10 is partially positioned on each building unit 1, and the net member 10 is fixed to the building unit 1 by a fixing means 20 do. Since the fixing means 20 has a structure in which a part of the fixing means 20 penetrates the construction unit 1 and enters the construction unit 1, the net member 10 has one end of the construction unit 1 by the fixing means 20 Is fixed to

Each of the net members 10 fixed through the fixing means 20 on the upper surface of the construction unit 1 are arranged rearward, and if these geogrids are called front and rear geogrids, these geogrids cross the front and rear net members 10. The left and right net members 21 and 22 can be further buried.

In addition, by installing the fixing means 20 in the region where the left and right net members 21 and 22 and the front and rear net members 10 overlap, the position of each geogrid can be more firmly fixed and the flow of the geogrid can be suppressed.

That is, the left and right net members 21 and 22 are partially disposed so as to cross at least one front and rear net members, and through this, stability as a retaining wall even if a small amount of net members (eg, wire mesh or geogrid) is used. Can be secured.

Meanwhile, the sub-reinforcing member may be installed across the left and right net members or the sub-reinforcing member 50 so that a portion of the sub-reinforcing member 50 is installed at a position shorter than that of the front and rear net members.

In the case of the void area (A) in which the net member 10 such as a geogrid or wire mesh does not exist, as shown in FIG. 7, four front, rear, left, and right sides are surrounded by adjacent net members, or the front and rear directions or left and right directions are adjacent to the adjacent net members. Because it is surrounded, it can be said to be a large-sized geogrid.

8 and 9 are views for explaining a fixing means according to the present embodiment, and FIG. 10 is a view for showing a fixing means according to another embodiment of the present invention.

Fig. 9 shows a fixing means 200 for fixing a geogrid whose width is smaller than the long side of the construction unit to the construction unit and enabling the speed of connection between the construction units.

The fixing means 200 includes an upper fixing part 220 and a lower fixing part 230 that are respectively inserted and fixed to the two construction units in the vertical direction, and includes a support body 210 placed on the upper surface of the construction unit. do. In addition, an upper support rod 201 connecting the upper fixing part 220 and the support body 210, and a lower support rod 202 connecting the support body 210 and the lower fixing part 230. do.

Each of the upper fixing part 220 and the lower fixing part 230 is inserted into the construction unit through a cone ( corn) shape.

The upper fixing part 220 moves from the upper end toward the support body 210 so that it is easy to insert into the first construction unit located on the upper side of the support body 210 and is not easily removed after being inserted. It is made in a shape with a large thickness.

On the other hand, the lower fixing part 230 is the support body 210 at the lower end so that it is easily inserted into the second construction unit located at the lower side with respect to the support body 220 and is not easily removed after being inserted. The more it goes to the side, the larger the thickness is made.

The support body 210 is disposed between the first construction unit and the second construction unit disposed on the lower layer of the first construction unit, and connects the upper fixing part 220 and the lower fixing part 230, respectively. An upper support rod 201 and a lower support rod 202 are configured.

During the construction of the retaining wall, the geogrid is fixed in position by being caught by the upper support rod 201 or the lower support rod 202, and the upper fixing part 220 and the lower fixing part 230 are constructed as described above. It plays a role in interconnecting and combining them.

When constructing the retaining wall structure, after disposing the second construction unit of the lower layer, while placing the fixing means 200 on the second construction unit, the lower fixing part 230 of the fixing means 200 is attached to the second construction unit. Insert and fix inside the construction unit. In addition, after the geogrid is buried so that the upper support rod 201 passes through a part of the geogrid, the first building unit is inserted into the support body 210 so that the upper fixing part 220 is inserted into the lower part of the first building unit. ) On top.

Reinforcing soil is buried on the geogrid and the retaining wall structure is sequentially completed while the reinforcing soil is crushed.

However, the geogrid does not necessarily have to be disposed above the support body 210, and it is also possible to be disposed below the support body 210, that is, between the second construction units of the lower layer of the support body 210. Do.

On the other hand, in the case of the fixing means shown in Fig. 10, while being inserted into each of the construction units in the vertical direction to bind them, a net member such as a geogrid or a wire mesh is made more rigidly tied to the construction unit side, while the entire fixing unit It has a shape that can block the case of being inserted into the building unit.

An upper support rod 201 and a lower support rod 202 extending in the vertical direction are configured, and at one side of the upper support rod 201, an upper fixing part 220 having a shape that is easy to be inserted into the upper building unit is configured. And, at one side of the lower support rod 202, a lower fixing part 230 having a shape to be inserted into the lower construction unit is configured.

Further, it includes a binding reinforcing portion 240 formed to extend from the upper support rod 201 or the lower support rod 202 and has a bent portion.

The binding reinforcing part 240 is formed to be bent upward or downward while extending from the upper support rod 201 or the lower support rod 202 in a predetermined angle direction. Therefore, when the fixing means binds the building units in the vertical direction to each other and also binds the net member, a part of the net member is fixed by the binding reinforcing part 240 and the entire fixing means is inside any one building unit. It can prevent the case of going into.

Therefore, according to an embodiment of the present invention, the upper layer construction unit and the lower layer construction unit are bound through the fixing means, and a part of the geogrid is fixed by the fixing means, thereby preventing the binding of the construction unit. There is no need to separately provide a member for fixing the geogrid and a member for fixing the geogrid.

In addition, it is possible to significantly reduce the amount of use of the geogrid during construction, so there is an advantage in that construction costs can also be significantly reduced.

Claims (5)

As a retaining wall structure comprising a plurality of construction units forming the front of the retaining wall, and a geogrid buried in the rear of the construction unit,
A first construction unit,
A second construction unit disposed under the first construction unit,
A fixing means interposed between the first construction unit and the second construction unit,
While a part is inserted or fixed to the fixing means, it includes a net member buried in the rear of the retaining wall,
The fixing means includes a support body disposed between the first building unit and the second building unit, an upper support rod extending upward from the support body, a lower support rod extending downward from the support body, and the upper portion. A retaining wall structure comprising an upper fixing part formed on a support rod and inserted through a lower surface of the first construction unit, and a lower fixing part formed on the lower support rod and inserted through an upper surface of the second construction unit. As a retaining wall structure comprising a plurality of construction units forming the front of the retaining wall, and a geogrid buried in the rear of the construction unit,
A first construction unit,
A second construction unit disposed under the first construction unit,
A fixing means interposed between the first construction unit and the second construction unit,
While a part is inserted or fixed to the fixing means, it includes a net member buried in the rear of the retaining wall,
The fixing means includes an upper fixing portion having a shape insertable into the first construction unit, a lower fixing portion having a shape insertable into the second construction unit, an upper support rod connected to the upper fixing unit, and the A retaining wall structure comprising a lower support rod connected to a lower fixing portion, and a binding reinforcing portion formed extending from the upper support rod or the lower support rod and bent at a predetermined angle. The method according to claim 1 or 2,
The second construction unit is made of a shape having a long side and a short side,
The width of the net member is made of a size smaller than the long side of the second construction unit,
The net member is a retaining wall structure, characterized in that not disposed above the other building units adjacent in the horizontal direction of the second building unit. The method according to claim 1 or 2,
A retaining wall structure comprising: a front and rear net member partially disposed on the second construction unit; and a left and right net member disposed at the rear of the retaining wall so that a portion of the front and rear net member overlaps with each other. A method of constructing a retaining wall structure including a plurality of construction units forming a front of the retaining wall and a net member buried in the rear of the construction unit,
A process of arranging a second construction unit and installing a fixing means so as to penetrate the upper surface of the second construction unit,
A process of allowing the fixing means to penetrate the lower surface of the first construction unit while disposing the first construction unit on the upper side of the fixing unit; and
And a process of embedding a part of the net member between the second building unit and the first building unit so that a part of the net member is fixed by the fixing means,
The net member has a size smaller than the width of the first construction unit or the second construction unit and is constructed so as not to be located on another construction unit horizontally adjacent to the second construction unit,
The fixing means comprises an upper fixing part penetrating the lower surface of the first construction unit and a lower fixing part penetrating the upper surface of the second construction unit.

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