KR101390354B1 - Method for stabilizing forest hillslope and siffening structure thereof - Google Patents

Abstract

Disclosed are a method for stabilizing a hillslope and a stiffening structure thereof. The present invention is realized through a process of joining a geogrid to an exposed rock slope exposed relative to a cut rock slope (latent weak section or an object to be rapidly repaired), which is formed at the time of establishment of forest road, using a fixing means. Moreover, the present invention further includes a stabilizing method by installing a stepped pocket-type geogrid mound layer inside a filling slope of a forest road. According to the present invention, provided is the method for stabilizing a hillslope and a stiffening structure thereof which can prevent the small-sized cut slope and the mound slope around the forest road from being collapsed by virtue of the installation of the geogrid and which are economic and eco-friendly. [Reference numerals] (AA) Bedrock

Description

Method for Stabilizing Forest Hillslope and Siffening Structure

The present invention relates to a mountain slope stabilization method and mountain slope reinforcement structure, and more particularly, through the installation of geogrid (ecogrid) through the installation of geogrid (eco-economical and eco-friendly mountain slope stabilization to prevent the collapse of small cuts and embankment slope around the mountain region) It relates to a construction method and its reinforcement structure.

1 is a view showing a slope state around a mountain road in the prior art. As shown in Figure 1, for the purpose of smooth development and use of forest resources, forest roads 20, such as the working and trunk roads are established every year in the mountains.

On the other hand, mountain forests formed as shown in Figure 1 is a trend that the occurrence of slope collapse and landslides in the cut slope 10 and the fill slope 30 in contact with the forest road due to the heavy rain and the like during the summer season. Slope decay and landslides in the mountain area is a major cause of large-scale soils as the landslide material flows into the valleys, and most people's lives and property damages caused by mountain disasters are reported to be caused by soils.

The cut slope 10 formed by artificially cutting the weathered soil layer, the banded soil layer, and the weathered rock at the time of opening the mountain road is exposed to most base rock including some soil layers, and the cut slope 10 is 45 degrees or more. If formed at an elevated angle, there is a possibility of local collapse such as falling rocks and disintegration in the section where the cracks are developed in the cut-off bedrock, as well as the discontinuities of the bedrock (slicing, stratification, fault, fractured zone, etc.) for a long time. Occurrence of falling rocks and disintegration due to weathering as a result of exposure to the atmosphere acts to reduce the stability of the cut slope.

On the other hand, in the slope slope 30 constructed by using the soil cut in the lower part of the road, it is highly likely to proceed with the gradual collapse of the slope slope due to scour or rainfall runoff during rainfall, Loss, scour, and small-scale sedimentary slopes, etc., occur frequently, which acts as a starting point for large-scale landslides and soils.

Such collapse of mountain slopes may not only act as a cause of impairing forest function for continuous use of forest resources, but may also act as a factor, directly or indirectly, to increase landslides and civil disasters.

Meanwhile, in the case of the conventional slope protection facility, the cut slope 10 formed of the rock is applied with a rockfall prevention net, a rockfall prevention fence, and the sediment slope 30 is generally applied to vegetation greening, concrete retaining walls, and the like. Most of these methods are applied to large slopes or roadside slopes.However, in case of small slopes such as mountain roads (20), installing rockfall protection nets and vegetation greenery is a cost-benefit problem, Due to the complex problems of construction and construction, the reality is that they are left unattended when they are opened.

Accordingly, an object of the present invention is to provide an economical and eco-friendly forest slope slope stabilization method for preventing collapse in small and potentially weak areas or cut slopes requiring emergency recovery through installation of geogrids. The reinforcing structure is provided.

Mountain slope stabilization method according to the present invention for achieving the above object, (a) cutting the hill slope to expose the rock slope; And (b) installing a geogrid on the exposed rock slopes.

Preferably, the step (b) is characterized in that it comprises the step of binding the geogrid to the rock slopes using a fixing means.

In addition, the step (b) is characterized in that the fixing means is installed at the connection site with the other geogrid installed adjacent to the geogrid.

In addition, the step (b) is characterized in that the fixing panel is installed on the connection portion of the geogrid, and the fixing means is installed on the fixing panel.

Meanwhile, the hill slope reinforcing structure according to the present invention includes a geogrid installed on a rock slope exposed by cutting the hill slope.

Preferably, the geogrid is bound to the rock slopes using fastening means.

In addition, the fixing means is characterized in that the fixing means is constructed at the connection site with the other geogrid installed adjacent to the geogrid.

In addition, the fixing panel is installed on the connection part of the geogrid, characterized in that the fixing means is installed on the fixing panel.

On the other hand, the hill slope stabilization method according to the present invention, (a) providing a first geogrid layer on the hill slope; (b) constructing a first fill layer on top of the first geogrid layer; (c) installing a second geogrid layer on the first fill layer; And (d) constructing a second fill layer on the second geogrid layer.

Preferably, after the step (a), before the step (b), further comprising the step of fixing the first geogrid layer to the slope by using a fixing means.

In addition, after the step (b) and before the step (c), by folding the projection portion of the first geogrid layer to the outside of the first fill layer in a pocket, the top of the first fill layer is superimposed. It further comprises the step of making.

Further, after the step (c) and before the step (d), the fixing means is secured to the second geogrid layer in a state where the first geogrid layer and the second geogrid layer stacked on top of the first fill layer are stacked. And inserting the geogrid layer and the first geogrid layer through the first fill layer.

In addition, after the step (d), (e) folding the protrusion of the second geogrid layer to the outside of the second fill layer in a pocket manner, so as to overlap the top of the second fill layer. It includes more.

The method may further include fixing (f) the second geogrid layer overlying the second fill layer to the second fill layer using fixing means.

On the other hand, the hill slope reinforcement structure according to the present invention, the first geogrid layer provided on the hill slope; A first fill layer constructed on the first geogrid layer; A second geogrid layer disposed on the first fill layer; And a second fill layer constructed on the second geogrid layer.

Preferably, the method further comprises fixing means for fixing the first geogrid layer to the slope.

In addition, the protruding portion of the first geogrid layer to the outside of the first fill layer is folded up in a pocket, it is characterized in that the top of the first fill layer is superimposed.

In addition, the second geogrid layer and the first geogrid layer is fixed on the first fill layer in a state in which the first geogrid layer and the second geogrid layer stacked on top of the first fill layer are stacked. It characterized in that it further comprises a fixing means for.

In addition, the projecting portion of the second geogrid layer to the outside of the second fill layer is folded up in a pocket, characterized in that it is superimposed on the top of the second fill layer.

The method may further include fixing means for fixing the second geogrid layer superimposed on the second fill layer to the second fill layer.

According to the present invention, an economical and environmentally friendly mountain slope slope stabilization method and its reinforcing structure are provided to prevent the collapse of cut and fill slopes in small potential vulnerable areas or emergency recovery around the forest road through the installation of geogrid. do.

In addition, according to the present invention, by effectively protecting the function of the forested forest road from disasters such as landslides, it is possible to continuously maintain the forest road for the utilization and development of forest resources

In addition, according to the present invention, it can have the effect of reducing the management cost of the vulnerable areas of continuous roads resistant to disasters for small cut slopes and land slopes around the mountain roads.

1 is a view showing a slope state around a mountain road in the prior art,
2 is a view illustrating a hill slope stabilization method for a cut slope around a forest road in accordance with the present invention;
3 is an enlarged view of a region 'A' of FIG. 2 and illustrates an installation state by a fixing means of a geogrid;
4 is a view showing a cutout around a forest road in which the geogrid is installed according to the present invention;
FIG. 5 is an enlarged view of the 'B' region of FIG. 4 and shows an installation structure of fixing means at the connecting portion of the geogrid; FIG.
6 to 9 are views illustrating an execution process of the hill slope stabilization method for the fill slope around the forest road according to the present invention, and
10 is a view showing the structure of the fill slope around the forest road constructed according to the slope stabilization method according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

2 is a view for explaining the forest slope slope stabilization method for the cut slope around the forest road in accordance with the present invention. As shown in FIG. 2, in the hillside slope slope stabilization method for the cut slope 10 around the forest road 20 according to the present invention, geogrid: 100 will be fixed using the fixing means 200, such as anchor bolts for binding the base arm.

Geogrid 100 is made of a lattice structure using a polymer material has a high stiffness, and has a very small strain strain even under long-term ground load. In addition, the geogrid 100 is a material having a strong durability against environmental changes, in the present invention, the geogrid 100 was used for the first time in order to stabilize the cut slope 10 around the forest road 20.

3 is a view showing the installation state by the fixing means of the geogrid in Figure 2, the insertion of the fixing means 200 to the base arm at regular intervals, the geogrid 100 is a cut-out surface around the forest road 20 It shows the state installed in close contact with (10).

On the other hand, in the practice of the present invention, the anchor bolt for fastening the base rock, which is the fixing means 200, after drilling the rock with a rock core drill or the like and binding the geogrid 100 to the base rock, it is desirable to integrate with the base rock. will be.

In addition, in the practice of the present invention, the anchor bolt for anchoring the bedrock which is the fixing means 200 may be provided with a departure preventing groove so as not to be separated from the bedrock even if a rockfall or the like occurs.

Figure 4 is a view showing a cut slope around the forest road in which the geogrid is installed according to the present invention. As shown in FIG. 4, the geogrid 100 may be installed only in a potential weak section, which is a discontinuous surface including a joint, a delamination, a fault, a crushing zone, and the like, and is not installed in a stable section without the discontinuous surface.

On the other hand, in the present invention by using the geogrid 100 that can be produced, cut, and connected in various shapes and sizes, the construction site (potentially weak section) determined according to the site conditions, such as the topography and geological conditions of the cut slope 10 By allowing flexible installation according to the shape and area, the installer can perform optimal construction economically and quickly.

On the other hand, if the potential weak section is wide, but a plurality of geogrid 100 is connected and installed, in this case, by additionally constructing the fixing means 200 in the connection portion of the geogrid 100, the cutting surface of the geogrid 100 ( It may be desirable to increase the degree of adhesion to 10) and at the same time allow the plurality of geogrids 100 to behave as a single body.

5 is a view showing the installation structure of the fixing means at the connecting portion of the geogrid. As shown in FIG. 5, in installing the fixing means 200 at the connection portion of the geogrid 100, by installing a fixing panel 250 such as a plate on the connection portion of the geogrid 100, the geogrid 100 is connected to each other. After fixing the mutual movements, it may be desirable to allow the fixing means 200 to be inserted into the base arm through the fixing panel 250.

As such, as the fixing means 200 is installed after the connection portion of the geogrid 100 is in close contact with the base arm through the fixing panel 250 having a relatively larger area than the fixing means 200, the plurality of geogrids 100 are provided. ), The adhesion to the bedrock can be further increased.

6 to 8 are views illustrating an execution process of the mountain slope stabilization method for the fill slope around the forest road in accordance with the present invention.

Referring to Figure 6 to 8, when explaining the hill slope stabilization method for the fill slope 30 around the forest road 20 according to the present invention, first, the contractor to fill the fill layer on the slope to be covered as shown in FIG. Before construction, the geogrid 100 is installed, and the first geogrid layer 110 is constructed by fixing the geogrid 100 to the inclined slope using a fixing means 200 such as an anchor pin.

Next, the contractor performs the first fill on the first geogrid layer 110 as shown in FIG. 6, thereby constructing the first fill layer 31 and then the first fill layer of the first geogrid layer 110. The protruding portion outside the end of 31 is folded up to pocket-end the end of the first fill layer 31 and the top of the first fill layer 31.

Accordingly, the first geogrid layer by the builder by fixing the first geogrid layer 110 stacked on top of the first fill layer 31 on the first fill layer 31 using the fixing means 200, 110 is pocket-fixed to the first fill layer 31.

Next, the contractor installs the second geogrid layer 120 on the first fill layer 31 and the first geogrid layer 110 as shown in FIG. 7, and thus, the first geogrid layer 110 and In a state in which the second geogrid layer 120 is stacked, the fixing means 200 is inserted through the second geogrid layer 120 and the first geogrid layer 110 to be installed on the first fill layer 31. .

Next, the contractor performs a second fill on the second geogrid layer 120 as shown in FIG. 7, thereby constructing the second fill layer 32 and then the second fill layer of the second geogrid layer 120. The protruding portion outside the end of 32 is folded up to pocket-end the end of the second fill layer 32 and the top of the second fill layer 32.

Accordingly, the contractor fixes the second geogrid layer 120 stacked on top of the second fill layer 32 to the upper portion of the second fill layer 32 using the fixing means 200, thereby providing the second geogrid layer. 120 is pocket-fixed to the second fill layer 32.

Next, the contractor installs the third geogrid layer 130 on the second fill layer 32 and the second geogrid layer 120 as shown in FIG. 8, and thus, the second geogrid layer 120 In a state in which the third geogrid layer 130 is stacked, the fixing means 200 is inserted through the third geogrid layer 130 and the second geogrid layer 120 to be installed on the second fill layer 32. .

Next, the contractor performs the third fill over the third geogrid layer 130 as shown in FIG. 8, thereby constructing the third fill layer 33 and then the third fill layer of the third geogrid layer 130. The protruding portion outside the end of 33 is folded up to pocket-end the end of the third fill layer 33 and the top of the third fill layer 33.

Accordingly, the third geogrid layer by the builder fixing the third geogrid layer 130 superimposed on the third fill layer 33 by using the fixing means 200, the third geogrid layer 130 is pocket-fixed to the third fill layer 33.

On the other hand, by repeating the laminated construction of the geogrid layer and fill layer described with reference to Figure 6 to the required height in accordance with the site conditions, to complete the construction of the fill slope 30 as shown in FIG. On the other hand, in the practice of the present invention, it will be preferable to compact each so that the fill layer is approximately 50cm.

10 is a view showing the structure of the fill slope around the forest road constructed according to the slope stabilization method according to the present invention. In the present invention, as shown in Figure 10, in the construction of each geogrid layer on the lower road slopes 23, the geogrid layer to a point beyond the base surface boundary of both sides of the embankment slope 30 in a predetermined ratio By constructing this installation, it will be desirable to further increase the stability of the fill slope (30).

On the other hand, in the present invention, by using the geogrid 100 that can be manufactured, cut, and connected in various shapes and sizes, the construction can be made flexible according to site conditions, such as the topography and geological conditions of the fill slope 30, Economical and quick construction can be optimized.

On the other hand, in the present specification has been described with respect to the cut slopes and land slopes around the mountain roads, for example, the present invention is not limited to the slopes around the mountain roads, it will be applicable to both cut slopes and land slopes formed in the mountains.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

Furthermore, the terms used in the present invention are used only to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

10: cutting slope, 20: forest road,
30: fill slope, 100: geogrid,
200: fixing means, 250: fixing panel.

Claims (20)

delete delete delete delete delete delete delete delete (a) installing a first geogrid layer on a hill slope;
(b) constructing a first fill layer on the first geogrid layer and compacting the first fill layer to a predetermined height;
(c) installing a second geogrid layer on the first fill layer; And
(d) constructing a second fill layer on the second geogrid layer, and compacting the second fill layer to a predetermined height;
Including;
The first geogrid layer is installed up to a point exceeding the interface between the first soil layer and both sides of the first soil layer in a predetermined ratio, and the first geogrid layer is fixed to the primary soil adjacent to the first soil layer using fixing means.
Wherein the second geogrid layer is installed to a point exceeding the interface with the base paper on both sides of the second fill layer at a predetermined ratio, and the second geogrid layer is fixed to the base paper adjacent to the second fill layer using fixing means. Phosphoric acid slope stabilization method.
10. The method of claim 9,
After the step (a), before the step (b)
And stabilizing the first geogrid layer on the slope using fixing means.
10. The method of claim 9,
After step (b), but before step (c),
And folding the protrusion of the first geogrid layer to the outside of the first fill layer in a pocket manner so as to overlap the upper portion of the first fill layer.
12. The method of claim 11,
After the step (c), before the step (d)
In a state where the first geogrid layer and the second geogrid layer stacked on top of the first fill layer are stacked, a fixing means penetrates through the second geogrid layer and the first geogrid layer, and the first fill layer Mountain slope slope stabilization method further comprising the step of inserting the installation.
10. The method of claim 9,
After the step (d)
and (e) folding the protrusion of the second geogrid layer to the outside of the second fill layer in a pocket manner so as to overlap the upper portion of the second fill layer.
14. The method of claim 13,
and (f) fixing the second geogrid layer superimposed on the second fill layer to the second fill layer using a fixing means.
A first geogrid layer disposed on the slope of the mountain;
A first fill layer installed on the first geogrid layer and compacted to have a predetermined height;
A second geogrid layer disposed on the first fill layer; And
The second fill layer is installed on the second geogrid layer, compacted so as to be the predetermined height
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The first geogrid layer is installed up to a point exceeding the interface between the first soil layer and both sides of the first soil layer in a predetermined ratio, and the first geogrid layer is fixed to the primary soil adjacent to the first soil layer using fixing means.
Wherein the second geogrid layer is installed to a point exceeding the interface with the base paper on both sides of the second fill layer at a predetermined ratio, and the second geogrid layer is fixed to the base paper adjacent to the second fill layer using fixing means. Phosphoric acid slope reinforcement structure.
16. The method of claim 15,
The hill slope reinforcement structure of claim 1, further comprising fixing means for fixing the first geogrid layer to the slope.
16. The method of claim 15,
Protruding portion of the first geogrid layer to the outside of the first fill layer is folded up in a pocket, superimposed on the top of the first fill layer, slopes reinforcement structure.
18. The method of claim 17,
A fixing fixing the second geogrid layer and the first geogrid layer on the first fill layer in a state in which the first geogrid layer and the second geogrid layer stacked on top of the first fill layer are stacked Mountain slope reinforcement structure further comprising means.
16. The method of claim 15,
Protruding portion of the second geogrid layer to the outside of the second fill layer is folded up in a pocket, superimposed on the top of the second fill layer, mountain slope reinforcement structure.
20. The method of claim 19,
And a fixing means for fixing the second geogrid layer superimposed on the second fill layer to the second fill layer.

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