KR102069885B1 - Filter mat fixing method of levee body for using textile gabion - Google Patents

Abstract

The present invention relates to a method for constructing a filter rear part using a gabion for preventing the filter mat from being supported or lost by carrying and installing the gabion on a filter mat in a series of processes. The present invention comprises the steps of stacking the sandstone on the bottom surface on which the embankment is to be installed to form the body 100; Laying a covering stone 104 to protect the slope along the slope facing the sea of the body 100; And laying filter seats 108 for preventing the loss of landfill soil along the slopes facing the landfill of the body 100. In the construction of the levee, the construction can be completed within a limited low tide time. Before the filter mat 112 is installed, the gabion 120 made of a metal or fiber mesh with a filling stone composed of particles larger than the filter stone 108 is pre-operated so that the top of the body 100 is formed. Preparing to place on; Installing a filter mat (112) on an inclined surface on which the filter seat (108) is installed; And the gabion 120 prepared on the top of the body 100 on the inclined surface on which the filter mat 112 is installed so that the filter mat 112 is fixed to the inclined surface on which the filter seat 108 is installed without supporting the seawater. It provides a method for constructing the filter back portion using a gabion, characterized in that it further comprises;

Description

FILTER MAT FIXING METHOD OF LEVEE BODY FOR USING TEXTILE GABION}

The present invention relates to a method for constructing a filter rear portion using a gabion, and more particularly, when a filter mat is installed to prevent the landfill soil from leaking to the offshore side when a site is formed on the back of a coastal wall facility. Gabion to prevent the filter mat from floating due to water pressure acting on the filter mat according to the level of water level between the inside and the outside (filling stone in the mesh does not prevent the mesh from forming the shape of the gabion) The present invention relates to a method for constructing a filter rear part using a gabion to prevent the filter mat from being supported or lost by carrying and installing the filter mat in a series of processes.

In Korea, the three sides are surrounded by the sea, and the mountain area occupies 70% of the land, and the flatland is narrow. Efforts have been made to drain, reclaim land, and make land.

In the construction method of constructing a levee, the levee is constructed by first laying a large diameter stone on the sea floor and laminating a smaller diameter stone on top of it. In the past, the levee was constructed using only a stone, so it flowed to the landfill. As water enters the open sea through the gap between the stones and the dike, there is a problem that the landfill is lost along with the water, filling the gap with small particles of curbstone, gravel and sand.

Since the 1980s, in general, the installation of quaysides on the coast has provided filter seats and filter mats on the inside of the coastal facility to prevent not only the invasion of blue waves in the open sea but also the outflow of landfill soil to the open sea. However, the difference in water level is generated inside and outside of the shore due to the difference between the tides, and the hydraulic pressure acts on the installed filter mat. Conventionally, in order to prevent the flotation phenomenon of the filter mat, it is possible to install the back ground sand or the back sand, which is usually well-prepared, to prevent the filter mat from supporting, and then reclaim the soil or dump the dredged soil in the long term. Landfill.

However, in areas where the tidal difference is large, such as the west coast, even the first laid soils (back seats) do not withstand water pressure and are lost or flow down to the bottom, causing the filter mat to float or damage.

In particular, in the case of revetment of Incheon port, Pyeongtaek Dangjin port, Daesan port, Gunsan port, the above-mentioned failures have been experienced many times, and the filter land is not properly installed or damaged, and the soil is leaked in the long term. There is a situation.

The present invention has been made in order to solve the above problems, in response to the characteristics of the offshore work short working time due to the tidal atmosphere, to fully produce the gabion in advance, and to carry and load the manufactured gabion quickly and conveniently Through a series of processes to provide a method for construction of the filter back portion using a gabion so that it can be installed on the back of the filter mat faster than before.

In addition, when reinforcing the back soil (or back seat) that is able to withstand the water pressure acting on the filter mat to prevent the support of the filter mat, the slope of the reinforcement is increased to increase the construction volume because the slope must be smoothed for stability. In consideration of the high cost of construction and the increase of the construction period, and long-term loss of rear soil flowing down the slope, the filter mat is pulled down and damaged. It is to provide a method for constructing the filter rear part using the gabion prepared in advance to reduce the air and shorten the air.

In order to solve the above problems, the present invention comprises the steps of: stacking the sandstone on the bottom surface on which the embankment is to be installed; Laying a covering stone 104 to protect the slope along the slope facing the sea of the body 100; And laying filter seats 108 for preventing the loss of landfill soil along the slopes facing the landfill of the body 100. In the construction of the levee, the construction can be completed within a limited low tide time. Before the filter mat 112 is installed, the gabion 120 made of a metal or fiber mesh with a filling stone composed of particles larger than the filter stone 108 is pre-operated so that the top of the body 100 is formed. Preparing to place on; Installing a filter mat (112) on an inclined surface on which the filter seat (108) is installed; And the gabion 120 prepared on the top of the body 100 on an inclined surface on which the filter mat 112 is installed so that the filter mat 112 does not float in seawater and is fixed to the inclined surface on which the filter seat 108 is installed. It provides a method for constructing the filter back portion using a gabion, characterized in that it further comprises;

The filter seat 108 is provided in the form of a mixture of stones having a size of less than 100mm, by minimizing the air gap through the mixing of the soil is embedded in the inland sea is caught by the filter mat and filter stones to flow out to the sea To prevent them.

On the other hand, the filling stone to be filled in the gabion 120 is provided in the form of a mixture of stones having a size of 75mm or more and 200mm or less, the water pressure generated toward the inland sea when the sea water flows from the outer sea side to the inland sea side to form a void as possible By not acting on the gabions 120 as much as possible, the gabions 120 can be fixed and supported well without moving by the water pressure of the seawater.

Here, the step of installing the gabion 120 prepared on the top of the body 100 is: before the filter mat is installed, the crane (1) waits on the top end surface of the body 100 is disposed the gabion 120 Making; Walking up the gabion 120 with the crane 1 after laying the filter mat; Transporting the gabion 120 to the vicinity of a dropping place at the top of the body 100 by the crane 1 lifting the gabion 120; And dropping the gabions 120 sequentially from the bottom along the inclined surface on which the filter mat 112 carries the gabions 120. The crane 1 further includes: A first steel arm 5 installed in the crane 1, and a second steel arm 7 connected to an end of the first steel arm 5, wherein the second steel arm 7 It is relatively rotatable with respect to the first steel arm 5, the second steel arm 7 is rotatable about a longitudinal axis, and the gabion 120 is provided on one side of the second steel arm 7. Hanging projections or groove-shaped locking portion 18 is provided, the step of raising the gabion 120 with the crane (1), the mesh of the gabion 120 of the second steel arm (7) Or penetrating into the lifting rope to insert into the gabion; And lifting the second steel arm 7 in the vertical direction while the second steel arm 7 is rotated such that the locking part 18 faces upward, and the gabion 120 is attached to the locking part 18. Lifting the gabion 120 to take the upper or lifting rope of the; further comprising, the crane (1) to drop the gabion 120 along the inclined surface on which the filter mat 112 is installed The step may include: moving the gabion 120 caught by the second steel arm 7 to a dropping point on an inclined surface on which the filter mat 112 is installed, and arranging it obliquely so that the front end thereof is downward; And rotating the second steel arm 7 about the longitudinal axis at the dropping point so that the locking portion 18 faces downward, thereby making the gabion 120 smooth the upper portion of the second steel arm 7. It is characterized in that it further comprises a step of leaving the gabion 120 from the second steel arm (7) by flowing down by its own weight on the surface.

And, the step of laying the prepared gabion 120 on the top of the body 100: the gabion 120 caught on the second steel arm (7) from the bottom along the inclined surface on which the filter mat 112 is installed When laying one after another, several gabions 120 are differentially laid according to the distance between the point where the crane 1 is fixed and the point at which the gabions 120 are to be dropped in consideration of the overturning of the crane 1. However, the closer to the position of the crane (1) is characterized in that more gabions 120 are laid at once.

In addition, the second steel arm 7 is provided in the form of a rod having a circular cross section; Part of the outer surface is characterized in that it comprises a locking portion 18 provided in the form of an embossed projection or intaglio grooves to hang the gabion 120 along the longitudinal direction.

On the other hand, the step of laying the prepared gabion 120 on the top of the body 100: the crane (1) waits on the top end surface of the body 100 is placed the gabion 120 before the filter mat is installed Making; Walking up the gabion 120 with the crane 1 after laying the filter mat; Transporting the gabion 120 to the vicinity of a dropping place at the top of the body 100 by the crane 1 lifting the gabion 120; And dropping the gabions 120 sequentially from the bottom along the inclined surface on which the filter mat 112 carries the gabions 120. The crane 1 further includes: And a steel boom (40) having a telescopic structure that is rotatable about an axis, is rotatable about a longitudinal axis, and is telescopically stretchable in a longitudinal direction and is fastened to the crane (1). The outer member 46 of the 40 includes a projection 18 in the form of a protrusion to hang on one side, the step of lifting the gabion 120 by the crane 1, the steel boom ( 40) penetrating through the mesh or lifting rope of the gabions 120 and inserting the gabions 120; And rotating the steel boom 40 penetrated by the gabions 120 about a longitudinal axis so that the locking portion 18 faces upward and lifting the steel boom 40 in the vertical direction. And lifting up the gabions 120 to 18, wherein the crane 1 drops the gabions 120 along an inclined surface on which the filter mat 112 is installed. 40 extending side by side along the inclined surface on which the filter mat 112 is installed to fix the end of the steel boom 40 to the ground near the bottom of the inclined surface on which the filter mat 112 is installed; Rotating the steel boom 40 about a longitudinal axis so that the locking portion 18 is directed downward, so that the gabion 120 extends side by side along an inclined surface on which the filter mat 112 is installed. Riding on the smooth upper surface of the) so that it flows down by its own weight and is settled at the dropping point; And shortening the steel boom 40 in the longitudinal direction to separate the gabions 120 from the steel boom 40.

Here, the steel boom 40 is characterized in that each member constituting the telescopic structure is provided in the form of a pipe having a circular cross section.

In addition, the locking portion 18 of the steel boom 40 is provided on one surface of the outer member 46 by rotating only the outer member 46 of the steel boom 40 about its longitudinal axis independently. Characterized in that can change the direction of the heading.

According to the construction method of the filter rear part using the gabion of the present invention, the process of carrying the prepared gabion in the dike and laying on the filter mat is easier and simpler than the process of transporting and laying the existing sandstone, By making the process of transporting and laying more convenient, the construction can be carried out at a short time of low tide, making it possible to construct the levee more economically than the existing construction method.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

Figure 1a is a view showing a state in which the body is formed by stacking sandstone on the bottom surface where the embankment is to be installed,
1B is a view showing a state in which a coated stone is installed on the outer inclined surface of the embankment,
1C is a view showing a state in which a filter seat is installed on the inner inclined surface of the embankment,
Figure 2a is a view showing a state in which the filter mat is installed on the inclined surface of the filter seat;
2B is a view showing a state in which a filter mat is primarily fixed by laying soil or sand on an inclined surface on which a filter mat is installed;
Figure 2c is a view showing a state in which the gabion along the inclined surface on which the filter mat is installed, the filter mat is primarily fixed by installing the gabion side by side on the sea floor.
Figure 2d is a view showing a state in which the filter mat is first fixed by installing the gabion along the inclined surface in which the filter mat is installed side by side in the longitudinal direction side by side,
3 is a view showing a gabion made of a mesh made of a fiber material as an embodiment of the gabion,
Figure 4a is a view showing a state prepared by placing a gabion on the top of the body at high tide,
Figure 4b is a view showing a state in which the filter mat is installed on the inclined surface of the filter seat at low tide,
Figure 4c is a view showing a state in which the gabion laid on the inclined surface of Figure 4b,
5a is a view showing a crane used to lay gabions in one embodiment,
Figure 5b is a view showing an embossed locking portion of the crane of Figure 5a,
Figure 5c is a view showing an intaglio-shaped locking portion of the crane of Figure 5a,
5d is a view showing a state of laying gabions on the inclined surface of Figure 4b using the crane of Figure 5a,
6a is a view showing a crane used to lay gabions in one embodiment,
Figure 6b is a view showing an embossed locking portion of the crane of Figure 6a, and
FIG. 6C is a view showing a state in which gabions are laid on the inclined surface of FIG. 4B using the crane of FIG. 6A.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only this embodiment to complete the scope of the invention to those skilled in the art and complete the scope of the invention to those skilled in the art It is provided to inform you.

In the following description of the present invention with reference to Figures 1 to 6, the drawings are shown to explain the concept of the present invention may be somewhat different from the actual configuration, size, shape and the like shown in the drawings.

When building a site on the back of the coastal wall facility, as shown in Figure 1a first to build a levee along the coast to prevent the entry of seawater. The levee lays a large grained stone on the floor to install and builds a smaller grained stone on top of it. It builds a site by blocking seawater and draining the water inside with the built levee.

Looking at the constructed dike, a gap is formed between the four stones forming the dike, through which the water inside and outside the dike passes. When water is collected by various causes in the landfill formed by reclaiming the soil, the collected water flows out of the bank through the embankment, and the soil of the minute size constituting the landfill with the flowing water is also lost out of the embankment. Over time, soils constituting landfills are lost outside the banks, resulting in potholes (cavities) in landfills that can cause land to sink and collapse.

Therefore, when constructing the dike, water is allowed to pass through the slope of the dike facing the landfill, but a filter is required to prevent the sedimentation of the soil. In the past, since the embankment was constructed using stone, the gap was filled with a smaller-diameter sandstone than the air gap between the sandstones used to construct the embankment, as shown in FIG. 1C. Since 1980, as shown in FIG. The filter mat was used to block the cracks in the banks to prevent the migration and entry of microscopic soil.

Geotextiles have excellent performance as reinforcement materials and have various advantages such as increased watertightness due to the engineering characteristics of the geotextiles themselves, and the ability to block infiltration water. Geotextiles are mainly used as filter mats. Propylene and the like. However, geotextiles of these materials are less dense than water, so it is not easy to fix them on the installation surface because the filter mat is buoyant due to buoyancy when installing the filter mat in dredging landfill area.

In order to prevent this, as shown in FIG. 2B, a well-replaced back soil or a back stone is first installed on an inclined surface on which a filter mat is installed, and then the soil is buried in earnest after the filter mat is fixed. However, in areas with large tidal flats, even the first laid soils (back seats) are unable to withstand water pressure and are lost or run down to the bottom, causing the filter mat to float or damage. In addition, when reinforcing the back soil (or back seat) that can withstand the water pressure acting on the filter mat in order to prevent the support of the filter mat, the slope of the back soil (or the back seat) must be smoothed for stability. Therefore, there is a problem that the reinforcement cross section is increased, the construction volume is increased, the construction cost is expensive and the construction period is increased.

In view of this point, in the embodiment of the present invention to find a way to secure the filter mat using the gabion 120 prepared in advance in order to quickly complete the construction of the filter mat. Gabion 120 is a member that fills the filling stone of the size does not hinder the shape of the gabion 120 does not escape the inside of the mesh made of a variety of materials can play a role as a large rock flexible and pitchable It can prevent loss. The gabion 120 may be pre-fabricated separately from the installation of the filter mat, and the gabion 120 may be pre-loaded and placed in a place where the filter mat is to be installed by acting as one large rock, thereby reducing the air through the preliminary work. . In particular, due to the flexible nature of the gabions during loading or mounting, close contact between the loaded gabions is possible. In addition, the filling stone constituting the gabion 120 is confined in the net and acts as a structure, so there is no fear of being lost in the water. .

[Building of the embankment]

When the site is to be built on the backside of the coastal wall facility, the dike is constructed along the coast, and the soil is poured into the dike to reclaim the land.

Referring to Figure 1, the process of constructing the embankment, first, a large embankment stone of the same size as the rock is dropped to prepare the foundation of the embankment. At this time, if the seabed ground where the dike is constructed is fragile, the geotextile mat can be laid first, and then the ground can be dropped. When the base of the dike is provided, the size of the embankment is smaller than that of the embankment used to form the base of the embankment. The dike has stability when the cross section of the lower part is larger than the cross-sectional area of the upper part, and it is stable. It is preferable.

The outer inclined surface of the embankment faces the sea, and the inner inclined surface faces the landfill. Since the inner inclined surface is largely eroded by waves, the cladding 104 is dressed on the inclined surface to protect the inclined surface as shown in FIG. Install it as if it was coated. The stone used as the cladding 104 is large and the surface is certain, especially the coastal cladding 104 has to be large because it has to withstand the force of the waves, and it is preferable that the stone is piled up like a wedge.

Since the inner inclined surface is in contact with the dropped soil to form the landfill, filter mats are installed along the inclined surface to prevent the soil from being lost through the voids of the inclined surface. If the soil is buried on the back, the filter mat is easily damaged by the action of the load. In addition, it is not a fundamental countermeasure to prevent the loss of all the functions to prevent the loss of landfill soil by the filter mat alone. Accordingly, the filter seat 108 is installed at the bottom of the filter mat to prevent damage to the filter mat as well as to further prevent the loss of landfill soil embedded in the inland sea side.

As the filter stones 108, sandstones having a particle size of 100 mm or less are mixed and installed, which minimizes the voids in the filter stone layer so that the installed filter stones prevent the outflow of soil from the inland sea toward the open sea and serve as a filter for passing water. Of course, the surface on which the mixed filter stones of the small size are laid can be flattened so that the filter mat installed on the filter stone layer is not damaged. The filter seat 108 layer is configured to have a smaller pore with a smaller particle than the carcass seat so as to act as a filter, and to make the slope of the filter seat 108 uneven so that the filter mat is not damaged. It is preferable.

[Construction of Filter Back using Gabion]

Hereinafter, with reference to Figure 2 installs the filter mat 112 in the filter back portion and examines the construction method of the filter back portion for temporarily fixing it. Landfills formed by dropping soils continuously fluctuate according to the tides on the offshore side, and when water flows due to the level difference between the inside and outside of the dike, fine soils flow out of the gaps along the dike. To prevent this, it is necessary to install the filter seat 108 as shown in Figure 2a, as well as to install a filter mat 112 on the upper surface of the fine size of the soil to be surely prevented.

The filter mat 112 brought into the site is preferably stored by covering the bottom with a lumber or the like so as not to absorb moisture before construction and covering it with a waterproof cloth, etc., and transporting the filter mat 112 when the filter mat 112 is transported. Care should be taken not to cause defects or tearing, and the filter seat (108) before the filter mat 112 is installed so that the upper surface of the filter seat 108 is arranged to be a flat surface and then the filter mat 112 is in close contact.

As the filter mat 112, geotextiles, such as polyester and polypropylene, may be used, which is generally compacted to fix the installation surface as shown in FIG. Soil and sand can be laid first and fixed first. However, the soil or sand can not be stacked a lot on the top of the body 100, the filter mat 112 needs a separate transport work during construction and there is a problem that can be lost by the assistant even after laying on the filter mat (112). In addition, in order to prevent the support of the filter mat 112, when reinforcing the soil or sandstone that can withstand the water pressure acting on the filter mat 112, the slope must be smoothed for stability, so that the amount of construction is increased. This increases the cost of construction and increases the construction period.

Therefore, instead of laying soil or sandstone to fix the filter mat 112 installed on the embankment in the coastal tidal wave difference, it is possible to finish the construction faster than the conventional method by laying the gabion 120 fully prepared in advance. . In this case, the gabion 120 may be installed in various ways due to its flexible characteristics. For example, the gabion 120 may be closely attached between the gabions 120 that are installed as shown in FIG. 2C, along the inclined plane where the filter mat 112 is installed. The long direction of the gabion 120 is installed side by side on the sea floor, or the gabion 120 is in close contact with the inclined surface as shown in FIG. 2D along the inclined surface where the filter mat 112 is installed. The gabion 120 can be installed side by side on this inclined surface. Referring to FIG. 3, the gabion 120 for temporarily fixing the filter mat 112 at the filter rear portion will be described. The gabion 120 is made to fill the stone for filling into a mesh made of metal or fiber to act as a large rock. Since the gabion 120 is easy to manufacture and can be deformed in various ways, the gabion 120 can be laid in a deformed shape to suit the space. In addition, large rocks have no water gap, and thus receive a lot of water resistance, while the gabion 120 is attached to the bottom flat and can be pitched to receive less water. have.

The mesh forming the gabion 120 may be made of various materials according to the situation. For example, the gabion 120 made of metal may be manufactured in various shapes, and may be laid in the shape of the fabric, and the gabion made of fiber material 120 ) Is low in production cost and can be changed to a flexible shape according to the installation site. The gabion 120 may be filled with a filling stone of particles of a size that will not escape into the mesh, but the gabion with a larger grain than the filter stone 108 to receive less water pressure by algae coming from the sea at high tide. 120 It is desirable to fill the interior.

That is, the gabion 120 is installed on the filter mat 112 in order to prevent the filter mat 112 from being floated by the water pressure acting according to the water level difference between the inside and the outside of the coastal facility after installing the filter mat 112. Since the gabion 120 installed on the filter mat 112 is preferably manufactured to maintain the position well so that the water pressure acting according to the water level difference between the inside and the outside of the coastal facility is not well taken.

The larger the particle size of the filling stone constituting the gabion 120, the better the permeability of the gabions 120, the better the permeability of the gabions 120, the smaller the pressure will act on the gabions 120, the gabions 120 The larger the particle size of the filling stone can be more firmly fixed to the filter mat (112). On the other hand, if the diameter of the filling stone filled with gabions is too large, the filter mat may be damaged by the sharp surface. That is, since the gabion 120 fixes the filter mat 112 by its own weight on the filter mat 112, the portion contacting with the filter mat 112 becomes larger as the particle size of the filling stone constituting the gabion 120 increases. The filter mat 112 may be damaged because it is reduced and the load of the gabion 120 is concentrated to the portion.

In consideration of this point, the size of the particles of the filling stone constituting the gabion 120 is preferably in the form of a mixed stone of the range of 75mm to 200mm. When the filling stone of the gabion is smaller than 75mm, the voids are reduced, and the water pressure generated by the difference between tides only works a lot, and when the filling stone is larger than 200mm, the filter mat may be damaged. Also, if the grains are all uniformly sized (for example, all 75mm or all 200mm), the pores may become smaller or sharper and may damage the filter mat.

The west coast is one of the places where even the world's average is 8M and even the world's largest is shown, so the construction of the embankment on the west coast, especially the installation of the filter mat 112 on the top of the filter seat 108, It is advantageous in many ways to do it at low tide times. However, since the tidal waters are repeated twice a week, the time to start the actual work is not long. Therefore, it is desirable to use air tide time to reduce air and reduce construction costs.

Referring to Figure 4 will be described a method for shortening the time taken for the construction of the filter back portion using the gabion 120. Before the filter mat 112 is installed, the gabion 120 is made by preliminarily manufacturing a plurality of filling stones composed of particles larger than the filter stones 108 in a mesh made of metal or fiber, and the body 100 is prepared in advance. Prepare by placing on top. In the case of the gabion 120, the filling stone is easy to transport and load unlike the pile of sand because it is contained in the mesh made of metal or fiber.

When the seawater falls in accordance with the low tide time, the filter mat 112 is installed on the upper surface of the filter seat 108, and the filter mat 112 is fixed to the inclined surface of the body 100 without floating in the seawater. ) The gabion 120 prepared on the top of the body 100 is installed on the upper surface.

[Example of laying gabions]

Various methods may be used to install the gabion 120 on an inclined surface, for example, by using a barge to drop the gabion 120 on the surface to be placed. However, using a barge is not only expensive, but also requires time constraints since the water must be run at high tide when the water enters the dike. In addition, the gabion 120 dropped from the barge is not only difficult to accurately seat in the desired position by the bird, but also may be lost.

On the other hand, when laying the gabion 120 using the crane (1) can be operated at a relatively low cost than the barge operation and the operation is possible at low tide time, there is a significant cost and time advantage. In addition, the gabion 120 can be dropped precisely at the position where it is to be placed, and construction may be possible without additional manual work at the bottom of the slope of the filter mat.

Hereinafter, a method of laying the gabion 120 using the crane 1 will be described with reference to FIGS. 5 and 6. At this time, the crane 1 can be operated in various ways.

[First Embodiment]

In one embodiment, the crane 1 used to install the gabion 120 includes a first steel arm 5 fastened to the crane 1 and a second steel arm 7 connected to an end of the first steel arm 5. The second steel arm 7 is relatively rotatable with the first steel arm 5 and is rotatable about a longitudinal axis. In addition, one side of the second steel arm 7 is formed with a locking portion 18 to hang the gabion 120, the locking portion 18 is made of a variety of forms to maintain the second steel arm (7) horizontal The gabions 120 may be hung on the locking portion 18 so that the gabions 120 do not slip on the second steel arm 7 even when they are not. The shape of the locking portion 18 may be made of an embossed protrusion, for example, so that the mesh is caught in the protrusion, or is made of an intaglio groove so that the mesh is caught in the groove. In addition, when the second steel arm 7 is provided in the form of a rod having a circular cross section, it is advantageous to penetrate and remove the second steel arm 7 into the mesh of the gabion 120 and may be formed in various shapes according to circumstances. For example, the tip portion of the second steel arm 7 may be rounded convex.

Before the filter mat is installed, the crane 1 waits at the top of the body 100 in which the gabion 120 prepared in advance is disposed, and after the filter mat is laid, the gabion 120 is raised by the crane 1.

The process of walking up the gabion 120 by the crane (1) is as follows. When the locking portion 18 of the second steel arm 7 is positioned downward, the second steel arm 7 may be easily penetrated through the mesh of the gabion 120 to be inserted into the gabion 120. The second steel arm 7 is rotated so that the locking portion 18 formed on one side of the steel arm 7 faces downward and penetrated through the mesh of the gabion 120 to be inserted into the gabion 120. The second steel arm 7 inserted into the gabion 120 is rotated again about the longitudinal axis so that the locking part 18 faces upward, thereby holding the gabion 120 on the locking part 18. Lift the gabion 120 in the vertical direction. At this time, even if the tip portion of the second steel arm 7 is upward or downward, the gabion 120 is not caught by the locking portion 18 and thus does not slip away from the second steel arm 7.

 Lifting the gabions 120, the crane 1 carries the gabions 120 from the top of the body 100 to the vicinity of the place to drop the gabions 120.

In addition, the gabion 120 transported by the crane 1 is sequentially dropped from the bottom of the slope of the filter mat 112 installed along the inclined surface of the filter seat 108 in the state where the seawater is missing from the inside of the embankment.

The process of dropping the gabions 120 by the crane 1 carrying the gabions 120 is as follows. After moving the gabion 120 caught on the second steel arm 7 to the dropping point on the inclined surface on which the filter mat 112 is installed, and placing the tip obliquely to the downward side, the second steel arm 7 moves the longitudinal axis at the dropping point. It rotates to the center so that the locking portion 18 faces downward. When the locking portion 18 is directed downward, the gabion 120 flows down the second steel arm 7 smoothly by its own weight, and the gabion 120 is separated from the second steel arm 7 to be released. You land on.

When hanging the gabion 120 to the second steel arm (7), depending on the length of the second steel arm (7) can be lifted by walking several gabions (120) at a time, the fixed point and the gabion crane (1) The greater the distance between the dropping points of 120, the greater moment acts on the crane (1). When a moment that the crane 1 cannot handle is applied, the crane 1 may be overturned, so the distance between the point where the crane 1 is fixed and the dropping point of the gabion 120 and the second steel arm ( In consideration of the weight of the gabions 120 caught in 7), it is preferable to install the gabions 120 differentially. That is, several gabions 120 are differentially laid according to the distance between the point where the crane 1 is fixed and the point at which the gabions 120 are to be dropped, but the more gabions are installed in a position closer to the crane 1. It is desirable to install 120 at a time.

Second Embodiment

In one embodiment, the crane 1 used to install the gabion 120 includes a steel boom 40 fastened to the crane 1, the steel boom 40 is a shaft that is fastened to the crane (1) It is made of telescopic structure which is rotatable and stretchable in the longitudinal direction and can be rotated about the longitudinal axis. When the steel boom 40 rotates, only the outer member 46 constituting the outermost part of the steel boom 40 itself or constituting the steel boom 40 can rotate independently. Independently rotating only the outer member 46 has the advantage that it can be driven with less power than rotating the entire steel boom 40, but each member constituting the telescopic structure is provided in the form of a pipe with a circular cross section There is a limitation that can be applied only.

In addition, one side of the outer member 46 is formed with a protrusion 18 in the form of a protrusion to hang the gabion 120. The steel boom 40 is advantageous to penetrate or pull out the steel boom 40 into the mesh of the gabion 120 when each member constituting the telescopic structure is provided in the form of a pipe having a circular cross section. Only 46 may be rotated independently, but may be formed in various shapes according to circumstances.

Before the filter mat is installed, the crane 1 waits at the top of the body 100 in which the gabion 120 prepared in advance is disposed, and after installing the filter mat, the gabion 120 is raised by the crane 1.

The process of walking up the gabion 120 by the crane (1) is as follows. Steel boom 40 rotates the steel boom 40 (the outer member 46 when only the outer member 46 is configured to rotate so that the locking portion 18 formed on one side faces downward) and the steel boom 40 is rotated. Penetration into the mesh of the gabions 120 is inserted into the gabions 12. By rotating the steel boom 40 (the outer member 46 when only the outer member 46 is inserted into the gabion 120) is rotated about the longitudinal axis again so that the locking portion 18 faces upward. The gabion 120 is lifted in the vertical direction while the gabion 120 is caught by the locking portion 18.

Lifting the gabions 120, the crane 1 carries the gabions 120 from the top of the body 100 to the vicinity of the place to drop the gabions 120.

And the crane (1) carrying the gabion 120 in order from the bottom of the inclined surface with the filter mat 112 is installed along the installed inclined surface on which the filter seat 108 is installed in the state that the seawater is missing inside the levee dropping the gabion 120 Let's do it.

The process of dropping the gabions 120 by the crane 1 carrying the gabions 120 is as follows. The steel boom 40 extends side by side along the inclined surface on which the filter mat 112 is installed to fix the end of the steel boom 40 to the ground near the bottom of the inclined surface on which the filter mat 112 is installed. In such a state, when the steel boom 40 (the outer member 46 is configured to rotate only the outer member 46) is rotated about the longitudinal axis so that the locking portion 18 faces downward, the locking portion 18 is caught by the locking portion 18. The gabion 120 was flowed down by its own weight on the smooth upper surface of the steel boom 40 extended side by side along the inclined surface on which the filter mat 112 is installed, and is seated at the dropping point. Then, the steel boom 40 is shortened in the longitudinal direction to install the gabion 120 through the process of leaving the steel boom 40 in the mesh of the gabion 120.

Steel boom 40 is a telescopic structure that can be stretched in the longitudinal direction, the inner member constituting the interior of the steel boom is far from the crane (1), the steel boom 40 is extended along the inclined surface on which the filter mat 112 is installed While the gabion 120 is held on the surface formed with the engaging portion 18 of the outer member 46 is maintained in a stopped state. In addition, since the gabion 120 flows down by its own weight in the state where the inner member end is fixed to the ground near the bottom of the inclined surface on which the filter mat 112 is installed, the crane 1 Even if the distance between the fixed point and the dropping point of the gabion 120 becomes far, there is little fear that the crane 1 will overturn. Therefore, regardless of the dropping point of the gabions 120 can be laid several gabions 120 at a time.

Although the present invention has been described with reference to the drawings exemplified as above, the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, even if the above described embodiments of the present invention while not explicitly described and described the effect of the effect of the configuration of the present invention, it is obvious that the effect predictable by the configuration is also to be recognized.

1: crane
5: first steel arm
7: second steel arm
18: locking section
40: steel boom
46: outer member
100: body
104: coated stone
108: filter seat
112: filter mat
120: Gabion

Claims (7)

Stacking sandstones on the bottom surface on which the embankment is to be installed to form a body (100);
Laying a cover stone 104 to protect the slope along the slope facing the sea of the body 100;
Laying filter seats 108 for preventing the loss of landfill soil along slopes facing the landfill of the body 100;
Arranging a gabion (120) made by placing a plurality of filling stones composed of particles larger than the filter stones (108) in a mesh made of metal or fiber, and preparing them by placing them on top of the body (100);
The body 100 having the gantry 120 disposed with the crane 1 having a protrusion 18 or a recess 18 in the form of a protrusion or groove at the end of the arm 5, 7 or the boom 40. Developing by waiting on the cross section of the cloth;
Installing a filter mat (112) on an inclined surface on which the filter seats (108) are installed at low tide time; And
The filter mat 112 is prepared on the top of the body 100 on the inclined surface in which the filter mat 112 is installed within the low tide time so that the filter seat 108 can be settled on the inclined surface without buoyancy in seawater. And laying the gabion 120 into the crane 1;
The step of laying the gabion 120 in the crane (1) within the low tide time;
Hanging up the gabion 120 on the catching portion 18 of the crane 1 deployed on the body 100;
Extending the arms (5, 7) or booms (40) of the crane (1) by lifting the gabions (120) to carry the gabions (120) to the vicinity of the dropping place at the top of the body (100); And
At the dropping place, the catching part 18 of the crane 1 releases the gabion 120 to drop the gabion 120 at the dropping place.
Fixing the filter mat 112 by dropping the gabion 120 in order from the bottom along the inclined surface in which the filter mat 112 is installed within the low water time
Construction method of the filter back portion using a gabion characterized in that.
The method according to claim 1,
The crane 1 includes a first steel arm 5 installed on the crane 1, a second steel arm 7 connected to an end of the first steel arm 5, and the second steel arm 7. The arm 7 is rotatable relative to the first steel arm 5, the second steel arm 7 is rotatable about a longitudinal axis, and on one side of the second steel arm 7 The locking portion 18 is provided with a projection or groove to hang the gabion 120,
The step of walking up the gabion 120 with the crane (1),
Inserting the second steel arm (7) through the mesh or lifting rope of the gabion (120) into the gabion; And
Lifting the second steel arm 7 in the vertical direction while the second steel arm 7 is rotated so that the locking part 18 faces upward, and thus the locking part 18 of the gabion 120 Lifting the gabion 120 to catch the upper or lifting rope of the mesh; further comprising,
The crane 1 dropping the gabion 120 along the inclined surface on which the filter mat 112 is installed,
Moving the gabion (120) caught by the second steel arm (7) to a dropping point on an inclined surface on which the filter mat (112) is installed, and disposing the gabion at an angle so that the tip thereof is downward; And
By rotating the second steel arm 7 about the longitudinal axis at the point of release, the locking portion 18 faces downward, so that the gabion 120 has a smooth upper surface of the second steel arm 7. Leaving the gabion (120) from the second steel arm (7) by flowing down by its own weight to ride the filter rear portion construction method using a gabion, characterized in that it further comprises.
The method according to claim 2,
The step of laying the prepared gabion 120 on the top of the body 100:
The crane 1 is fixed in consideration of the overturning of the crane 1 when the gabion 120 caught on the second steel arm 7 is sequentially installed from the lower end along the inclined surface on which the filter mat 112 is installed. According to the distance between the point and the point to drop the gabions 120, the several gabions 120 are differentially installed, the more gabions 120 at a time closer to the position of the crane (1) Construction method of the filter back portion using a gabion characterized in that the installation.
The method according to claim 2 or 3,
The second steel arm 7 is:
It is provided in the form of a rod whose cross section is circular;
Part of the outer surface of the filter back portion construction method using a gabion, characterized in that it comprises a locking portion (18) provided in the form of an embossed projection or intaglio groove that can hang the gabion 120 along the longitudinal direction.
The method according to claim 1,
The crane (1) includes a steel boom (40) having a telescopic structure that is rotatable about an axis fastened to the crane (1) and rotatable about a longitudinal axis, and has a telescopic structure that is stretchable in the longitudinal direction. In addition, the outer member 46 of the steel boom 40 includes the locking portion 18 of the projection form to hang on one side,
The step of lifting the gabion 120 by the crane 1,
Inserting the steel boom 40 into the gabions 120 by penetrating the mesh of the gabions 120; And
The steel boom 40 penetrated by the gabions 120 is rotated about a longitudinal axis so that the locking portion 18 faces upwards, and the steel boom 40 is lifted in the vertical direction to hold the locking portion ( And lifting up the gabion 120 at 18).
The crane 1 dropping the gabion 120 along the inclined surface on which the filter mat 112 is installed,
Extending the steel boom 40 side by side along the inclined surface on which the filter mat 112 is installed to fix an end of the steel boom 40 to the ground near the bottom of the inclined surface on which the filter mat 112 is installed;
Rotating the steel boom 40 about a longitudinal axis so that the locking portion 18 is directed downward, so that the gabion 120 is extended side by side along the inclined surface on which the filter mat 112 is installed. Riding on the smooth upper surface of the) so that it flows down by its own weight and is settled at the dropping point; And
Shortening the steel boom 40 in the longitudinal direction to separate the gabion 120 from the steel boom 40; Filter back portion construction method using a gabion, comprising a.
The method according to claim 5,
The steel boom 40 is:
A method for constructing a filter back using a gabion, wherein each member constituting the telescopic structure is provided in the form of a pipe having a circular cross section.
The method according to claim 6,
The steel boom 40,
Only the outer member 46 of the steel boom 40 independently rotates about its longitudinal axis, so that the direction in which the engaging portion 18 provided on one side of the outer member 46 is directed can be changed. Construction method of the filter back using a gabion.

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