KR20020068936A - Coupling Structure of Vertical Steel Bar for Reinforced Earth Retaining-Wall Frame - Google Patents

Abstract

PURPOSE: A vertical flat bar joint structure of a reinforced earth retaining wall using a steel lattice front frame is provided to secure structural stability and to compose vegetative environment. CONSTITUTION: The vertical flat bar joint structure of a reinforced earth retaining wall using a steel lattice front frame comprises a front frame(10) formed by latticing many vertical flat bars(11) and horizontal bar steels(12), a vegetation mat attached to the back of the front frame(10), and a chain stiffener(30) connected to each appointed height of the vertical flat bars(11) and buried horizontally under a banking part, and protects a retaining wall from frictional resistance from banking materials and the chain stiffener(30) and guides the vegetation on the front of a retaining wall.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced earth retaining wall,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall structure for preventing collapse or leakage of gravel by naturally forming or protecting slopes according to composition of road, railroad, river bank, etc., A reinforcing earth retaining wall for finishing and providing a galvanized steel reinforcing material to the clay part of the front frame to secure structural stability and to provide a growing environment of the plant, wherein a vertical flat material of the front frame connected to the upper and lower sides is displaced To a vertical flat re-joining structure of a reinforced earth retaining wall using a steel lattice frame.

In Korea, the importance of soil stabilization and slope protection is of paramount importance in constructing retaining walls of slopes of roads and railways, slope slopes of park areas, river banks, and coastal roads, so that the entire front is made of reinforced concrete structures or concrete blocks Or a retaining wall closed with a concrete panel.

These reinforced concrete retaining walls are required to take measures to prevent the lateral earth pressure of the embankment from falling and to prevent conduction. Therefore, in most cases, a reinforced soil method is used in which a reinforcing member is embedded in the backfill.

BACKGROUND ART [0002] As a representative example of a reinforced earth retaining wall in which a reinforcing member is embedded in a clayeye as described above, a block type reinforcing earth retaining wall as shown in Fig. 1 is known.

This reinforced earth retaining wall is constructed as a front surface of a structure in which the concrete block members 1 are stacked on the foundation concrete in stages.

On the back side of the block members 1, strip-shaped steel plate stiffeners 2 are fixed at regular intervals and these steel plate stiffeners 2 are horizontally extended toward the fillet 3 side.

Since the steel sheet reinforcement 2 embedded in the embankment 3 retains its position due to the earth pressure of the embankment, the retaining wall constructed of the block materials 1 is pulled toward the embankment side so that the conduction of the retaining wall due to the lateral earth pressure .

However, since the conventional reinforced earth retaining wall constructed using the concrete block as described above is difficult to transport due to the heavy weight of the block materials, it is difficult to install in the field, and the cost of purchasing the material is high, There is a problem.

In addition, the concrete block itself has no drainage function and the backfill construction is carried out with gravel and the like. However, there is a great difficulty in securing the structural stability because the drainage is not smooth and there is a risk of collapse by water pressure.

In addition, the retaining wall structure by concrete block provides a gray appearance that is not in harmony with the natural surroundings around the site, greatly damaging the cityscape, and is heterogeneous with the natural ecosystem of the original roadsides and rivers, It is becoming a factor to deteriorate natural ecological environment such as small animals.

In addition, since the steel plate stiffener used for reinforcing the clay soils can not be folded as described above, it is difficult to carry them, and in order to obtain a required frictional force, a stiffener having a length of 10 m or more is required. In this case, It is difficult to obtain a satisfactory frictional force between the embankment and the steel plate reinforcement, thereby failing to secure the structural stability of the retaining wall.

Therefore, in order to solve all the problems of the concrete block-type reinforced earth retaining wall as described above, Japanese Unexamined Patent Application Publication No. 9-328761 discloses a construction in which the whole face of a retaining wall is constructed of a steel lattice front frame, And the like.

As shown in Figs. 2A to 2C, the retaining wall structure according to this prior art includes a plurality of vertical flat steel members 4a vertically connected to each other, and a plurality of horizontal steel members 4b horizontally connected to each other, A vegetation mat 5 attached to the back surface side of the front frame 4 and connected to the vertical flat materials 4a at a predetermined height in the front frame 4 to form a back side clad 6 Like chain stiffener (7) which is horizontally extended in the longitudinal direction of the vehicle.

The prior art thus constructed guides the vegetation of the entire retaining wall through the grid-shaped steel lattice front frame 4 and the vegetation mat 5, and supports the entire retaining wall by the frictional resistance of the embankment and the chain reinforcement 7.

Therefore, according to the prior art constructed as described above, since the constituent material of the steel lattice front frame and the vegetation mat forming the front of the retaining wall is significantly lighter than the concrete block, it is easy to carry and efficient work can be performed in the field.

Particularly, there is an advantage of providing an environmentally friendly civil engineering structure in which greening is achieved by providing a foundation for plant settlement and growth on the whole of a retaining wall.

In addition, since the whole of the retaining wall is stretched and supported on the side of the embankment while the frictional resistance is maintained by the chain stiffener having a severe bending, it is possible to stably construct a retaining wall having a large area.

However, as a result of introducing the above-described prior art into the field, the present applicant has found that some points are insufficient.

One of the deficiencies is that the above-mentioned prior art is provided with a front frame of one lower layer divided into several stages according to the design height of the retaining wall, connecting the chain stiffener to the vertical flat member of the front frame, , The upper surface of the upper frame is connected to the upper end of the vertical flat material of the lower frame, and then the upper surface of the upper flat frame is connected to the lower surface of the upper frame. Then, There is a problem that displacement occurs at the upper and lower portions of the ashes.

That is, in the prior art described above, as shown in Figs. 2B and 2C, two through-holes 4c, each having the same interval and slightly larger than the bolt, are formed at the upper and lower portions of the vertical flat members 4a, The upper and lower vertical flat steel members 4a are stacked to align the through holes 4c and then the bolts 8 are passed through the through holes 4c.

2 (d), the chain stiffener 7 is also folded together with the embankment along with the collapse of the embankment by the self-weight as shown in Fig. 2 (e) At this time, the joint portions of the vertical flat steel members are displaced by the force that the chain reinforcement 7 pulls the joint portions of the vertical flat members 4a backward, thereby increasing the flatness of the front face of the retaining wall, However, there is a problem that the stability of the retaining wall structure is greatly reduced.

Therefore, the prior art disclosed in the above-mentioned Japanese Patent Application Laid-Open No. H9-328761 is considered to be able to achieve the object completely by solving the above problems.

Therefore, it is an object of the present invention to provide a method of manufacturing a reinforced earth retaining wall, which is constructed by a steel lattice front frame so as to enable recording, by mechanically and rigidly joining a joint portion of a vertical flat member vertically connected thereto to displace the joint portion of the vertical flat member The present invention is to provide a vertical flat joining structure of a reinforced earth retaining wall using a steel lattice front frame for maintaining the flatness of the front face of the retaining wall evenly and ensuring the stability of the retaining wall structure.

In order to accomplish the above object, the present invention provides a method of connecting vertical steel strips of a steel lattice front frame for vertically connecting a front end of a retaining wall, the side strips being connected to each other using a connection clip, The inner side surface of the vertical flat joint member is tightly fixed to the outer side surface of the vertical flat steel member to prevent displacement of the vertical flat joint member.

1 is a cross-sectional view of one side of a reinforced earth retaining wall using a conventional concrete block and a steel plate reinforcement

FIGS. 2A to 2E are views of reinforced earth retaining walls using a steel grid front frame and a chain reinforcement according to the prior art

3 is a cross-sectional view of one side of the reinforced earth retaining wall according to the present invention

Fig. 4 is a vertical sectional view commonly showing first, second and third embodiments according to the vertical stiffener coupling structure of the present invention. Fig.

5A and 5B are a perspective view and a plan view showing a first embodiment of the present invention

6A and 6B are a perspective view and a plan view showing a second embodiment of the present invention

7A and 7B are a perspective view and a plan view showing a third embodiment of the present invention

8 is a longitudinal sectional view commonly showing fourth and fifth embodiments according to the vertical stiffener coupling structure of the present invention.

9A and 9B are a perspective view and a plan view showing a fourth embodiment of the present invention

10A and 10B are a perspective view and a plan view showing a fifth embodiment of the present invention

Description of the Related Art

10: front frame 11: vertical flat material 11a: bolt hole

12: horizontal bar steel 20: vegetation mat 21: iron mesh

30: chain stiffener 31: engaging member 40: connecting clip

40a: bolt hole 41: first connecting piece 42: second connecting piece

43: flange 51: bolt 52: nut

A:

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

FIGS. 3 to 10B illustrate a joint structure of a vertical flat steel according to embodiments of the present invention, wherein the same reference numerals are used to denote the same elements in the drawings of the respective embodiments.

The present invention according to these embodiments comprises a front frame 10 in which a plurality of vertical flat members 11 connected in a vertical direction and a plurality of horizontal bar members 12 connected in a lateral direction are assembled in a lattice form, A vegetation mat 20 attached to the back surface side of the frame 10 and a plurality of vertical flat members 11 connected to each other at a predetermined height of the vertical flat members 11 so as to be embedded in the back side clad part A horizontally, Shaped chain stiffener 30 to retain the retaining wall by the frictional resistance between the embankment and the chain stiffener 30 and to induce the vegetation on the whole retaining wall through the vegetation mat 20. In this regard, In conjunction with known prior art and technical concepts.

However, in the present invention, the connecting clip 40, which is manufactured in a state in which the side portions are divided, is placed on the outer side of the upper and lower ends of the upper and lower vertical flat members 11, And the upper and lower vertical flat steel members 11 are fastened with the bolts 51 and the nuts 52 and connected to each other.

The present invention having such a technical feature of the present invention is characterized in that a chain stiffener 30, in which a lateral earth pressure acts on a joint portion of upper and lower vertical flat steel members 11 and is pushed forward or downward together with the settlement of the embankment, The inner side surface of the connection clip 40 is tightly fixed to the outer surface of the upper and lower vertical flat steel members 11 to prevent deformation of the joint portions.

Embodiments of the present invention having the above-described features will be described in detail.

Figs. 4 to 7B show the first to third embodiments according to the present invention.

These embodiments illustrate the joining structure of the vertical flat steel members connecting the upper and lower circumferential surfaces of the vertical flat steel members 11 connected to each other in the vertical direction.

That is, in these embodiments, as shown in Fig. 4, the upper and lower circumferential surfaces of the vertically flattened members 11 vertically connected to each other are opposed to each other, and the upper and lower vertical flattened members 11, The upper and lower vertical flat steel members 11 and the connection clip 40 are separated from each other by a distance of 1/2 from the upper and lower ends of the upper and lower vertical flat steel members 11, The upper portion of the lower vertical flat steel member 11 and the upper portion of the connecting clip 40 are bolted to each other to bolt-fasten the upper portion of the vertical flat steel member 40. FIG.

Bolt holes 11a and 11b are previously formed in the vertical flat steel material 11 and the connecting clip 40 where bolts 51 pass through.

Here, the connection clip 40 according to the first embodiment of the present invention includes channel-shaped first and second connection pieces 41 and 42 having flanges 43 on both sides as shown in FIGS. 5A and 5B And has a split-formed structure.

The connecting clip 40 according to the second embodiment of the present invention has a channel-shaped first connecting piece 41 having both flanges 43 as shown in FIGS. 6A and 6B, And has a structure in which the connecting piece 42 is divided and manufactured.

The connecting clip 40 according to the third embodiment of the present invention includes first and second connecting pieces 41 and 42 having angled first and second flanges 43 as shown in FIGS. And has a split-fabricated structure.

8 to 10B illustrate a fourth embodiment and a fifth embodiment according to the present invention.

These embodiments illustrate a joint structure of a vertical flattened material which overlaps the upper and lower portions of the vertical flattened materials 11 that are vertically connected to each other by connecting a certain portion thereof.

That is, in these embodiments, as shown in FIG. 8, the upper and lower portions of the vertically flattened members 11 vertically connected to each other are partially overlapped with each other, and the overlapping portions are bolted together by vertically connecting at least two portions. The connecting clip 40, which is formed by dividing the side portion so as to have a shape that closely surrounds the four sides of the overlapping portion, is placed on the outer side of the overlapping portion of the upper and lower vertical flat members 11, 40 and the upper and lower vertical flat steel members 11 are bolted together to form a joint structure of the vertical flat steel members.

Bolt holes 11a and 11b are previously formed in the vertical flat steel material 11 and the connecting clip 40 where bolts 51 pass through.

9A and 9B, the connection clip 40 according to the fourth embodiment of the present invention has a channel-like first connection piece (not shown) having flanges 43 of both sides in the same manner as the second embodiment of the present invention 41 and a second connecting piece 42 formed in a flat plate shape.

10A and 10B, the connecting clip according to the fifth embodiment of the present invention includes first and second connecting pieces 41 (see FIG. 10A and FIG. 10B) having angled first and second flanges 43 42).

Meanwhile, in carrying out the reinforced earth retaining wall using the steel lattice front frame according to the present invention, the steel lattice frame 10 is a structural part provided on the front surface of the reinforcing earth so as to bind the chain reinforcement and prevent the soil from collapsing , The vertical flat steel member 11 and the horizontal bar steel member 12, which are the assembling members, are made of galvanized metal.

The vegetation mat 20 is installed to lead the vegetation to a leading place and includes a geogrid. After completing the assembly of the front frame 10, the vegetation mat 20 is placed on the back surface of the front frame 10, (21) is attached to the back surface of the iron net (21).

The chain stiffeners 30 are connected to the front frame 10 and arranged at appropriate intervals in the backfill soil to resist the earth pressure by the tensile strength of the chain stiffener and the friction between the soil and the ground, and a zinc-plated chain is used.

At this time, the chain stiffener 30 is arranged on the outer side of the connecting clip 40 to fasten the chain stiffener 30 to the front frame 10 and fastened to the lower end of the bolt fastening structure of the connecting clip 40 So that the bolts 51 are fastened together.

The present invention as described above has the following effects.

It is possible to provide an environmentally friendly structure that is possible to vegetation, and as a reinforcing body made of a front grating frame and a chain reinforcing material, it is resistant to a differential settlement.

Zinc plating chain stiffeners with high flexibility and durability are used, so that they have high tensile strength and high frictional resistance with soil, and are resistant to creep deformation due to continuous load and can cope with them permanently.

As the retaining wall height increases, the lateral restraint stress increases, which is structurally safe.

Since the factory manufactured iron products are used, the construction is simple and easy, and the air is greatly reduced because the same operation is performed from the bottom to the top while assembling the bolt with the minimum attraction regardless of the change of the climate or the environment.

Since the front of the structure is composed of a mesh network with a filter function, natural drainage by the open front is made, so there is no damage to groundwater.

Particularly, according to the present invention, since the upper and lower vertical flat members are firmly fixed by using the connecting clip, the displacement of the joint portion of the vertical flat member is prevented by the rear earth pressure, and the flatness of the front face of the retaining wall is uniformly maintained and the stability of the retaining wall structure is ensured It is a very useful invention that keeps the life of the retaining wall for a long time.

Claims (6)

A front frame 10 in which a plurality of vertical flat steel members 11 connected vertically and a plurality of horizontal bar steel members 12 connected in a lateral direction are assembled and installed in a lattice form, A chain stiffener 30 connected to each of the vertical flat members 11 at a predetermined height in the front frame 10 so as to be horizontally extended in the back side clad A, A retaining wall structure for retaining a retaining wall by frictional resistance of the embankment and the chain stiffener 30 and inducing vegetation on the whole of the retaining wall through the vegetation mat 20, The connection clip 40 manufactured in a state in which the side portions are divided is placed on the outer side of the upper and lower ends of the upper and lower vertical flat members 11 and the upper and lower vertical flat members 11 are bolted together with the connection clip 40 A connecting portion of the connecting clip 40 is connected to the upper portion of the vertical flattening members 11 by a lateral earth pressure so as to push the connecting piece 40 forward, Vertical flat joining structure of reinforced earth retaining wall using steel frame lattice frame to prevent displacement of joining part by tightly fixing outer side of upper and lower vertical flat steel material (11). The vertical flat joining structure as claimed in claim 1, wherein the vertically flat joining structure comprises: a pair of upper and lower circumferential flat members (11) The connection clip 40 is divided into upper and lower ends of the upper and lower vertical flat steel members 11 so that the connecting clip 40 is divided into upper and lower ends of the upper and lower vertical flat steel members 11, 40) are bolted to each other, and the upper portion of the lower vertical flat steel material (11) is connected to the upper portion of the connecting clip (40) by bolts. The vertical flattening of the reinforcing earth retaining wall Rejoining structure. 3. The method of claim 2, wherein the connection clip (40) is divided into channel-shaped first and second connecting pieces (41) and (42) having flanges (43) Vertical flat joining structure of retaining wall. The vertical flat joint structure as claimed in claim 1, wherein the vertical flat joint structure is formed by vertically overlapping upper and lower portions of vertical flat steel members (11) vertically connected to each other and connecting the overlapped portions by vertically connecting at least two portions, The connecting clip 40, which is formed by dividing the side portion so as to have a shape that closely surrounds the four sides of the overlapping portion, is placed on the outer side of the overlapping portion of the upper and lower vertical flat members 11, 40) and the upper and lower vertical flat steel members (11) are bolted to each other by bolts. The vertical flat steel joining structure of the reinforcing earth retaining wall using the steel frame lattice frame. The connector according to claim 2 or 4, wherein the connection clip (40) is divided into a channel-shaped first connection piece (41) having both flanges (43) and a second connection piece (42) A Vertical Steel Reinforcing Structure of Reinforced Earth Retaining Wall Using a Steel Lattice Frame. The connecting member according to claim 2 or 4, wherein the connecting clip (40) is divided and manufactured by first and second connecting pieces (41, 42) having an angled shape having one side flange (43) Vertical Reinforcing Structure of Reinforced Earth Retaining Wall Using Front Frame.