KR20090069749A - In suit fabricated leaning retaining wall and construction method of the same - Google Patents

Abstract

A field prefabricated retaining wall and a construction method thereof are able to adjust the angle of the retaining wall according to the collapsed shape of the stone spot cut-slope. A field prefabricated retaining wall comprises a pressing part(210) which is rectangular-board shaped, an upper coupling part(230) which protrudes from the top of the pressing part, wherein the top base aperture(231) is formed in the horizontal direction, a wallboard segment(200) comprising a lower coupling unit(220) wherein a lower coupling hoie(221) is formed in the horizontal direction, a wallboard wherein the wallboard segments are horizontally and vertically placed in the cut-slope, a coupling rod(300) including a steel rod which is coupled with the upper and lower coupling holes, and a concrete filler which is formed in the rear surface of the wallboard.

Description

Field-mounted willing retaining wall and construction method {IN SUIT FABRICATED LEANING RETAINING WALL AND CONSTRUCTION METHOD OF THE SAME}

The present invention relates to a field-assembled retaining retaining wall and its construction method. More specifically, in case of collapse on the cut slope consisting of rock, part of the wall of the retaining retaining wall is prefabricated, and concrete is directly attached to the collapsed cut slope to prevent additional collapse, loose rock mass, and lower rock dropout. The present invention relates to a field-assembled retaining retaining wall and a construction method thereof so that measures for securing can be taken promptly.

In Korea, more than 70% of the country's land is mountainous, so cut slopes due to road construction are inevitable.

In addition, as the existing roads continue to expand and linearly improve, cut slopes are gradually increasing.

When new cut slopes are formed due to the establishment and extension of roads, appropriate slope stabilization methods are performed in consideration of the characteristics of cut slopes.However, in the case of existing roads opened before the 1990s, cut slopes exist due to economic and technical problems. Design and construction have been carried out with the unstable elements left untouched, causing falling rocks and slope collapse frequently due to concentrated rainfall, thawing and freezing and thawing.

Particularly, in case of cut slopes composed of rock, the collapse of rock slopes is mainly caused by the existence of discontinuities in the rocks and relaxation of rocks due to blasting construction. It tends to lose strength and support, causing further collapse.

In order to increase the supporting force of the rock fracture slope and its surroundings, reinforcement methods for attaching concrete to the cut slope are generally applied. Examples of the method include buttresses, voluntary retaining walls, and stepped retaining walls.

Buttress is a method to secure the supporting capacity by filling the space for loss of support due to the collapse of the lower slope slope with concrete, and the retaining wall forms the retaining wall so as to fill the space for loss of support for the slope slope and lean on the cut slope. It is a method to secure the supporting force by the weight of the retaining wall and to protect the cut slope surface, and the stepped retaining wall fills the space where the loss of support force of the cut slope is filled with concrete and forms the retaining wall stepped on the cut slope to provide greater bearing capacity. This method ensures and protects the cut surface.

However, Buttress can be applied to a small specific section, and the stepped retaining wall can be applied only when there is a sufficient distance between the cut slope and the road, and its use is limited.

Figures 1a to 1d shows the process of reinforcing the collapsed cut slope using the retaining retaining wall.

When the cut slope 10 collapses as shown in FIG. 1A, the foundation 20 is first constructed on the front lower ground of the cut slope 10 to construct a retaining retaining wall for reinforcing the cut slope 10.

At this time, after assembling the wall reinforcement 31 in advance, as shown in Figure 1b to form a foundation 20 by pouring concrete.

Next, the wall formwork 32 is assembled to the front wall reinforcement 31 assembled as shown in FIG. 1C, and the wall concrete 33 is poured and cured to form the wall 30 as shown in FIG. Done.

The buttresses and stepped retaining walls are constructed in a similar manner. Thus, the conventional rock cut slope reinforcement method for attaching concrete to collapsed cut slopes is carried out at the site of collapsed cut slopes. It should be constructed step by step in the form of dismantling the form, and the curing period is required until the concrete reaches a certain strength, there was a problem that the construction period takes a lot.

In addition, since most cut slopes do not have sufficient distance from the road, they control roads in at least one lane during the construction period, resulting in long-term inconvenience in the normal use of the road.

The present invention is to solve the above problems,

An object of the present invention is to ensure the support of the rock cut slope by allowing the construction of the retaining wall using a pre-fabricated concrete plate when the reinforced method for attaching concrete to the cut slope is required for the collapsed rock cut slope It is to provide a field-assembled knowledgeable retaining wall and its construction method that can be installed quickly without preventing further collapse.

It is another object of the present invention to provide a field-assembled retaining retaining wall and a construction method thereof that can be easily deformed and constructed according to the collapsed shape of the rock slope.

The present invention to achieve the above technical problem,

First, by assembling a plurality of precast wallboard segments formed with protruding fastening parts to be hinged to each other on the upper and lower surfaces, a wall plate can be formed to form a part of the wall of the retaining retaining wall instead of a formwork. .

Second, a fastening hole is formed in a horizontal direction and a fastening hole is formed in a horizontal direction and a fastening rod including a steel rod is inserted in the fastening portion protruding from the upper and lower surfaces of the wall plate segment so as to hinge the wall plate segment. It was formed to be able to adjust the inclination of the wall plate formed by assembling the wall plate segment.

Third, ground reinforcement materials including rock bolts or rock anchors were installed and connected to the wallboard segments to ensure greater bearing capacity.

By the field-assembled knowledge retaining wall of the present invention, it is possible to quickly reinforce the collapsed rock slope, and to minimize the inconvenience of road traffic due to the collapse of the rock slope.

According to the collapsed shape of rock slopes, the inclination of the retaining wall is freely controlled.

Precast products can be used to provide excellent aesthetics, and the process can be simplified to reduce construction costs.

The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

Figure 2a shows a wallboard segment of the invention.

The wall plate segment 200 of the present invention constitutes a part of the wall of the retaining retaining wall, and is generally made of a plate-shaped concrete block, and the reinforcing bar is usually reinforced in order to improve strength.

The wall plate segment 200 may be divided into the acupressure part 210, the upper fastening part 230 and the lower fastening part 220 formed on the upper and lower surfaces of the acupressure part 210, and the acupressure part 210. ) Is a rectangular plate shape, has a predetermined thickness, and the anchor portion 211 penetrating the acupressure part 210 is formed at the center thereof, so that additional reinforcement such as rock bolt or rock anchor is required. It will serve as a settlement hall.

The upper fastening portion 230 is formed to protrude on the upper surface of the shiatsu portion 210, the lower fastening portion 220 is a kind of rectangular parallelepiped formed to protrude to the lower surface of the shiatsu portion 210, perpendicular to the horizontal direction It will have a cross-section symmetrical to each other, is formed to correspond to each other to be assembled.

That is, the upper fastening portion 230 and the upper fastening portion 230 of one wall plate segment 200 and the lower fastening portion 220 of the other wall plate segment 200 are connected to each other and hinged so that the upper plate 230 and the wall plate can be assembled. The lower fastening part 220 is formed.

In the present invention, the lower fastening portion 220 is formed in the center of the lower surface of the shiatsu portion 210, and the upper fastening portion 230 is based on the wall plate segment 200 formed on both sides of the upper surface of the shiatsu portion 210. It will be described, of course, there is no limitation on the shape of the wall plate segment 200 if the wall plate segments 200 can be hinged to each other.

The lower fastening part 220 has a hollow female lower fastening hole 221 penetrating the lower fastening part 220 in a horizontal direction, and the upper fastening part 230 also in the horizontal fastening part 230. Through, but the upper fastening hole 231 is a hollow portion having the same diameter as the lower fastening hole 221 is formed.

A method of assembling such wallboard segments 200 is shown in FIG. 3.

That is, another wall plate segment 200 is disposed in contact with an upper surface of the wall plate segment 200.

At this time, the lower fastening portion 220 of the wall plate segment 200 disposed on the upper portion is inserted between the upper fastening portions 230 of the wall plate segment 200 disposed on the lower portion, and formed on the upper fastening portion 230. The fastening bar 300 passes through the upper fastening hole 231 and the lower fastening hole 221 in a state in which the lower fastening holes 221 formed in the upper fastening hole 231 and the lower fastening part 220 communicate with each other. By inserting and hinged wallboard segments 200, they are firmly assembled to each other.

The wall plate segments 200 assembled as described above have upper and lower surfaces in close contact with each other, so that the rotation of the wall plate segment 200 around the fastening rod 300 is constrained at the connection site, thereby assembling the wall plate. It will be able to maintain a solid.

The fastening rod 300 may be a kind of steel rod having the same diameter as the upper fastening hole 231 and the lower fastening hole 221 as a rod-shaped steel, and various lengths depending on the horizontal installation length of the retaining retaining wall. To have.

That is, the wall plate segment 200 is placed side by side in the horizontal direction of the retaining retaining wall, and the wall plate segment 200 is placed in contact with the upper part of the wall in accordance with the horizontal installation length of the retaining wall. According to insert the fastening rod 300 of the appropriate length, it becomes possible to install the retaining retaining wall to the required length.

2B and 2C show another embodiment of the wallboard of the invention.

This is a wall plate segment 200 for controlling the inclination of the retaining wall, which constitutes a part of the wall of the retaining wall, and is generally made of a plate-shaped concrete block. It will be arranged to be precast.

The wall plate segment 200 is in the form of a rectangular plate, has a predetermined thickness, the central portion 210 is formed with an anchor hole 211, the upper portion protruded on the upper surface of the acupressure portion 210 The fastening part 230 and the lower fastening part 220 protruding from the lower surface of the acupressure part 210, the upper fastening part 230 of one wall plate segment 200 of the other wall plate segment 200 Lower fastening portion 220 is fitted to each other is hinged,

As shown in FIG. 2B, the upper fastening part 230 is a rectangular parallelepiped block whose upper edge is rounded to a curved surface, and an upper fastening hole 231 is formed as a hollow part penetrating the upper fastening part 230 in a horizontal direction. The upper fastening hole 231 has a regular polygonal cross section, and the lower fastening part 220 is also a lower fastening part which is a hollow part penetrating the lower fastening part 220 in a horizontal direction as a rectangular parallelepiped block having a lower edge of the rear surface rounded to a curved surface. 221 is formed, the lower fastening hole 221 has the same polygonal cross section as the upper fastening hole 231.

Also, as shown in FIG. 2C, the upper fastening part 230 is a rectangular parallelepiped block whose upper edge is rounded to a plurality of bent surfaces, and the upper fastening hole 231 is a hollow part penetrating the upper fastening part 230 in the horizontal direction. Is formed, the upper fastening hole 231 has a regular polygonal cross-section, the lower fastening portion 220 also the lower fastening portion 220 in the horizontal direction as a rectangular parallelepiped block is rounded to a plurality of bent surfaces of the lower bottom side A lower fastening hole 221 is formed through the hollow portion through which the lower fastening hole 221 has the same regular polygonal cross section as the upper fastening hole 231.

Here, the upper fastening hole 231 and the lower fastening hole 221 may be formed to have a variety of regular polygonal cross section, such as a regular 10 octagonal or a regular 12 angular, but the reason that is formed to have a regular polygonal cross-section wall plate is assembled in contact with up and down As the inclination of the segment 200 is different from each other, a wall plate is formed by adjusting the inclination of the wall plate 200 segment so that the regular polygonal cross section of the upper fastening hole 231 and the regular polygonal cross section of the lower fastening hole 221 coincide with each other. To help.

A method of assembling the wall plate segment 200 having the upper fastening hole 231 and the lower fastening hole 221 having a regular polygonal cross section with each other is shown in FIG. 4, which is a wall plate segment 200 shown in FIG. 2C. As used, the wallboard segment 200 shown in FIG. 2B may also be assembled in the same manner.

That is, another wall plate segment 200 is disposed in contact with an upper surface of the wall plate segment 200.

At this time, the lower fastening portion 220 of the wall plate segment 200 disposed on the upper portion is inserted between the upper fastening portions 230 of the wall plate segment 200 disposed on the lower portion, and formed on the upper fastening portion 230. The lower fastening hole 221 formed in the upper fastening hole 231 and the lower fastening part 220 is in communication with each other, and when it is desired to adjust the inclination of the wall plate segment 200 disposed on the upper wall segment 200 ) To be further inclined in the rear direction, and the inclination of the wall plate segment 200 may be adjusted so that the regular polygonal cross section of the upper fastening hole 231 and the regular polygonal cross section of the lower fastening hole 221 correspond to each other.

As described above, the fastening rod 300 is inserted into the fastening rod 300 through the upper fastening hole 231 and the lower fastening hole 221 in the assembled state by changing the inclination of the wall plate segment 200, and then the wall plate is firmly assembled. Done.

Here, the fastening rod 300 is a rod-shaped steel material having a regular polygonal cross section identical to the regular polygonal cross section of the upper fastening hole 231 and the lower fastening hole 221, and the wall plate segments 200 assembled as described above Rotation of the wall plate segment 200 around the fastening rod 300 of the regular polygonal cross section is constrained to maintain a solid assembly state of the wall plate.

In addition, the wall plate segment 200 is placed side by side in the horizontal direction of the retaining retaining wall, and arranged while adjusting the inclination of the wall plate segment 200 to the required height above it, and then the horizontal installation length of the retaining retaining wall By inserting the fastening rod 300 of the appropriate length according to, it becomes possible to install the knowledge retaining wall to the required length.

The method of constructing the retaining retaining wall using the wall plate segments 200 which can be hinged to each other is illustrated in FIGS. 5A to 5D.

First, when the cut slope 100 collapses as shown in FIG. 5A, first, in order to construct a retaining retaining wall for reinforcing the cut slope 100, first, the base 400 is constructed to have the same height in the horizontal direction on the lower ground of the cut slope 100. Done.

At this time, the upper surface of the foundation 400 protrudes to form a foundation fastening portion (not shown) having the same shape as the upper fastening portion 230 of the wall plate segment 200 so that the wall plate segment 200 can be hinged later. In addition, for faster construction, the wall plate segment 200 may be installed to expose the upper fastening portion 230 of the wall plate segment 200, and the foundation 400 may be formed by pouring concrete.

Next, assembling the wall plate segment 200 on top of the base 400 as shown in Figure 5b and continue to install the wall plate segment 200 to the required height by one step.

Here, the upper fastening portion 230 of the wall plate segment 200 and the lower fastening portion 220 of the other wall plate segment 200 disposed thereon are fitted to each other so that the upper fastening portion 230 of the wall plate segment 200 is interposed therebetween. The lower fastening hole formed in the upper fastening hole and the lower fastening portion 220 formed in the state in such a manner that the fastening rod 300 is inserted into the upper fastening hole and the lower fastening hole through the hinge to connect the wall plate segment step by step ( 200) is assembled to form a wall plate.

At this time, the upper fastening portion 230 and the lower fastening portion 220, respectively, the upper fastening hole and the lower fastening hole having a regular polygonal cross-section is formed, the upper side of the upper fastening portion 230 and the back of the lower fastening portion 220 In case of using the wall plate segment 200 whose lower edge is rounded to the curved surface, the wall plate segment 200 is assembled by changing the inclination of the wall plate segment 200 as necessary, and the regular polygon cross section same as the regular polygon cross section of the upper fastening hole and the lower fastening hole. By inserting the fastening rod 300 having a hinge through the upper fastening hole and the lower fastening hole of the wall plate segment 200 to be able to adjust the inclination of the wall plate.

At this time, if additional retaining force is required to prevent the fall of the retaining wall or to support the collapsed cut slope 100, the ground reinforcement material 500 such as rock bolt or rock anchor is cut according to the characteristics of the cut slope 100. It may be possible to assemble the wallboard while additionally installing to the 100 and having the end fixed in the anchor hole of the wallboard segment 200.

Accordingly, the wall plate assembled and installed to the predetermined height in front of the collapsed cut slope 100 as shown in FIG. 5C serves as a form of formwork and constitutes a part of the wall of the retaining retaining wall.

Next, by filling and curing the filler 600 containing concrete between the assembled wall plate and the collapsed cut slope 100 as shown in Figure 5d to integrate with the wall plate to complete the wall of the retaining retaining wall, Figure 6 The front view of the field-assembled retaining wall according to the present invention is shown.

In addition, even before the filler 600 is cured, the self-supporting retaining wall wall is able to transmit its own weight to the cut slope 100 due to the wall plate assembled so as to be able to stand on its own. In addition, since additional processes such as formwork dismantling are no longer needed, the construction of the retaining retaining wall can be completed very quickly.

1A, 1B, 1C and 1D illustrate a method of constructing a conventional retaining wall.

2A, 2B and 2C show an embodiment of a wallboard segment of the invention.

3 and 4 show assembly views of the wallboard segments of the invention.

5A, 5B, 5C and 5D illustrate a method of constructing a field-mounted retaining wall according to the present invention.

Figure 6 shows a front view of the field-assembled retaining wall according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: cut slope 200: wall plate segment

300: Fastening bar 400: Foundation

500: ground reinforcement 600: filler

Claims (6)

In a will retaining wall comprising a foundation and a wall constructed on a cut slope, the wall is Acupressure portion of a rectangular plate shape, protruding formed on the upper surface of the acupressure portion and protruded to the lower surface of the acupressure portion so as to be hinged in correspondence with the upper fastening portion formed in the upper fastening hole in the horizontal direction and the upper fastening portion in the horizontal direction A wall plate formed by connecting a wall plate segment formed of a lower fastening part having a lower fastening hole horizontally and vertically to the cut slope; A fastening rod including a steel rod inserted into and fastened to the upper and lower fastening holes; And a concrete filler formed on the rear surface of the wall plate. The method of claim 1, The lower fastening portion of the wall plate segment is a rectangular parallelepiped block formed in the center of the lower surface of the shiatsu portion, and the upper fastening portion of the wall plate segment is a rectangular parallelepiped block formed on both sides of the upper surface of the shiatsu portion, and has a cross section symmetric to each other in a direction perpendicular to the horizontal direction. Field-mounted retaining walls formed so that the branches can be hinged to each other. The method of claim 2, The upper fastening portion of the wallboard segment is rounded with a rounded upper edge of the back surface, the upper fastening hole has a regular polygonal cross section, and the lower fastening portion of the wallboard segment is rounded with a rounded bottom surface of the lower surface, and the lower The fastening hole has a regular polygonal cross section same as that of the upper fastening hole, and the fastening rod has the same regular polygonal cross section as the upper fastening hole. The method of claim 2, The upper fastening portion of the wallboard segment is rounded with a plurality of bent surfaces at the upper side of the rear surface, and the upper fastening hole has a regular polygonal cross section, and the lower fastening portion of the wallboard segment has a plurality of bent surfaces at the bottom lower surface of the wallboard segment. Rounded, the lower fastening hole has the same polygonal cross section as the upper fastening hole, The fastening rod is a field assembly type retaining wall having the same polygonal cross section as the upper fastening hole. The method according to any one of claims 1 to 4, The field-assembled willing retaining wall is a field-assembled will retaining wall further comprises a ground reinforcement comprising a rock bolt or lock anchor is installed on the cut slope and the end is fixed to the wall plate segment. Constructing a base formed on the upper surface of the front lower ground of the cut slope to have the same height in a horizontal direction; Assembling the wall plate by hinge-connecting the wall plate segment to the upper part of the foundation and then hinge-connecting the wall plate segment to a predetermined height by one step; And And forming a filler including concrete between the assembled wall plate and the cut slope to integrate the wall plate with the wall plate.

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