KR20120125805A - Divided type pre-cast concrete retaining wall and method for manufacturing the same - Google Patents

Abstract

PURPOSE: A split type precast concrete retaining wall and a manufacturing method thereof are provided to be made in a large size with overcoming the limitation of traffic laws and to be easily installed in field. CONSTITUTION: A split type precast concrete retaining wall(1) comprises a main member(10), an extension foundation member(40), and a connection unit. The main member comprises a wall part(20) and a foundation part(30). The wall part is vertically extended upward on the foundation part. The foundation part is installed on the ground or a base surface of an area where a retaining wall is installed. The extension foundation member is coupled to the foundation part of the main member. The extension foundation member is formed to support the wall part with the foundation part. The connection unit couples the foundation part of the main member and the extension foundation member.

Description

Split type pre-cast concrete retaining wall and method for manufacturing the same

The present invention relates to a precast concrete retaining wall, and more particularly, to a split type precast concrete retaining wall formed by dividing the precast concrete retaining wall into a main member and an extension base member, and a manufacturing method thereof.

In general, retaining walls are installed on slopes to install structures such as land, roads, railways, parks, river banks, and the like.

Such retaining wall construction has been mainly carried out by installing reinforcing bars and formwork on the site and placing concrete. However, since the construction of the concrete retaining wall by site casting is carried out all the work for forming the retaining wall structure directly on site, the construction period is prolonged and the construction cost is high, so it is not economical and long-term vehicle restriction is required. There was a problem that the inconvenience and the risk of a safety accident is large.

In consideration of these problems, recently, a method of assembling L-shaped or inverted T-shaped precast concrete retaining wall prefabricated in a factory has been used.

The prefabricated concrete retaining wall has a high construction speed, and can be backfilled and repaired around the pavement immediately after installing the retaining wall, which can solve problems such as civil discomfort or safety accidents during construction, which is very effective for complex urban areas or urgent construction. .

However, such a conventional precast concrete retaining wall is limited in size because it is subject to restrictions such as mold height, axial weight, etc. when moving from the factory to the installation site. Therefore, there is a need for a precast concrete retaining wall that can overcome the limitations of the Road Traffic Act and is convenient for site installation.

In addition, conventional precast concrete retaining walls were fabricated using a mold (or formwork) configured so that a surface having a large area was formed parallel to the ground. However, when manufacturing the retaining wall in this way, there is a problem in that a large amount of time and cost is required to form a flat finish surface because the concrete placing area is wide. Therefore, there is a need for a method of manufacturing precast concrete retaining walls that can reduce the finished surface.

The present invention was conceived in view of the above problems, and can overcome the limitations of the road traffic law to make a large size and precast concrete that can minimize the area of the split type precast concrete retaining wall and finish surface for easy on-site installation It is to provide a method for producing a retaining wall.

An object of the present invention as described above, the main member including a base portion installed on the ground of the installation area and a wall portion extending vertically from the base portion; An extension base member installed on the ground and formed to be coupled to the base of the main member; It can be achieved by providing a divided precast concrete retaining wall comprising a; and a connecting unit for coupling the base and the extension base member of the main member.

At this time, it is preferable that the length of the extension base member in contact with the ground is equal to the length of the base portion of the main member in contact with the ground.

In addition, the connection unit, a plurality of connecting bolts formed on the base of the main member; A plurality of bolts formed on the extension base member; And a plurality of couplers for connecting the plurality of connection bolts and bolts.

The method of manufacturing a split precast concrete retaining wall as described above comprises the steps of: preparing a vertical precast mold formed to precast the main member with the front surface of the wall portion and the bottom surface of the foundation portion perpendicular to the ground; Placing concrete through an opening of the vertical precast mold corresponding to one side of the wall portion and the base portion of the main member; And when the poured concrete is hardened, dismantling the vertical precast mold and taking out the precast main member.

In this case, the divided precast concrete retaining wall may include an L-shaped retaining wall and an inverted T-shaped retaining wall.

According to the split-type precast concrete retaining wall according to the present invention as described above, since the heel of the base of the retaining wall is divided, a large size precast concrete retaining wall can be formed by dividing it into a size that satisfies the road traffic method, and thus is easy to carry. Convenient installation on site

In addition, since the divided precast concrete retaining wall according to the present invention can be manufactured vertically using a vertical precast mold, the rigidity is increased compared to the case of horizontal manufacturing, thereby minimizing cracking and breakage.

In addition, according to the manufacturing method of the precast concrete retaining wall according to the present invention, since the area of the bottom surface of the mold is minimized, the level management of the mold is easy.

In addition, according to the method of manufacturing a precast concrete retaining wall according to the present invention, since the setting of the reinforcing network of the mold and the mold cleaning are mostly made at the bottom of the mold, safety management is easy.

In addition, according to the method for producing a precast concrete retaining wall according to the present invention, since the mold is assembled after the rebar network is set, it is possible to accurately maintain the reinforcement coating.

In addition, according to the method of manufacturing a precast concrete retaining wall according to the present invention, the finishing surface becomes one side of the retaining wall, thereby minimizing the area of the finishing surface, thereby minimizing the problem of verticality and horizontality of the finishing surface.

In addition, according to the manufacturing method of the precast concrete retaining wall according to the present invention, since the height and shape of the concrete can be determined by a simple display, it is possible to easily produce products other than the edge face and the standard width.

1 is an exploded perspective view showing a divided precast concrete retaining wall according to an embodiment of the present invention;
2 is a perspective view of the split precast concrete retaining wall of FIG. 1 with a main member and an extension foundation member coupled thereto;
3 is a cross-sectional view taken along the line 3-3 of the divided precast concrete retaining wall of FIG. 2;
Figure 4a is a side view showing a state in which the main member of the divided precast concrete retaining wall is loaded on the truck according to an embodiment of the present invention;
4B is a plan view of the main member of the split precast concrete retaining wall loaded on the truck of FIG. 4A;
5 is a perspective view illustrating a case where an inverted T-shaped precast concrete retaining wall is cut at a wall;
6 is a perspective view showing an example of an L-shaped split precast concrete retaining wall;
7 is a flowchart illustrating a method of manufacturing a precast concrete retaining wall according to an embodiment of the present invention;
8 is a perspective view conceptually showing a vertical precast mold used in the method of manufacturing a precast concrete retaining wall according to an embodiment of the present invention;
9 is a schematic exploded perspective view of the vertical precast mold of FIG. 8;
10 is a perspective view conceptually showing a vertical precast mold used for producing a precast concrete retaining wall in which a soundproof wall is installed.

Hereinafter, exemplary embodiments of a split type precast concrete retaining wall and a method of manufacturing the same will be described in detail with reference to the accompanying drawings. Embodiments described below are shown by way of example in order to help understanding of the present invention, it should be understood that the present invention can be implemented in various modifications different from the embodiments described herein. However, in the following description of the present invention, if it is determined that the detailed description of the related known functions or components may unnecessarily obscure the subject matter of the present invention, the detailed description and the detailed illustration will be omitted. In addition, the accompanying drawings may be exaggerated in some of the dimensions of the components rather than being drawn to scale to facilitate understanding of the invention.

1 and 2, the divided precast concrete retaining wall 1 according to an embodiment of the present invention may include a main member 10 and an extension base member 40.

The main member 10 forms a main portion of the precast concrete retaining wall 1 and includes a wall portion 20 and a base portion 30.

The base part 30 is installed on the ground or foundation surface of the retaining wall installation region, and the wide bottom surface 33 is in contact with the ground or foundation surface of the installation region. Typically, the bottom surface 33 of the foundation 30 is formed in a rectangular shape. The bottom surface 33 of the base portion 30 may be formed in a rectangle having a length L2 and a width W2 of 2.5m x 3m or 2.5m x 2m. That is, the length L2 of the bottom surface 33 of the base part 30 can be 2.5 m according to the standard of the Road Traffic Act, and the width W2 can be 2 m or 3 m as needed.

The upper surface 34 of the base portion 30 may be formed to be inclined downward to both sides with respect to the portion connected to the wall portion 20. A plurality of connecting bolts 51 (refer to FIGS. 1 and 3) are installed at the rear surface 32 of the base part 30 to connect the extension base member 40. Each of the plurality of connecting bolts 51 is formed to protrude into a corresponding bolt groove 36. In addition, a coupling end 35 may be formed on the rear surface 32 of the foundation part 30 in a stepped manner for coupling with the extension base member 40.

The wall portion 20 extends vertically upward from the base portion 30. That is, the wall portion 20 and the base portion 30 are formed in one body without being separated to form a main member 10 having an approximately inverted T shape. The wall portion 20 is supported by the base portion 30 to block the soil from flowing down the inclined surface of the installation area. Typically, the width W1 of the wall portion 20 is formed to be the same size as the width W2 (about 2 m or 3 m) of the base portion 30, and the wall portion in the bottom surface 33 of the base portion 30 The height L1 to the upper end 23 of the 20 is formed to have approximately 7m. However, this is only an example, and the height L1 of the wall portion 20 of the main member 10 may be variously formed according to the needs of the installation area.

The wall portion 20 is formed so that the thickness becomes thinner from the base portion 30 to the upper end 23. Thus, the wall portion 20 is thinner than the thickness of the lower end of the upper end 23 is connected to the base 30. However, when the soundproof wall is installed on the upper end 23 of the wall portion 20, the upper end 23 of the wall portion 20 is formed thick so as to support the soundproof wall. That is, the thickness of the upper end 23 of the wall part 20 can be formed to be almost the same as the thickness of the lower end of the wall part 20. An example of the main member 10 'having the wall portion 20' in which the soundproof wall is installed is shown in FIG.

The extension base member 40 is coupled to the base portion 30 of the main member 10 and is formed to support the wall portion 20 together with the base portion 30. The width W3 of the extension base member 40 is formed to be the same as the width W2 of the base portion 20, and the bottom surface 43 is formed in a plane so as to be in close contact with the ground of the installation area. Typically, the length L3 of the bottom surface 43 of the extension base member 40 is determined according to the length L1 of the wall portion 20 to prevent the wall portion 20 from falling and to stably support it. . For example, when the length of the wall portion is 7m, the bottom surface 43 of the extension base member 40 may be formed to have a length (L3) of approximately 2.5m. That is, the bottom surface 43 of the extension base member 40 may be formed in a rectangular shape of approximately 2.5m x 2.0m or 2.5m x 3.0m.

The extension base member 40 may be provided with a plurality of bolts (not shown) for coupling with the base portion 30. The plurality of bolts may be integrally formed by inserting the extension base member 40 when manufacturing the concrete.

Alternatively, as shown in FIG. 3, the sheath tube 46 may be installed in the extension base member 40, and the reinforcing bar 52 having bolts may be installed using the sheath tube 46. That is, when the extension base member 40 is made of concrete, a plurality of sheath pipes 46 are inserted into positions corresponding to the plurality of connecting bolts 51 of the foundation part 30 to form a single body. Thereafter, reinforcing bars 52 having bolts 52a and 52b formed at both ends of the sheath pipe 46 are connected to the connecting bolts 51 of the base part 30. In detail, first, the coupler 50 is fastened to the connecting bolt 51 in the bolt groove 36 of the foundation part 30. Thereafter, reinforcing bars 52 having bolts 52a and 52b formed at both ends of the sheath pipe 46 are coupled to couple the bolts 52a with the coupler 50. Subsequently, the nut 53 is fastened to the bolt 52b on the other end 42 of the extension base member 40. After that, when the nut 53 is tightened with an appropriate torque, the extension base member 40 is firmly fixed to the base portion 30.

In addition, a plurality of fixing pins 59 may be used to strengthen the coupling of the base portion 30 and the extension base member 40 of the main member 10. To this end, a plurality of fixing holes 57 and 58 for fixing a plurality of fixing pins 59 are provided at one end 41 of the coupling end portion 35 of the base portion 30 and the corresponding extension base member 40. Is formed. At this time, the fixing pin 59 may be formed in two truncated cone shape or a cylindrical shape. The fixing holes 57 and 58 are formed in a shape corresponding to the shape of the fixing pin 59.

In this way, the inverted T-shaped retaining wall 1 is cut from the heel 38 of the base part 30 and separately formed into the main member 10 and the extension base member 40, and then the main member 10 and the main member 10 at the installation site. By using the method of making integral with the extension base member 40, the retaining wall exceeding the mold height, axial weight, etc. under the Road Traffic Act can be manufactured in the factory and transported to the installation site for use. 4A and 4B show a case in which the main member 10 of the split type precast concrete retaining wall 1 according to an embodiment of the present invention is loaded in the truck 70. Since the width W5 of the loading box 71 of the truck 70 is approximately 2.5 m and the length L5 is approximately 10-12 m, the main member 10 of the precast concrete retaining wall 1 according to an embodiment of the present invention is used. ) You can load two freely.

In order to manufacture the retaining wall exceeding the standard of the Road Traffic Act in a factory and transport it to the installation site, the wall portion 20 'may be formed as shown in FIG. However, in the case of cutting the wall portion 20 'as shown in FIG. 5, it is difficult to vertically and horizontally manage the joint due to the existing mold characteristics and concrete placing methods, and thus, the wall portion 20' is cut off at the foundation 30 It takes a lot of time and money to join it. In addition, since the bottom surface 33 'of the base portion 30' becomes a concrete pouring surface, that is, a finishing surface, accurate horizontal finishing is impossible. Therefore, even when the retaining wall installation reference surface is formed by accurately measuring the level when the retaining wall 2 is installed at the site, additional modifications to the horizontal and vertical of the retaining wall 2 are inevitable while the retaining wall 2 is installed. In addition, the joining portion 29 is about 1-1.5m from the bottom surface 33 'of the base portion 30' so that the portion of the portion blocked out for joining the base portion 30 'and the wall portion 20' is formed. Separate formwork and dismantling work and cotton finishing work are needed for filling work. Therefore, there is a problem that a lot of manpower is required in the filling operation and the consumption of the filling material is also very large.

In addition, the length of the base portion of the inverted T-shaped retaining wall can be formed short so that the retaining wall exceeding the standard of the Road Traffic Act is manufactured at the factory and transported to the installation site. However, in this case, the shortening of the heel length is unstable because the retaining wall is likely to fall. To prevent this, anchor piles can be installed on the heel of the foundation to reinforce the stability of the retaining wall. However, when the anchor file is constructed in this way, the manufacturing cost is high because the anchor file is forced, and the construction cost is increased because the driving equipment for driving the anchor file is required. If the retaining wall installation area is not secured with a separate work path for anchoring the anchor pile, the anchor pile must be constructed after the retaining wall is mounted. Therefore, the efficiency of crane and driving equipment for installing the retaining wall is reduced and the construction period is extended. have.

In the above, the case in which the heel 38 of the base portion 30 of the inverted T-shaped retaining wall 1 is cut and formed is described, but the same applies to the L-shaped retaining wall 3. An example of an L-shaped split precast concrete retaining wall 3 according to one embodiment of the invention is shown in FIG. 6.

Referring to FIG. 6, since the L-shaped retaining wall 3 corresponds to the case where the front heels 39 are not included in the inverted T-shaped retaining wall 1, the heel of the base portion 30 of the inverted T-shaped retaining wall 1 described above is described. The cutting of the 38 can be similarly applied to the L-shaped retaining wall 3.

Hereinafter, a method of manufacturing a split type precast concrete retaining wall for manufacturing the aforementioned inverted T-shaped retaining wall 1 in a factory will be described with reference to FIGS. 7 to 9.

In order to form the inverted T-shaped retaining wall as the split type precast concrete retaining wall 1 according to an embodiment of the present invention, a vertical precast mold 100 for manufacturing the main member 10 is first prepared (S10). . Here, the vertical precast mold 100 is a state in which the front surface 21 of the wall portion 20 is perpendicular to the ground, rather than the front surface 21 of the wall portion 20 of the main member 10 being a concrete pouring surface. By this means a mold having one side surface 25 of the wall portion 20 as a concrete pouring surface. Therefore, the conventional manufacturing method of placing concrete with the front surface 21 of the wall portion 20 or the bottom surface 33 of the foundation portion 30 in a horizontal state on the ground can be referred to as a horizontal manufacturing method, The precast mold used here may be referred to as a horizontal precast mold.

One example of the vertical precast mold 100 used in the method of manufacturing the split precast concrete retaining wall 1 according to the present invention is shown in FIGS. 8 and 9. FIG. 8 is a conceptual view of a vertical precast mold 100, and FIG. 9 is an exploded perspective view illustrating a case in which the main member 10 of the precast concrete retaining wall is separated by disassembling the vertical precast mold 100 of FIG. to be.

8 and 9, the vertical precast mold 100 includes a reference plate 101, a front plate 102, a back plate 103, a top plate 104, and a bottom plate 105. . The reference plate 101 is fixed to the ground and becomes the assembly standard of the other plates 102-105. The reference plate 101 corresponds to one side 26 of the main member 10. The front plate 102 is for forming the front surface of the main member 10, that is, the front surface 21 of the wall portion 20 and the upper surface 34 of the base portion 30, in front of the reference plate 101 It is installed perpendicular to the ground. The front plate 102 is bent based on the connection portion of the base portion 30 and the wall portion 20 so as to correspond to the front surface of the main member 10. The rear plate 103 is for forming the rear surface of the main member 10, that is, the rear surface 22 of the wall portion 20 and the upper surface 34 of the base portion 30, the rear of the reference plate 101 It is installed perpendicular to the ground. The back plate 103 is bent based on the connection portion of the base portion 30 and the wall portion 20 to correspond to the rear surface of the main member 10, the inclination and coupling end of the upper surface 34 of the base portion 30 It is bent in multiple stages to correspond to 35. The top plate 104 is for forming the top surface 23 of the main member 10, and is installed perpendicular to the ground on one side of the reference plate 101. The lower plate 105 is for forming the lower surface of the main member 10, that is, the bottom surface 33 of the base portion 30, and is installed perpendicular to the ground on the other side of the reference plate 101. The lower plate 105 may be further provided with a front bend blocking plate 106 for use in manufacturing the L-shaped retaining wall 3.

The reference plate 101, the front plate 102, the back plate 103, the top plate 104, the bottom plate 105 are all made of iron plates, and deformed by the pressure applied to each side during concrete pouring. So as not to be supported by a section steel or the like. 8 illustrates a case in which the support member 110 is installed, but the support member 110 is not illustrated in FIG. 9 for the convenience of drawing.

In addition, the reference plate 101, the front plate 102, the back plate 103, the top plate 104, the bottom plate 105, the connection of each part is opened or separated from each other by the pressure applied during concrete pouring It is fixed by the fixing means (not shown). Since the fixing means for connecting the respective plates may be the same as the fixing means used in the conventional retaining wall mold, a detailed description thereof will be omitted.

When the vertical precast mold 100 is prepared, concrete is poured through the opening 107 of the vertical precast mold 100, that is, the opening formed at the top of the mold (S20).

When the concrete is finished, the concrete is cured. When curing of the concrete is completed and the concrete is completely hardened, the vertical precast mold 100 is dismantled to take out the main body 10 of the precast concrete retaining wall 1.

The extension base member 40 may be manufactured using a vertical precast mold (not shown) for the extension base member such that the bottom surface 43 and the top surface 44 are formed perpendicular to the ground. In this case, since the structure of the vertical precast mold is similar to the vertical precast mold 100 for manufacturing the main member 10 described above, detailed description thereof will be omitted. Alternatively, since the extension base member 40 is not large in size, it may be manufactured in a state where the bottom surface is horizontal to the ground as in the prior art.

As such, when the main member 10 of the retaining wall is manufactured in a vertical state, rigidity is increased as compared with the case in which the main member 10 is manufactured in a horizontal state. Product damage is minimized.

In addition, if the main member 10 of the retaining wall is manufactured in a vertical state, the area of the bottom plate, that is, the reference plate 101 of the mold 100 is minimized, so that the level management and maintenance of the mold 100 is easy. In addition, since the operation of setting the reinforcing bar in the mold 100 and the main member 10 is separated from the mold cleaning operation is mostly performed on the bottom surface of the mold, safety management is easy.

In addition, the existing horizontal manufacturing method sets the rebar network after the mold assembly. Therefore, since the rebar space is pre-installed in the rebar network, the rebar network is installed in the mold because the rebar space is installed, the space coupled to the side of the rebar network may be dropped during the setting. In this case, it is difficult to maintain the reinforcing bar coating because the reinforcing bar is moved in the mold due to the vibration of the concrete placing and the compactor during the concrete placing. However, in the vertical manufacturing method such as the present invention, since the mold is assembled after the reinforcing bar network setting, it is possible to maintain accurate reinforcing bar coating.

In addition, the existing horizontal manufacturing method focuses on the simplicity of the mold and the work efficiency of concrete pouring work. The concrete pouring area requires a lot of time and manpower to manage the finish surface, Cost and manpower were required. However, when using the vertical manufacturing method, such as the present invention, the finishing surface is minimized, thereby minimizing the finishing surface management cost and manpower.

In addition, the standard width of the precast concrete retaining wall (1) is 2m, but when it is necessary to deform the cross-section or to reduce the width (W1, W2) of the retaining wall due to the constraints of the installation site, the conventional horizontal manufacturing method is a product In the same shape as the cross-sectional shape, a partition was made using a steel plate, or a product was cut into a standard cross-section. However, the vertical manufacturing method according to the present invention is advantageous in producing products other than the edge and the standard width because the height and shape of the concrete is determined by simple marking.

FIG. 10 is a conceptual diagram of a vertical precast mold 200 for manufacturing a main member 10 'of a precast concrete retaining wall when a soundproof wall is installed at the top 23a of the retaining wall as another example of an inverted T-shaped retaining wall. . The precast concrete retaining wall for installing the soundproof wall of FIG. 10 has been described above except that the thickness of the upper end 23a of the wall part 20a is substantially the same as the thickness of the lower end 24 of the wall part 20 'which is connected to the foundation part 30. It is the same as the general retaining wall 1.

In the above, the method of manufacturing the inverted T-shaped retaining wall 1 using the vertical row precast mold 100 has been described, but it can also be used to manufacture the L-shaped precast concrete retaining wall 3 shown in FIG.

1,2; Inverted T-shaped Precast Concrete Retaining Wall
3; L-shaped precast concrete retaining wall
10; Main member 20; Wall
30; Base 38; Foundation heel
39; Foundation front heel 40; Extension base member
100; Vertical precast mold 101; Reference plate
102; Front panel 103; Backplane
104; Top plate 105; Posterior edition
110; Supporting member

Claims (5)

A main member including a base portion installed on the ground of the installation area and a wall portion extending vertically from the base portion;
An extension base member installed on the ground and formed to be coupled to the base of the main member; And
Split precast concrete retaining wall comprising a; connecting unit for coupling the base and the extension base member of the main member. The method of claim 1,
Split length precast concrete retaining wall, characterized in that the length of the extension base member in contact with the ground is equal to the length of the base portion of the main member in contact with the ground. The method of claim 1,
The connection unit,
A plurality of connecting bolts formed at the base of the main member;
A plurality of bolts formed on the extension base member; And
Split precast concrete retaining wall comprising a; a plurality of couplers for connecting the plurality of connecting bolts and bolts. A method of manufacturing the split precast concrete retaining wall of claim 1, wherein
Preparing a vertical precast mold formed to precast the main member with the front surface of the wall portion and the bottom surface of the base portion perpendicular to the ground;
Placing concrete through an opening of the vertical precast mold corresponding to one side of the wall portion and the base portion of the main member; And
When the pour concrete is hardened, the vertical precast mold dismantled and the precast main member taken out; precast concrete retaining wall manufacturing method comprising a. The method of claim 4, wherein
The split type precast concrete retaining wall is a precast concrete retaining wall manufacturing method comprising an L-shaped retaining wall, an inverted T-shaped retaining wall.

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