KR100421058B1 - Precast concrete block for retaining wall - Google Patents

Abstract

PURPOSE: A precast concrete retaining wall block is provided to quickly and accurately assemble the front linearity and total level of the retaining wall block assembled and installed at the spot, to stably mount the lower end of the retaining wall block, and to easily perform sliding operations of the block for precisely setting the front linearity of the retaining wall. CONSTITUTION: A precast concrete retaining wall block(100) formed in an L shape or a reverse T shape is composed of a bottom plate(10) horizontally put on a base unit at which a retaining wall is mounted; a vertical wall(20) set up on the bottom plate; a plurality of nut pipes(11) vertically mounted at the bottom plate to hold the gravity center of the retaining wall block in balance; a plurality of leveling bolts(12) assembled to the nut pipes to vertically move and adjust the verticality and horizontality of the retaining wall block; and at least one concrete input port(13) arranged at the predetermined position of the bottom plate to vertically pass through the bottom plate. The lower side of the leveling bolt is contacted to the upside of the base unit to support load of the retaining wall block and formed in a round shape to point-contact to the upside of the base unit.

Description

Precast concrete block for retaining wall}

The present invention relates to a precast concrete retaining wall block designed in L-type or inverted T-type and prefabricated in a factory. In particular, the front linear and overall levels of retaining wall blocks assembled in the field can be easily and quickly and precisely adjusted. By stably fixing the lower end of the retaining wall block, the construction efficiency is greatly improved and the resistance to activity and conduction is further increased, and the present invention relates to a precast concrete retaining wall block capable of constructing a structurally safe retaining wall structure.

Previously, in retaining walls such as roads and railway slopes, slopes in park areas, river embankments, and coastal roads, concrete retaining walls have been constructed mainly through the construction of concrete pouring on site.

The construction of concrete retaining wall by site casting is generally proceeded by ground excavation-foundation concrete casting-concrete placement of this structure-backfill construction-repair of surrounding pavement.

Such a conventional retaining wall construction method has a number of problems as follows because all the work for forming the retaining wall structure is performed directly in the field.

In other words, since it takes a long period of time to form a concrete structure, such as formwork and dismantle to cast concrete in the field, and curing time of concrete is required, the construction period is prolonged. There was a falling issue.

In addition, there is a problem in that long-term exposure to the risk of causing a safety accident, as well as the inconvenience of citizens due to long-term vehicle blocking and securing a detour road.

In addition, since it is difficult to artificially express natural textures and geometric patterns, such as natural stone stacked on the front of the retaining wall, there was a problem that greatly damages the urban landscape by providing a dark and dull appearance that is not at all in harmony with the surrounding natural environment.

Accordingly, in recent years, methods for assembling and prefabricating precast concrete retaining wall blocks manufactured in advance in the factory are gradually spreading for shortening the air, economical construction, and beautiful aesthetics.

Prefabricated retaining wall blocks have a high construction speed and can be backfilled immediately after the block is installed and the surrounding pavement can be repaired to solve problems such as civil inconveniences, interruption of traffic flow, and unnecessary waste of time. It is very effective for urban construction.

In addition, since the retaining wall blocks are factory-produced through thorough quality control, the quality is uniform and high-strength concrete can be used to improve the watertightness and durability of the structure. It has many advantages, such as beautiful textures and geometric patterns.

The present applicant has been registered as a domestic utility model registration No. 20-0223145 by developing a sub-wall retaining wall block designed in L-shape as a precast concrete retaining wall block of the above concept.

The retaining wall block according to this registration proposal is to construct the retaining wall structure by completing the manufacturing of each unit in the factory and then transporting it to the site to assemble and install each unit.

Its construction involves first placing concrete foundation along the line where the retaining wall is to be installed and curing it, then laying mortar that has been raised on the foundation, and carrying retaining wall blocks with double lifter to connect retaining wall blocks on the mortar. After adjusting the location and height of the retained wall block, the level and front linearity of the entire blocks are adjusted, and the backfilling work and the surrounding restoration work are completed. .

In the construction process as above, the concrete foundation and the old mortar installed on it do not maintain a constant level or inclination, so they are formed irregularly.

However, the above registration proposal is not only difficult to move due to frictional force with the mortar installed in the lower part when sliding the retaining wall block in order to match the front linearity and verticality and horizontality of the retaining wall. It is pushed in the direction of the retaining wall block by the lower part of the wall, and the work efficiency is decreased and the front linear and You will not be able to match the vertical and horizontal levels correctly.

As a result, not only the appearance of the retaining wall is poor, but also a gap is formed between the lower surface of the retaining wall block and the foundation, so that it is impossible to be completely in contact with and bonded to each other. May cause defects caused by the phenomenon.

Conventionally, in order to prevent such defects, the lower end of the retaining wall structure is designed to be buried deeply or designed to be subjected to excessive embankment at the lower end of the front surface, which leads to an increase in construction cost, which is not an economically desirable method.

Therefore, the retaining wall block according to the applicant's registration proposal is a means for easily and accurately maintaining the vertical and horizontal degree of the retaining wall block when assembling and installing in the field, and for securing a firm fixing force and a supporting force at the bottom of the retaining wall block. It has been determined that the means should be taken, which is not only the above-mentioned registration proposal but also other conventional L-type or inverted-T retaining wall blocks that are manufactured at the factory.

The present invention is to solve the problems of the prior art in the assembly and installation after transporting the precast concrete retaining wall block is designed and assembled in the factory L-shaped or inverted T-type to the site. It was made.

Accordingly, an object of the present invention is to easily and quickly and precisely match the front linearity and overall level of the retaining wall blocks assembled and installed in the field, to stably set the lower end of the retaining wall block, and to precisely match the front linearity of the retaining wall. By providing a smooth sliding operation of the block, it is to provide a precast concrete retaining wall block that can significantly increase the construction efficiency and to build the retaining wall structure at a structurally safe and more economical cost.

It is still another object of the present invention to provide a precast concrete retaining wall block for integrating adjacent retaining wall blocks as a whole to further increase resistance to activity and conduction.

1 is an embodiment in which the technical configuration of the present invention is applied to an L-shaped retaining wall block, which is a perspective view of a retaining wall block having a pair of side walls at both sides.

2 is an embodiment in which the technical configuration of the present invention is applied to another L-shaped retaining wall block, and is a perspective view of the retaining wall block having one subwall at the center thereof.

3 is a perspective view of an embodiment in which an uneven portion is formed on a bottom surface of a bottom plate according to the present invention;

4 is a cross-sectional view of an embodiment in which the technical configuration of the present invention is applied to an inverted T block;

5 is a perspective view showing an embodiment of a retaining wall block installed at both ends of the retaining wall structure according to the present invention;

Figure 6 is a construction front view showing the primary level adjustment state using the retaining wall block according to an embodiment of the present invention

Figure 7 is a perspective view showing a state of fastening the neighboring retaining wall blocks to the connecting plate after completing the level alignment and level adjustment of the retaining wall blocks mounted on the foundation in accordance with an embodiment of the present invention

8 is a cross-sectional side view showing a state in which the front linear and level adjustment of the retaining wall blocks mounted on the foundation and the joining of the connecting blocks are completed and then bonded to the foundation with concrete;

9 is a plan view illustrating a state in which a retaining wall of a curved terrain is constructed using a retaining wall block according to an embodiment of the present invention;

<Description of Symbols for Main Parts of Drawings>

1: Foundation part 2: Double rod 3: Hoist string

4: Jackie 5: Earth and sand 6: Concrete

10: bottom plate 11: nut pipe 12: leveling bolt

13: concrete inlet 14: protrusion 20: vertical wall

21: Insert 22: Connection plate 23: Bolt

30: Buttress 31: Double rod insertion hole 40: Decoration surface

100: retaining wall block

The precast concrete retaining wall block of the present invention for achieving the above object is an L-type or inverted-T shape having a bottom plate horizontally mounted on the base of the position where the retaining wall is to be installed and a vertical wall erected upwardly from the bottom plate. Designed precast concrete retaining wall block,

A plurality of nut pipes buried perpendicularly to positions in the bottom plate capable of supporting the center of gravity of the retaining wall block in a balanced manner, and the vertical and horizontality of the retaining wall block while being assembled vertically by screwing the nut pipes It is provided with a plurality of leveling bolts that are grounded to the upper surface of the foundation to support the load of the retaining wall block in a state of being adjusted and maintained, and at least one concrete inlet penetrating up and down at a predetermined position of the bottom plate. In the precast concrete retaining wall block,

The leveling bolt provides a technical configuration, characterized in that its lower surface is rounded so as to be in point contact with the upper surface of the base portion.

In addition, by providing a concave-convex portion on the bottom of the bottom plate provides a technical configuration characterized in that the retaining wall block is inactive.

The uneven parts are formed by a plurality of protrusions repeatedly projecting downward at predetermined intervals.

In addition, it provides a technical configuration, characterized in that inserts having screw holes in the front and rear directions are embedded in upper and lower predetermined heights on both rear edges of the vertical wall.

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

1 to 9 is a construction example of a retaining wall block and a prefabricated retaining wall using the retaining wall block according to embodiments of the present invention, Figure 4 shows an embodiment of applying the technical configuration of the present invention to an inverted T-type block The rest of the drawings show an embodiment in which the technical configuration of the present invention is applied to an L-shaped block, and in the drawings according to these embodiments, components having the same name are denoted by the same reference numerals.

As shown in these figures, the precast concrete retaining wall block according to the present invention is an retaining wall block 100 having an L-shaped or inverted-T-shaped cross section, which is mounted horizontally on the base 1 of the seat where the retaining wall is to be installed. The bottom plate 10 and the vertical wall 20 erected upwardly from the bottom plate 10 are essentially provided, and the sub-wall 30 and the vertical wall which connect and reinforce the bottom plate 10 and the vertical wall 20 are provided. The decorative surface 40 is optionally further provided to decorate the front surface of the 20 with a predetermined shape, shape, and color that can produce a texture or geometrical pattern of a natural material.

A plurality of nut pipes 11 are vertically buried in the bottom plate 10 at positions capable of balancing the center of gravity of the retaining wall block.

The nut pipes 11 are pre-arranged in the mold and made to be integrally bonded to the concrete flesh injected into the mold when the block is manufactured. In order to most stably support the center of gravity of the block, FIG. As shown in the drawing, it is preferable to provide four systems each one around four corners of the bottom plate 10.

Leveling bolts 12 are screwed to the nut pipes 11, respectively. The leveling bolts 12 vertically move vertically and horizontally while vertically moving up and down, and the bottom surface thereof is grounded on the upper surface of the foundation 1 to support the load of the retaining wall block. Do this. At this time, the leveling bolt 12 is preferably rounded so that its bottom surface is in point contact with the top surface of the base portion 1 because it can minimize the frictional force with the base portion 1 during the sliding movement.

The bottom plate 10 is formed with a concrete inlet 13 penetrating up and down. The concrete inlet 13 is for use when fixing the bottom surface of the retaining wall block to the foundation 1 after completing the level adjustment of the retaining wall block of the present invention, the concrete inlet 13 in the accompanying drawings 4 is formed in the central portion of the bottom plate 10, but the installation location thereof may be changed as necessary.

The bottom surface of the bottom plate 10 is formed as a concave-convex portion as shown in FIG. 8 to secure a firm fixing force with the concrete foundation portion 1 to prevent the retaining wall block from moving forward and phenomena.

This uneven portion is a plurality of protrusions repeatedly projected downward at regular intervals as shown in Figure 3 so that the concrete injected between the base 1 and the bottom of the retaining wall block bottom plate 10 can be filled smoothly and tightly as a whole. It is preferable to form through 14. Of course, the uneven portion in the present invention is not limited to the shape of the projection shown in Figure 8, if necessary, it can be seen that it may be formed in a continuous linear projection or a grid-like structure along the longitudinal direction of the block.

As shown in FIGS. 1 and 2, the retaining wall block provided with the subwall 30 is provided with a double rod insertion hole 31 penetrating a predetermined position of the subwall 30 in the horizontal direction.

Here, in the retaining wall block shown in FIG. 1, a pair of subwalls 30 are provided on both sides of the bottom plate 10 to connect the bottom plate 10 and the vertical wall 20 so as to be reinforced. It is shown that the two double rod insertion holes 31 penetrate in the transverse direction at positions facing each other on one horizontal line.

The retaining wall block is inserted between the double rod insertion holes 31 and the double rod 2 having a relatively long length, which can cross between the pair of subwalls 30, and positioned between the pair of subwalls 30. In the middle of the double bar (2), the hoist string (3) of the heavy equipment is firmly hooked and lifted up.

In addition, in the retaining wall block shown in FIG. 2, a subwall 30, which is connected to the bottom plate 10 and the vertical wall 20 and reinforces, is provided on a horizontal center line in plan view, and the upper portion of the retaining wall block is disposed on the subwall 30. The middle rod insertion hole 31 is formed to penetrate in the horizontal direction, and one retaining wall block inserts the double rod 2 having a relatively short length into the double rod insertion hole 31, and the subwall 30 Both ends of the double bar (2) protruding to the both sides of the hoist rope (3) of the heavy equipment is firmly hung and lifted.

Inserts 21 having screw holes in the front and rear directions are embedded in both upper and lower edge portions of the rear surface of the vertical wall 20 at a predetermined height. The inserts 21 are mounted on the foundation 1 to connect and fix the blocks which are connected to each other. As shown in FIG. 7, the insert plates 22 are attached to the outside of the neighboring inserts 21 and bolted to each other. 23) to connect and fix the neighboring blocks.

Meanwhile, FIG. 9 shows a retaining wall block having a structure in which both end surfaces are formed in a width gradually decreasing inclined inward from the front surface to the rear surface.

The retaining wall block can be formed to bend or refracted in front of the retaining wall while adjusting the connection angle of neighboring blocks when installing the retaining wall block through the clearance between the rear surface formed to have a smaller width than the front surface. It has a wide range of applications, such as building a retaining wall of curved terrain that is curved or protrudes with an obtuse angle.

The retaining wall block shown in FIG. 8 has a structure in which the top height of the vertical wall 20 is gradually reduced in width as it is inclined downward from one side in the front to the other side, and the block is inclined at both end ends of the retaining wall structure. Provided for use.

Hereinafter, the preferred construction method of the prefabricated retaining wall using the retaining wall block is configured as described above.

In the retaining wall construction method of the present invention, first, the foundation 1 is installed by pouring concrete along a predetermined line where the retaining wall is to be installed.

After the concrete curing of the foundation is completed is mounted on the base 1 while connecting the retaining wall blocks 100 produced in the factory structure as described above. At this time, as shown in Figs. 1 and 2, the double bar (2) is inserted into the double bar insertion hole (31) formed in the subwall (30), and the hoist cord (3) of the heavy equipment is hanged on the double bar (2). I am serious. Retaining wall blocks according to the present invention can thereby be moved safely.

Next, as shown in FIG. 6, jack keys 4 are placed below four corners of each unit retaining wall block 100 mounted on the foundation 1, and the height is adjusted so that the whole mounted on the foundation 1 is adjusted. The level of the retaining wall blocks 100 is primarily adjusted.

Subsequently, the leveling bolts 12 coupled to the nut pipes 11 are rotated downward until they are grounded on the upper surface of the base 1 so that the retaining wall block 100 supported by the jack key 4 is rotated. Transfer the load to the leveling bolts 12 to support them.

Next, fine adjustment of the leveling bolts (12) to uniformly precisely match the overall linear and front level of the retaining wall blocks 100 mounted on the foundation (1).

At this time, according to the retaining wall block 100 according to the present invention, since the bottom surface of the leveling bolt 12 in contact with the base portion 1 is formed to be in round contact with the top surface of the base portion 1, the frictional force with the base portion 1 Is minimized and can be easily moved accordingly.

As described above, after uniformly matching the front linear and the overall level of the retaining wall blocks 100 mounted on the foundation part 1, the jack keys 4 between the foundation part 1 and the retaining wall blocks 100 are removed. .

In addition, as shown in FIG. 7, the neighboring blocks are fastened by fastening the connection plate 22 to the outside of the inserts 21 of the neighboring retaining wall blocks 100 by bolts 23.

At the same time, the front and rear surfaces of the retaining wall blocks 100 and the bottom of the outermost side surface are filled with the surrounding soil 5 to block edge gaps between the upper surface of the base 1 and the retaining wall block 100.

Then, as shown in FIGS. 8 and 9, the concrete 6 is pressure-injected through the concrete inlet 13 formed in the bottom plates 10 of the retaining wall blocks 100 so that the upper surface and the bottom plate of the foundation part 1 ( Fill tightly between the bottom of 10). At this time, the concrete 6 is also injected between both sides of the neighboring retaining wall blocks 100 to connect the neighboring blocks integrally.

Injected concrete 6 is blocked by the soil 5 embedded in the front and rear and outermost side bottom of the retaining wall block 100, the retaining wall block neighboring between the upper surface of the base 1 and the bottom of the bottom plate 10 Filled only between the sides of the (100) and will not flow out.

As such, the concrete 6 filled between the upper surface of the base 1 and the bottom of the bottom plate 10 joins the bottom surface of the bottom plate 10 of the retaining wall block 100 and the upper surface of the base 1 to form a bottom plate. In the case of the retaining wall block 100 in which the uneven portion is formed in (10), more secure fixing force can be secured. Accordingly, even when the lower portion of the retaining wall is buried shallowly or the front soil in front of the retaining wall is applied in small scale, the retaining wall structure is structurally more stable You will get

Installation of the retaining wall block of the present invention is finished through the above series of operations, and then finishes the prefabricated retaining wall construction through the process of backfill construction and surrounding repair construction.

On the other hand, the installation work of the retaining wall block as described above may be a whole construction of the entire section to be installed the retaining wall, but preferably to divide the entire section to be installed the retaining wall is divided into several unit sections (for example, the entire section is 100m In the case of 10m per division, the installation of the above blocks is repeated 10 times), which is advantageous in terms of construction management.

As described above, according to the precast concrete retaining wall block of the present invention, first, it is possible to easily and quickly and precisely match the overall linear level and overall level of the retaining wall blocks that are manufactured and installed at the factory.

Second, not only is it structurally safe by firmly fixing the lower end of the retaining wall block, but the neighboring retaining wall blocks are integrally connected and integrated, so that the retaining wall structure is more resistant to activity and conduction.

Third, since there is no need to bury the lower part of the retaining wall deeply or to carry out the front soil in front of the retaining wall on a large scale, construction management and construction efficiency can be greatly improved, and the retaining wall structure can be constructed at a more economical cost.

Fourth, it is possible to smoothly perform the lifting operation of the block for precisely matching the front wall of the retaining wall block with the lifting work of the retaining wall block greatly improves the construction.

Fifth, according to the retaining wall block of the present invention, there is an advantage that can be applied to the construction of the retaining wall of a curved terrain as well as a straight section using one type of block.

Sixth, since the block of the present invention is completed at the factory, it is possible to maintain a high quality and durability while producing a variety of textures and beautiful geometric patterns of natural materials.

As described above, the present invention can improve the workability and construction management efficiency of the retaining wall structure that is prefabricated, improve the structural stability, greatly reduce the construction cost, decorate a beautiful city, etc. It is a very useful invention which shows various effects.

Claims (14)

Precast designed in L type or inverted T type with bottom plate 10 horizontally mounted on base 1 of the wall where retaining wall is to be installed and vertical wall 20 erected upwardly from bottom plate 10. Concrete retaining wall block 100, a plurality of nut pipes (11) embedded in the bottom plate 10 perpendicular to the positions that can support the center of gravity of the retaining wall block 100, and the nut pipe (11) Screws are assembled to the upper and lower parts of the retaining wall block while vertically moving vertically and horizontally while the lower surface is grounded on the upper surface of the base 1 to support the load of the retaining wall block. In the precast concrete retaining wall block (100) having a leveling bolt (12) and at least one concrete inlet (13) penetrating up and down at a predetermined position of the bottom plate (10), the leveling bolt (12) ) The lower surface of the base (1) Precast concrete retaining wall block is characterized in that the rounded contact with the upper surface. delete delete delete The precast concrete retaining wall block according to claim 1, wherein the retaining wall block is inactivated by forming an uneven portion at the bottom of the bottom plate. The precast concrete retaining wall block according to claim 5, wherein the uneven parts are formed by a plurality of protrusions 14 which protrude downwardly at predetermined intervals. delete The precast concrete retaining wall block according to claim 1, wherein inserts (21) having screw holes in the front and rear directions are embedded in both upper and lower edges of the rear wall of the vertical wall (20). delete delete delete delete delete delete