KR101707523B1 - Precast concrete block for cascade retaining wall for slope protection And method of constructing a retaining wall using the same - Google Patents

Abstract

The present invention relates to a precast concrete block for terraced retaining wall construction for slope reinforcement and rapid construction, and a retaining wall construction method using the same. In detail, a precast concrete block is molded to include both sides and a rear side being open and only a top plate, a front plate, and a bottom plate being integrally formed, to allow a side cross-section to have an angular C-shape. A cement concrete injection hole, with which a stopper is detachably coupled, is formed in front and rear parts of the center of the top plate to inject concrete into a space portion formed between a slope and the inside of the precast concrete block. A side plate for preventing concrete and soil from leaking is further formed on a left side or a right side of precast concrete blocks installed at both ends of the slope. When the precast concrete blocks are installed in the front of the slope to be terraced, a respective interlayer of blocks is installed in a zigzag pattern to be engaged in half with respective blocks, located in the upper and lower parts of adjacent blocks in a horizontal direction. Therefore, since a separate mold or the like is not required, time, construction costs, labor costs, and the like caused by slope reinforcement construction may be significantly reduced. The outer appearance of the precast concrete blocks may be prevented from being damaged by leaked mortar. Damage to a retaining wall for slope reinforcement may be significantly reduced. In addition, double construction may be prevented and damage to a retaining wall caused by an anchor, soil nailing, or the like may also be prevented.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete block for cascade retaining wall construction for slope reinforcement and rapid construction, and a method of constructing a retaining wall using the precast concrete block for cascade reinforcement and rapid construction.

[0001] The present invention relates to a precast concrete block for laying a stepped retaining wall for slope reinforcement and rapid construction, and a method of constructing a retaining wall using the precast concrete block. More specifically, The pre-cast concrete block is installed on the front surface of the slope, and another plurality of blocks are installed in a stepped manner on the upper part of each block, wherein each of the inter-layer blocks includes blocks adjacent to each other in the transverse direction, And then injected cement concrete into the space between the inside and the slope of each block through the pierced cement concrete injection hole on the upper surface of each block. Time, construction cost and labor cost can be greatly reduced, and the damage of the retaining wall for slope reinforcement can be minimized. The present invention relates to a precast concrete block for laying a cascade retaining wall for slope reinforcement and rapid construction, and a method for constructing a retaining wall using the precast concrete block for preventing the double construction and preventing damage to the retaining wall by anchor or soil nailing .

Recently, the global environment has been rapidly changing due to global warming, etc., and the slope collapse including landslides due to heavy rain has repeatedly been caused, causing damage to the people and property damage.

On the other hand, methods for stabilizing the slope of the slope include a retaining wall method in which a tombstone is cut and a reinforced earth retaining wall and a concrete retaining wall are installed, and an anchor rehabilitation method in which anchor materials such as soil nailing and earth anchor are installed in the ground.

Among these, the retaining wall method using concrete retaining wall widely used is to form a foundation by digging the ground of the retaining wall construction site in order to prevent the sediment from flowing down or leaking from the civil engineering site such as the incision site, To form a retaining wall, which is advantageous in that the stability of the ground can be enhanced.

However, since the concrete retaining wall method is an on-site concrete, its quality is unstable and it is difficult to precisely manage it, and cracks of concrete (more severe in the case of receiving earth pressure) are generated.

In addition, the above-mentioned concrete retaining wall construction method has a problem that the construction cost is excessively high, such as material cost, labor cost, construction date, etc. for the formwork, and the work can not be performed in the case of rainy weather, especially during the cold winter season and rainy season. There is a problem in that it is not easy.

In addition, since the concrete retaining wall method has a retaining wall in the form of a vertical wall, it is not possible to maintain the inclined line of the ground, and in order to ensure safety against arc breakage, a retaining wall must be installed deep inside the slope, Is increased.

In order to solve such a problem, conventionally, concrete blocks previously formed in the shape of a rectangular housing or the like are laminated stepwise to form a retaining wall, thereby reducing slope of the ground and reducing the amount of cut to reduce air and air, In addition, the reinforced earth retaining wall construction method, which can provide a vegetation space, has environmentally friendly elements. In the case of such a stepped retaining wall, the retaining wall of the press earth effect is installed without causing any damage such as perforation. This makes it possible to solve the problem of insufficient construction and to increase the stability of the slope and is widely used.

In this case, the stepped retaining wall is a stepped shape formed to suppress the active block and to protect the cut surface when the planar activity is expected by the discontinuity developing on the cut slope or when the instability of the cut slope due to the fracture development such as the fault layer is expected. Concrete retaining wall.

In the case of most of the cascade retaining walls in the prior art, the formwork is installed on the site and the cascade retaining wall is installed. In consideration of the bearing capacity of the formwork and the weight of the concrete mortar, Of the concrete is cured, and then it is necessary to construct one step from the lower part to the upper part, so that the air takes a very long time and the cost is high. Especially, in case of the collapsed slope, And the construction of a countermeasure method after installing the facility.

In addition, a lot of manpower is required to install the mold for the stepped retaining wall construction, and there is a risk of dealing with the iron product. In the case of the stepped retaining wall by molding, the construction joint of the retaining wall is formed in a row, Which has a limit of resistance against collapse of the bridge.

Particularly, in the case of "a PC panel which does not require dies to which a method of replacing a stepped-type retaining wall for slope reinforcement is applied" proposed in Korean Patent Registration No. 10-1419863 of the prior art, a PC panel made of a wall- It is possible to construct concrete without mortar in this case. However, it is necessary to wait until the concrete mortar is solidified (ie, cured) after installing the stair of step 1, Because it is a method of installing a stairway, there is a problem that the construction period takes longer than the case where a formwork is installed and a three-step staircase is installed once.

Meanwhile, in the past, in order to increase the resistance of the torsion collapse during the embankment construction of a large scale slope, or to stabilize the slope when the slope collapse is severe, the concrete retention wall method or the reinforced earth retaining wall method as described above may be used as the soil nailing or earth anchor And anchor rehabilitation methods such as the above are used together to stabilize the slope.

For example, block type reinforced earth retaining walls are placed on the slope surface, and concrete rocks are deeply embedded within the slope, and the reinforcing net is connected between them. Thus, the load on the outer surface of the slope is dispersed through the retaining wall And a method of distributing the load on the inner surface of the slope by transferring the load to the concrete mass (Patent Registration No. 0247361, 'Construction method of block type reinforced earth retaining wall').

However, the above-mentioned construction method of a block type reinforced earth retaining wall requires a simple form of a reinforcing net to transmit the load of the upper body, so that the upper body is not properly transmitted, and the block type It is structurally problematic because it is weak to the horizontal shear force because it is required to support the surface of the slope with the reinforced earth retaining wall so that it can not sufficiently perform its role as a load supporting point.

In addition, such conventional methods have a problem in that, when partial collapse occurs on the slope, the slope can not be restored to the state before the collapse while maintaining the existing slope inclination.

Korean Registered Patent No. 10-1419863 (Jul. 09, 2014) Korean Registered Patent No. 10-0943220 (February 11, 2010) Korean Registered Patent No. 10-0691610 (February 28, 2007) Korean Registered Utility Model No. 20-0304540 (Feb. 04, 2003)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a pre-cast concrete block in which a plurality of precast concrete blocks each having a " At the upper part of the block, another plurality of blocks are installed in a multistage manner, and each interlayer block is installed in a staggered manner so that blocks adjacent to each other in the transverse direction are engaged with blocks located at the upper and lower sides, respectively, Cement concrete is injected into the space between the inside and the slope of each block through the pierced cement concrete injection hole on the upper surface of the block. Then, the cement concrete injection holes are closed with a stopper to prevent the leakage of cement concrete, And the construction cost and labor cost can be greatly reduced, and the leakage cement concrete It is possible to minimize the damage of the retaining wall for slope reinforcement and to prevent the double construction and to prevent the damage of the retaining wall by the anchor or the soil nailing, The present invention provides a precast concrete block for a cascade retaining wall construction for reinforcement and rapid construction, and a method of constructing a retaining wall using the precast concrete block.

It is another object of the present invention to provide a method for preventing blocks from being pushed by cement concrete and earth pressure when blocks are installed on the precast concrete block and the lower plate in a multi-step manner in front of the slope, And when the blocks are stacked in a staggered manner over the water layer, the rear portion of the lower block plate of the upper layer excluding the block located at the lowermost portion is supported by the supporters which are erected vertically in the slope, It is possible to prevent the blocks from flowing due to the load, thereby securing the safety in the work, as well as improving the safety and durability of the retaining wall, and precast casting for the cascade retaining wall construction for rapid construction A concrete block and a method of constructing a retaining wall using the same The.

It is a further object of the present invention to provide a method of installing a soil nail anchor insertion hole or an extension pipe for insertion in a front plate of each precast concrete block, Precast concrete block for slope reinforcement for slope reinforcement and rapid construction of retaining wall which can securely improve safety and durability of slope by strengthening fixing force to retaining wall by firmly fixing to slope through insertion hole or extension pipe for insertion And a method for constructing a retaining wall using the same.

It is a further object of the present invention to provide a docking jaw protruding from a front part of a precast concrete block at a predetermined height in a transverse direction to collect dirt and rocks falling from the upper part of the retaining wall, It is possible not only to prevent safety accidents caused by sloping and falling rocks falling from the upper part of the retaining wall, but also to protect the retaining wall itself in an environmentally friendly and beautiful manner And a method for constructing a retaining wall using the precast concrete block for the stepped retaining wall construction for slope reinforcement and quick construction.

In order to achieve the above object, the precast concrete block of the present invention is constituted by a precast concrete block for stair-step retaining wall construction for slope reinforcement and rapid construction, which are installed in a stepped manner in multi- The concrete block is formed so as to have a shape of a "C" shape on its both sides and the back surface, and is formed integrally with only the upper plate, the front plate and the lower plate. The front and rear portions of the upper plate include the inside of the precast concrete block A cement concrete injection hole into which a cap is detachably coupled to inject a cement concrete into a space formed between the slope and the slope is formed on the left or right side of the precast concrete blocks provided on both sides of the slope, And a side plate for preventing leakage of the gravel, When the precast concrete blocks are installed in a stepwise manner in the front part of the slope, the inter-layer blocks are staggered in a manner of engaging with the blocks located on the upper and lower sides of the blocks adjacent to each other in the transverse direction, .

The blocks of the precast concrete blocks are further provided with block fastening means or block skid prevention means on both sides of the upper plate and the lower plate front to prevent the blocks from being pushed by the earth pressure of the cement concrete or slope. do.

At this time, the block fixing means forms a plurality of fixing pin insertion holes at predetermined intervals in the longitudinal direction on both the rear portion of the upper plate and the front portion of the lower plate of the precast concrete blocks, so that the precast concrete blocks are stacked in a multi- A fixing pin is inserted into a plurality of fixing pin insertion holes formed in the upper plate and the lower plate of the precast concrete blocks respectively positioned on the lower side and the lower fixing plate insertion holes in the upper and lower directions, So that it can be fixed.

In one embodiment of the block-slipping prevention means, a pair of engaging grooves and an engaging protruding portion having longitudinal or transverse trapezoidal shapes in longitudinal cross section are formed on both sides of the upper plate rear portion and the lower plate front portion of the precast concrete blocks in the longitudinal direction When the precast concrete blocks are stacked in a multi-step manner, the bottom of the precast concrete block located at the top of the precast concrete block is inserted into the bottom of the precast concrete block.

At this time, a wavy concavo-convex portion is further formed in a lateral direction on the inner surface of the pair of engaging grooves formed in the longitudinal direction on both the rear portion of the upper plate and the front portion of the upper plate of the precast concrete blocks, The concave and convex portions of the lower plate of the precast concrete block located at the upper portion are inserted into the longitudinal grooves of the upper plate of the precast concrete block located at the lower portion and the concave and convex portions And the precast concrete block located at the upper portion is prevented from being pushed forward.

In another embodiment of the block-slipping prevention means, a wavy concavo-convex portion is formed laterally in the rear portion of the upper plate and the outer surface of the lower plate front portion of the precast concrete blocks, and the precast concrete blocks are stacked in a multi- The uneven portion of the lower plate of the precast concrete block located at the upper portion and the upper plate uneven portion of the precast concrete block located at the lower portion are staggered from each other to prevent the precast concrete block located at the upper portion from being pushed forward. do.

In addition, the soil nail anchor insertion hole is further formed at a center of the front plate of the precast concrete blocks so as to be inclined at a predetermined angle toward the lower part.

In this case, an extension pipe coupling pipe is further provided in the soil nail anchor insertion hole so that a part of the inner end portion protrudes to the inside of the precast concrete block.

Further, an extension pipe for inserting a soil nail anchor is further provided between an outer surface and an inclined surface of an end of the pipe connecting pipe protruding inward of the precast concrete block. After the cement concrete is cured, the extension pipe coupling pipe and the soil nail anchor insertion tube A hole for attaching the soil nail anchor is inserted in the ground, and a soil nail anchor having a predetermined length is inserted through the extension pipe coupling tube and the extension pipe for insertion of the soil nail anchor and the hole for installing the soil nail anchor .

In addition, a supporter fixing groove is further formed in the rear part of the lower plate of the precast concrete block. When the blocks are laminated in a staggered manner over the water layer, the rear part of the upper layer blocks except for the block located at the lowermost part, And is supported by a supporter that is built up.

Further, in the front part of the upper plate of the precast concrete blocks, a latching jaw for a dike for providing a gravel and a rockfall collecting and planting habitat space is further protruded at a predetermined height in the transverse direction.

To achieve the object of the present invention, there is provided a method of constructing a retaining wall using a precast concrete block, comprising the steps of: providing a block fixing means or a block- A plurality of pre-cast concrete blocks are stacked in a multi-step manner, and precast concrete blocks integrally provided on the left or right side of the slopes are provided on both sides of the slopes, A step of staggering the blocks placed at the upper and lower sides of the blocks so as to engage with the blocks, respectively; Supporting the supporters in a vertical direction between a rear portion and a slope of a lower block of the upper layer except the block located at the lowermost end; The cement concrete is injected into the space formed between the slope including the inner space portion of the blocks through the cement concrete injection hole formed in the upper plate of each block, And pouring the concrete by injecting the concrete.

In addition, when a plurality of precast concrete blocks are stacked in a stepwise manner at the front portion of the incision slope, a process for installing a sole for anchor nail anchor is provided between the outer surface and the slope of the end portion of the extension pipe coupling tube protruding inward of the block and; A step of drilling a hole for installing a soil nail anchor on the ground by inserting a file of the perforator through the extension pipe coupling pipe and the extension pipe for inserting the soil nail anchor after cement concrete curing; And a step of inserting a soilless nail anchor having a predetermined length through the extension pipe coupling pipe, the extension pipe for inserting the soil nail anchor, and the hole for installing the soil nail anchor drilled in the ground.

As described above, according to the precast concrete block for slab reinforcement and quick construction for slope reinforcement and rapid construction of the present invention and the method for constructing a retaining wall using the same, it is possible to provide a multi- And a plurality of blocks are provided in a stepped manner on the upper portion of each of the blocks, wherein each of the inter-layer blocks includes blocks adjacent to each other in the transverse direction, The cement concrete injection holes are inserted into the space between the inside and the slope of each block through the cement concrete injection hole drilled on the upper surface of each block. To prevent leakage of the mortar, so that the time and construction cost of slope reinforcement construction It is possible to prevent the damage of the exterior of the precast concrete blocks due to the leaked mortar and to minimize the damage of the retaining wall for slope reinforcement and to prevent the double construction, It is possible to prevent the retaining wall from being damaged by the nailing.

Secondly, when the blocks are fixed on the precast concrete block and the lower plate and the blocks are prevented from being pushed by the cement mortar and earth pressure when the blocks are installed stepwise in front of the slope, , And when the blocks are stacked in a staggered manner over the water layer, the rear portion of the lower block plate of the upper layer excluding the block located at the lowermost portion is supported by the supporters standing upright in the vertical direction from the slope, It is possible to secure the safety in the work, as well as to greatly improve safety and robustness against the retaining wall.

Third, a soil nail anchor insertion hole or an extension pipe for insertion is installed on the front plate of each precast concrete block. In each block front plate laminated and combined in a stepped shape, a soil nail anchor is inserted into the soil nail anchor insertion hole So that the safety and rigidity of the slope can be greatly improved by enhancing the fixing force to the retaining wall.

Fourth, in the front part of the precast concrete blocks, the ducking jaws are protruded at a predetermined height in the transverse direction, so that it is possible not only to collect the gravel and rocks falling from the upper part of the retaining wall, It is possible not only to prevent a safety accident caused by sloping and falling rocks falling from the upper part of the retaining wall, but also to protect the retaining wall itself in an environmentally friendly and beautiful manner by planting various plants It is an invention.

1 is a perspective view of a precast concrete block to which a first embodiment of the present invention is applied (block fixing means).
FIG. 2 is a stacked perspective view of precast concrete blocks to which the second embodiment of the present invention is applied (one embodiment of block skid prevention means). FIG.
3 (a) and 3 (b) are plan and bottom perspective views of the precast concrete block illustrated in FIG. 2;
4 (a) and 4 (b) are views showing a pre-cast concrete block in which the second embodiment of the present invention is applied (in one embodiment of the block-sliding preventing means) Flat and bottom perspective view.
5 is a laminated-state side sectional view of precast concrete blocks to which the second embodiment of the present invention is applied (one embodiment of the block-slip prevention means).
6 (a) and 6 (b) are plan and bottom perspective views of a precast concrete block to which another modification of the second embodiment of the present invention is applied.
7 is a cross-sectional view of the precast concrete blocks shown in Figs. 6 (a) and 6 (b). Fig.
8 (a) and 8 (b) are plan and bottom perspective views of a precast concrete block to which the third embodiment of the present invention is applied (another embodiment of block skid prevention means).
Fig. 9 is a laminated-state side cross-sectional view of a precast concrete block to which the third embodiment of the present invention is applied (another embodiment of block skid prevention means). Fig.
10 is a side cross-sectional view of a state in which a retaining wall is installed on a slope front portion using precast concrete blocks to which the present invention is applied.
11 is a process diagram for explaining a construction method of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention and their operation and effect will be described in detail with reference to the accompanying drawings.

It is to be understood that the terminology or words used herein are not to be construed in an ordinary sense or a dictionary, and that the inventor can properly define the concept of a term to describe its invention in the best possible way It will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Fig. 1 is a perspective view of a precast concrete block to which a first embodiment of the present invention is applied (block securing means), Fig. 2 is a perspective view of a precast concrete block to which a second embodiment of the present invention is applied A stacked perspective view of concrete blocks. 3 (a) and 3 (b) are plan and bottom perspective views of the precast concrete block illustrated in FIG. 2.

4 (a) and 4 (b) are views showing a case where the second embodiment of the present invention is applied to the pre-cast concrete block to which the side plate is integrally provided on the right or left side, And FIG. 5 is a laminated-state side sectional view of the pre-cast concrete blocks to which the second embodiment of the present invention is applied (one embodiment of the block-sliding preventing means).

6 (a) and 6 (b) are a plan view and a bottom plan view of a precast concrete block to which another modification of the second embodiment of the present invention is applied, and Fig. 7 is a cross- 8A and 8B are a plan view and a bottom perspective view of a precast concrete block to which the third embodiment of the present invention is applied (another embodiment of the block-sliding preventing means) . Fig. 9 is a laminated-state side sectional view of precast concrete blocks to which the third embodiment of the present invention is applied (another embodiment of the block-sliding preventing means). Fig.

10 is a side sectional view of a state in which a retaining wall is installed in a slope front portion using precast concrete blocks to which the present invention is applied, and FIG. 11 is a process diagram for explaining a construction method of the present invention.

According to the precast concrete block of the present invention,

In constructing the precast concrete block 2 for stepwise reinforcement for slope reinforcement and rapid construction, which is installed in a stepped manner in a multistage manner at the front part of incision slope 1,

The front and back surfaces of the precast concrete block 2 are integrally formed with the upper plate 21, the front plate 22 and the lower plate 23 so as to have a " The plug 25b is detachably attached to the center front and rear portions of the front and rear portions of the precast concrete block 2 in order to inject the cement concrete 3 into the space portion formed between the front and rear portions of the precast concrete block 2, The cement concrete injection holes 25a are formed on the left and right sides of the precast concrete blocks 2 provided on both sides of the slope 1 so as to prevent the leakage of the cement concrete 3 and the slope When the precast concrete blocks 2 are installed in a multistage manner in a front part of the slope 1, the inter-layer blocks are divided into blocks of adjacent blocks in the transverse direction, Blocks located below Respectively, in a zigzag manner.

In order to prevent the respective blocks from being pushed by the soil pressure of the cement concrete 3 or the slope 1 at both the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2 Characterized in that the block fixing means (26) or the block anti-skid means (27) are further formed.

At this time, the block fixing means (26)

A plurality of fixing pin insertion holes 261 are formed on the both sides of the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2 at predetermined intervals in the longitudinal direction, 2 of the pre-cast concrete blocks 2 located on the upper and lower sides of the upper and lower plates 21 and 23, respectively, In which the fixing pins 262 are inserted into the fixing pin insertion holes 261 which are mutually coincident with each other so that the precast concrete blocks 2 stacked up and down can be fixed so as not to be separated from each other .

As an embodiment of the block-skidding preventing means 27,

A pair of engaging grooves 271 and an engaging protruding portion 272 having longitudinal and transverse trapezoidal shapes on both sides of the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2, And when the precast concrete blocks 2 are stacked in a multi-step manner, the protrusions 272 of the lower plate 23 of the pre-cast concrete block 2 located at the upper part are located in the lower part of the precast concrete Is inserted into the engagement groove (271) of the upper plate (21) of the block (2).

At this time, the inner surface of a pair of the engagement grooves 271 formed in the longitudinal direction at both the rear portion of the upper plate 21 of the precast concrete blocks 2 and the front portion of the front portion of the lower plate 23, 273 and 274 having a wavy shape in the direction of the width of the precast concrete block 2 are formed in the lower plate 23 of the precast concrete block 2 positioned at the upper part when the precast concrete blocks 2 are stacked in a multi- A concave and convex portion 273 (hereinafter referred to as " convex portion ") formed in the longitudinal direction to be inserted into the longitudinal groove 271 of the upper plate 21 of the precast concrete block 2, 274 are joined to each other so as to prevent the precast concrete block 2 located at the upper portion from being pushed forward.

As another embodiment of the block-advance preventing means 27,

The precast concrete block 2 is formed by forming wavy concavo-convex portions 275 and 276 in the lateral direction on the rear portion of the upper plate 21 of the precast concrete blocks 2 and on the outer surface of the front portion of the lower plate 23, The concave and convex portions 276 of the lower plate 23 and the concave and convex portions 275 of the upper plate 21 of the precast concrete block 2 positioned at the lower portion of the precast concrete block 2 Are combined with each other to prevent the precast concrete block 2 located at the upper part from being pushed forward.

In addition, the sheet nail anchor insertion hole 28 is further formed at a center of the front plate 22 of the precast concrete block 2 so as to be inclined at a predetermined angle toward the lower part.

In this case, the soil nail anchor insertion hole (28) is further provided with an extension pipe coupling pipe (29) so that a part of the inside end portion protrudes to the inside of the precast concrete block (2).

An extension pipe 4 for inserting a soil nail anchor is further provided between the outer surface of the end portion of the pipe joint pipe 29 protruding inward of the precast concrete block 2 and the slope 1, A hole for attaching the soil nail anchor is formed in the ground of the slope 1 by inserting a file of the perforator through the extension tube coupling pipe 29 and the extension pipe 4 for insertion of the soil nail anchor, And a soil nail anchor (5) having a predetermined length can be inserted through an extension pipe (4) for inserting a soil nail anchor and a hole (11) for installing a soil nail anchor drilled in the ground.

A supporter fixing groove 231 is further formed in the rear part of the lower plate 23 of the precast concrete block 2 so that the block located at the lowermost end when stacking the blocks 2 in a staggered manner And the rear portion of the upper block except for the upper portion is supported by the supporter 6 vertically installed on the slope.

In the front part of the upper plate 21 of the precast concrete blocks 2, a dicing lug 211 for providing dirt and rockfall collecting / .

Meanwhile, in the method of constructing the retaining wall using the precast concrete block of the present invention,

A plurality of precast concrete blocks 2 molded so that the side end faces have a "C" shape in a state in which the block fixing means 26 or the block anti-skid means 27 are provided in the front portion of the incision slant surface 1 The pre-cast concrete blocks 2 integrally provided with the side plates 24 on the left side or the right side are provided on both sides of the slope 1, and furthermore, the respective interlayer blocks are arranged adjacent to each other in the transverse direction A step of staggering the blocks 2 in a manner that they are engaged with the blocks 2 located at the upper and lower portions of the blocks, respectively;

Supporting the supporters 6 in the vertical direction between the rear portion of the lower plate 23 of the upper layer and the slope 1 of the upper layer except for the block 2 located at the lowest position;

The cement concrete 3 is injected into the space portion formed between the block 2 and the slope 1 including the inner space portion of the blocks 2 through the cement concrete injection hole 25a formed in the upper plate 21 of each block 2. [ And a step of injecting cement concrete (3) into the blocks of the upper layer gradually, starting from the lower layer block.

Further, when a plurality of precast concrete blocks 2 are stacked in a multi-step manner in the front part of the incision slope 1,

Installing an extension pipe (4) for inserting a soil nail anchor between an outer surface and an oblique surface of an end portion of an extension pipe coupling pipe (29) protruding inward of the block (2);

Inserting a file of the perforator through the extension pipe coupling pipe 29 and the extension pipe 4 for inserting the soil nail anchor after the cement concrete 3 is cured to pierce the soil nail anchor installation hole 11 in the ground;

Inserting a soil nail anchor (5) having a predetermined length through the extension tube coupling pipe (29), an extension pipe (4) for inserting the soil nail anchor and a hole (11) for installing the soil nail anchor drilled in the ground .

1 to 11, the precast concrete block for the stepwise retention wall construction for slope reinforcement and quick construction of the present invention having the above construction and process will be described below.

First, a precast concrete block for slab reinforcement and quick construction for slope reinforcement and rapid construction applied to the present invention and a method for constructing retaining walls using the same, as shown in FIG. 10, have a multi- And a cement concrete (3) is laid without using a separate mold or the like in a space portion formed between the slope (1) including the inner space portion of the precast concrete blocks (2) and a concrete retaining wall It is the main technical component that can be constructed.

1, the pre-cast concrete block 2 of the present invention is formed in a rectangular shape without angles, and both side faces and the rear face are rolled, and the upper plate 21, the front plate 22 and the lower plate 23 ) Is formed integrally with a pre-cast concrete method so that the side cross-section has a "C" shape, and then transferred to the slope retaining wall piling site so that it can be used as a formwork for the retaining wall construction.

Therefore, the weight of the precast concrete blocks 2 can be minimized, so that the conveyance and the workability are very good. Further, after the precast concrete blocks 2 are stacked in a stepwise manner, Cement concrete 3 is cured by placing it in a space formed between the rear part of the precast concrete blocks 2 and the slope 1 including the part of the precast concrete block 2, Since the retaining structure is maintained by the concrete 3, the strength of the retaining wall itself is very strong.

In this case, the height, width and length of the precast concrete block 2 can be variously formed in accordance with the inclined shape of the slope and the like. Sculpted letters and the like in various forms and colors so as to be harmonized with the surrounding environment.

In the present invention, when the precast concrete blocks 2 are molded in a factory, cement concrete injection holes (not shown) are formed in front and rear portions of the upper plate 21 so as to have a predetermined diameter and a cap 25b is detachably coupled 25a.

Therefore, in the space portion formed between the rear portion of the precast concrete blocks 2 and the slope 1 including the inner space portion of the precast concrete blocks 2 stacked stepwise at the time of constructing the retaining wall, 3 is easily and fully injected through the cement concrete injection hole 25a from the outside of the precast concrete blocks 2 and then the cement concrete injection hole 25a is closed with the stopper 25b to form the cement concrete It is possible to greatly reduce the time, construction cost and labor cost due to the construction of the retaining wall for slope reinforcement using cement concrete and blocks, and also to greatly increase the strength of the retaining wall, It is possible to prevent the appearance of the precast concrete blocks from being damaged. In particular, it is possible to minimize the damage of the retaining wall for slope reinforcement La double construction can prevent and avoid such damage to the retaining wall by anchors or soil nailing.

In this case, when the plug 25b and the cement concrete injection hole 25a are simply formed into a round bar or a circular shape, the cement concrete injection hole 25a formed in the upper plate 21 of the precast concrete blocks 2, Even if the concrete 3 is injected into the space portion formed between the rear portion of the precast concrete blocks 2 and the slope 1 and the cement concrete injection hole 25a is blocked by the stopper 25b, There is a fear that the stopper 25b is released from the cement concrete injection hole 25a by the pressure of the cement concrete injection hole 25a.

Therefore, the cement concrete injection hole 25a is formed in two stages and formed not only a pair of engagement piece insertion holes 25a-1 in the periphery, but also a cylindrical stopper 25b, (25a-1), and then the block (2) is inserted into the block (2) when the block (2) is rotated using a tool. (25b-1) for preventing the detachment of the stopper (25b) by protruding from the upper surface of the upper plate (21) of the upper plate (21) and forming a tool engagement groove (25b-2) .

In the case of the precast concrete blocks 2 to be installed at both ends of the slope 1 among the precast concrete blocks 2 to which the present invention is applied, as shown in FIGS. 4A and 4B, The cement concrete 3 and the slope of the slope of the pre-cast concrete block 2, which have a state in which the cement concrete 3 and the slope of the slope of the slope have been blown off, are formed integrally with the side walls 24, It is possible to perfectly prevent the leakage of the water through the right and left end portions of the retaining wall itself and to maintain the appearance of the retaining wall itself beautifully.

When the precast concrete blocks 2 are installed in a stepped manner at the front part of the slope 1, they are installed successively in the horizontal direction at the ground surface of the slope front part as shown in FIG. 2, The cast concrete blocks 2 are stacked by a desired number of layers so as to have a stair shape so that they continue to be 2/3 or 1/2 or more to the rear portion. At this time, the upper part of the front concrete block 2 The precast concrete blocks 2 mounted on the left and right sides of the precast concrete blocks 2 are arranged in a staggered manner so as to engage with the left and right sides of the upper surface of the precast concrete blocks 2, 2) so that the upper surfaces of the upper and lower substrates 1 and 2 are half-ply).

If the bottoms of the precast concrete blocks 2, which are placed on top of the two precast concrete blocks 2 in the lower layer adjacent to each other in the transverse direction, are staggered in a zigzag manner, Since the bonding force between the upper, lower, left, and right precast concrete blocks 2 having a stacked structure is increased, a mutual flow can be prevented and a gap is generated between the blocks even if a subsequent ground change occurs And the like can be prevented.

In the present invention, block fixing means (26) or block blocking preventing means (27) are further provided on the rear portion of the upper plate (21) and the front portion of the lower plate (23) of the precast concrete blocks It is possible to prevent the blocks from being pushed forward by the soil pressure of the cement concrete 3 or the slope 1 and the like.

As shown in FIG. 1, the block fixing means 26 may be provided with various methods. For example, as shown in FIG. 1, the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2 A plurality of fixing pin insertion holes 261 are formed at predetermined intervals in the longitudinal direction on both sides.

In a state in which a plurality of fixing pin insertion holes 261 are formed at both sides of the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2 at predetermined intervals in the longitudinal direction, A plurality of fixing pin insertion holes 261 formed in the upper plate 21 and the lower plate 23 of the precast concrete blocks 2 positioned respectively at the upper and lower portions of the concrete blocks 2 in a multi- ) Of the upper and lower precast concrete blocks 2 are laminated in such a manner that the upper and lower precast concrete blocks 2 are aligned with each other in the upward and downward directions and then the fixing pin 262 having a bolt shape or the like is fitted to the fixing pin insertion hole 261 10, the precast concrete blocks 2 stacked up and down can be separated from each other by the fixing force of the fixing pin 262 fitted to the fixing pin insertion hole 261 Have a fixed form It is.

The block-slip prevention means 27 formed on the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2 may be provided in various forms. 2 to 5, a pair of retaining grooves 271 each having an arcuate or inverted trapezoidal shape in longitudinal section on both sides of the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2, And the engaging protrusion 272 are formed in the longitudinal direction.

A pair of the engagement grooves 271 and the engagement protrusions 272 are formed in the longitudinal direction on both sides of the rear portion of the upper plate 21 and the front portion of the lower plate 23 of the precast concrete blocks 2, When the block-slipping prevention means 27 is provided, when the precast concrete blocks 2 are stacked in a multi-step manner, the long blocks 23 formed on the lower plate 23 of the pre- 2 or 5 is inserted into a long arc-shaped or inverted trapezoidal engagement groove 271 formed in the upper plate 21 of the precast concrete block 2 in which the inverted trapezoidal-shaped locking projections 272 are disposed at the lower portion It is possible to prevent the precast concrete block 2 located at the upper portion from being pushed to the front portion from the upper surface of the precast concrete block 2 at the lower portion.

At this time, the block anti-skid means 27 is simply disposed on both sides of the rear portion of the upper plate 21 of the precast concrete blocks 2 and the front portion of the lower plate 23 with a pair of engagement grooves 271, The locking trough portion 272 of the precast concrete block 2 located at the upper portion coupled in a stepwise manner is inserted into the locking groove 271 of the precast concrete block 2 positioned at the lower portion, The precast concrete block 2 at the upper part may be pushed to some forward part when a strong earth pressure or the like is applied.

Therefore, in order to prevent this, the inner surface of the pair of the engagement grooves 271 formed in the longitudinal direction on both the rear portion of the upper plate 21 of the precast concrete blocks 2 and the front portion of the lower plate 23, (273) and (274) having a wavy shape as shown in Fig. 6 were further formed in the lateral direction on the outer surface of the base plate 272.

Therefore, when the precast concrete blocks 2 are stacked in a multi-step manner, the longitudinal stumbling portion 272 of the lower plate 23 of the precast concrete block 2 located at the upper portion is positioned in the lower portion of the precast concrete block 2) The concave and convex portions 273 and 274, which are inserted into the longitudinal direction locking grooves 271 of the upper plate 21 and formed in a wavy shape in the transverse direction, have a shape in which they are staggered from each other as shown in FIG. It is possible to prevent the precast concrete block 2 located at the front part from being completely pushed to the front part, thereby greatly improving safety and robustness against the retaining wall.

In the present invention, as shown in FIG. 6, the block-slipping prevention means 27 may be provided in a manner such that the rear portion of the upper plate 21 of the precast concrete blocks 2 and the rear portion of the front portion of the lower plate 23 Like concavo-convex portions 275 and 275 were formed.

The protrusions 275 and 276 having a wavy shape in the lateral direction on the outer surface of the front portion of the lower plate 23 and the rear portion of the upper plate 21 of the precast concrete blocks 2 are formed in this manner, When the precast concrete blocks 2 are stacked in a multistage manner in a state in which the anti-skid means 27 is provided, the precast concrete blocks 2, Since the precast concrete block 2 located at the upper part of the upper concrete block 276 and the uneven part 275 formed at the upper plate 21 of the lower precast concrete block 2 are staggered from each other as shown in FIG. It can be completely prevented from being pushed forward by the earth pressure or the like.

In the present invention, a soilless nail anchor insertion hole 28 having a predetermined diameter is formed in the center of the front plate 22 of the precast concrete blocks 2 at a predetermined angle (for example, 15 to 20 degrees) 1 and 10, an extension pipe coupling pipe 29 is provided in the soilless nail anchor insertion hole 28 so that a part of the inner end portion protrudes to the inside of the precast concrete block 2 gave.

Since the number and location of the soil nail anchor insertion hole 28 and the extension pipe coupling pipe 29 are determined differently depending on the volume of the precast concrete blocks 2 and the degree of softness of the slope ground, The location is not limited herein.

The precast concrete blocks 2 provided with the extension pipe coupling pipe 29 in the soilless nail anchor insertion hole 28 formed at the center of the front plate 22 are stacked in a multistage stepwise manner to construct a retaining wall on the slope 10, an extension pipe 4 for inserting a soil nail anchor is further installed between the outer surface of the end portion of the pipe joint pipe 29 projected inward of the precast concrete block 2 and the slope 1 Cement concrete 3 is injected into the space portion formed between the rear surface and slope of the bubbles as well as the inner space portion of the precast concrete blocks 2 to cure.

At this time, cement concrete (3) is inserted into the extension pipe (4) for inserting the soilless nail anchor which is installed between the outer surface of the end of the extension pipe coupling pipe (29) and the slope (1) It keeps the empty form without entering.

After curing of the cement concrete 3 through the above-described processes, the cement concrete 3 is cured at a predetermined angle from the front part of the precast concrete block 2 toward the lower part thereof, A file of a perforator (not shown) is inserted through the insertion tube 4 to insert the soil nail anchor attachment hole 11 in the ground of the slope 1.

A soilless nail anchor 5 having a predetermined length is inserted into the extension tube coupling pipe 29, an extension pipe 4 for inserting the soilless nail anchor and a hole 11 for installing a soilless nail anchor in the ground, An external force is applied to the soil nail anchor 5 which is exposed to the outside of the front plate 22 of the cast concrete blocks 2 and then the external end is fixed through various fixtures, You can do soil nailing method.

Soil Nailing Method is one of the ground reinforcement methods to stabilize by inserting stiffener into the soil. It inserts the stiffener at the closely spaced intervals without prestressing to increase the overall shear strength of the ground. It refers to the top-down type cut-to-ground reinforcement soil method that restrains the expected ground displacement after construction or after construction.

If the precast concrete blocks 2 are firmly fixed to the ground of the slope using the soil nail anchor 5, the friction between the ground and the soil nail anchor 5, the shear stress and the bending moment, Since the stability of the ground can be maintained, the safety and rigidity of the slope can be greatly improved through the strengthening of the retaining wall.

In the present invention, a supporter fixing groove 231 is formed in the rear portion of the lower plate 23 of the precast concrete block 2 so that the supporter 6 is fixed without being moved, , The rear portion of the block of the upper layer except for the block located at the lowermost end can be supported through the supporter 6 vertically installed on the slope as shown in Fig. 10, so that the concentrated load applied to the rear portion It is possible to prevent the blocks 2 from flowing or collapsing due to the movement of the blocks 2, thereby ensuring safety in the work.

In addition, in the present invention, when the precast concrete blocks 2 are formed, the dicing latches 211 are further protruded from the front portion of the upper plate 21 in the transverse direction to a predetermined height, It is possible to prevent the occurrence of safety accidents caused by falling slopes and falling rocks as well as to provide a vegetation space where various plants can be inhabited, Environmentally friendly and beautifully managed.

 As shown in FIG. 11, the retaining wall construction method using the precast concrete block according to the present invention is characterized in that the block fixing means 26, the block anti-skid means 27, and the like are mounted on the front portion of the incision surface 1, A plurality of pre-cast concrete blocks 2 are stacked in a multi-step manner so as to have a cross-sectional shape of a " C "shape in a state where they are provided, The precast concrete blocks 2 are integrally provided on both sides of the slope 1 on the left or right side of the slope 1, Install it.

The supporters 6 are vertically erected and supported between the rear portion of the lower block 23 of the upper block 2 and the slope 1 except for the block 2 located at the lowermost position, An extension pipe (4) for inserting a soilless nail anchor is provided between the outer surface and the slope of the end of the extension pipe coupling pipe (29) protruding inward of the block (2).

Thereafter, through the cement concrete injection holes 25a formed in the upper plate 21 of each block 2, the cement concrete (or the cement concrete) is injected into the space portion formed between the block 2 and the slope 1, 3) is laid, starting from the lower layer block, the cement concrete (3) is gradually injected into the blocks in the upper layer.

The cement concrete injection holes 25a of the cement concrete injection holes 25a formed in the front and rear portions of the upper plate 21 of the blocks 2 are connected to the lower plate 23 of the upper block 2 However, it is preferable that the cement concrete injection hole 25a formed at the front part is provided with a stopper 25b to prevent the cement concrete from flowing out.

When the extension tube 4 for injecting the soil nail anchor is provided between the outer surface and the slope of the end portion of the extension tube coupling pipe 29 protruding to the inside of the block 2 as described above, The cement concrete 3 is poured into a space formed between the inclined surface 1 and the inclined surface 1 including the inner space portion of the blocks 2 through the extension pipe coupling pipe 29a ) And the extension pipe (4) for inserting the soilless nail anchor, the hole (11) for installing the soilless nail anchor is inserted into the ground.

Then, when the soil nail anchor 5 having a predetermined length is inserted through the extension tube coupling pipe 29, the extension pipe 4 for inserting the soil nail anchor and the hole 11 for installing the soil nail anchor drilled in the ground, The construction of the retaining wall of the slope using the applied precast concrete blocks is completed.

Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Which will be apparent to those skilled in the art.

1: Slope 11: Sole nail Anchor mounting hole
2: Precast concrete block
21: upper plate 211: hanging jaw for dies
22: front plate 23: bottom plate
231: supporter fixing groove 24: side plate
25a: Cement concrete injection hole 25a-1:
25b: Stopper 25b-1:
25b-2: tool engaging groove 26: block fixing means
261: Fixing pin insertion hole 262: Fixing pin
27: Blocking prevention means
271: Retaining groove 272:
273, 274, 275, and 276:
28: Soil nail anchor insertion hole 29: Extension tube coupling tube
3: Cement concrete
4: Extension tube for insertion of nail anchor
5: Soil nail anchor
6: Supporters

Claims (13)

In constructing the precast concrete block for slope reinforcement in a multi-stage stepped manner at the front part of incision slope and for the stepped-type retaining wall construction for rapid construction,
The precast concrete block is formed so that both side faces and the rear face are rolled so that only the upper plate, the front plate and the lower plate are integrally formed so that the side end face has a " A cement concrete injection hole into which a cap is detachably coupled to inject a cement concrete into a space formed between the slope and the slope, and a left side or right side of the precast concrete blocks installed on both sides of the slope Wherein the pre-cast concrete blocks are integrally formed with a side plate for preventing leakage of the cement concrete and the gravel. When the pre-cast concrete blocks are installed in a stepwise manner in the front part of the slope, It is characterized by a zig-zag arrangement in which each block is located at the bottom of each block. Slope reinforcement and the rapid terraced retaining wall construction precast concrete blocks for the construction of.
The method according to claim 1,
Wherein the blocks of the precast concrete blocks are further provided with block fastening means or block skidding preventing means to prevent the respective blocks from being pushed by the earth pressure of the cement concrete or slope on both sides of the upper plate rear portion and the lower plate front portion of the precast concrete blocks. Precast concrete blocks for cascading retaining walls for reinforcement and rapid construction.
The method of claim 2,
Wherein the block fixing means comprises:
A plurality of fixing pin insertion holes are formed at both sides of the upper plate rear part and the lower plate front part of the precast concrete blocks at predetermined intervals in the longitudinal direction so that the precast concrete blocks are stacked in a multi- A plurality of fixing pin insertion holes formed in the upper plate and the lower plate of the positioned precast concrete blocks are fixedly inserted into fixing pin insertion holes which are aligned with each other in the upward and downward directions, Precast concrete block for slope reinforcement and cascade retaining wall construction for rapid construction.
The method of claim 2,
Wherein the block-
A pair of latching grooves and an engaging hole portion having longitudinal or transverse trapezoidal shapes in longitudinal cross section are formed longitudinally on both sides of the top plate rear portion and the bottom plate front portion of the precast concrete blocks to stack the precast concrete blocks in a stepped manner Wherein a protrusion of the lower plate of the precast concrete block positioned at the upper part is inserted into a retaining groove of the upper plate of the precast concrete block located at the lower part of the precast concrete block, the precast concrete block for laying a stepped reinforcement for slope reinforcement and rapid construction.
The method of claim 4,
A pair of engaging groove inner surfaces formed in the longitudinal direction on both sides of the upper plate rear portion and the lower plate front portion of the precast concrete blocks, and wavy concavo-convex portions laterally in the outer surface of the engaging trough portion, The longitudinal stumbling block of the lower plate of the precast concrete block located at the upper portion is inserted into the longitudinal grooves of the upper plate of the precast concrete block positioned at the lower portion and the concave portions formed in a transverse direction are staggered Wherein the precast concrete block is located at the upper part of the concrete block, so that the precast concrete block located at the upper part is prevented from being pushed toward the front part of the precast concrete block.
The method of claim 2,
Wherein the block-
Wherein the precast concrete blocks are formed by forming a wavy concavo-convex portion in the lateral direction in the rear portion of the upper plate and the outer surface of the lower plate front portion of the precast concrete blocks, and when the precast concrete blocks are stacked in a multi- The precast concrete block located at the lower part and the upper plate uneven part of the precast concrete block are staggered from each other so that the precast concrete block located at the upper part is prevented from being pushed to the front part. Cast concrete blocks.
The method according to claim 1,
And a soil nail anchor insertion hole is further formed on the front plate of the precast concrete blocks so as to be inclined at a predetermined angle toward a lower portion of the precast concrete block.
The method of claim 7,
Wherein the soil nail anchor insertion hole is further provided with an extension tube coupling pipe so that a part of an inner end portion thereof protrudes to the inside of the precast concrete block.
The method of claim 8,
And an extension pipe for inserting a soil nail anchor is further provided between the outer surface and the slope of the end of the pipe joint pipe protruding to the inside of the precast concrete block. After cement concrete curing, A hole for attaching the soil nail anchor to the ground is inserted, and then a soil nail anchor having a predetermined length is inserted through the extension pipe coupling tube and the extension pipe for insertion of the soil nail anchor and the hole for installing the soil nail anchor in the ground. Precast concrete block for cascade retaining wall construction for slope reinforcement and rapid construction.
The method according to claim 1,
A supporter fixing groove is further formed in a rear portion of the lower plate of the precast concrete block so that when the blocks are stacked in a staggered manner over the water layer, the rear portion of the upper block except for the block located at the lowermost portion is vertically erected on the slope The present invention relates to a precast concrete block for cascade retaining wall construction for slope reinforcement and rapid construction.
The method according to claim 1,
Wherein the pre-cast concrete blocks are further formed with protruding hooks for dyke at a predetermined height in the transverse direction at the front part of the upper plate to provide dirt and rockfall collecting and planting habitat spaces. Precast concrete block for cascade retaining wall construction.
A plurality of precast concrete blocks formed so as to have a " C "shape in a side end face in a state of having a block fixing means or a block-slip prevention means at a front portion of a incision slope are stacked in a multi- The pre-cast concrete blocks integrally provided with the side plates integrally on the left side or the right side are provided. In addition, the inter-layer blocks are engaged with the blocks located on the upper and lower sides of the adjacent blocks in the transverse direction, Installing;
Supporting the supporters in a vertical direction between a rear portion and a slope of a lower block of the upper layer except the block located at the lowermost end;
The cement concrete is injected into the space formed between the slope including the inner space portion of the blocks through the cement concrete injection hole formed in the upper plate of each block, The method of claim 1, wherein the pre-cast concrete block is formed of a concrete block.
The method of claim 12,
When a plurality of precast concrete blocks are stacked in a multi-step manner on the front portion of the incision slope,
Providing an extension pipe for inserting a soil nail anchor between an outer surface and an inclined surface of an end portion of an extension tube coupling pipe protruding inward of the block;
A step of drilling a hole for installing a soil nail anchor on the ground by inserting a file of the perforator through the extension pipe coupling pipe and the extension pipe for inserting the soil nail anchor after cement concrete curing;
A step of inserting a soilless nail anchor having a predetermined length through the extension pipe coupling pipe and the extension pipe for inserting the soil nail anchor and the hole for installing the soil nail anchor drilled in the ground. Retaining wall construction method using precast concrete block for cascade retaining wall construction.

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