KR102066731B1 - Method for building retaining wall - Google Patents

Abstract

The present invention relates to a method for installing a retaining wall. According to an aspect of the present invention, the method for installing the retaining wall uses, as an instrument for piling up a plurality of precast panels on a front side of a cut surface of a slope surface to create a front surface unit of the retaining wall, and injecting soil into a rear surface side of the precast panels, thereby installing the retaining wall, a panel fastening means with a front surface unit in a polygonal shape to be hung and supported by a reinforcing rebar built in the panels to prevent the panels from being dislodged. The panel fastening means has a status being exposed from the center of a panel rear surface unit towards a rear side, and includes: a precast panel installed with a front surface unit facing a front side of the cut surface of the slope surface; a rod material for connection, in which one end unit is fastened with the panel fastening means of the precast panel, and the other end unit is extended towards the cut surface of the slope surface; a rod material for the basis, fixed on a hole punched on the cut surface of the slope surface by grouting, in which one end unit is exposed to the outside of the hole; and a coupler in which a first fastening means, fastened with the other end unit of the rod material for connection, and a second fastening means, fastened with one end unit of the rod material for the basis, are formed as one body, thereby connecting the rod material for connection and the rod material for the basis to each other. Disclosed is the method for installing the retaining wall using the instrument for installing the retaining wall, configured to prevent a transverse movement by receiving a support force from the rod material for the basis, with the precast panels fixed on the cut surface of the slope surface.

Description

Retaining wall installation method {Method for building retaining wall}

The present invention relates to a method for installing a retaining wall, wherein a precast panel is formed by accumulating a precast panel to form a front part of the retaining wall, and a precast panel for forming the front part of the retaining wall by using a basic reinforcing rod installed by drilling a cut surface. It is related with the retaining wall installation method which improved the workability of a retaining wall, safety, and aesthetics by making it firmly supported.

Retaining wall is a structure made to prevent the ground collapse when the stable slope of the surface ground is steeper than that. It is a wall that prevents soil from collapsing by resisting soil pressure. Says 體).

A number of prior arts for installing retaining walls using concrete blocks or panels have been proposed.

For example, Korean Patent Registration No. 10-1378793 (registered on March 21, 2014) relates to a cut panel retaining wall having a screw-assembled finishing cap, wherein a plate-cup made of metal is inserted into a fastening groove of the panel retaining wall to which the closing cap is coupled. A panel retaining wall has been proposed to be integrally cured and formed to be secured by simple nut coupling.

In another example, the Republic of Korea Patent Registration 10-0927206 (registered November 10, 2009) relates to the reinforcement retaining wall and the construction method using a variable pressure plate corresponding to the installation interval of the ground reinforcement, to build a reinforcement retaining wall, anchors, etc. In order to adjust the height or width in the vertical or horizontal direction according to the location where the ground reinforcement is installed on the ground, the variable pressure plate is constructed by using a plurality of segments so that the appearance does not change, and the variable pressure plate is repeatedly installed. We proposed a construction to build a reinforced retaining wall.

As another example, the Republic of Korea Patent Registration 10-1694652 (January 03, 2017) relates to the anchor head removable protective cover for the panel cut section retaining wall, and the anchor head exposed to the outside during the construction of the panel cut section retaining wall In order to protect the anchor head cap and to distribute the concentrated stress evenly, a circular pressure plate was formed to maintain the structural safety of the concrete panel.

In another example, Korean Patent No. 10-1622190 (registered May 12, 2016) relates to a stone pattern panel, a retaining wall using the same, and a construction method thereof, comprising: a body formed of concrete; A surface layer formed of colored concrete on the front surface of the main body so that a stone pattern is formed on the surface; In order to prevent the surface layer from being separated, the main body and the surface reinforcing layer jointly coupled to the surface layer; proposed a stone pattern panel comprising a.

However, the proposed prior arts expose the installation portion of the bolt-shaped rod-shaped member (fixed nail) for fixing the retaining wall to the front part of the panel member constituting the retaining wall, and a separate cover member to cover it on the front part side. Since it is a method of attaching the (finish cap), the aesthetics of the panel exposed on the front of the retaining wall is not neat, there was an inconvenience that requires a separate post-process work to install the cover member.

In addition, the prior art has the limitation that the rainwater or moisture can penetrate through the gap between the cover member and the panel body can easily corrode the steel, which can reduce the durability of the panel in the long-term use. .

Republic of Korea Patent Registration 10-1378793 (registered March 21, 2014) Republic of Korea Patent Registration 10-0927206 (November 10, 2009 registration) Republic of Korea Patent Registration 10-1694652 (January 03, 2017 registration) Republic of Korea Patent Registration 10-1622190 (registered May 12, 2016)

The present invention has been made in view of the above problems, and the front part of the retaining wall is formed by stacking the precast panel, and the front part of the retaining wall is formed by using a basic reinforcing rod which is installed by drilling a cut surface. It is an object of the present invention to provide a retaining wall installation method in which the precast panel is firmly supported, thereby improving the workability, safety, and aesthetics of the retaining wall.

According to one aspect of the present invention, a plurality of precast panels are placed on the front side of the cut surface to form the front part of the retaining wall, and the earth is put into the rear side of the precast panel to install the retaining wall. An apparatus comprising: a polygonal front face shape, the panel fastening means being latched and supported by the reinforcing bars in the panel so as not to be separated out of the panel, wherein the panel fastening means is exposed only to the rear side from the center of the rear face of the panel; A precast panel having an insulated state and installed in a state in which the front part faces the front side of the cut surface; A connecting rod having one end fastened to the panel fastening means of the precast panel and the other end extending in the direction of the cut surface of the surface; A base rod that is fixed by grouting to a hole punched in a front cut surface and whose one end is exposed to the outside of the hole; A first coupler coupled to the other end of the connecting rod and a second coupler coupled to one end of the base rod are integrally formed to couple the connecting rod and the base rod to each other; The precast panel is configured to receive a supporting force from the base bar fixed to the front cut surface to prevent lateral movement. The precast panel has a polygonal front shape and has a predetermined thickness. And a panel fastening means formed integrally with a locking part held by a reinforcing steel bar provided at a rear side of the panel body and a nut part exposed toward the rear side from a center side of the rear surface of the panel body, and horizontally or At least one internally installed on the rear side of the reinforcing bar at an angle not equal to the rebar in the longitudinal direction; And a skeletal reinforcement on the upper surface, wherein the panel fastening means is latched and supported so as not to be separated from the outside by the support force transmitted from the base rod through the locking portion, and the one end of the connecting rod is fastened to the panel fastening means. Silver, one end of the connecting rod formed with a bolt is screwed with the nut portion, wherein the first fastening means and the second fastening means of the coupler each comprises a through-nut part, the through type of the first fastening means The central axis of the nut part and the central axis of the through nut part of the second fastening means are integrally formed with each other at an inclination angle, and bolts are formed at the other end of the connecting rod and the one end of the base bar, respectively. The through nut part of the first fastening means of the coupler or the through nut part of the second fastening means are respectively fastened, the other end and the The second fastening of the coupler to one end of the base rod in the state that the first fastening means of the coupler is screwed to the other end of the connecting rod, the screw is coupled to each other in a form that can pass through the additional through-type nut. When the coupler is rotated to screw the means, the coupler is moved backward in the screwing process with the base rod, and the connecting rod and the precast panel fastened to the first fastening means of the coupler. A retaining wall mounting mechanism is disclosed, which is configured to move rearward.

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According to another aspect of the present invention, a method for installing a retaining wall using the retaining wall installation mechanism, the method comprising: 1) excavating a surface to form a cut surface; 2) drilling holes in the cut surface; 3) inserting the base rod into the perforated hole and fixing it by grouting, fixing one end of the base rod to be exposed to the outside of the hole; 4) placing the precast panel on the front part of the cut surface so that the front part faces the front side of the front cut surface, and fastening the connecting rod to the panel fastening means provided in the precast panel; 5) interconnecting the connecting rod and the base rod using a coupler; And 6) injecting soil into the rear space of the precast panel in the stacked state to perform backfilling and compaction. The retaining wall installation method is disclosed.

According to another aspect of the present invention, a method for installing a retaining wall using the retaining wall installation mechanism, the method comprising: 1) excavating a surface to form a cut surface; 2) drilling a plurality of holes in the cutting surface at regular intervals along the longitudinal and transverse directions; 3) inserting a base rod into each perforated hole and fixing it with grouting, wherein one end of the base rod is fixed to be exposed out of the hole; 4) A plurality of precast panels are placed in contact with each other along the up, down, left and right directions on the front of the cutting surface such that the front portion faces the front side of the front cut surface, and the panel fastening means provided in each precast panel Fastening respective connecting rods; 5) interconnecting each connecting rod and the base rod using a coupler; And 6) backfilling and compacting the soil by putting soil into the rear spaces of the plurality of precast panels in the stacked state.

Such a present invention is carried out so that the precast panel is stacked to form the front part of the retaining wall, and the precast panel forming the front part of the retaining wall is firmly supported using a basic reinforcing rod which is installed by puncturing the front cutout. This improves the workability, safety, and aesthetics of the retaining wall.

In particular, in the present invention, since the installation portion of the connecting rod is not exposed to the front side of the panel, a separate cover member is unnecessary, so that the aesthetics of the panel on the front of the retaining wall can be neatly finished, and a separate post-process work for installing the cover member. This has the advantage of being unnecessary.

In addition, since the present invention has no gap in which rainwater or moisture can penetrate through the front part of the precast panel, corrosion of reinforcing steel or skeletal steel is prevented, and durability of the retaining wall does not decrease even during long-term use. .

1 is a schematic diagram of an installation state of the retaining wall installation mechanism according to an embodiment of the present invention,
2 is a block diagram of a retaining wall panel according to an embodiment of the present invention,
3 is an enlarged view of a panel fastening means portion of the retaining wall panel according to an embodiment of the present invention;
Figure 4 is a rear perspective view of the retaining wall panel according to an embodiment of the present invention,
5 is an enlarged view of a portion of the upper and lower panels of the retaining wall mounting mechanism according to one embodiment of the present invention;
6 is a partially enlarged view of a lower portion of the retaining wall of the retaining wall installation mechanism according to the embodiment of the present invention;
Figure 7 is an excerpt configuration of the coupler portion of the retaining wall installation mechanism according to an embodiment of the present invention,
8 is a schematic front view showing a state in which a plurality of retaining wall panels are stacked using a retaining wall installation mechanism according to an embodiment of the present invention;
9 is a perspective view of a bar according to another embodiment of the present invention,
10 to 15 is a schematic diagram for explaining a retaining wall installation method according to an embodiment of the present invention.

The present invention can be embodied in many other forms without departing from the spirit or main features thereof. Therefore, the embodiments of the present invention are merely examples in all respects and should not be interpreted limitedly.

The terms first, second, etc. are used only for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it may be directly connected or connected to that other component, but there may be other components in between.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In the present application, the terms "comprise", "comprise", "have" and the like are intended to express the presence of a component described in the specification or a combination thereof, and indicate the possibility that another component or feature is present or added. It is not excluded in advance.

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

1 is a schematic view of the installation state of the retaining wall installation mechanism according to an embodiment of the present invention, Figure 2 is a block diagram of a retaining wall panel according to an embodiment of the present invention, Figure 3 is a retaining wall according to an embodiment of the present invention 4 is an enlarged view of a rear panel of the retaining wall panel according to an embodiment of the present invention, and FIG. 7 is an excerpt configuration of a coupler portion of the retaining wall installation mechanism according to an embodiment of the present invention. It is also.

In the retaining wall mounting mechanism of the present embodiment, a plurality of precast panels 100 are placed on the front side of the front cut surface 12 to form a front portion of the retaining wall, and on the rear side of the precast panel 100. It is a mechanism for installing the retaining wall by injecting soil (S).

The retaining wall mounting mechanism of the present embodiment includes a precast panel 100, a connecting rod 30, a base rod 40, and a coupler 50.

Precast refers to preforming concrete blocks or slabs in the factory, and PC piles and RC piles are generally manufactured in a precast manner. The retaining wall mounting mechanism of the present embodiment configures the retaining wall panel as a precast panel.

The precast panel 100 has a polygonal front face shape and includes a panel fastening means 110 that is latched and supported so as not to be separated out of the panel by the reinforcing bars 152 installed in the panel.

The panel fastening means 110 has a state exposed toward the rear from the center side of the rear panel 100 ", the front portion 100 'is installed with the front side of the front surface cut surface 12. Preferably, the panel fastening means 110 has a state exposed only toward the rear of the panel, thereby improving the aesthetics of the front panel portion, and the rear surface of the precast panel 100 is perpendicular to the connecting rod 30. The engagement in the direction is advantageous for maximizing the resistance to earth pressure.

One end of the connecting rod 30 is fastened to the panel fastening means 110 of the precast panel 100, and the other end thereof extends in the direction of the cut surface of the surface 12. For example, the connecting rod 30 may be a conventional rebar rod or screw-shaped rebar rod having a diameter of 25 mm.

The base bar 40 is fixed by a grouting 16 to a hole 14 drilled in the front cut surface 12, and one end thereof is exposed to the outside of the hole 14. For example, the base rod 40 may be a conventional rebar rod or screw-shaped rebar rod having a diameter of 25 mm. The hole 104 may be formed to have an inner diameter of 75 mm, for example. Spacers (not shown) may be inserted in the middle of the base bar 40 to maintain a gap with the inner surface of the hole 104.

The coupler 50 includes a first fastening means 53 fastened to the other end of the connecting rod 30 and a second fastening means 54 fastened to one end of the base bar 40. Is formed to connect the connecting rod 30 and the base rod 40 to each other. Coupler 50 may be made of a metal material.

The retaining wall mounting mechanism of this embodiment is configured such that the precast panel 100 receives the supporting force from the base bar 40 fixed to the cut surface 12 to prevent lateral movement.

The detailed configuration of the components will be described.

The precast panel 100 includes panel bodies 100a-100e, panel fastening means 110, reinforcing bars 152, and one or more skeletal bars 160.

The panel bodies 100a to 100e have a polygonal front face shape and have a predetermined thickness.

The panel main bodies 100a to 100e include a rectangular main body portion 100a, left and right extension portions 100b and 100c formed in a rectangular shape to the left and right sides of the rectangular main body portion 100a, and the rectangular main body portion. And upper and lower expansion portions 100d and 100e, which are formed to extend in a rectangle to the upper side and the lower side of 100a.

In the panel main bodies 100a to 100e, connecting rod through holes 132 are formed in the vertical direction in the left and right expansion parts 100b and 100c, respectively. In addition, the panel main body (100a ~ 100e) may be provided with an installation ring 134 in the upper expansion portion (100d).

The panel fastening means 110 has a locking portion 112 held by the reinforcing bars 152 installed in the panel bodies 100a to 100e and a central side of the rear surface portion 100 ″ of the panel bodies 100a to 100e. In the nut portion 114 is exposed toward the rear is formed integrally.

One end of the connecting rod 30 and the panel fastening means 110 is fastened to one end of the connecting rod 30 having the bolt portion 30a by screwing the nut 114. .

The one or more skeletal reinforcement 160 is embedded in the panel body 100a to 100e in the horizontal direction or the vertical direction. The skeletal reinforcement 160 may include a transverse skeletal reinforcement 162 and a longitudinal skeletal reinforcement 164.

In more detail, the reinforcing bar 152 is installed on the rear side of the panel fastening means 110 to support the locking portion 112.

In FIG. 3, a locking portion 112 is formed at an upper side and a lower side of the panel fastening means 110, respectively, and illustrates a case where the locking portion 112 is held at the upper side and the lower side by two reinforcing bars 152 arranged in the transverse direction. . As another example, at the left and the right side by two further reinforcing bars (reference numeral 152a of FIG. 2) formed in the longitudinal direction and additionally engaging parts (not shown) are formed at the left and right sides of the panel fastening means 110. In addition, each may be latched. The upper and lower locking portions 112 on which the reinforcing bars 152 in the transverse direction are supported and the left and right locking units (not shown) on which the reinforcing bars in the longitudinal direction (symbol 152a in FIG. 2) are supported are supported. The position in the front and rear directions may be different so that interference does not occur.

As another example, when the reinforcing bar corresponding to the reference sign 152a of FIG. 2 is configured to provide a support function for the reinforcing bar 152 without being caught in the engaging portion of the panel fastening means 110, the reinforcing bar of the reference sign 152a is reinforced. It will function as skeletal reinforcing bars 164a rather than reinforcing bars.

Preferably, the skeletal reinforcing bars 164 are installed on the rear side of the reinforcing bar 152 at an angle not equal to that of the reinforcing bar 152 to be configured to support the reinforcing bar 152. Referring to FIG. 2, the reinforcing bars 152 are installed in the horizontal direction, and the vertical skeletal reinforcing bars 164 are installed at different angles to support the reinforcing bars 152. Preferably, the reinforcing bar 152 uses a steel bar having a diameter of 10% or more thicker than the diameter of the skeletal bar 160.

Through this configuration, the panel fastening means 110 is supported by the locking portion 112 so as not to be separated out of the panel by the support force transmitted from the panel rear side, the rear panel through the nut portion 114 It is fastened to the connecting rod 30 located on the side.

On the other hand, the upper edge of the upper extension (100d) and the upper edge of the left and right extensions (100b, 100c) has a stepped structure in which the front bottom portion (100d ') is located above the rear bottom portion (100d "), respectively. It is formed to have.

In addition, lower edges of the lower extension part 100e and the left and right extension parts 100b and 100c are formed to have a stepped structure in which the front ceiling part 100e 'is located higher than the rear ceiling part 100e ", respectively. do.

In addition, the side edges of the left and right extensions 100b and 100c have a stepped shape in which the rear portions 100b "and 100c" protrude outward from the front portions 100b 'and 100c'.

In addition, the side edges of each of the upper extension part 100d and the lower extension part 100e have a stepped shape in which a rear part (not shown) protrudes outward from the front part (not shown).

As described later, through the stepped structure, when the plurality of precast panels 100 are stacked, the adjacent precast panels 100 may be firmly engaged with each other.

On the other hand, the first fastening means 53 and the second fastening means 54 of the coupler 50 each include a through nut 52.

Further, the center axis A30 of the through nut part 52 of the first fastening means 53 and the center axis A40 of the through nut part 52 of the second fastening means 54 are inclined with each other. It is formed integrally with the state (a). The inclination angle (a) may be understood as the inclination angle (a) seen in a state in which the coupler 50 is projected in a planar view as shown in FIG. 1.

Preferably, the inclination angle (a) may be in the range of 0 to 15 degrees.

When the inclination angle a is 0 degrees, the center axis A30 of the through nut part 52 of the first fastening means 53 and the through nut part 52 of the second fastening means 54 are substantially reduced. It can be seen that the center axis A40 is horizontal (or parallel). When the inclination angle (a) is 0 degrees, there is an advantage in that it is easy to fasten the connecting bar 30 or the base bar 40 to the coupler 50 while rotating (rotating) the coupler 50.

When the inclination angle (a) is greater than 0 degrees, since the base rod 40 is installed in a downwardly inclined state based on a state in which the connecting rod 30 is horizontally disposed, the base rod 40 is inserted. The hole 104 of the cut-out surface 102 is also drilled in the downward inclined direction, so that the base rod 40 is inserted into the drilled hole 104 and the grouting 106 is easily injected. The advantage is that it can be done. In view of this, the coupler 50 having an appropriate inclination angle a may be provided in consideration of the shape of the cutting surface and the working environment.

The inclination angle a of the coupler 50 defines a connection angle at which the connecting bar 30 and the base bar 40 are connected to each other.

Bolting parts 30a and 40a are formed at the other end of the connecting bar 30 and the one end of the base bar 40, respectively, and the through nuts of the first fastening means 53 of the coupler 50 are formed. The through-type nut part 52 of the part 52 or the second fastening means 54 is respectively fastened.

For example, in a state where the first fastening means 53 of the coupler 50 is screwed to the other end of the connecting bar 30, the second of the coupler 50 is connected to one end of the base bar 40. Rotating (rotating) the coupler 50 to screw the fastening means 54, the coupler 50 is moved to the rear (cutting surface direction) during the screwing process with the base bar 40, the coupler ( The connecting rod 30 fastened to the first fastening means 53 of 50 and the precast panel 100 coupled thereto are also moved rearward.

When the above-mentioned coupling method is taken while the soil space S is partially filled in the rear space of the precast panel 100, the soil filled in the rear surface of the precast panel 100 is pressed toward the cutting surface, thereby naturally reducing the soil. There is an advantage to get.

8 is a schematic front view showing a state in which a plurality of retaining wall panels are stacked using a retaining wall mounting mechanism according to an embodiment of the present invention.

As shown in FIG. 8, in order to accumulate the plurality of precast panels 100, the right extension part 100c and the second extension part 100c of the first precast panel 100-1 constituting the lower layer. The lower extension part 100e of the third precast panel 100-3 constituting the upper layer is disposed between the left extension part 100b of the precast panel 100-2 so that the respective edges are connected to each other. do.

In addition, a left extension part 100b of the third precast panel 100-3 is connected to the right edge of the upper extension part 100d of the first precast panel 100-1.

In addition, the right extension part 100c of the third precast panel 100-3 is connected to the left edge of the upper extension part 100d of the second precast panel 100-2.

When the plurality of precast panels 100 are stacked, a third precast is formed on the upper part of the connecting rod through hole 132 of the right extension part 100c of the first precast panel 100-1. The connecting rod through-holes 132 of the left extension part 100b of the panel 100-3 are disposed to communicate with each other, and the connecting rods 192 are inserted to be integrally coupled to each other.

In addition, the connecting rod of the right extension part 100c of the third precast panel 100-3 on the connecting rod through hole 132 of the left extension part 100b of the second precast panel 100-2. The through holes 132 are arranged to communicate with each other to insert the connecting rod 192 to be integrally coupled to form a coupling state between the panels.

The connecting rod 192 may be a hot-dip galvanized round bar, and the connecting rod through hole 132 may be a PVC pipe. The connecting rod 192 may have a length longer than that of the connecting rod through hole 132 of one panel.

9 is a perspective view of a bar according to another embodiment of the present invention.

In the above embodiment, the bolts 30a and 40a were directly formed on the connecting rod 30 and the base rod 40, respectively. As another example, the retaining wall mounting mechanism of the present embodiment may be configured by using ordinary reinforcing bars in which no bolt portion is formed.

In the case of the general reinforcing bar 30 ', the bolt part is not formed, and the convex part 30a' and the concave part 30b 'are formed on the surface in consideration of installation and handling convenience and strength aspects. When the bolt cover 60 of the form shown on the outside of the general reinforcing bar 30 'is combined, the general reinforcing bar 30' may be used as a rod formed with a bolt.

The bolt cover 60 has a convex portion and a concave portion engaged with the convex portion 30a 'and the concave portion 30b' of the general reinforcing bar 30 ', respectively, and a bolt thread is formed on the outer surface thereof.

In addition, the bolt cover 60 may be separated into an upper cover 60a and a lower cover 60b and screwed onto the nut part in a state in which the bolt cover 60 is wrapped around the general reinforcing bar 30 '.

Fig. 5 is an enlarged view of the stacked portion of the upper and lower panels of the retaining wall mounting mechanism according to the embodiment of the present invention.

Retaining wall mounting mechanism according to an embodiment of the present invention may install a filler 312 in the upper and lower gaps between the panels in order to maintain a proper distance between the upper and lower panels and to block vibration transmission between the panels after compaction or installation. Filler 312 may be made of cork material.

6 is a partially enlarged view of a lower portion of the retaining wall of the retaining wall mounting mechanism according to the embodiment of the present invention.

The retaining wall mounting mechanism according to the embodiment of the present invention may install the base reinforcement 200 made of precast concrete on the ground, which is the lowest layer, in order to deposit the plurality of precast panels 100.

Basic reinforcement 200 is a skeleton reinforcement (200a) is built to maintain rigidity, the vertical support rod 222 is installed through the vertical hole (200b). The vertical support rod 222 is vertically inserted into a hole drilled in the ground so that the foundation reinforcement 200 is firmly installed on the ground.

The precast panel 100 may be stacked on the foundation reinforcement 200, and the filler 312 may be installed in the gap therebetween.

The retaining wall installation method using the retaining wall mounting mechanism of the present embodiment will be described.

10 to 15 is a schematic diagram for explaining a retaining wall installation method according to an embodiment of the present invention. For convenience, a process of installing a single layer precast panel will be described.

In step 1), the normal surface 10 is excavated to form the cut surface 12.

The excavation work is generally carried out in steps of 3 to 4.5 m, taking into account the rear working space on the planned retaining wall line.

In step 2), the hole 14 is drilled in the cutting surface 12.

Drill the position selected by the drilling position measurement while maintaining the angle of 0 ~ 20 degrees with a crawler drill. The hole 14 'in the vertical direction may be drilled for the construction of the lower retaining wall.

In step 3), the base rod 40 is inserted into the perforated hole 14 and fixed with the grouting 16. At this time, one end of the base rod 40 is fixed to be exposed to the outside of the hole (14).

The grouting 106 may be cement milk grouting from the tip using a grouting hose.

In the step 4), the precast panel 100 is placed in the front portion of the cutting surface 12 so that the front portion 100 'faces the front side of the front cutting surface 12, and the precast panel 100 is placed. Fastening the connecting rod (30) to the panel fastening means (110) provided in the).

In order to install the precast panel 100, the foundation reinforcement 200 may be installed on the ground or the foundation concrete may be poured and cured. The accumulation of the upper and lower precast panels 100 may be performed in the manner illustrated in FIG. 5.

In step 5), the connecting rod 30 and the base rod 40 are interconnected using the coupler 50.

The non-woven fabric 302 may be installed on the rear surface of the precast panel 100 to prevent leakage of soil, moisture, or the like.

In step 6), the earth and sand (S) is put into the rear space of the precast panel 100 in the stacked state to perform the backfilling and compacting process.

When filling the soil, it is possible to use a cotton picker, rollers, and rams to compact.

Meanwhile, as illustrated in FIGS. 1 and 8, the retaining wall installation method of this embodiment forms a retaining wall by stacking precast panels in multiple layers. A process of laminating a precast panel in multiple layers will be described.

In step 1), the cut surface is excavated to form the cut surface 12.

In the step 2), the plurality of holes 14 are drilled in the cutting surface 12 at regular intervals along the longitudinal direction and the transverse direction.

In step 3), insert the base bar 40 into each perforated hole 14 and fix it with grouting 16, so that one end of the base bar 40 is exposed outside the hole 14. Fix it.

In the step 4), the plurality of precast panels 100 are positioned along the front and rear sides of the cutting surface 12 such that the front portion 100 'faces the front side of the front surface cutting surface 12 along the vertical and horizontal directions. It connects and accumulates, and fastens each connecting rod 30 to the panel fastening means with which each precast panel 100 was equipped.

In step 5), each of the connecting rods 30 and the base rods 40 are interconnected using the coupler 50.

In step 6), the earth and sand (S) is put into the rear space of the plurality of precast panel 100 in the stacked state to perform the back filling and compaction process.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many different and obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

12: cut face
14: hole
16: grouting
30: Connecting rod
40: bar for foundation
30a, 40a: bolt portion
50: coupler
52: nut part
53: first fastening means
54: second fastening means
100: precast panel
110: panel fastening means
100a: rectangular main body
100b, 100c: left and right extensions
100d, 100e: upper and lower extensions
112: locking portion
114: nut part
132: through-hole for connecting rod
152: rebar
160: skeletal rebar
192: connecting rod

Claims (15)

A mechanism for installing a retaining wall by placing a plurality of precast panels on the front side of the cut surface to form a front portion of the retaining wall and injecting soil into the rear side of the precast panel. It has a panel fastening means which is latched and supported so as not to be separated out of the panel by the reinforcing bars in the panel, the panel fastening means has a state exposed only toward the rear from the center of the rear panel rear portion, the front portion A precast panel installed in a state of facing the front side of the front cutout surface; A connecting rod having one end fastened to the panel fastening means of the precast panel and the other end extending in the direction of the cut surface of the surface; A base rod that is fixed by grouting to a hole punched in a front cut surface and whose one end is exposed to the outside of the hole; A first coupler coupled to the other end of the connecting rod and a second coupler coupled to one end of the base rod are integrally formed to couple the connecting rod and the base rod to each other; The precast panel is configured to receive a supporting force from the base bar fixed to the front cut surface to prevent lateral movement. The precast panel has a polygonal front shape and has a predetermined thickness. And a panel fastening means formed integrally with a locking part held by a reinforcing steel bar provided at a rear side of the panel body and a nut part exposed toward the rear side from a center side of the rear surface of the panel body, and horizontally or At least one internally installed on the rear side of the reinforcing bar at an angle not equal to the rebar in the longitudinal direction; And a skeletal reinforcement on the upper surface, wherein the panel fastening means is latched and supported so as not to be separated from the outside by the support force transmitted from the base rod through the locking portion, and the one end of the connecting rod is fastened to the panel fastening means. Silver, one end of the connecting rod formed with a bolt is screwed with the nut portion, wherein the first fastening means and the second fastening means of the coupler each comprises a through-nut part, the through type of the first fastening means The central axis of the nut part and the central axis of the through nut part of the second fastening means are integrally formed with each other in an inclined angle, and the inclination angle of the coupler is a connection angle between the connecting bar and the base bar. And a bolt part is formed at the other end of the connecting rod and one end of the base rod, respectively. Retaining wall using a retaining wall installation mechanism configured to be fastened to the through nut part of the first fastening means or the through nut part of the second fastening means, respectively, the other end and one end of which are passed through the through nut part. As a way to install
1) excavating the normal surface to form a cut surface;
2) drilling holes in the cut surface;
3) inserting the base rod into the perforated hole and fixing it by grouting, fixing one end of the base rod to be exposed out of the hole;
4) placing the precast panel on the front part of the cut surface so that the front part faces the front side of the front cut surface, and fastening the connecting rod to the panel fastening means provided in the precast panel;
5) The connecting rod and the base rod are interconnected by using a coupler, but the first coupling means of the coupler is screwed to the other end of the connecting rod, the coupler at one end of the base rod When the coupler is rotated to screw the second fastening means of the coupler, the coupler is moved backward in the screwing process with the base rod, and the connecting rod fastened to the first fastening means of the coupler and Causing the precast panel to move backwards as well; And
6) a backfilling and compacting process by putting soil into the rear space of the precast panel in the stacked state; retaining wall installation method comprising a.
delete delete delete delete delete delete delete delete delete delete delete delete delete A mechanism for installing a retaining wall by placing a plurality of precast panels on the front side of the cut surface to form a front portion of the retaining wall and injecting soil into the rear side of the precast panel. It has a panel fastening means which is latched and supported so as not to be separated out of the panel by the reinforcing bars in the panel, the panel fastening means has a state exposed only toward the rear from the center of the rear panel rear portion, the front portion A precast panel installed in a state of facing the front side of the front cutout surface; A connecting rod having one end fastened to the panel fastening means of the precast panel and the other end extending in the direction of the cut surface of the surface; A base rod that is fixed by grouting to a hole punched in a front cut surface and whose one end is exposed to the outside of the hole; A first coupler coupled to the other end of the connecting rod and a second coupler coupled to one end of the base rod are integrally formed to couple the connecting rod and the base rod to each other; The precast panel is configured to receive a supporting force from the base bar fixed to the front cut surface to prevent lateral movement. The precast panel has a polygonal front shape and has a predetermined thickness. And a panel fastening means formed integrally with a locking part held by a reinforcing steel bar provided at a rear side of the panel body and a nut part exposed toward the rear side from a center side of the rear surface of the panel body, and horizontally or At least one internally installed on the rear side of the reinforcing bar at an angle not equal to the rebar in the longitudinal direction; And a skeletal reinforcement on the upper surface, wherein the panel fastening means is latched and supported so as not to be separated from the outside by the support force transmitted from the base rod through the locking portion, and the one end of the connecting rod is fastened to the panel fastening means. Silver, one end of the connecting rod formed with a bolt is screwed with the nut portion, wherein the first fastening means and the second fastening means of the coupler each comprises a through-nut part, the through type of the first fastening means The central axis of the nut part and the central axis of the through nut part of the second fastening means are integrally formed with each other in an inclined angle, and the inclination angle of the coupler is a connection angle between the connecting bar and the base bar. And a bolt part is formed at the other end of the connecting rod and one end of the base rod, respectively. Retaining wall using a retaining wall installation mechanism configured to be fastened to the through nut part of the first fastening means or the through nut part of the second fastening means, respectively, the other end and one end of which are passed through the through nut part. As a way to install
1) excavating the normal surface to form a cut surface;
2) drilling a plurality of holes in the cutting surface at regular intervals along the longitudinal and transverse directions;
3) inserting a base rod into each perforated hole and fixing it with grouting, wherein one end of the base rod is exposed to the outside of the hole;
4) A plurality of precast panels are placed in contact with each other along the up, down, left and right directions on the front of the cutting surface such that the front portion faces the front side of the front cut surface, and the panel fastening means provided in each precast panel Fastening respective connecting rods;
5) each of the connecting rods and the base rods are interconnected by using a coupler, wherein the first fastening means of the coupler is screwed to the other end of the connecting rods, one end of the base rods When the coupler is rotated to screw the second fastening means of the coupler, the coupler is moved rearward in the process of screwing with the base rod, and the connection for fastening to the first fastening means of the coupler Allowing the bar and the precast panel to move backwards as well; And
6) a backfilling and compacting process by putting soil into the rear space of the plurality of precast panels in a stacked state; retaining wall installation method comprising a.

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