KR100987463B1 - Structure of reinforced earth retaining wall and method for constructing the same - Google Patents

Abstract

The present invention relates to a reinforced soil retaining wall structure and a method for installing the same. Specifically, the mechanical anchor device 45 is inserted into the horizontal bolt hole 30 formed to penetrate the reinforced concrete wall 20 and the arm foundation. ), One end of the lock bolt 40 is fixed to the wall of the horizontal drilling hole 30, and the other end of the lock bolt 40 located on the outside of the reinforced concrete wall 20 is screwed By applying a tensile force to both ends of the lock bolt 40 is characterized in that the compressive stress is caused to the arm base located between the both ends of the lock bolt (40). According to the present invention, the cutting rock slope is relaxed by vertically constructing the fine pile, so that the reinforcement soil wall is unstable, unlike the conventional art, the horizontal compression stress acts on the rock slope by the horizontal rock bolts at both ends to stabilize the rock slope. Therefore, even in the case of hard weathered rock and soft rock, it is possible to install a stable reinforced soil retaining wall.

Reinforced soil retaining wall, both ends tension horizontal rock bolt, mechanical anchor, physical anchoring

Description

Structure of reinforced earth retaining wall and method for constructing the same}

The present invention relates to a reinforced earth retaining wall structure and a method of installing the same, and more particularly, to a reinforced earth retaining wall structure and a method of installing the same by maximizing stabilization of a rock slope by inducing horizontal compressive stress on the rock slope using both ends of horizontal tension bolts. .

The present invention also relates to a multi-stage reinforced soil retaining wall structure of a top-down method in which the reinforced soil retaining wall is formed in multiple stages from above and its installation method.

Construction of roads and railways is required for the construction of new towns and the smooth connection between cities. At this time, the cutting or filling of the terrain is made. If the cut or filled terrain is left as it is, there is a possibility that the soil on the inclined surface may collapse, and a reinforcing soil is needed.

Various installation methods of reinforcement earth retaining walls have already been introduced, and most of them focus on maintaining the stability of the reinforcement earth retaining walls without collapse. However, the conventional reinforcement soil retaining wall installation method has a problem that the cutting rock slope is relaxed and unstable by the micro-pile vertically (micro-pile) construction on the base of the retaining wall. Therefore, the conventional reinforced soil retaining wall is unstable when installed in hard weathered rock or soft rock, and especially when the reinforced soil retaining wall is set high, this instability is very large.

Accordingly, an object of the present invention is to provide a reinforced soil retaining wall structure and its installation method which can be stably maintained even in hard weathering or soft rock by stabilizing rock slopes.

Reinforcing soil wall structure according to the present invention for achieving the above object is located under the arm cutting slope and the arm foundation having a vertical surface by reinforced concrete lining; A reinforced concrete wall vertically installed to contact a vertical surface of the arm foundation; It is inserted into a plurality of horizontal drilling holes penetrating the reinforced concrete wall and the arm base portion, one end is inserted into the horizontal drilling hole is installed a mechanical anchor device that is embedded in the wall of the horizontal drilling hole and the outside of the reinforced concrete wall The other end of the tension is tightened by screwing both ends tension tension bolt is provided between the both ends tension lock bolt to induce a compressive stress on the arm base located between the both ends; A front finishing block layer laminated on the reinforced concrete wall; And an ingot that is to be reinforced by a fiber reinforcement between the front finishing block layer and the female cutout surface.

It is preferable that the grout agent is filled in the empty space in the horizontal drilling hole into which the lock bolt is inserted.

It is preferable that a resin cartridge is installed in the space between one end of the lock bolt inserted into the horizontal hole and the end of the horizontal hole to be compressed and burst by the pushing force during the installation of the lock bolt to eject the adhesive resin. .

Preferably, the lock bolt and the mechanical anchor device are coupled to each other by a male screw part of the lock bolt and a female screw part of the mechanical anchor device. At this time, the lock bolt is provided at the end of the male screw part of the lock bolt. A fastening jaw having an inclined surface is installed to push the inlet of the mechanical anchor device outward as it moves forward into the female screw portion of the anchor device, and the inlet of the mechanical anchor device is spread outwards in a wing shape by the locking jaw to the horizontal It is preferable to make multiple cuts in the longitudinal direction so as to be embedded in the wall of the hole.

The reinforcing soil wall may be formed in multiple stages from the top to the bottom in a top-down manner, which is very desirable when the reinforcing soil wall is to be set high.

Reinforcing soil retaining wall installation method according to the present invention for achieving the above object, the step of cutting and rearranging the slope of the arm to obtain a cancer cut slope; Obtaining a vertical surface by performing reinforced concrete lining on an arm foundation positioned under the arm cutting slope; Installing a reinforced concrete wall to be in contact with the vertical surface; Forming a plurality of horizontal perforation holes in the arm base by penetrating the reinforced concrete wall; Fixing one end of the lock bolt by inserting a lock bolt having a mechanical anchor device at one end into the horizontal drill hole through the reinforced concrete wall so that the mechanical anchor device is embedded in the wall of the horizontal drill hole; Screwing the other end of the lock bolt located outside of the reinforced concrete wall to induce a compressive stress to the arm base located between the lock bolts by applying tension to both ends of the lock bolt; And stacking a front finishing block on the reinforced concrete wall and depositing a lump in which fiber reinforcement is interposed between the front finishing block and the female cutting slope.

After the forming of the horizontal drilling hole, the method may further include inserting a resin cartridge containing an adhesive resin in the drilling hole, wherein the lock bolt is inserted into the horizontal drilling hole to the mechanical anchor. Preferably, the resin cartridge is pushed to the end of the horizontal drilling hole by the lock bolt and compressed by the pushing force so that the adhesive resin is ejected in the process of causing the device to be embedded in the wall of the horizontal drilling hole.

Preferably, the lock bolt and the mechanical anchor device are coupled to each other by screwing the male screw part of the lock bolt and the female screw part of the mechanical anchor device. In this case, the lock bolt is formed at the end of the male screw part of the lock bolt. A fastening jaw having an inclined surface is installed to push the inlet of the mechanical anchor device outward as it moves forward into the female screw portion of the mechanical anchor device, and the inlet of the mechanical anchor device is cut in multiple places in the longitudinal direction so that the lock bolt is As it moves in, it is preferable to be spread outwardly in the form of a wing by the locking jaw to be embedded in the wall of the horizontal drilling hole.

And filling the grout agent into the empty space in the horizontal drilling hole after the step of causing the compressive stress in the arm base.

When the reinforcing soil wall is to be set high, it is stable to install the reinforcing soil wall in multiple stages from the top to the bottom by repeating the method of installing the reinforcing soil wall.

According to the present invention, the cutting rock slope is relaxed by vertically constructing the fine pile, so that the reinforcement soil wall is unstable, unlike the conventional art, the horizontal compression stress acts on the rock slope by the horizontal rock bolts at both ends to stabilize the rock slope. Therefore, even in the case of hard weathered rock and soft rock, it is possible to install a stable reinforced soil retaining wall.

It is also suitable for installing multi-stage reinforced soil retaining walls in a top-down manner because the rock slopes are very stable. The top-down method does not form the earthwork cross section at the entire height of the retaining wall at the same time. Since only one step of retaining wall is used to cut the cancer, the amount of cut is not only minimized, but the relaxation of the slope is minimized. There is an advantage that the retaining wall construction can be carried out while maintaining its stability. Therefore, this top-down multi-stage method is very effective when building a reinforced soil retaining wall.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are only presented to understand the content of the present invention, and those skilled in the art will be capable of many modifications within the technical spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited to these embodiments.

1 is a view for explaining a reinforced earth retaining wall structure and its installation method according to the present invention. As shown in FIG. 1, the reinforced soil retaining wall according to the present invention includes a reinforced concrete wall 20, a reinforced concrete wall 20, and the arm foundation that are erected perpendicularly to an arm foundation positioned under an arm cutting slope 10. Both ends of the tension-type lock bolt 40 is inserted into the horizontal drilling hole 30 penetrating the portion, the resin cartridge 70 is installed at the end of the horizontal drilling hole 30 to burst by the compressive force to eject the adhesive resin, The front finishing block layer 50 stacked on the reinforced concrete wall 20, and the ingot 90 which is filled to be reinforced by the fiber reinforcement 60 between the front finishing block layer 50 and the female cutting slope 10. It is made, including.

Referring to the installation method of the reinforced soil retaining wall according to the present invention in detail, first, the arm cutting slope 10 is formed on the arm 100, the vertical surface and the horizontal plane is located at the base of the arm located below the arm cutting slope 10 After the reinforced concrete lining (L) to create a reinforced concrete wall 20 as a retaining wall basis. A plurality of horizontal drilling holes 30 are formed to penetrate the reinforced concrete wall 20 and the arm foundation. A plurality of horizontal drilling holes 30 are installed, but only one is shown in the drawings for convenience of description.

Next, the resin cartridge 70 containing the adhesive resin, for example, epoxy, is inserted into the horizontal drilling hole 30, and then the resin cartridge 70 is horizontally drilled with the rock bolts 40 at both ends. Push deep into). When the resin cartridge 70 reaches the end of the horizontal punching flow 30, it can no longer be pushed in, so the pushing force of the lock bolt 40 causes a compressive stress to the resin cartridge 70, thereby causing the resin cartridge. 70 is blown off and the said adhesive resin is blown out. Before pushing the lock bolt 40 into the horizontal drilling hole 30, the resin cartridge 70 may be opened by using a separate rod, but the resin cartridge 70 may be opened with the lock bolt 40 to simplify the process. It is desirable to burst.

The installation process of the both ends of the tension lock bolt 40 will be described in detail with reference to Figures 2a and 2b. Here, Figure 2a is a view for explaining both ends of the tension lock bolt 40, Figure 2b is for explaining the mechanical anchor device 45 is a view of the mechanical anchor device 45 from the inlet side.

As shown in FIG. 2A, the lock bolt 40 has male threads 43a and 43b formed at both ends of the body 41, and a mechanical anchor device is provided at the male screw 43b at the insertion end of the horizontal drilling hole 30. The female screw 44 of 45 is fastened.

A locking jaw 42 is installed between the body 41 of the lock bolt 40 and the insertion end male thread 43b, and the locking jaw 42 is a mechanism of the mechanical anchor device 45 as the male screw 43b moves forward. It has an inclined surface A to push the inlet outward. The inlet of the mechanical anchoring device 45 is pushed by the inclined surface A as the male screw 43b of the lock bolt 40 is advanced in the longitudinal direction so that it can be opened outward in the form of a wing 46 as shown in FIG. 2B. Multiple cuts are made.

When the resin cartridge 70 is pushed to the end of the horizontal drilling hole 30 by using the lock bolt 40, the resin cartridge 70 which can no longer be pushed out is burst by the compressive force. At this time, the adhesive resin ejected from the resin cartridge 70 hardens in contact with air to cause physical anchoring by the resin.

At the same time, the wings 46 of the mechanical anchoring device 45 are pushed outwards by the locking jaws 42 of the lock bolts 40 to be pushed outwards, and they are driven into the walls of the drilling holes 30. Unfolding no longer occurs, the mechanical anchoring device 45 is fixed like a wedge in the horizontal drilling hole 30 so that the lock bolt 40 is mechanically anchored in the drilling hole 30.

Then, after inserting the iron plate 81 into the male screw 43a at the inlet of the drilling hole 30 and tightening using the tightening nut 80, a tension force is applied to both sides of the lock bolt 40, and eventually the lock bolt. Compression stress is induced horizontally in the arm 100 sphere between the 40 is to prevent the relaxation of the rock slope.

Referring back to FIG. 1, after the tension at both ends of the lock bolt 40 is completed as described above, a grout, for example cement, is applied to the empty space 35 of the drilled hole 30 where reinforcement by the adhesive resin does not occur. Grouting is performed by filling mortar or cement milk.

Subsequently, the fiber reinforcement 60 is interposed between the front finish block 50 and the female cutting slope 10 while stacking the front finish block 50 on the reinforced concrete wall 20 as in the usual case (90). )).

In contrast to the prior art, the cutting rock slope is relaxed by vertically constructing a micro-pile to make the reinforcement retaining wall unsafe, and the present invention uses both ends of horizontal rock bolts 40 to induce physical and mechanical anchoring. Because the rock slope is very stable. Therefore, it is possible to install a stable reinforced soil retaining wall even in the case of hard weathered rock and soft rock.

In addition, since the rock slope is very stabilized, it is suitable for installing reinforced earth retaining walls in multiple stages. 3 is a view for explaining a method of installing a multi-stage reinforced soil retaining wall in a top-down (top-down) method. As shown in FIG. 3, the multi-stage reinforced soil retaining wall of the top-down method can be obtained by repeating the installation method of the reinforced soil retaining wall described in FIG. 1 by installing the reinforced soil retaining wall in multiple stages from above. At this time, in the last step, it is not necessary to form the reinforced concrete wall 20 for anchoring, and it is sufficient to install the base concrete 51 for supporting the front finishing block 50.

The top-down method does not form the earthwork cross section at the entire height of the retaining wall at the same time. Since only one step of retaining wall is used to cut the cancer, the amount of cut is not only minimized, but the relaxation of the slope is minimized. There is an advantage that the retaining wall construction can be carried out while maintaining its stability. Therefore, this top-down multi-stage method is very efficient when building a reinforced soil retaining wall.

1 is a view for explaining a reinforced earth retaining wall structure and its installation method according to the present invention;

2A is a view for explaining the both ends of the tension lock bolt 40;

2b is a view of the mechanical anchoring device 45 from the inlet side;

3 is a view for explaining a method of installing a multi-stage reinforced soil retaining wall in a top-down (top-down) method.

<Description of reference numbers for the main parts of the drawings>

10: cancer cut slope 20: reinforced concrete wall

30: horizontal drilling hole 40: both ends tension lock bolt

41: bolt body 42: locking jaw

43a, 43b: external thread 44: internal thread

45: mechanical anchor 46: wing

50: front finishing block layer 51: foundation concrete

60: fiber reinforcement 70: resin cartridge

90: lump

Claims (10)

An arm foundation positioned under the arm cutting slope and having a vertical surface by reinforced concrete lining; A reinforced concrete wall vertically installed to contact a vertical surface of the arm foundation; It is inserted into a plurality of horizontal drilling holes penetrating the reinforced concrete wall and the arm base portion, one end is inserted into the horizontal drilling hole is installed a mechanical anchor device that is embedded in the wall of the horizontal drilling hole and the outside of the reinforced concrete wall The other end of the tension is tightened by screwing both ends tension tension bolts are provided between the two ends tension lock bolt to induce a compressive stress on the arm base located between the both ends; A resin cartridge installed in a space between one end of the lock bolt inserted into the horizontal drilling hole and the end of the horizontal drilling hole, the resin cartridge being compressed and burst by the pushing force when the lock bolt is installed to eject the adhesive resin; A front finishing block layer laminated on the reinforced concrete wall; And Reinforced earth retaining wall structure, characterized in that it comprises; the earthwork to be reinforced by the fiber reinforcement between the front finishing block layer and the female cutting slope. 2. The reinforced earth retaining wall structure according to claim 1, wherein a grout agent is filled in an empty space in the horizontal drilling hole into which the lock bolt is inserted. delete According to claim 1, The lock bolt and the mechanical anchor device is coupled to the male screw portion of the lock bolt and the female screw portion of the mechanical anchor device is screwed, the lock bolt is the end of the male screw portion of the lock bolt A fastening jaw having an inclined surface is installed to push the inlet of the mechanical anchor device outward as it moves forward into the female screw part of the mechanical anchor device, and the inlet of the mechanical anchor device is spread outwards in a wing shape by the locking jaw. Reinforcement earth retaining wall structure, characterized in that cut in multiple places in the longitudinal direction to be embedded in the wall of the horizontal drilling hole. The reinforced earth retaining wall structure of claim 1, wherein the reinforced earth retaining wall of claim 1 is formed in multiple stages from above. Cutting and arranging cancer slopes to obtain cancer cutting slopes; Obtaining a vertical surface by performing reinforced concrete lining on an arm foundation positioned under the arm cutting slope; Installing a reinforced concrete wall in contact with the vertical surface; Forming a plurality of horizontal perforation holes in the arm base by penetrating the reinforced concrete wall; Inserting a resin cartridge containing an adhesive resin into the drilling hole; Fixing one end of the lock bolt by inserting a lock bolt with a mechanical anchor device installed at one end into the horizontal drilling hole through the reinforced concrete wall so that the mechanical anchor device is embedded in the wall of the horizontal drilling hole, In the process of causing the mechanical anchoring device to be embedded in the wall of the horizontal drilling hole, the resin cartridge is pushed to the end of the horizontal drilling hole by the lock bolt and compressed and burst by the pushing force to eject the adhesive resin Making; Causing a compressive stress to the arm base positioned between both ends of the lock bolt by screwing the other end of the lock bolt located outside of the reinforced concrete wall to impart tensile force to both ends of the lock bolt. ; And And stacking a front finishing block on the reinforced concrete wall and laying a lump in which fiber reinforcement is interposed between the front finishing block and the female cutting slope. delete According to claim 6, The lock bolt and the mechanical anchor device is coupled to the male screw portion of the lock bolt and the female screw portion of the mechanical anchor device is screwed, the lock bolt is the end of the male screw portion of the lock bolt A fastening jaw having an inclined surface is installed to push the inlet of the mechanical anchor device outward as it moves forward into the female screw portion of the mechanical anchor device. Reinforcing soil retaining wall installation method characterized in that the bolt is advanced in the form of a wing outward by the locking step to be embedded in the wall of the horizontal drilling hole. 7. The method of claim 6, wherein the grout is filled in the empty space in the horizontal drilling hole after the compressive stress is induced in the arm base. A method of installing a reinforced soil retaining wall of a top-down method, comprising reinforcing soil retaining wall installed in multiple stages from above by repeating the method of installing the reinforced soil retaining wall of claim 6.

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