KR20170060540A

KR20170060540A - Repair construction method of geosynthetic reinforced retaining wall

Info

Publication number: KR20170060540A
Application number: KR1020150165106A
Authority: KR
Inventors: 정동면; 정인혁; 김희준
Original assignee: (주)나우기술
Priority date: 2015-11-24
Filing date: 2015-11-24
Publication date: 2017-06-01
Also published as: KR101793065B1

Abstract

The present invention relates to a construction method capable of performing a restoration work only on a portion where an uplift occurs in a reinforced earth retaining wall (1) in which any one of folding, subsidence, breakage, Unlike the method of using an earth anchor as shown in FIG. 1B or the method of newly constructing the adjacent reinforced earth retaining wall 1 to the limit of the collapse angle from the upper end to the lower end, only the portion where the above- The upper end portion of the reinforced earth retaining wall 1 which has been deformed in the construction method is not broken but the reinforcing earth retaining wall 1 is broken down from the lowermost end of the reinforcing earth retaining wall 1, And the upper part is not collapsed during the trenching process for the lower end construction. A method that can be constructed with green,
It is possible to restore only the reinforced earth retaining wall 1 in which the above-mentioned sagging has occurred without any influence on the adjoining good reinforcing earth retaining wall 1,
It is possible to restore the construction from the lowermost stage (the first stage) of the entire height of the reinforced earth retaining wall 1, thereby reducing the construction scale,
As the construction scale is reduced, the construction speed is faster, the air is shortened, and the construction cost is reduced. As with the third effect, it is expected that the effects of the three sites that provide the simplicity and ease of construction of the reinforced earth retaining wall (1) have.

Description

{Repair construction method of geosynthetic reinforced retaining wall}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a construction method capable of performing a restoration work only on a portion where an uplift occurs in a reinforced earth retaining wall in which any one of folding, subsidence, breakage, Unlike the method of using anchor or the adjacent reinforcing earth retaining wall, which is broken down to the limit of collapse angle from the upper end to the lower end and is newly constructed, the existing reinforcing earth retaining wall The upper end of the reinforced earth retaining wall where the rebound occurred in the construction method is not broken but the reinforced earth retaining wall is broken from the lowermost end and the restoration soil is restored and the restoration construction is gradually applied to the upper end to apply the restoration method. For the construction, the upper part collapses during the digging process. Relates to the recovery construction methods and structures of reinforced earth retaining wall can be constructed so as.

As a method of restoration and construction of general reinforced earth retaining walls, there is a method of constructing and assembling such that it can be restored from the beginning, as a method of constructing "building blocks for retaining walls, building prefabricated reinforced retaining walls and prefabricated reinforced earth retaining walls constructed by these blocks" , Korean Patent Registration No. 10-0431035.

The retaining wall, the retaining wall formed by the block, the method of constructing the retaining wall, and the method of repairing the retaining wall are described as including a front surface 10 forming the surface of the retaining wall, a back surface 20 contacting the reinforcing soil, ; Left and right side surfaces 30 and 30 'on which concave and convex engaging portions 32 and 32' corresponding to adjacent blocks are formed, respectively; A reinforcing material insertion groove 44 for receiving an anchor for connecting the reinforcing material or the reinforcing material is formed in the front and rear direction and a fixing groove 46 for fixing the reinforcing material or the anchor is provided on both sides of the front side of the reinforcing material insertion groove 44, An upper surface 40 formed in the right direction; And a lower surface 50 corresponding to the upper surface 40. The upper and lower surfaces 40 and 50 are provided with connection pin insertion holes h1 for fastening connection pins between upper and lower blocks, And the insertion hole (h2) is formed to pass through.

The process of constructing the reinforced earth retaining wall with the above block will be described. In the basic building step,

A block building step of laying the blocks adjacent to each other in a horizontal direction on a laid foundation, a step of stacking the blocks in a stepwise manner by using upper and lower connecting pins on each block horizontally laid,

The stiffening material is inserted into the reinforcing material insertion groove of the block so that the stiffener is connected to the block and the stiffener is disposed on the reinforcing material. The backfilled soil is piled up on the stiffener to be discharged, The reinforcing material excretion and the compaction step of the reinforcing soil,

In a front view (FIG. 7) showing a partial renovation process of the reinforced earth retaining wall constructed as a block according to the present invention and a front view (FIG. 8) of a retaining wall for explaining a whole renovation process, If the block is partially damaged after the completion of the construction, the building block is lifted up and dismantled at the top of the column corresponding to the block of the damaged part in the order of operation ① → ②,

When the block is dismantled, the stiffener inserted in the stiffener insertion groove of the block is lifted up and separated from the block, the block is lifted and disassembled,

Removing the broken block after top block disassembly,

Placing a new block on the damaged part and fastening the upper and lower connecting pins to connect the end of the reinforcing material embedded in the reinforcing material to the reinforcing material insertion groove of the new block,

And rebuilding the disassembled blocks in the reverse order of the disassembling step.

Since blocks adjacent to the left and right sides of the retaining wall constructed according to the present invention are constructed so as not to interlock or cross each other, when a block constituting any one of the blocks constituting the retaining wall is broken, only the column to which the broken block belongs It is necessary to dismantle the block or the panel entirely in order to replace the damaged block or panel in the conventional block or the panel type retaining wall since the block can be rebuilt after the broken block is removed from the top in order, It is possible to promptly repair a small number of workplaces in a small work space. When several rows are broken, as shown in FIG. 8, the same operations as those in the explanation of the partial renovation work from the one column to the other column That is, ① → ② → ③ → ④ → ⑤ → ⑥ → ⑦ → ⑧ → ⑨ → ⑩ It is plane.

Since the reinforced earth retaining walls are not interlocked with each other, the blocks adjacent to the left and the right of the reinforced earth retaining walls are only unevenly coupled with each other. Therefore, when the reinforced soil or the ground is partially or partially damaged, So that the effect can be resumed.

However, in the case of the above-mentioned patent, when all damages occur at the lower end of the retaining wall, all of the blocks at the upper end are lifted, and when the damaged block is dismantled and re-run, all the damaged upper heat is removed, There is a danger that the slope of the backfill soil is caused and the slope due to the angle of repose is generated and the neighboring reinforced soil block is separated from the reinforcing soil and exposed to collapse with the band fiber reinforcement. In case of high height of the retaining wall, In case of damages to the lower part of the lower step in the stepped retaining wall, in the process of dismantling the reinforced soil block to the upper part, the collapse of the backfilled soil is connected with the reinforced soil block adjacent to the front and left and right sides. Because the cascade retaining wall of the There was a non-issue.

Korean Patent No. 10-0431035

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a reinforced earth retaining wall adjacent to a reinforced earth retaining wall having any one of folding, subsidence, breakage, In the recovering method, the lowermost portion of the reinforced earth retaining wall is first applied, and the portion is gradually moved to the upper end portion to recover. Finally, The good reinforced earth retaining wall is intended to reduce the construction cost by restricting only the part where the overturning occurred, while preventing the backlash from being affected by the collapse of the soil, even when the part where the uplift occurred is dismantled. ,

Further, the present invention can be applied to a method of safely restoring and constructing the reinforced earth retaining wall in a stepwise manner from the lowermost to the uppermost end of the reinforcing earth retaining wall, so that the construction scale can be restored without expanding to the adjacent reinforcing earth retaining wall So that the construction can be simplified and the air can be shortened. Such a method can be applied to any reinforced soil block irrespective of the method of stacking the blocks constituting the reinforced earth retaining wall and the standard have.

In order to accomplish the above object, the present invention provides a method and structure for repairing a reinforced earth retaining wall in which a reinforced earth retaining wall portion, which is formed by any one of folding, subsidence, breakage,

A step of crushing a block of the lowermost (first-stage) reinforced-earth retaining wall horizontal part heat-inserting step (S10) of perforating, sanding and earth-

The support beam supporting the main beam and the retained steel beam, installing the beams, installing the beam support beams and tensioning the PC strand at the central portion (S20)

A block fracture of vertical heat, a cement grouting step (S30) of the reinforced earth retaining wall where the sagging occurred on both side portions,

An inner excavation, a root canal arrangement, a soil nail anchor construction step (S40)

The reinforcing soil block and the connection between the soil nail anchor and the fiber reinforcement band, the back side cement backing step (S50)

The step of repeating the construction from step S10 to step S50 and the step of recovering the earth retaining steel (step S60)

A finishing step (S70) of removing the roof and supporting facilities,

(The last stage) such as the upper end (third stage), the upper stage (fourth stage), and the like.

The present invention has a first effect of restoring only a reinforced earth retaining wall in which any one of folding, sinking, breakage, warping, and the like has occurred without any influence on adjoining good reinforcing earth retaining walls,

It is possible to restore construction from the lowermost stage (the first stage) of the entire height of the reinforced earth retaining wall, thereby reducing the construction scale,

The third effect is that the construction cost is reduced due to the construction speed being reduced, the air is shortened, and the construction cost is reduced. Thus, the three effects can be expected to have the simplicity and ease of construction of the reinforced earth retaining wall construction and the efficiency of the work.

1 to 10 illustrate an embodiment according to the present invention,
1 is a view showing a process flow according to the working process of the present invention
FIG. 2 is a schematic view showing a front view of a reinforced earth retaining wall in which an uplift is generated in a process flow of the present invention in a state where the main beam and the earth retaining steel are installed at the lowermost end (first end) and the beams, support beams, drawing
Fig. 3 is a schematic view of the front view of Fig. 2,
Fig. 4 is a side view of Fig. 2 and schematically shows a state in which the soil nail anchor and the reinforcing soil block are connected and connected together. Fig.
Fig. 5 is a schematic view showing in detail the arrangement and details of the hearth and the earth retaining steel, which are loop facilities, at any stage where the reinforced earth retaining walls where the rebound has occurred are divided into several sections to perform restoration work.
FIG. 6 is a schematic view showing in detail the details of connecting a fiber reinforcement band around a hanger pin reinforced by a sole nail anchor, and the details of the structure of the hanger;
6A is a perspective view schematically showing a hanger fixed to a sole nail anchor;
FIG. 7 is a cross-sectional view schematically showing the arrangement of a bundle and the connection of a hook of a sole nail anchor in a reinforced earth retaining wall in which reinforcement soil blocks are alternately stacked.
Fig. 8 is a schematic cross-sectional view showing the planar arrangement of the bundling bars in the row of reinforcing soil blocks in Fig. 7
9 is a schematic cross-sectional view showing the frontal arrangement of the bundle of reinforcing soil blocks;
10 is a schematic cross-sectional view of a two-band binding method of a hook and a bundle, and a band binding and a hook detail;

In the present invention, in order to repair the reinforced earth retaining wall where the rebound occurred, the reinforced earth retaining wall is not broken, but the reinforced earth block is broken and restored from the lowermost stage (first stage) And the method of making the safety construction function work, etc., and suggests a method to reduce construction cost and shorten the construction time.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

As shown in FIG. 1,

And a finishing step (S70) for removing the roof, supporting facilities, and the like.

Accordingly, the flow of the present invention and the respective constitutions thereof will be described by dividing each of the above steps into processes.

Lowest (1st) Reinforced earth retaining wall Horizontal portion One-sided Block Crushing, puncturing, Retained river The pressing-in step ( S10 )

As shown in FIG. 2, in this step, as shown in FIG. 2, the reinforcing soil retaining wall 1 in which any one of folding, subsidence, breakage, And the horizontal support beam 101 is a step for pressing and pushing the horizontal support beam 101 and the earth retaining steel 102 to a predetermined depth. The horizontal support beam 101 supports a fixed load different from the weight of the upper- And the earth retaining steel (102), which is pushed to the annulus steel, plays a role of supporting the top load with the main beam (101) while preventing the top particle from leaking out.

As a method of pushing and pushing the main beam 101 according to the present invention, horizontally boring is performed, and the main beam 101, which is a steel pipe of the casing, is inserted into the perforation hole and then hit to be buried at a predetermined depth in the ground. The earth retaining steel 102 is disposed between a main beam 101 and the adjacent main beam 101 and serves to divide the lower side of the lowest stage (first stage) and the lower side of the upper stage (second stage) A plurality of holes are drilled at a position to be press-fitted, so that the ground is loosely formed, and then the press-fitting is performed by vibro-hammering or the like.

In the meantime, the above-mentioned bearing 101 is used as a single-piece annular beam 101 by inserting a smaller steel pipe into a steel pipe of a casing, and the casing caulk 101 is buried in a future facility 101 where only the core 101 ' .

First, the construction of the annulus 101 and the earth retaining steel 102 in Fig. 5 will be described.

It is preferable that the casing main beam 101 is formed so as to serve as a guider 101a of the earth retaining steel 102 by welding L-shaped steel to the left and right sides of the casing annulus 101. [ It is preferable to arrange the earth retaining steel 102 between the both side annular beams 101 and push it in a concavo-convex shape as shown in FIG. 5. This is because the soil particles are prevented from flowing out The two-sided sand retaining structure of the concavo-convex type, which is press-fitted along the guider 101a of the main beam 101, adjacent to the main beam 101 when the retaining steel 102 is pressed by the main beam 101, So that the unidirectional flange of the steel 102 acts as a guider 102a of the convex-type earth retaining steel 102 which is propelled to the center.

The length in the horizontal direction is made up of the annulus 101 and the earth retaining steel 102 so as to push and push the reinforcing earth retaining wall 1 into the wide width where the uplift occurs. The loop facility 2 composed of the main beam 101 supporting the upper end (second stage) and the earth retaining steel 102 is terminated and the loop facility 2 described above even when the lower end (first stage) It will prevent the outflow of the particles.

Meanwhile, in the process of crushing the upper portion of the reinforced soil block 100 from the lower end (first end) region to the upper end to construct the loop facility 2 composed of the annulus steel 101 and the earth retaining steel 102, It is preferable that the reinforced earth block 100 is first crushed and removed at a predetermined horizontal interval where the main beam 101 can be installed in addition to the location where the reinforcing earth block 100 is installed, The loop facility 2 and the upper (second) reinforced soil block 100 are installed at the same time as the earth retaining wall 102 is installed, It should be filled tightly so that there is no gaps between them. This is to prevent the deflection of the upper (second) reinforced soil block 100 during construction due to the above gap.

News A retaining river Supporting beams Crossbow install, Crossbow Sarjibo Installation and Stretching Phase of PC Strand in the Center ( S20 )

The step to be applied to the present invention following the previous step S10 includes a supporting beam 106 capable of supporting the loop facility 2 and a beam 103 connecting the loop facility 2 and the supporting beam 106 A supporting facility 3 for tilting the girder beam 104 of the beam 103 and the PC strand 105 for reinforcing the center portion of the beam 103 will be described.

2 and 4, a supporting beam 106 supporting the loop facility 2 formed by the annulus 101 and the retaining steel 102 is connected to both sides of the loop facility 2 by a beam 103 and a lattice A transverse beam 103a is installed at a position vertically installed to be connected to the transverse beam 103 and a support beam 106 installed at the lower end of the roof structure 2 and a transverse beam support bracket 104b supporting the transverse beam 103b. (106).

In addition, it is necessary to complement the facility for reducing the staple and the facility for reinforcing the central part of the crossbeam 103. This is because the crossbeam 103 is installed in the crossbeam 103 when various equipment are loaded on the roof facility 2, And a member force such as a deflection or a moment may be generated in the crossbeam 103 due to the overhead load applied to the crossbeam 103. This may cause deformation of the crossbeam 103 and may result in collapse of the upper end Since it is necessary to cope with the above-mentioned risk by reinforcing the member against the member force while reducing the length of the crossbeam 103,

A configuration in which a limb resilient support 104a is arranged in a direction transverse to several support beams 106 at a certain upper position of the support beam 106 and a limb resilient bracket 104b supporting the support beam 106 is fixed As shown in FIG. 4, an 'X' bracing 108 for connecting the support beams 106 is installed. The bracing support 104 is connected to the transverse beam 103 and the limb support 104a. And the PC beam strand 105 protrudes from the center of the beam 103 to the lower flange of the beam 103. The PC beam 101 is fixed to the supporting beam 106 and the beam 101, So as to reinforce the rigidity of the beam 103 and to resist the member forces.

amount On the side Reimbursement Generated Reinforced soil On the retaining wall Perpendicular One-sided block Crushing and cement grouting steps ( S30 )

In this step S30, the crushing of the upper horizontal reinforced concrete block 100 and the previous stage for internal excavation after the supporting facility 3 supporting the loop facility 2 and the roof facility 2 are completed, It is preferable to first provide a measure for preventing collapse of the side wall portion in advance.

For this purpose, as shown in FIG. 2, the reinforcing earth block 100 in the vertical portion at the lowermost end of the reinforced earth retaining wall 1 is crushed by a gradual method such as a horizontal portion, and the cement grouting 110 (4), the ground reinforcement (4) is pierced by a plurality of holes so that the grouting can be evenly spread in the horizontal and vertical directions, and the grouting is progressively moved from the upper side to the lower side to reinforce the infusion do.

On the other hand, even when crushing the reinforced concrete block 100, all of the necessary portions are not removed at once, but the reinforcing soil block 100 on the upper side is crushed first and the ground reinforcement 4 is moved in the descending order. .

Internal excavation and foundation foundation, Close-up Soil Nail Anchor Construction phase ( S40 )

After the ground reinforcement (4) and the support facility have been installed up to the previous step (S30), the inside of the part where the rebound occurred in earnest should be excavated. At the lowest part (1st step) The reinforced soil block 100 is disassembled from the upper side to the lower side and the inside is excavated to a certain depth to check the existence of the drainage path at the base end and the drainage path is secured so that the water can be smoothly moved.

After securing the drainage at the base end, the reinforcing bars of the soilless nail anchor (111) are purchased through the perforations at a certain interval in the covering portion, and the perforation grout is grouted so that the soilless nail anchor (111) do.

On the other hand, at the time of internal excavation, the excavation surface will be stabilized by the roof reinforcement (2) at the upper stage and the ground reinforcement (4) by the side cement grouting (110). Therefore, after the inside excavation, the soil nail anchor (111) (2).

However, a facility for connecting the binding nail anchor 111 to the binding bar 116, which is a binding device with the deep reinforcing bars 115 vertically binding the reinforcing bar block 100, is required for the toe nail anchor 111. In the present invention, (111), a hook (112) using a c-section is installed, and the sole nail anchor (111) head is fastened with a nut (119).

The hanger 112 using the c-shaped steel tube installed on the head of the soil nail anchor 111 needs a facility to bind the fiber reinforcing band 117. The hook of the fiber reinforcing material 117 And a plurality of pin reinforcing bars 113 which are capable of binding the fiber reinforcing bands 117 behind the plurality of cut surfaces 118 are formed into a plurality of I- The cloth tool 113a is inserted into the upper and lower sides of the hook 112 using the section steel and fixed by circumferential welding. The reason for constructing such a plurality of facilities is that a sole nail anchor 111 is connected to a bundle 116 which is a bundling device with a deep reinforcing bar 115 vertically bundling a plurality of reinforcing soil blocks 100 vertically, It is for this reason.

In addition, since a plurality of bundled fiber reinforcing bands 117 should exhibit a tensile strength against transverse earth pressure as a material for the hanger 112 using the c-section steel, it is a rigid facility that must secure a sectional force against the transverse earth pressure However, the shape of the latching member 112 in the present invention is not limited to the c-section steel.

On the other hand, the stud 111a is fastened to the tip of the soil nailing anchor 111 by using a screw or the like to secure the resistance to the soil nailing anchor 111 so that the pulling force is not extracted from the action surface .

This is because a plurality of reinforcing soil blocks are connected to one soil nailing anchor 111, and the pulling force of the soil nailing anchor 111 is large. Therefore, it is necessary to increase the pulling resistance of the soil nailing anchor 111 as much as possible.

Reinforced soil block Stacking and Soil Nail Anka As a fiber reinforcement band connect, Soil cement Backfilling S50 )

After the completion of the previous step S40, the reinforcing soil block 100 is stacked and connected to the soil nail anchor 111 by using the fiber reinforcing material band 117. For this purpose, as shown in FIG. 7, in order to vertically bind the upper and lower reinforcing soil blocks 100 when stacking the reinforcing soil blocks 100 in a zigzag manner as shown in FIG. 7, the reinforcing soil block 100 is provided with a deep hole 115a, The reinforcing soil block 115 is inserted into the deep hole 115a and the reinforcing soil block 115 is inserted into the deep reinforcing soil block 115b so as to prevent the reinforcing soil block 115 from falling over the deep hook 115b. At this time, when the reinforcing soil blocks 100 are stacked, a bundling iron mounting hole 116a is formed in a portion where the reinforcing soil blocks 100 are abutted against each other so that the bundling iron 116 can be installed, So that it can be inserted. The reinforcing soil block 100 is stacked while the bundling rods 116 are installed between the bundling rods mounting holes 116a installed in such a manner that the binding rods 116 and the hooks 112 of the sole nail anchor 111 head To the fiber reinforcing material band 117 by the band binding 117a so as to pull the reinforcing soil block 100 so as not to be pushed by the earth pressure.

Here, as a method of binding with the fiber reinforcing material band 117, the two-band binding method of Fig. 10 can be used.

The two-band binding method is to designate a 'V' type binding method in which two hooks 116 are bound to one of the hooks 112. The two-band 'V' type binding method is specifically described The fiber reinforcing material band 117 is wound around the pin reinforcing bar 113 by rotating the pin reinforcing bar 113 one turn through the cut surface 118 of the hook 112 and then the fibers 116 at both ends And the stiffener bands 117 are band-coupled 117a.

As shown in FIG. 7, the hooks 112 are coupled to the four hooks 116 at one location as shown in FIG. 7, but the present invention is not limited to the shape shown in FIG. 7 and may be changed depending on the height of the reinforcing earth retaining wall 1 It is possible to change the number of positions for binding the fiber reinforcement band 117 to the hook 112 according to the influence of the earth pressure.

On the other hand, it is preferable that the backfill is backfilled by using a soil cement method or by using a modified soil to which the solidified soil 114 is added. This is because when the backfill is backed up with general soil, sufficient compaction is required. However, since the internal space that can be compromised is insufficient, compaction of the soil cement 111 may be insufficient. Because the effect can be achieved.

(1) Upper roof (1) Upper roof (1) Upper roof (2) Upper floor (1) Upper floor (2) Upper floor It is impossible to install the reinforced concrete block 100. At this time, the uppermost reinforced concrete block 100 is stopped and the lower reinforced concrete block 100 is lowered. (Two-stage) loop after supporting the upper load by filling the solidified soil 114 in the gap formed between the roof structure 100 and the roof structure 2 due to the load at the upper end (second stage) It is preferable to install the facility 2 first. To this end, all the supporting facilities such as the beam 103, which is installed at the lowermost stage (the first stage) which can support the roof facility 2 by extending the lowermost stage support beam 106 to the upper stage (3) should be installed repeatedly at the top (2nd stage).

Top (2 levels) Reinforced earth retaining wall Horizontal portion One-sided block Crushing, S10 In step S50 Repeat steps up to step Retained river Recovery step ( S60 )

This step S60 is a step for the facility at the upper end (second stage) after completion of the construction at the lowermost stage (first stage). Step S60 is a step for constructing the reinforced soil block 100 gradually from the bottom surface to the top surface, The reinforcing soil block 100 can no longer be installed due to the roof facility 2 on the uppermost level (the first stage) when the roof facility 2 near the lowermost (first stage) upper surface is reached while the stacking and backfilling are being advanced. It is necessary to stop construction of the upper reinforced soil block 100 at the lowermost stage (first stage) and preferentially install the roof facility (2) at the upper stage (second stage).

The facility at the upper end (the second end) includes the loop facility 2 that was installed at the lowermost end (the first end) to extend the lowermost (first end) support beam 106 to support the loop facility 2 Since all the supporting facilities 3 must be installed repeatedly at the upper end (second stage), the lowermost (first stage) loop facility 2 is exposed at the upper stage (second stage) (2) of the loop facility (102) which is installed in the loop facility (2) is demolished at this time.

On the other hand, the reinforcing soil block 100 that has been stopped at the lowermost stage (first stage) continues to be stacked. At this time, the reinforced earth block 100 which is in contact with the casing main beam 101 and the main beam 101 'installed at the casing is to be installed after removing the main beam 101' sandwiched in the casing in the final finishing step S70. In addition, stacking of the reinforced soil block 100 at the upper end (second stage) and backfilling of the backfill should be repeatedly carried out in the same manner as in the lowermost stage (first stage).

Loop and Support facilities Finishing step to demolish ( S70 )

As described in the previous steps S10 to S60, the loop 2 and supporting facility 3 and the backfilling method as in the lowermost stage (first stage) are repeatedly applied at the upper stage (second stage) A method of recovering the retained steel 102 installed at the upper end (third stage), and a method of applying the retained steel 102 to the upper end (third stage) are repeatedly applied. The roof 2 and the supporting structure 3 which are installed from the lowermost stage (first stage) are removed, and the core stem 101 in which the casing stem 101 is installed is provided with core material The main beam 101 'sandwiched by the casing installed in the casing is removed and recovered, and the finished reinforcement block 100 is installed at that position.

After the completion of the above-mentioned construction, the same method is applied to the reinforced earth retaining wall at the other site where the sagging, subsidence, breakage, In the case of the reinforced earth retaining wall 1 which is not generated from the middle portion but has a sagging from the middle, the method of the present invention can be similarly applied by treating the middle portion as the lowermost stage (first stage).

In the case where the length of the portion where the sagging occurs is long, the method of the present invention is applied in the same way. However, since the number of the intermediate supports 120, which can support the loop facility 2, 2) can be installed, and it is possible to work more than the top (two stages).

S10; The bottom of the bottom (1st stage) reinforced earth retaining wall horizontal part is crushed, and the perforation,
S20; Support beam and beam supporting beam for supporting beam and retaining steel beam, girder beam installation for beam beam and PC beam strand tensioning at the center,
S30; Block fracture of vertical heat and cement grouting step of reinforced earth retaining wall where the sagging occurred on both sides,
S40; Internal excavation and foundation foundation, Soil nail anchor construction stage at the closing surface,
S50; Reinforcing soil blocks and connection to soil nail anchor and fiber reinforcement band, backfilling of soil cement backfill,
S60; The upper (second stage) reinforced earth retaining wall horizontal block is broken, and the steps S10, S50,
S70; Finishing steps to remove loops and support facilities
One; Reinforced earth retaining wall 2; Loop facility
3; Support facility 4; Ground reinforcement
100; Reinforced soil block 101; Casing notes
101 'a main beam 101a fitted in the casing; Guider 102; Earth retaining river 102a; Guider
103; A beam 103a; Crossbow
103b; Cross bar support bracket 104; Sarjibo
104a; A limb bearing 104b; Limb brace bracket
105; PC Strand (PC steel bar) 106; Support beam
108; 'X' bracing 110; Cement grouting 111; A sole nail anchor 111a; Stud
112; Hook 113; Pin reinforcement 113a; cloth tool 114; Solidified soil
115; Deep steel bars 115a; Deep section
115b; A deep hanger 116; A bundle 116a; A bundle mounting hole 117; Fiber reinforcement band 117a; Band binding 118; Incision surface 119; Nut 120; Intermediate support

Claims

In the restoration construction method and structure of the reinforced earth retaining wall 1,
A step of crushing a block of the lowermost (first-stage) reinforced-earth retaining wall horizontal part heat-inserting step (S10) of perforating, sanding and earth-
The support beam supporting the main beam and the retained steel beam, installing the beams, installing the beam support beams and tensioning the PC strand at the central portion (S20)
A block fracture of vertical heat, a cement grouting step (S30) of the reinforced earth retaining wall where the sagging occurred on both side portions,
An inner excavation, a root canal arrangement, a soil nail anchor construction step (S40)
The reinforcing soil block and the connection between the soil nail anchor and the fiber reinforcement band, the back side cement backing step (S50)
The step of repeating the construction from step S10 to step S50 and the step of recovering the earth retaining steel (step S60)
And a finishing step (S70) of removing a roof, a supporting structure, and the like.

The method according to claim 1,
The main beam 101 of the casing used in the present invention is horizontally perforated and is embedded by inserting the main beam 101, which is a steel pipe of the casing, into the perforation hole and blows it, and a smaller steel pipe is inserted into the casing of the casing, The casing casing 101 is buried in the future and only the casing 101 'that is sandwiched by the casing is recovered.
The L-shaped steel is welded to the left and right sides of the casing washer 101 to serve as a guider 101a of the earth retaining steel 102,
The earth retaining steel pipe 102 is disposed between one of the main beams 101 and the adjacent main beam 101 so as to be press-fitted in a concavo-convex shape. When the earth retaining steel 102 is press- The one side flange of the concave type earth retaining steel pipe 102 which pushes and pushes along the guider 101a of the bearing 101 acts as a guider 102a of the convex type earth retaining steel 102 (2) Construction and restoration method of reinforced earth retaining wall constituting loop facility (2)

The method of claim 1,
A supporting beam 106 supporting the loop facility 2 formed by the annulus 101 and the retaining steel 102 is vertically installed on both sides of the loop facility 2 so as to be connected to the beam 103 in a lattice pattern, A barrel support 103a is provided at a position where the bar 103 and the support bar 106 are connected to each other and the bar support bracket 104b supporting the bar support 103b is fixed to the support bar 106,
In order to install a facility for reducing the staple and a facility for reducing the stamina by reinforcing the center portion, the cross beam 103 is provided at a position on the upper side of the supporting beam 106, And a limb beam 104 connecting the cross beam 103 and the limb support 104a is provided on the support beam 106 and the limb support bracket 104b is fixed to the support beam 106 And an X-bracing 108 for connecting the support beams 106 is provided to secure the support beams 106 and the springs 101 to prevent the support beams 106 from being shaken, The center portion is provided with a PC stranded wire 105 protruding from the lower flange of the beam 103 and tightly fixed thereto to reinforce the rigidity of the beam 103 so that the method of restoring the reinforced earth retaining wall constituting the supporting structure 3 rescue

The method of claim 1,
The reinforcing soil block 100 in the bottom vertical portion of the reinforced earth retaining wall 1 having been subjected to the sagging is crushed using a gradual method such as a horizontal portion and ground reinforcement is performed using cement grouting 110 to prevent collapse 4). In the ground reinforcement (4), a plurality of holes are drilled so that the grouting can be evenly spread in the horizontal and vertical directions. The grouting reinforcement (4) is gradually infiltrated from the upper side to the lower side,
In the crushing of the reinforcing soil block 100 for the cement grouting 110, not all of the necessary parts are removed at once, but the reinforcing soil block 100 on the upper side is first crushed and ground reinforcement 4 is carried out in that order Restoration construction method and structure of reinforced earth retaining wall to be carried gradually and gradually while moving downward

The method according to claim 1,
In the present invention, the hanger 112 using the d-shaped steel is installed on the head of the soil nail anchor 111, and the head of the soil nail anchor 111 is fastened by the nut 119,
The hanger 112 using the c-shaped steel sheet installed on the head of the soil nail anchor 111 needs a facility to bind the fiber reinforcement band 117. A fiber reinforcing material 112 is attached to the abdomen of the hanger 112 using the c- And a plurality of pin reinforcing bars 113 which are capable of binding the fiber reinforcing bands 117 behind the plurality of cut surfaces 118 are formed into a plurality of I- The stud tool 111a is inserted into the upper and lower sides of the hook 112 by means of the section steel and is fixed by circumferential welding and the stud 111a of the sole nailing anchor 111 is screw- (111) of Soil Nailing Anchor (111) to ensure resistance that will not be pulled out of the action area.

The method according to claim 1,
The core block 115a and the core block 115b are drilled in advance in the reinforcement block 100 so that the upper and lower reinforcing blocks 100 can be vertically bundled in advance when stacking the reinforcing block 100 to be restored in a staggered manner, 115a so that the upper and lower reinforcing soil blocks 100 are integrally bound with each other so as not to fall through the deep hanger 115b. At this time, when the reinforcing soil blocks 100 are stacked, a bundling iron mounting hole 116a is formed in a portion where the reinforcing soil blocks 100 are abutted against each other so that the bundling iron 116 can be installed, So that it can be inserted. The reinforcing soil block 100 is stacked while the bundling rods 116 are installed between the bundling rods mounting holes 116a installed in such a manner that the binding rods 116 and the hooks 112 of the sole nail anchor 111 head Of the reinforcing soil block (117) by band binding (117a) with the fiber reinforcing material band (117) to pull the reinforced soil block (100) so as not to be pushed by the earth pressure.

The method according to claim 1,
The two-band binding method, which is a method of bundling with a fiber reinforcement band 117, is constituted by designating a 'V' type binding method in which two binding screws 116 are bound to one hook 112, The fiber reinforcing band 117 is wound around the pin reinforcing bar 113 by rotating the pin reinforcing bar 113 one turn through the cutout surface 112 of the hook 112 and then the fiber reinforcing band 117 The hooks 112 are bound to the plurality of bundling rods 116 by the binding method. However, this is because the earth pressure according to the height of the reinforcing earth retaining wall 1 The number of the portions for binding the fiber reinforcing material band 117 to the hook 112 can be changed according to the influence of the impact.
Backfilling after band binding After backfilling by using the soil cement method or using the modified soil to which the solidified soil 114 is added, the effect of compaction is obtained by water compaction of the soil cement 111 or compaction of the laminate by the modified soil And the solidified soil 114 is filled in the gap formed between the lower surface of the roof structure 2 and the uppermost reinforcing soil block 100 at the uppermost stage to form a loop Restoration construction method and structure of reinforced earth retaining wall reinforcing facility (2)

The method according to claim 1,
The facility at the upper end (the second end) includes all of the loop facilities 2 that were installed at the lowermost end (the first end) to extend the bottom support beam 106 to support the loop facility 2 The support facility 3 must be installed repeatedly at the upper end (second stage), and the lowermost (first stage) loop facility 2 is exposed at the upper (second stage) In the loop facility (2), the earth retaining steel (102) is constructed by dismantling at this time,
At this time, the reinforcing soil block 100, which is in contact with the casing main beam 101 and the installation position of the main beam 101 'sandwiched between the casing 101 and the casing 101, The main beam 101 'sandwiched in the casing is removed in step S70 and then installed. In addition, stacking of the reinforced soil block 100 to be restored at the upper end (second end) and backfill backing are also carried out in the same manner And restoration construction method of reinforcement soil retaining wall composed of repeated construction