Reinforcement structure and method for masonry walls, and tubular reinforcing members

Abstract

To provide a reinforcement structure and a reinforcement method of a masonry wall and a tubular reinforcement member which can prevent collapse of the masonry wall while keeping an original drainage function of a cobble stone layer, by improving pulling-out resistance by means other than solidification means and by solidifying a part other than the cobble stone layer.SOLUTION: In a reinforcement structure of a masonry wall 20 comprising a natural ground layer 23 behind a stone layer 21 via a cobble stone layer 22, a tubular reinforcement member 10 is positioned behind the stone layer 21, and pulling-out resistant portions 11R, 12R are formed in the stone layer 21 and the natural ground layer 23. The pulling-out resistant portions 11R, 12R are formed of a diameter-expansion mechanism 11 provided in the tubular reinforcement member 10 and / or a solidification material (not shown) discharged from the tubular reinforcement member 10. The tubular reinforcement member 10 is formed to have a hollow multi pipe structure (for example, a hollow double pipe structure comprising a short outer pipe 1 and a long inner pipe 2).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention belongs to the technical field of reinforcement structures and methods for masonry walls, and tubular reinforcement members. [Background technology]

[0002] In a masonry wall consisting of a masonry layer, a backfill chestnut stone layer (hereinafter referred to as the "chestnut stone layer"), and a natural ground layer (also called the fixed layer), when the chestnut stone layer sinks due to external forces from an earthquake or water pressure from heavy rain, a force acts from behind the masonry layer in a direction that pushes the masonry stones (intermediate stones), and the masonry layer is no longer able to withstand this force, leading to collapse. Taking this collapse mechanism into consideration, for example, the conventional reinforcement techniques for masonry walls disclosed in Patent Documents 1 and 2 aim to prevent the cobblestone layer from subsiding by drilling holes from the surface of the masonry layer toward the natural ground and injecting grout into the drilled holes, or by inserting reinforcing members and injecting grout to solidify the cobblestone layer, thereby reinforcing the wall.

[0003] However, if the chestnut stone layer is allowed to solidify, it will reduce the drainage function of rainwater and groundwater from the natural ground layer that is expected of the chestnut stone layer, and there is a concern that a new problem will arise in that the increased water pressure behind the stone layer will make the stone layer (intermediate stones) unable to withstand the water pressure, leading to the collapse of the masonry wall. Furthermore, in the past, the means of fixing reinforcing members (mainly steel bars) to the ground layer was to inject a solidifying material such as grout into the gap between the reinforcing members and the ground layer to fix them in place. However, when the ground layer itself is highly leaky, or when there is a layer with large voids such as a cobblestone layer adjacent to the ground layer, as in a masonry wall, there is an issue of insufficient filling of the solidifying material, resulting in insufficient pull-out resistance of the reinforcing members, and there is a limit to how much pull-out resistance the reinforcing members can withstand using only the solidifying material. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-9209 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-283309 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the present invention was devised in consideration of the problems of the background art described above, and its purpose is to provide a reinforcement structure and reinforcement method for stone walls, as well as a tubular reinforcement member, which are easy to install, reliable, safe, and of high quality, and which can prevent the collapse of the stone wall while maintaining the original drainage function of the cobblestone layer by increasing pull-out resistance using means other than the solidification means, or by solidifying parts other than the cobblestone layer (the building stone layer, the natural ground layer). [Means for solving the problem]

[0006] As a means for solving the above problems, the reinforcement structure of a masonry wall according to the invention described in claim 1 is a reinforcement structure of a masonry wall having a natural ground layer behind a stone layer with a granite layer interposed therebetween, A tubular reinforcing member is positioned behind the stone layer, and a pull-out resistance portion is formed in the stone layer and the natural ground layer except for the cobblestone layer, and the cobblestone layer is not altered. The pull-out resistance portion is formed by a diameter expansion mechanism provided in the tubular reinforcing member and / or by a solidification material discharged from the tubular reinforcing member. , and The pull-out resistance portion formed in the stone layer among the pull-out resistance portions is provided at the boundary between adjacent gap stones forming the stone layer and the cobblestone layer, thereby fixing the adjacent gap stones to each other. It is characterized by:

[0008] Claim 2 The tubular reinforcing member according to the invention described in claim 1 to A tubular reinforcing member used in the reinforcing structure of the masonry wall described above, wherein the tubular reinforcing member is provided with an expanding mechanism that expands its diameter at the masonry layer. outside Equipped with a diameter expansion mechanism that expands the diameter between the pipe and the ground layer The inner tube is longer than the outer tube tube and combination Ta Hollow with different outer diameters two Heavy-duty pipe structure The outer tube is configured to follow the movement of the inner tube, and the diameter-expanding mechanism is configured to arrange a plurality of linear slits whose longitudinal direction is arranged in the tube axis direction in the circumferential direction of the tube axis, so that the area between adjacent linear slits in the circumferential direction can expand radially as viewed from the tube axis direction to expand the diameter.It is characterized by:

[0010] Claim 3 The invention described in claim 2 In the tubular reinforcing member described above, the inner pipe is characterized in that it is provided with a discharge section for discharging the solidification material to the areas corresponding to the stone layer and the natural ground layer.

[0011] Claim 4 The method for reinforcing a masonry wall according to the invention described in claim 2 or 3 a step of inserting the tubular reinforcing member according to claim 1 into the masonry layer and pushing the tubular reinforcing member until the inner pipe penetrates the cobblestone layer and reaches the natural ground layer; A step of attaching a short tension rod to the base end of the inner pipe, and pulling the short tension rod toward the front side to expand the diameter of the outer pipe expansion mechanism that follows the movement of the inner pipe at the masonry layer; After removing the short tension rod from the inner pipe, a long tension rod is attached to the inner end of the inner pipe, and the long tension rod is pulled toward the front to expand the diameter of the inner pipe's diameter expansion mechanism in the natural ground layer.

[0012] Claim 5 The invention described in claim 4 In the reinforcement method for masonry walls described above, a solidifying material is injected into the masonry layer and / or the ground layer through the inner pipe, thereby forming a solidifying reinforcement body on the outer periphery of the tubular reinforcing member in the masonry layer and / or the ground layer. [Effects of the Invention]

[0013] The reinforcement structure and reinforcement method for a masonry wall and the tubular reinforcement member according to the present invention have the following advantages. (1) By mechanically expanding the diameter of the expansion mechanism provided in the tubular reinforcing member, it is possible to quickly and reliably form a pull-out resistance section in the masonry layer and the natural ground layer, eliminating concerns about insufficient pull-out resistance due to insufficient injection volume with conventional fluid grout materials. Therefore, it is possible to realize a reinforced masonry wall structure that is not only easy to install and reliable, but also has excellent seismic functionality, safety, and quality immediately after construction. (2) Since this can be done without modifying the cobblestone layer, the drainage function of the cobblestone layer is not impaired. Therefore, it is possible to realize a reinforced masonry wall structure with superior seismic functionality, safety, and quality. (3) The pull-out resistance section can be configured with two types of reinforcing means, the diameter expansion mechanism and the solidification material, and the cooperation of these two types of reinforcing means makes it possible to form a pull-out resistance section (solidification reinforcement) with even greater strength and rigidity than when implemented using only conventional solidification means. This makes it possible to realize a reinforced structure for masonry walls that is extremely superior in seismic functionality, safety, and quality. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an explanatory diagram showing a schematic construction status of a masonry wall reinforcement method according to the present invention. [Figure 2] FIG. 2 is a front view (left side view) of FIG. [Figure 3] 1 is an explanatory diagram illustrating a reinforcement method and a reinforcement structure for a masonry wall according to the present invention. [Figure 4] FIG. 4 is a front view (left side view) of FIG. 3. [Figure 5] 1A to 1D are explanatory diagrams showing the construction status of the masonry wall reinforcement method according to the present invention in stages. [Figure 6] 1A to 1C are explanatory diagrams showing the construction steps of the masonry wall reinforcement method according to the present invention. [Figure 7] 5B is an enlarged view of a portion S of the tubular reinforcing member shown in FIG. 5A. FIG. [Figure 8] 5B is an enlarged view of a T portion of the tubular reinforcing member shown in FIG. 5A. FIG. [Figure 9]5B is an enlarged view of a U-section of the tubular reinforcing member shown in FIG. 5A. FIG. [Figure 10] FIG. 5C is an enlarged view of a V portion of the tubular reinforcing member shown in FIG. 5B. [Figure 11] FIG. 5D is an enlarged view of a portion W of the tubular reinforcing member shown in FIG. 5C. [Figure 12] 5D is an enlarged view of the X portion of the tubular reinforcing member shown in FIG. 5C. [Figure 13] 6B is an enlarged view of a portion Y of the tubular reinforcing member shown in FIG. 6A. FIG. [Figure 14] 1 is an explanatory diagram showing a variation of a reinforcement method and a reinforcement structure for a masonry wall according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] Next, a reinforcement structure and a reinforcement method for a masonry wall, and a tubular reinforcement member according to the present invention will be described with reference to the drawings. [Example]

[0016] 1 to 13 show an embodiment of a reinforcement method and structure for a masonry wall 20 and a reinforcement member 10 according to the present invention. The reinforcing structure of this masonry wall 20 comprises a bedrock layer 23 behind a masonry layer 21 with a cobblestone layer 22 in between, and a tubular reinforcing member 10 is positioned behind the masonry layer (intermediate stone) 21, with pull-out resistance portions 11R, 12R formed in the masonry layer 21 and the bedrock layer 23 (see Figure 3). In other words, the present invention is implemented without modifying the cobblestone layer 22, such as by not providing pull-out resistance portions 11R, 12R in the cobblestone layer 22, and therefore the original drainage function of the cobblestone layer 22 is not impaired.

[0017] In this embodiment, the pull-out resistance portions 11R, 12R are formed by diameter expansion mechanisms 11, 12 provided in the tubular reinforcing member 10 and a solidifying material (not shown) discharged and diffused from the tubular reinforcing member 10. That is, the pull-out resistance portions 11R, 12R according to this embodiment are implemented by adopting two types of reinforcing means, namely, the diameter expansion mechanisms 11, 12 and the solidifying material, but even if the pull-out resistance portions 11R, 12R are formed by using either one of the two types of reinforcing means, a corresponding effect (pull-out resistance force) can be obtained.

[0018] The tubular reinforcing member 10 is formed into a hollow double-pipe structure consisting of a short outer pipe 1 and a long inner pipe 2, the outer pipe 1 is equipped with an expansion mechanism 11 that expands its diameter in the masonry layer 21, the inner pipe 2 is equipped with an expansion mechanism 12 that expands its diameter in the natural ground layer 23, and the outer pipe 1 is configured to follow the movement of the inner pipe 2. In this embodiment, merely by way of example, the outer pipe 1 is made of a plated steel pipe having an outer diameter of approximately 23 mm, a wall thickness of approximately 3 mm, and a length (axial length) of approximately 300 mm. The inner pipe 2 is made of a plated steel pipe having an outer diameter of approximately 17 mm, a wall thickness of approximately 3 mm, and a length of approximately 2000 mm. The outer pipe 1 is fitted tightly around the inner pipe 2, i.e., the inner diameter surface of the outer pipe 1 and the outer diameter surface of the inner pipe 2 are in contact with each other with almost no gap between them. Furthermore, as shown in FIGS. 7 and 8 , the outer pipe 1 is integrated with the inner pipe 2 by welding 13 without aligning their base ends (see symbol H). While symbol H is 20 mm in this embodiment, this is not limited to this and can be modified as appropriate depending on the structural design of the diameter expansion mechanisms 11 and 12 or the configuration of the pull-out resistance portions 11R and 12R to be formed. The welding means 13 is not limited to this, and can be configured to follow (move in tandem with) the movement of the outer pipe 1 in one direction of the inner pipe 2, and can similarly be implemented using a bolt joint means or a hooking means such as a protruding portion (flange portion).

[0019] The inner tube 2 has a pointed tip (see FIG. 9), and female threads 2a and 2b are formed at the base and inner ends, respectively, for attaching tension rods 8 and 9, which will be described later. The female threads 2a and 2b can also be used to connect a rod (not shown) of a drilling machine. In this embodiment, the outer pipe 1 and the inner pipe 2 are made of plated steel pipes, but they are not limited to this and can also be made of stainless steel or titanium. The dimensions of the outer pipe 1 and the inner pipe 2, such as their lengths, are of course not limited to those mentioned above and can be appropriately changed in design depending on the shape of the masonry wall 20 to which the present invention is applied.

[0020] In this embodiment, the diameter expansion mechanisms 11, 12 are composed of a plurality of (four in this embodiment) linear slits 11a, 12a formed at approximately equal intervals in the circumferential direction of the tube axis, and the areas between adjacent linear slits 11a, 12a in the circumferential direction expand (rise up) radially when viewed from the axial direction of the tube, thereby forming pull-out resistance sections 11R, 12R. In this embodiment, the slits 11a provided in the outer tube 1 are, by way of example only, 80 mm long and the bent portions (three locations at both ends and the center) are formed as round holes 11b, so that when viewed from the direction of Figure 5C, the slits 11a expand in the shape of an isosceles triangle. In this embodiment, the slits 12a provided in the inner tube 2 are, by way of example only, 200 mm long and the bent portions (both ends and three portions to the left of the center) are formed as round holes 12b, so that when viewed from the direction of Figure 6B, the slits 12a expand in the shape of a right triangle, which is larger than the expanded diameter dimension of the outer tube 1. The configuration (size, shape) of the pull-out resistance portions 11R, 12R is not limited to the illustrated example. For example, the expanded diameter dimensions 11W, 12W (see FIG. 6C) of the pull-out resistance portions 11R, 12R in this embodiment are 80 mm and 150 mm, respectively, but these can be appropriately changed depending on the structural design. In addition, reinforcing ribs can be provided around the slits 11a, 12a to increase the strength and rigidity of the pipe itself, as appropriate.

[0021] In this embodiment, the pull-out resistance portions 11R, 12R are configured to incorporate a reinforcing means for discharging (injecting) the solidification material in addition to the reinforcing means of the diameter expansion mechanisms 11, 12. In order to implement the reinforcing means for discharging the solidification material, in this embodiment, the inner pipe 2 is provided with discharge portions (discharge means) for discharging the solidification material at the portions corresponding to the stone layer 21 and the natural ground layer 23, respectively. Specifically, as shown in Figures 5C and 12, the discharge section that discharges into the masonry layer 21 comprises, for example, a plurality of discharge holes 2c of about φ5 to 8 m drilled at the base end of the inner pipe 2 in a configuration that connects the inside and outside of the inner pipe 2, and the solidification material injected into the hollow part of the inner pipe 2 is discharged through the discharge holes 2c of the inner pipe 2 using the diameter expansion mechanism 11. The diameter, spacing and number of the discharge holes 2c can be appropriately changed depending on the structural design. On the other hand, in this embodiment, no special discharge section is provided for discharging into the natural ground layer 23, and the solidification material injected into the hollow portion of the inner pipe 2 is discharged using the diameter expansion mechanism 12 that expands the diameter at the inner end of the inner pipe 2.

[0022] Thus, the solidification material discharged and diffused using the expansion mechanisms 11, 12 solidifies around the masonry layer 21 and around the natural ground layer 23 of the tubular reinforcing member 10, respectively, to form massive solidified reinforcements, and ultimately the pull-out resistance sections 11R, 12R.The resistance force due to the wedge (anchor) effect of the pull-out resistance sections 11R, 12R eliminates concerns about insufficient pull-out resistance due to insufficient injection volume with conventional fluid grout materials, and makes it possible to realize a reinforcement structure for masonry walls that is excellent in seismic functionality, safety, and quality.

[0023] Next, a method for reinforcing the masonry wall 20 according to the present invention will be described. The reinforcement method for this masonry wall 20 involves inserting a tubular reinforcing member 10, consisting of the outer pipe 1 and inner pipe 2, into the masonry layer 21 and forcing the inner pipe 2 through the cobblestone layer 22 until it reaches the natural ground layer 23 (see Figures 1 and 2). This forcing is accomplished by connecting a rod with a male thread at its tip to the female thread 2a at the base end of the inner pipe 2 (not shown), and applying a driving force via the rod using a drilling machine such as a drifter that applies impacts while rotating. In this example, the rod is driven into the natural ground layer (anchoring layer) 23 at a slight downward angle (e.g., about 5 to 10 degrees) from the horizontal. Alternatively, holes may be drilled using a drilling machine before inserting the tubular reinforcing member 10 into the masonry layer 21. In this embodiment, taking into consideration the good flow of the solidification material, the material is poured into the ground layer 23 at a slight downward slope in the horizontal direction, but this is not limited to this and the material can also be poured horizontally. Then, after the tubular reinforcing member 10 is pushed (driven) into a predetermined position, the rod is removed from the inner tube 2 and withdrawn (see FIG. 5A).

[0024] 5B and 10, a short tension rod 8 is screwed into the female threaded portion 2a at the base end of the inner pipe 2. After the short tension rod 8 is attached, a coupler 25 is screwed into the base end of the short tension rod 8, and a center shaft 26 is screwed into the coupler 25, thereby positioning the tension jack 24 against the surface of the masonry wall 20 (stone layer 21).

[0025] Next, as shown in stages from Figure 5B to Figure 5C, the center shaft 26, and therefore the short tension rod 8, is pulled toward the user using the reaction force from the surface of the masonry wall 20, and as a result, the inner pipe 2 connected to the short tension rod 8 moves (symbol H = 20 mm) until it hits the tension jack 24, as shown in stages from Figure 10 to Figure 11. Then, the outer pipe 1, which is configured to follow the movement of the inner pipe 2, pulls its tip end (see Figure 8) toward the user while its base end remains in contact with the tension jack 24 (see Figure 10), causing a buckling action to occur around the round hole 11b near the center of the slit 11a of the diameter expansion mechanism 11. As a result, as shown in Figure 5C (Figure 12), the diameter expansion mechanism 11 (slit 11a) formed in the outer pipe 1 expands radially at the masonry layer 21 to expand in diameter.

[0026] Next, as shown in Figure 5D, the short tension rod 8 is removed from the base end of the inner pipe 2 and then, as shown in Figures 6A and 13, a long tension rod 9 is screwed into the female threaded portion 2b at the back end of the inner pipe 2 to connect it. After the long tension rod 9 is attached, a coupler 25 is screwed into the base end of the long tension rod 9, and a center shaft 26 is screwed into the coupler 25, thereby positioning the tension jack 24 against the surface of the masonry wall 20 (stone layer 21).

[0027] Next, as shown in stages from Figure 6A to Figure 6B, by pulling the center shaft 26 and therefore the long tension rod 9 toward the front using the reaction force from the surface of the masonry wall 20, the base end of the inner pipe 2 remains in contact with the tension jack 24 (see Figure 11), and the tip end is pulled toward the front. This causes a buckling action to occur around the round hole 12b near the left center of the slit 12a of the diameter expansion mechanism 12, and as a result, as shown in Figure 6B, the diameter expansion mechanism 12 (slit 12a) formed in the inner pipe 2 expands radially at the natural ground layer 23, expanding its diameter. The degree of expansion of the pull-out resistance portions 11R and 12R formed on the outer pipe 1 and the inner pipe 2, respectively, can be controlled by the stroke amount of the tension jack 24. Thereafter, the long tension rod 9 is removed from the inner tube 2 and withdrawn (see FIG. 6C).

[0028] In this embodiment, a solidification material is then injected into the hollow portion of the inner pipe 2, and is discharged and diffused through the hollow portion into the masonry layer 21 and the natural ground layer 23, respectively, to form solidification reinforcement bodies (pull-out resistance portions 11R, 12R) on the outer periphery of the tubular reinforcing member 10 in the masonry layer 21 and the natural ground layer 23. Specifically, in this embodiment, a solidification material (e.g., cement milk, inorganic solidification material) is discharged and diffused through the hollow portion of the inner pipe 2 into the natural ground layer 23 at its inner end, and then a solidification material (e.g., urethane) is discharged and diffused from the diameter expansion mechanism 11 of the outer pipe 1 into the masonry layer 21 through the discharge hole 2c provided on the base end side of the inner pipe 2, thereby fixing adjacent masonry stones (intermediate stones) on all four sides to each other. Thus, it is possible to form massive solidified reinforcement bodies (pull-out resistance portions 11R, 12R) having the required strength and rigidity in the natural ground layer 23 and the masonry layer 21, respectively, without modifying the cobblestone layer 22. In addition, when injecting the solidification material, appropriate measures may be taken, such as using an insert packer equipped with an injection tube or a check valve packer.

[0029] Thereafter, a pressure plate (fixing plate) 19 is joined to the protruding portion of the base end of the reinforcing member 10 by means of bolts 18 (see FIG. 3) or welding or other joining means, thereby supporting the masonry wall 20. Specifically, when joining using the bolts 18, the bolts 18 are screwed into the female threaded portion 2a at the base end of the inner pipe 2 to connect them, and the connected bolts 18 are passed through the pressure plate 19 (holes formed in the center of the pressure plate 19), and then a nut is screwed in to fasten and join them. When fixing the pressure plate 19, appropriate measures can be taken, such as stretching a covering net that covers the surface of the masonry wall 20 using steel wire, wire rope, or resin material. Then, the construction process described in paragraphs

[0023] to

[0028] above is repeated according to the number of reinforcing members 10 to be cast (12 in a roughly staggered arrangement in the illustrated example), thereby completing the reinforcement method for the masonry wall 20.

[0030] Although the embodiments have been described above based on the drawings, it should be noted that the present invention is not limited to the illustrated examples and includes the range of design modifications and application variations that would normally be made by a person skilled in the art, provided that they do not deviate from the technical concept of the present invention.

[0031] For example, in the examples shown in Figures 1 to 13, the tubular reinforcing member 10 is formed as a hollow double-pipe structure consisting of two single pipes, one short outer pipe 1 and one long inner pipe 2, and has two pull-out resistance portions 11R and 12R, one in the masonry layer 21 and one in the natural ground layer 23, respectively. However, the scope of the present invention is not limited to this. The tubular reinforcing member 10 can also be formed as a hollow multi-pipe structure with different outer diameters by combining two or more single pipes, one with a diameter expansion mechanism that expands its diameter in the masonry layer 21 and one with a diameter expansion mechanism that expands its diameter in the natural ground layer 23. Specifically, Figure 14 schematically shows an example of a tubular reinforcing member 10' formed as a hollow triple-pipe structure with different outer diameters by combining three single pipes, one with a diameter expansion mechanism that expands its diameter in the masonry layer 21 and two with diameter expansion mechanisms that expand its diameter in the natural ground layer 23. The diameter of the tubular reinforcing member 10' having this hollow triple-tube structure is gradually expanded in accordance with the method for expanding the diameter of the tubular reinforcing member 10 having the hollow double-tube structure shown in FIGS. 1 to 13, which has already been described. That is, for example, if the three single pipes are referred to as the inner pipe, middle pipe, and outer pipe, from the inside to the outside, the outer pipe follows the movement of the middle pipe, and the middle pipe follows the movement of the inner pipe, and first a short tension rod is screwed into the female threaded portion at the base end of the middle pipe and pulled toward the front, thereby expanding the diameter of the expansion mechanism formed in the outer pipe in the masonry layer 21, next a short tension rod is screwed into the female threaded portion at the base end of the inner pipe and pulled toward the front, thereby expanding the diameter of the expansion mechanism formed in the middle pipe in the natural ground layer 23, and next a long tension rod is screwed into the female threaded portion at the back end of the inner pipe and pulled toward the front, thereby expanding the diameter of the expansion mechanism formed in the inner pipe in the natural ground layer 23. In comparison with the embodiments shown in FIGS. 1 to 13, the embodiment shown in FIG. 14 allows two pull-out resistance portions 12R to be formed using only the natural ground layer 23, and therefore has the effect of dramatically increasing the pull-out resistance in cases where the natural ground layer 23 is weak and a single pull-out resistance portion 12R (see FIG. 3) is not (or is unlikely to be) able to ensure a predetermined pull-out resistance. It should be noted that the tubular reinforcing member 10' shown in Figure 14 is implemented as a hollow triple-tube structure, but is not limited to this and can also be implemented as a hollow quadruple or more tube structure, and depending on the structure, it can also be implemented by forming three or more pull-out resistance sections 12R in the ground layer 23.

[0032] In addition, the inner pipe 2 constituting the reinforcing member 10 may be a single piece, or may be a combination of pipe materials with threaded ends connected together by a coupler.

[0033] Although the present embodiment has been described above with a focus on the masonry wall 20, it should be noted that the present invention is also applicable to stone walls. [Explanation of symbols]

[0034] 1 outer tube 2 Inner tube 2a Female thread 2b Female thread 2c Discharge part (discharge hole) 8 Short tension rod 9 Long tension rod 10 Tubular reinforcing member (hollow double tube structure) 10' Tubular reinforcing member (hollow triple tube structure) 11 Diameter expansion mechanism 11a Slit 11b Round hole 11R Pull-out resistance part 12 Diameter expansion mechanism 12a Slit 12b Round hole 12R Pull-out resistance part 13 Welding methods 18 volts 19 Pressure plate 20 Stone Wall 21 Building stone layer 22 Kuriishi Formation 23 Geological Layer 24 Tension Jack 25 coupler 26 Center shaft

Claims

1. A reinforcement structure for a masonry wall with a natural ground layer behind a stone layer through a chestnut stone layer, A tubular reinforcing member is positioned behind the stone layer, and a pull-out resistance portion is formed in the stone layer and the natural ground layer except for the cobblestone layer, and the cobblestone layer is not altered. The pull-out resistance portion is formed by a diameter expansion mechanism provided in the tubular reinforcing member and / or a solidification material discharged from the tubular reinforcing member; and A reinforcement structure for a masonry wall, characterized in that the pull-out resistance portions formed in the masonry layer among the pull-out resistance portions are provided at the boundary between adjacent gap stones that form the masonry layer and the cobblestone layer, thereby fixing the adjacent gap stones to each other.

2. 2. A tubular reinforcing member used in a reinforcing structure for a masonry wall according to claim 1, characterized in that the tubular reinforcing member is formed as a hollow double-tube structure with different outer diameters, combining an outer tube equipped with an expansion mechanism that expands its diameter in the masonry layer and an inner tube that is longer than the outer tube and has an expansion mechanism that expands its diameter in the natural ground layer, the outer tube being configured to follow the movement of the inner tube, and the expansion mechanism having a structure in which multiple linear slits whose longitudinal direction is arranged in the axial direction of the tube are arranged circumferentially about the tube axis, so that the areas between adjacent linear slits in the circumferential direction can expand in diameter by radially expanding when viewed from the axial direction of the tube.

3. 3. The tubular reinforcing member according to claim 2, wherein the inner pipe is provided with a discharge portion for discharging the solidifying material at a portion corresponding to the stone layer and the natural ground layer.

4. a step of inserting the tubular reinforcing member according to claim 2 or 3 into a masonry layer and pushing the tubular reinforcing member until the inner pipe penetrates the cobblestone layer and reaches the natural ground layer; A step of attaching a short tension rod to the base end of the inner pipe, and pulling the short tension rod toward the front side to expand the diameter of the outer pipe expansion mechanism that follows the movement of the inner pipe at the masonry layer; a step of removing the short tension rod from the inner pipe, attaching a long tension rod to the inner end of the inner pipe, and pulling the long tension rod toward the front to expand the diameter of the inner pipe's diameter expansion mechanism at the natural ground layer.

5. A reinforcement method for masonry walls as described in claim 4, characterized in that a solidifying material is injected into the stone layer and / or the ground layer through the inner pipe to form a solidifying reinforcement body around the outer periphery of the tubular reinforcing member in the stone layer and / or the ground layer.

Images