JP2018178646A - Reinforcement structure and reinforcement method of masonry structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement structure and a reinforcement method of a masonry structure which can appropriately fix a lower end of a tension material without digging a ground surface or with a small digging amount.SOLUTION: A reinforcement structure 10 of a masonry structure 12 has: a horizontal hole 20 formed in a side face of a masonry structure wall 18; a through hole 24 which is formed downward from a wall upper end 22 and communicates with the horizontal hole 20; a tension material fixation hole 26 which is formed below the through hole 24 and to extend further downward from the horizontal hole 20; and a tension material 28 extending from the wall upper end 22 to the tension material fixation hole 26. The tension material 28 has a lower end fixed to the structure in the tension material fixation hole 26 together with an anchor plate 32 with a filler, and has an upper portion fixed thereto in a state where a tension is applied thereto.SELECTED DRAWING: Figure 1

Description

  The present invention relates to, for example, a reinforcing structure and a reinforcing method of a masonry structure formed by assembling a brick, a concrete block, and a stone.

  The structure formed by building bricks, concrete blocks and stones is called masonry. A large number of Western-style brick masonry are built from the Meiji to the early Showa era, and at the same time its cultural value is increasing, it is also valuable as a tourist resource and preservation is sought.

  As illustrated as part of FIG. 6, a masonry structure 500 is provided on the existing concrete foundation 502 in the ground and has a brick root area 504 and a masonry wall 505. The root area 504 is formed wider than the masonry wall 505 and may be provided in the ground. In FIG. 6, the masonry construction wall 505 extends in a direction perpendicular to the paper surface, and one of the left and right sides is the outdoor side, and the other is the indoor side. In addition, in the masonry structure 500 and the concrete foundation 502, in order to avoid that a drawing becomes complicated, cross-sectional hatching is abbreviate | omitted, and the same may be said of the corresponding element in other figures mentioned later.

  Such an old masonry construction can not necessarily be said to have sufficient strength in view of the current seismic resistance standards, and there is a reinforcement method that greatly reduces its value as a cultural asset on the appearance, although it needs some reinforcement. Not desirable. In addition, in the future, reversibility may be required to remove the reinforcing member and return it to its original state.

  Therefore, Patent Document 1 proposes a method as shown in FIG. That is, the working area 506 in a region that exposes only one surface of the root area 504 and the concrete foundation 502 is excavated in advance from the ground, and penetrates from the upper end of the masonry building wall 505 to the lower end of the concrete foundation 502 A through hole 508 is formed, and a lateral hole 510 reaching the through hole 508 from the side surface of the concrete foundation 502 is formed. Then, the tendon 516 is inserted into the formed through hole 508, the fixing plate 520 is attached to the lower end thereof from the side hole 510, and the reinforcing spiral 522 is inserted. Since the side hole 510 is relatively deep and the workability is poor, a nut is previously attached to the tip of the tendon 516, and the through hole 508 is also set to a somewhat large diameter accordingly. Further, the fixing plate 520 is provided with a deep insertion notch so as to be easily attached to the tendon 516.

  Furthermore, after filling the side holes 510 with the filler and fixing the tendon 516 with the fixing plate 520, tension is applied by pulling the portion protruding from the upper end of the wall of the tendon 516 upward, and tension is applied to the tendon 516 It is fixed to the upper end of the wall of the masonry wall 505 in the applied state.

  In such a method, the vertical compressive force is applied as a prestress to the masonry wall 505 by the tension of the tendon 516, and the shear stress and the bending strength of the masonry wall 505 can be improved. Earthquake resistance is improved, yet the appearance is maintained.

JP, 2011-6947, A

  By the way, in the reinforcing structure and reinforcing method shown in FIG. 6 described above, it is necessary to excise the range of the work area 506 because it is necessary to form the side holes 510 in the existing concrete foundation 502. As a large-scale construction is required because of the storage and back-filling process, it is inevitable that costs will increase and the construction period will be prolonged. Since the work area 506 is relatively wide and deep, it is necessary to take measures to prevent it from falling down and measures to prevent the scattering of earth and sand dust.

  In order to drill the relatively deep horizontal holes 510, the drilling machine used becomes somewhat large, and the working area 506 must be made correspondingly wide.

  In addition, the concrete foundation 502 is important in terms of strength, and it is not preferable to form the side hole 510 in principle, and it is necessary to take measures such as installing a spiral 522 in order to restore the required strength.

  Since the horizontal hole 510 is relatively deep, it is difficult to fill the filler, and it is necessary to prevent the mixture of soil and block the opening of the horizontal hole 510 to some extent so that the filler does not leak out to the outside. It does not. Also, the curing period until the filler is sufficiently hardened can not backfill the working area 506.

  In addition, the worker is forced to work in the narrow and dark work area 506, and since the horizontal holes 510 are relatively deep, the mounting of the fixing plate 520 is an invisible inspection operation. Furthermore, if the concrete foundation 502 is an RC structure, the formation of the side holes 510 is quite difficult.

  The ground on which the old masonry structure 500 stands is likewise an old tiled structure, which may have an integral cultural value with the masonry structure 500, and that part is relatively widely excavated as a work area 506 There is also a problem with doing so, and even if it is returned to its original condition after construction, sufficient care must be taken.

  The present invention has been made in view of the above problems, and the lower end of the tendon can be appropriately fixed without digging the ground or with a small amount of digging, or the amount of drilling of the base portion is An object of the present invention is to provide a reinforcement structure and a reinforcement method of masonry structure which can be reduced.

  In order to solve the problems described above and to achieve the object, a reinforced structure of a masonry structure according to the present invention is a masonry structure or a lateral hole formed on a side of a foundation part under the masonry structure, A through hole formed downward from the upper end of the wall of the masonry wall, which is a part of the masonry structure, and communicating with the lateral hole, and formed further downward from the lateral hole below the through hole A tendon fixing hole wider than the through hole, and a tendon extending from the wall upper end to the tendon fixing hole, the lower end of the tendon in the tendon fixing hole It is characterized in that it is fixed by a filler together with a fixing member wider than the through hole, and the upper part is fixed to the upper end of the wall in a state where a tension is applied. This makes it possible to properly fix the lower end of the tendon without digging the ground or with a small amount of digging. The side holes and the through holes may be backfilled.

  When the side holes are formed in the masonry wall, excavation of the ground is not necessary, and underground work is eliminated to improve workability.

  The tendon fixing hole and the tendon can firmly fix the tendon when reaching the base portion, and can provide sufficient tension.

  Further, in order to solve the problems described above and to achieve the object, the reinforcement method for masonry structure according to the present invention is a method of forming a predetermined intersection from the aspect of a masonry structure or an underground base portion supporting the masonry structure. A lateral hole forming step of forming a lateral hole up to a point; a through hole forming step of forming a through hole communicating downward from the upper end of the wall of the masonry wall which is a part of the masonry structure to the intersection point; A tendon fixing hole forming step of forming a tendon fixing hole wider than the through hole from the intersection point further downward, inserting the tendon from the upper end of the wall to the tendon fixing hole, the lower end of the tendon Fixing member lower fixing step of fixing by a filler together with a fixing member wider than the through hole in the tendon fixing holes, tension applying step of applying tension by pulling an upper portion of the tendon upward, and The tension was applied to the tendon Tendon and upper fixing step of fixing an upper portion of the tendon to the wall upper end at state, characterized by having a. This makes it possible to properly fix the lower end of the tendon without digging the ground or with a small amount of digging.

  The through hole and the tendon fixing hole are drilled by a drilling machine, and in the through hole forming step, a first tool corresponding to the diameter of the through hole is provided at the tip of the tool shaft of the drilling machine, The first tool drills the through hole, and in the step of forming the tendon fixing hole, a second tool corresponding to the diameter of the tendon fixing hole is provided at the tip of the tool shaft, and the second tool The tendon fixing hole may be drilled, and the second tool may be provided at the tip of the tool shaft in the lateral hole. As a result, the through hole can be made smaller in diameter according to the diameter of the tendon, while the tendon fixing hole can be made larger in diameter to the extent that the fixing member is provided on the tendon.

  In the through hole forming step, after the through hole is formed by the drilling machine, a tool replacement step may be included in which the first tool is removed from the tool shaft in the lateral hole and replaced with the second tool. Thereby, it is possible to shift to the tendon fixing hole forming step without removing the tool axis of the drilling machine from the through hole after the through hole forming step.

  If at least a part of the opening of the lateral hole is shaped along the joint of the block body forming the surface of the masonry structure, the application trace of the lateral hole becomes inconspicuous.

  The adhesion strength of the filler may be increased by a hole side machining process in which the inner side surface of the tendon fixing hole is cut to roughen the surface or provide a groove.

  You may have the hole reinforcement process of providing a reinforcement in the said tendon fixing hole.

  In the reinforcement structure and reinforcement method of masonry structure according to the present invention, a transverse hole is formed in the masonry structure or the side of the foundation part under the ground supporting the masonry structure, and downward from the upper end of the masonry wall A through hole is formed, and a tendon fixing hole is further formed below the through hole. The lateral holes can be formed on the sides of the masonry structure without digging the ground compared to forming the lateral holes in the foundation, or the lower end of the tendon can be properly fixed with a smaller amount of digging. In addition, the side holes can be relatively shallow, making it easy to work in the side holes or in the side holes. Even in the case of forming a horizontal hole in the underground base portion supporting masonry, the drilling amount to the base portion may be small.

FIG. 1 is a side sectional view showing a reinforced structure of masonry structure according to the present embodiment. FIG. 2 is a partial cross-sectional perspective view showing how to replace the bit of the tool shaft from the side hole in the method of reinforcing a masonry structure according to the present embodiment. FIG. 3 is a partial cross-sectional perspective view showing the manner in which the fixing plate is attached to the tendon from the side holes in the method of reinforcing a masonry structure according to the present embodiment. FIG. 4 is a side cross-sectional view showing a reinforced structure of a masonry structure according to a first modified example of the present embodiment. FIG. 5 is a side cross-sectional view showing a reinforced structure of a masonry structure according to a second modified example of the present embodiment. FIG. 6 is a side sectional view showing a reinforced structure of masonry structure according to the prior art.

  Below, the Example of the reinforcement structure of the masonry structure concerning this invention and the reinforcement method are described in detail based on drawing. The present invention is not limited by this embodiment.

  As shown in FIG. 1, a reinforcing structure 10 according to the present embodiment reinforces a masonry structure 12. The masonry structure 12 is provided on a concrete foundation (base part) 14 below the ground 13 (that is, in the ground), and has a foundation portion 16 in the ground and almost all the masonry walls 18 on the ground. For example, bricks, concrete blocks and stones are assembled and formed.

  The root portion 16 is fixed on the concrete foundation 14 and is structured to be wider as it goes to the lower part and to disperse the weight of the upper part. The masonry construction wall 18 is fixed on the root area 16, most of which is on the ground and forms a building wall. The masonry construction wall 18 extends in a direction perpendicular to the paper surface, and one of the left and right sides is the outdoor side, and the other is the indoor side. When the masonry construction wall 18 is wide in the direction perpendicular to the paper surface, a plurality of reinforcing structures 10 are provided in accordance with the width.

  The reinforcing structure 10 of the masonry structure 12 is formed from a lateral hole 20 formed on the side surface of the masonry wall 18 at a relatively lower position, and from the upper end 22 of the masonry wall 18 downward to communicate with the lateral hole 20 And a tendon fixing hole 26 formed downward from the side hole 20 below the through hole 24 and a tendon 28 extending from the wall upper end 22 to the tendon fixing hole 26. . The through hole 24 is provided substantially at the center of the laminated wall 18 in the thickness direction (left and right direction in FIG. 1), and the tendon fixing hole 26 is provided coaxially with the through hole 24. The tendon fixing holes 26 have a larger cross-sectional area than the through holes 24 and their bottoms reach the root zone 16.

  The tensing member 28 is a high-strength PC steel rod subjected to an anticorrosion treatment, and a fixing plate (fixing member) 32 supported by a nut 30 with a washer is provided in the vicinity of the lower end. The tendon 28 may be, for example, a high tension resistant member such as a wire. The fixing plate 32 has a cross-sectional area wider than the through hole 24. The lateral hole 20 is a non-penetrating relatively shallow bottomed hole, and the opening is a degree to which the first bit 42 (see FIG. 2), the second bit 44, the fixing plate 32 (see FIG. 3) and the nut 30 can be inserted. A relatively small area of The lateral holes 20 may be provided on either the indoor side or the outdoor side depending on the conditions, but they may be provided on the indoor side when the appearance of the building is particularly important. The lateral hole 20 may be above the position where the fixing plate 32 is provided, but it is preferably provided as low as possible and the through hole 24 is set to be long.

  The through hole 24 has a small diameter, and the gap with the tendon 28 is set sufficiently small. The tendon fixing holes 26 are sufficiently larger in diameter than the through holes 24 and slightly larger in diameter than the fixing plate 32.

  The fixing plate 32 is disposed substantially at the center of the tendon fixing hole 26 and fixed with mortar or concrete as a filler (also referred to as groud) in the tendon fixing hole 26 together with the lower end portion of the tendon 28. The tendon fixing holes 26 are provided with vertical spirals 50 and / or hole reinforcing bars 52 which are reinforcing bars. The reinforcing bars may be of other forms.

  At the upper end 22 of the wall, a reinforcing beam 34 of steel or other appropriate strength member is disposed over substantially the entire length of the masonry building wall 18 in the direction perpendicular to the paper surface. The upper end of the tendon 28 projects upward through the through hole of the reinforcing beam 34 and is fixed to the wall upper end 22 by the fixing tool 37 via the reinforcing beam 34. When a plurality of reinforcing structures 10 are provided for one masonry construction wall 18, the reinforcing beams 34 can be shared. As described later, the tendon 28 is fixed to the top wall 22 in a tensioned state.

  Next, the reinforcement method of masonry structure 12 by providing such a reinforcement structure 10 is demonstrated. The roof initially supported by the masonry 12 may be partially or completely removed as needed. This is not limited as long as the roof does not interfere with the formation of the through holes 24. In addition, a reinforcing beam 34 is provided at the upper end 22 of the wall.

  Then, as a lateral hole forming step, lateral holes 20 are formed from the relatively lower side surface of the masonry building wall 18 to a predetermined intersection point 38. The intersection point 38 is a point where the through hole 24, the tendon fixing hole 26 and the lateral hole 20 intersect.

  As shown in FIG. 2, the opening of the lateral hole 20 is shaped along the joint of the block 36 forming the surface of the masonry wall 18. After the step of fixing the lower part of the tension material, which will be described later, the horizontal hole 20 is removed and stored, and the block 36 or the same color, another block of the same quality, is filled back and the construction mark becomes inconspicuous. Although it is preferable that the opening of the lateral hole 20 be shaped along the joint of the block body 36, the entire circumference may be, for example, a rectangular hole depending on the conditions, and even if the lateral direction is shaped along the joint can do.

  Then, as a through hole forming step, a first bit (first tool) 42 according to the diameter of the through hole 24 is attached to the tip of the tool shaft 40 (see FIG. 2) of the drill (drilling machine). The first bit 42 drills a through hole 24 communicating downward from the upper end 22 and the upper end 22 of the wall to the intersection 38. In this process, drilling may be performed while spraying a cooling gas (for example, a gas obtained by vaporizing fixed carbon dioxide) on the tool shaft 40 and the first bit 42 as an anhydrous method. The through hole 24 is formed avoiding the piping and wiring in the masonry wall 18. There is no limitation on the order of the lateral hole forming step and the through hole forming step.

  Then, as shown in FIG. 2, as a tool replacement step, the first bit 42 is removed from the tool shaft 40 in the side hole 20 and replaced with the second bit (second tool) 44 corresponding to the diameter of the tendon fixing hole 26. Do. Thereby, it is possible to shift to the next tendon fixing hole forming step without removing the tool shaft 40 from the through hole 24 after the through hole forming step. Further, as apparent from FIG. 2, the lateral holes 20 are relatively shallow and sufficient, and the workability is good, and the exchange from the first bit 42 to the second bit 44 is easy.

  However, in the case where a plurality of reinforcing structures 10 are provided to the masonry building wall 18 and a plurality of workers prepare two drills, one machine is used for drilling the through hole 24 and another is used. One may be distinguished for drilling the tendon fixing holes 26. In this case, the first drill for drilling the through holes 24 can drill the plurality of through holes 24 sequentially in advance while the first bit 42 is mounted. The second bit 44 is attached to and removed from the side hole 20 with respect to the tool axis 40 of the second drill.

  Next, as a tendon fixing hole forming step, the second bit 44 digs further downward from the intersection point 38 of the lateral hole 20 to drill the tendon fixing hole 26. The tendon fixing holes 26 extend to the root area 16 and, for example, the bottom thereof is set at about half the height of the root area 16. In the example of FIG. 1, while the root area 16 is laminated | stacked by the block body 36 of 4 steps | paragraphs, the bottom part of the tendon fixing hole 26 reaches to 2nd step | stage. In the step of forming the tendon fixing hole, the tool shaft 40 of the drill is disposed in the through hole 24, but depending on the conditions, the tendon fixing hole 26 may be drilled from the side hole 20 using a flexible joint type tool axis. .

  Further, as the hole side surface processing step, the inner side surface of the tendon fixing hole 26 is scraped by an electric pick, a water jet or the like to make the surface rough and / or a groove portion to be a shear key is provided. The adhesion strength of the filler is improved by such roughening and groove formation. In FIG. 1, FIG. 4 and FIG. 5, the inner side surface of the rough tendon fixing hole 26 is shown in a saw blade shape. The tendon fixing holes 26 are not limited to the vertical holes, and for example, the bottom portion may be cut in this process, and the bottom portion 48 may be provided to expand in diameter downward. The bottom portion 48 secures the filler more firmly.

  As a hole reinforcing step, longitudinal spirals 50 and / or hole reinforcing bars 52 which are reinforcing bars are provided in the tendon fixing holes 26. The longitudinal spiral 50 is coaxially inserted into the tendon fixing hole 26. When the longitudinal spiral 50 has a diameter larger than that of the fixing plate 32, it may be arranged before or after the insertion of the fixing plate 32. When the diameter is smaller than that of the fixing plate 32, the tension material lower fixing step described later After the first step, the wire may be inserted while being wound around the tendon 28 while being rotated.

  The hole reinforcing bar 52 is inserted into a hole provided diagonally so as to penetrate the tendon fixing hole 26 from the lower end of the masonry building wall 18 or the lower surface of the lateral hole 20. The hole reinforcing bar 52 may be a high strength material, and the upper portion of the hole reinforcing bar 52 may protrude inside the lateral hole 20. The order of the hole side machining process and the hole reinforcing process does not matter, and may be omitted depending on the conditions.

  Then, in the tendon lower fixing step, the tendon 28 is inserted from the reinforcing beam 34 and the wall upper end 22 to the tendon fixing hole 26, and the lower end of the tendon 28 is mortar or the like as a filler in the tendon fixing hole 26. Fix with concrete. When the tendons 28 are short, a plurality may be extended by couplers or welding.

  At this time, as shown in FIG. 3, first, the lower end of the tendon 28 is inserted to the lateral hole 20 in the first step of the tendon lower fixing process, and the fixing plate 32 and the nut 30 with a washer are attached. The fixing plate 32 has a central hole inserted into the lower end of the tendon 28 and is supported from below by a screwed nut 30. Fixing the fixing plate 32 from above and below by the two nuts 30 enables stable filling of the filler. The fixing plate 32 may be provided with several holes and peripheral notches in a well-balanced manner so as to facilitate the filling of the filler. A plurality of fixing plates 32 may be provided.

  Since the horizontal holes 20 are relatively shallow and sufficient and the workability is good, the insertion of the fixing plate 32 is easy, and the fixing plate 32 does not need a deep insertion notch as in the invention described in Patent Document 1, Good strength is obtained. Similarly, because the installation of the nut 30 in the lateral hole 20 is easy, it is not necessary to provide the nut 30 in advance when inserting the tendon 28 from the upper end 22 of the wall, and therefore the through hole 24 is thin accordingly It can be diameter. The tendon 28 is lowered until the fixing plate 32 is about half the depth of the tendon fixing hole 26.

  Then, as a second step of the tendon lower fixing step, the filler is poured into the tendon fixing holes 26 from the side holes 20, and the tendon 28 is fixed together with the fixing plate 32. At this time, since the tendon fixing hole 26 is opened upward, the filler does not leak and simple pouring is possible. Also, the side holes 20 are relatively shallow holes, and the work of pouring the filler into the tendon fixing holes 26 is easy.

  In the tendon lower fixing step, the transverse holes 20 together with the tendon fixing holes 26 are backfilled with the filler. The surface of the lateral hole 20 may be covered with a block 36 or a substitute. The tendon fixing holes 26 and the lateral holes 20 are shallower and smaller in volume than the lateral holes 510 provided in the concrete foundation 502 (see FIG. 6) in the invention described in Patent Document 1, and filler filling is easy.

  The filler filled in the tendon fixing holes 26 is properly cured and solidified. Thus, the lower end of the tendon 28 is firmly fixed to the tendon fixing hole 26 and the root portion 16 together with the fixing plate 32. The root area 16 is thicker than the masonry wall 18 and has high strength, and the fixation of the tendon 28 is considerably strong.

  Next, as a tension application step, tension is applied by pulling upward on the wall upper end 22 of the tendon 28 and the upper end portion projecting from the reinforcing beam 34 using a jack or the like. Due to this tension, an appropriate vertical compression force is applied to the masonry structure 12 as a prestress.

  Further, in the tendon upper fixing step, the upper portion of the tendon 28 is fixed to the wall upper end 22 via the reinforcing beam 34 by the fixing tool 37 in a state where the tension is applied to the tendon 28. The fixture 37 may be removable, and the tensioning step and the tendon upper fixing step may be performed again as a readjustment after the fact. When the tension application mechanism in the tension application process has a simple configuration, the tension material upper fixing process may be omitted without removing it as it is.

  According to the reinforcing structure 10 and the reinforcing method of the masonry structure 12 according to the present embodiment as described above, it is possible to improve the shear stress and bending strength of the masonry structure wall 18 by prestressing with the tendon 28 Earthquake resistance is improved, yet the appearance is almost maintained.

  In addition, the lateral hole 20 is formed on the side surface of the masonry building wall 18, so that the lower end of the tendon 28 can be appropriately fixed without excavating the ground 13. The preparation of the drilling machine, the digging process, the storage and backfilling processes of the earth and sand are not necessary, and the construction becomes simple, and the cost can be reduced and the construction period can be shortened. The ground 13 on which the old masonry 12 stands is likewise an old tiled structure, which may have an integral cultural value with the masonry 12, but in such a case also the tiled structure It does not affect The side holes 20 may be relatively shallow, and drilling of the side holes 20 and working in the side holes 20 may be facilitated.

  In addition, it is not necessary to modify the concrete foundation 14 which is important in terms of strength, and the strength is maintained. The tendon fixing hole 26 with a somewhat large diameter is provided only below the horizontal hole 20, and the through hole 24 is sufficient if the tendon 28 can be inserted, and the diameter can be made considerably small and the masonry wall can be made Damage to 18 is small. In particular, since the nut 30 (see FIG. 3) is mounted from the side hole 20, the diameter of the through hole 24 can be reduced accordingly.

  In the reinforcing structure 10 of the masonry structure 12, if it is required to reversibly remove the reinforcing member in the future to return to the original state, the lateral hole 20 is provided again and the exposed tension member 28 is cut. The tendon 28 can also be withdrawn from the top wall 22. Also in this case, the excavation of the ground 13 is unnecessary.

  As shown in FIG. 4, as a first modification of the reinforcing structure 10, the lateral holes 20 may be provided on the side surface of the underground root area 16. In this case, it is necessary to excavate the ground 13 to secure the work area 46, but since the work area 46 is shallower and smaller than the work area 506 (see FIG. 6) in the prior art, a small amount of digging is sufficient. Also, the side holes 20 are sufficiently shallow and easy to work as compared with the side holes 510 (see FIG. 6) in the prior art. By backfilling the work area 46, the horizontal holes 20 become underground and the construction trace is not visually recognized, and the appearance of the masonry building wall 18 is maintained.

  Furthermore, as shown by phantom lines in FIG. 4, the tendon fixing holes 26 may have a depth reaching the concrete foundation 14. Thereby, the lower end of the tendon 28 can be fixed more firmly together with the fixing plate 32. In this case, the drilling amount of the tendon fixing holes 26 to the concrete foundation 14 is considerably smaller than the horizontal holes 510 (see FIG. 6) in the prior art, and the strength of the concrete foundation 14 does not decrease much. The depth of the tendon fixing holes 26 may be determined so that the fixing plate 32 has a preferable arrangement in consideration of strength. Moreover, although illustration is abbreviate | omitted, you may provide the vertical spiral 50 and the hole reinforcement rebar 52 similar to the above.

  As shown in FIG. 5, as a second modification of the reinforcing structure 10, the lateral hole 20 may be provided on the side surface of the base portion 14 when the base portion 14 is shallow. In this case, it is necessary to excavate the ground 13 to secure the work area 46, but since the work area 46 is shallower and smaller than the work area 506 (see FIG. 6) in the prior art, a small amount of digging is sufficient. Further, even if the position of the fixing plate 32 is the same as that of the prior art shown in FIG. 6, the drilling amount of the tendon fixing holes 26 and the lateral holes 20 is considerably smaller than that of the lateral holes 510, and the strength of the concrete foundation 14 is too low. It does not decline.

  The tendon fixing holes 26 may be provided with vertical spirals 50 and hole reinforcing bars 52 (not shown) similar to the above, or the horizontal holes 20 may be provided with horizontal spirals 54 as reinforcing bars. Also in this case, by filling back the work area 46, the horizontal hole 20 becomes underground and the construction trace is not visually recognized, and the appearance of the masonry building wall 18 is maintained.

  The present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be freely modified without departing from the scope of the present invention.

  10 reinforcement structure, 12,500 masonry structure, 13 ground, 14,502 concrete foundation (base part), 16,504 root foundation, 18,505 masonry wall, 20,510 lateral hole, 22 wall upper end, 24, 508 through hole, 26 tendon fixing hole, 28, 516 tendon, 30 nut, 32, 520 fixing plate (fixing member), 34 reinforcing beam, 36 block body, 37 fixing member, 38 intersection point, 40 tool axis, 42 1st bit (1st tool), 44 2nd bit (2nd tool), 46,506 Working area, 48 Dispensing bottom, 50 vertical spirals, 52 hole reinforcing bars, 54 horizontal spirals, 522 spirals.

Claims (9)

A masonry or a lateral hole formed on the side of a foundation part under the ground supporting the masonry;
A through hole formed downward from the upper end of the wall of the masonry wall which is a part of the masonry structure and in communication with the lateral hole;
A tendon fixing hole which is wider than the through hole formed downward from the lateral hole below the through hole;
A tendon extending from the upper end of the wall to the tendon fixing hole;
Have
The tendon is fixed by the filler with the fixing member whose lower end is wider than the through hole in the tendon fixing hole, and the upper portion is fixed to the upper end of the wall in a tension applied state. Reinforcement structure of masonry that is characterized. In the reinforced structure for masonry according to claim 1,
A reinforced structure for masonry construction, wherein the lateral hole is formed in the masonry wall. In the reinforced structure for masonry according to claim 1 or 2,
The reinforcement structure for masonry construction, wherein the tendon fixing hole and the tendon reach the base portion. A lateral hole forming step of forming lateral holes from a masonry structure or a side of an underground foundation portion supporting the masonry structure to a predetermined intersection point;
A through hole forming step of forming a through hole communicating downward from the upper end of the wall of the masonry wall, which is a part of the masonry structure, to the intersection;
A tendon fixing hole forming step of forming a tendon fixing hole wider than the through hole further downward from the intersection point;
A tendon lower fixing step of inserting a tendon from the upper end of the wall to the tendon fixing hole, and fixing the lower end of the tendon together with a fixing member wider than the through hole in the tendon fixing hole with a filler;
Tensioning step of applying tension by pulling the upper portion of the tendon upwards;
A tendon upper fixing step of fixing the upper portion of the tendon to the upper end of the wall in a state where the tendon is tensioned;
A method of reinforcing a masonry characterized by having: In the method of reinforcing a masonry according to claim 4,
The through hole and the tendon fixing hole are drilled by a drilling machine,
In the through hole forming step, a first tool corresponding to a diameter of the through hole is provided at a tip of a tool axis of the drilling machine, and the through hole is drilled by the first tool,
In the tendon fixing hole forming step, a second tool corresponding to a diameter of the tendon fixing hole is provided at a tip end of the tool shaft, and the tensin member fixing hole is drilled by the second tool,
A method of reinforcing a masonry structure, wherein the second tool is provided at the tip of the tool shaft in the lateral hole. In the method of reinforcing a masonry according to claim 5,
After forming the through hole by the drilling machine in the through hole forming step, there is provided a tool exchanging step of removing the first tool from the tool shaft in the lateral hole and replacing it with the second tool. How to reinforce masonry. In the method of reinforcing masonry according to any one of claims 4 to 6,
A method of reinforcing a masonry structure, wherein at least a part of the opening of the side hole is shaped along a joint of a block body which forms a surface of the masonry structure. In the method of reinforcing masonry according to any one of claims 4 to 7,
A method of reinforcing a masonry structure, comprising a hole side processing step of grinding the inner surface of the tendon fixing hole to make the surface rough or to provide a groove. In the reinforcement method of masonry structure according to any one of claims 4 to 8,
A method of reinforcing a masonry structure comprising a hole reinforcing step of providing reinforcement bars in the tendon fixing holes.

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