JP2004353286A - Method of reinforcing skeleton of masonry construction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of reinforcing a skeleton of masonry construction constructed using bricks and blocks (including stones such as sand stones and andesite) as a base material. <P>SOLUTION: An injection material stable and hard to deteriorate is filled in a cavity formed near a surface layer part of the skeleton, and using the injection material as a filling material for the surface layer part of the skeleton, an injection material with high filling property is filled in a cavity formed inside the skeleton. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of a method of reinforcing a masonry skeleton constructed using bricks, blocks, and the like (including stone materials such as sandstone and andesite) as a base material, and particularly, a aging structure of a historic building. The present invention relates to a reinforcing method that does not affect the design of the surface layer.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, the following techniques (i) to (iii) are known as a method of reinforcing an aged masonry skeleton (hereinafter sometimes simply referred to as a skeleton).
[0003]
(I) A method of filling the voids formed in the skeleton with an inorganic injection material such as cement slurry to reinforce the skeleton. Specifically, a plurality of holes are excavated along gaps formed in the surface layer of the skeleton, and a filling nozzle such as a hose is inserted into the excavation holes. The periphery of the filling nozzle and the opening of the space are closed with a filling material, and the inorganic filling material is filled and cured from the filling nozzle. Since this reinforcing method uses an inorganic injection material that is not affected by temperature or the like, it has an advantage that a long-term stable reinforcing effect can be exhibited. Moreover, since it can be easily washed off even if it adheres to the surface layer of the skeleton, the workability is good.
[0004]
(Ii) A method in which a void formed in the skeleton is filled with an organic injection material such as an epoxy resin to reinforce the skeleton. For example, in Patent Literature 1, a plurality of holes for inserting a plug for filling an organic injectable material are excavated in a body, and a plug for filling an organic injectable material is inserted into the excavated hole and fixed. A reinforcing method is disclosed in which an organic injectable material is filled and hardened through a plug, and thereafter, a protrusion of the filling plug protruding from the surface of the skeleton is removed, and an insertion portion of the filling plug fixed in an excavation hole is filled and killed. . Since this reinforcing method uses an organic injection material that is a viscous material, it can be filled to every corner of the void, and has an advantage that highly accurate reinforcement can be performed. Moreover, since the filling plug is buried in the body, the filling plug can be installed in the body as a reinforcing anchor together with the filling of the organic injection material.
[0005]
(Iii) A method in which a steel rod or the like is embedded in the skeleton to reinforce the skeleton. For example, Patent Literature 2 discloses a reinforcement method in which a hole is excavated on the inner surface of a brick wall, a reinforcing bar is inserted after filling the excavation hole with a primer, and the entrance of the excavation hole is modified with brick powder. ing. Specifically, the above-mentioned excavation holes are arranged on both sides of the crack, and are excavated at a substantially central portion in the thickness direction of the brick wall so as to intersect the cross section of the crack. Reinforcing bars are inserted into them and fixed with primers. Since this reinforcing method is performed from the inner surface of the brick wall, it has an advantage that the design of the appearance of the brick wall can be kept healthy.
[0006]
[Patent Document 1]
JP 2002-242446 A [Patent Document 2]
JP-A-7-217225
[Problems to be solved by the present invention]
In the reinforcing method of the above (i), usually, an inorganic injection material in which particles (cements) and water are mixed is filled into the voids. Therefore, in the case of discontinuous or fine voids, the pressure when passing through a narrow portion is reduced. Due to factors such as rising water, only water is absorbed into the surroundings, and the remaining particles are deposited and clogged. Therefore, it is not possible to expect that the inorganic material is filled into every corner of the void, and it cannot be said that this is a highly accurate reinforcing method.
In addition, there is a problem that the filler material remains on the surface layer portion of the skeleton and the design property is impaired.
[0008]
The organic injection material such as an epoxy resin used in the reinforcing method (ii) is not suitable for reinforcing the vicinity of the surface layer of the skeleton because the material is deteriorated by ultraviolet light or temperature change. In addition, if the organic injectable material adheres to the surface layer of the skeleton, removal thereof is troublesome, and the design of the surface layer of the skeleton may be impaired, which is not particularly suitable for reinforcing a historic building.
The viscosity of the organic injection material is not adjusted depending on the portion to be filled.
[0009]
In the reinforcing method (iii), a relatively long reinforcing bar is used because appropriate strength is not exhibited unless the crossing reinforcing bars are firmly integrated. That is, it is necessary to excavate the hole into which the reinforcing bar is to be inserted, and there is a problem that the equipment becomes large and the workability is poor.
[0010]
An object of the present invention is to fill a void generated near the surface layer of the skeleton with a stable and hardly deteriorated injection material, for example, an inorganic injection material, and to fill a void generated inside the skeleton with a high filling property, for example, An object of the present invention is to provide a method of reinforcing a masonry building body which can maintain a sound design of a surface layer portion of a building body by filling with an organic injectable material, and can apply high-precision reinforcement to the building body.
[0011]
A second object of the present invention is to provide a method for reinforcing a masonry skeleton having good workability.
[0012]
[Means for Solving the Problems]
As means for solving the problems of the prior art, a method for reinforcing a masonry skeleton according to the invention described in claim 1 is as follows.
A method of reinforcing a masonry frame constructed using bricks, blocks, etc. as a base material,
Filling the voids generated near the surface layer of the skeleton with a stable and hardly deteriorated injection material, and filling the voids generated inside the skeleton using the filler material as a filler for the surface layer portion of the skeleton, thereby injecting with a high filling property. It is characterized by being filled with a material.
[0013]
A method for reinforcing a masonry skeleton according to the invention as set forth in claim 2,
A method of reinforcing a masonry frame constructed using bricks, blocks, etc. as a base material,
Fill the voids generated near the surface layer of the skeleton with the inorganic injection material, and fill the voids generated inside the skeleton with the organic injection material using the inorganic injection material as a filler for the surface layer of the skeleton. It is characterized by doing.
[0014]
The invention according to claim 3 is a method for reinforcing a masonry skeleton according to claim 1 or 2,
The filling process of the injection material or the inorganic injection material that is stable and hard to deteriorate is performed from the outer wall surface of the skeleton, and the filling process of the injection material or the organic injection material with high filling property is performed from the inner wall surface. I do.
[0015]
The invention according to claim 4 is the method for reinforcing a masonry skeleton according to any one of claims 1 to 3,
The injection material or the organic injection material having a high filling property is characterized in that the viscosity is adjusted depending on the portion to be filled.
[0016]
The invention according to claim 5 is a method for reinforcing a masonry skeleton according to any one of claims 1 to 3,
In the filling step of the injection material or the inorganic injection material that is stable and hard to deteriorate, the fittings of the masonry skeleton are removed, and the voids that appear by removing the fittings are filled with the injection material or the inorganic injection material that is stable and hard to change. After that, the repaired or new fitting is assembled back into the skeleton.
[0017]
The invention according to claim 6 is a method for reinforcing a masonry skeleton according to any one of claims 1 to 3,
The filling process of the injection material or the inorganic injection material, which is stable and hard to deteriorate, is to remove the base material of the outer wall surface and the inner wall surface where the void crack has occurred, and the surrounding base material from the skeleton,
Excavating a plurality of holes along the gap that appeared by removing the base material, and inserting a filling nozzle into the excavation hole,
The periphery of the nozzle and the opening of the gap are closed with a filling material, filled with an injection material or an inorganic injection material that is stable and hard to deteriorate, and then cured, and then the removed base material is assembled back into the main body. I do.
[0018]
[Embodiments and Examples of the Present Invention]
Hereinafter, an embodiment of a method for reinforcing a masonry skeleton according to the first to sixth aspects of the present invention will be described with reference to FIGS. 1 to 5.
[0019]
The reinforcing method of the present invention is carried out, for example, on a skeleton 3 of an old building 2 which is constructed using bricks 1 as a base material.
[0020]
First, a gap 4a formed in the vicinity of the surface layer portion of the building body 3 of the building 2 is filled with a stable and hardly deteriorated injection material, for example, an inorganic injection material 5 such as a cement slurry (hereinafter abbreviated as inorganic injection material 5 etc.). Fill).
[0021]
Specifically, the damaged fitting 6 (for example, a window frame) is removed from the frame 3 of the building 2 in order to replace it. Using a trowel or the like, an inorganic injection material or the like 5 is applied and filled into the gap 4a that has appeared by removing the fitting 6. After the inorganic injection material 5 is cured, a repaired or new fitting is assembled again (see FIG. 1, the invention according to claim 5). In addition, as the inorganic injection | pouring material 5 filled in the space | gap 4a near the fitting 6, the mortar which has a viscosity is used in order to prevent dripping during a curing period.
[0022]
As shown in FIG. 2, the void 4 a generated near the inner or outer surface layer of the skeleton 3 of the building 2 often has a crack at its end reaching the outer wall surface and the inner wall surface of the skeleton 3. The places where the cracks in the gaps 4a appear are visually confirmed. As shown in FIG. 3, the brick 1 a where the crack of the void 4 a appears and the brick 1 b around the brick 1 a are removed from the frame 3, and a plurality of bricks 1 a along the void 4 a which emerged by removing the bricks 1 a and 1 b are removed. (2 in FIG. 3) are excavated, and a nozzle 8 for filling the inorganic injection material or the like 5 is inserted into the excavation hole 7. The periphery of the filling nozzle 8 and the opening of the space 4a are closed with a filling material 9, and an inorganic injection material 5 or the like is injected into the space 4a to be filled and cured. Thereafter, the removed bricks 1a and 1b are reassembled into the frame 3 and restored to the original state (the invention according to claim 6). Therefore, the sealing material 9 does not appear on the outer wall surface and the inner wall surface of the skeleton hidden by the reassembled bricks 1a and 1b, and the design of the surface layer portion of the skeleton can be kept healthy.
[0023]
Next, the above-mentioned inorganic injection material 5 or the like 5 is used as a filler for the surface layer of the building, and a filling material having a high filling property (good) in the void 4b formed inside the building 3 of the building 2, for example, an epoxy resin. , Etc. (hereinafter abbreviated as the organic injection material 10 etc.). The filling step of the organic injection material 10 and the like 10 of the present embodiment is performed by a high-pressure injection method using a high-pressure injection device and a funnel jig for a brittle structure described in Patent Document 1 described above. The filling step is performed from the inner wall surface of the skeleton 3 in order to keep the appearance of the skeleton 3 sounder (the invention according to claim 3).
[0024]
More specifically, a plurality of holes 12 for inserting a plug 11 (high-pressure injection device) for filling an organic injection material or the like 10 from the inner wall surface of the frame 3 are provided from the position of the horizontal joint 13. (Three in FIG. 1) Excavate in the frame 3 by inclining downward so as to straddle the horizontal joints 13. The arrangement and number of the excavation holes 12 are determined by conducting a sampling test. In this embodiment, as shown in FIG. 4, it is arranged at the top of a substantially equilateral triangle, and the length L of one side thereof is about 260 mm. The depth T (see FIG. 1) of the excavation hole 12 is set to about 600 mm which reaches a substantially middle position in the thickness direction of the frame 3.
[0025]
As shown in FIG. 5, the plug 11 for filling the organic injectable material 10 and the like includes a valve portion 11a, a pipe portion 11b, and a joint portion 11c. Incidentally, the length M of the filling plug 11 is about 330 mm.
[0026]
At the tip of the pipe portion 11b, a sponge sealing material 14 is provided to fill the gap between the outer periphery and the inner periphery of the drilling hole 12, and at the other end, a funnel-shaped rubber guide cap 15 ( Funnel jig).
[0027]
The guide cap 15 is fixed by fitting a fitting portion 15a provided at an inner peripheral tip portion thereof into a groove portion 11d formed along the outer periphery of the pipe portion 11b, and the filling plug 11 is excavated by the guide cap 15. Insert so that the opening of the hole 12 is firmly closed. As a result, the tip (bulb portion) of the filling plug 11 reaches a substantially intermediate position (about 300 mm in depth) of the excavation hole 12.
[0028]
Further, the guide cap 15 has an insertion hole 15b of a nozzle 16 for filling an organic injection material or the like 10 for fixing a plug, and the nozzle 16 is inserted into the insertion hole 15b. Then, an organic injection material 10 ′ is injected and filled into a gap 17 between the outer circumference of the pipe portion 11 b formed behind the sealing material 14 of the filling plug 11 and the inner circumference of the excavation hole 12. At this time, the sealing material 14 can prevent the filled organic injection material 10 ′ from infiltrating around the valve portion 11 a, and can prevent the valve portion 11 a from being clogged.
[0029]
The above-mentioned filling step is performed until the organic injection material 10 ′ overflows from the insertion port 15 b, and thereafter, the organic injection material 10 ′ is hardened and the filling plug 11 is fixed in the drill hole 12. Since the filling plug 11 is firmly fixed in the borehole 12, the filling plug 11 comes out of the borehole 12 or becomes unstable when the organic injectable material 10 or the like 10 is injected and filled at a high pressure. Nothing. Further, since the drilling hole 12 is closed by the organic injection material 10 ′, the organic injection material 10 filled into the inside of the frame does not flow backward from the drill hole 12 and overflows on the inner wall surface of the frame 3. The filling plug 11 is firmly fixed in the excavation hole 12 by the sealing member 14 and the guide cap 15 during the filling step and is stable, so that the fixing operation of the filling plug 11 is simple.
[0030]
Since the filling plug 11 is fixed in the excavation hole 12, the organic injection material 10 ′ for fixing the plug hardly adheres to the inner wall surface of the frame 3. In particular, since the opening 15c of the guide cap 15 is separated from the inner wall surface of the frame 3, even if the organic injection material 10 'hangs down from the opening 15c of the guide cap 15 during the filling step, the inner wall surface of the frame 3 will not be disturbed. Does not adhere to Therefore, the design of the surface layer of the skeleton can be kept healthy.
[0031]
A supply pipe 19 for supplying an organic injectable material or the like 10 from the high-pressure pump 18 to the fill plug 11 is connected to the joint portion 11c of the filling plug 11, and the organic injectable material or the like 10 is supplied from the valve portion 11a to the body 3 of the main body 3. Inject and fill inside. More specifically, high-viscosity organic injection, which will be described in detail later, is performed first so that the injected organic injection material 10 does not overflow from the gap 4b generated near the fitting 6 that has not been removed. A material or the like 10 is injected and filled in the void 4b formed near the fitting 6 which has not been removed. Thereafter, the organic injection material 10 and the like 10 previously filled and cured and the inorganic injection material 5 and the like 5 are used as fillers, and the other portions of the organic injection material 10 are injected and filled.
[0032]
The filled organic injection material or the like 10 is filled into the gap 4b inside the frame 3 through a minute gap while applying a reaction force to the filling plug 11 and the sealing material 14 and the like. In addition, since the brick used as the base material of a historical building has a high water absorption, in the present embodiment, a medium / high-viscosity organic injection material or the like is used. At this time, the high-viscosity organic injectable material 10 is filled with the organic injectable material 10 or the like filling the void 4b generated near the fitting 6 so that the organic injectable material 10 does not overflow into the void 6b. Use etc. As the organic injection material 10 and the like to be filled into the other space 4b, an organic injection material or the like having a medium viscosity is used so as to easily fill all corners of the space 4b. That is, the viscosity of the organic injectable material 10 or the like is adjusted depending on the portion to be filled (the invention according to claim 4). Therefore, the organic injection material 10 and the like are hardly absorbed by the bricks, and function reliably as a connecting material between adjacent bricks. In addition, since the viscosity of the organic injectable material or the like 10 is adjusted depending on the portion to be filled, both the soundness of the design of the surface layer of the skeleton and the simplicity of the filling operation can be achieved.
[0033]
The high-pressure pump 18 has a high pumping capacity so that the medium- and high-viscosity organic injection material 10 can be filled. In the present embodiment, as an example, a high-pressure pump (a maximum pumping capacity of 9.8 Mpa) described in JP-A-11-325391 is used.
[0034]
The capacity of the organic injectable material or the like 10 to be filled is generally determined by a sampling test. Whether or not the organic injectable material or the like 10 is filled in the gap 4b depends on the capacity and the pumping speed of the high-pressure pump 18. Judging from the above, the process ends when the water finally reaches the surface of the skeleton through the minute gap. At this time, even if the organic injectable material 10 overflows into the surface layer of the skeleton, the organic injectable material 10 does not drip because of its viscosity. Therefore, if the overflowing organic injectable material 10 is immediately removed, the organic injectable material 10 does not adhere to and remain on the surface layer of the skeleton, and the design can be kept sound.
[0035]
After the filling is completed, the projecting portion of the filling plug 11 projecting from the excavation hole 12 is hit with a hammer or the like, and the groove portion 11d formed in the pipe portion 11b is thread-folded to guide the end portion of the pipe portion 11b forming the projecting portion with the guide. The cap 15 and the joint 11c are removed. At this time, since the guide cap 15 is disposed between the opening of the excavation hole 12 and the plug 11 for filling, it is possible to prevent the end of the opening from being lost, and it is also possible to prevent the surface layer of the skeleton. Design can be kept healthy.
[0036]
Finally, the opening of the excavation hole 12 is closed with an inorganic injection material or the like, and the insertion portion of the filling plug 11 fixed in the excavation hole 12 is buried to complete the reinforcing work. Therefore, there is almost no need to remove the filling plug 11, and the workability is good. In addition, the organic injection material 10 ′ for fixing the plug and the filling plug 11 can be used as reinforcing means as they are.
[0037]
In the above reinforcing method, the gap 4a in the surface layer of the skeleton is reinforced by filling it with the inorganic injection material 5 or the like, so that the ventilation performance and the moisture absorption / humidity performance of the skeleton 3 are not hindered. Then, since the organic injectable material 10 is filled into the voids 4b inside the frame, the organic injectable material 5 cannot be completely filled not only the voids 4b but also the inorganic injectable material 5 and the like. The material 10 can be filled, and the skeleton can be reinforced with high accuracy.
[0038]
In the above embodiment, the historic building 2 using the brick 1 as a base material has been described, but is not limited thereto. The same can be applied to a masonry frame whose base material is a stone block such as sandstone or andesite having a relatively high water absorption.
[0039]
Further, in the present embodiment, the holes 12 for filling the organic injection material 10 and the like are arranged at the apexes of an equilateral triangle having a side of about 260 mm. They may be arranged in a grid or the like, and the length of one side is also determined by a sampling test. The depth is appropriately changed depending on the thickness of the frame.
[0040]
Further, in the above embodiment, the filling step of the inorganic injection material 5 and the like is performed from the inner wall surface and the outer wall surface of the skeleton 3. However, when the interior design of the skeleton 3 is not required, only the outer wall surface of the skeleton 3 is required. It may be applied to
[0041]
[Effects of the present invention]
A method for reinforcing a masonry skeleton according to the invention as set forth in claims 1 to 6, comprises filling an injection material, for example, an inorganic injection material, which is stable and hardly deteriorated into a gap formed near a surface layer portion of the skeleton. Is used as a filler for the surface layer of the skeleton, and the gap formed inside the skeleton is filled with an injection material having a high filling property, for example, an organic injection material, so that the organic injection material and the like can adhere to the surface layer of the skeleton. Almost no, the design can be kept sound. Moreover, there is almost no need to remove the adhered organic injection material and the like, and the workability is good.
[0042]
In addition, not only the voids inside the skeleton but also the remaining voids that could not be completely filled with the inorganic injection material can be filled with the organic injection material, etc. Can be.
[0043]
Since the viscosity of the organic injectable material or the like is adjusted depending on the portion to be filled, it is possible to prevent the organic injectable material and the like from being dripped from the surface layer of the skeleton and to fill the corners of the voids with the organic injectable material and the like.
[Brief description of the drawings]
FIG. 1 is a sectional view conceptually showing an embodiment of a method for reinforcing a masonry skeleton according to the present invention.
FIG. 2 is a diagram conceptually showing a void appearing in a surface layer portion of a skeleton.
FIG. 3 is a view conceptually showing a filling step of an inorganic injection material or the like.
FIG. 4 is a diagram showing an arrangement of holes into which plugs for filling an organic injection material or the like are inserted.
FIG. 5 is a diagram showing a plug for filling an organic injection material or the like inserted and fixed in a drill hole.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Brick 2 Building 3 Building 4a, 4b Void 5 Inorganic injection material etc. 6 Fixture 7 Drilling hole 8 Filling nozzle 9 Filler 10 Organic injection material etc.

Claims (6)

This is a method of reinforcing a masonry skeleton built using bricks, blocks, etc. as a base material, and filling the voids near the surface layer of the skeleton with a stable and hard to deteriorate injection material, and creating voids inside the skeleton. A method for reinforcing a masonry skeleton, wherein the injection material is used as a filling material for a surface layer portion of the skeleton and is filled with an injection material having a high filling property. A method for reinforcing a masonry skeleton constructed using bricks, blocks, or the like as a base material, wherein voids generated near the surface layer of the skeleton are filled with an inorganic injectable material, and the voids generated inside the skeleton are filled with the inorganic material. A method of reinforcing a masonry skeleton, wherein an inorganic injection material is used as a filler for a surface layer of the skeleton to fill the organic injection material. The filling process of the injection material or the inorganic injection material that is stable and hard to deteriorate is performed from the outer wall surface of the skeleton, and the filling process of the injection material or the organic injection material with high filling property is performed from the inner wall surface. The method for reinforcing a masonry skeleton according to claim 1 or 2, wherein The method for reinforcing a masonry skeleton according to any one of claims 1 to 3, wherein the viscosity of the injection material or the organic injection material having a high filling property is adjusted depending on a portion to be filled. In the filling step of the injection material or the inorganic injection material which is stable and hard to deteriorate, the fittings of the masonry skeleton are removed, and the voids which appear by removing the fittings are filled with the injection material or the inorganic injection material which is stable and hard to change. The method for reinforcing a masonry slab according to any one of claims 1 to 3, wherein the slab is cured, and then the repaired or new fitting is reassembled into the slab. The filling process of the injection material or the inorganic injection material, which is stable and hard to deteriorate, is to remove the base material of the outer wall surface and the inner wall surface where the void crack has occurred, and the surrounding base material from the skeleton,
Excavating a plurality of holes along the gap that appeared by removing the base material, and inserting a filling nozzle into the excavation hole,
The periphery of the nozzle and the opening of the gap are closed with a filling material, filled with an injection material or an inorganic injection material that is stable and hard to deteriorate, and then cured, and then the removed base material is assembled back into the main body. The method for reinforcing a masonry slab according to any one of claims 1 to 3.

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