JP4316939B2 - Masonry wall reinforcement method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for reinforcing a masonry wall in which a plurality of stones are stacked adjacent to each other.
[0002]
[Prior art]
As a kind of gravity type retaining wall, a stone wall made by stacking machinite is known, and as a seismic reinforcement measure for this type of stone wall, for example, as described in Non-Patent Document 1, the following is shown. Six methods have been conventionally employed.
(1). Method of filling mortar into joint part of machinite (2). Construction method of concrete retaining wall in front of masonry wall (3). How to install a lattice frame in front of the masonry wall (4). In this method of placing natural ground reinforcement earthwork from the front of the masonry wall, in this method, since the reinforcing material is deeply placed in the back ground, the length of the reinforcing material needs to be 2 m or more.
(5). Method of placing a ground anchor from the front of the masonry wall (6). However, such a conventional method for reinforcing a masonry wall has the following problems.
[0003]
[Non-Patent Document 1]
Regarding the technology for seismic reinforcement and repair of residential walls, “Foundation” Vol. 29, No.4, pp21-27, 2001.
[0004]
[Problems to be solved by the invention]
That is, the method (1) is effective in preventing the backfill soil from being washed away because the Satoshi stones are not sufficiently connected to each other, but the effect on the stability of the entire masonry wall cannot be expected.
[0005]
The method {circle around (2)} has the effect of improving the stability of the masonry wall, but the effect on the fall of the masonry wall caused by the sinking of the backfilled chestnut is low and the construction cost is high. (3) The method has a low effect on the fall of the masonry wall caused by the sinking of backfilled chestnut stone, and there is a possibility that the Satoshi stone will come off.
[0006]
(4) With the method, the placement machine becomes large, construction is difficult when the front site is narrow, and the construction cost is high. In the methods (5) and (6), the placement machine becomes even larger than the method (4), and the construction cost is further increased.
[0007]
To summarize the above problems, the conventional masonry wall reinforcement method has a low effect on the stability of the entire masonry if the construction cost is low, and the effective method as a reinforcement measure is very expensive and has a large scale. There was a conflicting problem that required a simple construction machine.
[0008]
The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a reinforcing method capable of ensuring the stability of a masonry wall at a relatively low cost. is there.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in a method for reinforcing a masonry wall in which a plurality of stones are stacked adjacent to each other on the front surface of an inclined ground, the plurality of stones contact each other. Reinforcing material is placed at a plurality of locations of the joint portion, and grout material is filled around the reinforcing material to fix the reinforcing material to the sloped ground. By pushing a plurality of the Somachi stones arranged adjacent to the outer periphery of the part outward, the Somachi stones are mutually restrained.
[0010]
In addition, the present invention provides a method for reinforcing a masonry wall in which a plurality of mesoliths are stacked adjacent to each other with a back-filled chestnut layer interposed on the front surface of an inclined ground mountain, and a plurality of the masonry stones are connected to each other. The reinforcing material is placed at a plurality of locations of the joint portion where the reinforcing material abuts, and a grout material is filled around the reinforcing material, thereby fixing the reinforcing material to the inclined ground, and by placing the reinforcing material. Further, by pushing the plurality of Sapphire stones arranged adjacent to the outer periphery of the joint portion outwardly, the Somachi stones are mutually restrained.
[0011]
According to the method for reinforcing a masonry wall configured as described above, the stability of the masonry wall is increased because the reinforcement is pushed and pushed to the outside.
[0012]
In this case, the length of the reinforcing material may be a value that is slightly longer than the length of the Satoshi stone. Normally, this length is a relatively short value within 2 m, and this length of the reinforcing material Can be constructed with a small drilling machine such as a hand drill or small boring machine, and can be easily constructed even in a narrow front site, with low construction costs and a shortened construction period. it can.
[0013]
After the placement or fixing, the reinforcing member is fixed with a wide plate on its head, and a plurality of the chinsaw stones arranged adjacent to the outer periphery of the joint are supported and restrained by the wide plate. Can do.
[0014]
In addition, the reinforcing member includes a wide plate that is fixed in advance to the head thereof, and can support and restrain the plurality of the chin stones arranged adjacent to the outer periphery of the joint portion with the wide plate. .
[0015]
According to the above-described configuration, since a plurality of stones (up to four) arranged adjacent to the outer periphery of the joint portion are supported and restrained by the wide plate, the stability of the masonry wall is increased.
[0016]
The reinforcing material can be placed so that the tip penetrates the backfilled chestnut layer and a predetermined length penetrates into the natural ground.
[0017]
According to this configuration, since the reinforcing material penetrates to the back ground, it is possible to prevent the masonry wall from being deformed to the front side by the retaining effect of the reinforcing material.
[0018]
The reinforcing members can be arranged in a staggered manner at the joints at a predetermined interval.
[0019]
According to this configuration, it is possible to widen the placement pitch as compared with the case where the reinforcing material is placed near the central portion of the Sorachi stone.
[0020]
The front side of the Satoshi stone is covered with a covering material such as a netting material or a sheet before or after placement of the reinforcing material, and the wide plate is used to cover the covering material on the front side of the Satoshi stone. Can be locked and fixed.
[0021]
According to this configuration, the covering material is covered on the front surface of the Sorachi stone, so that the integration of the masonry wall can be further strengthened, and the covering pitch of the reinforcing material can be increased by covering the covering material. Can be spread.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. 1 and 2 show a first embodiment of a method for reinforcing a masonry wall according to the present invention.
[0023]
In the reinforcing method shown in the figure, a stone wall 16 is stacked in the vertical direction so that a plurality of intermediate stones 14 are adjacent to each other with a backfilled chestnut layer 12 interposed in front of the sloped mountain 10. Applied. The back-filled chestnut layer 12 is formed by laminating chestnut stones having a predetermined particle diameter to a predetermined thickness.
[0024]
The Mazoku stone 14 has a substantially square front surface, is aligned so that the holding length L is substantially the same, and is formed so that the vertical cross section is substantially triangular. Such machinite stones 14 are stacked in a multi-stage shape so that the end faces of the outer periphery are adjacent to each other in the left-right and vertical directions when viewed from the front side, and the stone-carrying wall 16 is constructed. Yes.
[0025]
Although such stone walls 16 are in contact with each other, each stone 14 can move independently, so that it has flexibility, but on the other hand, it is constrained or integrated with each other. It is not so stable.
[0026]
Further, as a result of the vibration experiment, the masonry wall 16 having such a structure has the back-filled chestnut layer 12 of the masonry wall 16 subsided due to vibration, and the masonry wall 16 protrudes from the front surface or the head It is known that the phenomenon of part tilting occurs and it becomes unstable.
[0027]
Therefore, in this embodiment, the reinforcement method for constraining and integrating the masonry wall 16 and preventing the settlement of the back-filled chestnut layer 12 has been devised. In this reinforcing method, a reinforcing material 18 that reaches the backfilled chestnut layer 12 is placed in the joint portion of the Somachi stone 14, and the reinforcing material 18 is filled with a grout material 20 around the reinforcing material 18. It is fixed to the included Kuriishi layer 12.
[0028]
In the case of the present embodiment, the reinforcing members 18 are placed every other joint portion located on the same straight line in the vertical and horizontal directions, and are arranged in a staggered manner as a whole.
[0029]
The reinforcing member 18 is a rod-shaped body having a predetermined length, and, for example, a reinforcing bar having a predetermined diameter is preferably used. Each reinforcing member 18 has a plurality of stones 14 adjacent to the joint portion when being placed. The diameter necessary to constrain these stones so as to push them outward and to push them outward.
[0030]
Further, in the case of the present embodiment, each reinforcing member 18 has a length that penetrates the backfilled chestnut layer 12 and the tip reaches the vicinity of the inclined ground mountain 10. Note that the total length of the reinforcing member 18 is not limited to that shown in FIG. 2, and has a length that reaches the backfilled chestnut layer 12 as long as the above-described restraining effect is obtained. Just do it.
[0031]
The grout material 20 has a predetermined fluidity in an initial state and is solidified or hardened with the passage of time, and is composed of, for example, mortar or resin mortar.
[0032]
When filling the grout material 20 around the reinforcing material 18, for example, a method in which a mortar having fluidity of a predetermined composition is press-fitted around the reinforcing material 18 from the front side of the masonry wall 16 using a pump, Alternatively, the grout material 20 is applied to the outer peripheral surface of the reinforcing material 18 in advance, and the grout material 20 is placed together with the reinforcing material 18. Further, the supply passage for the grout material 20 is provided inside or outside the reinforcing material 18. Any one of the methods of filling the grout material 20 around the reinforcing material 18 through the supply passage after the reinforcing material 18 is placed can be employed.
[0033]
When the grout material 20 is filled around the reinforcing material 18 and the grout material 20 is solidified after a predetermined time, and the reinforcing material 18 is fixed to the backfilling crushed stone layer 12, the reinforcing method of the present embodiment. Is completed.
[0034]
According to the method for reinforcing a masonry wall configured as described above, the stiffening wall 18 is restrained by pushing the joint stone 14 outwardly by placing the reinforcing member 18, so that the stability of the masonry wall 16 is increased.
[0035]
In this case, the length of the reinforcing member 18 may be a value slightly longer than the length of the machinite 14, and this length is usually a relatively short value of 2 m or less. The reinforcing material 18 can be constructed by a small drilling machine such as a hand drill or a small boring machine, and can be easily constructed even in a narrow site on the front surface, and the construction cost is low and the construction period is shortened. Can be planned.
[0036]
Further, in this embodiment, since the reinforcing member 18 is placed at the joint portion of the Sorachi stone 14, the placement pitch is set as compared with the case where the reinforcing member 18 is placed near the central portion of the Sorachi stone 14. It is possible to increase the width, and it is possible to reliably restrain the Satoshi stone 14.
[0037]
Furthermore, in the case of the present embodiment, the reinforcing material 18 is placed so that the tip of the reinforcing material 18 reaches the vicinity of the sloped ground mountain 10, filled with the grout material 20, and fixed to the backfilling crushed stone layer 12. The material 20 forms a partially improved and reinforced portion in which the backfilled chestnut stone layer 12 is solidified, thereby preventing the entire backfilled chestnut stone layer 12 from subsiding.
[0038]
In the embodiment shown in FIGS. 1 and 2, a stone wall 16 is formed by forming a backfilled chestnut stone layer 12 having a predetermined thickness on the front surface of the sloped ground mountain 10, and stacking the Chichiishi stones 14 on the front side of the backfilled chestnut stone layer 12. In the implementation of the present invention, the backfill chestnut layer 12 is not necessarily required, and can be applied to a masonry wall in the form of directly stacking the intercalated stone 14 on the front surface of the sloped ground 10. . In this case, the reinforcing material 18 is fixed to the ground 10 with the grout material 20.
[0039]
FIGS. 3 to 5 show a second embodiment of the method for reinforcing a masonry wall according to the present invention. The same or corresponding parts as those in the above embodiment are designated by the same reference numerals and the description thereof is omitted. Only the characteristic points will be described in detail below.
[0040]
In the embodiments shown in these drawings, similarly to the first embodiment, the reinforcing material 18a reaching the backfilled chestnut stone layer 12a is placed in the joint portion of the Sapphire stone 14a, and the grout is surrounded around the reinforcing material 18a. By filling the material 20a, the reinforcing material 18a is fixed to the backfilled chestnut layer 12a.
[0041]
The reinforcing members 18a are arranged in a zigzag shape as a whole, and, when placing, come in contact with a plurality of the stones 14a while adjoining the joint parts, and these stones 14a are outward. It has the necessary diameter to constrain them.
[0042]
In the case of the present embodiment, a screw is engraved on the head of the reinforcing member 18a, and when the reinforcing member 18a is placed, the screw portion protrudes to the front side of the masonry wall 16a. To.
[0043]
When the placement or fixing of the reinforcing member 18a is completed, as shown in FIGS. 4 and 5, a wide plate 22a is screwed onto the screw of the reinforcing member 18a at the head of the reinforcing member 18a. It is fixed by.
[0044]
The wide plate 22a is a flat plate having a size covering the end portions of the four interphase stones 14a arranged adjacent to the joint portion. In the present embodiment, the wide plate 22a is formed in a circular shape and fixed to the reinforcing member 18a. Then, the wide plate 22a abuts against the surface of the four intermediate stones 14a adjacent to the joint portion where the reinforcing member 18a is placed, and supports and restrains them. The shape of the wide plate 22a is not limited to a circle, and may be, for example, a polygon or an ellipse.
[0045]
In this embodiment, such a wide plate 22a is fixed to the head of the reinforcing member 18a. In addition to the restraint by the placement of the reinforcing member 18a shown in the first embodiment, the wide plate 22a Since a plurality of interphase stones 14a (up to four) arranged adjacent to the outer periphery are supported and restrained, the stability of the masonry wall 16a is further increased.
[0046]
6 and 7 show a third embodiment of the method for reinforcing a masonry wall according to the present invention. The same or corresponding parts as those in the above embodiment are designated by the same reference numerals and the description thereof is omitted. Only the characteristic points will be described below.
[0047]
In the embodiments shown in these drawings, similarly to the first embodiment, the reinforcing material 18b reaching the backfilled crushed stone layer 12b is placed in the joint portion of the marsh stone 14b, and the grout is surrounded around the reinforcing material 18b. By filling the material 20b, the reinforcing material 18b is fixed to the backfilled chestnut layer 12b.
[0048]
When the reinforcing material 18b is arranged and placed in a zigzag shape as a whole, the reinforcing material 18b contacts a plurality of the stones 14b while adjoining the joint portion, and pushes the stones 14b outward. Thus, it has the diameter necessary to constrain them.
[0049]
In the case of the present embodiment, the reinforcing member 18b is set so that the tip of the reinforcing member 18b penetrates the backfilled chestnut layer 12b and penetrates the inclined ground mountain 10b by a predetermined length when placed. The wide plate 22b is fixed in advance.
[0050]
As in the second embodiment, the wide plate 22b has a function of bearing and restraining a plurality of intermediary stones 14a (up to four) arranged adjacent to the outer periphery of the joint. In the embodiment configured in this manner, in addition to the operational effects of the above-described embodiment, the reinforcing material 18b penetrates to the back ground 10b, so that the masonry wall 16b is deformed to the front side by the retaining effect of the reinforcing material 18b. It becomes possible to prevent that.
[0051]
FIGS. 8 and 9 show a fourth embodiment of the method for reinforcing a masonry wall according to the present invention. The same or corresponding parts as those in the above embodiment are designated by the same reference numerals and the description thereof is omitted. Only the characteristic points will be described below.
[0052]
In the embodiments shown in these drawings, as in the third embodiment, a reinforcing material 18c that penetrates the backfilled crushed stone layer 12c and reaches the natural ground 10c is placed in the joint portion of the Marachi stone 14c. By filling the grout material 20c around the reinforcing material 18c, the reinforcing material 18c is fixed to the backfill chestnut layer 12b and the natural ground 10c.
[0053]
When the reinforcing material 18c is arranged and placed in a zigzag shape as a whole, the reinforcing material 18c contacts a plurality of the stones 14c while adjoining the joint portion, and pushes the stones 14b outward. Thus, it has the diameter necessary to constrain them.
[0054]
A wide plate 22c is fixed in advance to the head of the reinforcing member 18c. In the case of the present embodiment, a covering material 26c such as a netting material or a sheet is provided on the front surface side of the masonry wall 16c so as to cover the surface of the Satoshi stone 14c before placing the reinforcing material 18c. . As the covering material 26c, a wire net or a synthetic resin net, a synthetic resin sheet, a fiber sheet, or the like netted in a predetermined mesh is used.
[0055]
When the reinforcing material 18a is placed on the joint, the wide plate 22c latches and fixes the covering material 26c so that the covering material 26c is sandwiched between the wide plate 22c and the surface of the Somachi stone 14c. In the reinforcing method configured as described above, the following effects can be obtained in addition to the functions and effects of the above embodiment.
[0056]
In the case of the present embodiment, the covering material 26c is placed on the front side of the Sorachi stone 14c before the reinforcing material 18c is placed, and when the reinforcing material 18c is placed, the covering material is covered with the wide plate 22c. Since 26c is locked and fixed to the front surface of the Sapphire stone 14c, it is possible to further strengthen the integration of the masonry wall 16c by covering the covering material 26c, and to reinforce the reinforcing material by covering the covering material 26c. The pitch of 18c can be widened.
[0057]
In the fourth embodiment shown in FIGS. 8 and 9, the reinforcing member 18c having the wide plate 22c previously fixed to the head is used. However, the wide plate 22c is fixed to the reinforcing member 18c in advance. Is not always essential, for example, as in the second embodiment, the wide plate 22a is not fixed to the reinforcing member 18a in advance, and the covering member 26c is placed on the front surface of the Satoshi stone 14a after the reinforcing member 18a is placed. After covering, the wide plate 22a can be fixed to the head of the reinforcing member 18a.
[0058]
In this case, the covering material 26c is covered after the reinforcing material 18a is placed, and when the wide plate 22a is fixed to the reinforcing material 18a, the covering material 26c may be locked and fixed to the front surface of the Satoshi stone 14a.
[0059]
【The invention's effect】
As described above in detail, according to the method for reinforcing a masonry wall according to the present invention, the stability of the masonry wall can be ensured at a relatively low cost.
[Brief description of the drawings]
FIG. 1 is a plan view of a construction completion state showing a first embodiment of a method for reinforcing a masonry wall according to the present invention.
FIG. 2 is a cross-sectional view of the main part of FIG.
FIG. 3 is a cross-sectional view of an essential part in the initial stage of construction showing a second embodiment of a method for reinforcing a masonry wall according to the present invention.
FIG. 4 is a plan view of a construction completion state showing a second embodiment of the method for reinforcing a masonry wall according to the present invention.
5 is a cross-sectional view of the main part of FIG. 4;
FIG. 6 is a plan view of a construction completion state showing a third embodiment of the method for reinforcing a masonry wall according to the present invention.
7 is a cross-sectional view of the main part of FIG. 6;
FIG. 8 is a plan view of a construction completion state showing a fourth embodiment of the method for reinforcing masonry walls according to the present invention.
9 is a cross-sectional view of the main part of FIG.
[Explanation of symbols]
10, 10a to 10c Inclined mountain 12, 12a to 12c Back-filled chestnut layer 14, 14a to 14c Machiishi 16, 16a to 16c Masonry walls 18, 18a to 18c Reinforcement material 20, 20a to 20c Grout materials 22a, 22b, 22c Wide plate 26c Covering material

Claims (7)

In the method for reinforcing a masonry wall in which a plurality of stones are stacked adjacent to each other on the front of an inclined ground,
The reinforcing material is fixed to the sloped ground by placing a reinforcing material at each of a plurality of joint portions where the plurality of the stones contact each other, and filling a grout material around the reinforcing material,
By placing the reinforcing material, the plurality of the Sorachi stones arranged adjacent to the outer periphery of the joint portion are pushed outward to restrain the Sorman stones to each other . Reinforcement method. In the method of reinforcing masonry walls, piled up multiple intermediary stones adjacent to each other with a backfilled chestnut layer in front of the sloped ground,
The reinforcing material is fixed to the sloped ground by placing a reinforcing material at each of a plurality of joint portions where the plurality of the stones contact each other, and filling a grout material around the reinforcing material,
By placing the reinforcing material, the plurality of the Sorachi stones arranged adjacent to the outer periphery of the joint portion are pushed outward to restrain the Sorman stones to each other . Reinforcement method. After the placement or fixing, the reinforcing member is fixed with a wide plate at the head thereof, and a plurality of the Satoshi stones arranged adjacent to the outer periphery of the joint portion are supported and restrained by the wide plate. The method for reinforcing a masonry wall according to claim 1 or 2. The reinforcing member includes a wide plate fixed in advance to the head,
The method for reinforcing a masonry wall according to claim 1 or 2, wherein a plurality of the Satoshi stones arranged adjacent to the outer periphery of the joint portion are supported and restrained by the wide plate. 3. The method for reinforcing a masonry wall according to claim 2 , wherein the reinforcing material is placed so that a front end penetrates the backfilled chestnut layer and a predetermined length penetrates into the natural ground. The method of reinforcing a masonry wall according to any one of claims 1 to 5, wherein the reinforcing members are arranged in a staggered manner at the joints at predetermined intervals. The front side of the Satoshi stone is covered with a covering material such as a netting material or a sheet before or after placement of the reinforcing material, and the wide plate is used to cover the covering material with the front surface of the Satoshi stone. The method for reinforcing a masonry wall according to any one of claims 1 to 6, wherein the stone wall is fixedly fixed to the stone wall.

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