JP5142656B2 - Seismic reinforcement frame of cloth foundation opening - Google Patents

Description

  The present invention relates to a seismic reinforcement frame that is attached so as to be structurally integrated with a cloth-like foundation having an opening in a low-rise building to improve the earthquake resistance of the opening.

FIG. 1A (a) is an external perspective view showing an example of a fabric foundation method 10A, and an outer peripheral foundation 11 having foundation bases 11a and 12a and rising portions 11b and 12b rising vertically from these foundation bases, respectively. , Composed of an internal foundation 12. The moisture-proof soil space 21 provided on the bottom surface is, for example, sand laid on a polyethylene film and is similar in appearance to a solid foundation but is not an element related to the strength of the building.
FIG. 1A (b) is an external perspective view showing an example of the solid foundation method 10B, in which the entire bottom surface of the foundation is a foundation slab 15 and is integrated with the outer peripheral foundation 11 and the inner foundation 12. The solid foundation method is used for ground with a ground strength of 20 kN / m ² or more and less than 30 kN / m ² . In addition, about the part of the outer periphery foundation 11 and the internal foundation 12 which are the structures above a ground surface, it is substantially the same as said fabric foundation construction method 10A.
(Note that the space between the moisture-proof soil 21 in FIG. 1A (a) and the base slab 15 in FIG. 1A (b) is shown as a blank space, but this is for convenience of illustration. Actually, it is filled with ground, gravel, discarded concrete, etc.)

  The cloth foundation method 10A and the solid foundation method 10B shown in FIGS. 1A (a) and 1 (b) are generally reinforced concrete (RC), and the cloth-like foundations 11 and 12 that are common to both are made of continuous cloth. It has a role as an underground beam. As shown in FIGS. 1A (a) and 1 (b), the outer peripheral base 11 is usually formed with ventilation holes 13 at appropriate locations, and the inner base 12 is formed with a passage 14. In the openings such as the ventilation port 13 or the communication port 14, a cross-sectional defect portion in which the beam of the continuous cloth-like underground beam is reduced.

As shown in the sectional view of the rising portion 11b or 12b of the cloth foundation shown in FIGS. 1B (a) to 1 (d), conventionally, in these openings 13 or 14, the reinforced concrete reinforcing bars 18 (in broken lines) in the peripheral portions thereof. In addition to the above, the reinforcing bars 19 (indicated by bold lines) are used for reinforcement. However, such a reinforcing bar 19 cannot avoid a significant decrease in yield strength.
1B (a) and vent hole 13 of FIG. 1B (c) are formed by a cloth-like foundation on the left and right sides and the lower face of the four faces surrounding the opening, and the upper face is a cloth-like foundation. It is an example formed by the base (not shown) mounted in the top end of the. On the other hand, the person passage 14 in FIG. 1B (b) and the ventilation opening 13 in FIG. 1B (d) are examples in which four surfaces surrounding the opening are formed by a cloth-like foundation. In the case of constructing these on-site, a great deal of labor and cost increases due to the formwork of the opening and the reinforcing reinforcing bar assembly.

In patent document 1, as a reinforcement structure of the opening part of a cloth foundation, a part of wooden base mounted on a cloth foundation is made into a metal base, and the part of the metal base is located above an opening part.
Moreover, in patent document 2, although it is not a foundation, the angle-shaped reinforcement hardware which reinforces the corner of the opening part of a concrete wall is installed.
JP-A-8-199591 JP 2002-339487 A

Conventional seismic reinforcement means for openings in cloth foundations of low-rise buildings have the following problems.
Even if the reinforcement of the reinforced concrete around the cloth-shaped foundation opening is reinforced, it does not equal the proof strength of the continuous cloth-like underground beam, and is currently compromised.
The method of making a part of the wooden base as a metal base and positioning it above the opening as in Patent Document 1 cannot be easily applied to the cloth-like foundation opening of an existing building. Further, the upper surface of the opening is reinforced, but the left and right surfaces and the lower surface of the opening are not reinforced.
Since the angle-shaped reinforcement hardware of Patent Document 2 is also partially embedded in and integrated with surrounding concrete, it cannot be easily applied to an opening of an existing building. Further, the purpose is to prevent cracks at the corners, and reinforcement of the entire opening is not taken into consideration.

  Based on the above situation, the present invention is a seismic reinforcement frame for a cloth-like foundation opening of a low-rise building, which can be easily applied to both new and existing buildings, and a continuous underground beam in the opening. It aims at providing what can ensure the yield strength as.

In order to achieve the above object, the present invention provides the following configuration. The numbers in parentheses are reference numerals in the drawings described later, and are given for reference.
The seismic reinforcement frame according to the present invention is a seismic reinforcement frame (1, 2, 3, 4) attached to a rectangular opening (13, 14) formed as a notch in a cloth-like foundation (11, 12). And mounting surfaces (1a2) each having a rectangular frame member (1a to 1d) attached to the inside of the opening and having four corners that are rigidly joined, and each of the rectangular frame members abutting against four surfaces surrounding the opening. ~1d2) have a,
Of the four surfaces surrounding the opening (13, 14), the left and right surfaces and the lower surface are surfaces formed by the cloth-shaped foundation (11, 12), and the upper surface is continuously mounted on the top end. A surface formed by the base (17) or by the cloth foundation (11, 12),
The portion of the rectangular frame member (1a to 1d) located on the upper surface of the opening (13, 14) sandwiches a part of the base (17) or the cloth-like foundation (11, 12) from both side surfaces thereof. With a possible cross-sectional shape .

In addition the left side of the opening portion before Symbol rectangular frame member (13, 14), the portion located right surface or lower surface, that sandwich a portion of the cloth-like foundation (11, 12) from both sides thereof It is characterized by having a possible cross-sectional shape.

  In the present invention, a seismic reinforcement frame having a square frame member is attached to the inside of a square opening in a cloth-like foundation so as to be structurally integrated with the cloth-like foundation. In the cloth foundation opening that has been avoided from being provided directly below, the strength in the vertical direction against the load of the building and the resistance against the horizontal load due to the seismic force can be improved integrally with the cloth foundation. As a result, the position of the opening can be freely provided, and in particular, air stagnation at the corner of the internal rising portion can be prevented, and underfloor ventilation can be achieved. Furthermore, it is possible to reinforce an opening that is subjected to a large stress due to a bending moment generated in a ground improved in a soft ground or a foundation on which a pile is placed. As a result, the strength of the foundation in the portion where the opening is present can be ensured to be equal to or higher than that of the portion where the opening is not present. That is, it is possible to maintain a certain strength and rigidity as a continuous cloth-like underground beam regardless of the presence or absence of the opening. The square frame member has mounting surfaces that abut each of the four surfaces surrounding the opening, so that the integrity of the seismic reinforcement frame and the opening is reinforced, and the opening is supported with a rigid strength. Can do.

  Furthermore, since the rectangular frame member has a cross-sectional shape that sandwiches the base or the cloth-like foundation from both sides, the seismic reinforcement frame can be firmly attached to the opening, and the reinforcement effect can be further improved. For example, when a square frame member is formed of channel steel, H-shaped steel, or I-shaped steel, which is a structural steel material, it is preferable because it has a cross-sectional shape that can sandwich a foundation or a cloth-shaped foundation from both sides.

  Since the seismic reinforcement frame according to the present invention is a rectangular frame member attached to the four surfaces around the opening, the central portion of the opening can maintain its function as the opening. That is, the air permeability as a ventilation port and the size as a person passage are not impaired. Furthermore, a seismic reinforcement frame that incorporates the function of the underfloor vent is also possible.

  The seismic reinforcement frame according to the present invention can be easily applied to an existing building without processing the cloth foundation or foundation. In addition, even when there is no person passage, it can be provided without structural anxiety, and the basic strength can be maintained. In the case of a newly built building, the seismic reinforcement frame can also be used as an opening formwork, in which case the integrity of the seismic reinforcement frame and the fabric foundation is particularly good.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
The seismic reinforcement frame according to the present invention is suitable for an opening in a cloth foundation of a low-rise building, particularly a low-rise wooden building. The cloth-like foundation is a continuous cloth-like underground beam, and the rising portion exposed to the ground surface takes the form of a vertical wall that is continuous in the horizontal direction. The “cloth foundation” in the present invention includes not only the cloth foundation in the so-called cloth foundation construction method but also the continuous vertical wall portion on the foundation slab in the solid foundation construction method. Moreover, this invention is applicable irrespective of the freezing depth which is the depth of the underground part of a cloth-like foundation.

2A and 2B show an embodiment in which the seismic reinforcement frame 1 of the present invention is applied to the opening 14 of the internal cloth-like foundation 12 shown in FIG. 1A, where FIG. 2A is a side view and FIG. (C) is B sectional drawing.
The opening 14 serving as a personal entrance is formed as a rectangular cut-out portion that extends downward from the top edge of the cloth-shaped foundation 12, and the three surfaces of the left and right surfaces and the bottom surface are formed of a cloth-shaped foundation 12 made of reinforced concrete. This is the aspect. In this embodiment, since the base 17 is placed on the top end of the cloth foundation 12, the upper surface of the opening 14 is formed by the lower surface of the base 17. The seismic reinforcement frame 1 includes four side members 1a, 1b, 1c, and 1d that form one rectangular frame member. Each of the side members 1 a to 1 d has an attachment surface that abuts against each surface surrounding the opening 14. Here, channel steel is used as each side member. The channel steel is one of structural steel materials and has a U-shaped cross-section, and includes a central plate and a pair of parallel side plates extending perpendicularly in one direction from both ends thereof.

In the side member 1a, the inner surface of the center plate of the groove steel abuts the lower surface of the base 17 as an attachment surface, and the pair of side plates of the groove steel sandwich the base 17 from both sides. As shown in FIG. 2 (b), the base 17 is just fitted inside the channel steel of the side member 1a.
In the side members 1b and 1c, the inner surface of the center plate of the channel steel abuts against the surface of the cloth foundation 12 which is the left and right surfaces of the opening 14 as attachment surfaces, and the pair of side plates of the channel steel are cloth. The shaped foundation 12 is sandwiched from both sides. Further, as shown in FIGS. 2B and 2C, in this embodiment, the widths w1 of the side members 1b and 1c are wider than the width w2 of the cloth-like foundation 12. A present Example is an example at the time of applying to the existing cloth-like foundation 12, and the seismic reinforcement frame 1 can be installed, without processing the existing cloth-like foundation 12. FIG.
In the side member 1d, the outer side of the center plate of the channel steel abuts on the surface of the cloth-like foundation 12 which is the lower surface of the opening 14 as an attachment surface, and the entire length extends between the side members 1b and 1c. Since the vertical dimension of the opening 14 is reduced by the height of the side member 1d, it is preferable to set the height of the side member 1d so as not to impair the function of the opening 14.

  In the illustrated example, the four side members 1a to 1d constituting the square frame member of the seismic reinforcement frame 1 are rigidly joined at the four corners of the square frame. The specific joining means is not shown in the figure, but is adhesive bonding using an adhesive such as welding, high tension bolt fastening, or carbon fiber or other high tensile strength chemical fiber. An auxiliary joining metal fitting (an angle such as an L shape) may be used. As the material of the seismic reinforcement frame 1, a shape steel having a linear shape or a structural steel material is suitable. Steel is widely used as a strong building member, and is inexpensive and easy to process. Or what processed the thick steel plate or the alloy plate may be used. As another example, the rectangular frame member may be other metal material. As yet another embodiment, the rectangular frame member may be formed from a material obtained by prepregizing chemical fibers such as hard artificial wood, precast concrete, and carbon fiber.

  The “four side members” in the present invention means the shape of the rectangular frame member of the seismic reinforcement frame 1 and does not mean the manufacturing process. That is, it is not always necessary to perform the step of first forming four side members and joining the two end portions to form a square frame. For example, a rectangular frame can be formed by joining four L-shaped members. Further, two U-shaped members can be face-to-face joined and have a dimension adjusting function to form a rectangular frame.

However, when the seismic reinforcement frame 1 as illustrated in the existing opening 14 is attached, it cannot be attached to the opening after the rectangular frame member is completed. In that case, after attaching each member which comprises the earthquake-proof reinforcement frame 1 sequentially, a square frame member is completed by mutually joining. For example, when using four side members 1a to 1d that are not joined, first, the side member 1a is fitted and attached to the base 17, and then the side members 1b and 1c are fitted to the left and right cloth bases 12. At last, the side member 1d is attached to the cloth-like foundation 12.
As another method, it is also possible to insert a seismic reinforcement frame as a completed square frame member from the front of the existing opening and attach the side surface of the seismic reinforcement frame as an attachment surface.
In the case of a new construction, the seismic reinforcement frame 1 can be used as a concrete placement form for the opening 14 of the cloth foundation 12. In that case, after completing the rectangular frame in advance (or after completing at least the left and right and the lower three sides), it is installed as a mold.
Specific means for attaching the seismic reinforcement frame 1 to the cloth foundation 12 and the base 17 will be described with reference to FIG.

3A and 3B show an embodiment in which the seismic reinforcement frame 2 of the present invention is applied to the opening 13 of the outer fabric base 11 shown in FIG. 1A, where FIG. 3A is a side view and FIG. (C) is D sectional drawing.
A seismic reinforcement frame 2 using channel steel is attached to the opening 13 which is a ventilation opening. The embodiment of FIG. 3 differs from the above-described embodiment of FIG. 2 only in the size of the opening 13, and is otherwise the same as the embodiment of FIG.

4A and 4B show another embodiment in which the seismic reinforcement frame 1 of the present invention is applied to the opening 14 of the inner cloth-like foundation 12 shown in FIG. 1A. FIG. 4A is a side view, and FIG. Sectional drawing and (c) are F sectional drawings.
The seismic reinforcement frame 1 using grooved steel is attached to the opening 14 which is a person passage. The embodiment of FIG. 4 differs from the embodiment of FIG. 2 described above in that the width w1 of the side members 1b and 1c is the same as the width w2 of the normal portion of the cloth-like foundation 12. Therefore, in the vicinity of the left and right surfaces of the opening 14, it is necessary to reduce the width (indicated by w2 ′) of the cloth-like foundation 12 by the thickness of the side members 1b and 1c. Since it is difficult to cut the width of the existing cloth-like foundation 12, this embodiment is suitable for a new construction. If the seismic reinforcement frame 1 is used as a mold for the opening 14 of the cloth-like foundation 12, it can be easily constructed. The other points are the same as the embodiment of FIG.

5A and 5B show another embodiment in which the seismic reinforcement frame 2 of the present invention is applied to the opening 13 of the outer fabric base 11 shown in FIG. 1A, where FIG. 5A is a side view and FIG. Sectional view, (c) is an H sectional view.
A seismic reinforcement frame 2 using channel steel is attached to the opening 13 which is a ventilation opening. The embodiment of FIG. 5 differs from the above-described embodiment of FIG. 4 only in the size of the opening 13, and is otherwise similar to the embodiment of FIG.

6A and 6B show an embodiment in which the seismic reinforcement frame 3 of the present invention is applied to the opening 14 of the internal cloth foundation 12 shown in FIG. 1A, where FIG. 6A is a side view and FIG. (C) is J sectional drawing.
A seismic reinforcement frame 3 made of H-shaped steel is attached to the opening 14 which is a traffic passage. The seismic reinforcement frame 3 includes four side members 3a, 3b, 3c, and 3d that form a rectangular frame. Each of these side members 3 a to 3 d has an attachment surface that abuts against each surface surrounding the opening 14. Here, H-section steel is used as each side member. The H-shaped steel is one of structural steel materials and has an H-shaped cross-section, and includes a central plate and a pair of side plates extending in parallel to each other at right angles in both directions.

In the side member 3a, the upper side of the center plate of the H-shaped steel comes into contact with the lower surface of the base 17 as an attachment surface, and the upper half of the pair of side plates of the H-shaped steel sandwiches the base 17 from both sides. As shown in FIG. 6B, the base 17 is just fitted inside the H-shaped steel of the side member 3a.
In the side members 3b and 3c, one of the pair of side plates of H-shaped steel is in contact with the surface of the cloth-like foundation 12 which is the left and right surfaces of the opening 14 as an attachment surface.
In the side member 3d, the lower side of the center plate of the H-shaped steel comes into contact with the surface of the cloth-shaped foundation 12 which is the lower surface of the opening 14 as an attachment surface, and the lower half of the pair of side plates of the H-shaped steel has the cloth-shaped foundation 12 Is sandwiched from both sides. In the sandwiched portion, the cloth-like foundation 12 has a width w2 ′ narrower than the width w2 of the normal portion. The width w1 of the H-shaped steel is the same as the width w2 of the normal part of the cloth-like foundation 12. Since it is difficult to cut the width of the existing cloth-like foundation 12, this embodiment is suitable for a new construction. If the seismic reinforcement frame 3 is used as a mold of the opening 14 of the cloth-like foundation 12, it can be easily constructed.
In this embodiment, since the width of the side members 3a to 3d narrows the vertical and horizontal dimensions of the opening 14, it is preferable to set the width of the side members 3a to 3d so as not to impair the function of the opening 14. The other points are the same as the embodiment of FIG.

FIG. 7 is another embodiment in which the seismic reinforcement frame 4 of the present invention is applied to the opening 13 of the outer circumferential cloth-shaped foundation 11 shown in FIG. 1A, where (a) is a side view and (b) is K. Sectional view, (c) is an L sectional view.
A seismic reinforcement frame 4 using H-shaped steel is attached to the opening 13 which is a ventilation opening. The embodiment of FIG. 7 differs from the above-described embodiment of FIG. 6 only in the size of the opening 13 and is otherwise the same as the embodiment of FIG.

  FIG. 8A is an external perspective view of the seismic reinforcement frame 1 shown in FIG. The side members 1a to 1d are channel steel and include a central plate 1a2 and a pair of side plates 1a1 on both sides thereof. The square outer peripheral surfaces formed by the central plates 1a2, 1b2, 1c2, and 1d2 of the channel steels 1a to 1d serve as attachment surfaces that contact the inner peripheral surface of the opening.

  FIG. 8B is an external perspective view of the seismic reinforcement frame 3 shown in FIG. The side members 1a to 1d are H-shaped steel, and include a central plate 3a2 and a pair of side plates 3a1 on both sides thereof. A square outer peripheral surface formed by the central plates 3a2, 3d2 of the H-shaped steels 3a, 3d and one side plates 3b1, 3c1 of the H-shaped steels 3b, 3c serves as a mounting surface that comes into contact with the inner peripheral surface of the opening. .

FIG. 9 is a side view showing an example of means for firmly attaching the seismic reinforcement frame of the present invention to the cloth foundation 12 and the base 17. The seismic reinforcement frame 1 shown in FIGS. 2 and 4 will be described as an example, but the same applies to other embodiments.
When anchor bolts are used for joining the seismic reinforcement frame 1 and the cloth-like foundation 12, it is as follows.
In the case of a new construction, the anchor bolt 31 is installed and the base of the anchor bolt 31 is buried before the concrete of the cloth foundation 12 is placed, and the head is exposed.
For the existing cloth-like foundation 12, a hole for female screw insert is formed in the cloth-like foundation 12, the female screw insert is driven into the hole, and the base of the anchor bolt 31 is screwed into the female screw insert. Insert the head of the anchor bolt into the seismic reinforcement frame 1 and fasten it with a nut. Alternatively, a chemical anchor may be used.

  When bolts 32 and nuts are used for joining the earthquake-resistant reinforcement frame 1 and the base 17, bolt holes are drilled in both the earthquake-resistant reinforcement frame 1 and the base 17, the bolts 32 are inserted, and the nuts are fastened. Alternatively, the seismic reinforcement frame 1 and the base 17 may be tightened from the side surface using a high strength screw.

  Although not shown, it is natural that the left and right frames of the seismic reinforcement frame 1 are fixed to the cloth-like foundation 12 with anchor bolts or the like.

  10 (a) to 10 (e) are diagrams showing other examples of the cross-sectional shape of the side members constituting the seismic reinforcement frame of the present invention. (a) is, for example, an I-shaped steel and is used in the same manner as the H-shaped steel described above. (B) is, for example, a CT section, and uses a wide surface as a mounting surface. A square steel pipe having a flat surface as in (c) and (d) can also be used. Moreover, the raw material which prepregized chemical fibers, such as hard artificial wood provided with the square flat surface, precast concrete, and carbon fiber, can also be utilized. Although it is not a symmetrical shape as in (e), an L-shaped steel having a flat surface can also be used.

  FIG. 11 is a side view showing another embodiment of the seismic reinforcement frame of the present invention. As a configuration for further reinforcing the above-mentioned seismic reinforcement frame, the canes 6 are provided at the four corners of the rectangular frame member. Alternatively, although not shown in the drawings, a steel plate having a triangular side surface is welded using an L-shaped angle, or a reinforcing metal fitting having a triangular side surface is attached to four corners by bending the steel plate into an L shape. Thereby, the cross-sectional area of the rectangular frame member itself can be reduced.

In each of the embodiments shown in FIG. 2 to FIG. 7 and FIG. 9 above, the three surfaces of the left and right surfaces and the lower surface among the four surfaces surrounding the openings 13 and 14 are surfaces formed by the cloth foundations 11 and 12, and the upper surface is This is applied when the surface is the base 17. The configuration of the opening to which the present invention is applied is not limited to this, and as shown in FIGS. 1B (d) (e), all four surfaces surrounding the openings 13 and 14 are surfaces by the cloth-like foundations 11 and 12. Some cases are also included. That is, in the “opening formed as the cutout portion of the cloth-like foundation” in the present invention, not only the rectangular opening portion in which one side is surrounded by the cloth-like foundation but the four sides are provided. It also includes a rectangular opening surrounded by a cloth-like foundation.
For example, when the seismic reinforcement frame 1 shown in FIG. 2 is applied to the opening 14 shown in FIG. 1B (e), the side member 1a located on the upper surface forms part of the cloth-like foundation 12 that forms the upper surface of the opening 14 on both sides. It will be sandwiched from the surface. Or depending on the height of the side member 1a, both a part of the cloth-like foundation 12b and a part of the base 17 are sandwiched from both side surfaces. Further, although not shown in the drawings, the present invention can naturally be applied to an entrance / exit when the height of the foundation is high or an opening of a light window.

FIGS. 12A and 12B are basic stress diagrams schematically showing the effects of the present invention, and illustrate the case where the opening 14 is provided in the cloth-like base 11. A seismic reinforcement frame 1 having a square frame member is attached inside the square-shaped opening 14 of the cloth-like foundation 11 so as to be structurally integrated with the cloth-like foundation. In the opening of the cloth-like foundation that was not provided directly under the wall, the vertical strength against the load P of the building (bending moment M ₀ , shearing force Q ₀ ) was equal to or greater than that of the continuous cloth-like foundation. (See FIG. 12A). Thereby, the opening part of a predetermined magnitude | size can be provided in a free position, and it can design freely as a ventilation property under a floor, a person vent, and piping space. On the other hand, it is possible to reinforce the opening is large stress such by bending or bending moment M ₁ to produce a ground improvement columnar piles and PC pile reinforcement foundation was Da設in soft ground (see Figure 12 (b)). As a result, the strength of the foundation in the portion where the opening is present can be ensured to be equal to or higher than that of the portion where the opening is not present. That is, it is possible to maintain a proof strength having a certain rigidity as a continuous cloth-like underground beam regardless of the presence or absence of an opening. Thereby, the same stress diagram as that in the case of the continuous cloth-like underground beam shown in FIGS. 12 (a) and 12 (b) is obtained. The square frame member has mounting surfaces that abut each of the four surfaces surrounding the opening, so that the integrity of the seismic reinforcement frame and the opening is reinforced, and the opening is structurally structured with rigidity and strength. Can be supported.

(a) is an external appearance perspective view which shows an example of the cloth-like foundation method 10A, (b) is an external perspective view which shows an example of the solid foundation method 10B. (a)-(e) is an example of the opening parts 13 and 14 of the conventional cloth-like foundation reinforced with the reinforcing bar. It is the Example which applied the earthquake-proof reinforcement frame 1 of this invention with respect to the opening part 14 of the internal cloth-like foundation 12 shown to FIG. 1A, (a) is a side view, (b) is A sectional drawing, (c). Is a B cross-sectional view. It is the Example which applied the seismic reinforcement frame 2 of this invention with respect to the opening part 13 of the outer periphery cloth-shaped foundation 11 shown to FIG. 1A, (a) is a side view, (b) is C sectional drawing, (c). FIG. It is another Example which applied the seismic reinforcement frame 1 of this invention with respect to the opening part 14 of the internal cloth-like foundation 12 shown to FIG. 1A, (a) is a side view, (b) is E sectional drawing, c) is an F sectional view. It is another Example which applied the seismic reinforcement frame 2 of this invention with respect to the opening part 13 of the outer periphery cloth-shaped foundation 11 shown to FIG. 1A, (a) is a side view, (b) is G sectional drawing, c) is an H sectional view. It is the Example which applied the seismic reinforcement frame 3 of this invention with respect to the opening part 14 of the internal cloth-like foundation 12 shown to FIG. 1A, (a) is a side view, (b) is I sectional drawing, (c). FIG. It is another Example which applied the seismic reinforcement frame 4 of this invention with respect to the opening part 13 of the outer periphery cloth-shaped foundation 11 shown to FIG. 1A, (a) is a side view, (b) is K sectional drawing, c) is an L cross-sectional view. (a) is an external appearance perspective view of the earthquake-proof reinforcement frame 1 shown in FIG. 4, (b) is an external perspective view of the earthquake-proof reinforcement frame 3 shown in FIG. It is a side view which shows an example of the means to attach the earthquake-proof reinforcement frame of this invention to a cloth-like foundation and a foundation. (a)-(e) is the figure which showed the other Example of the cross-sectional shape of the side member which comprises the seismic reinforcement frame of this invention. It is a side view which shows another Example of the earthquake-proof reinforcement frame of this invention. It is a basic stress figure which shows the effect of the present invention typically.

Explanation of symbols

1, 2, 3, 4 Seismic opening frame 1a to 1d, 2a to 2d, 3a to 3d, 4a to 4d Side members of rectangular frame member 6 Cane 10A Cloth foundation method 10B Solid foundation method 11 Peripheral foundation 11a Base part 11b Standing up Part 12 Internal foundation 12a Base part (underground beam)
12b Rising part 13 Ventilation opening 14 Personnel opening 15 Foundation slab 16 Crushed stone 17 Base 21 Moisture-proof soil 31 Anchor bolt 32 Bolt

Claims (2)

A seismic reinforcement frame (1, 2, 3, 4) attached to a rectangular opening (13, 14) formed as a notch in a cloth foundation (11, 12), inside the opening possess abutting mounting surface (1a2~1d2) respectively four faces mounted four corners is the rigid joining rectangular frame members (1 a to 1 d) the provided and said Katachiwaku member surrounds the opening to,
Of the four surfaces surrounding the opening (13, 14), the left and right surfaces and the lower surface are surfaces formed by the cloth-shaped foundation (11, 12), and the upper surface is continuously mounted on the top end. A surface formed by the base (17) or by the cloth foundation (11, 12),
The portion of the rectangular frame member (1a to 1d) located on the upper surface of the opening (13, 14) sandwiches a part of the base (17) or the cloth-like foundation (11, 12) from both side surfaces thereof. An anti-seismic reinforcement frame for a cloth-like foundation opening, characterized by having a cross-sectional shape that can be used . Left side of the opening in the rectangular frame member, the portion located right surface or lower surface, a portion of the cloth-like foundation to claim 1, characterized in that it comprises a cross section which can be sandwiched from both sides thereof Seismic reinforcement frame for the cloth-like foundation opening described.

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