JP3522255B2 - Seismic retrofitting structure and construction method that also renovates existing veranda - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic retrofitting structure and a construction method which also serves to repair an existing balcony provided in an existing building.

[0002]

2. Description of the Related Art Regarding an existing veranda that is installed in a cantilever manner in an existing building, as a countermeasure against cracks in the veranda or water leakage due to rain leakage, support is provided at the time of repairing the existing building. Reinforced by
There was no choice but to reconstruct waterproofing, and in some cases dismantle the veranda and remake it.

When the balcony is dismantled and a new balcony is remade, the living space is narrowed and workers enter the exclusive portion of the building during the construction period. There are many problems such as temporary relocation of residents.

[0004]

DISCLOSURE OF THE INVENTION The present invention is to reconstruct a veranda without dismantling an existing veranda,
To provide a seismic strengthening structure and its construction method that does not narrow the living space and does not need to enter the exclusive part of the building during the construction period, and can also improve the seismic performance of the existing building, which also serves as a renovation of the existing veranda. With the goal.

[0005]

[Means for Solving the Problem] In order to advantageously solve the above-mentioned problem, in the seismic-proof reinforcement structure which also serves as a renovation of the existing veranda, the foundation is constructed outside the veranda of the existing building, On the foundation, an outer frame in which a precast pillar and a beam with a precast veranda support portion are integrated is constructed, and the precast veranda support is constructed.
The beam with the holding part should be projected laterally integrally with the beam part.
A veranda support is provided and the veranda support is
Installed over the entire length of the lower surface of the balcony.
The existing veranda is repaired and reconstructed by further arranging the veranda support part integrated with the beam under the existing veranda and integrating the veranda support part and the existing veranda. However, the seismic force acting on the existing building can be also applied to the outer frame through the veranda support portion.

Further, in the invention of claim 2, in the seismic-proof reinforcement structure which also functions as a repair of the existing veranda of claim 1, vertical holes penetrating through the existing veranda at intervals are provided, and An upward opening concave portion is provided in the veranda support portion so as to face the penetrating vertical hole, a connecting member is arranged across the penetrating vertical hole and the upward opening concave portion, and the grout is formed so as to embed the connecting member. Is filled and cured, and the veranda support portion and the existing veranda are integrated.

Further, according to the invention of claim 3, in the seismic-proof reinforcement structure which also serves as a repair of the existing veranda according to claim 1 or 2, in the vertical direction, a beam with a precast veranda support portion and a precast Columns and pillars are alternately arranged and prestressed by the tension of the PC steel materials arranged so as to be inserted therethrough, and they are integrated, and the precast veranda support is arranged in series in the left-right direction. It is characterized in that prestressing is applied to the beam with a precast veranda support portion to be integrated by tension of the PC steel material arranged so as to be inserted into the beam with a portion.

Furthermore, in the invention of claim 4,
In the seismic reinforcement structure that also serves as a renovation of the existing veranda according to any one of claims 1 to 3, an anchor member in which an end of a horizontal rebar exposed in a recess of the veranda support is embedded and fixed in an existing building. It is characterized in that it is connected to a connecting rebar whose one end side is connected to.

Further, in the invention of claim 5, in the seismic strengthening structure which also serves to repair the existing veranda according to any one of claims 1 to 4, a gap is provided between the veranda support portion and the existing veranda. Is provided, and grout is filled and cured in the gap to be integrated.

Furthermore, in the earthquake-proof reinforcement method which also serves as a renovation of the existing veranda of claim 6, outside the veranda of an existing building, and construction of the foundation, then on the basis, a pre-cast steel pillars, precast manufactured veranda support a Department with beams to build an integrated outer frame, the precast manufactured base
The beam with the lander support part is laterally projected to the beam part.
Veranda support portion provided we are in Suyo and veranda support
Part over the entire length of the lower surface of the existing balcony in the longitudinal direction.
It is arranged to support and arrange the veranda support part integrated with the beam below the existing veranda, and further repair the existing veranda by integrating the veranda support part and the existing veranda. It is characterized in that it is reconstructed so that the seismic force acting on the existing building can be also borne by the outer frame through the veranda support portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail based on the illustrated embodiments.

[0012] Figures 1-8, there is shown an embodiment of the present invention, so as to approach the outer side of the reinforced concrete porch 2 in existing building 1 of reinforced concrete apartment buildings such as high-rise, the ground 3 Foundation piles 4 such as reinforced concrete piles are spaced from each other in the left-right direction to the existing building 1
Are provided in parallel with. As the foundation 5,
The foundation pile 4 may be omitted and the foundation may be used directly. Depending on the ground conditions and whether the existing building is low-rise or medium-high rise, it may be appropriately set including a cloth foundation or an independent foundation. Or beams) will be built along the vertical plane.

On the upper part of the foundation pile 4, there is provided a reinforced concrete foundation 5 integrally connected to the foundation pile 4.
The vertical PC steel material 6a (6), which is made of PC steel rods, has an intermediate portion arranged in advance in the vertical sheath 19 at intervals in the left-right direction, and the lower end portion of the vertical PC steel material 6a (6) is made of steel. It is locked by a steel locking metal fitting 8 made of a female screw member that engages with the pressure member 7, and is embedded and fixed in the foundation 5. Also,
The vertical PC steel material 6a (6) is made to project upward from the upper surface of the foundation 5 by a predetermined distance, and the protruding dimension is the vertical PC steel material 6a.
In the case of a dimension which does not protrude from the beam 10 with the precast reinforced concrete veranda supporting portion which is installed while inserting (6a), as shown in FIG. 7, it is provided at the upper end of the vertical PC steel material 6 (6a). To the male thread 6c
PC steel material is properly connected by a coupler 26 described later,
Precast reinforced concrete balcony support beam 1
The size is appropriately set so as to project from zero.

A height adjusting mortar 9 such as a non-shrink mortar is provided on the entire upper surface of the bases 5, and adjacent bases 5 are provided.
Over the upper surface of the height-adjusting mortar 9, the base end side beam portion 11 of the precast reinforced concrete veranda support beam 10 having a substantially L-shaped cross section is placed,
A veranda support portion 12 is provided below the base end side beam portion 11 so as to integrally project in the lateral direction, and the veranda support portion 12 is arranged below the existing veranda 2 with a gap, Further, the tip of the veranda support portion 12 is arranged close to the front surface of the beam 21 of the existing building 1. In addition,
Between the ends of the adjacent beams 10 with precast reinforced concrete veranda support portions, joint mortar 9 for adjusting the gap and adjusting the unevenness is provided in the portion excluding the sheath 15.

Further, the beam portion 11 on the base end side is the existing veranda 2
Is located close to the front of the balcony
The lower surface of the tip of the building is the existing building 1 on the base side of the existing balcony 2.
Is temporarily mounted by being mounted on a temporary receiving metal fitting 24 provided with a supporting member 23 made of a steel L-shaped member fixed to the beam 21 in FIG. The temporary metal fitting 24 is composed of an anchor metal fitting 22 and a support member 23 fixed to the anchor metal fitting 22 by a bolt 25. Since the backup member 40 is press-fitted from below between the beam 21 and the tip end portion of the veranda support portion 12 of the temporary metal fitting 24, the lateral length of the support member 23 is relatively short. When attaching the temporary receiving bracket 24,
A plurality of lateral holes are formed in the beam 21 at intervals, and an anchor metal fitting 22 with a diameter-expanding piece having a diameter-expanding wedge having a female screw inside is inserted into each of the horizontal holes. The expansion member is expanded and deformed by the bolt 25 inserted into the bolt insertion through hole in the vertical portion of the support member 23 and screwed into the expansion wedge, and is crimped to the inner wall surface of the lateral hole to be anchored. Metal fittings 22
, And at the same time, the support fitting 23 is previously fixed to the beam 21 by the bolt 25.

Further, the foundation beam 21 or the beam 21 in the existing building 1 above the temporary metal fitting 24 is preliminarily provided with horizontal holes at right and left directions in the field, and the post-installed anchor member 31 is provided. It is fixed at a predetermined interval in the left-right direction, and then the female screw portion of the construction anchor member 31 is screw-connected to the base end portion of the connecting reinforcing bar 32.
The front end portions of are arranged at the lower surface of the veranda 2 so as to project laterally in the width direction of the veranda at intervals. Further, the projecting size of the connecting rebar 32 is the same as that of the veranda support portion 12.
It is set so as to be accommodated in the recess 13 described later. In the middle portion of the balcony 2 in the width direction (front-back direction), a large number of vertical through holes 33 for connection are provided at intervals in the front-rear direction and at intervals in the left-right direction. A large number of connection recesses 35 are provided so as to face the connection vertical through holes 33, and further, the veranda 2 is provided with grout injection vertical through holes 34.

The structure of the precast reinforced concrete veranda supporting portion beam 10 of this embodiment will be further described. The base end side beam portion 11 is diagonally spaced at the vertical direction and at the longitudinal direction. Direction lateral position, that is, a plurality of lateral sheaths 1 arranged laterally at the lower part of the front part and the lower part of the rear part and extending in the left-right direction to the left and right end parts
5 is embedded and fixed in advance. (See Figures 2 and 3)

In addition, a concave portion 13 which is continuous in the left-right direction is formed on the upper surface of the front end side (existing building side) of the veranda support portion 12.
Is provided toward the front portion side of the veranda support portion 12 in the width direction. In each of the recesses 13, the end portions of the horizontal reinforcing bars 16 made of deformed reinforcing bars or the like are exposed so that the end portions of the horizontal reinforcing bars 16 are located near the tip end portions of the recessed portions 13. The base end side of the horizontal reinforcing bar 16 is embedded and fixed in the veranda support portion 12. In this embodiment, the upper surface of the veranda support portion 12 is a gently inclined upper surface so that the level becomes low from the base end side toward the tip end,
It is arranged to be able to face the inclined surface of the lower surface of the existing veranda 2 substantially in parallel.

Further, a longitudinally arranged vertical sheath 17 extending in the vertical direction so as to penetrate to both upper and lower end portions is embedded and fixed in advance at the end portion of the base end side beam portion 11. The arrangement position of the vertical sheath 17 is provided so as to coincide with the central axis line of the vertical sheath 19 embedded in the precast reinforced concrete pillar 18 described later. Further, on the upper surface of the base end side beam portion 11, there are provided columnar vertical grooves 20 for fixing the handrail leg portion at intervals in the left-right direction. Further, on the upper surface of the veranda support portion 12, as described above, a large number of connection recesses 35 are provided at intervals in the front-rear direction and at intervals in the left-right direction.

The beam 10 with the veranda support portion made of precast concrete is made of the vertical PC steel material 6a (6).
When the PC steel material 6a is extended by inserting the PC steel material 6a, the precast concrete veranda support beam 10 is connected by a coupler 26 as shown in FIG. In the state,
With the joining end of the vertical PC steel material 6 (6a) protruding,
The PC steel material 6 to be connected next and the coupler 26 are arranged so that they can be connected.

After the precast reinforced concrete veranda-supporting beam 10 is installed on the foundation 5, the precast reinforced concrete veranda-supporting beam 10 is crossed over the transverse sheath 15 and cross PC steel material 6b (6).
8 is inserted and is strained by a tensioning device (not shown), and prestress is introduced into the beam 10 with the veranda support portion made of precast reinforced concrete.
As shown in (a), it is fixed by a fixing metal fitting 27 such as a nut engaged with the end portion of the horizontal PC steel material 6b (6), and as shown in FIG. 8 (b), the end portion of the PC steel material 6 is fixed. The rust-proofing treatment is performed by filling the concave portion 41 at the end portion of the beam 10 with the veranda supporting portion made of precast reinforced concrete with the anticorrosive material 43 such as mortar and embedding it.

After the precast reinforced concrete veranda support beam 10 is installed in this manner, the height adjusting mortar 9 is provided on the upper surface of the end of the precast reinforced concrete veranda support beam 10 in the left-right direction. The height adjusting mortar 9 can be connected to the vertical sheath 19 and the vertical sheath 17 in the precast reinforced concrete pillar 18 placed on the upper portion thereof,
It is provided in a portion excluding the vertical sheath 17, or a spacer (not shown) is appropriately installed.

Thus, the height adjusting mortar 9 is provided so as to extend over the end portion of the beam 10 with the veranda support portion made of precast reinforced concrete, or the end portion of the beam 10 with the veranda support portion made of precast reinforced concrete adjacent to it. The precast reinforced concrete pillar 18 is placed while inserting the vertical PC steel material 6, and the vertical PC steel material 6a protruding from the upper portion of the pillar 18 as shown in the lower part of FIG.
(6) is a fixing fitting 28 such as a nut screwed to the fixing fitting 28.
Is rotated and fixed in a tensioned state by a tensioning device (not shown) including a tensioning jack, and the pillar 18 is built in a predetermined position. In the precast reinforced concrete pillars 18 of this embodiment, the vertical sheath 17 is embedded and fixed so as to extend in the up-down direction while having a space in the left-right direction at the center in the front-rear direction.

Thereafter, a new PC steel material 6 is added to the vertical PC steel material 6a (6) by appropriately interposing a coupler 26, and an appropriate height adjusting mortar 9 is provided on an upper portion of a precast reinforced concrete column 18 to make a precast material. Installation of the beam 10 with a reinforced concrete veranda support, tension fixation of the lateral PC steel material 6b inserted through the lateral sheath 15, and precast reinforced concrete pillar 18
Of the vertical direction and the upper end of the vertical PC steel material 6a inserted through the precast reinforced concrete veranda-supported beam 10 on the uppermost floor is fixed by a tensioning device (shown in the figure). Was omitted)
As shown in the upper part of FIG. 7, while the whole PC steel material 6 in the vertical direction is tensioned to a predetermined value, a nut or the like engaged with the upper surface of the recess 41 at the upper end of the vertical PC steel material 6 is fixed. It is fixed by the metal fitting 27 and is subjected to anticorrosion treatment by the anticorrosion material 43 filled in the recess 41. In this way, the outer frame 30 in which the precast pillars 18 and the precast veranda support beam 10 are integrated on the foundation 5 is constructed.

Next, the connection between the veranda support 12 and the existing building 1 and the connection between the veranda support 12 and the existing veranda 2 will be described.

First, for example, in order to join the connecting rebars 32 and the horizontal rebars 16 by welding, the veranda 2 is appropriately partially attached (not shown), and FIGS.
As shown in (a), the connecting rebar 32 and the horizontal rebar 16 are joined by welding, or the above-mentioned fishing and the connecting rebar 32 and the horizontal rebar 16 are not joined by welding, and instead of these, Reinforcing bars 32 and 16 are joined and integrated through the grout 39 by filling and hardening of the grout 39 described later. Further, the reinforcing rods 32 and 16 are connected to the connecting through holes 33 of the veranda 2 and the connecting concave portion 35 of the veranda support portion 12, and the peripheral side. A connecting member 38 made of a short pipe having a large number of through holes 37 penetrating therethrough is arranged in the portion, and synthetic resin foam is provided between the tip of the veranda support 12 and the tip of the beam 21 of the existing building 1. With the backup material 40 made of wood material being installed, the grout 3 made of mortar through the vertical through holes 34 for pouring grout
9 is filled with the lower surface of the veranda 2 and the veranda support 1.
2 and the front side of the veranda 2 and the inside and outside of the connecting member 38 are filled with grout 39 such as mortar and cured, and the veranda support portion 12 is formed.
To the existing building 1, and the veranda support portion 12
And the existing veranda 2 can be integrated.

Further, the existing handrail 42 is removed, and the lower end of the leg of the new handrail 42 is embedded and fixed in the vertical groove 20. Further, grout is filled in the gap between the sheaths 17 and 19 and the PC steel rods 6a and 6b.

In this way, the existing building 1 including the veranda support portion 12 and the existing veranda 2 is integrated, the existing veranda 2 is refurbished and reconstructed, and the existing building 1 is added to the existing building 1 via the veranda support portion 12. The seismic force acting on the outer frame 30 is configured to be borne by the outer frame 30, and the structure has an earthquake-proof reinforcing structure that also serves as a repair of the veranda.

In this embodiment, the existing veranda 2 is used.
Since the handrail is removed and the handrail is changed to the position on the side of the beam 10 with the veranda supporting portion made of precast reinforced concrete, the widthwise dimension of the veranda can be increased.

Further, in this embodiment, since the veranda support portion 12 is arranged and supported over substantially the entire length of the lower surface of the existing veranda 2 in the longitudinal direction, it can be firmly integrated.

Although not shown in the drawings, the joints 10 between the adjacent beams 10 of the precast reinforced concrete veranda support portion, the joints 10 of the precast reinforced concrete veranda support portion 10 and the precast reinforced concrete columns 18 are filled with caulking material. Although not shown, a rain gutter, a boundary wall (a partition wall plate adjacent to the gutter), and the like are attached as appropriate.

Next, the construction procedure of the method of the present invention will be briefly described. After constructing a pile foundation 4 on the outside of the veranda 2 of the existing building 1, if necessary, a reinforced concrete foundation 5 is built integrally with this, or a split chestnut or the like is laid on the ground 3 to form the reinforced concrete foundation 5 The mortar 9 for adjustment is appropriately provided so as to be built and then supported by the foundation 5, and the beam 10 with the precast veranda support portion is installed so as to insert the PC steel material 6 and the PC to be inserted therethrough. The steel material 6 is tensioned and installed by prestressing the beam 10 with the fixing metal fitting 28.
The precast concrete pillars 18 are installed so that the PC steel materials 6 inserted into the pillars 18 are tensioned and fixed by the fixing metal fittings 28 to stabilize the pillars 18.
The height adjusting mortar 9, the precast veranda support beam 10, the adjusting mortar 9 on the adjacent end side, and the precast concrete pillar 18 are provided, and the PC steel material 6 (6a, 6b) is tensioned and fixed. Then, the outer frame 30 is constructed.

In this case, the existing building 1 and the outer frame 30 may be integrated on a plurality of floors, but the veranda support portion 12 and the existing building 1 are connected to each other by welding the reinforcing bars, and the veranda support portion is also connected. The 12 and the existing veranda 2 are integrated by the grout 39 sequentially from the lower floor for each floor, but the outer frame 30 which is sequentially built from the lower to the upper is built with the existing building 1 integrated. It is preferable because it will be done.

In carrying out the present invention, the temporary receiving metal fitting 24 for temporarily supporting the precast reinforced concrete veranda supporting part beam 10 is provided after the precast reinforced concrete veranda supporting part beam 10 and the existing veranda 2 are integrated. , May be removed. In addition, the backup material 40
May be removed after the grout 39 has hardened.

As the PC steel material 6, it is preferable to use a PC steel rod with a screw or a PC steel wire having a male threaded portion at the end, because the coupler 26 can be connected in series.

In the above embodiment, the precast reinforced concrete veranda support beam 10 or the precast reinforced concrete column 18 located at the middle portion in the up-down direction or the left-right direction is used as the PC steel material 6 made of a PC steel rod separate from the coupler 26. I tried to build it while tightening it with a nut that is screwed to the
You may build it while tensioning only with 6.

After the precast reinforced concrete columns 18 are first built on the foundation 5, the precast reinforced concrete veranda supporting beam 10 is attached to the columns 18.
Placed on the following, below, precast reinforced concrete pillar 1
Alternatively, the outer frame 30 may be constructed by alternately arranging 8 and the beam 10 with the precast reinforced concrete veranda support portion. In addition, you may make it arrange | position the precast reinforced concrete pillars 18 in series, and fix the base end side beam part 11 of the beam 10 with a precast reinforced concrete veranda support part to the adjacent pillars 18. In this case, The precast reinforced concrete pillar 18 may be provided with a laterally projecting support portion for supporting the base end side beam portion 11 as appropriate. Moreover, in the illustrated embodiment, the vertical through holes 34 for grout injection are provided at a plurality of positions at appropriate intervals, but the vertical through holes 34 for grout injection are not provided, and a large number of through holes 33 for connection are provided. The grout material 39 may be filled from the through hole 33 for connection, which is appropriately selected from the above.

[0038]

According to the present invention, a strong outer frame in which a beam with a precast veranda supporting portion and a precast pillar are integrated on the foundation outside the existing building without disassembling the existing veranda. Can be built and said precast
The beam with a veranda support made of steel is stretched laterally integrally with the beam.
A veranda support is provided so that it protrudes, and
The support is almost the entire length of the lower surface of the existing balcony.
The outer frame and the existing veranda are integrated via the veranda support part so that they are arranged across and supported, so the existing veranda is used to repair and reconstruct the veranda with a relatively simple structure. In addition, it is possible to improve the seismic performance of the existing building by seismically reinforcing the existing building with the outer frame integrated with the existing building without narrowing the living space. Moreover, support for the balcony
Part is placed over the entire length of the existing balcony in the longitudinal direction.
Since the entire existing balcony is stable,
It can be supported by the support part.

According to a second aspect of the present invention, vertical holes penetrating in the lateral direction of the existing veranda are provided at intervals, and the veranda support portion is provided with an upward opening concave portion so as to face the penetrating vertical hole. Is provided, a connecting member having a large number of through-holes is arranged across the through-holes and the upward opening recesses, grout is filled and cured so as to embed the connecting member, and a veranda support portion and an existing veranda are provided. Since the veranda support part and the existing side veranda can be firmly integrated with each other, the existing building and the outer frame can be firmly integrated, and the seismic force acting on the existing building during an earthquake (Horizontal force, etc.) can also be applied to the outer frame to reinforce the existing building's seismic resistance, thus improving the seismic performance of the existing building.

Further, as in claim 3, in the vertical direction,
The precast veranda supporting beam and the precast pillar are alternately arranged, and are prestressed and integrated by the PC steel material that is arranged so as to be inserted therethrough, and they are connected in the left-right direction in series. When the precast veranda support beam is integrated with the precast veranda support part beam by prestressing the precast veranda support part beam, the beams and columns can be easily connected to the PC steel material. Can be integrated with each other, and a plurality of beams arranged in series in the lateral direction can be integrated,
The outer frame in which the pillar and the beam are integrated can be easily configured.

According to a fourth aspect of the present invention, the end portion of the horizontal reinforcing bar exposed in the recess of the veranda supporting portion is a connecting reinforcing bar whose one end side is connected to the anchor member embedded and fixed in the existing building body. When connected, the veranda support part and the existing building can be easily connected. Further, since the connecting rebar can be arranged in the recess, the veranda support portion can reduce the dead space with the lower floor.

Further, when a gap is provided between the veranda support portion and the existing veranda and the gap is filled and hardened to be integrated with each other, as described in claim 5,
The veranda support portion and the existing veranda can be integrated by a simple means.

Further , according to the invention of claim 6 , an outer frame can be constructed by a beam with a precast veranda support portion and a precast pillar supported by a foundation outside the existing building, and the precast veranda support portion is provided. The beam is the beam part
The veranda support is installed so that
And the veranda support is attached to the bottom of the existing veranda.
To be placed and supported over almost the entire length in the longitudinal direction
Moreover, since the outer frame and the existing side balcony are integrated via the veranda support portion, it is possible to easily rebuild the veranda economically in a short construction period using the existing veranda without disassembling the existing veranda. In addition, the living space will not be narrowed, and at the same time, it will not be necessary to enter the exclusive part of the building during the construction period. Can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a building in which an earthquake-proof reinforcement structure that doubles as an existing veranda of the present invention is implemented.

2 is a vertical side view of FIG.

3 is a vertical side view of FIG. 1 showing the vicinity of a grout injection hole and a connection recess.

FIG. 4A is a vertical sectional side view in which a part of FIG. 2 is enlarged,
FIG. 4B is an enlarged vertical side view of a portion of FIG. 3, and FIG. 4C is an enlarged view of a portion of FIG.

FIG. 5 is a partially cutaway plan view showing the vicinity of the veranda in an enlarged manner to show the arrangement of the injection hole and the connecting vertical through hole.

6 is a schematic cross-sectional plan view of FIG.

FIG. 7 is a partially longitudinal side view showing the vicinity of the upper end of the PC steel material in the longitudinal direction and the vicinity of the intermediate joint.

FIG. 8 (a) is a vertical sectional front view showing the vicinity of one end of the PC steel material in the horizontal direction, and FIG. 8 (b) is a vertical sectional front view showing a state in which rust prevention treatment is performed.

FIG. 9 is a vertical sectional side view showing the vicinity of a balcony of an existing building.

[Explanation of symbols]

1 Existing building 2 Reinforced concrete veranda 3 ground 4 foundation piles 5 Reinforced concrete foundation 6 PC steel 6a Vertical PC steel 6b Horizontal PC steel 6c Male thread 7 Bearing member 8 metal fittings 9 Height adjustment mortar 10 Precast concrete beam with veranda support 11 Base end beam 12 Veranda support 13 Recesses that are continuous in the left-right direction 15 Horizontal sheath 16 horizontal rebar 17 Vertical sheath 18 Precast reinforced concrete columns 19 Vertical sheath 20 vertical grooves 21 Beam (existing building side) 22 Anchor bracket 23 Support member 24 Temporary bracket 25 volts 26 Coupler 27 fixing bracket 28 Fixing bracket 30 outer frame 31 Post-installed anchor members 32 connecting rebar 33 Through hole for connection 34 Vertical through hole for grout injection 35 Connection recess 37 Horizontal through hole 38 Short tube for connection 39 grout 40 backup material 41 recess 42 handrail 43 Anticorrosion material

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04G 23/02 E04B 1/00 501

Claims (6)

(57) [Claims] On the outside of the claim 1 Existing Buildings veranda, while construction of the foundation, on the basis, to build a precast made pillars, the outer frame is precast manufactured veranda supporting section with beams are integrated, manufactured by the precast Beam with balcony support
Is a veranda so that it will overhang laterally integrally with the beam part
The support part is provided and the veranda support part is
The lower surface of the da is arranged and supported over almost the entire length in the longitudinal direction.
It is arranged to further arrange the veranda support portion integrated with the beam below the existing veranda, and by integrating the veranda support portion and the existing veranda, the existing veranda is repaired and rebuilt, and A seismic strengthening structure that also serves as a renovation of an existing veranda, characterized in that the seismic force acting on an existing building can also be carried by the outer frame via a veranda support portion. 2. The existing veranda is provided with vertical holes penetrating in the lateral direction at intervals, and the veranda supporting portion is provided with an upward opening concave portion so as to face the penetrating vertical hole, and the penetrating hole is formed. The connecting member is arranged across the vertical hole and the upward opening concave portion, the grout is filled and hardened so as to embed the connecting member, and the veranda supporting portion and the existing veranda are integrated. 1
Seismic reinforcement structure that doubles as an existing veranda described in. 3. A precast veranda support beam and a precast column are alternately arranged in the vertical direction, and prestress is applied by tension of a PC steel material arranged so as to be inserted therethrough. Prestress is applied to the precast balcony support beam by the tension of the PC steel material that is integrated and is inserted so as to be inserted in the precast veranda support beam that is arranged in series in the left-right direction. The seismic reinforcement structure that also serves as a repair of the existing veranda according to claim 1 or 2, wherein the structure is integrated. 4. The end portion of the horizontal reinforcing bar exposed in the recess of the veranda supporting portion is connected to a connecting reinforcing bar whose one end side is connected to an anchor member embedded and fixed in an existing building. A seismic retrofit structure that doubles as a renovation of an existing veranda according to any one of claims 1 to 3. 5. A gap is provided between the veranda support portion and the existing veranda, and grout is filled and cured in the gap to be integrated.
Seismic reinforcement structure that doubles as a renovation of the existing balcony. 6. outside the existing buildings veranda, and construction of the foundation, then so as to be supported on the foundation to build a precast made pillars, the outer frame in a precast made veranda supporting section with beams, made the precast With veranda support
The beams are laid on the beam part so that they overhang laterally.
And a veranda support is provided on the existing veranda.
Is placed over the entire length of the lower surface of the binder in the longitudinal direction.
Is arranged to have, further arranged a veranda support part integral with the beam below the existing veranda, by further integrating the veranda support part and the existing veranda, repair and rebuild the existing veranda, A seismic strengthening method that also serves as a renovation of an existing veranda, characterized in that the seismic force acting on an existing building can also be carried by the outer frame via the veranda support portion.