JP2017031676A - Earthquake resistant reinforcement method and reinforcement device of existing building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake resistant reinforcement method and a device capable of economically reinforcing a building of a steel frame structure in a short construction period while using a floor surface.SOLUTION: A rail 20 extending up to a predetermined position P1 opposed to a use-time floor surface 11 from a position P2 opposed to an empty floor surface 12, is arranged on a roof 3 of an existing building 1 of a steel frame structure, and a suspension device 30 is installed in the predetermined position vicinity Q1-Q6 of the roof 3, and a reinforcement steel frame 6b is slidably moved along the rail 20 from the empty floor surface 12, and the reinforcement steel frame 6b slidably moved up to a position Q1-Q6 of the suspension device 30 is re-hooked on the suspension device 30, and suspended up to the roof 3, and the roof 3 is reinforced by joining the suspended reinforcement steel frame 6b to an existing steel frame (a steel frame column 15 in an illustrated example). For example, the rail 20 is formed as a trolley beam joined via a suspension material 22 to an existing steel frame 5a of the roof 3, and a sliding movement device 40 is formed as a hoist slidably movably suspended by the trolley beam.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seismic reinforcement method and a reinforcing device for an existing building, and more particularly, to a construction method and a device for seismically reinforcing a building by adding a reinforcing steel frame inside an existing steel structure building.

  When retrofitting an existing building such as a steel frame factory, reinforcing columns (for example, steel beams, steel girders, brace materials, etc.) may be installed on the roof because the columns are wide and there are few walls. Conventionally, when adding a steel frame to the roof of a factory, etc., temporarily stop the production line inside the factory, move the production line to secure a space on the floor, and then bring a work machine etc. into that space. It is usual to adopt a method of erection of steel frames. However, once the production line is stopped, it may take a considerable amount of time to fully restore it, which may have a major impact on the business, so the operation of the production line is not stopped (while the floor is still used). You may be asked to make seismic reinforcement. As a method of reinforcing such a building, as shown in FIG. 5, a construction method has been proposed in which a temporary floor (protective gantry) is installed on the ceiling and a roof reinforcing steel frame is constructed from the temporary floor (Patent). Reference 1).

  FIG. 5A shows a plan view of the roof 3 of the factory 1 before reinforcement, and FIG. 5D shows a cross-sectional view of a line DD that intersects the depth direction of the factory 1. The factory 1 shown in the drawing is a steel building having a roof 3 assembled with a steel beam 5a, a steel beam 5b, a brace material 5c, etc., so that the first space 2a and the second space 2b are adjacent to each other. A production line 10 for machine tools, devices, etc. is arranged on the floor surface of each internal space 2a, 2b. FIG. 5C shows a roof plan view of the factory 1 after reinforcement, and FIG. 5E shows a cross-sectional view of a line EE intersecting the depth direction of the factory 1 after reinforcement. As can be seen from the comparison of floor plans before and after reinforcement, the roof 2 of the factory 1 after reinforcement is augmented with reinforcement beams 6a, reinforcement beams 6b, reinforcement brace material 6c, etc. (hereinafter collectively referred to as reinforcement steel frames 6). ing.

  FIG. 5B shows a plan view of the roof 3 when the reinforcing steel frame 6 is erected. First, the protective gantry 9 (temporary floor) is assembled on the ceiling at the corner of each internal space 2a, 2b, and each space 2a, 2b is divided into two upper and lower layers (upper construction area (protective gantry surface) and lower working area (floor). Surface)). Next, a plurality of temporary columns 7 are installed along the depth direction on both sides in the width direction of the internal spaces 2a and 2b, and temporary beams 8 extending from the protective gantry 9 in the depth direction are arranged at the upper ends of the temporary columns 7. The temporary beam 8 functions as a rail for sliding the reinforcing steel frame 6 assembled on the protective gantry 9 in the depth direction. On the upper protective gantry 9, the reinforcing steel frames 6 having the lengths in the width direction (one span length) of the spaces 2a and 2b are assembled, and the assembled reinforcing steel frames 6 are sequentially slid to a predetermined position on the temporary beam 8, Fig. 5 (C) without stopping the operation of the production line 10 on the lower floor (by using the floor) by joining the reinforced steel 6 moved to the position with the existing steel (columns, etc.) Further, the roof 3 can be reinforced as shown in (E).

JP 2012-112151 A

  However, the construction method shown in FIG. 5 has a problem that requires a construction period and cost in order to construct a strong temporary floor (protective gantry 9 and temporary beam 8) on the ceiling. That is, in FIG. 5 (B), the protective gantry 9 must support the weight of the reinforcing steel frame 6 for at least one span and be rigid enough not to be shaken during assembly, and the temporary beam (rail) 8 is also equivalent to one span. It is necessary to support the reinforcing steel frame 6 so that it is slid and moved, and it takes time to install such a strong protective gantry 9 or temporary beam 8. In addition, if it takes time to lay, the entire construction period of the reinforcement work becomes longer, which in turn increases the cost of the reinforcement work. The protective gantry 9 and the temporary beam 8 are temporary structures that are removed after the completion of the construction, and it is irrational and uneconomical to spend a lot of time and cost on the temporary construction. Development of a seismic reinforcement method that can economically perform steel roof reinforcement work without stopping the operation of the production line on the floor is desired.

  Accordingly, an object of the present invention is to provide a seismic reinforcement method and apparatus capable of economically reinforcing a steel structure building in a short construction period while using a floor surface.

  Referring to the embodiment of FIG. 1, the seismic reinforcement method for an existing building according to the present invention is a predetermined structure facing the floor 11 in use from a position P2 facing the empty floor 12 on the roof 3 of the existing steel building 1. The rail 20 extending to the position P1 is disposed (see FIGS. 1A and 1B), and the lifting device 30 is installed in the vicinity of a predetermined position Q1 to Q6 of the roof 3 (see FIGS. 1B and 1D). Then, the reinforcing steel frame 6b is suspended from the empty floor surface 12 and slid and moved to the rail 20 (see FIG. 1C), and the reinforced steel frame 6b slid to the positions Q1 to Q6 of the lifting device 30 is hung on the lifting device 30. It is lifted up to the roof 3 (see FIG. 1 (D)), and the lifted reinforcing steel frame 6b is joined to an existing steel frame (steel column 15 in the illustrated example).

  Referring also to the embodiment of FIG. 1, the seismic reinforcement apparatus for an existing building according to the present invention is a predetermined opposed to the floor 11 in use from the position P2 facing the empty floor 12 on the roof of the existing steel building 1. Rail 20 extending to position P1 (see FIGS. 1A and 1B), lifting device 30 (see FIGS. 1B and 1D) installed near a predetermined position Q1 to Q6 on the roof, and A slide moving device 40 (see FIG. 1 (C)) that suspends and slides the reinforcing steel frame 6b from the empty floor 12 to the rail 20 and slides it to positions Q1 to Q6 of the lifting device 30 is provided. It is hung on the lifting device 30 and lifted to the roof (see FIG. 1D), and the reinforcing steel frame 6b is joined to the existing steel frame (steel column 15 in the illustrated example).

  For example, as shown in FIG. 1 (C), a rail 20 is a trolley beam attached to an existing steel frame 5a of a roof 3 via a suspension member 22, and a slide moving device 40 is suspended on the trolley beam so as to be slidable. It can be.

  In a preferred embodiment, as shown in FIG. 1 (B), a plurality of lifting devices 30 are installed in parallel rows separated by a predetermined interval S from the rail 20 in the horizontal direction, and a reinforcing steel frame is shown in FIG. 1 (E). 6b is divided into a plurality of blocks 50a to 50f, each block 50 is suspended and slid on the rail 20, and the blocks 50a to 50f are slid to the positions Q1 to Q6 of the lifting devices 30, respectively. It is hung on 30 and lifted to the roof 3, and the lifted blocks 50a to 50f are connected to each other (see FIGS. 2 and 3).

  In a more preferred embodiment, as shown in FIGS. 2 (C) and 2 (D), a plurality of slide moving devices 40 are installed on the rail 20 and slided by different slide moving devices 40 up to positions Q1 and Q2 of each lifting device 30. The plurality of moved blocks 50a and 50b are joined to each other on the rail 20, and the joined blocks (50a + 50b) are hung on the lifting device 30 and lifted to the roof.

  The seismic strengthening method and apparatus for an existing building according to the present invention includes a rail 20 extending from a position P2 facing the empty floor surface 12 to a predetermined position P1 facing the used floor surface 11 on the roof 3 of the existing building 1 The lifting device 30 is installed in the vicinity of a predetermined position Q1 to Q6, the reinforcing steel frame 6b is suspended from the empty floor 12 by being slid and moved to the rail 20, and is slid to the positions Q1 to Q6 of the lifting device 30. 6b is hung on the lifting device 30 and lifted to the roof 3, and the lifted reinforcing steel frame 6b is joined to the existing steel frame 15. Therefore, the following advantageous effects are obtained.

(A) The rail 20 arranged on the roof of the building 1 is used to slide the reinforcing steel frame 6b from the empty floor surface 12 to the upper side of the in-use floor surface 11 where the production line or the like operates, and the reinforcing steel frame 6b is connected to the existing steel frame 15. Since the roof 3 is reinforced by joining, the roof 3 facing the floor can be reinforced without stopping the operation of the production line on the floor.
(B) Since the reinforcing steel frame 6b slid along the rail 20 is re-hanged on the lifting device 30 and the reinforcing steel frame 6b is lifted up to the roof by the lifting device 30, the level is the same as the rail 20 or higher than the rail 20. The reinforcing steel frame 6b can also be constructed.
(C) By installing the rail 20 and the lifting device 30 apart from each other in the horizontal direction by a predetermined distance S, both the rail 20 and the lifting device 30 are included in the space even when the space available for reinforcement under the roof is narrow. It is also possible to construct the reinforcing steel frame 6b by arranging.

(D) If an empty floor 12 is secured in a part of the building, there is no need to construct a strong structure such as a temporary floor on the ceiling, and only a simple rail 20 and lifting device 30 are installed. Since the roof can be reinforced without stopping, the construction period can be shortened and the cost can be reduced compared to the conventional method.
(E) By using the trolley beam attached to the existing steel frame 5a of the roof 3 via the suspension member 22 as the rail 20, it is not necessary to install a temporary pillar or the like for the rail as in the conventional construction method. The construction period can be shortened and the cost can be reduced, and the building can be economically reinforced while using the floor.
(F) By dividing and carrying the reinforcing steel frame 6b into a plurality of blocks 50a to 50f, the load applied to the rail 20 and the lifting device 30 can be kept small, and the rail 20 and the lifting device 30 can be further simplified and reduced in cost. Can be planned.

Hereinafter, embodiments and examples for carrying out the present invention will be described with reference to the accompanying drawings.
These are explanatory drawings of one Example of the earthquake-proof reinforcement apparatus of the existing building by this invention. These are the flowcharts of the earthquake-proof reinforcement method of this invention using the reinforced steel frame divided | segmented into the some block. These are the flowcharts of the earthquake-proof reinforcement method of this invention following FIG. These are explanatory drawings of an example of the rail used by this invention, a lifting device, and a slide movement apparatus. These are explanatory drawings of an example of a conventional seismic reinforcement method for existing buildings.

  FIG. 1 shows an embodiment in which the seismic reinforcement device of the present invention is applied to the roof 3 of an existing building 1 which is a steel-frame factory. FIG. 1 (A) shows a roof plan after reinforcement of the building 1, and an existing roof before reinforcement composed of a peripheral steel beam 5a and a steel girder 5b and a number of relatively small-diameter steel beams 5a inside. 3 indicates that the reinforcing steel frame 6 (reinforcing beam 6a, reinforcing beam 6b, etc.) with hatching is added to be reinforced. Further, the range surrounded by the axes X2-X3, Y2-Y5 in the interior of the building shows the floor surface 11 in use where the production line 10 for machine tools or the like is arranged, and the axes X3-X4, Y2-Y5 The enclosed area shows an unused empty floor 12 adjacent to the floor 11 in use.

  FIG. 1B shows an enlarged view of the oval part B in FIG. FIGS. 1C and 1D are side views taken along line CC and line DD in FIG. As shown in FIG. 1 (C), in a space with a height H1 (for example, about 3 m) to the existing roof 3 above the production line 10 of the building 1, reinforcement is performed at a predetermined position P1 slightly lower than the existing roof 3 by a distance H0. The steel frame 6b is bridged and joined to the existing steel frame (for example, the column 15). According to the present invention, the reinforcing steel frame 6b can be erected above the production line 10 without stopping the operation of the production line 10, that is, while continuing to use the floor surface 11. Hereinafter, the present invention will be described with reference to the illustrated examples. However, the application target of the present invention is not limited to a factory, and can be widely applied to existing steel-framed buildings that reinforce a roof. In addition, the present invention is applied not only to the seismic reinforcement of existing buildings, but also to the reinforcement of existing buildings for the purpose of snow damage countermeasures, or the case of reinforcing the roof of existing buildings for both earthquake resistance and snow damage countermeasures. Can be applied.

  The seismic reinforcement apparatus in the illustrated example includes a rail 20 extending from a position P2 facing the empty floor 12 of the roof 3 of the building 1 to a predetermined position P1 facing the floor 11 in use, and a predetermined position of the roof 3 There are a lifting device 30 installed at positions Q1 to Q6 in the vicinity of P1, and a slide moving device 40 that suspends the reinforcing steel frame 6b from the empty floor 12 and slides it on the rail 20. 1 (A) and 1 (B) show a case where a reinforcing steel frame (steel girder) 6b is erected on the street line Y4 of the building 1, and shows a straight rail 20 arranged in parallel with the street line Y4. ing. However, the rail 20 does not necessarily need to be linear, and may be bent along the way. In addition, as shown in FIG. 1C, the rail 20 can be arranged at the same height level as the construction position P1 of the reinforcing steel frame 6b. Further, in the illustrated example, the rail 20 is provided between the axis X3-X4 through one end P2 of the rail 20, but the rail 20 is located at an arbitrary position P2 (for example, between the path axes X7-X8) facing the empty floor 12 from a predetermined position P1. ) And the length of the rail 20 can be arbitrarily adjusted accordingly.

  FIG. 4 shows an example of the rail 20, the lifting device 30, and the slide moving device 40 in an enlarged manner. As illustrated, the rail 20 can be a trolley beam attached to the existing steel frame 5a of the existing roof 3 via a suspension member 22, for example. In the illustrated example, a suspension plate 21 is attached to a rail (trolley beam) 20 made of H steel, and a lower end attachment portion 24 of a suspension member 22 in which an upper end attachment portion 24 is joined to a steel beam 5a of an existing roof 3 is suspended from the rail 20. It is joined to the lower plate 21. The length of the suspension member 21 can be appropriately adjusted by the length adjusting unit 23. By suspending the rail 20 from the existing steel frame 5a in this way, there is no need to install a temporary pillar or the like for the rail installation as in the conventional construction method of FIG. 5, and the construction time and cost reduction of the rail installation are reduced. Can do. The structure of the rail 20 is not limited to the illustrated example. For example, the suspension member 22 may be omitted and the rail 20 may be directly joined to the existing steel frame 5a.

  Further, the lifting device 30 shown in FIG. 4 uses a hoist or a chain block attached to the existing steel frame 5a of the roof 3, for example. In the lifting device 30 shown in the drawing, an upper end attachment portion 31 is joined to a steel beam 5a of an existing roof 3, and a hook-shaped hook 33 is attached to the lower end of a suspension rope (chain) 32 extending downward. The reinforced steel frame 6b can be lifted by hooking the wire 45 on the reinforcing steel frame 6b using the staking clamp 44 and winding the wire 45 on the hook-shaped hook 33 to wind up the suspension cable 32. As shown in FIG. 4A, the lifting device 30 can be separated from the rail 20 by a predetermined distance S (for example, about 30 cm) in the horizontal direction and installed at the same height level as the rail 20 (FIG. 1B). See also).

  Moreover, the slide moving device 40 shown in FIG. 4 uses, for example, a hoist or a chain block suspended from a rail (trolley beam) 20 so as to be slidable. The slide moving device 40 in the illustrated example has a sliding attachment portion 41 at the upper end slidably locked to the trolley beam, and a hook-shaped hook 43 is attached to the lower end of a hanging rope (chain) 42 that extends downward for reinforcement. The slinging wire 45 can be hung on the hook-shaped hook 33 and hung on the steel frame 6b. As shown in FIG. 1B, a plurality of slide moving devices 40 can be locked to the rail (trolley beam) 20, and the reinforcing steel frames 6 b can be suspended while the loads are distributed by the plurality of slide moving devices 40.

  When the reinforcing steel frame 6b is constructed above the production line 10 using the seismic reinforcing apparatus of the illustrated example, the slide moving apparatus in which the reinforcing steel frame 6b is first carried on the empty floor surface 12 of the building 1 and locked to the rail 20 is used. Suspend at 40. Next, as shown in FIG. 1 (C), the reinforcing steel frame 6b is moved horizontally to a predetermined position P1 above the floor surface 11 during use while being suspended from the rail 20, and as shown in FIG. 1 (D), the lifting device The reinforcing steel frame 6b slid to 30 positions Q1 to Q6 can be re-hanged on the lifting device 30, and the lifting device 30 can lift the reinforcing steel frame 6b in the vertical direction to the building level. In the illustrated example, the reinforcing steel frame 6b is lifted to the same height level as the rail 20 by the suspending device 30, but it is also possible to lift the reinforcing steel frame 6b to a level higher than the rail 20 if necessary. The reinforcing steel frame 6b lifted up to the construction level is joined to an existing steel frame such as the column 15 assembled prior to the reinforcing steel frame 6b by bolting, welding, or the like. The existing steel frame can be preliminarily constructed with a joint 15a for joining as required.

  In the illustrated example, six slide moving devices 40 are locked to the rail 20, and six lifting devices 30 are installed in parallel rows separated from the rail 20 by a predetermined interval S in the horizontal direction. While the reinforcing steel frame 6 is suspended by the moving device 40 and moved in the horizontal direction, it is lifted by the six lifting devices 30 in the vertical direction. By installing the rail 20 and the lifting device 30 apart in the horizontal direction, the space between the existing roof 3 and the reinforcing steel frame 6b is narrow as shown in FIGS. 1 (C) and 1 (D). However, both the rail 20 and the lifting device 30 can be disposed in the narrow space, and the slide moving device 40 can be easily switched to the lifting device 30. The predetermined interval S can be arbitrarily set within a range in which the slide moving device 40 can be switched to the lifting device 30.

  Further, according to the construction method in which the reinforcing steel frame 6b is constructed by the rail 20 installed on the existing roof 3 and the lifting device 30 as shown in the drawing, it is not necessary to construct a strong temporary floor on the ceiling as in the conventional construction method. If the empty floor 12 can be secured in a part of the building 1, the roof can be reinforced without stopping the production line by the rail 20 and the lifting device 30 that are relatively easy to construct. Therefore, the construction period of the reinforcement work can be shortened as compared with the conventional construction method, and the construction cost can be kept low, and the seismic reinforcement of the existing building can be economically executed while using the floor surface. In addition, the construction method shown in the figure makes it possible to economically reinforce the roof of an existing building for the purpose of snow damage countermeasures.

  In a preferred embodiment, the reinforcing steel frame 6b is divided into a plurality of blocks 50a to 50f as shown in FIG. 1 (E), and then the reinforcing steel frame 6b is blocked by the rail 20 and the lifting device 30 installed on the existing roof 3. Build in units. By constructing the reinforcing steel frame 6b using the rail 20 and the lifting device 30 as described above, it is not necessary to construct a strong temporary floor which is a large scale, but the reinforcing beam 6b for one span is supported on the rail 20. Therefore, the rail 20 and the lifting device 30 that are strong enough to withstand the load of the reinforcing steel frame 6 for one span are required. By carrying the reinforcing steel frame 6b divided into a plurality of blocks 50a to 50f, the load applied to the rail 20 and the lifting device 30 can be kept small.

  2 and 3 show a construction method in which the reinforcing steel frame 6b is divided into six blocks 50a to 50f and is built above the production line 10. FIG. In this illustrated example, after the four slide moving devices 40 are locked on the rail 20, first, as shown in FIG. 2A, the block 50a is moved from the empty floor 12 to the two slide moving devices 40. While being suspended, it is slid to the installation position Q1 of the lifting device 30 above the floor surface 11 in use. Next, as shown in FIG. 2 (B), the block 50b is suspended by the two slide moving devices 40 and slid to the installation position Q2 of the lifting device 30, and as shown in FIG. 2 (C), the installation position Q1. , Q2 are joined to each other on the rail 20 by sliding the blocks 50a and 50b. Thereafter, the block (50a + 50b) joined as shown in FIG. 2 (D) is re-hanged on the lifting device 30, and the block (50a + 50b) is lifted to the building position as shown in FIG. 2 (E) and joined to the existing steel frame 15. To do.

  In FIG. 2D, after the block (50a + 50b) is re-hanged on the lifting device 30, the slide moving device 40 on the rail 20 is released, so that it is returned to the empty floor surface 12 to slide the other block 50c. Available. In FIG. 2E, the block (50a + 50b) is suspended with the lifting device 30 remaining after joining the existing steel frame 15. However, after the block (50a + 50b) is joined to the existing steel frame 15, the lifting device 30 is left. It is also possible to release the lifting device 30 and remove it to another position.

  Next, as shown in FIG. 3A, the block 50c is suspended from the empty floor 12 to the slide moving device 40 and slid to the installation position Q3 of the lifting device 30, and the block 50d is suspended from the slide moving device 40. Then, it is slid to the installation position Q4 of the lifting device 30. As shown in FIG. 3B, the two blocks 50c and 50d slid to the installation positions Q3 and Q4 are joined to each other on the rail 20, and hung on the lifting device 30 as shown in FIG. 3C. Then, it is lifted to the building position and joined to the block (50a + 50b) joined to the existing steel frame 15 in FIG.

  As shown in FIG. 3 (D), the same eternity as in FIGS. 3 (A) to 3 (C) described above is repeated, and the blocks 50e and 50f are suspended from the empty floor 12 by the slide moving device 40, and the lifting device 30 The two blocks 50e and 50f that have been slid are joined to each other on the rail 20, and then reattached to the lifted device 30 (50e + 50f) to the construction position. Lift it up. 3E, one end of the block (50e + 50f) is joined to the block (50a + 50b + 50c + 50d) to join the existing steel frame 15, and the other end of the block (50e + 50f) is joined to the other existing steel frame 15. By doing so, the reinforcing beam 6b for one span can be constructed.

  According to the construction method in which the reinforcing steel frame 6b is divided into a plurality of blocks 50a to 50f as shown in FIGS. 2 and 3, it is sufficient to support the load of two blocks by the rail 20 and the lifting device 30. Thus, the load applied to the rail 20 and the lifting device 30 can be reduced to about 1/3 as compared with the construction method that must support the steel load for one span. For this reason, the rail 20 and the lifting device 30 can be made relatively simple, further shortening the construction period of the seismic reinforcement work and other roof work without stopping the production line, and further reducing the cost. Can be expected.

  2 and 3, the two blocks 50 of the reinforced steel frames 6 b that have been slid are joined together on the rail 20, and the joined blocks (50 + 50) are re-hanged on the lifting device 30 and built. It is possible to omit the joining of the block 50 on the rail 20 although it is lifted in one direction. That is, the broke 50 of the reinforcing steel frame 6b is suspended one by one on the slide moving device 40 and slid to the installation position Q of the lifting device 30, and the slid block 50 is remounted on the lifting device 30 one by one. It is lifted up to this position and joined to the existing steel frame 15. This cycle is sequentially repeated for each block 50, and the blocks 50 are joined to the existing steel frame 15 by being lifted to the building position, and the blocks 50 are connected to each other, thereby reinforcing one span as in FIG. The beam 6b can be erected. By lifting and moving the broke 50 one by one, the load applied to the rail 20 and the lifting device 30 is further reduced, and the earthquake-proof reinforcement work and other roof reinforcement work are further shortened without stopping the production line. Therefore, it can be expected to reduce costs.

Thus, it is possible to achieve the object of the present invention, “the seismic reinforcement method and apparatus capable of economically reinforcing a steel structure building in a short construction period while using the floor surface”.

1 ... Existing steel building (factory) 2 ... Interior space 3 ... Roof 5 ... Existing steel 5a ... Existing steel (beam) 5b ... Existing steel (girder)
5c ... Existing steel frame (brace material) 6 ... Reinforced steel frame 6a ... Reinforced steel frame (beam material) 6b ... Reinforced steel frame (girder material)
6c: Reinforced steel frame (brace material) 7 ... Column material (temporary column)
8 ... Connecting beam (temporary beam) 9 ... Protective gantry (work floor)
DESCRIPTION OF SYMBOLS 10 ... Production area 11 ... Floor surface in use 12 ... Empty floor surface 14 ... Existing pillar 14a ... Joint part 15 ... New pillar 15a ... Joint part 20 ... Rail (trolley beam) 21 ... Hanging plate 22 ... Suspension material 23 ... length adjustment part 24 ... attachment part 30 ... lifting device (hoist)
31 ... Sliding attachment part 32 ... Hanging cable 33 ... Hook-shaped hook 40 ... Slide moving device (hoist)
DESCRIPTION OF SYMBOLS 41 ... Sliding attachment part 42 ... Suspension rope 43 ... Hook-shaped hook 44 ... Clamp for sling 45 ... sling wire 50 ... Steel block 51 ... Joining member

Claims (8)

A rail extending from a position facing the empty floor to a predetermined position facing the floor in use is placed on the roof of the existing steel structure building, and a lifting device is installed in the vicinity of the predetermined position of the roof. The reinforced steel frame is suspended by sliding on the rail, and the reinforced steel frame slid to the position of the lifting device is hung on the lifting device and lifted to the roof. The lifted reinforcing steel frame is joined to the existing steel frame. Seismic reinforcement method for existing buildings. 2. The method of claim 1, wherein the rail is attached to an existing steel frame of a roof via a suspension member as a trolley beam. The method according to claim 1 or 2, wherein a plurality of the lifting devices are installed in parallel rows spaced apart from the rail by a predetermined distance in the horizontal direction, and the reinforcing steel frame is divided into a plurality of blocks. A seismic reinforcement method for existing buildings, which is suspended and slid, and the blocks that have been slid to the position of each lifting device are hung on the lifting device, lifted to the roof, and the raised blocks are connected to each other. . The construction method according to claim 3, wherein a plurality of blocks slid to the position of each lifting device are joined to each other on a rail, and the joined block is hung on the lifting device and lifted to the roof. Seismic reinforcement method. A rail that extends from a position facing a vacant floor to a predetermined position facing a floor in use on a roof of an existing steel structure building, a lifting device installed near a predetermined position of the roof, and the vacant floor A slide moving device is provided for suspending and sliding the reinforcing steel frame to the rail. The reinforcing steel frame slid to the position of the lifting device is hung on the lifting device and lifted to the roof, and the lifted reinforcing steel frame is moved to the existing steel frame. Seismic reinforcement device for existing buildings joined with 6. The apparatus according to claim 5, wherein the rail is a trolley beam attached to an existing steel frame of a roof via a suspension member, and the slide moving device is a hoist suspended so as to be slidable on the trolley beam. apparatus. The apparatus according to claim 5 or 6, wherein a plurality of the lifting devices are installed in parallel rows spaced apart from the rail in a horizontal direction by dividing the reinforcing steel frame into a plurality of blocks, and each block is attached to the rail. A seismic reinforcement device for an existing building, which is suspended and slid, the blocks slid to the position of each lifting device are hung on the lifting device, lifted to the roof, and the raised blocks are connected to each other. . 8. The apparatus according to claim 7, wherein a plurality of slide moving devices are installed on the rail, a plurality of blocks slid by different slide moving devices up to the position of each lifting device are joined to each other on the rail, and the joining is performed. A seismic reinforcement device for an existing building, where the rear block is hung on the lifting device and lifted to the roof.