JP4795838B2 - Variable floor structure and its construction method - Google Patents

Description

  The present invention relates to a variable floor structure capable of freely changing the level of a floor in an arbitrary area after construction, and a construction method for constructing the structure.

  When the floor height in the structure is to be changed freely after the completion of construction (completion), there is a method to suspend the entire floor (slab) from the beam or pillar on the top floor (see Patent Document 1). Since the entire floor of the building is suspended from the beam at the top of the structure, the floor height of any section in one layer cannot be freely changed.

  If the entire structure is divided into a layer that bears seismic force and a layer that does not bear the load, and the floor is supported by the pillars of the non-bearing layer so that it can move up and down, only the floor surrounded by the pillars is free It is thought that it can be moved up and down (see Patent Documents 2 and 3).

JP-A-8-4184 (Claim 1, paragraphs 0009, 0015 to 0022, FIGS. 1 to 3) JP 2004-316254 A (Claim 1, paragraphs 0011 to 0016, FIGS. 1 and 2) JP 2000-248680 A (Claim 1, paragraphs 0006 to 0015, FIGS. 1 to 5)

  In Patent Document 2, the lower floor directly above the foundation is made a seismic isolation layer, the seismic force is borne by this seismic isolation layer, and the seismic force is not borne by the columns and beams on the upper floor from the seismic isolation layer. It is possible to join, and as a result, it is possible to join the beam to the column so as to be movable up and down. Since the beam can be raised and lowered in units between columns, the floor can be raised and lowered in units of areas surrounded by the columns.

  In this case, the upper floor becomes a seismic isolation structure, and the burden of seismic force is reduced. However, in addition to the direct connection of the movable beam to the pillar, which is the main structure of the upper floor, the joint between this pillar and the movable beam is also subject to stresses resulting from horizontal forces (earthquakes and winds) acting on the structure. Since it is necessary to bear, the structure of this junction becomes complicated.

  Although patent document 3 is disclosing the specific method for raising / lowering the floor supported by four pillars, there is no subject which decides arrangement | positioning of a floor freely within a structure.

  In view of the above background, the present invention proposes a structure capable of freely determining the floor section and arrangement in which the floor height can be changed and the construction method thereof.

The variable floor structure according to claim 1 includes a vertical member, a horizontal member laid between adjacent vertical members, and a main structure that bears seismic force and a main structure. A secondary structure that is supported by the main structure in the space and bears its own weight and load, and the secondary structure is erected in the space formed by the main structure, or in and out of the space. It has multiple support pillars and a movable floor that can be moved up and down along the support pillars and can be stopped at any position while being supported by the support pillars, and the movable floor is divided by the multiple support pillars. Divided into parcels ,
The movable floor is supported by a beam material supported by the support column so as to be movable up and down, and the beam material is joined to the support column via a connecting material arranged in parallel in the width direction . The substructure mainly bears its own weight and carrying load, and hardly bears seismic force.

  Since the support column supporting the movable floor does not substantially bear the seismic force, it may be joined to the movable floor to such an extent that it can bear its own weight and load capacity. Although the support pillar bears its own weight and the load capacity of the movable floor, it can be arranged independently from the main structure by standing up in the space that the main structure constitutes or in and out of the space. Therefore, there is no restriction that the arrangement of the support pillars must follow the arrangement of the vertical members of the main structure. As a result, it is possible to freely determine the arrangement of the support pillars without being restricted by the planar shape of the structure, and the planar shape of the movable floor supported by the support pillars is also free within the range that can be supported by the support pillars. Thus, it becomes possible to freely determine the section and arrangement of the floor where the floor height can be changed.

  As long as the support pillar is within the range of the projection plane onto the plane of the main structure or within and near the range, it can be freely arranged except for the vertical member of the main structure. In addition to being arranged along the periphery of the plane, it is also possible to arrange in a plane, or in a grid pattern in the plane and outside the plane, and the partition and arrangement of the movable floor are determined according to the arrangement of the support pillars.

  In order to obtain stability when the movable floor is supported by the support pillars at the four corner positions, the movable floor is supported at the four corner positions and at the middle position in the length direction. The position can be determined freely. For example, the movable floor can be subdivided if support pillars are arranged in a grid in the plane of the space formed by the main structure. The planar shape of the movable floor is not limited to a quadrangle, and may be a circular shape in addition to a polygon such as a triangle or a pentagon. In these cases, the movable floor is appropriately supported by a plurality of support pillars.

Since the movable floor is arranged with the support pillar in the space formed by the main structure, or inside and outside the space, the horizontal member of the main structure is in or near the space surrounded by the main structure. According to the height, it is single or a plurality of stages are arranged in the height direction as described in claim 3 . When a plurality of movable floors are arranged, the number of stages is arbitrarily set depending on the scale of the main structure, but the interval (floor height) between the movable floors is not necessarily constant.

  When the movable floor is arranged in multiple stages, for example, after the movable floor is arranged at equal intervals when the structure is completed, the lower floor or the upper floor movable floor is overlaid on the upper floor or the lower floor movable floor. In addition to storing the movable floor of the lower floor in the ceiling of the upper floor, it is also possible to remove or add the movable floor, and freely change the number of floors in the main structure and the height of the floor Done. The number of floors and the height of the floor are changed in units of individual movable floors divided on the plane.

The movable floor is indirectly supported through a beam member supported by the support column so as to be movable up and down . The beam material may be integrated with the movable floor or separated.

Because the movable floor is supported by the beam material, the structure of the movable floor can be made different from the structure of the beam material, and the movable floor can be made of reinforced concrete, while the beam material can be made of steel. Even when the movable floor is made of reinforced concrete, when the column steel frame is used for the support column, the movable floor is easily supported on the support column.

  In Claims 1 to 3, the movable floor can be moved up and down in the space of the main structure, so that when the structure is constructed, the movable floor is used as a lift for transporting structural members and construction materials and equipment to upper floors. It is possible to use. Since the movable floor can be used as a lift, it is possible to shorten the work period until the structure is completed, compared with the case where only the lifting device other than the movable floor is used.

  Further, in the invention according to any one of claims 1 to 3 as described in claim 4, when the main structure is arranged in a plurality of stages in the height direction, the construction for each main structure is performed in parallel. Therefore, even when the structure is high-rise, the construction period can be greatly shortened.

  The variable floor-height structure according to any one of claims 1 to 4 is a main structure having a vertical member and a horizontal member constructed between adjacent vertical members as described in claim 5. Then, the construction is completed by constructing a substructure comprising a plurality of support columns and a movable floor supported by the support columns in the space formed by the main structure, or in and out of the space.

  6. The method according to claim 5, wherein a jumping gantry is installed outside the space formed by the main structure at the top level of the main structure as described in claim 6, and the jumping gantry is used. When the upper layer of the main structure is constructed, construction can be performed with the space above the main structure completely open. It becomes possible to improve the construction efficiency.

  Support pillars that support the movable floor can be arranged independently of the main structure by being erected in the space formed by the main structure or in and out of the space. The arrangement is not restricted by the arrangement of the vertical members of the main structure, and the arrangement of the support columns can be determined freely. In addition, the planar shape of the movable floor supported by the support pillar can be determined freely, and the floor section and arrangement capable of changing the floor height can be determined freely.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  1-(a), (b) has the vertical member 5, the horizontal member 6 constructed between the adjacent vertical members 5, 5, and the main structure 2 which bears a seismic force, and the main structure 2 The specific example of the variable floor-height structure 1 provided with the substructure 3 supported by the main structure 2 in the space which comprises, and bears own weight and a loading load is shown.

  The substructure 3 moves up and down along the support columns 7 while being supported by the support columns 7 in a space formed by the main structure 2 or in and out of the space. The movable floor 8 has a movable floor 8 that can be stopped at an arbitrary position. The movable floor 8 is divided into division units divided by a plurality of support pillars 7 and can be moved up and down by the division unit. In FIG. 1- (a), a plurality of movable floors 8 are arranged in the height direction in the space formed by the main structure 2, but only one movable floor 8 is arranged in the height direction. There is also.

  Further, in FIG. 1- (a), the main structure 2 constitutes the lower layer portion of the variable floor structure 1, and the upper layer portion 4 composed of a reference floor that does not change the floor height is disposed thereon. However, the variable floor structure 1 may be composed of a single structure or a plurality of main structures 2 as shown in FIG.

  In the case of FIG. 1- (a), the vertical member 5 of the main structure 2 may be extended to the top of the upper layer part 4 or may not be extended. If not extended, a structure having a form different from that of the main structure 2 is constructed on the main structure 2. Main structure 2 is mainly used as a facility for which a change in floor height is expected, so it is used as a tenant, a commercial facility, etc., and the upper layer 4 is used as an office, a house, etc. where there is little need to change the floor height Is done.

  The main structure 2 is, for example, as shown in FIGS. 1B and 5, the vertical members 5 arranged at main positions such as positions on both sides in the long side on the plane of the variable floor structure 1 or four corner positions. And a horizontal member 6 connecting them. In the drawing, the planar shape of the main structure 2 is a rectangle, but the planar shape may not be shaped. The vertical member 5 and the horizontal member 6 of the main structure 2 may be configured by a single member (column and beam) or may be configured by a combination of a plurality of members (assembled column and beam). Since the vertical member 5 of the main structure 2 becomes a core (core column or core wall) that resists the seismic force acting on the variable floor structure 1, it may be a solid section or a hollow section.

  Since the main structure 2 only needs to be able to bear the seismic force by the vertical member 5 and the horizontal member 6, in addition to the form shown in FIG. 1 and the like, a multi-layer seismic element standing up from the foundation as shown in FIGS. A core wall 51 having a wall beam type top girder 61 connected to the top, and an outer peripheral column 52 that is erected around the core wall 51 and coupled to the top girder 61 via a vibration control device 53 or the like. There are also forms. In that case, the core wall 51 and the outer peripheral column 52 become the vertical member 5, and the top girder 61 becomes the horizontal member 6. FIG. 7- (a) shows the plane of the general floor of the frame composed of the core wall 51 and the outer peripheral column 52, and FIG. 7 (b) shows the plane of the top floor. 8- (a) is a longitudinal sectional view of FIG. 7- (a), and FIG. 8- (b) is an orthogonal sectional view of FIG. 8- (a). A portion indicated by a thick line in FIGS. 7A and 7B corresponds to the core wall 51.

  As shown in FIGS. 9A and 9B, the main structure 2 also has a tube structure comprising a large number of outer peripheral columns 52 rising from the foundations at the peripheral positions of the structure, and beams 62 connecting the outer peripheral columns 52. In some cases. In that case, the outer peripheral column 52 is the vertical member 5 and the beam 62 is the horizontal member 6 of the present invention. In the case of FIG. 9, the outer peripheral column 52 also serves as the support column 7. FIG. 9- (a) shows an example of a tube structure having a core (core wall 51) in the center on a plane, and (b) shows a double tube structure having a tube around the core (core wall 51). An example is shown. 9- (a) and (b), the core wall 51 is indicated by a bold line.

  Although FIG. 1 shows the case where the vertical members 5 are arranged at the four corner positions on the plane of the variable floor structure 1, in this case, the horizontal member 6 is formed by the vertical members 5 and 5 adjacent in the long side direction and the short side direction. It is installed between tops or between intermediate parts. As shown in FIG. 1- (b), the support pillar 7 can support at least four movable floors 8 arranged in each section when the plane of the variable floor structure 1 is divided into a plurality of regions. Are arranged as follows.

  In FIG. 1- (b), since one movable floor 8 is arranged between the vertical members 5 and 5 facing in the short side direction on the plane, 3 except for the corners near the outer periphery of the vertical member 5. Support pillars 7 are arranged at the corners of the places. In order to align the dimensions of the movable floor 8 other than both sides in the long side direction, the support columns 7 are arranged at equal intervals between the vertical members 5 and 5 facing in the long side direction, but this is not always necessary.

  The movable floor 8 is detachably joined so as to be supported by at least four support pillars 7 positioned at the corners of the movable floor 8 so as to be movable up and down. The movable floor 8 is joined to the support column 7 directly or indirectly via the beam material 9. 10 to 12 show an example of joining the beam member 9 and the support column 7 which are joined to the movable floor 8 or integrated into the movable floor 8 by being embedded. The support column 7 only needs to bear its own weight and the load of the movable floor 8 and does not bear the seismic force. Therefore, it is sufficient that the support column 7 and the beam material 9 are relatively rotationally deformable pin joints.

  Since the movable floor 8 or the beam member 9 is detachably joined to the support pillar 7 at an arbitrary position in the axial direction of the support pillar 7, a bolt 10 is mainly used for joining. Correspondingly, the support pillar 7 is formed with a through hole 7a through which the bolt 10 penetrates at an interval in the axial direction. The interval between the through holes 7a and 7a is freely set according to the level adjustment level of the movable floor 8, and the level adjustment is performed in fine units, for example, a few tens of mm to a few tens of mm as the interval is reduced.

  FIG. 10 shows a case where H-shaped steel is used for the support column 7 and the beam material 9. In the drawing, one beam is attached to one movable floor 8 and two beam members 9 are used as a set. However, the beam member 9 is attached to one movable floor 8 and may be one, or three or more. is there. The support column 7 is arranged so that its flange is parallel to the axis of the beam member 9, and the web of the beam member 9 is joined directly to the flange of the support column 7 or indirectly via the connecting member 11 as shown in the figure. Is done. When the H-shaped steel used for the beam 9 is molded in such a manner that the web protrudes from the end face of the flange, the web of the beam 9 may be directly joined to the flange of the support column 7.

  In the case of FIG. 10, through holes 7 a and 11 a through which a plurality of bolts 10 necessary to support the movable floor 8 on the support column 7 are formed in the flange of the support column 7 and the connecting member 11. The connecting member 11 may be welded to the web of the beam member 9, but when bolted, a through hole 11a is also formed in a portion of the connecting member 11 overlapping the beam member 9 as shown in the figure. The connecting member 11 is attached to one beam member 9 to avoid eccentricity when the beam member 9 is joined to the support column 7 and secures stability, and is used in parallel with a web interposed therebetween. The support pillar 7 and the through holes 7a and 11a of the connecting material 11 are formed before the construction of the variable floor structure 1, and are formed when the floor height is changed.

  FIG. 11 shows a case where a square steel pipe is used for the support column 7. In this case, since there is no portion in the main body of the support column 7 that engages with the coupling material 11, the coupling material is located at positions corresponding to the web of the beam material 9 on both sides in the width direction of the support column 7 (width direction of the beam material 9). The flange plate 71 for joining 11 is joined by welding or the like. The procedure for joining the connecting member 12 to the flange plate 71 is the same as in FIG.

  In addition to supporting the movable floor 8 by connecting the beam member 9 or the connecting member 11, the support column 7 also functions as a rail for raising and lowering the beam member 9 (movable floor 8) when the floor height is changed. Therefore, in FIG. 10 and FIG. 11, a steel member is used for the support column 7, but if the bracket for joining the beam member 9 and the connecting member 11 can be projected, the support column 7 is reinforced concrete. Sometimes built (including precast) or manufactured.

  When the movable floor 8 (beam material 9) is moved up and down, the movable floor 8 is suspended and supported by a horizontal member 6 or a wire or a steel material suspended from the top of the support column 7, or supported by a jack or a lift below. In this state, the movable floor 8 is raised and lowered. When the movable floor 8 is raised and lowered, the bolt 10 penetrating the support column 7 is removed, and the beam member 9 or the connecting member 11 is separated from the support column 7. When the bolt 10 penetrating the support column 7 is removed, the beam member 9 can freely move up and down with respect to the support column 7, but the connecting member 11 extends to the support column 7 in the width direction (beam member). Therefore, the beam member 9 can be moved up and down using the connecting member 11 as a guide.

  In the case of FIGS. 10 and 11, when the bolt 10 joins the connecting member 11 to the support column 7, a clearance is secured between the flange of the support column 7 and the flange end surface of the beam member 9. When the bolt 10 is removed and the movable floor 8 is moved up and down, there is a possibility that the movable floor 8 (beam material 9) or the connecting material 11 collides with the support column 7. By reducing the clearance, the flange of the beam member 9 can be slid along the flange of the support column 7 when the movable floor 8 is raised or lowered. However, if there is a possibility of collision, the movable floor 8 is raised or lowered. In order to perform smoothing, a roller 12 that can come into contact with the flange of the support column 7 is pivotally supported by the connecting member 11 as shown in FIG. A plurality of rollers 12 are arranged in one place on the connecting member 11 or in the vertical direction as shown.

  The roller 12 is pivotally supported at a position close to the flange of the support column 7, for example, at a position between the two connecting members 11, 11 as shown in FIG. When there is only one connecting material 11, it is pivotally supported on one side. The rollers 12 are arranged on both sides in the axial direction of the beam member 9, and the shaft support positions are adjusted so that at least one of the rollers 12 contacts the support column 7.

  FIG. 2 shows the level of a plurality of movable floors 8 arranged at regular intervals in the height direction in the variable floor structure 1 shown in FIG. The state when it is changed in the unit of the designated partition is shown.

  A) shows a state in which the movable floors 8 on the second floor and the third floor in FIG. (A) shows a state in which the movable floor 8 on the sixth floor in FIG. 1- (a) is overlapped with the movable floor 8 on the lower floor (fifth floor) and the floor height of the fifth floor is increased by about two layers. It is also possible to increase the floor height by placing the movable floor 8 of the lower floor (fifth floor) on the movable floor 8 of the upper floor (sixth floor) or storing it in the ceiling of the upper floor as in c). Become.

  D) Ascending both movable floors 8 and 8 with the movable floors 8 and 8 on the seventh and eighth floors in FIG. 1- (a) being parallel (while maintaining the height of the movable floor 8 on the eighth floor). (The height of the movable floor 8 on the seventh floor is increased). In this case, the work for changing the floor height can be performed while continuing the life and business activities on the movable floor 8 on the upper floor (eighth floor).

  If the decrease in the ceiling height of the upper floor (8th floor) due to the rise of the movable floors 8 and 8 affects the life on the upper floor, etc., the movable floor 8 on the upper floor (9th floor) as in (e). Is also raised and stacked on the movable floor 8 on the upper floor (10th floor), stored in the ceiling, or stacked on the horizontal member 6 of the main structure 2.

  F) Remove the movable floor 8 on either the second or third floor while maintaining the level of the movable floor 8 on the fourth floor, and change the level of the remaining movable floor 8 to A state in which the heights of the second and third floors are increased is shown. Also in this case, when the life on the movable floor 8 on the upper floor (the third floor after the change) is affected, the movable floor 8 on the upper floor (the fifth floor) can be raised as in (c). Done.

  Since the service life of the main structure 2 is considered to be longer than the service life of the substructure 3, the main structure 2 is continuously used in the construction state in any of cases a) to f). The At that time, the exterior is cleaned and repainted as necessary. The interior of the substructure 3, that is, the interior, is prepared as the level of the movable floor 8 changes.

  FIG. 3 shows a procedure for constructing the variable floor structure 1 shown in FIG. 1 in which the upper layer 4 having the reference floor is arranged on the main structure 2 constituting the lower layer. Here, a case is shown in which, after the main structure 2 is constructed in advance, the upper layer portion 4 is constructed in parallel with the construction of the substructure 3 located in the space surrounded by the main structure 2.

  When the upper layer part 4 is constructed in parallel with the construction of the substructure 3, the support pillar 7 constituting the substructure 3 is erected after the construction of the main structure 2, and is supported by the support pillar 7 on the ground. When the movable floor 8 is raised, the movable floor 8 is used as a lift, and the construction materials, temporary members, and the like of the upper layer part 4 are placed on the movable floor 8 and conveyed to the upper layer part 4. If the entire movable floor 8 is used as a lift, every time the equipment on the movable floor 8 on the uppermost floor is replaced with the upper layer part 4, it is carried from the movable floor 8 on the lower floor side to the movable floor 8 on the upper floor side. By doing so, it becomes possible to carry out the transfer work more efficiently. The movable floor 8 raised to the original floor to be fixed is joined to the support pillar 7.

  In the case of FIG. 3A in which the upper layer portion 4 is positioned on the main structure 2 which is the lower layer portion, as shown in FIG. 3B, the top level of the main structure 2 (the floor level on the 11th floor) is shown. For example, if the jumping gantry 13 straddling between the vertical members 5 and 5 facing in the long side direction is installed, the space other than the position of the vertical member 5 of the main structure 2 is open on the plane, and the upper layer 4 Construction can be carried out.

  In FIG. 3, the upper layer part 4 can be constructed in parallel with the construction of the subordinate substructure 3 in the lower layer part, and the upper layer part 4 is constructed following the main structure 2 in the lower part part. Since the upper layer part 4 can be constructed as the main structure 2, as shown in FIG. 4, it is possible to construct the variable floor high structure 1 in which the main structures 2 and 2 are in a layered structure in a short time. is there. In the case of FIG. 4, the plane in each main structure 2 is the same as FIG. 1- (b).

  5A to 5D show examples of combinations of the vertical member 5 of the main structure 2 and the movable floor 8 of the substructure 3. (A), (b) is a case where one vertical member 5 is arranged on each side of the long side direction on the plane of the main structure 2, and a plurality of movable floors 8 are arranged between the vertical members 5, 5. 1, (c) and (d), as shown in FIG. 1, the vertical members 5 are arranged at the four corner positions on the plane, and a plurality of movable floors 8 are arranged in the long side direction of the region surrounded by the four vertical members 5. This is the case when they are arranged. (B), (d) shows the case where the movable floor 8 in (a), (c) is divided into two in the short side direction, respectively. In (d), one movable floor 8 is arranged between the vertical members 5 and 5 facing in the short side direction, but the movable floor 8 may be divided into two.

  FIG. 6- (a) shows a construction example of the variable floor structure 1 in which five layers of the main structure 2 are stacked. Also in this case, following the construction of the main structure 2 from the lower layer side to the upper layer side, the construction of the substructure 3 in the space surrounded by the main structure 2 is repeated. After the construction of the main structure 2 is preceded, the construction of the substructure 3 in each main structure 2 can be performed toward the upper layer side.

When the construction of the main structure 2 for all the layers is preceded, as shown in FIGS. 6 (a) and 6 (b), the pop-up gantry 13 is installed at a position that does not intersect on the plane of each main structure 2. By doing so, it is possible to proceed with the work in each main structure 2 simultaneously.

  In FIG. 6A, the broken line at the top of the third-layer main structure 2 indicates that it is on the opposite side of the jumping gantry 13 at the top of the first-layer main structure 2. . For example, the jumping gantry 13 on the third layer main structure 2 is used when carrying temporary members or materials directly from the ground up to the fourth layer, and the positions of the jumping gantry 13 are different. Thus, it is possible to use all the spring gantry 13 at the same time.

(A) is the elevation which showed the construction example of the variable floor structure which has a main structure and a substructure in a lower layer part, (b) is a top view in the lower layer part of (a). It is the elevation which showed a mode when the level of the movable floor in Fig.1- (a) was changed. (A) is an elevation view showing a state in which the upper layer part is constructed using the movable floor in FIG. 1- (a) as a lift, and (b) is a state in which a jumping gantry is installed at the top of the main structure. It is the shown top view. It is the elevation which showed the example of construction of the variable floor high structure which connected the main structure two layers. (A)-(d) is the top view which showed the example of a combination of a main structure and a substructure. (A) is an elevational view showing a state in which a five-layer main structure is constructed using a jumping gantry, and (b) is a plan view of (a). (A) is the top view which showed the general floor of the structural example comprised from a core wall, an outer periphery pillar, etc., (b) is the top view which showed the top floor. (A) is a longitudinal cross-sectional view of FIG. 7- (a), (b) is an orthogonal cross-sectional view of (a). (A), (b) is the top view which showed the example of the tube structure. (A) is the top view which showed the joining condition of the support pillar and beam material of H-section steel, (b) is an elevation view of (a). (A) is the top view which showed the joining condition of the support pillar and beam material of a square steel pipe, (b) is an elevation view of (a). (A) is the top view which showed a mode that the roller for raising / lowering was installed between the support pillar and beam material in FIG. 10, (b) is an elevation view of (a).

Explanation of symbols

1 ... Variable height structure 2 ... Main structure 3 ... Substructure 4 ... Upper layer 5 ... Vertical member 51 ... Core wall 52 ... Outer pillar 53 ... Damping Device 6 ......... Horizontal member 61 ... Top girder 62 ... Beam 7 ... Support pillar 7a ... Through hole 71 ... Flange plate 8 ... Movable floor 9 ... Beam member 10 ... Bolt 11 ... ... Connecting material 11a ... Through hole 12 ... Roller 13 ... Bounce gantry

Claims (6)

A main member having a vertical member and a horizontal member laid between adjacent vertical members, and bearing a seismic force; and supported by the main structure in a space formed by the main structure; A substructure that bears a load, and the substructure is supported by the support columns and a plurality of support columns that are erected in the space formed by the main structure, or in and out of the space. The movable floor can be moved up and down along the support pillar and can be stopped at an arbitrary position, and the movable floor is divided into a plurality of partition units divided by the support pillars .
The movable floor is supported by a beam member supported by the support column so as to be movable up and down, and the beam member is joined to the support column via a connecting member arranged in parallel in the width direction. High structure. 2. The variable floor structure according to claim 1 , wherein two of the beam members are attached to one of the support pillars and support the movable floor in a state of being arranged in parallel . The variable floor-height structure according to claim 1 , wherein the movable floor is arranged in a plurality of stages in a height direction in a space formed by the main structure.   The variable-floor structure according to any one of claims 1 to 3, wherein the main structure is arranged in a plurality of stages in the height direction.   After constructing a main structure having a vertical member and a horizontal member laid between adjacent vertical members, a plurality of support pillars in the space formed by the main structure, or in and out of the space, A variable floor structure having a movable floor supported by the support pillar is constructed to complete the variable floor structure according to any one of claims 1 to 4. Construction method. A jumping gantry is installed outside the space formed by the main structure at the top level of the main structure, and the upper layer of the main structure is constructed using the jumping gantry. The method for constructing a variable floor structure according to claim 5.

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