JP2016056516A - Timbering structure and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economically efficient timbering structure, at the same time mitigating labor when installing the timbering.SOLUTION: A timbering structure 10 is constructed between floor slabs Fand Fthat face each other in a vertical direction Z of a building 1. The timbering structure 10 includes: a plurality of synthetic resin basic blocks 11 piled between the floor slabs Fand F, such that a dimension of the piled blocks is shorter by a predetermined dimension d than a distance L in the vertical direction Z between the floor slabs Fand F; and adjustment means 12 inserted from an outer side between a pair of basic blocks 11 that are adjacent in the vertical direction Z, for increasing the distance between the pair of basic blocks 11 up to the predetermined dimension d as an inserted amount of the adjustment means increases.SELECTED DRAWING: Figure 2

Description

  The present invention is a heavy machine for dismantling where an existing building having a multi-layered structure such as a large store building such as an apartment house, an office building, or a department store is lifted to the top floor (the roof slab or the floor slab below it). The present invention relates to a supporting structure used to reinforce a floor slab, a method for constructing the same, and a method for demolishing a building when the materials are sequentially demolished from the upper floor to the lower floor.

  Conventionally, as a method of dismantling an existing building, a method of lifting a heavy machine for dismantling to the top floor and sequentially dismantling from the upper floor to the lower floor has been adopted. In this dismantling method, loads such as heavy machinery for dismantling and dismantling materials generated by dismantling work are applied to the existing floor slab, so the loads of heavy machinery and dismantling materials are supported only by the existing floor slab. If this is not possible, a temporary support must be installed to reinforce the floor slab.

  In a conventional method of installing support works, a matrix of strong supports having a weight of 50 to 70 kg per one is provided at intervals of about 1 m on a plurality of floors below a floor where heavy equipment for dismantling works. Each strong support is stretched until there is no gap with the floor slab, and finally, the strong supports are fixed with a horizontal connecting material. As the dismantling work progressed, the support work installed on the upper floor was removed, and the removed strong support was replaced with the lower floor.

  However, this conventional support installation method has the following problems. First, in the demolition work of existing buildings that are carried out in the city, it is often impossible to use a lifting machine for lifting a strong support, and it is necessary to carry a strong support that is a heavy load manually. It requires a lot of labor and is very dangerous work.

  Secondly, the strong support installed by stretching between the floor slabs makes it difficult to loosen the jack part due to the residual load caused by the floor slabs bending due to the load of heavy machinery and dismantled materials. A great deal of labor is required at the time of removal.

  Thirdly, since the receiving plate of the strong support has a small area in contact with the floor slab, there is a concern that the floor slab may be punched and sheared by a heavy machine load.

  In contrast to such a conventional support installation method, for example, Patent Literature 1 discloses a support installation method that does not use a strong support.

Japanese Patent No. 4340243

  According to the support installation method disclosed in Patent Document 1, building a bundling column by in-situ casting of cement-based caking fluid on each existing floor slab below the floor where heavy machinery for dismantling works Thus, the vertical reinforcement of each floor slab is performed.

  However, there is a problem that the work of building the bundle pillar requires a lot of labor and time and is inefficient. Moreover, in order to build a bundle pillar, a large amount of cement-based caking fluid is required, and the built bundle pillar is eventually dismantled to become dismantled, which is very uneconomical. There is a problem that there is.

  An object of the present invention is to provide a support structure and a construction method thereof that reduce the labor required for the installation work of the support work and are economical.

The present invention is a support structure constructed between floor slabs facing each other in the vertical direction of a building,
A plurality of basic blocks made of synthetic resin, stacked between the floor slabs so as to be shorter by a predetermined dimension than the vertical distance between the floor slabs;
And an adjustment means that is inserted from the outside between a pair of basic blocks adjacent in the vertical direction and increases the distance between the pair of basic blocks to the predetermined dimension as the amount of insertion increases. It is a support structure to do.

  Further, the present invention is characterized in that the adjusting means is realized by a pair of height adjusting blocks made of synthetic resin, each formed in a wedge shape.

  In the invention, it is preferable that the basic block and the height adjusting block are made of foamed synthetic resin.

  In the invention, it is preferable that a foaming ratio of the height adjustment block is lower than a foaming ratio of the basic block.

  The present invention is also characterized in that the insertion direction of one height adjustment block is opposite to the insertion direction of the other height adjustment block.

Further, according to the present invention, one height adjustment block is inclined with respect to a contact surface in surface contact with a surface facing the other basic block in one basic block of the pair of basic blocks. An inclined surface,
The other height adjustment block is inclined with respect to the contact surface in surface contact with the surface facing the one basic block in the other basic block, and the inclination of the one height adjustment block. An inclined surface in surface contact with the surface,
The inclination angle of the inclined surface with respect to the contact surface in the one height adjustment block is equal to the inclination angle of the inclined surface with respect to the contact surface in the other height adjustment block.

The present invention is also a construction method of a support structure constructed between floor slabs facing each other in the vertical direction of the building,
A step of stacking a plurality of synthetic resin basic blocks between the floor slabs so as to be shorter than a predetermined distance from the vertical distance between the floor slabs;
A pair of height adjustment blocks made of synthetic resin, each formed in a wedge shape, are inserted between a pair of basic blocks adjacent in the vertical direction from opposite directions, and the distance between the pair of basic blocks is the predetermined dimension. And a step of increasing the size of the support structure.

Further, the present invention is a dismantling method for dismantling an existing building having a multi-layered structure by using a lifted dismantling heavy machine,
A first step of determining the number of layers on which the support structure is to be installed;
A second step of determining the position where the support structure should be installed on each floor;
A third step of installing the support structure in the existing building at each position determined in the second step according to the support structure construction method; is there.

  According to the present invention, since the basic block constituting the support structure is made of synthetic resin and is very light compared to the strong support, it is possible to reduce labor required for manual loading work. In addition, the danger associated with carrying-in work and installation work can be greatly reduced.

  In addition, the basic blocks are stacked between the floor slabs, and the adjusting means is inserted between a pair of basic blocks adjacent in the vertical direction to increase the distance between the pair of basic blocks to a predetermined dimension. Since the support work can be installed by itself, the labor required to install the support work can be significantly reduced compared to the work of installing a strong support, which is heavy, and the work of building a bundle pillar. it can.

  Furthermore, the support structure according to the present invention can be easily removed from between the floor slabs by detaching the adjusting means inserted between the pair of basic blocks from between the pair of basic blocks. It can be used, and support can be installed more economically than when building a pillar.

It is sectional drawing which showed an example of the method of demolishing the existing building 1 using the support structure 10 which concerns on one Embodiment of this invention. It is sectional drawing which shows an example of a structure of the support structure 10 which concerns on one Embodiment of this invention. 2 is a perspective view showing a configuration of a basic block 11. FIG. 3 is a perspective view showing a configuration of a height adjustment block 13. FIG. It is a flowchart which shows the procedure which builds the support structure 10 which concerns on this embodiment. It is a flowchart which shows the process sequence of the demolition method which demolishes the existing building 1 using the support structure 10 which concerns on this embodiment.

FIG. 1 is a cross-sectional view showing an example of a method for dismantling an existing building 1 using a support structure 10 according to an embodiment of the present invention. The building 1 is an existing building having a multi-layered structure such as a large store building such as an apartment house, an office building, or a department store. FIG. 1 shows a 10-story building. In FIG. 1, the floor slabs F _{1 to} F _{10 of the} first floor to the tenth floor, the roof slab R on the roof, the columns 2, and the beams 3 are illustrated as the structural frame of the building 1.

The support structure 10 according to the present embodiment has a vertical direction of the building 1 on the floor below the floor on which the work is performed in order to reinforce the floor slab F of the floor on which the heavy machine 5 for dismantling works in the vertical direction. A plurality of floor slabs F _i and F _{i + 1} opposite to each other are constructed in Z. In the example shown in FIG. 1, the demolition work by heavy equipment 5 is performed on the 10th floor, between the floor slabs F ₉ and F ₁₀ on the 9th floor and the 10th floor, and between the floor slabs F ₈ and F ₉ on the 8th floor and the 9th floor. , and between 7th and 8th floor of the floor slab F _7, F _8, each plurality of支保structure 10 has been constructed.

FIG. 2 is a cross-sectional view showing an example of the configuration of the support structure 10 according to an embodiment of the present invention. The support structure 10 is made of synthetic resin, which is stacked between the floor slabs F _i and F _{i + 1} so as to be shorter than the distance L in the vertical direction Z between the floor slabs F _i and F _{i + 1 by a} predetermined dimension D. Among the plurality of basic blocks 11 and the plurality of basic blocks 11 stacked in the vertical direction Z, between the pair of basic blocks 11 adjacent in the vertical direction Z, from the outer side of the stacked body of the basic blocks 11 The adjusting means 12 is configured to function so as to increase the distance between the pair of basic blocks 11 to a predetermined dimension D as the amount of insertion from the outside increases.

  FIG. 3 is a perspective view showing the configuration of the basic block 11. The basic block 11 is formed in a columnar shape, and has a flat upper surface 11a and a flat lower surface 11b which are parallel to each other and have the same shape and size. In the present embodiment, as shown in FIG. 3, in the basic block 11, the shapes of the upper surface 11a and the lower surface 11b are rectangular, and more specifically, a square. Each side surface 11c connected to the upper surface 11a and the lower surface 11b is formed flat, and thus the basic block 11 is formed in a rectangular parallelepiped shape.

  The plurality of basic blocks 11 constituting the support structure 10 are stacked in the vertical direction Z such that the central axes are arranged coaxially with the upper surface 11a facing upward and the lower surface 11b facing downward. Is done. In the present embodiment, as the plurality of basic blocks 11 constituting the support structure 10, those having the same shape and size of the upper and lower surfaces 11 a and 11 b are used. When viewed in the direction Z, they are stacked in the vertical direction Z so that the upper surface 11a and the lower surface 11b substantially coincide with each other. In addition, about the several basic block 11 which comprises the support structure 10, the same thing may mutually be used about the height dimension which is the distance between the upper surface 11a and the lower surface 11b, and mutually different things are used. May be.

  On the other hand, as shown in FIG. 2, the adjusting means 12 includes a pair of height adjusting blocks 13 made of synthetic resin, each formed in a wedge shape. FIG. 4 is a perspective view showing the configuration of the height adjustment block 13. As shown in FIG. 4, the height adjustment block 13 is formed in a triangular prism shape in which the shape of the top surface 13a and the bottom surface 13b forms a right triangle. In the present embodiment, as the pair of height adjustment blocks 13 constituting the support structure 10, those formed in exactly the same shape and size are used.

  Here, in the height adjustment block 13, a surface including each oblique side on the top surface 13a and the bottom surface 13b is referred to as an inclined surface 13c, and a surface including each bottom side on the top surface 13a and the bottom surface 13b is referred to as a contact surface 13d. A portion where 13c and the contact surface 13d are connected is referred to as a front end portion 13f, and a surface connected to the top surface 13a, the bottom surface 13b, the inclined surface 13c, and the contact surface 13d is referred to as a rear end surface 13e. In addition, in the height adjustment block 13, each surface 13a-13e is each formed flat.

  As shown in FIG. 2, the pair of height adjustment blocks 13 are arranged such that one height adjustment block 13 has its contact surface 13 d facing downward and perpendicular to the vertical direction Z. Inserted in the insertion direction A1 between the pair of basic blocks 11 from the side, the other height adjustment block 13 has its tip 13f in a posture such that its contact surface 13d faces upward and is perpendicular to the vertical direction Z. It functions as the adjusting means 12 by being inserted between the pair of basic blocks 11 from the side in the insertion direction A2 which is the direction opposite to the insertion direction A1.

  Here, the insertion directions A1, A2 are directions perpendicular to the up-down direction Z. The insertion direction A1 is a direction that coincides with the direction from the rear end surface 13e toward the front end portion 13f in the direction along the normal line of the rear end surface 13e in the one height adjustment block 13, and the insertion direction A2 is In the other height adjustment block 13, of the directions along the normal line of the rear end surface 13e, the direction is the same as the direction from the rear end surface 13e toward the front end portion 13f.

  At the time of insertion, one height adjustment block 13 has its contact surface 13d in surface contact with the upper surface 11a of the basic block 11 disposed below the pair of basic blocks 11, and its inclined surface 13c. Is inserted while being in surface contact with the inclined surface 13c in the other height adjustment block 13, and at this time, the tip portion 13f slides on the inclined surface 13c in the other height adjustment block 13.

  On the other hand, the other height adjustment block 13 has its contact surface 13d in surface contact with the lower surface 11b of the basic block 11 disposed on the upper side of the pair of basic blocks 11, and its inclined surface 13c has one side. The height adjustment block 13 is inserted while being in surface contact with the inclined surface 13c. At this time, the tip end portion 13f slides on the inclined surface 13c of the one height adjustment block 13.

  As described above, since one height adjustment block 13 and the other height adjustment block 13 are configured identically, the contact surface 13d of the inclined surface 13c in the one height adjustment block 13 is the same. Is equal to the inclination angle α of the other height adjustment block 13 with respect to the contact surface 13d of the inclined surface 13c.

  Therefore, by inserting the one and the other height adjustment blocks 13 as described above, the respective contact surfaces 13d are maintained in parallel with each other, and the contact surfaces 13d are increased as the insertion amount increases. The distance also increases, and accordingly, the upper surface 11a and the upper surface of the basic block 11 disposed below the pair of basic blocks 11 that are in surface contact with each contact surface 13d are disposed. The lower surface 11b of the basic block 11 is spaced apart in the vertical direction Z while maintaining a state parallel to each other.

In this manner, the distance d between the upper surface 11a of the basic block 11 arranged on the lower side and the lower surface 11b of the basic block 11 arranged on the upper side is the distance L in the vertical direction Z between the floor slabs F _i and F _{i + 1.} And the one and the other height adjustment block 13 are inserted until they coincide with the predetermined dimension D corresponding to the difference between the height dimensions of the plurality of basic blocks 11 and the support structure 10. Built.

At this time, the one and the other height adjustment blocks 13 are inserted until the support structure 10 is stretched between the floor slabs F _i and F _{i + 1} . In addition, by inserting until it will be in this stretched state, one and the other height adjustment block 13 are the contact of the upper surface 11a of the basic block 11 arrange | positioned below, and the one height adjustment block 13 Friction force acting between the surface 13 d, friction force acting between the lower surface 11 b of the basic block 11 disposed on the upper side and the contact surface 13 d of the other height adjustment block 13, and the pair of basic blocks 11 The frictional force acting between the inclined surfaces 13c is prevented from easily separating.

  When inserting the one and the other height adjustment blocks 13, the insertion directions A1 and A2 are inserted so as to coincide with the extending directions of a pair of opposite sides defining the upper surface 11a of the basic block 11. The

  Here, among the four sides defining the upper surface 11a of the basic block 11, a pair of opposite sides extending in parallel to the insertion directions A1 and A2 is referred to as a side 11d, and the other pair of opposite sides is referred to as a side 11e. Of the four sides defining the contact surface 13d of the height adjustment block 13, a pair of opposite sides extending in parallel with the insertion direction A1 or A2 is referred to as a side 13g, and the other pair of opposite sides is referred to as a side 13h. To do. Further, among the four sides defining the rear end surface 13e of the height adjustment block 13, a pair of opposite sides that are continuous with the side 13h are referred to as a side 13i.

  In the present embodiment, the height adjustment block 13 is designed such that the length m2 of the side 13g is longer than the length m1 of the side 11d in the basic block 11, as shown in FIG. On the other hand, the length of the side 13h in the height adjustment block 13 is selected to be greater than or equal to the length of the side 11e in the basic block 11, and in this embodiment, the length is selected to be the same as the length of the side 11e.

  The predetermined dimension D is a height dimension (that is, the length of the side 13i) h1 in the height adjustment block 13 and a distance m1 along the side 13g from the distal end portion 13f in the height adjustment block 13. It is selected as a value between the height dimension at the vertical position (that is, the distance between the contact surface 13d and the inclined surface 13c at that position) h2. That is, the predetermined dimension D is determined based on the shape of the height adjustment block 13.

  By selecting the predetermined dimension D as a value between the height dimension h <b> 1 and the height dimension h <b> 2 in the height adjustment block 13, in a state where the support structure 10 is constructed, The entire upper surface 11a of the basic block 11 disposed on the lower side is brought into surface contact with the contact surface 13d of the one height adjustment block 13, and the entire lower surface 11b of the basic block 11 disposed on the upper side is disposed on the other height. Surface contact can be made with the contact surface 13 d of the height adjustment block 13.

  Here, as an example of dimensions, in the present embodiment, as the basic block 11, the upper and lower surfaces 11 a and 11 b having a size of 1000 mm × 1000 mm and a height dimension of 500 mm are used. On the other hand, as the height adjustment block 13, the length m2 of the side 13g is 1300 mm, the length of the side 13h is 1000 mm, and the height dimension h1 is 300 mm.

In this case, the predetermined dimension D is preferably selected as a value between 240 mm and 290 mm. In addition, when the basic blocks 11 having the above dimensions are stacked in the vertical direction Z, the sum of the distance L in the vertical direction Z between the floor slabs F _i and F _{i + 1} and the height dimension of the stacked basic blocks 11. If the difference between the basic block 11 and the basic block 11 having a height dimension of 400 mm is combined with the basic block 11 having a height dimension of 400 mm, for example, the basic block 11 having a height dimension of 400 mm is combined. May be used.

  In addition, as the height adjustment block 13, those having an inclination angle α of 30 ° or less are preferably used, and those having 10 ° or more and 20 ° or less are more preferably used.

  As the synthetic resin that is a material of the basic block 11 and the height adjustment block 13, a foamed synthetic resin is preferably used. In this embodiment, both the basic block 11 and the height adjusting block 13 are formed by cutting an EPS (Expanded Poly-Styrol) block made of a foamed synthetic resin using polystyrene as a raw material synthetic resin into a desired size. Yes.

More specifically, the EPS block constituting the basic block 11 has a unit volume weight of 0.35 kN / m ³ and a foaming ratio (unit: liter / kg, where gravitational acceleration = 10 m / s ² , EPS block (model number DX-29D) manufactured by Hamashima Kasei Co., Ltd., which is 1000 / 35≈28.6 times and allowable compressive stress is 140 kN / m ² , is used. Hamashima Kasei Co., Ltd. has an EPS block comprising a unit volume weight of 0.70 kN / m ³ , an expansion ratio of 1000 / 70≈14.3 times, and an allowable compressive stress of 350 kN / m ^2. A manufactured EPS block (model number DX-45D) is used. In addition, the basic block 11 having the above-mentioned size including such an EPS block is approximately 17.5 kg (≈0.35 kN / m ³ × 0.5 m ³ ), and the height adjustment block 13 is approximately 13.65 kg. (≈0.70 kN / m ³ × 0.195 m ³ ).

As the basic block 11 and the height adjustment block 13 used for the support structure 10, the load of the heavy machine 5 for disassembly (assuming a 0.45 m class ³ backhoe having a weight of 14 t) is concentrated for safety. In view of the above, it is preferable to use one having an allowable compressive stress of 100 kN / m ² or more.

  FIG. 5 is a flowchart showing a procedure for constructing the support structure 10 according to the present embodiment. In step s1, marking is given to a place where the support structure 10 is to be installed, and the process proceeds to step s2. In step s2, it is confirmed whether or not conspicuous unevenness or protrusions are present in the marked part, and if they are present, they are removed to flatten the installation part. Proceed to s3.

In step s3, the basic blocks 11 are stacked between the floor slabs F _i and F _{i + 1} so as to be shorter than the distance L in the vertical direction Z between the floor slabs F _i and F _{i + 1 by a} predetermined dimension D. Proceed to s4. At this time, as described above, the plurality of basic blocks 11 are arranged so that the central axes thereof are coaxially arranged, and the upper surface 11a and the lower surface 11b are substantially aligned with each other when viewed in the vertical direction Z. Stacked in direction Z. In the example shown in FIG. 2, in this step s3, five basic blocks 11 are stacked.

  In step s4, between the pair of basic blocks 11 adjacent to each other in the vertical direction Z, the upper surface 11a of the basic block 11 disposed on the lower side of the pair of basic blocks 11 and the lower surface of the basic block 11 disposed on the upper side. The pair of height adjustment blocks 13 are inserted from opposite directions until the distance from 11b reaches a predetermined dimension D, and the process proceeds to step s5. FIG. 2 shows an example in which a pair of height adjustment blocks 13 are inserted between the uppermost basic block 11 and the lower basic block 11.

At this time, the pair of height adjustment blocks 13 are inserted so as to be symmetric with respect to a virtual plane including the central axis of each basic block 11 and perpendicular to the insertion directions A1 and A2. Moreover, when inserting the height adjustment block 13, it can insert easily by hitting the rear end surface 13e, for example with a mallet. When the lower surface of the floor slab F _{i + 1} and the upper surface 11a of the uppermost basic block 11 are not in firm surface contact, a thin plate may be inserted between them.

  In step s5, it is visually confirmed whether or not the blocks 11 and 13 are displaced beyond the allowable range, and the construction work of the support structure 10 is completed.

On the other hand, when the constructed support structure 10 is removed from between the floor slabs F _i and F _{i + 1} , the pair of height adjustment blocks 13 can be easily removed simply by removing them from between the pair of basic blocks 11. Can do.

  Hereinafter, a method of dismantling the existing building 1 using the support structure 10 according to the present embodiment will be described. FIG. 6 is a flowchart showing a processing procedure of the dismantling method for the existing building 1 according to the present embodiment.

  In step a1, design conditions are determined. Specifically, the specifications (weight and dimensions of each part) of the heavy machine 5 for dismantling are determined, and the allowable stress level of the concrete is determined based on the design standard strength of the concrete used for the floor slab F. The allowable stress level of the reinforcing bar is determined based on the type of reinforcing bar that is determined and used for the floor slab F. Furthermore, the allowable compressive stress level of the support structure 10 is determined based on the material of the basic block 11 and the height adjustment block 13 constituting the support structure 10.

  In step a2, a load condition is determined. Specifically, a heavy machine load, an existing structure load, a support load, a dismantling glass load, an impact load, and the like are determined.

  In step a3, the number of support work layers is determined based on the size of the floor slab F and the load condition determined in step a2. The number of support work layers is determined according to how many floor slabs F can handle the reaction force transmitted to the support structure 10. For example, as shown in FIG. 1, when the reaction force transmitted to the support structure 10 is handled by the four-layer floor slab F, the number of support work layers is determined to be three.

In step a4, 2D frame analysis is performed on the floor slabs F _i and F _{i + 1} as a unidirectional beam (short-side direction), and the upper load slab F is checked by checking the effect of spreading the load on the support structure 10. Consider the pitch of the support structure 10 in which the overload on _{i + 1} is distributed almost evenly on the lower floor slab F _i . However, since the floor slab F acts as a flat plate, the pitch of the support structure 10 is 3D modeling of the floor slab F, 3D-FEM analysis is performed, and the effect of dispersing the load on the support structure 10 is checked. Then, the determination result is taken into consideration. Based on the determined pitch of the support structures 10, the arrangement of the support structures 10 on each floor is determined.

  In step a5, a plurality of support structures 10 are installed for the building 1 to be demolished based on the number of support work layers determined in step a3 and the arrangement of the support structures 10 determined in step a4. . The construction procedure of each support structure 10 is as shown in FIG.

  When the support structure 10 is installed at a predetermined location, the heavy machine 5 for dismantling is lifted in step a6, and the dismantling work by the heavy machine 5 for dismantling is performed. Hereinafter, with reference to FIG. 1, in step a6, the heavy machine 5 for dismantling is lifted to the 10th floor, and the roof slab R and the like on the roof are dismantled by the heavy machine 5 for dismantling.

When the dismantling work by the heavy machine 5 for dismantling is completed on the 10th floor, it is determined in step a7 whether or not the support structure 10 needs to be replaced. If necessary, the support structure is determined in step a8. The work of rearranging 10 is performed. For example, as described above, when a demolition work by heavy machinery 5 for dismantling is completed at the 10th floor, the 10th floor支保structures built between the floor slab F ₁₀ and the ninth floor of the floor slab F ₉ body 10 is removed, removal and支保structure 10, in order to reinforce the ninth floor of the floor slab F ₉ in the vertical direction, and is constructed between the 6th and 7th floor slabs F _6, F _7. Then, it progresses to step a6 and a demolition work is performed by the heavy machine 5 for a demolition on the 9th floor. In this way, the building 1 is dismantled by sequentially performing dismantling work from the upper floor.

  As described above, according to the present embodiment, the basic block 11 constituting the support structure 10 is made of a synthetic resin and is extremely light compared to a strong support, so that the manual loading work is performed. Can be reduced, and the danger associated with carrying-in work and installation work can be greatly reduced. In addition, the use of foamed synthetic resin as the synthetic resin further reduces the weight, reduces the labor required for manual loading work, and further reduces the risks associated with loading and installation work. be able to.

Further, the basic blocks 11 are stacked between the floor slabs F _i and F _{i + 1} , and the adjusting means 12 is inserted between a pair of basic blocks 11 adjacent in the vertical direction Z, and a distance L between the pair of basic blocks 11 is obtained. Can be installed simply by performing the work of increasing to a predetermined dimension D, compared to the work of installing a heavy-duty strong support and the work of building a bundle pillar. The labor required for installation work can be greatly reduced.

Furthermore, the supporting structure 10 according to the present invention can be easily removed from between the floor slabs F _i and F _{i + 1} by detaching the adjusting means 12 inserted between the pair of basic blocks 11 from between the pair of basic blocks 11. Can be removed. Moreover, it can be reused, and a support work can be installed economically compared to the case of building a bundle pillar.

  Further, since the support structure 10 according to the present invention has a larger area in contact with the floor slab F, that is, the area of the upper surface 11a of the basic block 11, than the strong support, the punching shear failure of the floor slab due to the load of heavy machinery. Can be reliably prevented.

  Moreover, according to this embodiment, since the height adjustment block 13 which comprises the support structure 10 also consists of a synthetic resin, the labor required for the carrying-in operation | work by human power can be reduced, and carrying-in is carried out. Risks associated with work and installation work can also be greatly reduced. In addition, the use of foamed synthetic resin as the synthetic resin further reduces the weight, reduces the labor required for manual loading work, and further reduces the risks associated with loading and installation work. be able to.

Further, according to this embodiment,支保structure 10, floor slabs F _i, is configured as a columnar body which is installed in a state of taut between F i + _1, floor slabs F _i, of the contact surface between F i + ₁ size Is much larger than the size of the contact surface between the strong support and the floor slab F _i , F _{i + 1} when the strong support is installed. Can be significantly reduced. Therefore, by using the support structure 10 according to the present embodiment as a support work when the building is dismantled, the labor and time required for support work installation per floor can be significantly reduced.

  Further, according to the present embodiment, the foaming magnification of the height adjustment block 13 is selected to be lower than the foaming magnification of the basic block 11. Therefore, as described above, even if the height adjustment block 13 is inserted by hitting with a mallet, the height adjustment block 13 is not easily damaged.

  In the present embodiment, the shape of the basic block 11 is a rectangular parallelepiped shape. However, in other embodiments, the shape may be a cylindrical shape, a triangular prism shape, a rectangular tube shape, or the like.

  Further, in the present embodiment, each height adjustment block 13 is prevented from being displaced only by the frictional force. However, the present invention is not limited to this, and a separate displacement prevention measure may be taken by using a chain block or a wire. .

  Although FIG. 1 shows a method of dismantling the building 1 using only the support structure 10, the present invention is not limited to this, and the support structure 10 and a conventional strong support can be used in combination. Moreover, although the usage example in the case of dismantling the building 1 is shown in FIG. 1, the support structure 10 according to the present invention can also be used when a building is newly established.

DESCRIPTION OF SYMBOLS 10 Support structure 11 Basic block 12 Adjustment means 13 Height adjustment block

Claims (8)

A support structure constructed between floor slabs facing each other in the vertical direction of the building,
A plurality of basic blocks made of synthetic resin, stacked between the floor slabs so as to be shorter by a predetermined dimension than the vertical distance between the floor slabs;
And an adjustment means that is inserted from the outside between a pair of basic blocks adjacent in the vertical direction and increases the distance between the pair of basic blocks to the predetermined dimension as the amount of insertion increases. Support structure to do.   The supporting structure according to claim 1, wherein the adjusting means is realized by a pair of height adjusting blocks made of synthetic resin, each formed in a wedge shape.   The support structure according to claim 2, wherein the basic block and the height adjustment block are made of foamed synthetic resin.   The support structure according to claim 3, wherein a foaming ratio of the height adjustment block is lower than a foaming ratio of the basic block.   The support structure according to any one of claims 2 to 4, wherein the insertion direction of one height adjustment block is opposite to the insertion direction of the other height adjustment block. One height adjustment block has a contact surface in surface contact with the surface facing the other basic block in one of the pair of basic blocks, and an inclined surface inclined with respect to the contact surface. And
The other height adjustment block is inclined with respect to the contact surface in surface contact with the surface facing the one basic block in the other basic block, and the inclination of the one height adjustment block. An inclined surface in surface contact with the surface,
The inclination angle of the inclined surface with respect to the contact surface in the one height adjustment block is equal to the inclination angle of the inclined surface with respect to the contact surface in the other height adjustment block. The support structure as described in any one. A construction method of a support structure constructed between floor slabs facing each other in the vertical direction of a building,
A step of stacking a plurality of synthetic resin basic blocks between the floor slabs so as to be shorter than a predetermined distance from the vertical distance between the floor slabs;
A pair of height adjustment blocks made of synthetic resin, each formed in a wedge shape, are inserted between a pair of basic blocks adjacent in the vertical direction from opposite directions, and the distance between the pair of basic blocks is the predetermined dimension. And a step of increasing the size of the supporting structure. A dismantling method for dismantling an existing building with a multi-layer structure by using a heavy lifting machine.
A first step of determining the number of layers on which the support structure according to any one of claims 1 to 6 is to be installed;
A second step of determining the position where the support structure should be installed on each floor;
A third step of installing the support structure in the existing building at each position determined in the second step according to the support structure construction method according to claim 7. Building demolition method.

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