Lining plate and method for demolishing existing building

Abstract

To provide a lining plate easily movable by a heavy machine for demolition.SOLUTION: A lining plate 1 includes a plurality of H-shaped steels 10 arranged substantially in parallel and joined to each other, and a stiffening plate 20D provided in a reinforcement section R of the H-shaped steels 10. The stiffening plate 20D is joined to a lower flange 12 and an upper flange 13 of the H-shaped steel 10A at both width-directional ends. Since the stiffening plate side 20D is provided on the side face of the reinforcing section R of the lining plate 1, the rigidity and strength of the lining plate 1 can be increased. Thus, the covering plate 1 excellent in bending rigidity can be realized. Thus, when moving the lining plate 1, the reinforcing section R (the stiffening plate 20D part) of the lining plate 1 can be gripped by the crushing machine 31 of the demolishing heavy machine 30. Thus, it is not necessary to lift the lining plate 1 by a wire or the like, and the movement of the lining plate 1 is facilitated.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a lining plate and a method for demolishing an existing building using the lining plate. [Background technology]

[0002] Conventionally, covering plates have sometimes been used in demolition work (see Patent Documents 1 and 2). That is, covering plates are laid on the floor surface of the floor to be demolished, and demolition machinery is run over the covering plates to demolish the existing structure. In this way, by laying covering plates under the demolition machinery, the load of the demolition machinery is dispersed, preventing the existing floor from collapsing due to the weight of the demolition machinery.

[0003] Patent Document 1 shows a girder-type support device that includes a girder frame with one side of the web of an H-shaped steel as a support surface, multiple H-shaped steel auxiliary frames fixed along the longitudinal direction to the underside of the longitudinal center of the girder frame, and tie rods fixed to both longitudinal ends of the auxiliary frame, and that tightens the tie rods to generate tension in the girder frame and the auxiliary frame. Patent Document 2 shows a covering plate comprising a plurality of H-shaped steel beams arranged in parallel, a plurality of connecting bolts that pass through each web of each H-shaped steel beam to connect the plurality of H-shaped steel beams, and a reinforcing pipe body that is cylindrical and through which the connecting bolts pass and that abuts against adjacent webs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-48586 [Patent Document 2] Utility Model Registration No. 3201714 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a covering plate that can be easily moved by demolition heavy machinery, and a method for demolishing an existing building using this covering plate. [Means for solving the problem]

[0006] The covering plate of the first invention (for example, the covering plate 1 described later) comprises a plurality of structural steels (for example, the H-shaped steel 10 described later) arranged approximately parallel and joined to each other, and a stiffening plate (for example, the stiffening plate 20D described later) provided in a predetermined section in the longitudinal direction of the structural steels (for example, the reinforcement section R described later), and is characterized in that the stiffening plate is joined to the lower end (for example, the lower flange 12 described later) and the upper end (for example, the upper flange 13 described later) of the structural steels (for example, the H-shaped steel 10A described later) at both ends in the width direction.

[0007] According to this invention, since stiffening plates are provided on the side surfaces of the lining plate in a predetermined section, the rigidity and strength of the lining plate can be increased, thereby realizing a lining plate with excellent bending rigidity. As a result, when moving the lining plate, the reinforced portion of the lining plate (stiffening plate) can be grasped with the crusher of the demolition heavy equipment. This eliminates the need to lift the lining plate with a wire or the like, making it easy to move. Furthermore, even in this way, the reinforced portion of the lining plate (stiffening plate) has high rigidity and strength, so deformation and damage to the lining plate can be prevented.

[0008] The covering plate of the second invention is characterized in that a reinforcing steel plate or an anti-slip steel material (for example, steel rod 21 described later) is welded and fixed to the upper surface of a predetermined section of the shaped steel.

[0009] According to this invention, since the reinforcing steel plate or the anti-slip steel material is welded to the upper surface of the predetermined section of the shaped steel, the predetermined reinforced section can be easily recognized visually from above the covering plate. Therefore, the predetermined reinforced section of the covering plate can be easily grasped and moved by the crusher of the demolition heavy equipment.

[0010] The covering plate of the third invention is a method for demolishing an existing building using the above-mentioned covering plate, characterized in that it includes a step (for example, step S1 described below) of laying the covering plate between a plurality of beams (for example, beams 4 described below) on the floor surface of the floor to be demolished (for example, floor surface 3 described below), and a step (for example, step S2 described below) of demolishing the existing structure of the floor to be demolished using a crusher (for example, crusher 31 described below) of the demolition heavy equipment (for example, demolition heavy equipment 30 described below) while moving the demolition heavy equipment over the covering plate.

[0011] According to this invention, a covering plate is laid between two beams on the floor to be demolished, and the demolition machinery is moved over the covering plate while the existing framework of the floor to be demolished is demolished with its crusher. Therefore, even if the existing floor slab of the existing building is weak, there is no need to reinforce the existing floor slab from the floor below with supports or the like, and the existing building can be demolished quickly. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a covering plate that can be easily moved by demolition heavy machinery, and a method for demolishing an existing building using this covering plate. [Brief explanation of the drawings]

[0013] [Figure 1] 1A and 1B are a plan view and a side view of a covering plate according to one embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged view of the area surrounded by dashed lines A and B of the covering plate in FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view of the covering plate of FIG. 2 taken along CC line. [Figure 4] FIG. 3 is a view of the covering plate in the direction of arrow DD in FIG. 2. [Figure 5] FIG. 3 is an E-E cross-sectional view of the covering plate of FIG. 2. [Figure 6] 10 is a flowchart of the procedure for demolishing an existing building using a covering plate according to the embodiment. [Figure 7] This is an explanatory diagram of the demolition procedure for the existing building (Part 1, the state in which the covering plate is sandwiched between the crusher of the demolition heavy equipment). [Figure 8]This is an explanatory diagram of the demolition procedure for the existing building (part 2, demolition machinery running on the covering plate). DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention relates to a covering plate for demolition machinery to travel on, and a demolition method for an existing building in which the demolition machinery moves on the covering plate to demolish the existing structure of the demolition floor. The covering plate is made of multiple shaped steel members arranged approximately parallel to each other, with stiffening plates (20D) attached to the sides of the shaped steel members at predetermined intervals. Stiffener plates 20A to 20C are joined to the webs of the H-shaped steel to prevent local buckling of the webs. Stiffener plate 20D covers both side surfaces of the covering plate and is joined to stiffener plates 20B and 20C and the bottom and top flanges of the H-shaped steel. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1(a) is a plan view of a lining plate 1 according to one embodiment of the present invention. Fig. 1(b) is a side view of the lining plate 1. Fig. 2(a) is an enlarged view of a portion of the lining plate 1 in Fig. 1(a) surrounded by dashed line A. Fig. 2(b) is a side view of a portion of the lining plate 1 in Fig. 1(b) surrounded by dashed line B. Fig. 3 is a cross-sectional view taken along CC of the lining plate 1 in Fig. 2(b). Fig. 4 is a view taken along arrow DD of the lining plate 1 in Fig. 2(b). Fig. 5 is a cross-sectional view taken along arrow EE of the lining plate 1 in Fig. 2(b).

[0015] The covering plate 1 is used for demolishing an existing building 2. Specifically, the covering plate 1 is laid between a plurality of beams 4 on a floor surface 3 of a floor to be demolished of the existing building 2. The covering plate 1 comprises four H-shaped steel beams 10 arranged approximately parallel and joined to each other, stiffening plates 20A to 20E attached to these H-shaped steel beams 10, and steel rods 21 welded and fixed to the upper surfaces of the four H-shaped steel beams 10. The H-shaped steel 10 includes a web 11, and a bottom flange 12 and a top flange 13 provided above and below the web 11. The bottom flanges 12 and the top flanges 13 of adjacent H-shaped steels 10 are joined by welding.

[0016] Hereinafter, the three locations in the longitudinal direction of the lining plate 1 will be referred to as reinforcement sections R, which are predetermined sections for reinforcing the lining plate 1. In addition, of the four H-shaped steels 10, those located at both ends of the lining plate 1 in the width direction will be referred to as H-shaped steels 10A. In areas other than the reinforced section R, stiffening plates 20A are provided on the side surfaces of the lining plate 1 at predetermined intervals along the length of the lining plate 1. Specifically, the stiffening plates 20A are plates extending in the vertical direction, and are joined to the bottom flange 12, web 11, and top flange 13 of the H-shaped steel 10A.

[0017] In the reinforced section R, steel bars 21R are added as anti-slip steel materials, and as a result, the pitch of the steel bars 21, 21R in the reinforced section R is finer than the pitch of the steel bars 21 in parts other than the reinforced section R. In the reinforcement section R, stiffening plates 20B are provided across four H-shaped steel beams 10 at three locations in the longitudinal direction of the covering plate 1. Specifically, the stiffening plates 20B are plate materials extending in the vertical direction, and are joined to the bottom flange 12, the web 11, and the top flange 13 of the H-shaped steel beam 10.

[0018] In addition, in the reinforcement section R, stiffening plates 20C are provided between the stiffening plates 20B on the side surfaces of the lining plate 1. Specifically, the stiffening plates 20C are horizontally extending plate materials, and are joined to the stiffening plates 20B provided on the side surfaces of the H-shaped steel 10A and to the web 11 of the H-shaped steel 10A. Additionally, in the reinforcement section R, a stiffening plate 20D is provided to cover the side surface of the covering plate 1. Specifically, the stiffening plate 20D is joined to the stiffening plate 20B and the stiffening plate 20C provided on the side surface of the H-shaped steel 10A, as well as to the bottom flange 12 and the top flange 13 of the H-shaped steel 10A. Furthermore, stiffening plates 20E are provided on both end surfaces of the lining plate 1 to prevent soil and sand from flowing in between the H-shaped steel beams 10A.

[0019] The procedure for demolishing the existing building 2 using the covering plate 1 will be described below with reference to the flowchart of FIG. In step S1, as shown in Fig. 1, a covering plate 1 is erected between a plurality of beams 4 on the floor surface 3 of the floor to be demolished of the existing building 2. At this time, as shown in Fig. 7, the covering plate 1 is handled by clamping the reinforced section R of the covering plate 1 between the crusher 31 of the demolition heavy equipment 30. In step S2, the demolition heavy equipment 30 is run on the lining plate 1 while the crusher 31 of the demolition heavy equipment 30 demolishes the existing structure of the floor to be demolished. At this time, as shown in Figure 8, demolition debris 5 generated by demolishing the existing structure is laid between the lining plates 1 to prevent the lining plates 1 from shifting and to ensure the movement of the crawlers 32 of the demolition heavy equipment 30. In step S3, steps S1 and S2 are repeated to demolish the existing building 2 in order from the upper floors to the lower floors.

[0020] According to this embodiment, the following effects are obtained. (1) The stiffening plates 20D are provided on the side surfaces of the reinforced section R of the lining plate 1, thereby increasing the rigidity and strength of the lining plate 1. Therefore, a lining plate 1 with excellent bending rigidity can be realized. As a result, when moving the lining plate 1, the crusher 31 of the demolition heavy equipment 30 can simply grasp the reinforced section R (stiffening plate 20D) of the lining plate 1. This eliminates the need to lift the lining plate 1 with a wire or the like, making it easy to move the lining plate 1. Even in this way, the reinforced section R (stiffening plate 20D) of the lining plate 1 has high rigidity and strength, so deformation and damage to the lining plate 1 can be prevented.

[0021] (2) Since the steel rods 21R are welded and fixed to the upper surface of the reinforced section R of the H-shaped steel 10, the reinforced reinforced section R can be easily recognized visually from above the lining plate 1. Therefore, the crusher 31 of the demolition heavy equipment 30 can grasp the reinforced section R of the lining plate 1 and easily move it. (3) On the floor to be demolished, a covering plate 1 is laid between two beams 4, and a demolition machine 30 is moved on this covering plate 1 while a crusher 31 of the demolition machine 30 demolishes the existing structure of the floor to be demolished. Therefore, even if the existing floor slab of the existing building 2 is weak, there is no need to reinforce the existing floor slab from the floor below with supports or the like, and the existing building can be demolished quickly.

[0022] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of achieving the object of the present invention are included in the present invention. For example, in the above-described embodiment, steel rods 21 were welded and fixed to the upper surface of the reinforced section R of the H-shaped steel 10 as anti-slip steel material, but this is not limited to this, and a reinforcing steel plate may also be welded to the upper surface of the reinforced section R of the H-shaped steel 10. [Explanation of symbols]

[0023] R...Reinforced section (specified section) 1...Covering plate 2...Existing building 3...Floor 4...Beam 5...Demolition debris 10, 10A... H-beam 11... Web 12... Bottom flange 13... Top flange 20A, 20B, 20C, 20D, 20E...Stiffening plate 21...Steel bar 21R...Steel bar (anti-slip steel) 30...Demolition heavy equipment 31...Crusher 32...Crawler

Claims

1. A plurality of steel sections arranged substantially parallel to each other and joined together; and a stiffening plate provided in a predetermined section in the longitudinal direction of the structural steel, A covering plate characterized in that the stiffening plate is joined to the lower and upper ends of the structural steel at both ends in the width direction.

2. 2. The covering plate according to claim 1, wherein a reinforcing steel plate or an anti-slip steel material is welded and fixed to the upper surface of the predetermined section of the structural steel.

3. A method for demolishing an existing building using the covering plate according to claim 1 or 2, A step of laying the covering plate between a plurality of beams on the floor surface of the floor to be demolished; A method for demolishing an existing building, comprising the steps of: moving a demolition machine on the covering plate while using a crusher of the demolition machine to demolish the existing structure of the floor to be demolished.

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