Demolition method for architectural structure

Abstract

To provide a demolition method for an architectural structure that can suppress circumferential diffusion of noise and deterioration of scenery while shortening the work period by the use of heavy machines for demolition.SOLUTION: The present invention relates to a demolition method for an architectural structure 1 having a dome-shaped rood 3, and the method includes: installing a heavy machine 6 for demolition in the inside 1A of the architectural structure 1; and demolishing the dome-shaped roof 3 successively from the center side to the outer peripheral side while leaving an undemolished part 3A on the outer peripheral side of the dome-shaped roof 3 as a sound insulation barrier in such a way that demolition debris 7 is dropped into the inside 1A of the architectural structure 1 by the heavy machine 6 for demolition.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a method for demolishing a building having a dome-shaped roof. relates to.

Background Art

[0002] In Patent Document 1, in a method for demolishing a building (storage tank) having a dome-shaped roof (1), a worker cuts the dome-shaped roof (1) into blocks from above the roof (block demolition), and the cut blocks are carried out to the outside by a crane. It is described that the dome-shaped roof (1) is demolished from the central side toward the outer peripheral side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the demolition method described in Patent Document 1, since demolition can be performed without using a demolition crane, there are advantages such as low operating noise and demolition work noise of the demolition crane, and less likelihood of problems with noise diffusion to the surroundings. However, since a demolition crane is not used, there is a problem that demolition takes time and the construction period is prolonged. In addition, block demolition from above the roof by workers is performed by installing a scaffold on the roof, so the scaffold installed on the roof and the workers working on the roof are exposed to the outside, which also causes a problem of deterioration of the landscape. In view of this situation, the main problem of the present invention is to provide a method for demolishing a building that can shorten the construction period by using a demolition crane while suppressing the diffusion of noise to the surroundings and the deterioration of the landscape.

Means for Solving the Problems

[0005] A first characteristic configuration of the present invention is a demolition method for a building having a domed roof, wherein a demolition crane is installed inside the building, and the domed roof is disassembled in order from the central side toward the outer peripheral side while leaving an undemolished portion on the outer peripheral side of the domed roof as a soundproof wall in such a manner that demolition debris is dropped inside the building by the demolition crane.

[0006] According to this configuration, since the demolition is carried out in such a manner that the demolition debris is dropped inside the building by the demolition crane installed inside the building, the demolition work can be efficiently performed in a short time, and the construction period can be shortened. At this time, since the domed roof is disassembled in order from the central side toward the outer peripheral side in such a manner that the undemolished portion on the outer peripheral side of the domed roof is used as a soundproof wall, the operation noise of the demolition crane, the demolition work noise, the falling noise of the demolition debris, etc. can be suppressed from spreading as noise by the undemolished portion on the outer peripheral side of the domed roof, and the demolition crane, etc. can be hidden from the outside to suppress the deterioration of the landscape.

[0007] A second characteristic configuration of the present invention is that the domed roof is provided with annular frame portions that are continuously annular in the circumferential direction of the domed roof at intervals in the radial direction of the domed roof, the domed roof is divided into a plurality of areas in a substantially concentric shape such that the annular frame portions of the domed roof are included on the inner peripheral side, when disassembling the domed roof in order for each of the areas from the central side toward the outer peripheral side, the load of the domed roof is not supported by construction support means, so that the annular frame portions that are sequentially left annularly on the inner peripheral side of the undemolished portion on the outer peripheral side of the domed roof function as compression rings.

[0008] When disassembling a dome-shaped roof in order for each area from the central side to the outer peripheral side, for example, it is conceivable to install construction support means such as a vent gantry inside the building and support the load of the dome-shaped roof with the construction support means. However, when supporting the load of the dome-shaped roof with the construction support means in this way, local bending stress concentration may occur at the support part by the support means in the undismantled part of the dome-shaped roof, and it is conceivable that the form of the undismantled part becomes unstable. In addition, the working range of the dismantling crane may be restricted by construction support means such as a vent gantry installed inside the building, and it is also conceivable that the dismantling work by the dismantling crane becomes inefficient.

[0009] On the other hand, according to this configuration, when disassembling a dome-shaped roof in order for each annular area from the central side to the outer peripheral side, the annular frame part that is sequentially left annularly on the inner peripheral side of the undismantled part on the outer peripheral side of the dome-shaped roof is made to function as a compression ring. Therefore, it is possible to resist evenly over the entire circumference against the force that the inner peripheral side of the undismantled part tries to fall downward. Thus, it is possible to suppress the occurrence of local bending stress concentration in the undismantled part of the dome-shaped roof as in the case of supporting the load of the dome-shaped roof with construction support means, and it is possible to stabilize the form of the undismantled part. Furthermore, since it is not necessary to install construction support means such as a vent gantry inside the building, the working range of the dismantling crane is not restricted by the support means, and the dismantling work by the dismantling crane can be efficiently performed.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0011] An embodiment of the building demolition method of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, this demolition method is a method of demolishing a dome-shaped roof 3 such as a partial spherical shape in a building 1 in order from the central side to the outer peripheral side (in the order of FIGS. 1, 2, and 3).

[0012] First, the building 1 to be demolished will be described. As shown in FIG. 1(b), this building 1 is provided with a roof support (lower floor) 2 in which a large number of columns, walls, etc. made of reinforced concrete, steel frames, etc. are arranged in a circular shape in plan view, and a dome-shaped roof 3 supported on the roof support 2. The dome-shaped roof 3 is supported by the roof support 2 with the outer peripheral portion fixed to the upper end portion of the roof support 2.

[0013] As shown in FIG. 1(a), the dome-shaped roof 3 has a single-layer latticed dome structure 31 in which a framework of triangular grids is combined in a lattice shape in plan view, and a roof material (not shown) made of a main house, a roof base, a waterproof sheet, etc. is supported on the latticed dome structure 31. A tension ring 32 is provided at the outer peripheral portion of the latticed dome structure 31 to resist the force that the structure tends to spread to the outer peripheral side due to its own weight with a tensile force.

[0014] The latticed dome structure 31 is composed of a large number of straight frame members 33 made of steel frames that are rigidly joined at each joint. In this latticed dome structure 31, there are 6 directions in which the frame members 33 pass straight from the center to the outer peripheral end. And an annular frame portion F that has vertices in each of the 6 directions and is continuously annular in plan view is configured to be arranged at predetermined intervals in the radial direction of the dome-shaped roof 3. Each frame member 33 is composed of a truss structural member in which upper chord members and lower chord members are connected by a large number of diagonal members (latticed members), bundled members, etc.

[0015] Next, the operation procedure of this demolition method will be described. As shown in Fig. 1(b), first, as preparation for demolition, a temporary enclosure 4 is installed so as to surround the site on which the building 1 is built, and a soundproof scaffold 5 is installed so as to surround the building 1 within the site. Although details will be described later, in this demolition method, since the undemolished portion 3A on the outer peripheral side of the dome-shaped roof 3 is used as a soundproof wall, the height of the soundproof scaffold 5 can be reduced accordingly, and the height of the soundproof scaffold 5 is set to a relatively low height comparable to the height of the roof support 2 to achieve labor saving and cost reduction in the installation work.

[0016] Also, as shown in Fig. 1(a), the dome-shaped roof 3 is divided into a number of areas A1 to A5 arranged in a substantially concentric circle. Here, the areas A2 to A5 excluding the area A1 including the center of the dome-shaped roof 3 are annular areas in a hexagonal shape in plan view with a radial 1-span (1 grid width) in which the annular frame portion F is included on the inner peripheral side.

[0017] Furthermore, during the demolition work, in order to monitor the stress changes in each part of the dome-shaped roof 3, strain gauges (an example of stress measuring tools) for measuring changes in tensile stress and compressive stress are installed on the frame members 33 at a number of stress measurement points included in each area A1 to A5 of the dome-shaped roof 3. At this time, since the frame member 33 is composed of a truss structural member, strain gauges are installed on the lower surfaces of the upper chord member and the lower chord member of the frame member 33, respectively.

[0018] Then, as shown in Figs. 2 and 3, a demolition crane 6 is installed inside the building 1A of the building 1, and the dome-shaped roof 3 is demolished area by area in order from the central side to the outer peripheral side while leaving the undemolished portion 3A on the outer peripheral side of the dome-shaped roof 3 as a soundproof wall in a form in which the demolition scrap 7 is dropped into the interior 1A of the building 1 by the demolition crane 6. In this embodiment, the demolition is carried out in the order (in the order of description) of the area A1, the area A2, the area A3, the area A4, the area A5, the area A5, and the portion remaining on the outer peripheral side of the area A5.

[0019] For example, as shown in FIG. 2, when disassembling area A2, the disassembly of the dome-shaped roof 3 is carried out while leaving the undismantled part 3A on the outer peripheral side of the dome-shaped roof 3 including areas A3 to A5 as a sound insulation wall. Also, as shown in FIG. 3, when disassembling area A5, the disassembly of the dome-shaped roof 3 is carried out while leaving the undismantled part 3A on the outer peripheral side of the dome-shaped roof 3 including area A5 as a sound insulation wall. By doing so, the undismantled part 3A on the outer peripheral side of the dome-shaped roof 3 suppresses the diffusion of the operating sound of the demolition crane 6, the demolition work sound, the falling sound of the demolition debris 7, etc. as noise S to the outside, and also hides the demolition crane 6 etc. from the outside to suppress the deterioration of the landscape. Incidentally, the demolition debris 7 that has fallen inside the building 1 can be used as a buffer material by moving it to the falling point by the next demolition work and spreading it.

[0020] The demolition work by the demolition crane 6 proceeds in a spiral manner generally in the same direction (such as clockwise) with one triangle grid constituting the lattice dome structure 31 of the dome-shaped roof 3 as a unit. By proceeding in a spiral manner in the same direction like this, the moving distance of the demolition crane 6 is minimized to improve the efficiency of the construction work. Also, this demolition work is carried out by cutting the frame material 33 with the demolition crane 6 and dropping the frame material 33 and the roof material supported by it. The cutting order of the frame material 33 is also set so as to minimize the moving distance of the demolition crane 6 to improve the efficiency of the construction work.

[0021] Here, when disassembling the dome-shaped roof 3 in order for each area from the central side to the outer peripheral side, by not supporting the load of the dome-shaped roof 3 with a construction vent scaffold (an example of a support means), the annular frame portion F that is sequentially left annularly on the inner peripheral side of the undismantled part 3A on the outer peripheral side of the dome-shaped roof 3 functions as a compression ring. Specifically, as shown in FIG. 2, when the disassembly of area A2 is completed, the annular frame portion F that remains annularly on the inner peripheral side of area A3 in the undismantled portion 3A is made to function as a compression ring. Also, as shown in FIG. 3, when the disassembly of area A5 is completed, the annular frame portion F that remains annularly on the inner peripheral side of area A5 in the undismantled portion 3A is made to function as a compression ring.

[0022] By making the annular frame portion F that remains annularly on the inner peripheral side of the undismantled portion 3A of the dome-shaped roof 3 function as a compression ring in this way, it is possible to resist evenly over the entire circumference against the force that the inner peripheral side of the undismantled portion 3A tends to fall downward. Therefore, it is possible to suppress the occurrence of local bending stress concentration in the undismantled portion 3A of the dome-shaped roof 3 as in the case where the load of the dome-shaped roof 3 is supported by the construction vent framework, and the form of the undismantled portion 3A can be stabilized. Furthermore, since it is not necessary to install the construction vent framework inside the building 1, the working range of the dismantling crane 6 is not restricted by the vent framework, and the dismantling work by the dismantling crane 6 can be carried out efficiently.

[0023] During the dismantling work, the stress at a large number of stress measurement points on the dome-shaped roof 3 is constantly measured with a strain gauge to obtain the measurement result (stress measurement result), and the displacement amount at a large number of displacement measurement points on the dome-shaped roof 3 is measured with a 3D surveying instrument to obtain the measurement result (displacement measurement result), thereby monitoring the stress state and displacement state of each part of the dome-shaped roof 3. And when the stress measurement result or displacement measurement result exceeds the management value, etc., the work is temporarily interrupted, and measures such as slowly resuming after considering countermeasures when exceeding the limit value are taken.

[0024] In this dismantling method, the portion remaining on the outer peripheral side of area A5 of the dome-shaped roof 3 has a small area and there is no problem with safety even if it collapses. Therefore, giving priority to work efficiency, the dismantling work is carried out in a form that goes around once from the inner peripheral side to the outer peripheral end. And finally, the roof support 2 is dismantled.

[0025] 〔Alternative Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of each of the embodiments described below are not limited to being applied alone, but can also be applied in combination with the configurations of other embodiments.

[0026] In the above-described embodiment, the case where the frame structure of the dome-shaped roof 3 to be disassembled is a single-layer latticed dome structure 31 in which a triangular grid framework is combined in a lattice pattern in plan view has been described as an example, but other frame structures may also be used. For example, the frame structure of the dome-shaped roof 3 to be disassembled may be a frame structure in which a number of arch beams extending radially in the radial direction of the dome-shaped roof 3 are provided, and circumferential beams continuously annular in the circumferential direction of the dome-shaped roof 3 are provided at intervals in the radial direction of the dome-shaped roof 3. In this case, in the area division in the disassembly method, the dome-shaped roof 3 may be divided into a plurality of areas in a substantially concentric shape such that the circumferential beam (corresponding to the annular frame portion) of the dome-shaped roof 3 is included on the inner peripheral side.

Explanation of Reference Numerals

[0027] 1 Building 1A Interior 3 Dome-shaped roof 3A Undisassembled part 6 Demolition crane 7 Demolition shed A1 - A5 Areas F Annular frame portion

Claims

1. A method for demolishing a building having a domed roof, comprising: installing a demolition crane inside the building, and demolishing the domed roof in order from the central side to the outer peripheral side while leaving the undemolished portion on the outer peripheral side of the domed roof as a soundproof wall in a form in which demolition debris is dropped inside the building by the demolition crane.

2. The domed roof is provided with an annular frame portion that is continuously annular in the circumferential direction of the domed roof at intervals in the radial direction of the domed roof, dividing the domed roof into a plurality of areas in a substantially concentric circle shape such that the annular frame portion of the domed roof is included on the inner peripheral side, When demolishing the domed roof in order for each of the areas from the central side to the outer peripheral side, by not supporting the load of the domed roof with construction support means, the annular frame portion that is sequentially left annularly on the inner peripheral side of the undemolished portion on the outer peripheral side of the domed roof functions as a compression ring. The method for demolishing a building according to claim 1.

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