JPH07127281A - Slab structure allowing for demolition of building - Google Patents

Abstract

PURPOSE:To enhance the efficiency of demolition by embedding flexible pipes in a slab, and providing nozzle holes outside the slab which are connected to the flexible pipe. CONSTITUTION:A thin-walled line 1 which is a flexible pipe is embedded in a slab S made of reinforced concrete surrounded by four columns C1-C4 and beams B1-B4, in such a way that the line 1 takes a wavy form throughout the center surface of the slab S and from the column C1 to the column C4. A first nozzle hole A1 is provided via a first valve V1 by a line 2 projecting to the lower side of the slab S and a second nozzle hole A2 is provided via a second valve V2 by a line 3 at the end portion of the column C4. To demolish the building, the valves V1, V2 are opened and pressurized oil is injected through the nozzle hole A1, A2 to inflate the line 1; the pressure of the oil is transmitted to the concrete to exert tensile force to generate a number of cracks, thereby improving the separability of the concrete from the reinforcement; then the slab S is exerted with an external force using a crusher and is demolished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab structure in consideration of dismantling a building.

[0002]

2. Description of the Related Art Conventionally, the dismantling of concrete buildings is done by directly applying an external force with a steel ball, a crusher, a wire saw, etc., a method of crushing with a flame jet or electric current, and a chemical substance by drilling holes and filling it with chemical substances. Various construction methods have been used, such as a method of crushing by reaction body expansion.

[0003]

For example, the method of applying an external force by a crusher or the like gives a strong side, that is, a compressive force as a characteristic of concrete, so that the disassembling efficiency of the concrete and the reinforcing bars and the steel frame is poor and the dismantling efficiency is low.

An object of the present invention is to provide a structure of a slab in consideration of dismantling which improves the dismantling efficiency by improving the separability of concrete from reinforcing bars and steel frames.

[0005]

According to the present invention, a flexible tube is embedded inside a slab, and an injection port connected to the flexible tube is provided outside.

Further, according to the present invention, a non-flexible thin-walled tube is embedded inside the slab, and an injection port connected to the non-flexible thin-walled tube is provided outside.

The flexible tube or the non-flexible thin-walled tube is
It is preferable to embed the entire surface of the slab and always use it as a floor cooling and heating pipe.

Further, it is preferable that the flexible tube body is made of a thin metal tube or a synthetic rubber tube.

Further, it is preferable that the non-flexible thin-walled tube body is composed of a thin-walled metal tube or a plastic tube that is reliably crushed by pressure.

Further, it is preferable that the injection material has fluidity such as oil and water and surely expands the tubular body.

[0011]

In the structure of the slab constructed as described above in consideration of disassembling, when high pressure oil, for example, is injected into the flexible pipe or the non-flexible thin pipe from the inlet, the flexible pipe is The non-flexible thin-walled tube expands, the oil pressure is transmitted to the concrete as it is, and the tensile force acts on the concrete. Therefore, cracks are effectively generated in the concrete which is weak in tensile force, and the concrete is well separated from the reinforcing bar and the steel frame. As a result, the dismantling efficiency by the conventional method thereafter is improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, four pillars C are provided around the periphery.
1 to C4 and slabs S made of reinforced concrete surrounded by beams B1 to B4, a thin pipe 1 which is a flexible pipe body is buried in a wave shape from a column C1 to a column C4 over the entire center surface. There is. A first inlet A1 is provided at an end of the pipe 1 on the side of the column C1 through a first valve V1 by a pipe 2 protruding to the lower surface of the slab S, and an end of the pipe C4 at the side of the column C4 is provided with the first injection port A1. Similarly to the side, the second inlet A2 is provided through the second valve V2 by the pipe 3. In addition,
One of the inlets A1 and A2 can be omitted.

This pipe 1 also serves as a pipe for floor heating, for example. At the end of the pipe 1 on the side of the pillar C1, a pipe 4 is provided with a hot water supply port 5 via a third valve V3. At the end on the side of the pillar C4, a hot water discharge port 7 is provided by a pipe 5 via a third valve V3.

As shown in FIG. 3, the pipe 1 has a shape in which one projecting portion a is projected inward as shown in FIG. 3 by a thin metal material M, or the pipe 1a has a rectangular shape as shown in FIG. ,
It is formed in an appropriate shape. Instead of the thin metal material M, a synthetic rubber material can be used.

Further, instead of the flexible pipe body, a non-flexible thin pipe such as a thin metal pipe or a plastic pipe may be formed. In that case, the cross-sectional shape may be any suitable shape.

Next, the operation will be described.

When the pipe 1 is used as a floor heating pipe, the first valve V1 and the second valve V2 are closed, the third valve V3 and the fourth valve V4 are opened, and hot water is supplied from the hot water supply port 5. Discharge from the hot water outlet 7.

When the building is demolished, the third valve V3 and the fourth valve V4 are closed and the first valve V1 and the second valve V4 are closed.
2 is opened, and oil pressurized by, for example, a hydraulic pump is injected from the first injection port A1 and the second injection port A2. Then, the pipe 1 expands as shown in FIG. 4, or the pipe 1a expands as shown in FIG. 6, many cracks K are generated in the concrete, and the separability between the concrete and the reinforcing bar is improved. This is because a tensile force is generated in the concrete due to the expansion of the pipes 1 and 1a, and concrete having a characteristic weak against the tensile force is partially cut.

When the pipe is a non-flexible pipe, the pipe is easily broken by the high pressure of oil, and the concrete is cracked by the pressure of the high-pressure oil.

Then, an external force is applied to the slab S by, for example, a crusher to separate the concrete and the reinforcing bar, the reinforcing bar is cut and removed, and the slab is dismantled.

FIG. 7 shows another embodiment of the present invention, in which a pipe 1A for floor heating which has substantially the same structure as that of the slab SA shown in FIG. 1 is provided with valves V5 to V13 and an inlet A1. A
2, 5A, 5B, 7, 7a to 7c, the hot water supply port 5,
This is an example in which the hot water discharge port 5c is provided to define a plurality of injection crushing ranges.

FIG. 8 also shows another embodiment of the present invention, in which the pipe 1B of the slab SB is arranged in a wave form from the column 1C side to the column C3 side, and the first inlet A1 and the second inlet are provided at both ends, respectively. This is an example in which A2 is provided.

FIG. 9 also shows another embodiment of the present invention, in which the pipes 1C of the slab SC are arranged in a spiral shape which is inverted from the column C1 side to the column C3 side, and the first inlet A1 and the first inlet A1 This is an example in which two injection ports A2 are provided.

FIG. 10 also shows another embodiment of the present invention, in which the pipe 1D of the slab SD is spirally arranged from the side of the column C2 to the central portion, and the first inlet A1 and the second inlet A2 are provided at both ends, respectively.
This is an example in which the inlet A2 is provided.

[0026]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the flexible pipe or the non-flexible thin wall pipe is expanded to suitably generate cracks in the concrete, and The disassembling efficiency can be improved by improving the separability from the steel frame.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a cross-sectional view showing an example of piping.

FIG. 4 is a cross-sectional view showing a state after expansion of the pipe of FIG.

FIG. 5 is a cross-sectional view showing another example of piping.

6 is a cross-sectional view showing a state after expansion of the pipe of FIG.

FIG. 7 is a plan view showing a second embodiment of the present invention.

FIG. 8 is a plan view showing a third embodiment of the present invention.

FIG. 9 is a plan view showing a fourth embodiment of the present invention.

FIG. 10 is a plan view showing a fifth embodiment of the present invention.

[Explanation of symbols]

 A1 ... 1st inlet A2 ... 2nd inlet B1-B4 ... Beam C1-C4 ... Column S, SA-SD ... Slab V1-V13 ... Valve 1, 1A-. 1D ... Piping 5 ... Hot water supply port 5a, 5b, 7, 7a to 7c ... Inlet port 5c ... Hot water discharge port

Claims (2)

[Claims] 1. A structure of a slab in consideration of dismantling of a building, wherein a flexible pipe is embedded in the slab, and an injection port connected to the flexible pipe is provided outside. . 2. A structure of a slab considering disassembly, characterized in that a non-flexible thin-walled tube is embedded inside the slab, and an injection port connected to the non-flexible thin-walled tube is provided outside. .