JP2991430B1 - Method for removing buried asbestos pipe and apparatus therefor - Google Patents

Abstract

Abstract: A buried asbestos pipe is removed without causing asbestos to scatter and without performing a filing operation on a skeleton. A shaft (19) having an ultra-high pressure water jet nozzle head (25) at its tip is held back and forth along the longitudinal direction of the member and rotatable about an axis, and the shaft (19) is moved from an asbestos pipe upper port (1c). The suction hose 10 of the vacuum wheel 5 is connected to the lower end 1a of the asbestos tube 1. After the shaft 19 is inserted to the bottom of the hole of the asbestos tube 1, the shaft 19 is rotated around the axis, and at the same time, the asbestos is ejected from the extra-high-pressure water jet nozzle head 25 while being pulled up to the insertion source side. Tube 1
Is continuously crushed, and the asbestos dust and asbestos fragments crushed by the suction hose 10 connected to the lower end port 1a of the asbestos pipe 1 are removed by suction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the dismantling of an old building using asbestos pipes, and without removing asbestos (asbestos) and removing the asbestos pipes without performing burring work on the skeleton. And a device therefor.

[0002]

2. Description of the Related Art At present, asbestos dust has been found to cause mesothelial species and lung cancer.
Although there are strict restrictions on its use, asbestos (asbestos) has not been regulated in the past, and asbestos was frequently used as an insulating material or insulating material in buildings.

[0003] In recent years, the time of dismantling of old buildings using asbestos has come, and the dismantling method has become a problem.

For example, in an apartment house or the like, an asbestos pipe is buried in a skeleton as a heat exhaust pipe of a bathroom bathtub, and when disassembling the building, the asbestos pipe is first removed before disassembling the skeleton. In removing the asbestos pipe, the skeleton is crushed by a breaking machine such as a breaker along the burying direction of the pipe, and if the asbestos pipe is exposed, it is maintained in a wet state by sufficiently spraying water etc. and asbestos does not fly Work was proceeding with the removal procedure.

[0005]

However, in the above-mentioned dismantling method, there is a problem that the disassembling operation cannot be performed efficiently because a considerable amount of time and labor is required for the severing operation of the frame, and the asbestos as much as possible. Even when working while moistening so that asbestos would not be scattered, asbestos scattering could not be completely prevented, and problems such as workers and surrounding residents being affected by the danger of asbestos dust occurred. .

Accordingly, a main object of the present invention is to propose a method and an apparatus for removing an buried asbestos pipe without scattering asbestos and without performing a filing operation on a skeleton.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a removing method for removing an asbestos pipe buried in a building body along a substantially vertical direction. A shaft equipped with a high-pressure water jet nozzle head is held forward and backward along the longitudinal direction of the member and rotatably around the axis, and the shaft is inserted through an upper port of the asbestos pipe, while a lower port of the asbestos pipe is inserted. A suction hose is connected to the suction hose, and the suction hose is connected to a decompression device so that suction and removal can be performed.After the shaft is inserted to the bottom of the hole of the asbestos tube, the shaft is rotated around the axis. The asbestos tube is continuously crushed by injecting ultrahigh-pressure water from the ultrahigh-pressure water injection nozzle head while pulling up to the insertion source side, and the suction hoe connected to the lower end of the asbestos tube. It is characterized in that the suction removal of asbestos dust and asbestos pieces that had been disrupted by.

In this case, the ultra-high pressure water injection nozzle head includes one or a plurality of asbestos pipe crushing injection nozzles whose injection ports are directed obliquely downward, and has an injection port substantially below. It is desirable to provide a blockage-preventing injection nozzle directed to prevent the blockage in the pipe by the asbestos fragments crushed by the water jetted from the blockage-prevention injection nozzle. Further, using a vacuum truck as the suction removal equipment including the suction hose and the decompression device can simplify the equipment and efficiently perform the work.

Further, the asbestos dust and the asbestos chips collected through the suction hose are led to a sedimentation tank, and after the asbestos fine particles are removed from the supernatant water after coagulation and sedimentation by a filter, the asbestos fine particles are discharged. It is desirable to do so.

On the other hand, a first crushing device for crushing and removing the asbestos pipe comprises a device base having a plurality of casters and outriggers on the lower surface side, and a guide column supported upright on the upper surface side of the device base. A drive propulsion device that can move up and down along the guide column, and an ultra-high-pressure water jet nozzle head at the end supported by the propulsion device so as to be rotatable around the axis and to move back and forth along the longitudinal direction of the member. Wherein the second crushing device comprises: a base plate anchored to the slab surface; and a guide supported upright on the upper surface side of the base plate. A support, a plurality of stay legs for assisting the guide support to stand up, a drive propulsion device capable of ascending and descending along the guide support, and the propulsion device is rotatable around an axis and Is forward and backward freely supported along the timber longitudinal direction, is characterized in that is composed of a shaft with an ultra high pressure water jet nozzle head to the tip.

In this crushing apparatus, the ultrahigh-pressure water injection nozzle head includes one or a plurality of crushing injection nozzles whose injection ports are directed obliquely downward, and has an injection port substantially below. It is desirable to have a blocking-preventing spray nozzle directed toward the nozzle, and each of the crushing spray nozzles whose spray ports are directed obliquely downward has a change in the spray angle for each spray nozzle or for each group. desirable.

[0012]

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

In an old apartment house T shown in FIG. 1, asbestos tubes 1, 1,...
Are buried in the skeleton along the vertical direction. In the illustrated example, as shown in FIG. 2, asbestos pipes 1A to 1D for each floor are buried side by side in a concrete wall 2, and each asbestos pipe 1 has two heat exhaust ports at the lower end. 1a and 1b, and the upper end opening serves as the exhaust heat discharge port 1c.

[Apparatus Configuration] In order to remove the asbestos pipe 1, in this method, as shown in FIG. 3, the exhaust heat discharge port 1c of the asbestos pipe 1 to be removed, that is, the upper part of the asbestos pipe 1 to be removed. An asbestos pipe crushing device 3 installed on a rooftop portion having an open mouth, a pump 4 for supplying ultra-high pressure water to the asbestos pipe crushing device 3, and a heat exhaust port 1 at the lower end of the asbestos pipe 1
The removal is performed using the vacuum truck 5 in which the suction hose 10 is connected to a. As shown in FIG. 4, the suction hose 10 of the vacuum wheel 5 is connected to the lower one of the two exhaust ports 1a, and is connected to the upper one of the exhaust ports 1b. Is closed by the sealing plate 12 at least during construction.

Each of the devices will be described in detail below. The asbestos tube crushing device 3 has a plurality of casters 14, 14... On a lower surface side and a plurality of outriggers 15 as shown in detail in FIG. , 15 are mounted on a top surface side of a device base 13 provided with a drive propulsion device 18 that can move up and down along the guide column 17. Inside the guide column 17, an upper sprocket 21 is disposed at an upper portion, and a lower sprocket 22 is disposed at a lower portion.
A chain 23 is provided between the pair of sprockets 21 and 22.
Is wound, the operating rod 18a of the drive propulsion device 18 is fastened to the chain 23, and the lower sprocket 22 is rotated by the drive motor 24, so that the chain 23 travels in the winding direction and the drive propulsion is performed. Apparatus 1
8 can move up and down along the guide column 17.

The drive propulsion device 18 holds a shaft 19 provided with an ultra-high pressure water jet nozzle head 25 at the tip. The drive propulsion device 18 moves up and down along the guide column 17 so that the shaft 19 becomes a member. It can move forward and backward along the longitudinal direction and can rotate around the axis by a drive motor 26 attached to the drive propulsion device 18. The shaft 19 is held at a predetermined position on the lower end side of the guide column 17 by a sent riser 29, and a swivel 27 is provided at an upper end portion. An ultra-high pressure hose 28 is connected through the swivel 27. I have.

Further, as shown in detail in FIG. 6, one or more ultra-high pressure water jet nozzle heads 25 provided at the tip end have their jet ports directed obliquely downward.
In addition to the two crushing injection nozzles 29a and 29b, the crushing injection nozzle 29c having the injection port directed substantially downward is provided. The crushing injection nozzle 29
The injection angles of a and 29b are generally in the range of 20 to 40 °, and the respective injection angles α and β are made different. For example, if the injection angle β of one crushing injection nozzle 29a is set to about 35 °, the injection angle α of the other crushing injection nozzle 29b is set to about 25 °. Each crushing injection nozzle 29
By varying the injection angles at a and 29b, when the shaft 19 is rotated around the axis, the projection range of the ultra-high pressure water can be made wider, and the crushing efficiency is improved. In this example, two injection nozzles are set as the crushing injection nozzles. However, if the number is larger than this, two or more types of injection angle setting patterns are determined in advance, and for each injection nozzle, What is necessary is just to assign the said set injection angle pattern alternately around a circumference. Of course, the injection angle may be slightly changed for all of the crushing injection nozzles.

On the other hand, the blockage-preventing injection nozzle 29c, whose injection port is substantially directed downward, injects high-pressure water downward during crushing and pulling up, so that the crushing injection nozzle 29a, 29b is an injection nozzle provided to prevent crushed pieces of the asbestos pipe 1 crushed by 29b from being clogged in the pipe, and the injection direction has a slight angle (about 2 to 5 °) with respect to the vertical direction. It is desirable to make it. By slightly inclining from the vertical direction, when the shaft 19 is rotated around the axis, high-pressure water can be sprayed over a predetermined angle range, so that blockage in the pipe can be efficiently prevented.

Next, a second asbestos pipe crushing apparatus 3A shown in FIGS. 7 and 8 is an example in which the apparatus is simplified, and the base plate 3 fixed to the slab surface by an anchor.
0, a guide column 31 supported upright on the upper surface side of the base plate 30, two stay legs 32A and 32B for assisting the guide column 31 to stand up, and the guide column 31 is vertically movable along the guide column 31. A drive propulsion device 33 and a shaft 19 having an ultrahigh-pressure water jet nozzle head 25 at the tip, which is held by the drive propulsion device 33 and is capable of moving forward and backward along the longitudinal direction of the member and rotatable around the axis. The device is composed of Like the first device, the propulsion drive of the drive propulsion device 33 is performed by causing a drive motor 34 to travel a chain 35 that is endlessly bridged between sprockets arranged at the upper and lower ends of the guide column 31. The rotation of the shaft 19 is carried out between a driving sprocket 36a of a driving motor 36 attached to the driving propulsion device 33 and an annular sprocket 19a fixed to the shaft 19, as shown in FIG. The driven chain 27 is rotated by driving.

On the other hand, a pump car 4 for supplying ultra-high pressure water to the asbestos pipe crushing apparatuses 3 and 3A is mechanically constructed as shown in FIG.
As shown in FIG. 3, a vehicle equipped with an ultrahigh-pressure water generator 6 including a hydraulic unit 44, a water supply unit 45, a booster (pressure intensifier) 46, and an accumulator 43 on a carrier, and The piston in the booster 46 is moved left and right by the hydraulic oil thus generated, and compresses the water in the water chamber to generate ultra-high pressure water. Further, the pressure of the ultra-high pressure water is kept constant by interposing the accumulator 43 in the middle of the feeding path. Typically, the Ultra-high-pressure water generator 6 can generate the 1000~4000kgf / cm ² of about ultrahigh pressure water, the crushing of the asbestos pipe 1 is set to the injection pressure of 2300~2500kgf / cm ² .

On the other hand, as a device for sucking and removing asbestos dust and asbestos fragments crushed by the asbestos pipe crushing devices 3 and 3A, the vacuum wheel 5 may be used most simply and efficiently. Alternatively, a device including a suction hose, a decompression device, and a storage tank may be provided at the work site. In short, any device can be used as long as it can suck and remove asbestos dust and asbestos fragments generated by crushing by applying a negative pressure through a suction hose 10 connected to the lower end of the asbestos tube 1 without leaking to the outside. .

The asbestos dust and asbestos chips (hereinafter referred to as asbestos collected water) collected together with the jet water by the vacuum truck 5 are transported to a treatment facility at a site or a treatment facility provided at a predetermined location, and the asbestos fraction is collected. After is separated,
It is released.

More specifically, as shown in FIG. 11, sedimentation separation tanks 50A to 50C whose interiors are divided into three tanks by partition walls 51, 51 are connected in series, and first the first sedimentation separation tank 5
At 0 A, asbestos recovered water is charged from the vacuum truck 5. In the process of asbestos recovery water, the water overflowing the partition walls 51, 51 flows into the sequentially partitioned tanks, and relatively heavy asbestos pieces and the like are settled and separated by gravity sedimentation. The next settling / separation tank 50B is set by the submerged pump 52 set in the final compartment tank.
The asbestos fibers floating in the water are aggregated and settled by adding a polymer coagulant in 50C, which is transported in the order of 50C and becomes the final sedimentation tank. 25-100 μm which cannot be separated even by these sedimentation separation tanks 50A-50C
For m-class asbestos fine particles, the supernatant water passed through these sedimentation / separation tanks 50A to 50C is further filtered 53%.
After removing the asbestos fine particles by the above method, the asbestos is discharged into sewage.

[Construction Procedure] A procedure for removing the asbestos pipe using the above-described devices will be described in detail with reference to FIG.

First, before starting the operation, the situation before the asbestos tube 1 is removed is photographed by a CCD camera. FIG.
As shown in FIG.
A D camera 55 is attached, inserted through the exhaust heat discharge port 1c of the asbestos tube 1, taken over the entire length in the longitudinal direction, and recorded in a video.

Next, as shown in FIG.
The asbestos pipe crushing device 3 is installed at the upper mouth portion (rooftop) of the asbestos pipe 1, and of the two heat exhaust ports provided at the lower end of the asbestos pipe 1, the upper-stage heat exhaust port 1 b is closed by the sealing plate 12. The suction hose 10 of the vacuum truck 5 is connected to the lower heat discharge port 1a. Further, in the asbestos pipe crushing apparatus 3, the shaft length is increased by sequentially adding the shaft rods, and the ultra high pressure
To the bottom of the hole.

When the preparatory work so far is completed, the crushing and removal of the asbestos tube 1 is started. The suction by the vacuum truck 5 is started, and the pump truck 4 is operated to supply the ultra-high pressure water to the asbestos pipe crushing device 3. In the asbestos tube crushing device 3, as shown in FIG. 12C, the drive propulsion device 18 is slowly raised while rotating the shaft 19 around the axis, so that the asbestos tube is pulled up in the process of pulling up the shaft 19. The crushing of 1 is performed from the lower side to the upper side. At this time, the rotation speed of the shaft 19 is generally 150 to 220 rpm, and the pulling speed is 300 to 400 mm / mi.
Desirably set to n. The extra shaft rod is sequentially cut off as the shaft 19 is pulled up.

When the ultra high pressure water injection nozzle head 25 reaches the exhaust heat discharge port 1c and the crushing and removal of the asbestos tube 1 is completed over the entire length, it is checked whether there is any crushing residue.
The CCD camera 55 is inserted into the hole as shown in FIG. 12 (A), and the entire length is checked. If there is any crushing residue, the depth position is checked, and then the shaft 19 is removed. It is inserted up to the crush remaining portion, and crushing is again performed around this area by ultra-high pressure water injection.

On the other hand, the asbestos collected water collected by the vacuum truck 5 is sent to the sedimentation / separation treatment step as described above, and the supernatant water after the sedimentation / aggregation / separation treatment is further filtered and then discharged to the sewer pipe. I do.

The above operation is repeated for each asbestos tube 1, and all the asbestos tubes 1, 1... Are removed.

[0031]

As described above in detail, according to the present invention, the buried asbestos pipe can be easily removed without scattering asbestos and without performing the work of breaking the frame.

[Brief description of the drawings]

FIG. 1 is an overall view of an apartment house in which an asbestos tube 1 is used as a heat exhaust pipe.

FIG. 2A is a longitudinal sectional view of an asbestos pipe burial site,
(B) is an BB line arrow view of (A).

FIG. 3 is a diagram showing a removal operation procedure of the asbestos tube 1;

FIG. 4 is a connection diagram of a suction hose at a lower portion of the asbestos tube 1.

FIG. 5 is a side view showing a first example of the asbestos pipe crushing apparatus.

FIG. 6 is a partially cutaway enlarged view of the ultra-high pressure water jet nozzle head 25.

FIG. 7 is a side view showing a second example of the asbestos pipe crushing apparatus.

FIG. 8 is a front view showing a second example of the asbestos pipe crushing apparatus.

FIG. 9 is an enlarged view of the drive propulsion device 33.

FIG. 10 is a configuration diagram of an ultrahigh-pressure water generator.

FIG. 11 is a set-up and separation procedure diagram of collected asbestos-mixed water.

12 (A) to 12 (C) are step-by-step diagrams showing how to remove the asbestos tube 1. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Asbestos pipe, 2 ... Body, 3 / 3A ... Asbestos pipe crusher, 4
... Pump car, 5 ... Vacuum car, 6 ... Ultra-high pressure water generator, 10 ... Suction hose, 13 ... Device base, 14 ... Caster, 15 ... Outrigger, 17 ... Guide support, 18
... Drive propulsion device, 19 ... Shaft, 25 ... Ultra-high pressure water injection nozzle head, 29a / 29b ... Crushing injection nozzle, 2
9c: Blocking prevention spray nozzle, 30: Base plate, 31 ...
Guide column, 32A / 32B: stay leg, 33: drive propulsion device, 50A to 50C: sedimentation separation tank, 53: filter, 55: CCD camera

Claims (8)

(57) [Claims] 1. A removing method for removing an asbestos pipe buried substantially vertically in a skeleton of a building, comprising: a shaft provided with an ultra-high pressure water jet nozzle head at a tip end thereof; To move forward and backward and rotate freely around the axis, insert the shaft from the upper port of the asbestos pipe, connect a suction hose to the lower port of the asbestos pipe, and depressurize the suction hose. After the shaft is inserted to the bottom of the hole of the asbestos tube, the shaft is rotated around the axis, and pulled up to the insertion source side from the ultra-high pressure water jet nozzle head. The asbestos tube is continuously crushed by injecting ultra-high pressure water, and the asbestos dust and asbestos fragments crushed by the suction hose connected to the lower end of the asbestos tube are removed by suction. Removing method of buried asbestos pipe, characterized in Rukoto. 2. The ultrahigh-pressure water injection nozzle head includes one or a plurality of asbestos pipe crushing injection nozzles whose injection ports are directed obliquely downward, and the injection ports are directed substantially downward. 2. The method for removing an embedded asbestos pipe according to claim 1, further comprising an injection nozzle for preventing blockage, wherein the asbestos pieces crushed by the water jetted from the nozzle for prevention of blockage prevent blockage in the pipe. 3. A vacuum truck is used as suction removal equipment including said suction hose and a pressure reducing device.
The method for removing a buried asbestos pipe according to any one of the above. 4. The asbestos dust and asbestos chips collected through the suction hose are guided to a sedimentation tank, and fine particles of asbestos are further removed from the supernatant water after coagulation and sedimentation by a filter, and then discharged. The method for removing a buried asbestos pipe according to any one of claims 1 to 3. 5. An apparatus base provided with a plurality of casters and outriggers on a lower surface side, a guide column supported upright on an upper surface side of the apparatus base, and a drive propulsion device capable of moving up and down along the guide column. And a shaft supported by the propulsion device so as to be rotatable around the axis and to move back and forth along the longitudinal direction of the member, the shaft having an ultra-high pressure water jet nozzle head at the tip. Pipe crushing equipment. 6. A base plate anchored to the slab surface, a guide column supported upright on the upper surface of the base plate, a plurality of stay legs for assisting the guide column to stand up, and the guide column. A drive propulsion device capable of moving up and down along the shaft, a shaft provided with an ultrahigh-pressure water jet nozzle head at the tip end, which is rotatably supported around the axis by the propulsion device and is capable of moving back and forth along the longitudinal direction of the member. An asbestos pipe crushing device characterized by comprising: 7. An ultra-high pressure water injection nozzle head includes one or a plurality of crushing injection nozzles whose injection ports are directed obliquely downward, and the blockage prevention whose injection ports are substantially directed downward. The asbestos pipe crushing apparatus according to any one of claims 5 and 6, further comprising an injection nozzle. 8. The asbestos pipe crushing apparatus according to claim 7, wherein each of the crushing injection nozzles whose injection ports are directed obliquely downward has a change in the injection angle for each injection nozzle or for each group.