JPH0355628B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for promoting and directing the destruction of an object to be destroyed, such as a concrete structure, earth, rock, or hardened asphalt, using an expansive substance. By inserting a partition material such as a plate or a Y-shaped plate into the hole (entirely) provided in the object to be destroyed, before or after filling the slurry of the expandable substance, heat can be transferred into the hole. Accumulates and increases vapor pressure in the pores,
Phenomenon where slurry spews out from the injection port (gun phenomenon)
A method for effectively destroying the object by preventing this is known (Japanese Patent Application Laid-open No. 6896/1983). As a result of repeated studies on a method for directing the destructive force of such a destructive material in a desired direction, the inventors of the present invention have created a cavity consisting of a pair of partition walls in the hole of the object to be destroyed, and It has been discovered that the above object can be achieved by filling the section with a destructible material and crushing the material to be destructed, and based on this knowledge, the present invention has been achieved. In other words, the present invention provides an expansion method in which the expansion is accelerated by adjusting the composition or by adding a hydration reaction accelerator, etc. In a demolition method in which a destructible material is filled and the material is rapidly reacted to quickly crush the object to be destroyed, a void portion consisting of at least a pair of partition walls is provided in the hole, and the void portion is Provided is a method for promoting the demolition of objects to be destroyed, such as concrete structures, earth, or hardened asphalt, which is characterized by directing and promoting the destructive force in a certain direction by injecting an expandable destructive material into the structure. It is something to do. To explain the present invention in further detail, holes are made in objects to be destroyed such as concrete structures, earth, rocks, and hardened asphalt, and an expandable destructive material slurry is filled in the holes, preferably mechanically using a formwork. In the method of quickly dismantling an object by causing the material to react rapidly while being restrained, it is possible to not only freely determine the direction of destruction of the object to be destroyed, but also to greatly increase the destructive force of the material. This is a method that can be greatly expanded. Conventionally, the state of destruction of the material to be destroyed by the expandable destruction material was as shown in Figure 1, so the destruction material 3
However, in the demolition promotion-oriented method of the present invention, as shown in FIGS. The cavity 7 constituted by
By providing a gap and filling the void with the destructive material slurry, the destructive force is not only directed in the direction of the arrow, that is, in a fixed direction;
The destructive force that would naturally go in all directions is blocked by the partition wall 6, and does not go in any other direction but is concentrated in a specific direction (arrow), so the destructive force in a specific direction is greatly accelerated. As a result, the crushing time can be greatly shortened, and the destructive force can be directed in a fixed direction. Further, for example, in FIG. 2, by controlling the distance l between the partition walls 6, the destructive force can be controlled more freely. In addition, Figure 3 shows the second
The left end of the pair of partition walls 6 in the figure is closed with a vertical wall,
This is an application example in which the destructive force is directed only in the right direction. The material of the partition wall 6 for directing and promoting the destructive force in a certain direction according to the present invention may be metal, alloy,
Natural and man-made members such as castings, concrete (such as high-strength concrete, steel and inorganic or organic fiber reinforced concrete), synthetic resins and wood are used, provided that the strength of the partition wall is greater than the breaking strength of the object to be destroyed. Any material may be used. Further, the shape of the cavity 7 formed from the partition wall 6 can be various shapes as illustrated in FIGS. 2 to 8. The smaller the distance between the surfaces of the partition walls, the greater the breaking force of the breaking material. The expandable destructive materials used in the present invention are lime-based, calcium sulfoaluminate-based, calcined dolomite-based, magnesia-based, and ordinary Bortland cement.
There are expansive substances such as blast furnace slag-bauxite-gypsum system, alumina cement-lime-gypsum system, and calcium aluminate-lime-gypsum system. In the method of the present invention, as shown in FIGS. 9 and 10, a disc-shaped iron plate with a welded round iron bar is installed in a hole, a destructive material slurry is injected into the hole to a predetermined height, and the disc-shaped iron plate is welded to a round iron bar. In addition to the method of organically restraining a shaped iron plate with a formwork, such as fixing it near the upper end of a hole with a single nut, the destructive force of the present invention can be applied to a hole in a fixed direction without using it in a formwork. A method of destroying the object by inserting a pair of partition walls for orientation and promotion, and closing the upper part of the hole with a lid using a cement composition mixed with sodium silicate, jet cement, etc. can also be applied. In the present invention, a hole is first drilled in the object to be destroyed, then a disc-shaped iron plate bonded with high-tensile steel wire by a known method is installed in the hole, and then the partition wall is inserted into the circle in the hole. Place it on a plate-shaped iron plate, then put a disc-shaped iron plate as a lid on it, tension the high-tensile steel wire with jacks until it reaches a predetermined tension through the sheath attached to the iron plate, and then insert the destructible material there. Pour the slurry to a predetermined height. By fixing the high-strength steel wire to the expandable destructive material, the prestressing force can be used to increase the destructive force. This method makes it possible to further increase the destructive force. The method of the present invention will be explained below based on the drawings. FIGS. 9 and 10 are explanatory diagrams showing one embodiment of the method of the present invention. First, a hole 2 is made in the object 1 to be destroyed. Next, iron disk 4
A round iron rod 5 is welded to the hole 2 and installed in the hole 2. Next, the partition wall 6 (iron plate) constituting the cavity 7 is inserted into the hole, and the destruction material slurry 3 whose expansion has been promoted by adding a hydration reaction accelerator during blend adjustment or kneading is added to the cavity 7. is injected into the cavity 7 to a predetermined height. Next, the iron disk 8 is fixed near the upper end of the hole 2 with a nut 9. The material to be destroyed under restraint then rapidly generates heat and generates a significant expansion pressure, which not only makes it possible to easily crush the object 1 to be destroyed, but also allows the crushing direction to be determined only in a certain desired direction. The method of the present invention is applicable regardless of whether the diameter of the hole is large or small. Partition wall 6
After the crushing work is completed, the restraining equipment can be recovered and reused in the same crushing work over and over again. Further, in the present invention, in order to improve the working ability, a structure in which only the partition wall 6 is bonded to the iron disk 4, and a structure in which the iron round bar 5 is bonded to these may be made and inserted into the hole. Alternatively, only the partition wall 6 may be simply inserted into the hole and the hole may be covered by a known method. Next, the present invention will be explained in more detail with reference to Examples. Example Mass concrete (300cm x 200cm x 100cm) 1
Six holes 2 each having a diameter of 50 mmφ and a depth of 90 cm were drilled at 50 cm intervals, and an iron round bar 5 of 5 mmφ was welded to an iron disc 4 with a diameter of 45 mmφ. Next, hole 2
Two iron plates (thickness: 5 mm x width: 38 mm x length: 80 cm) were inserted in parallel at regular intervals on top of the iron disc 4 inside as a partition wall 6. This partition wall 6 (2 iron plates)
1.5% by weight of a hydration accelerator was added to the destructible material 3 (manufactured by Sumitomo Cement Co., Ltd.) having the composition shown in Table 1, and the mixture was kneaded at a water ratio of 27% by weight to form the void 7 at the upper end of the void 7. It was injected close to the point. Finally, a 45mmφ iron disk 8
was placed on the upper end of the partition wall 6 (iron plate), and the iron disc 8 was fixed with a lid nut 9. The destruction material slurry then started to generate heat, and mass concrete 1 completed crushing in about 7 minutes after filling, reducing the crushing time and crushing only in a certain direction (arrow) (see Figures 10 and 11). . 14 is a crack. Note that an arc-shaped rod-shaped steel material 12 is inserted into the space 11 between the inner surface 10 of the hole 2 and the partition wall 6 (steel plate), and a certain interval is left between the partition wall 6 (two steel plates). Round iron bars 13, 13 for holding were arranged and fixed to the iron plates 6, 6 at points. In the present invention, as shown in FIGS. 10 and 11, destructive force is generated in a certain direction, and the destructive force is enhanced. 【table】

[Brief explanation of drawings]

Figure 1 shows the destructive force of the conventional method, Figure 2-
Figure 8 is a diagram showing an example of the shape of the partition wall for directing and promoting the destructive force of the present invention in a certain direction.
Figures 1 to 10 are explanatory diagrams showing one aspect of construction according to the method of the present invention, and Figure 11 is a diagram showing an example of a state of crushing of an object to be destroyed according to the method of the present invention. 1... Body to be destroyed (mass concrete), 2... Hole,
3...Destruction material, 4...Iron disk, 5...Iron round bar, 6...
Partition wall, 7...Gap, 8...Iron disk (lid), 9
... Nut, 10 ... Inner surface of hole, 11 ... Space between inner surface 10 of hole and partition wall 6, 12 ... Arc-shaped rod-shaped body, 1
3... Iron rods for holding the partition walls 6 at regular intervals;
14...Cracks.

Claims (1)

[Claims] 1. In holes made in objects to be destroyed such as concrete structures, earth, rocks, or hardened asphalt,
In the demolition method, the above-mentioned hole is filled with an expandable destructible material whose composition has been adjusted or whose expansion has been promoted by adding a hydration reaction accelerator, etc., and which rapidly reacts with the destructible material to quickly crush the object. A cavity formed of at least a pair of partition walls is provided therein,
By injecting an expandable destructive material into the void,
A method for promoting the demolition of objects to be destroyed, such as concrete structures, earth, or hardened asphalt, characterized by directing and promoting destructive force in a certain direction.