JPS60152796A - Destruction construction method using expansible destructingagent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crushing method using an expansive crushing agent for statically crushing rocks and concrete structures.

Conventionally, crushing of bedrock, rock and concrete IM structures,
Gunpowder'l') large machinery has been used for demolition work, but in order to carry out work in or around cities, it is necessary to develop a safe crushing method that produces less noise, vibration, dust, and flying debris. It was requested. Therefore, static crushing soil d1 was developed that crushes rocks, concrete, etc. by utilizing the volumetric expansion phenomenon caused by the hydration reaction of an expandable crushing agent whose main component is a lime-based inorganic compound.

Explaining the outline of this crushing method, this method (well, a hole is drilled in the rock, concrete, or structure as the object to be crushed, and a static crushing agent (hereinafter referred to as slurry) is applied inside the hole. The crushing agent slurry, which contains water, undergoes a hydration reaction and expands, gradually crushing the object.

Therefore, according to this construction method, is it noisy? 3. It is possible to carry out crushing work with almost no dust generation.

However, in the above method, when the hydration reaction in the crushing agent slurry rapidly progresses in C5, the temperature of the crushing agent slurry rises significantly and the water it contains vaporizes, generating a large vapor pressure. Therefore, a phenomenon occurs in which slurry is ejected outside the hole before crushing.

In view of this, in conventional construction methods of this type, the hydration reaction rate is suppressed by adjusting the composition of the crushing agent, and therefore the expansion pressure of the crushing agent slurry is also slowed down.
Concrete 1~ has caused a problem in that it takes a long time (usually one to several days) to crush objects such as rocks.

YolC1 In order to solve this problem, the pores of the crushed material are filled with
A method has been proposed in which the crushed crushing agent slurry is heated from the frontage side of the hole. To explain this method with reference to Figure 1, the object to be crushed is 1! The crushing agent slurry 3 mixed with water is filled into the holes 2 provided in the hole 2, leaving a small area around the 1'' part of the holes 2. Next, calcium oxide mixed with water is filled in the vicinity of the opening of the hole 2 as a heating source 4 that promotes the hydration reaction of the crushing agent and determines the detonation effect, or after the calcium oxide is filled. It absorbs water and causes calcium oxide to undergo a digestive reaction. In other words, -6 heat is generated due to the reaction between the oxidizing power lucium and water, and the upper part of the crushing agent slurry 3 that comes into contact with the heating source 4 is heated.

As a result of the above reaction, the calcium oxide layer transforms into a calcium hydroxide layer, and also causes volumetric expansion, which causes the opening of the hole 2 to bulge. On the other hand, the crushing agent slurry 3 near the part in contact with the heating source 4 rapidly undergoes a hydration reaction, hardens as the temperature rises, and tamps the slurry in the deep part of the hole 2 into the inside of the hole 2. Further, the crushing agent slurry located deep in the hole 2 is heated to accelerate the reaction and rapidly develop an expansion pressure. Therefore, according to the improved construction method mentioned above,
The crushing agent slurry 33 filled in the holes 2 of the object to be crushed is heated under a high expansion pressure for a short period of time in a state where the ejection phenomenon is suppressed by the sealing action of the hardened material of the crushing agent slurry in the heated FA4 and the portion in contact with it. Therefore, as mentioned above, the time required for crushing can be shortened compared to the conventional method.

In addition, in the above-mentioned crushing method, the crushing agent slurry is heated to 1. L side J: By heating, C heat is transferred from the upper part to the lower part, and the hydration reaction of the crushing agent occurs, so that the static crushing agent after the hydration reaction becomes porous. (I put the cap on the book, 1
;The water vapor generated by NiC during the reaction of the crushing agent slurry on the side is not blocked! It is short 11' without causing any eruption phenomenon.
,'+1f31'P￥4 stone, crushing to concrete 1 is completed. Therefore, if J is used in this shredding method, it will be safe.
1. It is possible to implement a crushing method that can crush objects extremely quickly.

However, in contrast to 4v, there were cases in which the b1σl crushing time could not be reduced by λ11 effectively with C3 in the =L method, which was designed to improve I-.

1. E4) l'>, in the Juki l2 method, heat source/l is added to the second part of the crushing agent slurry 3 to HHy (if
As shown in the figure, the contact surface with the crushing agent slurry 3 during heating 11+Ii/l is approximately 1n1, and the contact area is small. Therefore, the heat transfer from the superheat source 4 to the II &TI'+' agent slurry 3 is not carried out efficiently for a long time.
When using small-diameter holes (for example, when the diameter is 4 to 5 ctn or less), crushing may not be possible in a short time. However, in the cold season, the temperature of the concrete and rock around the hole is low, so the heat generated from the heating source diffuses into the surrounding area, causing the temperature of the crushing agent slurry to decrease. When using round small diameter holes, the area of the hole wall surface which is the heat diffusion surface is relatively large compared to the loss of the crushing agent slurry, so the heat m from the heating source is Surroundings (
This is thought to be due to the fact that the crushing agent slurry is unable to rise to a temperature of 4''-1, as the crushing agent slurry spreads to the inside of the object to be crushed.

The present invention was made in view of the above circumstances, and it is suitable for cold temperature conditions! [The purpose is to provide a crushing method that can shorten the crushing time, including when using a small diameter hole (for example, a hole with a diameter of 4 to 5 CW or less) for filling the crushing agent.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

In the Iζζ crushing operation using the expandable crushing agent of the present invention, a mixture of the expandable crushing agent and water is filled into the inside of the Iζ hole drilled in the object to be crushed, and then the inside of the hole is heated between [heated from the J part side]. In the crushing method, which is carried out by filling the heating source with the mixture and bringing the heating source into contact with the mixture, the heating source is charged with a crushing agent to expand the contact surface of the heating source to the mixture, and the crushing agent is inserted into the inside of the crushing agent slurry. The contact surface is characterized in that the contact surface is a protruding surface that protrudes toward the inside of the mixture.

FIGS. 2 to 4 are first views for explaining examples of the method of the present invention.

First, to explain the method shown in Fig. 2, a crushing agent slurry 3 made by mixing an expandable crushing agent and water at a predetermined ratio is placed inside a hole 2 drilled in an object 1 to be crushed at the upper end of the hole 2. Fill the area near the frontage with only 100 pieces left. Next, a powder made of one or more types of exothermic substances such as calcium oxide, aluminate, or substances that generate heat due to their hydration reaction is press-molded, or the lower surface is rounded. A heating source 5 in which quicklime, calcined dolomite, etc. are placed in a container made of paper, synthetic resin, metal such as iron, or non-ferrous metal and having good thermal conductivity and formed into a protruding columnar shape. is inserted into the opening L1 of the hole 2, and the circular fil-shaped protruding surface is brought into contact with the crushing agent slurry 3. Then, the heating source 5 absorbs water (muddy water or hot water as required), and a reaction between the exothermic substances and the water occurs.

The heat source 5 heats the crushing agent slurry 3 which rises in temperature due to the heat of reaction and forms a contact layer, but in the method shown in FIG.
Since the lower surface of the heating source 5 protrudes in a circular shape, the contact area between the heating source 5 and the crushing agent slurry 3 is wider than that of the conventional method described above, improving heat transfer efficiency, and the lower end of the heating source 5 Since it protrudes toward the inside of the crushing agent slurry 3, the crushing agent slurry 3 is heated until it reaches the inside of the crushing agent slurry 3.

Therefore, according to the construction method of the present invention shown in FIG. The crushing agent slurry 3 is reliably heated even under low temperature conditions or when the hole 2 is a small diameter hole.Therefore, according to this crushing method, work in cold weather or small diameter holes, which would be a problem with conventional methods, is possible. It is possible to shorten the crushing time even when work is required in a hole, and when working in warm weather or in a large diameter hole, the crushing time can be shortened using conventional methods.

Further, FIGS. 3(a) and 3(b) are diagrams showing another example of the crushing method of the present invention, in which the heating source 5 is as shown in FIG. A container 7 having a cylindrical protrusion 7a having a smaller diameter than the main body projecting from the bottom of the cylindrical main body is used, and the exothermic substance is housed in the container 7. The container 7 is made of water-permeable material (e.g. paper)
It is preferable to use a material (for example, synthetic resin, metal, etc.) that has a large number of small-diameter holes that allow water to penetrate therein, and a material that has good thermal conductivity is also preferable.

When the container 7 made of such a material is used, after storing the required width of the pyrogenic substance in the container 7, the pyrogenic substance is soaked with water by means such as immersing the container 7 in water up to the top. Absorb it and use it.

In addition, when the container 7 has a structure in which the surrounding wall is impermeable to water, a mixture of a pyrogenic substance and water is housed inside the container 7 and used as the heating source 5, or After containing the sexual substance, water is poured into the container 7 and the heating source 5 is heated.
Means such as use as a method is selected as appropriate.

According to the construction method shown in FIGS. 3(a) and (1)), the lower end of the heating source 5 has a cylindrical protrusion 5a, and this protrusion 5a is deep inside the crushing agent slurry 3. Since it is inserted, the crushing agent slurry 3 can be reliably heated and the crushing time can be shortened, similar to the method shown in FIG. 2 described above.

The shape and method of the lower protrusion of the heating source 5 used in the crushing method of the present invention may be determined by taking into consideration the usage conditions (temperature conditions, hole diameter, etc.), for example, as shown in Fig. 4 ( a)
, (+1), the surface area of the protrusion can be expanded by making the protrusion into a shape in which small spheres are connected, and the shape is not limited to the illustrated example.

As explained above, the crushing method of the present invention is a method in which a hole drilled in an object to be crushed is filled with a crushing agent slurry, and a heating source is arranged in the hole to be in contact with the crushing agent slurry. Since this is a crushing method in which the contact surface of the source of the crushing agent slurry is a protruding surface that protrudes toward the inside of the slurry, the upper part of the crushing agent slurry is wrapped around the protruding part of the heating source, and the crushing agent is It is possible to set the contact area between the slurry and the heating source to be large, thereby improving the efficiency of heat transfer from the heating source to the crushing agent slurry and making it possible to heat the crushing agent slurry (11). Furthermore, since the heating source is deeply inserted into the crushing agent slurry, it is possible to heat the inside of the crushing agent slurry.Therefore, according to the present invention, the IIX i conditions such as cold 11.+I etc. Even when the bottom or crushing hole is small in diameter and the heat is likely to escape, the upper part of the crushing agent slurry at the initial stage of crushing is reliably heated to avoid hardening and have a 11 stop effect, and the crushing agent slurry The interior is heated to promote the reaction of the crushing agent, and the expansion L is made wild in a short period of 11S, resulting in the effect of being able to shorten the crushing time compared to conventional methods.

Next, the present invention will be explained in more detail with reference to Examples.

[Example 1] Compressive strength 4.0 as shown in FIG. 5 (0) at an air temperature of 20°C.
A hole (small diameter hole) with a diameter of 40 mm and a depth of 80 CT11 was drilled in the center of the upper surface of Concrete 1 to Specimen
Type (manufactured by Sumitomo Cement Co., Ltd.) was made into a slurry and filled. Next, quicklime was placed in a water-absorbing cylindrical container (diameter 38III11, height 1OCT11) as shown in Figure 5(a), and after absorbing sufficient water, it was placed above the mite slurry in contact with the slurry. I set it up so that it would look like this. In this case, although the quicklime reached a high temperature, the S-mite slurry was not sufficiently heated, and it took about 20 hours to crush the concrete specimen.

Next, using similar concrete 1 to specimen 1 as shown in Fig. 5 (
b) Pour the same amount of quicklime into the water-absorbing container shown in Figure 5 (38 mm in diameter, cylindrical part height: 5 CT, 111 yen, 11 [part height: 15 cTn) as when using the container shown in Figure 5 (a)'.
After sufficiently absorbing water, it was similarly placed above the S-mite slurry inside the hole to avoid contact with it, and the crushing method of the present invention was carried out. In this case, the temperature of the S-mite slurry is "-!" It was possible to crush the concrete specimen '1 within 10 minutes immediately after setting up the container using the PY cylinder.

(Implementation 1 row 2) At a temperature of 5℃, on a limestone bench as shown in Figure 6 (C), 1111 intervals were placed ε at a distance of 1 m from the ridge 15.
30an in diameter (9 holes with a diameter of 55cm and a depth of 3cm) and slurried with an expansive crushing agent S-Mite V type Prol manufactured by Tomo Rento Co., Ltd. Fill C near f'' and lζ. Next, the circle fil shown in FIG. 6(a)
water absorbent container (if diameter C35mrn, height 20CW
I) Store quicklime in the tank and make sure it absorbs enough water. IC later S
-My 1- A container was placed so as to be in contact with the top surface of the slurry. In this case, it takes about 15 minutes before cracks appear between the holes.
It took n, '1.

J. A hole was drilled in a similar limestone bench under the same conditions and similarly filled with the 4Ili agent slurry. Next? 1
``The water-absorbing container shown in Figure 6 (1) (diameter of large diameter 65 mm)
mm, diameter of the large diameter part 11 cm, diameter 10 cvn, diameter of the small diameter part 3
0wn.

Place the same amount of 1j ash as above in the small diameter part (height 47 cm), absorb enough water, and then insert it so that it touches and covers the top of the S-My 1-slurry. lko. With this method of the present invention, cracks appeared between the holes in about 30 minutes (3L), and TiTF confirmed that even under low temperature conditions, the crushing time could be significantly shortened by using the method of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a sectional view for explaining the conventional construction method, Figs. 2 to 4 are first views for explaining the present invention in detail, and Figs. ) is a diagram for explaining the first embodiment, FIG. 6(a). (1)>, (C) is a diagram for explaining Example 2. 1... - object to be crushed, 2... hole, 3...
...Break 1i'1' agent slurry, 5...Heating source, 5a...Protrusion (t from the protruding surface of a part of the contact surface)
1M part). Applicant Sumitomo Cemen 1 - Co., Ltd. Figure 1 1 21) N 1 Figure 3 36゜Figure 41 + b) Return [F] Written amendment of ambiguous procedure (voluntary) 59, 'ig727 Director of the Japan Patent Office, February 1, 1939 1. Display of the case 11 Patent Application No. 8141 of 059 2. Name of the invention Crushing method using expansive crushing agent 3. Person making the amendment Patent applicant Sumitomo Cement Co., Ltd. 4. Attorney's specification " Claims” and “Detailed Description of the Invention J
Each column. 6. Contents of amendment (1) The "Claims" of the specification will be amended as shown in the attached sheet. (2) On page 7, line 1.5' of the specification, the phrase ``Calcium oxide-aluminate,'' is amended to ``R is missing calcium oxide, aluminate, and calcined dolomite.'' do. Claims (1) A mixture of an expandable crushing agent and water is filled into the inside of a hole formed in the material to be crushed (and then a heating source is charged into the hole from the opening side). A crushing method in which the heat source and the mixture are brought into contact with each other, characterized in that at least a part of the contact surface of the heat source with the mixture is a protruding surface that protrudes toward the inside of the mixture. A crushing method using an expansive crushing agent. (2) The heat source is at least one type of exothermic substance such as calcium oxide, an aluminate compound, calcined dolomite, and other compounds that generate heat due to hydration reaction. The crushing method according to item 1, item (a) of claim 1, which is a heating source that utilizes the heat exerted by the reaction between the above and water. The crushing method according to claim 1 JJI, wherein the exothermic substance is housed inside a container having a container.

Claims (1)

[Scope of Claims] 1) Fill the inside of a hole drilled in the object to be crushed with an IL1 compound of an expandable crushing agent and water, and then fill the inside of the hole with 1
- For a crushing method in which a heating source is filled from the 1st part side and the heating source and the mixture are brought into contact, at least a part of the contact surface of the heating source with the mixture is Using an expanding crushing agent, which is characterized by a protruding surface that protrudes toward the inside, it is lit!!
l/+']-n left. 2) The above-mentioned heating J';: is heating using the heat of reaction between water and one or more of the exothermic substances such as calcium oxide, aluminate compounds, and other compounds that produce light heat due to the hydration reaction of (A). The crushing method according to claim 13n, which is the source of the claim. 3) The crushing method according to claim 11, wherein the heating source is housed in a container through which water can penetrate and which has thermal conductivity.