JPS60844A - Crushing method using static crushing medium - 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 for crushing rocks and concrete structures.

Conventionally, gunpowder and large-sized (6.1 mm) have been used for crushing and demolition work of bedrock, rocks, reinforced concrete, concrete structures, etc.
In order to do this, there was a demand for the development of an all-female crushing method that would produce less noise, vibration, dust, and flying stones. Was it then that lime-based inorganic compounds were developed? This is a static crushing method that uses the volumetric expansion phenomenon of the static crushing agent, which is the main ingredient, due to the reaction of water and soil to crush rocks and concrete particles.

To give an overview of this crushing method, this method involves drilling a hole in rock or concrete (4) as the object to be crushed, and forming a slurry inside the hole with a surface crushing agent (hereinafter referred to as crushing agent). In this method, the crushing agent containing water causes expansion τ due to the hydration reaction, exerts a force τ that pushes the pores τ, and gradually crushes the object τ. According to this construction method, crushing work can be carried out with almost no noise, dust, etc.

However, with this type of crushing method using crushing agents,
Expansion pressure is developed by the hydration reaction of calcium oxide, which is the main component of the crushing agent, and the rate of expansion pressure development varies significantly depending on the reaction temperature, that is, air temperature and rock temperature. 7. Therefore, in order to secure a predetermined crushing time in the conventional construction method, it is necessary to appropriately select one or more crushing materials depending on the season and adverse temperature conditions at the site and use them for construction.7. If C then 7
The complication of not having a JL is 5) one thing. First, when the temperature conditions are particularly severe, the crushing method is not suitable.For Ty, it is difficult to crush at extremely low temperatures because the crushing agent does not react sufficiently, and it is difficult to crush at extremely low temperatures. Problems such as eruption phenomenon occur due to excessive reaction rate. Furthermore, the conventional construction method has the disadvantage that it takes about half a day to one day to fill the crushing agent and crush it, making it unsuitable for use in construction with a short construction cycle. The present invention was made in view of the above circumstances, and it is difficult to predict the timing of completion of crushing at the work site. It is difficult to bear the influence of adverse temperatures (it can always exert stable crushing force, crush in a short time, and the crushing completion time can be predicted and the crushing completion time can be set arbitrarily) The purpose is to provide possible crushing methods.

Hereinafter, the non-invention will be explained in detail.

Among the crushing methods of the present invention, the first crushing method involves filling a static crushing agent into a hole drilled in the object to be crushed, and the volume expansion phenomenon of the static crushing agent causes the In the crushing method of crushing, the middle part of a heat medium flow pipe is buried in a static crushing agent filled inside the hole, and a heat medium is made to flow inside the heat medium flow 'a. Ail
In addition, the second crushing method involves bringing the static crushing agent into thermal contact with the static crushing agent and adjusting the temperature of the static crushing agent. In the 5th crushing method, the middle part of the heat medium flow pipe is buried in the static crushing agent filled inside the IfiI tag, and The open part is sealed with tamping material, and if necessary, the middle part of the tamping material flow pipe is buried in the tamping phase, and heat is applied to the inside of the heat medium flow pipe and the tamping material flow pipe.゛Let the medium flow, and the heat medium and the static 1! ] It is characterized by thermally contacting the crushing agent and the tamping material, and controlling the temperature of the static crushing agent and, if necessary, the MI tamping material.

First, the first crushing method will be explained in detail. In this method, a heat medium flow pipe is used to guide a heat medium into a crushing agent filled in a hole for crushing. As this flow pipe, metal pipes such as copper pipes and iron pipes, synthetic resin pipes such as vinyl chloride pipes, paper pipes 7, etc. can be used. Among these, in order to improve the efficiency of heat transfer between the heat medium and the slurry-like crushing agent, copper pipes with high thermal conductivity are suitable; When using the construction method τ in which the material is disposed of along with the crushing agent after use, paper vibrators are advantageous in terms of cost.

The shape of the flow pipe is limited by the shape of the hole drilled in the object to be crushed, and preferably has a shape that can provide as uniform temperature distribution as possible throughout the crushing agent filled inside the hole.

To install this flow tube, 1. Normally, a flow tube is inserted into the crushing hole in advance, and the crushing agent is poured into the hole in the form of a slurry. Although the method of burying the pipe in a crushing agent is difficult, if a strong material such as a metal pipe is used as the flow pipe, fill the inside of the hole with a crushing agent. It is also possible to insert it into a crush-saving agent.

In addition, various fluids can be used as the heat medium used in this crushing method, but English soil is easy to handle and treat, and water (hot water, city water, steam), Air is preferred. This heat medium is selected depending on the state of the UIL used and the desired temperature, and is adjusted to a desired temperature by a temperature control means, and then sent to the above-mentioned distribution center.

Next, a method for adjusting the temperature of the crushing agent used in the non-crushing construction method will be explained.

Usually, a crushing agent has an appropriate temperature range (hereinafter abbreviated as set temperature) set according to the blending ratio of its components. In the crushing method of the present invention.

It is preferable to adjust the temperature so that the crushing agent τ is near the upper limit of the usable temperature range. This is because by keeping the temperature of the crushing agent slurry as high as possible within the range of 7L in which the jetting phenomenon occurs, it is advantageous in that the hydration reaction rate of the crushing agent can be accelerated and crushing can be carried out in a short time.

Therefore, when adjusting the temperature, if the environmental temperature at the work site is lower than the upper limit of the set temperature of the crushing agent used, hot water or high-temperature steam can be used as the heat medium. ! The crushing agent is supplied with heat to keep it at a relatively high temperature. On the other hand, if the prefectural border temperature is higher than the set temperature of the crushing agent, use cold water or low-temperature air as the heat medium.
Distribute the crushing agent through the distribution pipe, remove the heat from the crushing agent, and remove the crushing agent.
It is cooled to a temperature that does not cause the al' eruption phenomenon.

According to the Mx crushing method described above, the temperature of the crushing agent can be adjusted as desired while the crushing agent is filled in the hole for crushing the object, so the environmental temperature of one work site can be adjusted. A crushing method that can exert a good crushing force jal' without being influenced by this becomes possible.

In addition, the static crushing method can be applied even in environments with low or low temperatures, where crushing agents could not be used in the past. Since the temperature of the manifold and crushing agent can be kept as high as possible within the range that does not cause the eruption phenomenon, the expansion pressure is developed in a short time, and the crushing in a short time becomes i]. 01 Dragon can be constructed using a smaller amount of crushing agent than before. Furthermore, while conventionally a wide range of working environment temperatures had to be dealt with using multiple types of crushing agents, each with a different set temperature, it is now possible to adjust the temperature of the crushing agent during use. , it is possible to cope with various temperature conditions with a small number of types of crushing agents, and therefore, we aim to produce large quantities of crushing agents with a small number of types.
This provides advantages such as cost reduction.

To explain the second crushing method of the present invention in more detail, the second crushing method uses the same temperature control of the crushing agent as the first crushing method.

The opening of the hole filled with the crushing agent is sealed with a tamping material to prevent the expansion pressure generated by the crushing agent and the eruption phenomenon. Distribution of tamping materials'# How to adjust the temperature of tamping materials by burying them.

The tamping materials used in this second crushing method include portland cement, mixed cement, and ultra-fast hardening cement (
Examples include jet cement (trade name), alumina cement, quick setting, hard cement (for example, Q-stop, trade name; manufactured by Sumitomo Cement Co., Ltd.) 1 gypsum plaster. This tamping material is drilled into the object to be crushed, and does it contain a crushing agent inside the hole? After filling the tamping material and embedding the flow pipe 'al' in this crushing agent, it is used by filling the opening of the hole, and the hardening of this tamping material firmly seals the opening of the hole.

Further, a tamping material flow pipe is embedded in the tamping material as necessary. This tamping material distribution pipe is provided independently from the crushing agent distribution pipe described above,
The arrangement is such that the temperature regulation of the tamping material and the temperature regulation of the crushing agent can be carried out independently of each other.

The heat medium to be supplied to the tamping material flow pipe is as follows:
The same heat medium as the above-mentioned crushing agent can be used.

Next, an example of the temperature and pressure adjustment method in the second crushing method, (
5) When the temperature of all tamping materials is not adjusted,
This will be explained separately for the case where 181 steps are performed. In any of the following examples, the basic principle is to first harden the tamping material to seal the hole opening, and then adjust so that the expansion pressure of the crushing agent is developed.

IAI First, we will explain the case where a flow pipe for tamping material is not provided and therefore the temperature tAm of the tamping material is not measured. When the rsH has hardened and has sufficient strength, warm water or the like is passed through the flow pipe to raise the temperature of the crushing agent and promote the hydration reaction. At this time, since the crushing agent is confined inside the hole by the tamping material, it is possible to prevent the blowout phenomenon even if the crushing agent is set slightly higher than the upper limit of its installation temperature σ2. UJ's ability is to develop crushing force and improve crushing force.

■ If the prefectural border temperature is higher than the set temperature of the crushing agent, first place a flow pipe inside the crushing hole, and with a low-temperature heat medium such as cold water flowing through this flow pipe, turn off the crushing agent. It is desirable to perform filling to suppress the water ion reaction of the crushing agent. After filling with the crushing agent, the hole opening is closed with tamping material. In this case, the ambient temperature is normal and the tamping material hardens quickly, reaching a sufficient degree in a short time. After that, it is decided to raise the temperature of the crushing agent, and ■ distribution of low temperature heat medium to the distribution pipe'? : Stop and use the heat of the material to be crushed to warm the crushing agent, ■ Increase the temperature of the heat medium supplied to distribution/a to warm the mouth of the crushing agent Y, etc. The temperature of the crushing agent is set to a temperature as high as possible without causing an eruption phenomenon, thereby promoting the hydration reaction of the crushing agent. In this case as well, the ejection phenomenon is prevented by the sealing effect of the tamping material, and expansion pressure is developed in a short time to obtain crushing force. ◇ Do not adjust the temperature of the tamping material as described above. The crushing method is particularly advantageous in that it is applied in high-temperature environments and hardening is accelerated by the pressure heat that the tamping material receives from the tamping material in certain cases.

tB) A case in which the temperatures of the crushing agent and the tamping material are individually controlled will be briefly described.

(2) If the environmental temperature is lower than the set temperature of the crushing agent used, the filled tamping material is first heated with a heating medium at a still temperature such as hot water or steam to accelerate hardening. After the tamping material has developed sufficient strength, it is warmed to a predetermined temperature using a crushing agent and a high-temperature heat medium such as hot water to promote the hydration reaction. In this case, the tamping material and the crushing agent can exhibit their respective performance in a short period of time despite the low environmental temperature.

■ If the ambient temperature is higher than the set temperature of the crushing agent, fill the tamping material while keeping the crushing agent at a low temperature by flowing cold water or the like through the flow pipe for the crushing agent. Also in this case,
First, the tamping material is heated to promote its hardening, and then the crushing agent is heated to develop expansion pressure.

As described above, there is a crushing method in which the temperatures of the IL crushing agent and the tamping material are adjusted independently.

The second crushing method is particularly effective in that it can be applied to construction under low-temperature environmental conditions to significantly shorten the construction period.
Similar to the crushing method of 7. It is possible to handle the problem with a small number of types of crushing agents. C. We have three advantages, such as being able to reduce costs by mass producing a small number of products, and seal the crushing agent inside the hole with the tamping material, first give the tamping material sufficient sealing strength, and then crush it. To adjust the temperature to develop the expansion pressure of the agent.

By adjusting the temperature of the crushing agent to a higher temperature than in the first method, the blowout phenomenon can be prevented. Therefore, the time required for crushing can be drastically shortened, and the crushing time can also be reduced. The cape of Sekido becomes tlIJ Noh. In addition, it becomes possible to apply the present invention to construction work with a short construction cycle and to facilitate construction planning.

The present invention will now be explained in more detail by way of examples.

[Example 1; 1st crushing method] As shown in Fig. 1, a hole 2 with a diameter of 55 mm and a diameter of 49 Ccm was drilled in a cubic ta concrete specimen L with a side of 1 m. I left it in a flooded greenhouse for a day to stabilize the temperature. Subsequently, inside the thermostatic chamber, a PVC resin pipe ff with a diameter of 1 ginm was placed inside the hole 2.
Three U-shaped flow pipes were arranged, a slurry with a water ratio of 22 cm was prepared, and a constant crushing agent (8--Mite Vl!jl;
Manufactured by Sumitomo Cement Co., Ltd. *Temperature application reliability of crushed bodies 1
．． 0'c or less) S was filled up to the mouth of hole 2. After filling,
The time required to reach crushing was measured for a case in which hot water at a temperature of 50°C was passed through the flow pipe 3 and a case in which hot water at a temperature at 40'C was passed through the flow pipe 3. For comparison purposes, the crushing time was also measured when hot water was not supplied.

The results are shown in Figure 2 as a graph showing the relationship between heat medium temperature and crushing time.

As is clear from the results shown in FIG. 2, it can be seen that the crushing time can be significantly shortened by controlling the temperature of the crushing agent.

[I/iIg-li 2; Crushing method for drain 2] Using the same concrete specimen as in Example 1, in a thermostatic chamber at a temperature of 5.9 C°, the same circulation as in Example 1 was carried out as shown in Figure 3. pipe 3″
29 cm from the opening of the crushing agent slurry (same as in the example) with a water ratio of 22 cm, and then fill the tamping material (jet cement mortar ) filled with T. The compressive strength of the tamping material after 1 hour is approximately 50 kg f/
It reached a sufficient strength of c n12. Next, the case where ktAU of hot water with a temperature of 80°C is passed through the flow pipe 3, and the case where ktAU of hot water with a temperature of 80°C is passed through
The crushing time was measured and the width of the cracks that occurred was measured for the case where warm water at ℃ was circulated. Figure 8fJ4 shows the relationship between the crushing time and the crushing time. Figure 5 shows the relationship between the fissure width and the first system.

These results 1J) also show that by closing the opening of the hole σ with tamping material, the It was confirmed that the eruption phenomenon could be prevented and that crushing could be accomplished in an extremely short time using this method.

As shown in FIG. 5, when the crushing is carried out in a shorter time, a wider cracking sound is produced, and therefore a larger crushing force can be obtained when the expansion is performed in a shorter time.

[Execution I+113; Second crushing method] After filling the hole 2 with the crushing agent slurry 178 under the same conditions as in the example row 2, the spiral tamping material flow 1-width pipe 5 was inserted as shown in Fig. 46. In the buried state, Example 2 was removed and the tamping material T7 was optically filled. Simultaneously with filling, hot water at a temperature of 6 (10°C) was passed through the tamping material flow pipe 5 to promote the strength development of the tamping material, and after 15 minutes the compressive strength reached approximately 5 Q kgf/cm. In the meantime, hot water at a temperature of 8° 0C was passed through the flow pipe 3 to warm the crushing agent and keep it at a fixed point.

The concrete 'J' specimen was crushed 2 hours after filling.

We were able to significantly shorten the crushing time.

[Implementation 4; First crushing 1 round] Under the same conditions as in Actual IUfHJ], crushing agent slurry IJ-8 was filled as shown in Fig. 1, and the flow pipe 3 was heated to a temperature of 10
Heat the crushing agent through steam above 0°C.

As a result, the concrete specimen could be crushed in about 2 hours.

[Example 5; First crushing method] Using the same specimen 1 and flow pipe 3 as in the actual m-row 1 in a thermostatic chamber at a temperature of 40°C, a set temperature of 1 was set inside the hole 2.
8 feet of crushing agent slurry (water ratio 22 tons) at 0 to 30°C was filled. Next, changes in slurry temperature over time and crushing time were measured for cases in which cold water at a temperature of 5° C. was passed through the flow pipe 3 and cases in which it was not allowed to flow.

Change in slurry temperature over time? It is shown in FIG.

In the above measurements, the crushing agent that was not cooled was
As shown in Figure m7, an eruption phenomenon occurred approximately 2 hours and 10 minutes after filling. On the other hand, when the temperature was adjusted using cooling water, the slurry temperature was maintained at about 40°C, and the specimen could be crushed about 5 hours after the initial heating.

[Example 6; Second crushing method] A concrete IJ specimen l similar to that in Example 1 was given a diameter Iggm.
A hole l with a diameter of m and i of 80 cm was drilled, and the specimen was heated to a temperature of 1 f.
This specimen was placed in a constant temperature room kept at 5°C.
hole! As shown in FIG. 8, a spiral oit passage tube 6 made of vinyl chloride resin and whose diameter is gradually reduced from the base 13) to the tip is arranged inside the hole, and the example The same crushing agent slurry S as in 1 was filled, and the opening was sealed with tamping and material T.

When hot water at a temperature of 90° C. was passed through the flow pipe 6, the specimen 1 was crushed after one hour.

According to the above-mentioned flow path 6, since the contact area of the flow tube 6 R-r is wide as the tamping material unit decays, the tamping material is sufficiently heated and hardens rapidly, resulting in a large It is possible to develop crushing force.

In addition, in the above-mentioned flow pipe 6, the crushing force can be adjusted by selecting the #, the pitch of the spiral, the diameter, etc.

Adjustment of crushing time, etc. is circular.

[Example 7; Second crushing method] Specimen 1 similar to Example 6 was placed in a thermostatic chamber kept at a temperature of 35°C. Inside the hole 2' of this specimen λ', as shown in FIG. 6
Fill the crushing agent slurry 17-8 in the same manner as in step 1, and seal the opening with tamping material T. 0. Flow water at a temperature of 5°C through the flow pipe 7 for 10 minutes to lower the crushing agent to a low temperature. The tamping material was exposed to a high temperature atmosphere to harden it, and hot water at a temperature of 5.0°C was passed through the flow pipe 7.
According to the distribution f7 as above, which was crushed after 0 minutes,
It is possible to adequately control the temperature in the deep part of the specimen where it is difficult for heat to escape, and to achieve a uniform temperature distribution over the crushing agent plate, which can sufficiently improve the performance of the crushing agent.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a specimen for explaining the methods of Examples 1 and 4.5, FIG. 2 is a graph showing the relationship between heat medium temperature and crushing time obtained in Example 9111, and FIG. The figure is a cross-sectional view of the specimen of y) to explain the method of Example 2, Figure 4 is a graph showing the relationship between the heat medium temperature and crushing time obtained in Example 2, and Figure 5 is the example of Example 2. 2 is a graph showing the relationship between constant crushing time and crack width obtained in Example 2, FIG. 6 is a cross-sectional view of a specimen for explaining the method of Example 3, and FIG. A graph showing the change in slurry temperature over time; FIG. 8 is a cross-sectional view of a specimen for explaining the method of Example 6; and FIG. 9 is a prescribed IR specimen for explaining the method of Example 7. ' is the bjt plane view of '. 1... Specimen (to be crushed'v/J), 2... Hole, 3
, 6 , '7... Flow pipe, 5... Tamping; l:llJ Ill flow pipe, S... Crushing agent, T...
・Tamping material. Applicant Sumitomo Cement Closed Company Figure 6 Figure 7 Figure 8 Lifetime Figure 8 Figure 9

Claims (1)

[Scope of Claims] l) A crushing method in which a static H''J crushing agent is filled inside a hole drilled in a wL crushed object, and the object to be crushed is crushed by the volume expansion phenomenon of the static crushing agent. A middle portion of a heat medium flow pipe is buried in a static crushing agent filled in the inside of the hole, and a heat medium τ is caused to flow inside the radiant heat medium flow pipe to combine this heat medium and the static crushing agent. This static crushing agent is characterized by thermal contact and temperature control of the static crushing agent. In a crushing method in which a crushing agent τ is filled with light and the object to be crushed is crushed by the volume expansion phenomenon of this static crushing agent, the intermediate portion τ of the heat medium flow pipe is filled in the constant static crushing agent filled inside the hole. The opening of the hole is sealed with a tamping material, and the middle part of the tamping material flow pipe is buried in the tamping material according to the membership fee. Flowing a heat medium through the interior, bringing the heat medium into contact with the static crushing agent and the tamping material, and adjusting the temperature of the static crushing agent and, if necessary, the tamping material, step 1.c. Crushing method using a static crushing agent characterized by Kotoze 03) By failing to adjust the temperature of the static crushing agent and the tamping material, first adjust the temperature of the tamping material to harden τ of the tamping material. The static crushing agent according to claim 2 is characterized in that the temperature of the static crushing agent is adjusted by measuring and the temperature of the static crushing agent is controlled to prevent the expansion reaction of the static crushing agent. Crushing method.