JP2005016225A - Pressing type simplified freezer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressing type simplified freezer capable of stopping spring water in a short time by rapidly coping with the spring water welling out abruptly. <P>SOLUTION: This pressing type simplified freezer used by being pressed to a spring water part A of the natural ground comprises an abutting part 2 abutting on the spring water part A of the natural ground, and a cooling part 3 for cooling the abutting part 2. A cut-off frame 4 is formed in a circumferentially continuous manner around the abutting part 2. A cooling pipe 8 for circulating brine is built in the cooling part 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of the present application is, for example, a push-type simple freezing device (hereinafter referred to as “this device”) that can quickly cope with unforeseen springs at the time of removal of a segment associated with the expansion and expansion of a shield tunnel or mirroring for starting a shield In addition, it is also possible to quickly cope with unforeseen springs in ordinary grounds, ground improvement (injection) grounds, underground walls, etc.
[0002]
[Prior art]
In excavation work such as tunnels and slopes, springs may suddenly occur on the face and walls. A large amount of spring water will cause problems such as collapse of the face, poor adhesion of shotcrete, poor fixing of rock bolts, and reduced work efficiency. Is desired.
[0003]
Conventionally, as a countermeasure against this type of spring water, an injection method is generally known in which a chemical solution such as cement milk or sodium silicate is solidified in the ground to reduce the amount of spring water by reducing the water permeability of the natural ground.
[0004]
[Patent Document 1]
Japanese Patent Publication No. 6-102955 [Patent Document 2]
Japanese Patent Publication No. 7-76507 [Patent Document 3]
Japanese Examined Patent Publication No. 7-81486 [0005]
[Problems to be solved by the invention]
However, the injection method is very good as a permanent water stoppage measure. However, it is necessary to perform several borings in the ground and inject the chemical into each boring hole, and it is injected into the boring hole. Since it takes a considerable amount of time for the chemical solution to solidify in the ground and exert its water-stopping effect, there is a problem that it is difficult to quickly cope with suddenly generated spring water. There was also a problem from the viewpoint of economy and certainty.
[0006]
The present invention has been made to solve the above problems, and can quickly cope with a suddenly generated spring during excavation of a tunnel or a slope, and can stop the spring in a short time. An object of the present invention is to provide a push-type simple freezing device that can be used.
[0007]
[Means for Solving the Problems]
The pressing type simple freezing device according to claim 1 is a pressing type simple freezing device that is used by pressing against a natural ground, and includes a contact portion that contacts the natural ground and a cooling portion that cools the contacting portion. Thus, a water stop frame is continuously formed around the contact portion in the circumferential direction, and a cooling pipe for circulating the refrigerant is built in the cooling portion.
[0008]
The pressing-type simple freezing device according to claim 2 is a pressing-type simple freezing device that is used by pressing against a natural ground, and includes a contact portion that contacts the natural ground and a cooling portion that cools the contact portion. Therefore, a water stop frame is continuously formed in the circumferential direction around the contact portion.
[0009]
According to the first and second aspects of the present invention, the contact portion of the present device is pressed against the spring water place for several hours to temporarily block the flow of the spring water, and the cooling portion is cooled to stop the water. It was made possible to temporarily stop the spring water by freezing the spring water blocked by the frame and surrounding ground.
[0010]
In this case, in particular, the abutting portion is preferably formed of a light metal having good thermal conductivity. In addition, the water-stop frame is made of a material that can securely block the spring water by tightly adhering to the uneven ground, and can maintain the original softness even at low temperatures, such as silicone rubber. Desirable (thickness of about 1 to 2 cm, and one that retains the original softness to a low temperature of about -90 ° is preferable).
[0011]
In particular, the invention described in claim 1 is a brine system (indirect cooling system) in which a coolant (an antifreeze liquid such as calcium chloride or a low-temperature liquefied gas) is circulated through a cooling pipe to indirectly cool the contact portion. In this case, the cooling pipe may be built in the cooling unit in a single layer or a plurality of layers (double).
[0012]
The invention according to claim 2 is a low temperature liquefied gas method (direct cooling method) in which the cooling part is a refrigerant injection chamber, and the abutting part is directly cooled by directly injecting the low temperature liquefied gas into the cooling part. In this case, as the low-temperature liquefied gas, for example, liquid nitrogen (LN ₂ ), liquid oxygen, liquid air, liquefied petroleum gas, liquid hydrogen, liquefied natural gas, or the like can be used. Vaporizes and is released into the atmosphere.
[0013]
In the case of the invention described in claim 2, since it is a direct cooling system, a cooling pipe is unnecessary, and therefore, an extremely simple structure can be obtained.
[0014]
The pushing type simple freezing device according to claim 3 is the pushing type simple freezing device according to claim 1 or 2, characterized in that a large number of sword mountains are projected from the abutting portion. In particular, the invention of the present application provides a cooling capacity by increasing as much as possible the contact area between the abutting part and the spring water and the natural ground blocked by the water stop frame by projecting a large number of sword mountains at the abutting part. Can be significantly increased.
[0015]
A pressing type simple freezing device according to a fourth aspect is the pressing type simple freezing device according to the first or second aspect, wherein a large number of irregularities are formed in the contact portion. The invention of the present application also has a cooling capacity by increasing the contact area between the abutting part and the spring water and the natural ground as much as possible by forming a large number of irregularities in the abutting part. Can be significantly increased.
[0016]
As a method for increasing the contact area of the abutting portion, a metal brush is projected over the entire surface of the abutting portion, or a metal fiber or a polymer water-absorbing material (water retaining material) is laid in a mat shape. It is also possible to do it.
[0017]
The pressing type simple freezing device according to claim 5 is the pressing type simple freezing device according to any one of claims 1 to 4, wherein a drainage hole with a valve is formed in the contact portion. It is what.
[0018]
If the abutment part of this device is simply pressed against the spring location to stop the spring water, the water pressure of the spring water blocked by the water stop frame becomes very high, making the work difficult. Workability is remarkably improved by providing a drain hole to remove the spring water that is the source of high pressure.
[0019]
In addition, as a method of pressing the contact portion of this device against the spring water place, it is attached as an attachment to a heavy machine such as a backhoe, a method using a heavy machine, a method using a hydraulic jack, a method using a support made of steel, etc. In the case of a very small amount of spring, it can be directly pressed by hand.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
1 (a) and 1 (b) show an example of a pressing type simple freezing device. In the figure, this device 1 includes a contact portion 2 and a contact portion 2 that are pressed against a spring spring A in a natural ground. The cooling unit 3 that cools the unit is integrally formed in a rectangular parallelepiped shape that can be handled by human power.
[0021]
A water-stop frame 4 is continuously formed in the peripheral direction of the contact portion 2 in the circumferential direction of the contact portion 2, and a sword mountain 5 is provided on the inner side of the water-stop frame 4 over a substantially entire length of the contact portion 2. It is protruding. The tip of the sword mountain 5 protrudes to the outside of the water stop frame 4.
[0022]
In addition, drain holes 6 that pass through the rear of the cooling unit 3 are formed in the abutting part 2 at almost equal intervals over the entire surface of the abutting part 2, and valves 7 are respectively attached to the drain holes 6.
[0023]
On the other hand, the cooling unit 3 has a built-in cooling pipe 8 for circulating the brine, and both ends 8a and 8b are drawn out rearward as a brine supply port and a recovery port, respectively.
[0024]
In such a configuration, for example, as shown in FIGS. 5 (a) and 5 (b), the contact portion 2 of the present apparatus 1 is strongly pressed against the spring water place A of the natural mountain for several hours to block the spring water, At the same time, by circulating the brine through the cooling pipe 8, the abutting portion 2 is cooled by the cooling portion 3, whereby the spring water in the still water frame 4 and the spring water place A of the natural mountain are frozen over a certain circumference, The water stops.
[0025]
2, 3 and 4 all show a modification of the present apparatus. In the example of FIGS. 2 (a) and 2 (b), the concavo-convex portion 9 is substantially uniform over the substantially entire surface of the contact portion 2. FIG. In the example of FIGS. 3A and 3B, a brush 10 made of a metal wire material having good conductivity is provided on the abutting portion 2 over almost the entire surface thereof. Further, FIGS. In the example of (b), the metal fiber material 11 with good conductivity is spread on the abutting portion 2 over almost the entire surface in a mat shape, and in each example, the spring water blocked by the waterstop frame 4 and By increasing the contact area between the natural ground and the contact portion 2 as much as possible, the cooling capacity can be remarkably increased.
[0026]
FIGS. 6 (a) and 6 (b) show a water stop method for stopping springs in a part of unfrozen springs or melted springs, in particular, frozen soil by this apparatus.
[0027]
More specifically, the device 1 is pressed against a spring water source (spring part) A in the natural mountain to temporarily block the spring water (groundwater), and at the same time, circulating brine through the cooling pipe 8 By freezing, the device 1 and the spring water (natural ground) are integrated. In this case, when the area of the spring is very large, a plurality of the devices 1 are installed adjacent to each other as shown in FIG.
[0028]
When the amount of spring water is large, a release pipe 12 for releasing spring water is installed so that the spring water is released and the spring pressure is not increased until the contact portion 2 is frozen and integrated. At the same time, the spring pressure, water volume and temperature are measured and managed.
[0029]
Reference numeral 13 is a water stop valve for stopping the spring water, reference numeral 14 is a freeze prevention heater for preventing the release pipe 12 from freezing due to freezing of the spring water, and reference numeral 15 is an air vent pipe. It is.
[0030]
When the natural spring water source (spring water part) A is completely frozen and the freezing strength between the contact part 2 of this device 1 and the spring water part (natural ground) A is sufficiently secured, the release pipe 12 The water stop valve 13 is completely closed to stop the spring water. And the part of the water stop frame 4 is thawed and this apparatus 1 is removed.
[0031]
【The invention's effect】
The invention of the present application is as described above. The abutment portion of the present apparatus is pressed against the spring site for several hours to temporarily block the flow of the spring water, and the cooling portion is cooled to cool the abutment portion. By freezing the spring water blocked by the frame and surrounding ground, the spring water can be stopped reliably in a very short time.
[Brief description of the drawings]
FIG. 1 shows an example of a pressing type simple freezing device, in which (a) is a front view thereof and (b) is a longitudinal sectional view thereof.
2A and 2B show an example of a pressing type simple freezing device, in which FIG. 2A is a front view thereof and FIG. 2B is a longitudinal sectional view thereof.
FIGS. 3A and 3B show an example of a pressing type simple freezing device, in which FIG. 3A is a front view thereof and FIG. 3B is a longitudinal sectional view thereof.
4A and 4B show an example of a pressing type simple freezing device, in which FIG. 4A is a front view thereof, and FIG. 4B is a longitudinal sectional view thereof.
FIGS. 5A and 5B show a working method using a pressing type simple freezing device, in which FIG. 5A is a side view before pressing, and FIG.
FIGS. 6A and 6B show an example in which springs in an unfrozen spring part or a melted spring part are stopped by this apparatus, FIG. 6A is a cross-sectional view, and FIG. 6B is a plan view showing an arrangement example of this apparatus.
[Explanation of symbols]
1 This device (push-type simple freezing device)
2 Contact part 3 Cooling part 4 Water stop frame 5 Kenzan 6 Water drain hole 7 Valve 8 Cooling pipe 9 Concavity and convexity part 10 Brush 11 Metal fiber material 12 Release pipe 13 Water stop valve 14 Antifreeze heater 15 Air vent pipe A Spring water place

Claims (5)

This is a pressing type simple freezing device that is used by pressing against a natural ground, comprising a contact part that contacts the natural ground and a cooling part that cools the contact part, and a water stop frame is provided around the contact part. A pressing-type simple freezing apparatus, which is continuously formed in a circumferential direction and has a built-in cooling pipe for circulating a refrigerant in the cooling section. This is a pressing type simple freezing device that is used by pressing against a natural ground, comprising a contact part that contacts the natural ground and a cooling part that cools the contact part, and a water stop frame is provided around the contact part. A press-type simple freezing apparatus characterized by being formed continuously in the circumferential direction. The pushing type simple freezing apparatus according to claim 1 or 2, wherein a large number of sword mountains are projected from the abutting portion. 3. The pressing-type simple freezing apparatus according to claim 1, wherein a large number of irregularities are formed on the contact portion. The pushing type simple freezing apparatus according to any one of claims 1 to 4, wherein a drain hole with a valve is formed in the contact portion.

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