JP4097005B2 - Cement hardener injection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to Note inserting apparatus cementitious hardener.
[0002]
[Problems to be solved by the invention]
In conventional cement milk injection methods, rocks such as soft rock that allow water to pass through but do not allow cement particles to pass through may become clogged rapidly when the flow rate decreases. This is because the cement particles in the cement milk settle in the injection path and open the path due to the decrease in the flow rate.
[0003]
OBJECT OF THE INVENTION
The present invention has been made in order to solve the above-described problems, and is a cement system that can satisfactorily inject cement milk even in rocks such as soft rock that allow water to pass but difficult to pass cement particles. and to provide a note inserting apparatus of the cured material.
[0004]
[Means for Solving the Problems]
As means for solving the above-mentioned problems, the present invention provides a cement-based hardener injection device, which is installed in the middle of a pipe between a grout pump and an injection nozzle, and gives pulsation to the cement-type hardener in the pipe. The pulsation generator is flexible enough for the cement-based hardener to pass through the sealed oil chamber in the chamber. A passage is provided, and the striking force due to the reciprocating motion of the piston is transmitted to the flexible passage through the oil in the oil chamber, and the flexible passage is periodically compressed and expanded, so that the inside of the flexible passage Provided is a cement-based hardener injection device, characterized by being configured to give pulsation to a cement-based hardener.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
<I> Injection device The injection device of the present invention comprises the following components.
[0010]
(1) Structure of the entire apparatus As shown in FIG. 1, the cement and water are mixed by the agitator 1, pressurized by the grout pump 2, and injected from the injection nozzle 4 to the ground via the control device 3. . Further, in the present invention, a pulsation generating device 5 is provided between the grout pump 2 and the injection nozzle 4 to periodically pressurize a cement-based hardener such as cement milk to give pulsation.
[0011]
(2) Pulsation generator As shown in FIG. 2, the pulsation generator 5 is provided with a flexible passage 53 through which a cement-based hardener passes in a sealed oil chamber 52 in a chamber 51, and by reciprocating movement of a piston 54. The striking force is transmitted to the flexible passage 53 via the oil in the oil chamber 52, and the flexible passage 53 is periodically compressed and expanded to pulsate the cementitious hardened material in the flexible passage 53. Is configured to give.
[0012]
At both ends of the chamber 51, an inlet 55 and an outlet 56 of a cement-based hardener are provided in communication with both ends of the flexible passage 53 accommodated therein. The inlet 55 communicates with piping on the grout pump 2 side, and the outlet 56 communicates with piping on the injection nozzle 4 side.
[0013]
The flexible passage 53 only needs to have a structure that can transmit the striking force of the piston 54 to the cement-based hardened material that passes through the inside, but for example, a rubber pipe formed in a bellows shape can be considered.
[0014]
The piston 54 is slidably accommodated in a cylinder communicating with the oil chamber 52. A predetermined pulse generated by the control device 3 is converted into an air pulse by an electromagnetic valve, and the knocker 57 is hit. The striking force of the knocker 57 is transmitted to the piston 54, and the piston 54 slides. The reciprocating motion of the piston 54 employs a frequency of about 100 times per minute, for example. As the mechanism for sliding the piston 54, other known mechanisms can be used.
[0015]
<B> Injecting method In conventional cement milk injecting methods, rocks that allow water to pass through but do not allow cement particles to pass through, such as soft rocks, may become clogged rapidly when the flow rate decreases. This is because the cement particles in the cement milk settle in the injection path and open the path due to the decrease in the flow rate.
[0016]
Therefore, in the present invention, using the injection device configured as described above, the pulsation generating device 5 is operated to inject while pulsating cement milk. When the pulsation is given to the cement milk, the cement particles to be settled can be forcibly excited. This pulsation is transmitted from the injection nozzle 4 at the tip to the inside of the rock. Therefore, the blockage which arises in the injection | pouring path | route in a rock mass can be prevented.
[0017]
<C> Experimental Results FIG. 3 shows the accumulated outflow amount of the cementitious hardener when injected without giving pulsation. FIG. 4 shows the accumulated outflow amount when injecting while giving pulsation. As is apparent from these graphs, it can be seen that when the pulsation is applied, the accumulated outflow amount is larger and the blockage of the injection path is smaller.
[0018]
FIG. 5 shows the outflow rate of the cementitious hardener when injected without pulsation. FIG. 6 shows the outflow rate when injecting while giving pulsation. As is apparent from these graphs, it is understood that the flow rate is faster when pulsation is applied, and this also indicates that the blockage of the injection path is small.
[0019]
Second Embodiment of the Invention
As another structure of the injection device, instead of the pulsation generating device 5 described above, a vibration device that applies vibration to the pipe between the grout pump 2 and the injection nozzle 4 and pulsates the cement-based hardened material in the pipe. Can be considered. As the vibration device, for example, a vibration table on which piping can be mounted is considered.
[0020]
【The invention's effect】
Since the present invention has been described above, the following effects can be obtained. <A> When the pulsation generator or the vibration generator is operated when the injection amount decreases during the injection, the injection amount is recovered. As a result, a good injection amount can be continuously maintained for a long time.
[0021]
<B> Not only when the injection amount is reduced, but by continuously giving pulsation, a better injection effect can be expected.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a method for injecting a cement-based hardener according to the present invention. FIG. 2 is an explanatory diagram of a pulsation generator according to the present invention. FIG. 3 is an integrated outflow of cement-based hardener when injected without pulsation. Explanatory diagram showing the amount [Fig. 4] Explanatory diagram showing the cumulative outflow amount of the cement-based hardener when injected with pulsation. [Fig.5] The outflow rate of the cement-based hardener when injected without pulsation. Explanatory diagram showing FIG. 6 Explanatory diagram showing the outflow rate of the hardened cementitious material when injected while giving pulsation

Claims (1)

In the cement hardener injection device,
It is installed in the middle of the pipe between the grout pump and the injection nozzle, and comprises a pulsation generator that pulsates the cementitious hardener in the pipe ,
The pulsation generator is
Providing a flexible passage through which the cement-based hardener passes in a sealed oil chamber in the chamber;
By transmitting the striking force due to the reciprocating motion of the piston to the flexible passage through the oil in the oil chamber, and periodically compressing and expanding the flexible passage,
It is configured to give pulsation to the cementitious hardener in the flexible passage,
Cement hardener injection device.

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