JP2813550B2 - Repair tool structure of powder injection stirrer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The disclosed technology is to improve the arching of passages in rods of cement or slag of an injection stirrer for injecting a powder improving material such as cement or slag into the ground to improve the ground. belonging to the technical field of the structure of the tool for repair that.

[0002]

As [of the Related Art] of well-known, national land is large and narrow a mountainous Forest Service, moreover, in the Japan of the special terrain conditions that are in close proximity to the intricate long coastline farming livestock farming, of course, housing There are a limited number of plains that can be used for various industrial facilities, and for this reason, various technologies for improving and effectively using soft ground, such as shallow shores, rivers, and basins of lakes and marshes, have been devised and put to practical use since ancient times. Various improvements and development studies are now being conducted.

[0003] Among them, a chemical liquid injection method of injecting a chemical such as so-called water glass into the ground and solidifying it with time has been widely used. However, with the occurrence of pollution problems such as contamination of groundwater, A so-called powder which solidifies with time by mixing and stirring with the ground soil by agitating and impinging the powder , such as cement or slag, into the ground because it may lead to environmental destruction on a global scale Injection stirring method (so-called DJM method, etc.)
Have been researched and developed, and are being actively used in practical use.

Various types of powder injection and agitation devices such as cement and slag are currently in use. For example, as shown in FIG. A rod 4 is supported and inserted into a predetermined ground 1 to be improved through a bearing 3 with respect to the guide 2 provided, and a lower stirring blade 5 ′ of a stirring blade 5 provided at a tip end thereof.
In the process of excavating downward from the powder injection port 8 provided at the base of the above, cement or slag (not shown) is injected into the ground, and is agitated and mixed with the excavated soil by the agitating blades 5 ′. Stirrer blade 5 ″
A cement or slag or the like is similarly ejected from a powder injection port provided at a base (not shown) to mix and agitate the excavated soil with soil, and a process of solidifying with time is repeated.

Of course, depending on the design, cement or slag is injected only from the powder injection port 8 of the lower stirring blade 5 'only during downward excavation, or the upper stirring blade 5 is used in the lifting process. There is also an embodiment in which cement, slag, or the like is injected from the injection port of "".

[0006]

By the way, such a DJ
In the ground improvement by powder injection and agitation by the M method, etc., the powder of the improved material is transported to the outer pipe 6 of the double pipe system of the rod 4 through a powder passage in the inner pipe 7 by air or the like. , And is ejected from the powder injection port 8, so that arching of powder such as cement and slag is formed around the powder injection port 8 near the base of the stirring blade 5. Solidification
Phenomenon occurs, and the stirring blades during lifting and lowering
From 5 of the base powder injection port 8 clogging phenomenon occurs at the site easier (in reality often occurs), therefore, in the construction of repeating, of the powder in the injection port 8 at the base of the stirring拌翼5 Repairing for arching occupies an extremely large number of man-hours, which has been a bottleneck in construction, and there has been a drawback that the powder injection stirrer occupies more than 30% of the maintenance cost.

In particular, when the arching is severe, the stirrer must be disassembled from the rod and repaired. Therefore, repairing the bearing box, shaft hole, bolt hole and the like for the stirrer blade rod is extremely costly. In addition, the powder injection stirrer must be put into non-operational state during this time, which significantly reduces the operation efficiency and lengthens the construction period.
Had also become a bottleneck that Do that.

[0008] This occupies a large weight not only in a single-shaft device but also in a two-shaft continuous type device, and is a disadvantage that cannot be ignored in terms of cost.

To cope with this, it is conceivable that the arching is repaired or destroyed by an air jet for a predetermined period. However, if the arching progresses, the driving pressure of the air jet must be increased. And air jet
Also of the nozzle portion by dynamic wear occurs, replacement repair etc. worn nozzles had neck that has also become possible to increase the above-described disadvantages.

[0010]

The object of the invention of this application is that the merits of the powder injection agitation method such as the DJM method, which is superior to the ground improvement by the chemical solution as described above and is superior in the problem of pollution and environmental harmony, based on the above-mentioned prior art, are realized. The technical problem to be solved is to solve the problems of the powder injection port of the stirring blade and the arching of the powder transport passage, which lower the work efficiency in operation , and the powder supply of the inner tube of the rod used for powder injection stirring Keru at the passage, also,
While maintaining arching at the jet port as an inevitable physical phenomenon, its maintenance is extremely easy and at low cost, and simple repair tools can be used without lowering the operating efficiency of the powder jet agitator. It is an object of the present invention to provide an excellent repair tool structure of a powder injection agitator which can cope with arching each time of construction and which is useful in the field of civil engineering construction technology in the construction industry.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the construction of the invention of the present application, which has the above-mentioned object and the gist of the present invention, is to improve the ground by a predetermined powder injection and stirring device. upon performing the process Toe transmural enter the rod of the powder injector stirrer in ground, cement and slag from the powder injection port provided at the base of the stirring拌翼while excavating the ground by the stirring blades of the front portion stirring the ground soil by injecting modifying material <br/> given powder is Oite the descending drilling etc., or over time by mixing and stirring the stirred ground soil and a predetermined powder in withdrawal process In the process of solidifying and performing a predetermined ground improvement, as described above, arcing occurs in the powder injection port and the powder transport passage provided near the base of each stirring blade, and in order to eliminate the arching, powder injection is performed. Lift the stirrer to the ground Was by inserting a brush body or the like as a cutting body provided in a spiral shape or the like <br/> tip of a flexible joint that extends from an output shaft of the simple drive source such as an electric tool in step rotation of the drive source In this way, the cutting body is crushed and removed to remove the arching of the powder in the powder passage of the rod. In some cases, further crushing of the arching is sought via an air jet. achieving a smooth powder passage of the powder passage of the rod of the stirring device, perform as designed the passage of the powder base in the in the powder injection port of the stirring blade, the powder injection stirrer is efficiently, operation so as to be repair tool whose structure is simple, maintenance, inspection, and maintenance such as is almost unnecessary, in which took technical means durability was as good.

[0012]

Next, an embodiment of the invention of this application will be described with reference to FIGS.
This will be described below.

[0013] Figure 1, in the embodiment shown in FIG. 2, 9 is a repair tool powder injection stirrer central to the subject matter of the invention of this application, with a trigger 11 on the grip 10 of the proximal portion A simple power tool body 12 is connected to its output shaft through a fixed flexible joint 13 through a connector 14.
The wire 15 is extended rotatably by the
A predetermined number of disk-shaped cutting bodies 16, 16... Are integrally provided.

In the above configuration, as shown in FIG. 2, a predetermined powder such as cement or slag is provided in the transport passage between the lower and upper stirring blades 5 ', 5 "provided on the rod 4 of the powder injection and stirring device. When the powder injection stirrer is lifted to the ground when the arching 17 is formed, the cutting body 16 of the repair tool 9 is removed from the powder injection port 8 of the lower stirring blade 5 ′ by the flexible wire 15. As shown in FIG. 2, the operator inserts the power tool 12 through the trigger 11
Is operated, the cutting body 16 is rotated through the flexible joint 13, the connector 14, and the wire 15 in a predetermined manner, and the arching 17 in the rod 4 is cut and removed in a predetermined manner.

Of course, the arching 17 that has been cut and removed is appropriately discharged from the powder injection port 8 of the lower stirring blade 5 ′, and an air jet having a predetermined pressure is supplied from the ground to the powder passage of the rod 4. Arching 1
7 is efficiently removed from the powder injection port 8 of the lower stirring blade 5 '.

Next, in the embodiment shown in FIG. 3, the cutting body 16 ′ provided at the tip of the wire 15 is formed in a spiral shape.
When the rotational force is transmitted to 6 ′, the arching 17 is forcibly directed to the powder injection port 8 of the lower stirring blade 5 ′, thereby ensuring the operation.
It is obtained so as to be discharged.

Next, in the embodiment shown in FIG. 4, the cutting body provided at the tip of the wire 15 is a spiral type brush body 1.
6 ", which is not substantially different from the above embodiments.

It should be noted that the embodiments of the invention of this application are not limited to the above-described embodiments. For example, a suction duct is provided in a flexible joint to forcibly remove the cut and removed arching by suction. Various modes can be adopted.

In terms of design change, for a simple drive source, a manual rotary device may be provided in addition to the power tool.
Is also possible.

[0020]

As described above, according to the invention of this application, there is an excellent advantage that it can be basically used in the method of spraying and stirring powder of cement or slag instead of the conventional method of injecting a chemical solution, which leads to pollution problems and environmental destruction problems. In the apparatus, arching which is inevitably formed over time in a powder injection port provided below the agitating blade at the tip end can be cut and removed at each application by a simple repair tool. Clogging does not occur due to arching of the powder injection port provided at the base of the nozzle and the transport passage near it, and replacement of the stirring blades and removal of arching of the injection port powder passage in the rod by air jet etc. An excellent effect is obtained that it can be obtained without a complicated procedure.

Each time the powder injection and stirring device is operated,
Excellent effects such as easy removal of arching during the lifting process during construction, low maintenance cost, and improved operation efficiency are achieved.

Then, the stirring blade, especially the nozzle portion of the powder injection port of the upper stirring blade, is always kept in a normally operable state.
As a result, there is an excellent effect that the efficiency of construction is improved and the reliability is improved.

When the arching is cut and removed by the repair tool, the removal of the arching is more effectively promoted by using an air jet in an auxiliary manner.

Since the repair tool can be easily used by a field worker, the cost does not increase in terms of equipment, and no maintenance, inspection, maintenance, etc. is required. The present invention can be applied not only to the powder injection and stirring apparatus but also to a powder injection and stirring apparatus in a double- shaft continuous mode , and it is possible to cope with the use of a plurality of units.

[Brief description of the drawings]

FIG. 1 is an overall schematic side view of an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of an application mode to a powder injection and stirring apparatus.

FIG. 3 is a schematic side view of another embodiment.

FIG. 4 is a schematic side view of another embodiment.

FIG. 5 is a schematic partial cross-sectional side view of the DJM method.

[Explanation of symbols]

 5 ', 5 "stirring blade 8 powder injection port 4 rod 9 repair tool 13 flexible joint 12 simple drive source 16 cutting body 16', 16" brush body

Claims (4)

(57) [Claims] 1. A powder clogging repair tool for a powder injection port of a stirring blade of a powder injection stirrer and a powder passage in a rod communicating with the powder injection port, extending from an output shaft of a simple drive source. A cutting tool for a powder injection stirrer, characterized in that a cutting body for powder arching is integrally attached to a tip of a flexible joint to be formed. 2. A repair tool structure for a powder injection stirrer according to claim 1, wherein said cutting body is movable forward and backward. 3. The repair tool structure according to claim 1, wherein said cutting body is formed by a brush body. 4. The repair tool structure according to claim 2, wherein said brush body is formed in a spiral shape.