JP4012430B2 - High-pressure jet stirring method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a main nozzle and sub-nozzle formed on the high-pressure pipe of the multi-pipe by swinging the multi-pipe etc. at 30 degrees to 60 degrees, and compared with the conventional high-pressure jet stirring method. The present invention relates to an improvement of the high-pressure jet stirring method such as reducing the volume and greatly improving the economy.
[0002]
[Prior art]
As a conventional ground improvement method, it has been proposed that the shape of injection stirring is made rectangular or the like. This construction method can create a structure that fits the purpose without waste in the ground according to the shape of the plan. Therefore, it is possible to effectively use the underground soil from the ground by solidifying only the necessary dimensions. As processing technology, it is applied to soil retention / water retention, ground liquefaction countermeasures, soft ground improvement, etc.
[0003]
[Problems to be solved by the invention]
The present invention is a new method improved from the conventional high-pressure jet stirring method proposed as a ground improvement method. In the present invention, the nozzle formed in the multiple pipe is improved to oscillate (30 to 60 degrees in the present invention), and the like, thereby improving the economic effect and the like for greatly reducing the volume of the mud. For the purpose.
[Means for solving the problems]
As a means for solving the above-mentioned problems, the present invention provides a high-pressure jet agitation method in which a hardened material is injected to fix the ground in a predetermined range. 1 to 4 sub-nozzles are mounted, the two main nozzles 20 to 60 Mpa · 50 to 200 liters / min of the hardener, and the 1 to 4 sub nozzles 20 to 60 Mpa · 30 to 100 liters Spraying a curing material per minute, swinging the two main nozzles and the one to four sub-nozzles at 30 degrees to 60 degrees, and the air nozzle formed on the multiple tube from the curing nozzle A step of sending air at the same time as the injection of the nozzle and a step of pulling up the inter-multiple pipe, etc., and taking out the sludge generated by the swing of the main nozzle and the sub nozzle, etc. As a remote underground processing technology that effectively uses only the necessary dimensions of the underground soil from the ground by applying cutting and cutting, it can be applied to soil retention / water retention, ground liquefaction countermeasures, soft ground improvement, etc. I can do it.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is a new method improved from the conventional high pressure jet agitation method related to ground improvement. The main part of this improved new method is to inject a predetermined amount of hardened material from the main nozzle and sub nozzle formed in the high-pressure pipe of the multiple pipe inserted into the boring hole at an injection pressure and injection amount adapted to the soil. A step of swinging between 30 degrees and 60 degrees, a step of sending air from the air nozzle formed in the multi-pipe at the same time as the injection of the curing material, and the like.
[0006]
The present invention will be described with reference to the accompanying drawings.
The first embodiment is an embodiment having an oscillation angle of 60 degrees. FIG. 1 of the first embodiment is a schematic configuration diagram of the main part, FIG. 2 is an explanatory diagram of line AA in FIG. 1, and FIG. 1 is an explanatory diagram of line BB. 1 to 3, a drilled water pipe 12 is formed at the center of the multiple pipe 11, and high-pressure water pipes 13 and 13, a high-pressure water pipe are provided near the multiple pipe 11 and the drilled water pipe 12. 14 and air holes 15 are formed.
Two main nozzles 13A, 13A are formed in the high-pressure water pipes 13, 13, and one sub-nozzle 14A and air nozzle 14B are formed in the high-pressure water pipe 14.
The second embodiment is an embodiment having a swing angle of 45 degrees. FIG. 4 of the second embodiment shows an explanatory diagram of the main part, and the same parts as those in FIGS. Omitted. 4, the first embodiment is an embodiment having a swing angle of 60 degrees, FIG. 1 of the first embodiment is a schematic configuration diagram of the main part, and FIG. 2 is an explanatory diagram of the AA line of FIG. FIG. 3 is an explanatory diagram of line BB in FIG. In FIG. 4, high-pressure water pipes 13, 13, a high-pressure water pipe 14 and an air hole 15 are formed in the vicinity of the multi-hole water pipe 12. Two main nozzles 13A and 13A are formed in the high-pressure water pipes 13 and 13, and two sub nozzles 14A and an air nozzle 14B are formed in the high-pressure water pipe 14.
The third embodiment is an embodiment having a swing angle of 30 degrees. FIG. 5 of the third embodiment shows an explanatory diagram of the main part, and the same parts as those in FIGS. Omitted. In FIG. 5, high-pressure water pipes 13, 13, a high-pressure water pipe 14 and an air hole 15 are formed in the vicinity of the multi-hole water pipe 12. Two main nozzles 13A and 13A are formed in the high-pressure water pipes 13 and 13, and four sub-nozzles 14A and air nozzles 14B are formed in the high-pressure water pipe 14.
FIG. 6 is an explanatory view showing that the formed bodies 100 and 200 are formed by the two main nozzles 13A and 13A and the four sub nozzles 14A according to the third embodiment of FIG. The same parts as those in FIGS. 1 to 3 and FIG.
FIG. 7 is an explanatory view schematically showing the formed bodies 100 and 200 shown in FIG. 6 from a plane.
[0007]
In the conventional high-pressure jet agitation method, a multiple tube or the like is rotated by 360 degrees by an operation management device (shown device). In contrast, in the high-pressure jet agitation method according to the present invention having the above-described configuration, the multiple pipe 11 fixed to a monitor (not shown) is preset by an operation management device (not shown). It is configured to swing between 30 degrees and 60 degrees. The main nozzles 13A and 13A formed in the high-pressure water pipes 13 and 13 are set so that a hardened material of 20 to 60 Mpa · 50 to 200 liters / minute is jetted together with the air from the air nozzle 14B. Further, the sub nozzle 14A formed in the high-pressure water pipe 14 is set so that 20 to 60 Mpa · 30 to 100 liters / minute is injected.
[0008]
By the way, in the third embodiment of the present invention, the high-pressure water pipes 13, 13, and 14 are set in advance so as to swing by 30 degrees, so that they are formed in the high-pressure water pipes 13, 13, and 14. The two main nozzles 13A and 13A and the four sub-nozzles 14A also swing by 30 degrees. As described above, in the third embodiment of the present invention, the main nozzles 13A and 13A are swung by 30 degrees, whereas the conventional main nozzle is configured to rotate 360 degrees. Is 30 (in the third embodiment of the present invention, the swing of the main nozzle 13A is 30 degrees) / 360 (360 degrees in which the conventional main nozzle rotates) × 2 (the number of main nozzles in the third embodiment of the present invention is 2) = 1/6 (compared to the conventional method). Further, as shown in FIG. 5, the sub nozzle 14A formed on the high-pressure water pipe 14 is set to cut the earth and sand at the midpoint between the main nozzles 13A and 13A, and the sub nozzle 14A swings by 30 degrees. Therefore, the volume of the cut soil is 30 (the sub-nozzle 14A of the third embodiment of the present invention is not swung) compared to the conventional main nozzle configured to rotate 360 degrees. 30 degrees) / 360 (36 degrees at which the conventional main nozzle rotates) × 4 (the number of sub-nozzles in the third embodiment of the present invention is four) = 1/3 (compared to the conventional).
Thus, when the volume of the cut soil is compared with the conventional method, 30 (in the third embodiment of the present invention, the swing of the main nozzle 13A is 30 degrees) / 360 (360 degrees where the conventional main nozzle rotates) × 2 (The number of main nozzles of the third embodiment of the present invention is 2) = 1/6 (compared with the conventional method) and 30 (the swing of the sub nozzle 14A of the third embodiment of the present invention is 30 degrees) / 360 ( This is the total of 360 degrees at which the conventional main nozzle rotates) × 4 (the number of sub-nozzles in the third embodiment of the present invention is four) = 1/3 (compared with the conventional).
For this reason, the capacity of the cut earth and sand is ½ because it is the sum of 1/6 of the main nozzles 13A and 13A (compared to the conventional) and 1/3 of the sub nozzle 14A (compared to the conventional).
[0009]
As described above, since the high-pressure pipes 13, 13, and 14 are preset so as to swing by 30 degrees, the two main nozzles 13A, 13A formed on the high-pressure water pipes 13, 13, and 14 and The four sub nozzles 14A also swing by 30 degrees. For this reason, as shown in FIG. 7, a part (lower part) of the formed bodies 100 and 200 shown in FIG. 6 and FIG.
[0010]
As shown in FIG. 7, the main body nozzles 13A, 13A and the sub-nozzles 14A are swung by 30 degrees to form the formation bodies 100, 200 that are partially (lower) rectangular. By pulling up and moving the entire apparatus (not shown), the formed bodies 100 and 200 having the shape shown in FIG. 7 are continuously formed again. In this manner, the entire apparatus (not shown) can be moved to continuously form the formed bodies 100 and 200 having the shape shown in FIG.
[0011]
The present invention is not limited to the above-described embodiment, and there are various application examples and modifications. For example, in accordance with the soil quality and the like, any numerical value within the performance range of the entire apparatus (not shown) can be arbitrarily set. I can do it.
[0012]
In the present invention, as described above, the multi-tube 11 is configured to swing within a predetermined range (0 to 180 degrees) set in advance by an operation management operation (not shown). The main nozzles 13A and 13A formed in the high-pressure water pipes 13 and 13 are set such that a hardener of 20 to 60 Mpa · 50 to 200 liters / min is injected. Moreover, it sets so that 20-60 Mpa * 30-100 liter / min hardening | curing material may be injected from the sub nozzle 14A currently formed in the high-pressure water pipes 13 and 13. FIG. Thus, 20-60 Mpa · 50-200 liter / min of the hardener is injected from the main nozzles 13A, 13A, and 20-60 Mpa · 30-100 liter / min of the hardener is set from the sub nozzle 14A. In the third embodiment of the present invention, the main nozzles 13A, 13A and the sub-nozzle 14A are set to swing by 30 degrees, so that the main nozzle of the conventional method is set to rotate 360 degrees. In comparison with the above, as described above, the volume of the cut earth and sand is about ½.
[0013]
【The invention's effect】
As described above, by setting the main nozzles 13A, 13A and the sub-nozzles 14A to swing at an arbitrary angle while injecting a predetermined amount of the hardened material, the volume of the cut soil is approximately 1 / compared to the conventional method. Since it can reduce to 2, the cutting earth and sand used as an industrial waste etc. can be reduced significantly and the economic effect etc. are remarkable.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a main part in a high-pressure jet stirring method according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is an explanatory diagram taken along line B-B in FIG. 1 showing a first embodiment having a swing angle of 60 degrees.
FIG. 4 is an explanatory view taken along line BB in FIG. 1 showing a second embodiment having a swing angle of 45 degrees.
FIG. 5 is an explanatory diagram taken along line BB in FIG. 1 showing a third embodiment having a swing angle of 30 degrees.
FIG. 6 is an explanatory view showing that the formed bodies 100 and 200 are formed by a 30-degree swing, which is the third embodiment of FIG. 5;
FIG. 7 is an explanatory view schematically showing the construction bodies 100 and 200 shown in FIG. 6 from a plane.
[Explanation of symbols]
11 ... Multiple pipe 12 ... Drilling water pipe 13 ... High pressure water pipe 13A ... Main nozzle 14 ... High pressure water pipe 14A ... Sub nozzle 15 ... Air hole 100 ..Created body 200 ... formed body

Claims (1)

In the high-pressure jet stirring method to fix the ground in a predetermined range by spraying the hardener,
Two main nozzles and one to four sub-nozzles are attached to the high-pressure water pipe of the multiple pipe inserted into the borehole, and 20-60 Mpa · 50-200 liters / min of curing material is sprayed from the two main nozzles. At the same time, 20 to 60 Mpa · 30 to 100 liters / min of curing material is sprayed from the one to four sub nozzles, and the two main nozzles and the one to four sub nozzles are moved at 30 to 60 degrees. A step of swinging;
A step of sending air from the air nozzle formed in the multiple pipe simultaneously with the injection of the curing material;
Pulling up the multiple tube ;
Have
The sub-nozzle, mounted between the two Men'nozuru,
A high-pressure jet stirring method characterized by:

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