JP3770295B2 - High-pressure jet injection mixing processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a so-called jet grouting method, which is a high-pressure jet mixing treatment method that can form a uniform, good quality ground improvement body in a ground hardening material injection method that is constructed for the purpose of soft ground improvement, construction structure foundations, etc. it relates a high-pressure jet mixing treatment MakotoSo location to be used.
[0002]
[Prior art]
The high-pressure jet injection mixing method destroys the structure of the ground by powerful energy obtained by applying high pressure to water, creates an artificial space in the ground by discharging slime to the surface, and fills with hardener. A strong solid body.
[0003]
As shown in FIG. 5 , a triple pipe is used as the injection pipe 1, ultrahigh pressure water 3 accompanied with compressed air 2 is rotated and ejected to the ground, the ground is cut, and the slime 4 is discharged to the ground. A triple pipe construction method (column jet grouting method) in which the hardener 5 is simultaneously filled to form a cylindrical solid body will be described.
[0004]
As shown in FIG. 6 , the injection tube 1 has a monitor 1b attached to the tip of an injection tube main body 1a having an ultrahigh pressure water flow channel 6, a compressed air flow channel 7, and a hardening material flow channel 8 at the top. An injection pipe swivel 1c for sending ultrahigh pressure water, compressed air, and a hardener is provided in each flow path of the injection pipe main body 1a.
[0005]
In the monitor 1b, a high-pressure water nozzle 9 and an air nozzle 10 are combined, and a super-high-pressure water 3 and compressed air 2 are jetted at the same time to provide a jet nozzle 11 for cutting earth and sand within a predetermined formation range. A curing material nozzle 12 for injecting the curing material 5 was provided. In the figure, 13 is a tip shoe.
[0006]
As shown in FIG. 7 , the triple pipe method (column jet grouting method) is constructed as shown in FIG. 8 , in which a guide hole is constructed with a casing pipe 17 having a metal crown 15 and a stabilizer 16 at the tip with a boring machine 14. In addition, the injection pipe body 1a of the injection pipe 1 using a triple pipe is installed in the casing pipe 17 with a truck crane or the like.
[0007]
As shown in FIG. 9 , the casing pipe 17 is pulled out (the casing pipe may be left depending on the situation), the building machine 18 is installed as shown in FIG. 10 , and the injection pipe swivel is installed at the upper end of the injection pipe main body 1a. 1c was placed, compressed air 2, ultra-high pressure water 3, pulled while rotating the injection tube 1 by issuing the stiffeners 5 Note, the column construction completed as shown in FIG. 11.
[0008]
In this way, the injection nozzle 11 is injected with ultra-high pressure water surrounded by compressed air, which disturbs the soil particles in the ground and creates an artificial space. The hardened material extracted from the material nozzle 12 is filled. The compressed air injected from the periphery of the injection nozzle 11 is regarded as one of the factors indispensable for providing an exquisite effect called an air lift effect.
[0009]
[Problems to be solved by the invention]
However, in the conventional triple pipe method (column jet grouting method), there is only one injection nozzle 11 and the ground cutting ability is limited, so the pulling speed of the injection tube 1 is limited. By the way, the capacity of the ultra-high pressure pump that is encapsulated with compressed air around the injection nozzle 11 and injected is assumed to be 70 liters / min 400 kgf / cm ² , and the rotation speed is 5-6 rpm. 16-25min / m was considered appropriate.
[0010]
In Japanese Patent Publication No. 6-54007, a side wall of a monitor installed at the tip of an injection rod having four flow paths having a polymerization structure is connected to each flow path in the rod and has a polymerization structure that is polymerized at an injection port. One having two upper and lower spray nozzles is shown.
[0011]
These two nozzles eject pressurized gas from the surrounding nozzles of each nozzle, ultra-high pressure water from the upper nozzle, and ultra-high pressure curing material from the lower nozzle.
[0012]
Accordingly, the one disclosed in Japanese Patent Publication No. 6-54007 has the effect that the hardened material can be injected at an ultra-high pressure, but the cutting ability with the ultra-high-pressure water that is encapsulated with the compressed air and injected is not improved. Absent.
[0013]
An object of the present invention to eliminate the disadvantages of the prior art, by increased cutting ability of the ultra high pressure water, it is possible to increase the pulling speed, a high-pressure jet mixing treatment MakotoSo location where construction performance is enhanced Is to provide.
[0014]
[Means for Solving the Problems]
Since the present invention is to achieve the above object, note pipe when pulling the rotate, the ultra-high pressure water with compressed air is ejected into the ground from the injection nozzle is filled with curing material while cutting the ground, cylindrical Combined with a high-pressure water nozzle and an air nozzle at the tip of the injection tube main body with a flow path for ultra-high pressure water, compressed air, and hardener Injecting high pressure water and compressed air at the same time to provide a spray nozzle that cuts the soil within a predetermined range, and installing a monitor with a hardener nozzle that sprays the hardener below this spray nozzle ultrahigh pressure water to the flow channel of the injection tube body portion at the top, compressed air, in a high pressure jet mixing treatment MakotoSo location in which a injection pipe swivel Send hardener,
The injection tube main body is a multi- tube body formed by forming a tube forming an ultra-high pressure water flow channel at the center, and arranging two tubes forming a compressed air flow channel and a tube forming a hardening material flow channel around the tube. The injection nozzle that combines the high-pressure water nozzle and the air nozzle above the monitor is provided in pairs with the position slightly shifted up and down so as to be perpendicular to the injection tube axis and opposite to each other. It is assumed that ultra-high pressure water with compressed air is injected from the injection nozzle and cuts in two directions at the same time. Both high-pressure water nozzles communicate with the ultra-high-pressure water flow path of the central pipe , and each air nozzle is connected to an individual pipe. The gist of the invention is that it is communicated with the compressed air flow path.
[0015]
According to the present invention, the injection nozzle that combines the high-pressure water nozzle and the air nozzle above the monitor is provided in pairs so as to be orthogonal to the injection tube axis and opposite to each other. The ground cutting ability with ultra-high pressure water encapsulated in compressed air is doubled, and as a result, there is no problem even if the pulling time is increased by doubling the pulling speed of the injection pipe and the construction performance is improved. be able to.
[0016]
Also, by increasing the cutting ability in this way, in some cases, hardened materials can be used that are more serious and more viscous than conventional blends, and since the hardened material is less diluted, the yield in the ground is good. The quality (strength) can be secured by pulling up quickly.
[0017]
In addition, the injection nozzle that combines the two high-pressure water nozzles and the air nozzle is an original flow path for the compressed air flow path, i.e., a separate system line, even if one of the injection nozzles is blocked, The pressure difference due to the blockage does not affect other injection nozzles. In this way, it becomes possible to adjust the air volume and pressure for each injection nozzle during the creation of a single pipe depending on the ground and depth.
[0018]
Follicle Further, the injection nozzle provided in another to face in opposite directions pairs Cartesian direction relative injection tube axis, because it was slightly shifting the position in the vertical, by compressed air when rotating the injection tube The ground cutting planes in the combined ultra-high pressure water do not overlap completely, so that the spread can be ensured up and down, and synergistic action can be expected because there is no separation between the top and bottom .
[0019]
In addition to the action, the injection tube body portion by configuring it Takantai formed by arranging a central ultrahigh pressure water flow path around the cured material flow path and the compressed air flow path, the configuration of the injection tube body portion Can be easy.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail. When the high-pressure jet injection mixing method performed using the apparatus of the present invention is described with reference to FIG. 1, the construction procedure of the triple pipe method (column jet grout method) described in the conventional example is basically the same. A combination of a high-pressure water nozzle and an air nozzle at the tip of an injection pipe 1 having a flow path of ultra-high pressure water 3, compressed air 2 and hardened material 5, and simultaneously injecting high-pressure water and compressed air, earth and sand within a predetermined formation range An injection nozzle 11 is provided for cutting the nozzle, and a monitor 1b provided with a curing material nozzle 12 for injecting the curing material 5 is attached below the injection nozzle 11, and each of the injection tube body 1a is mounted on the top of the injection tube body 1a. Using a high-pressure jet injection mixing treatment apparatus provided with an injection pipe swivel 1c for sending ultra-high pressure water, compressed air, and a hardener to the flow path, when the injection pipe 1 is pulled up, ultra-high pressure water 3 with compressed air 2 is used. From the injection nozzle 11 And is ejected by rotating the board to cut the ground, the cured material 5 with discharging the slime to the surface is simultaneously filled, it is to construct a cylindrical solid sintered body.
[0021]
In the present invention, the injection nozzles 11 are provided in pairs so as to face each other in the direction perpendicular to the axis of the injection tube 1, and the ultra-high pressure water 3 accompanied with the compressed air 2 is injected from the two injection nozzles 11. Therefore, the two directions were cut simultaneously.
[0022]
The compressed air 2 is sent to each injection nozzle 11 through a separate system line, and sensors 19a, 19b such as an air volume / pressure gauge are provided for each line for monitoring / control.
[0023]
Next, an apparatus of the present invention for performing such a method will be described. 2, 3, 4 is a longitudinal side view showing an implementation form of the injection tube 1, reference numeral 1a is injection tube main body, 1b the monitor attached to its lower end, 1c the top of the injection tube main body 1a It is an injection tube swivel provided in the.
[0024]
Note pipe main body 1a is a tube to form a tube 29a for forming the ultra-high pressure water channel 6 in the center, forming a tube 29b that forms a compressed air channel 7 around it, and 29b 'curing material passage 8 29c And a multi-tubular body 29 formed side by side. In the illustrated example, the tubes 29b and 29b 'are arranged on the left and right with the tube 29a in between, and two tubes 29c are formed side by side between these tubes 29b and 29b'.
[0025]
In the monitor 1b, the injection nozzle 11 combining the high-pressure water nozzle 9 and the air nozzle 10 is provided in a pair so as to face each other in the direction perpendicular to the axis of the injection pipe 1, and to be slightly displaced in the vertical direction. The high-pressure water nozzle 9 communicates with the pipe 29a forming the ultra-high-pressure water flow path 6 in accordance with the injection pipe main body 1a of the multi-tubular body 29, and the air nozzle 10 The injection nozzle 11 (the lower side in the figure) communicated with the pipe 29b forming the compressed air flow path 7, and the other communicated with the pipe 29b 'forming the compressed air flow path 7.
[0026]
Further, in the monitor 1b, a hardener nozzle 12 is provided below the two injection nozzles 11, and this hardener nozzle 12 communicates with a pipe 29c forming the hardener flow path 8. In this embodiment, a metal crown 25 is provided at the tip of the monitor 1b.
[0027]
The injection tube swivel 1c includes a high-pressure water injection port 26 that communicates with a tube 29a that forms the ultra-high-pressure water channel 6 of the injection tube body 1a, a compressed air injection port 27a that communicates with a tube 29b that forms the compressed air channel 7, A compressed air inlet 27b that communicates with a pipe 29b that forms a compressed air flow path 7, and a hardener inlet 28 that communicates with a pipe 29c that forms a hardened material flow path 8, and these high-pressure water inlets 26, The swivel mechanism is set so that the compressed air inlets 27a and 27b and the hardener inlet 28 can rotate independently of each other.
[0028]
Note that monitor 1b, configured to freely fit removably into the injection tube main body 1a in the injection pipe swivel 1c coupling may be employed.
[0029]
【The invention's effect】
As described above, the high-pressure jet jet mixing treatment apparatus of the present invention can increase the pulling speed by increasing the cutting ability with ultra-high pressure water, so that the construction performance is improved.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a high-pressure jet injection mixing method using the apparatus of the present invention.
2 is a longitudinal side view partially omitted showing the implementation form of high pressure jet mixing apparatus of the present invention.
3 is a sectional view taken along line B-B of FIG.
4 is a sectional view taken along line C-C of Figure 2.
FIG. 5 is a longitudinal side view showing a conventional triple pipe method (column jet grouting method).
FIG. 6 is a longitudinal side view of a triple pipe used in a conventional triple pipe method (column jet grouting method).
FIG. 7 is a longitudinal side view of a first step of a conventional triple pipe method (column jet grouting method).
FIG. 8 is a longitudinal side view of a second step of a conventional triple pipe method (column jet grouting method).
FIG. 9 is a longitudinal side view of a third step of a conventional triple pipe method (column jet grouting method).
FIG. 10 is a longitudinal side view of a fourth step of a conventional triple pipe method (column jet grouting method).
FIG. 11 is a vertical side view of a fifth step of a conventional triple pipe method (column jet grouting method).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Injection pipe 1a ... Injection pipe main-body part 1b ... Monitor 1c ... Injection pipe swivel 2 ... Compressed air 3 ... Super-high pressure water 4 ... Slime 5 ... Hardening material 6 ... Ultra-high pressure water flow path 7 ... Compressed air flow path 8 ... Hardening material Flow path 9 ... High pressure water nozzle 10 ... Air nozzle
11 ... Injection nozzle 12 ... Curing material nozzle
13 ... Tip shoe 14 ... Boring machine
15 ... Metal Crown 16 ... Stabilizer
17 ... Casing pipe 18 ... Creation machine
19a, 19b ... Sensor
25… Metal crown 26… High pressure water inlet
27a, 27b ... compressed air inlet 28 ... hardener inlet
29 ... multi-tube 29a, 29b, 29b ', 29c ... tube

Claims (1)

High-pressure jet injection that forms ultra-high pressure water with compressed air from the injection nozzle onto the ground to cut the ground and fill with a hardener to form a cylindrical solid body when the injection pipe is rotated and pulled up As a method used for the mixing treatment method, a combination of a high pressure water nozzle and an air nozzle at the tip of an injection pipe main body having a flow path of ultra-high pressure water, compressed air, and a curing material is jetted simultaneously. The injection nozzle for cutting the soil within a predetermined formation range is provided, and a monitor provided with a curing material nozzle for injecting the curing material is attached below the injection nozzle, and each of the injection tube main body portions is attached to the top of the injection tube main body portion. ultrahigh pressure water flow path, compressed air, in a high pressure jet mixing treatment MakotoSo location in which a injection pipe swivel Send hardener,
The injection tube main body is a multi-tube body formed by forming a tube forming an ultra-high pressure water flow channel at the center, and arranging two tubes forming a compressed air flow channel and a tube forming a hardening material flow channel around the tube. The injection nozzle that combines the high-pressure water nozzle and the air nozzle above the monitor is provided in pairs with the position slightly shifted up and down so as to be perpendicular to the injection tube axis and opposite to each other. It is assumed that ultra-high pressure water with compressed air is injected from the injection nozzle and cuts in two directions at the same time. Both high-pressure water nozzles communicate with the ultra-high-pressure water flow path of the central pipe , and each air nozzle is connected to an individual pipe. high pressure jet mixing treatment MakotoSo location, characterized in that in communication with the compressed air flow path.

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