JP2001303545A - Device for mixing process construction method of high- pressure jet injection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothen the flow of liquid and reduce damage to connections, in a device for the process of mixing through high-pressure jet injection in which water/air injection nozzles comprising high-pressure water nozzles and air nozzles combined as multiple nozzles are provided and a monitor provided with a hardener nozzle for injecting a hardener below the water/air injection nozzles is attached to the end of an injection pipe having flow passages for ultra-high-pressure water, compressed air and the hardener. SOLUTION: The high-pressure water nozzles and the hardener nozzle have arcuate ends; for the ultra-high-pressure water flow passage and the hardener flow passage which are connected to the ends, each of the ends has the same tubular shape forming the flow passages and so does not protrude into the flow passages.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to improvement of soft ground,
For high-pressure jet injection mixing method used in the so-called jet grout method, which can form a uniform and high quality ground improvement body in the ground hardening material injection method constructed for the purpose of construction structure foundation etc. It concerns the device.

[0002]

2. Description of the Related Art The high-pressure jet injection mixing process method destroys the structure of the ground by strong energy obtained by applying high pressure to water, and creates artificial space in the ground by discharging slime to the surface of the ground, A hardened material is filled to form a solid compact.

In this high-pressure jet injection mixing method, as shown in FIG. 8, a triple pipe is used as an injection pipe 1, and ultra-high-pressure water 3 with compressed air 2 is rotated and jetted to the ground. To cut the ground, discharge the slime 4 to the ground surface, and simultaneously fill the hardening material 5 to create a columnar consolidated body (column jet grouting method)
Will be described.

As shown in FIG. 9, a monitor 1b is attached to the injection pipe 1 at an end of an injection pipe main body 1a having an ultrahigh-pressure water flow path 6, a hardening material flow path 7, and a compressed air flow path 8. Ultra high-pressure water, compressed air,
This is provided with an injection pipe swivel 1c for feeding a hardening material.

In the monitor 1b, a high-pressure water nozzle 9 and an air nozzle 10 are combined, and an ultra-high-pressure water 3 and a compressed air 2 are simultaneously injected to provide an injection nozzle 11 for cutting earth and sand in a predetermined formation range. A hardening material nozzle 12 for injecting the hardening material 5 is provided below. Reference numeral 13 in the figure is a tip shoe.

As shown in FIG. 10, the triple pipe method (column jet grout method) is performed by using a boring machine 14 to form a guide hole with a casing pipe 17 having a metal crown 15 and a stabilizer 16 at its tip.
As shown in (1), the injection pipe main body 1a of the injection pipe 1 of a triple pipe is built in the casing pipe 17 by a truck crane or the like.

[0007] As shown in FIG. 12, the casing pipe 17 is pulled out (the casing pipe may be left depending on the situation), a column machine (creation machine) 18 is installed as shown in FIG. An injection pipe swivel 1c is installed at the upper end of the column, and compressed air 2, ultra-high pressure water 3, and hardening material 5 are poured out, and the injection pipe 1 is pulled up while rotating. As shown in FIG.

[0008] As described above, from the injection nozzle 11, ultra-high pressure water wrapped around by compressed air is injected, and this disturbs the soil particles in the ground, thereby creating an artificial space. Next, the hardening material extracted from the hardening material nozzle 12 is filled. The compressed air injected from around the injection nozzle 11 is regarded as one of the indispensable factors for giving an exquisite effect called an air lift effect.

[0009]

However, in the apparatus of the conventional triple pipe method (column jet grout method),
Taking the injection nozzle 11 as an example, the end 9a (tail) of the high-pressure water nozzle 9 communicating with the ultrahigh-pressure water channel 6 is cut horizontally as shown in FIG. It joins so that it may partially enter the inner tube to be formed. Also,
Similarly, the hardening material nozzle 12 is connected so as to partially enter the hardening material channel 7 ".

As a result, unevenness occurs in the inner tube of the monitor, so that smooth flow is hindered, and the impact energy of the liquid causes severe damage to the portion.
The monitor body as well as the nozzle may be damaged.

An object of the present invention is to provide an apparatus for a high-pressure jet injection / mixing method capable of solving the above-mentioned disadvantages of the prior art, smoothing the flow of liquid, and reducing damage to the connecting portion.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention combines a high-pressure water nozzle and an air nozzle to simultaneously jet high-pressure water and compressed air to cut earth and sand within a predetermined formation range. For a high-pressure jet injection mixing process method, a monitor equipped with a curing agent nozzle for injecting the curing agent below the injection nozzle is attached to the tip of an injection pipe having a flow path for ultra-high pressure water, compressed air, and curing agent. In the device,
The end of the nozzle has an arc shape, the same shape as the tube that forms the flow path to be connected, so that it does not protrude into the flow path, and the nozzle is inserted into the monitor It is the gist.

According to the first aspect of the present invention, there is no unevenness in the inner tube of the monitor, and the flow of the liquid can be rectified. As a result, the flow of the liquid becomes smooth, and damage to the connection portion is reduced.

According to the second aspect of the present invention, in addition to the above-described operation, the nozzle is of a plug-in type in the monitor, so that the pipe which forms the flow path in advance with respect to the flow path connecting the nozzle end portion is formed. By processing into the same arc shape as the shape, it is possible to easily perform positioning so as not to protrude into the flow path when connected.

[0015]

Embodiments of the present invention will be described below in detail. FIG. 1 is a longitudinal sectional side view of an essential part showing an embodiment of a high-pressure jet injection mixing method according to the present invention.
Is a cross-sectional side view of the main part of the above, and FIG.
In FIG. 7, reference numeral 1b denotes a monitor attached to the lower end of the injection tube main body. Although not shown, the injection pipe main body is constituted by a multi-tube of an inner pipe forming an ultra-high pressure water flow path, a middle pipe forming a hardening material flow path, and an outer pipe forming a compressed air flow path, Upper nozzle body 33a and lower nozzle body 33b
The monitor 1b consisting of a combination of these inner tubes,
With a multi-tube structure having a tube whose end is fitted to the middle tube and the outer tube,
It has a middle pipe joint 47 and an inner pipe joint 48, and has an ultrahigh-pressure water flow path 6, a hardening material flow path 7, and a compressed air flow path 8 formed therein.

Then, the upper nozzle body 33 of the monitor 1b
In FIG. 3A, the injection nozzles 11 for combining the high-pressure water nozzle 9 and the air nozzle 10 are provided in pairs so as to face in opposite directions in the direction perpendicular to the axis of the entire injection pipe, and in such a manner as to be slightly displaced vertically. As for the high-pressure water nozzle 9, each of the two injection nozzles 11 communicated with the ultrahigh-pressure water flow path 6, and the air nozzle 10 communicated with the compressed air flow path 8.

The spray nozzle 11 is provided with an air nozzle 10 surrounding the high pressure water nozzle 9 with the high pressure water nozzle 9 as a center.
An air cap 38 is fitted to the air nozzle 10 as a pressing rubber rubber 39. Further, a screw 42 is provided on the outer side surface of the air cap 38 so that the air cap 38 can be screwed into the upper nozzle body 33a as a nut type.

The air cap 38 is a hat having an open top plate, and locks the air nozzle 10 housed by a snap ring 40 fitted in the set groove at a boundary position of the inner peripheral surface.

Further, among the spray nozzles 11, the ultrahigh-pressure water flow path 6 to which the high-pressure water nozzle 9 communicates is an inner pipe made of a circular pipe, while the nozzle end 9a of the high-pressure water nozzle 9 as shown in FIG.
Has a circular arc shape, which is the same as the shape of the inner tube forming the ultra high pressure water flow path 6 to be connected, so as not to protrude into the ultra high pressure water flow path 6.

The high-pressure water nozzle 9 is of a type that can be inserted into the upper nozzle body 33a of the monitor 1b. The nozzle end 9a is formed in an arc shape in advance, and an inner tube that forms a flow path when inserted is formed. Ultra high-pressure water channel 6 that matches the shape
Positioning that does not project inside can be performed.

After the high-pressure water nozzle 9 is inserted, the air nozzle 38 and the air cap 38 to which the rubber rubber 39 is attached are attached.
, And hold it down.

As shown in FIG. 7, the lower nozzle body 33b
Is fitted to the tip end of the upper nozzle body 33a via an adjustment pipe 43. The adjustment pipe 43 forms a hardening material flow path 7 'communicating with the hardening material flow path 7 of the upper nozzle body 33a at the center.
In the lower nozzle body 33b, a hardening material channel 7 ″ communicating with the hardening material channel 7 ′ is formed at the center.

The lower nozzle body 33b is provided so that the hardening material nozzle 12 communicates with the hardening material flow path 7 ". As shown in FIGS. To face each other in opposite directions, and
It was provided so that the position was slightly shifted vertically. In the figure, reference numeral 44 denotes a nozzle nut for fixing the hardening material nozzle 12, 45 denotes an O-ring, and 46 denotes a snap ring.

The hardening material flow path 7 ″ to which the hardening material nozzle 12 communicates is an inner tube made of a circular tube. As shown in FIG. 6, the hardening material nozzle 12 also has a nozzle end portion 12a having an arc shape, and is connected to the hardening material passage. The material flow path 7 "was formed in the same arc shape as the shape of the inner tube forming the flow path so that it did not protrude into the hardened material flow path 7".

The hardening material nozzle 12 is also connected to the monitor 1b.
Is inserted into the lower nozzle body 33b, and is fixed with the nozzle nut 44 after insertion. The nozzle end 12a is formed in an arc shape in advance, and when inserted, the hardening material flow path 7 ″ is formed. The inner pipe can be positioned so as not to protrude into the hardened material flow path 7 ″.

The method of use is as described with reference to FIGS. 10 to 14, but a guide hole is constructed by a boring machine, an injection pipe is erected in a casing pipe of this guide hole by a truck crane or the like, and the casing pipe is mounted. Pulling out (the casing pipe may be left depending on the situation), installing a column machine (creation machine), and installing an injection pipe swivel at the upper end of the injection pipe main body to supply ultra-high pressure water with compressed air The slime 4 is discharged to the surface of the ground by being rotated and jetted onto the ground, and the slime 4 is discharged to the ground and simultaneously filled with a hardening material to form a columnar consolidated body.

In particular, ultra-high pressure water wrapped around by compressed air is jetted from the jet nozzle 11, which creates an artificial space by disturbing the underground soil particles. Is filled with a hardening material extracted from the hardening material nozzle 12.

Since the injection nozzles 11 are provided in pairs so as to face each other in the direction perpendicular to the axis of the injection pipe, the ultrahigh-pressure water 3 with compressed air 2 is supplied from the two injection nozzles 11.
To simultaneously cut in two directions.

The hardening material nozzles 12 are also provided in pairs so as to face in opposite directions in the direction perpendicular to the axis of the entire injection pipe, and are also slightly shifted vertically so that many hardening materials can be used. It can discharge widely in a short time.

[0030]

As described above, the apparatus for the high-pressure jet injection mixing method of the present invention combines a high-pressure water nozzle and an air nozzle, and simultaneously injects high-pressure water and compressed air to discharge soil within a predetermined formation range. A high-pressure jet sprayer with an injection nozzle for cutting, and a monitor with a hardener injection nozzle below the injection nozzle attached to the tip of an injection pipe having a flow path for ultra-high pressure water, compressed air, and hardener In the equipment for the mixing process method, the flow of liquid becomes smooth, and
This can reduce the damage of the connection portion.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a main part showing a first embodiment of an apparatus for a high-pressure jet injection mixing treatment method of the present invention.

FIG. 2 is a cross-sectional plan view of a main part showing a first embodiment of the high-pressure jet injection mixing processing method of the present invention.

FIG. 3 is a vertical sectional side view of a main part showing a second embodiment of the apparatus for a high-pressure jet injection mixing treatment method of the present invention.

FIG. 4 is a cross-sectional side view of a main part showing a second embodiment of the apparatus for a high-pressure jet injection mixing treatment method of the present invention.

FIG. 5 is a cross-sectional plan view of a high-pressure water nozzle in the first embodiment of the high-pressure jet injection mixing method according to the present invention.

FIG. 6 is a cross-sectional plan view of a hardening material nozzle in a second embodiment of the apparatus for a high-pressure jet injection mixing treatment method according to the present invention.

FIG. 7 is an overall vertical side view showing an embodiment of the high-pressure jet injection mixing processing method apparatus according to the present invention.

FIG. 8 is a vertical sectional side view showing a triple pipe method (column jet grout method).

FIG. 9 is a vertical sectional side view of a triple pipe used in a triple pipe method (column jet grout method).

Fig. 10 Triple pipe method (column jet grout method)
It is a vertical side view of the 1st process.

Fig. 11 Triple pipe method (column jet grout method)
It is a vertical side view of the 2nd process.

Fig. 12 Triple pipe method (column jet grout method)
It is a vertical side view of the 3rd process.

Fig. 13 Triple pipe method (column jet grout method)
It is a vertical side view of the 4th process.

FIG. 14: Triple pipe method (column jet grout method)
It is a vertical side view of the 5th process.

FIG. 15 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Injection pipe 1a ... Injection pipe main body 1b ... Monitor 1c ... Injection pipe swivel 2 ... Compressed air 3 ... Ultra-high pressure water 4 ... Slime 5 ... Hardening material 6 ... Ultra high pressure water flow path 7,7 ', 7 "... Hardening material flow Road 8 ... Compressed air flow path 9 ... High pressure water nozzle 9a ... Nozzle end 10 ... Air nozzle 11 ... Injection nozzle 12 ... Hardening material nozzle 12a ... Nozzle end 13 ... Tip shoe 14 ... Boring machine 15 ... Metal crown 16 ... Stabilizer 17 ... casing pipe 18 ... column machine 19a, 19b ... sensor 20 ... inner pipe 21 ... middle inner pipe 22 ... middle and outer pipe 23 ... outer pipe 24 ... perforated pipe 25 ... metal crown 26 ... high-pressure water inlet 27a, 27b ... compressed air Injection port 28: Hardening material injection port 29: Perforated pipe 29a, 29b, 29
b ', 29c ... hole 30 ... opening 31 ... rubber rubber 32 ... rubber protector 32a ... through hole 33a ... upper nozzle body 33b ... lower nozzle body 34 ... partition plate 35 ... partition plate 36 ... partition wall 38 ... air cap 39 ... rubber rubber 40 ... snap Ring 42… Screw 43… Adjusting tube 44… Nozzle nut 45… O-ring 46… Snap ring 47… Middle tube joint 48… Inner tube joint 49… Opening

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Fumihiko Kajita 8-14-14 Ginza, Chuo-ku, Tokyo Inside Nittoku Construction Co., Ltd. (72) Koichi Inagawa 8-14-14 Ginza, Chuo-ku, Tokyo (72) Inventor Kiyoaki Okubo 3-4-1 Marunouchi, Chiyoda-ku, Tokyo Hanagata Machinery Co., Ltd. (72) Yoshiaki Nakazawa 3-4-1 Marunouchi, Chiyoda-ku, Tokyo Hana F-term (for reference) 2D040 AA01 AB03 BA01 BA02 BB01 BD05 CB03 DA12 DA17

Claims (2)

[Claims] 1. A combination of a high pressure water nozzle and an air nozzle,
A high-pressure water and compressed air are simultaneously injected to provide a spray nozzle for cutting earth and sand in a predetermined creation range, and a monitor provided with a hardening material nozzle for spraying a hardening material below the spray nozzle is provided with an ultra-high pressure water, compressed air, In an apparatus for a high-pressure jet injection mixing processing method attached to the tip of an injection pipe having a flow path of a hardening material, a nozzle end has an arc shape, and has the same shape as a pipe forming the flow path with respect to a flow path to be connected. A high-pressure jet-injection-mixing-processing method, wherein the apparatus does not protrude into the flow path. 2. The high-pressure jet injection mixing method according to claim 1, wherein the nozzle is inserted into a monitor.