JPH0473315A - Preparation of hardened body - Google Patents

Abstract

PURPOSE:To eliminate the waste of a solidifying material, etc., by injecting a specified fluid from the front end of a rod mechanism, drawing out the rod mechanism while the ground in the periphery of the front end section is excavated and an agitating blade is turned and forming a hardened body in the ground. CONSTITUTION:A rod mechanism 3 is composed of an outer rod 13, an agitating blade 5 installed to the peripheral section of the front end of the outer rod 13, an inner rod 14 rotatably inserted into the outer rod 13, a water injection nozzle mounted at the front end of the inner rod 14, solidifying-material injection nozzles 16 set up to the side face of the front end section of the inner rod 14, and an automatic bearing 17, which is fixed on the upper end section side of the inner rod 14 and rotatably supports the upper end section side of the outer rod 13 to the rear end of the inner rod 14 while preventing rotation by a rod drive mechanism 2. A solidifying material 4 is injected from the high- pressure injection sections 16, and the ground in the periphery of the front end is excavated and the agitating blades 5 are turned and the rod mechanism 3 is drawn out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forming a hardened body in the ground by high-pressure injection (injection).

[Prior Art] A drilling device disclosed in Japanese Patent Publication No. 18690/1988 has been known as a device used to form a hardened body in the ground.

As shown in FIG. 16, this excavation equipment includes a bar-shaped rod 101 that is configured to be movable in the vertical direction, a rotation drive unit 102 that rotates the rod 101, and a rotary drive unit 102 that is installed at the tip of the rod 101 and has an eaves cutter on the side. Injection nozzle 10 that injects 105
3, the loft 101 is pulled out at a predetermined speed, and the surrounding ground is excavated by injecting excavation water 105 from an injection nozzle 103 while rotating the lot 101 by a rotary drive unit 102.

[Problems to be Solved by the Invention] By the way, when forming a hardened material in the ground using such a conventional excavation device, the solidifying material or the like is injected from the injection nozzle 103 to form a hardened material while excavating the surrounding ground. Assimilated materials must be injected into it.

However, when such work is performed, the rod 10
There was a problem in that the assimilated material etc. injected into the ground through the gap 107 formed between the injection nozzle 103 and the ground overflowed to the ground surface, and the assimilated material etc. injected from the injection nozzle 103 was wasted.

In addition, since the assimilated material and the like that overflow onto the ground surface must be treated as industrial waste, there is a problem in that the construction cost including this amount increases.

In view of the above circumstances, the present invention prevents assimilated materials injected into the ground from overflowing to the ground surface, thereby eliminating waste of assimilated materials, and eliminates the need to dispose of assimilated materials that overflow to the ground surface. The purpose of the present invention is to provide a method for producing a cured body that can reduce construction costs.

[Means for Solving the Problems] In order to achieve the above object, the method for creating a hardened body according to the present invention involves penetrating a lot mechanism into the ground and injecting a predetermined fluid to form a hardened body in the ground. In the method for creating a hardened body, the fluid is injected in a predetermined direction from a high-pressure injection part provided on the side of the tip of the rod mechanism while it is penetrated into the ground, and the high-pressure injection is carried out while excavating the ground around the tip. It is characterized by forming a hardened body in the ground by pulling out the loft mechanism at a predetermined speed while rotating a stirring blade installed slightly above the ground.

[Operation] With the above configuration, a predetermined fluid is injected from the high-pressure injection part with the rot mechanism penetrating into the ground, and the fluid is applied to a small ball of the high-pressure injection part while scraping the ground around the side of the tip. By rotating the stirrer blades and pulling out the rod mechanism at a predetermined speed, the ground on the ground side from the high-pressure injection part is stirred and the fluid injected from the high-pressure injection part is prevented from overflowing to the ground surface. while forming a hardened body in the ground.

[Example] FIG. 1 is a front view showing an example of a cured body forming apparatus used in a first embodiment of the cured body forming method according to the present invention.

The hardened body creation device shown in this figure is water/assimilation material supply device 1.
, a rod drive mechanism 2, and a rod mechanism 3. After the rod mechanism 3 is penetrated into the ground to a predetermined depth, the solidifying material (or straw material) 4 is inserted from the rod mechanism 3 to a predetermined depth. By rotating the agitating blade 5 of the rod mechanism 3 and raising it at a predetermined speed to t while injecting it in the direction of Create a hardened body.

The water/assimilation material supply device 1 includes a tank 6 that stores the assimilation material 4.
, a pump 7 that pumps out the solidified material 4 in the tank 6, a hose 8 that guides the solidified material 4 pumped out by the pump 7 to the lot mechanism 3, a tank 10 that stores water 9, and a tank 1.
a pump 11 that pumps out the water 9 in the 0, and a hose 1 that guides the water 9 pumped out by the pump 11 to the loft mechanism 3.
2, and the solidifying material 4 and water 9 pumped out by operating each pump 7.11 are supplied to the rod mechanism 3 through a hose 8.12.

The rod mechanism 3 includes an outer rod 13 formed in a cylindrical shape as shown in FIG. a rod-shaped inner rod 14 rotatably inserted into the rod 13;
A water injection nozzle 15 provided at the tip of the inner rod 14;
As shown in FIG. 3, four solidifying material injection nozzles 16 are provided on the side surface of the tip of the inner rod 14, and are fixed to the rear end (upper end side) of the inner rod 14. The rotary bearing 17 rotatably supports the rear end (upper end portion flllLl) of the outer rod 13, and is supported so as not to rotate by the rod drive mechanism 2.

Then, at the time of penetration, '
While jetting the supplied water 9 from the water jet nozzle 15, the outer rod 13 is moved by the driving force from the rod driving mechanism 2.
Rotate it and push it into the ground. Also, when pulling out,
While the solidifying material 4 supplied from the water/assimilation material supply device 21 is injected from each solidifying material injection nozzle 16, the outer rod 13 is rotated by the driving force of the rod drive mechanism 2 and slowly pulled out from the ground.

Further, the rod drive mechanism 2 includes an outer rod 1 of the rod mechanism 3.
3, a vertical drive section 19 that moves the outer rod 13 of the rod mechanism 3 in the vertical direction, and a guide leader 20 that supports the bearing 17 so that it can slide vertically while preventing its rotation. The entire rod mechanism 3 is moved up and down while rotating the outer rod 13 with the guide leader 20 preventing the rotation of the bearing 17 of the rod mechanism 3 and the rotation of the inner rod 14.

Next, the method for producing a cured body of this example will be explained with reference to FIGS. 4(a) to 4(C).

First, in this hardened body forming apparatus, the guide leader 20 prevents the rotation of the bearing 17 to inhibit the rotation of the inner rod 14, and supports the bearing 17 so as to be slidable in the vertical direction.

When the rod mechanism 3 penetrates into the ground, the loft drive mechanism 2 and the like are operated to rotate the outer rod 13 of the rod mechanism 3 as shown in FIG. 4(a).
Push it into the ground from the tip side. In this case, the water/assimilation material supply device 1 is operated as necessary, and the water injection nozzle 15 or the solidification material injection nozzle 16 of the inner rod 14 is activated.
The rot mechanism 3 may be pushed into the ground without injecting the water 9 or the assimilating material 4.

Thereafter, as shown in FIG. 4(b), it is confirmed that the tip of the rod mechanism 3 has been pushed into the ground to a predetermined depth.

Next, as shown in FIGS. 4(b) and 4(c), the water/assimilation material supply device 1, rod drive mechanism 2, etc. are operated to inject the solidification material 4 from the two or four assimilation material 111 injection nozzles 16. At the same time, the outer rod 13 of the rod mechanism 3
While rotating, it is slowly pulled out at a predetermined speed to excavate the surrounding ground and inject the solidifying material 4.

In this case, when the solidifying material 4 is injected from the two solidifying injection nozzles 16, as shown in FIG.
It is constructed in units of linear-shaped hardened bodies 22, each consisting of a wall-shaped hardened body 21 corresponding to the reaching distance of the assimilated material 4 injected from the wall. Further, when the solidifying material 4 is injected from the four solidifying material injection nozzles 16, as shown in FIG.
2 orthogonal according to the reach distance of the assimilated material 4 injected from
A cross-shaped hardened body 25 consisting of one wall-shaped hardened body 24 is constructed as a unit.

At this time, the outer rod F' 13 is rotated to rotate the stirring blade 5.
Since the ground in the upper part of each solidification injection nozzle 16 is stirred by the solidification injection nozzle 16, the injection excavation by the solidification injection nozzle 16 is facilitated, and the assimilated material 4 injected from each solidification material injection nozzle 16 is on the ground surface side. A cylindrical hardened body 23 is formed by stirring this while suppressing overflow.

As described above, in this embodiment, the solidifying material 4 is injected from the solidifying material injection nozzle 16 while rotating the stirring blade 5 to prevent the assimilated material 4 from overflowing to the ground surface, thereby excavating the surrounding ground and preventing the assimilated material 4 from overflowing to the ground surface. 4 is injected, the solidifying material 4 injected from the solidifying material injection nozzle 16 is not wasted, making it unnecessary to dispose of the solidifying material etc. overflowing onto the ground surface, thereby reducing construction costs.

Moreover, since the hardened material 22.25 is formed into a linear or cross shape, it is possible to reduce the amount of injection required to secure a predetermined shape compared to the conventional cylindrical shape, and the hardening material injection nozzle 1
By fixing 6 and injecting and excavating in a fixed direction, the assimilated material 4 is less likely to overflow to the ground surface, and the same improvement effect as the conventional cylindrical shape can be ensured.

FIG. 7 is a front view showing an example of a cured body forming apparatus used in the second embodiment of the cured body forming method according to the present invention.

In this figure, parts corresponding to those in FIG. 1 are given the same reference numerals.

The hardened body forming apparatus shown in this figure is different from the apparatus shown in FIG.
A take-out part 32 for taking out the fluid 3o and a hose 33 for guiding the fluid 3o taken out by the take-out part 32 to the rod mechanism 3 are provided. Each of the injection nozzles 26 is provided, and when the solidification material 4 is injected from each solidification material injection nozzle 16, a fluid 30 such as water or air is injected from each fluid injection nozzle 26 at high pressure.

Therefore, when creating the hardened body 22 or 25 while pulling out the Ut mechanism 3 as shown in FIG. By making a cavity in advance, it becomes easier for the assimilated material 4 injected from the solidified material injection nozzle 16 to fly farther, reducing the amount of wasteful solidified material required for excavating to a predetermined distance, and making it possible to reach a predetermined hardened material. 22 and the cured body 25 can be created as designed.

In this way, in this embodiment, similarly to the above-mentioned embodiment, the solidification material 4 injected from the solidification material injection nozzle 16 is prevented from being wasted, thereby eliminating the need to dispose of assimilated material etc. overflowing to the ground surface. In addition to being able to reduce construction costs, it is also possible to increase the speed at which the rod mechanism 3 is pulled out, thereby shortening the construction period.

No. 1111J is a front view showing an example of a cured body forming apparatus used in the third embodiment of the cured body forming method according to the present invention. In this figure, parts corresponding to those in FIG. 1 are given the same reference numerals.

The hardened body forming apparatus shown in this figure differs from the apparatus shown in FIG. 1 in that a loft mechanism 3b is used instead of the loft mechanism 3.

As shown in FIGS. 12 and 13, the rod mechanism 3b includes an outer rod 35, which is formed into a cylindrical shape and has two notches 34 formed at its lower end outer circumference, and a lower end outer circumference (
Tip! 1), two stirring bodies 36 formed in 1), a rod-shaped inner rod 37 rotatably inserted into the outer rod 35,
Cavity forming material 3 provided on the outer peripheral side of the lower end of the inner rod 37
8, a water injection nozzle 39 provided at the tip of the inner rod 37, two solidifying material injection nozzles 40 provided slightly toward the tip of each cavity forming material 38 of the inner rod 37, and an upper end portion of the inner rod 37. A bearing part 41 provided in the bearing part 41 is provided. Note that the water injection nozzle 39 may be omitted.

The bearing portion 41 is connected to the guide leader 20 of the rod drive mechanism 2.
The national polity is held so that it can slide vertically,
It is equipped with a rotating shaft mechanism, a sliding mechanism, and a locking mechanism provided in this domestic body, and the inner rod 37 can be slid downward by a predetermined distance by the sliding mechanism,
Further, the outer rod 35 is rotatably held by a rotating shaft mechanism.

When the loft mechanism 3b penetrates into the ground,
The inner lot 37 is made rotatable.

As a result, the inner rod 37 is pushed upward due to the resistance when the loft mechanism 3b penetrates into the ground, and each cavity forming material 38 formed in the inner rod 37 as shown in FIG.
When the outer rods 35 are fitted into the notches 34 formed in the outer rods 35 and rotated, the cavity forming material 38 rotates accordingly.

Furthermore, when pulling out the rod mechanism 3b from the ground, the inner rod 37 is locked to prevent it from rotating.

As a result, when the outer rod 35 of the rod mechanism 3b is lifted upward, each cavity-forming material 3
8 is pushed downward, and each cavity-forming material 38 is removed from each notch 34 as shown in FIG. dripping

Next, the 15th [! The method for producing a cured body of this example will be explained with reference to I(a) to FIG. 15(c).

First, when the rod mechanism 3b is to penetrate into the ground, the bearing part 41 is operated to unlock the inner rod 37, and then the rod drive mechanism 2 and the like are operated as shown in FIG. 15(a) to move the rod mechanism 3b. The outer rod 35 is rotated to push the tip of the rod mechanism 3b into the ground. In this case, the water/assimilation material supply device 1 is operated as necessary, and the rod mechanism 3b is not injected from the water injection nozzle 39 or the solidification material injection nozzle 40 of the inner lot 37. It may also be pushed into the ground.

As a result, each cavity forming material 38 fits into each notch 34 of the outer rod 35, and as the outer rod 35 rotates, each stirring blade 35 and each cavity forming 'R38 rotate in the same direction to form these cavities. The ground is loosened by the soil 38 and stirring blades 36.

Next, as shown in FIG. 15(b), when the tip of the loft mechanism 3b is pushed into the ground to a predetermined depth, the pushing of the rod mechanism 3b is stopped.

Then, when the injection nozzle 4° with assimilation of the inner rod 37 faces in a predetermined direction, the operation of the rod drive mechanism 2 is stopped and the rotation of the outer rod 35 is stopped.

Next, the rod drive mechanism 2 is operated to lift the outer rod 35 upward, and the notch 34 formed in the outer rod 35 is removed.
After removing the cavity forming N3B, the bearing part 41 is operated to lock the inner rod 37.

After that, as shown in FIG. 15(c), the water/assimilation material supply device 1, the rod drive mechanism 2, etc. are operated to inject the solidification material 4 from the two solidification material injection nozzles 40, and the rod mechanism 3b While rotating the outer rod 35, it is slowly pulled out at a predetermined speed to excavate the surrounding ground and inject the solidification material 4.

In this case, the outer rod 35 is rotated and the ground is stirred by the stirring material 36, and the solidifying material is sprayed in a fixed direction from each solidifying material injection nozzle 40 of the inner rod 37 while forming a cavity in the surrounding ground by the cavity forming material 38. Since we are injecting 4,
The assimilated material 4 injected from each solidifying material injection nozzle 40 flies farther and effectively excavates the surrounding ground, and is injected into the surrounding ground to form a single-shaped hardened body 22.

In addition, since the outer rod 35 is rotated and the agitation material 36 is used to stir the ground on the one side of each solidification material injection nozzle 40, the solidification material 4 injected from each assimilation injection nozzle 40
As a result of being prevented from overflowing to the surface and being stirred,
Overflowing to the ground surface is suppressed.

In this embodiment, when the rod mechanism 3b is penetrated into the ground, the cavity forming material 38 is fitted into the notch 34 formed in the outer rod 35, and the stirring material 36 provided in the outer rod 35 is inserted into the notch 34 formed in the outer rod 35. The rod mechanism 3b loosens the ground using the hollow forming material 38 provided in the inner rod 37.
Since the tip of the rod mechanism 3b penetrates into the ground, the resistance when the rod mechanism 3b penetrates into the ground can be reduced.

Furthermore, in this embodiment, when pulling out the rod mechanism 3b from the ground, the notch 3 formed in the outer rod 35
At the same time, the injection nozzle 40 with assimilation formed on the inner rod 37 is directed in a predetermined direction and locked.
8, a cavity is created in a part of the surrounding ground, and the assimilated material injected from the solidifying material injection nozzle 40 can be thrown farther, thereby reducing the amount of solidifying material injection required for excavation and assimilating it to a predetermined part. material 4 can be reached.

At this time, the stirring blade 36 is rotated to prevent the assimilated material 4 from overflowing to the ground surface, and the solidified material 4 is injected from the assimilated injection nozzle 40 to excavate the surrounding ground and inject the solidified material 4. Since the injection nozzle with assimilation 4
It is possible to prevent the assimilated material 4 injected from zero from being wasted, and it is also possible to reduce construction costs by eliminating the need to treat solidified material etc. that overflow onto the ground surface.

In addition, in this embodiment, excavation of the ground and injection of the solidifying material 4 are performed using two cavity forming materials 38 and two injection nozzles 40 with assimilation. The cruciform hardened body 25 may be created by using four assimilation injection nozzles 40 and four assimilation injection nozzles 40.

Furthermore, in each of the embodiments described above, the liquid assimilation material 4 is injected from the assimilation injection nozzle 16.40, but if it is a fluid that solidifies the ground, it may be a liquid such as water or cement. A powder, a gas such as a gas, or a mixture thereof may be injected.

Further, in the above embodiment, when the rod mechanism 3.3b is pulled out from the ground, the rotation of the inner rod 14.37 is prohibited to form the -7 shaped hardened body 22 or the cross shaped hardened body 25. However, when pulling out the rod mechanism 3.3b from the ground, the inner rod 14 along with the outer rod 13.35
．． 37 may be rotated to form a cylindrical hardened body with a large diameter.

In this case, a fluid injection nozzle is formed between the assimilation injection nozzles 16.40 formed on the inner rod 14.37, and fluid such as water or air is injected at high pressure from each of these fluid injection nozzles to the ground. Solidifying material injection nozzle 16 forming a cavity
．． The solidifying material 4 that is injected at the same time may be made to fly further.

[Effects of the Invention] As explained above, according to the method for creating a hardened body of the present invention, it is possible to prevent the solidifying material, etc. injected into the ground from overflowing to the ground surface, thereby eliminating waste of the solidifying material, etc. , construction costs can be reduced by eliminating the need to treat assimilated materials that overflow onto the ground surface.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a cured body forming apparatus used in the first embodiment of the cured body forming method according to the present invention, and FIG. 2 is a partially cut-away front view showing the tip of the rod mechanism shown in FIG. Figure 3 is a bottom view showing the tip of the rod mechanism shown in Figure 1, and Figures 4 (a) to (c) are schematic diagrams showing examples of formation using the hardened body creation apparatus shown in Figure 1. 5 is a schematic diagram showing an example of a cured body to be produced, FIG. 6 is a schematic diagram showing another example of a cured body to be produced, and FIG. 7 is a second diagram of the method for producing a cured body according to the present invention. A front view showing an example of the hardened body forming apparatus used in the examples, FIG. 8 is a partially cutaway front view showing the tip of the rod mechanism shown in FIG. 7, and FIG. 9 is a front view showing the a-rad mechanism shown in FIG. 7. FIG. 10 is a schematic diagram showing an example of forming a cured body using the apparatus for producing a cured body shown in FIG. Front view showing an example of a cured body forming apparatus, first
Figure 2 is a partially cutaway front view showing the tip of the rod mechanism shown in Figure 11, Figure 13 is a bottom view of the tip of the rod mechanism shown in Figure 1, and Figure 14 is shown in Figure 11. Front view showing an example of operation of the tip of the rod mechanism, FIG. 15(a)
-(c) are schematic diagrams showing examples of construction using the hardened body construction apparatus shown in FIG. 11, and FIG. 16 is a front view showing an example of a conventionally known excavation equipment. 1...Water/assimilation material supply device 2...Rod drive mechanism 3 ・ Medium 4 ・ ・ 5 ・ ・ 16 ・ 22 fists 25 φ ・ Lot mechanism ・ Fluid (assimilation material) ・ TGT 1 On the rod [ ・High-pressure injection part (solidifying material injection nozzle) - shaped hardened body cross-shaped hardened body

Claims (1)

[Claims] (1) In a hardened body construction method in which a rod mechanism is penetrated into the ground and a predetermined fluid is injected to form a hardened body in the ground, the rod mechanism is installed on the side of the tip while it is penetrated into the ground. The rod mechanism is pulled out at a predetermined speed by injecting the fluid in a predetermined direction from a high-pressure injection part, and while excavating the ground around the tip, rotating a stirring blade installed slightly above the high-pressure injection part. A method for creating a hardened body, characterized by forming a hardened body in the ground.