JPS5938419A - Method and apparatus for agitating ground - Google Patents

Abstract

PURPOSE:To uniformly mix soil and sand with a solidifying agent by a method in which a vertical agitating blade is fixed orthogonally to a horizontal rotary shaft provided to a rotary shaft, and the agitating blade is turned around its axis while horizontally turning the horizontal rotary shaft around the rotary shaft. CONSTITUTION:When a rotary shaft 1 is turned and a solidifying agent is injected, the ground is excavated by a drill bit 2 and a small drill blade 3, raked up by an excavating blade 4, and mixed with the solidifying agent. On the other hand, horizontal rotary shafts 14 and 15 are horizontally turned with a gear case 10 around the shaft 1 as the shaft 1 turns. In this case, a rotary resistance plate 13 does not turn by the resistance with the surrounding ground and also the main bevel gear 11 does not turn. Follow bevel gears 16 and 17 turn in the direction of arrow, the horizontal rotary shafts 14 and 15 rotate around its axis in the direction of arrow while revolving horizontally around the shaft 1, and the vertical agitating blade 18 turns on the vertical face.

Description

DETAILED DESCRIPTION OF THE INVENTION When improving soft ground, the present invention involves stirring and mixing a hardened phase such as Shichiment with local soil using a blade, solidifying it, and forming fill cement piles or noil cement column piles. The present invention relates to a method of stirring the ground and an apparatus for the same, which is used when creating a ground.

For soft, viscous soil with high water content and organic soil, consolidation is achieved by stirring and mixing the hardening phase of cement, etc., with earth and sand in the field underground. ) It is extremely superior in terms of fast construction speed and low cost.

However, what is important about this construction method is that the curing agent and the earth and sand are uniformly stirred and mixed so that the initial strength is developed. However, regardless of the shape, conventional devices simply have stirring blades protruding from the rotating shaft, so the top of the hole may stick to the stirring blades, especially for cohesive soil.
The miscibility with the hardening phase decreases, and in severe cases, the top of the field plate causes a so-called co-rotation phenomenon with the stirring blade within the rotation range of the 4' upper stirring blade, and the hardening material and the hole inside the hole are not mixed at all. There is also.

The present invention solves these problems at once, and its purpose is to provide a method and device for stirring the ground that is extremely excellent in stirring and mixing properties and uniformly mixing field soil and hardening material. It is in.

To achieve this objective, the method of the present invention provides a rotating shaft with a horizontal rotating shaft, fixes a vertical stirring blade orthogonally to the horizontal rotating shaft, and horizontally rotates the horizontal rotating shaft around the circumference of a rotating shaft. The idea is to create a configuration that allows the device to rotate itself around its axis while moving the device.

In addition, the device of the present invention has a main umbrella 1′ and a
A H wheel is arranged, and this is made into a non-rotating bar due to the resistance with the pair 2i'')ig board, a horizontal rotating shaft 1) is arranged perpendicular to the rotating shaft, and the main umbrella is attached to this horizontal rotating shaft. The driven gear that meshes with the gear is fixed, and the vertical stirring blade is fixed,
As the rotation/yaft rotates, the horizontal rotation shaft horizontally revolves around the rotation/yaft, and the rotation shaft itself can rotate five times around its axis.

That is, the present invention attempts to use vertical stirring in combination with the conventional horizontal stirring alone (in view of the fact that sediment adheres to the horizontal stirring blades and the stirring and mixing properties are significantly reduced).

In the following, the present invention will be explained by way of a specific example.
is a rotation/yaft, and the earth-o is connected to a machine or drilling machine, etc., and the rotational driving force of its horn causes it to rotate clockwise when viewed from above. At the tip of the rotating shaft 1, there is a drilling bit 2 and an IJ with a shining surface.

A set of small perforated blades 3 are provided in the same U. Above the perforation blade 3, there is a screw I whose lower edge is located on the Ai1 side of the transmission direction.
J, a set of digging blades 4 rotates 71 rpm! Fixed to -1! ,. Furthermore, the upper direction 1r'4. The drilling blade 4
A four-circle plate shape with opposite twisting direction., -i% l Water stirring blade (5!5 is fixed to rotating/yaft 1.

Furthermore, on the two sides, a second horizontal stirring blade G whose upper edge is located forward in the transmission direction is fixed to the rotating/yaft 1.

On the other hand, a horizontal/vertical stirring mechanism A, which is a feature of the present invention, is provided at a position between the first horizontal IW stirring blade 5 and the second horizontal jλ dowel blade 6. i.e. rotating shirt)
A gear case 10 is disposed around the rotating/yaft 1, which is connected to the rotation of the gear I, and a main bevel gear 1 is disposed inside the gear case 10.
This main bevel gear 11 is provided around the rotating shaft 1 via a bearing (not shown). z) Support 1' edge cut through r
Four rotation resistance plates 13 are integrally formed on this support body 12 and project outwardly in the circumferential direction.

Rotation 7 Yaft 1 and 7α and gear case tOj
Through xM, the 1st horizontal round (den 4i1) 14 and the 2nd horizontal round
1711 huge fi <・circle 1115 are arranged, and a bearing CL'Iff J') is arranged at the insertion part 1'L1 inserted into the base Nobe Kaisho 7 Yaft 1. Both horizontal rotating shafts], 4, 15 (・'ko・ri, respectively, the first subordinate umbrella wheel 16 and the second subordinate gear 17 are integrated, and furthermore, the subordinate gears 16 and 17 are integrated. 'r case 1
0 and is engaged with the main bevel gear 11 in a dog-like position. In addition, a vertical stirring shaft 18A with an illuminated surface is fixed to both horizontal rotating shafts 14 and 15 perpendicularly thereto, and a small stirring blade 18B extending horizontally in an illuminated surface is fixed to this, @direct stirring blade 18 is configured.

When improving soft ground using a ground stirring and mixing equipment with such a configuration, 1. ``First, the rotary shaft 1 is rotated by a driving device for drilling, and a hole is drilled to a predetermined depth while applying a pressing force to the rotary shaft 1. Its omission-
Aim for 1 or 2.

Here, during drilling, up to 1 ton of earth and sand from the target ground is scraped by the drilling bit 2 and the small drilling blade 3, and is mainly scraped upward by the drilling blade 4. At this time, since the first horizontal stirring blade 5 is twisted in the opposite direction, it acts to suppress the soil being stirred up.

The rotary shaft 1 is made hollow in advance, and hardening fluid such as cement liquid is pumped from the ground through it, and this is injected from the rotary shaft or blades during drilling and when pulling up the slag. . This allows the excavated earth and sand to come into contact with the hardening material, while each blade mixes and solidifies the material.

On the other hand, as described above, if only the horizontal stirring blades are used, co-rotation occurs and the stirring and mixing properties are poor. In the present invention, when the rotating shaft 1 is rotated, the horizontal rotating shafts 14 and i5 horizontally rotate around the rotating shaft 1 together with the gear case 10. At this time, the rotation resistance plate 13 is restrained by the surrounding earth and sand and does not rotate because it is separated from the rotation of the rotating shaft 1, and as a result, the main bevel gear 11 also does not rotate. therefore,
The first and second subordinate bevel gears 16 and 17 that mesh with the main bevel gear 11 rotate in the direction of the arrow shown in the figure as the rotating shaft 1 rotates clockwise, and accordingly, the first and second horizontal rotating shafts 1
4.15 horizontally revolves around the circumference 9 of the rotating shaft 1 while rotating around its axis in the direction of the arrow shown in the figure. As a result, the vertical stirring blades 18 rotate on a vertical plane.

By the operation of the horizontal and vertical stirring mechanism A, the excavated earth and sand that is scraped up from below and suppressed from above and around the circumference of the horizontal and vertical stirring mechanism A is stirred both horizontally and vertically at the part of the stirring mechanism A. receive. Therefore, a shearing action is applied to the earth and sand, and its movement to form agglomerates adhering to the blades is interrupted. As a result, the earth and sand come into contact with the injected hardening material evenly, resulting in a homogeneous, solid soil cement pile or fill cement column pile.

FIGS. 3 and 4 show examples of different aspects, and the excavating blade 4
A conduit 20 communicating with the rotating shaft 1 is provided, and a hardening material injection nozzle 21 for cement slurry or the like is attached to the conduit 20 facing the first horizontal stirring blade 5. A conduit 22 is provided to the second horizontal stirring blade 6, and a conduit 22 is provided to the second horizontal stirring blade 6. The hardening material injection nozzles 23 are attached facing the vertical stirring blades 18, and the hardening material is injected from each nozzle 21.23 at a high pressure of 30 to 400 Kf/cm2, and at the same time the hardening material is injected into the earth and sand, the corresponding blade 5.18 This is to prevent soil from adhering to the surface. In the example above, the hardening material was injected at high pressure, so
This is extremely suitable because it not only improves the ability to stir and mix the earth and sand, but also prevents the earth and sand from adhering to the blades. Note that, if necessary, high-pressure projection of the hardening material may be applied to other blades as well.

As described above, since the present invention performs vertical agitation as well as horizontal agitation, it is possible to reliably prevent rotation of the blades 5 due to adhesion of earth and sand, thereby making it possible to create a homogeneous and high-strength pile.

[Brief explanation of drawings]

FIG. 1 is a front view of the first example, FIG. 2 is a plan view thereof, FIG. 3 is a front view of the second example, and FIG. 4 is a plan view thereof. 1...Rotating shaft, 10...Gear case, 11.
・・Main bevel gear, 13・Rotation resistance plate, 14.15・・
・Horizontal rotation axis, 16.17... Follower gear, 18...
Vertical stirring blade, 21.23... hardening material injection nozzle. Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A rotating shaft is provided with a horizontal rotation shaft, a vertical stirring blade is fixed perpendicularly to the horizontal rotation 1111+, and while the horizontal rotation shaft is horizontally rotated around the rotation shaft, the shaft itself is rotated around its axis. A ground stirring method characterized by: (2) A main bevel gear is arranged around the rotating shaft so that it does not rotate due to resistance with the target ground, and a horizontal rotating shaft is arranged perpendicular to the rotating shaft, and the horizontal rotating shaft 11+ is connected to the above-mentioned A subordinate bevel gear that meshes with the main bevel gear is fixed, and a vertical stirring blade is fixed, and as the rotating shaft rotates, the horizontal rotating shaft revolves horizontally around the rotating shaft, and the horizontal rotating shaft itself revolves around the rotating shaft. A ground stirring device that is characterized by being able to rotate around it.