JPH01250522A - Auger machine having forced agitation device - Google Patents

Abstract

PURPOSE:To perfectly mix a structure with earth or the like, by fitting an agitating wing loosely on a screw rod pipe having a screw head at the lower end, and by executing the crushing of an underground structure or the like with the head and the mixing of the crushed one with cement milk to be agitated. CONSTITUTION:When a casing 1, a screw 2, and a screw head 3 are reversely rotated and are moved downward and a slot is bored through, then by the casing 1 and the head 3, an underground structure X is destroyed. At the same time, when cement milk is injected from the jet port or the like of the head 3, then the destroyed structure X, earth at the time of boring the slot, and the cement milk are agitated with each other in the casing 1 by an agitating wing. After that, when the casing 1, the screw 2, and the head 3 are pulled out, then a soil column Y is formed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an auger machine used in civil engineering work.
In particular, the fill column has a forced stirring device.

It is characterized in that it is effective for the construction of other underground pile-like bodies. is equipped with a high-pressure cement milk injection port directed horizontally and diagonally downward, rotates the casing and auger head in opposite directions, and drills the hole to a predetermined depth while injecting cement milk at high pressure. A soil column construction method (see Japanese Patent Application No. 62-254844) has been proposed in which the columns are continuously pulled out and stressed materials are erected as needed.

[The problem that the invention attempts to solve]

The above-mentioned soil column construction method involves leaving the underground structure as it is and drilling a hole using a drilling machine that has the ability to destroy the underground structure.
Next, the fill column is constructed, and extremely economical effects such as shortening of construction period can be obtained.

However, in cases where there are pine piles as an underground structure or in the case of a clay layer, stirring and mixing with cement milk may not be carried out sufficiently.

In other words, pine stakes are a fibrous material and may not be finely crushed by the auger head.

In addition, in the case of clay, although it is easily crushed, it sometimes sticks together again and does not mix well with cement milk.

This is because they simply have an auger head screw installed inside the casing, so there is a natural limit to the mixing of destroyed underground structures, earth and sand with cement milk.

The destroyed underground structure, soil and cement milk are incompletely mixed with the soil column.

Furthermore, this resulted in the creation of an incomplete continuous wall, making it impossible to obtain sufficient strength and water-stopping effects.

The present invention has been made in view of the above-mentioned problems, and its purpose is to completely mix cement milk, earth and sand, as well as destroyed underground structures, by sufficient stirring, and The idea is to break the construct into smaller pieces to achieve thorough mixing.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention has a structure in which a stirring blade is loosely fitted into an appropriate position of the screw rod of an auger machine, and the tip of the stirring blade is engaged with a casing.
Still another invention is that both sides of the stirring blade are configured in the shape of a cutting edge.

[For production]

In the present invention, the casing I11, the screw (2), and the "screw head (3)" are rotated in the opposite direction and lowered to perform drilling.

i.e. casing II) and screw head (3
), the underground structure (X) is destroyed and drilling is performed.

At the same time, the injection port (3b) provided in the screw head 13)
Cement milk etc. are injected from etc. As a result, the destroyed underground structure, earth and sand from drilling, and cement milk are stirred within the casing f11.

In the present invention, in addition to stirring by the casing 11) and the screw +21 as in the prior art, the stirring blade (4) is rotated in the same direction as the casing (1).

That is, the stirring blade (4) is rotated in the opposite direction to the screw (2) around the rod pipe (2h) of the screw (2), and sufficient stirring is performed to remove the destroyed underground structures, earth and sand, and the injected soil. Complete mixing of cement milk is carried out.

Furthermore, when both sides of the f stirring R (4) are shaped like cutting edges, the underground structures 2, such as pine piles, which are insufficiently destroyed, are crushed even more finely, and the mixing becomes complete.

It can be used to construct fill columns with excellent strength and water-stopping effects, other underground pile-like bodies, and continuous walls.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In addition, in one drawing embodiment, the main part, ie.

Only the casing (1), screw 121 and screw head (3) are shown, and the auger machine body that supports them and lowers and reverses them relative to each other is omitted.

The lower end of the above casing "1" has an ultra-tensile steel chip (1α
), and the screw (2) is composed of a screw blade (2a) and a rod pipe (2b), and
The screw head (3) also has super tensile steel tips (
3α) is provided, and a cement milk injection port (
3h) is provided.

In the present invention, as shown in Ikki 1, the rod pipe (2α)
A stirring blade (41) is loosely fitted into the appropriate position of the blade.To be more specific, as shown in Figures 2 and 3.

The stirring blade (4α) (4b) is manufactured by dividing the receiving portion 15) of the rod pipe (2b), which is configured to have a margin with respect to the diameter of the rod pipe (2a), into two parts.

Brackets (6) are welded to each joint.

Connect the bracket (6) part to the bolt (7) by joining from both sides of the narrow part formed in advance on the rod pipe (2h).

They may be integrated with a nut (8) or by welding.

Note that the stirring blade C41 is not limited to the above two directions, but can be used in one direction,
They may be provided in three or four directions (cruciform).

Next, the tip of the stirring blade (4) is connected to the casing ill.
engaged with.

In the case of the embodiment shown in the drawings, a keyway-shaped engagement recess (9) is provided at the center of the tip of the stirring blade (4), and a key-shaped engagement recess (9) is provided on the inner peripheral surface of the casing fil facing the engagement recess (9). stopper (1
Setting 0) engages the two.

Therefore, the stirring blade r41 is provided integrally with the casing (1), and the rod pipe (2) of the screw 121 is provided integrally with the casing (1).
b) is rotated in the opposite direction to the screw (2).

The above-mentioned stirring blade R41 literally has a stirring function, but if both sides of the stirring blade are formed into a cutting edge shape (11), it can effectively cut fiber materials such as pine piles and crush them into small pieces. This provides the effect of more complete mixing with cement milk.

In the figure (12) is a stirring blade fixed to the rod pipe (2b).

Figure 4 shows the stirring blade (4) of the present invention as a screw blade (2α
) is provided with an appropriate interval between them.

Figure 5 shows the stirring blade (12) fixed to the rod pipe (2h).
) is an example in which the stirring blade (4) of the present invention is provided between.

Figures 6 (α) to (C) show the construction process of the soil pillar (2) of the soil pillar row construction method.

To explain below, first, as shown in the same figure (α), the casing (1), the screw (2), and the screw head (3) are reversely rotated and lowered to start drilling.

``When this drilling starts, cement milk is injected from the injection port (3b) provided in the screw head (3).

The above-mentioned drilling is continued by destroying the amount of underground structures, as shown in Figure (b).

In this process underground structures are destroyed.

Sediment and cement milk are stirred in casing Ill.

In the present invention, the above-mentioned stirring is performed by the casing (1), the stirring blades 14) rotating together with the casing rll, and the screw (2) rotating in the opposite direction thereto.

Therefore, unlike the conventional method, sufficient stirring is possible within the casing rll, and complete mixing is achieved.

Thereafter, as shown in the same figure (C), the casing C1), the screw (2), and the screw head (31 is pulled out, and the fill column V) is constructed. Furthermore, after that, the fill columns (2) are arranged at appropriate intervals, and the space between them is further continued by soil columns to form a continuous wall.

In the structure of the soil column (2), the present invention is provided with a stirring blade f4) that is integrally provided with the casing fil and rotates in the opposite direction around the rod pipe (2b) of the screw (2). The structure, earth and sand, and cement milk are sufficiently stirred and completely mixed, and a fill column (2) having the desired strength and further a continuous wall can be constructed.

In addition, by providing stirring blades (12) on the rod pipe (2h) side and using them in combination, the mixing effect will be further enhanced.Furthermore, if both sides of the stirring blades (4) are shaped like cutting edges, the destroyed underground The mixing effect can be enhanced by crushing the construct (X) etc. into smaller pieces.

〔Effect of the invention〕

According to the present invention, it is possible to completely mix destroyed underground structures, earth and sand, and cement milk, and it is possible to completely mix soil columns, other underground pile-like bodies, and even continuous walls that have the targeted strength and water-stopping effect. can be configured.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a vertical sectional view of a partially cutaway main part, Fig. 2 is a sectional view taken along the line A-A of Fig. 1, and Fig. 3 is a sectional view of the main part.
The figure is a perspective view of a stirring blade, the tooth 4 figure is a longitudinal sectional view of a main part showing another embodiment, and the fang 5 figure is a main part longitudinal sectional view showing still another embodiment. , Figure 6 (α), (b), and (C) are longitudinal cross-sectional views showing the process of constructing column rows using the soil column row construction method. If)...Casing, +21...Screw, (
2α)...Screw blade, (2h)...Rod pipe. (3)... Screw head, C4)... Stirring blade,
(44) (4b)... Stirring 1.191... Engagement concave hole, (10)... Stopper, (11)...
Cutting edge shape. 1 illustration spear 2 illustrations 4 illustrations 5 illustrations

Claims (1)

[Scope of Claims] 1. An auger machine having a forced stirring device, characterized in that a stirring blade is loosely fitted into a proper position of a rod pipe, and the tip of the stirring blade is engaged with a casing. 2. An auger machine having a forced stirring device according to claim 1, wherein both sides of the stirring blade are configured in the shape of a cutting edge.