JP3323552B2 - Underground wall formation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a wall such as a soil cement wall in the ground.

[0002]

2. Description of the Related Art Various methods have been known as methods for improving the ground or forming a wall, and improvements have been made actively.

[0003] For example, considering the case of forming a soil cement wall, in the past, a single-axis earth auger machine was used.
While the soil cement piles were formed one by one, and continuous walls were formed while wrapping them, in recent years, with a multi-axis earth auger machine, soil cement walls of a certain length were formed, Thereafter, a wrap is held and straddled on an adjacent soil cement wall to form a soil cement wall, and a completely continuous soil cement wall is formed. In any case, as long as the earth auger machine is used, the plane shape of the wall is a skewered dango shape.

[0004] Further, when constructing this kind of soil cement pile or wall, stirring and mixing of the in-situ soil and the cement-based material are performed by rotation of an earth auger. There is no idea to fill or replace the conductive filler.

[0005]

However, if the wall to be formed has a skewered dango-like plan view, the valley on the flat surface will have poor water blocking properties. The same is true.

[0006] The strength and homogeneity of the soil cement pile or wall are related to how homogeneously the soil and the cement are agitated and mixed. However, as in the past, only the rotation of the earth auger is used. In such a case, it is difficult to improve the strength and homogeneity of the pile or wall.

[0007] Accordingly, the main object of the present invention is to provide a water barrier.
Was excellent in sex, yet to provide a reclamation apparatus walls which can be obtained that the strength of the wall and excellent high and homogeneity.

[0008]

Means for Solving the Problems] The present invention which has solved the above problems, with stirring function and the pushing force by an excavator with a stirring blade, in the subject ground, penetrate while relaxing soil, solidifying in the ground An apparatus for forming a wall body with a filler, a plurality of adjacent rotary drive longitudinal axes, horizontal rotary blades integrally projecting in a horizontal direction at the tip side of each of the rotary drive longitudinal axes, A vertical axis holding means for penetrating each of the rotary driving vertical axes and holding them in a state of maintaining parallelism, and a line connecting the axis of the both rotary driving vertical axes held with respect to the vertical axis holding means; At both side positions, a pair of parallel rotating abscissas extending horizontally, vertical rotating blades protruding from these rotating abscissas, and the rotational force about the ordinate of the rotary drive ordinate are applied to the horizontal And a transmission mechanism that transmits torque as a rotational force around the axis. The trajectory drawn by each of the horizontal rotating blades is separated from each other, and the trajectory drawn by each of the vertical rotating blades on the one rotating horizontal axis and the trajectory drawn by each of the vertical rotating blades on the other rotating horizontal axis are substantially the same. It is an object of the present invention to provide a submerged wall forming apparatus characterized by being in contact with each other.

On the other hand, the second horizontal rotary blades are integrally provided in the horizontal direction on the base side of the horizontal axis of rotation of each rotary drive longitudinal axis, and are protruded from the ground. Is also provided.

[0010]

According to the present invention, the excavator penetrates the ground while relaxing it by adding water as necessary. When the excavator is lifted up to a predetermined depth and solidified filler is pressed into the ground from its tip, the ground has been relaxed in advance, and part of the loosened ground is discharged as ground. It is pushed up to. As a result, the area of the ground where the excavator relaxes is replaced with the solidifying filler, and a wall of the solidifying filler is formed in the ground.

Therefore, compared with the case where the cement and the in-situ soil are simply stirred and mixed, since the cement is replaced by the solidifying filler, a material having high strength can be easily obtained, and the uniformity can be improved. It can be excellent.

On the other hand, by using the device of the present invention,
By the operation described later, it was made to have excellent water shielding , and
A wall having high strength and excellent homogeneity can be easily formed.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. First, the structure and operation of an apparatus suitable for implementing the method of the present invention will be described with reference to FIGS.

Reference numerals 1A and 1B denote adjacent rotary drive ordinates, and horizontal rotary blades 2A and 2B are provided on the tip side of each of the rotary drive ordinates 1A and 1B so as to protrude integrally in the horizontal direction. As shown in FIG. 4, the horizontal rotating blades 2A and 2B are inclined with respect to a plane, and have a bit 2a on the lower side.

In the portion above the horizontal rotary blades 2A and 2B, the rotary drive longitudinal axes 1A and 1B are
A, 3B, the casings 3A, 3B
Are connected by horizontal members 4 and 4. Here, the casings 3A, 3B and the horizontal members 4, 4 constitute the vertical axis holding means of the present invention. As shown in FIG. 1, the rotational drive longitudinal axes 1A,
1B is connected by horizontal members 41 and 42 (42 is not shown). Thereby, each rotation drive longitudinal axis 1A, 1
The parallelism of B is ensured.

On the ground, a guide mast 5 for pushing the apparatus down and into the ground is erected, for example, while being held by a crawler type base machine (not shown). , 1B is lowered via the horizontal member 42 by driving by the feed motor 10 moving along the rail 5a.

On the other hand, on both sides of a line connecting the axes of the rotational drive longitudinal axes 1A and 1B, there are disposed horizontal transverse axes 6A and 6B which extend horizontally with respect to FIG. Vertical rotating blades 6a protrude from the rotating horizontal shafts 6A and 6B.

The rotating horizontal shafts 6A and 6B are rotatable via bearings (not shown) by means of vertical axis holding means, specifically gear boxes 7A and 7B protruding from the sides of the casings 3A and 3B. Is held. Further, the rotating horizontal shafts 6A, 6A
Even in the part extended from B gear box 7A, 7B,
Second rotating horizontal shafts 60A and 60B are provided, and vertical rotating blades 60a are similarly formed.

The rotary drive longitudinal axes 1A and 1B are rotated by rotary drive motors 8A and 8B fixed to the horizontal member 42, and the rotational force about the vertical axes is about the horizontal horizontal axes 6A and 6B. The torque is also used by the transmission mechanism 9 as a rotational force. This transmission mechanism 9 is, as shown in FIG.
A worm 91 fixed around the rotary driving longitudinal axis 1A or 1B and a worm wheel 92 fixed around the rotating horizontal axes 6A and 6B are meshed with each other. The transmission mechanism may be a combination of a rack and a pinion.

When the rotary drive motors 8A and 8B rotate the rotary drive longitudinal axes 1A and 1B counterclockwise and clockwise as viewed in plan, respectively, the horizontal rotary blades 2A and 2B rotate in the same direction. And the worm 91 and the worm wheel 92 rotate the
A and 6B are rotated in the directions shown in FIGS. The trajectory Y drawn by the periphery of each of the vertical rotating blades 6a of the rotating horizontal shafts 6A and 6B is substantially in contact with each other as shown in FIG. 5, while the periphery of each of the horizontal rotating blades 2A and 2B is drawn. The trajectories X are separated as shown in FIG.

With such equipment, as shown in FIG. 1, the excavator is installed at a target location, and the driving motors 8A and 8B rotate the driving longitudinal axes 1A and 1B while applying a pushing force by the feeding motor 10. Excavation is performed by the excavation bits 11A and 11B at the tip. Eventually,
When the horizontal rotating blades 2A and 2B come into contact with the ground, they excavate and stir the ground. When further digging, the rotation horizontal axes 6A and 6B and the second rotation horizontal axis 60
A and 60B contact the ground, thereby excavating and stirring the ground. From this stage, the ground is excavated in a horizontally long rectangular shape in plan view.

The ground penetrates to a predetermined depth while relaxing the ground by excavating and stirring the ground. After reaching the predetermined depth, lift the excavator. In this lifting process, the rotary drive longitudinal axes 1A and 1B are preferably rotated, and thus the horizontal rotary blades 2A and 2B, the rotary horizontal axes 6A and 6B, and the second rotary horizontal axes 60A and 60B are also rotated.

In the process of lifting the excavator, the rotary drive longitudinal axis 1
Solidification filler M, for example, a cement-based material is press-filled into the ground through discharge ports 12A and 12B formed at the tips of A and 1B. In this case, since the ground has been relaxed in advance, a part of the relaxed ground is sequentially pushed up to the ground as earth removal S. As a result, the area of the ground where the excavator relaxes is replaced with the solidifying filler, and a wall W made of the solidifying filler is formed in the ground as shown in FIG. When the solidifying filler M is discharged from the discharge ports 12A and 12B,
As shown in FIG. 1, the solidifying filler M is ejected while covering a certain depth.

In this case, the cement-based solidifying material m is added to the soil S and mixed by the mixer 13 to obtain a mixed soil, which is supplied to the rotary drive longitudinal axes 1A and 1B by the pressure pump 14. Therefore, it is preferable to discharge as the solidifying filler M. Therefore, the formed wall W is a soil cement wall. In addition to soil cement,
Cement mortar walls can also be created, in which case there is no need to mix with the in situ soil.

In the present invention, excavation without excavation is basically performed.
However, strictly speaking, the in-situ soil is discharged to the extent that it has relaxed.
During excavation, water is preferably added. The addition of water can be performed by causing water to flow out from the discharge ports 12A and 12B. This water hydration firstly reduces the resistance to excavation and enables a mud column with a large cross section to be created with low power.
Third, the cement-based solidified material m by the mixer 13 is easily replaced with a solidifying filler because the fluidity is increased.
And the earth removal S, and the pumpability of the mud after kneading by the pumping pump 14 is improved.

If necessary, the excavator may be lifted up and down while raising the excavator up and down so as to improve the mixing property with the in-situ soil. On the other hand, as shown in FIG.
The second horizontal rotating blades 20A (not shown) and 20B may be provided on the base side of A and 6B.

With respect to the wall W thus formed, FIG.
As shown in (1), a continuous wall body is formed by forming another wall body adjacent to the wall body, and can be used as a water impervious wall or the like.

[0028]

As described above, according to the present invention, the formed
The wall body becomes excellent in the water shielding property, and the wall body having high strength and excellent in homogeneity can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view of a lifting process after excavation according to the present invention.

FIG. 2 is a plan view of the formed wall.

FIG. 3 is a plan view of the excavator.

FIG. 4 is a front view of a main part of the excavator.

FIG. 5 is a right side view of a main part of the excavator.

FIG. 6 is an explanatory diagram of a transmission mechanism.

[Explanation of symbols]

1A, 1B ... rotational drive vertical axis, 2A, 2B ... horizontal rotary blade, 6A, 6B, 60A, 60B ... rotary horizontal axis, 12A,
12B: discharge port, M: solidifying filler, m: cement solidifying material, S: earth discharging.

Claims (2)

(57) [Claims] 1. A with stirring function and the pushing force by an excavator with a stirring blade, in the subject ground, while relaxing the ground penetrating, an apparatus for reclamation of the wall by solidifying filler into the ground, A plurality of adjacent rotary drive longitudinal axes, horizontal rotary blades integrally protruded in the horizontal direction on the tip side of each of the rotary drive longitudinal axes, and each of the rotary drive longitudinal axes penetrate and parallelize them. And a pair of parallel rotating shafts extending horizontally at positions on both sides of a line connecting the axes of the two rotational drive longitudinal axes, which are held by the longitudinal holding means. Shafts, vertical rotation blades protruding from these rotation horizontal axes, and a transmission mechanism for transmitting the rotation force about the vertical axis of the rotation drive vertical axis as the rotation force about the horizontal axis of each rotation horizontal axis. The trajectories drawn by the peripheral edges of the horizontal rotating blades are separated from each other. Wherein the trajectory drawn by each vertical rotating blade periphery of the one rotating horizontal axis and the trajectory drawn by each vertical rotating blade periphery of the other rotating horizontal axis are substantially in contact with each other in the ground. Wall building equipment. 2. A rotary driving device according to claim 1, further comprising:
2. The apparatus according to claim 1, wherein the second horizontal rotary blades are integrally provided in the horizontal direction.