JPS6111315Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an underground wall construction stirring mixer for forming an underground wall using a soil hardening agent.

The present applicant has already discovered that as a method suitable for constructing a basement in particular in soft ground, a columnar hole is excavated while the internal soil is stirred, and at the same time, the soil and a soil hardening agent are mixed to form a column in the ground. At the same time, adjacent columns partially overlap each other to form a row of columns defining the periphery of the basement to be formed, and this row of columns hardens to form a column underground. We have proposed a method (Japanese Patent Application No. 183736/1983) of forming a basement by digging roots inside the underground wall after it becomes a wall.

The present invention was made for the purpose of obtaining a suitable device for carrying out this method, and the main frame body has a pair of left and right endless tracks, and is moved up and down by a hydraulic cylinder device and is driven to rotate. A plurality of stirring rods are arranged in parallel in the running direction, and adjacent stirring rods are rotated in different directions, and the soil hardening agent is discharged from the discharge ports of stirring blades that are provided below the stirring rods and protrude in a radial direction. By ejecting the stirring rod and appropriately setting the height position and length of the stirring blades of adjacent stirring rods, it is possible to obtain an underground wall consisting of a column row in which adjacent column bodies partially overlap. It is characterized by

The invention will now be described with reference to the illustrated embodiments. The main frame 1 in the form of a portal canine is movable on endless tracks 2, 2 provided on the left and right sides of its lower end, and its length L in the running direction is set larger than its width W. A pair of hydraulic cylinder devices 3 are erected at the front and back of the upper end of the main frame 1, and at the lower end of the downwardly projecting piston rod 4 is a support base 5 which is flat and located at the center of the main frame in the width direction. is supported in suspension. Therefore, the support base 5 moves up and down by supplying and discharging pressure oil to the hydraulic cylinder device 3. In this example, the hydraulic cylinder device 3 directly suspends and supports the support base 5 in a vertically movable manner, but the main frame 1 may be provided with a vertical movement guide for the support base 5. Of course, the supply and discharge of pressure oil to a pair of hydraulic cylinder devices 3 or a larger number of hydraulic cylinder devices 3 is controlled so that all piston rods 4 move at the same speed and height, so that the support base 5 does not tilt. .

A hydraulic motor 6 and a hydraulic unit 7 are mounted and fixed on this support base 5.
The hydraulic unit 7 is a hydraulic motor for the endless tracks 2, 2,
It supplies and discharges pressure oil to and controls the hydraulic cylinder device 3 and the hydraulic motor 6. On the other hand, on the lower surface of the support base 5, a plurality of stirring rods 8, four in this embodiment, are suspended via swivel joints 9 and are rotatably supported in parallel in the running direction. The hydraulic motor 6 is used to rotate the stirring rod 8, and is connected to the stirring rod by a gear mechanism disposed within the support base 5.

Below the stirring rods 8, stirring blades 10 are arranged in series, each projecting in the radial direction. This stirring blade 10 excavates and stirs the ground by rotating the stirring rod 8, and at the same time mixes a milky soil hardening agent into the stirred soil, so it has a plurality of discharge ports at different radial positions. 11 is opened. This discharge port 11 communicates with a soil hardening agent pressure pump 13 outside the stirring mixer via a stirring blade passage, a shaft passage of the stirring rod 8 (both not shown), a swivel joint 9, and a high-pressure flexible hose 12. ing. A similar lower end portion 14 is also provided at the lower end of the stirring rod 8.

The length of the stirring blade 10 is set such that a columnar hole dug by the stirring blade partially overlaps a columnar hole dug by an adjacent stirring blade, and stirring blades of adjacent stirring rods do not interfere with each other. The height positions are different from each other. The rotating directions of the stirring rods 8 are opposite to each other in order to prevent the wall surfaces of adjacent excavated columnar holes from collapsing and to perform stirring and mixing in a stable state.

Note that the soil hardening agent pressure pump 13 usually includes:
The curing agent taken out from the curing agent hopper is supplied. Any type of soil hardening agent can be used as long as it hardens after a certain period of time when mixed with soil and sand.

Accordingly, in this stirring mixer having the above configuration, the main frame 1 is run on the endless tracks 2, 2 on the ground where the underground wall is to be constructed, and then the stirring rod 8 is rotated by the hydraulic motor 6. At the same time, when the support base 5 is lowered by the hydraulic cylinder devices 3, 3, a columnar hole is bored in the ground by the stirring blades 10, and at the same time, the excavated earth and sand in the columnar hole is stirred.
The depth of the columnar hole is determined by the amount of descent of the support base 5, so when the depth of the columnar hole reaches the desired depth, the support base 5 is raised. ) During the rising operation, the pressure pump 13
is driven to eject milky soil hardening agent from the discharge ports 11 and 14. Then, the soil hardening agent and the excavated soil are well stirred and mixed in the columnar hole by the stirring blades 10, so that the strength of the columnar array, that is, the underground wall, which is later naturally hardened, becomes uniform and strong.

In this embodiment, an underground column row is formed in which four adjacent columns overlap each other at a time.
Before this underground column array hardens, the endless tracks 2, 2
By moving the main frame 1 using A middle wall can be formed. FIG. 4 shows an example of a columnar hole 15 and its formation line B when a basement is formed in the ground surrounded by a straight line A. It goes without saying that the device of the present invention can be used not only for forming basements but also for forming underground walls for purposes such as construction.

In summary, according to the present invention, an underground wall can be formed in any position by moving the main frame on an endless track, so rapid and continuous work is possible, and multiple Since the stirring rod and stirring blade form a row of columns in which adjacent columns partially overlap, it is possible to easily obtain an underground wall with excellent strength. In addition, the stirring rod and stirring shaft mix the earth and sand in the columnar hole to be excavated with a soil hardening agent without digging it out, and then harden the mixed earth and sand to form an underground wall. It is suitable as a construction machine for underground walls in soft ground where there is a risk of wall collapse.

Furthermore, in the agitator mixer for constructing underground walls of the present invention, adjacent agitator rods rotate in opposite directions to each other, preventing the wall surface of the excavated columnar hole from collapsing, and agitation and mixing can be performed in a stable state.

[Brief explanation of the drawing]

1 and 2 are a schematic front view and a side view showing an embodiment of a stirring mixer according to the present invention. FIG. 3 is a perspective view of the stirring blade portion below the stirring shaft. FIG. 4 is a plan view showing an example of underground wall formation lines when forming a basement. 1: Main frame body, 2: Endless track, 3: Hydraulic cylinder device, 5: Support base, 7: Hydraulic unit, 8: Stirring rod, 9: Swivel joint, 10: Stirring blade, 11, 14: Discharge port, 13: Soil hardening agent pressure pump.

Claims (1)

[Scope of utility model registration request] A main frame body equipped with a pair of left and right running tracks at the lower end, a support base that moves up and down by a hydraulic cylinder device supported by this main frame body, and a support base that is rotatably suspended from this support base via a swivel joint. a plurality of stirring rods, a rotational drive means for the stirring rods, stirring blades protruding radially below the stirring rods, an opening in the stirring blades communicating with a shaft passage provided in the stirring rods; outlet,
The soil hardening agent is force-fed to the stirring blade outlet through the swivel joint and the shaft passage of the stirring rod. A soil hardening agent supply means is provided, and the plurality of stirring rods are arranged in parallel between the left and right endless tracks at a required interval in the running direction of the endless tracks, and the rotation directions of adjacent stirring rods are mutually aligned. Differently, the stirring blades of these stirring rods have a length such that the columnar holes dug by the stirring blades partially overlap with the columnar holes dug by the adjacent stirring blades, and the stirring blades of the adjacent stirring rods are prevented from interfering with each other. An agitation mixer for constructing underground walls that features levers that are at different heights to avoid problems.