JPH0857U - Ground improvement device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a ground improvement apparatus capable of efficiently mixing soil and sand while finely crushing it simultaneously with rotation and sufficiently mixing the soil and liquid in a short time. [Structure] Rotating rod 1 for ejecting liquid agent from the inside of the hollow
The excavation blade 3 for excavating the ground and the agitation blade 2 for mixing and agitating the earth and sand are fixed to the periphery of the ground, and the revolution diameter of the outer diameter end is slightly smaller than the rotation diameter of the excavation blade 3 at the tip of the agitation blade 2. The vertical rotary blades 4 are made rotatable so as to be large,
A ground improvement device characterized by being pivotally connected like a windmill.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ground improvement device equipped with excavating blades, stirring blades, and vertical rotary blades for injecting a liquid agent and agitating and mixing with soil while excavating deep in soil.

[0002]

[Prior art]

 When constructing a house or factory, the soil quality of the place should be improved to suit the structure. One of the construction methods is to rotate a long rotating rod as a drive shaft, excavate the ground, and at the same time inject the liquid agent, and mix the earth and sand and the liquid agent with a stirring blade. This equipment is equipped with a horizontally extending excavating blade at the tip of the rotating rod, and a horizontally extending agitating blade attached to the top of the rotating rod. There are various types, such as the type that rotates in reverse, but all are designed to stir the soil only by rotating in the horizontal direction.

[0003]

[Problems to be solved by the device]

 As described above, in the case of soil improvement, the soil improvement device excavates deep into the soil while agitating and mixing the soil and the liquid agent to form a pillar pile in the soil. The ground improvement device is large in scale, and since it is stirred only by horizontal rotation, it takes time and the stirring efficiency tends to be poor. Furthermore, unevenness is likely to occur in stirring and mixing, and stirring and mixing of the liquid agent and soil are not always sufficient. The present invention has been made in view of the above problems, and the purpose thereof is to efficiently mix the earth and sand while simultaneously rotating and finely crushing the earth and sand, and sufficiently mixing the earth and sand and the liquid agent in a short time. The object is to provide a ground improvement device that can be used.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is to fix a plurality of excavating blades on the lower end of a rotating rod and a plurality of stirring blades for mixing and stirring earth and sand on the upper part of the rotating rod, and near the tip of the stirring blade in the projecting direction. In addition, a plurality of vertical rotary blades are vertically or inclined in a windmill-like manner so as to have a revolution diameter at the outer diameter end larger than the rotation diameter of the excavation blade, and are pivotally rotatably attached.

[0005]

[Action]

 The operation when the ground improvement device is used as the above means will be described with reference to the reference symbols in the accompanying drawings. If the ground improvement device is used as the above means, the excavation blade 3, the stirring blade 2, and the vertical rotary blade 4 can mix and mix the soil very well. Then, the ground is improved according to the following procedure. (1) While rotating the rotating rod 1, the excavation blade 3 and the stirring blade 2 of the ground improvement device at the tip end are excavated into the soil to excavate to a predetermined depth. (2) When the rotating rod 1 is rotated, the excavating blade 3 and the stirring blade 2 rotate and stir the soil, and then the vertical rotating blade 4 rotates in the vertical direction to finely mix and stir the soil. It At the same time, the liquid agent is injected from the tip of the rotating rod 1 to mix and stir well with the soil. (3) After excavating a hole having a predetermined depth, gradually rotate the rotating rod 1 upward while rotating it in the reverse direction. Also in this case, the stirring blade 2, the excavation blade 3, and the vertical rotary blade 4 rotate in the opposite direction to the direction at the time of intrusion, and mix and stir the soil and the liquid agent well. (4) After pulling out the soil improvement device, a certain hard pile column will be formed in the soil after a while. By repeating the operations (1) to (4) on the land where the building is to be built, multiple solid pile pillars can be formed without breaking the surrounding ground, and the ground can be improved. I can.

[0006]

【Example】

 Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the ground improvement device of the present invention. The rotating rod 1 is provided with an excavating blade 3, a stirring blade 2, and a vertical rotating blade 4, and can rotate forward / backward and can move up and down. The rotary rod 1 is hollow, and the liquid agent can be poured into the soil from the inside of the rotary rod 1.

The ground improvement device includes a rotating rod 1 and an excavating blade 3 fixed to the rotating rod 1 to rotate integrally with it, a stirring blade 2 fixed to the rotating rod 1 to rotate integrally with the rotating rod 1, and the stirring blade. 2, a plurality of rotatable (four in the embodiment) vertical rotors 4 attached to the tip of the rotor 2. In this case, the mounting angle of the central shaft 5 of the vertical rotary blade may be slightly inclined vertically or horizontally, and the number of the stirring blade 2 and the vertical rotary blade 4 may be increased or decreased, or one of them may be increased. The other may be decreased, but the mounting angle α of the vertical rotor 4 should be inclined other than horizontal regardless of the angle of the central axis 5 of the vertical rotor. Further, as shown by the chain double-dashed line in FIG. 1, one of the stirring blades 2 may be vertically displaced and fixed.

Next, as can be seen from FIG. 2, the revolution diameter of the outer diameter end of the vertical rotary blade 4 is slightly larger than the rotary diameter of the excavating blade 3, but this is due to the rotation of the excavating blade 3. It abuts on the unbroken part of the side wall of the drilled hole and naturally proceeds to cut the groove with the vertical rotor 4. Next, if the moving direction of the vertical rotor 4 shown in FIG. 3 is assumed to be A, the inclination angle G of the vertical rotor 4 causes the resistance of the excavated soil and the side wall, and does not move horizontally but shifts in the slope direction B. The plurality of vertical rotors 4 rotate in the vertical direction by repeating this in sequence. Further, the rotation speed of the vertical rotor 4 also changes in proportion to the vertical speed of the rotary rod 1. With such a configuration, the excavation blade 3, the stirring blade 2, and the vertical rotary blade 4 can mix and mix the earth and sand very well.

According to the present invention, a pile column in which the liquid agent and the soil are well mixed and agitated is formed in the soil by simply rotating the rotating rod 1 while injecting the liquid agent and rotating the rod 1 up and down.

[0010]

[Effect of device]

 Since the ground improvement device of the present invention has the structure described in detail above, since it has a relatively simple structure and vertical stirring is performed, the liquid and soil can be extremely well mixed in the soil. It is mixed and stirred, and the ground can be improved efficiently. In addition, since the efficient mixing and stirring is performed, the working time can be shortened and the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a ground improvement device.

FIG. 2 is a plan view of the ground improvement device.

FIG. 3 is a side view showing the principle of rotation of a vertical rotary blade.

FIG. 4 is a perspective view of a conventional ground improvement device of a type in which a stirring blade rotates in a reverse direction and a type in which only an excavation blade and a stirring blade are fixed to a rotating rod.

[Explanation of symbols]

 1 rotating rod 2 stirring blade 3 excavating blade 4 vertical rotor 5 central axis of vertical rotor

Claims (1)

[Scope of utility model registration request] 1. A plurality of excavating blades for mixing and stirring earth and sand and a stirring blade are fixed around a rotary rod for injecting a liquid agent from the inside of the hollow, and an outer diameter end is provided near the tip in the projecting direction of the stirring blade. A ground characterized in that a plurality of vertical rotary blades are vertically or inclined in a windmill shape so as to have a revolution diameter larger than the rotary diameter of the excavation blades, and are pivotally rotatably attached to enable vertical stirring. Improved device