KR200192340Y1 - An agitator for hardening soft ground by a method of depth soil mixing treatment - Google Patents

Abstract

The present invention relates to an agitator used in the deep mixing treatment method for reinforcing soft ground. More specifically, in the deep mixing process for strengthening the ground by mechanically agitating the solidifying agent on the soil which forms the soft ground, the front end excavation portion which injects the ground and excavates the ground, It relates to a stirrer consisting of a propeller type stirring blade for mechanically stirring the solidifying agent, a solidifying agent discharge port which is vertically and horizontally drilled on the stirring blade, and a pressure plate which prevents the slurry from flowing from the inlet to the ground.

The stirrer of the present invention can be replaced with another stirrer with 13 °, 15 °, 17 °, etc. according to the strength of the ground, or it is convenient to adjust the angle of the stirring blade without replacing the stirrer fastened to the rod. Characterized in that can be stirred.

Description

An agitator for hardening soft ground by a method of depth soil mixing treatment}

The present invention relates to a stirrer used in the deep mixing treatment method for reinforcing soft ground, and more specifically, a pressure plate for preventing the outflow of stirrer and slurry which infiltrates soft ground soil and sprays hardener to perform mechanical stirring with soil. It relates to a stirrer consisting of.

In order to build a variety of structures on the soft ground of the depth substrate composed of critically viscous clay and layered clay, the improvement of these soils is necessary. In general, the soft ground treatment method may be divided into a deep mixing process method of mixing and stirring the hardener with the soft soil according to the construction method, a chemical solution injection method and a freezing method to solidify the gap of the soil with a curable material. Among them, the deep mixing treatment method is divided into powder system stirring, slurry type mechanical stirring and high pressure spray stirring. Powder type mechanical stirring and slurry type mechanical stirring are used to mechanically stir yarns and solidifiers using a propeller-shaped stirring blade. Mechanical stirring method. The deep mixing process has been focused only on the development of a chemical liquid (solidifying agent) until now, but the effect was not as expected because there was no stirring equipment that could uniformly spray and mix the chemical liquid (solidifying agent) to the soil.

When stirring the soft ground mixed with gravel or soft ground deposited in layers with the conventional stirrer as shown in FIG. 9, where the ground is soft, the ground is thinly cut like a large rice, and the mixing of the ground soil and the hardener is poor and the stirring blade is hard. The slime discharge phenomenon occurs frequently, and the chemical liquid (solidifying agent) flows back to the upper part, and the solidifying agent ejected from the stirring blade is not ejected to the part suitable for stirring, and there is a large amount of solidifying agent. As the slurry was not mixed well, the slurry was not mixed homogeneously, and the ridges had to be removed after freezing, resulting in an increase in air delay and construction cost.In particular, the stirring speed did not match the characteristics of the ground, that is, the strength of the ground. There was a problem of deterioration.

The present invention solves the above problems by spraying a hardener on the part suitable for stirring, and the stirring wing angle is different depending on the strength of the ground to stir the ground efficiently. It aims to obtain improved ground and to prevent the outflow of slurry, to increase the life of stirrer and to increase the working speed as well as to save the hardening agent.

In order to achieve this purpose, the present invention forms a tip excavation part consisting of three digging plates at the bottom of the agitator shaft, and forms three agitator blades on the side of the agitator shaft, and forms a left tooth and a right tooth on the stirring blade to increase the stirring efficiency. Attach the left and right teeth to form 13 ° and 15 ° and 17 ° with the ground, and select the stirrer with different left and right tooth angles depending on the strength of the ground, or adjust the left and right tooth angles to 13 degrees. °, 15 °, 17 ° adjustable so that it is possible to work with a single stirrer without replacing the heavy stirrer, and the bends of the left and right teeth are staggered during rotation, and among the three stirring wings In one stirring blade, the solidifying agent is discharged, but the diameter of the solidifying agent discharge hole is made larger toward the end of the stirring blade, and in the horizontal direction. Is characterized in that said agent is ejected.

1 is a perspective view of the agitator of the present invention

Figure 2 is a state of use using the stirrer of the present invention coupled to the rod of the excavator

3 is a plan view of the stirrer of the present invention

Figure 4 is a front view for explaining the assembly of the stirring blade to form a circular projection and the angle adjusting projection to adjust the angle of the stirring blade

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is a schematic view of a state in which the stirring blades are assembled on the stirrer shaft formed with a circular protrusion and an angle adjusting protrusion to adjust the angle of the stirring blades

7 is a schematic view of the stirring blade perforated pinhole as a component of the present invention

A: front view

B: B-B section

8 is a schematic view of a state in which the angle adjusting bolt is fitted inside the welding socket which is a component of the present invention;

A: top view

B: front view

9 is a front view of a state in which the solidified liquid is ejected in a conventional stirrer

<Explanation of symbols for main parts of drawing>

1. Agitator shaft 2. Tip excavation

2a, 2b, 2c. Rig plates 3a, 3b, 3c. Stirring blade

3d. Left tooth 3e. Right tooth

3f, 7, 8. Diamond or wear resistant special alloy

4. Rods 5a, 5b, 5c of the excavator. Rod tightening screw

6. Solidifying agent inlet hole 9a, 9b, 9c. Solidified discharge hole

10. Pressure plate 11. Female thread

12, 12a, 13, 13a, 14, 14a. Pinhole 15a, 15b, 15c. Circular projection

16. Bolted female screws 17a, 17b, 17c. Angle adjustment protrusion

18. Male thread 19. Rubber ring

20. Angle adjusting bolt 21. Welding socket

22.pin 23.spanner fitting

The present invention is described in detail by the accompanying drawings as follows.

The stirrer of the present invention is composed of a stirrer shaft (1) made of carbon steel, a tip drilling portion (2), and stirring blades (3a, 3b, and 3c), and the stirrer shaft (1) is coupled to a rod (4) of an excavator. Rod fastening rock screw (5a, 5b, 5c) and a solidifying agent inlet hole (6) for delivering a solidifying agent is formed, the tip excavation (2) excavates the ground and stirred the excavated soil and solidifying agent It consists of three rigs (2a, 2b, 2c) that allow the blades (3a, 3b, 3c) to mix well. The rigs (2a, 2b, 2c) have stepped grooves and Diamond or wear resistant special alloys (7, 8) are attached to the ends of the three digging plates (2a, 2b, 2c), respectively, so that the agitator does not break even when hit by a stone or base rock during the high-speed rotating excavation process. The stirring blades 3a, 3b, and 3c are attached to the side surface of the stirrer shaft 1 at intervals of 120 deg. Left and right teeth (3d) and right teeth (3e) are attached to the left and right sides to form 13 °, 15 ° or 17 ° with the ground, and the bent portion of the left teeth (3d) and right teeth (3e) It is not in a straight line, and the stirring blades 3a, 3b, and 3c dig out the soil when rotating, so that the soil and the hardener are mixed finely. In one of the three stirring blades (3a, 3b, 3c), one of the stirring blade (3a) is a solidifying agent discharge that can discharge the solidifying agent introduced into the solidifying inlet hole 6 of the stirrer shaft (1) to the outside The holes 9a, 9b, and 9c are drilled to discharge the solidifying agent into the cavity that is instantaneously generated on the back of the agitator when the stirring blades 3a, 3b, and 3c are rotated and thrown while the agitator is horizontal. The diameters of the solidifying agent discharge holes 9a, 9b, and 9c may be determined by In consideration of the amount of ejection and the volume of the soil to the outer portion, it becomes larger toward the end of the stirring blade 3a and the solidifying agent is discharged in the horizontal direction.

When using the stirrer, in the soft ground, where the ground is relatively weak, the stirrer with the left tooth 3d and the right tooth 3e formed at the stirring blades 3a, 3b, and 3c formed 17 ° with the ground is used. In a hard place, the agitator has a left tooth (3d) and a right tooth (3e) 13 ° with the ground, and in the middle of the ground, the agitator has a left tooth (3d) and the right tooth (3e) 15 ° with the ground. Using to press the ground using a circular pressure plate 10 so that the hardener is ejected from the excavating stirrer to the ground.

The stirrer configured as described above should be used by replacing the stirrer rod 4 of the excavator when the angle of the stirring blades 3a, 3b, 3c is not suitable for the strength of the ground, but the stirrer rod 4 of the excavator as follows. It is also possible to conveniently work without changing the heavy stirrer from time to time by only adjusting the angle of the stirring blades (3a, 3b, 3c) according to the strength of the ground in the attached state.

On the side of the stirrer shaft (1) to which the stirring blades (3a, 3b, 3c) are attached, circular protrusions (15a, 15b, 15c) having female threads (11) and three pin holes (12, 13, 14) are formed. Angle adjusting protrusions 17a, 17b, and 17c having bolt fitting female screws 16 formed thereon, and at the ends of the stirring blades 3a, 3b, and 3c, male threads 18 and three pin holes 12a, 13a, 14a), but the pinholes 12a, 13a and 14c formed in the circular protrusions 15a, 15b and 15c and the pinholes 12a, 13a and 14a formed in the stirring blades 3a, 3b and 3c have left teeth ( 3d) and the right teeth 3e are drilled to coincide with the ground at an angle of 13 °, 15 °, and 17 °, respectively, so that the male screws 18 of the stirring blades 3a, 3b, and 3c are circular projections 15a, 15b, 15c), but the rubber ring (19) is fitted to the stirring blade (3a) in which the solid solution is injected, so that the solid solution does not leak, and stirring blades (3a, 3b, 3c) under the stirring blade (3a, 3b, 3c) Adjusting angle of 3c) and angle adjusting bolt for fastening The bolt fitting female screw 16 is fitted to the angle adjusting protrusions 17a, 17b, and 17c by welding the welding socket 21 fitted with the 20, and the stirring blades 3a, by turning the angle adjusting bolt 20 from side to side. After adjusting the angle of 3b, 3c to 13 degrees, 15 degrees, and 17 degrees, the pin 22 may be pinched in the pin hole 12, 13, or 14, and may be fixed and used.

Reference numeral 23 denotes a hexagonal spanner fitting portion in which a spanner is inserted to turn the angle adjusting bolt left and right.

According to the present invention, using agitators with different agitator blade angles depending on the strength of the ground, there is no phenomenon that the blade is thinly cut like a rice paddle in the weak ground or the ground is strong, and the pressure is applied to the ground using a pressure plate. By preventing the slime discharge phenomenon that the chemical liquid flows back to the upper part, it prevents backflow of slurry and forms left and right teeth on the stirring blade to increase the stirring efficiency. The soil and chemicals (solidifying agent) are uniformly mixed, and the chemical liquid is uniformly ejected by changing the size of the solidifying agent discharging hole and evenly sprayed in the horizontal direction. Improved ground can be obtained and the life of the agitator is long. In addition, by using a single stirrer without making a plurality of agitators suitable for the strength of the ground, it is possible to shorten the efficient agitation work and work time, and economical advantages are great.

Claims (2)

In the stirrer used in the deep mixing treatment method for reinforcing soft ground, the stirrer shaft (1), which is made of carbon steel, is made up of the tip drilling portion (2) and the stirring blades (3a, 3b, 3c), 1) is formed with rod fastening female screws (5a, 5b, 5c) that can be coupled to the rod (4) of the excavator and a solidifying agent inlet hole (6) for transferring the solidifying agent, the tip drilling portion (2) It consists of two drilling plates (2a, 2b, 2c), the stepped grooves are formed in the drilling plates (2a, 2b, 2c) and the side of the stepped groove and the end of the three drilling plates (2a, 2b, 2c) Diamonds and wear-resistant special alloys 7 and 8 are attached to the portions, and stirring blades 3a, 3b and 3c are attached to the side of the agitator shaft 1 at intervals of 120 DEG C. On the left and right sides thereof, The left teeth 3d and the right teeth 3e are attached to the ground to form 13 °, 15 ° or 17 °, and the bent portion of the left teeth 3d and right teeth 3e is It is not in a straight line so that the stirring blades 3a, 3b, and 3c are made to dig out the soil when rotating. The left tooth 3d has diamond or abrasion-resistant special alloy 3f, and three stirring blades One of the stirring blades 3a of 3a, 3b, and 3c has solidifying agent discharge holes 9a, 9b, and 9c capable of discharging the solidifying agent introduced into the solidifying agent inlet hole 6 of the stirrer shaft 1 to the outside. Perforated) to discharge the solidifying agent into the cavity part which occurs momentarily on the back of the agitator when the stirring blades (3a, 3b, 3c) are rotated and thrown while keeping the horizontal when drilling. The diameters of 9a, 9b, and 9c are larger toward the ends of the stirring blades 3a, and can be discharged in the horizontal direction, so that the ground is relatively soft even when used in connection with the rod 4 of the excavator. In the weak place formed on the stirring blades (3a, 3b, 3c) Agitator with left tooth 3d and right tooth 3e made of 17 ° from the ground, and agitator with left tooth 3d and right tooth 3e with 13 ° from ground in relatively hard ground In the middle of the ground, the left tooth (3d) and the right tooth (3e) uses a stirrer which forms a 15 ° to the ground, and the circular press plate 10 is used so that the hardener ejected from the stirring blade is not ejected onto the ground. Stirrer used in the deep mixing process for strengthening the soft ground, characterized in that the excavation while pressing the ground. The agitator shaft according to claim 1, wherein the agitator blades 3a, 3b, and 3c are attached so that only the angles of the agitator blades 3a, 3b, and 3c may be adjusted to 13 °, 15 °, and 17 ° in one stirrer. (1) the side projection (15a, 15b, 15c) formed with the female screw 11 and the three pin holes (12, 13, 14) formed on the side, and the angle adjusting projection formed with the bolt fitting female screw (16) ( 17a, 17b, and 17c, and the male threads 18 and three pin holes 12a, 13a, and 14a are formed at the ends of the stirring blades 3a, 3b, and 3c, but the circular protrusions 15a, 15b, and 15c are formed. The pinholes 12a, 13a, 14a formed in the pin holes 12, 13, 14 and the stirring blades 3a, 3b, 3c formed in the left angle 3d and the right tooth 3e form an angle with the ground. 13 °, 15 °, and 17 ° perforations to coincide with each other, fastening the male screw 18 of the stirring blades (3a, 3b, 3c) to the circular projections (15a, 15b, 15c), the stirring blade (in which the solid solution is sprayed) 3a) is fitted with a rubber ring (19) to prevent solidified liquid from leaking, stirring blade The lower portion of the dog (3a, 3b, 3c) to weld the welding socket 21 is fitted with the angle adjusting bolt 20, the bolt fitting female screw 16 is fitted to the angle adjusting projections (17a, 17b, 17c) to adjust the angle Turn the bolt 20 to the left or right to adjust the angles of the stirring blades 3a, 3b, and 3c to 13 °, 15 °, and 17 °, and then pin the pin 22 into the pin hole 12, 13, or 14 to secure it. Stirrer used in the deep mixing treatment method for reinforcing soft ground, characterized in that it is fixed and used.