JPS5820662Y2 - deep mixing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a deep mixing machine for applying a deep mixing method in which cement-based and other ground improvement agents are applied to soft ground such as the seabed by stirring. It is something.

Conventionally used multi-axis deep mixing machines are generally
The plurality of transmission shafts transmitting power to the plurality of stirring shafts are configured to be rotated by a single motor via a reduction gear, -
In this processing machine, the mutual arrangement relationship between the plurality of transmission shafts, and hence the plurality of stirring shafts connected thereto, was fixed in a single manner.

By the way, if the ground to be improved is relatively soft mud, 1
It is advantageous in terms of construction cost to use a large-diameter stirring blade that has a large area to be treated, and conversely, if the target ground is relatively hard, it is appropriate to use a small-diameter stirring blade.

However, in conventional machines such as those mentioned above, the mutual arrangement relationship between the multiple stirring shafts is fixed and the distance between the multiple stirring shafts is constant. The diameter of the stirring blade is determined automatically, and even if each stirring blade can be replaced with the stirring shaft or each stirring blade can be detachably attached to the stirring shaft, the diameter of the stirring blade must be changed depending on the hardness and softness of the target ground. I couldn't.

Therefore, if you try to change the diameter of the stirring blades in an existing processing machine, you will have to make major modifications to the processing machine, such as changing the mutual arrangement relationship between multiple transmission shafts and stirring shafts. This will require a large amount of expense.

In addition, when applying cement-based or other ground improvement agents into soft ground, depending on the soil quality of the soft ground, in addition to applying it over the entire surface, selecting an appropriate pattern such as a honeycomb, lattice, or triangular shape and applying it to the area. It has already been proposed that the stirring shafts be applied in a continuous manner, but in the case of conventional processing machines such as those mentioned above, the mutual arrangement relationship between multiple stirring shafts is fixed.
- The processing machine cannot efficiently apply various patterns; at best, it can only apply one side of a honeycomb, lattice, or triangular pattern.

Of course, preparing a processing machine for each pattern as described above would require a large amount of expense.

The purpose of this invention is to provide a new deep mixing machine that eliminates the above-mentioned disadvantages of conventional machines and significantly reduces the cost of ground improvement using the deep mixing method. It is in.

Regarding the illustrated embodiment, the configuration of the deep mixing processing machine according to the present invention will be explained. Eight stirring shafts 4 are provided in a connected manner.

Each outer tube 1 is divided into a plurality of parts in the length direction, and each part is connected 5 by flanging.

Further, each stirring shaft 4 is attached with an excavating/stirring blade 6A and a stirring blade 6B.

In the conventional case, a drive unit equipped with a single motor and a speed reducer was provided to rotationally drive the plurality of transmission shafts 2, whereas in the illustrated case, in particular, each transmission shaft 2 is An electric or hydraulic motor 7 is provided at the upper end to rotate each transmission shaft 2 without going through a speed reducer, and a total of eight motors 7 are installed inside the upper frame 8 of the processing machine. It is installed in

The entire processing machine is suspended and supported by an upper frame 8 on a crane of a work boat or the like.

The eight transmission shafts 2 are connected in the middle of the transmission shafts 2 while allowing rotation of each transmission shaft 2, and the mutual arrangement relationship between the eight transmission shafts 2 and therefore the eight stirring shafts 4 is determined. In order to set the mutual arrangement relationship, in the illustrated case, the outer tube 1 is directly
It is designed to create a fixed connection between the
As shown in FIG. 1, a plurality of connecting means 9 are provided intermittently along the length of the outer tube 1.

The details of this connecting means 9 will be described later, but
In the case shown in the figure, the mutual arrangement relationship between the plurality of transmission shafts 2 and the stirring shaft 4 set by the connecting means 9 is such that the soil improvement agent can be applied to the entire surface of the target ground. There is.

If you look at Figures 5 and 6, which will be explained later, the mutual arrangement relationship between the stirring shafts 4 for applying the improver over the entire surface.
As shown in FIG.
The rotational trajectories of the upper excavating and stirring blade 6A and the stirring blade 6B are arranged so that they partially overlap.
As shown in Figure a, the modifier application pile should be formed in a close-packed pattern.

To explain the specific structure of the connecting means 9 in the case shown in FIGS. 1-4, as shown in FIG. 3, each transmission shaft 2 is also divided into multiple parts in the length direction corresponding to the outer tube 1 The respective parts are connected 10 so as not to rotate relative to each other, and thrust receiving parts 11 are appropriately arranged on the inner surface of the outer tube 1 to receive the thrust acting in the axial direction of the transmission shaft 2. At the same time, ball bearings 12 supporting the transmission shaft 2 are appropriately arranged, and in the ball bearing 12 installation part, on the outer circumferential surface of the outer tube 1, appropriate rollers are intermittently placed in the circumferential direction. In this arrangement, the ribs 13 are made to protrude in the radial direction and are fixed by welding.

Then, the eight transmission shafts 2 and the outer tube 1 are arranged as shown in FIG. 4 so that the eight stirring shafts 4 take the mutual arrangement relationship shown in FIG. 5a, and two adjacent A pair of connecting plates 14 on both sides are placed across the ribs 13 on the outer tube 1, and the pair of connecting plates 14 and the ribs 13 on each outer tube 1 are tightened with bolts 15 and nuts 16. At the same time, within the square at both ends in the longitudinal direction, four angles 1 are formed so as to straddle the two adjacent ribs 13 of the ribs 13 located on two diagonals.
7, and bolts 15 and nuts 16 between each rib 13 and the legs of the two angles 17 facing each other across each rib 13.
The outer tubes 1 are connected by tightening.

In the illustrated deep mixing machine according to this invention, the connecting plate 14 and the angle 1 in the connecting means 9 described above are
A plurality of sets of connecting plates and angles similar to 7 are provided, one of which is the above-mentioned connecting plate 14 and angle 1.
7, but the other sets of connecting plates and angles are as follows.

That is, one purpose of providing multiple sets of connecting plates and angles in this way is to change the mutual arrangement relationship between the eight stirring shafts 4 according to the application pattern of the soil improvement agent. The pattern will first be explained with reference to FIGS. 5 and 6.

As explained above, the mutual arrangement relationship between the shafts 4 shown in FIG. 5a is for the overall conditioner application pattern shown in FIG. 6a. Shape axis 4
The mutual arrangement relationship between the two is for the modifier lattice application pattern shown in FIG. Although this is a modifier lattice application pattern, unlike the pattern shown in Figure 6, it is a modified lattice application pattern in which two rows of modifier application piles are closely aligned in one direction, and The interposition relationship between the Y-shaped shafts 4 shown in Figure 5d is for the modifier honeycomb application pattern shown in Figure 6d.

That is, if the eight stirring shafts 4 are arranged in a square shape as shown in FIG. By repeating the treatment each time while moving the treatment machine according to the desired pattern, the improver is applied in the lattice-like application pattern shown in FIG. 6.

The relationship between the axes 4 arrangement shown in FIG. , S, to Sd are formed, and by repeating the processing each time while moving the processing machine according to the desired pattern, as shown in Fig. 6a,
The modifier will be applied in the patterns shown in c to d.

In order to obtain the mutual arrangement between the shafts 4 as shown in FIGS. .

These connecting means 18, 19, 20 are constructed by using the above-mentioned ribs 13 on the outer tube 1 as they are, and by appropriately changing the connecting plates and angles corresponding to the above-mentioned connecting plates 14 and angles 17. be done.

That is, as illustrated in Figure 7 a and l),
Another connecting plate 14', which provides a corresponding mutual arrangement between the eight stirring shafts 4, depending on the intended pattern.

14'' and angle 17' are used.

In order to obtain various mutual arrangement relationships between the shafts 4 as illustrated in FIGS. Some of the ribs 13 are left loose, like the ribs 13 shown in chain lines in FIG. 7, when the ribs 13 are connected to obtain a negative mutual arrangement.

As mentioned above, in addition to being able to change multiple types of shapes or patterns formed by the eight stirring shafts 4, it is also possible to change the distance between the stirring shafts 4 even within the same shape or pattern. Ru.

This means that each connecting plate 14, 14', 14 as described above
This is possible by preparing multiple sets of different dimensions for each angle 17 and 17'.

Alternatively, holes or connecting plates 14, 14', 14, 14', 14', 14' or 14' are formed in the rib 13 for passing the bolt 15 through.
The distance between the shafts 4 can also be changed by providing multiple rows of holes formed in the 4" and angles 17 and 17' and using any one row of bolt insertion holes when connecting. .

To fix the eight motors 7 in the upper frame 8 described above, means similar to the coupling means 9.18, 19.20 may be used.

In FIG. 3, reference numeral 21 denotes a swivel installed on the transmission shaft 2 at the lower end of the outer tube 1, and a ground improvement agent such as cement milk is supplied to the swivel 21 from a supply pipe (not shown) that opens into the swivel 21. It can be discharged into the ground from the discharge port at the end of the stirring shaft 4 through the inside of the swivel 21, a supply path 22 drilled in the lower end of the transmission shaft 2, and a supply channel 23 bored in the stirring shaft 4. .

The construction mode of the deep mixing treatment method using the deep mixing treatment machine of this invention configured as described above is the same as that of the conventional machine, and the treatment machine is penetrated into the target ground to a predetermined depth. Then, while pulling out the treatment machine, the soil improvement agent is discharged from the 4 ends of the stirring shaft, and the soil improvement agent is stirred and mixed into the soil by the rotation of the blades 6A and 6B, or the treatment machine is inserted into the target ground. The ground improvement agent is discharged from the 4 ends of the agitation shaft and penetrates to a predetermined depth, and then, while pulling out the processor, the improvement agent is stirred with the soil by the rotation of the blades 6A and 6B and mixed into the soil. As a result, the soil improvement agent is applied to the target soft ground, and the treatment machine according to this invention exhibits the following advantages due to the above-mentioned configuration.

That is, the deep mixing machine according to this invention is configured so that each transmission shaft 2 is driven by a separate motor 8, and also includes a plurality of sets of connecting means 9, 18, 19 as described above.
．． 20, the mutual arrangement relationship between the eight transmission shafts 2 and the eight stirring shafts 4 connected thereto can be easily changed. , c or d, and by connecting the outer tubes 1 of the power transmission shaft 2 using any one set of corresponding connecting members 9, 18, 19 or 20, the same arrangement can be achieved. Relationships can be fixed.

That is, the application of the improver in various patterns as shown in FIG. , has become.

Further, as described above, each connecting member 9.18, 19.20
is constructed so that the length of the connecting portion by the connecting plate 14, 14' or 14'' etc. and the connecting portion by the angle 17 or 17' etc. can be changed. By changing the length of the part, it is also possible to change the distance between the transmission shafts 2, and therefore between the stirring shafts 4, and change the width of the overlapping region of the rotation loci of the adjacent blades 6A and 6B. At the same time, by making the blades 6A and 6B replaceable together with the stirring shaft 4, or by attaching the blades 6A and 6B to the stirring shaft 4 in a removable manner, the improver application pattern itself can be made the same. , 6B can be easily used as a processing machine with different diameters.

That is, the mutual arrangement relationship between the plurality of stirring shafts 4 can be changed not only in terms of shape but also in terms of the distance between the shafts.

Note that the number of stirring shafts 4 is of course not limited to the eight illustrated above. For example, as illustrated in FIG. 8, 12 stirring shafts 4 are provided, and as shown in FIG. 8a. like,
It is also possible to apply the modifier in a hexagonal pattern all at once.

Of course, in this case as well, other mutual arrangement relationships can be established between the plurality of stirring shafts 4, such as the arrangement relationship for the entire surface application pattern of the improver shown in FIG.

Further, in the previous embodiment, each transmission shaft 2 was covered over its entire length with the outer tube 1, but the connecting means 9.18, 19.2
A short outer tube that rotatably supports the transmission shaft 2 is provided only in the portion connected at 0, similar to the long outer tube 1 described above, and a suitable portion corresponding to the rib 13 is provided on this short outer tube. The specific structure of the connecting means may be changed so that several ribs are provided protruding along the radial direction in the same way as the ribs 13.
It is possible.

As described above, the deep mixing processing machine of this invention is provided with separate motors 7 for rotationally driving each of the plurality of transmission shafts 2 that transmit power to the plurality of stirring shafts 4 without using a speed reducer, and each of the above-mentioned An outer tube 1 that rotatably supports each transmission shaft 2 is provided on the transmission shaft 2 so as to restrict displacement along the axial direction of the transmission shaft 2, and an appropriate number of outer tubes 1 are provided on each of the outer tubes 1 along the radial direction. A plurality of sets of connecting members 14, 14', 14'' which connect the ribs 13 on the outer tube 1 on different transmission shafts 2 such that the distance between the shafts of the transmission shafts 2 can be changed. , 15, 16
. It is configured such that it can be connected by selectively providing a mutual arrangement relationship between the two, and has the following advantages.

That is, in the deep mixing processing machine of this invention, by making it possible to change the mutual arrangement relationship between the plurality of stirring shafts 4 in terms of the distance between the shafts 4 as described above, it is possible to replace the stirring blades together with the stirring shafts. By combining the structure that allows the blades to be attached and detached from the stirring shaft, the diameter of the stirring blades can be easily changed according to the hardness and softness of the target ground in the processing machine. By making it possible to change the shape or pattern formed by the process, it becomes possible to easily achieve various modifier application patterns using the -processing machine. The application of the soil improvement agent can be done by changing the application area of the improvement agent, and the application mode of the improvement agent can be easily changed according to the soil quality of the soft ground to be improved, and deep mixing is possible. This greatly reduces the cost of ground improvement using the treatment method.

Further, in the deep mixing processing machine of this invention, the plurality of transmission shafts 2 that transmit power to the plurality of stirring shafts 4 are each driven by a separate motor 7, so that the plurality of transmission shafts 2 have a flexible arrangement pattern and distance between the shafts. An appropriate number of ribs 13 protruding from the outer tube 1 provided on each transmission shaft 2 and ribs 13 on the outer tube 1 on different transmission shafts 2 are designed to avoid problems in driving even if the transmission shaft 2 is A plurality of sets of connecting members 14, 14' connect the transmission shafts 2 so that the distance between them can be changed.

14'', 15, 16, 17.17', the arrangement pattern and distance between the axes can be changed.
A structure is provided in which a plurality of sets of connecting frames are provided in which the arrangement patterns and the distances between the shafts given to each other are different from each other, and the plurality of transmission shafts are connected by the connecting frames. Compared to the case where it is possible to change by
The mechanism itself for changing the arrangement pattern and the distance between the axes of the plurality of stirring shafts 4 has a simplified structure and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway, partially cutaway schematic front view of an embodiment of this invention, and FIG. 2 is a schematic side view showing a part of the same embodiment.
Fig. 3 is a longitudinal sectional front view of the main part of the same embodiment, Fig. 4 is a cross-sectional view taken along line I - V in Fig. 3, and Fig. 5 a, l), c and d are respectively the same embodiment. Schematic plan views showing various usage modes of the example, Figures 6a, l), c and d are respectively shown in Figure 5a.
, l), c and d. Figures 7a and 7b are respectively partial perspective views illustrating the two usage patterns of the same example. Figures 8a and 8b are schematic plan views illustrating two usage modes of another embodiment, respectively. 1...Outer pipe, 2...Transmission shaft, 4...
... Stirring shaft, 6A ... Excavation and stirring blade, 6B.
... Stirring blade, 7 ... Motor, 9 ...
...Connecting means, 13...Rib, 14.14',
14''...Connecting plate, 15...Bolt, 16...Oak), 17.17'...
Angle, 18, 19. 20... Connection means.

Claims (1)

[Scope of utility model registration request] Separate motors are provided to rotate each of the plurality of transmission shafts that transmit power to the plurality of stirring shafts without using a speed reducer, and an outer tube rotatably supports each of the transmission shafts on each of the transmission shafts. is provided to restrict the displacement along the axial direction of the transmission shaft, and an appropriate number of ribs are provided protruding along the radial direction on each of the outer tubes, and transmission is performed between the ribs on the outer tubes on different transmission shafts. A plurality of sets of connecting members that connect the shafts so that the distance between the shafts can be changed are provided, and the plurality of transmission shafts are connected in the middle of the transmission shafts, and the plurality of stirring shafts have different arrangement shapes and distances between the shafts. A deep mixing processor is characterized in that it is configured to be connectable by selectively giving a mutual arrangement relationship of - out of the mutual arrangement relationships of.