JPS63171917A - Apparatus for stabilizing and hardening soft ground - Google Patents

Abstract

PURPOSE:To reduce the weight of the apparatus as well as make the adjustment of the apparatus easier by a method in which a set of moving pulleys is attached to the upper and lower parts of a bracket, a set of stationary pulleys is fixed to the upper and lower parts of the corresponding frame, and chains are engaged with them to rotate the fixed pulleys to provide a vertical motion. CONSTITUTION:Chains 10 whose both ends are fixed are set between chain wheels 8a and 8b attached to the upper and lower parts of brackets 6 and 6' provided to both ends of a rail 5 and chain wheels 9a and 9b fixed to the upper and lower parts of the corresponding frame 4. The chain wheel 9a is clockwise or counterclockwise turned to vertically move it. A box 17 to rotatably support a rotary shaft 16 is provided for the rail 5, and a stirrer 15 having a stirring blade on its tip is also provided for the rail 5. A slurry hardener is injected into the upper end of the shaft 16 and jetted from the hole 27 of the blade 18 to harden the soil of soft ground. The load on the chain 10 supporting the weight of the bracket 6 can thus be reduced by half and the power of the motor to turn the fixed pulley can also be halved.

Description

[Detailed description of the invention] [Industrial application field]

The present invention provides an elevating means used in a hardening treatment device to perform hardening work extremely reliably and efficiently, by stably solidifying the inside of a soft soil layer with a hardening agent, thereby making a certain area of the soft soil into stable ground necessary for civil engineering. It is related to.

[Prior art]

The elevating means in conventional hardening processing apparatuses has been a winch mechanism for hoisting and lowering by its own weight, or a mechanism for elevating and lowering by meshing a rack and a binion.

[Problems to be solved by the invention]

However, in the former prior art mentioned above. The point that the rising speed and descending speed of the elevating means are not the same,
There is a problem in that when the soft soil layer has a low water content and is hard, it may become impossible to penetrate with only the pressing force due to its own weight.Furthermore, the latter conventional technology described above requires a large amount of time and man-hours for adjustment during assembly. Requires manpower, complex structure,
Moreover, it was highly automated. The present invention overcomes the drawbacks of the prior art described above.

[Means to solve the problem]

Attach a set of movable pulleys to the top and bottom of the bracket. A set of fixed pulleys fixed at the upper and lower positions of the frame corresponding to the moving pulley is provided, and a chain fixed at both ends is stretched between the fixed pulley and the moving pulley, and the fixed pulley is used as a clock. The above-mentioned problems of the prior art are solved by configuring the device to move up and down by being rotated in the counterclockwise direction or in the counterclockwise direction.

[For use]

Since the fixed pulley, movable pulley, and chain are configured as shown in Figure 3, the force applied to each chain supporting the weight of the movable pulley and bracket is lower than that of conventional lifting means. It becomes 1/2. This allows the motor to rotate the fixed pulley to have a capacity of 172 mm.

【Example】

Embodiments of the present invention will be described below based on the drawings. Figures 1 to 4 show the curing treatment apparatus, with Figure 1 being a front view, Figure 2 being a side view, Figure 3 being a partial explanatory view of the elevating means, and Figure 4 being a partial explanatory diagram of the stirring means. The hardened wall @2 is placed astride the two floats 3 and 3'. Reference numeral 4 designates a U-shaped frame for supporting the curing treatment apparatus, and rails 5 supporting stirring means, which will be described later, are guided by vertical supports 4a and 4b on both sides to be raised and lowered. That is, 6° 6' is a bracket provided at both ends of the rail 5, and guide rollers 7a and 7b attached to the side surfaces of the bracket are fitted into the vertical supports 4a and 4b, and the upper and lower ends of the bracket are Between the mirror shafts 8a and 8b attached to the mirror shafts and the mirror shafts 9a and 9b fixed to the upper and lower positions of the frame 4 corresponding to the mirror shafts, there are chains fixed at both ends as shown in the M3 diagram. 10 is stretched and the mirror shaft 9a is rotated clockwise or counterclockwise to move up and down. Here, the mirror shaft 9a drives a motor 11 provided on a horizontal support 4c by rotating a shaft 13 via a chain 12, and 14 is a speed reducer. 15.15' is a stirring means, and in this example, 2 is attached to the rail 5.
This is the foundation. Here, the stirring means 15 (15' has the same structure) consists of a box 17 that rotatably supports a rotating shaft 16, and a stirring blade 18 attached to the tip of the rotating shaft, and the box 17 has a side surface of the box 17. It is configured to be able to slide laterally using provided rollers 19 as a guide on the inner surface of the rail, and for its movement, a motor 20 with a reducer provided on the side of the box is connected via a chain 21 to a gear 22 provided on the side of the box. The gear is engaged with the rack 23 on the upper surface of the rail and rotated, allowing free movement. On the other hand, reference numeral 24 denotes a motor for rotating the rotating shaft 16, which is rotated by a sprocket 26 fixed to the rotating shaft 16 via a chain 25. The rotating shaft 16 and the stirring blade 18 are formed hollow inside, and the stirring blade 18 is provided with a through hole 27 through which the slurry curing agent is press-fitted from the upper end of the rotating shaft using a hose means (not shown). By doing so, the through hole 27 of the stirring blade 18
It is supposed to be ejected from. However, in use, first each stirring means I5.15'
drive the motor 20 of the rotary shaft 1 to position both stirring means at a certain distance.
6 to rotate the stirring blade 18, and drive the motor 11 to raise and lower it. At this time, the float is moved slowly by a suitable indexing means such as a winch. At that time, the curing agent is also fed into the agitation section through the hollow part of the rotating shaft 16. In this way, by stably solidifying the inside of the soft soil layer with a hardening agent, it is possible to obtain stable ground necessary for civil engineering within a certain range. In the above embodiment, two stirring means are provided on the rail, but three, four, and so on may be provided. Furthermore, although the explanation has been given on the case in which the curing agent is fed by forming both the rotating shaft and the stirring blade hollow, it may also be carried out by providing a feeding means using a separate pipe near the stirring blade.
Note that the rail supporting the stirring means has been described as being able to be moved up and down by the drive of the motor 11. If stirring blades are installed in multiple stages on the rotating shaft, and the height of the hardened wall required in the soft soil layer can be obtained, this configuration can be omitted and the purpose can be achieved by simply moving the float slowly. Can be made with a continuous hardened wall. Next, by using the apparatus of the present invention described above, it is possible to construct a continuous hardening structure as described below in a soft soil layer. explain. FIG. 5 schematically shows the order in which the inside of the soft soil layer 1 is stably solidified and a continuously hardened structure is constructed, and A is a plan view and B is a side sectional view. In the drawing, AI and AZ are continuous hardened walls that are constructed simultaneously by the above-mentioned hardening processing apparatus, and the hardened walls are spaced apart by a distance Q that allows construction of the next row of continuous walls. Continuous curing processing is performed while positioning the next continuous curing ffB+ within the interval. FIG. 6 shows another example. In the above example, two rows of continuous hardened walls were constructed at the same time, whereas in this example, three rows of continuous hardened walls were constructed at the same time. At that time, one of the stirring blade means was stopped and the next continuous hardening wall was made into 2 rows B+. B B is positioned between A/ and A, and both A and AJ. In addition, the above-mentioned implementation example 't'haA
I, A, B/, and B are hardened from the support layer F, but in the example of one row, J, B, etc. are made from the support layer F.
The area above a certain height from the wall is hardened so as to bridge the partition walls L, A B, and A3. The above is an example of continuously curing a certain area that is required in two repeated operations. be able to. That is, for example, initially continuous hardened wall AI,
When forming A2 at the same time, the interval between the two rows is set to be equal to or slightly larger than the width W of the continuous hardened wall, and the continuous hardened wall B? - is separated and constructed faster than A by the corresponding distance, and the next continuous hardening cr is positioned in the interval P, and the same procedure is performed thereafter, thereby making it possible to perform a wide range of hardening treatment as required. This construction method constructs two or more rows of continuous hardened walls at the same time as described above on each side, and the distance between the successive hardened walls constructed at that time is set to the interval at which the next row of continuous hardened walls will be constructed. The curing process is carried out while guiding the continuous hardened wall, which completely eliminates the risk that the next continuous hardened wall will be formed with an unexpected deviation, and the curing process is carried out accurately and quickly. Therefore, it contributes to a dramatic improvement in hardening processing ability.

【Effect of the invention】

The present invention is configured as described above. Since the force applied to each chain meshing with the movable pulley is 1/2 compared to conventional lifting means, the ability of the motor to rotate the fixed pulley meshing with the chain is 172.
Since the lifting means can be made light and compact, the lifting means can be designed to be light and compact, and furthermore, the curing processing apparatus having the lifting means as a main component can also be made lighter. This makes it possible to suffice with a winch that moves the hardening treatment device with a small winding capacity. Further, it is possible to adjust the descending speed of the lifting means to correspond to the hardness of the soft soil layer depending on the water content of the soft soil layer. Furthermore, as described above, since the structure is simple, adjustment during assembly is easy.

[Brief explanation of the drawing]

Figures 1 to 4 show the curing treatment apparatus, with Figure 1 being a front view, Figure 2 being a side view, Figure 3 being a lifting means, and Figure 4 being a partial explanatory diagram of a stirring blade. It is. Also the fifth
Figures 6 to 6 schematically show how a continuous hardened wall is constructed in a soft soil layer, where A is a plan view, B is a side sectional view, and Figure 7 is the same plan view. . 1...Soft soil layer At, Ako...Continuous hardening wall Bt, f3ko...Continuous hardening wall 2...
...Curing device 5 ...Rail 6.6' ...Brackets 7a, 7b ...Guide rollers 8a, 8b...
...Rivet shafts 9a, 9b... Chain 10 ... Chain 11 ... Motor 12 ... Chain 13 ... Shaft 15 .15' ... Stirring blade 16 ...
... Rotating shaft 18 ... Stirring blade patent applicant Kitagawa Iron Works Co., Ltd. Figure 1 Lr Box taste
taste area

Claims (1)

[Claims] A bracket, a set of movable pulleys attached to the upper and lower parts of the bracket, a set of fixed pulleys fixed to the upper and lower positions of the frame corresponding to the movable pulleys, and the fixed pulley and the movable pulley. It has a lifting means consisting of a chain A suspended at both ends fixed between the chain A, a motor, a shaft provided at the center of a fixed pulley, and a chain B stretched between the motor and the shaft. A hardening treatment device characterized by: