JPS6327492B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clay soil improving machine used for improving clay soil.

Recently, with the expansion of civil engineering work, it has become difficult to obtain soil suitable for building embankments, roadbeds, etc. near construction sites, and high-quality soil has to be transported from far away at great expense. On the other hand, in order to make effective use of land, structures are increasingly being constructed on areas with soft ground that had previously been left unattended, but the soil generated during excavation is so weak that it cannot be used for embankment materials, etc. Because it cannot be done, it is abandoned on idle land. In this way, in civil engineering work, on the one hand, there is a shortage of high-quality soil necessary for embankments, and on the other hand, unusable soil is thrown away. Therefore, at present, it is extremely important to improve and utilize soft soil with a high moisture content, and its economic effects are large.

To improve these soft soils and clayey soils with high water content, stabilizers such as lime and cement, sand, stone powder, etc.
A method of mixing by adding a mixing aid such as dry sand is adopted. Possible methods for this include on-the-street mixing using a self-propelled mixer, and stationary mixing using a large mixer such as a pug mill mixer installed at an appropriate location. Since the thickness of the soil is less than 60 cm, it is necessary to spread the soil to be treated to a thickness of 60 cm, which is time-consuming and increases costs. The latter method has not been put to practical use because there are problems with supplying the soil, crushing it, and mixing stabilizers and mixing aids when treating clayey soil with a high moisture content.

In order to solve the above-mentioned problems, this invention provides a clay soil improvement machine that improves clay soil by adding and mixing a soil stabilizer and a mixing aid to clay soil.
A hopper that supplies the soil stabilizing material and the mixed auxiliary material independently, a conveyor that loads and transports the clay soil, the soil stabilizer, and the mixed auxiliary material supplied from these hoppers in layers, and the conveyor that transports the clay soil, the soil stabilizer, and the mixed auxiliary material. a rotary ivy equipped with a paddle on a paddle shaft for crushing and mixing a layered material consisting of clayey soil, a soil stabilizing material, and a mixing auxiliary material, and the paddle and paddle shaft of the rotary ivy are hollow, In addition, the tip of the paddle is provided with an ejection hole through which the powdered stabilizer and dry air sent from the paddle shaft are ejected.

Hereinafter, the present invention will be explained in detail with reference to the drawings. Figures 1 to 3 show an example of a clayey soil improver according to the present invention, and the one designated by the reference numeral 1 in the figures is a base, which is installed on a foundation provided at the site. Above one end of the base 1 is provided a hopper 2 into which soil to be treated such as clayey soil is fed, and below the hopper 2 is provided a feeder 3 for feeding the soil to be treated. gate 4 and gate 4
Hydraulic cylinder 5 and rotary cutter 6 that adjust the opening degree of
is provided.

Below the feeder 3, a conveyor 7 for conveying mixed auxiliary materials such as sand, stone powder, dry sand, etc. that enhances the mixing effect of the soil to be treated and the stabilizing material, and a hopper 8 for storing the mixed auxiliary materials are installed. A feeder 9 for conveying the mixed auxiliary material is provided extending diagonally upward.
A gate 10 is provided above the feeder 9 to keep the amount of mixed auxiliary materials supplied constant.

A hopper 11 for storing stabilizing materials such as cement and lime is provided approximately in the center of the base 1.
A feeder 12 for transporting the stabilizer is provided below the hopper 11, and a conveyor 13 for feeding the stabilizer to the hopper 11 is provided above the hopper 11. A gate 14 is provided at the outlet of the hopper 11 to keep the amount of stabilizer supplied constant. The feeder 3, the feeder 9, and the feeder 12 are arranged so that the discharge end of the feeder 9 is located at the most upstream position (first
(on the left side in the figure), then the discharge end of the feeder 3, and the discharge end of the feeder 12 at the most downstream position, and below the discharge ends of the feeders 3, 9, 12,
One conveyor 15 is provided. Therefore, in the above configuration, the mixed auxiliary material is first conveyed onto the conveyor belt 15a of the conveyor 15 by the feeder 9, and the feeder 3 is placed on top of the mixed auxiliary material.
Cohesive soil is placed on top of the clay soil, and a soil stabilizing material is placed on top of the clay soil by the feeder 12, and the mixed auxiliary material, clay soil, and soil stabilizing material are layered and transported from left to right in Figure 1. It will be done.

A double rotary cutter 1 is attached to one end of the base 1.
6 and 17 are provided. These two-barrel rotary cutters 16, 17 have paddle shafts 19, 20 attached to the side plate 18 via bearings, and a large number of paddles 21, 21' detachably attached to these paddle shafts 19, 20. 21″..., 22, 2
2', 22''... and are rotated by a prime mover (not shown) in mutually opposite rotational directions as shown in FIG. 1. Paddle shafts 19, 20 and paddles 21, 21' ..., 22, 22'... are formed hollow, and one end of the paddle shafts 19, 20 is connected to a hose 24 via a swivel joint 23.
The hose 24 is connected to a powder air pumping device (not shown) or a blower (not shown). A blowout hole 25 is bored at the tip of each of the paddles 21, 21'..., 22, 22'... to blow out powdered stabilizer or dry air sent from a powder air pumping device or blower through a hose 24. be able to. Paddles 21, 21'..., 22, 22'... may have different shapes depending on the properties of the soil to be treated. Further, the rotary cutters 16, 17 are entirely enclosed by a housing 26 which is strongly formed of a thick plate or the like, except for the discharge port for treated soil.

Below the rotary cutter 17 is a discharge conveyor 2 extending obliquely upward from the bottom of the rotary cutter 17.
7 is provided, and this discharge conveyor 27 discharges the crushed and mixed treated soil to the outside. Further, a duct 28 is provided so as to enclose the discharge conveyor 27, and an exhaust port 29 is provided above the duct 28.

The operation of the clay soil improving machine constructed as above will be explained next. The soil to be treated, such as clay soil, is loaded into the hopper 2 by a bucket loader or the like, and is transferred onto the conveyor 15 by the feeder 3. At this time, large lumps of soil mixed in the soil to be treated are crushed by the rotary cutter 6, and the amount transferred to the conveyor 15 is quantified by the gate 4. Mixed auxiliary materials such as sand, stone powder, and dry sand are sent to the hopper 8 by a conveyor 7, and further sent to the conveyor 15 by a feeder 9.
The amount transferred is quantified by Stabilizing materials such as lime and cement are fed into the hopper 11 by a conveyor 13 and fed to a conveyor 15 by a feeder 12, and the feed amount of the stabilizing material is quantified by a gate 14. On the upper surface of the conveyor belt 15a of the conveyor 15, the soil to be treated, the mixed auxiliary material, and the stabilizing material transported as described above are placed on the bottom layer, the mixed auxiliary material is on the bottom layer, the soil to be treated is on top of that, and the soil is stabilized on top of that. Materials are layered one after another. This layered material is disposed between the upper surface of the conveyor 15 and the feeder 12 on the exit side of the conveyor 15.
The rotary cutter 1 is sandwiched between the underside of the
6 will be sent out.

The layered material is the paddle 2 of the rotary cutter 16.
1, 21', 21''... to a thickness of 1 cm or less, the cut layered material collides with the housing 26 and is crushed, and then the paddles 22, 22', 22'' of the rotary cutter 17 ... is sufficiently mixed and accumulated on the discharge conveyor 27, and the discharge conveyor 2
7 and is discharged to the outside and stored or transported as a product.

In the above process, the paddles 21, 21'..., 2
Powdered stabilizer is jetted out from jetting holes 25 drilled at 2, 22', . . . . This increases the effectiveness of crushing and mixing, allowing for sufficient processing.

In addition, it reduces the water content of the soil to be treated, crushes it,
In order to improve the mixing effect, heated dry air may be ejected from the ejection holes 25. In order to blow out the powdered stabilizer or heated dry air from the blowout hole 25, the powdered stabilizer or heated air is passed through the hose 24 and the paddle shafts 19 and 20 from a powder air pressure feeding device or a blower (not shown). This can be done by feeding. The air containing moisture separated from the soil to be treated passes through the duct 28 and is discharged to the outside from the discharge port 29.

In addition, in the above explanation, the rotary cutter 1
6 and 17 described the two-unit type, but in order to further improve the mixing effect and increase the processing capacity, a three-unit type was introduced.
It is also possible to make it a continuous system. Furthermore, if the soil to be treated contains soft rock or is treating very hard soil, blades made of cemented carbide may be provided at the tips of the paddles 21, 21'..., 22, 22'....

As explained above, the clay soil improving machine according to the present invention is a clay soil improving machine that improves clay soil by adding and mixing a soil stabilizer and a mixing aid to clayey soil. , a hopper that supplies mixed auxiliary materials independently, a conveyor that transports the viscous soil, soil stabilizing material, and mixed auxiliary material supplied from these hoppers in layers, and viscous soil that is transported by this conveyor. The rotary cutter is equipped with a paddle on the paddle shaft for crushing and mixing a layered material consisting of soil, soil stabilizing material, and mixed auxiliary material, and the paddle and paddle shaft of the rotary cutter are hollow, and the paddle tip is hollow. A blowout hole is provided in the section to blow out the powdered stabilizer and dry air sent from the paddle shaft, and the mixed auxiliary material, cohesive soil, and soil stabilizer are loaded in layers on the conveyor belt and transferred to the rotary cutter. However, the layered material is crushed and mixed by the rotation of the rotary cutter, and dry air and powdered stabilizer are jetted out from the jetting hole at the tip of the paddle, so that it can be used as a mixing auxiliary material. To be able to accurately and evenly mix a soil stabilizer into clayey soil, to prevent the clayey soil from adhering to rotary ivy, etc., to continue treatment work for a long time, and to perform the work efficiently and quickly. Can be done.

[Brief explanation of the drawing]

Figures 1 to 3 show an example of the clay soil improving machine of the present invention, Figure 1 is an explanatory diagram showing a side cross section of this improving machine, and Figure 2 is a detailed view of the rotary cutter of this improved machine. 3 are cross-sectional views of the rotary cutter of this improved machine. 2, 8, 11...hopper, 6...rotating cutter,
15... Conveyor, 16, 17... Rotary cutter, 19, 20... Paddle shaft, 21, 22... Paddle, 25... Spout hole.

Claims (1)

[Claims] 1. In a clay soil improvement machine that improves clay soil by adding and mixing a soil stabilizer and a mixing auxiliary material, hoppers 2, 8, 11 and these hoppers 2,
Conveyor 15 that loads and transports clay soil, soil stabilizing material, and mixed auxiliary materials supplied from 8 and 11 in layers.
Then, the layered material made of clay soil, soil stabilizing material, and mixed auxiliary material transferred by this conveyor 15 is crushed,
A rotary cutter 16 is provided with a mixing paddle 21 on a paddle shaft 19, and the paddle 21 and paddle shaft 19 of the rotary cutter 16 are hollow,
A cohesive soil improving machine characterized in that a blowout hole 25 for blowing out powdered stabilizer and dry air sent from a paddle shaft 19 is provided at the tip of the paddle.