JPH108495A - Manufacture of regulating mud type fluidizing-processed soil and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the regulation of the components of a fluidizing-processed soil by mixing processed soil, water or regulating mud, and removing an excessively large foreign matter from obtained mixture, and after adding a solidifying agent in a sieved mixture, adding water or a regulated muddy water and mixing them. SOLUTION: After processed soil and water or regulating mud are mixed in a kneading vessel 1, a excessively large foreign matter is removed from an obtained mixture through a vibration sieve arranged under the kneading vessel 1. The simultaneous removement of a soil adhering to a shell, etc., is prevented by this sieving. After a solidifying agent is then added into a sieved mixture from a cement silo 5, the water or the regulating muddy water is added in the kneading vessel 4 arranged under the vibration sieve and mixed. A transfer among devices is carried out by utilizing the gravity of the mixture, and an obtained fluidizing processed soil is stored in a storing vessel 8. Thus the fine component regulation of processed soil, regulating muddy water, solidifying material component and weight ratio can be simply carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention is intended to mix and mix water or muddy water and a solidified material into residual soil generated at a construction site, to fluidize it, fill it up after construction, backfill it into a structure, fill it into a cavity, etc. TECHNICAL FIELD The present invention relates to a method and an apparatus for producing a fluidized soil treated with mud (hereinafter, referred to as fluidized treated soil).

[0002]

2. Description of the Related Art At construction sites, backfilling after construction,
To perform backfilling, filling, etc., the remaining soil generated at the site,
Recently, fluidized treated soil mixed with water or muddy water and a solidifying material such as cement and fluidized has attracted attention, and has been used for these operations.

[0003] The fluidized soil is made up of residual soil generated at the site or residual soil brought in from another site (hereinafter referred to as soil to be treated) and water or muddy water prepared by adjusting clay, silt, etc. at a predetermined ratio. Hereinafter, this will be referred to as "adjusted muddy water") and a solidifying material such as cement.

[0004] However, the soil to be treated may contain excessive foreign matters such as looseness and gravel, and it is necessary to remove these foreign substances in advance when producing the fluidized treated soil. For this reason, first, the soil to be treated is sieved to remove the foreign matter. However, the soil and the lump attached to the foreign matter are also removed together with the foreign matter, and there is a problem that the soil to be treated is reduced.

Although it is originally desirable to use only the soil generated at the construction site as the soil to be treated, there are cases in which the soil brought in from another site or the like must be used. For this reason, soils having different properties are used, and in order to obtain a predetermined ground strength, the soil to be treated,
Fine adjustment of the adjusted muddy water, the components of the solidifying material, the weight ratio, etc., is required.

[0006] Further, the above-mentioned components in the field,
In order to produce fluidized soil that requires fine adjustment of the weight ratio and the like, it is desirable to automate the process.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a method for manufacturing fluidized soil by efficiently removing extraneous foreign substances such as looseness and gravel contained in the soil to be treated and adjusting the properties of the soil at the site. In addition, in order to obtain a desired ground strength, fine components such as soil to be treated, adjusted muddy water, solidified material components, and weight ratio are adjusted.

[0008]

The method for producing fluidized soil according to the present invention comprises a first kneading step of mixing the soil to be treated with water or a prepared muddy water, and a method of producing a mixture of the resulting mixture, such as rags and gravel. And a second kneading step of adding a solidifying material such as cement to the mixture that has passed through the sieving step, and further adding water or adjusted muddy water to mix.

The present invention also provides a first kneading tank for mixing the soil to be treated with water or adjusted muddy water, and removing excessive foreign substances such as looseness and gravels from the mixture discharged from the first kneading tank. And a second kneading tank for adding a solidifying material to the mixture passing through the vibrating sieve and adding water or adjusted muddy water and mixing the mixture. is there.

Further, the apparatus according to the present invention automates the process and arranges the first kneading tank, the vibrating sieve and the second kneading tank in order from the top of the apparatus, and transfers the mixture between the apparatuses. Is performed using the weight of the mixture.

In the present invention, the kneading process has two stages,
The sieving process was set in the middle because the soil attached to the garbage etc. during sieving as described above,
In order to prevent the soil mass from being removed at the same time, first add water or muddy water to the soil to be treated, knead and fluidize it, and then remove only extraneous foreign matter such as looseness and gravel. .

[0012] The kneading tank and the vibrating sieve are vertically arranged vertically for the following reason. That is, in the past, when producing fluidized soil, the mixture was transferred by a pump, but this pump often failed, and the operating rate of the apparatus was sometimes reduced. Therefore, as a means of transferring the mixture without using a pump, utilizing the weight of the mixture, that is, gravity,
It is to be dropped sequentially from the top.

Further, by arranging the apparatus as described above, a large installation area is not required unlike the conventional apparatus, and as a result, the production of the fluidized soil, backfilling, backfilling, etc. can be continuously performed on site. It is also possible to do it.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an external view showing an apparatus for producing fluidized soil according to the present invention, and FIG. 2 is a system diagram thereof. The present apparatus comprises: a first kneading tank 1 for mixing and kneading the soil to be treated with water or adjusted muddy water; a bucket elevator 2 for charging the soil to be treated into the first kneading tank 1; Vibrating sieve 3 for removing excessive foreign substances such as looseness and gravels from the discharged mixture; solidifying material and water or adjusted mud are added to the mixture discharged from vibrating sieve 3;
A second kneading tank 4 for kneading, a cement silo 5 for supplying a solidifying material to the second kneading tank 4, a mud tank 6 and a water tank 7 for supplying adjusted muddy water and water to each kneading tank,
It has a storage tank 8 for storing the fluidized soil obtained in the second kneading tank 4, a control unit 9 for controlling the present apparatus, and a measuring device (load cell) 10 for the weight of the mixture, which is installed in each kneading tank. I have.

As shown in FIG. 1, in the present apparatus, the bucket elevator 2 is configured to be movable in the horizontal direction in order to convey the soil to be treated carried from a backhoe or the like (not shown) to a position directly below the first kneading tank 1. I have.

FIG. 3 is a flowchart showing a process for producing the fluidized soil according to the present invention.

Next, a production procedure of the fluidized soil according to the present invention will be described with reference to FIGS.

First, a grain size test of the soil to be treated is performed, and the soil to be treated is fine-grained soil (clay, soil containing silt content of 40 to 60% or more) or sandy soil (clay, silt content is 40%). Check if it is the following soil). As a result, when it is determined that the soil is fine-grained, water and, if necessary, adjusted mud are added. On the other hand, in the case of sandy soil, adjusted mud is added. Thereafter, a blending test is performed to determine the mixing ratio of the soil to be treated, water or prepared muddy water, and the solidifying material to obtain a treated soil having desired properties.

Next, the soil to be treated is put into the first kneading tank 1 from the bucket elevator 2, the weight of the degree of treatment is measured by the load cell 10 provided in the kneading tank, and then adjusted from the muddy water tank 6 and the water tank 7. Inject muddy water and water. In addition,
The amount of the adjusted muddy water and water is about 40 to 80% of the amount determined in advance by the blending test. Thereafter, the soil to be treated, the adjusted muddy water and the water are kneaded. After completion of the kneading, the obtained mixture is sent to the vibrating sieve 3 to remove excessive foreign matters such as looseness and gravels, and then charged into the second kneading tank 4. After the introduction, the weight is measured again by the load cell 10 provided in the second kneading tank 4, the required amount of muddy water is obtained from the obtained weight value, and this value and the muddy water added in the first kneading tank 1 are obtained. Determine the difference from the volume and add the adjusted mud or water based on this. Thereafter, a predetermined amount of the solidified material is supplied from the cement silo 5 and kneaded.
Finally, the obtained fluidized soil is discharged into the storage tank 8.
The fluidized soil in the storage tank 8 is discharged to the outside by the pump 16. The flows of the soil to be treated, the solidified material, the water or the prepared muddy water and the fluidized soil in this step are indicated by solid-line arrows in FIG.

The above steps are performed automatically by computer control in the control unit 9 according to the procedure shown in FIG.

In the present apparatus, it is also possible to produce adjusted muddy water. The process of manufacturing the adjusted muddy water is as follows. First, fine-grained soil containing clay, silt, or the like is put into the first kneading tank 1 from the bucket elevator 2, a predetermined amount of water is added from the water tank 7, and kneading is performed. Next, the obtained mixture is sent to the vibrating sieve 3 and sieved. Then, water is added again in the second kneading tank 4 to perform kneading. After that, the obtained adjusted muddy water is sent to the muddy water tank 6 by the pump 21 through the storage tank 8. The fine-grained soil in this process,
The flow of water and conditioning mud is shown by the dashed arrows in FIG.

[0023]

Next, an embodiment of the apparatus according to the present invention will be described in detail.

The specifications of the main apparatus in this embodiment are as follows. (1) First kneading tank capacity 1000 l rotation speed 30 rpm motor driven (2) Second kneading tank 4 capacity 1500 l rotation 180 rpm motor driven (3) Storage tank capacity 3000 l with motor driven stirrer (4) Bucket elevator input capacity 60m ³ / h (5) Cement silo 30t / h or more (6) Water tank capacity 30m ³ (7) Mud tank capacity 30m ³

The capabilities of the apparatus are as follows. (1) Primary kneading Measuring time 30sec Kneading time 60sec Discharge time 10sec Other 15sec Cycle time 115sec Capacity per hour 31.3m ³ / h (10 per cycle)
(In case of 00 l) (2) Secondary kneading Measuring time 32 sec Kneading time 60 sec Discharge time 20 sec Other 15 sec Cycle time 127 sec Capacity per hour 36.3 m ³ / h (12 per cycle)
82 l)

Next, an example of the composition in the production of fluidized soil is shown in the following table. Tables 1 and 2 show the blended amounts of the adjusted mud, and Tables 3 and 4 show the blended amounts at the time of producing the fluidized soil using the adjusted mud.

[0027]

[Table 1]

[0028]

[Table 2]

[0029]

[Table 3]

[0030]

[Table 4]

Next, the measuring time of each step of the fluidized soil production is shown in the following table.

[0032]

[Table 5]

[0033]

[Table 6]

As described above, with the device according to the present invention,
The production of the fluidized soil can be performed in a relatively short time, and the automation of the process enables efficient production with a small number of workers.

Further, since the present apparatus can be installed even in a relatively narrow place, by installing the apparatus on site, fluidized soil is produced on the spot and immediately backfilled, backfilled,
Work such as filling can be performed, and the efficiency of the entire construction work can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an apparatus for producing a fluidized soil treated with mud according to the present invention.

FIG. 2 is a system diagram of an apparatus for producing a fluidized soil treated with mud according to the present invention.

FIG. 3 is a flowchart showing a production process of a fluidized soil treated with mud according to the present invention.

[Explanation of symbols]

 1 First kneading tank 2 Bucket elevator 3 Vibrating sieve 4 Second kneading tank 5 Cement silo 6 Mud tank 7 Water tank 8 Storage tank 9 Control unit 10 Load cell 11, 12, 13, 14, 15 Motor 16 Transfer pump 17 Cleaning Pump 18 Submersible mixer 19 Mud pump 20 Water pump

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noriyuki Mori 1, Asahi, Oaza, Tsukuba, Ibaraki Prefecture Within the Public Works Research Institute, Ministry of Construction (72) Inventor Goro Kuno 1-6-34 Konan, Minato-ku, Tokyo Japan Construction Industry Management Association, Central Technical Research Institute (72) Inventor Jotaro Iwabuchi 1-34, Konan, Minato-ku, Tokyo Japan Construction Management Association, Central Technology Research Institute (72) Inventor Tatsuya Mitsui 1-chome, Konan, Minato-ku, Tokyo No. 6-34 Inside the Japan Construction Industry Management Association Central Technical Research Institute

Claims (3)

[Claims] 1. A method of manufacturing a fluidized soil treated by mixing a construction surplus soil, water or muddy water, and a solidifying material, a first kneading step of mixing the construction surplus soil and water or muddy water, A sieving step of removing excessive foreign substances from the mixture obtained in the first kneading step, and a second kneading step of adding a solidifying material to the mixture passed through the sieving step and adding water or muddy water to mix the mixture. And a method for producing a fluidized soil treated with mud. 2. A muddy-type fluidized treated soil production apparatus comprising a construction surplus soil, water or muddy water, and a solidified material, comprising: a first kneading tank for mixing the construction surplus soil with water or muddy water. A vibrating sieve for removing excessive foreign matter from the mixture discharged from the first kneading tank; and a second kneading for adding a solidifying material to the mixture passing through the vibrating sieve and adding water or muddy water to mix. A muddy-type fluidized treated soil production device with a tank. 3. The method of claim 2, wherein the first kneading tank, the vibrating sieve and the second kneading tank are arranged in order from the top of the apparatus. apparatus.