JPH0755495B2 - Excess soil cement recycling plant - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant (in this specification, a plant for reusing surplus soil cement) for reusing surplus soil cement that is industrial waste.

[0002]

2. Description of the Related Art Conventionally, a complete replacement method using mortar (pre-packed method) has been adopted as a column wall construction method, but the range of use has become narrower from the viewpoint of water stoppage, workability, and economic efficiency. However, as an alternative to this method, the multi-axis perforation method for column-row wall construction is often used.

In this method, a continuous hole is drilled in the ground by a multi-axis type auger machine, and at the time of drilling, cement milk is pumped and injected, and a mixture of this cement milk and in-situ soil (hereinafter, simply , Soil cement), to form a continuous column. In this construction method,
A group of holes (hereinafter, simply referred to as a group hole) is drilled at regular intervals by an auger machine, and the drilled holes are connected by another group hole to form a continuous column. That is, the excavating shaft at the end of the auger machine is reinserted into the hole located at the end of the formed group holes that are still in solution (the holes are filled with soil cement), and the holes are inserted between the group holes. A new group hole is being formed.

However, although this method can solve the above-mentioned problems such as water stoppage, since soil cement overflowing from the opening of the hole when the excavation shaft is inserted is applied as industrial sludge to industrial waste, A large amount of cement milk is wasted and it causes a problem of treating soil cement as industrial waste. Incidentally, the above problem similarly occurs in the pile construction method, ground improvement method and the like as long as soil cement is used.

[0005]

Therefore, in the present invention, it is possible to reduce industrial waste by using soil cement for recycling, and a soil cement body having a predetermined uniaxial compressive strength (for example, a column row). It is an object of the present invention to provide a recycling plant for excess liquid, which can economically construct walls, piles, ground improvement bodies, etc.).

[0006]

The invention according to claim 1 is to separate and remove most of the sediment from surplus soil cement to produce a reused liquid containing cement components, and a raw material for cement milk. A weighing section for weighing an appropriate amount of water, bentonite, and solidifying material separately and measuring an appropriate amount of the reused liquid corresponding to the amount of the raw material, and the raw material and the reused liquid measured in the measuring section. And a mixing section for mixing to make cement milk.

The invention according to claim 2 relates to the invention according to claim 1, further comprising a concentration detection section for detecting the concentration of the solidified material in the reused liquid and for confirming the strength of the soil cement body in advance. There is. The invention according to claim 3 is the same as the invention according to claim 2, further comprising a concentration detection section for detecting the concentration of the solidified material in the mixed liquid produced in the mixing section.

[0008]

The present invention operates as follows. (Operation of the invention according to claim 1) If the cement concentration of the reused liquid is detected, it becomes possible to determine the required amount of the solidifying material which is the raw material of the cement milk, and it has been conventionally treated as industrial waste. Utilizing soil cement, a soil cement body having a predetermined uniaxial compressive strength (for example,
Pillar wall, pile, ground improvement body, etc.) can be economically constructed. (Operation of the invention according to claim 2) When the cement concentration of the reused liquid is detected by the concentration detection section, it becomes possible to determine the required amount of the solidifying material which is the raw material of the cement milk, and it has been conventionally treated as industrial waste. By using soil cement, a soil cement body having a predetermined uniaxial compressive strength (for example, column wall, pile, ground improvement body, etc.) can be economically constructed. (Operation of the invention according to claim 3) Since the concentration detecting section can detect the concentration of the solidified material of the mixed liquid produced in the mixing section, the soil cement to be constructed in addition to the operation according to claim 2 described above. It has the effect that the body can be made uniform according to the plan.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the drawings shown as embodiments. As shown in FIG. 1, the excess liquid recycling plant of this embodiment separates and removes most of the earth and sand from the soil cement that overflows from the opening of the excavation hole H to produce a recycling liquid containing a cement component. Separation section 1, weighing section 2 for weighing water, bentonite, and solidifying material as raw materials for cement milk separately, and weighing recycled liquid in an appropriate amount corresponding to the amount of the raw material, and weighing section 2 Mixing section 3 for producing cement milk by mixing the raw material and the reused liquid measured in step 1, and a concentration detection device 5 for detecting the cement concentration in the reused liquid (corresponding to the concentration detection section of the invention according to claim 2) And a concentration detecting device 6 for detecting the concentration of the solidified material in the mixed liquid produced in the mixing section 3 (paired with the concentration detecting section of the invention according to claim 3). ) And it is constituted with a formulation milk made with mixing sections 3 from the stirring reservoir 7 for can be stored in a stirred state. still,
When the plant for reusing the excess liquid is used for the columnar wall construction method of the perforation method, as shown in the figure, the soil cement overflowing from the opening of the excavation hole H is treated with the coarse sieve 11a.
A pipe for pressure feeding is connected to the upper part, and the stirring storage tank 5 and the auger 80 of the excavator 8 are connected by pipes.

The separation section 1 is, as shown in FIG.
Primary treatment liquid tank 10a and secondary treatment liquid tank 10b
And a group of tanks for the third treatment liquid (reuse liquid tank) 10c, a coarse sieve 11a, a medium sieve 11b, and a fine sieve 11c (a configuration having one to multiple stages can be adopted depending on the soil quality). It is composed of an electric vibrating screen 11 having three and three cyclones 12a, 12b, 12b (one to many configurations can be adopted depending on the soil quality), and each device is connected by piping as shown in the same figure. And the processing liquid is pump P
It can be sent by pressure.

The primary treatment liquid refers to the liquid component when passing through the coarse sieve 11a portion of the electric vibration sieve 11, and the secondary treatment liquid when passing through the cyclone 12a further than the primary treatment liquid. A liquid component refers to a liquid component when the tertiary treatment liquid further passes through the cyclone 12b than the secondary treatment liquid, the primary treatment liquid, the secondary treatment liquid, the tertiary treatment liquid, surplus soil and separation. The composition (weight ratio) of earth and sand is as shown in Table 1 (experimental data at two sites).

[0012]

[Table 1]

As can be seen from Table 1, the components of the tertiary treatment liquid to be reused are fine sand (7%), clay (6%), cement (7%) and water (80%). Made of The metering section 2 and the mixing section 3 are functionally combined in consideration of downsizing of the entire plant, and these sections are, as shown in FIG.
0, a bentonite tank 21, a water tank 22, and a mixer 30 (a mixer 30 is hung by a load cell) as a measuring device, and the cement tank 20 and the bentonite tank 21 can be finely adjusted. The cutting device 25 is provided with an opening / closing valve 26 in the discharge pipe of the water tank 22. The operation of the cutting device 25 and the opening / closing valve 26 is performed by the mixer 3
Control panel N is linked with the output of the load cell
The weights of the cement, bentonite, and water put into the mixer 30 can be determined by operating the.

The metering section 2 and the mixing section 3 described above may be configured as one section as described above, but are not limited thereto and may be configured as separate sections. As shown in FIG. 1, the concentration detecting device 5 is provided in a pipe path between the tertiary treatment liquid tank 10c and the mixer 30 (which is not limited to this and is disposed in the tertiary treatment liquid tank 10c. The cement concentration contained in the tertiary treatment liquid can be detected during the pressure feeding of the tertiary treatment liquid. Then, based on the cement concentration value of the reused liquid detected by the concentration detection device 5, the required amount of cement, which is the raw material of cement milk, is calculated and can be input and set in the control panel N.

As the concentration detecting section, an acid-alkali titration method can be adopted. Concentration detection device 6
As shown in the figure, it is provided in the agitation storage tank 7 which will be described later so that the column wall formed by knowing the properties of the above mixed liquid can be made uniform in conformity with the plan.

Further, in this embodiment, a device for detecting the viscosity, specific gravity and solid content concentration of the reused liquid is provided (not shown). Here, from the data of the tertiary treatment liquid in Table 1, the components of the experimental liquid as the reuse liquid in the indoor experiment are
80% moisture, 7% solidifying material (Sample Nos. 1-7 are Asano Clean Set, Sample Nos. 8-10 are ordinary cement,
I am using each. ), And soil content of 13% to prepare a mixed milk by mixing with a new liquid, and when this is mixed with the sample soil, the uniaxial compressive strength (age 7 days, 28 days) is shown in Tables 2 and 3. In addition, the experimental liquid is a mixture of soil, solidifying material, and water,
The one left for 3 hours is used.

[0017]

[Table 2]

[0018]

[Table 3]

From these Tables 2 and 3, when the reused liquid is used as additional water, the uniaxial compressive strength (age 7 days, 2
8 days) is greatly improved, and it can be seen that the column wall having a predetermined uniaxial compressive strength can be economically constructed when the reused liquid is used as the solution containing the solidifying material.

[0020]

The present invention having the above-mentioned structure has the following effects. From the description in the action column,
Industrial waste can be reduced by using soil cement for recycling, and it has a certain uniaxial compressive strength (ceiling wall, pile, ground improvement body, etc.)
It is possible to provide a recycling plant for excess liquid that can be constructed economically.

[Brief description of drawings]

FIG. 1 is a flowchart of a plant for recycling excess liquid according to an embodiment of the present invention.

[Explanation of symbols]

 1 Separation section 2 Weighing section 3 Mixing section 5 Concentration detector 6 Concentration detector

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 000168506 Minken Kogyo Co., Ltd. 1-29-15 Chuo, Nakano-ku, Tokyo (72) Inventor Shigeo Maekawa 1-Chome, Kitamahama 1-chome, Chuo-ku, Osaka, Osaka Sato Industrial Co., Ltd.Osaka Branch (72) Inventor Kenkichi Moriyama 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Sato Industry Co., Ltd., Engineering Department, Civil Engineering Headquarters (72) Inventor Kiyoshi Sato Shichida Mita, Atsugi, Kanagawa Prefecture San Sato Kogyo Co., Ltd. Central Technology Research Institute (72) Inventor Masashi Nabeya 47-3 Mita Atsugi, Kanagawa Prefecture Sato Kogyo Co., Ltd. Central Technology Research Center (72) Inventor Yoshinori Muto 1-chome Funabashi Honcho, Hirakata City, Osaka Prefecture Address: 751 Incorporated company, Bando Co., Ltd. (72) Inventor Naoto Toda 1-6-1 Otemachi, Chiyoda-ku, Tokyo Nippon Cement Co., Ltd. Lean Set Division (72) Inventor Shoji Makino 4-8-2 Sakuragawa, Naniwa-ku, Osaka City, Osaka Prefecture Hokuto Engineering (72) Inventor Kenichi Mochihara 1-14-8, Usumotocho, Nishi-ku, Osaka City, Osaka Prefecture Osaka Branch Co., Ltd.

Claims (4)

[Claims] 1. A separation section for separating and removing most of earth and sand from surplus soil cement to produce a reuse liquid containing cement components, and water, bentonite, and solidifying material, which are raw materials for cement milk, in appropriate amounts. It comprises a weighing section for weighing and measuring an appropriate amount of the recycled liquid in correspondence with the amount of the raw material, and a mixing section for mixing the raw material and the recycled liquid measured in the measuring section to produce cement milk. Reused plant for surplus soil cement. 2. The reuse of the excess liquid according to claim 1, further comprising a concentration detection section for detecting the concentration of the solidified material in the reuse liquid and for confirming the strength of the soil cement body in advance. plant. 3. The excess soil cement recycling plant according to claim 2, further comprising a concentration detection section for detecting the concentration of the solidified material in the mixed liquid produced in the mixing section. 4. The reuse plant for excess soil cement according to claim 2, further comprising a device for detecting viscosity, specific gravity and solid content concentration of the reused liquid.