JPH0673377A - Apparatus for preparing grout - Google Patents

Abstract

PURPOSE:To improve workability by installing a chemical preparation apparatus having a liq. suction part and a liq. delivery part at the bottoms of two or more liq. vessels, delivering through the delivery part a liq. chemical sucked at the suction part, and mixing and stirring the chemical by circulating it in the liq. vessel. CONSTITUTION:Liq.B is prepd. by supplying a specified amt. of water through a supply pipe 7 to a liq. B preparation vessel 23, adding a specified amt. of a hardening agent to the water under stirring by liq. circulation with a stirring apparatus 4, and thereby dissoving the agent in the water. Liq.B is transferred with a transfer apparatus 3 to a liq.B storage vessel 24 where liq.B is stored. Liq.B from the storage vessel 24 and water are supplied to a liq.B preparation vessel 25 and by liq. circulation under stirring, and the resulting mixture is transferred to a liq.B storage vessel 26. Then, liq.B contg. the hardening agent is injected from the delivery pipe 28 through a chemical-switching apparatus 6. On the other hand, liq.A is prepd. by supplying Na2SiO3 through a supply pipe 8 to a liq.A preparation vessel, supplying water, and stirring by liq. circulation, and is transferred to a liq.A storage vessel 22. Then, liq.A contg. water glass is injected from the delivery pipe 28 through the chemical switching apparatus 6.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a soil stabilization method for strengthening and stabilizing soil quality by injecting a water glass grout agent obtained by mixing liquid A and liquid B into soil. The present invention relates to an apparatus for preparing liquid A and liquid B.

[0002]

2. Description of the Related Art Generally, in order to reinforce soil quality or to stop water leakage, etc., water glass-based grout agents are injected into the soil to gel the water glass and strengthen and stabilize the soil quality. The construction method is known.

Conventionally, in order to automatically mix and continuously supply the liquid A and the liquid B used in this method, a mixing device having a mixing tank and a storage tank and an agitating device provided in each tank is provided. Is proposed. In other words, this compounding device enables continuous supply of the drug solution prepared by mixing the drug solution prepared in the compound tank into the compound tank, transferring the compound solution to the tank, and keeping the tank always filled with the drug solution. is there. Then, in the mixing tank, the chemical liquid is mixed and stirred by a stirring device using a propeller. Further, even in the storage tank, the chemical solution is kept homogeneous by a stirring device using a propeller.

[0004]

However, in the case of the above-mentioned conventional mixing apparatus, since a stirring device by a propeller is provided in each tank, it is necessary to arrange a drive motor or the like above each tank, which is particularly high. The size will be increased in the vertical direction. As a result, there is an inconvenience that the piping and the like are restricted and the work efficiency is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a compounding device for ground injection chemical liquid which can be downsized by stirring by liquid circulation.

[0006]

[Means for Solving the Problems] A device for preparing a chemical liquid for ground injection according to the present invention for solving the above problems is a liquid A containing sodium silicate and a liquid B containing a water-soluble curing agent for water glass. A device equipped with a plurality of liquid tanks for mixing and storing a liquid A and a liquid B used in a soil stabilization method of injecting a water glass-based grout agent obtained by mixing the liquid with a liquid And a chemical liquid preparation device having at least a liquid absorbing part and a liquid discharging part is arranged at the bottom of one or more liquid tanks, and the liquid medicine in the liquid tank sucked from the liquid absorbing part is discharged from the liquid discharging part, The mixing and agitation are performed by circulating the liquid in the liquid tank.

As the sodium silicate contained in the above-mentioned liquid A, usually, No. 3 sodium silicate defined in JIS K 1408 is preferably used, but No. 1 sodium silicate or No. 2 sodium silicate or 3. It is also possible to use sodium silicate equivalent to No. 5 or the like.

As the water-soluble curing agent for water glass contained in the liquid B, at least one selected from the group consisting of inorganic acids, organic acids, inorganic acid salts, inorganic normal salts, glyoxal and ethylene carbonate should be used. You can

Of these, the water-soluble inorganic acid, organic acid, inorganic acid salt, and inorganic normal salt are not particularly limited as long as they are water-soluble. Specifically, for example, the inorganic acid is sulfuric acid,
Hydrochloric acid, nitric acid, phosphoric acid, boric acid, carbonic acid and the like, organic acids include acetic acid, oxalic acid, formic acid, propionic acid, butyric acid, valeric acid, acrylic acid, malonic acid, succinic acid, glutamic acid,
Adipic acid, glycolic acid, tartaric acid, citric acid, malic acid and the like, and as inorganic acid salts, sodium dihydrogen borate, sodium hydrogen carbonate, disodium hydrogen phosphate, sodium dihydrogen phosphate, sodium hydrogen sulfate, Representative examples are alkali metal acid salts such as potassium hydrogen carbonate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, and potassium hydrogen sulfate. Moreover, as an inorganic normal salt, potassium chloride and sodium chloride are typically mentioned.

[0010]

According to the present invention, since the chemical liquid preparation device having at least the liquid absorbing portion and the liquid discharging portion is arranged at the bottom of the liquid tank, the chemical liquid in the liquid tank sucked from the liquid absorbing portion is discharged. It is possible to perform mixing and stirring by discharging from the liquid portion and circulating the liquid in the liquid tank.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the overall structure of a ground injection chemical liquid blending device (hereinafter simply referred to as a blending device) 1.

That is, the blending apparatus 1 comprises a solution A containing sodium silicate and a B _S solution containing a curing agent for instantaneous mixing or a B composition for slow mixing prepared by diluting the B _S solution.
Water glass grout agent obtained by mixing with _L liquid,
In the soil stabilization method of injecting into soil, A liquid, B _S
A device for preparing a liquid and a B _L liquid, wherein the inside of the liquid tank main body 2 is divided into desired volumes, and the A liquid mixing tank 21, the A liquid storage tank 22, the B _S liquid mixing tank 23, with B _S solution storage tank 24, B _L solution preparation tank 25 and B _L solution storage tank 26 is formed in one step parallel to the liquid tank main body 2, the transfer device 3, a stirring device 4, and the transfer or switchable circulation stirring A new transfer / circulation stirring device 5 is provided.

Of these, the bottoms of the A liquid mixing tank 21, the B _S liquid mixing tank 23, the B _S liquid storage tank 24, and the B _L liquid mixing tank 25 are
A liquid pool 27 is provided as a recess, and the transfer device 3, the stirring device 4, and the transfer / circulation stirring device 5 can be arranged in the liquid pool 27. Furthermore, A liquid storage tank 22 and B _S liquid storage tank 2
4 and _BL liquid storage tanks 26 are provided with discharge pipes 28 at the bottoms thereof, and the chemical liquids in these tanks are guided to the chemical liquid switching device 6.

The transfer device 3 includes a submersible pump 31 and the submersible pump 31.
And a transfer pipe 32 connected to the pump 31
ing. This transfer device 3 has a submersible pump 31_SLiquid condition
Arranged so as to be inserted into the liquid pool 27 of the mixing tank 23.
And the B_SB in the liquid mixing tank 23 _SDerivation of liquid from transfer pipe 32
B was done_SThe liquid is transferred to the liquid storage tank 24.

As shown in FIGS. 2 and 3, the stirrer 4 comprises a submersible pump 41, a discharge pipe 42 and a connecting pipe 43 connecting these. Of these, the discharge pipe 42 is branched from the connection pipe 43 in a T shape, and a discharge port 44 inclined downward at 45 ° is provided at a tip end of the discharge pipe 42 in opposite directions. The stirring device 4 is arranged so that the submersible pump 41 is inserted into the liquid pool 27 of the B _S liquid mixing tank 23 so that the B _S liquid discharged from the discharge port 44 is discharged obliquely to the side wall. Has been done. That, B _S which is formulated in B _S solution blending tank 23
The liquid is sucked up by the submersible pump 41 from the bottom of the B _S liquid mixing tank 23, passes through the connection pipe 43 and the discharge pipe 42, and is discharged from the discharge port 4.
4 will be exhaled. Then, the exhaled B _S liquid, along the sidewalls of B _S liquid preparation tank 23 will be caused to flow clockwise rotation direction in FIG. 2, B _S solution B _S liquid preparation tank 23 are mixed and stirred The Rukoto. Specifically, for example, 31 kg of a powdery curing agent (a mixture of potassium hydrogen carbonate and sodium hydrogen carbonate) in 292 liters of water is mixed and stirred at a discharge rate of 200 liters / minute, and the mixture is stirred for about 5 minutes. It can be completely dissolved in. In the case of the stirring device 4, since the center point of the discharge pipe 42 is the center of water flow rotation, the center point of the discharge pipe 42 is B _S.
Setting to be placed in the center of the liquid mixing tank 23
It is preferable in that a laminar flow region is not formed in the B _S liquid mixing tank 23. Further, it is desirable that the B _S liquid mixing tank 23 has a shape with no corners or a cylindrical shape in that a laminar flow region is not formed.

The stirrer 4 is also arranged in the A liquid storage tank 22 to mix and stir the A liquid in the A liquid storage tank 22. However, since the A liquid that has already been prepared is filled in the A liquid storage tank 22, it is not necessary to perform active mixing and stirring unlike the stirring device 4 provided in the B _S liquid mixing tank 23. Therefore, the submersible pump 41 also has a liquid pool 2
Instead of arranging in No. 7, the liquid A storage tank 22 is directly arranged, and the discharge pipe 42 and the discharge port 44 are also projected in only one direction, so that the inside of the liquid A storage tank 22 is gently mixed and stirred. Has been done.

The transfer / circulation stirring device 5 is an underwater pump 51.
A branch pipe 54 connected to the submersible pump 51 and branched into a transfer part 52 and a circulation part 53; a discharge pipe 55 connected to the tip of the circulation part 53 of the branch pipe 54; And a solenoid valve 56 for opening and closing the transfer section 52 and the circulation section 53. Of these, the discharge pipe 55 has a discharge port 57 protruding in only one direction, like the discharge pipe 42 of the stirring device 4 arranged in the liquid A storage tank 22, and gently mixes and stirs the inside of the liquid tank. It is designed to do. The transfer / circulation stirring device 5 is arranged so that the submersible pump 51 is inserted into the liquid pool 27 of the A liquid mixing tank 21, and in this arrangement state, the circulation unit 53 is located in the A liquid mixing tank 21. The transfer part 52 is led out to the A liquid storage tank 22. By switching the electromagnetic valve 56, the A liquid in the A liquid mixing tank 21 can be circulated and stirred in the A liquid mixing tank 21, or can be transferred to the A liquid storage tank 22. Also, B _S solution also is transported and circulation stirrer 5 is arranged similarly to the storage tank 24, the B _S solution B _S liquid storage tank 24, or by circulating stirred at the B _S water reservoir within 24, B _L liquid formulation It is designed to be transferred to the tank 25. Furthermore, B _L solution also is transported and circulation stirrer 5 is arranged similarly to the preparation tank 25, a B _L solution B _L solution preparation tank 25,
The B _L liquid mixing tank 25 is circulated and stirred, or is transferred to the B _L liquid storage tank 26.

Further, in the compounding device 1 thus constructed, electrodes (not shown) for detecting the amount of the chemical liquid in each tank are shown.
Also, a control device for controlling the whole is provided, and the whole is automatically controlled.

Further, the A liquid mixing tank 21 and the B _S liquid mixing tank 23
Further, a water supply pipe 7 used for preparing each chemical solution is introduced into the B _L liquid preparation tank 25, and a sodium silicate supply pipe 8 is introduced into the A liquid preparation tank 21.

Next, the operation of the blending apparatus 1 thus configured will be described.

First, in the B _S liquid mixing tank 23, water is supplied from the water supply pipe 7. The supply amount of water is controlled by an electrode (not shown), and when it reaches a predetermined amount, the electrode (not shown) is activated and the supply of water from the supply pipe 7 is stopped. Next, the liquid circulation stirring by the stirring device 4 is started,
A chime, a pilot lamp, and the like (not shown) instruct the introduction of the curing agent. Then, after charging a predetermined amount of the curing agent, a charging completion button (not shown) is pressed.
Then, the instruction to add the curing agent is stopped. Then, the liquid circulation stirring by the stirring device 4 is continued, the curing agent is dissolved, and the preparation of the B _S liquid is completed. And B _S liquid mixing tank 2
The signal from the B _S liquid storage tank 24 is awaited while the B _S liquid in 3 is being circulated and stirred. When receiving a signal from the B _S solution storage tank 24, the liquid circulating stirring is stopped transferring device 3 is operated by the stirring device 4, B in B _S solution blending tank 23
All _S liquid is supplied to the B _S liquid storage tank 24. Then, the above operation is repeated.

B_SIn the liquid storage tank 24, the transferred B_SLiquid
Stored. This B_SLiquid is stored in the electrode (not shown)
Therefore, the electrode is controlled when it reaches a predetermined amount (not shown)
Is activated, B_SB from the liquid mixing tank 23_SInstruct to supply liquid
To do. This instruction is B_SB of liquid mixing tank 23_SOne liquid
B to the extent that they can be put together_SLiquid in liquid storage tank 24
Issued when the amount is reduced. However, B_SLiquid storage tank 24
Then B_SSince the liquid is used continuously, B_SLiquid storage tank 24
If this instruction is given when the amount of liquid in the
B used for entry work_SThe liquid will bottom out.
It Therefore, B _SIn the liquid storage tank 24, some B_Sliquid
This instruction is issued after securing the remaining amount of. Also, B_S
B in the liquid storage tank 24_SThe liquid is the first B after the start of operation of the device._S
Liquid circulation by transfer / circulation stirring device 5 from the end of liquid storage
Since stirring is continued, B_SB in the liquid storage tank 24_Sliquid
Will be managed in a homogeneous state. And the discharge pipe 2
8 through B via the liquid chemical switching device 6_SLiquid injection work is performed
Be done. Also, B_SPart of the liquid is B_LUsed to formulate liquids
Therefore, the liquid circulation stirring of the transfer / circulation stirring device 5 is stopped
Replaced by B_LIt is supplied to the liquid mixing tank 25.

[0024] In B _L solution preparation tank 25, through a supply tube 7 for the water together with the water is supplied, B _S solution from B _S solution storage tank 24 is supplied. Both are sufficiently mixed by the liquid circulation stirring by the transfer / circulation stirring device 5, and the preparation of the B _L liquid is completed. Then, B _L of B _L solution preparation tank 25
While the liquid is being circulated and stirred, a signal from the _BL liquid storage tank 26 is waited for. When the signal from the _BL liquid storage tank 26 is received, the liquid circulation stirring by the transfer / circulation stirring device 5 is switched to transfer, and all the _BL liquid in the _BL liquid preparation tank 25 is supplied to the _BL liquid storage tank 26. To be done. Then, the above operation is repeated.

B_LIn the liquid storage tank 26, the transferred B_LLiquid
Stored. This B_LLiquid is stored in the electrode (not shown)
Therefore, the electrode is controlled when it reaches a predetermined amount (not shown)
Is activated, B_LB from liquid mixing tank 25_LInstruct to supply liquid
To do. This instruction is B_LB of liquid mixing tank 25_LOne liquid
B to the extent that they can be put together_LLiquid in liquid storage tank 26
Issued when the amount is reduced. However, B_LLiquid storage tank 26
Then B_LSince the liquid is used continuously, B_LLiquid storage tank 26
If this instruction is given when the amount of liquid in the
B used for entry work_LThe liquid will bottom out.
It Therefore, B _LIn the liquid storage tank 26, some B_Lliquid
This instruction is issued after securing the remaining amount of. And vomiting
B from the outlet pipe 28 via the chemical liquid switching device 6_SLiquid injection work
Is done.

In the liquid A mixing tank 21, sodium silicate is supplied from the sodium silicate supply pipe 8. The supply amount of this sodium silicate is controlled by an electrode (not shown), and when it reaches a predetermined amount, the electrode (not shown) is activated and the supply of sodium silicate from the sodium silicate supply pipe 8 is stopped. It Then, the supply of water is instructed.
The water supply amount is controlled by an electrode (not shown), and when the predetermined amount is reached, the electrode (not shown) is activated and the water supply is stopped. Next, the liquid circulation stirring by the transfer / circulation stirring device 5 is started, both are sufficiently mixed, and the preparation of the liquid A is completed. Then, the liquid from the liquid A storage tank 22 is waited for while the liquid A in the liquid A mixing tank 21 is being stirred. When the signal from the A liquid storage tank 22 is received, the liquid circulation stirring by the transfer / circulation stirring device 5 is switched to transfer, and all the A liquid in the A liquid preparation tank 21 is transferred to the A liquid storage tank 2.
2 is supplied. Then, the above operation is repeated.

The A liquid storage tank 22 stores the A liquid transferred from the A liquid preparation tank 21. The storage of the A liquid is controlled by an electrode (not shown), and when the predetermined amount is reached, the electrode (not shown) is activated to instruct the supply of the A liquid from the A liquid mixing tank 21. This instruction is issued when the amount of the liquid in the A liquid storage tank 22 is reduced to such an extent that all the A liquid in the A liquid mixing tank 21 can be put together. However, liquid A storage tank 2
Since the A liquid is continuously used in No. 2, if this instruction is given when the amount of the liquid in the A liquid storage tank 22 is excessively reduced, the A liquid used for the injection work will bottom out. . Therefore, this instruction is issued after securing a certain amount of the remaining amount of the A liquid in the A liquid storage tank 22. In addition, since the liquid A in the liquid A storage tank 22 is continuously circulated and agitated by the agitating device 4 from the end of the first storage of the liquid A after the operation of the device is started,
The A liquid in the A liquid storage tank 22 is managed in a homogeneous state. Then, from the discharge pipe 28 through the chemical liquid switching device 6, A
Liquid injection work is performed.

In the present embodiment, the liquid tank main body 2 is divided into horizontal rows to form each liquid tank, but the divided shape and the arrangement of each liquid tank are not particularly limited. Can be appropriately determined as necessary.

Further, in the present embodiment, each liquid tank is provided with a stirring device 4, a transfer / circulation stirring device 5 and the like to constitute the blending device 1. However, a conventional propeller stirring device and these are used. The blending apparatus 1 may be configured by using the above blending apparatus together. The arrangement of the transfer device 3, the stirring device 4, the transfer / circulation stirring device 5 and the like is not particularly limited, and may be appropriately added or changed as necessary. For example, when performing a soil stabilization method using pre-B _S solution A solution partially prepared are mixed pH11 or more of the transfer device 3 provided in the B _S solution storage tank 24, the B _S liquid The blending device 1 may be configured so that the B _S liquid in the storage tank 24 can be transferred to the A liquid blending tank 21. Furthermore, in the present example, the A solution, the B _S solution for the instantaneous setting compound and the B _S solution for the slow setting compound.
_Although the three-liquid type blending device 1 including the _L liquid has been described, it goes without saying that the two-component type blending device 1 can also be downsized by configuring it in the same manner.

[0030]

As described above, according to the present invention, the chemical liquid in the liquid tank sucked from the liquid suction portion can be discharged from the liquid discharge portion, and the mixing and stirring can be performed by the liquid circulation in the liquid tank. Therefore, without protruding the stirring device etc. to the outside of the liquid tank,
A compact compounding device can be configured, which makes it convenient to carry and improves workability.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an outline of the overall configuration of a ground injection chemical mixing device.

2A and 2B are a plan view and a side sectional view showing a liquid B mixing tank.

FIG. 3 is a front view and a side view showing a discharge pipe of a stirring device.

[Explanation of symbols]

1 Ground injection preparation device 2 liquid vessel main body 21 A solution preparation tank 22 A water reservoir 23 B _S solution preparation tank 24 B _S solution storage tank 25 B _L solution preparation tank 26 B _L solution storage tank 4 stirrer for chemical (drug solution preparing device ) 41 Submersible pump (liquid absorbing part) 42 Discharge pipe (discharging part) 5 Transfer / circulation stirring device (chemical preparation device) 51 Submersible pump (liquid absorbing part) 55 Discharge pipe (discharging part)

Claims (1)

[Claims] 1. A soil stabilizer for injecting into a soil a water glass-based grout agent obtained by mixing a liquid A containing sodium silicate and a liquid B containing a water-soluble hardening agent for water glass. A device provided with a plurality of liquid tanks for preparing and storing the liquids A and B used in the method, wherein at least the liquid absorbing portion and the liquid discharging portion are provided at the bottom of one or more liquid tanks. The ground is characterized in that a chemical liquid preparation device is arranged, and the chemical liquid in the liquid tank sucked from the liquid suction portion is discharged from the liquid discharge portion, and mixing and stirring is performed by liquid circulation in the liquid tank. A compounding device for injectable chemicals.