JP4830050B1 - Injection material manufacturing apparatus, injection material manufacturing method, and injection material injection method - Google Patents

Abstract

[PROBLEMS] To produce a silica injection material having an optimum composition according to the condition of the ground and the surrounding ground environment, and an injection material manufacturing apparatus capable of injecting an injection material into the ground in parallel with the manufacture of the injection material, and injection A material manufacturing method and an injection material injection method are provided.
SOLUTION: A mixing tank 1 for mixing a plurality of raw material liquids, and a plurality of liquid feed pumps S ₁ , S ₂ , S ₃ , S _{4 ,.} comprising liquid feed pump _{S 1, S 2, S 3} , S 4, a plurality of drive 9 for driving the ... S _n individually. The liquid feeding pumps S ₁ , S ₂ , S ₃ , S ₄ ,... _Sn and the driving device 9 each constitute one unit. A plurality of such units are provided. A control device 15 that controls a plurality of units collectively or individually is provided. Comprising liquid feed pump _{S 1, S 2, S 3} , S 4, ... S n is the cylinder 8a and the piston 8b for sucking and discharging the raw material liquid respectively. By controlling the stroke of the piston 8b, the raw material liquid is fed into the mixing tank 1 at a set blending ratio.
[Selection] Figure 1

Description

  The present invention relates to an injection material manufacturing apparatus, an injection material manufacturing method, and an injection material injection method, and is applied to the manufacture and injection of silica-based injection material obtained by mixing silica sol, silica colloid, and silica sol and silica colloid, or It is applied to the combined use of suspension grout, and the manufacture and injection of injection materials in which fine air (microbubbles) is mixed in water or silica solution. Depending on the situation and the environment of the surrounding ground, manufacture silica injection material with optimal composition, or combine multiple injection materials with the same injection material manufacturing equipment and continuously select and change optimal composition. The injection material can be manufactured, and the injection material can be injected into the ground in real time in parallel with the manufacture of the injection material.

  The ground chemical injection method in civil engineering and construction works is a ground improvement method that injects a chemical solution (solidification material) into the ground to reduce the water permeability of the ground or to strengthen the ground. It is widely implemented in the foundation of existing structures for strengthening the earthquake resistance, preventing liquefaction, and also preventing evacuation of revetments.

  As the injection material, silica sol, silica colloid obtained by neutralizing water glass, or silica-based injection material obtained by mixing silica sol and silica colloid is widely used.

  Also, during construction, by changing the injection volume, injection pressure, injection speed, etc. in real time according to the injection situation and ground situation, the injection material will be transferred, the ground will crack, and the ground will rise. It is controlled not to happen. Furthermore, it is desirable to change the formulation of the injection material according to the ground condition, the relationship with the building, environmental conservation, and groundwater conditions.

  For example, when improving the ground consisting of multiple layers such as sandy and gravel layers with high water permeability and silt layers and clay layers with low water permeability, A short silica injecting material is injected, and a silica injecting material with a long gelation time is injected into a formation with low water permeability.

  In addition, a composition having a high silica concentration and a high strength is used for a formation having a large gap or a clay soil, while a composition having a low silica concentration is used for a formation having a small gap.

  In addition, when the ground around the underground structure such as RC joint grooves is improved, the concrete reinforcement function including a large amount of metal ion sequestering materials such as phosphate compounds is applied to the part close to the underground structure. An acidic silica solution injection material is injected.

  In addition, when a certain level of liquefaction strength is required as in the liquefaction countermeasure method, a layer with a lot of gravel or a layer with many gaps requires a high silica concentration, and a fine sand layer has a low silica concentration. However, sufficient strength can be obtained.

  In addition, when seismic reinforcement is applied to the periphery of existing concrete structures, silica sol grout is applied to areas where the concrete structure is excellent in durability or silica colloid containing a sequestering agent is injected, and where no permanentity is required. Alternatively, an acidic silica sol grout containing a sequestering agent or an acidic silica sol grout containing no sequestering agent may be injected.

  In addition, a ground improvement method having an earthquake resistance by injecting an aqueous solution containing fine particles of air (microbubbles) mixed with water or a silica solution or a silica solution has been proposed.

  For this reason, even if it is ground improvement for one continuous injection target ground, silica injection materials with different compounding recipes are continuously used depending on the location, depth, presence of underground structures and their positional relationship, etc. Manufacturing and injection was required.

JP 2003-221222 A JP 2010-59673 A JP 2007-51481 A

  Conventionally, two types of manufacturing methods are known as a manufacturing method of a silica injection material. One is a batch method that mixes using a mixer consisting of two upper and lower mixing tanks. During the injection operation in the lower mixing tank, the upper mixing tank mixes in batches of 100 to 400L. Since it is a method that repeats injection after mixing 1 batch, it is difficult to perform injection and mixing continuously, and selection and change of the optimal composition in real time according to the injection situation and ground situation It was impossible to do.

  Another method is a merging method in which the main liquid A and the reactive liquid B are combined in a mixing tank. In particular, it is difficult to accurately combine the liquids of the liquid A and liquid B pumps, and the flow rate ratio of liquid A and liquid B may fluctuate due to the pulsation of the pump. Met.

  In particular, during injection, it is possible to change the silica concentration, the concentration of the reactants, the mixing ratio of the A and B liquids, and inject the predetermined mixing concentration and gel time according to the construction conditions and ground conditions. The mixing and mixing must be carried out separately, both of which require time and effort for mixing, and it is not only difficult to perform mixing accurately, but it is also troublesome because it is necessary to prepare several mixing devices. there were.

  Thus, it is difficult to adjust the gelation time of silica grout, and the difficulty of blending the optimum gelation time according to the silica concentration is shown in the relationship between water glass and pH in FIG. Is drastically changed by a slight change in pH, which is due to the great influence on gelation.

  Further, as shown in FIG. 6, the stable region of gel time is only in the region where the pH is almost neutral and in the vicinity where the pH is strongly acidic, and the acidic region in the meantime has a rapid change in gelation time depending on the pH. However, when the pH is in the alkaline region, the gelation time increases rapidly and the gelation becomes unstable. For this reason, it is difficult to solidify a predetermined penetration range by adjusting the gel time.

  The present invention has been made in order to solve the above problems, and the compounding formulation of the injection material, that is, the silica concentration, pH, the ratio of the reactants and additives, the type, the compounding ratio, etc. are accurately and continuously in real time. It is possible to produce an optimally blended injection material according to the injection conditions and ground conditions, as well as the surrounding ground environment, and the injection material manufactured in parallel with the manufacture of the injection material An object of the present invention is to provide an injection material manufacturing apparatus, an injection material manufacturing method, and an injection material injection method that can be injected therein.

  Further, according to the present invention, an aqueous solution (microbubble liquid) mixed with fine air (microbubbles), a silica solution mixed with air, a silica solution mixed with a reactive agent, a silica solution without adding a reactive agent, and a reaction It is also possible to combine at least two kinds of injection materials such as an aqueous solution of an agent, or to manufacture and inject any of the solutions continuously or at different times.

Injecting material manufacturing apparatus comprising: a mixing tank for mixing a plurality of raw material liquid, a plurality of liquid feed pumps individually feeding a plurality of raw material solutions were selected according to the condition of the ground to the mixing vessel And a plurality of driving devices for individually driving the liquid feeding pumps, each of the liquid feeding pump and the driving device constitutes one unit, includes a plurality of the units, and includes the plurality of units. Provided with a control device that controls collectively and / or individually, the liquid feed pump includes a cylinder and a piston for sucking and discharging the raw material liquid, and the strokes of the pistons of the liquid feed pumps are all completed within the same time. as controls the stroke and the speed of the piston of each liquid sending pump, a plurality of selected according to the condition of the ground to the mixing vessel by further controlling the selection and mixing ratio of the raw material liquid To become configured to feeding the formulation ratio set the postal liquid in which the features.

  The present invention is applied to the production of grout with gelation such as water glass grout, silica colloid grout, suspension grout, etc., and particularly silica blend liquid of grout that gels in acidic to neutral region such as silica sol and silica colloid. It is particularly suitable for ground chemical solution injection methods such as ground improvement using, and by setting the discharge rate of each raw material liquid by arbitrarily setting the stroke of the piston of each liquid feed pump, (1) (2) The gelation time can be accurately blended, and (3) Silica injection material that is optimally blended according to the injection condition of the injection material, the ground condition, and the surrounding environment Can be manufactured continuously in real time in parallel with the injection work by the same injection material manufacturing apparatus. (4) Also, during the injection, the raw material liquid discharge amount of each liquid feed pump is changed or interrupted. By injection It can be the production of liquid combination that changes and blending ratio easily and accurately changed with the gel time and optimum strength.

  In addition, each of the liquid feed pump and the drive device constitutes one unit, is configured to include a plurality of such units, and operates independently for each unit, and each unit is integrated as a whole. Can control the production of injection material consisting of many types of raw material liquids, and can efficiently operate only the number of units according to the number of raw material liquids required, as well as maintenance. Can be done every. For this reason, it is a compact injection material manufacturing apparatus having multiple functions, and can be implemented as a mobile injection material manufacturing apparatus such as an on-vehicle plant.

  When the drive device is an electric motor, the stroke of each liquid feed pump that feeds the raw material liquid can be easily set by controlling the electric motor with an inverter. The discharge amount can be easily changed.

  That is, when the length of one stroke of the piston is set long, the volume in the cylinder increases, and the amount of the raw material liquid supplied per one stroke sent from the raw material liquid tank into the mixing tank increases. On the other hand, when the stroke length of the piston is set short, the volume in the cylinder is reduced, and the supply amount of the raw material liquid per stroke supplied from the raw material liquid tank into the mixing tank is reduced.

  Also, by controlling the speed of each piston so that one stroke of each piston of each liquid feeding pump is completed within the same time, one stroke of the raw material liquid fed from each raw material liquid tank into the mixing tank is simultaneously obtained. The liquid can be fed, and one stroke of each liquid feed pump can be accurately blended.

  From this, it is possible to manufacture a silica injection material that is accurately blended for each operating capacity of the liquid pump of each unit, and there is no addition of a blending error, so a silica injection material of the optimal composition that has been set Can be manufactured.

  For example, a stirring device provided with a stirring blade for stirring and mixing a plurality of raw material liquids may be installed in the mixing tank. In addition, when air bubbles are mixed, it may be sealed and pressure resistant.

  Further, a mixing pump can be used for the mixing tank, and an electric actuator or the like can be used for the driving device. The electric actuator can arbitrarily set the stroke of the liquid feeding pump by controlling a built-in rotary coder.

  In addition, a plurality of sets of cylinders and pistons of each liquid pump are provided on the same axis in the horizontal (left and right) direction or vertical (up and down) direction, and the pistons are operated by the same piston rod on the same axis. By controlling the motor, the piston reciprocates alternately so that the raw material liquid can be sucked and discharged alternately at the same time, and the liquid feed pump is operated efficiently to continuously feed the raw material liquid into the mixing tank. The liquid can be sent.

  The injection material manufacturing apparatus according to claim 2 is the injection material manufacturing apparatus according to claim 1, wherein the liquid feed pump, the drive device, and the control device are mounted on a self-propelled or towed cart. Is. The present invention provides an injection material manufacturing apparatus that is excellent in mobility and convenience, particularly by adopting a self-propelled or towed movable type.

  In addition, the tank which puts a raw material liquid can be supplied without power without using a special power pump for the raw material liquid in each tank by installing above a liquid feeding pump.

The injection material manufacturing method according to claim 3, wherein an injection material is manufactured by mixing a plurality of raw material liquids at a set mixing ratio, and a mixing tank for mixing a plurality of raw material liquids, and the mixing tank A plurality of liquid feed pumps for individually feeding a plurality of raw material liquids selected according to the ground conditions, and a plurality of drive devices for individually driving the liquid feed pumps, the liquid feed pump and the drive device Each of which constitutes one unit, includes a plurality of the units, and includes a control device that controls the plurality of units collectively and / or individually. comprising a discharge to the cylinder and the piston to control the stroke and speed of the piston of each liquid sending pump to stroke of the piston of each liquid sending pump is completed in all the same time, further selection of the raw material liquid Mixing by controlling the compounding ratio, respectively the amount of one stroke of a plurality of raw material solutions selected in the set blending ratio in the mixing vessel was fed according to the condition of the ground, and the plurality of raw material solutions It mixes in a tank and manufactures an injection material, It is characterized by the above-mentioned.

The injection material manufacturing method according to claim 4 is the injection material manufacturing method according to claim 3, wherein the information on the selection of the raw material liquid, the blending ratio, the stroke and speed of the piston, and the change of these values is collectively recorded in the control device. It is characterized by controlling .

The injection material manufacturing method according to claim 5 is characterized in that, in the injection material manufacturing method according to claim 3 or 4 , the kind, the addition amount and / or the combination ratio of the composition of the injection material are changed. .
The injection material manufacturing method according to claim 6 is the injection material manufacturing method according to any one of claims 3 to 5, wherein water glass and / or colloidal silica, sulfuric acid and / or as a raw material liquid of the silica injection material. Phosphoric acid and / or additive material, fine particle air, and water are respectively fed.

  The present invention is a method for producing a silica-based injection material. Water glass, colloidal silica, sulfuric acid, phosphoric acid, an additive and water are used as a raw material liquid or suspended depending on the injection condition, ground condition, or surrounding environment. A desired silica sol injecting material can be produced by appropriately selecting and supplying a solution containing turbid liquid or fine particle air.

  Moreover, gel time and intensity | strength can be increased / decreased by increasing / decreasing supply of the water as a raw material of an injection material.

  In addition, the gelation time can be adjusted by using all the reactants as additives, but the gelation time can be adjusted by using sodium bicarbonate, sodium carbonate, caustic soda as an alkali material, or using acid salt, basic salt, etc. It can be advanced or delayed.

It should be noted that at least one of the following matters is changed.
(1) Water glass, colloidal silica or a combination of water glass and colloidal silica, acidic water glass mixed with water glass and acid, acidic colloidal silica mixed with colloidal silica and acid, water glass concentration, colloidal silica concentration, water glass And colloidal silica combination ratio, total silica concentration

(2) Sulfuric acid, phosphoric acid or a combination of sulfuric acid and phosphoric acid, or a combination thereof with a chloride such as aluminum chloride, a sulfate such as aluminum sulfate, or a phosphate,
The sulfuric acid concentration, the phosphoric acid concentration, the combined ratio of sulfuric acid and phosphoric acid, the combined ratio of these and salts, the total concentration of sulfuric acid and phosphoric acid, and of course, any other reaction materials and salts can be used.

(3) Cement, slag, cement and slag mixture and their combined ratio and total concentration
(4) Presence / absence of additives and changes in the amount added
(5) Change of presence / absence of air bubbles in fine particles and the amount of contamination

  For example, for ground with high water permeability such as sandy layer, reduce the amount of acid and acid salt in acid water glass grout or shorten the gelation time by adding alkali material. It can be solidified in a short time to prevent the injection material from escaping and to ensure water-stopping property, and continuously increase the blending amount of sulfuric acid to increase the gelation time and improve the permeability. Can be planned.

  On the other hand, for soils with low water permeability, such as silt layers and clay layers, increase the amount of acid and acid salt to increase the gelation time, so that osmotic injection takes a sufficient amount of time. Thus, cracks in the ground and vein injection can be prevented.

  Further, when the water permeability is too small and pulmonary injection is unavoidable, the silica concentration is increased or a suspension is used in combination. In addition, for the RC foundation supporting ground of existing structures, a concrete protective film is formed on the concrete surface using a silica compounded liquid containing a metal ion sequestering material such as phosphoric acid or phosphoric acid compound in the vicinity of the concrete. By doing so, the RC foundation can be protected.

  And in the area | region far from concrete, the liquid mixture using sulfuric acid is used, and in the intermediate area, the ratio of sulfuric acid and phosphoric acid is changed and used together.

  Decreasing the amount of water added to increase the silica concentration can increase the support capacity of the ground, and increasing the amount of water added can increase the water stopping effect and permeability at a low silica concentration. . Further, by blending a metal ion sequestering material and colloidal silica, it is possible to prevent the neutralization of the concrete and increase the durability of the concrete.

  On the injection region side that affects the aquatic product, non-polluting silica ground by silica colloid can be used.

  Moreover, the liquefaction countermeasure work can be economically performed by producing and injecting an infusion solution corresponding to the injecting purpose and ground conditions such as the presence / absence of addition of particulate air and a change in the amount of addition.

At least one of the following matters can be changed.
(1) Gelation time
(2) Silica concentration
(3) Selection of use / non-use of suspension, use ratio, concentration
(4) Selection, usage ratio and concentration of sulfuric acid, phosphoric acid and additives
(5) pH
(6) Quantity and ratio of compounded water
(7) Formulation corresponding to environmental conditions such as injection area, injection depth, groundwater conditions, soil conditions, underground structures, lakes, rivers, aquatic products, etc.

The injection material injection method according to claim 7 , wherein an injection material is manufactured by mixing a plurality of raw material liquids at a set blending ratio, and the injection material is injected into the ground through an injection pipe. In the mixing tank for mixing a plurality of raw material liquids, a plurality of liquid feeding pumps for individually feeding a plurality of raw material liquids selected according to the condition of the ground in the mixing tank, and the liquid feeding pumps individually A plurality of driving devices for driving, and an injection pipe for injecting the injection material sent out from the mixing tank into the ground, each of the liquid feeding pump and the driving device constitutes one unit, and the unit is comprising multiple units, and a control device for controlling the plurality of units in collective and / or individual, the liquid feed pump includes a cylinder and a piston for sucking and discharging the raw material liquid, straw piston of each liquid sending pump There controlling the stroke and speed of the piston of each liquid sending pump to be completed in all the same time, further by controlling the selection and mixing ratio of the raw material liquid, depending on the situation of the ground into the mixing chamber A single stroke amount of a plurality of selected raw material liquids is fed at a set blending ratio, and the raw material liquids are mixed in a mixing tank to produce an injection material, and the injection material is injected into an injection tube It is characterized by being injected into the ground via

  According to the present invention, an optimally compounded silica injection material can be manufactured in real time according to the injection condition of the injection material, the ground condition, and the surrounding environment, and can be manufactured in parallel with the injection operation. There are effects such as. Moreover, even during the injection of the injection material, the blending ratio can be continuously switched in real time according to the ground conditions and the like.

  Furthermore, since a plurality of raw material liquids are blended at a blending ratio that has been set for each stroke of the piston of each liquid feed pump, there is no accumulation of blending errors, so that it is almost as set. This silica injection material can be accurately and easily produced.

  In addition, by making it possible to mix arbitrarily by using multiple injection materials, the equipment can be made compact and on-board plant. The ground can be improved.

It is a conceptual diagram which shows the outline | summary of one Embodiment of this invention. It is a conceptual diagram which shows the outline | summary of other embodiment of this invention. FIG. 2A is a conceptual diagram of a liquid feed pump that uses a drive device as an electric actuator, FIG. 3B is a conceptual diagram of a liquid feed pump that uses a drive device as an electric motor, and FIG. It is a conceptual diagram of the liquid feeding pump used as a cylinder. It is a conceptual diagram which shows the outline | summary of other embodiment of this invention. A method for injecting a silica sol injection material is shown. (A) is a cross-sectional view showing a method for injecting an injection material into a ground composed of a plurality of layers having a high water permeability and a low water permeability, (b), (c) It is sectional drawing which shows the injection | pouring method of the injection material with respect to the surrounding ground of RC underground structure. It is a graph which shows the general relationship of pH range of silica grout, water glass concentration, gelation time, and intensity.

  FIGS. 1-6 is a conceptual diagram which shows one Embodiment of this invention, In the figure, the code | symbol 1 is mixing which can mix-adjust the raw material liquid of the silica injection material supplied with the set compounding ratio efficiently. The mixing tank 1 is equipped with a stirring device equipped with a stirring blade 1 a and the like for stirring and mixing a plurality of raw material liquids fed into the mixing tank 1.

  Reference numerals 2, 3, 4, 5,..., N are raw material liquid tanks that contain the raw material liquid of the silica injecting material to be fed into the mixing tank 1, and silica such as water glass, silica colloid, sulfuric acid, phosphoric acid, additives, and water. The raw material liquid of the injection material is put separately.

Code _{S 1, S 2, S 3} , S 4, ... S n is the raw material tank 2, 3, 4, 5, a plurality of raw material liquid Ru fed through respective supply pipe 6 ... n, mixing tank a liquid feed pump for feeding the formulation ratio set respectively by liquid feed pipe 7 to 1.

Each feed pump _{S 1, S 2, S 3} , S 4, ... S n comprises each cylinder 8a and the piston 8b of the suction and discharge the raw material liquid, the electric motor 9 to further actuate the piston 8b (drive) ing.

Each liquid feed pump _{S 1, S 2, S 3} , S 4, ... piston 8b of the cylinder 8a of S _n is the piston rod 10 is connected across the output shaft of the electric motor 9 (drive shaft) It installed one set symmetrically same axis, is adapted to advance and retreat alternately operated by the piston 8b is linked.

The drive shaft and the piston rod 10 of the electric motor 9 are connected via a power transmission unit 11. The driving force (rotational force) of the electric motor 9 is a force that causes the pistons 8b and 8b to reciprocate in the cylinder 8a to the piston rod 10 connected to both ends of the driving shaft via the power transmission unit 11. is transmitted to the rod 10, the piston 8b, 8b is adapted to reciprocate alternately in the cylinder 8a, 8a.

Also with this, the raw material tank 2, 3, 4, 5, ... each liquid sending pump _S 1 from _{n, S 2, S 3,} S 4, ... raw material fluid supply pipe in each cylinder 8a of S _n 6 is continuously sucked in through 6, discharged from the inside of the cylinder 8 a, and continuously fed into the mixing tank 1 through the liquid feeding pipe 7.

Each liquid feed pump _{S 1, S 2, S 3} , S 4, ... electric motor 9 S _n is controlled by the inverter 12, by controlling the electric motor 9 by inverter 12, each piston 8b, 8b of stroke is controlled, which the liquid feed pump S _{1 by, S 2, S 3, S} 4, ... discharge amount of one stroke of each raw material liquid to be respectively fed to the mixing tank 1 from S _n is arbitrarily set And can be changed arbitrarily.

Furthermore, each of the liquid feed pumps S ₁ , S ₂ , S ₃ , S ₄ ,... _Sn and the electric motor 9 constitutes one unit and is configured to operate independently for each unit. Yes.

FIG. 3 (a) shows a mode in which an electric actuator is used as a driving device. A movable part that reciprocates by a ball screw having a predetermined length rotated by a servo motor is attached to each electric actuator 14, and the movable part and each feed pump _{S 1, S 2, S 3} , S 4, ... a piston rod 10 of the S _n are connected via a bracket 14a.

Then, the piston rod 10 reciprocates by the electric actuator 14 is driven, the piston 8b is by me a position opposite thereto, 8b is adapted to reciprocate the cylinder 8a, the inside 8a alternately.

The electric actuator 14 includes a rotary encoder. Then, the control unit controls receiving a pulse signal by the rotation encoder by a predetermined program in 13, the liquid feed pump _{S 1, S 2, S 3} , S 4, to be able to set the stroke of _... S _n of the piston 8b has become, which is thus capable one stroke, i.e. arbitrarily set the discharge amount of the material liquid for each liquid sending pump _{S 1, S 2, S 3} , S 4, ... S n of the piston 8b.

  Reference numerals 15 and 16 denote switching valves. The switching valve 15 is attached to each supply pipe 6, and the switching valve 16 is attached to each liquid feeding pipe 7.

Then, each raw material tank 2, 3, 4, 5 by the switching valve 15, ... each liquid sending pump _S 1 from _{n, S 2, S 3,} S 4, ... and stop the supply of the raw material liquid fed to S _n There are controlled, the liquid feed pump S ₁ by the switching valve _{16, S 2, S 3,} S 4, ... liquid delivery and stop the raw material liquid from S _n into the mixing tank 1 is adapted to be controlled.

That is, the switching valve 15 and 16, the raw material liquid feeding pump _{S 1, S 2, S 3} , S 4, ... in phase with S _n, the raw material liquid feeding pump _{S 1, S 2, S 3} , S 4, ... while one piston 8b of S _n (e.g. drawing left) is retracted within the corresponding cylinders 8a, the switching valve 15 in the feed pipe 6 connected to the cylinder 8a is closed, the switching valve 16 in the liquid feed pipe 7 Opens. When the other piston 8b connected to the piston rod 10 (for example, the right side in the figure) advances in the cylinder 8a, the switching valve 16 in the liquid feeding pipe 7 connected to the cylinder 8a is closed, and the switching in the supply pipe 6 is performed. The valve 15 is opened.

Such liquid feed pump _{S 1, S 2, S 3} , S 4, ... each piston 8b and the switching valve 15, 16 of S _n are collectively controlled by the controller 13 to operate all tuned to. Accordingly, the pistons 8b and 8b in the cylinders 8a and 8a arranged on one axis operate forward and backward alternately, so that liquid feeding to the mixing tank 1 is continuously performed.

Further, the thus constructed mixing tank 1, the raw material solution tank 2, 3, 4, 5, ... n, the liquid feed pump _{S 1, S 2, S 3} , S 4, ... S n and the electric motor 9, It can be freely moved and used by being incorporated in a framed support frame (not shown) and mounted on a self-propelled or towed cart (not shown).

With the above configuration, the raw material liquids in the raw material liquid tanks 2, 3, 4, 5,... N are supplied in a mixing ratio set in the mixing tank 1. Further, by changing the mixing ratio in the middle, the liquid feed pump _{S 1, S 2, S 3} , S 4, ... S stroke length and speed of _n of the piston 8b is changed, the raw material tank 2 in mixing ratio after the change, The raw material liquid is supplied to the mixing tank 1 from 3, 4, 5,.

  In this way, the plurality of raw material liquids fed to the mixing tank 1 are stirred and mixed by the stirring device in the mixing tank 1 to produce an injection material having a blending ratio set. And it sends out to the injection | pouring pipe | tube 18 through the liquid feeding pipe | tube 17, and is inject | poured in the ground from the injection | pouring pipe | tube 18. FIG.

  According to the above method, an optimally blended silica injecting material can be manufactured in real time and injected into the ground according to the injecting condition of the injecting material, the ground condition, and the surrounding environment. Moreover, a mixing | blending ratio can be arbitrarily changed according to the condition of a ground, etc. in parallel with injection | pouring of the injection material to a ground.

Note that FIG. 2 and FIG. 3 (c), in particular the raw material liquid feeding pump _{S 1, S 2, S 3} , S 4, an example of the air cylinder 9A is utilized as a driving device for driving a ... S _n It is shown.

In this case, each cylinder 8a and piston 8b of each liquid feed pump S ₁ , S ₂ , S ₃ , S ₄ ,... S _n are installed symmetrically at both ends in the horizontal direction of the air cylinder 9A. The pistons 8b, 8b at both ends are attached to both ends of the same piston rod 10 on the same axis so as to operate in conjunction with each other.

  Further, the cylinder rod 8b of each liquid feeding pump is shared with the cylinder rod of the air cylinder 9A, and the driving force of the air cylinder 9A is directly transmitted as the driving force for reciprocating the piston 8b of the liquid feeding pump. Yes.

Further, operation of the electric motor 9 and actuating the liquid supply pump _S 1 of the drive unit such as an air cylinder _{9A, S 2, S 3,} S 4, ... switching valve 15, 16 at the time of suction and discharge of the raw material liquid by S _n Can be performed in conjunction with a command from the control device 13.

Incidentally, the liquid feed pump _S 1 of each unit _{units, S 2, S 3, S} 4, ... in the S _n, the raw material liquid each raw material tank 2 is supplied via the switching valve 15 from ...... n liquid feed pump _{S 1, S 2, S 3} , S 4, ... when there are many kinds of raw material solution than the number of S _n, as shown in FIG. 4, for example, the liquid feed pump _S 1, _{S 2 , S 3, S 4, ...} , S n or raw material liquid tank further required number part of the liquid feed pump _{S n n + 1, n +} 2 ..., feeding the n + n tube 6 and the switching valve _{15 1,,} 15 ₂ ...

The selection, each raw material tank n + 1, n + 2 ... , the liquid feed pump from _{n + n S 1, S 2} , S 3, S 4, ... switching valve ₁₅ 1 raw material liquid to _Sn, 15 2 ..., by 15n Can be supplied automatically.

For example, when supplying the raw material liquid in the raw material liquid in the tank n + 3 the liquid feed pump Sn opens the only switching valve 15 ₃ to the liquid feed pump Sn side, tighten all other switching valves. Further, when the raw material liquid in the raw material liquid tank n + 1 is supplied to the liquid feeding pump Sn, only the switching valve 15n is opened to the liquid feeding pump Sn side, and all the other switching valves are closed.

More specifically, in order to feed the raw material liquid in the raw material liquid tank n + 3 into the mixing tank 1, the right switching valve 15n is closed, the right switching valve 16 is opened, and the piston rod 8b is opened on the right side. And the raw material liquid in the right cylinder 8a is fed into the mixing tank 1, while the left switching valve 16 is closed, and the switching valve 15 ₃ , 15 ₂ , 15 ₁ is passed through the circuit of the left cylinder 8a. The raw material liquid is fed into the left cylinder 8a.

Then, the switching valve 15 ₁ is closed, opens the left of the switching valve 16 opens the switching valve 15n, closed right side of the switching valve 16, the piston rod 8b is moved to the left, mixing the raw material liquid in the left cylinder 8a The liquid is fed into the tank 1, and at the same time, the raw material liquid in the raw material liquid tank n + 3 is filled into the right cylinder 8a through the switching valve 15n.

By doing so, the liquid feed pump _{S 1, S 2, S 3} , S 4, ... to produce a grout by combining raw material liquid of the installation number or more various S _n in the mixing tank 1 is injected be able to.

Controller 13 selects a combination or change of raw material liquid feeding pump _S 1 unit _{unit, S 2, S 3, S} 4, controls ... individually the operation of S _n of the drive and the switching valve 15, 16 not only operated to actuate while tuning them, feeding pump S ₁ of each _{unit, S 2, S 3, S} 4, ... be different stroke S _n of the piston 8b all units within a predetermined time In this way, the whole can be managed collectively.

  The control device 13 performs collective management by performing an information reception instruction, data accumulation and display using the electric signal circuit 19.

  Next, a method for manufacturing a silica sol injection material and an injection method thereof will be described with reference to FIG.

  (1) First, raw material liquids for producing silica sol injection materials such as water glass, sulfuric acid, phosphoric acid, additives, water and the like are introduced into the raw material liquid tanks 2, 3, 4, 5,.

  (2) Next, the mixing ratio of the silica sol injection material to be manufactured is set in the control device 13. For example, when improving the ground consisting of a sandy layer with high water permeability as shown in Fig. 5 (a) and a plurality of layers such as clay layers and silt layers with low water permeability, In order to reduce the gelation time by increasing the amount of sulfuric acid so as to solidify in a short time and maintain water-stopping time, take sufficient time for silt layers and clay layers. The gelation time is lengthened by reducing the amount of sulfuric acid so that osmotic injection can be performed.

  In addition, a plurality of injection pipes 18 for injecting the silica sol injecting material into the sandy layer i and the silt layer b are inserted into the sandy layer i and the silt layer b at predetermined intervals, respectively, and the silica sol injecting material of the optimum composition is added to each layer. The silica sol injection material is injected in parallel with the manufacture.

  In addition, when improving the ground around the RC foundation c of the existing structure as shown in FIGS. 5 (b) and 5 (c) and the ground around the RC underground structure D such as the underground common trench, these structures are used. For ground hoes close to the object, increase the amount of water glass especially to increase the durability of the ground, and gradually reduce the amount of water glass as you move away from the structure to achieve economic efficiency. Can do.

  In particular, neutralization of concrete can be prevented by using colloidal silica in combination or by adding phosphoric acid, a phosphoric acid compound, or a metal ion sequestering material. Furthermore, the setting of these compounding prescriptions may be performed in parallel with the injection of the injection material.

(3) Next, the raw material liquid feeding pump _{S 1, S 2, S 3} , S 4, ... to operate the electric motor 9 of S _n. Then, the switching of each raw material liquid feeding pump _{S 1, S 2, S 3} , S 4 ... S n of the piston 8b reciprocates alternately in a cylinder 8a, respectively, the conduit being connected to each tuned to this Valves 15, 15 and 16, 16 open and close alternately.

Thus, raw material solution tank 2, 3, 4, 5, ... water glass in n, sulfuric acid, additive, water feed pump through respective supply pipe 6 on the basis of the mixing ratio that is formulations S ₁ , S ₂ , S ₃ , S ₄ ... S _n are sucked into the cylinder 8 b and are continuously fed from the cylinder 8 a to the mixing tank 1 through the liquid feeding pipe 7.

In this case, in each of the liquid feed pumps S ₁ , S ₂ , S ₃ , S ₄ ... S _n , one of the pistons 8b moves forward in the cylinder 8a to discharge the raw material liquid sucked into the cylinder 8a. The liquid is fed to the mixing tank 1 and simultaneously the other piston 8b moves backward in the cylinder 8a to suck the raw material liquid into the cylinder 8a, thereby continuously feeding the raw material liquid from each raw material liquid tank to the mixing tank 1. Can be liquid. Moreover, at that time, each raw material liquid can be sent to the mixing tank 1 by the mixing | blending ratio after a change by changing the mixing prescription of water glass, a sulfuric acid, an additive, and water.

  (4) The water glass, sulfuric acid, additive, and water fed to the mixing tank 1 are stirred and mixed in the mixing tank 1 to produce a desired silica sol injection material. The silica sol injection material produced in the mixing tank 1 is sent to the injection pipe 18 via the liquid supply pipe 17 and is press-fitted into the ground via the injection pipe 18.

  The present invention can produce an optimally blended silica sol injection material according to the injection condition of the injection material, the ground condition, and the surrounding environment, and can be injected into the ground in real time in parallel with the manufacture.

_{S 1, S 2, S 3} , S 4, ... S n feeding pump 1 mixing tank 1a stirring blades 2, 3, 4, 5, ... n raw liquid tank 6 supply pipe 7 liquid feed pipe 8a cylinder 8b piston 9 Electric Motor (drive device)
9A Air cylinder 10 Piston rod 11 Power transmission unit 12 Inverter 13 Control device 14 Electric actuator 15 Switching valve 16 Switching valve 17 Liquid feeding pipe 18 Injection pipe 19 Electrical signal circuit

Claims (7)

A mixing tank for mixing a plurality of raw material liquid, a plurality of liquid feed pumps individually feeding a plurality of raw material solutions were selected according to the condition of the ground to the mixing vessel, for driving the liquid supply pump individually A plurality of driving devices, each of the liquid feed pump and the driving device constitute one unit, each unit is provided with a plurality of units, and the plurality of units are controlled collectively and / or individually. equipped with a device, the liquid feed pump is provided with each cylinder and piston for sucking and discharging the raw material liquid, and the stroke of the pistons of each liquid sending pump to stroke of the piston of each liquid sending pump is completed in all the same time to control the speed, feeding further compounding ratio set a plurality of raw material solutions were selected according to the situation of the ground into the mixing chamber by controlling the selection and mixing ratio of the raw material fluid liquid Injecting material manufacturing apparatus characterized by comprising been configured so that.   2. The injection material manufacturing apparatus according to claim 1, wherein the liquid feeding pump, the driving device, and the control device are mounted on a self-propelled or towed cart. In an infusate manufacturing method for manufacturing an infusate by mixing a plurality of raw material liquids at a set blending ratio, a mixing tank for mixing a plurality of raw material liquids, and a plurality selected in accordance with the ground conditions in the mixing tank A plurality of liquid feeding pumps for individually feeding the raw material liquids and a plurality of driving devices for individually driving the liquid feeding pumps, each of the liquid feeding pumps and the driving devices constituting one unit. A plurality of the units, and a control device that controls the plurality of units collectively and / or individually, and the liquid feed pump includes a cylinder and a piston for sucking and discharging the raw material liquid, and each liquid feed by the stroke of the pump piston to control the piston stroke and speed of each liquid sending pump to be completed in all the same time, to further control the selection and mixing ratio of the raw material liquid, Respectively feeding the amount of one stroke of a plurality of raw material solutions were selected according to the board of the situation at the set blending ratio in the mixing tank, and injected material by mixing the plurality of starting material liquid in the mixing tank A method for producing an injection material, comprising: 4. The injection material manufacturing method according to claim 3, wherein information on selection of raw material liquid, blending ratio, piston stroke and speed, and changes in these values are collectively controlled by a control device. . 5. The method for producing an injection material according to claim 3 or 4, wherein the type, addition amount and / or combination ratio of the composition of the injection material is changed .   The method for producing an injection material according to any one of claims 3 to 5, wherein water glass and / or colloidal silica, sulfuric acid and / or phosphoric acid, and / or an additive, fine particle air are used as a raw material liquid for the silica injection material. And a method for producing an injection material, characterized in that water is fed separately. A mixing tank for mixing a plurality of raw material liquids in an injection material injection method in which a plurality of raw material liquids are mixed at a set mixing ratio to produce an injection material and the injection material is injected into the ground through an injection pipe A plurality of liquid feed pumps for individually feeding a plurality of raw material liquids selected according to the ground conditions in the mixing tank, a plurality of driving devices for individually driving the liquid feeding pumps, and the mixing tank The injection pump for injecting the injection material sent out from the ground into the ground, the liquid feed pump and the drive device each constitute one unit, the unit is provided with a plurality of units, and the plurality of units are collectively and / or individually provided with a control unit for controlling such that the liquid feed pump includes a cylinder and a piston for sucking and discharging the raw material liquid, the stroke of the pistons of each liquid sending pump is completed in all the same time Controls the stroke and the speed of the piston of each liquid sending pump, further by controlling the selection and mixing ratio of the raw material liquid, one stroke of a plurality of raw material solutions were selected according to the situation of the ground into the mixing chamber In addition to feeding the liquids in a set mixing ratio, the plurality of raw material liquids are mixed in a mixing tank to produce an injection material, and the injection material is injected into the ground through an injection pipe. A method for injecting an injection material.

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