JP2000220131A - Multiple grout injection equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To allow a plurality of injection systems to select a time point of feeding into a water glass aqueous solution and a time point of switching to water, and record the operation time of various valves at the time point of the switching. I do. A water introduction pipe is provided in the middle of a main pipe connecting one side to an A infusion pump and the other side to a B infusion pump.
Are connected, and open / close valves 43A, 43A,
43B are respectively provided, and the one and the open / close valve 43 are provided.
A, the water glass aqueous solution introduction pipe 44 is provided between the main glass pipe 41 and the water glass aqueous solution introduction pipe 44.
4V is provided, and an introduction line 45 for the first hardening material solution G2s and an introduction line 46 for the second hardening material solution G21 are provided between the other end and the opening / closing valve 43B;
The first hardening material is provided at a position before the first hardening material solution introducing pipe communicates with the main pipe 41 and at a position before the second hardening material solution introducing pipe communicates with the main pipe 41, respectively. An introduction valve 45V and a second hardening material solution introduction valve 46V are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for injecting a plurality of types of grout including glass-based grout.

[0002]

2. Description of the Related Art Water glass grout materials are widely used for ground improvement. Also, a so-called “composite grout injection method” or “multi-phase grout injection method” in which a slow-setting grout and an instantaneous setting grout are used in combination is also widely used.

In this type of grout injection method, an aqueous solution of water glass is supplied to an A injection pump, and a first hardening material solution and a second hardening material solution which give mutually different gel times as a reactant to water glass are selectively added to B solution. This is a method in which water glass grout is injected into the ground by being fed into the injection pumps through separate systems, and joined before or in the injection pipe inserted and installed in the ground.

Conventionally, when selectively feeding a first curing material solution and a second curing material solution to a B injection pump by the suction force thereof, a three-way valve is provided in front of the B injection pump, and the first curing material solution is provided. The feeding of the solution and the feeding of the second curing material solution have been selected.

On the other hand, in the grout injection method, it is practically impossible to confirm the injection effect at all injection positions after the injection. Therefore, it is necessary to manage beforehand whether the grout material to be injected has a predetermined density, whether dilution with water is appropriate, and the like.

However, conventionally, the amount of diluted water glass and the amount of hardener supplied to the injection tube have been controlled, but the amount of the undiluted water glass used has not been sufficiently controlled. Therefore, it is conceivable to inadvertently or intentionally excessively dilute the water glass with water to perform injection in a low-density state, which leads to insufficient injection effect and insufficient strength of the improved body. Sometimes. The same applies to the curing agent.

Therefore, the present applicant has previously disclosed in Japanese Patent Laid-Open No.
In No. 2664, the density of the raw water glass solution, the density of the aqueous water glass solution, and the density of the hardener are grasped while being combined with other management elements, and by appropriately controlling the injection material, the desired improved product is always obtained. Creating and further preventing fraudulent intervention, the challenge was to `` merge a water glass aqueous solution diluted with water with a water glass aqueous solution and a curing agent before or inside the injection pipe inserted and installed in the ground, In the injection method of water glass grout to be injected into the ground,
The water glass stock solution is received in the water glass stock solution tank installed at the injection site, the density of the water glass stock solution is measured at the site, and the water glass stock solution whose density is measured is supplied to the water glass dilution tank installed at the injection site, The water glass stock solution used amount in the water glass stock solution tank accompanying this supply is grasped, the water glass stock solution is diluted with water in the water glass dilution tank, and the water glass solution diluted with this water is fed to the junction by an injection pump. Detecting the density of the aqueous solution of water glass in the supply path until leading, and also detecting the density of the curing agent in a supply path separate from the supply path of the aqueous solution of water glass until the curing agent is guided to the junction by the injection pump, At a position before reaching the junction, the flow rate and pressure of the aqueous solution of water glass and the curing agent are detected, and Using the density of the liquid, the used amount of the water glass stock solution in the water glass stock solution tank, the density of the water glass solution, the density of the hardener, the flow rate and pressure of the water glass solution, and the flow rate and pressure of the hardener to manage the injection state,
Water glass grout pouring method "(hereinafter referred to as" preceding method ").

[0008]

However, in a wide or large-scale injection, simultaneous injection is performed through each injection pipe by a plurality of boring machines installed at a plurality of locations. For each injection system,
Rather than installing a grout preparation facility that dilutes the water glass stock solution with water to obtain a water glass aqueous solution and turn the hardener into a solution, only one grout preparation facility is provided and commonly used for multiple injection pipes. This is advantageous in terms of equipment costs.

In this case, according to the prior art method, a supply route until the aqueous solution of water glass diluted with water is led to the junction by the injection pump, and more specifically, as shown in the embodiment, In order to detect the density of the aqueous solution of water glass on the inlet side, an expensive water glass density meter is required for each injection system, which increases equipment costs.

[0010] Therefore, as a sufficient density management mode, while addressing this problem and reducing the equipment cost,
"For a plurality of injection pipes, prepare a grout preparation equipment that dilutes the water glass stock solution with water to obtain a water glass aqueous solution, and turns the hardening material into a solution. Each of the material solutions is configured to be pressure-fed to the injection pipe by an injection pump provided as a set with respect to each injection pipe, and a density of the water glass aqueous solution is detected at an outlet side of the grout preparation equipment. One water glass density meter is provided, the water glass aqueous solution is supplied to each injection pump after passing through the water glass density meter, and the injection is performed to control the density of the water glass aqueous solution based on the density signal from the water glass density meter. Method (hereinafter referred to as "improved method").

However, in the prior construction method, the density of the aqueous solution of water glass passed through each injection pump is measured by a water glass aqueous solution density meter for each injection system, so that water is injected into the injection system for washing or the like. Even when the water glass is fed, it can be determined from the density change between the case where the water glass aqueous solution is fed later and the case where the water is fed.

However, in the improved construction method, for example, 4
Since the injection is performed while passing through one water glass densitometer to one injection system, it is not known at each injection system at what point in time the aqueous water glass solution was fed and switched to water.

[0013] Therefore, a first object of the present invention is that when the above-mentioned improved construction method is adopted, it is possible to select a time point of feeding into the aqueous solution of water and a time point of switching to water in each of the injection systems, and a time point of the switching. An object of the present invention is to record whether or not improper injection has been performed by recording operation signals of various valves.

A second object of the present invention is to make it possible to automate not only the selective switching between the loosening grout and the instantaneous setting grout but also the washing with water.

[0015]

According to the first aspect of the present invention, there is provided a first hardening method for supplying an aqueous solution of water glass to an A injection pump, which causes a mutually different gel time as a reactant for water glass. The material solution and the second hardening material solution are selectively fed to the B injection pump by separate systems, respectively, and merged in front of or in the injection pipe inserted and installed in the ground to inject the water glass grout into the ground. In the equipment, a water introduction pipeline is connected in the middle of a main pipeline connected to the A infusion pump on one side and the B infusion pump on the other side, and open / close valves are provided on both sides of the connection portion. The water glass aqueous solution introduction pipe is provided between the one side and the opening / closing valve, and the water glass aqueous solution is introduced at a position before the water glass aqueous solution introduction pipe communicates with the main pipe. Is provided between the other end and the opening / closing valve, and an introduction line for the first curing agent solution and an introduction line for the second curing agent solution are provided, and the first curing agent solution introduction line is provided. A first hardening material introducing valve and a second hardening material solution introducing valve are respectively provided at a position before communicating with the main pipeline and at a position before the second hardening material solution introducing pipeline communicates with the main pipeline. It is a grouting apparatus for a plurality of types of grout.

According to a second aspect of the present invention, a cement milk introducing pipe is further provided between the first hardening material solution introducing pipe and the second hardening material solution introducing pipe, and the other. The grout injection device according to claim 1, wherein a cement milk introduction valve is provided at a position before the cement milk introduction pipe communicates with the main pipe.

According to a third aspect of the present invention, there is provided the grout injection apparatus according to the first aspect, wherein the on-off valve and each valve are automatic valves.

According to a fourth aspect of the present invention, the first hardening material solution and the second hardening material solution which give mutually different gel times as a reactant to the water glass are selectively injected into the water glass injection pump into the A injection pump. The pumps are sent to the pumps in separate systems, and are joined before or in the injection pipe inserted into the ground and installed in the ground.The equipment for injecting the water glass grout into the ground is used to dilute the water glass stock solution with water. A grout preparation facility for obtaining a water glass aqueous solution and turning the hardening material into a solution is provided, and the water glass solution from the grout preparation facility is supplied to the A injection pump by the first and second
A pair of injection pumps for selectively supplying the curing agent solution to the B injection pump are provided as a set with respect to each injection pipe, and the distribution injection system is configured to be pumped to the injection pipe by the injection pump pair. Are provided corresponding to the number of injection tubes, one water glass density meter is provided on the outlet side of the grout preparation equipment to detect the density of the water glass aqueous solution,
Means are provided for supplying the aqueous solution of water glass from the grout preparation equipment to each of the A injection pumps after passing through the water glass density meter, and controlling the density of the aqueous solution of water glass based on a density signal from the water glass density meter. Further comprising means for performing the following: on the outlet side of the water glass densitometer, one side is connected to the A infusion pump, and the other is in the middle of a main line connected to the B infusion pump, and a water introduction line is connected; Opening / closing valves are provided on both sides of the connection portion, respectively, and the water glass aqueous solution introducing pipe is provided between the one and the open / close valves, and the water glass aqueous solution introducing pipe communicates with the main pipe. A water glass aqueous solution introduction valve is provided at a front position, and an introduction conduit for the first curing agent solution and an introduction conduit for the second curing agent solution are provided between the other and the opening / closing valve; The first hardening material introducing valve is provided at a position before the first hardening material solution introducing conduit communicates with the main conduit and at a position before the second hardening material solution introducing conduit communicates with the main conduit. And a second hardening material solution introducing valve is provided, wherein the open / close valve and each valve are automatic valves, based on an open signal of the one-way open / close valve and an open signal of the water glass aqueous solution introducing valve. A plurality of types of grout injection apparatus, wherein output signals of the water glass densitometer are recorded separately.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings.

<Overall Configuration> The overall configuration of the present invention will be described in more detail below with reference to the accompanying drawings.

As shown mainly in FIGS. 1 to 3, a water glass stock solution GO is carried in by a tank lorry 1 from a water glass manufacturer. This undiluted water glass solution GO is stored in a undiluted water glass tank 2 as a storage container.
It is thrown into. The supplied water glass stock solution GO is supplied to the water glass dilution tank 5 by the liquid sending pump 4 via the water glass stock solution material management device 3 including a flow meter and a density meter.

The water glass stock solution tank 2 is provided with a level meter 2A of an ultrasonic system or the like in view of the liquid level, and a liquid amount signal relating to the amount received from the tank truck 1 is sent to the grout injection management device 50 by the grout injection management device 50. The liquid volume management is performed by being taken into the material record management device 59.

The density of the water glass stock solution GO sent from the water glass stock solution tank 2 to the water glass dilution tank 5 by the solution sending pump 4 is detected by the density detection unit of the water glass stock solution management device 3. Water glass dilution tank 5 on
Liquid. The density signal of the raw water glass solution is taken into the material record management device 59. Here, after judging whether or not the water glass stock solution has a predetermined density, the flow rate is controlled by the flow rate detection unit of the water glass stock solution material management device 3 by the liquid sending pump 4, and the predetermined amount is set in the water glass dilution tank. 5 can also be sent.

On the other hand, water W from the water storage tank 6 is supplied to the water glass dilution tank 5 by the water supply pump 7A,
B, respectively, is supplied to the hardening material preparation tank 8, and is diluted with water W in the water glass dilution tank 5,
The hardener 9 from the hardener storage in the hardener preparation tank 8
Is made into an aqueous solution.

The water glass dilution tank 5 and the hardening material preparation tank 8 each have an auxiliary device such as a mixer, and constitute one grout preparation facility of the present invention.

A plurality of, in this embodiment, four injection pipes 30, 30,... Are prepared for this one grout preparation equipment, and the injection pipes 30, 30 are provided by a grout pumping system provided as a set for these. The water glass aqueous solution G1 and the hardening material solution G2 are sent to 30. Injection tube 30,
Are positioned at a predetermined depth and their positions are changed by the corresponding boring machine.

In the present invention, the water glass dilution tank 5
A water glass density meter 10 for detecting the density of the aqueous water glass solution is provided on the outlet side of the water glass aqueous solution G1.
After passing through the water glass densitometer 10, it branches and passes through the valve units 40A to 40D and the corresponding injection pipe 30.
Are suctioned and pumped by dual infusion pumps 20A to 20D each having A and B paths, and flow / pressure measuring devices 21A to 21D and flow dividing devices 23A to 23D.
To the corresponding injection tube 30 (only the A system is shown in FIG. 2).

On the other hand, the hardening material solution G2 from the hardening material preparation tank 8 branches and passes through the valve units 40A to 40D, and the injection pump 20 paired with the corresponding injection pipe 30.
A to 20D are supplied under suction pressure and supplied to the corresponding injection pipe 30 through the flow rate / pressure / density measuring devices 22A to 22D and the flow dividing devices 23A to 23D.

The hardener solution G2 and the aqueous solution of water glass G1 are fed to the injection pipe 30 and merged before or in the injection pipe 30 and injected into the surrounding ground.

At the actual injection site, the density of the current diluted aqueous glass solution G 1, the density of the hardener, the injection amount,
Control of injection pressure and the like is important for obtaining the desired improved product.

Therefore, in accordance with the prior art method, grout preparation equipments corresponding to the number of injection pipes 30, 30,... Are prepared for each injection system, and the water glass aqueous solution diluted with water is injected into the water glass dilution tank. In order to detect the density of the water glass aqueous solution at the inlet side of the injection pump, respectively, at the supply path leading to the confluence part by the pump, an expensive water glass density meter for the number of injection systems is required, Equipment costs increase significantly.

Therefore, in the present invention, one water glass dilution tank 5 common to all the injection systems is provided in accordance with the improved construction method in order to reduce the equipment cost and to provide a sufficient form for the purpose of density control. On the outlet side, there is provided one water glass density meter 10 that detects the density of the water glass aqueous solution and is common to all injection systems. This water glass density meter 1
By 0, the density of the aqueous solution of water glass G1 is detected, and as long as the density is appropriate, the aqueous solution of water glass G1 should be branched and fed by the target pumping and injection systems in the same density state, It is difficult to perform unauthorized intervention in the system after leaving the water glass density meter 10.

As the water glass densitometer 10, a known one such as a Coriolis type densitometer or an RI type densitometer can be used.

The signal from the water glass densitometer 10 is once taken into a valve unit control unit 55 which controls the valve units 40A to 40D in an integrated manner. The captured density signal is provided to the main processing unit 51 through the general control unit 53, and is provided for recording and creation of a daily work report. The density signal is further positively detected and based on the water glass aqueous solution density signal. It is possible to control the density of the aqueous solution of water glass G1 by adjusting the amount of dilution of water into the water glass dilution tank 5 by, for example, controlling the number of revolutions of the water pump 7A, and adjusting the amount of the undiluted water glass solution G0. More desirable.

The flow rate and pressure of the aqueous water glass solution G1 detected by the flow rate / pressure measuring devices 21A to 21D are as follows.
The injection state individual recording units 54A to 54D capture the grout injection amount and injection pressure chart recorders 58A to 58D.
The information is recorded in 58D and is given to the main processing unit 51 through the general management device 53 to be used for recording and creation of a daily work report.

Flow / pressure / density measuring devices 22A to 22D
The flow rate, pressure and density of the curing agent solution G2 detected by the main processing unit 51
To be provided for the preparation of records and daily work reports.
If necessary, the density of the hardening material solution G2 can be adjusted by adjusting the amount of water dilution to the hardening material tank 8 by, for example, controlling the number of revolutions of a water pump 7A, or adjusting the amount of the hardening material 9 to be charged. The density of the aqueous solution G1 can be controlled.

On the other hand, from the main processing unit 51, the injection state individual recording units 54A to 54D
An injection work command (pattern) signal is given to the valve unit controller 55, and based on the injection work command signal, the injection pumps 20A to 20D are started and stopped, and the valve units 40A to 40 described below are used.
D is operated to switch the flow path.

The series of signals and the operation or control history are taken into the main processing unit 51, and a daily report is prepared by the printer 58 or the like at an appropriate time.

<Specific Configuration of the Present Invention: Valve Unit 4
0A to 40D> By the way, when the grout injection is temporarily interrupted or the one-day work is finished, since the hardening material is used, the grout material adheres to the inside of the injection pipe and / or the injection hose. A water rinsing operation is required to reach the blockage.

In the preceding method, the density of the aqueous solution of water glass passed through each injection pump is measured by a density meter for aqueous solution of water in each injection system. Therefore, water is supplied to the injection system for washing or the like. Even when the water glass aqueous solution is fed later and the water is fed later, it can be determined from the density change. However, in the method of the present invention, for example, four water injection systems are injected while passing through one water glass densitometer. Therefore, at each injection system, at what time the water glass aqueous solution was fed, and switched to water. I do not know.

Therefore, when the method of the present invention is adopted, it is possible to select a time point of feeding into the water glass aqueous solution and a time point of switching to water in each injection system, and record the operation times of various valves based on the time point of switching. Then, it is possible to manage whether or not improper injection has been performed thereafter.

Further, a so-called "composite grout injection method" or a "multi-phase grout injection method" in which a slow-setting grout and a flash-setting grout are used together is also widely used. Conventionally, in this type of grout injection method and also in the preceding method, when the first hardening material solution and the second hardening solution are selectively fed to the hardening material liquid injection pump by the suction force, the hardening material is used. A three-way valve is provided in front of the liquid injection pump to select the feeding of the first hardening material solution and the feeding of the second hardening material solution.

Further, in the prior art, any of the "composite grouting method" or the "multiphase grouting method"
Regardless of the type of grout injection having a constant gel time, the water washing system was selected by manually switching the water hose to the suction side of the water glass liquid supply pump or the hardening material liquid supply pump. In this case, a great deal of labor is required for washing with water.

Therefore, when the above-described method of the present invention is employed, a point in time when water is supplied to the water glass solution and a point in time when water is switched to water can be selected, and the switching point can be recorded as an operation signal of each valve. At the same time, the following valve units 40A to 40D are preferably used in order to automate the selection switching between the slow-setting grout and the instantaneous setting grout, as well as the washing with water.

Attention is now directed to one dual injection pump 20A. The first hardening that causes the A injection pump to receive the aqueous glass solution G1 and the B injection pump to give mutually different gel times as a reactant to water glass. Lumber (for termination)
The solution G2s or the second hardening material (for loosening) solution G21 is selectively fed in separate systems, respectively, and joined before or inside the injection pipe 30 inserted and installed in the ground, and the water glass grout is ground. Inject into.

The valve unit 40A shown in FIG. 4 and FIG. 5 is connected to a water introduction pipe 42 in the middle of a main pipe 41, one of which is connected to the A injection pump and the other is connected to the B injection pump. Opening / closing valves 43A and 43B are respectively provided on both sides of the connection portion, and the introduction pipe 4 for the aqueous water glass solution is provided between the one and the opening / closing valve 43A.
4 and the water glass aqueous solution introduction pipe 44
A water glass aqueous solution introduction valve 44V is provided at a position just before communicating with the main conduit 41,
B, an introduction conduit 45 for the first curing material solution G2s and an introduction conduit 46 for the second curing material solution G21 are provided.
In addition, at a position before the first hardening material solution introducing pipe 45 communicates with the main pipe 41 and at a position before the second hardening material solution introducing pipe 46 communicates with the main pipe 41, A first hardening material introduction valve 45V and a second hardening material solution introduction valve 46V are provided.

Further, between the introduction line 45 of the first hardening material solution G2s and the introduction line 46 of the second hardening material solution G21 and the other, an introduction line 47 of cement milk is provided. The introduction line 47 is connected to the main line 41.
A cement milk introduction valve 47V is provided at a position in front of communicating with the cement milk.

Since each of the above-mentioned introduction valves has the same structure, the operation will be described with reference to FIG. 5 in relation to the first hardening material introducing valve 45V and the second hardening material solution introducing valve 46V and the main pipeline 41. Do.

That is, a valve case 400 is provided in communication with the opening 41a of the main pipeline 41, and the valve case 400
A valve rod 402 of a return piston 401 by air operation is provided so as to be able to reciprocate inside.
03 is integrated.

Therefore, the valve body 40 at the tip of the valve stem 402
3 closes the opening 41a, the hardening material (first
The hardener solution G2s or the second hardener solution G21) does not flow into the main conduit 41. When the valve body 403 at the tip of the valve stem 402 separates from the opening 41a, the hardening material (the first hardening material solution G
2s or the second hardener solution G2l) flows into the main conduit 41. Thereby, the first hardener solution G2s or the second hardener solution G21 can be selectively sent through the B injection pump. When using cement milk as a hardener,
The cement milk introduction valve 47V is opened and the liquid is sent to the B injection pump.

The water glass aqueous solution G1 is used when necessary.
By performing the opening operation of the water glass aqueous solution introduction valve 44V, A
Can be sent to an infusion pump.

If it is desired to wash with water, the system can be washed toward the A infusion pump and / or the B infusion pump by closing each of the introduction valves and simultaneously opening or closing one of the open / close valves 43A and 43B.

Each introduction valve and open / close valve 43A, 43B
By operating the operation based on the electric signal, the timing of opening and closing can be managed and recorded. This is also advantageous in preventing unauthorized intervention.

[0054]

As described above, according to the present invention, the facility cost can be reduced, the density of the water glass can be sufficiently controlled, and illegal intervention at the injection site can be prevented. Therefore, by performing appropriate injection material management, the desired improved body can always be created.

Further, a plurality of injection systems can be used to select a time point at which the water glass solution is fed into the aqueous solution of water and a time point at which the water is switched to water. To manage whether or not it has been performed. Moreover,
Advantages are obtained such as not only automatic selection switching between the loose setting grout and the instantaneous setting grout, but also the washing with water can be automated.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of equipment for implementing the present invention.

FIG. 2 is a schematic diagram of the main part.

FIG. 3 is a system diagram of a liquid.

FIG. 4 is a schematic diagram of a valve unit.

FIG. 5 is a detailed view of a valve unit.

[Description of Signs] GO: water glass stock solution, G1: water glass aqueous solution, G2: hardener solution, 1 ... tank truck, 2 ... water glass stock solution tank, 3 ... water glass stock solution material management device, 4 ... liquid feed pump, 5: Water glass dilution tank, 6: Water tank, 7A, 7B
... water pump, 8 ... hardening material preparation tank, 9 ... hardening material, 1
0: Water glass density meter, 20A to 20D: Injection pump, 2
1A to 21D: flow rate / pressure measuring device, 22A to 22D ...
Flow / pressure / density measuring devices, 23A to 23D: flow dividing device, 30: injection pipe, 40A to 40D: valve unit,
50: grout injection management device, 51: main processing unit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichi Nojiri 2-2-2 Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72) Inventor Sachiko Maekawa 2-2-2 Yoyogi, Shibuya-ku, Tokyo No. Tohoku Japan Railway Company (72) Inventor Fumio Ishikawa 2-2-2 Yoyogi, Shibuya-ku, Tokyo Tohoku Japan Railway Company F-term (reference) 2D040 AB01 CA01 CA02 CB03 CD02 CD03 CD06 CD08 FA00 FA08 FA09

Claims (4)

[Claims] 1. Separate systems of an aqueous water glass solution into an A injection pump and a first hardening material solution and a second hardening material solution which provide mutually different gel times as a reactant for water glass to a B injection pump. And merged in front of or inside the injection pipe inserted and installed in the ground,
In a facility for injecting water glass grout into the ground, one is connected to the A infusion pump, and the other is in the middle of a main pipeline connected to the B infusion pump, a water introduction pipeline is connected,
Opening / closing valves are provided on both sides of the connection portion, respectively, and an introduction pipe for the aqueous water glass solution is provided between the one and the opening / closing valve, and the aqueous water glass introduction pipe communicates with the main pipe. A water glass aqueous solution introduction valve is provided at a position in front, and an introduction conduit for the first curing material solution and an introduction conduit for the second curing material solution are provided between the other and the opening and closing valve,
And a first hardening material solution introducing conduit at a position before communicating with the main conduit and a second curing material solution introducing conduit at a position before communicating with the main conduit,
A grout injection device, comprising a hardening material introduction valve and a second hardening material solution introduction valve. And a second conduit for introducing the first curing agent solution and
A cement milk introduction line is further provided between the introduction line of the hardening material solution and the other, and a cement milk introduction valve is provided at a position before the cement milk introduction line communicates with the main line. The grout injection device according to claim 1, wherein the grout is injected. 3. The grout injection apparatus according to claim 1, wherein said on-off valve and each valve are automatic valves. 4. A separate system, wherein the aqueous solution of water glass is supplied to an A injection pump, and the first and second curing material solutions which provide mutually different gel times as a reactant for water glass are selectively supplied to a B injection pump. And merged in front of or inside the injection pipe inserted and installed in the ground,
In a facility for injecting water glass grout into the ground, there is provided one grout preparation facility for diluting a water glass stock solution with water to obtain a water glass aqueous solution and for converting a hardening material into a solution. A pair of injection pumps for selectively feeding the aqueous solution of water glass to the A injection pump and the first and second hardening material solutions to the B injection pump are provided for each injection pipe, respectively. A plurality of distribution injection systems configured to be pressure-fed to the injection pipe are provided in accordance with the number of injection pipes, and one water glass density meter for detecting the density of the water glass aqueous solution is provided on the outlet side of the grout preparation equipment. Means for supplying an aqueous solution of water glass from the grout preparation equipment to each of the A injection pumps after passing through the water glass densitometer; Means for controlling the density of the aqueous solution of water glass based on the signal; And the water introduction pipeline is connected,
Opening / closing valves are provided on both sides of the connection portion, respectively, and the water glass aqueous solution introduction pipe is provided between the one and the open / close valve, and the water glass aqueous solution introduction pipe communicates with the main pipe. A water glass aqueous solution introduction valve is provided at a position in front, and an introduction conduit for the first curing material solution and an introduction conduit for the second curing material solution are provided between the other and the opening and closing valve,
And a first hardening material solution introducing conduit at a position before communicating with the main conduit and a second curing material solution introducing conduit at a position before communicating with the main conduit,
A hardening material introducing valve and a second hardening material solution introducing valve are provided; the open / close valve and each valve are automatic valves; an open signal of the one-way open / close valve and an open signal of the water glass aqueous solution introduce valve; An apparatus for injecting a plurality of types of grout, wherein an output signal of the water glass densitometer is recorded separately based on the above.