KR100496831B1 - Ground pouring device and ground pouring method - Google Patents

Abstract

The injection liquid pressurizing unit 1 for pressurizing the ground injection liquid 5 and the injection liquid connected to the injection liquid pressurizing unit 1 and pressurized by the pressurizing unit 1 to one or a plurality of injection pipes ( One or a plurality of conduits 6, 6,... 6, respectively, which are fed to 2, 2,... 2, a throttle portion 7 provided in the conduits 6, 6,..., And a downstream conduit ( It is connected to the pressure gauge 8 and / or the flowmeter 9 and the pressure gauge 8 and / or the flowmeter 9 provided in 6), receives information from them, and is connected to the throttle part 7 to the said information. The ground injection apparatus (A) provided with the control apparatus 10 which gives an instruction | command to the throttle part 7 based on it. The throttle instruction is given to the throttle portion 7 when the injection liquid is injected into the ground 3 from the injection pressurization portion 1 via the conduit 6 and the injection pipe passage 2 using this apparatus A. The throttle is adjusted by injecting, and the amount of discharge and / or the discharge pressure of the injecting liquid 5 delivered from the conduit 6 to the inlet conduit 2 are adjusted to the respective inlet conduits 2. It can be adjusted according to the injection situation.

Description

Ground injection device and injection method {GROUND POURING DEVICE AND GROUND POURING METHOD}

The present invention relates to a ground injection device and a method for injecting ground injection liquid into the ground through an injection pipe installed in the ground, and solidifying the ground, and in particular, at a predetermined discharge amount irrespective of the pressure change at the time of injection, The present invention also relates to a ground injection device and a method for arbitrarily adjusting the discharge amount according to the injection situation, and more particularly, to adjust the throttle of the cross section of the conduit for feeding the ground injection liquid to the injection pipe line, and to inject the discharge amount at a predetermined discharge amount. Ground injection device and construction method.

As a ground improvement technique in which injection liquid is injected into the ground and the ground is improved, conventionally, injection pipes are installed in the ground to be injected, and these injection tubes are pulled up one by one from the bottom or pushed downward from the top. A method of injecting while facing the injecting stage is known.

However, most of the target ground to be injected is a weak alluvial layer, which is composed of stacked layers having different permeability. Therefore, the optimum injection pressure is achieved in each soil layer while moving the injection stage, that is, the optimum injection pressure. In order to achieve injection by injection speed, injection amount, injection rate, etc., it is extremely complicated, requires a long time, becomes uneconomical, and practically impossible.

In recent years, liquefaction prevention is required by ground injection.

To prevent such liquefaction requires economic rapid construction of large-capacity soil. However, such rapid construction was not possible with the conventional injection method.

In particular, as described above, the ground is formed by stacking soil layers having different permeability, so that the injection pressure is different between the soil layers, causing a change in pressure, or a change in the injection pressure during injection. Due to the pressure change, ground injection with a certain amount of discharge amount was quite difficult.

In addition, in the case of simultaneously injecting a plurality of injection pipes installed in the ground from one pump, if the injection pressure of the ground of the discharge port to each injection pipe is different, the injection liquid is discharged only to the injection pipe with low pressure, and the predetermined injection amount It was not possible to inject into the injection channel at the same time.

In addition, a method of simultaneously feeding an injection liquid into a plurality of injection pipes through a plurality of orifices or injection ports from a single pump, and injecting into the ground has also been proposed. In this method, the pump pressure fluctuates when the change in the ground resistance pressure of the individual injection pipes is large, or when the ground resistance pressure in each injection pipe changes during the injection process. Therefore, it is difficult to inject into each injection tube at a predetermined discharge rate.

In addition, since after the injection of any of the plurality of injection tubes is finished, it is also difficult to inject the injection from the remaining injection tubes while maintaining a predetermined pressure and discharge amount, and thus practical application has not been achieved. ．

For example, in the case where a plurality of injection pipes have finished injecting some of the injection pipes and closed the valves to the injection pipes, the pressure in the liquid supply pipes rises rapidly and the amount of injection into the remaining injection pipes rapidly increases. It is difficult to continue the injection by maintaining a constant injection amount at a constant injection pressure. It is also difficult to vary the discharge amount from the injection pipe in each injection pipe according to the injection situation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ground injection device and a method for improving the disadvantages existing in the above-described known technology, which can be injected at a predetermined discharge amount regardless of a change in the injection pressure during ground injection.

According to another object of the present invention, even if the penetration resistance pressures of the discharge ports are different from each other, the plurality of injection pipes can be simultaneously injected at a predetermined injection speed from the plurality of injection pipe paths. Even if the injection is stopped, it is possible to easily inject to the last one injection pipe line while maintaining a predetermined pressure and discharge amount without affecting the other injection pipe paths. It is an object of the present invention to provide a ground injection apparatus and a method which improve the shortcomings existing in the above-described known techniques that can be adjusted according to the injection situation.

Another object of the present invention is suitable for the ground improvement of large volume soils, such as ground improvement for rapid construction in liquefaction prevention work or large-scale construction, and in particular, by installing a plurality of injection pipes in the ground to be improved, these It is an object of the present invention to provide a ground injection device and a method for injecting the injection liquid from a plurality of injection pipes simultaneously and selectively and automatically.

According to the apparatus of the present invention for achieving the above object, in the ground injection device for injecting the ground injection liquid into the ground through one or a plurality of injection pipes installed in the ground, and solidifies the ground, the injection liquid An injection liquid pressurizing unit for pressurizing the pressure to a predetermined pressure, a conduit communicating with the injection liquid pressurizing unit and feeding the injection liquid to the injection conduit, and a throttle adjusting device provided in the conduit.

In addition, according to the apparatus of the present invention for achieving the above object, in the ground injection device for injecting ground injection liquid into the ground through one or a plurality of injection pipes installed in the ground, and solidifies the ground, An injection liquid pressurizing portion for pressurizing the injection liquid, a conduit made of a flexible or elastic conduit in communication with the injection liquid pressurization portion, and part or all of the liquid supplied to the injection pipe passage is made of a flexible or elastic conduit; A throttle adjusting device which is installed and presses or decompresses the conduit to adjust the throttle of the cross section of the conduit path, and the throttle adjusting device discharges the amount of the injection liquid fed from the conduit to the injection pipe by adjusting the throttle. And / or adjusting the discharge pressure.

In addition, according to the method of the present invention for achieving the above object, in the ground injection method of injecting the ground injection liquid into the ground through one or a plurality of injection pipes installed in the ground, and solidifies the ground, An injection liquid pressurizing portion for pressurizing the injection liquid, a conduit communicating with the injection liquid pressurization portion and feeding the injection liquid to the injection pipe passage, a throttle adjusting device provided at the conduit, and a pressure gauge provided at a downstream conduit; Alternatively, the injection liquid is injected into the ground from the injection pressurization portion through the conduit and the injection pipe by using a ground injection device provided with a flow meter.

In addition, according to the method of the present invention for achieving the above object, in the ground injection method of injecting the ground injection liquid into the ground through one or a plurality of injection pipes installed in the ground, and solidifies the ground, An injection liquid pressurizing portion for pressurizing the injection liquid, a conduit communicated with the injection liquid pressurization portion, a conduit made of a part or all of the flexible or elastic conduit for transferring the injection liquid to the injection pipe passage, and the flexible or elastic portion of the conduit Injecting the injection liquid into the ground through the conduit and the injection pipe from the injection liquid pressurization unit by using a ground injection device equipped with a throttle adjusting device for adjusting the throttle of the ground injection liquid by pressing or squeezing the conduit Wherein the flexible or flexible conduit is pressed or squeezed by the throttle adjustment device, thereby From the discharge volume and / or the discharge pressure of the injection fluid is injected into the liquid feed pipe characterized in that it adjusts, depending on the situation in the injection pipeline.

EXAMPLES Hereinafter, this invention is demonstrated in detail using an accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow sheet of one embodiment of the apparatus of the present invention. Fig. 2 is a graph showing the relationship between the resistance pressure P and the flow rate f from the orifice with respect to the respective hydraulic pressures at orifice aperture Φ 2 · Omm. It is a graph which shows the relationship between the resistance pressure P in 5 mm and the flow volume f from an orifice about each hydraulic pressure. FIG. 4 is explanatory drawing of the injection liquid press part which concerns on this invention, and another specific example. FIG. This is a flow sheet of a modification of the ground injection device.

6 is a sectional view of one embodiment of a flow control valve used as the throttle portion of the present invention.

Fig. 7 is a cross-sectional view of another example of a flow control valve. Fig. 8 is a cross-sectional view of a specific example of an injection liquid return system used in the present invention. Fig. 9 is a cross-sectional view of another specific example of the throttle portion according to the present invention. Fig. 11 is a partial sectional view showing an operation state of the throttle portion of Fig. 10. Fig. 12 is a partial sectional view of a modification of the throttle portion of Fig. 10. Fig. 13 is a sectional view of the throttle portion of Fig. 10. Fig. 14 is a flow sheet of another specific example of the ground injection apparatus according to the present invention. Fig. 15 is a flow sheet of another embodiment of the ground injection apparatus according to the present invention. Fig. 16 relates to the present invention. Fig. 17 is a flow sheet of another embodiment of the ground injection apparatus. Fig. 17 is a flow sheet of one embodiment of the apparatus of the present invention connected to the central management unit. Portion is an explanatory view showing the apparatus of FIG. 1 in detail with Figure 19 is an operation flowchart of the central control device X1. FIG. 20 is a screen showing a liquid delivery system 10 minutes of the data in Fig.

Fig. 21 is a cross-sectional view of a state in which an injection pipe of one specific example related to the present invention is embedded in the ground. Fig. 22 is a cross-sectional view of a state in which the injection pipe of another specific embodiment according to the present invention is embedded in the ground. A cross section of a state in which an injection pipe of another specific example is embedded in the ground.

As shown in Figure 1, the ground injection device A of the present invention is ground (3) through the ground injection liquid (5) through one or a plurality of injection pipes (2, 2 ... 2) installed in the ground (3) A device for injecting in the air, and solidifying the ground (3), the injection liquid pressurizing portion (1) for pressurizing the ground injection liquid (5) at a predetermined pressure, the injection liquid pressurizing portion (1) is in communication with the injection It basically consists of a conduit 6 for feeding the liquid 5 to the injection conduit 2 and a throttle portion 7 provided in the conduit 6. The throttle portion 7 may be provided at the upper end of the conduit 6, that is, at the branching point of the liquid feeding system 13 and the conduit 6, or at the outlet from the distribution apparatus 11 described later to the conduit 6.

In addition, as shown in FIG. 1, an injection liquid return system RS, that is, a liquid flow meter f _o and / or a liquid pressure gauge, is connected to the liquid feeding system 13 leading to the throttle portion 7 of the ground injection liquid 5. (P _o ) and injection liquid return device (RA) are installed, and the return device (RA) is controlled by the flow pressure control device (10) to maintain a predetermined injection pressure (P _o ), and a part of the injection liquid is returned. through the pipeline (R), thereby returning to the injecting liquid tank 4. That is, infusion fluid return system (RS) is a liquid sending pressure gauge (P _o) and / or flow rate of the signal information from the liquid sending flow meter (f _o) the pressure control device ( l0) is received, the signal passes to the injection fluid return device (RA). infusion return device (RA) is based on information from the liquid sending pressure gauge (P _o) and / or the liquid sending flow meter (f _o), the liquid-delivery A desired pressure is applied to the liquid pressure of the liquid feeding system 13 by dividing the injection liquid in the system 13 from the liquid feeding system 13 to the return pipe line R and returning it to the injection liquid tank 4. Retains and maintains the infusion flow rate to be injected into the liquid feed pipe (2) from the conduit 6 through the throttle portion 7 and thereby a predetermined amount to.

In Fig. 1, the ground injection liquid 5 is injected from the high pressure portion upstream of the throttle portion 7 to the low pressure portion downstream. In this case, the injection pressure P of the pressurized ground injection liquid 5 is applied. _{o If} the differential pressure between the injection pressure P _in of the ground 3 and the injected ground 3 is sufficiently large, even if there is a non-uniformity in the injection pressure of each conduit 6, 6 ... 6 downstream from the throttle portion 7, each conduit The discharge amount (injection speed) of (6) becomes almost the same amount if the area of the throttle portion 7 is the same. The discharge amount is determined by the injection pressure _Po and the area of the hole of the throttle portion 7.

However, in Fig. 1, the ground injection solution 5 is not always injected in exactly the same shape from the entire conduit (6, 6 ... 6) from the beginning to the end of the injection, or quickly depending on the target injection site. There is also a conduit (6) that completes and ends the injection. However, when a portion of the conduits (6, 6 ... 6) completes the injection, this injection amount is distributed to the other conduits (6, 6 ... 6) As a result, the pressure in the conduit 6 becomes high, and the amount of discharge from the remaining conduits 6, 6 ... 6 is increased. In order to prevent this, by adjusting the rotation speed by adjusting the inverter (not shown) of the pump 14, the pressure is dropped to adjust the flow rate or the return system is operated. In this way, the water in the conduit 6 is injected. In spite of the fluctuation of, the pressure of the liquid feeding system 13 can be maintained at a predetermined value, and the injection of the predetermined flow rate can be automatically continued from each conduit 6, 6.

In addition, in FIG. 1, to complete from the injection start, stand because infusion return set the pressure P _o injected by the system (RS) to any value to automatically return to the ground infusion liquid 5, the injection pressure P _o It is also possible to arbitrarily obtain a discharge amount corresponding to the number of conduits 6, 6 ... 6 that are in operation. In addition, by installing an inverter (not shown) in the pump l4, the most appropriate flow range (pressure range) It is also possible to adjust to a predetermined flow rate or pressure within the chamber. Thus, the injection liquid pressurization which pressurizes the ground injection liquid to a predetermined pressure by the injection liquid return system RS or by an inverter and furthermore, in combination thereof. The part 1 is called the injection liquid pressurization part 1 which has a flow pressure control function in this invention. In addition, in Fig. 1, a distribution device 11 may be provided between the liquid feeding system 13 and the conduit 6 to extend the conduits 6, 6 ... 6 from the distribution device 11. 12 denotes a connection portion between the conduit 6 and the injection conduit 2. The conduit 6 also has branch valves V1, V2 ... Vi, Vn, as shown in FIG. Pressure detectors (8) and flowmeters (flow detectors) 9 may be provided arbitrarily.

2 and 3, the Soil infusion (5) (the throttle section 7 (orifices), liquid pressure = P _o of the upstream side of) the pressing of the dispensing device (1l) of Figure 1 the orifice (throttle section 7 ), The orifice diameter is 2.0mm and 2.5mm, and the hydraulic pressure on the upstream side of the orifice is maintained at a predetermined pressure using the return system RS, and the hydraulic pressure on the downstream side of the orifice (ground resistance pressure). Is a graph of the change in flow rate f (1 / min) from the orifice when various changes were made.

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When 2 and higher from Figure 3, the fluid pressure P _o sufficiently larger than the ground resistance the pressure P, the flow rate (f), is determined by the aperture of the fluid pressure (P) and the orifice (0), Further, the fluid pressure (P) even if the fluctuation The flow rate f hardly fluctuates. It has been found that the flow rate f decreases rapidly when the flow rate f decreases within a range where the pressures P _o and P differ. In general, the liquid pressure P _o by a 20~1O0kgf / cm ^2, the difference between the P _o and P are preferable 5kgf / cm ² or more, preferably, 1Okgf / cm ^2.

Figure 4 is a flow sheet of another embodiment of the injection liquid return system (RS) used in the present invention, by using a plurality of pumps 14 in parallel, thereby increasing the injection amount P _o while significantly increasing the amount of liquid supplied. It is possible to simultaneously inject from a plurality of injection pipes. That is, according to the present invention, dozens or more than 100 conduits (6, 6 ... 6) shown in Fig. 1 can be installed in the ground at one time and rapid construction is possible. In addition, infiltration between the soil particles can be made possible by a low discharge amount of 1 to 51 / min per discharge port. That is, when 100 discharge ports are simultaneously injected as one discharge port 31, an injection pump of 300 l / min is required. However, it is difficult to obtain a 3001 / min chemical injection pump. However, by using the apparatus of Fig. 4, it is possible to inject 10 chemical liquid injection pumps of 30 l / min as a set and inject from 100 discharge ports at once. In addition, by using this injection liquid return system RS, 1 Without the need to adjust the discharge amount of the pump, even if the number of discharge ports varies from a plurality of discharge ports, the injection can be automatically continued at a predetermined amount of discharge amount by a constant pressure _Po , and by using the above-mentioned return device This breakthrough injection method can be put to practical use.

Infusion return device (RA) is a flow rate of the pressure control device 10 is obtained a signal of continuous operation, and the liquid sending pressure gauge (P _o) as of the injection, the Soil infusion (5) instructs the return infusion device (RA) The discharge is controlled by returning the classification through the return pipe R, by controlling the pressure (liquid pressure on the upstream side of the throttle portion 7) in the distribution device 11 in FIG. In addition, the pressure in the distribution device l5 is controlled by receiving the signal from the flow meter 9 so as to control the discharge amount of the most suitable conduit 6. In addition, a portion of the conduit 6 ends the predetermined injection to stop the injection. Even if it is, the same discharge amount can be injected from the remaining conduit and the last one can be injected.

Fig. 5 shows an example of the ground injection apparatus according to the present invention using the cylindrical annular dispensing apparatus l1. In general, if the dispensing device pumps the injected liquid directly from the liquid feeding system l3 to each conduit 6, the dispensing device may exhibit excessive pressure and become difficult to operate. In addition, since pulsation occurs, homogeneous penetration into the ground On the other hand, when the liquid is fed from the liquid feeding system 13 to the conduit 6 via the distribution device ll, the pulsation is absorbed and the homogeneous penetration into the ground becomes possible. Infusion liquid return system RS, that is, liquid pressure gauge P _o or liquid flow meter f _o , injection liquid return device RA, return pipe line R, and by providing a flow rate of the pressure control device 10, and the pump 14 rises gradually injection pressure P _o from the start state to the normal operation state, from the conduit (6, 6 ... 6) by setting the injection pressure P _o while grasping the flow rate, and safety it can be made easily injection operation . In addition, since the pulsation of the pump l4 is absorbed in the dispensing apparatus l5, the ground injection liquid 5 without pulsation is fed to each injection pipe passage 2, 2 ... 2, and soil injection is unlikely to occur. Particle penetration is possible. In particular, since the cylindrical annular distribution device 15 as shown in Fig. 5 distributes the pressure in the distribution device 11 evenly, the discharge amount to each conduit 6, 6 ... 6 is homogeneous. Done. Further, liquid feeding pressure gauge (P _o) and the liquid sending flow meter (f _o) may be installed in the dispensing device.

Fig. 6 is a cross-sectional view of the flow control valve B as a specific example of the throttle portion according to the present invention. In Fig. 6, the flow control valve B includes a valve body 15, an inlet passage 16, The outlet passage 17, the balance piston 18, the spring 19, and the inlet port 22 are provided.

The valve body 15 has an inlet 20 for introducing the ground injection liquid 5 in the direction of the arrow and an outlet 21 for discharging in the direction of the arrow, and the inlet passage 16 has a valve body (from the inlet 20). 15) Through the inside, the outlet passage l7 communicates with the inside of the valve body 15 from the outlet 2l.

The balance piston 18 is freely embedded between the inlet passage 16 and the outlet passage 21 according to these passage directions, and also has an inlet (orifice) 22 and an outlet passage 17 communicating with the inlet passage 16. Has an outlet 23 through. In addition, the inlet 22 can freely adjust the tightening and opening by the movement of the balance piston 18 in the passage direction.

The spring 19 is a stretchable elastic body, which is mounted in the outlet passage 17, and adds the balance piston 18 from the direction of the outlet passage 17. As the stretchable elastic body, in addition to the spring 19 shown in FIG. Although not shown, the gel of the injection liquid is filled between the springs, such as a cushioning material made of synthetic resin containing springs, a cushioning material covering a spring with a stretch film such as rubber, and a plastic cushioning material made of synthetic resin such as hard rubber. Various cushioning materials are used.

In the flow control valve B shown in FIG. 6 having the above-described configuration, when the pressure P ₁ (resistance pressure) increases on the outlet 21 side, the outlet 21 side pressure P ₁ and the inlet 20 side pressure P _o Although the injection pressure decreases as the pressure difference P _o -P ₁ decreases, the balance piston 18 moves to the inlet 20 side by pressing the spring 19 because the ground resistance pressure increases. The opening of the inlet port 22 (orifice) becomes large, which acts to increase the flow rate flowing from the inlet 20.

When the pressure (ground resistance pressure) P ₁ on the outlet 2l side is lowered, the pressure difference P _o -P ₁ between the outlet 21 side pressure P ₁ and the inlet 20 side pressure P _o is large. Although the injection speed increases, the balance piston 18 moves to the outlet 21 side. By this movement, the inlet port 22 is throttled so that the opening becomes small, and the flow rate flowing from the inlet port 22 is reduced. That is, the flow rate control valve B according to the present invention operates to always discharge a constant discharge amount from the outlet 21, regardless of the pressure change on the outlet 21 side. In this way, even if there is a fluctuation in the ground injection pressure for each injection hole, the gelation proceeds during injection, and it operates so as to maintain a constant discharge amount even when the resistance pressure of the ground increases.

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In the injection, it is preferable to inject at the injection pressure and discharge amount most suitable for the soil layer to be injected. It is natural to maintain a predetermined pump pressure and to inject at a discharge amount corresponding to the pump pressure. However, the pump pressure is varied according to the change of the ground during injection, the change in penetration resistance with gelation, or the irregularity in injection operation. Easy to change In contrast, according to the present invention, it is possible to maintain a substantially constant discharge amount regardless of the pressure change on the outlet side by the above-described function.

7 is a sectional view of another example of the flow control valve B. FIG. In FIG. 7, the flow control valve C has a valve body 15, an inlet passage 16, an outlet passage 17, and a balance piston 18 similarly to the flow control valve B of FIG. 6. And a spring 19 are configured.

That is, in FIG. 7, by rotating the screw 24 and press-fitting in the direction of the spring 19, the balance piston is moved through the spring 19 so that the opening area of the inlet (orifice) 22 is reduced. The passage amount of the ground injection liquid 5 is reduced by making it narrow. As a result, the amount of passage of the ground injection liquid 5 discharged from the outlet 21 via the outlet port 23 decreases. On the contrary, by rotating the screw 24 in the opposite direction, the balance piston is moved in the opposite direction to the above, thereby increasing the opening area of the inlet (orifice) 22 and increasing the passage amount of the ground injection liquid 5. . As a result, the amount of the ground injection liquid 5 discharged from the outlet 21 via the outlet port 23 increases.

By using such a flow control valve C, it is possible to set the predetermined discharge amount by adjusting the screw 24 in advance based on the flow rate test before construction, and also, during the injection, the screw 24 according to the injection situation. It is also possible to adjust the discharge amount appropriately by turning.

8 is a cross-sectional view showing a specific example of the injection liquid return system used in the present invention. That is, Fig. 8 shows the liquid feed meter 13, that is, the liquid feed meter 13 on the liquid feed system 13 on the way from the injection liquid tank 4 to the distribution device 11, and the liquid feed pressure gauge on the downstream side. P _o ) and / or a feed flow meter f _o and at the same time, the injection liquid return device RA and the feed pressure gauge P _o or the feed flow meter f _o are respectively supplied to the flow pressure control device 10. This is an example of connection. In this case, the injection fluid return device (RA) is a liquid sending pressure gauge (P _o) and / or the liquid sending flow meter (f _o) information, the Soil infusion liquid 5, the liquid-delivery system (13 of the liquid delivery system 13 on the basis of from ), The liquid pressure of the liquid feeding system 13 is maintained at a desired pressure by classifying the return pipe R into the return pipe R. In addition, in the injection liquid return apparatus RA, the shaft 25 of the reversible motor 26 is moved up and down in the direction of the arrow in response to the above-mentioned signal to adjust the area of the opening of the return pipe R, thereby adjusting the return pipe R. By adjusting the return amount of the ground injection liquid 5), the pressure or flow rate on the liquid feed meter 13 side is set to a desired set value. These devices and the pump can be integrated to form the injection liquid pressurizing section 1 having a flow pressure control function.

Fig. 9 is a cross-sectional view of still another specific example of the throttle portion 7 according to the present invention. The throttle portion 7 receives an instruction from the flow pressure control device 10, and moves the shaft (by operating the reversible motor 26). 25) is moved in the direction of the arrow, and the ground injection liquid 5 fed into the conduit 6 is throttled by the shaft 25, thereby adjusting the aperture of the orifice (throttle). Based on the information from the pressure gauge 8 and / or the flow meter 9 connected to the apparatus 10, the ground injection liquid 5 in the liquid supply in the conduit 6 has a predetermined pressure range and / or an instantaneous flow range. The throttle a is adjusted to maintain the hydraulic pressure in the conduit 6 in the desired pressure range and / or the instantaneous flow rate range. In addition, although a constant aperture like an orifice maintains a constant flow rate, fluctuations in flow rate are not possible. As described above, when the throttle portion 7 is used, the flow rate of the conduit 6 can be automatically adjusted. Thus, in this invention, even if a pump is not provided with a return apparatus or an inverter, by installing a flow pressure control apparatus in a throttle part, it adjusts the hydraulic pressure of an upper side than a throttle part, and obtains the flow volume corresponding to the cross-sectional area of a throttle part, It is possible to bring a function of pressurizing the liquid pressurizing unit at a predetermined pressure. The reversible motor used in the present invention is the same as a normal induction motor, but is a motor made exclusively for forward and reverse rotation, and is frequently It has a rotating function, large column torque, and excellent maneuverability. When the shaft 25 moves to the left side of the door by the one-way rotation of the reversible motor, the opening of the throttle is narrowed, and the flow velocity increases, and the shaft 25 by the other direction rotation. If the) moves to the right side of the door, the opening of the throttle is widened to control the flow rate.

Fig. 10 is an explanatory diagram of another form of the throttle portion 7 used in the present invention, and Fig. 1L is an explanatory diagram showing the throttling state of Fig. 10. In Figs. 10 and 11, the ground injection liquid 5 A part or all of the conduit 6 (feed system) for feeding the condensate to the injection conduit 2 is formed by a flexible conduit 6a. The flexible conduit 6a is then pressed or squeezed by the conduit 6a. The throttle part 7 which adjusts the throttle of the cross section of the conduit 6b of the conduit 6a is provided. As a material used for this flexible conduit 6a, rubber, such as synthetic resin, is used, for example.

10 and 11, the throttle portion 7 of the structure shown in FIG. 10 and 11 presses or depresses the flexible conduit 6a to adjust the throttle of the cross section of the pipeline 6b, thereby inhibiting the pipeline 6b. The throttle part of the conduit 6b does not become clogged even if it does not exist, and therefore, for example, a suspension injection liquid flows.

As a concrete structure of this throttle part 7, as shown in FIG. 10, one hard piece 27 and 27 is provided, As shown in FIG. 11, this pair of hard pieces 27 and 27 are flexible. The conduit 6a is pressurized or squeezed by pressing the conduit 6a to push and collapse or restore the conduit 6b. In this case, the shaft 25 may be manually adjusted by moving the gear up and down. It is desirable to carry out automatically.

For example, as shown in FIG. 10, the throttle part 7 which concerns on this invention is provided with the reversible motor 26 and the shaft 25 which moves up and down by the movement of this motor 26. As shown in FIG. 28 is a gearbox. Of the pair of hard pieces 27 and 27, one of the pairs of hard pieces 27 and 27 is provided at, for example, a tip of the shaft 25 so as to be in close contact with or in contact with the flexible conduit 6a. Along the conduit 6a, it is arrange | positioned in the position which opposes one hard piece 27. As shown in FIG. As a result, as shown in FIG. 11, the flexible conduit 6a is sandwiched between the pair of hard pieces 27 and 27 by the vertical motion of the shaft 25 to press or relax.

In addition, as shown in FIG. 10 of the present invention, the pressure gauge 8 and / or the flow meter 9 in the liquid delivery system conduit 6 (or the flexible conduit 6a) downstream from the throttle portion 7 For example, the electromagnetic flowmeter 8 is installed, and the flow pressure control device 10 is also provided. The controller 10 sets a desired flow rate, and is connected to the pressure gauge 8 and / or the flowmeter 9 and the reversible motor 26 of the throttle portion 7 to the pressure gauge 8 and / or the flowmeter 9. On the basis of the information from), the throttle portion 7 is instructed and the reversible motor 26 is operated, and the shaft 25 is moved up and down to press or squeeze the flexible conduit 6a to adjust the throttle. Adjust to the set desired flow rate. As the hard pieces 27 and 27, a hard rod-shaped body made of, for example, hard plastic or metal is used.

In FIG. 10, the control device 10 may be connected to the injection liquid pressurization part 1 in addition to the throttle part. That is, for example, the injection liquid pressurization part 1 of FIG. 1 is also connected to the pump 14, and is based on the information from the pressure gauge 8 and / or the flow meter 9, and the injection pressurization part 1 ( The pump 14 is instructed and, for example, the inverter is instructed to raise and lower the rotational speed of the pump 14 to adjust the pressurized state of the ground injection liquid 5. In addition, although not shown, this control apparatus 10 can adjust a return apparatus, and can adjust an amount of return so that the pressure upstream rather than the throttle part 7 may maintain a predetermined value.

As described above, the ground injection liquid 5 is pressurized and fed through the injection liquid pressurization part 1, and subsequently, as shown in FIG. 10, the vertical movement of the throttle part 7 provided in the flexible conduit 6a is free. The flexible conduit 6a is fitted by the hard piece 27 of the shaft 25 to regulate the flow rate. If the cross section of the flow path inserted into the hard pieces 27 and 27 and the throttled flow path is a, the flow path ( a) an instantaneous flow rate q of the liquid flowing through the injection (5) is rigid part (27,27) than the upstream pressure P _o and the injection pipe (2) in the differential pressure of the pressure P ₁ (ground juipap) △ P = P _o -P _The larger the differential pressure ΔP and the larger the flow path a, the larger the instantaneous flow rate q. Further, q approaches zero as ΔP approaches zero.

Therefore, even if the ground injection pressure P ₁ fluctuates with the passage of the injection, the injection pressure increases, and even if ΔP decreases, the instantaneous flow rate q can be maintained in a predetermined range by increasing the flow path a, or by decreasing the flow path a. By reducing the instantaneous flow rate, the rise of P ₁ can be suppressed to reduce the ground compensation.

And these adjustments can be made for each conduit 6 (flexible conduit 6a). That is, according to the present invention, the pressure of the injection pressurization part 1 and the shaft 25 of the throttle part 7 are adjusted. Due to the fluctuations in the cross section of the flow path a, the injection pressure and the instantaneous injection amount (injection speed) can be adjusted for each conduit 6 (flexible conduit 6a) according to the injection situation. By lowering the instantaneous injection amount, it is possible to continue the injection until the predetermined amount is reached at a low pressure, or it is possible to inject the predetermined injection amount with minimum ground displacement.

In addition, unlike the throttle portion 7 of FIG. 10 used in the present invention, which directly blocks the flow of the ground injection liquid 5 of FIG. 9 with the shaft 25, as shown in FIG. Since the flow rate is adjusted by fitting the flexible conduit 6a into (27, 27), even if a suspension is used, the flexible conduit 6a is not blocked by the ground injection liquid 5.

FIG. 12 is a modified example of the throttle portion 7 of FIG. 10, wherein a plurality of conduits 6a, 6a... 6a are respectively connected to a plurality of injection conduits 2, 2. 27) simultaneously adjust the throttle of the conduit 6b of the conduit 6a. It is used when the ground conditions are almost the same, and the injection conditions are almost the same, and are injected simultaneously from a plurality of injection pipe paths. In this case, the pressure and / or flow rate downstream from the throttle portion 7 is one conduit. It is enough just to measure.

13 and 10, as another example of the throttle portion 7 shown in FIG. 10, the discharge amount of the plurality of flexible conduits 6a, 6a ... 6a is respectively adjusted to the respective throttle portions 7, 7 ... 7. Each conduit 6a passes through an injection pipe line, and can be injected at an optimum discharge amount according to the injection situation of each injection pipe line.

14 is a flow sheet of another specific example of the ground injection apparatus according to the present invention. In FIG. 14, the ground injection device A includes the ground injection liquid 5 in the injection liquid tank 4 in the ground 3 through one or a plurality of injection pipe passages 2, 2. The ground injection device A according to the present invention is basically provided with the injection liquid pressurization unit 1, the throttle unit 7, and the conduits 6, 6... 6. It is configured. In Fig. 14, the portion on the left side is a device using one injection pipe path 2 than the broken line drawn in the longitudinal direction of the center, and the entire drawing from which the broken line is removed shows a plurality of injection pipe paths (2, 2 ... 2). In the description, the two are the same, and therefore, both descriptions are given as an example using the plurality of injection pipe passages (2, 2 ... 2) according to FIG. L4. An example using one injection pipe passage (2) is a broken line. Part of the left side of the. In this ground injection device A, the flow control valve B or C shown in FIG. 6 or 7, the throttle part of FIG. 9 or FIG. 10, or the like can also be used as the throttle part 7.

The injection liquid pressurization unit 1 is connected to the injection liquid tank 4 through a conduit (feeding system 13), and introduces the ground injection liquid 5 in the tank 4 into the injection liquid pressurization unit 1, This injection liquid pressurization part 1 is specifically comprised by 1 pump or as shown in FIG. 4, Comprising: It is comprised by multiple pumps 14,14 ... 14 in parallel, Although not shown, it consists of an injection liquid pressurizing part which transfers the injection liquid by applying pressure from a compressor to the pressure-resistant container which satisfy | filled the injection liquid.

The conduits 6, 6... 6 are communicated with the injection liquid pressurization unit 1 through the liquid feeding system l3, respectively, and the injection liquid pressurized by the injection liquid pressurization unit 1 receives the injection pipe passages 2, 2. These conduits (6, 6 ... 6) are provided with a pressure gauge (8) and / or a flow meter (9) at the throttle portion (7) and downstream thereof, respectively. l2 is a connecting portion connecting the inlet line 2 and the conduit 6 in the ground 3. The ground injection device A according to the present invention also includes a flow pressure control device X, as shown in FIG. This control device X is equipped with respective conduits 6, 6... 6, for example of the device of FIG. 14, connected to a pressure gauge 8 and / or a flow meter 9 of each conduit 6. In addition, it is also connected to the throttle part 7, and an indication is sent to the throttle part 7 based on the information from the pressure gauge 8 and / or the flowmeter 9.

The throttle part 7 receives an instruction from the control device 10 and adjusts the throttle to maintain the predetermined pressure range and / or the instantaneous flow rate range in the conduit 6 so that the throttle of the conduit 6 Maintain the hydraulic pressure in the desired pressure range and / or the instantaneous flow rate range.

That is, the injection liquid 5 in the injection liquid tank 4 is injected into the ground 3 from the injection pipe passage 2 through the liquid feeding system 13 through the conduit 6 from the injection liquid pressurization unit 1, At this time, the throttle 7 is injected while giving an instruction of the throttle to maintain the hydraulic pressure in the conduit 6 in a desired pressure range and / or an instantaneous flow rate range. Accordingly, the injection liquid pressurization unit 1 pumps The function of pressurizing the injection liquid to a predetermined pressure is added even if the return device or the inverter is not provided directly with the 14.

9, a desired pressure value and / or a flow rate value are set in advance in the flow rate pressure control device 10, and in this state, the actual pressure value from the pressure gauge 8 and / or the flow meter 9 is set. And / or send the flow rate value to the controller 10. The reversible motor 26 is built in the throttle portion 7, and the reversible motor 26 is moved so that the actual pressure value and / or flow rate value approaches the set value and maintains the same value by the instruction of the control device 10. By forward or reverse rotation, the shaft 25 is swung up and down or left and right to adjust the opening degree, and the flow rate of the injection pipe 2 is adjusted.

In addition, in this invention, the control apparatus 10, the throttle part 7, and the pressure gauge 8 and / or the flowmeter 9 can also be integrated, and can be used as a flow pressure control apparatus X. FIG.

Thereby, the discharge amount and / or discharge pressure of the injection liquid conveyed from each conduit 6 to the injection conduit 2 is not only maintained in a desired range, but also one of the plurality of conduits 6, 6 ... 6 is injected. Even when the engine is stopped, the discharge amount and / or discharge pressure of the remaining conduits 6 are also maintained in the desired range.

15 shows an example in which one control device 10 is provided. In this case, the pressure gauge 8 and / or the flow meter 9 of the plurality of conduits 6 is connected to one control device 10 and at the same time. In addition, an instruction is given to each throttle portion 7 from one control apparatus 10. Therefore, since only one control apparatus 10 is required, the apparatus is simplified. In addition, in Fig. 15, a plurality of conduits 6 , 6... 6 are connected to the dispensing apparatus 11, and a plurality of conduits 6, 6... 6 are branched from the dispensing apparatus 11.

In addition, in FIG. 15, the pump which has the inverter 1a as the injection liquid press part 1, and the return line R shown in FIG. 1 and FIG. 8 as the throttle part 7 are provided. In addition, when the throttle portion 7 of Fig. 9 is used, the differential pressure ΔP ₁ decreases as it is injected, and the inverter (or continuously variable transmission. The pump having these is adjusted with an injection speed variable pump) 1a is adjusted to Po. It can raise and △ P. In addition, the shaft 25 may be adjusted by the throttle portion 7 so that the flow passage A maintains the most appropriate flow rate and pressure depending on the injection situation of each injection pipe passage 2.

Further, hameuroseo the △ corresponding to P ₁ by adjusting the shaft 25 to adjust the returning amount to, can be adjusted according to the change of the injection conditions in the flow rate to the respective injection duct (2) for each injection duct (2) In addition, the distribution apparatus 11 of FIG. 15 and FIG. 16 is a pressure-resistant container installed in the liquid feeding system 13, and several conduits 6, 6 ... 6 are branched from this container. In this way, the injection liquid is classified into each conduit 6, 6, 6 under the same conditions.

FIG. 16 shows, in the apparatus of FIG. 15, a liquid feeding system l3, that is, an injection liquid return device RA to a conduit (feeding system 13) on the way from the injection liquid pressurizing unit 1 to the conduit 6. And a pressure gauge 8a and / or a flow meter 9a on the downstream side, and at the same time, these injection liquid return devices RA and a pressure gauge 8a or a flow meter 9a are connected to the control device 10, respectively. One example. In this case, the injection liquid return device RA divides the injection liquid in the liquid delivery system 13 from the liquid delivery system 13 to the return pipe line R based on the information from the pressure gauge 8a and / or the flow meter 9a. The liquid pressure of (13) is maintained at a desired pressure. In this case, too, the injection liquid return device RA, the pressure gauge 8a and / or the flow meter 9a, and the control device 10 are integrated to the flow pressure control device Xa. You may. Thereby, the discharge amount and / or discharge pressure of the injection liquid delivered from the liquid feeding system l3 to the conduit 6 at the stage of the liquid feeding system l3 before the injection liquid is introduced into the conduit 6 is maintained in an appropriate range. Can be.

Fig. 17 is a simplified block diagram of an example in which two liquids of the liquid A and liquid B according to the present invention are joined in the injection pipe line 2 or the ground 3, which is an example connected to the central management unit X. In this case, the feed pressure gauge P ₀ and / or the feed flow meter f ₀ and the pressure gauge 8 and / or flow meter 9 of the plurality of conduits 6, 6 ... 6 are connected to the central management unit X1 of the central management unit X, From the centralized control device X1, the throttle portion 7, the return device RA, and the injection monitor X2 are instructed.

Fig. 18 shows an example in which the ground injection device A according to the present invention is connected to the central management unit X. In Fig. 18, X is the central management unit, the central management unit Xl, the injection monitoring unit X2, the daily report generating unit X3, the printer X4, and the like. Construction display board X5 is included. In FIG. 18, 29 is a stop valve, 30 is a lamp, and 31 is a start switch.

In Fig. 18, a pressure gauge 8 and / or a flow meter 9 and a throttle part 7, 7 ... 7 are provided in each conduit 6, 6, 6, respectively, and the pressure gauge 8 and / or flow meter (9) is connected to the centralized management device Xl, and the throttle portion 7 is connected to the construction display panel X5 directly or via the stop valve 29, and the construction display panel X5 is connected to the centralized management device X1. In Fig. 18, these data can be displayed on the injection monitoring panel X2 to monitor the injection status collectively. The injection monitoring panel X2 includes the "time data" such as the injection date, the injection time, the injection block number, the hole number of the injection hole, the "place data" such as the injection point, the injection pressure, and the flow rate (unit time flow rate and accumulated flow rate). "Injection data" is displayed and these injection data are recorded by the central management device X1. In addition, as will be described later, the injection liquid identification data and the ground (or structure) displacement data can be displayed.

In FIG. 18, the ground injection liquid is injected from the injection liquid pressurization unit 1 via a liquid feeding meter l3, a flow pressure control device 10, and a distribution device ll, and a plurality of conduits 6, 6. … Injecting into the plurality of different injection points in the ground 3 at the same time through each of the flow rates of the injection liquid detected from each pressure gauge 8 or the flow meter 9 of the plurality of conduits 6, 6… 6 And / or the pressure data is sent to the centralized management device X1 and displayed on the infusion monitoring panel X2 to display the construction status. By the screen display of such data, the injection of the injection liquid is managed by performing the collective monitoring of the injection situation. Is recorded.

A specific example will be described with reference to FIG. 18. The injection liquid from the injection liquid tank 4 is controlled to a constant pressure by the pump 14 and the flow pressure control device 10 of the liquid feeding system 13 to distribute the distribution device 1 l. ), Followed by a plurality of conduits (6, 6 ... 6), through the throttle (7) incorporating an orifice (not shown) through the injection pipe passage (2, 2, ... 2) Is injected into.

At this time, the flow rate signal and / or the pressure signal detected by the pressure gauge 8 and / or the flow meter 9 provided in the conduits 6, 6 ... 6 are transmitted to the centralized management device X1 of the central management unit X, and the injection monitoring panel. A screen is displayed on X2 to collectively monitor the injection status.

The daily report generating device X3 (personal computer) and the printer X4 are connected to the centralized management device X1, and each recorded data is created as a daily report by the daily report generating device X3, and printed out by the printer X4.

The apparatus of FIG. 18 is demonstrated, showing the operation flowchart of centralized management apparatus X1 in FIG. 19. In FIG. 18, the pressure prescribed | regulated value of the injection specification file regarding the numbers 1-10 of the conduits 6, 6 ... 6 is shown first. (Preferred pressure range), prescribed injection volume (predicted integrated injection range), that is, desired injection pressure and flow rate (flow rate and / or accumulated flow rate per unit time) are set in advance in the centralized management device X1 (system specification setting registration), and then The data recording is started by turning on the start switch 31 of the numbers 1 to 10 of the central management device X1.

At this time, the lamp 30 is also displayed on the construction display panel X5. In the injection monitoring panel X2, the injection data from the conduit (6, 6 ... 6) is displayed on the screen, and when these data reach the set value, the centralized management device (Xl) outputs a completion signal or an alarm signal to the injection monitoring panel X2. At the same time, a completion state or a stop signal is indicated by the lamp 30 on the construction display panel X5, and a signal for closing the stop valve 29 of the conduits (6, 6 ... 6) is output.

After the injection of all the conduits 6, 6, 6 is completed, the recording of the data by the centralized management device X1 is terminated by turning off the start switch 31 of the centralized management device X1. A daily report or the like is created by the daily report creating device X3, and printed out by the printer X4.

In FIG. 18, the centralized management device X1 records and monitors the flow rate or pressure data from the pressure gauge 8 and / or the flowmeter 9 arranged in the ten conduits 6, 6. In addition, the device X1 is configured to stop or finish the injection by a predetermined pressure value (or prescribed pressure range), prescribed instantaneous flow rate value (or prescribed instantaneous flow rate range), and prescribed integrated injection amount (or prescribed integrated injection rate range), respectively. Automatic judgment is made.

The details are as follows.

Measurement data flow rate: 0 to 30.0 1 / min

                    Pressure: 0-3.00 MPa

Calculated data accumulated flow: 0 to 99999l

                   Max pressure: 0 to 3.00 MPa

Recording medium flash memory card

Recording time 1 minute data recording (may be 30 seconds or 10 seconds of data)

(Flow rate, pressure, accumulated flow rate, maximum pressure for 10 systems)

Injection monitoring:

Based on the injection specification file, the accumulated injection amount data and the pressure data are monitored by the registered prescribed injection amount and the prescribed pressure. When the injection pressure is equal to or higher than the prescribed pressure, or the injection amount (accumulated flow rate) is equal to the prescribed integrated injection amount (regulated integration flow rate). In the early case, the centralized control device X1 outputs the closed signal of the stop valve 29 and lights up the lamp to indicate completion or interruption. (Complete or stop by pressure regulation, or completion by prescribed injection quantity. Authorization is displayed on the screen.)

Surveillance screen:

The data for the 10 liquid feeding systems (40 data in total, flow rate, pressure, cumulative flow rate, and maximum pressure) shown in Fig. 18 are displayed in one screen on the injection monitoring panel X2. Fig. 20 shows the 10 liquid feeding system parts in Fig. 18. Displays a screen displaying data.

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The screen of Fig. 20 is described in detail as follows.

2nd half screen:

Group 1: Digital display of total flow rate and maximum pressure of Nos. 1 to 5

        (Left 5 liquid feeding system in Fig. 18)

Group 2: Digital display of total flow and maximum pressure of Nos. 6 to 10

        (Fig. 18 right side 5 liquid feed system)

  The accumulated flow rate is the injection rate for 20 minutes. The maximum pressure is displayed every 30 seconds, and the maximum value is displayed between 19 minutes and 30 seconds to 20 minutes. An alarm signal is output when the maximum pressure continues above the set pressure. Therefore, the injection of the liquid feeding system is judged to be stopped or terminated. Also, even when the accumulated flow rate reaches the set accumulated flow rate, the injection of the liquid feeding system is judged to end.

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2nd half screen:

Group 3: flow rate and pressure trend indications of Nos. 1 to 5

       (Left 5 liquid feeding system in Fig. 18)

Group 4: flow rate and pressure trend indications of Nos. 6 to 10

       (Fig. 18 right side 5 liquid feed system)

The left side of each screen shows a chart of the instantaneous flow rate and the instantaneous pressure corresponding to the passage of time t in each liquid supply system, and the right side shows the average instantaneous flow rate from 19 minutes 30 seconds to 20 minutes (1 / minute). ) And average instantaneous pressure (MPa).

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In this manner, as shown in the screen of FIG. 20, the feed monitoring system No. The liquid feeding status of 1 to 10 is displayed at the same time, but it can also be displayed while switching the screen for each liquid feeding system. In addition, the set pressure, the actual pressure, and the flow amount of the liquid supplied to the dispensing device 11 and the accumulated liquid flow rate in the flow pressure control device 10 may be displayed on the same screen or on different screens. The relationship between the hydraulic pressure, the pressure of the plurality of conduits 6, 6, ... 6, and the flow rate can be grasped by real time processing, and the injection can be managed to fall within a predetermined setting range.

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In addition, in FIG. 20, the pressure and the flow volume in the liquid feeding system 13 of FIG. 18 may be displayed instead of the maximum pressure. In addition, the centralized management device X1 includes an injection specification file, an injection result list, and an injection chart. In addition, document preparation and analysis data such as a daily schedule, a weekly schedule, and a monthly schedule can also be created.

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The injection specification file is an operation setting file (system specification setting in FIG. 19) of the centralized management device X1, and sets the prescribed pressure value and prescribed injection amount of the injection completion conditions of the conduits 6, 6, ... 6. . In addition, a return system for adjusting the throttle of the throttle portion 7 of the conduit 6, the inverter of the pump 14 in the injection liquid pressurization unit 1, and the fluid pressure in the dispensing device 11 to be maintained at a set value. The injection specification is made to adjust (RS). Each document file is prepared by converting each data of recorded flow rate, pressure, cumulative flow rate or maximum pressure, and data by manual or automatic input such as no. do. Analysis data is converted from each document data.

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Further, in the screen of Fig. 20, one for each conduit, for example, the block No. and the injection hole No. for each injection point in the injection hole. And the stage number, pressure, flow rate, and chart can be displayed.

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Also, from these data, the injection pressure P, the flow rate Q, and the accumulated flow rate l for the time t can be displayed for each injection hole, for example, for each stage.

Fig. 21 is a sectional view of a state in which the injection pipe line according to the present invention is embedded in the ground, and shows an example in which the injection pipe line 2 formed by binding a plurality of fine pipes 32 as the injection pipe line 2 is used.

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Each of the tubules 32, 32, ... 32 is provided in the ground 3 so that the tip discharge port 33 is opened to the position which differs in the axial direction, respectively, and is embedded in the sleeve grout 35 loaded in the hole 34. As shown in FIG. The ground injection liquid from the discharge port 33 breaks the solidified sleeve grout 35 and penetrates and is injected into the ground 3 through the ground wall 3a. In addition, this sleeve grout 35 does not need to be used.

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Fig. 22 is a cross-sectional view of another injection pipe in accordance with the present invention embedded in the ground. As the injection pipe 2, a plurality of fine pipes 32, 32, ... 32 are bound by the band 37, and a plurality of pipes are provided. An example of the use of the injection pipe line 2 formed by mounting the envelope packers 36, 36, ... 36 at intervals in the axial direction is shown. The capillary 32 has a front end discharge port 33 with an envelope packer 36. The band 37 so as to be positioned between the inner side and the envelope packers 36 and 36, respectively.

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When the injection pipe path 2 is installed in the ground 3, first, the bag packer 36 is inserted into the hole 34 without expanding the bag packer 36, and then the discharge hole (3) is introduced into the bag packer 36 through the tubule 32. 33, the envelope packer 36 is expanded by filling various kinds of fluids such as a solid matter which expands and solidifies the envelope packer 36 or an inert gas such as water, brown water, and air nitrogen gas. The ground injection liquid is discharged from each other, and the ground injection liquid is penetrated into the ground 3 from the space 38 between the bag packers 36 and 36.

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Fig. 23 also shows an example in which another injection pipe line is embedded in the ground, as the injection pipe 2, and the double pipe double packer injection pipe line 2a is used.

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The injection pipe passage 2a is composed of an inner tube 39, an outer tube 40, and a capillary tube 32. The inner tube 39 is provided with a packer 36a that is vertically spaced apart from the front end portion, and the inner tube discharge port ( 39a). First, after the injection pipe path 2a is inserted into the cut hole 34 of the ground 3, each bag packer 36, 36,..., 36 is discharged from the discharge port 39a of the inner pipe 39. The hardened | cured material is filled and expanded, and the envelope packers 36, 36, ... 36 are formed. In this state, the ground injection liquid is injected into the ground 3 from the discharge port 32a of the tubule 32, and the ground 3 is solidified. Although the discharge port 40a of the external appearance 40 is provided between the up-and-down adjacent bag packers 36 and 36, this is not necessarily required. In addition, through this external discharge port 40a, the permeation test of the ground 3 can be performed after the injection. If the test result indicates that the injection is insufficient, the ground injection liquid is re-injected from the discharge port 40a of the external appearance 40. In FIG. 23, 4l is a rubber sleeve, and the discharge port is covered by this rubber sleeve 41. In FIG.

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In the present invention, the other injection pipe, for example, although not shown, is composed of a double pipe, an inner pipe, an outer pipe and a middle pipe having a single pipe, an inner pipe and an outer appearance having a tip discharge port, and each having an inner pipe discharge port and an external discharge port at the tip. It is also possible to use a triple pipe having a discharge port, an external discharge port, and a heavy pipe discharge port, respectively. In the triple pipe described above, any of a plurality of pipe lines may be provided in parallel in the outer tube, and the discharge port may be provided at a position different in the axial direction of the outer tube.

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The ground injection liquid 5 used in the present invention is arbitrarily selected from the injection liquids shown in the following a) to g). Since all of these injection liquids 5 can be set to a gelation time of several tens of hours, a large amount of injection liquid Not only do not worry about gelation, but also a large amount of the injection liquid can be sent over a long time, and after injecting into the ground, and gelling reliably, and the viscosity is small and less sticky, return device or orifice, Silica gel is not clogged in the throttle valve and the like, which is extremely excellent as a ground injection liquid used in the apparatus. In addition, a suspension injection liquid such as cement or slag also has an apparatus having a throttle portion shown in FIGS. 9 and 10. It is difficult to be clogged by use, and is suitable for the present invention. Moreover, as shown in Fig. 17, a plurality of sets of the present invention are used, and the main material and the reactant, respectively. Is fed through the respective branch pipes, joined in the injection pipe passage, or discharged into the ground and then reacted in the ground, all the injection material can be injected.

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a) Injection liquid containing silica solution with a concentration of 0.1-8 wt% silica obtained by removing some of alkali or ion exchange resin or ion exchange membrane in the water glass; or injection made by adding water glass, acid, salt, etc. liquid.

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b) Injection solution containing silica solution of 0.1-8 wt% silica concentration in non-alkali region obtained by neutralizing alkali of water glass with acid, or metal ion in injection solution with ion exchange resin or ion exchange membrane. Or infusion obtained by removing all or part of the roots.

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c) An injection liquid whose main material is colloidal silica obtained by assembling silica obtained by removing alkali by ion exchange of water glass.

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d) Injection liquid whose main material is the silica solution which adds water glass and / or colloidal silica to the silica solution obtained by removing alkali of water glass.

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e) Injection liquid whose main material is a silica solution formed by mixing water glass, colloidal silica and a reactant.

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f) Suspended infusions using cement or clay as an active ingredient.

g) slag, in particular particulate slag with a specific surface area of 800 cm ² / g or more and alkali (cement, lime, water glass, caustic alkali, sodium aluminate, sodium carbonate, sodium bicarbonate, etc.).

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h) An injection liquid in which water glass aqueous solution and a polyvalent metal compound are injected into each ground from each injection liquid feeding system and reacted in the ground.

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i) An injection liquid in which the water glass aqueous solution and the reactive agent aqueous solution are fed to each injection liquid feeding system and joined, and injected into the ground.

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In the above, the injection liquids a) to e) have a low viscosity and have a long gelling time. Therefore, the gel does not adhere to the throttle portion. In addition, since the gelling time can be several ten hours, the injection liquid Even if it is returned, it does not worry about thickening and gelation until the injection is completed.

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In the following description,

(1) Water glass is mixed with sulfuric acid or phosphoric acid, or aluminum salts such as aluminum sulfate or aluminum chloride are added to prepare an aqueous silica solution having a pH of 0.5 to 7 and a SiO ₂ concentration of 0.1 to 8% by weight. Such a silica solution can adjust the gelation time from 1 hour to several tens hours, and can maintain a low viscosity of 1.1 to 3.0 cps / 20 ° C until immediately before gelation, and the strength is from 1 to 8 kgf / cm as a coarse standard yarn. can be a ^two uniaxial compressive strength. Thus, even when injected with these infusion solutions returned a few hours, because the injection device of the present invention to operate properly, it can be described as very good infusion solutions suitable for the invention apparatus.

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(2) Treating the water glass with an ion exchange resin or an ion exchange membrane to bond and stabilize the molecular weight to tens of thousands or more by heating an active silicic acid aqueous solution obtained by removing alkali, and then, the SiO ₂ content is concentrated to 20 to 30%, pH value Was stabilized at about 9 to 10 to prepare colloidal silica.

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The colloidal silica solution is diluted to give a silica solution with a SiO ₂ content of about 0.1% to 20%. Neutrality such as NaC1 or KC1 is added to the gel, and the gelation time is adjusted to several tens of hours before being injected into the ground.

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Here, using the apparatus according to the present invention shown in Figs. 17 and 18, an aqueous solution containing water glass as the active ingredient A and an alkaline earth metal chloride such as calcium chloride, magnesium chloride, and polyvalent metal chloride such as aluminum chloride as the liquid B The aqueous solution containing the active ingredient was injected into the ground (3) as follows through different conduits (6), and the A and B liquids were reacted in the ground (3) to solidify the ground (3).

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(1) After A liquid is injected, B liquid is injected.

(2) After injecting B liquid, A liquid is injected.

(3) Inject A and B solutions alternately.

(4) Inject A and B solutions simultaneously.

In the above, the flow rate signal or the pressure signal detected by the flow rate pressure detectors 8, 9 of the conduit 6 is transmitted to the centralized management device X1 to inject the conduits 6, 6,... 6 of each injection liquid. The situation is grasped, and these injection conditions are displayed on the injection monitoring panel X2 and collectively monitored to perform injection management. At this time, specifications are set in the centralized management device X1 with respect to the range of the flow rate, the pressure range and / or the accumulated flow rate range, and the A and B solutions are injected into the ground, respectively, until any of the following phenomena occurs. Inject repeatedly.

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(1) The injection reaches a predetermined pressure range or injection amount.

(2) The injection pressure rises, making injection difficult or the injection pressure at a set limit.

(3) Ground uplift occurs, or ground uplift is within the set limits.

 Alkaline earth metal chlorides and polyvalent metal chlorides as the liquid B react with water glass grout to form a precipitate. The precipitate releases water by pressurization and becomes a compressed gel.

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As described above, the present invention injects the ground injection liquid into the ground through one or a plurality of injection pipes installed in the ground, and when the ground is solidified, the injection liquid pressurizing portion for pressurizing the injection liquid, the injection liquid One or more conduits connected to the pressurizing unit and for feeding the injection liquid pressurized by the pressurization unit to the one or the plurality of inlet pipe paths, and a throttle portion respectively provided on the conduit and a branch pipe downstream of the conduit. Ground injection provided with an installed pressure gauge and / or flow meter, and a control device connected to the pressure gauge and / or flow meter to receive information therefrom, and connected to the throttle part to give instructions to the throttle adjusting device based on these information. Ground injection is performed using the device.

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Therefore, when the injection liquid is injected into the ground from the injection pipe passage from the injection liquid pressurizing portion through the conduit, the injection can be performed while giving the throttle instruction to the throttle portion to maintain the hydraulic pressure in the conduit at a desired pressure.

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Therefore, while maintaining the discharge amount and / or discharge pressure of the injection liquid conveyed from each conduit to the injection pipe line in a desired range, even if any of the plurality of conduits stops injection, the discharge amount and / or the remaining branch pipes The discharge pressure can be maintained in a desired range.

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1 is a flow sheet of one embodiment of the apparatus of the present invention.

Fig. 2 is a graph showing the relationship between the resistance pressure P at the orifice diameter φ2.Omm and the flow rate f from the orifice with respect to the respective hydraulic pressures.

Fig. 3 is a graph showing the relationship between the resistance pressure P at the orifice diameter φ2.5mm and the flow rate f from the orifice for each hydraulic pressure.

4 is an explanatory diagram of another specific example of the injection liquid pressurizing unit according to the present invention.

5 is a flow sheet of a modification of the ground injection apparatus according to the present invention.

Fig. 6 is a sectional view of one embodiment of a flow control valve used as the throttle portion of the present invention.

7 is a cross-sectional view of a modification of the flow control valve used in the present invention.

Fig. 8 is a sectional view of a specific example of an injection liquid return system used in the present invention.

9 is a cross-sectional view of another specific example of the throttle portion according to the present invention.

10 is an explanatory diagram of still another form of the throttle portion according to the present invention;

Fig. 11 is a partial cross-sectional view showing the operating state of the throttle portion of Fig. 10.

12 is a partial cross-sectional view of a modification of the throttle portion in FIG. 10.

FIG. 13 is a partial cross-sectional view of still another modification of the throttle portion in FIG. 10. FIG.

Fig. 14 is a flow sheet of another specific example of the ground injection apparatus according to the present invention.

Fig. 15 is a flow sheet of still another specific example of the ground injection apparatus according to the present invention.

Fig. 16 is a flow sheet of still another specific example of the ground injection apparatus according to the present invention.

Fig. 17 is a flow sheet of one embodiment of the apparatus of the present invention connected to a central management unit.

FIG. 18 is an explanatory diagram specifically showing the apparatus of FIG. 17. FIG.

Fig. 9 is a flowchart of operation of the centralized management device X1.

FIG. 20 is a screen showing data for 10 liquid feeding systems in FIG.

Fig. 21 is a sectional view of a state in which an injection pipe of one embodiment according to the present invention is embedded in the ground;

Fig. 22 is a cross-sectional view of a state in which an injection pipe of another specific embodiment of the present invention is embedded in the ground;

Fig. 23 is a cross-sectional view of a state in which an injection pipe according to another specific embodiment of the present invention is embedded in the ground. Ground injection device, B. Flow control valve C. Flow control valve, X. Central control unit X1. Central Management Unit, X2. Injection Monitoring Panel X3. Daily report writing device, X4. Printer X5. Construction display board, 1. Injection liquid pressurization part 1a. Inverter, 2. inlet line 3. Ground, 3a. Ground wall 4. injection liquid tank, 5. ground injection liquid 6. Conduit, 6a. Conduit 7. Throttle part, 8. Branch pressure gauge 9. Branch flow meter, 10. Flow pressure control device 11. Branch device, 12. Connection 13. Liquid meter, 14.pump15. Valve body, 16.inlet passage 17. Outlet passage, 18. Balance piston 19. Spring, 20.inlet21. Outlet, 22.inlet 23. Outlet, 24. Screw 25. Shaft, 26. reversible motor 27. Hard piece, 28. Gearbox 29. Stop valve, 30. Lamp 31. Start switch, 32. Customs pipe 32a. Customs discharge outlet 33. Hole, 35. Sleeve grout 36. Envelope packer, 36a. Packer 37. Band, 38. space 39. Inner tube, 39a. Inner pipe discharge 40. Appearance, 40a. Exterior outlet 41. Rubber sleeve

Claims (27)

In the ground injection device for injecting the ground injection liquid into the ground through a plurality of injection pipes provided in the ground, and solidifies the ground, An injection liquid pressurizing portion having a return device and / or an inverter having a flow pressure control function of the injection liquid, and for pressurizing the injection liquid to a predetermined pressure; A ground injection device comprising a conduit delivered to a conduit and a throttle portion provided in the conduit. delete The method of claim 1, A pressure gauge and / or a flow meter are provided in the conduit downstream from the throttle portion, and the throttle portion is fed from the conduit to the inlet line by adjusting the throttle based on information from the pressure gauge and / or the flow meter. A ground injection device for adjusting the discharge amount and / or discharge pressure of the injection liquid to be made. The method of claim 1, The ground injection device, wherein the throttle portion is an orifice or a flow control valve in which a flow area is set to a predetermined value. The method of claim 1, The throttle part includes a reversible motor and a shaft connected to the reversible motor and moving up and down by the operation of the motor, and the shaft is inserted into the conduit of the conduit from the distal end and moved up and down. Ground injection device for adjusting the throttle of the cross section of the The method of claim 1, A conduit is a ground injection device formed by diverging from a distribution device in communication with an injection liquid pressurization unit. A ground injection apparatus for injecting ground injection liquid into a ground through a plurality of injection pipes provided in the ground and solidifying the ground, comprising: a return device and / or an inverter having a flow pressure control function of the ground injection liquid; An injection liquid pressurizing portion for pressurizing the injection liquid, a conduit in communication with the injection liquid pressurization portion, a part or all of which transfers the injection liquid to the injection pipe passage made of a flexible or elastic conduit, and a flexible or elastic portion of the conduit A throttle portion which is installed in the duct and presses or squeezes the conduit to adjust the throttle of the cross section of the conduit, wherein the throttle portion adjusts the throttle, thereby discharging the amount of injection liquid delivered from the conduit to the injection conduit and / or A ground injection device, characterized in that for adjusting the discharge pressure. delete The method of claim 7, wherein The throttle portion also includes a reversible motor and a shaft connected to the reversible motor and moving up and down by the operation of the motor, wherein one of the pair of hard pieces is in close contact with or in contact with the flexible or flexible conduit. The other side is disposed in a position opposite the one hard piece while wearing the flexible or elastic conduit, and the flexible or elastic conduit is sandwiched between the pair of hard pieces by the vertical motion of the shaft to press or squeeze. One ground injection device. The method of claim 7, wherein A pressure gauge and / or a flow meter is provided in a conduit downstream of the throttle portion, and based on the information from the pressure gauge and / or the flow meter, the throttle portion moves the reversible motor and moves the shaft up and down to give the flexibility or elasticity. A ground injection device that presses or decompresses the conduit. The method of claim 7, wherein It is further provided with a control device, which is connected to the pressure gauge and / or the flowmeter to receive their information, and is also connected to the throttle part to give an indication to the throttle part based on these information to adjust the throttle, A ground injection device in which the injection liquid in the liquid feed is adjusted to a pressure and / or a flow rate in accordance with the situation in each injection pipe so as to be fed from the conduit to the injection pipe. The method of claim 7, wherein The conduit leading up to the throttle section is provided with an injection liquid return device, which adjusts the return amount based on information from the flow meter and / or pressure gauge, thereby injecting the injection liquid with the desired pressure. Ground injection device for holding and feeding to conduit. The method of claim 11, The control device is also connected to the injection liquid pressurization unit, and the ground injection unit is configured to adjust the pressurization state of the ground injection liquid by giving an indication to the injection liquid pressurization unit based on the information from the flow meter and / or the pressure gauge. The method of claim 7, wherein A conduit is a ground injection device formed by diverging from a distribution device in communication with an injection liquid pressurization unit. In the ground injection method of injecting ground injection liquid into the ground through a plurality of injection pipes installed in the ground, and solidifying the ground, An injection liquid pressurizing portion for pressurizing the injection liquid, a conduit communicating with the injection liquid pressurization portion and feeding the injection liquid to the injection pipe passage, a throttle portion provided at the conduit, and a pressure gauge provided at a downstream conduit; And / or the injection liquid is injected into the ground by means of a ground injection device equipped with a flow meter, through the conduit and the inlet pipe, and the ground injection device controls the flow pressure of the ground injection liquid in the injection liquid pressurization unit. A ground injection method comprising a return device and / or an inverter having a return, and the discharge amount of the ground injection liquid passing through the throttle portion is adjusted by adjusting the pressure from the injection liquid to the throttle portion to a predetermined value. delete The method of claim 15, Ground injection method in which the throttle part is an orifice or a flow control valve. The method of claim 15, The ground injection device also has a control device, which is connected to the pressure gauge and / or the flow meter to receive information from them, and is also connected to the throttle part to give an indication to the throttle part based on the information, In injecting the injection liquid into the ground from the injection press portion through the conduit and the injection pipe passage, the injection is performed while giving the throttle instruction to the throttle portion to adjust the throttle, whereby the injection liquid is fed from the conduit to the injection pipe passage. A ground injection method in which the discharge amount and / or the discharge pressure are adjusted according to the injection situation in the injection pipe line. The method of claim 15, The throttle part includes a reversible motor and a shaft connected to the reversible motor and moves up and down by the operation of the motor, and the shaft is inserted into the conduit of the conduit from the distal end and moved up and down to move the shaft up and down. Ground injection method for adjusting the throttle of the cross section. The method of claim 15, Ground injection amount, (a) Injection liquid whose main material is a silica solution obtained by removing part or all of alkali in water glass, (b) an injection liquid containing a silica solution in a non-alkali region obtained by neutralizing an alkali in a water glass with an acid; (c) an injection liquid based on colloidal silica; (d) an injection liquid containing, as a main material, a silica solution obtained by adding water glass and / or colloidal silica to a silica solution obtained by removing part or all of an alkali of a water glass; (e) an injection liquid whose main material is a silica solution formed by mixing water glass, colloidal silica and a reactant; (f) suspension suspensions containing cement and / or viscosity as active ingredients; (g) Suspension infusion liquid containing slag and alkali as an active ingredient; (h) an injection liquid in which water glass aqueous solution and a polyvalent metal compound are injected into the ground individually from each injection liquid feeding system, (i) A ground injection method selected from the group of the injection liquid to be injected into the ground by transferring the water glass aqueous solution and the aqueous solution of the reactant into the respective injection liquid feed systems. In the ground injection method of injecting ground injection liquid into the ground through a plurality of injection pipes installed in the ground, and solidifying the ground, An injection liquid pressurizing portion for pressurizing the injection liquid, a conduit made of a flexible or elastic conduit, in part or all, in communication with the injection liquid pressurization portion and transferring the injection liquid to the injection pipe passage, and the flexibility or elasticity of the conduit Injecting the injection liquid into the ground through the conduit and the injection pipe from the injection liquid pressurizing unit by using a ground injection device having a throttle portion which is installed in the portion and presses or decompresses the conduit to adjust the throttle of the ground injection liquid. And wherein the flexible or elastic conduit is pressed or squeezed by the throttle portion, thereby adjusting the discharge amount and / or discharge pressure of the injection liquid delivered from the conduit to the injection pipe line according to the situation in the injection pipe line. The injection liquid pressurizing unit further includes an injection liquid return device having a flow pressure adjustment function and / or The inverter is provided with a ground injection method, characterized in that for adjusting the discharge amount of the injection liquid passing through the throttle part by adjusting the pressure until the injection liquid reaches the throttle to a predetermined value.  The method of claim 21, A flowmeter and / or a pressure gauge are further provided in a conduit downstream from the throttle portion, and the reversible motor is operated by instructing the throttle portion based on the information from the flowmeter and / or the pressure gauge to move the shaft up and down. The ground injection method which vibrates and presses or compresses the said flexible or elastic conduit. The method of claim 21, In addition, using a ground injection device equipped with a control device, the control device is connected to the pressure gauge and / or the flow meter and connected to the throttle part, and receives information from the pressure gauge and / or the flow meter and based on this information. The ground injection method which gives an instruction | indication to a part, and injects, giving this instruction. delete The method of claim 21, A ground injection method comprising a plurality of injection pipe paths and feeding the plurality of injection pipe paths through a plurality of conduits. The method of claim 25, A ground injection method in which a plurality of conduits are branched from a dispensing device communicating with the injection liquid pressurization unit. The method of claim 21, Ground injection amount, (a) Injection liquid whose main material is a silica solution obtained by removing part or all of alkali in water glass, (b) an injection liquid containing a silica solution in a non-alkali region obtained by neutralizing an alkali in a water glass with an acid; (c) an injection liquid based on colloidal silica; (d) an injection liquid containing, as a main material, a silica solution obtained by adding water glass and / or colloidal silica to a silica solution obtained by removing part or all of an alkali of a water glass; (e) an injection liquid whose main material is a silica solution formed by mixing water glass, colloidal silica and a reactant; (f) suspension suspensions containing cement and / or viscosity as active ingredients; (g) Suspension infusion liquid containing slag and alkali as an active ingredient; (h) an injection liquid in which water glass aqueous solution and a polyvalent metal compound are injected into the ground individually from each injection liquid feeding system, (i) A ground injection method selected from the group of the injection liquid to be injected into the ground by transferring the water glass aqueous solution and the aqueous solution of the reactant into the respective injection liquid feed systems.