JP2017089162A - Chemical injection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical injection method capable of controlling injection pressure and an injection quantity of a chemical, by grasping a state with every injecting area.SOLUTION: A chemical injection method for injecting a chemical with every predetermined area by inserting an injection device (2) into a boring hole (1), by excavating the boring hole (1) of a predetermined passage (a locus) by a flexible excavation device, comprises a process of displaying as an image on the aboveground side by determining a passage of the boring hole (1), a process of displaying as the image on the aboveground side by determining a position of the injection device (2), a determination process of determining chemical injection pressure and/or a chemical injection quantity in an area for injecting the chemical and a chemical injection area display process of displaying the chemical-injected area as the image on the aboveground side, and the determination process determines the chemical injection pressure and/or the chemical injection quantity based on the image of the precedently chemical-injected area displayed in the chemical injection area display process and properties of soil of a construction site.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for excavating a boring hole and injecting a chemical into a peripheral region of the boring hole.

For example, in a chemical solution injection method using a flexible excavator (so-called “curved boring”), a boring hole of a predetermined path is excavated by curved boring. Thereafter, an injection device is inserted into the borehole to inject a chemical solution for each predetermined area.
In injecting the chemical liquid, for example, the chemical liquid injection device is inserted to the vicinity of the face tip of the boring hole to inject the chemical liquid, and then move to the ground side by a predetermined distance (drawn to the ground side). Hereinafter, the chemical solution injection device is repeatedly moved to the ground side by a predetermined distance and the chemical solution is injected. And a chemical | medical solution is inject | poured into the predetermined area | region along a boring hole.

Conventionally, in order to grasp and manage the position of the area where the chemical solution is injected, the route excavated by a flexible drilling device is entered in advance on a (paper) drawing and moved before the injection of the chemical solution. Determine the chemical injection location from the amount (for example, the amount to draw the chemical injection device to the ground side), determine the area where the chemical was injected from the discharge pressure of the chemical supply machine (pump) on the ground side, and A) on the drawing.
And the chemical injection amount in each chemical injection site was made constant.

However, for example, as shown in FIG. 4, when the gap DC (region where no chemical solution is injected) between the regions D21 and D22 into which the chemical solution is injected is relatively large with respect to the same boring hole CL1, it is appropriate for the gap DC. It is difficult to inject medicinal solution.
In the prior art in which the chemical solution injection region in the ground is drawn on a paper drawing, the chemical solution injection regions D21, D21, and DC are determined to be the same size, and the same amount of chemical solution is injected at the same injection pressure. . As a result, the region DC is injected as shown by a dotted line in FIG. 4, and the injection region becomes non-circular in cross section, and there is a problem that an inappropriate chemical solution injection region is generated. In FIG. 4, the area DCB represented by hatching will be described later in the column of the embodiment.
At the time of injecting the chemical solution, the chemical solution is injected so that adjacent chemical solution injection regions partially overlap, so that a region where no chemical solution is injected does not occur. However, in FIG. 4 to FIG. 7, the chemical solution injection regions are shown in a manner that does not overlap for simplification of illustration.

In the prior art that does not image the chemical injection region, for example, as shown in FIG. 5, when a non-circular chemical injection region DC (see region DC in FIG. 4) exists in the region along the bore hole CL1, When injecting the chemical solution along the bore hole CL2 to be performed, it is difficult to inject the chemical solution at the same pressure and in the same amount as the regions E2 and E3 into which the chemical solution has been previously injected in the region near the region DC. There was a problem (in FIG. 5, areas having the same size as the areas E2 and E3 are indicated by dotted lines EC).
If the same pressure and the same amount of chemicals as the regions E2 and E3 are forcibly injected into the region EC indicated by the dotted line, the chemicals are injected along a boring hole (not shown) adjacent to the boring hole CL2. It becomes even more difficult to do.
Note that the areas ECB1 to ECB3 indicated by hatching in FIG. 5 will be described later in the column of the embodiment.

Furthermore, as shown in FIG. 6, in the case of injecting the chemical solution along the boring hole CL3 that is curved so as to be separated from the adjacent boring hole CL2, the regions F7 to F7 that are separated from the boring hole CL2 If the same pressure and the same amount of chemical liquid as the previously injected areas F5 and F6 are injected into F9, there is a problem that a large area where no chemical liquid is injected is generated. If a large area where the chemical solution is not injected is generated, the necessary strength required for the entire ground cannot be obtained, which adversely affects various constructions performed thereafter.
In FIG. 6, regions F7 to F9 when the same pressure and the same amount of chemical solution as the regions F5 and F6 are injected are indicated by dotted lines. The hatched regions F7B and F8B in FIG. 6 will be described later in the column of the embodiment.

In addition, as shown in FIG. 7, when there is a boring hole CL3 that is curved so as to be separated from the adjacent boring hole CL2, the boring hole CL3 is set close to the boring hole CL4. It is curved.
In FIG. 7, in the boring hole CL4, in the regions G6 to G8 adjacent to the region where the boring hole CL3 is curved, an attempt is made to inject the same pressure and the same amount of chemicals as the previously injected regions G4 and G5. Then (regions having the same size as the regions G4 and G5 are indicated by dotted lines G6 to G8), since there is a region injected along the adjacent boring hole CL3, injection becomes difficult.
In FIG. 7, regions G6B to G9B indicated by hatching will be described later in the column of the embodiment.

With respect to the problems described with reference to FIGS. 4 to 7, the management method in which the locus of the boring hole is entered in advance on a conventional paper drawing cannot recognize even the problem, It is difficult to deal with.
In order to cope with the problems as shown in FIGS. 4 to 7, it is desirable to grasp the state of each region to be injected and control the injection pressure and the injection amount of the chemical solution.
However, in the conventional chemical solution injection method, a technique for grasping the state of each injection region and controlling the injection pressure and the injection amount of the chemical solution has not been proposed.
Moreover, not only when using the flexible excavation apparatus illustrated in FIGS. 4 to 7 (so-called “curved boring”), but also with a normal excavation apparatus having no flexibility (for example, Even when excavating an inclined boring (an inclined boring), it is desired to grasp the state of each injection region and control the injection pressure and the injection amount of the chemical. .

JP 2014-84555 A

  The present invention has been proposed in view of the above-described problems of the prior art, and provides a chemical injection method capable of grasping the state of each injection region and controlling the injection pressure and the injection amount of the chemical. It is an object.

In the method of injecting a solid solution of the present invention, a boring hole (1) of a predetermined path (trajectory) is excavated by, for example, a flexible excavating device (so-called “curved boring”), and the boring hole ( 1) In a chemical injection method for inserting a chemical into every predetermined area by inserting an injection device (2) into the inside,
Determining the path (trajectory) of the borehole (1) and displaying it as an image on the ground side;
Determining the position of the chemical injection device (2) and displaying it on the ground side as an image;
A determination step of determining a chemical injection pressure and / or a chemical injection amount in a region where the chemical is injected;
A chemical solution injection region display step of displaying the region (R) into which the chemical solution is injected as an image on the ground side,
In the determining step, the chemical injection pressure and / or the chemical injection amount based on the image of the region (R) in which the chemical solution was previously injected displayed in the chemical injection region display step and the property of the soil at the construction site. It is characterized by determining.

In the present invention, when the location where the chemical solution is to be injected is close to the region (R) into which the chemical solution is injected prior to the adjacent region, the chemical solution injection pressure is set to a low pressure and / or It is preferable to reduce the injection amount of the chemical solution.
Alternatively, in the present invention, when the location where the chemical solution is to be injected is separated from the region (R) into which the chemical solution is injected prior to the adjacent region, the chemical injection pressure is increased and / or Alternatively, it is preferable to increase the injection amount of the chemical solution.

When carrying out the chemical injection method for the underground consolidated body of the present invention, in the step of drilling the boring hole (1) of a predetermined path (trajectory), a flexible drilling device (so-called “curved boring”) is used. It is preferable to use it.

According to the present invention having the above-described configuration, when determining the injection pressure and the injection amount for injecting the chemical solution, the boring hole (1) to be subjected to the injection method, the position of the tip of the injection device (2), and the chemical solution are It is possible for the installer to recognize the situation in the injected region (R) as an image.
Therefore, according to the present invention, the injection pressure and the injection amount are not the same for all regions into which the chemical solution is injected, and the position of the region where the chemical solution is to be injected, the situation around the region, particularly the chemical solution is injected in advance. In consideration of the state of the region (R) thus formed, the injection pressure and the injection amount can be controlled appropriately.

For example, for the same boring hole (1), when the gap (DC: area where no chemical solution is injected) in the region (D21, D22) into which the chemical solution is injected is small (see FIG. 4), the gap (DC) It is difficult to inject chemicals.
On the other hand, in the present invention, it is possible to visually inspect the region and the gaps (D21, D22, DC) with an image (in the gap DC) and perform the chemical liquid injection. The pressure can be lower than that of D21 and D22) and / or the amount of the chemical solution injected can be reduced compared to the preceding region (D21 and D22) (region DCB). As a result, it is possible to prevent the non-uniform injection region from being generated by forcibly injecting the same amount and the same amount of the chemical solution as the preceding region (D21, D22) into the gap (DC).

Moreover, the same pressure and the same amount of the chemical solution as the preceding region (D21, D22) are forcibly injected into the gap (DC) (as shown in FIG. 5) to generate a non-uniform injection region (DC). In the boring hole (CL2) adjacent to the boring hole (CL1) where the non-uniform injection region (DC) exists, the region (EC) near the non-uniform injection region (DC) precedes. It is difficult to inject the same pressure and the same amount of the chemical solution as the regions (E2, E3) into which the chemical solution has been injected.
According to the present invention, even when there is a non-uniform injection region (DC), the builder can instantly grasp that the vicinity region (EC) is difficult to inject, so that the vicinity This can be dealt with by reducing the injection pressure in the region (EC) and / or reducing the injection amount of the chemical solution (regions ECB1 to ECB3).

Furthermore, in the case of injecting a chemical solution along a boring hole (CL3) curved so as to be separated from an adjacent boring hole (CL2) (as shown in FIG. 6), in the present invention, all the boring holes (CL1) Since it is possible to image the region into which the chemical solution has been injected along the CL3), the builder has to advance the region (F7, F8, F9) separated from the adjacent boring hole (CL2). It is possible to instantly grasp visually that an injection pressure higher than that of the injected region (F5, F6) and / or a large amount of chemical solution must be injected.
Therefore, a large injection pressure and / or a large amount of injection chemical solution is injected into a region separated from the adjacent boring hole (CL2) (region F7B, F8B) to generate a large region where the chemical solution is not injected. Can be prevented.

In addition, when the adjacent boring hole (CL3) is curved (as shown in FIG. 7) and approaches the adjacent boring hole (CL4), the curved boring hole (CL3) In the adjacent areas (G6 to G8), it is difficult to inject the same pressure and the same amount of the chemical solution as the previously injected area.
On the other hand, in the present invention, the adjacent boring holes (CL3) are curved so as to approach each other, and the regions (G6 to G8) adjacent to the curved boring holes (CL3) are difficult to be injected. The installer can make a visual judgment instantly. Therefore, the region (G6 to G8) can be dealt with by reducing the injection pressure and / or the amount of chemical solution injected compared to the regions (G4 and G5) injected in advance (regions G6B to G6). G9B).

It is a block diagram which shows embodiment of this invention. It is a functional block diagram of a control device used in an embodiment. It is a flowchart which shows the control in embodiment. It is explanatory drawing which shows the one aspect | mode in chemical | medical solution injection | pouring. FIG. 5 is an explanatory diagram showing a mode different from the mode shown in FIG. FIG. 6 is an explanatory diagram showing an aspect of chemical liquid injection, which is different from the aspects shown in FIGS. 4 and 5. FIG. 7 is an explanatory view showing a mode different from the modes shown in FIGS.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
In the illustrated embodiment, a method of excavating a boring hole 1 using a flexible excavating device (constructing so-called “curved boring”) and injecting a chemical into the peripheral area of the boring hole 1 will be described. Yes. However, the illustrated embodiment can also be applied to a case where a straight boring hole is excavated with a normal excavator without using a flexible excavator.
In the embodiment, the osmotic injection method is assumed as the chemical solution injection method, but the illustrated embodiment can be applied to the split injection.

In the state shown in FIG. 1, the excavation of the boring hole 1 and the measurement of the path (trajectory) of the boring hole 1 are finished, and the chemical solution is injected. In FIG. 1, a boring hole 1 is excavated to a predetermined position along a predetermined path (trajectory) by a flexible excavating apparatus (a so-called “curved boring” apparatus, not shown). Reference symbol A indicates the face side end portion of the boring hole 1.
When the boring hole 1 is cut to a predetermined location, the excavator is pulled out to the ground side by a predetermined distance. At that time, the measuring device (so-called “gyro”: not shown) provided at the tip of the excavator measures the direction and distance when pulling (pulling) to the ground side, and the data is the control unit on the ground side. It is transmitted to the CU (control device).
Then, until the flexible excavator is pulled out to the ground side, the distance and direction to be pulled out at every predetermined distance are measured, and the direction and distance at each predetermined distance are integrated, so that the control unit CU on the ground side The exact path (trajectory) of the borehole can be calculated.
Although not shown in the figure, excavation is repeated every time a predetermined distance (relatively short distance) during excavation, the extraction of the excavator, measurement of the amount and direction of extraction are repeated, and the data is accumulated by the control unit CU. At this time, it is also possible to determine whether or not a boring hole according to a predetermined route has been excavated.

After the flexible excavator is pulled out to the ground side, the chemical solution injector 2 is inserted into the borehole 1. When the injection device 2 reaches the tip A (the face side end) of the boring hole 1, the injection of the chemical solution is started.
After the chemical solution is injected into the peripheral region R by the injection device 2, the injection device 2 is moved to the ground side by the withdrawal amount δL (the injection device 2 is pulled to the ground side), and is moved to the ground side by the withdrawal amount δL. The chemical solution is again injected (arrow I).
Thereafter, the injection device 2 is repeatedly moved to the ground side and the chemical solution is injected, and the chemical solution is injected into a predetermined region of the boring hole 1.

The injection device 2 is inserted into the borehole 1 by the ground side injection tube supply device 3 or pulled out to the ground side. The injecting chemical solution is supplied from the ground-side chemical supply device 5 to the injecting device 2 through the injecting tube 2A.
The injection pressure and the injection time (or injection amount) for injecting the chemical solution can be controlled and adjusted by the pump 4 on the ground side.

The exact path (trajectory) of the boring hole 1 in which the injection device 2 is inserted measures the direction (drawn to the ground side) by a measurement device (so-called “gyro”) at every predetermined distance, and the injection tube supply device 3 Can be calculated by measuring the distance drawn to the ground side and integrating the measurement results.
Then, the area R into which the chemical solution is injected is connected to the control unit CU by calculating the soil properties, the injection pressure, and the injection time (or the injection amount) obtained in advance as parameters. It can be displayed on the device 4 as an image.
That is, the control unit CU and the display device 6 can display, as an image, the boring hole 1 where the injection method is to be performed, the position of the tip of the injection device 2, and the region R into which the chemical solution has been injected.

In the illustrated embodiment, information on the injection pressure and the injection amount (or injection time) of the chemical solution is transmitted from the chemical solution injection pump 4 to the control unit CU via the input signal line IL1, and the injection device 2 is supplied from the injection tube supply device 3. Of the amount of extraction (the amount of extraction L of the injection tube 2A) is transmitted to the control unit CU via the input signal line IL2.
The image data of the region R into which the calculated chemical solution has been injected is transmitted from the control unit CU to the display device 6 through the output signal line OL1.
The soil properties in the construction area acquired in advance are input from the input device 7 (operation panel) to the control unit CU via the input signal line IL3 prior to the injection of the chemical solution.

In FIG. 1, reference numeral 8 indicates a level. The level 8 detects the elevation and subsidence of the ground surface in the region where the injection method is applied by measuring the vertical fluctuation of the target object 9, and the input signal line. It has a function of transmitting to the control unit CU by IL4. The control unit CU determines whether the surface of the construction area is raised or subtracted based on the measurement result of level 8, and sends an operation command (for example, a command to stop the injection of the chemical solution) to the pump 4 through the output signal line OL2. .
The exact path (trajectory) of the boring hole 1 in which the injection device 2 is inserted is determined by calculating the measurement result by the measurement device (so-called “gyro”) by the control unit CU as described above. It is stored as data in the CU.
Although not clearly shown in FIG. 1, a plurality of boring holes 1 are cut in a vertical direction (depth direction) and / or a horizontal direction, and an injection device 2 is inserted into each of the plurality of boring holes 1 to inject a chemical solution. Is done.

Next, the control unit CU will be described mainly with reference to FIG.
In FIG. 2, the control unit CU has a borehole route determination block B1, an injection position determination block B2, an injection region determination block B3, an image creation block B4, a stop signal generation block B5, and a storage block B6 (all of which are functional blocks). doing.

The borehole route determination block B1 acquires measurement data (data in the moving direction) of the measuring device 10 (so-called “gyro”) provided at the tip of the excavator through the input signal line IL5, and supplies the injection pipe It has a function of acquiring the amount of data drawn from the device 3 to the ground side by the input signal line IL2-2 and determining the route of the boring hole 1.
When determining the boring hole path, for each amount of drawing (predetermined amount) to the ground side by the injection tube supply device 3, the amount of drawing and the direction of drawing by the measuring device 10 (so-called “gyro”) are obtained. By accumulating the pull-out directions, an accurate path (trajectory) of the boring hole 1 is calculated and determined. The determined path (trajectory) of the boring hole 1 is displayed as an image by the display device 6. Although not shown, the excavation, the extraction of the excavator, the measurement of the extraction amount and the extraction direction are repeated at every predetermined distance (relatively short distance) during excavation, and the extraction amount at every predetermined distance (relatively short distance). It is also possible to determine whether or not a boring hole according to a predetermined route has been excavated during excavation by integrating the measurement data in the drawing direction.
Further, the borehole route determination block B1 also has a function of transmitting the determined route data of the borehole 1 to the injection position determination block B2 and the storage block B6.

The injection position determination block B2 includes the data of the route of the borehole 1 determined by the borehole route determination block B1 and the amount of extraction of the injection tube 2A transmitted from the injection tube supply device 3 through the input signal line IL2 (of the injection device 2). The amount of movement to the ground side) is obtained, and the position of the injection device 2, that is, the injection position of the chemical solution is determined.
When determining the injection position, the amount of the injection device 2 drawn to the ground side from the start of injection from the face side tip position of the bore hole 1 on the path (trajectory) of the bore hole 1 (of the injection device 2 at that time) You only need to slide to the ground side by the amount of movement from the face side tip. The determined injection position is displayed as an image on the display device 6.
The injection position determination block B2 also has a function of transmitting the determined injection position data to the injection region determination block B3.

The injection region determination block B3 is stored in the storage block B6, the data on the injection position determined in the injection position determination block B2, the control data (discharge pressure, discharge amount) of the chemical liquid injection pump 4 transmitted by the input signal line IL1. It has a function to determine the injection area based on the soil property data of the construction area and the injection record data in other boreholes.
In determining the injection region, the injection pressure and injection amount (or injection time) of the chemical solution are determined from the control data (discharge pressure and discharge amount) of the chemical solution injection pump 4, and the injection pressure and injection time (or injection amount) are determined. And the area | region (injection area | region) which the chemical | medical solution reached | attained centering | focusing on an injection | pouring position is calculated by calculating using the property of the soil of a construction area | region as a parameter. Furthermore, the chemical solution injection region can be determined with reference to various data (soil data, image data, etc .: stored in the storage block B6) when the chemical solution is injected before that.
The injection region determination block B3 also has a function of transmitting the determined injection region data to the image creation block B4.

The image creation block B4 has a function of acquiring the injection region data determined in the injection region determination block B3 and creating image data of the injection region. For image creation, conventionally known software or commercially available software can be used.
The image creation block B4 has a function of transmitting the created image data of the injection region to the display device 6 through the output signal line OL1.
The image creation block B4 has a function of transmitting the created image data of the injection region to the storage block B6 as performance data.

The display device 6 that has received the image data of the injection region from the image creation block B4 can display the region R into which the chemical solution has been injected as an image on the screen.
As a result, the display device 6 displays the chemical solution injection region R (see FIG. 1), the path (trajectory) of the boring hole 1, and the chemical solution injection position (position of the injection device 2) as images. The image of the chemical solution injection region R, the path (trajectory) of the boring hole 1, and the image of the chemical solution injection position (position of the injection device 2) are referred to when determining the chemical solution injection pressure and the injection amount in the subsequent routine.

The stop signal generation block B5 has a function of acquiring the measurement data of the elevation or subsidence amount of the ground surface of the construction area transmitted from the level 8 by the input signal line IL4, and determining the presence or absence of the elevation or subsidence of the area. doing.
When it is determined that the area has risen or sunk, it has a function of transmitting a stop signal to the chemical solution injection pump 4 via the output signal line OL2 in order to prevent further bulging and sinking. doing. At that time, the stop signal generation block B5 also has a function of transmitting a signal indicating that a stop signal has been transmitted to the chemical liquid injection pump 4 to the display device 6.

The chemical injection pump 4 has a function of stopping the operation immediately upon receiving the stop signal from the stop signal generation block B5. The operation stop is not limited to the case of automatic control, and it is determined from the data displayed on the display device 6 via the output signal line OL3 that an operator (not shown) has raised or lowered, It also includes the case where a stop signal is transmitted.
When the display device 6 receives a signal indicating that a stop signal has been transmitted from the stop signal generation block B5 to the chemical solution injection pump 4, the surface of the construction area has risen or subsidized, and therefore, the injection of the chemical solution has occurred. It has a function to display that it has been stopped.
When stopping the chemical injection pump 4, the stop signal generating block B 5 sends a signal indicating that the uplift or subsidence has occurred on the ground surface of the construction area, and when the signal is displayed on the display device 6, the installer However, the pump 4 can be manually stopped.

Memory block B6 is the soil properties of the construction area obtained by the survey before the construction of the filling method, the filling record data in other boreholes (various data obtained at the time of previous filling), the borehole route determination It has a function of storing the determination result of block B1 (path data of the borehole 1), creation data of the image creation block B4 (image data of the injection region), and the like. Data stored in the storage block B6 is transmitted to the various functional blocks described above as necessary.
Here, the properties of the soil and the data of the injection results in other boreholes can be obtained in advance or according to the progress of the construction by the installer or the data manager using the input device 7 (operation panel). Input to storage block 6.
Image data of the injection region created in the image creation block B4 is transmitted to the storage block B6, and the chemical solution injection region displayed as an image is changed (updated) in a predetermined control cycle. Therefore, the installer can make various decisions with reference to the latest image.

Next, mainly referring to FIG. 3, the procedure of the chemical solution injection operation will be described.
In FIG. 3, in step S <b> 1, the injection device 2 is inserted into a boring hole 1 excavated by a flexible excavating device (so-called “curved boring”). The injection device 2 is inserted until it reaches the tip A (the face side end) of the boring hole 1. Then, the process proceeds to step S2.

In step S2, the injection device 2 is pulled out by a predetermined amount by the injection tube supply device 3. Here, the drawing amount (drawing amount to the ground side) of the injection device 2 may be determined with reference to the image of the chemical solution injection region.
The withdrawal of the injection device 2 in step S2 is not performed at the time of the first chemical injection at the tip A (face end) of the boring hole 1, but the chemical injection at the tip A (face end) of the boring hole 1 is performed. (After the second injection in the bore 1).
In step S2, when the injection device 2 is pulled out by a predetermined amount, the position of the injection device 2, that is, the chemical solution is determined from the path (miracle) of the boring hole 1 and the extraction amount of the injection device 2 by the injection position determination block B2 (see FIG. 2). The injection position is determined.

In step S3, the injection pressure and the injection amount of the injection device 2 are determined.
When determining the injection pressure and injection volume, the operator recognizes the borehole 1 where the injection method should be applied, the position of the tip of the injection device 2 and the region R into which the chemical solution has been injected as an image, and conducts a preliminary survey. It is determined with reference to the soil properties of the construction area acquired by the above and the injection results in other boreholes.
Although not clearly shown in FIG. 3, prior to determining the injection pressure and the injection amount in step S3, a step of determining the path (trajectory) of the boring hole 1 and displaying it as an image on the display device 6, and chemical injection A step of determining the position of the device 2 and displaying it as an image on the display device 6 and a step of displaying the region R (see FIG. 1) into which the chemical solution has been injected as an image are executed.

In FIG. 4, when the chemical solution is injected along the boring hole CL1, it is difficult to inject the chemical solution into the gap DC (region where the chemical solution is not injected) between the regions D21 and D22 where the chemical solution is injected. If the chemical solution is injected with the same injection pressure and injection amount as the regions D21 and D22, an inappropriate chemical solution injection region is generated as in the region DC indicated by the dotted line in FIG.
On the other hand, in the illustrated embodiment, the operator (operator) can visually inspect the position and size of the regions D21 and D22 with an image and inject the chemical liquid in the gap DC. Therefore, the chemical injection pressure and / or The chemical solution injection amount can be reduced as compared with the regions D21 and D22, and the chemical solution can be injected only in the region DCB displayed in the hatched state in FIG. Thereby, the chemical solution is injected into the gap DC between the regions D21 and D22 as the chemical solution injection region DCB, and the generation of the region DC indicated by the dotted line in FIG. 4 can be prevented.

Further, as shown in FIG. 5, in a boring hole CL2 adjacent to the boring hole CL1 in which a non-circular inappropriate chemical solution injection region DC exists, in a region EC in the vicinity of the region DC, a region E2 into which the chemical solution has been previously injected. It is difficult to inject the same pressure and the same amount of chemical as E3.
On the other hand, in the illustrated embodiment, the region into which the chemical solution has been injected is imaged, so that the operator can instantly grasp visually that the region EC is a difficult injection region. As a result, for example, the hatched region ECB1 in which the chemical injection pressure in the region EC is set to a low pressure compared to the regions E2 and E3 and / or the chemical injection amount is decreased compared to the regions E2 and E3. It is possible to prevent a situation in which the chemical solution is injected into the ECB3 and the region EC has the same shape as the inappropriate region DC.

Further, as shown in FIG. 6, in the case of injecting the chemical solution along the bored hole CL3 curved so as to be separated from the adjacent bored hole CL2, in the regions F7 to F9 separated from the bored hole CL2, If the same pressure and the same amount of the chemical solution as the previously injected regions F5 and F6 are injected, the region where the chemical solution is not injected becomes large.
On the other hand, in the illustrated embodiment, if the region into which the chemical solution is injected along the boring holes CL1 to CL3 is imaged, the region where the contractor is injected in advance in regions such as regions F7, F8, and F9. It is possible to instantly grasp visually that an injection pressure greater than F5 and F6 and / or a large amount of chemical solution must be injected. As a result, in a region separated from the boring hole CL2, a large amount of chemical solution is injected with a large injection pressure as in regions F7B to F9B (however, only the chemical solution injection regions F7B and F8B are shown in FIG. 6). Therefore, it is possible to prevent the generation of a large area where no chemical solution is injected.

As shown in FIG. 7, when the boring hole CL3 is curved so as to be separated so as to be close to the adjacent boring hole CL4, the regions G4 to G6 where the boring holes are close are preceded. It is difficult to inject a chemical solution having the same pressure and the same amount as the injected regions G4 and G5.
According to the illustrated embodiment, regions G6 to G8 are regions G4 and G5 into which chemicals have been injected in advance by imaging the regions injected with chemicals along the bore holes CL1 to CL4 and comparing them as images. Compared to the above, the operator can instantly grasp visually that the injection pressure must be lowered and / or the chemical injection amount must be reduced. And the injection | pouring pressure of area | region G6-G8 can be lowered | hung and / or the amount of chemical | medical solution injection | pouring can be decreased, and a chemical | medical solution can be inject | poured appropriately like area | region G6B-G9B which attached the hatching of FIG.

As described above, the chemical injection pressure and / or the chemical injection amount are determined immediately before the chemical injection, and the discharge pressure and discharge amount of the chemical injection pump 4 are determined so as to control the determined injection pressure and injection amount. The
However, if the imaging speed and other various control speeds are fast and the state in which the chemical solution is injected can be imaged in the so-called “real time”, the adjacent chemical injection region and the region where the chemical solution is currently injected overlap. Until then, it is possible to inject the chemical solution and stop the chemical injection by stopping the chemical injection pump on the ground side at the overlapping moment.
However, in the illustrated embodiment, the pressure and / or injection determined after determining the chemical injection pressure and / or the chemical injection amount is not control when the state in which the chemical is injected in the so-called “real time” can be recognized as an image. The case where the chemical solution is injected in an amount is described.

If the chemical injection pressure and / or the chemical injection amount are determined in step S3, the process proceeds to step S4, and the discharge pressure and / or discharge amount of the chemical injection pump 4 is controlled according to the determined injection pressure and injection amount. Perform chemical injection.
Then, the process proceeds to step S5.

In step S <b> 5, an image of the injection solution injection region R is created and the created image is displayed on the display device 6.
The image of the injection region R is referred to when determining the injection pressure and / or the injection amount of the chemical liquid when injecting the chemical liquid in a subsequent process.

In the next step S6, it is determined whether or not a predetermined injection amount is injected at a predetermined injection pressure into a region (region R in FIG. 1) into which a chemical solution is currently injected. The determination is made, for example, by the operator confirming the discharge pressure / discharge amount of the chemical liquid injection pump 4.
In step S6, when a predetermined injection amount is injected at a predetermined injection pressure (when step S6 is “Yes”), the process proceeds to step S13, and when a predetermined injection amount is not injected at a predetermined injection pressure ( If step S6 is “No”, the process proceeds to step S7.

In step S7, it is determined whether or not the ground surface of the construction area of the injection method has been raised. Specifically, the stop signal generation block B5 (see FIG. 2) based on the measurement result of level 8 makes a determination, and the determination result is confirmed by, for example, the display device 6 by the installer.
In step S7, when the ground surface of the construction area is raised (step S7 is “Yes”), the process proceeds to step S8, and when the ground surface of the construction area is not raised (step S7 is “No”), the process proceeds to step S10.

In step S8 (when the ground surface of the construction area is raised), data (chemical solution injection pressure, chemical injection amount, injection position, chemical solution injection area image data, etc.) when the ground surface of the construction area is raised is stored in the control unit CU. Record in block B6 and proceed to step S9.
In step S9, a predetermined process is performed on the surface bulge of the construction area. Then, the chemical injection method is completed.

In step S10 (when the ground surface of the construction area does not rise), it is determined whether or not the ground surface of the area where the chemical solution injection method is constructed has subsided. For example, based on the measurement result of level 8, it is determined whether or not the ground surface has sunk by the stop signal generation block B5 of the control unit CU, the determination result is displayed on the display device 6, and the builder is displayed on the display device 6. Check.
Step S10 includes a case where an operator (not shown) determines that the uplift or the downfall has occurred from the data displayed on the display device 6 via the output signal line OL3.
If it is determined in step S10 that the ground surface of the construction area has sunk (step S10 is “Yes”), the process proceeds to step S11.

In step S11, upon receiving the judgment that the surface of the construction area has subsided, the data (chemical solution injection pressure, chemical solution injection amount, injection position, chemical solution injection region image data, etc.) at that time is recorded in the storage block B6 of the control unit CU. The process proceeds to step S12.
In step S12, the process when the ground surface of the construction area sinks is executed. And the chemical injection is stopped.
If the ground surface of the construction area does not sink in step S10 (step S10 is “No”), the process returns to step S4 and the chemical solution injection is continued.

In step S13 (when the chemical solution is injected by a predetermined injection amount in step S6), it is determined whether or not the injection in all the regions along the borehole 1 under construction has been completed. This determination can also be made by visually confirming the image of the region R into which the construction agent has been injected.
If it is determined in step S13 that chemical injection has been completed in all regions along the borehole 1 being constructed (step S13 is “Yes”), the process proceeds to step S14.
On the other hand, when it is determined that the chemical injection in all the regions along the bored hole 1 under construction has not been completed (step S13 is “No”), the process returns to step S2, and the chemicals in the region along the bored hole 1 are returned. Continue infusion.

Although not shown in FIG. 3, when the chemical solution is injected by a predetermined injection pressure at a predetermined injection pressure in Step S <b> 6 (when Step S <b> 6 is “Yes”), in the stage before proceeding to Step S <b> 13, For example, a step of determining whether the ground surface of the construction area is raised or the ground surface of the construction area is not sunk based on the measurement result of level 8, for example.
For example, when there is a cavity in the ground near the construction area, the surface does not rise or sink near the construction area during the injection of the chemical liquid in steps S4 to S6, but the chemical liquid is injected by a predetermined injection amount. This is because there are cases where the nearby ground surface rises or sinks later.
When such uplift and subsidence are measured, the data on the uplift and subsidence of the surface of the construction area (chemical solution injection pressure, chemical injection amount, injection position, chemical solution injection region image data, etc.) are obtained in the same manner as in steps S8 and S11. Recording is performed, a predetermined process is performed in the same manner as steps S9 and S12, and the chemical injection method is completed. In other words, in FIG. 3, when a chemical solution is injected by a predetermined injection pressure at a predetermined injection pressure in step S6 (step S6 is “Yes”), and no bulge or subsidence occurs on the ground surface near the construction area. The process proceeds to step S13.

In step S14 (when it is determined that chemical injection has been completed in all regions along the borehole 1 being constructed), it is determined whether or not chemical injection has been completed for all the boreholes 1. Even in that case, it is possible to visually confirm the image of the region R into which the construction agent has been injected.
If it is determined in step S14 that the injection has been completed for all of the boring holes 1 of the injection method (step S14 is “Yes”), the chemical solution injection method is ended. On the other hand, if it is determined in step S14 that the chemical liquid injection has not been completed for all the boring holes 1 (step S14 is “No”), the process proceeds to step S15.
In step S15, the injection device 2 is pulled out from the boring hole 1 and the process returns to step S1 to inject the chemical liquid through another boring hole where no chemical liquid is injected. Thereafter, steps S1 to S15 are repeated.

According to the illustrated embodiment, when determining the injection pressure and the injection amount for injecting the chemical solution, the route (trajectory) of the boring hole 1 where the injection method should be applied, the position of the tip of the injection device 2, and the chemical solution were injected. The installer can recognize the situation in the area as an image. Therefore, according to the illustrated embodiment, the position of the region where the chemical solution should be injected, the situation around the region, particularly in advance, without making the injection pressure and the injection amount the same for all the regions where the chemical solution is injected. In consideration of the state of the region into which the chemical solution is injected, it is possible to control the injection pressure and / or the injection amount appropriate for each chemical solution injection region.
Here, the injection pressure and the injection amount are determined immediately before the injection of the chemical solution, and the discharge pressure and discharge amount of the chemical injection pump 4 on the ground side can be controlled, so that the chemical injection is performed quickly and flexibly. I can do it.

In addition, according to the illustrated embodiment, based on the measurement result of level 8 installed on the ground side, it is detected that the ground surface of the construction area of the injection method is raised or subsidized, and the construction is performed. When it is detected that the surface of the region is raised or subsidized, the chemical solution injection is stopped. Therefore, when the ground surface of the enforcement area rises or sinks against the result of the preliminary construction area survey, it can be detected with certainty and dealt with promptly.

It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention.
For example, in the illustrated embodiment, a flexible excavator (so-called “curved boring”) is used, but linearly using an ordinary excavator (for example, a direction inclined with respect to a straight direction: so-called The present invention can also be applied to the case of drilling a borehole in the “oblique direction”).
In the illustrated embodiment, the chemical solution is injected by osmotic injection, but the present invention can also be applied to the case where the chemical solution is injected by split injection.

DESCRIPTION OF SYMBOLS 1 ... Boring hole 2 ... Chemical solution injection device 3 ... Injection pipe supply device 4 ... Chemical solution injection pump 5 ... Chemical solution supply device 6 ... Display device 7 ... Input device (operation Board)
8 ... Level 9 ... Target object 10 ... Measuring device (gyro)
B1 ... Boring hole path determination block B2 ... Injection position determination block B3 ... Injection region determination block B4 ... Image creation block B5 ... Stop signal generation block B6 ... Storage block CU ... Control unit IL1, IL2, IL3, IL4, IL5... Input signal line OL1, OL2... Output signal line

Claims (4)

In the chemical solution injection method of drilling a borehole of a predetermined path, inserting an injection device into the borehole, and injecting a chemical solution for each predetermined area,
Determining the path of the borehole and displaying it as an image on the ground side;
Determining the position of the chemical injection device and displaying it as an image on the ground side;
A determination step of determining a chemical injection pressure and / or a chemical injection amount in a region where the chemical is injected;
Having a chemical injection region display step of displaying the region into which the chemical has been injected as an image on the ground side,
In the determining step, the chemical solution injection pressure and / or the chemical solution injection amount are determined based on the image of the region where the chemical solution is previously injected and displayed in the chemical solution injection region display step and the property of the soil at the construction site. A chemical solution injection method for underground solid bodies.   When the location where the chemical solution is to be injected is close to the region into which the chemical solution has been injected prior to the adjacent region, the chemical injection pressure is reduced and / or the chemical injection amount is decreased. The chemical solution injection method for the underground consolidated body according to claim 1.   When the place where the chemical solution is to be injected is separated from the region where the chemical solution is injected prior to the adjacent region, the chemical injection pressure is increased and / or the chemical injection amount is increased. The chemical | medical solution injection | pouring method of the underground solid body in any one of Claims 1,2. The chemical injection method for underground solid body according to any one of claims 1 to 3, wherein a flexible excavator is used in a step of excavating a borehole of a predetermined path.

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