KR101831688B1 - Grouting injection pressure control device - Google Patents

Abstract

The present invention relates to a grouting underground injection pressure integrated control device which can measure the discharge pressure of a grout in the ground and adjust the injection pressure of the ground according to a change of the discharge pressure so as to inject a more precise and active grout. In addition, by using a sensor module including an observer sensor and a pressure sensor installed around a packer when installing the grout by installation of an observer casing, the automatic valve pressure in a ground grouting system can be adjusted by remotely sending a signal when the grout is discharged from a construction range. Moreover, construction costs, processing costs, and a construction period can be reduced by reduction of detection time and a quick response with a location where an unexpected situation occurs during injection of the grout.

Description

[0001] Grouting injection pressure control device [

The present invention relates to a grouting underground infusion pressure integrated control apparatus, and more particularly, to a grouting underground infusion pressure integrated control apparatus which simultaneously measures a grout discharge pressure and a grout infusion pressure from the ground during a grouting method, And more particularly, to a grouting underground injection pressure integrated control device capable of precise control and more precise construction of a grouting method which does not damage a structure.

The grouning method is used for various cement, mortar and chemical materials such as cementation of the ground, increase of the bearing capacity of the ground, reduction of permeability, integration of the ground and the structure, Injection. The material used in the grouting method and injected into the ground is called a grout. This grouting method is performed on the ground where the structure is built before the structure is built, but it is also applied to the aged structure to complement the rigidity of the structure.

Recently, there has been frequent heavy rain due to abnormal weather phenomenon due to climate change, and the collapse of the aged reservoir fill dam has occurred. These aged fill dams need reinforcement because they can cause collapse of fill dams when water disasters accompanied by extreme rainfall occur. Therefore, it is possible to compensate the stiffness of the aged fill dam through the above-mentioned grouting method. When the grout is injected at a high pressure due to the weakened stiffness of the aged fill dam itself, splitting (cleavage) occurs inside the aged fill dam, May be reduced. Conventionally, in order to solve this problem, a user has used a method of controlling the injection amount and injection pressure of the grout while confirming the injection pressure of the grouting injection device on the ground. For such a configuration, Korean Patent No. 10-1224195 (" System ", published on January 21, 2013).

Prior Art 1 can measure the injection pressure of the grout and thereby adjust the injection pressure by adjusting the injection amount of the grout, but the injection pressure of the grout measured in the prior art 1 is a method of measuring on the ground. In this method, the pulsation generated when the grout is mixed and sent to the ground must be measured together with the grouting pressure, and the grouting pressure measured at the ground and the portion where the grouting is actually discharged, There is a problem that it is difficult to precisely control the discharge pressure.

1. Korean Registered Patent No. 10-1224195 (published on January 21, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to measure the discharge pressure of the grout in the ground and to control the injection pressure of the ground according to the change of the discharge pressure, And an object thereof is to provide a grouting underground injection pressure integrated control device capable of being operated.

In addition, when the grout is leaked out of the construction range by using the sensor module including the observer sensor and the pressure sensor installed around the packer when installing the obturator casing by installing the observer casing, And it is an object of the present invention to provide an integrated control device capable of reducing a construction cost, a processing cost, and a construction period by shortening a discovery time and promptly coping with a location where an unexpected situation occurs during injection of a grout .

According to another aspect of the present invention, there is provided an integrated control apparatus for grouting underground injection pressure, comprising: a grout injection pipe for receiving grout from a supply unit and discharging the grout to a ground; A control unit connected to the grouting packer unit to measure and control the injection pressure and the injection amount of the grout; a flow control unit installed at a predetermined interval from the grouting packer unit to monitor the flow status of the grout injected from the grouting packer unit; A plurality of observer casings for grasping a movement path; And a control unit.

The control unit receives the measured information from the grouting packer device and regulates the injection pressure of the grout by controlling the flow rate of the grout supplied from the supply unit to the grouting packer device according to the discharge pressure.

The control unit may include a second pressure sensor installed in the grout injection pipe and measuring an injection pressure of the grout injected from the supply unit, a flow meter installed in the grout injection pipe and measuring a flow rate of the grout injected through the grout injection pipe, A flow control unit for controlling the flow rate of the grout according to the discharge pressure of the grout transferred from the grouting packer device, a multi-channel pressure receiving module for receiving information on the flow status of the grout provided in a plurality of channels from the observer casing, And a control unit.

In addition, the flow control unit may include an injection pipe to which the grout is injected, an injection pipe to which the injection valve is installed, a return pipe installed corresponding to the injection pipe to move the grout returned by the injection valve back to the supply unit, Wherein the flow rate is adjusted by a method in which the injection valve and the return valve are relatively locked or unlocked.

The observer casing is installed at both side edges of the fill dam, and at least two observer casings are installed at predetermined intervals from the grouting packer device.

The observer casing is embedded in the ground and includes a plurality of observer sensors for sensing the pressure generated by the flow of the grout, measuring and sensing the flow state of the grout sensed by the observer sensor and the flow pressure, And a sensor box for transmitting the information to the control unit.

Further, the sensor box measures and senses the flow state and the flow pressure by the grout flowing through the pressure sensor installed at predetermined intervals in the sensor line extending from the sensor box, .

Since the grouting underground injection pressure integrated control apparatus according to the present invention measures the pressure (discharge pressure) of the grout discharged from the ground and adjusts the grout injection pressure and the injection amount in the control unit located on the ground with the feedback signal, It is possible to minimize the damage of the object even if the rigidity is weakened due to the aging of the object of the public method, and it is possible to inject the grout at extremely low speed and extremely low pressure, thereby minimizing damage to the grout injection object .

In addition, when the grout flows out of the operation range by the observer casing, a signal is transmitted to control the automatic valve pressure at the integrated control device to prevent leakage to surrounding agricultural land and reservoir, thereby preventing water quality and environmental damage. It is possible to shorten the discovery time and quickly cope with the current state of the flow and the occurrence position of the unexpected situation, thereby reducing the construction cost, processing cost and construction period.

1 is a schematic view of a grouting underground injection pressure integrated control device according to the present invention;
Fig. 2 is an enlarged view of the grouting packer device of Fig.
Fig. 3 is an exploded view of the pressure sensor unit of Fig.
4 is a side schematic view of a control unit according to the present invention;
5 is a top schematic view of a control part according to the present invention;
FIG. 6 is a diagram illustrating a sub-menu screen of a terminal for outputting data of a controller according to the present invention.
Figure 7 is a schematic view of the present invention using a terminal;
8 is a diagram illustrating a main menu screen

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention.

The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Since the grouting underground injection pressure integrated control apparatus according to the present invention measures the pressure (discharge pressure) of the grout discharged from the ground and adjusts the grout injection pressure and the injection amount in the control unit located on the ground with the feedback signal, The damage of the object can be minimized even if the rigidity of the object is degraded due to the aging of the object of construction, and it is possible to inject the grout at extremely low speed and extremely low pressure, thereby minimizing damage to the grout injection object.

In addition, when the grout flows out of the operation range by the observer casing, a signal is transmitted to control the automatic valve pressure at the integrated control device to prevent leakage to surrounding agricultural land and reservoir, thereby preventing water quality and environmental damage. It is possible to shorten the discovery time and quickly cope with the flow situation and the occurrence position of the unexpected situation, thereby reducing the construction cost, the processing cost and the construction period.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a grouting underground injection pressure integrated control apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. Hereinafter, the description of the conventional matters will be omitted or simplified in order to clarify the gist of the present invention.

1 is a schematic view of a grouting underground injection pressure integrated control apparatus according to the present invention. Figure 2 is an enlarged view of the grouting packer device of Figure 1; 3 is an exploded view of the pressure sensor unit of Fig. 4 is a side schematic view of a control unit according to the present invention. 5 is an upper schematic view of a control unit according to the present invention. FIG. 6 is a submenu screen of the terminal for outputting data of the control unit according to the present invention. 7 is a schematic diagram of the present invention using a terminal. 8 is a main menu screen of the terminal for outputting data of the control unit according to the present invention.

1 and 8, the grouting underground injection pressure integrated control apparatus 1 may include a grouting packer apparatus 100, a control unit 200, a supply unit 300, and an observer casing 400.

The grouting packer device 100 is inserted into the ground to inject the grout into the ground, and it is possible to measure the discharge pressure, which is the pressure of the grout discharged from the ground. The grouting packer device 100 may include a grout injection pipe 110, a first packer member 120, a pressure sensor unit 130, a second packer member 140 and a packer unit 150.

The grout injection pipe 110 is for injecting the grout into the interior of the reinforcing structure (hereinafter referred to as a fill dam). The grout injection pipe 110 may be installed to be inserted into the fill dam along the perforation hole formed in the fill dam for maintenance and reinforcement from the ground. The grout injection pipe 110 may be formed by injecting grout through the grout injection pipe 110, As shown in FIG.

The first packer member 120 is a disc-shaped member having a predetermined thickness, and may have a hollow at its center. The inner circumferential surface of the first packer member 120 is tightly coupled to the grout injection tube 110 and the outer circumferential surface thereof is brought into close contact with the ground within the perforation hole so that the grouting packer apparatus 100 is not shaken.

When the actual injection pressure of the grout is measured on the ground, the pressure sensor unit 130 can not accurately reflect the pressure when the actual grout is discharged because the accuracy is lowered by the external force. In particular, when the injection tube is extended downward, the pressure at the ground and the pressure at the bottom may be significantly different. Accordingly, the first pressure sensor 132 can be installed in the ground to measure the injection pressure with high accuracy. The pressure sensor unit 130 may include a connection pipe 131, a first pressure sensor 132, and a communication line 133.

The pressure sensor unit 130 may be installed on the side of the grout injection pipe 110 at the upper part of the first packer member 120 and may be installed at the inner side of the outer diameter of the first packer member 120, It is possible to prevent abrasion and breakage of the grouting packer device 100 by the outer peripheral surface of the first packer member 120 when the grouting packer device 100 is removed from the perforation hole.

The connection pipe 131 may be formed in a hollow shape branched from the grout injection pipe 110 and may communicate with the grout injection pipe 110. The first pressure sensor 132 may be coupled to the end of the connection pipe 131. The length of the protruding portion of the coupling pipe 131 may be between the inner circumferential surface and the outer circumferential surface of the first packer member 120. That is, it may be a distance between the outer circumferential surface of the grout injection tube 110 and the first packer member 120, and preferably does not deviate from the outer circumferential surface of the first packer member 120.

When the grout is injected into the grout injection pipe 110, a part of the grout can be continuously moved into the connection pipe 131.

The first pressure sensor 132 is provided on the side surface of the grout injection pipe 110 and can measure the injection pressure injected into the ground through the grout injection pipe 110.

The communication line 133 may be connected to the first pressure sensor 132 and may be connected to the ground control unit 200 by wire. The communication line 200 may provide information on the injection pressure value measured by the first pressure sensor 132 to the control unit 200. The control unit 200 may control the injection pressure to adjust the injection amount of the grout, Can be controlled.

The reason why the first pressure sensor 132 and the control unit 200 are connected through the communication line 133 of the wired type is that the portion where the first pressure sensor 132 is located is the ground, ). ≪ / RTI >

However, the communication line 133, which is connected to the first pressure sensor 132 on one side, may be connected to the ground, and the bus line module may be mounted on the other end located on the ground. Thus, the communication line 133 is not exposed to the ground, The communication line 133 can be removed and connected to the control unit 200 simply and economically.

That is, when the grout is injected into the grout injection pipe 110, a part of the grout is continuously moved into the connection pipe 131 to apply pressure to the first pressure sensor 132. At this time, (Discharge pressure) to an electrical signal and provide the measured information through the communication line 133 connected to the first pressure sensor 132 to the controller 200. [

When the pressure sensor unit 130 is coupled in the direction perpendicular to the direction in which the grouting packer apparatus 100 extends, it may not be easy for the grouting packer apparatus 100 to be inserted into the perforation hole. 3, the connection pipe 131 is bent in a direction parallel to the grout injection pipe 110, and the first pressure sensor 132 is connected to the connection pipe (not shown) The width of the grouting packer device 100 can be minimized by being connected to the end of the grouting pipe 110 in parallel with the grouting pipe 110. This allows the grouting packer device 100 including the pressure sensor part 130 to be more easily So that it can be inserted into the perforation hole.

As shown in FIG. 3, threads are formed on the inner circumferential surface of the end portion of the connection pipe 131, and corresponding threads are formed on the lower end of the first pressure sensor 132, so that they can be screwed to each other. The screw connection is an embodiment of a coupling method of the coupling pipe 131 and the first pressure sensor 132. The coupling pipe 131 and the first pressure sensor 132 are coupled to each other through another method such as fitting .

In addition, the measured pressure value is provided to the control unit 200 in real time, so that the control unit 200 can precisely control the excess or shortage of the injection pressure in real time. In the control unit 200, a predetermined pressure range is inputted by the user, so that the pressure can be actively controlled without manually adjusting the pressure.

In the past, it was done by using an analog pressure gauge on the ground to read by the user and manually adjust the injection pressure. There is a problem in that it is difficult for the operator to continuously check the pressure condition, and also it is difficult to cope with the instantaneous changing pressure. When the grout injection pressure rises, the fillet dam may be damaged due to the splitting injection momentarily inside the fill dam. Particularly, in the conventional method of manually controlling the pressure, it takes more time to cope with the pressure change.

Above all, the pressure measured on the ground can not accurately reflect the pressure when the grout is actually discharged.

However, in the present invention, in the grouting packer apparatus 100, the pressure sensor unit 130 accurately reflects the discharge pressure of the actual grout, and this value is not only provided to the control unit 200 in real time, Actively adjust the pressure to the pressure range. Accordingly, not only the injection pressure of the grout can be precisely controlled, but real-time active control can be performed, and the injection pressure exceeding the normal range can be immediately coped with.

Advantages of the present invention will be described in more detail.

When the grout is injected underground, there is a difference between the injection pressure measured on the ground and the actual injection pressure in the underground. The important problem is that the pressure on the ground is lower than the actual discharge pressure underground. The pressure in the underground becomes higher, so that a ripple injection situation may occur. However, since the pressure of the pressure gauge installed on the ground is in the normal pressure range, the injection pressure can not be lowered, so that the damage of the fill dam body due to the above-mentioned ripple injection can be accelerated. Therefore, it is very important to accurately measure the actual injection pressure in the basement as in the present invention.

Also, the problem with measuring the pressure on the ground is the pulsation of the pump. The pressure gauge on the ground is arranged close to the pump. Since the pump is pulsated when a force is applied to the grout, the pressure measured on the ground as shown in W1 in FIG. 8 is largely fluctuated up and down to reflect the pulsation. Therefore, when manually adjusting the pressure, the reference is unclear and the pressure control can not be smoothly performed. However, in the case where the pressure sensor is disposed in the basement away from the pump as in the present invention, the pulsation phenomenon is alleviated and the pressure value is constantly measured without any large deviation as shown by W2 in FIG. Because there is no pulsation, the pressure reference becomes clear and pressure control becomes easy.

The second packer member 140 is a disc-shaped member having a predetermined thickness, such as the first packer member 120, and may have a hollow center. In addition, the grout injection pipe 110 may be spaced apart from the first packer member 120 by a predetermined distance. The second packer member 140 is closely coupled to the grout injection pipe 110 such that the inner circumferential surface of the second packer member 120 is closely contacted with the ground in the perforation hole so that the grouting packer device 100 is not shaken And it is possible to prevent the injected grout from flowing back to the ground.

The packer unit 150 may be installed to surround the grout injection pipe 110 between the first and second packer members 120 and 140. The packer portion 150 may be made of an elastic material capable of expanding and contracting, for example, a rubber material.

When the fluid and the gas are injected into the sealed space of the packer unit 150, the rubber packer expands and comes in close contact with the perforation hole to be more stable than the first packer member 120 and the second packer member 140 It can be fixed tightly. In addition, when the fluid is discharged, the packer unit 150 can be retracted and restored to its original state. The fluid and the gas may be connected to the packer portion 150 along the perforation hole from the ground using a separate supply pipe (not shown).

The control unit 200 is connected to the grouting packer device 100 to adjust the flow rate of the grout supplied to the grouting packer device 100 and the grout pressure according to the discharge pressure provided by the pressure sensor unit 130, Pressure and flow rate can be measured and controlled.

In addition, the control unit 200 can sense the flow state of the grout according to the information provided in the observer casing 400, and when an abrupt change in the injection pressure occurs while checking the flow state, The injection can be stopped. Accordingly, it is possible to shorten the time to find a place where an unexpected situation has occurred in the flow status detected by the observer casing 400.

4 and 5 illustrate a detailed configuration of the control unit 200. The control unit 200 includes a second pressure sensor 210, a flow meter 220, a flow rate controller 230, ).

The second pressure sensor 210 is installed in the grout injection pipe 110 to measure the grout injection pressure on the ground. In general, the injection pressure is different from the discharge pressure depending on the environment and the design of the underground. Since the difference between the injection pressure and the discharge pressure depends on the construction work and the design of the equipment, the injection pressure is measured every time the operation is performed, and the discharge pressure can be adjusted by using the injection pressure.

The flow meter 220 is installed in the grout injection pipe 110 to measure the flow rate of the grout. Normally, before the grouting method is performed, there is a preparing step such as the ground exploration, and the amount of grouting is determined. The flowmeter measures whether the grout is injected by the predetermined amount of grout injection and whether the grout is injected quantitatively according to the progress of the process.

The flow rate regulator 230 regulates the injection amount of the grout, and may be a kind of valve. The flow rate regulator 230 can regulate the discharge pressure by adjusting the injection pressure of the grout. 5 shows a schematic top view of the control unit 200 for explaining a method of controlling the amount of grout injected by the flow rate regulator 230. The flow rate regulator 230 includes an injection valve 231 and a return valve 232 ).

First, the grout supplied from the supply unit 300 through the grout supply pipe 30 is distributed through the injection pipe 10 and the return pipe 20 as shown in FIG. The injection pipe (10) and the return pipe (20) are provided with an injection valve (231) and a return valve (232), respectively, so as to control the flow rate of the grout discharged through the injection valve (231) and the return valve (232).

When the flow rate of the grout passing through the injection pipe 10 is increased, the injection pressure is increased. When the flow rate of the grout is decreased, the injection pressure is lowered. The grout return pipe 20 is provided so as to be able to control the grout return pipe 20, and the injection valve 231 and the return valve 232 can be operated in such a manner that they are relatively locked or released relative to each other. For example, in order to increase the injection pressure, the injection valve 231 may be further loosened and the return valve 232 may be further locked. In order to lower the injection pressure, the injection valve 231 may be further locked and returned The valve 232 may be further loosened.

A detailed embodiment in which the flow rate regulator 230 automatically controls the amount of grout injection using the discharge pressure measured by the first pressure sensor 132 will be described later.

The information such as the injection pressure measured by the controller 200 and the information supplied from the first pressure sensor 132, that is, the discharge pressure and the flow rate of the grout, is output to a separate display (not shown) installed in the controller 200 . The operator can confirm the current injection situation through the display and can manually control the flow rate regulator 230 using the display as a controller when necessary.

The multi-channel pressure receiving module can receive information on the flow status of the grout provided in a plurality of channels in the plurality of observer casing 400 by wire or wireless, and the wireless communication method for transmitting information wirelessly is a Bluetooth And access to ZigBee, WiFi, and mobile communication networks.

The multi-channel pressure receiving module can be set up to 36 channels, and the frequency range designed by 36 channels is 447Mhz, the radio power is about 10dBm, and the channel spacing is set to 12.5Khz. In this case, when the antenna height is 2m and the input power is about 3V, the reception ratio of 100% of the communication data by distance is measured for the transmission and reception of wireless data.

When the data amount of about 1,200 bps was transmitted, the transmission rate of 100% distance was about 1,470 m. When the maximum of 9,600 bps was set, the reception rate of 100% without loss of data was about 520 m.

In fact, it can be said that the transmission and reception distances are suitable for the size of the old reservoir reservoir if the old barbed material of the existing existing fill dams and reservoirs (levees) is rarely more than 500m and the sensor communication part and the central ground system can be fixed at the center of the body.

The supply unit 300 may sequentially supply the grout to the control unit 200 and the grouting packer apparatus 100 and may include a pump 310 and a mixer 320 for this purpose.

The mixer 320 mixes the grout, and the pump 310 feeds the grout generated in the mixer 320 to the control unit 200. The controller 200 controls the pump 310 to adjust the amount of grout fed to the controller 200. That is, the controller 200 controls the pump 310 or the flow controller 230 to adjust the amount of grout delivered to the grout packer 100.

At least one observer casing 400 may be installed at a predetermined interval with the grouting packer device 100 so as to grasp the flow state of the grout. The observer casing 400 may include an observer sensor 410 and a sensor box 420.

The observer sensor 410 is embedded in the ground and may include a sensor line 411 and a pressure sensing sensor 412. The observer sensor 410 senses a pressure generated by the grout, As shown in FIG.

The sensor line 411 may extend from the sensor box 420 and may be embedded in the ground by connecting the pressure sensing sensor 412 to the sensor line 411 at predetermined intervals.

The pressure sensing sensor 412 is coupled with the sensor line 411 to sense the pressure generated when the grouting is applied during the grouting, thereby detecting the direction and specificity of the grouting.

The observer sensor 410 may be installed at the edge of the fill dam to provide information to the controller 200 when the grout is out of the range of the fill dam, thereby stopping the grout injection. In addition, a plurality of observer sensors 410 may be installed between the observer sensors 410 installed at the edge of the fill dam and the grouting packer device 100 at a predetermined interval, whereby the flow status of the grout can be grasped, It is possible to grasp the route in which the grout moves in the ground.

Conventionally, when the grout is leaked and the injection of the grout is interrupted, it is difficult to find the position where the grout is leaked. Further, as the time for grasping the leaked position increases, the time and cost consumed for processing the leaked grout additionally occur There was a problem.

The present invention can reduce the time required for finding the location where the grout is leaked in the event of an unexpected event by detecting the route through which the grout moves in the ground, thereby further reducing the time and cost consumed. As a result, the entire disclosure period and the construction cost can be reduced finally.

As shown in FIG. 6, the depth and pressure of the ground passing through the grout can be grasped by the number of the observer sensor 410. Accordingly, it is possible to estimate the position where the grout leaks when an unexpected situation occurs.

The sensor box 420 may include a sensing unit 421, a measuring unit 422 and a communication unit 423. The sensing unit 421 senses the pressure sensed by the observer sensor 410, And can provide the pressure information measured by the measuring unit 422 to the control unit 200 through the communication unit 423. [

The sensing part sensing part 421 is provided in the sensor box 420 and can sense the flow state of the grout by the pressure sensed by the pressure sensing sensor 412 embedded in the ground.

The measurement unit 422 is provided in the sensor box 420 and can measure the pressure applied to the pressure sensing sensor 412 by the information sensed by the sensing sensor unit 421. The measured information is transmitted to the communication unit 423 To the control unit 200 in a wireless manner (remote).

The communication unit 423 is provided in the sensor box 420 and can wirelessly (remotely) provide the pressure information measured by the measuring unit 422 to the control unit 200. The communication unit 423 includes the observer sensor 410, (Flow pressure of the grout) around the observer sensor 410 at a predetermined distance, and transmit the pressure to the control unit 200 through wireless communication.

As shown in FIG. 7, the operator can check various kinds of information outputted on the display through the terminal 500 in real time, and at the same time, the control unit 200 can be manually controlled. The terminal 500 may be connected to a display to transmit and output information, and may be directly connected to the control unit 200 without being connected to a display, and may transmit and output various information.

The connection of the terminal 500 with the controller 200 or the display may be wired or wireless, and when the connection mode is wireless, the Bluetooth mode shown in FIG. 7, the connection with the Zigbee, the Wi- Can be used.

As shown in FIG. 8, information such as the discharge pressure, the injection pressure, and the flow rate of the grouting are outputted, and this information is displayed in a graph so that the user can intuitively confirm the relevant information.

8, since the waveform W1 of the injection pressure shown in green color is the waveform measured on the ground as in the prior art 1, the pulsation generated in the supply part 300 is included in the waveform, It is difficult for the separate control unit to see the waveform and to change the injection pressure. On the other hand, since the waveform W2 of the discharge pressure shown in blue is more stable than the waveform W1 of the injection pressure, it is easy to adjust the discharge pressure through the worker or the flow rate controller 230 .

Hereinafter, a method for controlling the grout injection pressure in the grout packer 100 by controlling the flow rate controller 230 in the controller 200 will be described.

First, in order to set the grout injection pressure of the grout packer 100, it is necessary to investigate the pore water pressure around the perforation hole. When the pore water pressure around the perforation hole is P, the injection pressure of the grout packer 100 is set to 3P or more and 5P or less. In general, the injection is performed at a very low pressure. Can be increased up to 4 times the total stress. However, this is only a range set in the present invention, and the injection pressure can be adjusted by varying the injection speed depending on the field conditions.

As described above, the reference pressure, the upper limit value, and the lower limit value of the grout injection pressure through the grout packer 100 are determined through the exploration around the perforation hole, and the grout is introduced into the grout packer 100 while injecting the grout into the ground. 1, the injection pressure of the grout in the flow meter 220 and the injection pressure in the ground of the second pressure sensor 210 are measured.

The grout is injected at a reference pressure of the grout injection pressure. At this time, the injection valve 231 may be 100% open and the return valve 232 may be 0% open.

If the injection pressure of the grout exceeds the upper limit value, the injection valve 231 is opened 100% and the return valve 232 is 0% opened when the number of times is counted by the preset time or predetermined time The injection pressure can be adjusted by adjusting the preset%. For example, opening the injection valve 231 by 90% and opening the return valve 232 by 10% may reduce the injection amount of the grout injected into the injection pipe 110, thereby also reducing the grout injection pressure. The injection valve 231 is opened by 90% and the return valve 232 is opened by 10% to return the injection pressure to the normal state. However, if the injection pressure does not decrease, the injection valve 231 is opened by 80% The injection pressure can be adjusted while gradually decreasing the injection amount of the grout injected into the injection tube 110 by opening the injection port 232 at 20%.

If the injection pressure of the grout decreases below the lower limit value, it is judged that a spalling occurs or another problem has occurred and the injection of grout can be stopped if the pressure exceeds the number of times counted by the preset time or the preset time.

If the injection pressure of the grout decreases below the lower limit value and exceeds the number of times counted by the preset time or predetermined time, the grout injection is stopped, and the grout packer 100 is moved to another through hole to carry out the subsequent work .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Of course, such modifications are within the scope of the claims.

1: Grouting Underground injection pressure integrated control device
10: injection tube 20: return tube 30: feed tube
100: grouting packer device
110: grout injection pipe
120: first packer member
130: Pressure sensor unit
131: Connector
132: first pressure sensor
133: Communication line
140: second packer member
150: Packer
200:
210: second pressure sensor
220: Flowmeter
230:
231: injection valve
232: return valve
300:
310: pump
320: Mixer
400: Observer casing
410: observer sensor
411: sensor line
412: Pressure sensor
420: sensor box
421:
422:
423:
500: terminal

Claims (7)

A grouting packing device installed in the grout injection pipe to receive the grout from the supply part and discharge it to the ground of the fill dam and measure the discharge pressure of the grout discharged from the ground of the fill dam by using the first pressure sensor;
A control unit for receiving information on the discharge pressure measured by the grouting packer device in real time and controlling the injection pressure by controlling the injection amount according to the discharge pressure; And
An observer casing installed at both side edges of the section of the fill dam;
And an observer casing disposed between the observer casings provided at both side edges of the fill dam surface and at least one observer casing installed at a predetermined interval from the grouting packer device, ,
Wherein the control section includes: an observer casing installed at both side edges of the fill-dam section, ii) an observer casing installed at both side edges of the fill-dam section, and an observer casing disposed at both side edges of the fill- The grouting packer device and the observer casing installed at least one at a predetermined interval are provided with information for grasping the flow status and movement path of the grout injected from the grouting packer device,
The control unit
A second pressure sensor installed on the grout injection pipe for measuring the injection pressure of the grout injected from the supply unit on the ground,
A flow meter installed in the grout injection pipe and measuring a flow rate of the grout injected through the grout injection pipe,
A flow rate controller for controlling the flow rate of the grout by controlling the injection valve and the return valve according to the discharge pressure of the grout transferred from the grouting packer device,
And a multichannel pressure receiving module for receiving information on flow status of grout provided in a plurality of channels from the observer casing,
The observer casing
A plurality of observer sensors installed in the ground to detect pressure generated by the flow of the grout,
And a sensor box for measuring the flow state of the grout detected by the observer sensor and the flow pressure to sense the movement path, and transmitting the information on the flow path to the control unit in real time,
The control unit
When the discharge pressure of the grout exceeds the upper limit value, the injection valve is closed by a predetermined percentage each time the predetermined time or the number of times counted by the predetermined time is exceeded, and at the same time, the return valve is opened by a predetermined percentage Even if the injection amount or the injection amount is controlled before the return valve is opened 100% or before the opening of the return valve is 100%, the discharge pressure is controlled to be within the reference pressure range If it does not, or if it is below the lower limit value, stop the injection of grout,
The grouting packer device prevents the grout, which is injected into the ground of the fill dam, from flowing out to the nearby farmland and the reservoir by the information transmitted from the observer casing,
Wherein when the discharge pressure measured by the grouting packer device changes suddenly, the information provided by the observer casing is used to shorten the discovery time of the place where the outflow of the grout or grout occurs. delete delete delete delete delete The method according to claim 1,
The sensor box
Wherein a flow path and a flow pressure are measured and sensed by a grout flowing through a pressure sensor installed at predetermined intervals in a sensor line extending from the sensor box so as to grasp a movement route, Control device.

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