Deepwater grouting system and method for seepage damage of concrete faced rockfill dam in operation state

Abstract

The invention provides a concrete faced rockfill dam leakage disease deepwater grouting system and method in a running state, the system comprises a working floating platform, the working floating platform is provided with a double-layer stirring barrel, a high-pressure grouting pump, a slurry inlet pipe, an orifice pipe, a slurry outlet pipe and a slurry receiving barrel, the double-layer stirring barrel, the high-pressure grouting pump and the slurry inlet pipe are communicated in sequence, and the slurry outlet pipe is communicated with the slurry receiving barrel; the slurry inlet pipe and the slurry outlet pipe are communicated with the orifice pipe; a first tilt angle sensor is arranged at the end, located on one side of the working floating platform, of the orifice pipe, a second tilt angle sensor is arranged at the position, located below the working floating platform and close to the drill hole, of the orifice pipe, and the first tilt angle sensor and the second tilt angle sensor are connected with the host. The system can monitor the perpendicularity of the super-long cantilever orifice pipe in the grouting process, so that the possibility of drill hole abrasion caused by inclination of the orifice pipe is reduced, and the deepwater grouting quality is greatly improved; and the whole grouting process can be monitored in real time through data acquired by a plurality of sensors.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower engineering, and in particular to a deep-water grouting system and method for leakage problems of a panel rockfill dam in operation. Background Art

[0002] There are more than 400 concrete panel dams with a height of more than 30m in my country, distributed throughout the country. Among them, some dams have leakage problems and usually require grouting treatment. Generally, grouting treatment requires the reservoir to be emptied, which affects the normal operation of the reservoir, resulting in economic losses and social impacts. With the advancement of technology, deep-water grouting treatment has become possible under the operation of high-panel rockfill dams. In the process of deep-water grouting treatment, it is necessary to use a surface platform and divers to cooperate to install the orifice pipe. After installation, effectively maintaining the verticality of the extra-long cantilever orifice pipe is one of the important contents to avoid wear of the drill hole during the grouting process and improve the grouting quality. Summary of the invention

[0003] The first object of the present invention is to provide a deep water grouting system for leakage problems of a face rockfill dam in operation in response to the above-mentioned problems.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A deepwater grouting system for treating leakage problems of a face rockfill dam in operation comprises a working floating platform, on which are provided a double-layer mixing barrel, a high-pressure grouting pump, a slurry inlet pipe, an orifice pipe, a slurry outlet pipe, and a slurry receiving barrel.

[0006] The double-layer mixing barrel, the high-pressure grouting pump, and the slurry inlet pipe are connected in sequence, the slurry outlet pipe is connected to the slurry receiving barrel, and the slurry inlet pipe and the slurry outlet pipe are connected to the orifice pipe;

[0007] The orifice pipe is provided with a first inclination sensor at one end of the working platform, and the orifice pipe is provided with a second inclination sensor near the drilling hole under the working platform. The first inclination sensor and the second inclination sensor are connected to the host.

[0008] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions:

[0009] As a preferred technical solution of the present invention: a first flow sensor is provided on the connecting pipeline between the double-layer mixing barrel and the high-pressure grouting pump, and the first flow sensor is connected to the host signal; a second flow sensor is provided on the connecting pipeline between the slurry outlet pipe and the slurry receiving barrel, and the second flow sensor is connected to the host signal.

[0010] As a preferred technical solution of the present invention: a specific gravity sensor is provided near the slurry receiving barrel, the specific gravity sensor is connected to the host signal, and the specific gravity sensor is used to detect whether the specific gravity of the returned slurry meets the engineering requirements.

[0011] As a preferred technical solution of the present invention: a high-pressure ball valve is provided on the connecting pipeline between the slurry outlet pipe and the slurry receiving barrel.

[0012] As a preferred technical solution of the present invention: a first pressure gauge is provided near the outlet of the slurry outlet pipe, and a second pressure gauge is provided on the connecting pipeline between the slurry outlet pipe and the slurry receiving barrel.

[0013] As a preferred technical solution of the present invention: a pressure sensor is provided on the connecting pipeline between the slurry outlet pipe and the slurry receiving barrel, and the pressure sensor is connected to the main machine.

[0014] The second object of the present invention is to provide a deep water grouting method for leakage problems of a face rockfill dam in operation.

[0015] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions:

[0016] A deep water grouting method for leakage of a face rockfill dam in operation, characterized in that: the monitoring method is based on the grouting system described above, and includes the following process:

[0017] -The host obtains the inclination data collected by the first inclination sensor and the second inclination sensor, and determines whether the orifice pipe on which the first inclination sensor and the second inclination sensor are arranged is vertical. If inclination occurs, grouting is stopped;

[0018] -The host obtains the flow data collected by the first flow sensor and the second flow sensor, and determines whether the flow meets the engineering requirements;

[0019] -The host obtains the pressure data collected by the pressure sensor and determines whether to open or close the high-pressure ball valve;

[0020] -The host obtains the slurry specific gravity data of the return slurry collected by the specific gravity sensor, and determines whether the slurry specific gravity of the return slurry meets the engineering requirements. If it meets the engineering requirements, the return slurry can be used for circulation grouting.

[0021] The present invention provides a deep-water grouting system and method for leakage problems of a panel rockfill dam in operation, which has the following beneficial effects: the system can monitor the verticality of an extra-long cantilever orifice pipe during the grouting process, thereby reducing the possibility of borehole wear caused by the inclination of the orifice pipe, and greatly improving the quality of deep-water grouting; data obtained by a first flow sensor, a first inclination sensor, a second inclination sensor, a pressure sensor, a second flow sensor, and a specific gravity sensor can then be used to monitor the entire grouting process in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the deep water grouting system for the leakage of a panel rockfill dam provided by the present invention in operation.

[0023] In the figure: 1-working platform; 2-double-layer mixing barrel; 3-high-pressure grouting pump; 4-slurry inlet pipe; 5-orifice pipe; 6-slurry outlet pipe; 7-first pressure gauge; 8-second pressure gauge; 9-high-pressure ball valve; 10-slurry receiving barrel; 11-first flow sensor; 12-first inclination sensor; 13-second inclination sensor; 14-pressure sensor; 15-second flow sensor; 16-specific gravity sensor; 17-host machine. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, a deepwater grouting system for treating leakage problems of a face rockfill dam in operation comprises a working floating platform 1, on which are provided a double-layer mixing barrel 2, a high-pressure grouting pump 3, a slurry inlet pipe 4, an orifice pipe 5, a slurry outlet pipe 6, and a slurry receiving barrel 10.

[0026] The double-layer mixing barrel 2, the high-pressure grouting pump 3, and the slurry inlet pipe 4 are connected in sequence, the slurry outlet pipe 6 is connected to the slurry receiving barrel 10, and the slurry inlet pipe 4 and the slurry outlet pipe 6 are connected to the orifice pipe 5;

[0027] A first inclination sensor 12 is provided at the end of the orifice pipe 5 on one side of the working platform 1, and a second inclination sensor 13 is provided at the orifice pipe 5 under the working platform 1 near the drill hole. The first inclination sensor 12 and the second inclination sensor 13 are connected to the main machine 17 for monitoring the verticality of the orifice pipe 5. When the data sent back by the inclination sensor shows that the orifice pipe 5 is greatly tilted, the grouting is stopped.

[0028] A first flow sensor 11 is provided on the connecting pipeline between the double-layer mixing barrel 2 and the high-pressure grouting pump 3. The first flow sensor 11 is connected to the main engine 17 signal for monitoring the slurry flow rate. A second flow sensor 15 is provided on the connecting pipeline between the slurry outlet pipe 6 and the slurry receiving barrel 10. The second flow sensor 15 is connected to the main engine 17 signal for monitoring the slurry outlet flow rate.

[0029] A specific gravity sensor 16 is provided near the slurry receiving barrel 10, and the specific gravity sensor 16 is connected to the host 17 signal. The specific gravity sensor 16 is used to detect whether the specific gravity of the return slurry (the ratio of the density of the slurry to the density of water) meets the engineering requirements. If so, the return slurry is continued to be used for circulating grouting.

[0030] A high-pressure ball valve 9 is provided on the connecting pipeline between the slurry outlet pipe 6 and the slurry receiving barrel 10 .

[0031] A first pressure gauge 7 is provided near the outlet of the slurry outlet pipe 6, and a second pressure gauge 8 is provided on the connecting pipeline between the slurry outlet pipe 6 and the slurry receiving barrel 10. The first pressure gauge 7 and the second pressure gauge 8 are used to monitor the pressure of the return slurry. According to the readings of the two pressure gauges, it can also be judged whether the pipeline between the two pressure gauges is working normally.

[0032] A pressure sensor 14 is provided on the connecting pipeline between the slurry outlet pipe 6 and the slurry receiving barrel 10. The pressure sensor 14 is connected to the host 17 and is used to transmit the pressure information of the return slurry to the host 17 to determine whether the grouting system is in normal working condition.

[0033] A method for monitoring the deep water grouting process of leakage of a concrete face rockfill dam under operation includes the following process:

[0034] - The host 17 obtains the inclination data collected by the first inclination sensor 12 and the second inclination sensor 13, and determines whether the orifice pipe 5 on which the first inclination sensor 12 and the second inclination sensor 13 are arranged is vertical. If it is tilted, the grouting is stopped;

[0035] - The host 17 obtains the flow data collected by the first flow sensor 11 and the second flow sensor 15, and determines whether the flow meets the engineering requirements;

[0036] - The host 17 obtains the pressure data collected by the pressure sensor 14 and determines whether to open or close the high-pressure ball valve;

[0037] - The host 17 obtains the slurry specific gravity data of the return slurry collected by the specific gravity sensor 16, and determines whether the slurry specific gravity of the return slurry meets the engineering requirements. If it meets the engineering requirements, the return slurry can be used for circulating grouting.

[0038] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A deep water grouting system for leakage of a concrete face rockfill dam in operation, characterized by: The invention comprises a working floating platform (1), on which a double-layer stirring barrel (2), a high-pressure grouting pump (3), a slurry inlet pipe (4), an orifice pipe (5), a slurry outlet pipe (6), and a slurry receiving barrel (10) are arranged. The double-layer mixing barrel (2), the high-pressure grouting pump (3), and the slurry inlet pipe (4) are connected in sequence, the slurry outlet pipe (6) is connected to the slurry receiving barrel (10), and the slurry inlet pipe (4) and the slurry outlet pipe (6) are connected to the orifice pipe (5); The orifice pipe (5) is provided with a first inclination sensor (12) at one end of the working platform (1), and the orifice pipe (5) is provided with a second inclination sensor (13) at a position close to the drilling hole under the working platform (1). The first inclination sensor (12) and the second inclination sensor (13) are connected to a main machine (17).

2. The deep water grouting system for leakage problems of a face rockfill dam in operation according to claim 1 is characterized in that: A first flow sensor (11) is provided on the connecting pipeline between the double-layer mixing barrel (2) and the high-pressure grouting pump (3), and the first flow sensor (11) is connected to the host (17) for signal transmission; A second flow sensor (15) is provided on the communication pipeline between the slurry outlet pipe (6) and the slurry receiving barrel (10), and the second flow sensor (15) is connected to the main machine (17) for signal transmission.

3. The deep water grouting system for leakage problems of a face rockfill dam in operation according to claim 1 is characterized in that: A specific gravity sensor (16) is provided near the slurry receiving barrel (10), and the specific gravity sensor (16) is connected to the host (17) by signal. The specific gravity sensor (16) is used to detect whether the specific gravity of the returned slurry meets the engineering requirements.

4. The deep water grouting system for leakage problems of a face rockfill dam in operation according to claim 1, characterized in that: A high-pressure ball valve (9) is provided on the communication pipeline between the slurry outlet pipe (6) and the slurry receiving barrel (10).

5. The deep water grouting system for leakage of a concrete face rockfill dam in operation according to claim 1 is characterized in that: A first pressure gauge (7) is provided near the outlet of the slurry outlet pipe (6), and a second pressure gauge (8) is provided on the connecting pipeline between the slurry outlet pipe (6) and the slurry receiving barrel (10).

6. The deep water grouting system for leakage problems of a face rockfill dam in operation according to claim 1 is characterized in that: A pressure sensor (14) is provided on the communication pipeline between the slurry outlet pipe (6) and the slurry receiving barrel (10), and the pressure sensor (14) is connected to the main machine (17).

7. A method for monitoring the deep water grouting process of leakage of a face rockfill dam in operation, characterized in that: The monitoring method is based on the deep water grouting system for leakage of a concrete face rockfill dam in operation as claimed in any one of claims 1 to 6, and includes the following process: - The host (17) obtains the inclination data collected by the first inclination sensor (12) and the second inclination sensor (13), and determines whether the orifice pipe (5) on which the first inclination sensor (12) and the second inclination sensor (13) are arranged is vertical, and if it is tilted, the grouting is stopped; - The host (17) obtains the flow data collected by the first flow sensor (11) and the second flow sensor (15), and determines whether the flow meets the engineering requirements; - The host (17) obtains the pressure data collected by the pressure sensor (14) and determines whether to open or close the high-pressure ball valve; - The host (17) obtains the slurry specific gravity data of the return slurry collected by the specific gravity sensor (16), and determines whether the slurry specific gravity of the return slurry meets the engineering requirements. If it meets the engineering requirements, the return slurry can be used for circulating grouting.

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