CN215629700U - Simulation test device for evaluating concentrated leakage plugging material of earth-rock dam - Google Patents
Simulation test device for evaluating concentrated leakage plugging material of earth-rock dam Download PDFInfo
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Abstract
The utility model provides a simulation test device for evaluating a concentrated leakage plugging material of an earth-rock dam. The simulation test device comprises an upper opening type transparent reservoir, a triangular measuring weir and a leakage channel for communicating the leakage channel with the triangular measuring weir, wherein one side of the transparent reservoir is an inclined surface, an inlet of the leakage channel is arranged on the inclined surface of the transparent reservoir, and a first flow control valve is arranged on the leakage channel; the top of the transparent reservoir is provided with a water inlet pipe, the bottom of the transparent reservoir is provided with a water outlet pipe, a flowmeter is arranged in the triangular water measuring weir, and the water inlet pipe and the water outlet pipe are both provided with second flow control valves. The utility model can simulate leakage passages of earth and rockfill dams, simulate field working conditions, compare and analyze the plugging effects of plugging measures, material processes and the like by testing the plugging time of different plugging materials and the change of water flow at the tail ends of the leakage passages, and provide powerful technical support for comparison selection and performance evaluation of the concentrated leakage passage plugging materials of the earth and rockfill dam engineering.
Description
Technical Field
The utility model belongs to the field of hydraulic engineering, and particularly relates to a simulation test device for evaluating a concentrated leakage plugging material of an earth-rock dam, aiming at evaluating the plugging effect of the plugging material and a process by testing the plugging capability of the plugging material in the simulation device and providing technical support for field application.
Background
The seepage problem is difficult to avoid due to the characteristics of the granular materials of the earth-rock dam, and the soil body can be locally damaged due to the mechanical or chemical action of the soil-rock dam, which is called as 'osmotic damage'. Especially, the leakage of dikes and earth dams or the concentrated leakage caused by the erosion inside the filling of earth and rockfill dams can easily cause piping and even serious consequences of dam break, so that control measures must be taken as soon as possible. However, when leakage plugging is performed, the selection of plugging materials is important, and generally, the leakage plugging materials suitable for dikes or earth dams can be selected only by researching and comparing various plugging materials, and at present, no special testing device is used for researching the effect of the leakage plugging materials of the earth and rockfill dams.
Disclosure of Invention
The utility model provides a simulation test device for evaluating a concentrated leakage plugging material of an earth-rock dam, which can be used for simulating and researching the plugging by adopting the plugging material after the concentrated leakage phenomenon of the earth-rock dam occurs, and can know the effect of the plugging material by simulating and comparing the plugging effect of the plugging material, thereby providing technical support for the selection and application of field materials.
In order to achieve the technical purpose, the utility model provides a simulation test device for evaluating a concentrated leakage plugging material of an earth-rock dam, which is characterized in that: the simulation test device comprises an upper opening type transparent reservoir, a triangular measuring weir and a leakage channel for communicating the leakage channel with the triangular measuring weir, wherein one side of the transparent reservoir is an inclined surface, an inlet of the leakage channel is arranged on the inclined surface of the transparent reservoir, and a first flow control valve is arranged on the leakage channel; the top of the transparent reservoir is provided with a water inlet pipe, the bottom of the transparent reservoir is provided with a water outlet pipe, a flowmeter is arranged in the triangular water measuring weir, and the water inlet pipe and the water outlet pipe are both provided with second flow control valves.
The further technical scheme of the utility model is as follows: the simulation test device further comprises a feeding pipe, wherein the feeding pipe extends into the transparent reservoir from the open face of the transparent reservoir, and the outlet of the feeding pipe is opposite to the inlet of the leakage channel on the transparent reservoir.
The utility model has the following excellent technical scheme: the inclined surface of the transparent reservoir is provided with a plurality of leakage channel connecting ports which are arranged on the same straight line from top to bottom at equal intervals along the inclined surface, and each leakage channel connecting port is correspondingly provided with a plugging cover; the seepage channel is a transparent cylindrical hollow pipeline, one end of the seepage channel, which is connected with the transparent reservoir, is provided with a connecting end matched with the seepage channel connecting port, one end of the seepage channel is hermetically connected with any one seepage channel connecting port through the connecting end, and the other end of the seepage channel extends into the triangular measuring weir.
The utility model has the following excellent technical scheme: the transparent reservoir is erected in the position higher than the triangular water measuring weir through the supporting frame, and the leakage channel extends into the triangular water measuring weir from the upper part of the triangular water measuring weir.
The utility model has the following excellent technical scheme: the triangle weir is made for transparent material, and its uncovered face is equipped with the closing cap, be equipped with on the closing cap with seepage passageway external diameter assorted inserted hole, in the seepage passageway inserts triangle weir through the inserted hole, still is equipped with the fixed mouth of flowmeter on the closing cap, the flowmeter is installed and is gone out at the fixed mouthful of flowmeter, and its test probe stretches into in the triangle weir to the touching surface of water.
The utility model has the following excellent technical scheme: the leakage channel is a transparent cylindrical hollow pipeline made of organic glass, fillers with different specifications are arranged in the leakage channel, and the fillers are blind pipes or gravel materials; the filler fills the leakage path completely or partially.
The utility model has the following excellent technical scheme: the inlet tube sets up the top in the inclined plane one side of transparent cistern to through support fixed stay.
The utility model has the following excellent technical scheme: the seepage channel connector is a threaded connector, the plugging cover is a threaded cover matched with the threaded connector, a cylindrical plugging block which is smaller than the inner diameter of the seepage channel connector by 2-3 mm is arranged in the plugging cover, and the plugging block is embedded into the seepage channel connector after the plugging cover is in threaded connection with the seepage channel connector.
Aiming at the situation that the earth-rock dike dam is intensively leaked to generate a leakage channel, the utility model designs a plugging material performance testing device system through a test. The device consists of two parts, wherein one part is a dam leakage physical model, simulates the situation that a centralized leakage inlet on the upstream surface forms a leakage channel, and can design the inclination angle of the inclined plane and a leakage channel connector according to the parameters of dam slope ratio, water level, position size of the leakage inlet, size of the leakage channel, flow rate and the like according to the test requirements; the other part is a seepage flow device for detecting a seepage channel and is used for observing the change of the seepage flow at the tail end of the seepage channel before and after plugging. The testing device comprises a transparent reservoir provided with a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is used for simulating water inlet of an indoor device system, the water outlet pipe is used for simulating water drainage of the indoor device system, and the water inlet amount and the water outlet amount are controlled through a first flow regulating valve to ensure that the water level of the transparent reservoir is always balanced. Be equipped with the seepage import in one side of cistern and be used for connecting the seepage passageway, seepage import and triangle weir are connected respectively at seepage passageway both ends, and the inside of triangle weir sets up the flowmeter for the seepage flow of monitoring seepage passageway.
The utility model has the beneficial effects that:
(1) the concentrated leakage dangerous case of this application simulation dykes and dams engineering, according to on-the-spot dangerous case difference or experimental demand, adjusts slope ratio, water level, the position size of leakage import and the size of leakage passageway through the selection of inclined plane setting and leakage import position for the test scheme is diversified, multi-level, the variety accords with actual site operating mode, is favorable to the practical application of engineering.
(2) The utility model provides a simulation environment for the leakage plugging or crack repairing work of the embankment engineering, and is convenient for carrying out comparison evaluation on different plugging materials according to the plugging time of different plugging materials in the leakage channel and the change of the water flow at the tail end of the leakage channel.
The utility model can simulate leakage passages of earth and rockfill dams, customize different test environments individually, simulate field working conditions, and provide powerful technical support for selection and performance evaluation of leakage passage leakage stopping materials in earth and rockfill dam engineering by testing the plugging time of different leakage stopping materials and the change of water flow at the tail ends of the leakage passages and comparing and analyzing the plugging effects of leakage stopping measures, material processes and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the leak path of the present invention;
fig. 3 is a schematic view of the construction of the block-out cover of the present invention.
In the figure: 1-reservoir, 2-seepage passage, 3-first flow control valve, 4-drain pipe, 5-second flow control valve, 6-triangle weir, 7-flowmeter, 8-inlet tube, 9-seepage passage connector, 10-shutoff lid, 11-feeding pipe, 12-filler, 13-support, 14-shutoff piece.
Detailed Description
The utility model is further illustrated by the following figures and examples. Fig. 1 to 3 are drawings of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The following claims presented in the drawings are specific to embodiments of the utility model and are not intended to limit the scope of the claimed invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The embodiment provides a simulation test device for evaluation of concentrated leakage plugging materials of earth and rockfill dams, as shown in fig. 1, the simulation test device comprises an upper open type transparent reservoir 1, a triangular water gaging weir 6, a feeding pipe 11 and a leakage channel 2 for communicating the leakage channel 2 with the triangular water gaging weir 6, wherein the feeding pipe 11 extends into the transparent reservoir 1 from the open face of the transparent reservoir 1, and the outlet of the feeding pipe is opposite to the inlet of the leakage channel 2 on the transparent reservoir 1, so that the leakage materials can be conveniently put into the leakage channel 2. Transparent cistern 1 erects in the position that is higher than triangle weir 6 through the support frame, and seepage passage 2 stretches into from the upper portion of triangle weir 6. One side of the transparent reservoir 1 is an inclined plane 100, the inclined plane 100 is used for simulating a water-facing slope surface of an earth-rock dike dam, the simulated slope is 1: 1-3, the inclined plane 100 of the transparent reservoir 1 is provided with a plurality of leakage channel connecting ports 9, the plurality of leakage channel connecting ports 9 are arranged on the same straight line from top to bottom at equal intervals along the inclined plane 100, and each leakage channel connecting port 9 is correspondingly provided with a blocking cover 10; in the embodiment, the leakage channel connecting port 9 is a threaded connecting port, the plugging cover 10 is a threaded cover matched with the threaded connecting port, a cylindrical plugging block 14 with the inner diameter being 2-3 mm smaller than the leakage channel connecting port 9 is arranged in the plugging cover 10, and after the plugging cover 10 is in threaded connection with the leakage channel connecting port 9, the plugging block 14 is embedded into the leakage channel connecting port 9. Be equipped with inlet tube 8 at 1 top of transparent cistern, the bottom is equipped with drain pipe 4, is equipped with flowmeter 7 in triangle weir 6, all is equipped with second flow control valve 5 on inlet tube 8 and drain pipe 4, inlet tube 8 sets up the top in the inclined plane 100 one side of transparent cistern 1 to through support 13 fixed stay.
In the embodiment, the leakage channel 2 is a transparent cylindrical hollow pipeline made of organic glass, as shown in fig. 2, a connection end 200 matched with the leakage channel connection port 9 is arranged at one end of the transparent reservoir 1, one end of the leakage channel 2 is hermetically connected with any one of the leakage channel connection ports 9 through the connection end 200, the other end of the leakage channel extends into the triangular measuring weir 6, the leakage channel 2 is provided with a first flow control valve 3, a filler 12 with different specifications can be arranged inside the leakage channel 2 to simulate an irregular leakage channel of a dam, the filler 12 is a blind pipe or gravel, the leakage channel 2 can be completely filled, and half of the filler can be filled. The triangular water weir 6 is made of transparent materials, a sealing cover 600 is arranged on the opening surface of the triangular water weir, an insertion opening matched with the outer diameter of the leakage channel 2 is formed in the sealing cover 600, and the leakage channel 2 is inserted into the triangular water weir 6 through the insertion opening; still be equipped with the flowmeter fixed orifices on the closing cap 600, flowmeter 7 is installed and is gone out at the flowmeter fixed orifices, and its test probe stretches into in triangle gaging weir 6 to touching the surface of water, flowmeter 7 adopts ordinary flowmeter, and its test probe stretches into the water level before the surface of water test goes out the intaking in triangle gaging weir 6 before the test, then after the simulation experiment is accomplished, makes its probe rise to new surface of water through adjusting flowmeter 7, reads out twice flow difference through the last scale interval of flowmeter, alright calculate the flow.
The plugging effect in the embodiment is analyzed and evaluated through the front and back flow changes, and the test parameters comprise the slope ratio of the dam, the water level, the position size of a leakage inlet, the pipe diameter, the length and the horizontal angle of a leakage channel; all parameters are determined according to the field environment analysis data and the test requirements. The specific test process is as follows:
aiming at the situation that a certain embankment project needs to be blocked by using a plugging material for centralized leakage, the upstream slope ratio of the embankment is 1:2 through field survey, and detection results show that a leakage inlet is positioned at about 1.5m underwater, the defects of the leakage inlet are centralized and are about 0.5m approximately2In the range, two obvious leakage points are detected at the downstream, the water flow leakage amount is about 15-20L/s and 8-9L/s, and different materials are adopted to perform underwater leakage plugging on the upstream face. Aiming at the field environment and experimental conditions, the model sets two leakage channels with a horizontal angle of 5 degrees, a length of 2m, pipe diameters of 150mm and 100mm respectively, and the flow is controlled within the ranges of 15-20L/s and 8-9L/s respectively in a mode that blind pipes are filled in the part in the pipeline.
Three plugging materials are selected indoors for comparison test, and the instantaneous plugging capability of different materials is inspected. The material is delivered uniformly by adopting a chute method, and is delivered to a leakage point in a rapid-first and slow-later mode. The results of the 150mm leak path plugging test are shown in table 1.
TABLE 1 leakage-stopping Material leakage-stopping amount at end of leakage passage after input
According to the data in the table 1, the downstream flow of the flowmeter is about 17L/s before the channel is plugged, and after the three materials are used for plugging, a certain plugging effect is exerted. In contrast, the material S3 showed the best plugging effect, and the seepage rate at the end of the seepage channel was reduced from 16.715L/S to 0.006L/S within 60 min.
Table 2 shows the test results of the pipe diameter of the leakage channel of 100mm, and the selected plugging materials are S2 and S3. According to the data in the table 2, after the pipe diameter of the leakage channel is changed from 150mm to 100mm, the leakage flow of the leakage channel is reduced from about 16.8L/s to about 8.8L/s; the seepage flow at the tail end of the seepage channel is in a relatively stable state at 20min, and the influence of the seepage channels with two pipe diameters on the plugging performance of the material is not obviously different.
TABLE 2 seepage at the end of the leakage path after the S3 and S4 materials are put into
According to the seepage flow rates at the tail ends of the seepage channels of 30min and 60min after the materials S2 and S3 are put into the device, the seepage flow rate of the material S2 is not changed greatly at 60min and 30min, and the seepage flow rate of the material S3 is reduced by 50% at 60min compared with 30 min. The comprehensive simulation test results show that the leakage plugging of the materials S2 and S3 is better than that of S1.
The utility model provides a simulation environment for the leakage plugging or crack repairing work of the embankment engineering, and is convenient for carrying out comparison evaluation on different plugging materials according to the plugging time of different plugging materials in the leakage channel and the change of the water flow at the tail end of the leakage channel.
The above description is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides a simulation test device that is used for seepage plugging material evaluation is concentrated to earth and rockfill dam which characterized in that: the simulation test device comprises an upper open type transparent reservoir (1), a triangular measuring weir (6) and a leakage channel (2) for communicating the leakage channel (2) with the triangular measuring weir (6), wherein one side of the transparent reservoir (1) is an inclined plane (100), an inlet of the leakage channel (2) is arranged on the inclined plane (100) of the transparent reservoir (1), and the leakage channel (2) is provided with a first flow control valve (3); the top of the transparent reservoir (1) is provided with a water inlet pipe (8), the bottom of the transparent reservoir is provided with a water outlet pipe (4), a flowmeter (7) is arranged in the triangular water weir (6), and the water inlet pipe (8) and the water outlet pipe (4) are both provided with a second flow control valve (5).
2. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 1, wherein: the simulation test device further comprises a feeding pipe (11), wherein the feeding pipe (11) extends into the transparent reservoir (1) from the open face of the transparent reservoir (1), and the outlet of the feeding pipe (11) is opposite to the inlet of the leakage channel (2) on the transparent reservoir (1).
3. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 1 or 2, wherein: a plurality of leakage channel connecting ports (9) are arranged on an inclined plane (100) of the transparent reservoir (1), the plurality of leakage channel connecting ports (9) are arranged on the same straight line at equal intervals from top to bottom along the inclined plane (100), and each leakage channel connecting port (9) is correspondingly provided with a plugging cover (10); the seepage passage (2) is a transparent cylindrical hollow pipeline, one end of the seepage passage (2) connected with the transparent reservoir (1) is provided with a connecting end (200) matched with the seepage passage connecting port (9), one end of the seepage passage (2) is hermetically connected with any seepage passage connecting port (9) through the connecting end (200), and the other end of the seepage passage extends into the triangular measuring weir (6).
4. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 1 or 2, wherein: transparent cistern (1) erect in the position that is higher than triangle weir (6) through the support frame, and seepage passage (2) stretch into from the upper portion of triangle weir (6).
5. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 1 or 2, wherein: triangle weir (6) are made for transparent material, and its uncovered face is equipped with closing cap (600), be equipped with on closing cap (600) with seepage passageway (2) external diameter assorted inserted hole, seepage passageway (2) insert triangle weir (6) through the inserted hole in, still are equipped with the fixed mouth of flowmeter on closing cap (600), flowmeter (7) are installed and are gone out at the fixed mouth of flowmeter, and its test probe stretches into in triangle weir (6) to the touching surface of water.
6. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 1 or 2, wherein: leakage passageway (2) are the transparent cylindrical hollow pipeline of organic glass material, set up filler (12) of different specifications in its inside, filler (12) are blind pipe or gravel material, and filler (12) are with leakage passageway (2) whole packing or partial packing.
7. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 1 or 2, wherein: the water inlet pipe (8) is arranged at the top of one side of the inclined surface (100) of the transparent water reservoir (1) and is fixedly supported by the bracket (13).
8. The simulation test device for evaluating the concentrated leakage plugging material of the earth-rock dam as claimed in claim 3, wherein: the leakage channel connecting port (9) is a threaded connecting port, the plugging cover (10) is a threaded cover matched with the threaded connecting port, a cylindrical plugging block (14) smaller than the inner diameter of the leakage channel connecting port (9) by 2-3 mm is arranged in the plugging cover (10), and the plugging block (14) is embedded into the leakage channel connecting port (9) after the plugging cover (10) is in threaded connection with the leakage channel connecting port (9).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117107769A (en) * | 2023-10-23 | 2023-11-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Grading-considered soil dam leakage channel electric repairing device and grading-considered soil dam leakage channel electric repairing method |
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2021
- 2021-07-27 CN CN202121715477.XU patent/CN215629700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117107769A (en) * | 2023-10-23 | 2023-11-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Grading-considered soil dam leakage channel electric repairing device and grading-considered soil dam leakage channel electric repairing method |
| CN117107769B (en) * | 2023-10-23 | 2024-01-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Grading-considered soil dam leakage channel electric repairing device and grading-considered soil dam leakage channel electric repairing method |
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