Earth and rockfill dam body seepage monitoring structure and construction method

Abstract

The invention belongs to the field of seepage monitoring, and provides an earth and rockfill dam body seepage monitoring structure and a construction method.The earth and rockfill dam body seepage monitoring structure comprises a first pipe body, the first pipe body is sleeved with an inner cavity of a second pipe body, and a water inlet hole is formed in the side surface of the left end of the first pipe body; the limiting assembly used for fixing the second pipe body is mounted on the side surface of the right end of the first pipe body; the lifting assembly is mounted in an inner cavity at the left end of the first pipe body; the filtering assembly is detachably mounted on the surface of the left end of the first pipe body; the first pipe body and the second pipe body are fixedly arranged after being adjusted through the limiting assembly, the overall length of the pressure measuring pipe is adjusted according to needs, the use range of the pressure measuring pipe is widened, in the pressure measuring and monitoring use process of the pressure measuring pipe, the filtering assembly filters large-particle impurities in water entering the water inlet hole, and the water quality is improved. The blockage of the water inlet hole is reduced.

Description

Technical Field

[0001] The invention belongs to the field of seepage monitoring, in particular to an earth-rock dam body seepage monitoring structure and a construction method. Background Art

[0002] An earth-rock dam generally refers to a water retaining dam built with local earth, stone or a mixture through methods such as dumping and rolling. When the dam body material is mainly earth and gravel, it is called an earth dam; when it is mainly composed of slag, pebbles and blasted stones, it is called a rockfill dam; when both types of local materials account for a considerable proportion, it is called an earth-rock mixed dam. The earth-rock dam is the oldest type of dam in history. Modern earth-rock dam construction technology has been developed since the 1950s and has led to the construction of a number of high dams. The earth-rock dam is the most widely used and fastest-growing type of dam in the world's dam construction.

[0003] With the development of construction technology, earth-rock dams are becoming more and more widely used due to their simple construction technology, local materials, good seismic resistance, strong applicability and economy. The change of seepage is crucial to the stability of earth-rock dams. Seepage monitoring instruments and equipment include piezometers, distributed optical fibers, pressure tubes and water measuring weirs.

[0004] As for the pressure gauge tube, during the seepage monitoring of the earth-rock dam body by the existing pressure gauge tube, the seepage liquid carries impurities and enters the pressure gauge tube for a long time for pressure monitoring, which will cause silt and impurities to precipitate and clog the tube, affecting the subsequent monitoring effect of the pressure gauge tube and reducing the practicality of the pressure gauge tube.

[0005] To this end, those skilled in the art have proposed a seepage monitoring structure and construction method for an earth-rock dam body to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a seepage monitoring structure and construction method for an earth-rock dam body, so as to solve the problem that in the process of earth-rock dam body seepage monitoring using existing pressure measuring tubes in the prior art, impurities are carried in the seepage liquid, and the seepage liquid enters the pressure measuring tube for a long time for pressure monitoring, resulting in silt and impurities precipitation and blockage, which affects the monitoring effect of the subsequent pressure measuring tube and reduces the practicability of the pressure measuring tube.

[0007] A seepage monitoring structure and construction method for an earth-rock dam body, comprising a first tube body, the first tube body being sleeved in the inner cavity of a second tube body, a water inlet hole being provided on the left end side surface of the first tube body, a flow detection module being installed on the inner side wall of the water inlet hole; a limiting assembly, the right end side surface of the first tube body being provided with a limiting assembly for fixing the second tube body; a pulling assembly, the pulling assembly being installed in the inner cavity of the left end of the first tube body; and a filtering assembly, the filtering assembly being detachably installed on the left end surface of the first tube body.

[0008] Preferably, there are a plurality of water inlet holes, and the plurality of water inlet holes are evenly distributed on the side surface of the left end of the first tube body.

[0009] Preferably, the lifting assembly includes a limiting ring, a limiting block, a connecting rope, a supporting ring, a connecting column and a filter part. The limiting ring is fixedly installed on the inner wall of the right end of the second tube body. The connecting rope passes through the inner cavity of the limiting ring. The limiting block is slidably sleeved on the surface of the connecting rope. The other end of the connecting rope is fixedly connected to the supporting ring. The side surface of the supporting ring is fixedly connected to the connecting column. The side surface of the supporting ring is provided with a detachable filter part, and the side surface of the connecting column is installed with a pressure sensor.

[0010] Preferably, the number of the connecting ropes is two, and the two connecting ropes are symmetrically arranged on the inner wall of the second tube body.

[0011] Preferably, there are two support rings, which are fixedly connected via a connecting column, and the filter portion connected to the outer side of the support ring fits against the inner wall of the first tube body, and the filter portion is disposed in the first tube body.

[0012] Preferably, the filter portion includes a threaded column, a nut, a geotextile and a first filter screen, the geotextile is sleeved on the outer surface of a limiting ring, the outer surface of the geotextile is provided with a first filter screen, an arc-shaped piece is embedded on the side surface of the first filter screen, the side surface of the arc-shaped piece is fixedly connected with a threaded column, the threaded column passes through the first filter screen and the side surface of the geotextile, and one end of the threaded column passes through the limiting ring and is threadedly sleeved with a nut.

[0013] Preferably, the limiting assembly includes a pull rope, a block and a spring, the block is arranged in a slot opened on the side surface of the first tube body, the block is elastically connected to the inner wall of the slot through a spring, the side surface of the block is fixedly connected to the limiting block through a pull rope, the block is engaged and connected with a fixed slot opened on the inner wall of the second tube body, the number of the fixed slots is several, and adjacent fixed slots are equidistantly distributed on the inner wall of the second tube body.

[0014] Preferably, the filter assembly includes a sealing plate, a threaded ring, a second filter screen and a fixed ring, the sealing plate is attached to the left end of the first tube body, a threaded ring is fixedly installed on the right side surface of the sealing plate, and the threaded ring is fixedly connected to the side surface of the fixed ring through the second filter screen.

[0015] Preferably, the threaded ring is threadably sleeved on the left end surface of the first tube body, the second filter screen and the fixed ring are slidably sleeved on the left end of the first tube body, and the second filter screen is sleeved on the outside of the water inlet hole.

[0016] Preferably, a construction method of a seepage monitoring structure of an earth-rock dam body comprises the following steps:

[0017] (i) The sealing plate is attached to the left end of the first tube body, the fixing ring drives the second filter screen to be sleeved on the surface of the first tube body, and the sealing plate is rotated, and the sealing plate drives the threaded ring to be threadedly connected to the left end of the first tube body to ensure the overall fixation and stability of the filter assembly. At the same time, the water entering the water inlet hole on the left end surface of the first tube body is filtered for impurities through the second filter screen to avoid clogging of the water inlet hole. At the same time, a temperature measuring unit is set, which can monitor the seepage through temperature measurement, so as to understand the seepage of the earth-rock dam in real time and facilitate the safe operation of the building;

[0018] (ii) The support ring supports and places the filter part on the inner wall of the left end of the first tube body, and further performs filtering operation through the filter part. When the filter part entering the first tube body is replaced and cleaned, the support ring is driven to move by the connecting rope, and the support ring drives the connecting column and the filter part to move out along the first tube body. By disassembling the nut, the threaded column is driven to detach from the support ring through the arc-shaped sheet, so that the first filter net and geotextile can be removed and cleaned, which is convenient for workers to clean and improves the efficiency of disassembly and cleaning;

[0019] (III) According to the needs of the user, during use, the limit block drives the card block to move into the card slot through the fixedly connected pull rope, moves the position of the second tube body, and after the second tube body moves to an appropriate length, releases the limit block. Under the elastic action of the spring, the spring pushes the card block elastically connected on one side to engage with the fixed slot provided on the inner wall of the second tube body, thereby improving the stability of the connection between the first tube body and the second tube body.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention is convenient for fixing the first tube body and the second tube body after adjustment through the limit assembly, adjusting the overall length of the pressure measuring tube according to demand, and improving the use range of the pressure measuring tube. During the pressure measurement and monitoring process of the pressure measuring tube, the filter assembly filters large particle impurities in the water entering the water inlet hole, reducing the cleaning of the blockage of the water inlet hole; at the same time, a temperature measuring unit is provided, and the temperature measuring unit can monitor the seepage condition by temperature measurement, so as to understand the seepage condition of the earth-rock dam in real time and facilitate the safe operation of the building.

[0022] 2. The present invention sets a lifting assembly, and the support ring supports the filter part and places it on the inner wall of the left end of the first tube body 1. The filtering operation is further performed through the filter part. When the filter part entering the first tube body is replaced and cleaned, the support ring is driven to move by the connecting rope, and the support ring drives the connecting column and the filter part to move out along the first tube body. By disassembling the nut, the threaded column is driven to detach from the support ring through the arc piece, so that the first filter net and geotextile can be removed and cleaned easily, which is convenient for workers to clean and improves the disassembly and cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the overall three-dimensional structure of the seepage monitoring device of the present invention;

[0024] Figure 2 It is a front cross-sectional structural schematic diagram of the seepage monitoring device of the present invention;

[0025] Figure 3 The whole of the seepage monitoring device of the present invention is Figure 1 A partial enlarged schematic diagram in the middle;

[0026] Figure 4 The whole of the seepage monitoring device of the present invention is Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 5 It is a schematic diagram of the connection structure between the support ring and the connection column of the seepage monitoring device of the present invention;

[0028] Figure 6 It is a schematic diagram of the top view connection structure of the support ring surface of the seepage monitoring device of the present invention.

[0029] In the figure:

[0030] 1. First tube body; 101. Water inlet hole; 102. Card slot; 2. Second tube body; 201. Fixed slot; 3. Limiting ring; 4. Limiting block; 5. Pull rope; 6. Spring; 7. Card block; 8. Connecting rope; 9. Support ring; 10. Threaded column; 11. Nut; 12. Geotextile; 13. First filter screen; 14. Fixed ring; 15. Second filter screen; 16. Threaded ring; 17. Connecting column; 18. Pressure sensor; 19. Sealing plate; 20. Flow detection module. DETAILED DESCRIPTION

[0031] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] As attached Figure 1 To Attachment Figure 6 As shown:

[0033] Embodiment 1: The present invention provides a seepage monitoring structure and construction method for an earth-rock dam, comprising a first tube body 1, the first tube body 1 being sleeved on the inner cavity of a second tube body 2, a water inlet hole 101 being opened on the left side surface of the first tube body 1, and a flow detection module 20 being installed on the inner wall of the water inlet hole 101; a limiting component, a limiting component for fixing the second tube body 2 being installed on the right side surface of the first tube body 1; a pulling component, the pulling component being installed in the inner cavity of the left end of the first tube body 1; a filtering component, the filtering component being detachably installed on the left end surface of the first tube body 1, and a flow detection module 20 being installed on the inner wall of the water inlet hole 101, the flow detection module comprising a temperature measuring unit, the temperature measuring unit can monitor the seepage situation by temperature measurement, so as to understand the seepage situation of the earth-rock dam in real time and facilitate the safe operation of the building, and utilize the heat taken away by the fluid passing through to change the temperature of the sensor, and calculate the flow by measuring the temperature change. Common ones include thermal conductivity flowmeters and thermal diffusion flowmeters (such as the MLX90614 infrared temperature measurement module, which is mainly used for temperature measurement, but the thermal effect principle behind it also involves the relationship between heat transfer and fluid velocity).

[0034] As can be seen from the above, the limit assembly is used for the fixed setting after the first tube body 1 and the second tube body 2 are adjusted. During the use of the pressure measuring tube for pressure monitoring, the filter assembly filters the water entering the water inlet hole 101 for large particles of impurities, thereby reducing the cleaning of the blockage of the water inlet hole 101. By setting the lifting assembly down, it is convenient to lift out the filter part, facilitate the disassembly, cleaning and replacement of the filter part, and meet the use requirements.

[0035] There are a plurality of water inlet holes 101 , which are evenly distributed on the left end side surface of the first tube body 1 .

[0036] As can be seen from the above, the water inlet holes 101 are evenly distributed on the left end surface of the first tube body 1 to facilitate water infiltration.

[0037] The lifting assembly includes a limiting ring 3, a limiting block 4, a connecting rope 8, a supporting ring 9, a connecting column 17 and a filter part. The limiting ring 3 is fixedly mounted on the inner wall of the right end of the second tube body 2. The connecting rope 8 runs through the inner cavity of the limiting ring 3. The limiting block 4 is slidably sleeved on the surface of the connecting rope 8. The other end of the connecting rope 8 is fixedly connected to the supporting ring 9. The side surface of the supporting ring 9 is fixedly connected to the connecting column 17. The side surface of the supporting ring 9 is provided with a detachable filter part, and the side surface of the connecting column 17 is installed with a pressure sensor 18.

[0038] As can be seen from the above, the support ring 9 stably supports the filter part and places it at the water inlet hole 101 inside the first tube body 1, and impurities in the water are filtered again through the filter part. During replacement and use, the fixedly connected support ring 9 is driven to move by the connecting rope 8, and the support ring 9 supports the filter part and places it on the inner wall of the left end of the first tube body 1, and the filtering operation is further performed through the filter part. When the filter part entering the first tube body 1 is replaced and cleaned, the limit ring 3 is driven to move by the connecting rope 8, and the limit ring 3 drives the connecting column 17 and the filter part to move out along the first tube body 1. By removing the nut 11 and driving the threaded column 10 to disengage the limit ring 3 through the arc piece, it is convenient to remove the first filter net 13 and the geotextile 12 for cleaning, which is convenient for workers to clean and improves the disassembly and cleaning efficiency.

[0039] There are two connecting ropes 8 , which are symmetrically arranged on the inner wall of the second tube body 2 .

[0040] As can be seen from the above, the connecting rope 8 is symmetrically arranged on the second tube body 2, which is convenient for the use of the connecting rope 8.

[0041] There are two support rings 9 , which are fixedly connected via a connecting column 17 . The filter portion connected to the outer side of the support ring 9 fits against the inner wall of the first tube body 1 , and the filter portion is disposed inside the first tube body 1 .

[0042] As can be seen from the above, the two support rings 9 are fixed by the connecting column 17 to ensure that the support rings 9 are stably placed. The support rings 9 support the filter part, thereby improving the stability of the placement of the filter part.

[0043] The filter part includes a threaded column 10, a nut 11, a geotextile 12 and a first filter screen 13. The geotextile 12 is sleeved on the outer surface of the limiting ring 3. The first filter screen 13 is arranged on the outer surface of the geotextile 12. An arc-shaped piece is embedded on the side surface of the first filter screen 13. The side surface of the arc-shaped piece is fixedly connected with the threaded column 10. The threaded column 10 passes through the first filter screen 13 and the side surface of the geotextile 12, and one end of the threaded column 10 passes through the limiting ring 3 and is threadedly sleeved with a nut 11.

[0044] As can be seen from the above, the arc-shaped sheet is attached to one side of the first filter screen 13, the threaded column 10 passes through the first filter screen 13 and the side surface of the geotextile 12, and the threaded column 10 is fixed by the nut 11 to fix the geotextile and the first filter screen 13, which is convenient for subsequent replacement and disassembly.

[0045] The limiting assembly includes a pull rope 5, a block 7 and a spring 6. The block 7 is arranged in a slot 102 opened on the side surface of the first tube body 1. The block 7 is elastically connected to the inner wall of the slot 102 through the spring 6. The side surface of the block 7 is fixedly connected to the limiting block 4 through the pull rope 5. The block 7 is engaged and connected with a fixed slot 201 opened on the inner wall of the second tube body 2. There are several fixed slots 201, and adjacent fixed slots 201 are equidistantly distributed on the inner wall of the second tube body 2.

[0046] As can be seen from the above, the limit block 4 drives the card block 7 to move into the card slot 102 through the fixedly connected pull rope 5, thereby moving the position of the second tube body 2. After the second tube body 2 moves to an appropriate length, the limit block 4 is released. Under the elastic action of the spring 6, the spring 6 pushes the card block 7 elastically connected on one side to engage with the fixed slot 201 opened on the inner wall of the second tube body 2, thereby improving the connection stability between the first tube body 1 and the second tube body 2.

[0047] The filter assembly includes a sealing plate 19, a threaded ring 16, a second filter screen 15 and a fixed ring 14. The sealing plate 19 is attached to the left end of the first tube body 1. The threaded ring 16 is fixedly installed on the right surface of the sealing plate 19. The threaded ring 16 is fixedly connected to the side surface of the fixed ring 14 through the second filter screen 15.

[0048] As can be seen from the above, the sealing plate 19 is attached to the left end of the first tube body 1, the fixing ring 14 drives the second filter screen 15 to be sleeved on the surface of the first tube body 1, and the sealing plate 19 is rotated, and the sealing plate 19 drives the threaded ring 16 to be threadedly connected to the left end of the first tube body 1, so as to ensure the overall fixation and stability of the filter assembly. At the same time, the impurities in the water entering the water inlet hole 101 on the left end surface of the first tube body 1 are filtered through the second filter screen 15 to avoid blockage of the water inlet hole 101.

[0049] The threaded ring 16 is threadedly sleeved on the left end surface of the first tube body 1 , the second filter screen 15 and the fixing ring 14 are slidably sleeved on the left end of the first tube body 1 , and the second filter screen 15 is sleeved on the outside of the water inlet hole 101 .

[0050] As can be seen from the above, the second filter screen 15 and the fixing ring 14 are conveniently arranged on the surface of the first tube body 1 for convenient filtering.

[0051] A construction method for a seepage monitoring structure of an earth-rock dam, the construction method comprising the following steps:

[0052] (i) The sealing plate 19 is attached to the left end of the first tube body 1, the fixing ring 14 drives the second filter screen 15 to be sleeved on the surface of the first tube body 1, and the sealing plate 19 is rotated, and the sealing plate 19 drives the threaded ring 16 to be threadedly connected to the left end of the first tube body 1, so as to ensure the overall fixation and stability of the filter assembly. At the same time, the second filter screen 15 filters the impurities of the water entering the water inlet hole 101 on the left end surface of the first tube body 1 to avoid the water inlet hole 101 from being blocked;

[0053] (ii) The support ring 9 supports and places the filter part on the inner wall of the left end of the first tube body 1, and further performs filtering operation through the filter part. When the filter part entering the first tube body 1 is replaced and cleaned, the support ring 9 is driven to move by the connecting rope 8, and the support ring 9 drives the connecting column 17 and the filter part to move out along the first tube body 1. By disassembling the nut 11, the arc-shaped piece drives the threaded column 10 to detach from the support ring 9, so that the first filter screen 13 and the geotextile 12 can be removed and cleaned, which is convenient for workers to clean and improves the disassembly and cleaning efficiency;

[0054] (III) According to the needs of the user, during use, the limit block 4 drives the clamping block 7 to move into the clamping groove 102 through the fixedly connected pull rope 5, thereby moving the position of the second tube body 2. After the second tube body 2 moves to an appropriate length, the limit block 4 is released. Under the elastic action of the spring 6, the spring 6 pushes the clamping block 7 elastically connected on one side to engage with the fixed groove 201 provided on the inner wall of the second tube body 2, thereby improving the connection stability between the first tube body 1 and the second tube body 2.

[0055] Working principle: fit the sealing plate 19 to the left end of the first tube body 1, the fixing ring 14 drives the second filter screen 15 to be sleeved on the surface of the first tube body 1, and rotate the sealing plate 19, the sealing plate 19 drives the threaded ring 16 to be threadedly connected to the left end of the first tube body 1, to ensure the overall fixation and stability of the filter assembly, and at the same time, the second filter screen 15 is used to filter impurities in the water entering the water inlet hole 101 on the left end surface of the first tube body 1 to avoid clogging of the water inlet hole 101, the support ring 9 supports the filter part and places it on the inner wall of the left end of the first tube body 1, and further performs filtering operations through the filter part, when the filter part entering the first tube body 1 is replaced and cleaned, the support ring 9 is driven to move by the connecting rope 8, and the support ring 9 The connecting column 17 and the filter part are driven to move out along the first tube body 1. By removing the nut 11, the threaded column 10 is driven to separate from the support ring 9 through the arc-shaped piece, so that the first filter screen 13 and the geotextile 12 can be removed and cleaned, which is convenient for workers to clean and improves the disassembly and cleaning efficiency. According to the needs of the user, during use, the limit block 4 drives the card block 7 to move into the card groove 102 through the fixedly connected pull rope 5, and moves the position of the second tube body 2. After the second tube body 2 moves to a suitable length, the limit block 4 is released. Under the elastic action of the spring 6, the spring 6 pushes the card block 7 elastically connected on one side to engage with the fixed groove 201 opened on the inner wall of the second tube body 2, thereby improving the connection stability between the first tube body 1 and the second tube body 2.

[0056] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A seepage monitoring structure for an earth-rock dam, characterized in that: It includes: A first tube body (1), the first tube body (1) being sleeved in the inner cavity of the second tube body (2), and a water inlet hole (101) being provided on the left end side surface of the first tube body (1); A limiting component, wherein a limiting component for fixing the second tube body (2) is installed on the right end side surface of the first tube body (1); A lifting assembly, the lifting assembly being installed in the inner cavity at the left end of the first tube body (1); A filter assembly is detachably mounted on the left end surface of the first tube body (1).

2. The earth-rock dam body seepage monitoring structure according to claim 1, characterized in that: The number of the water inlet holes (101) is multiple, and the multiple water inlet holes (101) are evenly distributed on the left end side surface of the first tube body (1).

3. The earth-rock dam body seepage monitoring structure according to claim 1, characterized in that: The lifting assembly comprises a limiting ring (3), a limiting block (4), a connecting rope (8), a supporting ring (9), a connecting column (17) and a filter portion. The limiting ring (3) is fixedly mounted on the inner wall of the right end of the second tube body (2). The connecting rope (8) passes through the inner cavity of the limiting ring (3). The surface of the connecting rope (8) is slidably sleeved on the limiting block (4). The other end of the connecting rope (8) is fixedly connected to the supporting ring (9). The side surface of the supporting ring (9) is fixedly connected to the connecting column (17). The side surface of the supporting ring (9) is provided with a detachable filter portion. The side surface of the connecting column (17) is installed with a pressure sensor (18).

4. The earth-rock dam body seepage monitoring structure according to claim 3, characterized in that: The number of the connecting ropes (8) is two, and the two connecting ropes (8) are symmetrically arranged on the inner wall of the second tube body (2).

5. The earth-rock dam body seepage monitoring structure according to claim 3, characterized in that: There are two support rings (9), and the two support rings (9) are fixedly connected via a connecting column (17). The filter portion connected to the outside of the support ring (9) is in contact with the inner wall of the first tube body (1), and the filter portion is arranged inside the first tube body (1).

6. The earth-rock dam body seepage monitoring structure according to claim 3, characterized in that: The filter portion comprises a threaded column (10), a nut (11), a geotextile (12) and a first filter screen (13); the geotextile (12) is sleeved on the outer surface of a limiting ring (3); the first filter screen (13) is arranged on the outer surface of the geotextile (12); an arc-shaped sheet is embedded on the side surface of the first filter screen (13); the side surface of the arc-shaped sheet is fixedly connected with a threaded column (10); the threaded column (10) passes through the first filter screen (13) and the side surface of the geotextile (12); and one end of the threaded column (10) that passes through the limiting ring (3) is threadedly sleeved with a nut (11).

7. The earth-rock dam body seepage monitoring structure according to claim 1, characterized in that: The limit assembly comprises a drawstring (5), a clamping block (7) and a spring (6); the clamping block (7) is arranged in a clamping groove (102) provided on the side surface of the first tube body (1); the clamping block (7) is elastically connected to the inner wall of the clamping groove (102) via the spring (6); the side surface of the clamping block (7) is fixedly connected to the limit block (4) via the drawstring (5); the clamping block (7) is clamped and connected to a fixed groove (201) provided on the inner wall of the second tube body (2); the number of the fixed grooves (201) is several, and adjacent fixed grooves (201) are equidistantly distributed on the inner wall of the second tube body (2).

8. The earth-rock dam body seepage monitoring structure according to claim 1, characterized in that: The filter assembly comprises a sealing plate (19), a threaded ring (16), a second filter screen (15) and a fixing ring (14); the sealing plate (19) is attached to the left end of the first tube body (1); a threaded ring (16) is fixedly mounted on the right side surface of the sealing plate (19); and the threaded ring (16) is fixedly connected to the side surface of the fixing ring (14) via the second filter screen (15).

9. A seepage monitoring structure for an earth-rock dam as claimed in claim 8, characterized in that: The threaded ring (16) is threadedly sleeved on the left end surface of the first tube body (1), the second filter screen (15) and the fixing ring (14) are slidably sleeved on the left end of the first tube body (1), and the second filter screen (15) is sleeved on the outside of the water inlet hole (101).

10. A construction method for a seepage monitoring structure for an earth-rock dam body, using the earth-rock dam body seepage monitoring structure according to any one of claims 1 to 9, characterized in that: The construction method comprises the following steps: (1) The sealing plate (19) is attached to the left end of the first tube body (1), the fixing ring (14) drives the second filter screen (15) to be sleeved on the surface of the first tube body (1), and the sealing plate (19) is rotated, so that the sealing plate (19) drives the threaded ring (16) to be threadedly connected to the left end of the first tube body (1), thereby ensuring the overall fixation and stability of the filter assembly, and at the same time, the water entering the water inlet hole (101) on the left end surface of the first tube body (1) is filtered for impurities through the second filter screen (15), thereby preventing the water inlet hole (101) from being blocked; (ii) The support ring (9) supports and places the filter part on the inner wall of the left end of the first tube body (1), and further performs filtering operation through the filter part. When the filter part enters the first tube body (1) for replacement and cleaning, the support ring (9) is driven to move by the connecting rope (8), and the support ring (9) drives the connecting column (17) and the filter part to move out along the first tube body (1). By disassembling the nut (11), the arc-shaped sheet drives the threaded column (10) to detach from the support ring (9), so that the first filter net (13) and the geotextile (12) can be removed and cleaned, which is convenient for workers to clean and improves the efficiency of disassembly and cleaning; (III) According to the needs of the user, during use, the limit block (4) drives the clamping block (7) to move into the clamping groove (102) through the fixedly connected pull rope (5), thereby moving the position of the second tube body (2). After the second tube body (2) moves to a suitable length, the limit block (4) is released. Under the elastic action of the spring (6), the spring (6) pushes the clamping block (7) elastically connected on one side to engage with the fixed groove (201) provided on the inner wall of the second tube body (2), thereby improving the stability of the connection between the first tube body (1) and the second tube body (2).

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