A permeameter for detecting the anti-penetration of geotextiles

Abstract

The present invention discloses a permeameter for detecting the anti-penetration of geotextiles, comprising a cabinet body, a laboratory table fixedly connected to the top of the cabinet body, a clamping mechanism provided on the outer side of the laboratory table, a testing mechanism fixedly connected to the output end of the cylinder, a water storage frame fixedly connected to the top of the testing table for use with a large testing port and a small testing port, and at least one ultraviolet lamp fixedly connected to the outer side of the water storage frame; a plurality of test modes are formed by the mutual correlation and coordination relationship among the clamping mechanism, the testing mechanism, the ultraviolet lamp and the water storage frame, and different modes are selected and regulated according to experimental requirements, thereby simulating different factors affecting the permeability performance of geotextiles; while changing a single variable, different test areas in the same experiment can also form a control experiment with each other, so that the experimenter can better understand which factors affect the permeability performance of the geotextile through experimental data.

Description

Technical Field

[0001] The invention relates to the technical field of geotextiles, in particular to a permeameter for detecting the anti-penetration of geotextiles. Background Art

[0002] Geotextiles, also known as geotextiles, are permeable geosynthetics made from synthetic fibers that are needle-punched or woven. Geotextile permeability is a key hydraulic characteristic of geotextiles and a crucial factor in filtration standards and other hydraulic design requirements. The excellent permeability and filtration properties of geotextiles can improve seepage within buildings and enhance their stability, so geotextiles must comply with industry standards.

[0003] The permeability of geotextiles during use is not only related to their own materials, but also affected by the application environment, mainly including the degree of deformation of the geotextile after being subjected to external pressure, water pressure, temperature and ultraviolet radiation. The existing geotextile testing permeameters only change the water pressure to observe the permeability of the geotextile. Simply changing the water pressure cannot simulate the permeability of the geotextile in actual use. In addition, when testing the permeability of geotextiles, there is no control experiment in the same group of experiments, and an additional control experiment needs to be set up. If the control experiment is not performed in the same experimental environment, it will not only waste testing time but also lead to inaccurate control experiments.

[0004] Therefore, a permeameter for detecting the anti-penetration of geotextiles is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a permeameter for detecting the anti-penetration of geotextiles, so as to solve the problem raised in the above background technology that it is impossible to simultaneously simulate the deformation degree of the geotextile after being subjected to external pressure, water pressure, temperature and the changes in its permeability after ultraviolet irradiation.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a permeameter for detecting the penetration resistance of geotextiles, comprising a cabinet and a control console fixedly connected to the top of the cabinet, a laboratory table fixedly connected to the top of the cabinet, a clamping mechanism for clamping a geotextile body and controlling the tension of the geotextile body provided on the outside of the laboratory table, the clamping mechanism comprising a driving assembly and a clamping assembly;

[0007] The top of the cabinet is fixedly connected to a support column, the top of the support column is fixedly connected to a support platform, the top of the support platform is fixedly connected to a cylinder, the output end of the cylinder is fixedly connected to a testing mechanism for detecting the geotextile body, the testing mechanism includes a mounting cylinder fixedly connected to the output end of the cylinder, the outer side of the mounting cylinder is integrally connected to a testing cylinder, the bottom of the testing cylinder is fixedly connected to a large testing port and at least one small testing port, the small testing port is located on the outside of the inside of the testing cylinder and is fixedly connected to a pressure frame, the small testing port is located on the outside of the outside of the testing cylinder and is fixedly connected to a limiting plate, a spring is fixedly connected between the limiting plate and the testing cylinder, a socket is provided inside the small testing port, and a latch is plugged into the inside of the socket;

[0008] The top of the experimental table is fixedly connected to a test table, the top of the test table is fixedly connected to a water storage frame for use with a large test port and a small test port, and the outer side of the water storage frame is fixedly connected to at least one ultraviolet lamp.

[0009] Preferably: a water storage barrel is provided under the cabinet, a water inlet is provided on the outside of the water storage barrel, a water pump is fixedly installed on the top of the water storage barrel, the water inlet of the water pump is connected to the water storage barrel through a pipe, and the water outlet of the water pump is connected to the installation cylinder through a connecting pipe.

[0010] Preferably, a placement slot is provided inside the experimental table.

[0011] Preferably: the driving assembly includes a servo motor, a bidirectional lead screw and a driving block, the servo motor is fixedly connected to the outside of the experimental table, the bidirectional lead screw is fixedly connected to the output end of the servo motor, and the bidirectional lead screw is arranged inside the placement groove, there are two driving blocks, the driving block on one side is connected to the positive thread groove on the bidirectional lead screw through a ball nut pair, and the driving block on the other side is connected to the reverse thread groove on the bidirectional lead screw through a ball nut pair.

[0012] Preferably, there are two groups of clamping assemblies, both groups of clamping assemblies include a first clamping plate, a second clamping plate and a fixing bolt, one group of clamping assemblies is fixedly connected to the driving block on one side, and the other group of clamping assemblies is fixedly connected to the driving block on the other side.

[0013] Preferably: anti-slip grooves are provided on the corresponding sides of the first clamping plate and the second clamping plate, connecting grooves are provided at both ends of the first clamping plate, threaded holes are provided at both ends of the second clamping plate, the lower end of the fixing bolt is not threaded, the fixing bolt is threadedly connected to the second clamping plate through the outer thread and the threaded hole on the second clamping plate, and the lower end of the fixing bolt is rotationally limited and connected to the connecting groove on the first clamping plate.

[0014] Preferably: there are six small test ports, there are six ultraviolet lamps, the six small test ports are distributed along the outer side of the large test port at equal distances, there are seven water storage frames, the six water storage frames are distributed along the outer side of the water storage frame at the middle position at equal distances, the large test port cooperates with the water storage frame at the middle position, and the six small test ports cooperate with the six water storage frames at the outer side respectively.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, the geotextile body is clamped by the second clamping plate and the first clamping plate, and the rotation direction and number of turns of the servo motor are controlled when it is started. The two groups of first clamping plates and second clamping plates are driven to move closer to or away from each other by the bidirectional screw and the drive block, thereby simulating the two states of the geotextile body after being stretched and not stretched, as well as the specific tension after the geotextile body is stretched.

[0017] 2. In the present invention, the test mechanism is pushed to contact the geotextile body by controlling the air cylinder. At this time, the large test port and the small test port will respectively contact and fit with their corresponding water storage frames, thereby clamping the geotextile body of the to-be-tested portion under the corresponding test platform. At the same time, when the large test port and the small test port fit together, an independent test space will be formed between the upper and lower corresponding large test port, small test port and water storage frame. Penetration tests can be performed on different positions on the same geotextile body, and control experiments can be formed between them, which is convenient for testers to observe and test different positions on the same geotextile body.

[0018] 3. In the present invention, since the three ultraviolet lamps are distributed along one side of the water storage frame, as shown in the experimental bench, the water storage frame located near the middle position of the three ultraviolet lamps and on the outside is most affected by the ultraviolet rays, and the water storage frames located on both sides of the three ultraviolet lamps and on the outside are less affected by the ultraviolet rays than the water storage frame in the middle position. Therefore, when other test conditions are the same, there is no need to adjust the ultraviolet lamps, and the geotextile body in the independent detection space formed between the upper and lower corresponding large test ports and small test ports and the water storage frame can form a mutual control experiment.

[0019] 4. In the present invention, regardless of whether the geotextile body is in a stretched state during testing, the pins on the three small test ports close to the ultraviolet lamp on one side can be pulled out. At this time, water drives the unrestricted small test ports to move down and squeeze on the geotextile body through the squeezing frame, thereby simulating the situation where the geotextile body is subjected to greater force at a certain position during actual use, and as the permeability test continues, the water inside the installation tube will gradually decrease, making the pressure of the unrestricted small test ports on the geotextile body smaller and smaller, simulating the situation where the geotextile body is rained on or sprinkled with water, and as the water on the geotextile body evaporates, the pressure of the water on the geotextile body on the geotextile body becomes smaller and smaller. When the above situation occurs, the restricted small test ports will not have any additional pressure on the geotextile body. At this time, a control experiment will be formed between the restricted small test ports and the unrestricted small test ports, which can facilitate the experimenter to observe the permeability of the geotextile body.

[0020] In summary, through the interrelated and coordinated relationship between the clamping mechanism, the testing mechanism, the ultraviolet lamp and the water storage frame, a variety of test modes are formed. Different modes can be selected and adjusted according to the experimental requirements, and then the different factors affecting the permeability of the geotextile are simulated. At the same time, while changing a single variable, different test areas in the same experiment can also form a control experiment with each other, so that the experimenters can better understand what factors affect the permeability of the geotextile through experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the working state of the overall structure of the present invention after clamping the geotextile;

[0022] Figure 2 This is a schematic diagram of the working state of the overall structure of the present invention without clamping the geotextile;

[0023] Figure 3 A perspective view of the external structure of the present invention from another perspective;

[0024] Figure 4 This is a schematic diagram of the connection structure of the test bench, water storage frame and ultraviolet lamp of the present invention;

[0025] Figure 5 An exploded view of the connection state of the parts in the clamping mechanism of the present invention;

[0026] Figure 6 Schematic diagram of the cross-sectional structure of the experimental platform of the present invention;

[0027] Figure 7 Schematic diagram of the connection structure between the cylinder and the testing mechanism of the present invention;

[0028] Figure 8 A three-dimensional diagram of the connection status of various parts in the testing mechanism of the present invention;

[0029] Figure 9 It is a cross-sectional schematic diagram showing the connection status of various parts in the testing mechanism of the present invention.

[0030] In the picture:

[0031] 1. Cabinet; 2. Console;

[0032] 3. Water storage tank; 31. Water pump; 32. Connecting pipe;

[0033] 4. Experimental table; 41. Placement slot;

[0034] 5. Support platform; 51. Support column;

[0035] 6. Cylinder;

[0036] 7. Clamping mechanism; 71. Servo motor; 72. Bidirectional screw; 73. Drive block; 74. First clamping plate; 75. Second clamping plate; 76. Fixing bolt;

[0037] 8. Test mechanism; 81. Mounting cylinder; 82. Test cylinder; 83. Large test port; 84. Small test port; 85. Press frame; 86. Socket; 87. Latch; 88. Limit plate; 89. Spring;

[0038] 9. Test bench; 10. Geotextile body; 11. Water storage frame; 12. Ultraviolet lamp. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figures 1 to 9 The present invention provides a technical solution for a geotextile anti-penetration tester:

[0041] A geotextile anti-penetration tester includes a cabinet 1 and a console 2 fixedly connected to the top of the cabinet 1. A test bench 4 is fixedly connected to the top of the cabinet 1. A clamping mechanism 7 for clamping a geotextile body 10 and controlling the tension of the geotextile body 10 is provided on the outside of the test bench 4. The clamping mechanism 7 includes a drive assembly and a clamping assembly.

[0042] The top of the cabinet 1 is fixedly connected to a support column 51, the top of the support column 51 is fixedly connected to a support platform 5, the top of the support platform 5 is fixedly connected to a cylinder 6, the output end of the cylinder 6 is fixedly connected to a testing mechanism 8 for detecting the geotextile body 10, the testing mechanism 8 includes a mounting cylinder 81 fixedly connected to the output end of the cylinder 6, the outer side of the mounting cylinder 81 is integrally connected to a testing cylinder 82, the bottom of the testing cylinder 82 is fixedly connected to a large testing port 83 and at least one small testing port 84, the small testing port 84 is located on the outside of the inside of the testing cylinder 82 and is fixedly connected to a pressure frame 85, the small testing port 84 is located on the outside of the outside of the testing cylinder 82 and is fixedly connected to a limit plate 88, a spring 89 is fixedly connected between the limit plate 88 and the testing cylinder 82, a socket 86 is provided inside the small testing port 84, and a latch 87 is inserted into the socket 86;

[0043] A test bench 9 is fixedly connected to the top of the experimental table 4. A water storage frame 11 for use with the large test port 83 and the small test port 84 is fixedly connected to the top of the test table 9. At least one ultraviolet lamp 12 is fixedly connected to the outside of the water storage frame 11.

[0044] During operation, according to the experimental requirements, the pins 87 on the three small test ports 84 near the ultraviolet lamp 12 on one side can be pulled out. At this time, the small test ports 84 are no longer restricted, so the water inside the installation tube 81 drives the small test ports 84 that are not restricted to move downward by squeezing the pressure frame 85. After the small test ports 84 move downward, they will squeeze on the geotextile body 10, thereby simulating the situation where a certain position of the geotextile body 10 is subjected to greater force during actual use. As the infiltration experiment continues, the water inside the installation tube 81 will gradually decrease. At this time, the pressure of the water on the pressure frame 85 will become smaller and smaller. At the same time, as the spring 89 is reset, , which will make the pressure of the unrestricted small test port 84 on the geotextile body 10 smaller and smaller. This can also simulate the situation that after the geotextile body 10 is rained on or sprinkled with water, as the water on the geotextile body 10 evaporates, the pressure of the water on the geotextile body 10 on the geotextile body 10 becomes smaller and smaller. At the same time, during the above operation, the restricted small test port 84 will not have any additional pressure on the geotextile body 10. At this time, a control experiment will be formed between the restricted small test port 84 and the unrestricted small test port 84, which can facilitate the experimenter to observe the permeability of the geotextile body 10.

[0045] As an embodiment of the present invention, Figure 2 、 Figure 3 and Figure 7 As shown, a water storage barrel 3 is provided at the bottom of the cabinet 1, a water inlet is provided on the outside of the water storage barrel 3, a water pump 31 is fixedly installed on the top of the water storage barrel 3, the water inlet of the water pump 31 is connected with the water storage barrel 3 through a pipe, and the water outlet of the water pump 31 is connected with the installation tube 81 through a connecting pipe 32.

[0046] During operation, the water storage barrel 3 can be replenished with water through the water inlet. By setting up a water pump 31 and a connecting pipe 32, the water in the water storage barrel 3 can be transported to the inside of the installation cylinder 81 according to a certain gravity according to experimental requirements.

[0047] As an embodiment of the present invention, Figures 1 to 6 As shown, a placement slot 41 is provided inside the experimental table 4, and a driving assembly includes a servo motor 71, a bidirectional lead screw 72 and a driving block 73. The servo motor 71 is fixedly connected to the outside of the experimental table 4, and the bidirectional lead screw 72 is fixedly connected to the output end of the servo motor 71, and the bidirectional lead screw 72 is arranged inside the placement slot 41. There are two driving blocks 73, one side driving block 73 is connected to the positive thread groove on the bidirectional lead screw 72 through a ball nut pair, and the other side driving block 73 is connected to the reverse thread groove on the bidirectional lead screw 72 through a ball nut pair. There are two groups of clamping assemblies, and both groups of clamping assemblies include a first clamping plate 74, a second clamping plate 75 and a second clamping plate 76. Two clamping plates 75 and fixing bolts 76, one group of clamping components is fixedly connected to the driving block 73 on one side, and the other group of clamping components is fixedly connected to the driving block 73 on the other side. Anti-slip grooves are provided on the corresponding sides of the first clamping plate 74 and the second clamping plate 75. Connecting grooves are provided at both ends of the first clamping plate 74, and threaded holes are provided at both ends of the second clamping plate 75. The lower end of the fixing bolt 76 is not threaded. The fixing bolt 76 is threadedly connected to the second clamping plate 75 through the outer thread and the threaded hole on the second clamping plate 75. The lower end of the fixing bolt 76 is rotationally limited and connected to the connecting groove on the first clamping plate 74.

[0048] During operation, the geotextile body 10 is placed between the second clamping plate 75 and the first clamping plate 74. After rotating the fixing bolt 76, the geotextile body 10 is clamped by the second clamping plate 75 and the first clamping plate 74, and the rotation direction of the servo motor 71 is controlled when it is started. The two groups of first clamping plates 74 and second clamping plates 75 are driven to move closer to or away from each other through the bidirectional screw 72 and the drive block 73, thereby simulating the two states of the geotextile body 10 being stretched and not stretched. The specific tension of the geotextile body 10 after being stretched can also be controlled by controlling the number of rotations of the servo motor 71.

[0049] As an embodiment of the present invention, Figure 4 、 Figure 7 、 Figure 8 and Figure 9 As shown, there are six small test ports 84 and six ultraviolet lamps 12. The six small test ports 84 are distributed equidistantly along the outer circumference of the large test port 83. There are seven water storage frames 11. The six water storage frames 11 are distributed equidistantly along the outer circumference of the middle water storage frame 11. The large test port 83 cooperates with the middle water storage frame 11, and the six small test ports 84 cooperate with the six outer water storage frames 11 respectively.

[0050] During operation, the test mechanism 8 is pushed into contact with the geotextile body 10 by controlling the air cylinder 6. At this time, the large test port 83 and the small test port 84 are respectively in contact with and fitted to the corresponding water storage frame 11, so that an independent testing space is formed between the upper and lower corresponding large test port 83, the small test port 84 and the water storage frame 11. In this way, permeability tests can be conducted on different positions on the same geotextile body 10, and a comparative experiment can be formed between them.

[0051] Turn on the ultraviolet lamp 12. Since the three ultraviolet lamps 12 are distributed along one side of the water storage frame 11, Figure 4 As shown, the water storage frame 11 located near the middle position of the three ultraviolet lamps 12 and on the outside is most affected by the ultraviolet rays, and the water storage frames 11 located on both sides of the three ultraviolet lamps 12 and on the outside are less affected by the ultraviolet rays than the water storage frame 11 in the middle position. Therefore, under the same other test conditions, there is no need to adjust the ultraviolet lamps 12, and the geotextile body 10 in the independent testing space formed between the upper and lower corresponding large test ports 83 and small test ports 84 and the water storage frame 11 can form a mutual control experiment;

[0052] After the experiment is finished, the permeability of the geotextile body 10 can be clearly known by observing the water content in the corresponding water storage frame 11 .

[0053] Working principle: When working, first rotate the fixing bolt 76 to separate the second clamping plate 75 from the first clamping plate 74, then place the geotextile body 10 between the second clamping plate 75 and the first clamping plate 74, then reversely rotate the fixing bolt 76 to clamp the geotextile body 10 through the second clamping plate 75 and the first clamping plate 74, and control the rotation direction of the servo motor 71 when it is started. After the servo motor 71 is started, it will drive the two groups of first clamping plates 74 and second clamping plates 75 to move closer to or away from each other through the bidirectional screw 72 and the drive block 73, thereby simulating the two states of the geotextile body 10 being stretched and not stretched. After the adjustment is completed, turn off the servo motor 71;

[0054] After the servo motor 71 is turned off, the cylinder 6 is controlled to work. After the cylinder 6 works, it pushes the testing mechanism 8 to contact the geotextile body 10. At this time, the large test port 83 and the small test port 84 will respectively contact and fit with their corresponding water storage frames 11, thereby clamping the geotextile body 10 at the part to be tested under the corresponding testing platform. At the same time, when the large test port 83 and the small test port 84 are fitted together, an independent testing space will be formed between the large test port 83 and the small test port 84 corresponding to each other above and below and the water storage frame 11, so that the penetration test can be carried out on different positions on the same geotextile body 10, and a control experiment can be formed between them, which is convenient for the test personnel to observe the different positions on the same geotextile body 10.

[0055] Turn on the ultraviolet lamp 12. Since the three ultraviolet lamps 12 are distributed along one side of the water storage frame 11, as shown in the experimental table 4, the water storage frame 11 located near the middle position of the three ultraviolet lamps 12 and on the outside is most affected by the ultraviolet rays, and the water storage frames 11 located on both sides of the three ultraviolet lamps 12 and on the outside are less affected by the ultraviolet rays than the water storage frame 11 in the middle. Therefore, under the same other test conditions, there is no need to adjust the ultraviolet lamp 12, and the geotextile body 10 in the independent testing space formed between the upper and lower corresponding large test port 83, the small test port 84 and the water storage frame 11 can form a mutual control experiment;

[0056] When the geotextile body 10 is stretched or not stretched, and regardless of whether the geotextile body 10 is in a stretched state during testing, the pins 87 on the three small test ports 84 near the ultraviolet lamp 12 on one side can be pulled out. At this time, the small test ports 84 are no longer restricted, and then the water inside the installation tube 81 will pass through the squeezing frame 85. Since the three small test ports 84 are no longer restricted, the water drives the unrestricted small test ports 84 to move downward through the squeezing frame 85. After moving downward, the small test ports 84 will be squeezed on the geotextile body 10, thereby simulating the situation where a certain position of the geotextile body 10 is subjected to greater force during actual use, and as the infiltration experiment continues, the water inside the installation tube 81 will gradually At this time, the pressure of water on the pressure frame 85 will become smaller and smaller. At the same time, as the spring 89 is reset, the pressure of the small test port 84 that is not limited on the geotextile body 10 will become smaller and smaller. This can also simulate the situation that after the geotextile body 10 is rained on or sprinkled with water, as the water on the geotextile body 10 evaporates, the pressure of the water on the geotextile body 10 on the geotextile body 10 becomes smaller and smaller. At the same time, when the above situation occurs, the limited small test port 84 will not have any additional pressure on the geotextile body 10. At this time, a control experiment will be formed between the limited small test port 84 and the unrestricted small test port 84, which can facilitate the experimenter to observe the permeability of the geotextile body 10.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A permeameter for detecting the penetration resistance of geotextiles, comprising a cabinet and a console fixedly connected to the top of the cabinet, a laboratory table fixedly connected to the top of the cabinet, a support column fixedly connected to the top of the cabinet, a support table fixedly connected to the top of the support column, and a cylinder fixedly connected to the top of the support table, characterized in that: A clamping mechanism is provided on the outside of the test bench and is used to clamp the geotextile body and control the tension of the geotextile body, wherein the clamping mechanism includes a driving assembly and a clamping assembly; The testing mechanism is fixedly mounted on the output end of the cylinder and is used to detect the geotextile body. The testing mechanism includes a mounting tube fixedly connected to the output end of the cylinder, a testing tube being integrally connected to the outer side of the mounting tube, a large testing port and at least one small testing port being fixedly connected to the bottom of the testing tube, the small testing port being located on the outer side of the interior of the testing tube and being fixedly connected to a pressure frame, the small testing port being located on the outer side of the exterior of the testing tube and being fixedly connected to a limiting plate, a spring being fixedly connected between the limiting plate and the testing tube, a socket being provided inside the small testing port, a latch being plugged inside the socket, and as the permeation test continues, the water inside the mounting tube will gradually decrease, at which time the pressure of the water on the pressure frame will become smaller and smaller, and at the same time, as the spring is reset, the pressure of the small testing port that is not limited on the geotextile body will become smaller and smaller, which can also simulate the situation that after the geotextile body is rained on or sprinkled with water, as the water on the geotextile body evaporates, the pressure of the water on the geotextile body on the geotextile body becomes smaller and smaller; The top of the experimental table is fixedly connected to a test table, the top of the test table is fixedly connected to a water storage frame for use with a large test port and a small test port, and the outer side of the water storage frame is fixedly connected to at least one ultraviolet lamp; There are six small test ports and six ultraviolet lamps, and the six small test ports are distributed equidistantly along the outer circumference of the large test port. There are seven water storage frames, and the six water storage frames are distributed equidistantly along the outer circumference of the water storage frame in the middle position. The large test port cooperates with the water storage frame in the middle position, and the six small test ports cooperate with the six water storage frames on the outer side respectively.

2. The geotextile anti-penetration tester according to claim 1, characterized in that: A water storage barrel is provided below the cabinet, a water inlet is provided on the outside of the water storage barrel, a water pump is fixedly installed on the top of the water storage barrel, the water inlet of the water pump is connected to the water storage barrel through a pipe, and the water outlet of the water pump is connected to the installation cylinder through a connecting pipe.

3. The geotextile anti-penetration tester according to claim 1, characterized in that: A placement slot is provided inside the experimental table.

4. The geotextile anti-penetration tester according to claim 3, characterized in that: The driving assembly includes a servo motor, a bidirectional lead screw and a driving block. The servo motor is fixedly connected to the outside of the experimental table, the bidirectional lead screw is fixedly connected to the output end of the servo motor, and the bidirectional lead screw is arranged inside the placement groove. There are two driving blocks. The driving block on one side is connected to the positive thread groove on the bidirectional lead screw through a ball nut pair, and the driving block on the other side is connected to the reverse thread groove on the bidirectional lead screw through a ball nut pair.

5. The permeameter for detecting the anti-penetration of geotextile according to claim 4, characterized in that: There are two groups of clamping assemblies, and both groups of clamping assemblies include a first clamping plate, a second clamping plate and a fixing bolt. One group of clamping assemblies is fixedly connected to the driving block on one side, and the other group of clamping assemblies is fixedly connected to the driving block on the other side.

6. The permeameter for detecting the anti-penetration of geotextile according to claim 5, characterized in that: Anti-slip grooves are provided on the corresponding sides of the first clamping plate and the second clamping plate, connecting grooves are provided at both ends of the first clamping plate, and threaded holes are provided at both ends of the second clamping plate. The lower end of the fixing bolt is not threaded, and the fixing bolt is threadedly connected to the second clamping plate through the outer thread and the threaded hole on the second clamping plate. The lower end of the fixing bolt is rotationally limited and connected to the connecting groove on the first clamping plate.

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