Clamping device for geosynthetic tensile testing

Abstract

The utility model relates to material tensile test technical field especially, it relates to a kind of clamping device for geosynthetic tensile test;Including tensile frame body and clamping component;Formed with containing cavity in tensile frame body;Clamping component is located inside containing cavity for clamping geosynthetic, including symmetrically arranged first clamping block and second clamping block;Tensile frame body has oppositely arranged first clamping part, second clamping part, the distance between the inner wall of first clamping part and second clamping part inner wall gradually decreases along the direction of inside containing cavity to outside, and tensile mouth is formed between first clamping part and second clamping part;With the gradual increase of tensile force in tensile test process, the pressure of first clamping block and second clamping block received by first clamping part and second clamping part gradually increases, the clamping force of geosynthetic gradually becomes big, only through clamping mode can realize the stable clamping of geosynthetic, reduce test operation step while avoiding geosynthetic slip.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing technology for materials, and in particular to a clamping device for tensile testing of geosynthetics. Background Technology

[0002] Widely used in retaining walls, slopes, and foundations, geosynthetics can serve as reinforcement and filtration systems. Tensile testing of geosynthetics is a core indicator for evaluating their engineering suitability, and the test results directly affect the design parameters of projects such as roadbed reinforcement and slope protection. Current testing methods (such as GB / T 15788) require that the specimen maintain absolute clamping stability during the tensile process.

[0003] Because the tensile test process is complex and involves many samples, the ability of the clamping device to prevent the geosynthetic material from slipping during the tensile performance test of geosynthetic materials is crucial to the success of the tensile test and the accuracy of the test results.

[0004] Chinese patent CN219737050U provides a clamping device for tensile testing of geosynthetics. The clamping force between the first and second clamping rods is adjusted by adjusting bolts. However, there is a problem of uneven distribution of clamping force. It is necessary to increase the number of adjusting bolts and wrap the material to be tested around the outer walls of the first and second clamping rods to prevent slippage. This makes the clamping device complex, increases the cost, and makes the tensile test operation steps cumbersome.

[0005] Therefore, it is very important to develop a clamping device that can prevent geosynthetics from slipping off during the stretching process. Utility Model Content

[0006] To address the shortcomings of the existing technology, this utility model provides a clamping device for tensile testing of geosynthetics that can solve the slippage problem and is easy to operate.

[0007] This utility model provides a clamping device for tensile testing of geosynthetics, comprising: A tension frame; the tension frame has an internal cavity that extends through the tension frame along its length, and a tension opening communicating with the cavity is formed on one side of the tension frame; A clamping assembly, located inside the receiving cavity, is used to clamp the geosynthetic material. The clamping assembly includes a first clamping block and a second clamping block arranged symmetrically. One end of the geosynthetic material is clamped between the first clamping block and the second clamping block, and the other end extends out from the stretching port. in, The stretching frame has a first clamping part and a second clamping part arranged opposite to each other. The distance between the inner wall of the first clamping part and the inner wall of the second clamping part gradually decreases along the direction from the inside of the receiving cavity to the outside. The stretching opening is formed between the first clamping part and the second clamping part. The first clamping part abuts against the first clamping block to prevent the first clamping block from disengaging from the stretching opening, and the second clamping part abuts against the second clamping block to prevent the second clamping block from disengaging from the stretching opening; when the first clamping part abuts against the first clamping block and the second clamping part abuts against the second clamping block, the first clamping part applies pressure in a relative direction to the first clamping block and the second clamping part applies pressure to the second clamping block to clamp the geosynthetic material.

[0008] In this technical solution, the distance between the inner walls of the first clamping part and the second clamping part at the tension opening gradually decreases. During the tensile test, the first clamping block and the second clamping block are pulled to the tension opening position by the geosynthetic material. The first clamping part applies pressure in opposite directions to the first clamping block and the second clamping part applies pressure in opposite directions to the second clamping block, clamping the geosynthetic material. At the same time, the first clamping part and the second clamping part restrict the first clamping block and the second clamping block from detaching from the tension opening, and the geosynthetic material cannot slip out between the first clamping block and the second clamping block, so there is no need to wrap the geotextile.

[0009] In some embodiments of this application, both the first clamping block and the second clamping block include a clamping portion, which is a wedge-shaped block structure, including a horizontally arranged clamping surface and an inclined surface arranged opposite to the clamping surface. The clamping surface is in contact with the surface of the geosynthetic material, and the inclined surface abuts against the inner wall of the first clamping block or the second clamping block.

[0010] In some embodiments of this application, a limiting guide opening is further formed between the first clamping part and the second clamping part. The limiting guide opening is located outside the stretching opening and is formed by the inner walls of the first clamping part and the second clamping part extending horizontally outward from the outer edge of the stretching opening. The limiting guide opening limits the first clamping block and the second clamping block and guides the geosynthetic material between the two clamping devices so that the geosynthetic material is subjected to a symmetrical tensile force when stretched.

[0011] In some embodiments of this application, the clamping surface is a wavy curved surface, a broken line surface, or a stepped curved surface; this increases the contact area between the geosynthetic material and the clamping surface, increases the friction between the two, and further prevents the geosynthetic material from being pulled off.

[0012] In some embodiments of this application, the two ends of the first clamping block and the second clamping block are fixed by fasteners, which further increases the clamping strength of the first clamping block and the second clamping block and ensures that the geosynthetic material will not be pulled off.

[0013] In some embodiments of this application, the first clamping block and the second clamping block have fixing portions extending outward along the length direction at both ends, and mounting holes are opened on the fixing portions. The fasteners pass through the mounting holes to fix the first clamping block and the second clamping block.

[0014] In some embodiments of this application, a scale is provided on the inclined surface along the length direction of the first clamping block or the second clamping block; this ensures that the clamping position of the first clamping block and the second clamping block is located at the center of the tension opening, and ensures that the geosynthetic material is subjected to uniform force during tension.

[0015] In some embodiments of this application, a connecting plate is provided at one end of the tension frame body away from the tension port, and a connecting hole is provided on the connecting plate to facilitate the connection of the tension frame body with the servo universal testing machine for tensile testing.

[0016] In some embodiments of this application, a reinforcing plate is provided between the connecting plate and the tension frame, which can improve the connection stability and strength between the connecting plate and the tension frame.

[0017] Based on the above technical solution, the clamping device for tensile testing of geosynthetics of this utility model has a gradually decreasing distance between the inner walls of the first clamping part and the second clamping part at the tensile opening position. When the geosynthetics is stretched, the first clamping part and the second clamping part apply pressure in opposite directions to the inclined surfaces of the first clamping block and the second clamping block respectively. As the tensile force gradually increases during the tensile test, the pressure on the first clamping block and the second clamping block from the first clamping part and the second clamping part gradually increases, and the clamping force on the geosynthetics gradually increases. Stable clamping of geosynthetics can be achieved by clamping alone, without the need for winding, reducing the number of test operation steps and preventing the geosynthetics from slipping. The interlocking surface is designed as a wavy, broken, or stepped surface, which increases the contact area between the geosynthetic material and the interlocking surface, increases the friction between the two, further prevents the geosynthetic material from being pulled off, and improves the accuracy and success rate of the tensile test. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1This is a three-dimensional structural diagram of the clamping device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the tension frame according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the first clamping block in an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the first clamping block, the second clamping block, and the fastener according to an embodiment of the present utility model; Figure 5 This is a cross-sectional schematic diagram of the clamping device according to an embodiment of the present utility model.

[0019] In the picture, 1. Tension frame; 2. Receiving cavity; 3. Clamping assembly; 4. Fasteners; 5. Connecting plate; 11. Stretching port; 12. First clamping part; 13. Second clamping part; 14. Limiting guide port; 31. First clamping block; 311. Clamping part; 312. Fixing part; 32. Second clamping block; 3111, Clamping surface; 3112, Inclined surface; 3121, Mounting hole; 41. Screw; 42. Nut; 51. Connecting hole. Detailed Implementation

[0020] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] As attached Figures 1-5 As shown, the clamping device for tensile testing of geosynthetics in this embodiment includes a tensile frame 1, a receiving cavity 2, and a clamping assembly 3.

[0025] Tensile frame 1 is connected to a servo universal testing machine. The two ends of the geosynthetic material are fixed on the two tensile frames 1 respectively, and then a tensile test is performed.

[0026] like Figure 2 As shown, the receiving cavity 2 is formed inside the tension frame 1, and the receiving cavity 2 penetrates the tension frame 1 in the length direction. A tension opening 11 communicating with the receiving cavity 2 is formed on one side of the tension frame 1.

[0027] The clamping assembly 3 is disposed inside the receiving cavity 2 and is used to clamp the geosynthetic material. The clamping assembly 3 includes a first clamping block 31 and a second clamping block 32 arranged symmetrically. One end of the geosynthetic material is clamped between the first clamping block 31 and the second clamping block 32, and the other end extends out from the stretching port 11.

[0028] It should be noted that during the tensile test, the geosynthetic material should first be clamped and fixed between the first clamp 31 and the second clamp 32, and then passed through one end of the receiving cavity 2 and out the other end. Therefore, the height of the receiving cavity 2 should be greater than the sum of the heights of the first clamp 31, the second clamp 32 and the geosynthetic material, so that the first clamp 31 and the second clamp 32 can be smoothly placed into the receiving cavity.

[0029] See also Figure 2 The stretching frame 1 has a first clamping part 12 and a second clamping part 13 arranged opposite to each other. The distance between the inner wall of the first clamping part 12 and the inner wall of the second clamping part 13 gradually decreases along the direction from the inside of the receiving cavity 2 to the outside. A stretching opening 11 is formed between the first clamping part 12 and the second clamping part 13. The first clamping part 12 abuts against the first clamping block 31 to prevent the first clamping block 31 from disengaging from the stretching opening 11, and the second clamping part 13 abuts against the second clamping block 32 to prevent the second clamping block 32 from disengaging from the stretching opening 11. When the first clamping part 12 abuts against the first clamping block 31 and the second clamping part 13 abuts against the second clamping block 32, the first clamping part 12 applies pressure in opposite directions to the first clamping block 31 and the second clamping part 13 applies pressure in opposite directions to clamp the geosynthetic material and prevent the geosynthetic material from slipping out between the first clamping block 31 and the second clamping block 32.

[0030] Specifically, as the diameter of the tension opening 11 gradually decreases along the direction close to the edge, the closer the first clamping block 31 and the second clamping block 32 are to the edge of the tension opening 11, the smaller the distance between them, and the greater the clamping force on the geosynthetic material, thus preventing the geosynthetic material from slipping out between the first clamping block 31 and the second clamping block 32.

[0031] In some embodiments, the first clamping block 31 and the second clamping block 32 have the same structure and are symmetrically arranged in the receiving cavity 2. After the first clamping block 31 and the second clamping block 32 are mated in the receiving cavity 2, they form a structure that adapts to the shape of the tension opening 11. After the geosynthetic material is clamped between the first clamping block 31 and the second clamping block 32, during the tensile test, the first clamping block 31 and the second clamping block 32 slide towards the outer edge of the tension opening 11. As the distance between the first clamping part 12 and the second clamping part 13 gradually decreases, when the first clamping block 31 and the second clamping block 32 slide to the first clamping part 12 respectively... When the inner wall of the first clamping block 31 and the second clamping block 32 abuts against the second clamping part 13, the first clamping block 31 and the second clamping block 32 no longer slide outward. As the tensile force gradually increases during the tensile test, the pressure applied by the first clamping part 12 and the second clamping part 13 to the first clamping block 31 and the second clamping block 32 also gradually increases, making the clamping force of the first clamping block 31 and the second clamping block 32 on the geosynthetic material also greater. The closer to the outer edge of the first clamping block 31 and the second clamping block 32, the greater the clamping force on the geosynthetic material. It is not necessary to wrap the outer wall of the first clamping block 31 and the second clamping block 32, which simplifies the test operation steps.

[0032] Specifically, the structure of the first clamping block 31 will be used as an example for explanation, such as... Figures 2-3 As shown, the first clamping block 31 includes a clamping part 311, which is a wedge-shaped block structure, including a horizontally arranged clamping surface 3111 and an inclined surface 3112 opposite to the clamping surface 3111. The inclination angle of the inclined surface 3112 matches the inner wall of the first clamping part 12.

[0033] The first clamping block 31 and the second clamping block 32 are symmetrical, with two clamping surfaces 3111 facing each other. The geosynthetic material is placed on one of the clamping surfaces 3111, and the other clamping surface is placed on top of the geosynthetic material to complete the clamping of the geosynthetic material.

[0034] It should be noted that the projections of the first clamping block 31 and the second clamping block 32 on the horizontal plane are rectangular, ensuring that they are straight in the length direction. This ensures that the material to be tested is subjected to balanced force during the stretching process, which helps to reduce testing errors and improve accuracy.

[0035] In some embodiments, in order to improve the clamping firmness of the first clamping block 31 and the second clamping block 32, both ends of the first clamping block 31 and the second clamping block 32 are connected and fixed by fasteners 4.

[0036] In some embodiments, the fastener 4 is a screw 41 and a nut 42, such as Figure 4 As shown, after the screw 41 passes through the first clamping block 31 and the second clamping block 32 from top to bottom, it is tightened by the nut 42 to fix the ends of the first clamping block 31 and the second clamping block 32, preventing the geosynthetic material from being pulled off from the ends of the first clamping block 31 and the second clamping block 32.

[0037] It should be noted that before conducting the tensile test, after clamping the geosynthetic material between the first clamping block 31 and the second clamping block 32, screws 41 and nuts 42 can be installed at both ends for fixation, pre-tightening the geosynthetic material, which facilitates the test operation.

[0038] In some embodiments, both ends of the first clamping block 31 and the second clamping block 32 have fixing portions 312 extending outward along the length direction. In the tensile test, the fixing portion 312 is the part of the first clamping block 31 that extends beyond the tensile opening 11, and its function is to install the fastener 4; Figure 2 As shown, in order to facilitate the installation of fastener 4, the upper surface of the fixing part 312 is flat, and its height is located at about half the position of the clamping part 311, so that the upper surface of the fixing part 312 has enough space. The fixing part 312 has a mounting hole 3121, which is a threaded hole. After the screw 41 of the fastener 4 passes through the two mounting holes 3121 in sequence, the nut 42 passes through the bottom of the screw 41 and is tightened, thus fixing the first clamping block 31 and the second clamping block 32 together.

[0039] In some embodiments, to ensure that the geosynthetic material experiences symmetrical tensile forces at both ends during stretching, a limiting guide opening 14 is formed between the first clamping portion 12 and the second clamping portion 13. The limiting guide opening 14 is located outside the stretching opening 11 and is formed by horizontally extending outward from the inner walls of the first clamping portion 12 and the second clamping portion 13 at the outer edge of the stretching opening 11. Figure 2As shown; that is, the diameter of the limiting guide port 14 is the same as the narrowest diameter of the tension port 11. During the tensile test, the first clamping block 31 and the second clamping block 32 are located inside the tension port 11 and will not detach from the tension port 11. However, when the front end size of the first clamping block 31 and the second clamping block 32 is small, some of the structure may protrude from the tension port 11. The limiting guide port 14 can limit and guide the structure of the first clamping block 31 and the second clamping block 32 that protrudes from the tension port, so as to prevent the first clamping block 31 and the second clamping block 32 from being pulled out. At the same time, it guides the geosynthetic material located outside the clamping part of the first clamping block 31 and the second clamping block 32, so that the geosynthetic material protrudes in the horizontal direction and is subjected to symmetrical tension in the horizontal direction, so as to accurately measure its tensile properties.

[0040] In some embodiments, to further prevent the geosynthetic material from being pulled out, the interlocking surface 3111 is curved; such as Figure 3 The clamping surface 3111 shown is a wavy curved surface. In other embodiments, the clamping surface 3111 can also be a broken surface or a stepped curved surface, which increases the contact area between the geosynthetic material and the clamping surface 3111, increases the friction between the clamping surface 3111 and the geosynthetic material, further reduces the failure rate of the test, and improves the accuracy and success rate.

[0041] In some embodiments, in order to increase the friction between the interlocking surface 3111 and the geosynthetic material, the interlocking surface 3111 may also be provided with anti-slip protrusions, which can also increase the contact area between the geosynthetic material and the interlocking surface 3111, increase the friction between the two, and prevent the geosynthetic material from slipping off.

[0042] It should be noted that the bottom surface of the fixing part 312 of the first clamping block 31 and the second clamping block 32 has the same structure as the clamping surface 3111, such as... Figure 3 As shown, since screws 41 and nuts 42 have a significant fastening effect on the geosynthetic material near their installation position, setting the bottom surface of the fixing part 312 to have the same structure as the clamping surface 3111 can ensure that the geosynthetic material within the range of the fixing part 312 is not pulled out.

[0043] In some embodiments, a scale (not shown in the figure) is provided on the inclined surface 3112 of the first clamping block 31 along its length direction; the second clamping block 32 has the same structure as the first clamping block 31, therefore, a scale is also provided on the inclined surface of the second clamping block 32 along its length direction, to ensure that the clamping position of the first clamping block 31 and the second clamping block 32 is located at the center of the tension opening 11, and to ensure that the geosynthetic material is subjected to uniform force during tension.

[0044] In some embodiments, such as Figure 5As shown, a connecting plate 5 is provided at one end of the tension frame 1 facing away from the tension port 11. The connecting plate 5 has a connecting hole 51. During the test, the connecting plate 5 facilitates the connection between the tension frame 1 and the servo universal testing machine to carry out the tensile test.

[0045] In some embodiments, a reinforcing plate is provided between the connecting plate 5 and the tension frame 1, which can improve the connection stability between the connecting plate 5 and the tension frame 1 and enhance its firmness.

[0046] During the tensile test, both ends of the geosynthetic material to be tested are fixed to the clamping device. First, one end of the geosynthetic material is placed between the two clamping surfaces of the first clamping block 31 and the second clamping block 32 to clamp the geosynthetic material. Then, screws 41 and nuts 42 are used to fix the first clamping block 31 and the second clamping block 32 together, achieving pre-clamping of the geosynthetic material without the need for winding. The other end of the geosynthetic material is similarly pre-clamped between another set of first clamping blocks 31 and second clamping blocks 32. The fixed first clamping blocks 31 and second clamping blocks 32 are placed into the receiving cavity 2 of the tensile frame 1. The two tensile frames 1 are connected to the servo universal testing machine via connecting plates 5. The first clamping block 31 is adjusted according to the scale on the inclined surface 3112. The clamping positions of clamping block 31 and second clamping block 32 are located in the center of the tensile frame 1 to ensure uniform force distribution. After starting the servo universal material testing machine, the first clamping block 31 and second clamping block 32 slide horizontally outward along the tensile opening 11 until they are locked in the tensile opening 11 and cannot slide further. As the tensile test proceeds, the tensile force gradually increases, and the pressure of the first clamping part 12 and the second clamping part 13 at the tensile opening 11 on the first clamping block 31 and second clamping block 32 also gradually increases. The clamping force between the two clamping surfaces also gradually increases until the test ends. The first clamping block 31 and second clamping block 32 are removed from one side, and the nut 42 and screw 41 are removed in sequence to complete the removal of the clamping device, which is convenient and quick.

[0047] Based on the above technical solution, the clamping device for tensile testing of geosynthetics of this utility model has a gradually decreasing distance between the inner walls of the first clamping part and the second clamping part at the tensile opening position. When the geosynthetics is stretched, the first clamping part and the second clamping part apply pressure in opposite directions to the inclined surfaces of the first clamping block and the second clamping block respectively. As the tensile force gradually increases during the tensile test, the pressure on the first clamping block and the second clamping block from the first clamping part and the second clamping part gradually increases, and the clamping force on the geosynthetics gradually increases. Stable clamping of geosynthetics can be achieved by clamping alone, without the need for winding, reducing the number of test operation steps and preventing the geosynthetics from slipping. The interlocking surface is designed as a wavy surface, a broken surface, or a stepped surface, which increases the contact area between the geosynthetic material and the interlocking surface, increases the friction between the two, further prevents the geosynthetic material from being pulled off, and improves the accuracy and success rate of the tensile test.

[0048] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0049] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A clamping device for tensile testing of geosynthetics, characterized in that: include: A tension frame body, wherein a receiving cavity is formed inside the tension frame body, the receiving cavity extends through the tension frame body along its length, and a tension opening communicating with the receiving cavity is formed on one side of the tension frame body; A clamping assembly, located inside the receiving cavity, is used to clamp the geosynthetic material. The clamping assembly includes a first clamping block and a second clamping block arranged symmetrically. One end of the geosynthetic material is clamped between the first clamping block and the second clamping block, and the other end extends out from the stretching port. in, The stretching frame has a first clamping part and a second clamping part arranged opposite to each other. The distance between the inner wall of the first clamping part and the inner wall of the second clamping part gradually decreases along the direction from the inside of the receiving cavity to the outside. The stretching opening is formed between the first clamping part and the second clamping part. The first clamping part abuts against the first clamping block to prevent the first clamping block from disengaging from the stretching opening, and the second clamping part abuts against the second clamping block to prevent the second clamping block from disengaging from the stretching opening; when the first clamping part abuts against the first clamping block and the second clamping part abuts against the second clamping block, the first clamping part applies pressure in a relative direction to the first clamping block and the second clamping part applies pressure to the second clamping block to clamp the geosynthetic material.

2. The clamping device for tensile testing of geosynthetics according to claim 1, characterized in that, Both the first clamping block and the second clamping block include a clamping portion, which is a wedge-shaped block structure, including a horizontally arranged clamping surface and an inclined surface arranged opposite to the clamping surface. The clamping surface is in contact with the surface of the geosynthetic material, and the inclined surface abuts against the inner wall of the first clamping block or the second clamping block.

3. The clamping device for tensile testing of geosynthetics according to claim 2, characterized in that, A limiting guide opening is also formed between the first clamping part and the second clamping part. The limiting guide opening is located outside the stretching opening and is formed by the inner walls of the first clamping part and the second clamping part extending horizontally outward from the outer edge of the stretching opening. The limiting guide opening limits the first clamping block and the second clamping block and guides the geosynthetic material between the two clamping devices.

4. The clamping device for tensile testing of geosynthetics according to claim 2, characterized in that, The clamping surface is a wavy surface, a broken surface, or a stepped surface.

5. The clamping device for tensile testing of geosynthetics according to claim 1, characterized in that, The two ends of the first clamping block and the second clamping block are fixed by fasteners.

6. The clamping device for tensile testing of geosynthetics according to claim 5, characterized in that, The first clamping block and the second clamping block have fixed portions extending outward along their length at both ends. The fixed portions have mounting holes, and the fasteners cooperate with the mounting holes to fix the first clamping block and the second clamping block.

7. The clamping device for tensile testing of geosynthetics according to claim 2, characterized in that, The inclined surface is provided with graduations.

8. The clamping device for tensile testing of geosynthetics according to claim 1, characterized in that, A connecting plate is provided at one end of the tension frame body that is away from the tension port, and a connecting hole is provided on the connecting plate.

9. The clamping device for tensile testing of geosynthetics according to claim 8, characterized in that, A reinforcing plate is provided between the connecting plate and the tension frame.

Images