Creep deformation detection equipment and geotechnical material creep deformation detection method

Abstract

The invention discloses creep deformation detection equipment and a geotechnical material creep deformation detection method, and relates to the field of creep deformation detection equipment. Soil filled in the movable clamping and positioning assembly is extruded through the shearing mechanism, so that the soil provides shearing force for the geotechnical material, then the tensile creep detection is performed on the geotechnical material through the tensile detection mechanism, and the creep performance detection precision of the geotechnical material can be improved by simulating the stress condition of the geotechnical material during use; the pull rope is wound through the winding assembly so as to adjust the pulling force of the pull rope on the movable clamping and positioning assembly and the geotechnical material until the pulling force reaches a preset value, the winding assembly stops winding the pull rope, and meanwhile, the rapid locking assembly rapidly limits and locks the winding assembly; and through cooperation of the winding assembly and the pull rope, real-time adjustment of the tensile force borne by the geotechnical material is facilitated, so that the geotechnical material is always in a constant tensile force state, and the creep property detection precision of the geotechnical material is improved.

Description

Technical Field

[0001] The present invention belongs to the field of creep detection equipment, and in particular, relates to a creep deformation detection device and a geotechnical material creep deformation detection method. Background Art

[0002] Geosynthetics are widely used in projects such as roads, railways, tunnels, bridges, and landfills due to their characteristics of soil consolidation, water conduction, and base reinforcement. Geosynthetics deform over time under constant loads and exhibit creep properties. Therefore, geosynthetics should have good anti-creep properties. Otherwise, under the action of long-term loads, if the material undergoes large deformation, the structure will lose stability, affecting its reinforcing role in the structure and may even cause the collapse of the engineering structure. In the prior art, creep performance testing of geosynthetics mostly involves applying a constant tensile force to both ends of the geosynthetics to test the creep performance of the geosynthetics. However, during the specific use of geosynthetics, in addition to being subjected to tensile forces, they are also subjected to shear forces from the soil, garbage piles, etc., which makes the creep value detection less accurate. Summary of the Invention

[0003] In response to the problems in the related art, the present invention proposes a creep deformation detection device and a geotechnical material creep deformation detection method to overcome the above technical problems existing in the existing related art.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention provides a creep deformation detection device, comprising a detection platform, on which a positioning mechanism, a shearing mechanism, and a tensile detection mechanism are mounted. The positioning mechanism comprises a fixed clamping and positioning assembly and a movable clamping and positioning assembly, each capable of clamping at two ends of a detection object, respectively. The movable clamping and positioning assembly is provided with a filling cavity capable of being filled with soil. The shearing mechanism is capable of squeezing the filled soil so that the soil provides a lateral shear force on the detection object. The tensile detection mechanism includes a pull rope, a displacement detection component, a winding component and a quick locking component. One end of the pull rope is connected to the mobile clamping and positioning component, and the other end of the pull rope is wound on the winding component. A tension sensor is connected and installed on the pull rope. The winding component can wind up the pull rope so that the pull rope provides a constant tension to the mobile clamping and positioning component and the detection object. The quick locking component can quickly limit and lock the winding component after the winding component completes winding. The displacement detection component can detect the displacement of the mobile clamping and positioning component.

[0005] Furthermore, the fixed clamping and positioning assembly includes a lower clamping seat and an upper clamping seat, the lower clamping seat is fixedly installed on the top surface of the detection platform, and the upper clamping seat is fixedly installed on the top surface of the lower clamping seat by bolts.

[0006] Furthermore, the movable clamping and positioning assembly includes a rolling support seat, which is fixedly installed on the top surface of the detection platform, a lower positioning box is placed on the top of the rolling support seat, and an upper positioning box is placed on the top of the lower positioning box. Both sides of the lower positioning box and the upper positioning box are provided with corresponding connecting seats, and the corresponding connecting seats are fixedly connected by bolts, and the outer ends of the lower positioning box and the upper positioning box are provided with clamping blocks, and the outer end of the lower positioning box is fixedly connected to the pull rope.

[0007] Furthermore, the shearing mechanism includes a sliding bracket and a pressure plate, the pressure plate is slidably mounted inside the upper positioning box, a pressure shaft is fixedly mounted on the top surface of the pressure plate, the upper end of the pressure shaft extends above the upper positioning box, and a pressure detector is fixedly mounted on the top end of the pressure shaft, and a pressure block is fixedly mounted on the top end of the pressure detector; The sliding bracket is slidably mounted on the top surface of the detection table. A threaded sleeve is fixedly mounted on the sliding bracket. A threaded rod is mounted on the internal thread of the threaded sleeve. The bottom end of the threaded rod is movably plugged into the top end of the pressing block.

[0008] Furthermore, the sliding bracket includes a slide rail, which is arranged on the top surface of the detection platform. A sliding seat is slidably installed in the slide rail, a support rod is fixedly installed on the sliding seat, a top frame is fixedly installed on the top of the support rod, and the threaded sleeve is fixedly installed on the top frame.

[0009] Furthermore, the displacement detection assembly includes a limit seat and a positioning rod, the limit seat is fixedly installed on the top surface of the detection platform, the positioning rod is fixedly installed on the side of the lower positioning box, and one end of the positioning rod is movably plugged into the limit seat, and a displacement sensor that can detect the displacement of the positioning rod is also fixedly installed on the limit seat.

[0010] Furthermore, the winding assembly includes a motor and multiple guide wheels. The motor is fixedly installed on the bottom surface of the testing platform. The output end of the motor is driven by a winding roller. The multiple guide wheels are rotatably installed on one side of the testing platform. The pull rope is limited and guided by the guide wheel and then wound on the winding roller.

[0011] Furthermore, the quick locking assembly includes a friction positioning ring and two brackets, the friction positioning ring is fixedly installed on one end of the winding roller, and the two brackets are respectively arranged on both sides of the friction positioning ring, and the top of the bracket is fixedly installed with a clamping base, and the inside of the clamping base is installed with an ejection clamping unit, and one end of the ejection clamping unit is fixedly installed with a clamping seat, and a two-way telescopic rod is fixedly installed between the two brackets, and the telescopic ends at both ends of the two-way telescopic rod are respectively connected to the ejection clamping units on both sides, and the ejection clamping unit can drive the clamping seat to eject and move toward the direction of the friction positioning ring under the transmission of the two-way telescopic rod, so that the two clamping seats cooperate to clamp and lock the friction positioning ring.

[0012] Furthermore, the ejection clamping unit includes a telescopic rod, an ejection rod and a limiting rod, the telescopic rod is slidably inserted into one end of the clamping base, one end of the telescopic rod extends to the outside of the clamping base and is fixedly installed with an end plate, the end plate is fixedly connected to the telescopic end of the bidirectional telescopic rod, the other end of the telescopic rod is slidably inserted into the ejection rod, the outer end of the ejection rod is fixedly connected to the clamping seat, a limiting cone is fixedly installed on the ejection rod, and one end of the ejection rod is sleeved with a locking spring abutting between the limiting cone and the telescopic rod; The limit rod is slidably inserted into the interior of the clamping base and is located on one side of the limit cone. One end of the limit rod is fixedly installed with a limit protrusion that can abut and limit the limit cone. The other end of the limit rod is abutted with a return spring. A guide inclined groove is provided on the limit rod, and a touch rod is fixedly installed on the end plate. One end of the touch rod is slidably inserted into the interior of the clamping base, and the inner end of the touch rod can slidably abut against the inner inclined surface of the guide inclined groove.

[0013] The present invention also discloses a method for detecting creep deformation of geotechnical materials, the specific steps of which are as follows: First, one end of the geotechnical material is clamped in a fixed clamping and positioning assembly, and then the other end of the geotechnical material is clamped in a movable clamping and positioning assembly, and the filling cavity inside the movable clamping and positioning assembly is filled with soil located at the top of the geotechnical material; Then, the filled soil is squeezed by the shearing mechanism, so that the soil provides a downward shear force to the geotechnical material. At the same time, the drawstring can be reeled in by the reeling assembly, so that the drawstring provides a pulling force to the mobile clamping and positioning assembly and the geotechnical material. The tension sensor detects the tension of the drawstring until the tension reaches a predetermined value. The reeling assembly stops reeling the drawstring, and the quick locking assembly quickly limits and locks the reeling assembly. When the geotechnical material creeps and deforms under the action of tension and shear force, the displacement detection component can determine the creep deformation of the geotechnical material by detecting the displacement of the mobile clamping and positioning component. At the same time, the tension sensor can detect the reduction of the tension on the pull rope, and then release the limit lock of the reeling component by the quick locking component, and repeat the above reeling and locking steps to keep the tension on the geotechnical material constant. Repeat the above-mentioned tension adjustment steps during creep deformation of the geotechnical material, and continue to perform creep testing on the geotechnical material to detect the creep deformation amount of the geotechnical material within a certain period of time.

[0014] The present invention has the following beneficial effects: 1. In the present invention, the soil filled in the movable clamping and positioning assembly is squeezed by a shearing mechanism, so that the soil provides shear force to the geotechnical material. The geotechnical material is then subjected to tensile creep testing by a tensile testing mechanism. By simulating the stress conditions of the geotechnical material during use, the creep performance testing accuracy of the geotechnical material can be improved.

[0015] 2. In the present invention, when the tension of the geotechnical material is adjusted, the drawstring is reeled in by the reeling assembly to adjust the tension of the drawstring on the movable clamping and positioning assembly and the geotechnical material, and at the same time, the tension sensor detects the tension of the drawstring until the tension reaches a predetermined value, the reeling assembly stops reeling in the drawstring, and at the same time, the quick locking assembly quickly limits and locks the reeling assembly; through the cooperation of the reeling assembly and the drawstring, it is convenient to adjust the tension of the geotechnical material in real time, so that the geotechnical material is always in a constant tension state, and the quick locking assembly can lock the reeling assembly immediately when the reeling assembly stops reeling, preventing the reeling assembly from being unwound due to the reverse tension of the drawstring and the geotechnical material, thereby affecting the tension of the drawstring and the geotechnical material, and improving the tension accuracy of the geotechnical material, thereby improving the creep performance detection accuracy of the geotechnical material.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, they can also obtain drawings based on these drawings without paying any creative work.

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of the creep deformation detection device of the present invention; Figure 2 For the present invention Figure 1 A local enlarged structural diagram of point A; Figure 3 This is the second schematic diagram of the three-dimensional structure of the creep deformation detection device of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at point B; Figure 5 This is the third schematic diagram of the three-dimensional structure of the creep deformation detection device of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged structure at point C; Figure 7 This is the fourth schematic diagram of the three-dimensional structure of the creep deformation detection device of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at D; Figure 9 This is the fifth schematic diagram of the three-dimensional structure of the creep deformation detection device of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the local enlarged structure at E.

[0019] In the figure: 1. Testing table; 2. Positioning mechanism; 21. Lower positioning box; 22. Upper positioning box; 23. Connecting seat; 24. Rolling support seat; 25. Lower clamping seat; 26. Upper clamping seat; 27. Clamping block; 3. Shearing mechanism; 31. Slide rail; 32. Sliding seat; 33. Support rod; 34. Top frame; 35. Threaded sleeve; 36. Threaded rod; 37. Pressing block; 38. Pressure detector; 39. Pressure shaft; 310. Pressing plate; 4. Tensile testing mechanism; 41. Pull rope; 42. Tension sensor; 43. Limit seat; 44. Positioning rod; 45. Displacement sensor; 46. Guide wheel; 47. Motor; 48. Winding roller; 49. Friction positioning ring; 410. Clamp seat; 411. Bracket; 412. Bidirectional telescopic rod; 413. Clamping base; 414. Telescopic rod; 416. End plate; 417. Locking spring; 418. Limit cone; 419. Ejection rod; 420. Touch rod; 421. Guide chute; 422. Limit rod; 423. Return spring; 424. Limit bump. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0021] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0022] Example 1

[0023] See also Figures 1-6 As shown, the present invention is a creep deformation detection device, including a detection platform 1, on which a positioning mechanism 2, a shearing mechanism 3 and a tensile detection mechanism 4 are installed. The positioning mechanism 2 includes a fixed clamping positioning component and a mobile clamping positioning component. The fixed clamping positioning component and the mobile clamping positioning component can be clamped at both ends of the detection object respectively, and the interior of the mobile clamping positioning component is provided with a filling cavity that can be filled with soil. The shearing mechanism 3 can squeeze the filled soil so that the soil provides lateral shear force to the detection object; the tensile detection mechanism Structure 4 includes a pull rope 41, a displacement detection component, a winding component and a quick locking component. One end of the pull rope 41 is connected to the mobile clamping and positioning component, and the other end of the pull rope 41 is wound on the winding component. A tension sensor 42 is connected and installed on the pull rope 41. The winding component can wind up the pull rope 41 so that the pull rope 41 provides a constant tension to the mobile clamping and positioning component and the detection object. The quick locking component can quickly limit and lock the winding component after the winding component completes winding. The displacement detection component can detect the displacement of the mobile clamping and positioning component.

[0024] When creep testing is performed on geotechnical materials, one end of the geotechnical material is first clamped in the fixed clamping and positioning assembly, and the other end of the geotechnical material is clamped in the mobile clamping and positioning assembly, and the filling cavity inside the mobile clamping and positioning assembly is filled with soil located at the top of the geotechnical material; then the filled soil is squeezed by the shearing mechanism 3, so that the soil provides a downward shear force to the geotechnical material, and at the same time, the pull rope 41 can be reeled in by the reeling assembly, so that the pull rope 41 provides tension to the mobile clamping and positioning assembly and the geotechnical material, and the tension sensor 42 detects the tension of the pull rope 41 until the tension reaches a predetermined value, and the reeling assembly is turned on. The component stops reeling in the drawstring 41, and the quick locking component quickly limits and locks the reeling component; when the geotechnical material creeps and deforms under the action of tension and shear force, the displacement detection component can determine the creep deformation of the geotechnical material by detecting the displacement of the mobile clamping and positioning component, and the tension sensor 42 can detect that the tension on the drawstring 41 is reduced, and then the quick locking component releases the limit lock on the reeling component, and repeats the above reeling and locking steps to keep the tension on the geotechnical material constant; this reciprocating process continuously performs creep detection on the geotechnical material to detect the creep deformation of the geotechnical material within a certain period of time.

[0025] Among them, the soil can be squeezed to provide shear force to the geotechnical material, thereby simulating the stress conditions of the geotechnical material during use, and improving the creep performance detection accuracy of the geotechnical material; through the cooperation of the winding component, the pull rope 41 and the tension sensor 42, it is convenient to adjust the tension exerted on the geotechnical material in real time, so that the geotechnical material is always in a constant tension state, and the quick locking component can lock the winding component immediately when it stops winding, preventing the winding component from being unwound due to the reverse tension of the pull rope 41 and the geotechnical material, thereby affecting the tension exerted on the pull rope 41 and the geotechnical material, and improving the tension accuracy exerted on the geotechnical material, thereby improving the creep performance detection accuracy of the geotechnical material.

[0026] Example 2

[0027] See also Figure 1-Figure 4 As shown, the difference between this embodiment and the above embodiment is that the fixed clamping and positioning assembly includes a lower clamping seat 25 and an upper clamping seat 26, the lower clamping seat 25 is fixedly installed on the top surface of the detection platform 1, and the upper clamping seat 26 is fixedly installed on the top surface of the lower clamping seat 25 by bolts; the movable clamping and positioning assembly includes a rolling support seat 24, the rolling support seat 24 is fixedly installed on the top surface of the detection platform 1, the lower positioning box 21 is placed on the top of the rolling support seat 24, and the upper positioning box 22 is placed on the top of the lower positioning box 21, and corresponding connecting seats 23 are provided on both sides of the lower positioning box 21 and the upper positioning box 22, and the corresponding connecting seats 23 are fixedly connected by bolts, and the outer ends of the lower positioning box 21 and the upper positioning box 22 are provided with clamping blocks 27, and the outer end of the lower positioning box 21 is fixedly connected to the pull rope 41.

[0028] During testing, one end of the geotechnical material is clamped between the lower clamping seat 25 and the upper clamping seat 26, and the lower clamping seat 25 and the upper clamping seat 26 are locked and fixed by bolts. Then, the other end of the geotechnical material is clamped between the clamping blocks 27 at the ends of the lower positioning box 21 and the upper positioning box 22, and the upper and lower connecting seats 23 are locked and fixed by bolts, so that the lower positioning box 21 and the upper positioning box 22 are firmly connected and the geotechnical material is tightened. Then, when the pull rope 41 pulls the lower positioning box 21, the lower positioning box 21 moves forward on the rolling support seat 24, and cooperates with the upper positioning box 22 to gradually tighten the geotechnical material to provide tension to the geotechnical material.

[0029] Example 3

[0030] See also Figure 1 、 Figure 2 、 Figure 7 、 Figure 8As shown, the difference between this embodiment and the above embodiment is that the shearing mechanism 3 includes a sliding bracket and a pressure plate 310, the pressure plate 310 is slidably installed in the interior of the upper positioning box 22, and a pressure shaft 39 is fixedly installed on the top surface of the pressure plate 310, the upper end of the pressure shaft 39 extends above the upper positioning box 22, and a pressure detector 38 is fixedly installed on the top of the pressure shaft 39, and a pressure block 37 is fixedly installed on the top of the pressure detector 38; the sliding bracket is slidably installed on the top surface of the detection platform 1, and a threaded sleeve 35 is fixedly installed on the sliding bracket, and a threaded rod 36 is installed on the internal thread transmission of the threaded sleeve 35, and the bottom end of the threaded rod 36 is movably inserted into the top of the pressure block 37; the sliding bracket includes a slide rail 31, the slide rail 31 is arranged on the top surface of the detection platform 1, a sliding seat 32 is slidably installed in the slide rail 31, a support rod 33 is fixedly installed on the sliding seat 32, a top frame 34 is fixedly installed on the top of the support rod 33, and the threaded sleeve 35 is fixedly installed on the top frame 34.

[0031] Among them, the interior of the upper positioning box 22 is filled with soil located between the geotechnical material and the pressure plate 310. The top of the threaded rod 36 is provided with an inner hexagonal hole. During the inspection, the threaded rod 36 is rotated by the wrench and the inner hexagonal hole to gradually move the threaded rod 36 downward, and the pressure block 37, the pressure detector 38, the pressure shaft 39 and the pressure plate 310 are squeezed downward. At this time, the pressure plate 310 squeezes the soil in the upper positioning box 22 downward, so that the soil provides shear force to the geotechnical material. At the same time, the pressure detector 38 detects the magnitude of the shear force, thereby facilitating the inspection of the geotechnical material. The shear force of the material is regulated. When the geotechnical material is deformed during the detection process, the lower positioning box 21 and the upper positioning box 22 move under the pull of the pull rope 41, and the threaded rod 36, the pressure block 37, the pressure detector 38, the pressure shaft 39 and the pressure plate 310 move synchronously with the upper positioning box 22. At the same time, the threaded rod 36 drives the sliding bracket to slide synchronously along the detection platform 1, so that the sliding bracket maintains the limiting support for the threaded rod 36, thereby ensuring that the geotechnical material is always subjected to a stable shear force during the detection process, thereby improving the creep detection accuracy of the creep material.

[0032] Example 4

[0033] See also Figure 3-Figure 6 As shown, the difference between this embodiment and the above embodiment is that the displacement detection component includes a limit seat 43 and a positioning rod 44, the limit seat 43 is fixedly installed on the top surface of the detection platform 1, the positioning rod 44 is fixedly installed on the side of the lower positioning box 21, and one end of the positioning rod 44 is movably plugged into the limit seat 43, and a displacement sensor 45 that can detect the displacement of the positioning rod 44 is also fixedly installed on the limit seat 43; the winding component includes a motor 47 and multiple guide wheels 46, the motor 47 is fixedly installed on the bottom surface of the detection platform 1, and the output end of the motor 47 is driven by a winding roller 48, and the multiple guide wheels 46 are all rotatably installed on one side of the detection platform 1, and the pull rope 41 is wound on the winding roller 48 after being limited and guided by the guide wheel 46.

[0034] When it is necessary to test the pulling of the geotechnical material, the motor 47 drives the winding roller 48 to rotate and reel in the pull rope 41, thereby pulling the lower positioning box 21 and the geotechnical material through the pull rope 41, and the motor 47 adopts a stepping motor, which can rotate at a small angle, and then drives the winding roller 48 to rotate at a small angle to pull and reel the pull rope 41, thereby realizing precise adjustment of the tension of the pull rope 41. When the geotechnical material creeps and elongates under the action of tension, the lower positioning box 21 moves forward under the tension of the pull rope 41. At this time, the lower positioning box 21 drives the positioning rod 44 to move synchronously, and then the displacement sensor 45 detects the displacement of the positioning rod 44, thereby measuring the creep elongation of the geotechnical material. The cooperation between the positioning rod 44 and the displacement sensor 45 makes the creep detection of the geotechnical material more convenient, and the positioning rod 44 can cooperate with the limit seat 43 to limit the lower positioning box 21, so that the lower positioning box 21 is installed more stably on the rolling support seat 24.

[0035] Example 5

[0036] See also Figure 5 、 Figure 6 、 Figure 9 、 Figure 10 As shown, the difference between this embodiment and the above embodiment is that the quick locking assembly includes a friction positioning ring 49 and two brackets 411. The friction positioning ring 49 is fixedly installed at one end of the winding roller 48. The two brackets 411 are respectively arranged on both sides of the friction positioning ring 49. The top of the bracket 411 is fixedly installed with a clamping base 413, and the inside of the clamping base 413 is installed with an ejection clamping unit. One end of the ejection clamping unit is fixedly installed with a clamping seat 410. A two-way telescopic rod 412 is fixedly installed between the two brackets 411. The telescopic ends at both ends of the two-way telescopic rod 412 are respectively connected to the ejection clamping units on both sides. The ejection clamping unit can drive the clamping seat 410 to eject and move toward the direction of the friction positioning ring 49 under the transmission of the two-way telescopic rod 412, so that the two clamping seats 410 cooperate to clamp and lock the friction positioning ring 49.

[0037] When the winding roller 48 rotates to complete the tension adjustment of the pull rope 41, the bidirectional telescopic rod 412 drives the telescopic ends on both sides to contract, thereby triggering the ejection clamping unit, so that the ejection clamping units on both sides synchronously drive the clamping seat 410 to eject toward the friction positioning ring 49, so that the clamping seats 410 on both sides quickly close to clamp and lock the friction positioning ring 49, thereby realizing the rapid locking and fixation of the winding roller 48, preventing the winding roller 48 from rotating in the opposite direction and unwinding under the reverse tension of the geotechnical material and the pull rope 41, which causes the tension of the pull rope 41 to decrease, which is beneficial to improving the accuracy of the tension of the pull rope 41, and thereby improving the creep detection accuracy of the geotechnical material.

[0038] Furthermore, the ejection clamping unit includes a telescopic rod 414, an ejection rod 419 and a limit rod 422. The telescopic rod 414 is slidably inserted into one end of the clamping base 413. One end of the telescopic rod 414 extends to the outside of the clamping base 413 and is fixedly installed with an end plate 416. The end plate 416 is fixedly connected to the telescopic end of the two-way telescopic rod 412. The other end of the telescopic rod 414 is slidably inserted with an ejection rod 419. The outer end of the ejection rod 419 is fixedly connected to the clamping seat 410. A limit cone 418 is fixedly installed on the ejection rod 419. One end of the ejection rod 419 is sleeved with a member that abuts against the limit cone 418 and The locking spring 417 is provided between the telescopic rods 414; the limiting rod 422 is slidably inserted into the interior of the clamping base 413 and is located on one side of the limiting cone 418. One end of the limiting rod 422 is fixedly installed with a limiting protrusion 424 that can abut and limit the limiting cone 418. The other end of the limiting rod 422 is abutted with a return spring 423. A guide inclined groove 421 is provided on the limiting rod 422, and a touch rod 420 is fixedly installed on the end plate 416. One end of the touch rod 420 is slidably inserted into the interior of the clamping base 413, and the inner end of the touch rod 420 can slide against the inner inclined surface of the guide inclined groove 421.

[0039] When the winding roller 48 rotates to adjust the tension of the pull rope 41, the two-way telescopic rod 412 contracts, driving the end plate 416, the telescopic rod 414 and the touch rod 420 to move toward the clamping base 413. At this time, the telescopic rod 414 presses the locking spring 417 against the contraction, so that the locking spring 417 is in a state of storing force. Then the two-way telescopic rod 412 stops contracting. When it is necessary to lock the winding roller 48, the two-way telescopic rod 412 continues to contract, driving the end plate 416, the telescopic rod 414 and the touch rod 420 to continue to move toward the clamping base 413. The inner end of the contact rod 420 slides against the inclined surface of the guide inclined groove 421, and moves the limiting rod 422 downward, so that the limiting rod 422 drives the limiting protrusion 424 to move downward to release the abutment limit on the limiting cone 418. Then, the limiting cone 418, the ejection rod 419 and the clamping seat 410 are ejected toward the friction positioning ring 49 under the elastic force of the locking spring 417, so that the clamping seat 410 quickly clamps and fixes the friction positioning ring 49, thereby realizing the rapid locking and fixation of the winding roller 48. Among them, the telescopic rod 414 is provided with a telescopic slot, and a telescopic block connected to the end of the ejection rod 419 is slidably installed in the telescopic slot. When the pull rope 41 needs to be reeled in again, the bidirectional telescopic rod 412 extends to drive the end plate 416, the telescopic rod 414 and the touch rod 420 to move back in the direction away from the clamping base 413, so that the telescopic rod 414 gradually relaxes its contact with the locking spring 417. Then, as the telescopic rod 414 continues to move outward, the telescopic rod 414 The internal telescopic block drives the limiting cone 418, the ejection rod 419 and the clamping seat 410 to move outward and reset to release the lock on the winding roller 48, and the limiting cone 418 can move the limiting protrusion 424 and the limiting rod 422 downward through the left conical surface, so that the limiting cone 418 can be reset to the left side of the limiting protrusion 424, so that the limiting protrusion 424 can continue to limit the limiting cone 418, thereby facilitating the next round of ejection locking.

[0040] Example 6

[0041] This embodiment discloses a method for detecting creep deformation of geotechnical materials, and the specific steps are as follows: First, one end of the geotechnical material is clamped in a fixed clamping and positioning assembly, and then the other end of the geotechnical material is clamped in a movable clamping and positioning assembly, and the filling cavity inside the movable clamping and positioning assembly is filled with soil located at the top of the geotechnical material; Then, the shearing mechanism 3 squeezes the filled soil, causing the soil to provide a downward shear force on the geotechnical material. At the same time, the reeling assembly can reel in the drawstring 41, causing the drawstring 41 to provide a pulling force on the mobile clamping and positioning assembly and the geotechnical material. The tension sensor 42 detects the tension of the drawstring 41. When the tension reaches a predetermined value, the reeling assembly stops reeling the drawstring 41, and the quick locking assembly quickly limits and locks the reeling assembly. When the geotechnical material creeps and deforms under the action of tension and shear force, the displacement detection assembly can determine the creep deformation of the geotechnical material by detecting the displacement of the movable clamping and positioning assembly. At the same time, the tension sensor 42 can detect the reduction of the tension on the pull rope 41. Then, the quick locking assembly releases the limit lock on the winding assembly, and the above winding and locking steps are repeated to keep the tension on the geotechnical material constant. Repeat the above-mentioned tension adjustment steps during creep deformation of the geotechnical material, and continue to perform creep testing on the geotechnical material to detect the creep deformation amount of the geotechnical material within a certain period of time.

[0042] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] The preferred embodiments of the invention disclosed above are intended only to help illustrate the invention. These preferred embodiments do not exhaust all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A creep deformation detection device, comprising a detection platform, characterized in that: The testing platform is equipped with a positioning mechanism, a shearing mechanism, and a tensile testing mechanism. The positioning mechanism includes a fixed clamping and positioning assembly and a movable clamping and positioning assembly. The fixed clamping and positioning assembly and the movable clamping and positioning assembly can be clamped at both ends of the testing object respectively. The movable clamping and positioning assembly is provided with a filling cavity that can be filled with soil. The shearing mechanism can squeeze the filled soil so that the soil provides lateral shear force on the testing object. The tensile detection mechanism includes a pull rope, a displacement detection component, a winding component and a quick locking component. One end of the pull rope is connected to the mobile clamping and positioning component, and the other end of the pull rope is wound on the winding component. A tension sensor is connected and installed on the pull rope. The winding component can wind up the pull rope so that the pull rope provides a constant tension to the mobile clamping and positioning component and the detection object. The quick locking component can quickly limit and lock the winding component after the winding component completes winding. The displacement detection component can detect the displacement of the mobile clamping and positioning component.

2. The creep deformation detection device according to claim 1, characterized in that: The fixed clamping and positioning assembly includes a lower clamping seat and an upper clamping seat. The lower clamping seat is fixedly installed on the top surface of the detection platform, and the upper clamping seat is fixedly installed on the top surface of the lower clamping seat by bolts.

3. The creep deformation detection device according to claim 1, characterized in that: The movable clamping and positioning assembly includes a rolling support seat, which is fixedly installed on the top surface of the detection table. A lower positioning box is placed on the top of the rolling support seat, and an upper positioning box is placed on the top of the lower positioning box. Both sides of the lower positioning box and the upper positioning box are provided with corresponding connecting seats, and the corresponding connecting seats are fixedly connected by bolts. The outer ends of the lower positioning box and the upper positioning box are provided with clamping blocks, and the outer end of the lower positioning box is fixedly connected to the pull rope.

4. The creep deformation detection device according to claim 3, characterized in that: The shearing mechanism includes a sliding bracket and a pressure plate, the pressure plate is slidably mounted inside the upper positioning box, a pressure shaft is fixedly mounted on the top surface of the pressure plate, the upper end of the pressure shaft extends above the upper positioning box, and a pressure detector is fixedly mounted on the top end of the pressure shaft, and a pressure block is fixedly mounted on the top end of the pressure detector; The sliding bracket is slidably mounted on the top surface of the detection table. A threaded sleeve is fixedly mounted on the sliding bracket. A threaded rod is mounted on the internal thread of the threaded sleeve. The bottom end of the threaded rod is movably plugged into the top end of the pressing block.

5. The creep deformation detection device according to claim 4, characterized in that: The sliding bracket includes a slide rail, which is arranged on the top surface of the detection platform. A sliding seat is slidably installed in the slide rail, a support rod is fixedly installed on the sliding seat, a top frame is fixedly installed on the top of the support rod, and the threaded sleeve is fixedly installed on the top frame.

6. The creep deformation detection device according to claim 3, characterized in that: The displacement detection assembly includes a limit seat and a positioning rod. The limit seat is fixedly installed on the top surface of the detection platform, and the positioning rod is fixedly installed on the side of the lower positioning box. One end of the positioning rod is movably plugged into the limit seat. A displacement sensor that can detect the displacement of the positioning rod is also fixedly installed on the limit seat.

7. The creep deformation detection device according to claim 1, characterized in that: The winding assembly includes a motor and multiple guide wheels. The motor is fixedly installed on the bottom surface of the detection platform. The output end of the motor is driven by a winding roller. The multiple guide wheels are rotatably installed on one side of the detection platform. The pull rope is limited and guided by the guide wheel and then wound on the winding roller.

8. The creep deformation detection device according to claim 7, characterized in that: The quick locking assembly includes a friction positioning ring and two brackets, the friction positioning ring is fixedly installed at one end of the winding roller, and the two brackets are respectively arranged on both sides of the friction positioning ring, the top of the bracket is fixedly installed with a clamping base, the interior of the clamping base is installed with an ejection clamping unit, one end of the ejection clamping unit is fixedly installed with a clamping seat, and a two-way telescopic rod is fixedly installed between the two brackets, the telescopic ends at both ends of the two-way telescopic rod are respectively connected to the ejection clamping units on both sides, and the ejection clamping unit can drive the clamping seat to eject and move toward the direction of the friction positioning ring under the transmission of the two-way telescopic rod, so that the two clamping seats cooperate to clamp and lock the friction positioning ring.

9. The creep deformation detection device according to claim 8, characterized in that: The ejection clamping unit includes a telescopic rod, an ejection rod and a limiting rod, the telescopic rod is slidably inserted into one end of the clamping base, one end of the telescopic rod extends to the outside of the clamping base and is fixedly installed with an end plate, the end plate is fixedly connected to the telescopic end of the bidirectional telescopic rod, the other end of the telescopic rod is slidably inserted into the ejection rod, the outer end of the ejection rod is fixedly connected to the clamping seat, a limiting cone is fixedly installed on the ejection rod, and one end of the ejection rod is sleeved with a locking spring abutting between the limiting cone and the telescopic rod; The limit rod is slidably inserted into the interior of the clamping base and is located on one side of the limit cone. One end of the limit rod is fixedly installed with a limit protrusion that can abut and limit the limit cone. The other end of the limit rod is abutted with a return spring. A guide inclined groove is provided on the limit rod, and a touch rod is fixedly installed on the end plate. One end of the touch rod is slidably inserted into the interior of the clamping base, and the inner end of the touch rod can slidably abut against the inner inclined surface of the guide inclined groove.

10. A method for detecting creep deformation of geotechnical materials, using the creep deformation detection device according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: First, one end of the geotechnical material is clamped in a fixed clamping and positioning assembly, and then the other end of the geotechnical material is clamped in a movable clamping and positioning assembly, and the filling cavity inside the movable clamping and positioning assembly is filled with soil located at the top of the geotechnical material; Then, the filled soil is squeezed by the shearing mechanism, so that the soil provides a downward shear force to the geotechnical material. At the same time, the drawstring can be reeled in by the reeling assembly, so that the drawstring provides a pulling force to the mobile clamping and positioning assembly and the geotechnical material. The tension sensor detects the tension of the drawstring until the tension reaches a predetermined value. The reeling assembly stops reeling the drawstring, and the quick locking assembly quickly limits and locks the reeling assembly. When the geotechnical material creeps and deforms under the action of tension and shear force, the displacement detection component can determine the creep deformation of the geotechnical material by detecting the displacement of the mobile clamping and positioning component. At the same time, the tension sensor can detect the reduction of the tension on the pull rope, and then release the limit lock of the reeling component by the quick locking component, and repeat the above reeling and locking steps to keep the tension on the geotechnical material constant. Repeat the above-mentioned tension adjustment steps during creep deformation of the geotechnical material, and continue to perform creep testing on the geotechnical material to detect the creep deformation amount of the geotechnical material within a certain period of time.

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