Method and device for shearing and stretching between high polymer and soil body

Abstract

The invention relates to the technical field of geotechnical engineering, in particular to a shearing and stretching method and device between a high polymer and a soil mass, the shearing and stretching device comprises a placing frame, two shearing mold fixing pieces and two stretching mold fixing pieces, the two shearing loading mechanism fixing pieces are connected with a shearing loading mechanism through two first fixing screws, and the two stretching mold fixing pieces are connected with a stretching mold through two second fixing screws. The two stretching loading mechanism fixing pieces are connected with the stretching loading mechanism through two second fixing screws, the placing frame is arranged on the two shearing mold fixing pieces, the placing frame is used for placing a test piece, and the placing frame is also matched with the two stretching loading mechanism fixing pieces; in this way, the technical problems that in the prior art, a shearing and stretching method device is limited in fixing effect, poor in adaptability, complex in operation and lack of real-time analysis capacity are solved.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering, and in particular to a shearing and stretching method and device between a polymer and soil. Background Art

[0002] Polymer-soil composites play a vital role in engineering fields such as soil reinforcement and foundation treatment due to their excellent mechanical properties and wide application potential. The performance evaluation of such composites, especially the shear and tensile properties, is crucial to ensure their reliability and safety in practical applications.

[0003] However, the existing shear and tensile test devices have significant shortcomings: in traditional devices, the upper panel, lower panel and side panels are designed as one, which limits the fixation effect of the specimen in the shear test and cannot meet the needs of the tensile test. In addition, it is difficult for the existing devices to meet the requirements of shear and tensile tests at the same time, and different equipment needs to be designed separately, which not only increases the test cost, but also increases the complexity of operation. More importantly, the existing devices lack the ability to combine digital image correlation technology (DIC) to observe and analyze the specimen destruction process in real time.

[0004] In summary, the existing shearing and stretching method devices have the problems of limited fixation effect, poor adaptability, complex operation and lack of real-time analysis capabilities. Summary of the invention

[0005] The purpose of the present invention is to provide a shear and stretching method and device between a polymer and soil, aiming to solve the technical problems of the shear and stretching method and device in the prior art, such as limited fixing effect, poor adaptability, complex operation and lack of real-time analysis capability.

[0006] To achieve the above-mentioned purpose, the present invention adopts a shear and stretching method and device between a polymer and a soil body, comprising a placement frame, two shearing mold fixings and two stretching mold fixings, the two shearing loading mechanism fixings are connected to the shearing loading mechanism through two first fixing screws, the two stretching loading mechanism fixings are connected to the stretching loading mechanism through two second fixing screws, the placement frame is arranged on the two shearing mold fixings, the placement frame is used to place the test piece, and the placement frame is also adapted to the two stretching loading mechanism fixings.

[0007] Among them, the placement frame includes two upper cover plates, two side plates and two lower cover plates, the upper cover plates are connected to the corresponding shear loading mechanism fixing parts, the lower cover plates and the side plates are also connected to the corresponding shear loading mechanism fixing parts, the two upper cover plates, the two side plates and the two lower cover plates enclose a placement cavity for the specimen, and the upper cover plates and the lower cover plates are respectively detachably connected to the corresponding side plates.

[0008] Wherein, the test piece placed in the placement cavity is a polymer-soil composite material.

[0009] The present invention also provides a shearing and stretching method between a polymer and soil, which is applied to the shearing and stretching device between a polymer and soil as described above. The steps include: Step 1: firstly, using two upper cover plates, two side plates and two lower cover plates to enclose a specimen placement cavity, and placing the specimen in the placement cavity; Step 2: Start the integrated DIC system, ensure that the high-speed camera is aimed at the specimen surface, and perform real-time observation; Step 3: The shear loading mechanism drives the two shear die fixing parts to move, thereby realizing the shear test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time. Step 4: After the shear test is completed, the upper cover plate and the lower cover plate are disassembled, and only the side plate is retained, and the test piece is bonded to the side plate by glue, and then the two side plates are rotated 90° and transferred to the two tensile loading mechanism fixing parts; Step 5: Adjust the angle of the high-speed camera of the DIC system so that it is aligned with the surface of the transferred specimen and conduct real-time observation; Step 6: The two tensile die fixing parts are driven to move by the tensile loading mechanism to realize the tensile test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time. Step 7: Collect the images and data recorded by the DIC system, and perform image analysis using the DIC analysis software to obtain the deformation field and stress distribution of the specimen. Based on the analysis results, calculate the shear strength, tensile strength, and stress-strain relationship of the polymer and soil.

[0010] Among them, the polymer-soil composite material used in the experiment ensures the uniform combination of polymer and soil through optimized design.

[0011] During the test, a randomly distributed black and white speckle pattern was sprayed on the surface of the specimen as a mark for DIC observation.

[0012] The present invention provides a shear and stretching method and device between a polymer and a soil body. When used, firstly, two upper cover plates, two side plates and two lower cover plates are used to enclose a specimen placement cavity, and the specimen is placed in the placement cavity. Then, the integrated DIC system is started to ensure that the high-speed camera is aimed at the specimen surface and real-time observation is performed. The two shearing mold fixing parts are driven to move by the shear loading mechanism to realize the shear test of the specimen. At the same time, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time. After the shear test is completed, the upper cover plate and the lower cover plate are removed, and only the side plates are retained. The specimen is bonded to the side plates by glue. Then, the two side plates are rotated 90 degrees and the two side plates are transferred to the two The high-speed camera of the DIC system is adjusted in angle on each of the above-mentioned tensile loading mechanism fixtures so as to align with the surface of the transferred specimen and perform real-time observation. The two tensile mold fixtures are driven to move by the tensile loading mechanism to realize the tensile test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, analyzes and records the deformation and failure process of the specimen in real time, finally collects the images and data recorded by the DIC system, performs image analysis through the DIC analysis software, obtains the deformation field and stress distribution of the specimen, and calculates the shear strength, tensile strength and stress-strain relationship of the polymer and the soil according to the analysis results. In this way, the technical problems of the shear and tensile method device in the prior art, such as limited fixing effect, poor adaptability, complex operation and lack of real-time analysis capability, are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the shearing experiment of the present invention.

[0015] Figure 2 It is a schematic structural diagram of the tensile test of the present invention.

[0016] 101 - placement frame, 102 - shearing die fixing part, 103 - stretching die fixing part, 104 - first fixing screw, 105 - second fixing screw, 106 - upper cover plate, 107 - side plate, 108 - lower cover plate, 109 - placement cavity. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0018] See also Figure 1 and Figure 2 ,in Figure 1 It is a structural schematic diagram of the shearing experiment of the present invention. Figure 2 It is a schematic structural diagram of the tensile test of the present invention.

[0019] The present invention provides a shearing and stretching device between a polymer and a soil body, comprising a placing frame 101, two shearing die fixing parts 102 and two stretching die fixing parts 103, wherein the two shearing loading mechanism fixing parts are connected to the shearing loading mechanism through two first fixing screws 104, and the two stretching loading mechanism fixing parts are connected to the stretching loading mechanism through two second fixing screws 105, and the placing frame 101 is arranged on the two shearing die fixing parts 102, and the placing frame 101 is used to place a test piece, and the placing frame 101 is also adapted to the two stretching loading mechanism fixing parts; The placement frame 101 includes two upper cover plates 106, two side plates 107 and two lower cover plates 108, the upper cover plates 106 are connected to the corresponding shear loading mechanism fixing parts, the lower cover plates 108 and the side plates 107 are also connected to the corresponding shear loading mechanism fixing parts, the two upper cover plates 106, the two side plates 107 and the two lower cover plates 108 enclose a specimen placement cavity 109, and the upper cover plates 106 and the lower cover plates 108 are detachably connected to the corresponding side plates 107 respectively; The test piece placed in the placement cavity 109 is a polymer-soil composite material.

[0020] With respect to this specific embodiment, when it is used, firstly, two upper cover plates 106, two side plates 107 and two lower cover plates 108 are used to enclose a specimen placement cavity 109, and the specimen is placed in the placement cavity 109, then the integrated DIC system is started, the high-speed camera is ensured to be aimed at the specimen surface, and real-time observation is performed, and the two shearing mold fixing parts 102 are driven to move by the shear loading mechanism, so as to realize the shear test of the specimen, and at the same time, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and destruction process of the specimen in real time. After the shear test is completed, the upper cover plate 106 and the lower cover plate 108 are removed, and only the side plate 107 is retained, and the specimen is bonded to the side plate 107 by glue, and then the two side plates 107 are rotated 90°, and the two The side plate 107 is transferred to the two tensile loading mechanism fixtures, and the angle of the high-speed camera of the DIC system is adjusted to align with the surface of the specimen after the transfer, and real-time observation is performed. The two tensile mold fixtures 103 are driven to move by the tensile loading mechanism to realize the tensile test of the specimen. At the same time, the DIC system continuously captures the image of the specimen surface, analyzes and records the deformation and failure process of the specimen in real time, and finally collects the images and data recorded by the DIC system, and performs image analysis through the DIC analysis software to obtain the deformation field and stress distribution of the specimen. According to the analysis results, the shear strength, tensile strength and stress-strain relationship of the polymer and the soil are calculated. In this way, the technical problems of the shear and tensile method devices in the prior art, such as limited fixing effect, poor adaptability, complex operation and lack of real-time analysis capability, are solved.

[0021] The present invention also provides a shearing and stretching method between a polymer and soil, which is applied to the shearing and stretching device between a polymer and soil as described above. The steps include: S101, firstly, using the two upper cover plates 106, the two side plates 107 and the two lower cover plates 108 to enclose a specimen placement cavity 109, and placing the specimen in the placement cavity 109; According to this specific embodiment, the upper and lower surfaces of the side panels 107 are provided with bolt holes; the upper panel and the lower panel are fixed to the side panels 107 by bolts to form the placement frame 101; The upper panel, the lower panel and the side panel 107 are fixed with bolts; the two side panels 107 are placed vertically, with the upper panel at the top and the lower panel at the bottom; the two side panels 107 are aligned to form a closed shear space.

[0022] Step 2: Start the integrated DIC system, ensure that the high-speed camera is aimed at the specimen surface, and perform real-time observation; Step 3: The two shearing die fixing members 102 are driven to move by the shear loading mechanism, thereby realizing the shear test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, analyzes and records the deformation and failure process of the specimen in real time, and obtains the shear mechanical performance data of the specimen; According to this specific embodiment, a horizontal force F is applied by a shear loading mechanism to perform shear loading on the specimen.

[0023] Step 4: After the shear test is completed, the upper cover plate 106 and the lower cover plate 108 are removed, and only the side plate 107 is retained, and the test piece is bonded to the side plate 107 by glue, and then the two side plates 107 are rotated 90° and transferred to the two tension loading mechanism fixing parts; According to this specific embodiment, the upper panel and the lower panel can be disassembled by removing the bolts, and a vertical upward tensile force F is applied by a tensile loading mechanism to perform tensile loading on the specimen.

[0024] Step 5: Adjust the angle of the high-speed camera of the DIC system so that it is aligned with the surface of the transferred specimen and conduct real-time observation; Step 6: The two stretching die fixing members 103 are driven to move by the stretching loading mechanism, thereby realizing the stretching test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time; Step 7: Collect the images and data recorded by the DIC system, and perform image analysis using the DIC analysis software to obtain the deformation field and stress distribution of the specimen. Based on the analysis results, calculate the shear strength, tensile strength, and stress-strain relationship of the polymer and soil.

[0025] The polymer-soil composite material used in the experiment ensures uniform bonding between the polymer and the soil through optimized design.

[0026] During the test, a randomly distributed black and white speckle pattern was sprayed on the surface of the specimen as a mark for DIC observation.

[0027] The shear and stretching method and device for polymer and soil of the present invention are used. When in use, firstly, two upper cover plates 106, two side plates 107 and two lower cover plates 108 are used to enclose a specimen placement cavity 109, and the specimen is placed in the placement cavity 109. Then, the integrated DIC system is started to ensure that the high-speed camera is aimed at the specimen surface and real-time observation is performed. The two shearing mold fixing parts 102 are driven to move by the shear loading mechanism to realize the shear test of the specimen. At the same time, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time. After the shear test is completed, the upper cover plate 106 and the lower cover plate 108 are removed, and only the side plate 107 is retained. The specimen is bonded to the side plate 107 by glue, and then the two side plates 107 are rotated 90 °, and transfer the two side plates 107 to the two tensile loading mechanism fixtures, adjust the angle of the high-speed camera of the DIC system so that it is aligned with the surface of the specimen after the transfer, and perform real-time observation, and drive the two tensile mold fixtures 103 to move through the tensile loading mechanism, thereby realizing the tensile test of the specimen, and at the same time, the DIC system continuously captures the image of the specimen surface, analyzes and records the deformation and failure process of the specimen in real time, and finally collects the images and data recorded by the DIC system, and performs image analysis through the DIC analysis software to obtain the deformation field and stress distribution of the specimen, and calculates the shear strength, tensile strength and stress-strain relationship of the polymer and the soil according to the analysis results, thereby solving the technical problems of the shear and tensile method device in the prior art, such as limited fixing effect, poor adaptability, complex operation and lack of real-time analysis capability.

[0028] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A shearing and stretching device between a polymer and soil, characterized in that: It includes a placement frame, two shearing die fixings and two stretching die fixings. The two shearing loading mechanism fixings are connected to the shearing loading mechanism via two first fixing screws, and the two stretching loading mechanism fixings are connected to the stretching loading mechanism via two second fixing screws. The placement frame is arranged on the two shearing die fixings. The placement frame is used to place the specimens, and the placement frame is also adapted to the two stretching loading mechanism fixings.

2. The shearing and stretching device between polymer and soil as claimed in claim 1, characterized in that: The placement frame includes two upper cover plates, two side plates and two lower cover plates. The upper cover plates are connected to the corresponding shear loading mechanism fixing parts, and the lower cover plates and the side plates are also connected to the corresponding shear loading mechanism fixing parts. The two upper cover plates, the two side plates and the two lower cover plates enclose a placement cavity for the specimen, and the upper cover plates and the lower cover plates are respectively detachably connected to the corresponding side plates.

3. The shearing and stretching device between polymer and soil as claimed in claim 2, characterized in that: The test piece placed in the placement cavity is a polymer-soil composite material.

4. A shearing and stretching method between a polymer and soil, applied to the shearing and stretching device between a polymer and soil as claimed in claim 3, characterized in that: The steps include: Step 1: firstly, using two upper cover plates, two side plates and two lower cover plates to enclose a specimen placement cavity, and placing the specimen in the placement cavity; Step 2: Start the integrated DIC system, ensure that the high-speed camera is aimed at the specimen surface, and perform real-time observation; Step 3: The shear loading mechanism drives the two shear die fixing parts to move, thereby realizing the shear test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time. Step 4: After the shear test is completed, the upper cover plate and the lower cover plate are disassembled, and only the side plate is retained, and the test piece is bonded to the side plate by glue, and then the two side plates are rotated 90° and transferred to the two tensile loading mechanism fixing parts; Step 5: Adjust the angle of the high-speed camera of the DIC system so that it is aligned with the surface of the transferred specimen and conduct real-time observation; Step 6: The two tensile die fixing parts are driven to move by the tensile loading mechanism to realize the tensile test of the specimen. Meanwhile, the DIC system continuously captures the image of the specimen surface, and analyzes and records the deformation and failure process of the specimen in real time. Step 7: Collect the images and data recorded by the DIC system, and perform image analysis using the DIC analysis software to obtain the deformation field and stress distribution of the specimen. Based on the analysis results, calculate the shear strength, tensile strength, and stress-strain relationship of the polymer and soil.

5. The shearing and stretching method between a polymer and soil as claimed in claim 4, characterized in that: The polymer-soil composite material used in the experiment ensures uniform bonding between the polymer and the soil through optimized design.

6. The shearing and stretching method and device between polymer and soil as claimed in claim 5, characterized in that: During the test, a randomly distributed black and white speckle pattern was sprayed on the surface of the specimen as a marker for DIC observation.

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