Weak boundary visualized centrifugal vibration device suitable for inclined stratum and using method of weak boundary visualized centrifugal vibration device
By setting up a visual rigid model box with transparent plexiglass plate body and truncated frame structure on the centrifuge vibration table, combined with PIV technology, the problems of large boundary effects and unrealistic inclined formation simulation of traditional centrifuge vibration table model box are solved, and accurate observation of model box with small boundary effects, visual stratigraphic deformation and inclined formation simulation are achieved, which improves the reliability and data accuracy of model experiments.
Patent Information
- Application Number
- CN202510678979.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-26
- Publication Date
- 2025-08-12
AI Technical Summary
The model box of the traditional centrifuge vibration table has problems such as rigid boundary constraints and the real geological environment, unvisible surface deformation on the strata, and unreal simulation of inclined strata, resulting in large boundary effects of the model box, difficulty in observation and insufficient simulation accuracy.
A weak boundary visual centrifugal vibration device suitable for inclined formations is designed, a visual rigid model box with transparent plexiglass plate body and truncated frame structure is used to monitor it in real time, and the stratigraphic inclination is regulated through inclined pads to reduce boundary effects and support digital and accurate simulation.
The model box boundary effect is small, visual stratigraphic deformation and inclined strata simulation are realized, which improves the reliability and data accuracy of model experiments and supports the construction of full-time and spatio-temporal data links.
Smart Images
Figure CN120467628A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of geotechnical testing devices, and in particular to a weak boundary visualization centrifugal vibration device suitable for inclined strata and a use method thereof. Background Art
[0002] As an important means of physical model research, centrifuge model testing plays an irreplaceable role in geotechnical engineering, geomechanics, underground structures and other fields. Its core principle is to use the centrifugal force field generated by the high-speed rotation of the centrifuge to apply a self-weight stress field equivalent to the prototype to the scaled model, thereby reproducing the mechanical behavior of soil, rock or underground structures under the action of gravity under laboratory conditions.
[0003] Centrifuge vibration table technology was developed to meet the needs of simulating dynamic loads such as earthquakes and explosions. It achieves coupled loading of the gravity field and the dynamic field by superimposing horizontal or vertical vibration loads during the high-speed rotation of the centrifuge. Traditional centrifuge vibration tables mostly use electromagnetic drive or hydraulic servo systems, installed at the bottom or side of the model box, and can output vibration waveforms with a frequency range of 1-200Hz and a peak acceleration of 0.1g-20g.
[0004] Traditional centrifuge vibration table model box devices often use a fully rigid box structure. For example, a closed box welded from high-strength aluminum alloy or stainless steel has its side walls and bottom rigidly bolted to withstand high centrifugal accelerations, typically 50g-200g. This design achieves a stress distribution within the model that is consistent with the original through the synchronous rotation of the box and the model soil. This design has been widely used in scenarios such as inclined strata stability analysis, pile foundation bearing capacity testing, and tunnel excavation simulation.
[0005] However, with the increasing demand for simulation of complex geological conditions and multi-field coupling tests, existing technologies have exposed obvious limitations:
[0006] First, the rigid boundary constraints do not match the real geological environment. Significant frictional constraints exist between the rigid sidewalls of traditional model boxes and the soil, resulting in anomalous shear bands in the soil deformation field near the box walls, which severely interferes with the transmission of horizontal displacements and reduces the reliability of the physical model. To mitigate this boundary effect, flexible materials such as composite foam sheets, sponges, or Duxseal are attached to the rigid sidewalls to create rigid model boxes with absorbing boundaries. These flexible materials can absorb a portion of the incident wave, significantly reducing the waves reflected into the model, but they cannot completely eliminate the boundary effect, and the nonlinear behavior of the flexible materials can cause some uncertainties. Layered shear beam containers allow free shear deformation between layers. In centrifuge shaking table experiments, such containers minimize boundary effects and are widely used in free-field simulations. However, the stacked layers of layered shear beam containers contain sliding rails or guide structures to ensure shear direction. These guide structures force each layer to slide along a fixed path. Real soil layers can exhibit localized inhomogeneities, such as strain localization, and this "idealized" constraint can mask the complex shear behavior experienced in actual earthquakes.
[0007] Secondly, the deformation process of the lateral surface of the stratum is not visualized; traditional model boxes mostly use fully enclosed metal structures and lack transparent observation windows, which makes it impossible for researchers to capture the continuous deformation process of the lateral surface of the inclined stratum in real time through high-speed camera equipment, and the existing visualization model boxes cannot be used in conjunction with layered shear beam containers; the experimental data acquisition of the fully enclosed model box is highly dependent on discrete point sensors, and the distribution of the lateral surface displacement field can only be indirectly inferred through inversion calculations. It is not only difficult to accurately depict dynamic damage details such as sliding surface formation and slope crack expansion, but also due to the lack of visual image data support, it is impossible to introduce particle image velocimetry technology (PIV) for displacement analysis.
[0008] Third, the ability to simulate inclined strata is insufficient; traditional model boxes mostly use artificial horizontal layered filling methods, and artificially stacked slopes lead to local stress concentration due to the direct application of the material's own weight; for example, the self-weight stress of the masonry will significantly increase the tangential stress at the toe of the slope, and may even produce a tensile stress zone, which deviates from the gradual stress adjustment process of the natural slope; during the artificial stacking process, the layer-by-layer filling of materials may introduce layered compaction differences, resulting in local uneven density; the artificial stacking method is prone to human operational errors, resulting in insufficient slope accuracy, and the masonry may pre-settle due to gravity, changing the initial geometric shape.
[0009] Therefore, there is an urgent need for a weak boundary visualization centrifugal vibration device suitable for inclined strata and a method of use to solve the above technical problems. Summary of the Invention
[0010] The present invention aims to solve the above problems, and thus provides a weak-boundary visualization centrifugal vibration device applicable to inclined strata and a usage method, achieving the purposes of small boundary effect of the model box, observing test changes, and combining with PIV technology and simulating inclined strata.
[0011] The technical solution adopted by the present invention to solve the above problems is as follows:
[0012] A weak-boundary visualization centrifugal vibration applicable to inclined strata includes a centrifuge vibration table platform. On the centrifuge vibration table platform, there are arranged a first inclined pad, a second inclined pad, and a third inclined pad arranged in sequence from left to right and with gradually decreasing heights. A visualization rigid model box is jointly arranged on the first inclined pad, the second inclined pad, and the third inclined pad, and the visualization rigid model box inclines with the height changes of the first inclined pad, the second inclined pad, and the third inclined pad. The interior of the visualization rigid model box is hollow and has an open top, including a bottom plate body. On the upper surface of the bottom plate body, side plate bodies are vertically fixed on the left side, the right side, and the rear side, and a transparent plate body is vertically fixed on the front side of the upper surface of the bottom plate body. The three side plate bodies and one transparent plate body are enclosed and connected together. Inside the visualization rigid model box, there is arranged a retaining soil component in a 冂-shaped structure. The retaining soil component is located between the two side plate bodies on the left and right and is close to the rear side plate body. The retaining soil component is arranged at an interval from the two side plate bodies on the left and right, and frame fixators for restricting the movement of the retaining soil component are arranged between the two side plate bodies on the left and right and the retaining soil component. A sand filling part is jointly enclosed and arranged between the retaining soil component and the transparent plate body.
[0013] Furthermore, the retaining soil component includes several 冂-shaped frames stacked from bottom to top. The cross-section of each 冂-shaped frame is in a 凵-shaped structure, and a concave material filling part is arranged in the middle of each 冂-shaped frame. PTFE material is filled in the material filling part. The length of the PTFE material is greater than the length of the material filling part, and the PTFE material protrudes upward from the material filling part.
[0014] Furthermore, the frame fixator includes a fixator baffle clamped between the side plate body and the retaining soil component. The fixator baffle is vertically arranged and has a height greater than that of the retaining soil component and less than that of the side plate body. An L-shaped flat plate is fixedly connected to the fixator baffle, and the L-shaped flat plate contacts the upper surface of the retaining soil component. At least one fixator bolt is threadedly connected to the upper surface of the L-shaped flat plate.
[0015] Furthermore, the upper surfaces of the two L-shaped flat plates and the upper surface of the visualization rigid model box are on the same horizontal plane.
[0016] Furthermore, the L-shaped plate includes a horizontal part and a vertical part, the horizontal part is fixedly connected to the fixer baffle, the vertical part is vertically fixed to the lower surface of the horizontal part, and the vertical part is located on the end of the horizontal part away from the fixer baffle, and the lower end of the vertical part contacts the upper surface of the retaining assembly.
[0017] Furthermore, two connecting wing plates are connected to the left and right sides of the bottom plate body, and the two connecting wing plates on the same side are spaced apart front and rear. Two upper bolt holes are provided on the upper surfaces of the first inclined pad and the third inclined pad. Upper bolts threadedly connected to the two connecting wing plates on the left are provided in the two upper bolt holes of the first inclined pad. Upper bolts threadedly connected to the two connecting wing plates on the right are provided in the two upper bolt holes of the third inclined pad. Two lower bolt holes are provided on the lower surfaces of the first inclined pad and the third inclined pad. Lower bolts threadedly connected to the centrifuge vibration table platform are provided in the two lower bolt holes of the first inclined pad and the third inclined pad.
[0018] Furthermore, fixed accelerometers are threadedly connected to the two connecting wing plates on the right side.
[0019] Furthermore, the second inclined pad is sandwiched between the centrifuge vibration table platform and the bottom plate of the visual rigid model box.
[0020] Furthermore, the transparent plate is made of transparent organic glass.
[0021] A method for using weak boundary visualization centrifugal vibration for inclined strata includes the following steps:
[0022] S1. Build the retaining assembly inside the visual rigid model box, and install frame fixers between the left side panel body and the retaining assembly and between the right side panel body and the retaining assembly;
[0023] S2. Then fill the sand filling part with test sand;
[0024] S3, placing the first inclined pad, the second inclined pad, and the third inclined pad on the centrifuge vibration table platform in order from left to right, and fixing the first inclined pad and the third inclined pad on the centrifuge vibration table platform with lower bolts;
[0025] S4. The visual rigid model box filled with test sand is then placed on the first tilted pad, the second tilted pad and the third tilted pad, and the visual rigid model box is fixed to the first tilted pad and the third tilted pad by upper bolts, and the second tilted pad is clamped between the centrifuge vibration table platform and the visual rigid model box;
[0026] S5. Install the two fixed accelerometers correspondingly on the two connecting wing plates on the right side;
[0027] S6. Remove the frame holder from the visual rigid model box. After the frame holder is removed, the test sand will cause the convex frame in the retaining assembly to shift under the action of gravity, and then record the shift displacement data of the convex frame.
[0028] S7. Start the centrifuge vibration table to conduct the test. After the test, record the displacement data of the shaped frame. The difference in displacement before and after is the displacement of the test sand in the experiment.
[0029] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features:
[0030] The present invention solves the problems of large boundary effects, lack of visualization, and unrealistic simulation of inclined strata in traditional model boxes through a three-in-one innovative architecture. This achieves the goal of minimizing the boundary effects of the model box, observing experimental changes, and combining PIV technology with simulation of inclined strata.
[0031] The present invention achieves real-time monitoring of the lateral surface of the inclined stratum by setting a transparent plate in a visual rigid model box and combining it with high-speed synchronous imaging technology (PIV), building a full-time and space-time data chain, avoiding the one-sidedness of traditional discrete sensor data inversion, and achieving the purpose of observing the changes in the lateral surface of the inclined stratum during the test process.
[0032] The present invention supports digital and precise control of the formation dip angle by arranging a first tilting pad, a second tilting pad, and a third tilting pad between the visual rigid model box and the centrifuge vibration table platform, thereby achieving the purpose of simulating the inclined formation and ensuring the consistency of the bonding strength of the inclined interface.
[0033] The present invention sets a retaining assembly in a visual rigid model box. When the two frame fixtures are removed, the upper and lower convex frames in the retaining assembly can slide dislocatedly under external force, thereby significantly weakening the boundary effect, inhibiting the abnormal development of shear bands, restoring the real mechanical response of infinite domain soil displacement transmission, and improving the reliability of the model test. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 It is a schematic diagram of the main structure of the present invention;
[0035] Figure 2 yes Figure 1 Schematic diagram of a locally enlarged structure;
[0036] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;
[0037] Figure 4 It is a schematic structural diagram of the first inclined pad, the second inclined pad and the third inclined pad of the present invention;
[0038] Figure 5 It is a top - view structural schematic diagram of the U - shaped frame of the present invention;
[0039] Figure 6 It is a cross - sectional structural schematic diagram of the U - shaped frame of the present invention;
[0040] In the figure: 1. Centrifuge shaker platform; 2. First inclined cushion block; 3. Second inclined cushion block; 4. Third inclined cushion block; 5. Visual rigid model box; 6. Bottom plate body; 7. Side plate body; 8. Transparent plate body; 9. Retaining soil component; 10. Frame fixator; 11. Sandy soil filling part; 12. U - shaped frame; 13. PTFE material; 14. Fixator baffle; 15. L - shaped flat plate; 16. Fixator bolt; 17. Connecting wing plate; 18. Upper bolt hole; 19. Lower bolt hole; 20. Fixed accelerometer. Detailed implementation mode
[0041] Through the following description of the embodiments, it will be more helpful for the public to understand the present invention. However, the specific embodiments given by the applicant should not be regarded as a limitation on the technical solution of the present invention. Any change in the definition of components or technical features and / or any formal rather than substantial transformation of the overall structure should be regarded as within the protection scope defined by the technical solution of the present invention.
[0042] See Figures 1 to 6 As shown, the technical solution of the present invention is as follows:
[0043] A weak - boundary visualization centrifuge vibration applicable to inclined strata includes a centrifuge shaker platform 1. On the centrifuge shaker platform 1, a first inclined cushion block 2, a second inclined cushion block 3 and a third inclined cushion block 4 are placed. The first inclined cushion block 2, the second inclined cushion block 3 and the third inclined cushion block 4 are all strip - shaped and arranged in sequence from left to right on the centrifuge shaker platform 1 with gradually decreasing heights. The first inclined cushion block 2, the second inclined cushion block 3 and the third inclined cushion block 4 can be designed with different inclination degrees according to experimental requirements. A visual rigid model box 5 is jointly arranged on the first inclined cushion block 2, the second inclined cushion block 3 and the third inclined cushion block 4, and the visual rigid model box 5 inclines as the heights of the first inclined cushion block 2, the second inclined cushion block 3 and the third inclined cushion block 4 change;
[0044] The interior of the visual rigid model box 5 is hollow and its top is open. It includes a bottom plate body 6, three side plate bodies 7 and a transparent plate body 8. The transparent plate body 8 is transparent organic glass, and the transparent plate body 8 is the visible surface of the visual rigid model box 5. A camera is placed directly in front of the visible surface outside the visual rigid model box 5 to cooperate with PIV technology for displacement analysis of the inclined strata;
[0045] On both the left and right sides of the bottom plate body 6, two connecting wing plates 17 are connected. The two connecting wing plates 17 on the same side are arranged at intervals, one in front of the other. On the upper surface of the first inclined cushion block 2, two upper bolt holes 18 are opened. In the two upper bolt holes 18, upper bolts are threadedly connected to fix the first inclined cushion block 2 and the two connecting wing plates 17 on the left side together. On the upper surface of the third inclined cushion block 4, two upper bolt holes 18 are opened. In the two upper bolt holes 18, upper bolts are threadedly connected to fix the third inclined cushion block 4 and the two connecting wing plates 17 on the right side together. On the lower surface of the first inclined cushion block 2, two lower bolt holes 19 are opened. On the lower surface of the third inclined cushion block 4, two lower bolt holes 19 are opened. In the four lower bolt holes 19, lower bolts are threadedly connected to fix the first inclined cushion block 2 and the third inclined cushion block 4 on the centrifuge vibration table platform 1; among them, the positions of the four upper bolt holes 18 and the four lower bolt holes 19 can be designed according to the positions of the bolt holes on the centrifuge vibration table platform 1 and the visualization rigid model box 5 so as to make them adaptable; in addition, the second inclined cushion block 3 is clamped between the centrifuge vibration table platform 1 and the bottom plate body 6 of the visualization rigid model box 5. The second inclined cushion block 3 does not have bolt holes and is not fixedly connected to the centrifuge vibration table platform 1 and the visualization rigid model box 5 because under the action of gravity and the centrifuge vibration table, the visualization rigid model box 5 will directly press the second inclined cushion block 3 to prevent it from sliding; furthermore, fixed accelerometers 20 are threadedly connected to both of the two connecting wing plates 17 on the right side. The fixed accelerometers 20 are used to record the acceleration of the bottom surface;
[0046] Three side plate bodies 7 are vertically and fixedly connected to the left side, right side and rear side of the upper surface of the bottom plate body 6 correspondingly. The transparent plate body 8 is vertically and fixedly connected to the front side of the upper surface of the bottom plate body 6. The three side plate bodies 7 and one transparent plate body 8 are enclosed and connected together. Inside the visualization rigid model box 5, a retaining soil component 9 in a 冂-shaped structure is arranged. The retaining soil component 9 is located between the two side plate bodies 7 on the left and right sides and is close to the rear side plate body 7. The retaining soil component 9 is arranged at an interval from the two side plate bodies 7 on the left and right sides, and frame fixators 10 for restricting the movement of the retaining soil component 9 are arranged between the two side plate bodies 7 on the left and right sides and the retaining soil component 9. Through the frame fixators 10, several 冂-shaped frames in the retaining soil component 9 do not displace. A sand filling part 11 is jointly enclosed and arranged between the retaining soil component 9 and the transparent plate body 8. A transparent plastic sheet is laid on the inner side surface of the transparent plate body 8. The transparent plastic sheet is clamped between the transparent plate body 8 and the end part of the retaining soil component 9. The transparent plastic sheet can prevent the sand in the sand filling part 11 from leaking.
[0047] The retaining component 9 includes a number of U-shaped frames 12. The quantity and specifications of the U-shaped frames 12 are determined according to actual requirements. The number of U-shaped frames 12 are stacked from bottom to top. The cross-section of each U-shaped frame 12 is in a U-shaped structure. And a concave material filling part is processed in the middle of each U-shaped frame 12. A PTFE material 13 is filled in the material filling part. The length of the PTFE material 13 is greater than the length of the material filling part, and the PTFE material 13 protrudes upward from the material filling part. There is no connection method between the upper and lower U-shaped frames 12, and they can move left and right to eliminate the boundary effect. The PTFE material 13 is used to reduce the friction between the upper and lower U-shaped frames 12 and between the end of the U-shaped frame 12 and the transparent plate body 8.
[0048] The frame fixator 10 includes a fixator baffle 14. The fixator baffle 14 is clamped between the side panel body 7 and the retaining component 9. The fixator baffle 14 is vertically arranged, and the height of the fixator baffle 14 is greater than that of the retaining component 9 and less than that of the side panel body 7. An L-shaped flat plate 15 is fixedly connected to the fixator baffle 14. The L-shaped flat plate 15 contacts the upper surface of the retaining component 9. Two fixator bolts 16 are threadedly connected to the upper surface of the L-shaped flat plate 15. The two fixator bolts 16 are detachably connected to the L-shaped flat plate 15. It is not only convenient to lift the frame fixator 10 through the two fixator bolts 16, but also the upper surface of the L-shaped flat plate 15 can be kept flat after removing the two fixator bolts 16, so that the saturation of the sand can be carried out in the sand filling part 11.
[0049] The upper surfaces of the two L-shaped flat plates 15 and the upper surface of the visualization rigid model box 5 are on the same horizontal plane.
[0050] The L-shaped flat plate 15 includes a horizontal part and a vertical part. The horizontal part is fixedly connected to the fixator baffle 14. The vertical part is vertically fixed on the lower surface of the horizontal part, and the vertical part is located at the end of the horizontal part far from the fixator baffle 14. The lower end of the vertical part contacts the upper surface of the retaining component 9.
[0051] A usage method of a weak boundary visualization centrifugal vibration applicable to inclined strata includes the following steps:
[0052] S1. Build the retaining component 9 inside the visualization rigid model box 5, and install frame fixators 10 between the left side panel body 7 and the retaining component 9 and between the right side panel body 7 and the retaining component 9;
[0053] S2. A transparent plastic sheet is laid on the inner side surface of the transparent plate body 8. The transparent plastic sheet is clamped between the transparent plate body 8 and the end of the retaining component 9. Then, test sand is filled into the sand filling part 11;
[0054] S3, placing the first inclined pad 2, the second inclined pad 3 and the third inclined pad 4 on the centrifuge vibration table platform 1 in order from left to right, and fixing the first inclined pad 2 and the third inclined pad 4 on the centrifuge vibration table platform 1 by lower bolts;
[0055] S4. The visual rigid model box 5 filled with test sand is then placed on the first inclined pad 2, the second inclined pad 3 and the third inclined pad, and the visual rigid model box 5 is fixed to the first inclined pad 2 and the third inclined pad 4 by upper bolts, and the second inclined pad 3 is clamped between the centrifuge vibration table platform 1 and the visual rigid model box 5;
[0056] S5. Install the two fixed accelerometers 20 correspondingly on the two connecting wing plates 17 on the right side;
[0057] S6. Remove the frame holder 10 from the visual rigid model box 5. After the frame holder 10 is removed, the test sand will cause the shaped frame 12 in the retaining assembly 9 to shift under the action of gravity, and then record the shift displacement data of the shaped frame 12.
[0058] S7, start the centrifuge vibration table to conduct the test, and record the displacement data of the shaped frame 12 after the test. The difference in displacement before and after is the displacement of the test sand in the experiment.
[0059] The present invention solves the problems of large boundary effects, lack of visualization, and unrealistic simulation of inclined strata in traditional model boxes through a three-in-one innovative architecture. This achieves the goal of minimizing the boundary effects of the model box, observing experimental changes, and combining PIV technology with simulation of inclined strata.
[0060] The present invention provides a transparent plate 8 in the visual rigid model box 5 and combines it with high-speed synchronous imaging technology, namely PIV, to achieve real-time monitoring of the lateral surface of the inclined stratum, build a full-time and space data chain, avoid the one-sidedness of traditional discrete sensor data inversion, and achieve the purpose of observing the changes in the lateral surface of the inclined stratum during the test process;
[0061] The present invention supports digital and precise control of the formation dip angle by arranging a first tilting pad 2, a second tilting pad 3, and a third tilting pad 4 between the visual rigid model box 5 and the centrifuge vibration table platform 1, thereby achieving the purpose of simulating the inclined formation and ensuring the consistency of the bonding strength of the inclined interface.
[0062] The present invention arranges a retaining assembly 9 in a visual rigid model box 5. When the two frame fixtures 10 are removed, the upper and lower convex frames 12 in the retaining assembly 9 can slide dislocatedly under external force, thereby significantly weakening the boundary effect, inhibiting the abnormal development of the shear band, restoring the real mechanical response of the infinite domain soil displacement transmission, and improving the reliability of the model test.
[0063] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of the present invention.
Claims
1. A centrifugal vibration method for visualizing weak boundaries in inclined strata, characterized by: It includes a centrifuge shaker platform. On the centrifuge shaker platform, there are arranged a first inclined cushion block, a second inclined cushion block and a third inclined cushion block which are arranged in sequence from left to right and have gradually decreasing heights. A visual rigid model box is jointly arranged on the first inclined cushion block, the second inclined cushion block and the third inclined cushion block, and the visual rigid model box inclines along with the height change of the first inclined cushion block, the second inclined cushion block and the third inclined cushion block. The interior of the visual rigid model box is hollow and the top is open, including a bottom plate body. On the upper surface of the bottom plate body, side plate bodies are vertically fixed on the left side, the right side and the rear side, and a transparent plate body is vertically fixed on the front side of the upper surface of the bottom plate body. The three side plate bodies and one transparent plate body are enclosed and connected together. Inside the visual rigid model box, there is arranged a retaining soil component in a 冂-shaped structure. The retaining soil component is located between the two side plate bodies on the left side and the right side and is close to the rear side plate body. The retaining soil component is arranged at an interval with the two side plate bodies on the left side and the right side, and frame fixators for restricting the movement of the retaining soil component are arranged between the two side plate bodies on the left side and the right side and the retaining soil component. A sand filling part is jointly enclosed and arranged between the retaining soil component and the transparent plate body.
2. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 1, characterized in that: The retaining soil component includes a plurality of 冂-shaped frames which are stacked from bottom to top. The cross section of each 冂-shaped frame is in a 凵-shaped structure, and a concave material filling part is arranged in the middle of each 冂-shaped frame. PTFE material is filled in the material filling part. The length of the PTFE material is greater than the length of the material filling part, and the PTFE material protrudes upward from the material filling part.
3. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 2, characterized in that: The frame fixator includes a fixator baffle clamped between the side plate body and the retaining soil component. The fixator baffle is vertically arranged and its height is greater than that of the retaining soil component and less than that of the side plate body. An L-shaped flat plate is fixedly connected to the fixator baffle. The L-shaped flat plate contacts the upper surface of the retaining soil component. At least one fixator bolt is threadedly connected to the upper surface of the L-shaped flat plate.
4. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 3, characterized in that: The upper surfaces of the two L-shaped flat plates and the upper surface of the visual rigid model box are on the same horizontal plane.
5. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 4, characterized in that: The L-shaped flat plate includes a horizontal part and a vertical part. The horizontal part is fixedly connected to the fixator baffle. The vertical part is vertically fixed on the lower surface of the horizontal part and is located at the end of the horizontal part far from the fixator baffle. The lower end of the vertical part contacts the upper surface of the retaining soil component.
6. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 1, characterized in that: On both the left side and the right side of the bottom plate body, two connecting wing plates are connected. The two connecting wing plates on the same side are arranged at intervals front and back. On the upper surfaces of the first inclined cushion block and the third inclined cushion block, two upper bolt holes are arranged. In the two upper bolt holes of the first inclined cushion block, upper bolts threadedly connected to the two connecting wing plates on the left side are arranged. In the two upper bolt holes of the third inclined cushion block, upper bolts threadedly connected to the two connecting wing plates on the right side are arranged. On the lower surfaces of the first inclined cushion block and the third inclined cushion block, two lower bolt holes are arranged. In the two lower bolt holes of the first inclined cushion block and the third inclined cushion block, lower bolts threadedly connected to the centrifuge shaker platform are arranged.
7. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 6, characterized in that: Fixing accelerometers are threadedly connected to the two connecting wing plates on the right side.
8. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 6, characterized in that: The second inclined pad is sandwiched between the centrifuge vibration table platform and the bottom plate of the visualization rigid model box.
9. The weak boundary visualization centrifugal vibration device applicable to inclined strata according to claim 1, characterized in that: The transparent plate is made of transparent organic glass.
10. A method for using weak boundary visualization centrifugal vibration for inclined strata according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Build the retaining assembly inside the visual rigid model box, and install frame fixtures between the left side panel body and the retaining assembly and between the right side panel body and the retaining assembly; S2. Then fill the sand filling part with test sand; S3, placing the first inclined pad, the second inclined pad, and the third inclined pad on the centrifuge vibration table platform in order from left to right, and fixing the first inclined pad and the third inclined pad on the centrifuge vibration table platform with lower bolts; S4. The visual rigid model box filled with test sand is then placed on the first tilted pad, the second tilted pad and the third tilted pad, and the visual rigid model box is fixed to the first tilted pad and the third tilted pad by upper bolts, and the second tilted pad is clamped between the centrifuge vibration table platform and the visual rigid model box; S5. Install the two fixed accelerometers correspondingly on the two connecting wing plates on the right side; S6. Remove the frame holder from the visual rigid model box. After the frame holder is removed, the test sand will cause the convex frame in the retaining assembly to shift under the action of gravity, and then record the shift displacement data of the convex frame. S7. Start the centrifuge vibration table to conduct the test. After the test, record the displacement data of the shaped frame. The difference in displacement before and after is the displacement of the test sand in the experiment.