Annular bearing frame

Abstract

The utility model belongs to the technical field of ultra-large three-dimensional physical model tests, and particularly relates to an annular bearing frame. The bearing structure comprises a bearing structure, and is characterized in that the bearing structure comprises an annular stress structure, and the annular stress structure is connected through a connecting structure; a working area is arranged in the annular stress structure, and an actuator set is arranged in the working area. According to the utility model, compared with the traditional prestressed structure, the deformation of the frame is obviously reduced, the credibility of test data is improved, the safety and the reliability are obviously improved, the intrinsic safety characteristic is realized, and the safety and the reliability of the ultra-large physical model loading frame are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of super-large three-dimensional physical model testing, and in particular relates to an annular bearing frame. Background Art

[0002] At present, problems such as poor safety and great engineering difficulty have long plagued the use of in-situ test methods to study the formation mechanism of complex geological structures and extreme host environments in deep engineering projects of 10,000 meters, and the breeding mechanism of major disasters in deep engineering. Now, physical models of artificially configured three-dimensional similar materials are usually used to carry out relevant experiments under different boundary conditions. The theoretical basis of ultra-large physical model experiments is the principle of similarity. This method can effectively solve many problems of in-situ test methods.

[0003] The reliability of the loading structure is directly related to the accuracy and precision of the test, and thus to the credibility of the experimental data. The similarity ratio of existing test equipment is too large to truly reflect the complex geological structure information. At the same time, there are also the following problems:

[0004] The existing three-dimensional reaction frames are usually traditional prestressed structures in both horizontal and vertical directions, and usually adopt welded structures. Such structures are still acceptable for small-sized specimens below 2 meters, but cannot meet the test requirements of ultra-large three-dimensional physical model tests, such as tests of 10,000 tons or more.

[0005] The existing three-dimensional reaction frame is usually composed of two reaction frames, one of which provides horizontal reaction force and the other provides vertical reaction force. According to the layout form, it is divided into vertical and horizontal. Whether vertical or horizontal, in order to achieve the entry and exit of the specimen, it is usually necessary to move the frame horizontally or vertically. This technical solution is feasible for the loading structure of small-sized specimens below 2m, and the moving mass is usually small. However, when facing super-large loading structures, such as loading structures of more than 10,000 tons, the moving mass is usually thousands of tons, which poses a great safety risk.

[0006] The existing three-dimensional reaction force frame, whether vertical or horizontal, has a significant disadvantage. Due to structural limitations, a heavy-duty lifting device is usually required for the specimen to enter the loading position. The appearance of this device will bring great safety challenges to the entire equipment and low reliability. In the existing horizontal layout, in order to facilitate the entry and exit of the specimen, one end of the horizontal load-bearing frame usually needs to be opened. The horizontal load-bearing frame overcomes the loading reaction force through the column, and each test requires the fixing and removal of the column nuts. The removal of heavy nuts is labor-intensive and difficult to operate, and it is necessary to ensure that the prestress of many columns is consistent, which is a very delicate and time-consuming task.

[0007] The existing horizontal loading structure uses a sample transfer system to enter the loading structure, which is usually suitable for small-sized samples below 2m, but not for super-large loading structures. Because the samples used in super-large loading structure tests are usually hundreds of tons, the existing transfer system cannot withstand such heavy loads.

[0008] In summary, it is impossible to realize super-large loading structure based on existing technology, and it must be realized by using breakthrough innovative technology. Therefore, it is very necessary to develop a super-large three-dimensional physical model horizontal loading device. Utility Model Content

[0009] The purpose of the utility model is to provide an annular bearing frame.

[0010] An annular bearing frame comprises a bearing structure, wherein the bearing structure comprises an annular force-bearing structure, and the annular force-bearing structure is connected via a connecting structure; a working area is arranged inside the annular force-bearing structure, and an actuator group is arranged in the working area.

[0011] Furthermore, the annular bearing frame comprises an annular petal beam, and a plurality of annular petal beams are combined to form an annular structure; a steel wire winding belt is wound around the outer side of the annular petal beam.

[0012] Furthermore, another structure of the annular supporting frame includes first fan-shaped beams with large curvature arranged at four corners, second fan-shaped beams with small curvature are arranged between two adjacent first fan-shaped beams, and a straight section beam is arranged in the middle of the second fan-shaped beams; a wire winding belt is wrapped around the outer side of the annular supporting frame.

[0013] Correspondingly, the steel wire wrapping belt is a prestressed steel wire wrapping belt.

[0014] Furthermore, an annular beam structure composed of several annular petal beams or several first fan-shaped beams, second fan-shaped beams and straight segment beams is an annular load-bearing beam, and pad beams are embedded in the upper, lower, left and right sides of the inner hole of the annular load-bearing beam, and the actuator group is arranged on the pad beam.

[0015] Furthermore, an actuator group is arranged on the cushion beam through an actuator bottom plate, and a supporting platform is arranged between the actuator group on the lower side and the actuator bottom plate.

[0016] The beneficial effects of the utility model.

[0017] 1. High rigidity load-bearing frame.

[0018] The annular load-bearing frame is a wire-wound prestressed structure that can provide high-rigidity bearing in the load-bearing direction. The frame's own deformation is significantly reduced compared to traditional prestressed structures, thereby improving the credibility of the test data.

[0019] 2. The inherent safety feature of no movement of the load-bearing frame.

[0020] Traditional loading structures usually require horizontal or vertical frame movement in order to enable specimen entry and exit. The horizontal load-bearing frame and the annular load-bearing frame of the present invention are both fixed, which significantly improves safety and reliability and has intrinsic safety characteristics.

[0021] 3. High rigidity steel wire wound load-bearing frame.

[0022] The vertical load-bearing frame with wire winding prestressing technology effectively solves the problems of weak stiffness, low fatigue resistance, weak anti-eccentric load capability and stress concentration of the vertical load-bearing frame in super-large three-dimensional physical model tests, thereby improving the safety and reliability of the loading frame of super-large physical models. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the annular load-bearing frame structure.

[0024] Figure 2 It is a schematic diagram of the vertical wire winding load-bearing frame structure.

[0025] Explanation of the serial numbers in the figure: 1. load-bearing structure, 2. annular load-bearing frame, 9. actuator assembly, 14. annular petal beam, 15. load-bearing beam, 16. support platform, 22. wire wrapping belt, 23. actuator base plate, 46. first fan-shaped beam, 47. second fan-shaped beam, 48. straight segment beam, 49. cushion beam. DETAILED DESCRIPTION

[0026] The utility model provides an annular bearing frame, comprising a bearing structure 1, wherein the bearing structure 1 comprises an annular force-bearing structure, and the annular force-bearing structure is connected via a connecting structure; a working area is arranged inside the annular force-bearing structure, and an actuator group 9 is arranged in the working area.

[0027] Furthermore, the annular bearing frame 2 includes an annular split beam 14 , and a plurality of annular split beams 14 are combined to form an annular structure; a steel wire winding belt 22 is wound around the outer side of the annular split beam 14 .

[0028] Furthermore, another structure of the annular supporting frame 2 includes first fan-shaped beams 46 with large curvatures arranged at four corners, second fan-shaped beams 47 with small curvatures are arranged between two adjacent first fan-shaped beams 46, and a straight section beam 48 is arranged in the middle of the second fan-shaped beams 47; a wire winding belt 22 is wound around the outer side of the annular supporting frame 2.

[0029] Correspondingly, the steel wire wrapping belt 22 is a prestressed steel wire wrapping belt.

[0030] Furthermore, the annular beam structure composed of several annular split beams 14 or several first fan-shaped beams 46, second fan-shaped beams 47 and straight segment beams 48 is an annular load-bearing beam 15, and pad beams 49 are embedded in the upper, lower, left and right sides of the inner hole of the annular load-bearing beam 15, and the actuator group 9 is arranged on the pad beam 49.

[0031] Furthermore, an actuator group 9 is disposed on the cushion beam 49 through the actuator bottom plate 23 , and a supporting platform 16 is also disposed between the actuator group 9 on the lower side and the actuator bottom plate 23 .

[0032] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. An annular bearing frame, comprising a bearing structure (1), characterized in that: The bearing structure (1) comprises an annular force-bearing structure, and the annular force-bearing structure is connected via a connecting structure; a working area is arranged inside the annular force-bearing structure, and an actuator group (9) is arranged in the working area.

2. The annular bearing frame according to claim 1, characterized in that: The annular bearing frame (2) comprises an annular split beam (14), and a plurality of annular split beams (14) are combined to form an annular structure; a steel wire winding belt (22) is wound around the outer side of the annular split beam (14).

3. The annular bearing frame according to claim 1, characterized in that: Another structure of the annular supporting frame (2) comprises first fan-shaped beams (46) with large curvatures arranged at four corners, second fan-shaped beams (47) with small curvatures arranged between two adjacent first fan-shaped beams (46), and a straight section beam (48) arranged in the middle of the second fan-shaped beams (47); and a steel wire winding belt (22) is wound around the outer side of the annular supporting frame (2).

4. The annular bearing frame according to claim 2 or 3, characterized in that: The steel wire wrapping belt (22) is a prestressed steel wire wrapping belt.

5. The annular load-bearing frame according to claim 2 or 3, characterized in that: An annular beam structure composed of a plurality of annular split beams (14) or a plurality of first fan-shaped beams (46), a second fan-shaped beam (47) and a straight segment beam (48) is an annular load-bearing beam (15), and cushion beams (49) are embedded in the upper, lower, left and right sides of the inner hole of the annular load-bearing beam (15), and the actuator group (9) is arranged on the cushion beam (49).

6. The annular bearing frame according to claim 5, characterized in that: An actuator group (9) is arranged on the cushion beam (49) via an actuator base plate (23), and a supporting platform (16) is also arranged between the actuator group (9) on the lower side and the actuator base plate (23).

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