Underwater dumping and filling simulation device in centrifugal field and test method

Abstract

The invention relates to the field of hydraulic engineering, and particularly discloses a centrifugal field underwater dumping simulation device and a test method.The centrifugal field underwater dumping simulation device comprises a centrifugal machine and a dumping simulation mechanism, the dumping simulation mechanism comprises a model box, a vertical baffle is fixedly installed in the middle of the model box, and a storage box is slidably clamped and embedded in one side of the vertical baffle; a sliding partition plate transversely penetrates through the vertical baffle. The electric traction assembly is combined with the fixed pulley, the traction steel wire rope and the guide wheel, the transverse pull-out action of the sliding partition plate can be driven in real time in the running process of the centrifugal machine, precise control over the throwing and filling process under a high centrifugal field is achieved, and data distortion caused by manual operation or mechanical delay of a traditional device is avoided; the centrifugal machine operates at the preset acceleration, the model effect is equivalently amplified, the throwing and filling dynamic process under the 40-meter water depth condition is accurately reproduced, and the water depth simulation deviation problem caused by gravity limitation in a conventional model test is solved.

Description

Technical Field

[0001] The present invention belongs to the field of hydraulic engineering, and particularly relates to an underwater filling simulation device and a test method in a centrifugal field. Background Art

[0002] Underwater filling technology is a key link in hydraulic engineering, cofferdam and dam construction. Its core lies in forming a stable underwater structure by filling materials such as gravel. The relative density, settlement characteristics and distribution law of the filling materials directly affect the safety and economy of the project.

[0003] In recent years, the geotechnical centrifuge model test technology has been introduced into the field of engineering simulation. By amplifying the model effect through a supergravity field, the prototype working conditions can be reproduced at a small scale. However, for the centrifugal simulation device of underwater filling, there is still a problem that the filling mechanism lacks dynamic response ability and cannot control the filling process in real time during the operation of the centrifuge. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides an underwater filling simulation device in a centrifugal field to solve the problem that the filling mechanism in the prior art lacks dynamic response ability and cannot control the filling process in real time during the operation of the centrifuge.

[0005] The underwater filling simulation device in a centrifugal field includes a centrifuge and a filling simulation mechanism: The filling simulation mechanism includes a model box. A vertical baffle is fixedly installed in the middle of the model box. A storage box is slidably clamped on one side of the vertical baffle. A sliding partition plate horizontally penetrates through the vertical baffle. After the sliding partition plate penetrates through the vertical baffle, the storage box is divided into an upper space and a lower space. One side of the sliding partition plate is fixedly connected with an electric traction assembly; The upper space of the storage box is filled with multiple layers of filling materials, and the lower space of the storage box is filled with water; The filling simulation mechanism is fixedly installed on the centrifuge.

[0006] Preferably, a guide wheel and a limit plate are further arranged inside the storage box; The sliding partition plate is located between the guide wheel and the limit plate.

[0007] Preferably, the electric traction assembly includes an electric telescopic rod. The output end of the electric telescopic rod is fixedly connected with a traction steel wire rope. The end of the traction steel wire rope is fixedly connected with the sliding partition plate; A fixed pulley is further fixedly installed on the model box. The traction steel wire rope changes its direction through the fixed pulley; A fixed frame is further fixedly installed on the model box. The electric telescopic rod is fixedly installed on the fixed frame.

[0008] Preferably, the model of the centrifuge is CKY-200.

[0009] A test method using the underwater dumping simulation device in the centrifugal field as described above further includes the following steps: Step 1: Weigh the dumped gravel materials according to the designed gradation, and after air drying and sun drying, layer them into the storage bin; Step 2: Lift and install the storage bin into the model box; Step 3: Lift and install the model box into the machine room of the centrifuge; Step 4: After performing counterweight balance and safety inspection on the centrifuge, gradually increase the centrifugal acceleration to the preset value of 100g and maintain stability; Step 5: Drive the sliding partition to be pulled out through the electric traction assembly, so that the dumped materials simulate the underwater dumping process under the action of the centrifugal field, and record the settlement data of the dumped materials at the same time; Step 6: After stable operation for 30 to 40 minutes, stop the machine, observe the distribution and structural changes of the dumped materials in the model box, and measure the volume and relative density of the dumped materials; Step 7: Dismantle the model box to complete the analysis and recording of the test data.

[0010] Compared with the prior art, the present invention has the following beneficial effects: Through the electric traction assembly combined with a fixed pulley, a traction steel wire rope, and a guiding wheel, the lateral pulling-out action of the sliding partition can be driven in real time during the operation of the centrifuge, realizing precise control of the dumping process under a high centrifugal field and avoiding data distortion caused by manual operation or mechanical delay in traditional devices; By operating the centrifuge at a preset acceleration, the model effect is equivalently amplified, and the dumping dynamic process under the condition of a 40-meter water depth is accurately reproduced, overcoming the problem of water depth simulation deviation caused by gravity limitation in conventional model tests; The guiding wheel and the limiting plate cooperate to restrict the movement trajectory of the sliding partition, and cooperate with the fixing frame to fix the electric telescopic rod, significantly reducing frictional interference, ensuring stable sliding of the partition under high acceleration, and improving the repeatability of the test and the reliability of the data; The design of the model box and the storage bin supports the layered filling of gravel with a maximum particle size of 20 mm, and matches the actual engineering gradation through scale reduction, broadening the applicability of the device to heterogeneous dumped materials. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic exploded view of the present invention; Figure 3 It is a sectional view of the present invention; Figure 4 It is a sectional view of the dumping simulation mechanism of the present invention; Figure 5 This is a schematic structural diagram of the electric traction assembly of the present invention.

[0012] In the figure: 1, centrifuge; 2, filling simulation mechanism; 21, model box; 22, storage bin; 23, sliding partition; 24, electric traction assembly; 241, electric telescopic rod; 242, traction steel wire rope; 25, guide wheel; 26, limit plate; 27, fixed pulley; 28, fixing frame. Specific embodiments

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0014] As Figures 1 to 4 shown: Embodiment 1: The present invention provides an underwater filling simulation device in a centrifugal field, including a centrifuge 1 and a filling simulation mechanism 2: The filling simulation mechanism 2 includes a model box 21. A vertical baffle is fixedly installed in the middle of the model box 21. A storage bin 22 is slidably clamped on one side of the vertical baffle. A sliding partition 23 penetrates horizontally through the vertical baffle. After the sliding partition 23 penetrates the vertical baffle, the storage bin 22 is divided into an upper space and a lower space. One side of the sliding partition 23 is fixedly connected to an electric traction assembly 24; The upper space of the storage bin 22 is filled with multiple layers of filling materials, and the lower space of the storage bin 22 is filled with water; The filling simulation mechanism 2 is fixedly installed on the centrifuge 1; Among them: The size of the model box 21 is: 1.0 m (length) × 0.4 m (width) × 0.8 m (height).

[0015] As can be seen from the above, when the centrifuge 1 is started and gradually increased to a preset centrifugal acceleration such as 100g, the electric traction assembly 24 drives the sliding partition 23 to be horizontally pulled out from the storage bin 22; at this time, the multiple layers of filling materials in the upper space of the storage bin 22 quickly fall into the water in the lower space through the opening of the sliding partition 23 under the action of centrifugal force, simulating the underwater filling process.

[0016] As Figure 5 shown: Embodiment 2: This embodiment is basically the same as the previous embodiment, except that a guide wheel 25 and a limit plate 26 are further provided inside the storage bin 22; The sliding partition 23 is located between the guide wheel 25 and the limit plate 26; Among them, the guide wheel 25 can reduce friction, and cooperate with the limit plate 26 to limit the sliding partition plate 23.

[0017] Specifically, the electric traction assembly 24 includes an electric telescopic rod 241. The output end of the electric telescopic rod 241 is fixedly connected with a traction steel wire rope 242, and the end of the traction steel wire rope 242 is fixedly connected to the sliding partition plate 23. A fixed pulley 27 is also fixedly installed on the model box 21, and the traction steel wire rope 242 changes its direction through the fixed pulley 27. A fixing frame 28 is also fixedly installed on the model box 21, and the electric telescopic rod 241 is fixedly installed on the fixing frame 28.

[0018] Specifically, the model of the centrifuge 1 is CKY-200.

[0019] As can be seen from the above, during the working process, the guide wheel 25 and the limit plate 26 restrict the movement track of the sliding partition plate 23 to ensure its stable sliding. The fixing frame 28 fixes the position of the electric telescopic rod 241. During the sedimentation process of the filled material, the displacement field sensor can be used to record data in real time. After the centrifuge 1 runs stably for 30 - 40 minutes, it stops. Finally, the test is completed by measuring the volume and relative density of the filled material.

[0020] Embodiment 3: A test method using the underwater filling simulation device in a centrifugal field as described above further includes the following steps: Step 1: Weigh the filled gravel material according to the designed gradation, and after air-drying and sun-drying, lay it in layers into the storage bin. Step 2: Lift the storage bin into the model box. Step 3: Lift the model box into the chamber of the centrifuge. Step 4: After carrying out weight balance and safety inspection on the centrifuge, gradually increase the centrifugal acceleration to the preset value of 100g and keep it stable. Step 5: Drive the sliding partition plate to pull out through the electric traction assembly, so that the filled material simulates the underwater filling process under the action of the centrifugal field, and record the sedimentation data of the filled material at the same time. Step 6: After running stably for 30 - 40 minutes, stop the machine, observe the distribution and structural changes of the filled material in the model box, and measure the volume and relative density of the filled material. Step 7: Remove the model box and complete the analysis and recording of the test data.

[0021] All standard parts used in the present invention can be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts a conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0022] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0025] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0026] In the accompanying drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Underwater dumping simulation device in a centrifugal field, characterized in that, It includes a centrifuge (1) and a throwing and filling simulation mechanism (2): The throwing and filling simulation mechanism (2) includes a model box (21). A vertical baffle is fixedly installed in the middle of the model box (21). A storage box (22) is slidably clamped on one side of the vertical baffle. A sliding partition plate (23) transversely penetrates through the vertical baffle. After the sliding partition plate (23) penetrates through the vertical baffle, the storage box (22) is divided into an upper space and a lower space. An electric traction assembly (24) is fixedly connected to one side of the sliding partition plate (23); Multiple layers of throwing and filling materials are contained in the upper space of the storage box (22), and water is contained in the lower space of the storage box (22); The throwing and filling simulation mechanism (2) is fixedly installed on the centrifuge (1).

2. The underwater dumping simulation device in a centrifugal field according to claim 1, wherein Guide wheels (25) and limit plates (26) are further arranged inside the storage box (22); The sliding partition plate (23) is located between the guide wheels (25) and the limit plates (26).

3. The underwater dumping simulation device in a centrifugal field according to claim 1, wherein The electric traction assembly (24) includes an electric telescopic rod (241). The output end of the electric telescopic rod (241) is fixedly connected with a traction steel wire rope (242). The end of the traction steel wire rope (242) is fixedly connected with the sliding partition plate (23); A fixed pulley (27) is further fixedly installed on the model box (21). The traction steel wire rope (242) changes its direction through the fixed pulley (27); A fixed frame (28) is further fixedly installed on the model box (21). The electric telescopic rod (241) is fixedly installed on the fixed frame (28).

4. The underwater dumping simulation device in a centrifugal field according to claim 3, wherein The model of the centrifuge (1) is CKY-200.

5. A test method using the underwater dumping simulation device in a centrifugal field as described in any one of claims 1-4, characterized in that, It also includes the following steps: Step 1: Weigh the throwing and filling gravel materials according to the designed gradation, and layer them into the storage box after air drying and sun drying; Step 2: Lift the storage box into the model box; Step 3: Lift the model box into the machine room of the centrifuge; Step 4: After carrying out counterweight balance and safety inspection on the centrifuge, gradually increase the centrifugal acceleration to the preset value of 100g and keep it stable; Step 5: Drive the sliding partition plate to be pulled out through the electric traction assembly, so that the throwing and filling materials simulate the underwater throwing and filling process under the action of the centrifugal field, and record the settlement data of the throwing and filling materials at the same time; Step 6: Stop the machine after stable operation for 30 - 40 minutes, observe the distribution and structural changes of the throwing and filling materials in the model box, and measure the volume and relative density of the throwing and filling materials; Step 7: Remove the model box to complete the analysis and recording of the test data.

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