An experimental device and experimental method for testing the structural stability of a gas storage cavern

Abstract

The application provides a kind of experimental device and experimental method for testing the stability of gas storage cavern structure, comprising: cavern model, pressurizing equipment, data acquisition equipment and data receiving equipment;The cavern model comprises outer steel cylinder, sealed inner steel cylinder and filling body, the inner steel cylinder is arranged in the inner part of outer steel cylinder, and the outer wall of the two end parts of inner steel cylinder is arranged between the inner wall of the two end parts of outer steel cylinder with filling body;The pressurizing equipment is connected with the inner steel cylinder, for applying pressure to the inner steel cylinder;The input end of data acquisition equipment is connected with multiple preset positions on the inner steel cylinder and outer steel cylinder respectively, for collecting monitoring data at each preset position;The output end of data acquisition equipment is connected with data receiving equipment, for transmitting the collected monitoring data to data receiving equipment.The application can verify the stability and feasibility of wave arch steel lining as high-pressure gas storage cavern.

Description

Technical Field

[0001] This application relates to the field of tunnel and underground engineering technology, and in particular to an experimental device and method for testing the structural stability of underground gas storage caverns. Background Technology

[0002] Large-scale energy storage technology is a key technology for solving the problems of wind and solar curtailment, significantly improving the absorption of renewable energy, promoting the shift of the main energy source from fossil fuels to renewable energy, and achieving "carbon peaking" and "carbon neutrality". Among them, compressed air energy storage is considered the most promising physical energy storage technology, with characteristics such as large scale, low cost, long lifespan, and environmental friendliness. Moreover, it involves the storage and conversion of multiple energy forms, including cold, heat, and electricity, and is easy to couple with various thermal systems, thereby improving the flexibility of operation and increasing system efficiency.

[0003] Tunnel energy storage utilizes underground gas storage caverns to store high-pressure air. To prevent air leakage within the tunnel, a fully enclosed steel plate lining is typically installed. The air pressure inside the cavern can reach 10 MPa. Under such high pressure, the steel plate lining of the gas storage cavern will bear enormous tensile stress. Therefore, in existing technologies, to prevent the steel plate lining from cracking, a recent approach has been proposed to improve its deformation capacity by incorporating corrugated arches within the steel plates and placing rubber within these arches. Thus, to verify the stability of the gas storage cavern structure constructed using the above approach, proposing an experimental device and method for testing the stability of the gas storage cavern structure is a problem urgently needing to be solved in this field. Summary of the Invention

[0004] In view of this, the present invention provides an experimental apparatus and method for testing the structural stability of a gas storage cavern, thereby verifying the stability and feasibility of using corrugated steel lining as a high-pressure gas storage cavern.

[0005] The technical solution of this invention is implemented as follows:

[0006] An experimental apparatus for testing the structural stability of a gas storage cavern includes: a cavern model, a pressurization device, a data acquisition device, and a data receiving device;

[0007] The cavern model includes an outer steel cylinder, a sealed inner steel cylinder, and a filling material. The inner steel cylinder is located inside the outer steel cylinder, and the filling material is provided between the outer walls of the two ends of the inner steel cylinder and the inner walls of the two ends of the outer steel cylinder.

[0008] The pressurizing device is connected to the inner steel cylinder and is used to apply pressure to the inner steel cylinder;

[0009] The input end of the data acquisition device is connected with a plurality of preset positions on the inner steel cylinder and the outer steel cylinder respectively, for acquiring monitoring data at each preset position; the output end of the data acquisition device is connected with the data receiving device, for transmitting the acquired monitoring data to the data receiving device.

[0010] The data receiving device is used for analyzing and / or displaying the received monitoring data.

[0011] Preferably, the inner steel cylinder comprises a cylinder body, an inner steel cylinder end plate and a rubber filling strip.

[0012] The cylinder body comprises a plurality of inner steel cylinder ring segments, which are connected with each other in the axial direction to form a cylinder body of a preset length; each inner steel cylinder ring segment comprises a plurality of arc-shaped steel plates with wave arches, which are circumferentially spliced to form an inner steel cylinder ring segment.

[0013] The inner steel cylinder end plate has the same shape as the cross-sectional shape of the cylinder body, and is sealingly arranged at the two ends of the cylinder body respectively.

[0014] The rubber filling strip is arranged in the groove formed by the wave arches in the axial direction.

[0015] Preferably, a steel plate ring and a rubber ring are circumferentially arranged on the outer side wall of each end portion of the cylinder body and located in the preset gap between the outer steel cylinder and the inner steel cylinder, the inner side surface of the steel plate ring and the inner side surface of the rubber ring respectively abut against the outer side wall of the inner steel cylinder and the outer side wall of the rubber filling strip, the outer side surface of the steel plate ring and the outer side surface of the rubber ring respectively abut against the inner side wall of the outer steel cylinder, and along the axial direction of the cylinder body, the outer end of each steel plate ring is flush with the end portion of the cylinder body, and the inner end of the steel plate ring abuts against the outer end of the rubber ring.

[0016] Preferably, each rubber filling strip has an inverted bevel at the two end portions, and a filling body is arranged on the outer side of the inverted bevel.

[0017] Preferably, a through hole is arranged at the center position of the inner steel cylinder end plate, and a screw thread is arranged at the through hole.

[0018] Preferably, the outer steel cylinder comprises a cylinder body and an outer steel cylinder end plate, wherein the cylinder body is formed by rolling and welding a steel plate; and the outer steel cylinder end plates are fixedly connected at the two ends of the cylinder body respectively.

[0019] Preferably, a pressurizing pipe is reserved in the filling body at the first end of the cavern model, one end of the pressurizing pipe is sealingly connected with the through hole in the inner steel cylinder end plate at the end through a screw thread, and the other end of the pressurizing pipe penetrates out of the outer steel cylinder end plate and is connected with a pressurizing device through a connecting pipeline.

[0020] Preferably, the filling body of the second end of the chamber model is reserved with an exhaust pipe, the first end of the exhaust pipe is arranged at the top of the inner steel cylinder, the second end of the exhaust pipe passes through the through hole of the end plate of the inner steel cylinder and the side wall of the outer steel cylinder to connect with the outside, and the second end of the exhaust pipe is provided with a ball valve.

[0021] Preferably, the input end of the data acquisition device is connected with a plurality of longitudinal strain gauges, circumferential strain gauges and radial displacement meters arranged at the preset positions of the chamber model through data lines.

[0022] An experimental method for testing the structural stability of a gas storage chamber, comprising the following steps:

[0023] Step A: determining the corresponding parameter data of the inner steel cylinder of the chamber model according to the design parameters of the steel plate lining of the actual gas storage chamber;

[0024] Step B: manufacturing the inner steel cylinder according to the parameter data of the inner steel cylinder and installing the entire experimental device for testing the structural stability of the gas storage chamber;

[0025] Step C: applying a preset pressure value to the inner steel cylinder by using the pressurizing device, collecting the monitoring data at the corresponding positions of the chamber model by using the data acquisition device, transmitting the collected monitoring data to the data receiving device, and analyzing and / or displaying the received monitoring data by using the data receiving device;

[0026] Step D: depressurizing the inner steel cylinder by using the pressurizing device and pressurizing again, and repeatedly performing the pressurizing and depressurizing experiment to analyze the stress and deformation conditions of the inner steel cylinder.

[0027] As can be seen from the above, in the experimental device and experimental method for testing the structural stability of the gas storage chamber in the present application, the steel plate lining of the actual gas storage chamber is scaled down according to the similarity theory, the stress and deformation conditions of the steel plate lining in the process of repeated pressurization and depressurization are simulated, so that the stability and feasibility of the wave arch steel plate lining as the sealing layer of the high-pressure gas storage chamber can be verified; further, through the cyclic loading experimental data, whether the design intention is completely realized can be judged by analyzing the regularity of the experimental test results, which provides a reference for the wave arch design calculation theory and the improvement of the later manufacturing and processing technology; the basic technical information of the stress and strain of the wave arch steel plate lining structure can also be collected, the technical file of the flexible steel plate lining structure is established, and technical support is provided for the later engineering design and implementation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is a structural schematic diagram of the experimental device for testing the structural stability of the gas storage chamber in the embodiment of the present application.

[0029] Figure 2 The figure is a structural schematic diagram of the chamber model in the embodiment of the present application.

[0030] Figure 3 A cross-sectional view of the inner steel cylinder in the embodiment of the present application.

[0031] Figure 4 A schematic view of the connection of the inner steel cylinder, rubber filling strip and outer steel cylinder in the embodiment of the present application.

[0032] Figure 5 A longitudinal sectional view of the end of the inner steel cylinder in the embodiment of the present application.

[0033] Figure 6 A schematic view of the structure of the end plate of the inner cylinder body in the embodiment of the present application.

[0034] Figure 7 A schematic view of the structure of the hoop reinforcement in the embodiment of the present application.

[0035] Figure 8 A schematic view of the connection of the data acquisition device and the inner steel cylinder in the embodiment of the present application.

[0036] Figure 9 A schematic view of the connection of the data acquisition device and the outer steel cylinder in the embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the technical solutions and advantages of the present application clearer and more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] As shown in Figures 1 to 7 , the present application provides an experimental device for testing the structural stability of a gas storage cavern, comprising: a cavern model 1, a pressurizing device 2, a data acquisition device 3 and a data receiving device 4.

[0039] The cavern model 1 comprises an outer steel cylinder 12, a sealed inner steel cylinder 11 and a filling body 13, the inner steel cylinder 11 is arranged inside the outer steel cylinder 12, and the filling body 13 is arranged between the outer wall of the two end portions of the inner steel cylinder 11 and the inner wall of the two end portions of the outer steel cylinder 12.

[0040] The pressurizing device 2 is connected with the inner steel cylinder 11 and is used to apply pressure to the inner steel cylinder 11.

[0041] The input end of the data acquisition device 3 is connected with a plurality of preset positions on the inner steel cylinder 11 and the outer steel cylinder 12 respectively, and is used to acquire monitoring data at each preset position; the output end of the data acquisition device 3 is connected with the data receiving device 4, and is used to transmit the acquired monitoring data to the data receiving device 4.

[0042] The data receiving device 4 is used to analyze and / or display the received monitoring data.

[0043] In the technical scheme of the present application, the inner steel cylinder 11 simulates the steel lining of the cavern, and the pressure equipment 2 is used to apply pressure to the inner steel cylinder 11 to simulate the effect of the steel lining when the cavern stores high-pressure air. In addition, in order to ensure that the deformation of the inner steel cylinder 11 is controllable during internal pressurization, an outer steel cylinder for protection is arranged outside the inner steel cylinder, and a filler is arranged between the inner steel cylinder and the outer steel cylinder to ensure the reliability of the connection between the inner steel cylinder and the outer steel cylinder. At the same time, the input end of the data acquisition equipment 3 is connected to a plurality of preset positions on the inner steel cylinder and the outer steel cylinder, respectively, so that the deformation and stress of the inner steel cylinder and the outer steel cylinder can be monitored in real time, and then the monitored data can be transmitted to the data receiving equipment 4 for observation and further analysis by the staff.

[0044] In the technical scheme of the present application, the test cavern structure stability experimental device can be realized by using various implementation methods. One of the implementation methods will be described in detail below.

[0045] For example, preferably, in one embodiment of the present application, as shown in Figures 2 to 4 The inner steel cylinder 11 can include a cylinder body, an inner steel cylinder end plate 113 and a rubber filling strip 112.

[0046] The cylinder body includes a plurality of inner steel cylinder ring segments, which are connected to each other in the axial direction to form a cylinder body of a predetermined length; each inner steel cylinder ring segment includes a plurality of arc-shaped steel plates 111 with wave arches, which are circumferentially spliced to form an inner steel cylinder ring segment.

[0047] The inner steel cylinder end plate 113 has the same shape as the cross-sectional shape of the cylinder body, and is sealingly arranged at the two ends of the cylinder body, respectively.

[0048] The rubber filling strip 112 is arranged in the groove formed by the wave arches in the axial direction, respectively.

[0049] In the technical scheme of the present application, different thicknesses of arc-shaped steel plates 111 can be used according to different experimental groups, for example, four arc-shaped steel plates 111 with a thickness of 3mm or 6mm can be circumferentially welded in sequence to form an inner steel cylinder ring segment; and three inner steel cylinder ring segments are sequentially welded in the axial direction of the cylinder body to form an inner steel cylinder with a total length of 2.94m; three-ethylene-propylene rubber is used as a rubber filling strip to fill and support the wave arches at the wave arch positions; inner steel cylinder end plates 113 with a thickness of 10mm are arranged at the two ends of the cylinder body, respectively, and a predetermined pressure is applied to the inner steel cylinder by the pressure equipment, and the stress and deformation of the inner steel cylinder and the outer steel cylinder are monitored.

[0050] In addition, as an example, in a preferred embodiment of the present application, a predetermined gap can be provided between the outer sidewall of the inner steel cylinder 11 and the inner sidewall of the outer steel cylinder 12, so that the inner steel cylinder can be controlled to expand outwardly under the action of internal pressure.

[0051] In addition, as an example, in a preferred embodiment of the present application, as shown in Figure 5 the outer sidewall of each of the rubber filling strips 112 is provided with a filling body 13.

[0052] In addition, as an example, in a preferred embodiment of the present application, as shown in Figure 5 the outer sidewall of each of the rubber filling strips 112 is provided with a filling body 13.

[0053] Since the inner steel cylinder is a flexible body, the cylinder body itself can freely expand outwardly by 5mm in the axial direction, but since the inner steel cylinder end plate 113 is welded at both ends thereof, the end portions of the cylinder body are rigidly constrained, which is easy to damage the two end portions of the inner steel cylinder. Therefore, the inner steel cylinder needs to realize a flexible constraint transition from the middle portion to the end portion. In the technical solution of the present application, the steel plate ring 18 and the rubber ring 19 are arranged side by side on the outer sidewall of the two end portions of the inner steel cylinder, with the rubber ring inside and the steel plate ring outside, so that during the axial expansion of the inner steel cylinder, the soft and hard transition can be realized by the rubber ring 19 and the steel plate ring 18; at the same time, the two end portions of the rubber filling strip 112 are provided with a reverse bevel, and are connected with the filling body 13, so that during the axial expansion of the inner steel cylinder, the soft and hard transition can be further realized by the rubber filling strip 112 and the filling body 13, thereby ensuring the safety and reliability of the cavity model during the test.

[0054] Preferably, as an example, the filling body 13 can be concrete.

[0055] In addition, as an example, in a preferred embodiment of the present application, as shown in Figure 2 and Figure 6 the center of the inner steel cylinder end plate 113 can be provided with a through hole, and the through hole is provided with a screw thread 17.

[0056] In addition, as an example, in a preferred embodiment of the present application, as shown in Figure 2 and Figure 6As shown in the figure, the outer surface of each inner steel cylinder end plate 113 is provided with a plurality of rivets 16 for reinforcing the connection between the inner steel cylinder 11 and the filler 13.

[0057] For example, preferably, in one embodiment of the present application, as shown in the figure, Figure 2 and Figure 7 As shown in the figure, the outer steel cylinder 12 can include a cylinder body and outer steel cylinder end plates 122, wherein the cylinder body is rolled and welded from steel plates; the outer steel cylinder end plates 122 are fixedly connected at both ends of the cylinder body.

[0058] Preferably, as an example, as shown in the figure, Figure 2 The inner surface of the outer steel cylinder end plate 122 is provided with a plurality of rivets 16; the inner side wall of the outer cylinder body between the inner steel cylinder end plate 113 and the outer steel cylinder end plate 122 is provided with a plurality of rivets 16 for reinforcing the reliability of the connection between the outer cylinder body and the filler 13.

[0059] In addition, as an example, in one preferred embodiment of the present application, as shown in the figure, Figure 1 and Figure 2 As shown in the figure, the filler 13 at the first end of the cavern model 1 is pre-provided with a pressurizing pipe 14, one end of the pressurizing pipe 14 is sealingly connected to the through hole in the inner steel cylinder end plate at the end through a thread, the other end of the pressurizing pipe 14 penetrates out of the outer steel cylinder end plate 122 and is connected to the pressurizing device 2 through a connecting pipeline 23, so that the pressurizing device 2 can pressurize or depressurize the inner steel cylinder through the connecting pipeline 23 and the pressurizing pipe 14.

[0060] Preferably, as an example, as shown in the figure, Figure 1 The connecting pipeline 23 between the pressurizing pipe 14 and the pressurizing device 2 can be provided with at least one pressure gauge 22.

[0061] Preferably, as an example, a ball valve 24 can also be provided on the connecting pipeline for adjusting the pressurizing speed.

[0062] Preferably, as an example, the pressurizing device 2 can be an electric pressure test pump, which can inject water into the inner steel cylinder 11 through the pressurizing pipe, simulate air pressure by using water pressure, and realize pressurizing and depressurizing operations.

[0063] In addition, as an example, in one preferred embodiment of the present application, as shown in the figure, Figure 2 As shown in the figure, the filler 13 at the second end of the cavern model 1 is pre-provided with an exhaust pipe 15, the first end of the exhaust pipe 15 is arranged at the top end inside the inner steel cylinder 11, the second end of the exhaust pipe 15 penetrates out of the through hole in the inner steel cylinder end plate at the end and penetrates out of the side wall of the outer steel cylinder 12 to communicate with the outside, and the second end of the exhaust pipe 15 is provided with a ball valve 25.

[0064] In the technical scheme of the present application, when conducting the experiment, the electric pressure pump injects water into the inner steel cylinder 11 through the pressurizing pipe 14. At this time, the ball valve 25 on the second end of the exhaust pipe 15 is opened. Since the water flows to the bottom of the inner steel cylinder 11 and the water level rises continuously, the air in the inner steel cylinder is expelled to the top of the inner steel cylinder. Since the first end of the exhaust pipe 15 is arranged at the top end inside the inner steel cylinder 11, the air in the inner steel cylinder can be discharged to the outside through the exhaust pipe until water begins to flow out of the exhaust pipe, indicating that the water in the inner cylinder has been filled. At this time, the ball valve 25 on the second end of the exhaust pipe 15 is closed. When water is further injected into the inner steel cylinder, the water pressure in the inner steel cylinder will increase, thereby simulating the air pressure.

[0065] In addition, as an example, in a preferred embodiment of the present application, as shown in Figure 7 the outer side wall of the outer steel cylinder 12 can be provided with a plurality of annular reinforcing ribs 121 to prevent excessive deformation of the outer steel cylinder 12.

[0066] Preferably, as an example, the outer steel cylinder 12 is provided with grouting holes and wire outlets.

[0067] In addition, as an example, in a preferred embodiment of the present application, the input end of the data acquisition device 3 can be connected to a plurality of longitudinal strain gauges 32, annular strain gauges 31 and radial displacement meters 33 arranged at predetermined positions of the cavern model 1 through data lines.

[0068] For example, preferably, in a preferred embodiment of the present application, as shown in Figure 8 the outer side of the wave arch on the arc-shaped steel plate at the axial middle position of the inner steel cylinder 11, between the arc-shaped steel plate 111 and the rubber filling strip 112, is provided with a plurality of annular strain gauges 31 for measuring the annular strain of the wave arch, and the stress at the corresponding position can be calculated further through the strain and transmitted to the data acquisition instrument through the data line.

[0069] For another example, preferably, in a preferred embodiment of the present application, as shown in Figure 9 the outer surface of the outer steel cylinder 12 at the middle position and the position 0.8 m away from the end of the outer steel cylinder 12, at the upper left corner, the lower left corner, the upper right corner and the lower right corner of the cross section, annular strain gauges 31 and radial displacement meters 33 are arranged respectively, and longitudinal strain gauges 32 are arranged at the upper left corner and the upper right corner of the cross section respectively. Through the above arrangement, the annular and longitudinal strain and stress of the outer steel cylinder can be monitored in real time, and the radial deformation of the outer steel cylinder can also be monitored, thereby observing and analyzing the stability of the cavern model in multiple dimensions.

[0070] In addition, as an example, in a preferred embodiment of the present application, as shown inFigure 1 As shown, the experimental device can further include a protective wall 100.

[0071] Preferably, as an example, the protective wall can be a wall made of a steel frame and support, a corrugated steel plate partition wall and a sandbag shelter, which protects the cavern model and reduces the influence of the outside environment on the experiment.

[0072] In addition, as an example, in a preferred embodiment of the present application, the data receiving device 4 can be a notebook computer for analyzing and displaying the received monitoring data.

[0073] In summary, in the technical scheme of the present application, by reasonably designing the experimental device for testing the structural stability of the gas storage cavern, the variability and stability of the wave-arch type steel lining of the gas storage cavern under the preset air internal pressure can be verified by using the experimental device, and the deformation law and stress characteristics of the wave-arch type steel lining are ascertained.

[0074] In addition, in another embodiment of the present application, the present application further provides an experimental method for testing the structural stability of the gas storage cavern, comprising the following steps:

[0075] Step 101, according to the design parameters of the steel lining of the actual gas storage cavern, determining the corresponding parameter data of the inner steel cylinder of the cavern model;

[0076] In the technical scheme of the present application, according to the similarity theory, engineering characteristics and test conditions, in order to ensure the consistency of the properties of the model material (steel, rubber, etc.), the corresponding parameter data of the inner steel cylinder can be determined according to the thickness, length dimension, arch wave geometric size and density dimension of the steel lining of the actual gas storage cavern.

[0077] For example, in one embodiment of the present application, for a relatively thin steel lining of the actual gas storage cavern, the thickness of the actual gas storage cavern can be reduced by 0.5 times, the length dimension can be reduced by 0.5 times, the arch wave geometric size can be reduced by 1 times, and the density dimension can be increased by 2 times to make the inner steel cylinder, so as to ensure that the stress condition and deformation condition of the inner steel cylinder are consistent with the gas storage cavern under the same internal pressure by using the reduced scale experiment.

[0078] For example, in another embodiment of the present application, for a relatively thick steel lining of the actual gas storage cavern, the thickness of the actual gas storage cavern can be reduced by 0.4 times, the length dimension can be reduced by 0.4 times, the arch wave geometric size can be reduced by 1 times, and the density dimension can be increased by 2.5 times to make the inner steel cylinder.

[0079] Step 102, according to the parameter data of the inner steel cylinder, making the inner steel cylinder, and installing the entire experimental device for testing the structural stability of the gas storage cavern;

[0080] In step 103, the preset pressure value is applied to the inner steel cylinder by using the pressurizing device, meanwhile, the monitoring data at the corresponding position on the cavern model is collected by the data collection device, and the collected monitoring data is transmitted to the data receiving device, and the received monitoring data is analyzed and / or displayed by using the data receiving device.

[0081] Preferably, in one specific embodiment of the present application, the preset pressure value can be a cyclic load of 4-10.5 MPa (the maximum overpressure can be 12 MPa), so that the strain and stress of the inner steel cylinder can be consistent with the actual gas storage cavern steel lining.

[0082] In addition, as an example, in one specific embodiment of the present application, the application of the preset pressure value to the inner steel cylinder by using the pressurizing device can include the following steps:

[0083] In step 31, the ball valve 25 at the second end of the exhaust pipe is opened,

[0084] In step 32, water is injected into the inner steel cylinder 11 by using the pressurizing device 2 through the pressurizing pipe 14, until water flows out from the second end of the exhaust pipe;

[0085] In step 33, the ball valve 25 at the second end of the exhaust pipe is closed, and water continues to be injected into the inner steel cylinder 11 by using the pressurizing device 2, until the pressure in the inner steel cylinder 11 reaches the preset pressure value.

[0086] In step 104, the inner steel cylinder is depressurized and pressurized again by using the pressurizing device, and the pressurizing and depressurizing experiment is performed multiple times to analyze the stress and deformation of the inner steel cylinder.

[0087] In summary, in the technical solution of the present application, the actual gas storage cavern steel lining is scaled down according to the similarity theory, the stress and deformation of the steel lining in the process of repeated pressurization and depressurization are simulated, so that the feasibility and reliability of the wave-arch steel lining as a sealing layer of the high-pressure gas storage cavern can be verified; further, through the cyclic loading experiment data, whether the design intention is completely achieved can be judged by analyzing the regularity of the experimental test results, which provides a reference for the wave-arch design calculation theory and the improvement of the later manufacturing and processing technology; the stress and strain of the wave-arch steel lining structure and other basic technical information can also be collected, a flexible steel lining structure technical file is established, and technical support is provided for the later engineering design and implementation.

[0088] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An experimental apparatus for testing the stability of a gas storage cavern structure, characterized by, The application relates to a cavity model, a pressurizing device, a data acquisition device and a data receiving device. The cavity model comprises an outer steel cylinder, a sealed inner steel cylinder and a filling body, the inner steel cylinder is arranged in the inner part of the outer steel cylinder, and the filling body is arranged between the outer wall of the two end parts of the inner steel cylinder and the inner wall of the two end parts of the outer steel cylinder. The inner steel cylinder comprises a cylinder body, an inner steel cylinder end plate and a rubber filling strip. The cylinder body comprises a plurality of inner steel cylinder ring segments which are connected in the axial direction, and each inner steel cylinder ring segment is formed by a plurality of arc-shaped steel plates with wave arches which are spliced in the ring direction. The rubber filling strip is arranged in the groove formed by the wave arches in the axial direction. The outer steel cylinder comprises a cylinder body and an outer steel cylinder end plate, and a plurality of rivets are arranged on the inner surface of the outer steel cylinder end plate; a plurality of rivets are arranged on the inner side wall of the outer cylinder body between the inner steel cylinder end plate and the outer steel cylinder end plate. The pressurizing device is connected with the inner steel cylinder and is used for applying pressure to the inner steel cylinder. The input end of the data acquisition device is connected with a plurality of longitudinal strain gauges, ring direction strain gauges and radial displacement meters arranged at the preset positions of the cavity model through data lines. The data receiving device is used for analyzing and / or displaying the received monitoring data. ​ 2. The experimental apparatus for testing the structural stability of a gas storage cavern according to claim 1, wherein ​ ​ 3. The experimental apparatus for testing the stability of a gas storage cavern according to claim 2, wherein ​ 4. The experimental apparatus for testing the structural stability of a gas storage cavern according to claim 1, wherein ​ 5. The experimental apparatus for testing the stability of a gas storage cavern according to claim 2, wherein ​ 6. The experimental apparatus for testing the stability of a gas storage cavern according to claim 5, wherein ​ 7. The experimental apparatus for testing the stability of a gas storage cavern according to claim 6, wherein ​ 8. The experimental apparatus for testing the structural stability of a gas storage cavern according to claim 6, wherein ​ 9. The experimental apparatus for testing the structural stability of a gas storage cavern according to claim 1, wherein ​ 10. An experimental method for testing the stability of a gas storage cavern structure using the experimental apparatus according to any one of claims 1 to 9, characterized by, The method comprises the following steps: Step A, determining the corresponding parameter data of the inner steel cylinder of the cavern model according to the design parameters of the steel lining of the actual gas storage cavern; Step B, manufacturing the inner steel cylinder according to the parameter data of the inner steel cylinder, and installing the experimental device for testing the structural stability of the entire gas storage cavern; Step C, applying a preset pressure value to the inner steel cylinder by using a pressurizing device, collecting monitoring data at corresponding positions on the cavern model by using a data collection device, transmitting the collected monitoring data to a data receiving device, and analyzing and / or displaying the received monitoring data by using the data receiving device; Step D, depressurizing the inner steel cylinder by using the pressurizing device, and pressurizing again, and performing the pressurizing and depressurizing experiment for multiple times to analyze the stress and deformation conditions of the inner steel cylinder.

Images