An underground gas storage and method of arrangement

Abstract

The application discloses an underground gas storage and a layout method, belongs to the technical field of compressed air energy storage, and can solve the problem that the tensile property of a concrete lining layer is poor and the lining layer is easily damaged under the action of internal stress in the prior art. The gas storage comprises an underground cavern, a lining layer arranged on the inner side of a cavern wall of the underground cavern, wherein the lining layer is formed by surrounding a plurality of concrete lining blocks, a sealing layer arranged on the inner side of the lining layer, wherein the sealing layer and the lining layer are annular, and a connecting assembly arranged on the plurality of concrete lining blocks and used for movably connecting two adjacent concrete lining blocks. The application is used for constructing the underground gas storage.

Description

Technical Field

[0001] This invention relates to an underground gas storage facility and its layout method, belonging to the field of compressed air energy storage technology. Background Technology

[0002] An underground compressed air storage facility refers to a gas storage system that utilizes underground spaces such as natural caverns, salt caverns, or deep rock pores to store and compress air. The core task in constructing an underground gas storage facility is to ensure the airtightness of the storage facility and the safety of the cavern structure.

[0003] Currently, underground gas storage facilities mostly use steel plates as the sealing layer, and then pour concrete integrally outside the sealing layer to form a lining layer that supports the sealing layer. Because the gas inside the storage facility operates under high pressure, exceeding 10 MPa, the sealing layer, lining layer, and surrounding rock will deform under the influence of this high pressure. The deformation is related to the strength of the surrounding rock; when the strength of the surrounding rock is low, the deformation of the sealing layer, lining layer, and surrounding rock is relatively large.

[0004] Because concrete has poor tensile strength, it is prone to cracking when the lining layer undergoes significant deformation. These cracks are dense and wide, severely impacting the stability of underground gas storage facilities. As the cracks widen and deepen, the lining layer can eventually fracture under tension, causing the sealing layer to lose support and leading to gas leakage. Therefore, existing technologies suffer from the drawback of poor tensile strength in concrete lining layers, making them highly susceptible to failure under internal stress. Summary of the Invention

[0005] This invention provides an underground gas storage facility and its layout method, which can solve the problem that the concrete lining layer has poor tensile strength and is easily damaged under internal stress in the prior art.

[0006] On one hand, the present invention provides an underground gas storage facility, the gas storage facility comprising:

[0007] Underground caverns;

[0008] A lining layer is provided on the inner side of the cavern wall of the underground cavern, and the lining layer is composed of multiple concrete lining blocks.

[0009] A sealing layer is provided on the inner side of the lining layer, and both the sealing layer and the lining layer are annular;

[0010] A connecting component, disposed on multiple concrete lining blocks, is used to movably connect two adjacent concrete lining blocks.

[0011] Optionally, two adjacent concrete lining blocks have opposing first joint surfaces and second joint surfaces, and the first joint surface is provided with a plurality of first insertion holes; the connecting assembly includes:

[0012] Multiple first connecting rods, one end of which is fixed to the second joint surface, and the other end is respectively inserted into multiple first insertion holes.

[0013] Optionally, the second joint surface is provided with a plurality of second insertion holes; the connection assembly further includes:

[0014] Multiple second connecting rods, one end of which is fixed to the first joint surface, and the other end is respectively inserted into multiple second insertion holes.

[0015] Optionally, the connection component further includes:

[0016] Multiple guide tubes are inserted into multiple first insertion holes and multiple second insertion holes; multiple first connecting rods and multiple second connecting rods are respectively inserted into multiple guide tubes;

[0017] Multiple telescopic components are respectively inserted into multiple guide tubes. One end of each telescopic component is fixed to the bottom of multiple first insertion holes and multiple second insertion holes, and the other end is respectively connected to multiple first connecting rods and multiple second connecting rods.

[0018] Optionally, the ratio of the number of concrete lining blocks to the inner diameter of the lining layer is less than or equal to 1.6.

[0019] Optionally, the sealing layer is a double-layer hollow multi-ribbed structure, and the sealing layer has multiple buffer portions protruding to both sides, and the multiple buffer portions correspond to multiple joint positions in the lining layer.

[0020] Optionally, the gas storage facility further includes:

[0021] A flexible adaptive layer is disposed between the sealing layer and the lining layer.

[0022] Optionally, the method includes:

[0023] S1. Determine the maximum pressure that the sealing layer can withstand based on the structural and material parameters of the sealing layer;

[0024] S2. Calculate the difference between the design total pressure of the gas storage tank and the maximum pressure to obtain the first pressure;

[0025] S3. Based on the parameters of the underground cavern and the lining layer, determine the number and length of the first connecting rod and / or the second connecting rod required by the lining layer under the combined action of the first pressure and the surrounding rock of the cavern.

[0026] Optionally, the process may further include the following before step S2:

[0027] Calculate the ratio of the maximum pressure to the total pressure to obtain the air pressure ratio of the sealing layer;

[0028] According to the air pressure ratio design requirements, the structural parameters of the sealing layer are adjusted so that the adjusted air pressure ratio matches the air pressure ratio design requirements.

[0029] Optionally, the process may further include the following before step S3:

[0030] Based on the structural and material parameters of the sealing layer, determine the radial deformation of the sealing layer under the maximum pressure.

[0031] Based on the parameters of the flexible adaptive layer, determine the compressibility deformation of the flexible adaptive layer under the first pressure.

[0032] The thickness of the flexible adaptive layer is obtained by calculating the sum of the radial deformation and the compressive deformation.

[0033] The beneficial effects that this invention can produce include:

[0034] This invention increases the deformation range of the lining layer by forming a lining layer with multiple concrete lining blocks, which can release the internal stress generated by the concrete lining layer under the action of high pressure gas in a timely manner and avoid damage to the lining layer due to excessive stress.

[0035] This invention, by incorporating connecting components on the concrete lining blocks to movably connect adjacent blocks, effectively prevents misalignment between the blocks, thus ensuring the stability of the sealing layer. This improves the stress distribution on the lining layer, enhances its operational stability, and strengthens the overall stability of the gas storage facility.

[0036] This invention provides fatigue resistance to the connecting components by incorporating multiple expandable parts, thus ensuring the stability of the connecting components during repeated opening and closing of the joint.

[0037] The present invention sets a flexible adaptive layer between the sealing layer and the lining layer. On the one hand, it is beneficial to give full play to the structural characteristics of the sealing layer and the lining layer, thereby balancing the internal air pressure borne by the surrounding rock, sealing layer, lining layer and other structures of the cavern. On the other hand, it is beneficial to provide a continuous support structure for the sealing layer.

[0038] This invention sets the sealing layer as a double-layer hollow multi-ribbed plate structure, which makes the sealing layer stronger than a single-layer thin steel plate, thus enhancing the stability and load-bearing capacity of the sealing layer; at the same time, it reduces the amount of steel used compared to a single-layer thick steel plate, thus improving economy.

[0039] This invention strengthens the structural strength of the sealing layer at the joint by setting a buffer part on the sealing layer. At the same time, the buffer part can adapt to the opening and closing of the joint of the lining block, thereby effectively preventing the sealing layer from being damaged due to excessive stress at the joint and preventing the sealing layer from cracking and leaking under the high pressure and temperature change cycle of high pressure gas.

[0040] This invention effectively protects the stability of the detection equipment by setting up a gas sensor and other detection devices in the cavity of the buffer section, which facilitates the monitoring of gas leaks and makes subsequent inspection and maintenance easier.

[0041] The layout method of the present invention has a wide range of applications and can be applied to cavern surrounding rocks of different strengths, such as soft rock and hard rock. At the same time, the layout method of the present invention has high flexibility and can flexibly control the stress on the cavern surrounding rock, lining layer and sealing layer, ensuring the safety of the overall structure of the underground gas storage facility and the optimal layout, and reducing resource waste. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of an underground gas storage facility provided in an embodiment of the present invention;

[0043] Figure 2 for Figure 1 Sectional view along line A;

[0044] Figure 3 This is a structural schematic diagram of the closed state of the concrete lining block joint provided in an embodiment of the present invention;

[0045] Figure 4 A schematic diagram of the open state of the joint of the concrete lining block provided in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of the structure of the sealing layer provided in an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of the buffer section provided in an embodiment of the present invention.

[0048] List of components and reference numerals:

[0049] 1. Sprayed protective layer 1; 2. Lining layer; 21. Concrete lining block; 22. Joint; 3. Flexible adaptive layer; 4. Sealing layer; 41. Outer steel plate; 42. Inner steel plate; 43. Rib plate; 44. Buffer section; 5. Connecting assembly; 51. First connecting rod; 52. Second connecting rod; 53. Guide tube; 54. Telescopic component; 55. Threaded steel bar; 6. Waterstop plate; 7. Gas sensor. Detailed Implementation

[0050] The present invention will now be described in detail with reference to the embodiments, but the present invention is not limited to these embodiments.

[0051] This invention provides an underground gas storage facility, such as... Figures 1 to 4 The gas storage facility includes:

[0052] Underground caverns;

[0053] Lining layer 2 is located inside the cave wall of the underground cavern. Lining layer 2 is composed of multiple concrete lining blocks 21.

[0054] The sealing layer 4 is located inside the lining layer 2, and both the sealing layer 4 and the lining layer 2 are annular.

[0055] The connecting component 5 is provided on multiple concrete lining blocks 21 and is used to movably connect two adjacent concrete lining blocks 21.

[0056] This invention utilizes multiple concrete lining blocks 21 to form a lining layer 2 and sets up a connecting component 5. By taking advantage of the relative mobility reserved at the joints 22 of the lining layer 2, the tensile stress of the lining layer 2 is released as much as possible, reducing the occurrence of tensile cracks in the concrete lining layer 2 caused by excessive load. At the same time, it ensures that the joint surfaces of two adjacent concrete lining blocks 21 can remain aligned with each other during the repeated opening and closing of the joints 22, thus guaranteeing the stability of the sealing layer 4 supporting structure.

[0057] Specifically, the concrete lining block 21 can be a cast-in-place concrete lining block or a precast concrete lining block.

[0058] The present invention does not limit the number and thickness of the concrete lining blocks 21, but can set them according to comprehensive conditions such as the strength of the surrounding rock of the cavern and the design dimensions of the gas storage tank. Specifically, in this embodiment, the ratio of the number of concrete lining blocks 21 to the inner diameter of the lining layer 2 is less than or equal to 1.6, that is, the number of concrete lining blocks 21 is n, and 2≤n≤1.6R; the thickness of the concrete lining blocks 21 is H, and min{0.2m,R / 10}≤H≤R, where R is the inner diameter of the lining layer 2. Setting the number and thickness of the concrete lining blocks 21 in this way can make the lining layer 2 more stable.

[0059] Specifically, such as Figures 3 to 4 Two adjacent concrete lining blocks 21 have opposing first joint surfaces and second joint surfaces, and the first joint surface is provided with a plurality of first insertion holes; the connecting assembly 5 may include:

[0060] Multiple first connecting rods 51, one end of which is fixed to the second joint surface, and the other end is inserted into multiple first insertion holes respectively.

[0061] Specifically, such as Figures 3 to 4 The second joint surface is also provided with multiple second insertion holes; the connecting component 5 may also include:

[0062] Multiple second connecting rods 52, one end of which is fixed to the first joint surface, and the other end is inserted into multiple second insertion holes respectively.

[0063] In this embodiment, as Figures 3 to 4 Multiple first insertion holes and multiple second insertion holes are uniformly arranged along the thickness direction of the lining layer 2. Correspondingly, multiple first connecting rods 51 and multiple second connecting rods 52 are staggered and uniformly arranged along the thickness direction of the lining layer 2. In practice, when the sum of the lengths of all the distributed first connecting rods 51 and all the second connecting rods 52 along the thickness direction of the lining layer 2 on the same cross-section of the lining layer 2 is (1 / 4 to 2 / 3)H, the lining layer 2 has better stability.

[0064] In this embodiment, as Figure 2 Multiple first insertion holes and multiple second insertion holes are evenly arranged along the length of the lining layer 2. Correspondingly, multiple first connecting rods 51 and multiple second connecting rods 52 are evenly arranged in a staggered manner along the length of the lining layer 2. In practice, when the interval between all the first connecting rods 51 and all the second connecting rods 52 along the length of the lining layer 2 is 20 to 100 cm on the same longitudinal section of the lining layer 2, the lining layer 2 has better stability.

[0065] In this embodiment, both the first connecting rod 51 and the second connecting rod 52 are solid cylindrical structures made of concrete wrapped with thin steel plates.

[0066] Specifically, such as Figures 3 to 4 The connecting component 5 may also include:

[0067] Multiple guide tubes 53 are inserted into multiple first insertion holes and multiple second insertion holes; multiple first connecting rods 51 and multiple second connecting rods 52 are respectively inserted into multiple guide tubes 53;

[0068] Multiple telescopic components 54 are respectively inserted into multiple guide tubes 53. One end of each telescopic component 54 is fixed to the bottom of multiple first insertion holes and multiple second insertion holes, and the other end is connected to multiple first connecting rods 51 and multiple second connecting rods 52.

[0069] In this embodiment, the guide tube 53 is a hollow circular thin steel tube, and the telescopic component 54 is a spring.

[0070] By setting the guide tube 53 and the telescopic component 54, the friction between the first connecting rod 51 and the first connecting hole, and between the second connecting rod 52 and the second connecting hole can be reduced. At the same time, during the opening and closing of the joint 22 of the lining layer 2, the movement path of the first connecting rod 51 and the second connecting rod 52 can be pulled, making the insertion and removal process of the first connecting rod 51 and the second connecting rod 52 smoother and avoiding obstruction that would affect the closing of the joint 22.

[0071] In this embodiment, the end of the guide tube 53 away from the joint 22 is closed. Correspondingly, one end of each of the multiple telescopic members 54 is fixed to the closed end of the multiple guide tubes 53, and the other end is connected to each of the multiple first connecting rods 51 and multiple second connecting rods 52. To prevent the telescopic members 54 from pulling out the guide tube 53 when the joint 22 opens, threaded steel bars 55 are pre-embedded in the concrete lining block 21 in this embodiment. The threaded steel bars 55 are anchored in the concrete lining block 21, and one end of them is fixedly connected to the closed end of the guide tube 53, thereby more firmly fixing the guide tube 53 in the concrete lining block 21.

[0072] In this embodiment, the first connecting rod 51 and the second connecting rod 52 are of the same length. When the joint 22 is in the closed state, the sum of the lengths of the first connecting rod 51 or the second connecting rod 52, the telescopic member 54, and the threaded steel bar 55 is L. When L≥min{0.3m,πR / 4n}, the connection between the first connecting rod 51 and the second connecting rod 52 and the concrete lining block 21 is more stable.

[0073] Specifically, such as Figure 5 Sealing layer 4 is a steel-lined sealing layer with a double-layer hollow multi-ribbed structure, including:

[0074] The outer steel plate 41 is located on the inner side of the lining layer 2;

[0075] The inner steel plate 42 is located inside the outer steel plate 41; both the inner steel plate 42 and the outer steel plate 41 are annular.

[0076] Multiple ribs 43 are evenly distributed between the outer steel plate 41 and the inner steel plate 42 to connect the outer steel plate 41 and the inner steel plate 42; the thickness of the outer steel plate 41, the inner steel plate 42 and the ribs 43 are all 2 to 20 mm.

[0077] Because the sealing layer 4 is composed of an outer steel plate 41, an inner steel plate 42, and multiple inner plates, it has higher strength than a single thin steel plate, enhancing its stability and load-bearing capacity and ensuring its airtightness. At the same time, it reduces steel consumption compared to a single thick steel plate, improving economic efficiency. Furthermore, the cavity between the outer steel plate 41 and the inner steel plate 42 can accommodate detection equipment such as a gas sensor 7, facilitating monitoring of gas leaks and simplifying future inspection and maintenance.

[0078] Specifically, such as Figure 6 The sealing layer 4 also has multiple buffer portions 44 protruding to both sides, and the multiple buffer portions 44 correspond to the positions of multiple joints 22 in the lining layer 2.

[0079] By setting the buffer part 44, the structural strength of the sealing layer 4 at the joint 22 is strengthened. At the same time, the buffer part 44 can adapt to deformation when the joint 22 of the lining block opens and closes, thereby effectively preventing the sealing layer 4 from being damaged due to excessive stress at the joint 22, and preventing the sealing layer 4 from cracking and leaking under the high pressure and temperature change cycle of high pressure gas.

[0080] In this embodiment, the buffer section 44 includes two buffer strips disposed opposite to each other on the outer steel plate 41 and the inner steel plate 42. The buffer strips are smoothly connected by concave, convex, and concave arcs, with the concave arcs smoothly connecting to the remaining portions of the outer steel plate 41 or the inner steel plate 42. The ratio of the distance between the vertices of the two buffer strips to the width of the buffer strips is 0.3 to 1. Because the two buffer strips have higher strength and a larger capacity, in this embodiment, the gas sensor 7 is arranged between the two buffer strips, which can better protect the sensor during the operation of the gas storage tank and ensure stable sensor operation.

[0081] Specifically, such as Figure 1 The gas storage facility may also include:

[0082] A flexible adaptive layer 3 is disposed between the sealing layer 4 and the lining layer 2. The flexible adaptive layer 3 is made of a flexible material with a certain degree of compressibility, giving it characteristics such as low residual strain after repeated loading, good recoverability, and low creep. For example, the material of the flexible adaptive layer 3 can be polyurethane cork board, sponge rubber, etc. In this embodiment, the thickness of the flexible adaptive layer 3 is 5–50 mm, the compressive modulus is 0.5–5 MPa, and the Poisson's ratio is less than 0.4.

[0083] A flexible adaptive layer 3 is set between the sealing layer 4 and the lining layer 2. On the one hand, it can balance the internal air pressure borne by the surrounding rock of the cavern, the sealing layer 4, the lining layer 2 and other structures. On the other hand, it is beneficial to provide a continuous support structure for the sealing layer 4.

[0084] Specifically, such as Figure 1 The gas storage facility may also include:

[0085] A sprayed protective layer is installed on the inner side of the underground cavern wall to stabilize the surrounding rock. Correspondingly, a lining layer 2 is installed on the inner side of the sprayed protective layer. In this embodiment, the sprayed protective layer is arranged close to the inner wall of the underground cavern, and the structure of the sprayed protective layer adopts concrete spraying or sprayed concrete with steel mesh, and the thickness of the concrete is 10-20cm.

[0086] Specifically, such as Figures 1 to 2 The gas storage facility may also include:

[0087] Waterstop 6 is placed on the side of each joint 22 near the sprayed layer to reduce or prevent groundwater from seeping into the joint 22.

[0088] In this embodiment, a continuous waterstop 6 is arranged at each joint 22. The waterstop 6 in this embodiment is a copper waterstop 6.

[0089] Another embodiment of the present invention provides a method for arranging an underground gas storage facility, the method comprising:

[0090] S1. Determine the maximum pressure that the sealing layer 4 can withstand based on the structural and material parameters of the sealing layer 4;

[0091] S2. Calculate the difference between the design total pressure and the maximum pressure of the gas storage facility to obtain the first pressure;

[0092] S3. Based on the parameters of the underground cavern and the lining layer 2, determine the number and length of the first connecting rod 51 and / or the second connecting rod 52 required for the lining layer 2 under the combined action of the first pressure and the surrounding rock of the cavern.

[0093] In this embodiment, S1 can specifically be:

[0094] Based on the structural and material parameters of sealing layer 4, an analytical model of sealing layer 4 is constructed to obtain the maximum pressure that sealing layer 4 can withstand.

[0095] First, in this embodiment, based on the structure of the sealing layer 4 consisting of two steel plates and ribs 43, the thickness t of the sealing layer 4 is simplified by equivalent means. That is:

[0096]

[0097] Where m is the number of ribs 43, g is the thickness of ribs 43, t1 is the thickness of the inner steel plate 42, t2 is the distance between the inner steel plate 42 and the outer steel plate 41, t3 is the thickness of the outer steel plate 41, r2 is the outer diameter of the inner steel plate 42, and r3 is the inner diameter of the outer steel plate 41. All of the above parameters are structural parameters of the sealing layer 4.

[0098] Then, in this embodiment, finite element analysis software such as ANSYS, ABAQUS, and Midas are used to establish a two-dimensional simplified analysis model of the sealing layer 4 based on the thickness t of the sealing layer 4 and the annular structure.

[0099] Finally, based on the simplified two-dimensional analysis model of the sealing layer 4 described above, and combined with material parameters such as the allowable stress of the lining layer 2, this embodiment obtains the maximum pressure P1 that the sealing layer 4 can withstand.

[0100] Specifically, S2 may also include:

[0101] Calculate the ratio of the maximum pressure P1 to the total pressure P to obtain the air pressure ratio of the sealing layer 4;

[0102] According to the air pressure ratio design requirements, the structural parameters of the sealing layer 4 are adjusted so that the adjusted air pressure ratio matches the air pressure ratio design requirements.

[0103] In practice, if the pressure ratio obtained from S1 is not ideal, structural parameters such as the thickness of the outer steel plate 41, the thickness of the inner steel plate 42, and the number of ribs 43 of the sealing layer 4 can be adjusted, and the thickness t of the two-dimensional simplified analysis model of the sealing layer 4 can be modified to recalculate the maximum pressure P1 until the pressure ratio design requirements are met.

[0104] Specifically, S3 may also include:

[0105] Based on the structural and material parameters of the sealing layer 4, determine the radial deformation of the sealing layer 4 under maximum pressure;

[0106] Based on the parameters of the flexible adaptive layer 3, the compressibility deformation of the flexible adaptive layer 3 under the first pressure is determined;

[0107] The thickness Δ of the flexible adaptive layer 3 is obtained by calculating the sum of the radial deformation and the compressive deformation.

[0108] The parameters of the flexible adaptive layer 3 include structural parameters such as its thickness and radius, and material parameters such as its compressive modulus and Poisson's ratio.

[0109] In this embodiment, the determination of the compressibility deformation of the flexible adaptive layer 3 under the first pressure can specifically be as follows:

[0110] Using finite element analysis software such as ANSYS, ABAQUS, and Midas, a simplified two-dimensional analysis model of the flexible adaptive layer 3 was constructed to obtain the compressibility deformation of the flexible adaptive layer 3 under the first pressure.

[0111] Specifically, S3 can be:

[0112] Based on the parameters of the underground cavern and lining layer 2, a two-dimensional simplified analysis model of the cavern and lining layer is constructed using finite element analysis software such as ANSYS, ABAQUS, and Midas. The annular stress and annular deformation of lining layer 2 under the combined action of the first pressure and the surrounding rock of the cavern are obtained. Then, according to the "Code for Design of Concrete Structures" GB50010, and in combination with the material properties of the first connecting rod 51 and the second connecting rod 52, the number and length of the first connecting rod 51 and / or the second connecting rod 52 required for lining layer 2 are determined.

[0113] Among them, the parameters of the underground cavern include the strength of the surrounding rock, and the parameters of the lining layer 2 include structural parameters such as its thickness and radius, and material parameters such as its compression modulus and Poisson's ratio.

[0114] This embodiment provides an example as follows:

[0115] When the inner diameter of the lining layer 2 is 10m, the thickness is 50cm, the total pressure P is 10MPa, the maximum pressure P1 borne by the sealing layer 4 is 3MPa, and the structures of the first connecting rod 51 and the second connecting rod 52 are the same, the number of concrete lining blocks 21 is 4, the total number of the first connecting rod 51 and the second connecting rod 52 arranged at each joint 22 is 3, the length of the first connecting rod 51 and the second connecting rod 52 is 50cm, and the thickness Δ of the flexible adaptive layer 3 is 2cm.

[0116] The layout method of the present invention has a wide range of applications and can be applied to cavern surrounding rocks of different strengths, such as soft rock and hard rock. At the same time, the layout method of the present invention has high flexibility and can flexibly control the stress on the cavern surrounding rock, lining layer and sealing layer, ensuring the safety of the overall structure of the underground gas storage facility and the optimal layout, and reducing resource waste.

[0117] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. An underground gas storage facility, characterized in that, The gas storage facility includes: Underground caverns; A lining layer is provided on the inner side of the cavern wall of the underground cavern, and the lining layer is composed of multiple concrete lining blocks. A sealing layer is provided on the inner side of the lining layer, and both the sealing layer and the lining layer are annular; A connecting component, disposed on multiple concrete lining blocks, is used to movably connect two adjacent concrete lining blocks; Two adjacent concrete lining blocks have opposing first joint surfaces and second joint surfaces. The first joint surface is provided with a plurality of first insertion holes, and the second joint surface is provided with a plurality of second insertion holes. The connection component includes: Multiple first connecting rods, one end of which is fixed to the second joint surface, and the other end is respectively inserted into multiple first insertion holes; Multiple second connecting rods, one end of which is fixed to the first joint surface, and the other end is respectively inserted into multiple second insertion holes; Multiple guide tubes are inserted into multiple first insertion holes and multiple second insertion holes; multiple first connecting rods and multiple second connecting rods are respectively inserted into multiple guide tubes; Multiple telescopic components are respectively inserted into multiple guide tubes. One end of each telescopic component is fixed to the bottom of multiple first insertion holes and multiple second insertion holes, and the other end is respectively connected to multiple first connecting rods and multiple second connecting rods.

2. The gas storage facility according to claim 1, characterized in that, The ratio of the number of concrete lining blocks to the inner diameter of the lining layer is less than or equal to 1.

6.

3. The gas storage facility according to claim 1, characterized in that, The sealing layer is a double-layer hollow multi-ribbed plate structure. The sealing layer has multiple buffer portions protruding to both sides, and the multiple buffer portions correspond to multiple joint positions in the lining layer.

4. The gas storage facility according to claim 1, characterized in that, The gas storage facility also includes: A flexible adaptive layer is disposed between the sealing layer and the lining layer.

5. A method for arranging an underground gas storage facility, the method being used to arrange an underground gas storage facility as described in any one of claims 1 to 4, characterized in that, The method includes: S1. Determine the maximum pressure that the sealing layer can withstand based on the structural and material parameters of the sealing layer; S2. Calculate the difference between the design total pressure of the gas storage tank and the maximum pressure to obtain the first pressure; S3. Based on the parameters of the underground cavern and the lining layer, determine the number and length of the first connecting rod and / or the second connecting rod required by the lining layer under the combined action of the first pressure and the surrounding rock of the cavern.

6. The method according to claim 5, characterized in that, Before S2, the following also applies: Calculate the ratio of the maximum pressure to the total pressure to obtain the air pressure ratio of the sealing layer; According to the air pressure ratio design requirements, the structural parameters of the sealing layer are adjusted so that the adjusted air pressure ratio matches the air pressure ratio design requirements.

7. The method according to claim 6, characterized in that, Before S3, the following also applies: Based on the structural and material parameters of the sealing layer, determine the radial deformation of the sealing layer under the maximum pressure. Based on the parameters of the flexible adaptive layer, determine the compressibility deformation of the flexible adaptive layer under the first pressure. The thickness of the flexible adaptive layer is obtained by calculating the sum of the radial deformation and the compressive deformation.

Images