Deformation joint structure of sealing layer of gas storage cavern, sealing layer and gas storage cavern

Abstract

The invention relates to the technical field of compressed air energy storage caverns, in particular to a deformation joint structure of a sealing layer of an air storage cavern, the sealing layer and the air storage cavern. The deformation joint structure comprises a deformation corrugated plate, and the deformation corrugated plate is connected between two adjacent sections of linings in the annular direction of the cavern; corrugations on the deformed corrugated plate extend along the annular direction of the cavern; a deformation space is formed in the deformation corrugated plate, and a deformation filling piece is arranged in the deformation space. The deformation corrugated plate has elasticity, can resist a part of stress and also has the performance of restoring the original shape after force unloading, the deformation filling piece is filled in the deformation corrugated plate so that the compression resistance can be improved, the deformation filling piece has enough rigidity and elasticity so as to resist external pressure, and the compression deformation quantity of the deformation corrugated plate can be limited to a certain degree through the deformation filling piece. And structural instability caused by overlarge compression deformation quantity of the deformed corrugated plate is avoided, so that the external pressure resisting effect of the deformed joint can be improved.

Description

Technical Field

[0001] This invention relates to the field of compressed air energy storage cavern technology, and particularly to a deformable joint structure for the sealing layer of an air storage cavern, the sealing layer, and the air storage cavern. Background Technology

[0002] Traditional thin steel lining structures, with their readily available materials and mature construction techniques, were once the preferred solution for sealing layers in artificial gas storage caverns, effectively controlling material procurement and installation costs in the early stages of projects. However, as gas storage caverns have evolved towards higher pressure and larger capacity, their mechanical performance shortcomings have gradually become apparent: on the one hand, thin steel linings are prone to local instability and buckling deformation when subjected to surrounding rock pressure and internal gas pressure differences, making it difficult to maintain long-term airtightness; on the other hand, the elastic modulus and Poisson's ratio characteristics of steel result in significant stress concentration during deformation, requiring frequent maintenance and replacement, thus increasing the total life-cycle cost. In contrast, corrugated steel structures, by introducing a sinusoidal cross-section design, transform planar forces into a spatial mechanical system, increasing the moment of inertia and section modulus per unit area by 30% to 50%, effectively enhancing the structure's buckling resistance. However, for caverns using corrugated steel structures as sealing layers, the corrugations of the corrugated steel typically extend along the axial direction of the cavern. When the cavern is subjected to internal pressure, the corrugated steel is difficult to adapt to and compensate for the deformation of the sealing layer in the circumferential direction. Therefore, further improvements to the sealing layer structure are still needed to adapt to the circumferential deformation of the cavern. Summary of the Invention

[0003] The purpose of this invention is to overcome the technical problem that existing gas storage cavern sealing layer structures are difficult to adapt to structural deformation caused by changes in cavern internal pressure in the circumferential direction, and to provide a deformation joint structure for the sealing layer of a gas storage cavern, a sealing layer, and a gas storage cavern.

[0004] In a first aspect, the present invention provides a deformable joint structure for a gas storage cavern sealing layer, comprising a deformable corrugated plate connected between two adjacent inner lining sections in the circumferential direction of the cavern, wherein the corrugations on the deformable corrugated plate extend along the circumferential direction of the cavern; a deformable space is formed on the deformable corrugated plate, and a deformable filler is provided in the deformable space.

[0005] To enable the cavern lining (i.e., the sealing layer) to adapt to structural deformation caused by internal or external pressure in the circumferential direction of the cavern, this invention divides the cavern lining into multiple segments along the circumferential direction of the cavern, and sets deformation joints between every two segments to accommodate circumferential deformation. Specifically, deformable corrugated plates with corrugated extension directions along the circumferential direction of the cavern can be set, and deformation spaces are formed at the crests and troughs of the deformable corrugated plates. When the deformable corrugated plates are subjected to opposing pressures from the inner linings on both sides, the deformable corrugated plates can be compressed, narrowing the deformation spaces. Similarly, when the deformable corrugated plates are subjected to opposing tensile forces from the inner linings on both sides... At the same time, the stretchable and compressible corrugated plate widens the deformation space. The corrugated plate itself has a certain elasticity, which can resist some of the force. After the force is released, it also has the ability to return to its original shape. Filling the deformation space corresponding to the crests and troughs of the corrugated plate with deformable fillers can improve the compressive strength of the corrugated plate. The deformable fillers have sufficient rigidity and elasticity to resist external pressure. In other words, the compressive deformation of the corrugated plate can be limited to a certain extent by the deformable fillers, so as to avoid excessive compressive deformation of the corrugated plate causing structural instability. This can also improve the effect of the deformable joint against external pressure.

[0006] Preferably, the deformation space includes a plurality of crest spaces and a plurality of trough spaces, the crest spaces and the trough spaces being staggered in the extension direction of the corrugations; the deformation filler includes a pressure-resistant layer and an elastic filler layer, the elastic filler layer in the crest space being disposed on the side of the pressure-resistant layer away from the inner cavity of the cavern; the elastic filler layer in the trough space being disposed on both the side of the pressure-resistant layer away from the inner cavity of the cavern and the side facing the inner cavity of the cavern.

[0007] The deformable filler has a multi-layer structure. Specifically, the deformable filler in the trough space of the deformable corrugated plate includes a compression-resistant layer in the middle and elastic filler layers on both sides of the compression-resistant layer. The deformable filler in the crest space of the deformable corrugated plate includes a compression-resistant layer close to the interior of the cavity and an elastic filler layer away from the interior of the cavity. The compression-resistant layer is a rigid component that can resist external pressure after the deformation space is compressed and narrowed, while the elastic filler layer can adapt to the deformation of the corrugated plate and provide a certain deformation margin while resisting tensile and compressive forces.

[0008] Preferably, the pressure-resistant layer comprises a plurality of pressure-resistant blocks stacked radially along the cavity.

[0009] Preferably, the pressure-resistant block is fixedly connected to the deformable corrugated plate on one side of the deformation space, and a reserved deformation joint is formed between the pressure-resistant block and the deformable corrugated plate on the other side of the deformation space.

[0010] Multiple compression blocks are stacked and connected to a corrugated plate on one side, leaving a pre-reserved deformation joint on the other side. When the corrugated plate is under tension, the pre-reserved deformation joint can open and widen; when the corrugated plate is under compression, the pre-reserved deformation joint can be compressed and narrowed, allowing the corrugated plate a certain amount of compression deformation. When the compression block comes into contact with the corrugated plate on the other side, the pre-reserved deformation joint disappears. The compression block can resist external pressure and prevent the corrugated plate from continuing to undergo compression deformation, thus avoiding the corrugated plate from continuing to deform and causing plastic deformation or even structural instability.

[0011] Preferably, a plurality of the reserved deformation joints are staggered in the radial direction of the cavity.

[0012] In a multi-layered compression-resistant block structure, each compression-resistant block has a pre-reserved expansion joint on one side. Specifically, for example, if the first compression-resistant block is fixedly connected to the corrugated plate on its right side in the radial direction from the outside to the inside of the cavern, the pre-reserved expansion joint is located on the left side of the compression-resistant block, that is, between the compression-resistant block and the corrugated plate on its left side; if the second compression-resistant block is fixedly connected to the corrugated plate on its left side in the radial direction from the outside to the inside of the cavern, the pre-reserved expansion joint is located on the right side of the compression-resistant block, that is, between the compression-resistant block and the corrugated plate on its right side; if the third compression-resistant block is fixedly connected to the corrugated plate on its right side in the radial direction from the outside to the inside of the cavern, the pre-reserved expansion joint is located on the left side of the compression-resistant block, that is, between the compression-resistant block and the corrugated plate on its left side.

[0013] Preferably, the compression-resistant layer includes a plurality of springs, the two ends of which are fixedly connected to the deformable corrugated plates on both sides of the deformation space.

[0014] Springs can be used as an alternative to anti-compression blocks. That is, springs can be placed in the deformation space instead of anti-compression blocks to achieve a similar effect. Specifically, when the deformable corrugated plate is compressed, the spring can be compressed and deformed in the initial stage. When the spring is compressed to its limit, the spring can resist the external pressure and prevent the deformable corrugated plate from deforming further. When the external pressure is released, the deformable corrugated plate can return to its original shape under its own elasticity and the rebound of the spring.

[0015] Preferably, the material of the elastic filling layer includes filled rubber or polymer material; the deformable corrugated plate includes several plate segments, which are joined together along the extension direction of the corrugations.

[0016] Specifically, the elastic filler layer can be made of EPDM rubber or other polymer materials that possess both strength and some deformability. Its main function is to resist deformation under internal pressure. As the corrugated sheet is compressed and deformed, the elastic filler layer coordinates the deformation and provides support, preventing the corrugated sheet from being crushed or damaged. Multiple sections can be fixedly connected by welding to form an integral corrugated sheet structure. After the corrugated sheet is welded, the elastic filler layer is filled into the grooves of the corrugated sheet.

[0017] Preferably, the two outer end faces of the deformable corrugated plate are provided with elastic deformation elements.

[0018] Here, the elastic deformation component can also be the same material as the elastic filling layer, such as EPDM rubber or polymer. If the two sides of the joint structure are ordinary flat steel liners, then there is no need to set up an elastic deformation component; if the two sides of the joint structure are corrugated steel, then the elastic deformation component can be filled in the groove on the corrugated steel and bonded to the deformation joint.

[0019] In a second aspect, the present invention provides a sealing layer for a gas storage cavity, comprising a plurality of corrugated steel bars and a deformable joint structure for the sealing layer of the gas storage cavity as described above; the plurality of corrugated steel bars are arranged circumferentially along the cavity, and the deformable joint structure is connected between adjacent corrugated steel bars; the corrugations of the corrugated steel bars extend axially along the cavity.

[0020] In a third aspect, the present invention provides a gas storage cavern, comprising a sealing layer of the gas storage cavern as described above or a deformable joint structure of the sealing layer of the gas storage cavern as described above, and a concrete lining layer; the sealing layer and the concrete lining layer are arranged sequentially from the inside to the outside along the radial direction of the cavern, and the deformable joint structure and the concrete lining layer are arranged sequentially from the inside to the outside along the radial direction of the cavern.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a deformable joint structure for a gas storage cavern sealing layer, a sealing layer, and a gas storage cavern. The cavern lining is divided into multiple segments along the circumferential direction of the cavern, and a deformable joint is provided between every two lining segments to accommodate circumferential deformation. Specifically, a deformable corrugated plate with a corrugated extension direction along the circumferential direction of the cavern can be provided. Deformation spaces are formed at the crests and troughs of the deformable corrugated plate. When the deformable corrugated plate is subjected to opposing pressures from the linings on both sides, it can be compressed, narrowing the deformation space. Similarly, when the deformable corrugated plate is subjected to opposing tensile forces from the linings on both sides, it can be stretched... The expansion of the deformation space by stretching and compressing corrugated plates allows the corrugated plates themselves to have a certain degree of elasticity, which can resist some of the force. After the force is released, they also have the ability to return to their original shape. Filling the deformation space corresponding to the crests and troughs of the corrugated plates with deformable fillers can improve the compressive strength of the corrugated plates. The deformable fillers have sufficient rigidity and elasticity to resist external pressure. In other words, the compressive deformation of the corrugated plates can be limited by the deformable fillers to a certain extent, so as to avoid excessive compressive deformation of the corrugated plates causing structural instability. This can also improve the effect of deformable joints against external pressure.

[0022] 2. The deformable joint structure of the gas storage cavern sealing layer proposed in this invention is an innovative structural connection solution. When the cavern structure is subjected to internal pressure loads, this joint structure can endow the corrugated steel structure with good deformation coordination capabilities. Through reasonable structural design, it effectively releases internal stress, significantly reduces the tensile stress level of the corrugated steel caused by internal pressure, and ensures the safety and reliability of the structure under high internal pressure conditions. The high-performance deformable filler material filled in the deformable corrugated plate has unique mechanical properties. When the structure is subjected to internal pressure, it can play an effective restraining role, resisting the compressive deformation of the two sides of the structure caused by internal pressure, and maintaining the integrity and stability of the structure. During the construction and maintenance phases, the pressure-resistant steel blocks set inside the joint play a key role, acting as a force transmission medium to achieve effective transmission of internal forces in the corrugated steel structure, greatly improving the ability of the entire corrugated steel structure to resist external pressure loads and deformation, ensuring the safety of the construction process and the durability of the structure throughout its entire life cycle. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first structural embodiment of the deformable joint structure of the present invention.

[0024] Figure 2 for Figure 1 A cross-sectional view of a corrugated plate with deformation.

[0025] Figure 3 This is a schematic diagram of the second structure of the deformable joint structure of the present invention.

[0026] Figure 4 for Figure 3 A cross-sectional view of a corrugated plate with deformation.

[0027] Figure 5 This is a schematic diagram of the third structural embodiment of the deformable joint structure of the present invention.

[0028] Figure 6 This is a longitudinal sectional view of the gas storage chamber structure of the present invention.

[0029] Figure 7 This is a top sectional view of the deformable joint structure of the present invention.

[0030] Figure 8 This is a circumferential cross-sectional view of the gas storage chamber structure of the present invention.

[0031] Marked in the image: 1. Deformable joint structure; 2. Deformable corrugated plate; 21. Corrugated crest space; 22. Corrugated trough space; 23. Plate segment; 3. Corrugated steel; 4. Deformable filler; 41. Compression block; 42. Elastic filler layer; 43. Reserved deformation joint; 5. Elastic deformation component; 6. Concrete lining layer; 7. Spring. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0033] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0034] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0035] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0036] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0037] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0038] Example 1 This embodiment provides a deformable joint structure for the sealing layer of a gas storage cavern.

[0039] like Figures 1 to 8 As shown, the deformable joint structure of the gas storage cavern sealing layer in this embodiment includes a deformable corrugated plate 2. The deformable corrugated plate 2 is connected between two adjacent sections of the inner lining in the circumferential direction of the cavern. The corrugations on the deformable corrugated plate 2 extend along the circumferential direction of the cavern. A deformable space is formed on the deformable corrugated plate 2, and a deformable filler 4 is provided in the deformable space.

[0040] To enable the cavern lining (i.e., the sealing layer) to adapt to structural deformation caused by internal or external pressure in the circumferential direction of the cavern, this invention divides the cavern lining into multiple segments along the circumferential direction of the cavern, and sets deformation joints between every two segments to accommodate circumferential deformation. Specifically, a deformable corrugated plate 2 with a corrugated extension direction along the circumferential direction of the cavern can be provided. Deformation spaces are formed at the crests and troughs of the deformable corrugated plate 2. When the deformable corrugated plate 2 is subjected to opposing pressures from the inner linings on both sides, it can be compressed to narrow the deformation space. Similarly, when the deformable corrugated plate 2 is subjected to opposing tensile forces from the inner linings on both sides, it can compress the deformation space. The stretchable and compressible corrugated plate 2 widens the deformation space. The corrugated plate 2 itself has a certain elasticity, which can resist some of the force. It also has the ability to return to its original shape after the force is released. Filling the deformation space corresponding to the crest and trough of the corrugated plate with deformable filler 4 can improve the compressive strength of the corrugated plate 2. The deformable filler 4 has sufficient rigidity and elasticity to resist external pressure. That is, the compressive deformation of the corrugated plate 2 can be limited by the deformable filler 4 to avoid excessive compressive deformation of the corrugated plate 2 causing structural instability. In addition, it can also improve the effect of the deformable joint against external pressure.

[0041] In this embodiment, the deformation space includes multiple crest spaces 21 and multiple trough spaces 22, which are staggered in the direction of corrugation extension; the deformation filler 4 includes a pressure-resistant layer and an elastic filler layer 42, the elastic filler layer 42 in the crest space 21 is disposed on the side of the pressure-resistant layer away from the inner cavity of the cavern; the elastic filler layer 42 in the trough space 22 is disposed on the side of the pressure-resistant layer away from the inner cavity of the cavern and on the side of the pressure-resistant layer facing the inner cavity of the cavern.

[0042] The deformable filler 4 has a multi-layer structure. Specifically, the deformable filler 4 provided in the trough space 22 on the deformable corrugated plate 2 includes a compression-resistant layer in the middle and elastic filler layers 42 on both sides of the compression-resistant layer. The deformable filler 4 provided in the crest space 21 on the deformable corrugated plate 2 includes a compression-resistant layer close to the interior of the cavity and an elastic filler layer 42 away from the interior of the cavity. The compression-resistant layer is a rigid component that can resist external pressure after the deformation space is compressed and narrowed, while the elastic filler layer 42 can adapt to the deformation of the corrugated plate 2 and provide a certain deformation margin while resisting tensile and compressive forces.

[0043] Alternatively, the compressive layer may include a plurality of compressive blocks 41 stacked radially along the cavity.

[0044] Optionally, the compression block 41 is fixedly connected to the corrugated plate 2 on one side of the deformation space, and a reserved deformation joint 43 is formed between the compression block 41 and the corrugated plate 2 on the other side of the deformation space; the compression block 41 can be made of hard metal materials such as steel or alloy.

[0045] Multiple compression blocks 41 are stacked and connected to a corrugated plate on one side, leaving a pre-reserved deformation joint 43 on the other side. When the deformable corrugated plate 2 is under tension, the pre-reserved deformation joint 43 can open and widen; when the deformable corrugated plate 2 is under compression, the pre-reserved deformation joint 43 can be compressed and narrowed, leaving a certain amount of compression deformation for the deformable corrugated plate 2. When the compression block 41 contacts the deformable corrugated plate 2 on the other side, the pre-reserved deformation joint 43 disappears. The compression block 41 can resist external pressure and prevent the deformable corrugated plate 2 from continuing to undergo compression deformation, thus avoiding plastic deformation or even structural instability of the deformable corrugated plate 2.

[0046] Furthermore, multiple pre-reserved expansion joints 43 are staggered in the radial direction of the cavern.

[0047] In the multiple stacked pressure-resistant blocks 41, a reserved deformation joint 43 is formed on one side of each pressure-resistant block 41. Specifically, for example, if the first pressure-resistant block 41 is fixedly connected to the deformable corrugated plate 2 on its right side in the radial direction from the outside to the inside of the cavern, then the reserved deformation joint 43 is reserved on the left side of the pressure-resistant block 41, that is, the reserved deformation joint 43 is formed between the pressure-resistant block 41 and the deformable corrugated plate 2 on its left side; if the second pressure-resistant block 41 is fixedly connected to the deformable corrugated plate 2 on its left side in the radial direction from the outside to the inside of the cavern, then the reserved deformation joint 43 is reserved on the right side of the pressure-resistant block 41, that is, the reserved deformation joint 43 is formed between the pressure-resistant block 41 and the deformable corrugated plate 2 on its right side; if the third pressure-resistant block 41 is fixedly connected to the deformable corrugated plate 2 on its right side in the radial direction from the outside to the inside of the cavern, then the reserved deformation joint 43 is reserved on the left side of the pressure-resistant block 41, that is, the reserved deformation joint 43 is formed between the pressure-resistant block 41 and the deformable corrugated plate 2 on its left side.

[0048] Here, the staggered arrangement of the pre-reserved deformation joints 43 also means that multiple pressure-resistant blocks 41 are staggered along the radial direction of the cavity. When the deformable corrugated plate 2 is under pressure, the staggered multiple pressure-resistant blocks 41 will shift, thus adapting to the deformation of the deformable corrugated plate 2. Specifically, the multiple pressure-resistant blocks 41 arranged in a deformation space are spaced apart from each other. That is to say, a gap can be left between two adjacent pressure-resistant blocks 41, thus avoiding mutual friction and jamming when the multiple pressure-resistant blocks 41 shift when the deformable corrugated plate 2 is under pressure.

[0049] Alternatively, the compression-resistant layer includes multiple springs 7, with both ends of the springs 7 fixedly connected to the deformable corrugated plates 2 on both sides of the deformation space.

[0050] Spring 7 can be used as an alternative to anti-compression block 41. That is, spring 7 can be placed in the deformation space instead of anti-compression block 41 to achieve a similar effect. Specifically, when the deformable corrugated plate 2 is compressed, spring 7 can be compressed and deformed in the initial stage. When spring 7 is compressed to its limit, spring 7 can resist external pressure and prevent the deformable corrugated plate 2 from deforming further. When the external pressure is released, the deformable corrugated plate 2 can return to its original shape under its own elasticity and the rebound action of spring 7.

[0051] In this embodiment, the material of the elastic filling layer 42 includes filled rubber or polymer material; the deformable corrugated plate 2 includes multiple plate segments 23, which are joined together along the extension direction of the corrugations.

[0052] Specifically, the elastic filler layer 42 can be made of EPDM rubber or other polymer materials that possess both strength and some deformability. Its main function is to resist deformation under internal pressure. As the deformable corrugated plate 2 is compressed and deformed, the elastic filler layer 42 coordinates the deformation and provides support to prevent it from being crushed or damaged. Multiple plate segments 23 can be fixedly connected by welding to form the overall structure of the deformable corrugated plate 2.

[0053] In this embodiment, elastic deformation elements 5 are provided on the two outer end faces of the deformable corrugated plate 2.

[0054] Here, the elastic deformation element 5 can also be made of the same material as the elastic filling layer 42, such as EPDM rubber or polymer; if the two sides of the joint structure are corrugated steel 3, the elastic deformation element 5 can be filled in the groove on the corrugated steel 3 and connected to the deformation joint.

[0055] In this embodiment, during installation of the deformable joint structure 1, the deformable corrugated plate 2 can be pre-bent in the factory. After the deformable corrugated plate 2 is bent, the anti-compression block 41 (or spring 7) can be welded. The anti-compression block 41 (or spring 7) mainly serves as an anti-compression structure. The anti-compression block 41 is welded to one side of the deformable corrugated plate 2, and both ends of the spring 7 are welded to the deformable corrugated plate 2. Before welding, an elastic filling layer 42 can be inserted into the deformable corrugated plate 2. After installation, a reserved deformation joint 43 is reserved on the other side of the anti-compression block 41. Each deformable joint... Inside the space, three pressure-resistant blocks 41 are staggered and welded (or the two ends of the spring 7 are welded). Specifically, within a deformable space, the left side of the first pressure-resistant block 41, arranged radially from the outside to the inside of the cavern, is welded to the left-side deformable corrugated plate 2; the right side of the second pressure-resistant block 41 is welded to the right-side deformable corrugated plate 2; and the left side of the third pressure-resistant block 41 is welded to the left-side deformable corrugated plate 2. The remaining surfaces are left untreated. Deformation joints 43 and staggered joints between the steel blocks are reserved. The remaining deformable parts are welded similarly. After the deformable joint structure 1 is assembled on-site, the deformable corrugated plate 2 is butt-welded to the corrugated steel 3 of the cavern sealing layer, forming a sealed space inside the cavern sealing layer to prevent gas leakage.

[0056] The deformed corrugated plate 2, the pressure-resistant block 41 and the elastic filling layer 42 of the deformable joint structure 1 can also be installed in the factory. The corrugated steel 3 can be transported to the construction site in sections, and then the deformable joint structure 1 and the corrugated steel 3 can be assembled and welded on the construction site, which reduces the difficulty of construction and improves the construction efficiency.

[0057] By using corrugated steel 3 as the inner lining structure, the relatively thin corrugated steel 3 resists its own deformation and external pressure deformation, thus reducing the amount of steel used in the sealing layer and lowering costs. This joint type mainly involves sealing and welding the corrugated steel 3 on both sides, which has deformation resistance. While ensuring no air leakage under internal pressure, it provides circumferential deformation, thereby reducing stress concentration in the corrugated steel 3. When under external pressure, the pre-reserved deformation joint 43 between the pressure-resistant block 41 (or spring 7) and the deformable corrugated plate 2 within the joint is compacted, forming an integral steel inner lining structure to resist external pressure. From a professional perspective, when selecting the thickness of the corrugated steel 3, it is necessary to conduct specific stress analysis, calculate external pressure loads, internal pressure loads, and structural self-weight, and apply relevant theories of materials mechanics and structural mechanics to determine a steel plate thickness that meets both deformation resistance requirements and economical cost. Regarding the sealing welding process, appropriate welding parameters and methods should be adopted, such as gas shielded welding, to ensure welding quality and avoid defects such as porosity and cracks, thereby guaranteeing sealing performance. For the design of the pressure-resistant block 41 (or spring 7), the strength and stiffness of its material, as well as its compatibility with the steel plate, must be considered. By reasonably setting the size of the reserved compressive deformation space, the structure can deform in an orderly manner under external pressure, gradually forming an overall load-bearing system and improving the structure's load-bearing capacity and stability.

[0058] Example 2 This embodiment provides a sealing layer for a gas storage cavity.

[0059] The sealing layer of the gas storage cavern in this embodiment includes multiple corrugated steel pieces 3 and a deformable joint structure as in embodiment 1 for the sealing layer of the gas storage cavern; the multiple corrugated steel pieces 3 are arranged circumferentially along the cavern, and the deformable joint structure 1 is connected between adjacent corrugated steel pieces 3; the corrugations of the corrugated steel pieces 3 extend axially along the cavern.

[0060] Example 3 This embodiment provides a gas storage cavern.

[0061] The gas storage cavern in this embodiment includes the sealing layer of the gas storage cavern in embodiment 2 or the deformable joint structure of the sealing layer of the gas storage cavern in embodiment 1, and the concrete lining layer 6; the sealing layer and the concrete lining layer 6 are arranged sequentially from the inside to the outside along the radial direction of the cavern, and the deformable joint structure 1 and the concrete lining layer 6 are arranged sequentially from the inside to the outside along the radial direction of the cavern.

[0062] In summary, this invention provides a deformable joint structure for a gas storage cavern sealing layer, a sealing layer, and a gas storage cavern. The cavern lining is divided into multiple segments along the circumferential direction of the cavern, and a deformable joint is provided between every two lining segments to accommodate circumferential deformation. Specifically, deformable corrugated plates with corrugated extension directions along the circumferential direction of the cavern can be provided. Deformation spaces are formed at the crests and troughs of the deformable corrugated plates. When the deformable corrugated plates are subjected to opposing pressures from the linings on both sides, the deformable corrugated plates can be compressed, narrowing the deformation spaces. Similarly, when the deformable corrugated plates are subjected to opposing tensile forces from the linings on both sides... The stretchable and compressible corrugated plate expands the deformation space. The corrugated plate itself has a certain degree of elasticity, which can resist some of the force. It also has the ability to return to its original shape after the force is released. Filling the deformation space corresponding to the crests and troughs of the corrugated plate with deformable fillers can improve the compressive strength of the corrugated plate. The deformable fillers have sufficient rigidity and elasticity to resist external pressure. In other words, the compressive deformation of the corrugated plate can be limited by the deformable fillers to a certain extent, so as to avoid excessive compressive deformation of the corrugated plate causing structural instability. This can also improve the effect of the deformable joint against external pressure.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A deformation joint structure for a seal layer of a gas storage cavern, characterized by, The application relates to a deformation joint structure (1) of a sealing layer of a gas storage cavern, which comprises a deformed corrugated plate (2) connected between two adjacent segments of a lining in the circumferential direction of a cavern, wherein the corrugations on the deformed corrugated plate (2) extend in the circumferential direction of the cavern; and a deformation space is formed on the deformed corrugated plate (2), and a deformation filler (4) is arranged in the deformation space.

2. The gassy cavern seal layer deformation joint structure according to claim 1, characterized by, The deformation space comprises a plurality of crest spaces (21) and a plurality of trough spaces (22), wherein the crest spaces (21) and the trough spaces (22) are arranged alternately in the extending direction of the corrugations; the deformation filler (4) comprises a compression-resistant layer and an elastic filler layer (42), the elastic filler layer (42) in the crest space (21) is arranged on the side of the compression-resistant layer away from the inner cavity of the cavern; and the elastic filler layer (42) in the trough space (22) is arranged on the side of the compression-resistant layer away from the inner cavity of the cavern and on the side of the compression-resistant layer facing the inner cavity of the cavern.

3. The gassy cavern seal layer deformation joint structure according to claim 2, characterized by, The compression-resistant layer comprises a plurality of compression-resistant blocks (41) arranged in the radial direction of the cavern.

4. The gassy cavern seal layer deformation joint structure according to claim 3, characterized by, The compression-resistant blocks (41) are fixedly connected with the deformed corrugated plate (2) on one side of the deformation space, and a reserved deformation joint (43) is formed between the compression-resistant blocks (41) and the deformed corrugated plate (2) on the other side of the deformation space.

5. The gassy cavern seal layer deformation joint structure according to claim 4, characterized by, A plurality of the reserved deformation joints (43) are arranged alternately in the radial direction of the cavern.

6. The gassy cavern seal layer deformation joint structure according to claim 2, characterized by, The compression-resistant layer comprises a plurality of springs (7), and the two ends of the spring (7) are fixedly connected with the deformed corrugated plate (2) on the two sides of the deformation space.

7. The gassy cavern seal layer deformation joint structure according to any one of claims 2 to 6, characterized by, The material of the elastic filler layer (42) comprises filling rubber or a high polymer material; and the deformed corrugated plate (2) comprises a plurality of plate segments (23) abutting in the extending direction of the corrugations.

8. The gassy cavern seal layer deformation joint structure according to any one of claims 2 to 6, characterized by, Elastic deformation members (5) are arranged on the two outer end faces of the deformed corrugated plate (2).

9. A sealant for a gas storage cavern, characterized in that The application relates to a deformation joint structure (1) of a sealing layer of a gas storage cavern, which comprises a deformed corrugated plate (2) connected between two adjacent segments of a lining in the circumferential direction of a cavern, wherein the corrugations on the deformed corrugated plate (2) extend in the circumferential direction of the cavern; and a deformation space is formed on the deformed corrugated plate (2), and a deformation filler (4) is arranged in the deformation space.

10. A gas storage cavern, characterized in that, The deformation space comprises a plurality of crest spaces (21) and a plurality of trough spaces (22), wherein the crest spaces (21) and the trough spaces (22) are arranged alternately in the extending direction of the corrugations; the deformation filler (4) comprises a compression-resistant layer and an elastic filler layer (42), the elastic filler layer (42) in the crest space (21) is arranged on the side of the compression-resistant layer away from the inner cavity of the cavern; and the elastic filler layer (42) in the trough space (22) is arranged on the side of the compression-resistant layer away from the inner cavity of the cavern and on the side of the compression-resistant layer facing the inner cavity of the cavern. The compression-resistant layer comprises a plurality of compression-resistant blocks (41) arranged in the radial direction of the cavern. The compression-resistant blocks (41) are fixedly connected with the deformed corrugated plate (2) on one side of the deformation space, and a reserved deformation joint (43) is formed between the compression-resistant blocks (41) and the deformed corrugated plate (2) on the other side of the deformation space. A plurality of the reserved deformation joints (43) are arranged alternately in the radial direction of the cavern. The compression-resistant layer comprises a plurality of springs (7), and the two ends of the spring (7) are fixedly connected with the deformed corrugated plate (2) on the two sides of the deformation space. The material of the elastic filler layer (42) comprises filling rubber or a high polymer material; and the deformed corrugated plate (2) comprises a plurality of plate segments (23) abutting in the extending direction of the corrugations. Elastic deformation members (5) are arranged on the two outer end faces of the deformed corrugated plate (2). The application relates to a deformation joint structure (1) of a sealing layer of a gas storage cavern, which comprises a deformed corrugated plate (2) connected between two adjacent segments of a lining in the circumferential direction of a cavern, wherein the corrugations on the deformed corrugated plate (2) extend in the circumferential direction of the cavern; and a deformation space is formed on the deformed corrugated plate (2), and a deformation filler (4) is arranged in the deformation space. The deformation space comprises a plurality of crest spaces (21) and a plurality of trough spaces (22), wherein the crest spaces (21) and the trough spaces (22) are arranged alternately in the extending direction of the corrugations; the deformation filler (4) comprises a compression-resistant layer and an elastic filler layer (42), the elastic filler layer (42) in the crest space (21) is arranged on the side of the compression-resistant layer away from the inner cavity of the cavern; and the elastic filler layer (42) in the trough space (22) is arranged on the side of the compression-resistant layer away from the inner cavity of the cavern and on the side of the compression-resistant layer facing the inner cavity of the cavern. The compression-resistant layer comprises a plurality of compression-resistant blocks (41) arranged in the radial direction of the cavern.

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