Assembly type sealing structure, sealing method and energy storage chamber

Abstract

The invention discloses an assembly type sealing structure, a sealing method and an energy storage chamber, and relates to the technical field of compressed air energy storage sealing. The assembly type sealing structure comprises a positioning piece, a sealing piece, a sealing layer, a plurality of fixing pieces and sealing filler. The positioning piece is located on one side of a to-be-sealed gap, and the sealing piece is located on the side, away from the positioning piece, of the to-be-sealed gap and covers the to-be-sealed gap; the sealing layer is arranged between the positioning piece and the sealing piece in a clamping manner, and the positioning piece and the sealing piece are fixed by the plurality of fixing pieces, so that the sealing layer is clamped by the positioning piece and the sealing piece; the gap between the positioning piece and the sealing piece is filled with the sealing filler, and the sealing filler is used for achieving sealing safety. Based on the technical scheme disclosed by the invention, the welding workload is greatly reduced, the sealing system redundancy can be provided, the construction efficiency can be improved, the construction quality can be guaranteed, and the energy storage performance of the energy storage chamber can be improved.

Description

Technical Field

[0001] This invention relates to the field of compressed air energy storage sealing technology, specifically to an assembled sealing structure, sealing method, and energy storage chamber. Background Technology

[0002] Compressed air energy storage (CAES) is a new type of large-scale power energy storage system. Compared with above-ground air tanks, underground caverns have larger storage capacity, lower cost, and higher safety. Moreover, artificial cavern-type underground storage does not depend on special geographical conditions and has broad application prospects.

[0003] Energy storage chambers differ from traditional underground engineering projects because they withstand significant internal pressure, thus requiring high-performance sealing layers. Currently, metal sealing layers and / or polymer sealing layers are commonly used for sealing.

[0004] However, both mainstream metal and polymer sealing layers have varying degrees of application bottlenecks in related technologies. On the one hand, under high internal pressure, the concrete of the energy storage chamber will inevitably crack under tension, and the sealing layer at the crack will be at risk of damage and leakage due to stress concentration. On the other hand, existing sealing materials are limited by process and material defects, and are prone to problems such as rubber damage due to concrete cracks, increased rubber tensile leakage rate, and gas seepage during application.

[0005] Furthermore, due to the size limitations of the chamber, it is difficult to manufacture the sealing layer as a whole structure. As a result, the construction of the chamber inevitably involves the on-site construction of the sealing layer integration process, such as metal welding and rubber vulcanization. In deep underground and confined spaces, equipment and personnel are limited, making construction extremely difficult and prone to human error and weak points in the joints. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an assembled sealing structure, sealing method and energy storage chamber, which solves the technical problems of difficult construction of the sealing layer of the energy storage chamber, difficulty in ensuring quality and easy leakage in the prior art.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an assembled sealing structure, comprising: Positioning element, located on one side of the gap to be sealed, is used to position the gap to be sealed; A sealing element is located on the side of the gap to be sealed away from the positioning element and covers the gap to be sealed. A sealing layer is clamped between the positioning element and the sealing element to achieve a seal on the contact surface. Multiple fasteners secure the positioning member and the sealing member, thereby clamping the sealing layer between the positioning member and the sealing member; and A sealing filler is used to fill the gap between the positioning element and the sealing element to achieve a seal.

[0008] In some embodiments, the seal is a sealing strip extending along the gap to be sealed, the shape or overall shape of the sealing strip on the side near the gap to be sealed being adapted to the shape of the adjacent surface of the object to be sealed.

[0009] In some embodiments, a protrusion is provided on the sealing strip at a position corresponding to the gap to be sealed. The protrusion protrudes toward the side away from the positioning member, so that a sealing cavity for filling the sealing filler is formed between the sealing strip and the positioning member.

[0010] In some embodiments, the sealing layer includes: At least one first sealing layer is clamped between the positioning member and the object to be sealed, for sealing the gap between the positioning member and the object to be sealed; and At least one second sealing layer is clamped between the sealing element and the object to be sealed, for sealing the gap between the sealing element and the object to be sealed.

[0011] In some embodiments, the sealing layer is a polymer sealing rubber, and its material is EPDM rubber.

[0012] In some embodiments, the shape or overall shape of the positioning member near the gap to be sealed is adapted to the shape of the adjacent surface of the object to be sealed, and a crack guide is fixedly provided on the side of the positioning member away from the sealing member, the position of the crack guide on the positioning member corresponding to the position of the gap to be sealed.

[0013] In some embodiments, the positioning element includes: The arched portion is positioned corresponding to the location of the gap to be sealed and protrudes towards the side away from the seal. Two extensions are respectively disposed on opposite sides of the arched portion along the width direction of the gap to be sealed, and are configured to abut against the sealing layer; and Multiple connecting parts are respectively disposed on the two extension parts and are used to connect the multiple fasteners.

[0014] In some embodiments, the sealing filler is an acrylate filler, which fills the gap between the positioning element and the sealing element when it solidifies.

[0015] Secondly, the present invention also provides an energy storage chamber, including a concrete lining and a plurality of plastic-coated sealing steel plates disposed on the inner side of the concrete lining, wherein at least one joint of the plurality of plastic-coated sealing steel plates is provided with the above-mentioned prefabricated sealing structure.

[0016] Thirdly, the present invention also provides a sealing method applied to the aforementioned energy storage chamber, comprising the following steps: S1. Set up the mold and fix the positioning parts to the inside of the mold; S2. Pour concrete, and after the concrete has cured, remove the formwork to form a concrete lining with the positioning component pre-embedded and fixed on the inner side. S3. Using the positioning component as the installation point, the prefabricated sealing structure is installed to seal the joint between the two plastic-coated sealing steel plates on the inner side of the concrete lining. S4. Sealing inspection.

[0017] Compared with existing technologies, the present invention provides a prefabricated sealing structure, sealing method, and energy storage chamber. By setting multiple plastic-coated sealing steel plates on the inner side of the concrete lining, and using positioning parts pre-embedded and fixed on the concrete lining, sealing parts, sealing layers, and sealing fillers are arranged at the positioning parts as installation points to form a combined sealing system to seal the joints of the plastic-coated sealing steel plates. This avoids the use of metal welding or rubber vulcanization and other construction processes, simplifies construction operations, significantly reduces on-site welding work, lowers construction accuracy requirements, and provides redundancy in the sealing system. This not only helps to improve construction efficiency and ensure construction quality, but also ensures the airtightness of the energy storage chamber, thereby improving the energy storage performance of the energy storage chamber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the energy storage chamber under construction in one embodiment of the present invention; Figure 2 This is a schematic diagram of the assembled sealing structure in one embodiment of the present invention; Figure 3 This is a schematic flowchart of a sealing method for sealing an energy storage chamber in one embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Surrounding rock; 2. Concrete lining; 3. Prefabricated sealing structure; 31. Embedded part; 311. Arched part; 312. Extension part; 313. Connecting part; 314. Crack guide; 32. Sealing strip; 321. Protrusion; 322. Extension part; 33. Sealing gasket; 331. First sealing layer; 332. Second sealing layer; 34. Fixing bolt; 35. Sealing filler; 4. Concrete pouring formwork; 5. End cap formwork; 6. Plastic-coated sealing steel plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] To address the aforementioned technical problems, this invention provides a prefabricated sealing structure, sealing method, and energy storage chamber. This avoids the use of metal welding or rubber vulcanization, facilitating construction operations, significantly reducing on-site welding workload, lowering construction precision requirements, and providing redundancy in the sealing system. This not only helps improve construction efficiency and ensures construction quality but also guarantees the airtightness of the energy storage chamber, thereby improving its energy storage performance.

[0022] Please see Figure 1-2 This invention provides an energy storage chamber, which includes surrounding rock 1 and concrete lining 2. The concrete lining 2 is cast and formed on the inner side of the surrounding rock 1, and multiple sealing steel plates are laid on the inner wall of the concrete lining 2. The multiple sealing steel plates can be evenly distributed in a circumferential direction on the inner wall of the concrete lining 2.

[0023] In this energy storage chamber, the surrounding rock 1 plays a major role in bearing the load; while multiple plastic-coated sealing steel plates 6 are spliced ​​and fixed in sequence along the circumference, which can seal the energy storage chamber.

[0024] In related technologies, the sealing steel plates can be fixed by welding. However, in this embodiment, the sealing steel plates are no longer welded. Instead, a sealing structure is set at the joint of each sealing steel plate. This sealing structure can not only connect the sealing steel plates, but also effectively seal the joint of each sealing steel plate, thereby reducing the amount of welding work and reducing the difficulty of construction.

[0025] In one embodiment, please refer to Figure 2 The aforementioned sealing steel plate can be a plastic-coated sealing steel plate 6. The plastic-coated sealing steel plate 6 can be a thin steel plate with a thickness of 5 to 8 mm, and the shape of each plastic-coated sealing steel plate 6 can be adapted to the shape of the inner wall of the concrete lining 2, so that each plastic-coated sealing steel plate 6 can fully fit with the inner wall of the concrete lining 2 to ensure sealing.

[0026] Understandably, in practical applications, the thickness and quantity of the plastic-coated sealing steel plate 6 can be set as needed, and no specific limitation is required. Furthermore, to improve the service life of the plastic-coated sealing steel plate 6, both the inner and outer sides of the plate can be coated with plastic for corrosion protection, or other forms of corrosion protection can be used; these are also not specifically limited.

[0027] Based on this, the above-mentioned sealing structure can be set in multiple places on the inner side of the energy storage chamber. The number of such structures can be determined according to the number of plastic-coated sealing steel plates 6 in the design of the energy storage chamber. Preferably, the sealing structure can be set at each joint of the plastic-coated sealing steel plate 6.

[0028] For example, in one embodiment, the number of plastic-coated sealing steel plates 6 on the energy storage chamber can be designed to be 6 pieces, so the sealing structure can be set in 6 places. The 6 sealing structures can be evenly distributed in a circumferential direction on the inner wall of the energy storage chamber, that is, one sealing structure can be set every 60°, so that the 6 sealing structures can seal the 6 seams formed by splicing the plastic-coated sealing steel plates 6 respectively.

[0029] The above methods can ensure the airtightness of the energy storage chamber and reduce the risk of leakage.

[0030] Please see Figure 2 The present invention also provides an assembled sealing structure that can be applied in the above-mentioned energy storage chamber to seal the joints of each plastic-coated sealing steel plate 6.

[0031] In this embodiment, the assembled sealing structure 3 is applied in the aforementioned energy storage chamber, and it can constitute the aforementioned sealing structure, thereby sealing the joints of the plastic-coated sealing steel plate 6. Therefore, for the assembled sealing structure 3, the plastic-coated sealing steel plate 6 can constitute the corresponding object to be sealed, and the joints of the plastic-coated sealing steel plate 6 can constitute the corresponding gaps to be sealed.

[0032] For the aforementioned energy storage chamber, when six plastic-coated sealing steel plates 6 are installed, the prefabricated sealing structure 3 can also be correspondingly installed in six locations. Since the six prefabricated sealing structures 3 can adopt the same structural form, for ease of understanding, this embodiment will take one of the prefabricated sealing structures 3 as an example to describe the specific structural form of the prefabricated sealing structure 3.

[0033] The prefabricated sealing structure 3 includes a positioning element, a sealing element, and multiple fixing elements. The positioning element can be fixedly installed on the concrete lining 2, the sealing element can be installed on the side of the plastic-coated sealing steel plate 6 away from the concrete lining 2, and the multiple fixing elements can fix the positioning element and the sealing element. The sealing element can completely cover the corresponding joint to effectively seal the joint of the corresponding plastic-coated sealing steel plate 6.

[0034] In one embodiment, please refer to Figure 2The positioning element can be an embedded part 31 cast and fixed on the concrete lining 2, located on the side of the concrete lining 2 close to the plastic-coated sealing steel plate 6. When the joint of the two plastic-coated sealing steel plates 6 is a strip joint extending along the surface of the plastic-coated sealing steel plate 6, the embedded part 31 can be a strip steel plate aligned with the joint and extending along the joint.

[0035] Meanwhile, to ensure the sealing effect of the joint, the shape of the embedded part 31 on the side away from the concrete lining 2 (i.e. the shape on the side near the joint) or its overall shape can also be adapted to the shape of the adjacent surface of the plastic-coated sealing steel plate 6.

[0036] In this way, the embedded part 31 is cast and fixed in the concrete lining 2, which not only facilitates construction but also ensures the stability of the embedded part 31. Furthermore, the shape of the embedded part 31 matches the shape of the plastic-coated sealing steel plate 6, which helps improve the sealing effect of the prefabricated sealing structure 3 on the corresponding joints.

[0037] In one embodiment, please refer to Figure 2 The aforementioned embedded part 31 is also fixedly provided with a plurality of connecting parts 313. The plurality of connecting parts 313 can be symmetrically arranged on opposite sides of the embedded part 31 along the corresponding joint width direction, and can extend toward the side away from the plastic-coated sealing steel plate 6 into the interior of the concrete lining 2. Bolt holes can be provided on the inner side of each connecting part 313.

[0038] In this way, each connecting part 313 can not only improve the stability of the connection between the embedded part 31 and the concrete lining 2, but also facilitate the connection of each fixing part.

[0039] In one embodiment, please refer to Figure 2 The embedded part 31 is also provided with an arched part 311, which can protrude toward the side away from the plastic-coated sealing steel plate 6 and form an arched structure on the embedded part 31. At the same time, the arched part 311 is preferably aligned with the corresponding joint and preferably extends in the same direction as the corresponding joint on the embedded part 31.

[0040] Based on this, the portions of the embedded part 31 located on both sides of the arched portion 311 can respectively form two extension portions 312. The two extension portions 312 can be symmetrically arranged on opposite sides of the arched portion 311 along the width direction of the corresponding joint. The shape of each extension portion 312 away from the concrete lining 2 or its overall shape is preferably adapted to the shape of the adjacent surface of the plastic-coated sealing steel plate 6.

[0041] Meanwhile, the aforementioned multiple connecting portions 313 can be respectively disposed on the two extension portions 312, and the connecting portions 313 on the two extension portions 312 are preferably symmetrically disposed.

[0042] In one embodiment, please refer to Figure 2 A crack guide 314 is also fixedly installed on the side of the embedded part 31 away from the plastic-coated sealing steel plate 6. The crack guide 314 can be a V-shaped pointed vertical thin plate, which is preferably vertically fixed on the arch 311 at the position of the joint and extends toward the interior of the concrete lining 2, with its tip located at the end away from the arch 311.

[0043] It is understandable that, with the help of the arched portion 311 and the extension portions 312 on both sides, the embedded part 31 can form a double-wing wave structure. In conjunction with the crack guide 314 set at the position of the arched portion 311, the embedded part 31 can constitute a weak link in the concrete lining 2 of the chamber.

[0044] Under the long-term cyclical operation of the chamber, since the embedded part 31 is a weak link in the concrete lining 2, the cracks in the chamber can be directionally cracked at the location of the embedded part 31, thereby achieving the purpose of directional cracking under the condition that cracking is unavoidable.

[0045] In this embodiment, the aforementioned sealing element is located on the side of the plastic-coated sealing steel plate 6 away from the aforementioned embedded part 31. It can be fixedly connected to the embedded part 31 through various fasteners, thereby covering and sealing the corresponding joint.

[0046] In one embodiment, please refer to Figure 2 The sealing element can be a sealing strip 32 extending along the corresponding joint. The sealing strip 32 can be a steel plate that covers the corresponding joint, and its shape or overall shape on the side near the joint can be adapted to the shape of the adjacent surface of the plastic-coated sealing steel plate 6. For example, when the adjacent surface of the plastic-coated sealing steel plate 6 is an arc surface, the shape or overall shape of the sealing strip 32 on the side near the joint can be set as an arc structure.

[0047] Based on this, the sealing strip 32 is also provided with multiple bolt holes, which can be aligned with the bolt holes on the embedded part 31 and cooperate with the above-mentioned multiple fasteners to fix the sealing part and the positioning part.

[0048] In one embodiment, please refer to Figure 2 The sealing strip 32 also has a protrusion 321 formed at the position directly opposite the seam. This protrusion 321 protrudes away from the embedded part 31 and can form an arched structure in the middle of the sealing strip 32. At this time, the portions of the sealing strip 32 located on opposite sides of the protrusion 321 can form extension portions 322, and the bolt holes on the sealing strip 32 can be respectively set on the extension portions 322 on both sides to match the bolt holes on the embedded part 31.

[0049] In the above manner, the arched structure formed by the protrusion 321 can serve as an elastic deformation reserve, giving it a certain deformation release capability, which helps to improve the reliability of sealing and connection.

[0050] Please see Figure 2 In this embodiment, the assembled sealing structure 3 also includes a sealing layer disposed between the sealing strip 32 and the embedded part 31. The sealing layer is clamped between the sealing strip 32 and the embedded part 31 and can be used to achieve surface contact sealing.

[0051] In one embodiment, the sealing layer can be a sealing gasket 33. The sealing gasket 33 can be made of any material that can provide an elastic sealing effect, but is preferably made of polymer sealing rubber, such as EPDM rubber or other similar rubbers. There is no specific limitation on this.

[0052] Based on this, the sealing gasket 33 can be placed between the sealing strip 32 and the plastic-coated sealing steel plate 6, or it can be placed between the plastic-coated sealing steel plate 6 and the embedded part 31.

[0053] If the sealing gasket 33 is positioned between the sealing strip 32 and the plastic-coated sealing steel plate 6, the sealing gasket 33 can be divided into two parts. These two parts can be positioned on opposite sides of the joint width and aligned with the two extensions 322 on the sealing strip 32. When multiple fasteners completely secure the sealing strip 32 to the embedded part 31, the extensions 322 and the plastic-coated sealing steel plate 6 can clamp the corresponding sealing gasket 33. The sealing gasket 33 abuts against the extensions 322 and the plastic-coated sealing steel plate 6, closing the gap between them and achieving a sealed contact surface.

[0054] If the sealing gasket 33 is placed between the plastic-coated sealing steel plate 6 and the embedded part 31, it can be set in the same way as the sealing gasket 33 between the sealing strip 32 and the plastic-coated sealing steel plate 6, which will not be described in detail here.

[0055] To ensure a proper seal, please refer to other embodiments. Figure 2 The aforementioned sealing gasket 33 can be provided in two layers, which may include a first sealing layer 331 and a second sealing layer 332.

[0056] The first sealing layer 331 can be clamped between the plastic-coated sealing steel plate 6 and the embedded part 31, and the second sealing layer 332 can be clamped between the sealing strip 32 and the plastic-coated sealing steel plate 6. The specific arrangement of the first sealing layer 331 and the second sealing layer 332 can be set with reference to the above-mentioned arrangement of the sealing gasket 33 between the sealing strip 32 and the plastic-coated sealing steel plate 6, which will not be repeated here.

[0057] In one embodiment, the aforementioned fastener can be a fixing bolt 34, and multiple fixing bolts 34 are provided. The multiple fixing bolts 34 can be divided into two symmetrical parts, and the two parts of fixing bolts 34 can be respectively provided on both sides of the joint width direction.

[0058] In the above manner, the fixing bolt 34 can pass through the bolt hole on the sealing strip 32, the sealing gasket 33, and the opening on the plastic-coated sealing steel plate 6, and be threadedly connected to the bolt hole on the embedded part 31 (i.e. the bolt hole on the connecting part 313 mentioned above), thereby fixing the sealing strip 32, the plastic-coated sealing steel plate 6, the sealing gasket 33, and the embedded part 31, and clamping the sealing gasket 33 to achieve a sealing of the contact surface.

[0059] In one embodiment, a sealing cavity can be formed between the arched portion 311 on the embedded part 31 and the protrusion 321 on the sealing strip 32. The sealing cavity is also filled with a sealing filler 35, which can be a flexible filler, such as a two-component acrylate filler.

[0060] In the above manner, when the sealing filler 35 is filled into the sealing cavity and other gaps between the sealing strip 32 and the embedded part 31, the sealing filler 35 can fully fill the gaps at the joint after solidification, thereby playing a sealing and insurance role and helping to achieve deformation coordination.

[0061] It should be noted that when multiple plastic-coated sealing steel plates 6 are spliced ​​and sealed on the inner wall of the energy storage chamber, the prefabricated sealing structure 3 can be set at each joint of the plastic-coated sealing steel plate 6 to seal each joint of the plastic-coated sealing steel plate 6 respectively. Each prefabricated sealing structure 3 can be set as described above, and will not be repeated here.

[0062] Please see Figure 3 This invention also provides a sealing method applicable to the aforementioned energy storage chamber to seal the joints of the plastic-coated sealing steel plate 6 on the inner wall of the energy storage chamber. The sealing method includes the following steps: S1. Set up the mold and fix the positioning parts to the inside of the mold; S2. Pour concrete, and after the concrete has cured, remove the formwork to form a concrete lining 2 with the above-mentioned positioning components pre-embedded and fixed on the inner side. S3. Using the above-mentioned positioning parts as installation points, install the above-mentioned prefabricated sealing structure 3 to seal the joint of the two plastic-coated sealing steel plates 6 on the inner side of the concrete lining 2. S4. Sealing inspection.

[0063] In one embodiment, please refer to Figure 1The above step S1 may include: installing the concrete pouring formwork 4, accurately measuring and positioning the position of the embedded part 31 (i.e. the positioning part, including the crack guide 314) on the concrete pouring formwork 4, and marking it.

[0064] Then, a release agent can be applied to the surface of the concrete pouring formwork 4, and the embedded part 31 can be firmly fixed to the concrete pouring formwork 4 with bolts so that it can present the desired state (i.e., the state of the embedded part 31 on the concrete lining 2 as described above). After completing step S1, concrete can be poured into the concrete pouring formwork 4. After the concrete has cured, the formwork can be removed to form the concrete lining 2. The aforementioned embedded parts 31 are also pre-embedded and fixed on the inner side of the concrete lining 2.

[0065] In one embodiment, please refer to Figure 1-2 The above step S3 may include: laying multiple plastic-coated sealing steel plates 6 on the inner side of the concrete lining 2, such that each joint of the plastic-coated sealing steel plate 6 is aligned with one of the embedded parts 31; using the embedded parts 31 as the installation points, assembling the sealing gasket 33, the sealing strip 32 and multiple fixing bolts 34 respectively, and then filling the sealing cavity with sealing filler 35 to form the entire assembled sealing structure 3.

[0066] Specifically, along the diameter of the energy storage chamber, from the outside to the inside, the energy storage chamber consists of: a concrete lining 2, embedded parts 31 (including crack guides 314), a first sealing layer 331, a plastic-coated sealing steel plate 6, a second sealing layer 332, and a sealing strip 32. Multiple fixing bolts 34 are used to secure the embedded parts 31 (including crack guides 314), the first sealing layer 331, the plastic-coated sealing steel plate 6, the second sealing layer 332, and the sealing strip 32. After fixing, sealing filler 35 can be injected into the sealing cavity at the joint, filling the gap between the sealing strip 32 and the embedded parts 31.

[0067] Understandably, the above-mentioned methods can be used to connect and seal all joints formed by splicing the plastic-coated sealing steel plates 6, thereby forming a complete sealed structure for the energy storage chamber. After the installation of the above-mentioned prefabricated sealing structure 3 is completed, a test gas storage can be conducted to perform a seal test and ensure the integrity of the energy storage chamber sealing system.

[0068] In one implementation scenario, please refer to Figure 1-2 Taking an energy storage chamber with a diameter of 6m and a concrete lining thickness of 400mm as an example, the specific implementation steps can be as follows: The concrete lining 2 can be formed by one-time casting of self-waterproof unreinforced steel fiber C40 concrete. The embedded part 31 can be a 300mm wide, 10mm thick, irregular steel strip with bolt holes spaced 150mm apart on both sides. Before casting, the embedded part 31 is fixed on the casting template. One embedded part 31 is set every 60° along the circumference, for a total of 6.

[0069] Concrete pouring can begin at the arch crown to avoid displacement of the formwork due to pressure caused by unilateral pouring, ensuring the concrete surface rises evenly to cover the entire steel pipe section. In actual operation, the concrete should be fed from the inside out, gradually pushing the backfill outwards. The concrete pump should maintain a certain pressure for a certain period to ensure the top arch is fully backfilled with concrete, and the steel pipe should be tapped with a rubber mallet to check. Concrete can then be pumped again at the end formwork 5 until it reaches the edge of end formwork 5 and the highest point of the rock surface. Pumping should then be stopped, and the hole immediately sealed. After ensuring the concrete strength meets design requirements, the formwork is removed.

[0070] Then, the installation of the prefabricated sealing system can begin. Specifically, the prefabricated sealing system is installed using the embedded part 31 as the installation point. Along the diameter of the chamber, from the outside to the inside, it consists of: concrete lining 2, embedded part 31, first sealing layer 331, plastic-coated sealing steel plate 6, second sealing layer 332, and sealing strip 32.

[0071] The entire prefabricated sealing structure 3 can be fixed by multiple fixing bolts 34. Therefore, during installation and positioning, the bolt holes of the sealing strip 32 and the plastic-coated sealing steel plate 6 should be aligned with the bolt holes of the embedded part 31. Then, the contact surface is tightened with fixing bolts 34, and sealing filler 35 is injected into the sealing cavity at the joint to fill the gap and ensure the sealing effect.

[0072] It should be noted that, in this embodiment, the use of the assembled sealing structure 3 to seal the joints of the plastic-coated sealing steel plate 6 is more adaptable to the injection and extraction conditions of the energy storage chamber compared to traditional welded joints or other existing sealing structures.

[0073] The sealing strip 32 serves as an elastic deformation reserve structure for the sealing layer, possessing a certain deformation release capability. When the chamber is subjected to cyclic tensile and compressive stress, the sealing layer can expand outwards along with the surrounding rock 1 and concrete lining 2 without yielding. During pressing, the chamber expands outwards as a whole, and the arch radius of the protrusion 321 on the sealing strip 32 can increase to increase the arch span and achieve circumferential elongation of the sealing layer; during depressurization, the arch radius shrinks due to unloading. The sealing gasket 33 avoids hard contact between components and fills gaps at bolt holes, improving the sealing effect. The acrylate filler provides support for the deformation of the above structure and adapts to tensile deformation. Therefore, the combined sealing system of "sealing strip 32 + sealing gasket 33 + sealing filler 35" reduces the construction accuracy requirements and provides redundancy in the sealing system.

[0074] Meanwhile, in this embodiment, the crack guide 314 can reduce the thickness of the concrete lining 2 section, creating a weak point and guiding the cracks to occur in a specific direction, avoiding random crack generation and reducing the risk of shear failure of the sealing system. Simultaneously, the prefabricated sealing structure 3 provides support and protection at the crack location, reducing the impact of the crack on the sealing layer and lowering the crack-limiting design requirements for the concrete lining 2.

[0075] In addition, in this embodiment, the prefabricated sealing structure 3 is positioned by embedded parts 31 and the sealing layer is installed in a prefabricated manner, which facilitates construction operations, greatly reduces the amount of on-site welding work, reduces the requirements for the precision of on-site construction, and helps to improve construction efficiency and construction quality.

[0076] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0077] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A fabricated seal structure, characterized by, The application relates to a sealing structure for a gap to be sealed. The sealing structure comprises: a positioning member arranged on one side of the gap to be sealed and used for positioning the gap to be sealed; a sealing member arranged on the side of the gap to be sealed, away from the positioning member, and covering the gap to be sealed; a sealing layer clamped between the positioning member and the sealing member and used for realizing contact surface sealing; a plurality of fixing members for fixing the positioning member and the sealing member so that the positioning member and the sealing member clamp the sealing layer; and 2. The fabricated containment structure of claim 1, wherein, a sealing filler for filling the gap between the positioning member and the sealing member and used for realizing sealing insurance.

3. The fabricated containment structure of claim 2, wherein, The sealing member is a sealing strip arranged along the gap to be sealed, and the shape or overall shape of the sealing strip on the side close to the gap to be sealed is adapted to the shape of the adjacent surface of the object to be sealed.

4. The fabricated containment structure of claim 1, wherein, A protruding part is arranged on the sealing strip at a position corresponding to the gap to be sealed, and the protruding part protrudes towards the side away from the positioning member so as to form a sealing cavity between the sealing strip and the positioning member for filling the sealing filler. The sealing layer comprises: at least one first sealing layer clamped between the positioning member and the object to be sealed and used for sealing the gap between the positioning member and the object to be sealed; and 5. The fabricated containment structure of claim 4, wherein, at least one second sealing layer clamped between the sealing member and the object to be sealed and used for sealing the gap between the sealing member and the object to be sealed.

6. The fabricated containment structure of claim 1, wherein, The sealing layer is a high polymer sealing rubber, and the material is ethylene-propylene-diene rubber.

7. The fabricated containment structure of claim 6, wherein, The shape or overall shape of the positioning member on the side close to the gap to be sealed is adapted to the shape of the adjacent surface of the object to be sealed, and a crack guide is fixedly arranged on the side of the positioning member away from the sealing member, and the position of the crack guide on the positioning member corresponds to the position of the gap to be sealed. The positioning member comprises: an arch part corresponding to the position of the gap to be sealed and protruding towards the side away from the sealing member; two extension parts arranged on opposite sides of the arch part along the width direction of the gap to be sealed and configured to abut against the sealing layer; and 8. The fabricated containment structure according to any one of claims 1-7, wherein, a plurality of connecting parts arranged on the two extension parts and used for connecting the plurality of fixing members.

9. An energy storage cavern, characterized in that, The sealing filler is an acrylic salt filler, and the acrylic salt filler fills the gap between the positioning member and the sealing member when solidified.

10. A sealing method, characterized by, The application relates to a concrete lining and a plurality of plastic-coated sealing steel plates arranged in the concrete lining, and at least one joint of the plurality of plastic-coated sealing steel plates is provided with the assembled sealing structure as claimed in any one of claims 1 to 8. The application is applied to the energy storage chamber as claimed in claim 9 and comprises the following steps: S1, form a mold and fix the positioning member on the inner side of the mold; S2, pour concrete, and after the concrete is solidified, the mold is removed to form a concrete lining with the positioning member pre-buried and fixed; S3, use the positioning member as a mounting point, and arrange the assembled sealing structure to seal the joint between the two plastic-coated sealing steel plates on the inner side of the concrete lining; S4, sealing detection.

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