Compressed air energy storage power station silo-type chamber, underground storage facilities and construction methods

Abstract

This invention discloses a silo-type chamber for compressed air energy storage power stations, underground storage facilities, and construction methods, relating to the field of underground energy storage technology. It includes: a storage chamber body, which is a hollow, sealed structure with a hemispherical top, a cylindrical middle section, and a dish-shaped bottom. From the outside to the inside, the storage chamber body is sequentially equipped with a concrete lining layer and a steel lining sealing layer. The outer wall of the concrete lining layer is fixed to the surrounding rock, and the steel lining sealing layer is fixed to the inner wall of the concrete lining layer. The steel lining sealing layer is used to contain compressed air, and the concrete lining layer is used to bear the load of the compressed air and transfer it to the surrounding rock. It has a wide range of applications, effectively saves costs, and offers high cost-effectiveness.

Description

Technical Field

[0001] This invention relates to the field of underground energy storage technology, and in particular to a silo-type chamber for compressed air energy storage power station, underground storage facilities, and construction methods. Background Technology

[0002] Compressed air energy storage technology is essentially a technology that uses high-pressure air to store "waste energy" from the power grid and convert it into electricity. As a large-capacity, long-duration physical energy storage technology, it can significantly improve the spatiotemporal structure of power generation and consumption, increase the grid's peak-shaving capacity, and solve the problem of intermittency of renewable energy. At the same time, compressed air energy storage technology does not involve the combustion of fossil fuels and does not emit any harmful substances, making it more environmentally friendly.

[0003] New compressed air energy storage systems primarily utilize surface tanks, abandoned underground mines, aquifers, salt caves, and natural or artificial underground hard rock caves as high-pressure air storage containers. Currently, commercially operational compressed air energy storage power plants both domestically and internationally mainly use underground salt caverns as storage devices. In comparison, surface tanks rely entirely on steel constraints, requiring thick steel plates to withstand 10MPa pressure, resulting in high costs and limiting their suitability to small-scale gas storage. Abandoned underground mines, aquifers, and salt caverns are all constrained by specific geographical and regional geological conditions, making widespread adoption difficult despite their lower cost. Rock-lined underground hard rock gas storage caverns are less affected by geographical factors, allowing for the selection of suitable hard rock strata for construction based on engineering geological surveys, and enabling the design of storage parameters independently, resulting in a high degree of adaptability.

[0004] With the development of large-capacity (hundred-megawatt level) long-duration compressed air energy storage technology, the design volume of gas storage devices must reach 100,000 m3, the maximum internal pressure must be at least 6-10 MPa, the internal pressure difference must reach 2-6 MPa, the storage time must be controlled at 4-8 hours, and the daily pressurization and depressurization cycle must be 0-4 times. Due to the complex geological conditions of salt caverns, natural mine caverns, etc., higher requirements are placed on the stability and integrity of the surrounding rock of the gas storage device under the above-mentioned high-pressure long-cycle circulating gas storage conditions. Rock-lined underground caverns are becoming the preferred choice for underground gas storage devices in my country's compressed air energy storage technology due to their advantages in high construction efficiency, independent selection and design, and parameter control.

[0005] Currently, the design and selection of rock-lined underground gas storage caverns mainly focuses on horizontal circular cross-section tunnels, which have small cross-sectional dimensions and large axial lengths, resulting in large internal surface areas and high lining costs. To ensure the long-term stability of underground gas storage caverns and to further reduce investment costs while adhering to a two-year construction period, exploring cost-effective and efficient rock-lined compressed air energy storage cavern design and supporting construction methods has become an urgent issue. Summary of the Invention

[0006] The purpose of this invention is to provide a silo-type chamber for compressed air energy storage power stations, underground storage facilities, and construction methods to solve the problems existing in the prior art. It has a wide range of applications, effectively saves costs, and has a high cost-performance ratio.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention provides a silo-type chamber for compressed air energy storage power stations, comprising: a storage chamber body, wherein the storage chamber body is a hollow, sealed structure with a hemispherical top, a cylindrical middle section, and a dish-shaped bottom; a concrete lining layer and a steel lining sealing layer are sequentially arranged on the storage chamber body from the outside to the inside; the outer wall of the concrete lining layer is fixed to the surrounding rock; the steel lining sealing layer is fixed to the inner wall of the concrete lining layer; the steel lining sealing layer is used to contain compressed air; and the concrete lining layer is used to bear the load of the compressed air and transfer it to the surrounding rock.

[0009] Preferably, the gas storage chamber body has a hemispherical space at the top as a top arch, a cylindrical space in the middle as a core cylinder, and a dish-shaped space at the bottom as an inverted arch. The upper opening of the core cylinder is integrally connected to the top arch, and the lower opening of the core cylinder is integrally connected to the inverted arch. The diameter of the top arch is less than or equal to 50m, the radius of the core cylinder is the same as the radius of the top arch, the height of the core cylinder is 40-60m, the radius of the inverted arch is the same as the radius of the core cylinder, and the height of the inverted arch is 1 / 3 to 1 / 2 of the radius of the core cylinder.

[0010] Preferably, the concrete lining layer includes an initial support lining layer, a waterproof layer, and a secondary support lining layer. The initial support lining layer includes a shotcrete layer, anchor bolts, and reinforcing mesh, used to reinforce the newly excavated surrounding rock mass in a timely manner and maintain the basic stability of the surrounding rock during construction. The reinforcing mesh is laid on the surrounding rock, the shotcrete layer is sprayed on the surrounding rock and wraps around the reinforcing mesh, one end of the anchor bolt is fixed to the shotcrete layer, and the other end is anchored in the surrounding rock. The waterproof layer is fixed on the side of the initial support lining layer away from the surrounding rock. The secondary support lining layer is a cast-in-place reinforced concrete layer, which is fixed on the side of the waterproof layer away from the initial support lining layer. Part of the steel lining sealing layer is embedded in the cracks of the cast-in-place reinforced concrete layer.

[0011] Preferably, the concrete in the cast-in-place reinforced concrete layer is steel fiber reinforced concrete.

[0012] Preferably, it also includes a rubber material buffer layer, which is fixedly disposed between the cast-in-place reinforced concrete layer and the steel lining sealing layer.

[0013] This invention also provides a silo-type underground storage facility for compressed air energy storage power stations, comprising: a surrounding rock structure, a silo-type chamber for compressed air energy storage power stations as described above, a vertical shaft, an inclined shaft, a first sealing plug, and a second sealing plug. The surrounding rock structure is provided with a receiving space; the main body of the gas storage chamber is fitted and fixed to the inner wall of the receiving space; the vertical shaft is disposed in the stratum rock mass at the top of the main body of the gas storage chamber to vertically connect the main body of the gas storage chamber to the ground surface; the inclined shaft is disposed in the stratum rock mass from the bottom of the main body of the gas storage chamber to the ground surface to inclinedly connect the main body of the gas storage chamber to the ground surface; the first sealing plug is fixedly disposed at the connection between the main body of the gas storage chamber and the vertical shaft to seal the main body of the gas storage chamber; the second sealing plug is fixedly disposed at the connection between the main body of the gas storage chamber and the inclined shaft to seal the main body of the gas storage chamber.

[0014] Preferably, the shaft has a circular cross-section and a diameter of 3 to 6 meters. The shaft serves as a passage for hoisting equipment and personnel during the excavation of the gas storage chamber, as well as a backup passage for installing gas transmission pipelines.

[0015] Preferably, the inclined shaft has a cross-sectional shape of a circular arch with a straight wall and an inverted arch. The inclined shaft is used for the excavation of the gas storage chamber body for slag removal, material feeding, drainage, gas pipeline installation, and maintenance during later operation. The design slope of the inclined shaft does not exceed 25°. The inclined shaft adopts a rail-guided traction transportation method and is equipped with 2 to 4 transportation tracks.

[0016] Preferably, the second sealing plug at the inclined shaft adopts a conical design and is integrally formed by cast reinforced concrete, and the gas transmission pipeline is anchored in the second sealing plug. The first sealing plug at the vertical shaft adopts a cylindrical design and is integrally formed by cast reinforced concrete, and the spare gas transmission pipeline is anchored in the first sealing plug.

[0017] The present invention also provides a construction method for a silo-type underground storage facility for compressed air energy storage power stations as described in any of the preceding claims, comprising the following steps:

[0018] S1, the inclined shaft is excavated from the ground surface to the bottom of the gas storage chamber body;

[0019] S2, vertically excavate the inclined shaft from the ground surface to the top of the gas storage chamber body;

[0020] S3, excavate the containing space and construct the gas storage chamber body: starting from the bottom of the shaft, excavate the top hemispherical structure, then excavate the middle cylindrical and bottom dish-shaped structures in sequence, and construct the concrete lining layer and steel lining sealing layer.

[0021] S4, install the first sealing plug and the second sealing plug.

[0022] The present invention achieves the following technical effects compared to the prior art:

[0023] This invention provides a silo-type chamber for compressed air energy storage power stations, underground storage facilities, and construction methods. By designing the gas storage chamber body as a hollow, sealed structure with a hemispherical top, a cylindrical middle section, and a dish-shaped bottom, the gas storage chamber body provided by this invention has greater applicability compared to underground abandoned mines, aquifers, salt rock caves, and natural or artificial underground hard rock caves as high-pressure air storage containers. Compared to surface storage tanks or small-section, long tunnel-type gas storage chamber structures, it can save approximately 50% and 30% of the construction cost, respectively, for the same gas storage capacity. Furthermore, due to the small footprint of the gas storage chamber body, it can flexibly avoid faults of varying sizes and strata with poor rock quality in the proposed construction area based on engineering survey results, while selecting an appropriate burial depth. The surface land protection area is also greatly reduced, allowing direct construction in the underlying strata of the compressed air energy storage power station, further reducing the land acquisition area and minimizing the impact on the surrounding geological environment. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the silo-type chamber of the compressed air energy storage power station provided by the present invention;

[0026] Figure 2 Detailed drawing of the edge lining of the gas storage chamber body in the silo-type chamber of the compressed air energy storage power station provided by the present invention;

[0027] Figure 3 A partial circumferential cross-sectional view of the gas storage chamber body after high temperature and high internal pressure gas loading in the silo-type chamber of the compressed air energy storage power station provided by the present invention.

[0028] Figure 4 A partial circumferential cross-sectional view of the gas storage chamber body after the high-temperature and high-pressure gas is unloaded in the silo-type chamber of the compressed air energy storage power station provided by the present invention.

[0029] Figure 5 A front view of the silo-type underground storage facility for compressed air energy storage power stations provided by the present invention;

[0030] Figure 6 A top view of the silo-type underground storage facility for compressed air energy storage power station provided by the present invention;

[0031] Figure 7 This is a front view of the connection between the inclined shaft and the gas storage chamber in the silo-type underground storage facility of the compressed air energy storage power station provided by the present invention.

[0032] Figure 8 This is a front view of the connection between the vertical shaft and the gas storage chamber in the silo-type underground storage facility of the compressed air energy storage power station provided by the present invention.

[0033] Figure 9 Cross-sectional view of the inclined shaft tunnel in the silo-type underground storage facility of the compressed air energy storage power station provided by the present invention;

[0034] Figure 10 A front view demonstrating the construction method of the silo-type underground storage facility for compressed air energy storage power station provided by the present invention;

[0035] Figure 11 A front view demonstrating the construction method of the silo-type underground storage facility for compressed air energy storage power station provided by the present invention;

[0036] Figure 12 A top view illustrating the construction method of the silo-type underground storage facility for compressed air energy storage power station provided by the present invention;

[0037] In the diagram: 1. Gas storage chamber body; 2. Top arch; 3. Core cylinder; 4. Inverted arch; 5. Concrete lining layer; 6. Inclined shaft; 7. Vertical shaft; 8. Steel lining sealing layer; 9. Initial support lining layer; 10. Anchor bolt; 11. Secondary support lining layer; 12. Waterproof layer; 13. Gas transmission pipeline; 14. Second sealing plug; 15. First sealing plug; 16. Transport track; 17. Mine car; 18. Pilot shaft; 19. Lower pilot tunnel; 20. Excavation sequence; 21. Surrounding rock; 22. Rubber material buffer layer; 23. Crack; 24. Effect of high temperature and high pressure gas. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The purpose of this invention is to provide a silo-type chamber for compressed air energy storage power stations, underground storage facilities, and construction methods to solve the problems existing in the prior art. It has a wide range of applications, effectively saves costs, and has a high cost-performance ratio.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] This embodiment provides a silo-type chamber for compressed air energy storage power stations, such as... Figures 1-3 As shown, it includes: a gas storage chamber body 1, which is a hollow sealed structure with a hemispherical top, a cylindrical middle section, and a dish-shaped bottom. The overall height is 60-90m, the maximum width is 30-50m, the boundary transition is smooth, the shape design conforms to the design principle of mechanical devices, the overall stress state is uniform, and there is no local stress concentration. The gas storage chamber body 1 is provided with a concrete lining layer 5 and a steel lining sealing layer 8 arranged sequentially from the outside to the inside. The outer wall of the concrete lining layer 5 is attached and fixed to the surrounding rock 21, and the steel lining sealing layer 8 is fixed to the inner wall of the concrete lining layer 5. The steel lining sealing layer 8 is used to contain compressed air, and the concrete lining layer 5 is used to bear the load of the compressed air and transfer it to the surrounding rock 21. By setting the gas storage chamber body 1 as a hollow sealed structure with a hemispherical top, a cylindrical middle and a dish-shaped bottom, the gas storage chamber body 1 provided by the present invention has higher applicability than underground abandoned mines, aquifers, salt rock caves and natural or artificial underground hard rock caves as high-pressure air storage containers. Compared with ground storage tanks or small cross-section, long tunnel gas storage cavern structures, it can save about 50% and 30% of the cost respectively under the same gas storage scale. Furthermore, since the gas storage chamber 1 occupies a small area, it can flexibly avoid faults of varying sizes and strata with poor rock quality in the proposed area based on the results of engineering surveys. At the same time, it can select an appropriate burial depth, and the surface land protection area is greatly reduced. It can be directly built in the lower strata of the compressed air energy storage power station, further reducing the land acquisition area and minimizing the impact on the surrounding geological environment.

[0043] In a preferred embodiment, the top hemispherical space of the gas storage chamber body 1 is the top arch 2, the middle cylindrical space is the core cylinder 3, and the lower dish-shaped space is the inverted arch 4. The diameter of the top arch 2 is less than or equal to 50m, the radius of the core cylinder 3 is the same as the radius of the top arch 2, and the height is generally between 40 and 60m; the radius of the inverted arch 4 is the same as the radius of the core cylinder 3, and the height of the inverted arch 4 is 1 / 3 to 1 / 2 of the radius of the core cylinder 3.

[0044] In a preferred embodiment, the concrete lining layer 5 includes an initial support lining layer 9, a waterproof layer 12, and a secondary support lining layer 11. The initial support lining layer 9 includes a shotcrete layer, anchor bolts 10, and reinforcing mesh, used to reinforce the newly excavated surrounding rock 21 in a timely manner and maintain the basic stability of the surrounding rock 21 during construction. The reinforcing mesh is laid on the surrounding rock 21, and the shotcrete layer is sprayed onto the surrounding rock 21 and wraps around the reinforcing mesh. One end of the anchor bolt 10 is fixed to the shotcrete layer, and the other end is anchored in the surrounding rock 21. The waterproof layer 12 is fixed inside the initial support lining layer 9. The secondary support lining layer 11 is a cast-in-place reinforced concrete layer, which is fixed inside the waterproof layer 12. Part of the steel lining sealing layer is embedded in the cracks 23 of the cast-in-place reinforced concrete layer. The concrete in the cast-in-place reinforced concrete layer is steel fiber reinforced concrete. The steel fiber reinforced concrete can effectively control the development of cracks 23 in the air lining layer under high internal pressure, making the cracks 23 more uniform. Simultaneously, it improves the fatigue resistance of the sealing structure under compressed air release cyclic load. During the initial gas storage, high-temperature gas is introduced, which reduces the yield strength of the steel sealing layer and makes it easier to enter the plastic deformation stage. At the same time, the gas pressure in the artificial chamber is increased, causing uniform cracks 23 to appear in the steel fiber reinforced concrete lining layer 5. At this time, the steel lining sealing layer adheres tightly to the steel fiber reinforced concrete lining layer 5 under the action of high-temperature and high-pressure gas 24 and is embedded in the cracks 23 of the steel fiber reinforced concrete lining layer 5. During the release stage, due to the plastic deformation of the steel lining, the deformation will not be completely restored after unloading. Therefore, the steel lining sealing layer will be embedded in the cracks 23 of the steel fiber reinforced concrete lining layer 5. At the same time, the cracks 23 of the steel fiber reinforced concrete lining layer 5 contract and tightly adhere to the plastic steel lining embedded in the cracks 23, providing additional interlocking force so that the two will not separate during the subsequent gas storage and release process, forming a stable stress-bearing whole and ensuring the sealing effect of the steel lining sealing layer 8.

[0045] In a preferred embodiment, the grade of the shotcrete used in the initial support lining layer 9 should not be higher than C25; the anchor bolts 10 can be non-prestressed or low-prestressed hollow grouting anchor bolts 10; the thickness of the initial support lining layer 9 is controlled between 15cm and 25cm.

[0046] In a preferred embodiment, the waterproof layer 12 includes geotextile and waterproof board. The geotextile serves as an isolation and filter, while the waterproof board, as the main waterproofing material, ensures that the secondary lining concrete can effectively withstand external water pressure after cracking, and prevents external water from seeping into the tunnel interior along the concrete cracks 23 and corroding the steel lining sealing layer 8.

[0047] In a preferred embodiment, the gas storage chamber body 1 further includes a rubber material buffer layer 22. The rubber material buffer layer 22 is fixedly disposed between the cast-in-place reinforced concrete layer and the steel lining sealing layer. The rubber material buffer layer 22 is composed of multiple polymer material plates connected by heat fusion bonding. The joint between two polymer material plates is no less than 80mm, and the bond peel strength is no less than 80% of the tensile strength of the polymer material plate. Adding the polymer rubber buffer material can prevent direct contact between the steel sealing layer and the steel fiber reinforced concrete lining layer 5, extending the service life of the steel lining sealing layer. In addition, it can improve the airtightness of the system. The rubber material buffer layer 22 is butyl rubber.

[0048] Example 2

[0049] This embodiment also provides a silo-type underground storage facility for compressed air energy storage power stations, including: a surrounding rock structure 21, a silo-type chamber for compressed air energy storage power stations as described in Embodiment 1, a vertical shaft 7, an inclined shaft 6, a first sealing plug 15, and a second sealing plug 14. The surrounding rock structure 21 is provided with a receiving space; the gas storage chamber body 1 is fitted and fixed to the inner wall of the receiving space; the vertical shaft 7 is set in the stratum rock mass at the top of the gas storage chamber body 1 to vertically connect the gas storage chamber body 1 to the ground surface; the inclined shaft 6 is set in the stratum rock mass from the bottom of the gas storage chamber body 1 to the ground surface to inclinedly connect the gas storage chamber body 1 to the ground surface; the first sealing plug 15 is fixedly set at the connection between the gas storage chamber body 1 and the vertical shaft 7 to seal the gas storage chamber body 1; the second sealing plug 14 is fixedly set at the connection between the gas storage chamber body 1 and the inclined shaft 6 to seal the gas storage chamber body 1.

[0050] In a preferred embodiment, the shaft 7 has a circular cross-section and a diameter of 3 to 6 meters. The diameter can be determined based on the size of the maximum hoisting machinery and the efficiency of the excavation operation. The shaft 7 serves as a passage for hoisting equipment and personnel to enter and exit during the excavation of the gas storage chamber body 1, as well as a passage for the installation of the spare gas transmission pipeline 13.

[0051] In a preferred embodiment, the inclined shaft 6 has a cross-sectional shape of a circular arch with a straight wall and an inverted arch type 4. The inclined shaft 6 is used for the excavation and slag removal, material feeding, drainage, installation of gas pipeline 13, and maintenance during the later operation of the gas storage chamber body 1. The cross-sectional dimensions are determined according to the maximum material size and the excavation and construction efficiency. The design slope of the inclined shaft 6 does not exceed 25°. The inclined shaft 6 adopts a rail traction transportation method and is equipped with 2 to 4 transportation tracks 16.

[0052] In a preferred embodiment, the second sealing plug 14 at the inclined shaft 6 adopts a conical design and is integrally formed by cast reinforced concrete. The gas transmission pipeline 13 is anchored in the second sealing plug 14. The first sealing plug 15 at the vertical shaft 7 adopts a cylindrical design and is integrally formed by cast reinforced concrete. The spare gas transmission pipeline 13 is anchored in the first sealing plug 15.

[0053] Example 3

[0054] This embodiment also provides a construction method for a silo-type underground storage facility for compressed air energy storage power stations, including the following steps:

[0055] Step (1): During the feasibility study phase of the compressed air energy storage power station project, the site selection, burial depth, size, lining scheme of the gas storage chamber 1, as well as the length, size, and lining scheme of the vertical shaft 7 and the inclined shaft 6 are determined based on the engineering geological survey data.

[0056] Step (2): Excavate the inclined shaft 6 using the drill and blast method. Select the excavation method according to the classification of the surrounding rock 21 (for surrounding rock of Class III or above, full-section one-time excavation can be used; for surrounding rock of Class IV and V, step-by-step excavation can be used). Excavate according to the principle of "weak blasting, short advance, strong support, early lining, and frequent monitoring". Perform initial support of the inclined shaft 6 in a timely manner, and perform waterproof layer 12, secondary lining and invert arch 4 as appropriate. Perform excavation and support at the same time, and lay the slag transport track 16 simultaneously. Transport all slag to the tunnel entrance through the track mine car 17.

[0057] Step (3): Excavate the vertical shaft 7 using the reverse shaft method. Select the size of the reverse shaft drilling rig according to the design cross-section size. Drill the guide shaft 18 from the ground surface down to the bottom platform of the inclined shaft 6. Use a large-sized cutting tool to raise the drill and enlarge the hole to form a slag chute. Excavate the entire cross-section from the ground surface down by manual drilling and blasting. Sequentially construct the initial support layer, waterproof layer 12, and secondary lining until the interface between the hemispherical space of the top arch 2 of the gas storage chamber body 1 and the central cylindrical space. The slag is discharged through the middle guide shaft 18 to the bottom of the inclined shaft 6.

[0058] Step (4): Excavate the main body 1 of the gas storage chamber. Starting from the bottom of the vertical shaft 7 excavated in step (3), excavate the top arch 2 using the drill-and-blast method. Then, excavate the middle core tube and the lower dish-shaped space in sequence downwards. Excavate in 20 steps according to the excavation sequence of "spiral outwards and layer by layer downwards". The waste is transported out to the bottom of the inclined shaft 6 by gravity through the middle guide shaft 18. The initial support lining layer 9 is constructed in a timely manner, and the waterproof layer 12 and the secondary support lining layer 11 are constructed in a timely manner.

[0059] Step (5): After the gas storage chamber body 1 is excavated, the steel plates are transported in sections to the gas storage chamber body 11 through the bottom inclined shaft 6 for assembly and welding to form a fully enclosed sealing layer.

[0060] Step (6): Based on the actual location of the ground plant of the compressed air energy storage power station, select the inclined shaft 6 to install the gas transmission pipeline 13 and connect it to the equipment of the ground plant. At the same time, install a sealing plug at the connection between the pipeline and the gas storage chamber body 1.

[0061] Step (7): Modify vertical shaft 7 or inclined shaft 6 to construct a dedicated drainage and maintenance channel during the operation period.

[0062] In step (2), after excavating the inclined shaft 6 to the bottom dish-shaped space of the gas storage chamber body 1, the inclined shaft 6 should be leveled and a small section of the inclined shaft 6 cross-section should be widened to leave space for construction and slag loading operations. The number of transport tracks 16 can also be increased by dividing the tracks to improve the slag removal and rotation efficiency. In order to implement the reverse drilling method, a lower guide tunnel 19 should be constructed at the bottom of the gas storage chamber body 11 and connected to the inclined shaft 6.

[0063] When installing the sealing plugs at the 6th location of the inclined shaft in step (6), a switchable sealing door should be installed for later operation to allow access to the interior of the gas storage chamber 1 for maintenance.

[0064] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A silo-type chamber for compressed air energy storage power stations, characterized in that: include: The gas storage chamber body is a hollow, sealed structure with a hemispherical top, a cylindrical middle section, and a dish-shaped bottom. From the outside to the inside, the gas storage chamber body is provided with a concrete lining layer and a steel lining sealing layer. The outer wall of the concrete lining layer is fixed to the surrounding rock, and the steel lining sealing layer is fixed to the inner wall of the concrete lining layer. The steel lining sealing layer is used to contain compressed air, and the concrete lining layer is used to bear the load of the compressed air and transfer it to the surrounding rock. The concrete lining layer includes an initial support lining layer, a waterproof layer, and a secondary support lining layer. The waterproof layer is fixed to the side of the initial support lining layer away from the surrounding rock. The secondary support lining layer is a cast-in-place reinforced concrete layer, which is fixed to the side of the waterproof layer away from the initial support lining layer. During the initial gas storage, gas is introduced, causing the yield strength of the steel lining sealing layer to decrease and enter the plastic deformation stage. At the same time, the gas pressure in the artificial chamber is increased, causing cracks to appear in the cast-in-place reinforced concrete layer. Under the action of the gas, the steel lining sealing layer adheres tightly to the cast-in-place reinforced concrete layer and is embedded in the cracks. During the gas release stage, the cracks in the cast-in-place reinforced concrete layer shrink, tightly adhering to the steel lining sealing layer embedded in the cracks, causing part of the steel lining sealing layer to embed into the cracks in the cast-in-place reinforced concrete layer.

2. The silo-type chamber for compressed air energy storage power station according to claim 1, characterized in that: The gas storage chamber body has a hemispherical space at the top as a top arch, a cylindrical space in the middle as a core cylinder, and a dish-shaped space at the bottom as an inverted arch. The upper opening of the core cylinder is integrally connected to the top arch, and the lower opening of the core cylinder is integrally connected to the inverted arch. The diameter of the top arch is less than or equal to 50m, the radius of the core cylinder is the same as the radius of the top arch, the height of the core cylinder is 40-60m, the radius of the inverted arch is the same as the radius of the core cylinder, and the height of the inverted arch is 1 / 3 to 1 / 2 of the radius of the core cylinder.

3. The silo-type chamber for compressed air energy storage power station according to claim 1, characterized in that: The initial support lining layer includes a shotcrete layer, anchor bolts, and reinforcing mesh. The reinforcing mesh is laid on the surrounding rock, the shotcrete layer is sprayed on the surrounding rock and wraps the reinforcing mesh, and one end of the anchor bolt is fixed to the shotcrete layer, while the other end is anchored in the surrounding rock.

4. The silo-type chamber for compressed air energy storage power station according to claim 3, characterized in that: The concrete in the cast-in-place reinforced concrete layer is steel fiber reinforced concrete.

5. The silo-type chamber for compressed air energy storage power station according to claim 4, characterized in that: It also includes a rubber material buffer layer, which is fixedly disposed between the cast-in-place reinforced concrete layer and the steel lining sealing layer.

6. A silo-type underground storage facility for compressed air energy storage power stations, characterized in that: include: The surrounding rock structure has a receiving space. The compressed air energy storage power station silo-type chamber as described in any one of claims 1 to 5, wherein the main body of the air storage chamber is fitted and fixed to the inner wall of the accommodating space; A vertical shaft is provided in the rock mass at the top of the gas storage chamber body to vertically connect the gas storage chamber body to the ground surface; An inclined shaft is provided in the strata rock mass from the bottom of the gas storage chamber body to the ground surface to connect the gas storage chamber body to the ground surface at an incline; The first sealing plug is fixedly installed at the connection between the gas storage chamber body and the vertical shaft to seal the gas storage chamber body. The second sealing plug is fixedly installed at the connection between the gas storage chamber body and the inclined shaft to seal the gas storage chamber body.

7. The compressed air energy storage power station silo-type underground storage facility according to claim 6, characterized in that: The vertical shaft has a circular cross-section and a diameter of 3 to 6 meters. The vertical shaft is used for hoisting equipment and personnel to enter and exit during the excavation of the gas storage chamber, as well as for the installation of backup gas transmission pipelines.

8. The compressed air energy storage power station silo-type underground storage facility according to claim 7, characterized in that: The inclined shaft has a cross-sectional shape of a circular arch with a straight wall and an inverted arch. The inclined shaft is used for the excavation and slag removal, material feeding, drainage, gas pipeline installation, and maintenance during the later operation of the gas storage chamber. The design slope of the inclined shaft does not exceed 25°. The inclined shaft adopts a rail-guided traction transportation method and is equipped with 2 to 4 transport tracks.

9. The compressed air energy storage power station silo-type underground storage facility according to claim 8, characterized in that: The second sealing plug at the inclined shaft adopts a conical design and is integrally formed by cast reinforced concrete. The gas transmission pipeline is anchored in the second sealing plug. The first sealing plug at the vertical shaft adopts a cylindrical design and is integrally formed by cast reinforced concrete. The spare gas transmission pipeline is anchored in the first sealing plug.

10. A construction method for a silo-type underground storage facility for compressed air energy storage power stations as described in any one of claims 6 to 9, characterized in that: Includes the following steps: S1, the inclined shaft is excavated from the ground surface to the bottom of the gas storage chamber body, and the vertical shaft is excavated from the ground surface to the top of the gas storage chamber body; S2, excavate the containing space and construct the gas storage chamber body: starting from the bottom of the shaft, excavate the top hemispherical structure, then excavate the middle cylindrical and bottom dish-shaped structures in sequence, and construct the concrete lining layer and steel lining sealing layer. S3, install the first sealing plug and the second sealing plug.

Images