Compressed air energy storage underground chamber inner arch type cylindrical shell composite lining structure

Abstract

A compressed air energy storage underground chamber inner arch type cylindrical shell composite lining structure relates to the technical field of new energy engineering structures, and structurally comprises a surrounding rock, a steel-concrete outer layer lining, a cylindrical shell support extrusion connecting device, an inner arch type cylindrical shell support and an inner arch type cylindrical shell from outside to inside; a plurality of inner arch type cylindrical shell sections are connected to form an inner arch type cylindrical shell longitudinal joint, and a plurality of inner arch type cylindrical shells are sequentially connected to form a closed gas storage space. The method has the beneficial effects that a plurality of inner arch type cylindrical shells with proper spans are arranged on the inner wall of the outer layer lining, so that a high-internal-pressure gas storage load is converted into axial pressure of the inner arch type cylindrical shells, compression stress between arch type cylindrical shell supports, distribution pressure of the outer layer lining and radial pressure of far-end surrounding rock; on the premise that the space utilization rate of the gas storage chamber is not obviously weakened, circumferential deformation, circumferential stress and axial temperature stress of the outer lining and the near-end surrounding rock are reduced, and the safety of the gas storage structure and the stability of the surrounding rock are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy engineering structures, and in particular to the types and schemes of lining structures for medium and large-scale compressed air energy storage in abandoned mines. Specifically, it relates to an arched column shell composite lining structure in an underground compressed air energy storage chamber. Background Art

[0002] Compressed air energy storage gas storage reservoirs with circular, arched or horseshoe-shaped cross-sections built on abandoned mines, tunnels and caves have the characteristics of large diameter (more than 4 meters) and bearing high internal pressure cyclic gas storage loads. On the one hand, the concrete lining and proximal surrounding rock of the gas storage pressure chamber bear a large cyclic gas storage pressure and produce a large reciprocating circumferential deformation. On the other hand, this type of gas storage reservoir has the characteristic of being uneven in the extension direction of its chamber, and it is necessary to connect each compressed air energy storage chamber under the conditions of stress safety and sealing. This patent aims at the problem that the compressed air energy storage underground gas storage reservoir built on Class IV and V surrounding rocks generates annular additional tensile stress exceeding the bearing capacity of the rock in the vicinity of the surrounding rock of the chamber under the action of high internal pressure cyclic gas storage loads, and may cause tensile failure of the rock; and solves the influence of the uneven axial geometry of such gas storage reservoirs on the lining structure and surrounding rock stress, reduces the axial vibration of the lining structure in the transient state of storage / release, and weakens the longitudinal stress of the lining caused by temperature changes, and proposes the technical solution of the present invention. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a lining structure scheme in which an inner arched column shell is used in the cross section of the chamber to bear and transfer the gas storage load; and a longitudinal section structure scheme in which a sealed telescopic device is used to connect each link of the inner arched column shell lining in the axial direction.

[0004] The present invention provides an arched column shell composite lining structure in a compressed air energy storage underground cavern, comprising a cross-sectional structure and a longitudinal section structure. The cross-sectional structure is as follows: from the outside to the inside of the cavern, it is composed of surrounding rock, a steel-concrete outer lining, an extrusion connection device between column shell supports, an inner arched column shell support and an inner arched column shell; a plurality of inner arched column shells are connected in sequence to form a closed air storage space to withstand the air storage pressure.

[0005] The cross-sectional shape of the chamber is: a circular section, an arched section or a horseshoe section.

[0006] The steel-concrete outer lining is completely in contact with the surrounding rock; the column shell support extrusion connection device is connected to the arc-shaped inner side of the steel-concrete outer lining in a fixed connection manner; The extrusion connection device between the column shell supports is a double-chamber structure, which connects the adjacent inner arch column shell supports on both sides, and is connected by welding on the side near the center of the chamber to meet the gas sealing conditions; the function of the extrusion connection device between the column shell supports is to bear the annular extrusion force (annular thrust) between the inner arch column shell supports, and at the same time transfer a part of the radial pressure on the inner arch column shell supports to the steel-concrete outer lining and the proximal surrounding rock, and transfer the other part of the radial pressure on the inner arch column shell supports to the distal surrounding rock through the inner arch column shell support force transfer piles.

[0007] The inner arch column shell is completely connected to the inner arch column shell supports at both ends and meets the sealing conditions, and can be formed by a one-time press forming method; the protruding side of the inner arch column shell is close to the center of the chamber; the axis of the inner arch column shell in the cross section is an arc line, the span ratio is 0.35-0.5, the thickness is 0.01m-0.10m, and the cross-sectional span is 0.40m-1.20m; the material of the inner arch column shell is structural steel and aluminum alloy; while the inner arch column shell bears the high internal pressure gas storage load with the pressure in the direction of the arch shell axis, it converts part of the gas pressure into annular mutual thrust between adjacent inner arch column shell supports.

[0008] The inner layer (close to the column shell side) of the steel-concrete outer lining is made of metal materials such as steel and aluminum, and its thickness is 1.0cm-5.0cm; the outer layer (close to the surrounding rock side) of the steel-concrete outer lining is made of one of reinforced concrete, steel concrete, ductile fiber concrete, shotcrete, steel-concrete segments, geopolymer concrete, and high-strength concrete; the thickness of the steel-concrete outer lining is 0.3m-1.2m; the outer layer material of the steel-concrete outer lining is capable of withstanding a tensile stress greater than 0.6MPa; the function of the steel-concrete outer lining is to bear the rock pressure generated by the surrounding rock during the construction period and operation and maintenance period of the underground gas storage reservoir, and to bear and transmit part of the high internal pressure circulating gas storage load.

[0009] The longitudinal section structure is as follows: the inner arch column shell segment is the basic component unit of the longitudinal composite lining structure; a plurality of inner arch column shell segments are connected by direct welding or through an annular sealing telescopic device to form an inner arch column shell longitudinal connection.

[0010] Several inner arch column shell segments are connected to adjacent inner arch column shell segments by welding or annular sealing telescopic devices to form an axially segmented continuous inner arch column shell composite lining in the chamber; the axially segmented continuous inner arch column shell composite lining is externally connected to the steel-concrete outer lining.

[0011] The length of each inner arch column shell segment is set to 0.50m-36.00m according to the extension of the gas storage chamber space.

[0012] The inner arched column shell segments are connected by direct welding, and the column shell support extrusion connection device is continuously arranged on each inner arched column shell segment and the above-mentioned welding connection position. This direct welding method is suitable for linear connection between inner arched column shell segments.

[0013] The inner arched column shell segments are connected by an annular sealing telescopic device. At the part connected with the annular sealing telescopic device, a 0.05m-0.20m connection end is set at the end of the inner arched column shell segment. The column shell support extrusion connection device and the inner arched column shell support are not set at the connection end. The connection end is embedded in the annular sealing telescopic device and connected in a matching manner by welding to meet the high-pressure gas sealing conditions. The connection method using the annular sealing telescopic device is suitable for connecting inner arched column shell segments at the longitudinally uneven parts of the tunnel.

[0014] The structure of the annular sealing telescopic device is as follows: the external structure is an annular sleeve, an embedded connecting device is arranged inside, the embedded connecting device is hollow, the inner wall is arranged as a plurality of arches, and is matched with the connecting end of the inner arch column shell segment; an interlayer flexible elastic material is arranged between the annular sleeve and the embedded connecting device.

[0015] A vibration reduction and damping device may also be arranged inside the annular sealing and telescopic device, and the vibration reduction and damping device is located between two connection ends in the embedded connection device.

[0016] The annular sealing and telescopic device has three functions: first, it ensures the sealing of the inner arch column shell composite lining in the extension direction of the chamber, while eliminating the longitudinal stress of the column shell by allowing each link of the inner arch column shell to undergo a certain longitudinal deformation; second, the lining structure of the long-distance gas storage chamber is divided into a plurality of medium- and short-distance gas storage chamber lining structures by setting the sealing and telescopic device, which changes the vibration characteristics of the long-distance lining pipeline structure and weakens the influence of the longitudinal unevenness of the underground chamber on the lining structure and the surrounding rock stress; third, by reasonably setting the annular sealing and telescopic devices between each link and by setting a vibration reduction and damping device in the annular sealing and telescopic devices, the vibration influence of the transient flow of high-pressure gas on the lining and surrounding rock structure when the filling / release state changes is reduced, thereby playing a role in vibration protection.

[0017] The principle of the present invention is: (1) The principle that the inner arch column shell composite lining structure can significantly reduce the circumferential tensile stress of the surrounding rock caused by high internal pressure gas storage is that the column shell lining structure has four functions of dissipating and transmitting the gas storage pressure load in its cross-sectional direction. First, the inner arch column shell structure can convert the gas storage pressure load evenly distributed on its convex side into the compressive stress of the inner arch column shell, and part of the compressive stress is dissipated in the form of compression deformation of the column shell; second, the tangential thrust between adjacent inner arch column shell supports of the inner arch column shell structure, the tangential thrust is achieved through the mutual extrusion of the inner arch column shell supports to achieve its own tangential force balance, and is dissipated by the deformation of the extruded material between the column shell support connection devices; third, the radial pressure of the inner arch column shell support on the outer lining is transmitted to the outer lining of the concrete, and dissipated through the outer lining of the concrete that can withstand a certain tensile stress, and part of the compressive stress is transmitted to the surrounding rock. Fourth, the radial pressure of the inner arched column shell bearing on the surrounding rock is transmitted to the surrounding rock through the bearing force transfer pile. The inner arched column shell composite lining makes full use of the arch shell structure's ability to convert radial pressure loads into tangential thrusts. By changing the structural form of the internal lining, the circumferential additional stress of the surrounding rock is effectively reduced, thereby improving the stability of the surrounding rock of the underground gas storage under the same gas storage pressure load.

[0018] (2) The inner arch column shell lining structure makes full use of the elastic deformation of the inner arch column shell, the tangential extrusion thrust between the inner arch column shells, the annular constraint of the proximal surrounding rock and the steel-concrete outer lining, and the interaction between the bearing force transfer piles and the distal surrounding rock to dissipate the gas storage pressure load. Compared with the concrete lining structure of the same thickness, the inner arch column shell lining structure has a smaller internal pressure distribution coefficient.

[0019] (3) The annular sealing and telescopic device of the inner arch column shell composite lining structure (longitudinal) has three functions: connecting non-straight tunnels, eliminating axial temperature stress, and reducing axial vibration. Its functions include three aspects. First, the annular sealing and telescopic device is used to connect the inner arch column shells in the longitudinal direction to solve the problem of longitudinal connection of the cylindrical compressed air storage chamber in the non-straight tunnel; second, the annular sealing and telescopic device is used to release the longitudinal temperature deformation of the inner arch column shell, reduce the axial stress of the inner arch column shell in the extension direction of the chamber, and solve the problem of longitudinal deformation and temperature stress caused by temperature changes in the extension direction of the long extended cylindrical compressed air storage chamber; third, the annular sealing and telescopic device is used to reduce the axial vibration of the lining structure in the transient state of storage / release.

[0020] The beneficial effects of the present invention are: (a) solving the problem of large additional circumferential tensile deformation of the surrounding rock of large-diameter gas storage chambers. The cylindrical compressed air energy storage gas storage reservoir built on abandoned mines, tunnels, and caves has the characteristics of large diameter (more than 4 meters) and bearing high internal pressure cyclic gas storage loads. The concrete lining and proximal surrounding rock of the gas storage pressure chamber are subject to large cyclic gas storage pressure and produce large reciprocating circumferential deformation. By arranging an inner arch column shell structure on the inner wall of the gas storage chamber, the reciprocating deformation of the proximal surrounding rock caused by cyclic gas storage can be eliminated to a large extent, and the circumferential tensile stress borne by the proximal surrounding rock can be reduced.

[0021] (b) Solve the problem of longitudinal connection of cylindrical compressed air energy storage chambers in non-straight tunnels. Cylindrical compressed air energy storage gas storage built on abandoned mines, tunnels, and caves has the characteristic of being non-straight in the extension direction of its chamber. It is necessary to connect the compressed air energy storage chambers under the conditions of stress safety and sealing.

[0022] (c) Solve the problem of longitudinal deformation and temperature stress of long extended cylindrical compressed air energy storage chambers due to temperature changes in the extension direction. The inner arched column shell of each connected cylindrical compressed air energy storage chamber has a long extension length (greater than 6m) in the direction perpendicular to the chamber cross section. Under the influence of temperature changes caused by cyclic air storage, the inner arched column shell will cause certain temperature deformation (thermal expansion and contraction) and large temperature stress in the extension of the chamber, endangering the safety of the structure.

[0023] This inner arched column shell lining structure has the function of dissipating the high internal pressure cyclic gas storage load from four aspects: the arched column shell, the arch shell support force transfer pile, the mutual extrusion between the column shell supports, and the annular constraint of the steel-concrete outer lining; it can also realize the function of transferring a small part of the internal pressure of the gas storage to the surrounding rock. The annular sealing telescopic device can reduce the longitudinal temperature stress of the chamber and the longitudinal vibration of the lining structure caused by the high-pressure flowing gas during the filling / release process; it can also realize the segmentation and sealing connection of non-straight chambers.

[0024] The present invention utilizes the mechanical properties of an arch structure, a cylindrical shell, a stabilizing ring, and a telescopic device, and arranges a plurality of inner arched column shells with appropriate spans on the inner wall of an outer lining to convert the high internal pressure gas storage load into the axial pressure of the inner arched column shell, the compressive stress between the supports of the arched column shell, the distributed pressure of the outer lining, and the radial pressure of the distal surrounding rock. It has the advantages of reducing the annular deformation, annular stress, and axial (longitudinal) temperature stress of the outer lining and the proximal surrounding rock without significantly weakening the space utilization rate of the gas storage chamber, thereby improving the safety of the gas storage structure and the stability of the surrounding rock under the action of high internal pressure cyclic loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a cross-sectional layout diagram of the internal arch column shell composite lining gas storage structure of the present invention; Figure 2 It is a schematic diagram of the connection between the inner arch type column shell support and the column shell support extrusion connection device of the present invention; Figure 3 It is a three-dimensional schematic diagram of the arrangement of the inner arch column shell of the present invention; Figure 4 It is a schematic diagram of the span and rise of the single-piece inner arch column shell of the present invention; Figure 5 A three-dimensional diagram of an inner arched column shell arranged in an annular manner according to the present invention; Figure 6 It is a three-dimensional schematic diagram of the inner arched column shell segment and the inner arched column shell longitudinal connection of the present invention; Figure 7 This is a schematic diagram of the structure of the annular sealing telescopic device of the present invention; Figure 8 This is a structural diagram of the sealing and telescopic device of the present invention; Fig. 9 It is a longitudinal section layout diagram of the internal arch column shell composite lining gas storage structure of the present invention; Fig.10 It is a schematic diagram of the force transmission characteristics of the cross section of the inner arch column shell composite lining of the present invention; Fig.11 This is a schematic diagram of the structure of the column shell support extrusion connection device of the present invention; In the figure: 1, surrounding rock, 2, steel-concrete outer lining, 3, extrusion connection device between column shell supports, 3-1, outer shell, 3-2, elastic material, 3-3, middle support, 3-4, elastic steel plate, 4, inner arch column shell support, 5, inner arch column shell, 6, support force transmission pile, 7, inner arch column shell segment, 7-1, connecting end, 8, inner arch column shell longitudinal connection, 9, annular sealing telescopic device, 9-1, embedded connection device, 9-2, annular sleeve, 9-3, interlayer flexible elastic material. DETAILED DESCRIPTION

[0026] Embodiment 1, the present invention provides an arched column shell composite lining structure in a compressed air energy storage underground cavern, comprising a cross-sectional structure and a longitudinal section structure, wherein the cross-sectional structure is: from the outside to the inside of the cavern, it is composed of surrounding rock 1, a steel-concrete outer lining 2, an extrusion connection device 3 between column shell supports, an inner arched column shell support 4 and an inner arched column shell 5; a plurality of inner arched column shells are connected in sequence to form a closed air storage space.

[0027] The steel-concrete outer lining 2 is completely in contact with the surrounding rock 1; the column shell support extrusion connection device 3 is connected to the arc-shaped inner side of the steel-concrete outer lining 2 in a fixed connection manner.

[0028] The extrusion connection device 3 between the column shell supports is a double-chamber structure, connecting the adjacent inner arch column shell supports 4 on both sides, and is connected by welding near the center of the chamber to meet the gas sealing conditions.

[0029] The structure of the extrusion connection device 3 between the column shell supports is as follows: the cross-section of the double-chamber structure is an inverted I-shape, the upper and lower transverse parts are the outer shell 3-1, and the middle longitudinal part is, from the outside to the inside, an elastic steel plate 3-4, an elastic material 3-2, and a middle support 3-3, and the elastic steel plate 3-4 and the elastic material 3-2 are symmetrically arranged with the middle support 3-3 as the axis.

[0030] The inner arch column shell 5 is completely connected with the inner arch column shell supports 4 at both ends, and is formed by one-time pressing; and the sealing conditions are met; the protruding side of the inner arch column shell 5 is close to the center of the chamber; the axis of the inner arch column shell 5 in the cross section is an arc line, the span ratio is 0.4, the thickness is 0.01m, and the cross-sectional span is 0.40m; the material of the inner arch column shell 5 is aluminum alloy material, and the radius inside the chamber is 1.5m.

[0031] The inner layer material of the steel-concrete outer lining 2 is aluminum alloy, and its thickness is 2.5cm; the outer layer material of the steel-concrete outer lining 2 is reinforced concrete; the thickness of the steel-concrete outer lining 2 is 0.3m; the outer layer material of the steel-concrete outer lining 2 is capable of withstanding a tensile stress greater than 0.6MPa.

[0032] The longitudinal section structure is as follows: the inner arch column shell segment 7 is the basic component unit of the longitudinal composite lining structure; a plurality of inner arch column shell segments 7 are connected by direct welding or through an annular sealing telescopic device 9 to form an inner arch column shell longitudinal connection 8.

[0033] The length of each inner arch column shell segment 7 is set to 0.50m-36.00m according to the extension of the air storage chamber space.

[0034] The inner arched column shell segments 7 are connected by direct welding, and the column shell support extrusion connection device 3 is continuously arranged on each inner arched column shell segment 7 and the above-mentioned welding connection position.

[0035] The inner arched column shell segments 7 are connected to each other through an annular sealing telescopic device 9. At the portion connected to the annular sealing telescopic device 9, a 0.05m-0.1m connecting end 7-1 is provided at the end of the inner arched column shell segment 7. The connecting end 7-1 is not provided with an extrusion connecting device 3 between column shell supports and an inner arched column shell support 4. The connecting end 7-1 is embedded in the annular sealing telescopic device 9 and is connected in a matching manner by welding to meet the high-pressure gas sealing conditions.

[0036] The structure of the annular sealing telescopic device 9 is as follows: the external structure is an annular sleeve 9-2, and an embedded connecting device 9-1 is arranged inside. The embedded connecting device 9-1 is hollow inside, and the inner wall is arranged to be a plurality of arches, which are matched with the connecting end 7-1 of the inner arch column shell segment 7; an interlayer flexible elastic material 9-3 is arranged between the annular sleeve 9-2 and the embedded connecting device 9-1.

[0037] Embodiment 2, the present invention provides an arched column shell composite lining structure in an underground cavern for compressed air energy storage, comprising a cross-sectional structure and a longitudinal section structure, wherein the cross-sectional structure is: from the outside to the inside of the cavern, it is composed of surrounding rock 1, a steel-concrete outer lining 2, an extrusion connection device 3 between column shell supports, an inner arched column shell support 4 and an inner arched column shell 5; a plurality of inner arched column shells are connected in sequence to form a closed air storage space.

[0038] The steel-concrete outer lining 2 is completely in contact with the surrounding rock 1; the column shell support extrusion connection device 3 is connected to the arc-shaped inner side of the steel-concrete outer lining 2 in a fixed connection manner.

[0039] The extrusion connection device 3 between the column shell supports is a double-chamber structure, connecting the adjacent inner arch column shell supports 4 on both sides, and is connected by welding near the center of the chamber to meet the gas sealing conditions.

[0040] The inner arch column shell 5 is completely connected to the inner arch column shell supports 4 at both ends by welding, and meets the sealing conditions; the protruding side of the inner arch column shell 5 is close to the center of the chamber; the axis of the inner arch column shell 5 in the cross section is an arc line, the rise-span ratio is 0.35, the thickness is 0.1m, and the cross-sectional span is 1.2m; the material of the inner arch column shell 5 is structural steel material, and the radius inside the chamber is 4m.

[0041] The inner layer material of the steel-concrete outer lining 2 is steel, and its thickness is 5.0 cm; the outer layer material of the steel-concrete outer lining 2 is steel concrete; the thickness of the steel-concrete outer lining 2 is 1.0 m; the outer layer material of the steel-concrete outer lining 2 is capable of withstanding a tensile stress greater than 0.6 MPa.

[0042] The longitudinal section structure is as follows: the inner arch column shell segment 7 is the basic component unit of the longitudinal composite lining structure; a plurality of inner arch column shell segments 7 are connected by direct welding or through an annular sealing telescopic device 9 to form an inner arch column shell longitudinal connection 8.

[0043] The length of each inner arch column shell segment 7 is set to 5.00m-36.00m according to the extension of the air storage chamber space.

[0044] The inner arched column shell segments 7 are connected by direct welding, and the column shell support extrusion connection device 3 is continuously arranged on each inner arched column shell segment 7 and the above-mentioned welding connection position.

[0045] The inner arched column shell segments 7 are connected to each other through an annular sealing telescopic device 9. At the portion connected to the annular sealing telescopic device 9, a 0.2m connecting end 7-1 is provided at the end of the inner arched column shell segment 7. The connecting end 7-1 is not provided with an extrusion connecting device 3 between column shell supports and an inner arched column shell support 4. The connecting end 7-1 is embedded in the annular sealing telescopic device 9 and is connected in a matching manner by welding to meet the high-pressure gas sealing conditions.

[0046] The structure of the annular sealing telescopic device 9 is as follows: the external structure is an annular sleeve 9-2, and an embedded connecting device 9-1 is arranged inside. The embedded connecting device 9-1 is hollow inside, and the inner wall is arranged to be a plurality of arches, which are matched with the connecting end 7-1 of the inner arch column shell segment 7; an interlayer flexible elastic material 9-3 is arranged between the annular sleeve 9-2 and the embedded connecting device 9-1.

[0047] A vibration reduction and damping device may also be provided inside the annular sealing and telescopic device 9, and the vibration reduction and damping device is located between the two connection ends 7-1 in the embedded connection device 9-1.

[0048] Embodiment 3, the present invention provides an arched column shell composite lining structure in an underground cavern for compressed air energy storage, comprising a cross-sectional structure and a longitudinal section structure, wherein the cross-sectional structure is: from the outside to the inside of the cavern, it is composed of surrounding rock 1, a steel-concrete outer lining 2, an extrusion connection device 3 between column shell supports, an inner arched column shell support 4 and an inner arched column shell 5; a plurality of inner arched column shells are connected in sequence to form a closed air storage space.

[0049] The steel-concrete outer lining 2 is completely in contact with the surrounding rock 1; the column shell support extrusion connection device 3 is connected to the arc-shaped inner side of the steel-concrete outer lining 2 in a fixed connection manner.

[0050] The extrusion connection device 3 between the column shell supports is a double-chamber structure, connecting the adjacent inner arch column shell supports 4 on both sides, and is connected by welding near the center of the chamber to meet the gas sealing conditions.

[0051] The structure of the extrusion connection device 3 between the column shell supports is as follows: the cross-section of the double-chamber structure is an inverted I-shape, the upper and lower transverse parts are the outer shell 3-1, and the middle longitudinal part is, from the outside to the inside, an elastic steel plate 3-4, an elastic material 3-2, and a middle support 3-3, and the elastic steel plate 3-4 and the elastic material 3-2 are symmetrically arranged with the middle support 3-3 as the axis.

[0052] The inner arch column shell 5 is completely connected with the inner arch column shell supports 4 at both ends, adopts a one-time press molding method, and meets the sealing conditions; the protruding side of the inner arch column shell 5 is close to the center of the chamber; the axis of the inner arch column shell 5 in the cross section is an arc line, the span ratio is 0.45, the thickness is 0.03m, and the cross-sectional span is 0.6m; the material of the inner arch column shell 5 is structural steel, and the radius inside the chamber is 2.5m.

[0053] The inner layer material of the steel-concrete outer lining 2 is steel, and its thickness is 2.50cm; the outer layer material of the steel-concrete outer lining 2 is tough fiber concrete; the thickness of the steel-concrete outer lining 2 is 0.45m; the outer layer material of the steel-concrete outer lining 2 is capable of withstanding a tensile stress greater than 0.6MPa.

[0054] The longitudinal section structure is as follows: the inner arch column shell segment 7 is the basic component unit of the longitudinal composite lining structure; a plurality of inner arch column shell segments 7 are connected by direct welding or through an annular sealing telescopic device 9 to form an inner arch column shell longitudinal connection 8.

[0055] The length of each inner arch column shell segment 7 is set to 0.50m-36.00m according to the extension of the air storage chamber space.

[0056] The inner arched column shell segments 7 are connected by direct welding, and the column shell support extrusion connection device 3 is continuously arranged on each inner arched column shell segment 7 and the above-mentioned welding connection position.

[0057] The inner arched column shell segments 7 are connected to each other through an annular sealing telescopic device 9. At the portion connected to the annular sealing telescopic device 9, a 0.15m connecting end 7-1 is provided at the end of the inner arched column shell segment 7. The connecting end 7-1 is not provided with an extrusion connecting device 3 between column shell supports and an inner arched column shell support 4. The connecting end 7-1 is embedded in the annular sealing telescopic device 9 and is connected in a matching manner by welding to meet the high-pressure gas sealing conditions.

[0058] The structure of the annular sealing telescopic device 9 is as follows: the external structure is an annular sleeve 9-2, and an embedded connecting device 9-1 is arranged inside. The embedded connecting device 9-1 is hollow inside, and the inner wall is arranged to be a plurality of arches, which are matched with the connecting end 7-1 of the inner arch column shell segment 7; an interlayer flexible elastic material 9-3 is arranged between the annular sleeve 9-2 and the embedded connecting device 9-1.

[0059] A vibration reduction and damping device may also be provided inside the annular sealing and telescopic device 9, and the vibration reduction and damping device is located between the two connection ends 7-1 in the embedded connection device 9-1.

Claims

1. An arched column shell composite lining structure in a compressed air energy storage underground chamber, characterized in that: The invention comprises a cross-sectional structure and a longitudinal section structure. The cross-sectional structure is composed of surrounding rock (1), steel-concrete outer lining (2), an extrusion connection device between column shell supports (3), an inner arch column shell support (4) and an inner arch column shell (5) from the outside to the inside of the chamber; a plurality of inner arch column shells are connected in sequence to form a closed gas storage space.

2. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 1 is characterized in that: The steel-concrete outer lining (2) is completely contact-connected with the surrounding rock (1); and the column shell support inter-compression connection device (3) is connected to the arc-shaped inner side of the steel-concrete outer lining (2) in a fixed connection manner.

3. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 2 is characterized in that: The column shell support extrusion connection device (3) is a double-chamber structure, connecting the inner arch column shell supports (4) adjacent to each other on both sides, and is connected by welding near the center of the chamber to meet the gas sealing conditions.

4. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 3 is characterized in that: The inner arched column shell (5) is completely connected to the inner arched column shell supports (4) at both ends and meets the sealing condition; the protruding side of the inner arched column shell (5) is close to the center of the chamber; the axis of the inner arched column shell (5) in the cross section is an arc line, the rise-to-span ratio is 0.35-0.5, the thickness is 0.01m-0.10m, and the cross-sectional span is 0.40m-1.20m; the material of the inner arched column shell (5) is structural steel or aluminum alloy material.

5. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 4 is characterized in that: The inner layer material of the steel-concrete outer lining (2) is steel or aluminum material, and its thickness is 1.0 cm-5.0 cm; the outer layer material of the steel-concrete outer lining (2) is one of reinforced concrete, steel concrete, ductile fiber concrete, shotcrete, steel-concrete pipe segment, geopolymer concrete, and high-strength concrete; the thickness of the steel-concrete outer lining (2) is 0.3 m-1.2 m; the outer layer material of the steel-concrete outer lining (2) is capable of withstanding a tensile stress greater than 0.6 MPa.

6. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 5 is characterized in that: The longitudinal section structure is as follows: the inner arch column shell segment (7) is a basic component unit of the longitudinal composite lining structure; a plurality of inner arch column shell segments (7) are connected by direct welding or by means of an annular sealing telescopic device (9) to form an inner arch column shell longitudinal connection (8).

7. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 6 is characterized in that: The length of each inner arch column shell segment (7) is set to 0.50m-36.00m according to the extension of the gas storage chamber space.

8. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 7 is characterized in that: The inner arched column shell segments (7) are connected by direct welding, and the column shell support inter-extrusion connection device (3) is continuously arranged on each inner arched column shell segment (7) and the above-mentioned welding connection position.

9. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 7 is characterized in that: The inner arched column shell segments (7) are connected to each other via an annular sealing telescopic device (9). At the portion connected to the annular sealing telescopic device (9), a 0.05m-0.20m connecting end (7-1) is provided at the end of the inner arched column shell segment (7). The connecting end (7-1) is not provided with an inter-column shell support extrusion connecting device (3) and an inner arched column shell support (4). The connecting end (7-1) is embedded in the annular sealing telescopic device (9) and connected in a matching manner by welding, thereby meeting the high-pressure gas sealing conditions.

10. The arched column shell composite lining structure in the compressed air energy storage underground chamber according to claim 9, characterized in that: The structure of the annular sealing telescopic device (9) is as follows: the external structure is an annular sleeve (9-2), an embedded connecting device (9-1) is arranged inside, the embedded connecting device (9-1) is hollow inside, the inner wall is arranged in a plurality of groups of arches, and is matched with the connecting end (7-1) of the inner arch column shell segment (7); and an interlayer flexible elastic material (9-3) is arranged between the annular sleeve (9-2) and the embedded connecting device (9-1).

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