A compressed air energy storage chamber structure and construction method

Abstract

The application discloses a compressed air energy storage chamber structure and a construction method, and relates to the technical field of energy storage. The application comprises a concrete lining, a support beam, a rubber plug and a flexible sealing layer. The concrete lining is used to form an energy storage cavity, and is provided with lining joints and joints. The joints are located on the inner side of the lining joints and are in communication with the lining joints. The support beam is embedded in the lining joints and extends into the joints. The rubber plug is embedded in the joints and is in surface contact with the support beam, so that the support beam supports the rubber plug. The flexible sealing layer is arranged on the inner side of the concrete lining to seal the energy storage cavity. The circumferential tensile stress of the concrete lining is reduced through the lining joints, and the support beam in the lining joints supports the rubber plug in the radial direction. Thus, under the action of high internal pressure of the energy storage cavity, the flexible sealing layer will not be deformed due to the increase of the opening of the lining joints, and the structural stability of the flexible sealing layer and the long-term sealing property of the energy storage cavity are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a compressed air energy storage cavern structure and construction method. BACKGROUND

[0002] The compressed air energy storage power station is a new type of energy storage power station, which uses the excess power of the low load of the power system to store air in the underground cave, and releases it when needed, and generates electricity through the generator set after heating to meet the needs of peak load. The underground cave usually includes natural salt cave and artificial underground energy storage cavern, etc. The natural salt cave is limited by the resource conditions of salt cave, and this gas storage scheme has a bottleneck for promotion. The key consideration in the construction process of the artificial underground energy storage cavern is the sealing property.

[0003] At present, the energy storage cavern is usually sealed by a flexible sealing layer, and the internal pressure of the energy storage cavity is transmitted to the surrounding rock through the concrete lining. However, under the action of high internal pressure, the concrete lining expands outward and is prone to crack, causing the flexible sealing layer at the cracked lining to lose support. And the flexible sealing layer is squeezed into the crack and damaged and loses air tightness. SUMMARY

[0004] In view of the above problems, the present application is proposed in order to provide a compressed air energy storage cavern structure and construction method which overcomes the above problems or at least partially solves the above problems.

[0005] Based on the first aspect of the present application, a compressed air energy storage cavern structure is provided, which comprises:

[0006] a concrete lining, which forms an energy storage cavity, and is provided with a lining joint and a filled joint, wherein the filled joint is located on the inner side of the lining joint and communicates with the lining joint;

[0007] a support beam, which is embedded in the lining joint and extends into the filled joint;

[0008] a rubber plug, which is embedded in the filled joint and forms a surface contact with the support beam, so that the support beam supports the rubber plug;

[0009] a flexible sealing layer, which is arranged on the inner side of the concrete lining to seal the energy storage cavity.

[0010] An optional summary of the application, the lining joint is provided with at least six, and the at least six lining joints are distributed equiangularly around the center of the concrete lining.

[0011] An optional inventive content is that the support beam comprises a first support part, an extension part, and a second support part, the first support part and the second support part are respectively located at two ends of the extension part, and the second support part extends into the filling gap.

[0012] An optional inventive content is that the first support part and the second support part are arranged in parallel.

[0013] An optional inventive content is that the first support part, the extension part, and the second support part are of an integrated structure.

[0014] An optional inventive content is that the first support part, the extension part, and the second support part are respectively made of steel material.

[0015] An optional inventive content is that the compressed air energy storage chamber structure further comprises at least two connecting members, and the rubber plug is fixedly connected with the concrete lining through the connecting members.

[0016] An optional inventive content is that the at least two connecting members are distributed on two sides of the support beam arranged in the circumferential direction, and the rubber plug is fixedly connected with the concrete lining located on the two sides of the support beam.

[0017] An optional inventive content is that the circumferential cross-sectional shape of the filling gap is rectangular.

[0018] An optional inventive content is that the circumferential cross-sectional shape of the filling gap is stepped.

[0019] An optional inventive content is that the flexible sealing layer is adhesively fixed with the inner side of the concrete lining.

[0020] An optional inventive content is that the compressed air energy storage chamber structure further comprises a grouting layer, and the grouting layer is arranged between the concrete lining and the surrounding rock.

[0021] An optional inventive content is that the compressed air energy storage chamber structure further comprises an anchor rod, and the anchor rod is embedded in the surrounding rock and extends into the grouting layer.

[0022] Based on the second aspect of the present application, a construction method of a compressed air energy storage chamber structure is also provided, and the construction method comprises:

[0023] Positioning the circumferentially distributed lining joint on the inner side of the grouting layer;

[0024] Providing a support beam and fixing the support beam at the lining joint;

[0025] Installing a lining formwork and forming a filling gap communicating with the lining joint at the lining joint, wherein the filling gap is located on the inner side of the lining joint, and the support beam extends into the filling gap.

[0026] Pouring concrete into the lining formwork to form a concrete lining and to form an energy storage cavity by the concrete lining;

[0027] Providing a rubber plug, embedding the rubber plug in the gap, and forming surface contact with the support beam, so that the support beam supports the rubber plug;

[0028] Providing a flexible sealing layer on the inner side of the concrete lining to seal the energy storage cavity by the flexible sealing layer.

[0029] An optional summary of the application, the lining gap is positioned on the inner side of the grouting layer, comprising:

[0030] Positioning at least six lining gaps on the inner side of the grouting layer, and the at least six lining gaps are distributed equiangularly around the center of the grouting layer.

[0031] An optional summary of the application, the rubber plug is embedded in the gap, comprising:

[0032] Providing at least two connecting members, the rubber plug is embedded in the gap by the at least two connecting members, and is fixedly connected with the concrete lining.

[0033] Compared with the prior art, the present application comprises a concrete lining, a support beam, a rubber plug and a flexible sealing layer. The concrete lining forms an energy storage cavity and is provided with lining gaps and gaps. The gap is located on the inner side of the lining gap and communicates with the lining gap. The support beam is embedded in the lining gap and extends into the gap. The rubber plug is embedded in the gap and forms surface contact with the support beam, so that the support beam supports the rubber plug. The flexible sealing layer is provided on the inner side of the concrete lining to seal the energy storage cavity. The circumferential tensile stress of the concrete lining is reduced by the lining gap, and the rubber plug is supported in the radial direction by the support beam in the lining gap. Therefore, under the action of high internal pressure of the energy storage cavity, the flexible sealing layer will not be deformed due to the opening of the lining gap, and the structural stability of the flexible sealing layer and the long-term sealing property of the energy storage cavity are ensured.

[0034] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the following specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present application thereto. Like reference numerals have been used throughout the drawings to denote like parts.

[0036] In the drawings:

[0037] Figure 1 is a structural schematic diagram of a compressed air energy storage cavern structure provided by an embodiment of the present application;

[0038] Figure 2 is a structural schematic diagram of a lining joint provided by an embodiment of the present application;

[0039] Figure 3 is a partial structural schematic diagram of a compressed air energy storage cavern structure provided by an embodiment of the present application;

[0040] Figure 4 is a structural schematic diagram of another compressed air energy storage cavern structure provided by an embodiment of the present application;

[0041] Figure 5 is a step flow schematic diagram of a construction method of a compressed air energy storage cavern structure provided by an embodiment of the present application;

[0042] Reference signs: 1, concrete lining; 101, lining joint; 102, joint filling; 103, energy storage cavity; 2, support beam; 21, first support part; 22, extension part; 23, second support part; 3, rubber plug; 4, flexible sealing layer; 5, connecting piece; 6, anchor rod; 7, grouting layer; 8, surrounding rock. DETAILED DESCRIPTION

[0043] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0044] A compressed air energy storage power station is a new type of energy storage power station, which uses excess power during low load of a power system to compress and store air in an underground cave, and releases the air when needed, heats it, and then generates electricity through a generator set to meet the needs of peak load. The underground cave usually includes natural salt caves and artificial underground energy storage caverns, etc. The natural salt cave is limited by the resource conditions of the salt cave, and this gas storage scheme has a bottleneck for promotion. The key consideration in the construction process of the artificial underground energy storage cavern is the sealing property.

[0045] At present, the energy storage chamber is usually sealed by a flexible sealing layer, and the internal pressure of the energy storage cavity is transmitted to the surrounding rock through the concrete lining. However, under the action of high internal pressure, the concrete lining expands outward and is prone to cracking, which causes the flexible sealing layer to lose support at the cracked lining. And the flexible sealing layer enters the crack and is damaged and loses air tightness.

[0046] Based on the above technical problems, the present application embodiment is proposed, which comprises a concrete lining 1, a support beam 2, a rubber plug 3 and a flexible sealing layer 4. The concrete lining 1 forms an energy storage cavity 103, and is provided with a lining joint 101 and a joint 102. The joint 102 is located inside the lining joint 101 and communicates with the lining joint 101. The support beam 2 is embedded in the lining joint 101 and extends into the joint 102. The rubber plug 3 is embedded in the joint 102 and forms a surface contact with the support beam 2, so that the support beam 2 supports the rubber plug 3. The flexible sealing layer 4 is arranged on the inside of the concrete lining 1 to seal the energy storage cavity 103. The circumferential tensile stress of the concrete lining 1 is reduced through the lining joint 101, and the support beam 2 in the lining joint 101 supports the rubber plug 3 in the radial direction. Thus, under the action of high internal pressure of the energy storage cavity 103, the flexible sealing layer 4 will not be deformed due to the opening of the lining joint 101, and the structural stability of the flexible sealing layer 4 and the long-term sealing of the energy storage cavity 103 are ensured.

[0047] The present application embodiment can realize the cracking control of the concrete lining 1. The flexible sealing layer 4 is made of high molecular material or flexible concrete, and does not have the ability to resist external water pressure. The present application embodiment can avoid the formation of seepage channel of external water infiltration due to lining cracking, and the problems of bulging of the flexible sealing layer 4 to the inside. At the same time, it can avoid the problem of too large crack width caused by lining cracking, which causes the flexible sealing layer 4 to be extruded into the crack and lose air tightness. Thus, the long-term sealing property of the sealing is improved.

[0048] Reference Figures 1-4 The present application embodiment provides a compressed air energy storage chamber structure, which can comprise a concrete lining 1, a support beam 2, a rubber plug 3 and a flexible sealing layer 4, wherein:

[0049] The concrete lining 1 forms the energy storage cavity 103, and is provided with lining separation joints 101 and filling joints 102. The filling joints 102 are located inside the lining separation joints 101 and communicate with the lining separation joints 101. The support beams 2 are embedded in the lining separation joints 101 and extend into the filling joints 102. The rubber plugs 3 are embedded in the filling joints 102 and are in surface contact with the support beams 2, so that the support beams 2 support the rubber plugs 3. The flexible sealing layer 4 is arranged on the inner side of the concrete lining 1 to seal the energy storage cavity 103.

[0050] In the embodiments of the present application, the chamber structure can include a concrete lining 1, a support beam 2, a rubber plug 3, and a flexible sealing layer 4. The concrete lining 1 refers to a support structure formed by pouring concrete material, through which an annular energy storage cavity 103 is formed. In some embodiments, the annular cross-sectional shape of the energy storage cavity 103 formed by the concrete lining 1 can include, but is not limited to, a circular shape, an elliptical shape, a rectangular shape, and the like, which are not limited herein.

[0051] The concrete lining 1 is provided with lining separation joints 101 and filling joints 102. The filling joints 102 are located inside the lining separation joints 101 and communicate with the lining separation joints 101. The lining separation joints 101 and the filling joints 102 cooperate, in other words, the space formed by the combination of the lining separation joints 101 and the filling joints 102 completely penetrates the concrete lining 1 in the thickness direction of the concrete lining 1, thereby dividing the concrete lining 1 in the annular direction. Thus, under the action of high internal pressure of the energy storage cavity 103, a deformation space of the concrete lining 1 can be reserved, and the rupture of the lining caused by annular tensile stress of the concrete lining 1 can be avoided.

[0052] The support beams 2 are embedded in the lining separation joints 101 and extend into the filling joints 102. The arrangement of the support beams 2 in the lining separation joints 101 can reduce the annular tensile stress of the concrete lining 1. The support beams 2 extending into the filling joints 102 are in surface contact with the rubber plugs 3 embedded in the filling joints 102. Thus, the support beams 2 can support the rubber plugs 3 in the thickness direction of the concrete lining 1. Since the support beams 2 are located outside the rubber plugs 3, under the action of high pressure of the energy storage cavity 103, when the rubber plugs 3 deform in the direction close to the support beams 2 (i.e., in the direction outside the energy storage cavity 103), the rubber plugs 3 will not deform and empty into the lining separation joints 101 or the filling joints 102 under the action of the support beams 2. Thus, the flexible sealing layer 4 arranged inside the rubber plugs 3 and inside the concrete lining 1 will not lose its sealing performance due to the loss of structural support. Therefore, the structural stability of the flexible sealing layer 4 and the long-term sealing performance of the energy storage cavity 103 are ensured.

[0053] Further, considering that the rubber plug 3 and the flexible sealing layer 4 have a risk of failure in long-term use under the action of long-term alternating load. In the embodiment of the present application, when the flexible sealing layer 4 or the rubber plug 3 ages, the flexible sealing layer 4 on the surface construction (such as bonding with the inner side of the concrete lining 1) can be removed, and the rubber plug 3 in the filling joint 102 can be removed, and a new rubber plug 3 and a new flexible sealing layer 4 can be installed. Thus, the embodiment of the present application also has the advantages of facilitating later maintenance and replacement.

[0054] In an alternative embodiment of the present application, the compressed air energy storage chamber structure can include a concrete lining 1, a support beam 2, a rubber plug 3, and a flexible sealing layer 4, wherein:

[0055] The concrete lining 1 forms an energy storage cavity 103, and at least six lining joints 101 and at least six filling joints 102 are formed. The at least six lining joints 101 are distributed at equal angles around the center of the concrete lining 1, and the filling joints 102 are located on the inner side of the lining joints 101 and communicate with the lining joints 101. The support beam 2 is embedded in the lining joints 101 and extends into the filling joints 102. The rubber plug 3 is embedded in the filling joint 102 and forms a surface contact with the support beam 2, so that the support beam 2 supports the rubber plug 3. The flexible sealing layer 4 is arranged on the inner side of the concrete lining 1 to seal the energy storage cavity 103.

[0056] In the embodiment of the present application, the chamber structure can include a concrete lining 1, a support beam 2, a rubber plug 3, and a flexible sealing layer 4. The concrete lining 1 refers to a support structure formed by pouring concrete material, and an energy storage cavity 103 is formed by surrounding it in a ring shape. In some embodiments, the energy storage cavity 103 formed by the concrete lining 1 can have a circular cross-sectional shape in the ring direction.

[0057] The concrete lining 1 is provided with lining joints 101 and filling joints 102. The filling joints 102 are located on the inner side of the lining joints 101 and communicate with the lining joints 101. The lining joints 101 and the filling joints 102 cooperate, in other words, the space formed by the combination of the lining joints 101 and the filling joints 102 completely penetrates the concrete lining 1 in the thickness direction of the concrete lining 1, thereby dividing the concrete lining 1 in the ring direction. Thus, under the action of high internal pressure of the energy storage cavity 103, a deformation space of the concrete lining 1 can be reserved, and the risk of lining rupture caused by ring tension stress of the concrete lining 1 can be avoided.

[0058] The support beam 2 is embedded in the lining joint 101 and extends into the filling joint 102. The support beam 2 arranged in the lining joint 101 can reduce the circumferential tensile stress of the concrete lining 1. The support beam 2 extending into the filling joint 102 forms a surface contact with the rubber plug 3 embedded in the filling joint 102. Thus, the support beam 2 can support the rubber plug 3 along the thickness direction of the concrete lining 1. Since the support beam 2 is located outside the rubber plug 3, when the rubber plug 3 is deformed under the pressure of the energy storage cavity 103, the rubber plug 3 will not be deformed and empty into the lining joint 101 or the filling joint 102 under the action of the support beam 2. Thus, the flexible sealing layer 4 arranged inside the rubber plug 3 and the concrete lining 1 will not lose its structural support and sealing performance. Thus, the structural stability of the flexible sealing layer 4 and the long-term sealing performance of the energy storage cavity 103 are ensured.

[0059] In the embodiment of the present application, the number of the lining joints 101 and the number of the filling joints 102 are the same. The lining joints 101 are arranged at least six. Correspondingly, the filling joints 102 are arranged at least six. At least six of the lining joints 101 are distributed at equal angles around the center of the concrete lining 1. That is, the included angle a between two adjacent lining joints 101 and the center of the concrete lining 1 is equal to or less than 60°.

[0060] Referring to Figure 1 The lining joints 101 can be arranged six, and the six lining joints 101 are distributed at equal angles around the center of the concrete lining 1. That is, the included angle a is 60°. On the one hand, the equal angle distribution can facilitate the positioning of the lining joints 101 during the construction of the concrete lining 1. On the other hand, the equal angle distribution can facilitate the uniformity of the lining formwork and reduce the construction cost of the concrete lining 1.

[0061] In other embodiments, referring to Figure 4 The lining joints 101 can be arranged eight, and the eight lining joints 101 are distributed at equal angles around the center of the concrete lining 1. That is, the included angle a is 45°. The skilled person can determine the specific number of lining joints 101 according to the actual design requirements, which is not limited herein.

[0062] An optional embodiment of the present application, the support beam 2 includes a first support portion 21, an extension portion 22, and a second support portion 23. The first support portion 21 and the second support portion 23 are located at two ends of the extension portion 22, respectively. The second support portion 23 extends into the filling joint 102.

[0063] In the embodiment of the present application, the support beam 2 can further include a first support part 21, an extension part 22 and a second support part 23. The first support part 21 and the second support part 23 are respectively located at two ends of the extension part 22, that is, the first support part 21 is fixedly connected with one end of the extension part 22, and the second support part 23 is fixedly connected with the other end of the extension part 22. In the process of assembling and constructing the support beam 2, the first support part 21 is used to contact the grouting layer 7 to realize the construction positioning of the support beam 2 at the lining joint 101. The second support part 23 extends into the joint 102 to form a surface contact with the rubber plug 3. Thus, in the case that the width of the lining joint 101 changes, the rubber plug 3 will not be deformed and enter the lining joint 101. The second support part 23 provides structural support for the rubber plug 3.

[0064] In an optional embodiment of the present application, the first support part 21 and the second support part 23 are arranged in parallel.

[0065] In the embodiment of the present application, as shown in Figure 2 , the first support part 21 and the second support part 23 are arranged in parallel, so that the first support part 21, the extension part 22 and the second support part 23 can form a H-shaped structure. In a preferred embodiment, the first support part 21, the extension part 22 and the second support part 23 can be an integrated structure. For example, a H-shaped metal material (preferably steel material) can be used as the support beam 2, so as to reduce the construction cost of the chamber structure and ensure the support strength of the support beam 2.

[0066] In an optional embodiment of the present application, as shown in Figure 2 and Figure 3 , the compressed air energy storage chamber structure further includes at least two connecting members 5, and the rubber plug 3 is fixedly connected with the concrete lining 1 through the connecting members 5.

[0067] In the embodiment of the present application, the connecting member 5 is used to fix the rubber plug 3 on the concrete lining 1. The connecting member 5 can include connecting bolts and other components. Under the fixing action of the connecting member 5, the connecting rigidity between the rubber plug 3 and the concrete lining 1 is low. Under the high pressure of the energy storage cavity 103, the rubber plug 3 can adapt to the change of the lining joint 101 on the concrete lining 1, that is, the rubber plug 3 deforms with the change of the width of the lining joint 101 in the circumferential direction, and will not generate excessive force on the circumferential deformation of the lining joint 101, so as to avoid the destruction of the area on the concrete lining 1 connected with the rubber plug 3.

[0068] In the embodiment of the present application, the number of the connecting members 5 can be determined according to the length of the rubber plug 3, or according to the length and width of the rubber plug 3, for example, the connecting members 5 can be 2, 4, 8, 12, 16, etc., which are not limited here.

[0069] As a preferred embodiment of the present application, at least two connecting members 5 are distributed on both sides of the support beam 2 arranged in the circumferential direction, and the rubber plug 3 is fixed with the concrete lining 1 located on both sides of the support beam 2.

[0070] In the embodiment of the present application, referring to Figure 3 As shown in the figure, taking the circumferential direction of the concrete lining 1 as the reference direction, at least two connecting members 5 are distributed on both sides of the support beam 2, which can be understood that part of the connecting members 5 are located on one side of the support beam 2 arranged in the circumferential direction, and the other part of the connecting members 5 are located on the other side of the support beam 2 arranged in the circumferential direction. Thus, when the rubber plug 3 is embedded in the gap 102, the connecting members 5 fix the rubber plug 3 with the concrete lining 1 located on both sides of the support beam 2. On the one hand, the connecting members 5 are located on both sides of the support beam 2, which can improve the connection firmness of the rubber plug 3 and the concrete lining 1. On the other hand, the support beam 2 is located in the connection area of the rubber plug 3 and the concrete lining 1, which can improve the contact area between the rubber plug 3 and the support beam 2, and improve the structural support strength of the support beam 2 to the rubber plug 3 in the thickness direction.

[0071] An optional embodiment of the present application is that the circumferential cross-sectional shape of the gap 102 is rectangular.

[0072] In the embodiment of the present application, the circumferential cross-sectional shape of the gap 102 is rectangular, which can facilitate the construction of the gap 102 and effectively reduce the production materials of the rubber plug 3, which can be beneficial to reduce the construction cost.

[0073] An optional embodiment of the present application is that the circumferential cross-sectional shape of the gap 102 is rectangular. Figure 2

[0074] ​In the embodiment of the present application, the annular cross-sectional shape of the joint filling 102 is a stepped shape, which can further increase the contact area between the rubber plug 3 and the concrete lining 1. Thus, under the action of the high pressure of the energy storage cavity 103, the rubber plug 3 can be deformed in the annular direction while being in sufficient contact with the concrete lining 1, and the annular force is dispersed by the large contact area. Thus, the radial transmission of the internal pressure load on the chamber structure can be facilitated, the area of the concrete lining 1 connected with the rubber plug 3 is prevented from being damaged, and the structural stability of the concrete lining 1 is improved.

[0075] In the embodiment of the present application, the annular cross-sectional shape of the joint filling 102 can be a 2-step shape or an N-step shape, where N is greater than 2. Those skilled in the art can determine the corresponding step number according to actual design requirements, which is not limited herein.

[0076] An optional content of the present application is shown in Figure 1 and Figure 4 The compressed air energy storage chamber structure further comprises a grouting layer 7, which is arranged between the concrete lining 1 and the surrounding rock 8.

[0077] In the embodiment of the present application, the grouting layer 7 is arranged between the concrete lining 1 and the surrounding rock 8. The grouting layer 7 can be a structure obtained by arranging a grouting formwork on the outer periphery of the surrounding rock 8 and performing grouting treatment. The material used in the grouting layer 7 can be cement or the like. The grouting layer 7 can be used to reinforce the surrounding rock 8, improve the modulus and structural integrity of the surrounding rock, and achieve the effect of water plugging, form a water stop belt with a certain thickness, and fill the cracks of the surrounding rock 8, thereby facilitating the construction of the concrete lining 1 in the later stage. The surrounding rock 8 can refer to the rock around the energy storage cavity 103.

[0078] An optional content of the present application is shown in Figure 1 and Figure 4 The compressed air energy storage chamber structure further comprises an anchor rod 6, which is embedded in the surrounding rock 8 and extends into the grouting layer 7.

[0079] In the embodiment of the present application, the anchor rod 6 is used to reinforce the surrounding rock 8, for example, to connect the cracks and broken surfaces in the surrounding rock 8. Thus, the structural firmness of the chamber structure as a whole can be improved. Furthermore, the anchor rod 6 extending into the grouting layer 7 can form a structural support for the surrounding rock 8 through the support of the grouting layer 7, further reducing the deformation of the surrounding rock 8.

[0080] In summary, the embodiment of the present application discloses a compressed air energy storage chamber structure, which can include a concrete lining 1, a support beam 2, a rubber plug 3 and a flexible sealing layer 4. The concrete lining 1 forms an energy storage cavity 103, and is provided with a lining joint 101 and a filling joint 102. The filling joint 102 is located inside the lining joint 101 and communicates with the lining joint 101. The support beam 2 is embedded in the lining joint 101 and extends into the filling joint 102. The rubber plug 3 is embedded in the filling joint 102 and forms a surface contact with the support beam 2, so that the support beam 2 supports the rubber plug 3. The flexible sealing layer 4 is arranged on the inner side of the concrete lining 1 to seal the energy storage cavity 103. The circumferential tensile stress of the concrete lining 1 is reduced through the lining joint 101, and the support beam 2 in the lining joint 101 supports the rubber plug 3 in the radial direction. Thus, under the action of high internal pressure of the energy storage cavity 103, the flexible sealing layer 4 will not be deformed due to the opening of the lining joint 101, and the structural stability of the flexible sealing layer 4 and the long-term sealing property of the energy storage cavity 103 are ensured.

[0081] Referring to Figure 5 The embodiment of the present application discloses a construction method of a compressed air energy storage chamber structure, which can include:

[0082] S501, positioning a lining joint 101 on the inner side of the grouting layer 7.

[0083] S502, providing a support beam 2 and fixing the support beam 2 at the lining joint 101.

[0084] In the embodiment of the present application, the grouting layer 7 is arranged between the concrete lining 1 and the surrounding rock 8. The grouting layer 7 can be a structure obtained by setting a grouting formwork on the outer periphery of the surrounding rock 8 and performing grouting treatment. The material used in the grouting layer 7 can be cement and the like. The grouting layer 7 can consolidate the surrounding rock 8 and achieve a water plugging effect, forming a water stop belt with a certain thickness to plug the cracks of the surrounding rock 8, thereby facilitating the construction of the concrete lining 1 in the later stage. The surrounding rock 8 can refer to the rock around the energy storage cavity 103.

[0085] When the position of the lining joint 101 is determined, the engineering surveying instrument can determine the circumferential center of the current grouting layer 7, and determine the position of the lining joint 101 according to the number of construction strips of the lining joint 101 (at least six strips) and the circumferential center of the grouting layer 7 (which can also be referred to as the circumferential center of the concrete lining 1) at an equal angle. The support beam 2 is embedded in the lining joint 101 to reduce the circumferential tensile stress of the concrete lining 1. The support beam 2 can be abutted to the inner side of the grouting layer 7 (the side of the grouting layer 7 close to the circumferential center) by means of a tool, thereby forming the fixation of the support beam 2.

[0086] S503, install a lining formwork and form a joint filling 102 in communication with the lining joint 101 at the lining joint 101, wherein the joint filling 102 is located on the inner side of the lining joint 101, and the support beam 2 extends into the joint filling 102.

[0087] S504, pouring concrete in the lining formwork to form a concrete lining 1, and forming an energy storage cavity 103 by surrounding the concrete lining 1.

[0088] In the embodiment of the present application, the lining formwork is used to form a pouring cavity, so that the concrete lining 1 is formed by pouring concrete into the pouring cavity. Moreover, the lining joint 101 and the joint filling 102 in communication with the lining joint 101 are reserved by the design of the lining formwork. The lining formwork can form pressure contact with both sides of the support beam 2.

[0089] S505, providing a rubber plug 3, embedding the rubber plug 3 in the joint filling 102, and forming surface contact with the support beam 2, so that the support beam 2 supports the rubber plug 3.

[0090] S506, providing a flexible sealing layer 4 on the inner side of the concrete lining 1 to seal the energy storage cavity 103 by the flexible sealing layer 4.

[0091] In the embodiment of the present application, the rubber plug 3 can be prefabricated and embedded in the joint 102 with a gap. The support beam 2 is in surface contact with the rubber plug 3. The support beam 2 can support the rubber plug 3 along the thickness direction of the concrete lining 1. Since the support beam 2 is located outside the rubber plug 3, the rubber plug 3 will not be deformed and fall into the lining joint 101 or the joint 102 under the action of high pressure of the energy storage cavity 103. The flexible sealing layer 4 can be constructed on the inner side of the concrete lining 1, for example, the flexible sealing layer 4 can be bonded. The flexible sealing layer 4 is supported by the rubber plug 3 at the joint 102. The rubber plug 3 can also seal the lining joint 101 of the concrete lining 1, so as to avoid the problem of water infiltration from the outside to the inside due to the increase in the width of the lining joint 101. At the same time, the problem of air leakage due to the extrusion of the flexible sealing layer 4 into the crack or the damage of the flexible sealing layer 4 caused by the crack with too large width can be avoided. Therefore, the long-term sealing performance of the sealing structure is improved.

[0092] Further, considering that the rubber plug 3 and the flexible sealing layer 4 have a risk of failure under long-term alternating load, when the flexible sealing layer 4 or the rubber plug 3 is aged, the surface flexible sealing layer 4 can be removed, the rubber plug 3 in the joint 102 can be removed, and a new rubber plug 3 and a new flexible sealing layer 4 can be installed. Therefore, the embodiment of the present application also has the advantages of convenient maintenance and replacement.

[0093] In summary, the embodiment of the present application discloses a construction method of a compressed air energy storage chamber structure, which can include first positioning a lining joint 101 on the inner side of a grouting layer 7, then providing a support beam 2 and fixing the support beam 2 at the lining joint 101. Then a lining formwork is installed, and a joint filling 102 is formed at the lining joint 101 and communicates with the lining joint 101, wherein the joint filling 102 is located on the inner side of the lining joint 101, and the support beam 2 extends into the joint filling 102. Then concrete is poured into the lining formwork to form a concrete lining 1, and an energy storage cavity 103 is formed by surrounding the concrete lining 1. Finally, a rubber plug 3 is provided and embedded in the joint filling 102 and in surface contact with the support beam 2, so that the support beam 2 supports the rubber plug 3. A flexible sealing layer 4 is arranged on the inner side of the concrete lining 1 to seal the energy storage cavity 103 through the flexible sealing layer 4. The circumferential tensile stress of the concrete lining 1 is reduced through the lining joint 101, and the support beam 2 in the lining joint 101 supports the rubber plug 3 in the radial direction. Thus, under the action of high internal pressure of the energy storage cavity 103, the flexible sealing layer 4 will not be deformed due to the opening of the lining joint 101, and the structural stability of the flexible sealing layer 4 and the long-term sealing property of the energy storage cavity 103 are ensured.

[0094] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between embodiments can be referred to each other.

[0095] It is easy for those skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an embodiment of the present application, but due to the limitation of the length, the specification will not be described in detail here.

[0096] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the specification.

[0097] Similarly, it should be understood that, in order to simplify the present application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof.

[0098] Furthermore, those skilled in the art will recognize that, while certain embodiments described herein include certain features that are not included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments, for example, in the claims. For example, in the claims, any of the claimed embodiments can be used in any combination.

Claims

1. A compressed air energy storage chamber structure, characterized in that, The compressed air energy storage chamber structure includes: A concrete lining (1) is provided to form an energy storage cavity (103), and a lining joint (101) and a filler (102) are provided. The filler (102) is located inside the lining joint (101) and communicates with the lining joint (101). A support beam (2) is embedded in the lining joint (101) and extends into the filler (102); A rubber plug (3) is embedded in the slurry (102) and forms a surface contact with the support beam (2) so that the support beam (2) supports the rubber plug (3); A flexible sealing layer (4) is disposed on the inner side of the concrete lining (1) to seal the energy storage cavity (103); The support beam (2) includes a first support portion (21), an extension portion (22) and a second support portion (23), wherein the first support portion (21) and the second support portion (23) are located at both ends of the extension portion (22), and the second support portion (23) extends into the sealant (102).

2. The compressed air energy storage chamber structure according to claim 1, characterized in that, At least six lining joints (101) are provided, and at least six lining joints (101) are distributed at equal angles around the center of the concrete lining (1).

3. The compressed air energy storage chamber structure according to claim 1, characterized in that, The first support part (21) and the second support part (23) are arranged in parallel.

4. The compressed air energy storage chamber structure according to claim 1, characterized in that, The first support part (21), the extension part (22) and the second support part (23) are an integral structure.

5. The compressed air energy storage chamber structure according to claim 1, characterized in that, The first support part (21), the extension part (22) and the second support part (23) are made of steel.

6. The compressed air energy storage chamber structure according to claim 1, characterized in that, The compressed air energy storage chamber structure also includes at least two connectors (5), and the rubber plug (3) is fixedly connected to the concrete lining (1) through the connectors (5).

7. The compressed air energy storage chamber structure according to claim 6, characterized in that, At least two connectors (5) are distributed on both sides of the support beam (2) along the circumferential direction, and the rubber plug (3) is fixed to the concrete lining (1) located on both sides of the support beam (2).

8. The compressed air energy storage chamber structure according to claim 6, characterized in that, The circumferential cross-sectional shape of the sealant (102) is rectangular.

9. The compressed air energy storage chamber structure according to claim 6, characterized in that, The circumferential cross-sectional shape of the sealant (102) is stepped.

10. The compressed air energy storage chamber structure according to claim 1, characterized in that, The flexible sealing layer (4) is bonded and fixed to the inner side of the concrete lining (1).

11. The compressed air energy storage chamber structure according to claim 1, characterized in that, The compressed air energy storage chamber structure also includes a grouting layer (7), which is disposed between the concrete lining (1) and the surrounding rock (8).

12. The compressed air energy storage chamber structure according to claim 11, characterized in that, The compressed air energy storage chamber structure also includes anchor bolts (6), which are embedded in the surrounding rock (8) and extend into the grouting layer (7).

13. A construction method for a compressed air energy storage chamber structure, characterized in that, The construction method includes: On the inner side of the grouting layer (7), the lining joint (101) is located; Provide a support beam (2) and fix the support beam (2) at the lining joint (101); Install the lining template and form a filler (102) at the lining joint (101) that communicates with the lining joint (101), wherein the filler (102) is located inside the lining joint (101) and the support beam (2) extends into the filler (102). Concrete is poured into the lining template to form a concrete lining (1), and an energy storage cavity (103) is formed by enclosing the concrete lining (1). A rubber plug (3) is provided, which is embedded in the slurry (102) and forms a surface contact with the support beam (2) so that the support beam (2) supports the rubber plug (3); A flexible sealing layer (4) is provided on the inner side of the concrete lining (1) to form a seal on the energy storage cavity (103) through the flexible sealing layer (4); The support beam (2) includes a first support portion (21), an extension portion (22) and a second support portion (23), wherein the first support portion (21) and the second support portion (23) are located at both ends of the extension portion (22), and the second support portion (23) extends into the sealant (102).

14. The construction method of the compressed air energy storage chamber structure according to claim 13, characterized in that, The method of locating the lining joint (101) on the inner side of the grouting layer (7) includes: On the inner side of the grouting layer (7), at least six lining joints (101) are located, and the at least six lining joints (101) are distributed at equal angles around the center of the grouting layer (7).

15. The construction method of the compressed air energy storage chamber structure according to claim 13, characterized in that, The step of embedding the rubber stopper (3) into the sealant (102) includes: At least two connectors (5) are provided, and the rubber plug (3) is embedded in the grout (102) and fixedly connected to the concrete lining (1) by the at least two connectors (5).

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