Secondary lining structure design method, device and equipment for gas storage and medium

Abstract

The invention provides a secondary lining structure design method, device and equipment for a gas storage and a medium, and relates to the technical field of secondary lining structures, the design method comprises the following steps: acquiring parameter data, surrounding rock data, high-pressure air load data and external water data of the gas storage; constructing a basic model; performing construction simulation according to the basic model to obtain a first thickness of the second lining structure; performing operation period simulation according to the basic model and the high-pressure air load data, and calculating to obtain a second thickness of the secondary lining structure; performing maintenance period simulation calculation according to the basic model and the external water data to obtain a third thickness of the second lining structure; and recording the maximum value of the extracted first thickness, second thickness and third thickness as the minimum thickness of the second lining structure. Through staged simulation and comprehensive consideration of various loads and defect conditions, the accurate minimum thickness of the secondary lining structure is obtained, and a reliable basis is provided for thickness design of the secondary lining structure.

Description

Technical Field

[0001] This invention relates to the field of secondary lining structure technology, and more specifically, to a design method, apparatus, equipment, and medium for secondary lining structures used in gas storage facilities. Background Technology

[0002] With the continuous growth of energy demand, gas storage facilities, as important energy reserve facilities, are being constructed on an increasingly larger scale and in greater numbers. Gas storage facilities are typically built underground, and their structural safety directly affects the stability of energy storage and the safety of the surrounding environment. The secondary lining structure, as a key component of the gas storage facility, plays a crucial role in resisting various loads such as surrounding rock pressure, groundwater pressure, and gas storage pressure. In existing technologies, to ensure the stability of the secondary lining structure, the common method is to simply increase its thickness; however, the thickness of the secondary lining structure lacks design justification. Summary of the Invention

[0003] The purpose of this invention is to provide a design method, apparatus, equipment, and medium for the secondary lining structure of a gas storage facility, thereby improving the aforementioned problems. To achieve the above objective, the technical solution adopted by this invention is as follows:

[0004] In a first aspect, this application provides a design method for a secondary lining structure of a gas storage facility, comprising: acquiring gas storage facility parameter data, surrounding rock data, high-pressure air load data, and external water data; constructing a basic model based on the gas storage facility parameter data and surrounding rock data; performing construction simulation based on the basic model, with temporary supports during construction bearing all surrounding rock loads and the secondary lining structure serving as a safety reserve, to obtain the first thickness of the secondary lining structure; performing operational period simulation based on the basic model and high-pressure air load data, by inputting different defect conditions into corresponding failure models and calculating the second thickness of the secondary lining structure; performing maintenance period simulation based on the basic model and the external water data, by calculating the residual load of the surrounding rock and the external water pressure load respectively, to calculate the third thickness of the secondary lining structure; extracting the maximum value among the first, second, and third thicknesses, and recording the extracted maximum value as the minimum thickness of the secondary lining structure.

[0005] Secondly, this application provides a secondary lining structure design device, comprising: a data acquisition module for acquiring gas storage parameter data, surrounding rock data, high-pressure air load data, and external water data; a model construction module for constructing a basic model based on the gas storage parameter data and surrounding rock data; a first simulation module for performing construction simulation based on the basic model, with temporary supports during construction bearing all surrounding rock loads and the secondary lining structure serving as a safety reserve, to obtain the first thickness of the secondary lining structure; a second simulation module for performing operational period simulation based on the basic model and high-pressure air load data, by inputting different defect conditions into the corresponding failure model and calculating the second thickness of the secondary lining structure; a third simulation module for performing maintenance period simulation based on the basic model and the external water data, by calculating the residual load of the surrounding rock and the external water pressure load respectively, to calculate the third thickness of the secondary lining structure; and a data extraction module for extracting the maximum value among the first, second, and third thicknesses, and recording the extracted maximum value as the minimum thickness of the secondary lining structure.

[0006] In a third aspect, this application provides a secondary lining structure design device, comprising: a memory for storing a computer program; and a processor for executing the computer program to implement the steps of the secondary lining structure design method for a gas storage facility as described in the first aspect.

[0007] Fourthly, this application provides a readable storage medium storing a computer program that, when executed by a processor, implements the steps of the secondary lining structure design method for a gas storage facility as described in the first aspect.

[0008] The beneficial effects of this invention are as follows:

[0009] This invention obtains the accurate minimum thickness of the secondary lining structure by simulating in stages and comprehensively considering various loads and defects, thereby effectively ensuring the safety of the gas storage secondary lining structure, reducing the risk of safety accidents, and ensuring the normal operation of the gas storage and the safety of the surrounding environment. Compared with simply increasing the thickness of the secondary lining structure, this application provides a reliable basis for the thickness design of the secondary lining structure, avoiding the increase in construction costs caused by excessive thickness of the secondary lining structure, and avoiding the failure to meet safety requirements due to insufficient thickness of the secondary lining structure.

[0010] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing embodiments of the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the secondary lining structure design method for gas storage facilities according to the present invention;

[0013] Figure 2 This is a schematic diagram of the secondary lining structure and defects of the present invention;

[0014] Figure 3 This is a schematic diagram illustrating the interaction between the anchor bolt of the present invention and the surrounding rock;

[0015] Figure 4 This is a schematic diagram of the secondary lining structure design device of the present invention;

[0016] Figure 5 This is a schematic diagram of the secondary lining structure design equipment of the present invention.

[0017] The diagram is labeled as follows: 10. Secondary lining structure; 11. Longitudinal crack; 21. Defect; 22. Void influence zone; 30. Anchor bolt; 41. Data acquisition module; 42. Model construction module; 43. First simulation module; 44. Second simulation module; 45. Third simulation module; 46. Data extraction module; 50. Secondary lining structure design equipment; 51. Processor; 52. Memory; 53. Multimedia component; 54. I / O interface; 55. Communication component. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Example 1:

[0021] like Figure 1 As shown in the figure, this embodiment provides a design method for the secondary lining structure of a gas storage facility, including:

[0022] S100 acquires gas storage parameter data, surrounding rock data, high-pressure air load data, and external water data.

[0023] In some embodiments, the gas storage parameter data includes various data related to the gas storage, including but not limited to the design radius and design span of the gas storage, the design thickness of the temporary support, the concrete strength data used to manufacture the secondary lining structure 10, and the steel reinforcement parameter data used to manufacture the secondary lining structure 10; the surrounding rock data includes but is not limited to the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass.

[0024] During operation, the gas storage facility stores high-pressure air. The high-pressure air load data includes, but is not limited to, the load exerted by the high-pressure air inside the gas storage facility on the secondary lining structure 10. During maintenance, the high-pressure air inside the gas storage facility is vented, meaning the internal air pressure is 0. However, at this time, the secondary lining structure 10 is subjected to external groundwater loads, etc. Therefore, the external water data includes, but is not limited to, the location of external groundwater.

[0025] S200 constructs a basic model based on gas storage parameter data and surrounding rock data.

[0026] In some embodiments, a basic model is constructed using the acquired gas storage parameter data and surrounding rock data. This basic model can provide a basic framework for subsequent simulation analysis at different stages, thereby reflecting the basic characteristics and interrelationships of the gas storage and surrounding rock.

[0027] S300 performs construction simulation based on the basic model, with the temporary support during construction bearing all the surrounding rock load, and the secondary lining structure 10 serving as a safety reserve, thus obtaining the first thickness of the secondary lining structure 10.

[0028] In some embodiments, the construction phase is simulated based on the constructed basic model. During the construction simulation, since the temporary support during construction bears all the surrounding rock load, and the secondary lining structure 10 mainly serves as a safety reserve, the thickness of the secondary lining structure 10 only needs to meet the minimum thickness required by the structural requirements.

[0029] It is worth mentioning that the radius and other parameters of the secondary lining structure 10 with different structures are different. Therefore, the minimum thickness that meets the construction requirements of the secondary lining structure 10 with different structures is different. That is, the secondary lining structure 10 with different structures has a corresponding minimum thickness that meets the construction requirements. Therefore, after obtaining the database parameter data, the first thickness of the secondary lining structure 10 can be directly obtained through construction simulation.

[0030] S400 performs operational simulations based on the basic model and high-pressure air load data. By inputting different defect conditions into the corresponding failure model, the second thickness of the secondary lining structure 10 is calculated.

[0031] In some embodiments, during the operation of the gas storage facility, high-pressure gas is stored inside the gas storage facility. Based on the basic model and combined with high-pressure air load data, this application simulates the situation of the gas storage facility during operation, and inputs different defect conditions into the corresponding failure model. The second thickness required for the secondary lining structure 10 during the operation period is calculated.

[0032] It is worth mentioning that the defects can be construction quality defects such as geological defects in the surrounding rock, cavities behind the temporary support (cavities behind the shotcrete), and cavities behind the secondary lining structure 10. In other words, the defects can be pits in the surrounding rock, temporary support, or secondary lining structure 10. This application inputs different defect conditions (pits of different sizes) into the corresponding failure model, and calculates the second thickness of the secondary lining structure 10 through the corresponding failure model. The second thickness is the minimum thickness of the secondary lining structure 10 to overcome the defect condition and ensure the structural strength of the secondary lining structure 10 itself.

[0033] S500 performs maintenance period simulation based on the basic model and external water data. By calculating the residual load of the surrounding rock and the external water pressure load respectively, the third thickness of the secondary lining structure 10 is calculated.

[0034] In some embodiments, when the gas storage tank is under maintenance, the internal gas pressure is zero. At this time, the secondary lining structure 10 is only subjected to external water pressure load and residual load of the surrounding rock. Therefore, based on the basic model and external water data, this application simulates the state of the gas storage tank during maintenance, calculates the residual load of the surrounding rock and the external water pressure load respectively, and then calculates the third thickness of the secondary lining structure 10 during maintenance based on the residual load of the surrounding rock or the external water pressure load. That is, the third thickness is the minimum thickness of the secondary lining structure 10 during maintenance to overcome the external water pressure load and the residual load of the surrounding rock and meet its own structural strength.

[0035] S600 extracts the maximum value among the first thickness, second thickness and third thickness, and records the extracted maximum value as the minimum thickness of the secondary lining structure 10.

[0036] In some embodiments, the maximum value is extracted from the first thickness, second thickness and third thickness calculated from the above steps, and this maximum value is determined as the minimum thickness of the secondary lining structure 10, so as to obtain the minimum design thickness of the secondary lining structure 10 that can meet the safety requirements at each stage of construction, operation and maintenance.

[0037] It is understandable that gas storage facilities face significantly different loads and operating conditions at different stages (construction, operation, and maintenance). During construction, the relationship between temporary support and surrounding rock loads is primarily considered; during operation, they are affected by high-pressure air and may also experience various defects; and during maintenance, the effects of external water and residual surrounding rock loads must be considered. Therefore, this application, through phased simulation, can more accurately analyze and determine the minimum safe thickness of the secondary lining structure 10 under different operating conditions.

[0038] Specifically, in the construction simulation, the secondary lining structure 10 is used as a safety reserve. Under normal circumstances, the temporary support bears the main load, while the secondary lining structure 10 plays an additional safety guarantee role, ensuring that the secondary lining structure 10 can withstand a certain load when the temporary support fails, thus ensuring the safety of the gas storage facility. At this time, the thickness of the secondary lining structure 10 only needs to meet the minimum thickness requirements of the structure. In the operation simulation, different defect conditions are input into the failure model for calculation. By considering these defects 21, the minimum safe thickness of the secondary lining structure 10 during operation can be calculated under these defect conditions. In the maintenance simulation, by considering the compression of the secondary lining structure 10 by the residual load of the surrounding rock and the external water pressure load, the minimum safe thickness of the secondary lining structure 10 under the conditions of the residual load of the surrounding rock and the external water pressure load can be calculated.

[0039] Finally, the maximum value among the first thickness, the second thickness, and the third thickness is extracted as the minimum thickness of the secondary lining structure 10 to ensure that the secondary lining structure 10 can be safe at each stage, thereby ensuring that the secondary lining structure 10 has sufficient load-bearing capacity at any stage and avoiding safety accidents caused by insufficient thickness of the secondary lining structure 10.

[0040] According to the design method of the secondary lining structure for gas storage facilities of the present invention, by simulating in stages and comprehensively considering various loads and defects, the minimum thickness of the secondary lining structure 10 is obtained accurately, thereby effectively ensuring the safety of the secondary lining structure 10 of the gas storage facility, reducing the risk of safety accidents, ensuring the normal operation of the gas storage facility and the safety of the surrounding environment. Compared with simply increasing the thickness of the secondary lining structure 10, this application provides a reliable basis for the thickness design of the secondary lining structure 10, avoiding the increase in construction costs caused by the excessive thickness of the secondary lining structure 10, and avoiding the failure to meet safety requirements caused by the insufficient thickness of the secondary lining structure 10.

[0041] According to some embodiments of the present invention, a basic model is constructed based on gas storage parameter data and surrounding rock data, including:

[0042] Extract the gas storage facility's radius, concrete shear strength, steel shear strength, vertical steel reinforcement cross-sectional area, and circumferential steel reinforcement cross-sectional area from the gas storage facility's parameter data.

[0043] In some embodiments, parameters such as the radius of the gas storage facility, the shear strength of the concrete, the shear strength of the reinforcing steel, the cross-sectional area of ​​the vertical reinforcing steel, and the cross-sectional area of ​​the circumferential reinforcing steel are extracted from the acquired gas storage facility parameter data. These parameters reflect the structural characteristics of the gas storage facility itself and the mechanical properties of the materials used.

[0044] Extract the surrounding rock load, internal friction angle, and unit weight of the rock mass from the surrounding rock data.

[0045] In some embodiments, the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass are extracted from the surrounding rock data. The surrounding rock load can reflect the pressure exerted by the surrounding rock on the gas storage tank; the internal friction angle of the surrounding rock can reflect the friction characteristics between particles inside the surrounding rock, thereby reflecting the stability and stress of the surrounding rock; and the unit weight of the rock mass represents the weight of the rock mass per unit volume.

[0046] A basic model is constructed based on the radius of the gas storage facility, the shear strength of the concrete, the shear strength of the steel reinforcement, the cross-sectional area of ​​the vertical reinforcement, the cross-sectional area of ​​the circumferential reinforcement, the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass.

[0047] In some embodiments, a basic model for subsequent analysis is constructed based on the various parameters of the gas storage tank and surrounding rock extracted above. Specifically, when constructing the basic model of this application, the approximate outline dimensions of the entire secondary lining structure 10 are first determined according to the radius of the gas storage tank to construct a geometric model. Then, based on parameters such as the shear strength of concrete, the shear strength of steel bars, the cross-sectional area of ​​vertical steel bars, and the cross-sectional area of ​​circumferential steel bars, the position, shape, and size of the steel bars are arranged in the geometric model to reflect the mechanical properties of the secondary lining structure 10 in different directions. Subsequently, combined with the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass, the geometric characteristics of the contact part between the secondary lining structure 10 and the surrounding rock, as well as the overall morphology of the secondary lining structure 10 under the action of the surrounding rock, are determined. In this way, a basic model that can accurately reflect the geometric characteristics of the secondary lining structure 10 of the gas storage tank under given parameter conditions is constructed.

[0048] Therefore, this basic model comprehensively considers the structural characteristics of the gas storage facility and the mechanical properties of the surrounding rock, thus providing an accurate basic framework for subsequent construction simulation, operation simulation and maintenance simulation, so as to more accurately analyze the stress situation of the secondary lining structure 10 at different stages and design a reasonable thickness.

[0049] Understandably, the radius of the gas storage facility determines its spatial dimensions and shape, directly affecting the overall stress distribution and interaction with the surrounding rock. The shear strength of the concrete and the shear strength of the reinforcing steel reflect the shear capacity of the secondary lining structure 10. The secondary lining structure 10 includes vertical and circumferential reinforcing steel. The cross-sectional areas of the vertical and circumferential reinforcing steel reflect the configuration of the reinforcing steel in the gas storage structure, thus together with the shear strength of the concrete and the shear strength of the reinforcing steel, reflecting the shear capacity of the secondary lining structure 10.

[0050] The surrounding rock load directly represents the pressure exerted by the surrounding rock on the gas storage tank; the internal friction angle of the surrounding rock can reflect the stability of the surrounding rock; the unit weight of the rock mass is used to calculate the self-weight load of the surrounding rock, and thus determine the magnitude of the pressure exerted by the surrounding rock on the gas storage tank.

[0051] Therefore, by integrating the structural parameters of the gas storage tank and the mechanical parameters of the surrounding rock to construct a basic model, this application can more realistically simulate the interaction between the gas storage tank and the surrounding rock, thereby more accurately reflecting the complex mechanical environment of the secondary lining structure 10 in actual engineering, and thus providing a reliable basis for the subsequent simulation analysis of the secondary lining structure 10.

[0052] Please refer to some embodiments of the present invention. Figure 2 The second thickness includes the first minimum thickness, which is the minimum safe thickness of the secondary lining structure 10 considering only defects. The process of obtaining the first minimum thickness includes:

[0053] Extract the internal friction angle of the surrounding rock from the surrounding rock data.

[0054] In some embodiments, the internal friction angle of the surrounding rock is extracted from the surrounding rock data. The internal friction angle can reflect the frictional characteristics between particles inside the surrounding rock, thereby reflecting the stability and stress condition of the surrounding rock.

[0055] Input the internal friction angle of the surrounding rock and the preset defect data into the preset punching failure model, and calculate the first minimum thickness. The defect data includes the diameter and depth of defect 21. Defect 21 is a geological defect of the surrounding rock, a defect formed by the sprayed concrete construction of the temporary support, or a defect formed by the concrete construction of the secondary lining structure 10.

[0056] In some embodiments, defect 21 may be a pit in the surrounding rock geology, a pit formed by the sprayed concrete construction of the temporary support (a pit on the temporary support), or a pit formed by the concrete construction of the secondary lining structure 10.

[0057] This application calculates the first minimum thickness by inputting the diameter and depth of the designed pit and the internal friction angle of the surrounding rock into a preset punching failure model, thereby obtaining the minimum safe thickness of the secondary lining structure 10 to overcome the pit defect.

[0058] It should be noted that the calculated first minimum thickness includes:

[0059] The cavity influence width is calculated based on the depth of defect 21 and the internal friction angle of the surrounding rock. The cavity influence width is the width of the cavity influence zone 22, which is located on the outer periphery of defect 21.

[0060] In some embodiments, the outer periphery of the pit defect has a cavity influence zone 22. The width of the cavity influence zone 22 can be calculated based on the depth of the pit and the internal friction angle of the surrounding rock, using the following formula:

[0061] c = b * tan(45 - φ / 2);

[0062] Where c represents the width of the cavity's influence (the width of the cavity's influence zone 22), b represents the depth of the pit, and φ represents the internal friction angle of the surrounding rock.

[0063] The first minimum thickness is calculated based on the width of the void effect and the diameter of defect 21.

[0064] In some embodiments, to ensure that the pitting defect does not cause punching failure of the secondary lining structure 10, the first minimum thickness of the secondary lining structure 10 can be calculated based on the width of the void influence and the diameter of the defect 21, using the following formula:

[0065]

[0066] Where h1 represents the first minimum thickness, b represents the depth of the pit, φ represents the internal friction angle of the surrounding rock, and a represents the diameter of the pit.

[0067] Understandably, by considering various defect scenarios and calculating the first minimum thickness, the impact of defects on the safety of the secondary lining structure 10 can be assessed more accurately, thereby designing a more reasonable thickness for the secondary lining structure 10, effectively improving the safety of the secondary lining structure 10, reducing the risk of structural damage caused by defects 21, and by clearly distinguishing the first minimum thickness under the condition of considering only defects, the design process becomes more targeted. This allows for targeted calculations and analyses based on different types and severity of defects 21, optimizing the design scheme of the secondary lining structure 10, and avoiding problems of over-design or under-design.

[0068] According to some embodiments of the present invention, the second thickness includes a second minimum thickness, which is the minimum safe thickness of the secondary lining structure considering defect conditions and concrete shear strength. The process of obtaining the second minimum thickness includes:

[0069] The concrete shear strength data, the diameter and thickness of defect 21, the internal friction angle of the surrounding rock, and the high-pressure air load data are input into the preset concrete direct shear failure model, and the first safety factor is calculated.

[0070] The second minimum thickness is obtained based on the first safety factor.

[0071] In some embodiments, considering only the concrete shear strength and defect conditions, the secondary lining structure 10 satisfies the condition for shear failure as follows:

[0072]

[0073] Therefore, the formula for calculating the first safety factor of the secondary lining structure 10 (concrete direct shear failure model) is:

[0074]

[0075] Therefore, the formula for calculating the second minimum thickness can be derived as follows:

[0076]

[0077] Where h2 represents the second minimum thickness, b represents the depth of the pit, φ represents the internal friction angle of the surrounding rock, a represents the diameter of the pit, K1 represents the first safety factor, P0 represents the high-pressure air load, and f cs This indicates the shear strength of concrete.

[0078] It is worth mentioning that the first safety factor K1 for different secondary lining structures with a thickness of 10 can be obtained from Table 1.

[0079] Table 1

[0080]

[0081] It is understandable that this application comprehensively considers the defect situation and concrete shear strength to calculate the second minimum thickness, which can more comprehensively assess the safety of the secondary lining structure 10 under complex working conditions, ensure that the secondary lining structure 10 has sufficient safety reserve, effectively reduce the risk of structural failure caused by defect 21 or concrete shear failure, and improve the overall safety and reliability of the gas storage facility.

[0082] According to some embodiments of the present invention, the second thickness includes a third minimum thickness, which is the minimum safe thickness of the secondary lining structure 10 considering defect conditions, concrete shear strength, and steel shear strength. The process of obtaining the third minimum thickness includes:

[0083] Input the shear strength of the steel bars, the cross-sectional area of ​​the vertical steel bars, the cross-sectional area of ​​the circumferential steel bars, the shear strength of the concrete, the diameter and height of defect 21, the internal friction angle of the surrounding rock, and the high-pressure air load data into the preset first reinforced concrete direct shear failure model, and calculate the second safety factor.

[0084] The third minimum thickness is obtained based on the second safety factor.

[0085] In some embodiments, considering defects, concrete shear strength, and steel shear strength, the secondary lining structure 10 satisfies the condition for shear failure as follows:

[0086]

[0087] Therefore, the formula for calculating the second safety factor of the secondary lining structure 10 (first reinforced concrete direct shear failure model) is:

[0088]

[0089] Therefore, the formula for calculating the second minimum thickness can be derived as follows:

[0090]

[0091] Where h3 represents the second minimum thickness, b represents the depth of the pit, φ represents the internal friction angle of the surrounding rock, a represents the diameter of the pit, K2 represents the second safety factor, P0 represents the high-pressure air load, and f cs f represents the shear strength of concrete. ss Indicates the shear strength of the steel reinforcement, A h A represents the cross-sectional area of ​​the longitudinal reinforcement. z This indicates the cross-sectional area of ​​the circumferential reinforcing bars.

[0092] It is worth mentioning that the second safety factor K2 for different secondary lining structures with a thickness of 10 can be obtained from Table 2.

[0093] Table 2

[0094]

[0095] It is understood that this application comprehensively considers the defect situation, concrete shear strength and steel shear strength to calculate the third minimum thickness, which can more comprehensively and accurately assess the safety of the secondary lining structure 10 under complex working conditions, so as to ensure that the secondary lining structure 10 has sufficient safety reserve to effectively reduce the risk of structural failure caused by defects, concrete or steel shear failure, and improve the overall safety and reliability of the gas storage facility.

[0096] Meanwhile, based on the above calculation model and parameters, the calculated third minimum thickness can provide a more reasonable basis for the design of the secondary lining structure 10. Designers can optimize the structural thickness and steel reinforcement configuration according to the calculation results, avoid material waste and cost increase caused by over-design, and ensure that the secondary lining structure 10 meets safety requirements.

[0097] According to some embodiments of the present invention, the outer periphery of defect 21 has a void influence zone 22. When the secondary lining structure 10 has two longitudinal cracks 11, and the two longitudinal cracks 11 are located at the outer periphery of the void influence zone 22, the second thickness includes a fourth minimum thickness. The fourth minimum thickness is the minimum safe thickness of the secondary lining structure considering the defect situation, concrete shear strength, steel shear strength, and the secondary lining structure 10 having two longitudinal cracks 11. The process of obtaining the fourth minimum thickness includes:

[0098] Input the shear strength of the steel bars, the cross-sectional area of ​​the vertical steel bars, the cross-sectional area of ​​the circumferential steel bars, the shear strength of the concrete, the diameter and height of defect 21, the internal friction angle of the surrounding rock, and the high-pressure air load data into the preset second reinforced concrete direct shear failure model, and calculate the third safety factor.

[0099] The fourth minimum thickness is obtained based on the third safety factor.

[0100] In some embodiments, considering defects, concrete shear strength, and steel shear strength, if the secondary lining structure 10 has two longitudinal cracks 11, this is the most unfavorable state for the secondary lining structure 10. In this case, the secondary lining structure 10 satisfies the condition for shear failure as follows:

[0101]

[0102] Therefore, the formula for calculating the third safety factor of the secondary lining structure 10 (second reinforced concrete direct shear failure model) is as follows:

[0103]

[0104]

[0105] Therefore, the formula for calculating the second minimum thickness can be derived as follows:

[0106]

[0107] Where h4 represents the second minimum thickness, b represents the depth of the pit, φ represents the internal friction angle of the surrounding rock, a represents the diameter of the pit, K3 represents the second safety factor, P0 represents the high-pressure air load, and f cs f represents the shear strength of concrete. ss Indicates the shear strength of the steel reinforcement, A h A represents the cross-sectional area of ​​the longitudinal reinforcement. z This indicates the cross-sectional area of ​​the circumferential reinforcing bars.

[0108] It is worth mentioning that the third safety factor K3 for different secondary lining structures with a thickness of 10 can be obtained from Table 3.

[0109] Table 3

[0110]

[0111] It is understandable that this application comprehensively considers various complex factors such as defect 21, longitudinal crack 11, and shear strength of concrete and steel bars to calculate the fourth minimum thickness, which can more accurately assess the safety of the secondary lining structure 10 under specific complex working conditions, so as to ensure that the secondary lining structure 10 still has sufficient safety reserve in the presence of defect 21 and longitudinal crack 11, effectively reducing the risk of structural failure and improving the overall safety of the gas storage facility.

[0112] Meanwhile, the fourth minimum thickness calculated based on the above calculation model and parameters can provide a more reasonable and accurate basis for the design of secondary lining structure 10 with similar complex defects 21 and longitudinal cracks 11, avoiding over-design or under-design, and improving the quality and efficiency of secondary lining structure 10 design.

[0113] According to some embodiments of the present invention, the third thickness is calculated, including:

[0114] Extract the location of the groundwater level from external water data.

[0115] In some embodiments, the external water data includes information related to the groundwater level, from which the location of the groundwater level is accurately extracted.

[0116] The external water pressure load is obtained based on the location of the groundwater level.

[0117] Understandably, the external water pressure load acting on the secondary lining structure 10 is derived based on the location of the groundwater level. It is worth noting that the external water pressure load is obtained by applying hydraulic principles and formulas to the locations of the groundwater level and the gas storage tank.

[0118] In some embodiments, the surrounding rock of the gas storage cavern, micro-neoplastic granite, is predominantly slightly permeable, with weakly permeable areas at the site of local faults and fissures. Therefore, the recommended values ​​for the external groundwater pressure reduction factor β are: 0.1 < β < 0.2 for slightly permeable rock layers and 0.2 < β < 0.4 for weakly permeable rock layers. The groundwater level is H meters above the gas storage. Referring to domestic pumped storage projects and hydropower station engineering cases, the design value of the external water pressure acting on the lining concrete structure (secondary lining structure 10) can be 0.2 to 0.5 times the standard value. Therefore, under a conservative consideration, the calculation formula for the external water pressure load is:

[0119] P e =0.5*β*γ w *H;

[0120] Among them, P e γ represents the external water pressure load, β represents the reduction factor for external groundwater pressure, and γ represents the groundwater external water pressure load. w It indicates the density of water.

[0121] The residual surrounding rock load is obtained based on the unit weight of the rock mass.

[0122] In some embodiments, the residual surrounding rock load refers to the load that the surrounding rock still acts on the secondary lining structure 10 after undergoing certain deformation and stress adjustment. The unit weight of the rock mass reflects the weight per unit volume of the rock mass, and the residual surrounding rock load can be calculated based on the unit weight of the rock mass.

[0123] The third thickness is calculated based on the maximum value of the residual surrounding rock load and the external water pressure load, and the radius of the gas storage tank.

[0124] In some embodiments, after obtaining the residual surrounding rock load and the external water pressure load, the maximum value of the residual surrounding rock load and the external water pressure load is taken, and then combined with the radius of the gas storage tank to calculate the third thickness of the secondary lining structure 10. The third thickness is the minimum safe thickness of the secondary lining structure 10 to overcome the external water pressure and the residual surrounding rock load.

[0125] It is worth mentioning that you should refer to Figure 3 The residual surrounding rock load is obtained based on the unit weight of the rock mass, including:

[0126] Extract the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure 10 from the gas storage parameter data;

[0127] In some embodiments, the circumferential and longitudinal reinforcing bars of the secondary lining structure 10 are fixed to the surrounding rock by anchor bolts 30, the distance between the circumferential reinforcing bars of the secondary lining structure 10 is S1, and the distance between the longitudinal reinforcing bars of the secondary lining structure 10 is S2.

[0128] The residual surrounding rock load is calculated based on the maximum distance between the circumferential and longitudinal reinforcing bars of the secondary lining structure 10 and the unit weight of the rock mass.

[0129] In some embodiments, the anchor bolt 30 remains stable under repeated alternating loads, and the anchoring force of the anchor head of the anchor bolt 30 diffuses 45° toward the surrounding rock. Therefore, the formula for calculating the residual load of the surrounding rock is:

[0130]

[0131] Among them, P c Indicates the residual load of the surrounding rock, γ r S1 represents the unit weight of the rock mass, S2 represents the distance between the circumferential reinforcing bars of the secondary lining structure, and S3 represents the distance between the longitudinal reinforcing bars of the secondary lining structure.

[0132] It is worth mentioning that the formula for calculating the third thickness is:

[0133]

[0134] Among them, P i =Pe or P i =P c h5 indicates the third thickness, f ck This indicates the compressive strength of concrete.

[0135] In some specific embodiments, during the construction period, the initial support bears all the surrounding rock load, and the secondary lining structure 10 serves as a safety reserve. The thickness of the secondary lining structure 10 only needs to meet the minimum thickness required by the structural requirements (25cm). The Jiuquan No. 1 gas storage facility is mainly composed of Class II and Class III surrounding rock, accounting for 95.56%, and the surrounding rock stability is relatively good. The surrounding rock load of a 16m span tunnel in Class III surrounding rock is only 91kPa, and the use of a 40cm thick secondary lining structure is sufficient to ensure safety during the construction period.

[0136] During the operational phase, geological defects and construction quality defects (defects formed by the shotcrete construction of temporary supports or defects formed by the concrete construction of the secondary lining structure 10) require the secondary lining structure 10 to have a certain thickness to ensure that local defects do not cause damage to the secondary lining structure 10. The size of geological defects and construction defects is mainly affected by detection capabilities and construction capabilities. According to the accuracy of the ground-penetrating radar detection equipment, the high-frequency antenna can identify cavities with a diameter ≥ 5cm (within 0.5m burial depth); the low-frequency antenna can identify cavities with a diameter ≥ 10cm (within 2m burial depth). Therefore, cavities smaller than 10cm are difficult to detect, and the secondary lining structure 10 needs to ensure that 10cm cavities do not cause damage. If the diameter of the defective cavity is 10cm, considering the crushing effect caused by the high-pressure air load around the cavity, and the crushing of the surrounding rock within a range of one cavity diameter around the cavity, then according to the above calculation, the defect influence range (defect influence width) is approximately 30cm. If the punching shear fracture angle of the secondary lining structure 10 is 45°, then for a defect influence range of 30cm, the minimum thickness of the secondary lining structure 10 is 15cm. Therefore, the 40cm thick secondary lining structure 10 can meet the requirements of high-pressure air load during operation.

[0137] During the maintenance period, anchor bolts 30 remained stable under repeated alternating loads. If the spacing of anchor bolts 30 was 1.5m, the load caused by the crushing of the surrounding rock and shotcrete would be 0.75m * 25kPa / m = 18.75kPa. This indicates that the load on the surrounding rock was very small, and the tunnel lining structure 10 mainly bore the external water pressure load. Calculation results show that the 40cm thick lining structure 10 can withstand an external water pressure load of 0.94MPa. The groundwater level of the Jiuquan project is approximately 80m above the gas storage facility, with a maximum water pressure of approximately 0.8MPa. Considering that the surrounding rock of the gas storage cavern, the micro-new granite, is mainly slightly permeable with a low permeability coefficient, and that a drainage system is installed around the gas storage facility, the actual external water pressure will be much less than 0.8MPa. Therefore, the 40cm thick lining structure 10 is sufficient to meet the water pressure resistance requirements during maintenance.

[0138] Example 2:

[0139] like Figure 4 As shown, the present invention provides a secondary lining structure design device, comprising:

[0140] Data acquisition module 41 is used to acquire gas storage parameter data, surrounding rock data, high-pressure air load data, and external water data;

[0141] Model construction module 42 is used to construct a basic model based on gas storage parameter data and surrounding rock data;

[0142] The first simulation module 43 is used to perform construction simulation based on the basic model, with the temporary support during construction bearing all the surrounding rock load and the secondary lining structure as a safety reserve, to obtain the first thickness of the secondary lining structure.

[0143] The second simulation module 44 is used to perform operational simulation based on the basic model and high-pressure air load data. By inputting different defect conditions into the corresponding failure model, the second thickness of the secondary lining structure is calculated.

[0144] The third simulation module 45 is used to perform maintenance period simulation based on the basic model and the external water data. By calculating the residual load of the surrounding rock and the external water pressure load respectively, the third thickness of the secondary lining structure is calculated.

[0145] The data extraction module 46 is used to extract the maximum value among the first thickness, the second thickness and the third thickness, and record the extracted maximum value as the minimum thickness of the secondary lining structure.

[0146] According to some embodiments of the present invention, the model construction module 42 includes:

[0147] The first extraction unit is used to extract the radius of the gas storage facility, the shear strength of the concrete, the shear strength of the steel reinforcement, the cross-sectional area of ​​the vertical steel reinforcement, and the cross-sectional area of ​​the circumferential steel reinforcement from the parameter data of the gas storage facility.

[0148] The second extraction unit is used to extract the surrounding rock load, internal friction angle of the surrounding rock, and unit weight of the rock mass from the surrounding rock data.

[0149] The model building unit is used to build the basic model based on the radius of the gas storage tank, the shear strength of the concrete, the shear strength of the steel reinforcement, the cross-sectional area of ​​the vertical steel reinforcement, the cross-sectional area of ​​the circumferential steel reinforcement, the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass.

[0150] According to some embodiments of the present invention, the second thickness includes a first minimum thickness, which is the minimum safe thickness of the secondary lining structure 10 considering only defects, and the second simulation module 44 includes:

[0151] The third extraction unit is used to extract the internal friction angle of the surrounding rock from the surrounding rock data;

[0152] The first data calculation unit is used to input the internal friction angle of the surrounding rock and preset defect data into a preset punching shear failure model, and calculate the first minimum thickness. The defect data includes the diameter and depth of the defect, and the defect is a geological defect in the surrounding rock, a defect formed by the shotcrete construction of the temporary support, or a defect formed by the concrete construction of the secondary lining structure.

[0153] The first data calculation unit includes:

[0154] The first calculation subunit is used to calculate the width of the cavity based on the depth of the defect and the internal friction angle of the surrounding rock.

[0155] The second calculation subunit is used to calculate the first minimum thickness based on the width of the void effect and the diameter of the defect.

[0156] According to some embodiments of the present invention, the third simulation module 45 includes:

[0157] The fourth extraction unit is used to extract the location of the groundwater level from the external water data;

[0158] The second data calculation unit is used to obtain the external water pressure load based on the location of the groundwater level;

[0159] The third data calculation unit is used to obtain the residual surrounding rock load based on the unit weight of the rock mass.

[0160] The fourth data calculation unit is used to calculate the third thickness based on the maximum value of the residual surrounding rock load and the external water pressure load, and the radius of the gas storage tank; wherein

[0161] The third data calculation unit includes:

[0162] The first extraction subunit is used to extract the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure in the gas storage parameter data;

[0163] The third calculation subunit is used to calculate the residual surrounding rock load based on the maximum value of the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure and the unit weight of the rock mass.

[0164] Example 3:

[0165] Corresponding to the above method embodiments, the present invention also provides a secondary lining structure design device 50. The secondary lining structure design device 50 described below and the secondary lining structure design method for gas storage tanks described above can be referred to in correspondence with each other.

[0166] Figure 5 This is a block diagram illustrating a secondary lining structure design device 50 according to an exemplary embodiment. (See diagram below.) Figure 5As shown, the secondary lining structure design device 50 includes a processor 51 and a memory 52. ​​The secondary lining structure design device 50 may also include one or more of a multimedia component 53, an I / O interface 54, and a communication component 55.

[0167] The processor 51 controls the overall operation of the secondary lining structure design device 50 to complete all or part of the steps in the aforementioned method for designing the secondary lining structure of a gas storage facility. The memory 52 stores various types of data to support the operation of the secondary lining structure design device 50. This data may include, for example, instructions for any application or method operating on the secondary lining structure design device 50, and application-related data such as contact data, sent and received messages, images, audio, video, etc. The memory 52 can be implemented using any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Multimedia component 53 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 52 or transmitted via communication component 55. The audio component also includes at least one speaker for outputting audio signals. I / O interface 54 provides an interface between processor 51 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 55 is used for wired or wireless communication between the secondary liner structure design device 50 and other devices. Wireless communication may include Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of these. Therefore, the corresponding communication component may include a Wi-Fi module, a Bluetooth module, or an NFC module.

[0168] In an exemplary embodiment, the secondary lining structure design device 50 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described track component identification method for turnouts.

[0169] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the above-described method for designing a secondary lining structure for a gas storage facility. For example, the computer-readable storage medium may be the memory 52 including program instructions, which may be executed by the processor 51 of the secondary lining structure design device 50 to complete the above-described method for designing a secondary lining structure for a gas storage facility.

[0170] Example 4:

[0171] Corresponding to the above method embodiments, this embodiment also provides a readable storage medium. The readable storage medium described below can be referred to in conjunction with the secondary lining structure design method for gas storage tanks described above.

[0172] A readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the secondary lining structure design method for a gas storage facility as described in the above method embodiments.

[0173] Specifically, the readable storage medium can be a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, or any other readable storage medium capable of storing program code.

[0174] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0175] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A design method for a secondary lining structure of a gas storage facility, characterized in that, include: Acquire gas storage parameter data, surrounding rock data, high-pressure air load data, and external water data; A basic model is constructed based on gas storage parameter data and surrounding rock data; Construction simulation was carried out based on the basic model, with the temporary support during construction bearing all the surrounding rock load and the secondary lining structure (10) as a safety reserve, to obtain the first thickness of the secondary lining structure (10). Based on the basic model and high-pressure air load data, the operation period simulation was carried out. The second thickness of the secondary lining structure (10) was calculated by inputting different defect conditions into the corresponding failure model. Based on the basic model and the external water data, the maintenance period simulation was carried out. By calculating the residual load of the surrounding rock and the external water pressure load respectively, the third thickness of the secondary lining structure (10) was calculated. Extract the maximum value among the first thickness, the second thickness and the third thickness, and record the extracted maximum value as the minimum thickness of the double lining structure (10).

2. The design method for the secondary lining structure of a gas storage facility according to claim 1, characterized in that, The construction of the basic model based on gas storage parameter data and surrounding rock data includes: Extract the gas storage facility's radius, concrete shear strength, steel shear strength, vertical steel reinforcement cross-sectional area, and circumferential steel reinforcement cross-sectional area from the gas storage facility's parameter data; Extract the surrounding rock load, internal friction angle, and unit weight of the rock mass from the surrounding rock data; The basic model is constructed based on the radius of the gas storage tank, the shear strength of the concrete, the shear strength of the steel reinforcement, the cross-sectional area of ​​the vertical reinforcement, the cross-sectional area of ​​the circumferential reinforcement, the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass.

3. The secondary lining structure design method for gas storage facilities according to claim 2, characterized in that, The second thickness includes a first minimum thickness, which is the minimum safe thickness of the secondary lining structure (10) considering only defects. The process of obtaining the first minimum thickness includes: Extract the internal friction angle of the surrounding rock from the surrounding rock data; The internal friction angle of the surrounding rock and the preset defect data are input into the preset punching failure model, and the first minimum thickness is calculated. The defect data includes the diameter and depth of the defect (21). The defect (21) is a geological defect of the surrounding rock, a defect formed by the shotcrete construction of the temporary support, or a defect formed by the concrete construction of the secondary lining structure (10). The calculation of the first minimum thickness includes: The width of the cavity influence is calculated based on the depth of the defect (21) and the internal friction angle of the surrounding rock. The first minimum thickness is calculated based on the width of the void and the diameter of the defect (21).

4. The secondary lining structure design method for gas storage facilities according to claim 2, characterized in that, The calculation yields the third thickness, including: Extract the location of the groundwater level from external water data; The external water pressure load is obtained based on the location of the groundwater level. The residual surrounding rock load is obtained based on the unit weight of the rock mass. The third thickness is calculated based on the maximum value of the residual surrounding rock load and the external water pressure load, and the radius of the gas storage tank; wherein The residual surrounding rock load obtained based on the unit weight of the rock mass includes: Extract the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure (10) from the gas storage parameter data; The residual surrounding rock load is calculated based on the maximum value of the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure (10) and the unit weight of the rock mass.

5. A design device for a double-lining structure, characterized in that, include: The data acquisition module (41) is used to acquire gas storage parameter data, surrounding rock data, high-pressure air load data, and external water data; The model construction module (42) is used to construct a basic model based on the gas storage parameter data and surrounding rock data; The first simulation module (43) is used to perform construction simulation based on the basic model, with the temporary support during construction bearing all the surrounding rock load, and the secondary lining structure (10) as a safety reserve, to obtain the first thickness of the secondary lining structure (10). The second simulation module (44) is used to perform operational simulation based on the basic model and high-pressure air load data. By inputting different defect conditions into the corresponding failure model, the second thickness of the secondary lining structure (10) is calculated. The third simulation module (45) is used to simulate the maintenance period based on the basic model and the external water data. By calculating the residual load of the surrounding rock and the external water pressure load respectively, the third thickness of the secondary lining structure (10) is calculated. The data extraction module (46) is used to extract the maximum value among the first thickness, the second thickness and the third thickness, and record the extracted maximum value as the minimum thickness of the secondary lining structure (10).

6. The secondary lining structure design device according to claim 5, characterized in that, The model construction module (42) includes: The first extraction unit is used to extract the radius of the gas storage facility, the shear strength of the concrete, the shear strength of the steel reinforcement, the cross-sectional area of ​​the vertical steel reinforcement, and the cross-sectional area of ​​the circumferential steel reinforcement from the parameter data of the gas storage facility. The second extraction unit is used to extract the surrounding rock load, internal friction angle of the surrounding rock, and unit weight of the rock mass from the surrounding rock data. The model building unit is used to build the basic model based on the radius of the gas storage tank, the shear strength of the concrete, the shear strength of the steel reinforcement, the cross-sectional area of ​​the vertical steel reinforcement, the cross-sectional area of ​​the circumferential steel reinforcement, the surrounding rock load, the internal friction angle of the surrounding rock, and the unit weight of the rock mass.

7. The secondary lining structure design device according to claim 6, characterized in that, The second thickness includes a first minimum thickness, which is the minimum safe thickness of the secondary lining structure (10) considering only defects. The second simulation module (44) includes: The third extraction unit is used to extract the internal friction angle of the surrounding rock from the surrounding rock data; The first data calculation unit is used to input the internal friction angle of the surrounding rock and the preset defect data into a preset punching failure model, and calculate the first minimum thickness. The defect data includes the diameter and depth of the defect (21). The defect (21) is a geological defect of the surrounding rock, a defect formed by the sprayed concrete construction of the temporary support, or a defect formed by the concrete construction of the secondary lining structure. The first data calculation unit includes: The first calculation subunit is used to calculate the cavity influence width based on the depth of the defect (21) and the internal friction angle of the surrounding rock; The second calculation subunit is used to calculate the first minimum thickness based on the width of the void influence and the diameter of the defect (21).

8. The secondary lining structure design device according to claim 6, characterized in that, The third simulation module (45) includes: The fourth extraction unit is used to extract the location of the groundwater level from the external water data; The second data calculation unit is used to obtain the external water pressure load based on the location of the groundwater level; The third data calculation unit is used to obtain the residual surrounding rock load based on the unit weight of the rock mass. The fourth data calculation unit is used to calculate the third thickness based on the maximum value of the residual surrounding rock load and the external water pressure load, and the radius of the gas storage tank; wherein The third data calculation unit includes: The first extraction subunit is used to extract the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure (10) in the gas storage parameter data; The third calculation subunit is used to calculate the residual surrounding rock load based on the maximum value of the distance between the circumferential reinforcing bars and the distance between the longitudinal reinforcing bars of the secondary lining structure (10) and the unit weight of the rock mass.

9. A secondary lining structure design device, characterized in that, include: Memory (52) is used to store computer programs; The processor (51) is configured to implement the steps of the secondary lining structure design method for a gas storage facility as described in any one of claims 1 to 4 when executing the computer program.

10. A readable storage medium, characterized in that, The readable storage medium stores a computer program that, when executed by a processor (51), implements the steps of the secondary lining structure design method for a gas storage facility as described in any one of claims 1 to 4.

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