Drainage device

Abstract

The utility model relates to the technical field of gas storage chambers, and discloses a drainage device which is used for a gas storage chamber and comprises a water permeable structure and a first water collecting structure. By arranging the water permeable structure and the first water collecting structure which are matched with each other, water in surrounding rock fractures in the gas storage chamber can be collected and discharged out of the gas storage chamber, and compared with a water discharging mode in the related technology, the water permeable structure in the water discharging device can be directly laid along the cross section in the gas storage chamber; drainage holes, drainage galleries and other hole channel structures do not need to be arranged on the surrounding rock, the technical effect of simplifying the construction technology of drainage of the gas storage chamber can be achieved, and the technical effect of reducing the construction cost of the drainage device can be achieved. According to the drainage device, the permeable structure is arranged between the surrounding rock and the lining, so that water in the cracks of the surrounding rock can be conducted out through the permeable structure before pressure is applied to the lining, and the technical effect of improving the protection strength of the lining in the gas storage chamber can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas storage chamber drainage, in particular to a drainage device. Background Art

[0002] Gas storage chambers typically utilize newly excavated or renovated natural or abandoned underground spaces as gas storage devices. Unlike traditional shallow surface transportation tunnels, gas storage chambers are constructed 100-200 meters underground in deep strata, reaching the designed depth through temporary or permanent transportation tunnels. The surrounding rock is excavated using drill-and-blast methods and then lined with concrete to create the chamber. To ensure the airtightness of the high-pressure chamber, a sealing layer composed of steel plates, rubber, or polymer composite materials is installed on the inner edge of the lining. This creates a modular underground gas storage structure where the sealing layer provides sealing, the lining structure provides support and transfers loads, and the surrounding rock bears the load.

[0003] During maintenance work, it was discovered that groundwater pressure in the surrounding rock could compress the lining and seals, causing them to buckle and fail, leading to leakage of the high-pressure gas stored in the gas storage chamber. To address this issue, existing methods involve reducing groundwater pressure by creating drainage corridors and holes in the surrounding rock.

[0004] The prior art discloses a device for reducing external water pressure of a deep-buried tunnel lining in a water-rich tunnel section, comprising a lining body, a plurality of first pressure-bearing plates being arranged on the outer ring of the lining body, a plurality of second pressure-bearing plates being arranged on the side close to each other of the first pressure-bearing plates, pressure-bearing grooves being provided on both side walls of the lining body, two groups of telescopic springs being provided on the bottom inner wall of the pressure-bearing grooves, a movable block being provided on the other end of the telescopic spring, a pressure-bearing block being provided on the top surface of the movable block, an inverted arch being provided on the bottom surface of the lining body, a water collecting trough being provided on both sides of the top surface of the inverted arch, a first water filter plate and a second water filter plate being provided on the water collecting trough Second water filter plate, the bottom surface of the inverted arch is provided with a drainage channel, and the top surface of the inverted arch is provided with a track support surface. When the lining body encounters too high water pressure, the water pressure will squeeze the pressure-bearing block, and when the pressure-bearing block is squeezed, it will squeeze the movable block. When the movable block is squeezed, it will further squeeze the telescopic spring. At this time, under the pressure of water pressure, the pressure-bearing block will drive the movable block to move downward. At this time, the water flow outside the lining will flow into the drainage channel through the third water pipe, thereby achieving the purpose of reducing the water pressure outside the lining and then achieving the purpose of protecting the lining body.

[0005] However, pressure-bearing grooves are opened on both side walls of the lining body, and water collection grooves are opened on both sides of the top surface of the inverted arch. This construction process is very complex, and structures such as a first bearing plate, a second bearing plate, and a telescopic spring need to be set up, increasing the complexity of the drainage structure and the construction process, and the cost is expensive, requiring hundreds of millions of costs. At the same time, third water pipes are set on both sides of the pressure-bearing groove of the lining body to reduce the pressure of the lining body. However, the lining body without the third water pipe still has the situation of being affected by external water pressure. In the long run, it is easy to affect the reliability of the sealing layer, leading to accidents such as the collapse of the tunnel and the leakage of high-pressure gas. Summary of the Invention

[0006] In view of this, the present invention provides a drainage device to solve the problems of high drainage cost and complex construction process of the existing gas storage chamber.

[0007] The present invention provides a drainage device for a gas storage chamber. The gas storage chamber includes surrounding rock and a lining. The lining is arranged inside the surrounding rock and includes:

[0008] A permeable structure is arranged between the surrounding rock and the lining for collecting and conducting water in the cracks of the surrounding rock.

[0009] A first water collection structure is arranged below the gas storage chamber. One side of the first water collection structure is communicated with the permeable structure, and the other side is communicated with the outside.

[0010] Beneficial effects: By setting the cooperating permeable structure and the first water collection structure, the water in the cracks of the surrounding rock in the gas storage chamber can be collected and discharged outside the gas storage chamber. Compared with the drainage methods of related technologies, the permeable structure in this drainage device can be directly laid along the cross-section in the gas storage chamber, and there is no need to set up pore structures such as drainage holes and drainage galleries on the surrounding rock. It can not only achieve the technical effect of simplifying the construction process of gas storage chamber drainage, but also achieve the technical effect of reducing the construction cost of this drainage device. At the same time, it can also avoid the problem of blockage of drainage holes after long-term operation. Further, the permeable structure in this drainage device is arranged between the surrounding rock and the lining. Therefore, the water in the cracks of the surrounding rock can be conducted out through the permeable structure before applying pressure to the lining, which can achieve the technical effect of strengthening the protection of the lining in the gas storage chamber, avoiding buckling failure of the lining, and further achieving the technical effect of improving the structural stability of the gas storage chamber through the setting of the drainage device.

[0011] In an optional embodiment, the permeable structure is a ring structure.

[0012] Beneficial effects: By setting the permeable structure as a ring structure, it can adapt to the cross-sectional shape of the gas storage chamber and improve the comprehensiveness of collecting water in the cracks of the surrounding rock.

[0013] In an alternative embodiment, a plurality of the water-permeable structures are provided and are spaced along the length direction of the gas storage chamber.

[0014] Advantageous effects: By providing a plurality of water-permeable structures spaced along the length direction of the gas storage chamber to increase the positions for collecting water in the surrounding rock fissures by this drainage device, the integrity of water collection in the surrounding rock corresponding to the gas storage chamber can be ensured, thereby achieving the technical effect of improving the safety of the gas storage chamber.

[0015] In an alternative embodiment, the water-permeable structure is made of a water-permeable material.

[0016] In an alternative embodiment, the water-permeable structure comprises natural coarse aggregate and cement slurry;

[0017] and / or, the cube strength of the water-permeable structure is less than 10 MPa and the porosity is not less than 20%.

[0018] Advantageous effects: By using natural coarse aggregate and cement slurry as part of the water-permeable structure, water in the surrounding rock fissures can be conducted through the water-permeable structure. At the same time, both natural coarse aggregate and cement slurry are part of the raw materials of concrete and are easily obtainable, thereby achieving the technical effect of improving the simplicity of processing the water-permeable structure. At the same time, by defining the strength and porosity of the water-permeable structure, on the premise of ensuring the water-permeable effect of the water-permeable structure, the compressive resistance of the water-permeable structure can be improved, enabling the water-permeable structure to withstand the water pressure in the surrounding rock, so as to achieve the technical effect of improving the reliability of the water-permeable structure.

[0019] In an alternative embodiment, this drainage device comprises:

[0020] A fixing structure, provided between the surrounding rock and the lining, and the water-permeable structure is fixedly connected within the fixing structure.

[0021] Advantageous effects: The fixing of the water-permeable structure is achieved through the fixing structure, so that there is no need to set hole and groove structures for fixing the water-permeable structure on the surrounding rock or the lining, thereby achieving the technical effect of saving the construction cost of this drainage device.

[0022] In an alternative embodiment, this drainage device comprises:

[0023] A protective layer, provided between the lining and the water-permeable structure, for separating the lining and the water-permeable structure and protecting the smoothness of the water-permeable structure.

[0024] Advantageous effects: By providing the protective layer, it is possible to prevent the slurry of the concrete layer from blocking the water-permeable structure during the setting of the concrete layer, and the water permeability of the water-permeable structure can be ensured through the protective layer.

[0025] In an alternative embodiment, the protective layer is made of rubber and / or plastic.

[0026] Advantageous effects: By defining the material of the protective layer, the protective layer has a hydrophobic effect, which can prevent water from entering the lining position through the water-permeable structure and the protective layer, avoiding the situation of water causing pressure on the lining. The water in the surrounding rock fissures can be discharged into the first water collection structure through the water-permeable structure, and the flow path of the water in the surrounding rock fissures can be defined, thereby achieving the technical effect of enhancing the protection of the lining.

[0027] In an alternative embodiment, the drainage device includes:

[0028] A second water collection structure, which is arranged outside the gas storage chamber, is connected to the first water collection structure on one side and is connected to the outside on the other side;

[0029] A drainage channel, which is connected between the first water collection structure and the second water collection structure.

[0030] Advantageous effects: By providing the second water collection structure and the drainage channel, the water in the first water collection structure can be discharged outside the gas storage chamber for collection, and the collected water can be discharged at regular intervals, which can reduce the number of times of discharging this part of water, so as to save manpower and material resources.

[0031] In an alternative embodiment, a blocking structure is provided in the drainage channel, and the blocking structure is used for the flow of water;

[0032] And / or, the bottom surface of the second water collection structure is lower than that of the first water collection structure. A drain pipe is connected between the second water collection structure and the outside. A driving device is provided in the second water collection structure, and the driving device is used to discharge the water in the second water collection structure to the outside through the drain pipe.

[0033] Advantageous effects: By providing the blocking structure, it can be ensured that only water in the first water collection structure enters the second water collection structure, avoiding the situation that other substances, such as pebbles, flow out of the first water collection structure and cause blockage of the drainage channel. And because the bottom surface of the second water collection structure is lower than that of the first water collection structure, it is convenient for the water in the first water collection structure to flow into the second water collection structure and collect this part of water for regular discharge. At the same time, by providing a driving device in the second water collection structure, the water in the second water collection structure can be driven to be discharged to the outside through the drain pipe, achieving the technical effect of enhancing the simplicity of water collection. Description of the Drawings <S <S

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 Cross-sectional schematic view of the drainage device in this embodiment;

[0036] Figure 2 For Figure 1 Cross-sectional schematic view in the A-A direction in.

[0037] Explanation of reference numerals:

[0038] 1, permeable structure; 2, surrounding rock; 3, lining; 4, first water collection structure; 5, fixing structure; 6, protective layer; 7, second water collection structure; 8, drainage channel; 9, barrier structure; 101, submersible pump; 11, drain pipe; 12, sealing layer; 13, ground. Specific embodiments

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0040] The following will describe the embodiments of the present invention in conjunction with Figures 1 to 2 , to describe the embodiments of the present invention.

[0041] According to an embodiment of the present invention, a drainage device is provided for a gas storage chamber. The gas storage chamber includes a surrounding rock 2 and a lining 3. The lining 3 is provided inside the surrounding rock 2 and includes:

[0042] A permeable structure 1, provided between the surrounding rock 2 and the lining 3 of the gas storage chamber. The permeable structure 1 is made of a permeable material and is used to collect and conduct the water in the cracks of the surrounding rock 2;

[0043] A first water collection structure 4, arranged at the bottom of the gas storage chamber. One side of the first water collection structure 4 is connected to the permeable structure 1, and the other side is connected to the outside.

[0044] By setting the cooperating water-permeable structure 1 and the first water-collecting structure 4, the water in the fissures of the surrounding rock 2 in the gas storage chamber can be collected and discharged outside the gas storage chamber. Compared with the drainage methods of related technologies, the water-permeable structure 1 in this drainage device can be directly laid along the cross-section inside the gas storage chamber, and there is no need to set pore structures such as drainage holes and drainage corridors on the surrounding rock 2. This can not only achieve the technical effect of simplifying the construction process of draining the gas storage chamber, but also achieve the technical effect of reducing the construction cost of this drainage device. At the same time, it can also avoid the problem of blockage of the drainage holes after long-term operation. Further, the water-permeable structure 1 in this drainage device is arranged between the surrounding rock 2 and the lining 3. Therefore, before the water in the fissures of the surrounding rock 2 exerts pressure on the lining 3, it can be conducted out through the water-permeable structure 1, which can achieve the technical effect of strengthening the protection of the lining 3 inside the gas storage chamber, avoid the buckling failure of the lining 3, and thus can achieve the technical effect of improving the structural stability of the gas storage chamber through the setting of the drainage device.

[0045] In addition, the gas storage chamber further includes a sealing layer 12. The sealing layer 12 is located inside the lining 3. Through the setting of the drainage device, the technical effect of enhancing the protection of the sealing layer 12 can be achieved, so as to further achieve the technical effect of enhancing the stability of the sealing layer 12.

[0046] In addition, in this embodiment, this drainage device further includes:

[0047] A fixing structure 5 is arranged between the surrounding rock 2 and the lining 3, and the water-permeable structure 1 is fixedly connected inside the fixing structure 5. Based on this, there is no need to set pore groove structures for fixing the water-permeable structure 1 at the surrounding rock 2 or the lining 3, so as to achieve the technical effect of saving the construction cost of this drainage device, and the fixing structure 5 can further fix the position of the water-permeable structure 1, thus achieving the technical effect of enhancing the position stability of the water-permeable structure 1.

[0048] Further, in this embodiment, the fixing structure 5 is a concrete layer. Among them, concrete is easy to obtain, which can improve the simplicity of fixing the position of the water-permeable structure 1.

[0049] Furthermore, the fixing structure 5 can directly utilize the shotcrete layer of the gas storage chamber to fix the position of the water-permeable structure 1. There is no need to separately set a layer of concrete layer to fix the water-permeable structure 1, thus achieving the technical effect of simplifying the fixing difficulty of the water-permeable structure 1.

[0050] Specifically, the diameter of the water-permeable structure 1 is not greater than the thickness of the shotcrete layer, preferably equal to the thickness of the shotcrete layer. On the premise of ensuring the stability of the position of the water-permeable structure 1, maximizing the size of the water-permeable structure 1 can achieve the technical effect of improving the water collection efficiency of the fissures in the surrounding rock 2. In other embodiments, it is also possible not to set the fixing structure 5, but to fix the water-permeable structure 1 on the surrounding rock 2 through expansion bolts.

[0051] In addition, as shown in Figure 1 In this embodiment, the water-permeable structure 1 is a ring structure, that is, the water-permeable structure 1 can be arranged along the cross-sectional shape of the gas storage chamber, which can improve the comprehensiveness of water collection in the cracks of the surrounding rock 2.

[0052] Of course, in other embodiments, the shape of the air-permeable structure can also be adjusted according to the change of the cross-sectional shape of the gas storage chamber.

[0053] In addition, as shown in Figure 1 In this embodiment, there are multiple water-permeable structures 1, which are arranged at intervals along the length direction of the gas storage chamber. Based on this, the water collection points of the drainage device can be increased, ensuring the integrity of water collection in the surrounding rock 2 around the gas storage chamber, and ensuring that the sealing layer 12 and the lining 3 layer are not affected by the water pressure in the surrounding rock 2, thereby achieving the technical effect of improving the safety of the gas storage chamber.

[0054] Furthermore, along the Figure 1 horizontal direction shown in Figure 2 , the distance between adjacent water-permeable structures 1 is in the range of 10 m to 20 m. Based on this, the comprehensiveness of water collection in the cracks of the surrounding rock 2 can be achieved. Among them, along the

[0055] horizontal direction shown in

[0056] In addition, in this embodiment, the water-permeable structure 1 is a water-permeable material, specifically including natural coarse aggregate and cement slurry, so that the formed water-permeable structure 1 is a porous low-strength concrete structure, and the cube strength is less than 10 MPa, and the porosity is not less than 20%. As an alternative implementation, the water-permeable structure 1 can also be a tubular structure with mesh holes.

[0057] Based on this, the water-permeable structure 1 not only has a certain compressive strength but also can achieve the technical effect of conducting water. At the same time, both natural coarse aggregate and cement slurry are part of the concrete raw materials and are easy to obtain, thus achieving the technical effect of improving the simplicity of obtaining the water-permeable structure 1. Furthermore, by limiting the strength and porosity of the water-permeable structure 1, while ensuring the water-permeable effect of the water-permeable structure 1, the compressive resistance of the water-permeable structure 1 is improved, so that the water-permeable structure 1 can withstand the water pressure in the surrounding rock 2, thereby achieving the technical effect of improving the reliability of the water-permeable structure 1.

[0058] Of course, in other embodiments, the composition of the water-permeable structure 1 can be adjusted according to different porosity and required cube strength of the water-permeable structure 1.

[0059] In addition, in combination with Figure 1 As shown, preferably, in this embodiment, the first water collection structure 4 is located directly below the permeable structure 1, which can ensure that the water in the surrounding rock 2 is completely conducted into the first water collection structure 4 along the shape of the permeable structure 1 under the action of gravity, improving the completeness of water collection.

[0060] Among them, the first water collection structure 4 is a drainage groove, which is arranged at the bottom surface of the gas storage chamber and can discharge the water conducted by the permeable structure 1 from the gas storage chamber. Specifically, the drainage groove can have a rectangular cross-section, and the cross-sectional size of the drainage groove is greater than 30 cm × 40 cm, which can cover the diameter of the permeable structure 1, so as to ensure that the water conducted by the permeable structure 1 can be completely collected into the drainage groove, improving the completeness of the discharge of water in the surrounding rock 2.

[0061] Furthermore, the drainage groove is provided with a filler, and the filler is used to form a support for the permeable structure 1, which can further improve the stability of the position of the permeable structure 1. Among them, the filler can be pebbles.

[0062] Specifically, the diameter of the pebbles is greater than 5 cm. At the same time, the porosity of the drainage groove after filling is not less than 30%, so as to ensure the water flow in the drainage groove.

[0063] In addition, the permeable structure 1 and the first water collection structure 4 in this embodiment are both constructed after the excavation of the gas storage chamber. Of course, in other embodiments, the drainage device can also be constructed after the construction of the gas storage chamber. Compared with other embodiments, in this embodiment, there is no need to excavate and reconstruct the lining 3 and the sealing layer 12 of the gas storage chamber, thus achieving the technical effect of improving the construction simplicity.

[0064] In addition, the drainage device further includes:

[0065] A protective layer 6, which is arranged between the lining 3 of the permeable structure 1 and the permeable structure 1, is used to separate the lining 3 of the permeable structure 1 and the permeable structure 1, and protect the smoothness of the permeable structure 1.

[0066] Based on this, it is possible to avoid the cement slurry entering the pores of the permeable structure 1 and blocking the permeable structure 1 during the pouring of the shotcrete layer. Through the protective layer 6, it can be ensured that the water permeability of the permeable structure 1 is not affected by the pouring of the shotcrete layer.

[0067] Specifically, the protective layer 6 is fixed on the permeable structure 1 by bonding or anchoring, which can improve the technical effect of the connection stability between the protective layer 6 and the permeable structure 1.

[0068] Furthermore, along Figure 1 As shown in the horizontal direction, the protective layer 6 is along Figure 1The horizontal dimension shown is greater than the dimension of the water-permeable structure 1, and the difference in dimensions is within the range of 10 cm to 20 cm, which can ensure that the protective layer 6 can completely cover the water-permeable structure 1 and enhance the protection of the water-permeable structure 1.

[0069] In addition, in this embodiment, the protective layer 6 is made of rubber. Based on this, the protective layer 6 has a hydrophobic effect, which can prevent water from entering the lining 3 through the water-permeable structure 1 and the protective layer 6 and causing pressure on the lining 3 and the sealing layer 12. Through the protective layer 6, the water in the cracks of the surrounding rock 2 can, under the action of gravity, only be discharged into the first water-collecting structure 4 through the water-permeable structure 1, which can limit the flow path of the water in the cracks of the surrounding rock 2, thereby achieving the technical effect of enhancing the protection of the lining 3 and the sealing layer 12.

[0070] Of course, in other embodiments, the protective layer 6 can also be made of plastic or a combination of rubber and plastic or other low-permeability materials, and can also achieve the technical effect of protecting the lining 3.

[0071] In addition, as shown in Figure 1 In this embodiment, the drainage device includes:

[0072] A second water-collecting structure 7, which is arranged outside the gas storage chamber, is connected to the first water-collecting structure 4 on one side and is connected to the outside on the other side;

[0073] A drainage channel 8, which is connected between the first water-collecting structure 4 and the second water-collecting structure 7.

[0074] By setting the second water-collecting structure 7 and the drainage channel 8, the water in the first water-collecting structure 4 can be discharged outside the gas storage chamber for collection, and the collected water can be discharged at intervals, eliminating the need for daily inspection and supervision, reducing the number of discharges of this part of the water, and saving manpower and material resources.

[0075] Among them, the horizontal dimension of the drainage channel 8 along Figure 1 shown is greater than 10 m, and the diameter of the drainage channel 8 can be 30 cm to 40 cm, so as to ensure that the water in the first water-collecting structure 4 can be discharged outside the range affecting the gas storage chamber through the drainage channel 8, preventing this part of the water from flowing back to the surrounding rock 2 around the gas storage chamber, thereby achieving the technical effect of enhancing the safety of the gas storage chamber.

[0076] Specifically, the bottom surface of the drainage channel 8 is connected to the bottom surface of the first water-collecting structure 4. Preferably, the bottom surface of the drainage channel 8 can be inclined downward towards the second water-collecting structure 7, for example, the inclination angle is 1°. Based on this, under the action of the inclined drainage channel 8, the drainage speed can be increased.

[0077] Meanwhile, the second water collection structure 7 is a sump pit to collect and store the water in the first water collection structure 4.

[0078] Furthermore, the cross-section of the second water collection structure 7 can be square or cylindrical, which is not limited here.

[0079] Even further, the volume of the second water collection structure 7 is not less than 100 cubic meters, which can reduce the drainage frequency required for the second water collection structure 7, for example, once a year, and can reduce the energy consumption required for this drainage device, so as to further achieve the technical effect of saving manpower and material resources.

[0080] Even further, the upper part of the second water collection structure 7 is connected to the outside, that is, the ground 13. For example, the height between the second water collection structure 7 and the ground 13 is not less than 1m.

[0081] In addition, as shown in Figure 1 In this embodiment, a barrier structure 9 is provided in the drainage channel 8, and the barrier structure 9 is used for the flow of water. Specifically, by setting the barrier structure 9, it can be ensured that only water in the first water collection structure 4 enters the second water collection structure 7, and other substances, such as pebbles, are prevented from flowing out of the first water collection structure 4, thus avoiding the occurrence of blockage of the drainage channel 8.

[0082] Among them, the barrier structure 9 is a permeable partition board, so that only water can pass through the first water collection structure 4 and be discharged into the drainage channel 8, preventing pebbles from being discharged through the first water collection structure 4 and affecting the drainage effect of the drainage channel 8, thereby achieving the technical effect of ensuring the drainage speed of the drainage channel 8.

[0083] As shown in Figure 1 In this embodiment, the bottom surface of the second water collection structure 7 is lower than that of the first water collection structure 4. A drain pipe 11 is connected between the second water collection structure 7 and the outside. A driving device is provided in the second water collection structure 7, and the driving device is used to drain the water in the second water collection structure 7 through the drain pipe 11 to the outside. By having the bottom surface of the second water collection structure 7 lower than that of the first water collection structure 4, it is convenient for the water in the first water collection structure 4 to flow into the second water collection structure 7 and collect this part of the water for regular discharge. At the same time, by having a driving device in the second water collection structure 7, the water in the second water collection structure 7 can be driven to be discharged to the outside through the drain pipe 11, enhancing the technical effect of the simplicity of water collection.

[0084] Furthermore, the driving device is a submersible pump 101, which is provided in the second water collection structure 7 and is used to drive the water in the second water collection structure 7 into the drain pipe 11 and discharge it to the ground 13 through the drain pipe 11, achieving the technical effect of continuously collecting the water in the cracks of the surrounding rock 2.

[0085] In addition, the drainage process of this drainage device is as follows:

[0086] Water in the cracks of the surrounding rock 2 enters the permeable structure 1. This part of the water can flow along the permeable structure 1 under the action of its own gravity and flow into the first water collection structure 4. Further, it flows out of the gas storage chamber through the drainage channel 8 and is stored in the second water collection structure 7. As the use time of the drainage device increases, the water level in the second water collection structure 7 rises. Then, by operating the submersible pump 101, the water in the second water collection structure 7 can be discharged to the ground 13 through the drain pipe 11, achieving the technical effect of collecting and discharging the water in the cracks of the surrounding rock 2, and enhancing the technical effect of the safety and stability of the gas storage chamber structure.

[0087] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A drainage device for a gas storage chamber, the gas storage chamber comprising surrounding rock (2) and a lining (3), the lining (3) being provided on the inner side of the surrounding rock (2), characterized in that, Comprising: A permeable structure (1) is provided between the surrounding rock (2) and the lining (3) for collecting and conducting water in the fissures of the surrounding rock (2). A first water collection structure (4) is arranged below the gas storage chamber. One side of the first water collection structure (4) is communicated with the permeable structure (1), and the other side is communicated with the outside.

2. The drainage device according to claim 1, characterized in that, The permeable structure (1) is an annular structure.

3. The drainage device according to claim 2, characterized in that, A plurality of the permeable structures (1) are provided and are arranged at intervals along the length direction of the gas storage chamber.

4. The drainage device according to claim 1, characterized in that, The permeable structure (1) is made of a permeable material.

5. The drainage device according to claim 4, characterized in that The permeable structure (1) comprises natural coarse aggregate and cement slurry. And / or, the cube strength of the permeable structure (1) is less than 10 MPa, and the porosity is not less than 20%.

6. The drainage device according to any one of claims 1-5, characterized in that Comprising: A fixing structure (5) is provided between the surrounding rock (2) and the lining (3), and the permeable structure (1) is fixedly connected therein.

7. The drainage device according to any one of claims 1-5, characterized in that, Comprising: A protective layer (6) is arranged between the lining (3) and the permeable structure (1) for separating the lining (3) and the permeable structure (1).

8. The drainage device according to claim 7, characterized in that, The protective layer (6) is made of rubber and / or plastic.

9. The drainage device according to any one of claims 1-5, characterized in that, Comprising: A second water collection structure (7) is arranged outside the gas storage chamber. One side is communicated with the first water collection structure (4), and the other side is communicated with the outside. A drainage channel (8) is connected between the first water collection structure (4) and the second water collection structure (7).

10. The drainage device according to claim 9, characterized in that, A blocking structure (9) is arranged in the drainage channel (8) for the flow of water. And / or, the bottom surface of the second water collection structure (7) is lower than that of the first water collection structure (4). A drain pipe (11) is connected between the second water collection structure (7) and the outside. A driving device is arranged in the second water collection structure (7) for discharging the water in the second water collection structure (7) to the outside through the drain pipe (11).

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