Groove-type skeleton, sealed lining structure, underground gas storage and construction method

1 . A groove-type skeleton, comprising a fixed base plate ( 2 ),

wherein the fixed base plate ( 2 ) has a length direction and a width direction,

wherein the fixed base plate ( 2 ) forms a clamping opening with a semi-open accommodation space at a central axis along the length direction,

wherein a top edge of at least one side of the clamping opening with a semi-open accommodation space extends inward to form a protrusion,

wherein a groove is formed on an inner side corresponding to the protrusion in the clamping opening with a semi-open accommodation space,

wherein the protrusion and the groove together form a limit groove, and

wherein a thickness of the fixed base plate ( 2 ) along the length direction at the central axis is greater than a thickness of the fixed base plate ( 2 ) on both sides, resulting in a bulge at the center of a radial cross-section of the fixed base plate ( 2 ) and a gradual decrease in thickness towards both sides.

2 . The groove-type skeleton according to claim 1 ,

wherein the fixed base plate ( 2 ) is in an axisymmetric structure with the central axis along the length direction as an axis of symmetry, and

wherein a top edge on each of two opposite sides of the clamping opening with a semi-open accommodation space extends inward to form protrusions, so that an inner side corresponding to the protrusions in the clamping opening with a semi-open accommodation space forms grooves, and

wherein the protrusions and corresponding grooves form limit grooves respectively.

3 . The groove-type skeleton according to claim 1 wherein the groove-type skeleton is made of corrosion-resistant steel.

4 . A sealing lining structure, comprising an airtight layer ( 3 ) and at least one groove-type skeleton as claimed in claim 1 ,

wherein the airtight layer ( 3 ) is positioned on the groove-type skeleton via a limit groove formed at the clamping opening with a semi-open accommodation space.

5 . The sealing lining structure according to claim 4 , wherein the airtight layer ( 3 ) is made of a material that can be deformed under pressure.

6 . The sealing lining structure according to claim 4 , wherein an edge of the airtight layer ( 3 ) is provided with a fitting part that fits with the limit groove formed at the clamping opening of the semi-open accommodation space, and the airtight layer ( 3 ) is arranged on the groove-type skeleton through the fitting part.

7 . The sealing lining structure according to claim 4 ,

wherein a plurality of the groove-type skeletons are arranged in a crisscross pattern, forming a hollow space between them; and

the airtight layer ( 3 ) is positioned within a hollowed-out area through a limit groove formed at the clamping opening with the semi-open accommodation space.

8 . The sealing lining structure according to claim 4 , wherein the sealing lining structure is arranged on an inner wall, wherein the inner wall is cylindrical shape, and

the groove-type skeleton includes a plurality of axial skeletons and a plurality of circumferential skeletons, which are crisscrossed and connected to form a hollow space between the plurality of axial skeletons and the plurality of circumferential skeletons; and

the airtight layer ( 3 ) is arranged in the hollow space through the limit groove formed at an opening with the semi-open accommodation space.

9 . The sealing lining structure according to claim 8 , wherein the plurality of axial skeletons and the plurality of circumferential skeletons are uniformly arranged.

10 . An underground gas storage facility, comprising a concrete lining layer ( 1 ) and a sealing lining structure as claimed in claim 4 ,

wherein an inner wall of the concrete lining layer ( 1 ) is cylindrical, and

wherein the sealing lining structure is fixedly arranged on the inner wall of the concrete lining layer ( 1 ) through a fixed bottom plate ( 2 ) of the groove-type skeleton.

11 . A method of constructing an underground gas storage, having a sealed lining structure as in claim 4 , the method comprising:

assembling a groove-type skeleton according to an inner diameter of the underground gas storage, the groove-type skeleton comprising a plurality of axial skeletons and a plurality of circumferential skeletons, the plurality of axial skeletons and the plurality of circumferential skeletons being connected in a crisscross pattern, forming a hollow space between the plurality of groove-type skeletons;

laying the groove-type skeleton to an inner wall of the underground gas storage, and fixing the groove-type skeleton to the inner wall of the underground gas storage;

embedding an airtight layer ( 3 ) in a hollow through a limit groove formed at a clamping opening with a semi-open accommodation space, so that the inner wall of the underground gas storage forms a sealed lining structure as claimed in claim 4 .

12 . The method of constructing an underground gas storage according to claim 11 , wherein laying the groove-type skeleton to the inner wall of the underground gas storage and fixing the groove-type skeleton to the inner wall of the underground gas storage, comprises:

drilling a first connection hole at a position on the inner wall of the underground gas storage;

adjusting a position of the groove-type skeleton so that a second connection hole of the groove-type skeleton corresponds to the position of the first connection hole on the inner wall of the underground gas storage; and

simultaneously screwing a set bolt ( 4 ) into the first and second connection holes, so that the groove-type skeleton is fixed to the inner wall of the underground gas storage.

13 . The method of constructing an underground gas storage according to claim 11 , wherein after the step of embedding the airtight layer ( 3 ) in the hollow through the limit groove formed at the clamping opening with a semi-open storage space, the sealing lining structure is formed, the method further comprising:

conducting a gas storage test on the underground gas storage to determine a sealing performance of the underground gas storage;

monitoring in real-time for potential gas leakage points in the underground gas storage.

14 . The underground gas storage according to claim 13 , wherein during the step of real-time monitoring for possible leakage points of the underground gas storage, the possible leakage points include:

the connection between the airtight layer ( 3 ) and the groove-type skeleton,

the connection between the connection part and the umbrella-shaped part of the groove-type skeleton,

the connection between the fixed bottom plate ( 2 ) of the groove-type skeleton and the inner wall of the underground gas storage, and one or more parts of the airtight layer ( 3 ) itself.

15 . The method of constructing an underground gas storage according to claim 13 , wherein the real-time monitoring of possible leakage points in the underground gas storage comprises:

installing a plurality of gas flow monitoring instruments at possible leakage points in the underground gas storage, and

labeling a location of each of the plurality of gas flow monitoring instruments;

setting an alarm threshold for each of the plurality of gas flow monitoring instruments according to the location of each of the plurality of gas flow monitoring instruments; and

determining the location of a gas leakage point in the underground gas storage based on the location label of the gas flow monitoring instrument that triggered the alarm.