CN117569870A - An underground gas storage based on block lining structure - Google Patents

Abstract

The invention discloses an underground gas storage based on a segmented lining structure, belongs to the technical field of underground gas storage, and can solve the problem that the gas tightness of the gas storage is poor due to the fact that the sealing layer of the existing underground gas storage is easy to damage. The underground gas storage includes: surrounding rock of the cavern; the lining layer is arranged on the inner side of the wall of the surrounding rock of the cavity and is formed by surrounding a plurality of concrete lining blocks; a sealing layer arranged on the inner side of the lining layer; the sealing assembly is arranged at one end of the lining layer, which is close to the sealing layer, and is used for sealing a seam of a structural joint between two adjacent concrete lining blocks; the length of the closing component along the opening direction of the structural joint is telescopic. The invention is used for underground gas storage.

Description

An underground gas storage based on block lining structure

Technical field

The invention relates to an underground gas storage based on a block lining structure and belongs to the technical field of underground gas storage.

Background technique

Compressed air energy storage is a new energy storage technology, and the pressure of compressed air can reach more than 10MPa. In order to ensure the safety of the gas storage, most projects place the gas storage underground and rely on the strength of the rock mass to balance the pressure of the compressed air in the gas storage. The key to the success or failure of underground gas storage construction lies in the sealing performance of the gas storage. The currently commonly used sealing solution is to set a sealing layer on the surface of the lining concrete. During normal operation of a gas storage, cracks will inevitably occur in the lining concrete under high pressure. Due to the randomness of cracks, the sealing layer may be damaged during repeated loading and unloading, resulting in air leakage in the gas storage.

Contents of the invention

The invention provides an underground gas storage based on a block lining structure, which can solve the problem that the sealing layer of the existing underground gas storage is easily damaged, resulting in poor air tightness of the gas storage.

The invention provides an underground gas storage based on a block lining structure. The underground gas storage includes:

Surrounding rocks of the cave;

A lining layer is provided on the inside of the cave wall of the surrounding rock of the cavern, and the lining layer is formed by a plurality of concrete lining blocks;

A sealing layer located inside the lining layer;

A closing component is provided at one end of the lining layer close to the sealing layer, and is used to close the opening of the structural joint between two adjacent concrete lining blocks; the length of the closing component is along the opening direction of the structural joint. adjustable.

Optionally, one end of the lining layer close to the sealing layer is provided with a plurality of receiving grooves; the number of receiving grooves and the structural joints are equal and the positions are corresponding;

The accommodation groove is used to accommodate the closure component, so that the surface of the closure component close to the sealing layer is flush with the inner surface of the lining layer.

Optionally, the closing components include:

A closing plate is provided at the seam of the structural seam and used to close the seam of the structural seam;

A telescopic structure is provided at one end of the closing plate along the opening direction of the structural joint, and is used to telescopically connect the end of the closing plate to the concrete lining block on the corresponding side.

Optionally, there are two telescopic structures, and the two telescopic structures are respectively provided at both ends of the closing plate along the opening direction of the structural slit.

Optionally, the telescopic structure includes:

An elastic member, one end of which is connected to the end of the closing plate, and the other end of which is connected to the concrete lining block on the corresponding side;

The sleeve is sleeved on the elastic member and connected to the concrete lining block on the corresponding side.

Optionally, the end of the closing plate close to the telescopic structure has a first sawtooth portion;

The telescopic structure includes:

The connecting plate has a second sawtooth portion at its end close to the closing plate, and the first sawtooth portion is engaged with the second sawtooth portion;

The first fixing member is used to fix the end of the connecting plate away from the closing plate and the concrete lining block on the corresponding side.

Optionally, the closing component also includes:

A connecting structure is provided at one end of the closing plate away from the telescopic structure, and is used to connect the end of the closing plate to the concrete lining block on the corresponding side.

Optionally, the connection structure includes:

The second fixing member is used to fix the end of the closing plate away from the connecting plate and the concrete lining block on the corresponding side.

Optionally, the underground gas storage also includes:

A shielding member is provided between the sealing layer and the closure component and covers the closure component.

Optionally, the blocking member is geotextile or geomembrane.

The beneficial effects produced by this invention include:

The underground gas storage based on the block lining structure provided by the present invention uses block concrete lining blocks to preset the position and width of the structural joints in advance, and then sets a telescopic closing component to close two adjacent blocks of concrete. The structural seams between the lining blocks can effectively ensure the sealing of the gas storage.

Description of the drawings

Figure 1 is a schematic cross-sectional structural diagram of an underground gas storage provided by an embodiment of the present invention;

Figure 2 is a schematic structural diagram of the longitudinal section of the underground gas storage structural joint provided by the embodiment of the present invention;

Figure 3 is a schematic cross-sectional structural diagram of an underground gas storage provided by another embodiment of the present invention;

Figure 4 is a schematic structural diagram of a longitudinal section of an underground gas storage structural joint provided by another embodiment of the present invention;

Figure 5 is a schematic cross-sectional structural view of an underground gas storage structural joint provided by another embodiment of the present invention.

Parts and reference number list:

1. Surrounding rock of the cavern; 2. Concrete lining block; 3. Sealing layer; 4. Structural joints; 5. Closing plate; 6. Cavity; 7. Casing; 8. Elastic parts; 9. Connecting plate; 10. The first fixing part; 11. The second fixing part; 12. The shielding part.

Detailed ways

The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

An embodiment of the present invention provides an underground gas storage based on a block lining structure, as shown in Figures 1 to 5. The underground gas storage includes:

Cave surrounding rock 1;

The lining layer is located on the inside of the cave wall of the surrounding rock 1 of the cavern. The lining layer is enclosed by a plurality of concrete lining blocks 2;

The sealing layer 3 is provided on the inside of the lining layer; the sealing layer 3 has a cavity 6 on the inside.

The sealing component is located at one end of the lining layer close to the sealing layer 3 and is used to seal the opening of the structural joint 4 between two adjacent concrete lining blocks 2; the length of the sealing component is scalable along the opening direction of the structural joint 4.

Further, a plurality of accommodation grooves are provided at one end of the lining layer close to the sealing layer 3; the number of accommodation grooves and the structural joints 4 are equal and their positions are corresponding;

The accommodating groove is used to accommodate the closing component, so that the surface of the closing component close to the sealing layer 3 is flush with the inner surface of the lining layer.

In practical applications, a concrete lining layer and sealing layer 3 are installed in an underground gas storage for compressed air energy storage. The concrete lining layer serves as the base material of the sealing layer 3 to provide a flat surface and at the same time transmit high-pressure gas pressure to the surrounding rock of the cavern 1 , the purpose of sealing layer 3 is to prevent leakage of high-pressure gas.

When the internal air pressure is as high as 10MPa or more, cracks will inevitably occur in the circumferential direction of the concrete lining layer. In order to control the location of the cracks, structural joints 4 are preset in the circumferential direction of the concrete lining layer, that is, the lining layer becomes a block concrete structure. Then, a sealing component is used to seal the structural joint 4 between two adjacent concrete lining blocks 2 to ensure the sealing of the underground gas storage.

In the present invention, the closure assembly includes:

The closing plate 5 is arranged at the opening of the structural joint 4 and is used to close the opening of the structural joint 4; in practical applications, the closing plate 5 can be a steel plate.

The telescopic structure is provided at one end of the closing plate 5 along the opening direction of the structural joint 4, and is used to telescopically connect the end of the closing plate 5 with the concrete lining block 2 on the corresponding side.

In a specific embodiment of the present invention, there are two telescopic structures, and the two telescopic structures are respectively provided at both ends of the closing plate 5 along the opening direction of the structural seam 4 .

Specifically, the telescopic structure includes:

One end of the elastic member 8 is connected to the end of the closing plate 5, and the other end is connected to the concrete lining block 2 on the corresponding side; in practical applications, the elastic member 8 can be a spring.

The sleeve 7 is sleeved on the elastic member 8 and connected to the concrete lining block 2 on the corresponding side.

Referring to Figures 1 and 2, the surface of the structural joint 4 is covered by a complete closing plate 5 (such as a steel plate) and extends to a certain length. The upper surface of the closing plate 5 is flush with the surface of the concrete lining layer to provide sealing layer 3. Flat base.

The closing plate 5 is fixed on the concrete lining on both sides of the structural joint 4 through telescopic structures on both sides. This telescopic structure is composed of a spring and a sliding sleeve 7. The sliding sleeve 7 is set on the spring. One end of the spring is connected to the end of the closing plate 5. connection, the other end is connected to the lining concrete; the sliding sleeve 7 is fixed on the surface of the lining concrete; when the sliding sleeve 7 has a bottom wall away from the closing plate 5, the other end of the spring can also be connected to the bottom wall. Under the action of high internal pressure, the lining concrete structure expands and deforms, and the structural joints 4 open. The concrete lining blocks 2 drive the springs in the telescopic structure to deform. The closing plate 5 can always completely cover the opened structural joints 4, ensuring that the gas storage is Air tightness.

During the continuous charging and deflating operation of the gas storage, the structural joint 4 opens and closes accordingly. Through the telescopic structure connecting the closing plate 5 on the surface of the structural joint 4 and the concrete lining block 2, it can adapt to the repeated deformation during the loading and unloading process. , the closing plate 5 always plays a protective role on the surface of the structural joint 4, and at the same time, together with the concrete lining block 2, provides a smooth base layer for the sealing layer 3.

In the embodiment of the present invention, a closed plate 5 is fixed on the surface of the structural joint 4 through a telescopic structure. The telescopic structure is composed of a spring and a sliding sleeve 7. The sliding sleeve 7 is set on the spring and fixed on the surface of the lining concrete; the spring is connected to Between the closed plate 5 and the concrete lining block 2. Under the repeated action of internal pressure, the structural joint 4 opens and closes, and the telescopic structure deforms accordingly. However, the position of the closing plate 5 on the surface of the structural joint 4 remains unchanged, and can completely cover the open structural joint 4, and at the same time, together with the concrete lining block 2 Provide a flat base layer for the sealing layer 3 to ensure the air tightness in the gas storage.

In another specific embodiment of the present invention, the end of the closing plate 5 close to the telescopic structure has a first sawtooth portion;

Telescopic structures include:

The connecting plate 9 has a second sawtooth portion at its end close to the closing plate 5, and the first sawtooth portion is engaged with the second sawtooth portion; in practical applications, the connecting plate 9 can be a steel plate.

The first fixing part 10 is used to fix the end of the connecting plate 9 away from the closing plate 5 and the concrete lining block 2 on the corresponding side. In practical applications, the first fixing member 10 may be a bolt, a rivet, or the like.

Furthermore, closed components also include:

The connecting structure is provided at one end of the closing plate 5 away from the telescopic structure, and is used to connect the end of the closing plate 5 with the concrete lining block 2 on the corresponding side.

Specifically, the connection structure includes:

The second fixing part 11 is used to fix the end of the closing plate 5 away from the connecting plate 9 and the concrete lining block 2 on the corresponding side. In practical applications, the second fixing member 11 may be a bolt, a rivet, or the like.

Referring to Figures 3 to 5, the surface position of the structural joint 4 is covered by two mutually embedded steel plates (i.e., the closing plate 5 and the connecting plate 9). The upper surface of the steel plate is flush with the surface of the concrete lining block 2 to provide sealing layer 3. Flat base.

Two mutually embedded steel plates are fixed on the concrete lining blocks 2 on both sides of the structural joint 4 through fasteners (such as bolts, rivets, etc.). The closing plate 5 completely covers the structural joint 4 and extends to a certain length. Under the action of high internal pressure, the lining concrete structure expands and deforms, and the structural joint 4 opens. The concrete lining block 2 drives the mutually embedded closing plate 5 and connecting plate 9 to open, but the closing plate 5 can always completely cover the open structural joint 4. , to ensure the air tightness in the gas storage.

In actual applications, underground gas storage also includes:

The shielding member 12 is provided between the sealing layer 3 and the closing component, and covers the closing component.

Specifically, the shielding member 12 may be geotextile or geomembrane.

A layer of geotextile or geomembrane is provided between the concrete lining block 2 at the structural joint 4 position and the sealing component to prevent the sealing layer 3 from entering the gap in the middle after the sealing component is stretched and opened.

In the embodiment of the present invention, two mutually embedded closing plates 5 and connecting plates 9 are fixed on both sides of the surface of the structural joint 4. The closing plate 5 completely covers the structural joint 4 and extends to a certain length. When the structural joint 4 opens under the action of internal pressure, The closing plate 5 can completely cover the open structural seam 4 to ensure the air tightness in the gas storage.

The above are only a few embodiments of the present application, and are not intended to limit the present application in any way. Although the present application is disclosed as above with preferred embodiments, they are not intended to limit the present application. Any skilled person familiar with this field, Without departing from the scope of the technical solution of this application, slight changes or modifications made using the technical content disclosed above are equivalent to equivalent implementation examples and fall within the scope of the technical solution.

Claims (10)

1. Underground gas storage based on blocking lining structure, characterized by that, underground gas storage includes:

surrounding rock of the cavern;

the lining layer is arranged on the inner side of the wall of the surrounding rock of the cavity and is formed by surrounding a plurality of concrete lining blocks;

a sealing layer provided on the inner side of the lining layer;

the sealing assembly is arranged at one end of the lining layer, which is close to the sealing layer, and is used for sealing a seam of a structural seam between two adjacent concrete lining blocks; the closing component is telescopic along the length of the opening direction of the structural joint.

2. The underground gas storage of claim 1, wherein the lining layer has a plurality of receiving slots at one end adjacent to the sealing layer; the number of the containing grooves is equal to that of the structural slits, and the positions of the containing grooves are corresponding to those of the structural slits;

the accommodating groove is used for accommodating the sealing component, so that the surface, close to the sealing layer, of the sealing component is flush with the inner surface of the lining layer.

3. A subterranean gas storage according to claim 1 or 2, wherein the closure assembly comprises:

the sealing plate is arranged at the seam of the structural seam and is used for sealing the seam of the structural seam;

the telescopic structure is arranged at one end of the sealing plate along the opening direction of the structural joint and is used for connecting the end part of the sealing plate with the concrete lining block at the corresponding side in a telescopic manner.

4. The underground gas storage of claim 3, wherein the number of the telescopic structures is two, and the two telescopic structures are respectively arranged at two ends of the sealing plate along the opening direction of the structural joint.

5. The underground gas storage of claim 3 or 4, wherein the telescoping structure comprises:

one end of the elastic piece is connected with the end part of the sealing plate, and the other end of the elastic piece is connected with the concrete lining block at the corresponding side;

and the sleeve is sleeved on the elastic piece and is connected with the concrete lining block at the corresponding side.

6. A subterranean gas storage according to claim 3, wherein the end of the closure plate adjacent to the telescoping structure has a first serration;

the telescopic structure comprises:

the end part, close to the sealing plate, of the connecting plate is provided with a second sawtooth part, and the first sawtooth part is in meshing connection with the second sawtooth part;

and the first fixing piece is used for fixing the end part, away from the sealing plate, of the connecting plate with the concrete lining block on the corresponding side.

7. The underground gas storage of claim 6, wherein the closure assembly further comprises:

and the connecting structure is arranged at one end, far away from the telescopic structure, of the sealing plate and is used for connecting the end part of the sealing plate with the concrete lining block at the corresponding side.

8. The underground gas reservoir of claim 7, wherein the connecting structure comprises:

and the second fixing piece is used for fixing the end part, far away from the connecting plate, of the closing plate with the concrete lining block on the corresponding side.

9. The underground gas reservoir of claim 1, wherein the underground gas reservoir further comprises:

and the shielding piece is arranged between the sealing layer and the closing component and covers the closing component.

10. A subterranean gas storage according to claim 9, wherein the shield is geotextile or geomembrane.