Underground high-pressure gas storage chamber sealing steel plate counter-support steel structure and construction method

Abstract

The application provides a supporting steel structure of underground high-pressure gas storage chamber sealing steel plate and a construction method. The structure is arranged between sealing heads of two chambers and comprises two supporting sections and a supporting section arranged between the two supporting sections. The two supporting sections are respectively in abutment with and detachably connected to two ends of the supporting section. The two supporting sections are respectively in abutment with sealing steel plates of the two chambers at ends away from the supporting section. The sealing steel plates of the sealing heads of the two chambers are symmetrically supported by the supporting sections and the supporting section. The supporting sections are in abutment with the sealing steel plates, and the supporting sections and the supporting section are detachably connected. The supporting sections and the supporting section are convenient to install and detach, convenient to overhaul, reusable, environmentally friendly and energy-saving. In addition, the supporting sections and the supporting section are prefabricated parts, and compared with concrete support, the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground high-pressure gas storage chamber sealing, in particular to an underground high-pressure gas storage chamber sealing steel plate counter-bracing steel structure and a construction method. BACKGROUND

[0002] Under the background of building a new energy system, compressed air energy storage has high safety, large energy storage scale, long discharge time, long service life, wide thermal, cold and electric comprehensive utilization, and other advantages, and is considered to be a large-scale new energy storage technology with broad development prospects. Since the compressed air energy storage system does not involve the combustion of fossil fuels, does not emit any harmful substances during operation, and is composed of mechanical equipment without the problem of waste equipment recycling pollution, it is highly environmentally friendly and meets the primary demand of the country to improve and protect the ecological environment.

[0003] Compressed air energy storage technology is one of the important supporting technologies for realizing large-scale consumption of new energy and building a new power system, and is an important way to promote the upgrading of China's energy structure and ensure the sustainable development of the energy and power industry. The northwest region of China is rich in photovoltaic and wind energy resources, and the hard rock strata such as granite, basalt, limestone and sandstone widely distributed in this region have good rock mass quality, high strength and large deformation modulus, which provides good engineering geological conditions for large-scale construction of compressed air energy storage underground gas storage, and can cooperate with wind and solar power generation to solve the problem of peak load shifting and stable output in the sending end power grid.

[0004] The compressed air energy storage underground artificial chamber is formed by artificial excavation and lining with a sealing layer of steel plates, and the load generated by high-pressure gas is mainly borne by the surrounding rock. In order to realize the engineering maintenance condition, a maintenance access needs to be provided at the sealing head of the compressed air energy storage underground artificial chamber, and the maintenance access should meet the requirements of personnel and small maintenance equipment entering, and has a large cross section. In order to prevent the sealing steel plate from being damaged under the action of high pressure in the hole, back support design is needed to ensure the safety of the structure. The sealing steel plate of the chamber is open behind the joint part with the maintenance access, if the load is entirely borne by the sealing steel plate itself, the sealing steel plate needs a large thickness, which is difficult to produce and process, and the stress concentration at the lap joint of the channel structure concrete is easy to cause the concrete to be crushed and sheared; if the back is poured with reinforced concrete combined with stress, when the chamber needs to be accessed for maintenance, the concrete structure needs to be chiseled, which is difficult to construct and greatly damages the structure at the sealing head. SUMMARY

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a steel plate bracing structure and construction method for sealing underground high-pressure gas storage chambers. This structure and method are tailored to the "T"-shaped maintenance passage structure of the sealing section of underground annular chambers, offering advantages such as convenient installation and structural stability. During engineering maintenance, it can be quickly dismantled and reused in sections without breaking the reinforced concrete of the sealing head. It is an environmentally friendly and economical structural type with good potential for widespread application.

[0006] To address the aforementioned problems, in a first aspect, the present invention provides a steel structure for sealing steel plates of an underground high-pressure gas storage chamber, which is arranged between the sealing heads of two chambers. The structure includes two support sections and a tensioning section arranged between the two support sections. The two support sections abut against both ends of the tensioning section and are detachably connected. The ends of the two support sections away from the tensioning section abut against the sealing steel plates of the two chambers.

[0007] The beneficial effects of this invention are as follows: By setting up support sections and tightening sections, the sealing steel plates at the sealing heads of the two chambers are symmetrically supported, ensuring stable support. The support sections and sealing steel plates are in abutment contact, and the support sections and tightening sections are detachably connected. This makes both support sections and tightening sections easy to install and disassemble, facilitating engineering maintenance, and allowing for reuse, thus being environmentally friendly and economical. Furthermore, both support sections and tightening sections are prefabricated components, which improves construction efficiency compared to using concrete supports.

[0008] Furthermore, the support section includes a first end section, a standard section, and a second end section connected in sequence. The end of the first end section away from the standard section abuts against the sealing steel plate of the chamber, and the second end section abuts against the tensioning section. At least one standard section is provided, and the first end section, the standard section, and the second end section are detachably connected.

[0009] This invention configures the support section as a first end section, a standard section, and a second end section. The number of standard sections can be determined based on the distance between the sealing steel plates of the two chambers. This allows for the prefabrication of only three structures—the first end section, the standard section, and the second end section—which improves prefabrication efficiency. All three end sections are detachable and connectable, facilitating on-site installation.

[0010] Furthermore, the first end section includes an arc-shaped steel plate, a first compartment box, and a first sealing steel plate. The arc-shaped steel plate and the first sealing steel plate are respectively disposed at both ends of the first compartment box. The arc-shaped steel plate abuts against the sealing steel plate of the chamber, and the first sealing steel plate is detachably connected to one end of the standard section.

[0011] The first compartment of the present invention helps to ensure the pressure stability of the first end section.

[0012] Furthermore, the radius of curvature of the arc-shaped steel plate is equal to the radius of curvature of the sealing steel plate of the chamber.

[0013] The arc-shaped steel plate of the present invention can be completely fitted with the sealing steel plate, which helps to reduce the pressure on the arc-shaped steel plate and the sealing steel plate while ensuring sufficient support.

[0014] Furthermore, a rubber gasket is provided between the end of the first end section away from the standard section and the sealing steel plate of the chamber.

[0015] The rubber pad of the present invention can ensure uniform force transmission.

[0016] Furthermore, the standard section includes a second compartment and second sealing steel plates disposed at both ends of the second compartment, the two second sealing steel plates being detachably connected to the first end section and the second end section respectively.

[0017] The second compartment of this invention helps to ensure the pressure stability of the standard section.

[0018] Furthermore, the second end section includes a third compartment and third sealing steel plates disposed at both ends of the third compartment. One end of the second end section is detachably connected to the standard section through the third sealing steel plate, and the other end of the second end section abuts against the tensioning section through the third sealing steel plate. A limiting member is provided on the outer side of the third sealing steel plate near the tensioning section of the second end section. The limiting member is used to limit the vertical displacement of the tensioning member.

[0019] The third compartment of the present invention helps to ensure the pressure stability of the second end section, and the installation of the tensioning component is facilitated by setting the limiting component.

[0020] Furthermore, the tensioning section includes a fourth compartment and fourth sealing steel plates disposed at both ends of the fourth compartment. The two ends of the tensioning section abut against the second end section through the fourth sealing steel plates.

[0021] The fourth compartment of the present invention helps to ensure the compressive stability of the support joint.

[0022] Furthermore, the first, second, and third sealing steel plates have the same cross-section, while the fourth sealing steel plate has a smaller cross-section than the first, second, and third sealing steel plates, thus reserving space around the periphery of the tensioning section for installing jacks. A stiffening plate connected to the third sealing steel plate is provided near one end of the tensioning section inside the third compartment, and the stiffening plate is arranged horizontally.

[0023] The first, second, and third compartments have the same cross-section, while the fourth compartment has a smaller cross-section than the first, second, and third compartments.

[0024] The stiffening plate of the present invention can prevent the third sealing steel plate from being damaged by the action of the fourth sealing steel plate with a small cross section.

[0025] Furthermore, pulleys are provided at the bottom of the first end section, the standard section, the second end section, and the support section.

[0026] The present invention facilitates the movement of the first end section, the standard section, and the second end section by setting pulleys.

[0027] Secondly, the present invention provides a construction method for a steel structure with a sealing steel plate of an underground high-pressure gas storage chamber, comprising:

[0028] S1. Install rubber pads on the surface of the arc-shaped steel plate of the first end section, move the two first end sections to the sealing steel plates of the two chambers respectively, so that the two fit tightly together, and reserve short steel bars on the straight walls on both sides of the maintenance passage, and fix the short steel bars to the first end sections.

[0029] S2. Move multiple standard sections symmetrically to the sealing steel plate end of the first end section away from the chamber, connect the standard sections to the first end section, and connect adjacent standard sections.

[0030] S3. Move the two second end sections to the end of the standard section away from the first end section, and connect the second end sections to the standard section;

[0031] S4. Arrange multiple jacks evenly between the third sealing steel plates of the two second end sections, control the multiple jacks to apply pre-tightening force synchronously, ensure that the support section axis is stressed, and after the two third sealing steel plates are opened, insert the support section.

[0032] S5. Insert a compensating steel plate between the tensioning section and the second end section, and simultaneously unload multiple jacks step by step until the tensioning section is pressurized and enters the working position, then remove the jacks.

[0033] This invention utilizes short steel bars to temporarily fix the first end section, ensuring its fixed position and preventing any impact on the axial force of the support section. By evenly arranging multiple jacks to simultaneously advance the two second end sections, the axial force of the support section is ensured, resulting in stable force distribution and reducing the risk of structural damage. Furthermore, by using a compensating steel plate to fill the gap between the support section and the second end section, the force exerted by the support section on the support section is guaranteed, thus providing support for the sealing steel plate. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the steel structure of the sealing steel plate of the underground high-pressure gas storage chamber of the present invention.

[0035] Figure 2 This is a schematic diagram of the structure of the support joint of the present invention in the maintenance passage.

[0036] Reference numerals: 1. Tensioning section; 2. First end section; 3. Standard section; 4. Second end section; 5. Sealing steel plate; 6. Inspection passage; 7. Curved steel plate; 8. Rubber pad; 9. First compartment box; 10. First sealing steel plate; 11. Second compartment box; 12. Second sealing steel plate; 13. Third compartment box; 14. Third sealing steel plate; 15. Limiting component; 16. Fourth compartment box; 17. Fourth sealing steel plate; 18. Jack; 19. Stiffening plate; 20. Pulley. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0038] like Figure 1 The image shows a side view of the steel structure supporting the sealing steel plates of the underground high-pressure gas storage chamber. This structure is positioned between the sealing heads of two chambers and includes two support sections and a clamping section 1 positioned between the two support sections. The two support sections abut against both ends of the clamping section 1 and are detachably connected. The ends of the two support sections away from the clamping section 1 abut against the sealing steel plates 5 of the two chambers. Both support sections and the clamping section 1 are in a compressed state. The support sections and the clamping section 1 achieve force balance through the force of the two symmetrical sealing steel plates 5, thereby supporting the sealing steel plates 5.

[0039] The support section includes a first end section 2, a standard section 3, and a second end section 4 connected in sequence. The end of the first end section 2 away from the standard section 3 abuts against the sealing steel plate 5 of the chamber, and the second end section 4 abuts against the tensioning section 1. At least one standard section 3 is provided. The first end section 2, standard section 3, and second end section 4 are detachably connected. In this embodiment, only one standard section 3 is provided, which is related to the spacing between the sealing steel plates 5 of the two chambers.

[0040] In this embodiment, the lengths of the first end section 2, the standard section 3, and the second end section 4 are all two meters.

[0041] The first end section 2 includes an arc-shaped steel plate 7, a first compartment 9, and a first sealing steel plate 10. The arc-shaped steel plate 7 and the first sealing steel plate 10 are respectively located at both ends of the first compartment 9. The arc-shaped steel plate 7 abuts against the sealing steel plate 5 of the chamber, and the first sealing steel plate 10 is detachably connected to one end of the standard section 3. The radius of curvature of the arc-shaped steel plate 7 is equal to the radius of curvature of the sealing steel plate 5 of the chamber, allowing the arc-shaped steel plate 7 to fit completely against the sealing steel plate 5. This ensures sufficient support while reducing the pressure on the arc-shaped steel plate 7 and the sealing steel plate 5. A rubber pad 8 is provided between the arc-shaped steel plate 7 and the sealing steel plate 5 of the chamber to ensure uniform force transmission between the sealing steel plate 5 and the arc-shaped steel plate 7.

[0042] The standard section 3 includes a second compartment 11 and second sealing steel plates 12 disposed at both ends of the second compartment 11. The two second sealing steel plates 12 are detachably connected to the first end section 2 and the second end section 4, respectively.

[0043] The second end section 4 includes a third compartment 13 and third sealing steel plates 14 disposed at both ends of the third compartment 13. One end of the second end section 4 is detachably connected to the second sealing steel plate 12 of the standard section 3 through the third sealing steel plate 14. The other end of the second end section 4 abuts against the tensioning section 1 through the third sealing steel plate 14. A limiting member 15 is provided on the outer side of the third sealing steel plate 14 near the tensioning section 1 of the second end section 4. The limiting member 15 is used to limit the vertical displacement of the tensioning member.

[0044] The tensioning section 1 includes a fourth compartment 16 and a fourth sealing steel plate 17 disposed at both ends of the fourth compartment 16. Both ends of the tensioning section 1 abut against the second end section 4 through the fourth sealing steel plate 17.

[0045] The first sealing steel plate 10, the second sealing steel plate 12, and the third sealing steel plate 14 have the same cross-section. The first compartment 9, the second compartment 11, and the third compartment 13 also have the same cross-section. The cross-section of the fourth sealing steel plate 17 is smaller than that of the first sealing steel plate 10, the second sealing steel plate 12, and the third sealing steel plate 14. The cross-section of the fourth compartment 16 is smaller than that of the first compartment 9, the second compartment 11, and the third compartment 13. Space is reserved around the periphery of the tensioning section 1 for setting up jacks 18. A stiffening plate 19 connected to the third sealing steel plate 14 is provided near one end of the tensioning section 1 inside the third compartment 13. The stiffening plate 19 is arranged horizontally. In this embodiment, there are two stiffening plates 19. The two stiffening plates 19 are flush with the upper and lower ends of the fourth compartment 16, respectively.

[0046] In this embodiment, the first sealing steel plate 10 and the second sealing steel plate 12, and the second sealing steel plate 12 and the third sealing steel plate 14 are detachably connected by bolts.

[0047] In this embodiment, the first compartment 9, the second compartment 11, the third compartment 13, and the fourth compartment 16 each include multiple horizontal steel plates and multiple vertical steel plates. The horizontal and vertical steel plates are welded together to form a compartment-type steel structure, which helps to ensure the compressive stability of the support section 1.

[0048] In this embodiment, pulleys 20 are provided at the bottom of the first end section 2, the standard section 3, the second end section 4, and the supporting section 1 to facilitate the movement of the first end section 2, the standard section 3, and the second end section 4.

[0049] In this embodiment, multiple axial force gauges are installed on the first end section 2, standard section 3, and second end section 4. These multiple axial force gauges can detect the magnitude of the force on the first end section 2, standard section 3, and second end section 4, as well as whether the force is located on the axis.

[0050] The construction method for the steel plate bracing structure sealing the underground high-pressure gas storage chamber includes:

[0051] S1. According to the construction drawings, after the sealing steel plate 5 of the high-pressure gas storage chamber is installed, the reinforced concrete of the sealing head is poured to form the maintenance passage 6.

[0052] High-pressure grouting was performed on the interface between the concrete of the sealing head and the bedrock.

[0053] Rubber pads 8 are installed on the surface of the arc-shaped steel plate 7 of the first end section 2. The two first end sections 2 are moved to the sealing steel plates 5 of the two chambers respectively, so that the two fit tightly together. Short steel bars are reserved on the straight walls on both sides of the maintenance passage 6, and the short steel bars are fixedly connected to the first end section 2.

[0054] S2. Move multiple standard sections 3 symmetrically to the end of the first end section 2 away from the sealing steel plate 5 of the chamber, and connect the standard sections 3 to the first end section 2, and connect adjacent standard sections 3.

[0055] S3. Move the two second end sections 4 to the end of the standard section 3 away from the first end section 2, and connect the second end sections 4 to the standard section 3.

[0056] S4. Arrange multiple jacks 18 evenly between the third sealing steel plates 14 of the two second end sections 4. There should be no less than eight jacks 18. Control the multiple jacks 18 to apply pre-tightening force synchronously to ensure that the support section axis is stressed. After the two third sealing steel plates 14 are opened, the distance between the two second end sections 4 is greater than the length of the tensioning section 1 by 5mm. Insert the tensioning section 1 horizontally and place the tensioning section 1 on the limiting member 15.

[0057] S5. Insert a compensation steel plate between the tensioning section 1 and the second end section 4. Multiple jacks 18 are unloaded simultaneously and in stages until the tensioning section 1 is pressurized and enters the working state. After ensuring that the tensioning section 1 and the second end section 4 are tightly pressurized without gaps and operate stably, remove the jacks 18.

[0058] The steel plate sealing structure of the underground high-pressure gas storage chamber has the advantages of convenient installation and structural stability. It can be quickly dismantled in sections during project maintenance without breaking the reinforced concrete of the sealing head. It can also be reused, making it an environmentally friendly and economical structural type.

[0059] Furthermore, in the oil and petrochemical industry, lined rock caverns (LRCs) are used for underground high-pressure natural gas storage. This is a novel high-pressure gas storage technology with enormous potential for increasing natural gas reserves and reducing storage costs. Establishing LRC underground gas storage facilities is a national necessity for energy security. The method proposed in this invention can also be used for sealing steel plate bracing in LRC underground gas storage facilities to prevent damage to the sealing steel plates, with significant results.

[0060] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A steel structure with steel plates supporting the sealing of an underground high-pressure gas storage chamber, installed between the sealing heads of two chambers, characterized in that: It includes two support sections and a tension section (1) disposed between the two support sections. The two support sections abut against both ends of the tension section (1) and are detachably connected. The ends of the two support sections away from the tension section (1) abut against the sealing steel plates (5) of the two chambers respectively. The support section includes a first end section (2), a standard section (3), and a second end section (4) connected in sequence. The end of the first end section (2) away from the standard section (3) abuts against the sealing steel plate (5) of the chamber. The second end section (4) abuts against the tensioning section (1). At least one standard section (3) is provided. The first end section (2), the standard section (3), and the second end section (4) are detachably connected. The first end section (2) includes an arc-shaped steel plate (7), a first compartment box (9), and a first sealing steel plate (10). The arc-shaped steel plate (7) and the first sealing steel plate (10) are respectively disposed at both ends of the first compartment box (9). The arc-shaped steel plate (7) abuts against the sealing steel plate (5) of the chamber. The first sealing steel plate (10) is detachably connected to one end of the standard section (3). The radius of curvature of the arc-shaped steel plate (7) is equal to the radius of curvature of the sealing steel plate (5) of the chamber; A rubber pad (8) is provided between the end of the first end section (2) away from the standard section (3) and the sealing steel plate (5) of the chamber. The standard section (3) includes a second compartment (11) and second sealing steel plates (12) set at both ends of the second compartment (11). The two second sealing steel plates (12) are detachably connected to the first end section (2) and the second end section (4) respectively. The second end section (4) includes a third compartment (13) and third sealing steel plates (14) disposed at both ends of the third compartment (13). One end of the second end section (4) is detachably connected to the standard section (3) through the third sealing steel plate (14), and the other end of the second end section (4) abuts against the support section (1) through the third sealing steel plate (14). A limiting member (15) is provided on the outside of the third sealing steel plate (14) near the end of the support section (1) of the second end section (4). The limiting member (15) is used to limit the vertical displacement of the support member. The tensioning section (1) includes a fourth compartment (16) and a fourth sealing steel plate (17) set at both ends of the fourth compartment (16). The two ends of the tensioning section (1) abut against the second end section (4) through the fourth sealing steel plate (17). The first sealing steel plate (10), the second sealing steel plate (12), and the third sealing steel plate (14) have the same cross-section. The cross-section of the fourth sealing steel plate (17) is smaller than that of the first sealing steel plate (10), the second sealing steel plate (12), and the third sealing steel plate (14), so that space is reserved around the periphery of the tensioning section (1) for setting up a jack (18). A stiffening plate (19) connected to the third sealing steel plate (14) is provided in the third compartment (13) near the end of the tensioning section (1). The stiffening plate (19) is arranged horizontally.

2. A construction method for the steel plate bracing structure for sealing the underground high-pressure gas storage chamber as described in claim 1, characterized in that, include: S1. Install rubber pads (8) on the surface of the arc-shaped steel plate (7) of the first end section (2), move the two first end sections (2) to the sealing steel plates (5) of the two chambers respectively, so that the two fit tightly together, reserve short steel bars on the straight walls on both sides of the maintenance passage (6), and fix the short steel bars to the first end section (2). S2. Move multiple standard sections (3) symmetrically to the end of the sealing steel plate (5) away from the chamber of the first end section (2), and connect the standard sections (3) with the first end section (2), and connect the adjacent standard sections (3). S3. Move the two second end sections (4) to the end of the standard section (3) away from the first end section (2) and connect the second end sections (4) to the standard section (3); S4. Arrange multiple jacks (18) evenly between the third sealing steel plates (14) of the two second end sections (4), control the multiple jacks (18) to apply pre-tightening force synchronously, ensure that the support section axis is stressed, and after the two third sealing steel plates (14) are opened, insert the support section (1). S5. Insert a compensating steel plate between the tensioning section (1) and the second end section (4), and unload multiple jacks (18) at the same time in stages until the tensioning section (1) is pressured and enters the working state, and remove the jacks (18).

Images