Prestress high-pressure gas storage structure of damping type block lining

Abstract

The invention belongs to the technical field of civil engineering and energy engineering, and particularly relates to a damping type block lining prestress high-pressure gas storage structure which is sequentially composed of a steel lining, lining blocks, a buffer layer and a concrete layer from inside to outside. A reinforced concrete block is adopted as a single lining block, a gap is formed between every two adjacent lining blocks, and a self-resetting damper is arranged on the circumferential joint face of every two adjacent lining blocks; prestressed tendons are pre-buried in the concrete layer, and the first prestressed tendons are arranged in the middle of the concrete layer and arranged at equal intervals in the circumferential direction. The second prestressed tendons are arranged at the end of the concrete layer in the radial direction. The third prestressed tendon 7 is arranged in the axial direction and penetrates through the capsule-shaped structure, and anchoring ribs are arranged at the two ends of the third prestressed tendon 7. According to the structure, the thickness of the steel lining is remarkably reduced, meanwhile, higher internal pressure can be borne, and the gas storage container is more reasonable in stress.

Description

Technical Field

[0001] The invention patent belongs to the field of civil engineering and energy engineering technology, and specifically, relates to a prestressed high-pressure gas storage structure with damping block lining. Background Art

[0002] In recent years, the country is vigorously building a new power system with a gradually increasing proportion of new energy. Compressed air energy storage technology has rapidly emerged due to its advantages of large energy storage scale, long discharge time, long service life, high safety, and wide comprehensive utilization of heat, cold and electricity. With the increasing rise of compressed air energy storage technology, the design and construction of underground high-pressure gas storage structures have also gradually begun. At present, the containers used to store high-pressure air are mostly ground steel tank structures or underground caverns. The former needs to consider the safety of the gas storage structure, and the latter needs to consider the stability of the gas storage structure.

[0003] For ground steel storage tanks, since they are arranged on the ground and store high-pressure air inside, if high-pressure gas leaks or even explodes, it will cause serious safety accidents and endanger personal and property safety. In order to meet safety requirements, existing steel storage tank structures generally adopt thicker steel lining design, which has high manufacturing cost and poor economic efficiency.

[0004] For underground caverns, the gas storage structure usually includes steel lining, concrete lining and primary support. The stability of the gas storage structure is the focus of the design, and it is necessary to consider the structure's ability to resist internal and external pressures, including the effects of gas storage pressure, surrounding rock pressure and groundwater pressure on the structure. Existing gas storage structures usually have problems such as uncoordinated deformation between the steel lining and the concrete lining, and fatigue damage to the gas storage structure under the cyclic load caused by the filling and discharging of high-pressure gas, which leads to the destruction of the gas storage structure or a reduction in its service life.

[0005] Therefore, it is necessary to design a universal high-pressure gas storage structure that can be used on the ground or underground. This gas storage structure takes into account both safety and stability, is more economical than ground steel storage tanks, and has better stability than underground cavern gas storage structures. Summary of the invention

[0006] In view of the problems existing in the existing steel storage tanks and underground cavern gas storage structures, the present invention proposes a prestressed high-pressure gas storage structure with damping block lining.

[0007] The damping block-lined prestressed high-pressure gas storage structure of the present invention is characterized in that it is composed of a steel lining, a lining block, a buffer layer and a concrete layer from the inside to the outside, and the steel lining and the buffer layer are capsule-shaped structures, wherein: A number of lining blocks are enclosed to form a circular column, a single lining block is made of reinforced concrete, there is a gap between adjacent lining blocks, and a self-resetting damper is arranged on the circumferential joint surface of adjacent lining blocks; Prestressed tendons are embedded in the concrete layer. The prestressed tendons are composed of at least two steel strands. Due to their different locations, they are named first prestressed tendons, second prestressed tendons and third prestressed tendons. The first prestressed tendons are arranged in the middle of the concrete layer, and several first prestressed tendons are arranged equidistantly along the circumferential direction; the second prestressed tendons are arranged radially at the end of the concrete layer; the third prestressed tendons are arranged axially and penetrate the capsule-shaped structure, and anchor ribs are arranged at both ends of the third prestressed tendons.

[0008] Specifically, the thickness of the steel lining is 20 mm to 30 mm.

[0009] Specifically, the wrap angle of the lining block is not greater than 20°, and the thickness of the lining block should not be less than 0.3m, so as to ensure the circumferential expansion and contraction performance of the lining block. The adjacent lining blocks are respectively grooved on the circumferential joint surfaces to accommodate the self-resetting damper; connecting blocks are arranged at both ends of the self-resetting damper, and the connecting blocks include a connecting plate, a fixed steel plate and a rib plate welded together, and holes corresponding to the self-resetting damper are arranged on the connecting plate, and the connecting plate and the self-resetting damper are connected by fasteners; a fixed steel plate is arranged at the bottom of the connecting plate, and a rib plate for reinforcement is arranged between the connecting plate and the fixed steel plate, and the connecting plate, the fixed steel plate and the rib plate are perpendicular to each other; anchoring ribs are arranged at the bottom of the fixed steel plate, and the anchoring ribs are fixed in the lining block. The connecting block and the self-resetting damper are connected to form a detachable structure by fasteners, which is convenient for replacing the lining block with partial damage; the self-resetting damper can adapt to the corresponding angular displacement without affecting its performance when the two adjacent lining blocks connected to it undergo expansion and contraction displacement.

[0010] Specifically, the buffer layer is polyurethane rubber with a thickness of 10 mm to 30 mm, and can withstand a certain radial displacement when the lining block undergoes telescopic displacement.

[0011] Specifically, the thickness of the concrete layer is 2m~4m. The first prestressed tendons at the same height are divided into 3-5 sections, and the multiple sections are enclosed to form a ring. Anchor ribs are set at the junction of the ends of the two sections of the first prestressed tendons, and two first prestressed tendons are set in each section; the second prestressed tendons are set at equal central angles, and anchor ribs are set at both ends of the second prestressed tendons; at least three third prestressed tendons are set, and the third prestressed tendons are arranged at equal intervals.

[0012] As a specific implementation of the present invention, when each ring of the first prestressed tendons of the same height is divided into three sections, the wrap angle of each section is 120°; the end joints of the first prestressed tendons of two adjacent layers are staggered, and the wrap angle between the end joints of the upper layer and the end joints of the lower layer is 60°.

[0013] The damping block lining prestressed high-pressure gas storage structure of the present invention significantly reduces the thickness of the steel lining. To ensure the stability of the high-pressure gas storage structure, the lining block telescopic displacement and the buffer layer greatly reduce the extrusion and damage to the concrete layer, and extend the life of the high-pressure gas storage structure under the cyclic load of charging and discharging high-pressure gas; for the gas storage container composed of steel lining and reinforced concrete, the amount of reinforced concrete is greatly reduced, and at the same time, it can withstand higher internal pressure, and is a gas storage container with more reasonable force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is a schematic diagram of the connection structure between the self-resetting damper and the lining block of the present invention.

[0016] Figure 3 It is a structural cross-sectional view of the concrete layer of the present invention.

[0017] Among them, 1-steel lining, 2-lining block, 3-buffer layer, 4-concrete layer, 5-first prestressed tendons, 6-second prestressed tendons, 7-third prestressed tendons. DETAILED DESCRIPTION

[0018] Embodiment 1: A prestressed high-pressure gas storage structure with damping block lining, characterized in that it is composed of a steel lining 1, a lining block 2, a buffer layer 3 and a concrete layer 4 from the inside to the outside, and the steel lining 1 and the buffer layer 3 are capsule-shaped structures, wherein: The thickness of steel lining 1 is 20mm~30mm; A number of lining blocks 2 are enclosed to form a circular column, a single lining block 2 is made of reinforced concrete blocks, there is a gap between adjacent lining blocks 2, and self-resetting dampers are arranged on the annular joint surfaces of adjacent lining blocks 2; connecting blocks are arranged at both ends of the self-resetting damper, the connecting blocks include a connecting plate, a fixed steel plate and a rib plate welded together, a hole corresponding to the self-resetting damper is arranged on the connecting plate, and the connecting plate is connected to the self-resetting damper by fasteners; a fixed steel plate is arranged at the bottom of the connecting plate, and a rib plate for reinforcement is arranged between the connecting plate and the fixed steel plate, and the connecting plate, the fixed steel plate and the rib plate are perpendicular to each other; an anchor rib is arranged at the bottom of the fixed steel plate, and the anchor rib is fixed in the lining block 2; The buffer layer 3 is polyurethane rubber with a thickness of 10 mm to 30 mm; The thickness of the concrete layer 4 is 2m~4m, and prestressed tendons are embedded in the concrete layer 4. The prestressed tendons are composed of at least two steel strands. Due to their different locations, they are named as the first prestressed tendon 5, the second prestressed tendon 6 and the third prestressed tendon 7. The first prestressed tendon 5 is arranged in the middle of the concrete layer 4, and several first prestressed tendons 5 are arranged equidistantly along the circumferential direction. When each ring of the first prestressed tendons 5 of the same height is divided into three sections, the wrap angle of each section is 120°; the end joints of the first prestressed tendons 5 of two adjacent layers are staggered, and the wrap angle between the end joints of the upper layer and the lower layer is 60; the second prestressed tendon 6 is radially arranged at the end of the concrete layer 4; the third prestressed tendon 7 is axially arranged and passes through the capsule-shaped structure, and anchor ribs are arranged at both ends of the third prestressed tendon 7.

Claims

1. Prestressed high-pressure gas storage structure with damping block lining, characterized by From the inside to the outside, it is composed of a steel lining (1), a lining block (2), a buffer layer (3) and a concrete layer (4). The steel lining (1) and the buffer layer (3) are capsule-shaped structures, wherein: A plurality of lining blocks (2) are enclosed to form a circular ring column, a single lining block (2) is a reinforced concrete block, there is a gap between adjacent lining blocks (2), and a self-resetting damper is arranged on the circumferential joint surface of adjacent lining blocks (2); Prestressed tendons are embedded in the concrete layer (4), and the prestressed tendons are composed of at least two steel strands. Due to their different locations, they are named as first prestressed tendons (5), second prestressed tendons (6) and third prestressed tendons (7). The first prestressed tendons (5) are arranged in the middle of the concrete layer (4), and a plurality of first prestressed tendons (5) are arranged equidistantly along the circumferential direction; the second prestressed tendons (6) are arranged at the ends of the concrete layer (4) along the radial direction; the third prestressed tendons (7) are arranged along the axial direction and penetrate the capsule-shaped structure, and anchor ribs are arranged at both ends of the third prestressed tendons (7).

2. The prestressed high-pressure gas storage structure with damping block lining according to claim 1 is characterized in that The thickness of the steel lining (1) is 20 mm to 30 mm.

3. The damping block lining prestressed high pressure gas storage structure according to claim 1, characterized in that The wrap angle of the lining block (2) is not greater than 20°, and the thickness of the lining block (2) should not be less than 0.3 m; the adjacent lining blocks (2) are respectively grooved on the circumferential joint surfaces for accommodating the self-resetting damper; connecting blocks are arranged at both ends of the self-resetting damper, the connecting blocks include a connecting plate, a fixing steel plate and a rib plate welded together, the connecting plate is provided with a hole corresponding to the self-resetting damper, and the connecting plate is connected to the self-resetting damper by a fastener; a fixing steel plate is arranged at the bottom of the connecting plate, and a rib plate for reinforcement is arranged between the connecting plate and the fixing steel plate, and the connecting plate, the fixing steel plate and the rib plate are perpendicular to each other; an anchor rib is arranged at the bottom of the fixing steel plate, and the anchor rib is fixed in the lining block (2).

4. The prestressed high-pressure gas storage structure with damping block lining according to claim 1 is characterized in that The buffer layer (3) is polyurethane rubber and has a thickness of 10 mm to 30 mm.

5. The damping block lining prestressed high pressure gas storage structure according to claim 1, characterized in that The thickness of the concrete layer (4) is 2m~4m; the first prestressed tendons (5) at the same height are divided into 3-5 sections, and the multiple sections are enclosed to form a ring; anchor ribs are arranged at the junction of the ends of the two sections of the first prestressed tendons (5), and two first prestressed tendons (5) are arranged in each section; the second prestressed tendons (6) are arranged at equal central angles, and anchor ribs are arranged at both ends of the second prestressed tendons (6); at least three third prestressed tendons (7) are arranged, and the third prestressed tendons (7) are arranged at equal intervals.

6. The damping block lining prestressed high pressure gas storage structure according to claim 5, characterized in that When each ring of the first prestressed tendons (5) at the same height is divided into three sections, the wrap angle of each section is 120°; the end joints of the first prestressed tendons (5) of two adjacent layers are staggered, and the wrap angle between the end joints of the upper layer and the end joints of the lower layer is 60°.

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