Evacuation structure for LNG storage tank and method of installing the same

Abstract

The application provides an evacuation structure for an LNG storage tank and a mounting method thereof, relates to the technical field of petrochemical industrial buildings, and comprises an evacuation main body and an anti-vibration wind-resistant mechanism. The anti-vibration wind-resistant mechanism comprises a shock isolation elastic slide plate support and a flexible material. The shock isolation elastic slide plate support is placed in the flexible material, and when the tank body is displaced, the shock isolation elastic slide plate support is used to drive the evacuation main body to move along the displacement direction of the tank body. The technical problem that in the prior art, due to the force difference between the LNG storage tank main body and the auxiliary elevator, the auxiliary elevator cannot timely move along the same direction with the storage tank main body, and when the shock isolation support has not been deformed, the upper steel frame structure has been greatly deformed or even damaged is solved, and the technical effect of reducing cost waste is achieved.

Description

Technical Field

[0001] This invention relates to the field of petrochemical industrial building technology, and in particular to an evacuation structure for LNG storage tanks and its installation method. Background Technology

[0002] LNG storage tanks are jacketed tanks used to store liquefied natural gas. Since LNG storage tanks are usually located outdoors, they require appropriate vibration-damping elastic sliding plate supports to better ensure their performance and achieve minimal vibration resistance under extreme conditions.

[0003] In existing technologies, the seismic isolation bearings used in LNG storage tanks are mostly lead-core rubber seismic isolation bearings or high-damping seismic isolation bearings. These seismic isolation bearings share a common characteristic: the bearings themselves have sufficiently high stiffness. To deform them, one must first overcome the stiffness of the bearings themselves. However, the structures of LNG storage tank auxiliary elevators and evacuation ladders are mostly steel frame structures with a large height-to-width ratio. When the LNG storage tank shifts, because the stiffness of the seismic isolation bearings used in the LNG storage tank is greater than the stiffness of the steel frame structure of the auxiliary elevators and evacuation ladders, there is a force difference between the LNG storage tank body and the auxiliary elevators. This prevents the auxiliary elevators from moving in the same direction as the storage tank body in time. Before the seismic isolation bearings have deformed, the upper steel frame structure has already undergone significant deformation or even been damaged, resulting in unnecessary cost waste. Summary of the Invention

[0004] The purpose of this invention is to provide an evacuation structure for LNG storage tanks and its installation method, in order to alleviate the technical problems existing in the prior art. Because the stiffness of the seismic isolation bearings used in LNG storage tanks is greater than the stiffness of the steel frame structure of the LNG storage tank auxiliary elevators and evacuation ladders, there is a force difference between the LNG storage tank body and the auxiliary elevators, which makes it impossible for the auxiliary elevators to move in the same direction with the storage tank body in time. Before the seismic isolation bearings have deformed, the upper steel frame structure has already undergone large deformation or even been destroyed, resulting in unnecessary cost waste.

[0005] In a first aspect, the evacuation structure for an LNG storage tank provided by the present invention includes an evacuation body and an anti-vibration and wind-resistant mechanism, wherein the anti-vibration and wind-resistant mechanism is installed at the bottom of the evacuation body and the evacuation body is installed on the side wall of the tank.

[0006] The earthquake-resistant and wind-resistant mechanism includes a seismic isolation elastic sliding plate support and a wind-resistant support. When the tank body is displaced, the seismic isolation elastic sliding plate support is used to drive the evacuation body to move along the displacement direction of the tank body; the wind-resistant support is used to maintain the stability of the evacuation body.

[0007] The earthquake-resistant and wind-resistant mechanism also includes a first base component and a second base component. The first base component is located above the second base component, and an evacuation body is connected to the top of the first base component.

[0008] The first base component and the second base component enclose the box body, and the box body is filled with a flexible layer. The flexible layer fills the gap between the first base component and the second base component. The seismic isolation elastic sliding plate support and the wind-resistant support are both installed in the box body, and the seismic isolation elastic sliding plate support and the wind-resistant support are installed between the first base component and the second base component.

[0009] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the earthquake-resistant and wind-resistant mechanism further includes a plurality of engineering piles, the plurality of engineering piles being cast and connected between the second foundation component and the fixed foundation.

[0010] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the upper part of the seismic isolation elastic sliding plate support is connected to the first base member by anchor bolts; and the lower part of the seismic isolation elastic sliding plate support is connected to the second base member by the anchor bolts.

[0011] In conjunction with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the height of the flexible layer is between 20mm and 50mm.

[0012] In conjunction with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the vibration isolation elastic sliding plate support includes a support portion, an upper connecting plate and a lower connecting plate, and the support portion is slidably connected between the upper connecting plate and the lower connecting plate;

[0013] The upper connecting plate is connected to the first base component via the anchor bolt, and the lower connecting plate is connected to the second base component via the anchor bolt.

[0014] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the height of the first base member above the ground is between 200mm and 1000mm.

[0015] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein: a plurality of horizontal support members are provided between the evacuation body and the tank.

[0016] In conjunction with the seventh possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the end of the evacuation body facing the tank is provided with a connection channel to the tank 10.

[0017] In conjunction with the seventh possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the evacuation body includes an elevator area and an evacuation area, and the elevator area is connected to the evacuation area.

[0018] Secondly, the present invention also provides an installation method, including the evacuation structure for LNG storage tanks described in any of the above claims, wherein the installation steps are as follows:

[0019] S1: Construct and connect multiple engineering piles to a fixed foundation; and install a second foundation component on top of the engineering piles;

[0020] S2: Install the seismic isolation elastic sliding plate support and the wind-resistant support on the top of the second base component, and according to the installation position of the seismic isolation elastic sliding plate support and the wind-resistant support, install the first base component on the top of the seismic isolation elastic sliding plate support and the wind-resistant support; and pour flexible material into the gap of the box body enclosed between the first base component and the second base component.

[0021] S3: Install a horizontal support on the outer wall of the tank, and install the evacuation body between the tank and the first base component through the horizontal support.

[0022] The evacuation body of this invention brings the following beneficial effects: It employs an evacuation body and an earthquake-resistant and wind-resistant mechanism, with the mechanism installed at the bottom of the evacuation body and the evacuation body installed on the side wall of the tank. The earthquake-resistant and wind-resistant mechanism includes a seismic isolation elastic sliding plate support, a wind-resistant support, a first base component, and a second base component. The first base component is located above the second base component, and the top of the first base component is connected to the evacuation body. Furthermore, the first and second base components enclose a box capable of accommodating the seismic isolation elastic sliding plate support and the wind-resistant support. A flexible layer is filled inside the box, filling the gap between the first and second base components. The seismic isolation elastic sliding plate support and the wind-resistant support are installed between the first and second base components. Through the cooperation between the seismic isolation elastic sliding plate support and the box containing the flexible layer, during an earthquake, the seismic isolation elastic sliding plate support can overcome its own friction and slide, allowing the evacuation body to adapt to different terrains. The design incorporates features such as the tank's own deformation requirements and synchronous movement, ensuring that the seismic isolation elastic sliding plate supports do not slip during non-earthquake conditions due to their horizontal stiffness. This satisfies the deformation requirements of the evacuation structure, allowing the seismic isolation elastic sliding plate supports to drive the evacuation structure along the tank's displacement direction. Simultaneously, to further enhance the tank's connection stability during displacement, wind-resistant supports can be installed to improve the stability of the evacuation structure. This addresses the technical problem in existing technologies where the stiffness of the seismic isolation supports used in LNG storage tanks exceeds the stiffness of the steel frame structure of the LNG storage tank's auxiliary elevators and evacuation ladders. This results in a force difference between the LNG storage tank and the auxiliary elevators, preventing the auxiliary elevators from moving in the same direction as the tank in a timely manner. Consequently, the upper steel frame structure may deform significantly or even fail before the seismic isolation supports deform, leading to unnecessary cost waste. This design achieves the technical effect of improving equipment reliability.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the external structure of an evacuation structure for an LNG storage tank provided in an embodiment of the present invention.

[0026] Figure 2This is a front view of the earthquake-resistant and wind-resistant mechanism in the evacuation structure for an LNG storage tank provided in an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the outer side of the earthquake-resistant and wind-resistant mechanism in the evacuation structure for an LNG storage tank provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection structure between the evacuation body and the tank body in the evacuation structure for an LNG storage tank provided in an embodiment of the present invention.

[0029] Figure 5 This is a top view of the evacuation body and the tank in an auxiliary elevator for an LNG storage tank, provided as an embodiment of the present invention.

[0030] Icons: 10-Tank body; 100-Evacuation main body; 110-Horizontal support component; 120-Elevator area; 130-Evacuation area; 140-Connecting passage; 200-Earthquake and wind-resistant mechanism; 210-First foundation component; 220-Second foundation component; 230-Seismic isolation elastic sliding bearing; 240-Engineering pile; 250-Flexible layer; 260-Wind-resistant bearing. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Example 1

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the evacuation structure and its installation method for LNG storage tanks provided in this embodiment of the invention include an evacuation body 100 and an anti-vibration and wind-resistant mechanism 200. The anti-vibration and wind-resistant mechanism 200 is installed at the bottom of the evacuation body 100, and the evacuation body 100 is installed on the side wall of the tank body 10.

[0036] The earthquake-resistant and wind-resistant mechanism 200 includes a seismic isolation elastic sliding plate support 230 and a wind-resistant support 260. When the tank body 10 is displaced, the seismic isolation elastic sliding plate support 230 is used to drive the evacuation body 100 to move along the displacement direction of the tank body 10; the wind-resistant support 260 is used to maintain the stability of the evacuation body 100.

[0037] The earthquake-resistant and wind-resistant mechanism 200 also includes a first base component 210 and a second base component 220. The first base component 210 is located above the second base component 220, and the top of the first base component 210 is connected to the evacuation body 100.

[0038] The first base component 210 and the second base component 220 enclose the box body, and the box body is filled with a flexible layer 250. The flexible layer 250 fills the gap between the first base component 210 and the second base component 220. The seismic isolation elastic sliding plate support 230 and the wind-resistant support 260 are both installed in the box body, and the seismic isolation elastic sliding plate support 230 and the wind-resistant support 260 are installed between the first base component 210 and the second base component 220.

[0039] The system employs an evacuation body 100 and an earthquake-resistant and wind-resistant mechanism 200. The earthquake-resistant and wind-resistant mechanism 200 is installed at the bottom of the evacuation body 100, and the evacuation body 100 is installed on the side wall of the tank 10. The earthquake-resistant and wind-resistant mechanism 200 includes a seismic isolation elastic sliding plate support 230, a wind-resistant support 260, a first base component 210, and a second base component 220. The first base component 210 is located above the second base component 220, and the top of the first base component 210 is connected to the evacuation body 100. This encloses the space capable of... The enclosure houses the seismic isolation elastic sliding plate bearing 230 and the wind-resistant bearing 260. A flexible layer 250 is filled inside the enclosure, filling the gap between the first base member 210 and the second base member 220. The seismic isolation elastic sliding plate bearing 230 and the wind-resistant bearing 260 are installed between the first base member 210 and the second base member 220. Through the cooperation between the seismic isolation elastic sliding plate bearing 230 and the enclosure containing the flexible layer 250, during an earthquake, the seismic isolation elastic sliding plate bearing 230 can overcome its own friction and... The sliding mechanism allows the evacuation body 100 to adapt to the deformation of the tank 10 and move synchronously with it. In non-earthquake situations, the seismic isolation elastic sliding plate support 230 relies on its own horizontal stiffness to prevent slippage, thus meeting the deformation requirements of the evacuation body 100. This allows the seismic isolation elastic sliding plate support 230 to drive the evacuation body 100 to move along the displacement direction of the tank 10. Simultaneously, to further solidify the connection stability of the tank 10 during displacement, workers can improve the stability of the evacuation body 100 by setting up wind-resistant supports 260. This alleviates the technical problem in existing technologies where the stiffness of the seismic isolation support type used in LNG storage tanks is greater than the stiffness of the steel frame structure of the LNG storage tank's auxiliary elevators and evacuation ladders. This results in a force difference between the LNG storage tank body and the auxiliary elevators, preventing the auxiliary elevators from moving in the same direction with the storage tank body in a timely manner. Furthermore, it causes significant deformation or even damage to the upper steel frame structure before the seismic isolation support has deformed, leading to unnecessary cost waste. This mechanism achieves the technical effect of improving equipment reliability.

[0040] It should be noted that the connection strength coefficient between the wind-resistant support 260 and the evacuation body 100 can be set according to the actual installation position of the tank 10.

[0041] Furthermore, the earthquake-resistant and wind-resistant mechanism 200 also includes a first foundation component 210, a second foundation component 220 and a number of engineering piles 240. The first foundation component 210 is located above the second foundation component 220, and the top of the first foundation component 210 is connected to the evacuation body 100.

[0042] The first foundation component 210 and the second foundation component 220 enclose the box body, which is filled with flexible material; the seismic isolation elastic sliding plate bearing 230 is installed inside the box body and between the first foundation component 210 and the second foundation component 220; a number of engineering piles 240 are cast and connected between the second foundation component 220 and the fixed foundation.

[0043] The first foundation component 210 and the second foundation component 220 are both raft structures. The first foundation component 210 and the second foundation component 220 form a box structure, which can fully utilize the bearing capacity of the foundation and adjust uneven settlement, while also making full use of the limited space. The second foundation component 220 is rigidly connected to the bottom engineering pile 240. The first foundation component 210 is provided with an assembly groove that is adapted to the evacuation body 100, and the assembly groove is used to connect and support the evacuation body 100.

[0044] It should be noted that the seismic isolation elastic sliding plate bearing 230 can be installed in the box formed by the first foundation component 210 and the second foundation component 220 by means of threaded connection, welding, etc. At the same time, a number of engineering piles 240 are cast and connected between the second foundation component 220 and the fixed foundation to improve the installation strength of the second foundation component 220.

[0045] Furthermore, the upper part of the seismic isolation elastic sliding plate bearing 230 is connected to the first base member 210 by anchor bolts; the lower part of the seismic isolation elastic sliding plate bearing 230 is connected to the second base member 220 by anchor bolts; the height of the flexible layer is between 20mm and 50mm.

[0046] Anchor bolt connections have strong tensile strength, and at the same time, they have a simple structure, are easy to install, and reduce the labor intensity of on-site construction workers.

[0047] It should be noted that the enclosure may also be provided with multiple filling pipes, with flexible material filling the filling pipes, and the upper part of the vibration isolation elastic sliding plate support 230 is connected to the first base component 210 through the filling pipes; the lower part of the vibration isolation elastic sliding plate support 230 is connected to the second base component 220 through the filling pipes.

[0048] Furthermore, the height of the filling pipe is between 20mm and 50mm.

[0049] The filling pipes are arranged opposite each other inside the box, and the gaps between them can be determined according to the site environment and the relevant mechanical data collected. At the same time, the upper part of the seismic isolation elastic sliding plate support 230 is connected to the first base component 210 through the filling pipe; the lower part of the seismic isolation elastic sliding plate support 230 is connected to the second base component 220 through the filling pipe, so that the upper base component and the lower base component can achieve a flexible connection. The height of the filling pipe is between 20mm and 50mm to meet the connection strength of the seismic isolation elastic sliding plate support 230. At the same time, in the event of an earthquake, the seismic isolation elastic sliding plate support 230 can be effectively separated, so that the evacuation body 100 and the tank 10 can be displaced in the same direction.

[0050] It should be noted that flexible materials can include asphalt hemp fiber, polystyrene board, polyvinyl chloride foam board, polysulfide sealant, polyurethane sealant, etc.

[0051] Furthermore, the seismic isolation elastic sliding plate support 230 includes a support part, an upper connecting plate and a lower connecting plate, with the support part slidably connected between the upper connecting plate and the lower connecting plate;

[0052] The upper connecting plate is connected to the first base component 210 through a filling pipe, and the lower connecting plate is connected to the second base component 220 through a filling pipe.

[0053] Furthermore, the height of the first base component 210 above the ground is between 200mm and 1000mm.

[0054] The seismic isolation elastic sliding plate bearing 230 is a support part and can adopt a structure such as an elastic sliding panel that can both transmit torque and generate lateral sliding. In this embodiment, both the upper connecting plate and the lower connecting plate are steel plate structures with anchor bolts. The upper connecting plate is connected to the first base member 210 by anchor bolts, and the lower base member and the second base member 220 are bolted together.

[0055] The wind-resistant bearing 260 is a cylindrical elastic steel structure with a weakened central section. Under a predetermined earthquake, it can shear along the weakened central section, allowing the seismic isolation elastic sliding plate bearing 230 to slide with the displacement of the LNG storage tank. Under wind load, it ensures that the weakened central section is not sheared, thus ensuring the stability of the LNG storage tank evacuation structure. Furthermore, multiple horizontal support members 110 are provided between the evacuation main body 100 and the tank body 10.

[0056] In this embodiment, the horizontal support 110 is a steel structure, which is welded to the iron parts embedded in the outer wall of the tank body 10 to form a rigid connection between the evacuation body 100 and the tank body 10.

[0057] Furthermore, the end of the evacuation body 100 facing the tank 10 is provided with a connection channel 140 to the top of the tank 10.

[0058] The connecting passage 140 facilitates maintenance work by production personnel along the evacuation body 100 to the top area of ​​the tank 10, and also facilitates timely evacuation of production personnel located in the top area of ​​the tank 10 to the ground in case of an emergency. Furthermore, the end of the evacuation body 100 facing the tank 10 is curved.

[0059] The curved end of the evacuation body 100 facing the tank 10 ensures a tight fit between the evacuation body 100 and the outer wall of the tank 10, and a smooth connection.

[0060] Furthermore, the evacuation entity 100 includes an elevator area 120 and an evacuation area 130, with the elevator area 120 and the evacuation area 130 being connected.

[0061] The elevator area 120 can be equipped with elevator machine rooms, elevator shafts, elevator pits and other functional areas along the main evacuation area 100. The evacuation area 130 is equipped with an integrated evacuation staircase, which is connected to each functional floor of the elevator area 120 to reduce the risk of earthquakes and facilitate the evacuation of staff.

[0062] Secondly, the present invention also provides a method for installing an auxiliary elevator, including the evacuation structure for an LNG storage tank described above, wherein the installation steps are as follows:

[0063] S1: Cast and connect multiple engineering piles 240 to a fixed foundation; and install the second foundation component 220 on top of the engineering piles 240;

[0064] S2: Install the seismic isolation elastic sliding plate support 230 and the wind-resistant support 260 on the top of the second base component 220, and according to the installation position of the seismic isolation elastic sliding plate support 230 and the wind-resistant support 260, install the first base component 210 on the top of the seismic isolation elastic sliding plate support 230 and the wind-resistant support 260; and pour flexible material into the box enclosed between the first base component 210 and the second base component 220.

[0065] S3: Install a horizontal support 110 on the outer wall of the tank 10, and install the evacuation body 100 between the tank 10 and the first base component 210 through the horizontal support 110.

[0066] The embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An evacuation structure for an LNG storage tank, characterized by, The device comprises an evacuation body (100) and a shockproof windproof mechanism (200), the shockproof windproof mechanism (200) is installed at the bottom of the evacuation body (100), and the evacuation body (100) is installed on the side wall of the tank body (10); The shockproof windproof mechanism (200) comprises a shock isolation elastic slide support (230) and a windproof support (260), when the tank body (10) is displaced, the shock isolation elastic slide support (230) is used to drive the evacuation body (100) to move along the displacement direction of the tank body (10); and the windproof support (260) is used to keep the stability of the evacuation body (100); The shockproof windproof mechanism (200) further comprises a first base member (210) and a second base member (220), the first base member (210) is located at the upper part of the second base member (220), and the top of the first base member (210) is connected with the evacuation body (100); The first base member (210) and the second base member (220) enclose a box, and the box is filled with a flexible layer (250), the flexible layer (250) is filled in the gap enclosed by the first base member (210) and the second base member (220), and the shock isolation elastic slide support (230) and the windproof support (260) are installed in the box, and the shock isolation elastic slide support (230) and the windproof support (260) are installed between the first base member (210) and the second base member (220); The windproof support (260) is a cylindrical elastic steel structure with a weakened middle part, which can be sheared at the weakened middle part under a predetermined earthquake action, so that the shock isolation elastic slide support (230) slides with the displacement of the LNG storage tank; A plurality of filling pipes are arranged in the box, and a flexible material is filled in the filling pipes.

2. The evacuation structure for an LNG storage tank according to claim 1, characterized by, The shockproof windproof mechanism (200) further comprises a plurality of engineering piles (240), and the plurality of engineering piles (240) are connected between the second base member (220) and the fixed foundation by pouring.

3. The evacuation structure for an LNG storage tank according to claim 1, characterized by, The upper part of the shock isolation elastic slide support (230) of the box is connected to the first base member (210) through an anchor bolt, and the lower part of the shock isolation elastic slide support (230) is connected to the second base member (220) through the anchor bolt.

4. The evacuation structure for an LNG storage tank according to claim 3, characterized by, The height of the flexible layer (250) is between 20mm and 50mm.

5. The evacuation structure for an LNG storage tank according to claim 3, characterized by, The shock isolation elastic slide support (230) comprises a support part, an upper connecting plate and a lower connecting plate, and the support part is slidingly connected between the upper connecting plate and the lower connecting plate; The upper connecting plate is connected to the first base member (210) through the anchor bolt, and the lower connecting plate is connected to the second base member (220) through the anchor bolt.

6. The evacuation structure for an LNG storage tank according to claim 2, characterized by, The height of the first base member (210) above the ground is between 200mm and 1000mm.

7. The evacuation structure for an LNG storage tank according to claim 1, characterized by, A plurality of horizontal support members (110) are arranged between the evacuation body (100) and the tank body (10).

8. The evacuation structure for an LNG storage tank according to claim 7, characterized by, The evacuation body (100) is provided with a connecting channel (140) at the end of the tank body (10).

9. The evacuation structure for an LNG storage tank according to claim 7, characterized by, The evacuation body (100) comprises an elevator area (120) and an evacuation area (130), and the elevator area (120) is connected with the evacuation area (130).

10. A method of mounting, characterized by: The evacuation structure for LNG storage tank according to any one of claims 1-9, comprising the following steps: S1: connecting a plurality of engineering piles (240) to the fixed foundation by pouring, and installing a second base member (220) on the top of the engineering piles (240); S2: installing an isolation elastic sliding plate support (230) on the top of the second base member (220), and installing a first base member (210) on the top of the isolation elastic sliding plate support (230) according to the installation position of the isolation elastic sliding plate support (230); and pouring flexible material into the box enclosed between the first base member (210) and the second base member (220); S3: installing a horizontal support member (110) on the outer wall of the tank body (10), and installing an evacuation body (100) between the tank body (10) and the first base member (210) through the horizontal support member (110).

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