CN113174989B - Inner tank and outer tank separated type LNG liquid storage tank shock insulation system and construction method thereof - Google Patents
Inner tank and outer tank separated type LNG liquid storage tank shock insulation system and construction method thereof Download PDFInfo
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- CN113174989B CN113174989B CN202110467321.2A CN202110467321A CN113174989B CN 113174989 B CN113174989 B CN 113174989B CN 202110467321 A CN202110467321 A CN 202110467321A CN 113174989 B CN113174989 B CN 113174989B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/38—Foundations for large tanks, e.g. oil tanks
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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Abstract
The invention provides an inner tank and outer tank separated type LNG liquid storage tank shock insulation system and a construction method thereof, which are used for eliminating adverse effects on an inner tank caused by the swing effect of the outer tank under the action of an earthquake. On the basis of the full-capacity LNG liquid storage tank, the rigid connection between the inner tank and the outer tank is cancelled, so that the adverse effect of the swing effect of the outer tank on the inner tank under the action of an earthquake is eliminated; adopt the friction pendulum to subtract isolation bearing and carry out the shock insulation design to outer jar, this support can undertake the pulling force that produces because of jar body effect of swaying, can also realize the two-way shock insulation that subtracts of level, adopts the friction pendulum support to carry out the shock insulation design to inner tank, can effectively reduce the dynamic response of the inner tank jar body and stock solution.
Description
Technical Field
The invention belongs to the field of engineering foundation shock insulation, and relates to an inner tank and outer tank separated type LNG liquid storage tank shock insulation system and a construction method thereof.
Background
The super-huge Liquefied Natural Gas (LNG) storage tank is used for storing liquefied natural gas at the temperature of 162 ℃ below zero, the yield and trade volume of the world liquefied natural gas are rapidly increased since the 70 s of the 20 th century, the LNG storage tank in a receiving station in the coastal region is continuously developed towards the large and super-huge capacity direction, and the capacity of the largest single storage tank can reach 20 multiplied by 10 4 m 3 . With the increase of the volume scale of the liquid storage tank, the damage of the liquid storage tank under the action of an earthquake brings about significant economic loss and environmental pollution, even threatens the life safety of human beings, and the safety of the liquid storage tank in use becomes more important. The full-capacity LNG liquid storage tank has good integrity, and when liquid in the inner tank leaks, the outer tank can still continuously store the liquid and keep good air tightness.
The traditional shock insulation technology is that a laminated rubber support or a friction pendulum support is arranged between the top surface of a high pile foundation and the lower bottom surface of a bearing platform, and an inner tank is placed on the bearing platform. Because the outer tank and the bearing platform are fixedly connected into a whole, the swinging effect generated under the action of an earthquake can be transmitted to the inner tank, and the inner tank is adversely affected. In addition, the traditional laminated rubber support and the friction pendulum support cannot bear the tensile force caused by the swing effect of the outer tank, and even the support can be damaged due to failure under the action of the tensile force. Moreover, when the liquid storage tank encounters rare earthquakes or near-fault earthquakes with large ground displacement, the displacement of the shock insulation layer may exceed the limit deformation of the shock insulation support, so that the shock insulation support is damaged.
The patent CN104032766A discloses an LNG liquid storage tank shock insulation layer, which is used for high pile foundation shock insulation adapting to the condition that the lower part of an LNG liquid storage tank needs ventilation to remove cold air, and comprises a plurality of reaction walls, a plurality of sliding supports, a plurality of laminated rubber supports and a plurality of viscous dampers, wherein the sliding supports are respectively and fixedly connected with the lower bottom surface of a tank bottom plate of the LNG liquid storage tank and the top surface of a pile foundation, the laminated rubber supports are respectively and fixedly connected with the lower bottom surface of the tank bottom plate and the top surface of the reaction walls, and two ends of the viscous dampers are respectively hinged on the lower surface of the tank bottom plate and vertical surfaces of the reaction walls through spherical hinge supports; this LNG liquid storage pot shock insulation layer causes the great level of liquid storage pot to shift and vertical vibration all has fine adaptability to the earthquake, can reduce the earthquake response of the jar body and the pulse pressure of stock solution by a wide margin, convection action and rock wave height, thereby can alleviate the change of stock solution volume in the liquid storage pot to the influence of final shock insulation effect, can resist the uncertain future earthquake of magnitude of vibration well, however, it has viscous damper long-term stability in use relatively poor, support itself can't bear vertical pulling force, and the seismic action under the outer tank subsides along with the foundation soil and takes place to sway the effect and produce the not enough of adverse effect to inner tank major structure.
Disclosure of Invention
The invention aims to overcome the problems and provide an inner tank and outer tank separated type LNG liquid storage tank shock insulation system and a construction method thereof, wherein the inner tank and outer tank separated type LNG liquid storage tank shock insulation system can eliminate the adverse effect of a swing effect on an inner tank and can improve the safety performance of a shock insulation support.
The purpose of the invention is realized by the following technical scheme:
an inner tank and outer tank separated type LNG liquid storage tank shock insulation system comprises an inner tank bearing platform used for bearing an inner tank of an LNG liquid storage tank, an outer tank bearing platform used for bearing an outer tank of the LNG liquid storage tank, a friction pendulum shock insulation support, a friction pendulum support, a heat insulation sealing ring and a pile foundation, wherein the inner tank bearing platform and the outer tank bearing platform are arranged at intervals, and the heat insulation sealing ring is filled between the gap between the inner tank bearing platform and the outer tank bearing platform; the pile foundation is arranged at the bottoms of the inner tank bearing platform and the outer tank bearing platform and supports the inner tank bearing platform and the outer tank bearing platform; the friction pendulum vibration reduction and isolation support is arranged between the outer tank bearing platform and the pile foundations, and the friction pendulum support is arranged between the inner tank bearing platform and the pile foundations.
Further, adiabatic sealing washer closely fills between outer jar cushion cap and the inner tank cushion cap, adiabatic sealing washer comprises welt, elastic felt, perlite, elastic felt and welt in proper order.
Further, the inner tank cushion cap is connected with the inner tank anchor, the jar wall of inner tank with fill the pearlite between the jar wall of outer jar, inner tank jar wall is placed on the gird to through anchor subassembly and gird fixed connection.
Further, the tank bottom of the inner tank to the inner tank bearing platform sequentially comprise from top to bottom: the tank bottom of inner tank, fill up sand layer, foam glass brick, fill up sand layer, secondary bottom plate, foam glass brick and inner tank cushion cap.
Furthermore, the tank wall of the outer tank is fixedly connected with the outer tank bearing platform integrally, and a secondary bottom plate and a foam glass brick form a hot corner protection at a corner. The secondary bottom plate can contain leaked liquid, the outer tank is prevented from generating extremely high temperature stress due to temperature difference between low-temperature liquid and the tank body, the laid multilayer foam glass brick has the effects of heat preservation and heat insulation, and the influence of the external environment is effectively reduced.
Further, the pile foundations are arranged in three ways, wherein the first way is arranged below the outer tank bearing platform and is arranged at equal intervals along the circumferential direction of the outer tank bearing platform to form peripheral pile groups; the second type of pile is arranged below the inner tank bearing platform and is equidistantly arranged along the circumferential direction of the edge of the inner tank bearing platform to form inner side pile groups; the third type is also arranged below the inner tank bearing platform and is longitudinally and transversely arranged at equal intervals in a range enclosed by the inner side pile groups to form middle pile group.
Furthermore, the friction pendulum vibration reduction and isolation support consists of a friction pendulum vibration reduction and isolation support upper support plate, a friction pendulum vibration reduction and isolation support upper wear-resistant sheet, a spherical crown body, a friction pendulum vibration reduction and isolation support lower wear-resistant sheet, a friction pendulum vibration reduction and isolation support lower support plate and a friction anti-pulling sheet,
the both ends of friction anti-floating piece respectively through the bolt with the vibration isolation bearing upper bracket board is subtracted to the friction pendulum and vibration isolation bearing undersetting board is connected to the friction pendulum, the friction pendulum subtract vibration isolation bearing upper bracket board through the bolt with pre-buried steel sheet in the outer tank cushion cap is connected, the friction pendulum subtract vibration isolation bearing undersetting board through the bolt with the pile foundation is connected.
Different from traditional friction pendulum support, the setting up of the anti piece of pulling out of friction makes the support can bear certain vertical pulling force, effectively reduces the phenomenon of swaing of outer jar, prevents that the outer jar from taking place holistic toppling and destroying. In addition, the friction anti-pulling sheet can also have the friction energy consumption effect, and the overall energy consumption capability of the support is improved. When the shearing force borne by the support is larger than the static friction force of the sliding block, the upper support plate and the lower support plate slide to drive the friction anti-pulling sheet to move, so that the friction energy consumption capability of the support is improved, and the hysteresis curve of the support is increased, thereby effectively reducing the dynamic response of the outer tank; when the liquid storage tank encounters rare earthquakes or near-fault earthquakes with large ground displacement, the friction anti-pulling sheet is arranged to facilitate displacement response of the control structure under the earthquakes, so that displacement deformation of the shock insulation support is reduced, and safety of the storage tank under the earthquakes is improved.
Furthermore, the friction pendulum support consists of a friction pendulum upper support plate, a friction pendulum upper spherical surface sliding plate, a friction pendulum double-spherical surface sliding block, a friction pendulum lower spherical surface sliding plate and a friction pendulum lower support plate; the friction pendulum upper support plate is connected with a pre-buried steel plate in the inner tank bearing platform through a bolt, and the friction pendulum lower support plate is connected with the pile foundation through a bolt.
When the shearing force applied to the support is greater than the static friction force of the sliding block, the upper support plate and the lower support plate slide, part of the seismic energy input into the inner tank is isolated, the dynamic hydraulic force, the base shearing force, the overturning bending moment and the tank wall stress applied to the inner tank are effectively reduced, and the damping effect of the support is fully exerted.
Furthermore, wear-resisting plates are arranged on the double-spherical-surface sliding blocks of the friction pendulum, and coatings with different friction coefficients are arranged on the spherical sliding plates, so that the double-spherical-surface sliding block is suitable for liquid storage tank structures with different shock insulation requirements.
A construction method of an inner tank and outer tank separated type LNG liquid storage tank shock insulation system comprises the following steps:
firstly, fixing a friction pendulum support into a whole by adopting a positioning device, and respectively connecting the friction pendulum support with a pile foundation and an inner tank bearing platform;
secondly, fixing the friction pendulum vibration reduction and isolation support into a whole by adopting a positioning device, and respectively connecting the friction pendulum vibration reduction and isolation support with the pile foundation and the outer tank bearing platform;
and thirdly, after the construction of the tank body is finished, the support positioning device is dismounted.
Compared with the prior art, the invention has the following beneficial effects:
1. the inner tank bearing platform and the outer tank bearing platform of the LNG liquid storage tank are independently arranged and are not connected with each other, so that the adverse effect of the swing effect of the outer tank on the inner tank under the action of an earthquake is eliminated;
2. the friction pendulum vibration reduction and isolation support is arranged on the lower bottom surface of the outer tank bearing platform and the top surface of the pile foundation, has a horizontal bidirectional vibration reduction effect, can bear tension force generated by a tank body swinging effect, greatly reduces the dynamic response of the outer tank, and can also have a friction energy consumption effect by the friction anti-pulling sheet, so that the overall energy consumption capability of the support is improved;
3. the lower bottom surface of the inner tank bearing platform and the top surface of the pile foundation are provided with the friction pendulum support, and when the horizontal shearing force applied to the support is greater than the static friction force of the friction pendulum support, the support drives the inner tank and the inner tank bearing platform to slide together, so that the seismic response of the inner tank and the pulse pressure of the stored liquid are effectively reduced.
Drawings
Fig. 1 is a schematic elevation view of an LNG storage tank seismic isolation layer in embodiment 1 of the present invention;
fig. 2 is a schematic plan view of a bearing platform of an LNG storage tank in embodiment 1 of the present invention;
fig. 3 is a schematic view of an adiabatic gasket of an LNG storage tank according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the installation of the friction pendulum seismic mitigation and isolation bearing in embodiment 1 of the present invention;
FIG. 5 is a schematic view showing the installation of a friction pendulum support in embodiment 1 of the present invention;
in the figure, 1-outer tank, 2-inner tank, 3-inner tank bearing platform, 4-outer tank bearing platform, 5-pile foundation, 6-friction pendulum vibration reduction and isolation bearing, 7-friction pendulum bearing, 8-secondary bottom plate, 9-ring beam, 10-foam glass brick, 11-perlite, 12-heat insulation sealing ring, 13-friction pendulum vibration reduction and isolation bearing upper support plate, 14-friction pendulum vibration reduction and isolation bearing upper wear-resistant sheet, 15-spherical crown body, 16-friction pendulum vibration reduction and isolation bearing lower wear-resistant sheet, 17-friction pendulum vibration reduction and isolation bearing lower support plate, 18-friction pulling-resistant sheet, 19-friction pendulum upper support plate, 20-friction pendulum upper spherical sliding plate, 21-friction pendulum double spherical sliding plate, 22-friction pendulum lower spherical sliding plate, 23-friction pendulum lower support plate, 24-steel plate pre-embedded, 25-sand cushion layer, 26-lining plate and 27-elastic felt.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way.
The embodiment provides an interior outer tank disconnect-type LNG liquid storage pot shock insulation system, as shown in fig. 1-3, including outer jar 1, inner tank 2, outer jar cushion cap 4, inner tank cushion cap 3, adiabatic sealing washer 12 and pile foundation 5, the basic form of this LNG storage pot is high pile foundation, and pile foundation cushion cap is located above the ground. Inner tank cushion cap 3 is circular, and outer tank cushion cap 4 is the ring, and both are each other not continuous, make inner and outer jar integrated into one piece, and the effect of swaying that has effectively avoided outer jar 1 to produce under the earthquake action produces adverse effect to inner tank 2.
The heat insulation material is filled between the inner tank bearing platform 3 and the outer tank bearing platform 4 to form a heat insulation sealing ring 12, and the specific construction method comprises the following steps: before the bearing platform is poured, a circle of heat insulation sealing ring 12 consisting of perlite 11, a lining plate 26 and an elastic felt 27 is filled on a template in advance, the lining plate 26, the elastic felt 27, the perlite 11, the elastic felt 27 and the lining plate 26 are sequentially arranged on the sealing ring from outside to inside, materials are tightly compacted, the sealing ring can be directly used as a template for separating an inner tank bearing platform from an outer tank bearing platform, and the inner tank bearing platform 3 and the outer tank bearing platform 4 can be poured after the sealing ring is filled.
As shown in fig. 1-3, perlite 11 is filled between the tank wall of the inner tank 2 and the tank wall of the outer tank 1, the tank wall of the inner tank 2 is placed on a ring beam 9 and is fixedly connected with the ring beam 9 through an anchoring assembly, and the tank bottom of the inner tank 2, a sand cushion layer 25, a foam glass brick 10, a sand cushion layer 25, a secondary bottom plate 8, a foam glass brick 10 and the inner tank cushion 3 are sequentially arranged from top to bottom between the tank bottom of the inner tank 2 and the inner tank cushion 3.
The 1 jar wall of outer jar and the whole fixed connection of outer jar cushion cap 4, the corner is protected by secondary bottom plate 8 and foam glass brick 10 formation heat angle, and secondary bottom plate 8 can hold the liquid of leaking to prevent that the temperature difference between cryogenic liquids and the jar body from making outer jar produce very high temperature stress, the multilayer foam glass brick 10 of laying plays the thermal-insulated effect that keeps warm, effectively reduces external environment's influence.
As shown in fig. 1-3, the pile foundation 5 is located below the bearing platform, and the pile foundation 5 is divided into three arrangement modes, wherein the first type is arranged below the outer tank bearing platform 4 and is equidistantly arranged along the circumferential direction of the outer tank bearing platform 4 to form peripheral pile groups; the second type is arranged below the inner tank bearing platform 3 and is equidistantly arranged along the circumferential direction of the edge of the inner tank bearing platform 3 to form inner side grouped piles; the third type is also arranged below the inner tank bearing platform 3 and is arranged in a longitudinal and transverse equidistant mode in the range enclosed by the inner side pile groups to form middle pile groups.
As shown in fig. 4-5, the friction pendulum seismic isolation and reduction support 6 is composed of a friction pendulum seismic isolation and reduction support upper support plate 13, a friction pendulum seismic isolation and reduction support upper wear-resistant plate 14, a spherical crown body 15, a friction pendulum seismic isolation and reduction support lower wear-resistant plate 16, a friction pendulum seismic isolation and reduction support lower support plate 17 and a friction anti-pulling plate 18. The both ends of friction anti-floating piece 18 are connected through bolt and friction pendulum subtract isolation bearing upper bracket plate 13 and friction pendulum subtract isolation bearing bottom bracket plate 17 respectively, and the size and the material of friction anti-floating piece can design according to actual engineering demand.
The friction pendulum subtracts isolation bearing upper bracket board 13 is connected with the pre-buried steel sheet 24 in outer jar cushion cap 4 through the bolt, specifically, the bolt connects gradually from bottom to top and subtracts isolation bearing upper bracket board and pre-buried steel sheet 24 to with outer jar cushion cap 4's lower bottom surface fixed connection. The friction pendulum subtracts isolation bearing bottom suspension bedplate 17 is connected with the pile foundation 5 of peripheral pile group through the bolt, specifically, the bolt top-down connects gradually friction pendulum subtracts isolation bearing bottom suspension bedplate 17 and pre-buried steel sheet 24 to the last top surface of pile foundation 5 is anchored.
The friction pendulum seismic mitigation and isolation support 6 has the following beneficial effects:
first, different from traditional friction pendulum support, the setting up of anti-pulling plate 18 of friction makes the support can bear certain vertical pulling force, effectively reduces the phenomenon of swaing of outer jar, prevents that the outer jar from taking place holistic toppling and destroying. In addition, the friction anti-pulling sheet can also have the friction energy consumption effect, and the overall energy consumption capability of the support is improved.
Secondly, when the shearing force applied to the support is larger than the static friction force of the sliding block, the upper support plate and the lower support plate slide to drive the friction anti-pulling sheet 18 to move, the friction energy consumption capacity of the support is improved, the hysteresis curve of the support is increased, and therefore the dynamic response of the outer tank can be effectively reduced.
Finally, when the liquid storage tank encounters rare earthquakes or near-fault earthquakes with large ground displacement, the arrangement of the friction anti-pulling pieces 18 is beneficial to controlling the displacement response of the structure under the earthquakes, the displacement deformation of the shock insulation support is reduced, and the safety of the liquid storage tank under the earthquakes is improved.
As shown in fig. 5, the friction pendulum support 7 is composed of a friction pendulum upper support plate 19, a friction pendulum upper spherical surface sliding plate 20, a friction pendulum double-spherical surface sliding block 21, a friction pendulum lower spherical surface sliding plate 22 and a friction pendulum lower support plate 23. The friction pendulum double-spherical-surface sliding block 21 is also provided with a wear-resisting plate 28, so that the service life of the support is prolonged. The spherical surface sliding plate can be provided with coatings with different friction coefficients so as to adapt to liquid storage tank structures with different shock insulation requirements.
The friction pendulum upper support plate 19 is connected with an embedded steel plate 24 in the inner tank bearing platform 3 through a bolt, and specifically, the bolt is sequentially connected with the friction pendulum upper support plate 19 and the embedded steel plate 24 from bottom to top so as to be fixedly connected with the lower bottom surface of the inner tank bearing platform 3. The friction pendulum bottom bearing plate 23 is connected with the pile foundation 5 of the inner side group pile and the middle group pile through bolts, and specifically, the bolts are sequentially connected with the friction pendulum bottom bearing plate 23 and the embedded steel plate 24 from top to bottom so as to be anchored to the upper top surface of the pile foundation 5.
When the shearing force applied to the support is larger than the static friction force of the sliding block, the upper support plate and the lower support plate slide, the part of seismic energy input to the inner tank 2 is isolated, the dynamic hydraulic force, the base shearing force, the overturning bending moment and the tank wall stress applied to the inner tank 2 are effectively reduced, and the damping effect of the support is fully exerted.
The construction steps of the shock insulation system of the LNG liquid storage tank in the embodiment are as follows:
firstly, fixing a friction pendulum support 7 into a whole by adopting a positioning device, connecting a friction pendulum lower support plate 23 to the top surface of a pile foundation 5 through bolts, and connecting a friction pendulum upper support plate 19 to the bottom surface of an inner tank bearing platform 3;
secondly, fixing the friction pendulum vibration reduction and isolation support 6 into a whole by adopting a positioning device, connecting a lower support plate 17 of the friction pendulum vibration reduction and isolation support to the top surface of the pile foundation 5 through bolts, and connecting an upper support plate 13 of the friction pendulum vibration reduction and isolation support to the bottom surface of the outer tank bearing platform 4;
and thirdly, after the construction of the tank body is finished, the support positioning device is detached.
The embodiments described above are intended to facilitate a person of ordinary skill in the art in understanding and using the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make modifications and alterations without departing from the scope of the present invention.
Claims (8)
1. A construction method of an inner tank and outer tank separated type LNG liquid storage tank shock insulation system is characterized in that,
the shock insulation system of the LNG liquid storage tank comprises an inner tank bearing platform (3) used for bearing the inner tank of the LNG liquid storage tank, an outer tank bearing platform (4) used for bearing the outer tank of the LNG liquid storage tank, a friction pendulum shock absorption and insulation support (6), a friction pendulum support (7), a heat insulation sealing ring (12) and a pile foundation (5),
the inner tank bearing platform (3) and the outer tank bearing platform (4) are arranged at intervals, and the heat insulation sealing ring (12) is filled in the gap between the inner tank bearing platform and the outer tank bearing platform; the heat insulation sealing ring (12) is tightly filled between the outer tank bearing platform (4) and the inner tank bearing platform (3), and the heat insulation sealing ring (12) sequentially consists of a lining plate, an elastic felt, perlite, an elastic felt and a lining plate;
the pile foundation (5) is arranged at the bottoms of the inner tank bearing platform (3) and the outer tank bearing platform (4) and supports the inner tank bearing platform (3) and the outer tank bearing platform (4);
the friction pendulum vibration reduction and isolation support (6) is arranged between the outer tank bearing platform (4) and the pile foundation (5), and the friction pendulum support (7) is arranged between the inner tank bearing platform (3) and the pile foundation (5);
the construction method comprises the following steps:
firstly, before the bearing platform is poured, a circle of heat insulation sealing ring (12) consisting of perlite (11), a lining plate (26) and an elastic felt (27) is filled on a template in advance, the lining plate (26), the elastic felt (27), the perlite (11), the elastic felt (27) and the lining plate (26) are sequentially arranged on the sealing ring from outside to inside, all materials are tightly compacted, the sealing ring can be directly used as the template for separating the inner tank bearing platform from the outer tank bearing platform, and the inner tank bearing platform (3) and the outer tank bearing platform (4) can be poured after the filling of the sealing ring is finished;
secondly, fixing the friction pendulum support into a whole by adopting a positioning device, and respectively connecting the friction pendulum support with the pile foundation and the inner tank bearing platform;
thirdly, fixing the friction pendulum vibration reduction and isolation support into a whole by adopting a positioning device, and respectively connecting the friction pendulum vibration reduction and isolation support with the pile foundation and the outer tank bearing platform;
and fourthly, after the construction of the tank body is finished, the support positioning device is detached.
2. The construction method of the inner and outer tank separated type LNG storage tank shock insulation system according to claim 1, wherein the inner tank bearing platform (3) is connected with the inner tank (2) in an anchoring manner, perlite (11) is filled between the tank wall of the inner tank (2) and the tank wall of the outer tank (1), and the tank wall of the inner tank (2) is placed on the ring beam (9) and is fixedly connected with the ring beam (9) through an anchoring component.
3. The construction method of the inner and outer tank separated type LNG storage tank shock insulation system according to claim 2, characterized in that the space between the tank bottom of the inner tank (2) and the inner tank bearing platform (3) is from top to bottom: the tank bottom of the inner tank (2), a sand cushion layer (25), a foam glass brick (10), a sand cushion layer (25), a secondary bottom plate (8), a foam glass brick (10) and an inner tank bearing platform (3).
4. The construction method of the inner and outer tank separated type LNG storage tank shock insulation system according to claim 3, characterized in that the tank wall of the outer tank (1) is integrally and fixedly connected with the outer tank bearing platform (4), and a secondary bottom plate (8) and a foam glass brick (10) form a heat angle protection at a corner.
5. The construction method of the inner and outer tank separated LNG storage tank shock insulation system according to claim 1, wherein the pile foundations (5) are arranged in three ways, the first way is arranged below the outer tank bearing platform (4) and equidistantly arranged along the circumferential direction of the outer tank bearing platform (4) to form peripheral pile groups; the second type of pile is arranged below the inner tank bearing platform (3) and is equidistantly arranged along the circumferential direction of the edge of the inner tank bearing platform (3) to form inner side pile groups; the third type is also arranged below the inner tank bearing platform (3) and is arranged in a range surrounded by inner side grouped piles at equal intervals in the longitudinal and transverse directions to form middle grouped piles.
6. The construction method of the internal and external tank separated LNG storage tank shock insulation system as claimed in claim 1, wherein the friction pendulum shock insulation support (6) is composed of a friction pendulum shock insulation support upper support plate (13), a friction pendulum shock insulation support upper wear-resistant sheet (14), a spherical crown body (15), a friction pendulum shock insulation support lower wear-resistant sheet (16), a friction pendulum shock insulation support lower support plate (17) and a friction anti-pulling sheet (18),
the two ends of the friction anti-pulling piece (18) are connected with the friction pendulum seismic isolation support upper support plate (13) and the friction pendulum seismic isolation support lower support plate (17) through bolts respectively, the friction pendulum seismic isolation support upper support plate (13) is connected with a pre-embedded steel plate (24) in the outer tank bearing platform (4) through bolts, and the friction pendulum seismic isolation support lower support plate (17) is connected with the pile foundation (5) through bolts.
7. The construction method of the inner and outer tank separated LNG storage tank shock insulation system according to claim 1, characterized in that the friction pendulum support (7) is composed of a friction pendulum upper support plate (19), a friction pendulum upper spherical sliding plate (20), a friction pendulum double-spherical sliding block (21), a friction pendulum lower spherical sliding plate (22) and a friction pendulum lower support plate (23);
the friction pendulum upper support plate (19) is connected with an embedded steel plate (24) in the inner tank bearing platform (3) through bolts, and the friction pendulum lower support plate (23) is connected with the pile foundation (5) through bolts.
8. The construction method of the inner and outer tank separated type LNG storage tank shock insulation system according to claim 7, characterized in that wear-resistant plates (28) are arranged on the friction pendulum double-spherical-surface sliding blocks (21), and the spherical sliding plates are provided with coatings with different friction coefficients to adapt to the structures of the liquid storage tanks with different shock insulation requirements.
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| CN205741889U (en) * | 2016-02-01 | 2016-11-30 | 成都亚佳工程新技术开发有限公司 | A kind of without lifting bidirectional damping friction pendulum support |
| CN107604810A (en) * | 2017-08-04 | 2018-01-19 | 东南大学 | A kind of Self-resetting friction pendulum three-dimensional shock damping and insulation bearing |
| CN110565539A (en) * | 2019-09-23 | 2019-12-13 | 中铁第四勘察设计院集团有限公司 | Swivel bridge with seismic isolation and reduction functions and construction method thereof |
| CN111021238A (en) * | 2019-12-26 | 2020-04-17 | 中交公路长大桥建设国家工程研究中心有限公司 | Ellipsoidal anisotropic friction simple pendulum support |
| CN211774593U (en) * | 2020-02-23 | 2020-10-27 | 湖南大学 | Novel friction pendulum subtracts isolation bearing |
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