CN116359030A - Hydraulic test structure of marine LNG liquid cargo tank and design method thereof - Google Patents
Hydraulic test structure of marine LNG liquid cargo tank and design method thereof Download PDFInfo
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- CN116359030A CN116359030A CN202310639984.7A CN202310639984A CN116359030A CN 116359030 A CN116359030 A CN 116359030A CN 202310639984 A CN202310639984 A CN 202310639984A CN 116359030 A CN116359030 A CN 116359030A
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- 239000007788 liquid Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 50
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 9
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 7
- 239000002023 wood Substances 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 239000004567 concrete Substances 0.000 abstract description 8
- 238000005452 bending Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a hydraulic test structure of a marine LNG liquid cargo tank and a design method thereof, wherein the hydraulic test structure comprises a hydraulic test saddle, a detachable bearing beam, a reinforced concrete beam, a prestressed pipe pile and a fixed support; the hydraulic test saddle is supported below the liquid cargo tank; the detachable bearing beam is detachably connected with the hydrostatic test saddle through a fixing piece; the detachable bearing beam is connected with the reinforced concrete beam through temporary welding; the prestressed pipe piles are arranged in a plurality and distributed at the bottom of the reinforced concrete beam; the fixing support is provided with two and symmetrically installed on the left side and the right side of the hydrostatic test saddle. The invention adopts the combination of the detachable bearing beam and the hydraulic test saddle to participate in the stress calculation, and the load is intensively applied according to the pile position below the detachable bearing beam; the reinforced concrete beam only plays a role of stabilizing the tubular pile during calculation, does not participate in stress calculation, and greatly reduces construction workload, construction period and construction total cost because the strength and bending resistance of the omitted concrete large bearing platform are smaller than those of the steel structure.
Description
Technical Field
The invention relates to the technical field of construction of large LNG liquid cargo tanks of ships, in particular to a hydrostatic test structure of an LNG liquid cargo tank for a ship and a design method thereof.
Background
The marine large LNG liquid cargo tank hydrostatic test is heavy in weight, the saddle and the foundation are small in stress area, and the requirements on safety are high. The general practice is to specially design and manufacture the integrated foundation of the steel pile and the concrete bearing platform according to the stress requirement of the saddle on the foundation. The method adopts the reinforced concrete bearing platform, so that the concrete strength and the bending resistance are small compared with those of a steel structure, the design is very thick, the foundation construction amount is large, the foundation is not dismountable, the period is long, the cost is high, the method is suitable for long-term use and is not suitable for short-term or temporary use, the hydraulic test structure of the marine LNG liquid cargo tank and the design method thereof are needed, and the design and manufacturing problems of the hydraulic test saddle and the foundation of the marine large LNG liquid cargo tank used in short-term or temporary use under the conditions of short period and lower cost are solved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a hydraulic test structure of a marine LNG liquid cargo tank and a design method thereof, wherein a detachable load beam and a hydraulic test saddle are combined to participate in stress calculation, and load is intensively applied below the detachable load beam according to the pile position; the reinforced concrete beam only plays a role of stabilizing the tubular pile during calculation, does not participate in stress calculation, and greatly reduces construction workload, construction period and construction total cost because the strength and bending resistance of the omitted concrete large bearing platform are smaller than those of the steel structure.
The invention is realized by the following technical scheme:
the hydraulic test structure of the marine LNG liquid cargo tank comprises a hydraulic test saddle, a detachable bearing beam, a reinforced concrete beam, a prestressed pipe pile and a fixed support; the hydrostatic test saddle is supported below the liquid cargo tank; the detachable bearing beam is detachably connected with the hydrostatic test saddle through a fixing piece; the detachable bearing beam and the reinforced concrete beam are connected through temporary welding; the prestressed pipe piles are arranged in a plurality and distributed at the bottom of the reinforced concrete beam; the fixing support is provided with two and symmetrically installed on the left side and the right side of the hydrostatic test saddle.
Further, the left side and the right side of the upper part of the liquid cargo tank are provided with supports; and a fixed rod is connected between the fixed support and the support.
Further, the fixing piece is a bolt.
Further, the liquid cargo tank was placed on the hydrostatic saddle by laminated wood.
The invention also provides a design method of the hydraulic test structure of the marine LNG liquid cargo tank, which specifically comprises the following steps:
s1, designing a hydraulic test saddle, wherein the hydraulic test saddle adopts an I-shaped variable cross section, is arranged corresponding to the position of a fixed saddle and a sliding saddle for the tank body of the liquid cargo tank to work, and is supported below laminated wood of the liquid cargo tank; the structural size of the hydraulic test saddle is required to bear 1.5 times of the working pressure of the liquid cargo tank, and combined design calculation is carried out by combining the size of the detachable bearing beam, and the lower part of the detachable bearing beam is provided with concentrated stress points according to the pile position during calculation, or the position of the prestressed pipe pile is regulated according to the stress so as to ensure that the stress and deformation requirements during the hydraulic test of the liquid cargo tank are met;
s2, designing reinforced concrete beams and prestressed pipe piles, wherein the reinforced concrete beams and the prestressed pipe piles are designed according to the load and reasonable spacing/position of a liquid cargo tank in a hydraulic test by combining the distribution characteristics of foundation rock and soil layers and the bearing capacity of each stratum;
s3, adopting a detachable load beam and a hydrostatic test saddle combination to participate in stress calculation, and applying load under the detachable load beam in a concentrated manner according to the pile position; the reinforced concrete beam only plays a role in stabilizing the pipe pile during calculation and does not participate in stress calculation;
and S4, designing a fixed support, wherein the fixed support is mainly used as a welding support hung below the liquid cargo tank body during transportation, and when the liquid cargo tank body is transported along with the hydraulic test saddle, a welding fixing rod can be arranged between the support arranged on the left side and the right side of the upper part of the hydraulic test saddle and the fixed support, so that the hydraulic test saddle is ensured to be hung below the liquid cargo tank body.
Further, when the liquid cargo tank needs to be transported, the detachable bearing beam is detached from the hydrostatic test saddle, the hydrostatic test saddle and the liquid cargo tank are bound together for transportation, and the hydrostatic test saddle also serves as a transportation saddle.
In summary, the invention has the following beneficial effects:
the concrete large bearing platform with uniformly distributed load action is not required, only the reinforced concrete beam is arranged, the load is directly transmitted to the detachable bearing beam and the hydraulic test saddle by the prestressed pipe pile, the combination of the detachable bearing beam and the hydraulic test saddle is adopted to participate in stress calculation, and the load is intensively applied below the detachable bearing beam according to the pile position; the reinforced concrete beam only plays a role in stabilizing the pipe pile during calculation and does not participate in stress calculation; because the strength and the bending resistance of the saved concrete large bearing platform are smaller than those of the steel structure, the construction workload is greatly reduced, the construction period is shortened, and the total construction cost is greatly reduced. And the detachable bearing Liang Fangbian in the method is detached and can be used as other steel beams when not in use.
Drawings
Fig. 1 is a schematic diagram showing the overall structure of a hydrostatic test structure of a marine LNG liquid cargo tank according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a front view of an LNG liquid cargo tank in accordance with an embodiment of the present invention after the LNG liquid cargo tank is secured to a hydrostatic test saddle;
fig. 4 is a side view of an LNG liquid cargo tank in accordance with an embodiment of the present invention after the tank is secured to a hydrostatic test saddle.
Reference numerals illustrate: 1-hydrostatic test saddle; 2-a detachable load beam; 3-reinforced concrete beams; 4-pre-stressing pipe piles; 5-fixing the support; 6-a liquid cargo tank; 7-supporting seats; 8-fixing rods; 9-laminate wood.
Detailed Description
The present invention will now be described in detail with reference to the drawings and the specific embodiments thereof, which are illustrative embodiments and illustrations of the invention, but are not to be construed as limiting the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, back, upper, lower, top, bottom … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicators are correspondingly changed.
In the present invention, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first", "a second" may include at least one such feature, either explicitly or implicitly; in addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention is described in further detail below with reference to fig. 1-4.
Referring to fig. 1, a hydrostatic test structure of a marine LNG liquid cargo tank includes a hydrostatic test saddle 1, a detachable carrier beam 2, a reinforced concrete beam 3, a prestressed pipe pile 4, and a fixed support 5; the hydrostatic test saddle 1 is supported below the liquid cargo tank 6; the detachable bearing beam 2 is detachably connected with the hydrostatic test saddle 1 through a fixing piece; the detachable bearing beam 2 and the reinforced concrete beam 3 are connected through temporary welding; the prestressed pipe piles 4 are arranged in a plurality and distributed at the bottom of the reinforced concrete beam 3; the two fixing supports 5 are symmetrically arranged on the left side and the right side of the hydrostatic test saddle 1.
Specifically, in this embodiment, the left and right sides of the upper part of the liquid cargo tank 6 are provided with supports 7; a fixing rod 8 is connected between the fixing support 5 and the support 7. By providing the fixing rod 8, the hydrostatic test saddle 1 is ensured to be hung below the tank body of the liquid cargo tank 6.
Specifically, in this embodiment, the fixing member is a bolt. It should be noted that, through bolted connection, it is all convenient to assemble or dismantle between removable carrier beam 2 and the hydrostatic test saddle 1, greatly reduced construction work load shortens construction cycle, greatly reduced construction total cost, and removable carrier beam 2 can also be used as other girder steel when not using.
Specifically, in this embodiment, the liquid cargo tank 6 is placed on the hydrostatic test saddle 1 by laminated wood 9.
The invention also provides a design method of the hydraulic test structure of the marine LNG liquid cargo tank, which specifically comprises the following steps:
s1, designing a hydrostatic test saddle 1, wherein the hydrostatic test saddle 1 adopts an I-shaped variable cross section, is arranged corresponding to the position of a fixed saddle and a sliding saddle for the tank body of a liquid cargo tank 6, and is supported below laminated wood 9 of the liquid cargo tank 6; the structural size of the hydrostatic test saddle 1 is required to bear 1.5 times of the working pressure of the liquid cargo tank 6, and combined design calculation is carried out by combining the size of the detachable bearing beam 2, and the lower part of the detachable bearing beam 2 is provided with concentrated stress points according to the pile position during calculation, or the position of the prestressed pipe pile 4 is adjusted according to the stress so as to ensure that the stress and deformation requirements during the hydrostatic test of the liquid cargo tank are met;
s2, designing reinforced concrete beams 3 and prestressed pipe piles 4, wherein the design is carried out according to the load and reasonable spacing/position during hydraulic test of a liquid cargo tank by combining the distribution characteristics of foundation rock and soil layers and the bearing capacity of each stratum;
s3, adopting a combination of a detachable load beam 2 and a hydrostatic test saddle 1 to participate in stress calculation, and applying load under the detachable load beam according to pile positions in a concentrated manner; the reinforced concrete beam 3 only plays a role in stabilizing the pipe pile during calculation and does not participate in stress calculation;
and S4, designing a fixed support 5, wherein the fixed support 5 is mainly used as a welding support hung below the liquid cargo tank 6 during transportation, and when the liquid cargo tank 6 is transported along with the hydrostatic test saddle 1, a fixed rod 8 can be welded between the support 7 arranged on the left side and the right side of the upper part of the hydrostatic test saddle 1 and the fixed support 5, so that the hydrostatic test saddle 1 is ensured to be hung below the liquid cargo tank 6.
Specifically, in this embodiment scheme, when liquid cargo tank 6 needs to transport, with removable carrier bar 2 with hydrostatic test saddle 1 split, hydrostatic test saddle 1 and liquid cargo tank 6 ligature transport together, and hydrostatic test saddle 1 has the effect of transporting the saddle concurrently.
In summary, the invention has the following beneficial effects:
according to the invention, a concrete large bearing platform with uniformly distributed load action is not required, only a reinforced concrete beam 3 is arranged, the load is directly transmitted to the detachable bearing beam and the hydrostatic test saddle 1 through the tubular pile, the detachable bearing beam 2 and the hydrostatic test saddle 1 are combined to participate in stress calculation, and the load is intensively applied according to the pile position below the detachable bearing beam; the reinforced concrete beam 3 only plays a role of stabilizing the pipe pile during calculation, does not participate in stress calculation, and greatly reduces construction workload, shortens construction period and greatly reduces construction total cost because the strength and bending resistance of the omitted concrete large bearing platform are smaller than those of the steel structure. The detachable bearing beam 2 in the method is convenient to detach, and can be used as other steel beams when not in use.
The foregoing has described in detail the technical solutions provided by the embodiments of the present invention, and specific examples have been applied to illustrate the principles and implementations of the embodiments of the present invention, where the above description of the embodiments is only suitable for helping to understand the principles of the embodiments of the present invention; meanwhile, as for those skilled in the art, according to the embodiments of the present invention, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present invention.
Claims (6)
1. The utility model provides a marine LNG liquid cargo tank's hydrostatic test structure which characterized in that: the hydraulic test device comprises a hydraulic test saddle, a detachable load beam, a reinforced concrete beam, a prestressed pipe pile and a fixed support; the hydrostatic test saddle is supported below the liquid cargo tank; the detachable bearing beam is detachably connected with the hydrostatic test saddle through a fixing piece; the detachable bearing beam and the reinforced concrete beam are connected through temporary welding; the prestressed pipe piles are arranged in a plurality and distributed at the bottom of the reinforced concrete beam; the fixing support is provided with two and symmetrically installed on the left side and the right side of the hydrostatic test saddle.
2. The hydrostatic test structure of a marine LNG liquid cargo tank according to claim 1, wherein: the left side and the right side of the upper part of the liquid cargo tank are provided with supports; and a fixed rod is connected between the fixed support and the support.
3. The hydrostatic test structure of a marine LNG liquid cargo tank according to claim 1, wherein: the fixing piece is a bolt.
4. The hydrostatic test structure of a marine LNG liquid cargo tank according to claim 1, wherein: the liquid cargo tank is placed on the hydrostatic test saddle by laminated wood.
5. The method for designing a hydrostatic test structure of a marine LNG liquid cargo tank according to claim 2, comprising the steps of:
s1, designing a hydraulic test saddle, wherein the hydraulic test saddle adopts an I-shaped variable cross section, is arranged corresponding to the position of a fixed saddle and a sliding saddle for the tank body of the liquid cargo tank to work, and is supported below laminated wood of the liquid cargo tank; the structural size of the hydraulic test saddle is required to bear 1.5 times of the working pressure of the liquid cargo tank, and combined design calculation is carried out by combining the size of the detachable bearing beam, and the lower part of the detachable bearing beam is provided with concentrated stress points according to the pile position during calculation, or the position of the prestressed pipe pile is regulated according to the stress so as to ensure that the stress and deformation requirements during the hydraulic test of the liquid cargo tank are met;
s2, designing reinforced concrete beams and prestressed pipe piles, wherein the reinforced concrete beams and the prestressed pipe piles are designed according to the load, the interval and/or the position of a liquid cargo tank in a hydraulic test by combining the distribution characteristics of a foundation rock-soil layer and the bearing capacity of each stratum;
s3, adopting a detachable load beam and a hydrostatic test saddle combination to participate in stress calculation, and applying load under the detachable load beam in a concentrated manner according to the pile position; the reinforced concrete beam only plays a role in stabilizing the pipe pile during calculation and does not participate in stress calculation;
and S4, designing a fixed support, wherein the fixed support is mainly used as a welding support hung below the liquid cargo tank body during transportation, and when the liquid cargo tank body is transported along with the hydraulic test saddle, a welding fixing rod can be arranged between the support arranged on the left side and the right side of the upper part of the hydraulic test saddle and the fixed support, so that the hydraulic test saddle is ensured to be hung below the liquid cargo tank body.
6. The design method of the hydrostatic test structure of the marine LNG liquid cargo tank according to claim 5, wherein the design method comprises the following steps: when the liquid cargo tank needs to be transported, the detachable bearing beam is detached from the hydrostatic test saddle, the hydrostatic test saddle and the liquid cargo tank are bound together for transportation, and the hydrostatic test saddle also serves as a transportation saddle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310639984.7A CN116359030B (en) | 2023-06-01 | 2023-06-01 | Hydraulic test structure of marine LNG liquid cargo tank and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310639984.7A CN116359030B (en) | 2023-06-01 | 2023-06-01 | Hydraulic test structure of marine LNG liquid cargo tank and design method thereof |
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| CN116359030B CN116359030B (en) | 2023-08-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785457A (en) * | 1995-11-27 | 1998-07-28 | Horner & Shifrin, Inc. | Pipe placement and support system |
| CN104596704A (en) * | 2015-03-02 | 2015-05-06 | 启东丰顺船舶重工有限公司 | LNG tank testing method |
| CN207717504U (en) * | 2018-01-25 | 2018-08-10 | 中国水利水电第七工程局有限公司 | A kind of support construction for ultra-large type bifurcated pipe group's water pressure test |
| CN114319143A (en) * | 2021-10-28 | 2022-04-12 | 四川路桥华东建设有限责任公司 | Bridge top pushes away interim mound structure suitable for in deep soft soil stratum |
| CN114857432A (en) * | 2022-04-29 | 2022-08-05 | 中船广西船舶及海洋工程有限公司 | Reinforcing method for hydraulic test of liquid tank |
-
2023
- 2023-06-01 CN CN202310639984.7A patent/CN116359030B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785457A (en) * | 1995-11-27 | 1998-07-28 | Horner & Shifrin, Inc. | Pipe placement and support system |
| CN104596704A (en) * | 2015-03-02 | 2015-05-06 | 启东丰顺船舶重工有限公司 | LNG tank testing method |
| CN207717504U (en) * | 2018-01-25 | 2018-08-10 | 中国水利水电第七工程局有限公司 | A kind of support construction for ultra-large type bifurcated pipe group's water pressure test |
| CN114319143A (en) * | 2021-10-28 | 2022-04-12 | 四川路桥华东建设有限责任公司 | Bridge top pushes away interim mound structure suitable for in deep soft soil stratum |
| CN114857432A (en) * | 2022-04-29 | 2022-08-05 | 中船广西船舶及海洋工程有限公司 | Reinforcing method for hydraulic test of liquid tank |
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