Lifting installation method for land large LNG module structure

Abstract

The invention discloses a lifting installation method for a land large LNG module structure. The lifting installation method for the land large LNG module structure comprises the following steps that a structure model is established; normal service condition analysis; analyzing the overall overturning and driving stability of the module and the SPMT trolley; carrying out ship loading or ship unloading working condition analysis; checking structural finite elements of the transport lifting beam, the artificial leg and the transfer beam; weighing, and verifying the actual gravity center; checking and reinforcing the bearing capacity of the transportation road; measuring and controlling the deformation of the column foot under the lifting condition of the SPMT trolley; the comparison module carries out correction on column foot and foundation positioning; and the module is lifted in place and slowly sinks until the column foot is fixed, and the trolley is withdrawn. According to the lifting installation method for the land large LNG module structure, lifting installation of an LNG module is achieved through measures such as a transfer layer structure, a lifting beam and artificial leg supporting, a positioning and deviation rectifying system for precise butt joint of a development column bottom plate and a foundation anchor bolt is matched, and reliability analysis of transportation and lifting working conditions is considered through a design source.

Description

Technical Field

[0001] The invention belongs to the field of petroleum and natural gas storage and transportation engineering, and in particular relates to a method for lifting and installing a large-scale onshore LNG module structure. Background Art

[0002] At present, there are a large number of steel structures such as equipment platforms and pipe galleries in land-based LNG receiving station projects. Various structures are scattered in various functional areas of the site according to the process requirements. Due to the weight limit of land hoisting, the construction method of its superstructure is usually to use small-tonnage trucks or crawler cranes to assemble and connect individual components or assemblies such as beams, columns, and braces on site after the foundation is constructed to form an overall structure.

[0003] Therefore, due to limitations of land lifting conditions and construction techniques, such as insufficient crane station space, too small lifting capacity within the maximum turning radius, and high risk factors, LNG structures cannot refer to marine structures to achieve large-scale modular design and installation.

[0004] For projects such as LNG receiving stations and LNG liquefaction sites, since they are close to the sea, it is feasible to transport large structural modules by ship. At the same time, the receiving stations all need to build LNG loading and unloading terminals, and the terminals are connected to the land area by piers, which provides the feasibility of land transportation of large structural modules. However, the modular installation method of large land structures is still different from that of marine projects, and large floating cranes cannot be used for installation.

[0005] Therefore, it is urgent to design a method for lifting and installing a large-scale onshore LNG module structure to solve the above-mentioned problem of lifting and installing the large-scale onshore LNG module. Summary of the invention

[0006] In order to solve the technical problem that the modular installation method of large-scale land structures mentioned in the background technology is still different from marine engineering and cannot be installed by large floating cranes, a method for lifting and installing large-scale onshore LNG module structures is provided to solve the problem of lifting and installing large-scale onshore LNG modules.

[0007] To achieve the above-mentioned purpose, the specific technical scheme of the lifting and installation method of the large-scale onshore LNG module structure of the present invention is as follows: A method for lifting and installing a large-scale onshore LNG module structure comprises the following steps: S1. Establishing structural model; S2. Analysis of normal service conditions S3, module and SPMT trolley overall overturning and driving stability analysis; S4. Loading or unloading condition analysis; S5. Finite element verification of transport beam, false legs and transfer beam structures; S6. Weigh and verify the actual center of gravity; S7. Checking the carrying capacity of transport roads and their reinforcement; S8, SPMT trolley lifting condition column foot deformation measurement and control; S9, compare the module column foot and foundation positioning to implement deviation correction; S10. The module is lifted into place and slowly lowered until the column foot is fixed, and the trolley is withdrawn.

[0008] Furthermore, in S1, a structural model is established through structural calculation software to ensure that the space dimensions and axis grid layout meet the transportation and lifting space.

[0009] Furthermore, in S2, the structural bearing capacity under normal service conditions is calculated to ensure that the overall center of gravity of the module is centered without causing a large deviation in the center of gravity.

[0010] Furthermore, in S3, the layout of the structure and upper equipment facilities is ensured by focusing on calculating the consistency of the bearing capacity of the normal service conditions of the modular structure and the transportation and lifting conditions of the modules.

[0011] Furthermore, in S4, the safety of the loading and unloading ship and the structure of the marine operating conditions are calculated in combination with the sea condition data and the ship type.

[0012] Furthermore, in S5, the finite element method is used to calculate the bearing capacity of components such as the transport lifting beam, the false leg and the transfer beam.

[0013] Further, in S6, after the module is constructed, the module is weighed to determine the center of gravity, and the parallel-connected SPMT trolley is driven to below the column at the center of the structural module to keep the center of gravity of the structural module at the center of gravity of the parallel-connected SPMT trolley.

[0014] Furthermore, in S7, based on the estimated SPMT trolley transport route, the impact of the trolley tire pressure on the bearing capacity of the road and the dock is calculated. If the road cannot meet the requirements, it is necessary to adjust the module area, divide the weight, or reinforce the road and the dock.

[0015] Furthermore, in S8, after the module structure is loaded, unloaded and transported to the installation site by the SPMT trolley, the module column foot elevation and deformation are monitored through the positioning and correction system.

[0016] Furthermore, in S9, the foundation positioning is remeasured before the lifting and installation, and the consistency of the module column foot positioning is checked. If there is an excessive error, the difference in the column foot positioning and the foundation positioning is adjusted through the positioning and correction system.

[0017] The lifting and installation method of the onshore large-scale LNG module structure of the present invention has the following advantages: Through measures such as the transfer layer structure, lifting beams and false leg supports, and the development of a positioning and correction system for precise docking of column base plates and foundation anchor bolts, the lifting and installation of the LNG module is realized by considering the reliability analysis of transportation and lifting conditions at the source of the design. The entire process of this application does not rely on the transfer floating crane and the closing crane, and is less sensitive to environmental factors such as wind power; through the positioning and correction system, the operating space and accuracy of the SPMT trolley are expanded, and the construction period and safety risks can be greatly shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The process flow chart of the lifting and installation method of the large-scale onshore LNG module structure of the present invention; Figure 2 A schematic diagram of an SMPT trolley for the lifting and installation method of a large-scale onshore LNG module structure of the present invention; Figure 3 A schematic diagram of a lifting beam of a method for lifting and installing a large-scale onshore LNG module structure according to the present invention; Figure 4 A schematic diagram of a pier for the lifting and installation method of a large-scale onshore LNG module structure of the present invention; Figures 5 to 7 It is a schematic diagram of the SPMT trolley transport structure module of the lifting and installation method of the onshore large-scale LNG module structure of the present invention; Figure 8 It is a schematic diagram of the arrangement of the column foot positioning system of the lifting and installation method of the large-scale onshore LNG module structure of the present invention; Fig. 9 It is a schematic diagram of the column foot deviation correction system of the lifting and installation method of the onshore large-scale LNG module structure of the present invention; Fig.10 and Fig.11 This is a three-dimensional rendering of the structural module of the lifting and installation method of the large-scale onshore LNG module structure of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Fig.11 The present invention describes the method for lifting and installing a large-scale onshore LNG module structure.

[0022] like Figures 1 to 11 As shown, the lifting and installation method of the onshore large-scale LNG module structure in the present invention plans the transportation and lifting conditions in advance at the design source, incorporates the conversion components into the force analysis of the overall structure, and formulates a high-precision positioning and correction system for the SPMT lifting link, including the following steps: S1. Use structural calculation software to build a model to ensure that the space dimensions and axis grid layout meet the transportation and lifting space requirements.

[0023] S2. Carry out the calculation of the structural bearing capacity under normal service conditions and ensure that the overall center of gravity of the module is centered without large deviation of the center of gravity; Preferably, when the weight center of gravity of the structural module is different, the grouping and parallel connection of the trolleys are also different. When the stability of the structural module is unreliable or the calculation strength is insufficient, it is necessary to appropriately adjust the module area division or reduce the transportation weight.

[0024] S3. Calculate the overall anti-overturning and driving stability analysis of the module and the SPMT trolley to ensure the consistency of the bearing capacity of the normal service condition of the modular structure and the module transportation and lifting condition.

[0025] S4. Analyze the loading or unloading conditions, and calculate the structural safety of loading and unloading and marine conditions in combination with sea condition data and ship types.

[0026] S5. Use the finite element method to accurately calculate the bearing capacity of transport beams, false legs, transfer beams and other components; Preferably, the outer dimensions of the supporting beams need to take into account the installation height of the structural modules, the spacing between the bottom structural columns, and the bearing capacity of the beams on the upper structural modules. It is also necessary to analyze and calculate the structural strength of the supporting beams and piers.

[0027] S6. After the module is built, weigh the module to determine the center of gravity, and drive the parallel-connected SPMT trolley to the bottom of the column at the center of the structural module to keep the center of gravity of the structural module at the center of gravity of the parallel-connected SPMT trolley.

[0028] S7. Based on the estimated SPMT trolley transport route, calculate the impact of the trolley tire pressure on the road and wharf bearing capacity; if the road cannot reach the required capacity, it is necessary to adjust the module area, divide the weight, or reinforce the road or wharf.

[0029] S8. After the module structure is loaded, unloaded and transported to the installation site by the SPMT trolley, the module column foot elevation and deformation are monitored through the positioning and correction system.

[0030] S9. Before lifting and installation, remeasure the foundation positioning and check the consistency of the module column foot positioning. If there is an excessive error, adjust the difference between the column foot positioning and the foundation positioning through the positioning and correction system.

[0031] S10, the trolley slowly drives into the predetermined position of the foundation, aligns the lifting module with the foundation, and gradually lowers the module. During the process, the positioning and deviation correction system dynamically deforms the column feet, and the column feet and the foundation are docked in groups until all are reliably docked. After the support conversion is completed, the trolley withdraws; Preferably, during the lifting and installation process of the structural module, the effect of structural deformation on the precise closing needs to be continuously monitored. If necessary, the column foot position needs to be forcibly corrected through the positioning and correction system until the column foot and the foundation are precisely closed.

[0032] Figure 6 and Figure 7 F in the middle is SPMT; G is the cushion pier; H is the transport lifting beam. Figure 8 The middle shaded area I is the pier foundation, where the positioning system is evenly arranged; Fig. 9 J in the middle is the jack, there are four of them; K is the column foot, which is H-shaped; the shaded area L is the column pier; and M is the frame supporting the jack.

[0033] As a preferred embodiment of this application: First, the foundation bearing capacity test is carried out, and a test report is issued and the SPMT trolley data is verified; Then, use TEKLA and SACS software to perform 3D modeling of the steel structure, input the center of gravity in TEKLA software into SACS, and modify the center of gravity position of the steel structure in SACS software; Then, the structural module calculation is carried out according to the foundation bearing capacity, the load of the laying vehicle, and the walking of the SPMT on the site, the normal service condition analysis is carried out, the area is divided according to the calculated structure, the pieces are assembled, and after the pieces are transported, they are closed at the installation location; Then, the module and the SPMT trolley are analyzed for overall anti-overturning and driving stability. The software is used to calculate the transportation process. The calculation coefficients include dynamic load, wind load, uneven load and weight correction coefficient, etc. The transportation stability calculation is calculated and the UC value is not more than 1, the displacement value is not more than 160 / L, and the L value is the length of the structural module in the X, Y and Z directions; Then, the loading or unloading condition analysis is carried out; Then, the transport road bearing capacity is checked and reinforced; Then, the cushion piers are arranged at the assembly site to assemble the structural modules; Then, after the assembly is completed, the lifting beam is used to cooperate with the SPMT trolley for the layout and transportation work, and the structural module is transported to its installation location, and the structural module is installed as a whole; Then, the deformation of the column foot is measured and controlled in the SPMT trolley lifting condition; Then, the module is lifted into place, slowly lowered until the column foot is fixed, and the trolley is withdrawn; Finally, if there is a next set of modules, continue to carry out technical construction according to the above requirements.

[0034] The lifting and installation method based on the large-scale onshore LNG module structure adopts measures such as conversion layer structure, lifting beam and false leg support, and develops a positioning and correction system for precise docking of column base plate and foundation anchor bolts. The lifting and installation of LNG modules is realized by considering the reliability analysis of transportation and lifting conditions at the source of design. The whole process of this application does not rely on the transfer floating crane and closing crane, and is less sensitive to environmental factors such as wind power; through the positioning and correction system, the operating space and accuracy of the SPMT trolley are expanded, and the construction period and safety risks can be greatly shortened.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for lifting and installing a large-scale LNG module structure on land, characterized in that: The following steps are involved: S1. Establishing structural model; S2. Analysis of normal service conditions; S3, module and SPMT trolley overall overturning and driving stability analysis; S4. Loading or unloading condition analysis; S5. Finite element verification of transport beam, false legs and transfer beam structures; S6. Weigh and verify the actual center of gravity; S7. Checking the carrying capacity of transport roads and their reinforcement; S8, SPMT trolley lifting condition column foot deformation measurement and control; S9, compare the module column foot and foundation positioning to implement deviation correction; S10. The module is lifted into place and slowly lowered until the column foot is fixed, and the trolley is withdrawn.

2. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1 is characterized in that: In S1, a structural model is established using structural calculation software to ensure that the space dimensions and axis grid layout meet the transportation and lifting space requirements.

3. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S2, the structural bearing capacity under normal service conditions is calculated to ensure that the overall center of gravity of the module is centered without causing a large deviation in the center of gravity.

4. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S3, the layout of the structure and upper equipment facilities is ensured by calculating the consistency of the bearing capacity of the modular structure under normal service conditions and the module transportation and lifting conditions.

5. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S4, the safety of the structure of loading and unloading ships and marine conditions is calculated in combination with sea condition data and ship types.

6. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S5, the finite element method is used to calculate the bearing capacity of components such as transport lifting beams, false legs and transfer beams.

7. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S6, after the module is built, the module is weighed to determine the center of gravity, and the parallel-connected SPMT trolley is driven to the bottom of the column at the center of the structural module to keep the center of gravity of the structural module at the center of gravity of the parallel-connected SPMT trolley.

8. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S7, based on the estimated SPMT trolley transport route, the impact of the trolley tire pressure on the bearing capacity of the road and the dock is calculated. If the road cannot meet the requirements, module area adjustment, weight division or road and dock reinforcement are required.

9. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S8, after the module structure is loaded, unloaded and transported to the installation site by the SPMT trolley, the module column foot elevation and deformation are monitored through the positioning and correction system.

10. The method for lifting and installing a large-scale onshore LNG module structure according to claim 1, characterized in that: In S9, the foundation positioning is remeasured before lifting and installation, and the consistency of the module column foot positioning is checked. If there is an excessive error, the difference in column foot positioning and foundation positioning is adjusted through the positioning and correction system.

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