CN113536618A - Positioning method of large steel structure - Google Patents
Positioning method of large steel structure Download PDFInfo
- Publication number
- CN113536618A CN113536618A CN202110557162.5A CN202110557162A CN113536618A CN 113536618 A CN113536618 A CN 113536618A CN 202110557162 A CN202110557162 A CN 202110557162A CN 113536618 A CN113536618 A CN 113536618A
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- steel structure
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- jacking
- jacking devices
- large steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 99
- 239000010959 steel Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention discloses a large steel structure positioning method, which comprises the following steps: determining two groups of stress points of the large-scale steel structure; determining the model of the jacking device; the large steel structure arranged on the segmented platform is transferred to a designated place by using a flat car; mounting a first group of jacking devices at one group of stress points of the large-scale steel structure to support the large-scale steel structure; the flat car and the subsection platform are moved away; installing a second group of jacking devices at the other group of stress points of the large-scale steel structure; and the jacking heights of the first group of jacking devices and the second group of jacking devices are alternately adjusted so that the large steel structure is located on the ground. The invention does not need to consider the lifting capacity of the large steel structure at the site, and can make the steel structure as large as possible when manufacturing the steel structure, thereby reducing the subsequent assembly and assembly work and having no requirement on the site space size of the site.
Description
Technical Field
The invention relates to the technical field of steel structure installation, in particular to a positioning method of a large-scale steel structure.
Background
At present, when a modern steel structure is manufactured, prefabrication and assembly are generally carried out in a centralized place, supporting facilities such as crane resources, dynamic energy sources and the like in the place are abundant generally, and the steel structure is assembled by raw material parts, so that a long manufacturing period is realized.
After a large steel structure is assembled, the steel structure is usually transferred to a designated place through a flat car (or a rail car, a modular car and the like), and because large-scale hoisting equipment (such as a high crane, a gantry crane and the like) is not usually arranged at the designated place, the steel structure can only be hoisted by using mobile crane resources such as a truck crane and the like, and the hoisting tonnage of the truck crane is limited, the whole weight of the steel structure is limited when the steel structure is manufactured, so that the condition that the steel structure cannot be hoisted when the steel structure is assembled at a designated landing place is avoided; in addition, when the automobile crane works, a large place is required to be arranged around the steel structure falling position so that the automobile crane can be conveniently parked, and the automobile can be driven away after the steel structure falling position is ensured.
Therefore, the disadvantage of the prior art is that the weight of the assembled large steel structure is greatly limited, and a relatively open place is needed around the position where the large steel structure falls, so that a truck crane and the like can normally drive away after being lifted.
Disclosure of Invention
In view of the above, the present invention provides a method for positioning a large steel structure, so as to solve the above problems in the background art.
A large steel structure positioning method specifically comprises the following steps:
s1, carrying out finite element calculation on the large steel structure, and determining two groups of stress points of the large steel structure;
s2, determining the number and the model of the jacking devices according to the stress points of the large steel structure;
s3, using a flat car to transport the large steel structure arranged on the segmented platform to a designated place;
s4, mounting a first group of jacking devices at one group of stress points of the large-scale steel structure to support the large-scale steel structure, wherein the jacking heights of the first group of jacking devices are in the maximum state;
s5, removing the flat car and the subsection platform;
s6, installing a second group of jacking devices at the other group of stress points of the large-scale steel structure, wherein the jacking stroke of the second group of jacking devices is smaller than that of the first group of jacking devices;
and S7, alternately adjusting the jacking heights of the first group of jacking devices and the second group of jacking devices to enable the large steel structure to be placed on the ground.
Preferably, the step S1 of performing finite element calculation on the large steel structure includes the specific steps of:
firstly, estimating the stress point of a large steel structure according to the weight of the large steel structure;
and then, analyzing the stress condition of each stress point by using finite element analysis software, and if the large steel structure deforms and the deformation exceeds the load deformation, increasing the number of the stress points or changing the position of the estimated stress point.
Preferably, the large steel structure refers to a steel structure which occupies 25 square meters to 600 square meters and has the weight of not less than 200 tons.
Preferably, the step S7 of alternately adjusting the jacking heights of the first group of jacking devices and the second group of jacking devices includes:
firstly, lowering the jacking height of a first group of jacking devices to make the jacking height lower than that of a second group of jacking devices, so that the second group of jacking devices supports the large-scale steel structure;
then, lowering the jacking height of the second group of jacking devices to enable the jacking height to be lower than that of the first group of jacking devices, so that the first group of jacking devices support the large-scale steel structure;
and repeating the steps until the large-scale steel structure is placed on the ground.
Preferably, the segmented platform is a portal or pier.
The invention has the beneficial effects that:
1. the method does not need to consider the lifting capacity of the large steel structure at the site, can make the steel structure as large as possible when manufacturing the steel structure, reduces subsequent assembly and assembly work, does not need to consider the space problems of turnover at the site, parking of a truck crane and the like, effectively saves the surrounding construction site, and has no requirement on the space size of the site.
2. This application adopts the mode safety coefficient that jacking device fell position to improve a lot than the mode that adopts the truck crane hoist and mount, has improved the security performance greatly, reduces the safe risk when large-scale steel construction fell position.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an assembly view of a large steel structure.
Fig. 2 is a schematic diagram of the alternate descent of the oil pump.
FIG. 3 is a flow chart of the method of the present application.
The reference numerals in the figures have the meaning:
1 is the ground, 2 is first layer steel construction, 3 is the cushion, and 4 is the oil pump.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected" and "fixed" are used in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a large steel structure positioning method, which specifically comprises the following steps:
and S1, carrying out finite element calculation on the large steel structure, and determining two groups of stress points of the large steel structure.
Specifically, firstly, estimating the stress point of the large steel structure according to the weight of the large steel structure;
and then, analyzing the stress condition of each stress point by using finite element analysis software, and if the large steel structure deforms and the deformation exceeds the load deformation, increasing the number of the stress points or changing the position of the estimated stress point.
The large steel structure is a steel structure which occupies 25-600 square meters of the ground and has the weight of not less than 200 tons.
And S2, determining the number and the model of the jacking devices according to the stress points of the large steel structure.
And S3, using the flat car to transport the large steel structure arranged on the subsection platform to a designated place.
The segmented platform is a portal or a pier.
And S4, mounting a first group of jacking devices at one group of stress points of the large steel structure to support the large steel structure, wherein the jacking heights of the first group of jacking devices are in the maximum state.
And S5, removing the flat car and the subsection platform.
And S6, installing a second group of jacking devices at the other group of stress points of the large steel structure, wherein the jacking stroke of the second group of jacking devices is smaller than that of the first group of jacking devices.
And S7, alternately adjusting the jacking heights of the first group of jacking devices and the second group of jacking devices to enable the large steel structure to be placed on the ground.
Specifically, firstly, lowering the jacking height of a first group of jacking devices to make the jacking height lower than that of a second group of jacking devices, so that the second group of jacking devices supports the large-scale steel structure;
then, lowering the jacking height of the second group of jacking devices to enable the jacking height to be lower than that of the first group of jacking devices, so that the first group of jacking devices support the large-scale steel structure;
and repeating the steps until the large-scale steel structure is placed on the ground.
The first group of jacking devices and the second group of jacking devices are identical in structure and are composed of cushion blocks and oil pumps arranged on the cushion blocks.
In the process of alternately adjusting the first set of jacking devices and the second set of jacking devices, it should be noted that when the stroke of the oil pump in one set of jacking devices is at the lowest position, the stroke of the oil pump in the other set of jacking devices is at a higher position (as shown in fig. 2), the oil pump in the other set of jacking devices is slightly jacked up, and then the cushion block below the oil pump with the lowest stroke is lowered. The cushion blocks below the two groups of oil pumps are alternately adjusted and reduced until the large-scale steel structure is positioned on the ground. Therefore, the height descending amplitude of the large steel structure at each time can be maximized, the times of alternate adjustment are reduced, and the descending and landing operation time is shortened.
The embodiment of the method of the present invention will be specifically described below by taking a ship superstructure (i.e., a large steel structure) as an example.
Six-storey steel structures of a superstructure (the overall weight of the superstructure is about 500 tons) are placed on piers or gantries for assembly at an assembly site where cranes and dynamic energy resources are abundant, as shown in fig. 1.
Estimating two groups of stress points according to the whole weight of the superstructure; and analyzing the stress condition of each stress point by using finite element analysis software, and if the large steel structure deforms and the deformation exceeds the load deformation, increasing the number of the stress points or changing the position of the estimated stress point.
The type of the jacking device is determined according to the stress point of the superstructure, and the sum of jacking loads of all the jacking devices is not less than the weight of the superstructure.
And the superstructure and the portal frame or the rest pier are together transferred to a designated place by using the flat car.
A first group of jacking devices are installed at one group of stress points of the superstructure to support the large steel structure, and the jacking height of the first group of jacking devices is in the maximum state.
And after the first group of jacking devices are installed, the flat car and the segmented platform are moved away.
And installing a second group of jacking devices at the other group of stress points of the large-scale steel structure, wherein the jacking height of the second group of jacking devices is smaller than the current jacking height of the first group of jacking devices.
And then, alternately adjusting the jacking heights of the first group of jacking devices and the second group of jacking devices to enable the large steel structure to be located on the ground.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A method for positioning a large steel structure is characterized by comprising the following steps:
s1, carrying out finite element calculation on the large steel structure, and determining two groups of stress points of the large steel structure;
s2, determining the number and the model of the jacking devices according to the stress points of the large steel structure;
s3, using a flat car to transport the large steel structure arranged on the segmented platform to a designated place;
s4, mounting a first group of jacking devices at one group of stress points of the large-scale steel structure to support the large-scale steel structure, wherein the jacking heights of the first group of jacking devices are in the maximum state;
s5, removing the flat car and the subsection platform;
s6, installing a second group of jacking devices at the other group of stress points of the large-scale steel structure, wherein the jacking stroke of the second group of jacking devices is smaller than that of the first group of jacking devices;
and S7, alternately adjusting the jacking heights of the first group of jacking devices and the second group of jacking devices to enable the large steel structure to be placed on the ground.
2. A method for positioning a large steel structure according to claim 1, wherein the step S1 of performing finite element calculation on the large steel structure comprises the following specific steps:
firstly, estimating the stress point of a large steel structure according to the weight of the large steel structure;
and then, analyzing the stress condition of each stress point by using finite element analysis software, and if the large steel structure deforms and the deformation exceeds the load deformation, increasing the number of the stress points or changing the position of the estimated stress point.
3. A method for lowering a large steel structure according to claim 1 or 2, wherein the large steel structure is a steel structure having a floor space of 25 to 600 square meters and a weight of not less than 200 tons.
4. The landing method of a large steel structure according to claim 1, wherein the step S7 of alternately adjusting the lifting heights of the first and second sets of lifting devices comprises the following steps:
firstly, lowering the jacking height of a first group of jacking devices to make the jacking height lower than that of a second group of jacking devices, so that the second group of jacking devices supports the large-scale steel structure;
then, lowering the jacking height of the second group of jacking devices to enable the jacking height to be lower than that of the first group of jacking devices, so that the first group of jacking devices support the large-scale steel structure;
and repeating the steps until the large-scale steel structure is placed on the ground.
5. A method of landing a large steel structure according to claim 1, wherein the segmented platform is a gantry or pier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110557162.5A CN113536618A (en) | 2021-05-21 | 2021-05-21 | Positioning method of large steel structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110557162.5A CN113536618A (en) | 2021-05-21 | 2021-05-21 | Positioning method of large steel structure |
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| Publication Number | Publication Date |
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| CN113536618A true CN113536618A (en) | 2021-10-22 |
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| CN202110557162.5A Pending CN113536618A (en) | 2021-05-21 | 2021-05-21 | Positioning method of large steel structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116351663A (en) * | 2021-12-28 | 2023-06-30 | 中国石油天然气集团有限公司 | Barrel lifting method in single-point mooring buoy coating process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201228445Y (en) * | 2008-06-25 | 2009-04-29 | 武汉一冶钢结构有限责任公司 | Post apparatus for large structure body high altitude slipping installation apparatus |
| CN102518312A (en) * | 2011-12-28 | 2012-06-27 | 中国海洋石油总公司 | Synchronous jacking accurate in-place installation process for large equipment |
| CN104555493A (en) * | 2014-11-27 | 2015-04-29 | 中国海洋石油总公司 | Wharf transportation and loading/unloading process for slender structure |
| WO2019047355A1 (en) * | 2017-09-11 | 2019-03-14 | 青岛武船麦克德莫特海洋工程有限公司 | Integrated construction and installation method for upper part processing module of floating production facility |
| CN110792265A (en) * | 2019-10-31 | 2020-02-14 | 中建六局第三建筑工程有限公司 | Integral synchronous jacking equipment for large-span combined type overweight eccentric slope angle steel structure |
-
2021
- 2021-05-21 CN CN202110557162.5A patent/CN113536618A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201228445Y (en) * | 2008-06-25 | 2009-04-29 | 武汉一冶钢结构有限责任公司 | Post apparatus for large structure body high altitude slipping installation apparatus |
| CN102518312A (en) * | 2011-12-28 | 2012-06-27 | 中国海洋石油总公司 | Synchronous jacking accurate in-place installation process for large equipment |
| CN104555493A (en) * | 2014-11-27 | 2015-04-29 | 中国海洋石油总公司 | Wharf transportation and loading/unloading process for slender structure |
| WO2019047355A1 (en) * | 2017-09-11 | 2019-03-14 | 青岛武船麦克德莫特海洋工程有限公司 | Integrated construction and installation method for upper part processing module of floating production facility |
| CN110792265A (en) * | 2019-10-31 | 2020-02-14 | 中建六局第三建筑工程有限公司 | Integral synchronous jacking equipment for large-span combined type overweight eccentric slope angle steel structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116351663A (en) * | 2021-12-28 | 2023-06-30 | 中国石油天然气集团有限公司 | Barrel lifting method in single-point mooring buoy coating process |
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