CN111444650B - Integral lifting construction method for large-span net rack roof structure - Google Patents
Integral lifting construction method for large-span net rack roof structure Download PDFInfo
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- CN111444650B CN111444650B CN202010217293.4A CN202010217293A CN111444650B CN 111444650 B CN111444650 B CN 111444650B CN 202010217293 A CN202010217293 A CN 202010217293A CN 111444650 B CN111444650 B CN 111444650B
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 241001139947 Mida Species 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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
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Abstract
The invention discloses an integral lifting construction method for a large-span net rack roof structure, and belongs to the technical field of roof structure construction. The method comprises the following steps: step 1: a scheme is drawn up; step 2: respectively carrying out construction simulation analysis of a lifting stage and construction simulation analysis of a lifting stage of the whole area on each lifting area by using Midas/Gen finite element analysis software; and step 3: assembling the roof grid structure according to the determined construction scheme in the step 2; and 4, step 4: arranging a lifting platform and lifting hoisting points in each lifting area; and 5: tensioning the steel strand to enable the steel strand to be stressed uniformly; step 6: loading and synchronously lifting the net rack roof structure to a position 100-200mm away from the designed elevation in a grading manner; and 7: and (4) unloading the hydraulic lifting system step by step, transferring the load to the supporting columns on the two sides, and then removing the lifting equipment and the temporary reinforcing structure to complete the integral lifting of the structure. The invention adopts the net rack roof structure to be assembled in sections and then integrally lifted, and has high construction speed, safety and reliability.
Description
Technical Field
The invention relates to the technical field of roof structure construction, in particular to a construction method for integrally lifting a large-span net rack roof structure.
Background
Along with the improvement of modern science and technology level, the large-span steel construction is more and more applied to in the real life, like large-scale gymnasium, theater etc.. As one of large-span steel structures, grid frame roof grid structures are also increasingly applied to large-scale projects such as stations and ports. The construction and installation methods commonly used for the large-span steel structure at present mainly comprise two types, one type is that the large-span steel structure is directly assembled at a high-altitude design installation position or is assembled at high altitude and then is glidingly moved to the design position, such as a high-altitude bulk method, a high-altitude gliding method and the like; the other type is that the building blocks are assembled on the ground and then are installed at the designed position step by step, such as a sectional hoisting method. The methods have the disadvantages of complex process, low construction efficiency, high safety protection measure requirement and low economy.
Disclosure of Invention
1. Problems to be solved
Aiming at the defects and shortcomings in the prior art, the invention provides a construction method for integrally lifting a large-span net rack roof structure.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a construction method for integrally lifting a large-span net rack roof structure comprises the following steps:
step 1: a scheme is drawn up, lifting areas and lifting stages are divided according to the composition form of the roof, and the construction design of lifting points is carried out;
and 2, step: respectively carrying out construction simulation analysis of a lifting stage and construction simulation analysis of a lifting stage of the whole area on each lifting area by applying Midas/Gen finite element analysis software, wherein the construction simulation analysis comprises analyzing whether the structural stress ratio and the deformation meet the requirements or not, and checking whether the design of lifting points is reasonable or not; then, carrying out finite element analysis on the whole lifting process of the grid structure roof structure by using Midas/Gen finite element analysis software, and analyzing whether the maximum vertical displacement of the grid structure and the stress of the rod piece in the whole lifting process meet the standard requirements or not, thereby verifying the feasibility of the scheme and determining the construction scheme;
and 3, step 3: assembling the roof grid structure according to the determined construction scheme in the step 2, wherein the assembling process adopts orthographic projection in-situ assembling, and the assembling sequence is carried out from the middle area to the peripheral area in sequence according to the divided lifting areas until a complete roof structure is assembled;
and 4, step 4: arranging a lifting platform and lifting points in each lifting area, installing hydraulic synchronous lifting equipment, steel strands and the like, arranging a temporary reinforcing structure, installing a temporary lifting appliance at the position of the lifting area structure corresponding to the lifting points, and connecting the temporary lifting appliance with the lifting points through special ground anchors and the steel strands;
and 5: tensioning the steel strand to enable the steel strand to be stressed uniformly, checking whether a lifting structure and a lifting appliance meet design requirements, and debugging a hydraulic synchronous lifting system;
step 6: loading the synchronous lifting net rack roof structure in a grading manner to a position 100-200mm away from a designed elevation, stopping lifting, measuring the position of each lifting point, comparing and checking with a designed installation position, finely adjusting each lifting point in the vertical direction by using a hydraulic synchronous lifting system to enable each lifting point to reach the designed position, and then installing a post-installed rod piece;
and 7: and (4) unloading the hydraulic lifting system step by step, transferring the load to the supporting columns on the two sides, and then removing the lifting equipment and the temporary reinforcing structure to complete the integral lifting of the structure.
Furthermore, the design of the lifting point structure in the step 1 is designed according to the actual supporting and stress conditions of each lifting point, and comprises the types of the lifters, the number of the steel strands and the like.
Furthermore, the finite element analysis of the lifting process in step 2 further includes checking and calculating the bearing capacity and stability of the lifting platform, the lifting sling, the temporary reinforcing structure and the like.
Furthermore, the lifting platform in the step 3 is arranged on the fixed supporting columns on two sides of the grid structure; the lifting hoisting point is arranged on the lifting platform.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
according to the construction method for integrally lifting the large-span net rack roof structure, the net rack roof structure is assembled on the ground in a partition mode, the whole body is lifted at one time, the construction speed is improved, the construction cost is reduced, meanwhile, finite element analysis software is used for conducting construction simulation analysis on the states of stress, deformation and the like of the rod piece and the structure in the lifting process, construction safety is guaranteed, feasibility is greatly improved, and construction is facilitated.
Drawings
FIG. 1 is a construction flow chart of the present invention.
Detailed Description
The invention will be further described with reference to specific embodiments and the accompanying drawings in which:
example 1
The integral lifting construction method for the large-span net rack roof structure comprises the following steps:
step 1: a scheme is drawn up, lifting areas and lifting stages are divided according to the composition form of the roof, and the construction design of lifting points is carried out;
step 2: respectively carrying out construction simulation analysis of a lifting stage and construction simulation analysis of a lifting stage of the whole area on each lifting area by using Midas/Gen finite element analysis software, wherein the construction simulation analysis comprises the steps of analyzing whether the structural stress ratio and the deformation meet the requirements or not, and checking whether the design of a lifting point is reasonable or not; then, carrying out finite element analysis on the whole lifting process of the grid structure roof structure by applying Midas/Gen finite element analysis software, and analyzing whether the maximum vertical displacement of the grid structure and the stress of the rod piece meet the standard requirements in the whole lifting process, thereby verifying the feasibility of the scheme and determining the construction scheme;
and step 3: assembling the roof grid structure according to the determined construction scheme in the step 2, wherein the assembling process adopts orthographic projection in-situ assembling, and the assembling sequence is sequentially carried out from the middle area to the peripheral area according to the divided lifting areas until a complete roof structure is assembled;
and 4, step 4: arranging a lifting platform and lifting points in each lifting area, installing hydraulic synchronous lifting equipment, steel strands and the like, arranging a temporary reinforcing structure, installing a temporary lifting appliance at the position of the lifting area structure corresponding to the lifting points, and connecting the temporary lifting appliance with the lifting points through special ground anchors and the steel strands;
and 5: tensioning the steel strand to enable the steel strand to be stressed uniformly, checking whether a lifting structure and a lifting appliance meet design requirements, and debugging a hydraulic synchronous lifting system;
step 6: loading the synchronous lifting net rack roof structure in a grading manner to a position 100-200mm away from the designed elevation, stopping lifting, measuring the position of each lifting point, comparing the position with the designed installation position, checking, performing vertical fine adjustment on each lifting point by using a hydraulic synchronous lifting system to enable each lifting point to reach the designed position, and then performing post-installation of rod pieces;
and 7: and (4) unloading the hydraulic lifting system step by step, transferring the load to the supporting columns on the two sides, and then removing the lifting equipment and the temporary reinforcing structure to complete the integral lifting of the structure.
The lifting point structure design in the step 1 is designed according to the actual supporting and stress conditions of each lifting point, and comprises the types of the lifters, the number of the steel strands and the like.
The finite element analysis in the lifting process in the step 2 further comprises checking and calculating the bearing capacity and stability of the lifting platform, the lifting sling, the temporary reinforcing structure and the like.
The lifting platform in the step 3 is arranged on the fixed supporting columns on the two sides of the grid structure; the lifting hoisting point is arranged on the lifting platform.
The invention adopts the ground partition assembly of the net rack roof truss structure, the whole structure is lifted at one time, the construction speed is improved, the construction cost is reduced, meanwhile, finite element analysis software is used for carrying out construction simulation analysis on the stress, deformation and other states of the rod piece and the structure in the lifting process, the construction safety is ensured, the feasibility is greatly improved, and the construction is convenient.
The invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the invention, to which the actual method is not limited. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (4)
1. The utility model provides a whole construction method that promotes of large-span rack room lid structure which characterized in that: the method comprises the following steps:
step 1: a scheme is drawn up, lifting areas and lifting stages are divided according to the composition form of the roof, and the construction design of lifting points is carried out;
and 2, step: respectively carrying out construction simulation analysis of a lifting stage and construction simulation analysis of a lifting stage of the whole area on each lifting area by applying Midas/Gen finite element analysis software, wherein the construction simulation analysis comprises analyzing whether the structural stress ratio and the deformation meet the requirements or not, and checking whether the design of lifting points is reasonable or not; then, carrying out finite element analysis on the whole lifting process of the grid structure roof structure by using Midas/Gen finite element analysis software, and analyzing whether the maximum vertical displacement of the grid structure and the stress of the rod piece in the whole lifting process meet the standard requirements or not, thereby verifying the feasibility of the scheme and determining the construction scheme;
and 3, step 3: assembling the roof grid structure according to the determined construction scheme in the step 2, wherein the assembling process adopts orthographic projection in-situ assembling, and the assembling sequence is sequentially carried out from the middle area to the peripheral area according to the divided lifting areas until a complete roof structure is assembled;
and 4, step 4: arranging a lifting platform and lifting points in each lifting area, installing hydraulic synchronous lifting equipment, steel strands and the like, arranging a temporary reinforcing structure, installing a temporary lifting appliance at the position of the lifting area structure corresponding to the lifting points, and connecting the temporary lifting appliance with the lifting points through special ground anchors and the steel strands;
and 5: tensioning the steel strand to enable the steel strand to be stressed uniformly, checking whether a lifting structure and a lifting appliance meet design requirements, and debugging a hydraulic synchronous lifting system;
step 6: loading the synchronous lifting net rack roof structure in a grading manner to a position 100-200mm away from the designed elevation, stopping lifting, measuring the position of each lifting point, comparing the position with the designed installation position, checking, performing vertical fine adjustment on each lifting point by using a hydraulic synchronous lifting system to enable each lifting point to reach the designed position, and then performing post-installation of rod pieces;
and 7: and (4) unloading the hydraulic lifting system step by step, transferring the load to the supporting columns on the two sides, and then removing the lifting equipment and the temporary reinforcing structure to complete the integral lifting of the structure.
2. The integral lifting construction method for the large-span net rack roof structure according to claim 1, characterized in that: the lifting point structure design in the step 1 is designed according to the actual supporting and stress conditions of each lifting point, and comprises the types of the lifters, the number of the steel strands and the like.
3. The integral lifting construction method of the large-span net rack roof structure according to claim 1, characterized in that: the finite element analysis of the lifting process in the step 2 further comprises checking and calculating the bearing capacity and stability of a lifting platform, a lifting sling, a temporary reinforcing structure and the like.
4. The integral lifting construction method of the large-span net rack roof structure according to claim 1, characterized in that: the lifting platform in the step 3 is arranged on the fixed supporting columns on the two sides of the grid structure; the lifting hoisting point is arranged on the lifting platform.
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| CN202010217293.4A CN111444650B (en) | 2020-03-25 | 2020-03-25 | Integral lifting construction method for large-span net rack roof structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112374344A (en) * | 2020-10-29 | 2021-02-19 | 上海宝冶冶金工程有限公司 | Method for mounting top of large-scale gas tank in steel mill |
| CN112554345A (en) * | 2020-11-27 | 2021-03-26 | 中国二冶集团有限公司 | Ground splicing and integral lifting construction method for large-span welding ball net rack |
| CN113268904B (en) * | 2021-05-08 | 2022-04-01 | 中铁建工集团有限公司 | Risk control method for full reverse construction period of single-layer flat plate reticulated shell roof structure |
| CN113737957A (en) * | 2021-09-13 | 2021-12-03 | 中铁十八局集团有限公司 | Construction method of large-span hangar |
| CN113738124A (en) * | 2021-10-14 | 2021-12-03 | 中铁六局集团有限公司 | Lifting construction method for large-span steel structure net rack |
| CN113944273A (en) * | 2021-10-28 | 2022-01-18 | 江苏沪宁钢机股份有限公司 | Reverse construction method of single-layer flat plate reticulated shell roof structure |
| CN114858379A (en) * | 2022-04-01 | 2022-08-05 | 中铁二十局集团第二工程有限公司 | A method for enhancing the wind resistance of metal roof panels |
| CN114996831B (en) * | 2022-08-04 | 2022-11-25 | 北京建工集团有限责任公司 | Lean construction method of large-span overhanging ridge line hyperbolic anti-arch oblique grid structure |
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| CN103696494A (en) * | 2013-12-11 | 2014-04-02 | 中冶天工上海十三冶建设有限公司 | Computer control hydraulic synchronous hoisting construction method for complex space truss structure |
| CN105064697A (en) * | 2015-07-15 | 2015-11-18 | 安徽跨宇钢结构网架工程有限公司 | Roof grid elevating method |
| CN106812328A (en) * | 2015-11-27 | 2017-06-09 | 天津三建建筑工程有限公司 | The overall two step lifting construction methods of a string prestressed steel structure rack with hanging layer |
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- 2020-03-25 CN CN202010217293.4A patent/CN111444650B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696494A (en) * | 2013-12-11 | 2014-04-02 | 中冶天工上海十三冶建设有限公司 | Computer control hydraulic synchronous hoisting construction method for complex space truss structure |
| CN105064697A (en) * | 2015-07-15 | 2015-11-18 | 安徽跨宇钢结构网架工程有限公司 | Roof grid elevating method |
| CN106812328A (en) * | 2015-11-27 | 2017-06-09 | 天津三建建筑工程有限公司 | The overall two step lifting construction methods of a string prestressed steel structure rack with hanging layer |
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