CN111382538A - Spherical net rack suspension assembly integral lifting construction method - Google Patents
Spherical net rack suspension assembly integral lifting construction method Download PDFInfo
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- CN111382538A CN111382538A CN202010217527.5A CN202010217527A CN111382538A CN 111382538 A CN111382538 A CN 111382538A CN 202010217527 A CN202010217527 A CN 202010217527A CN 111382538 A CN111382538 A CN 111382538A
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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
Abstract
The invention discloses a spherical net rack hanging, assembling and integral lifting construction method, and belongs to the technical field of net rack structure construction. The method comprises the following steps: step 1: establishing a grid structure finite element analysis model by applying Midas/Gen finite element analysis software according to the composition form of the spherical grid structure; step 2: dividing the splicing and lifting stages or lifting heights of the spherical grid structure according to the analysis and verification result in the step 1 and the actual space size of the structure; step 3, setting a lifting platform and a lifting hoisting point, and installing a hydraulic synchronous lifting system; step 4, after lifting one height, repeatedly carrying out the assembly of the next lifting unit in the step 2 and the lifting process of the next lifting unit in the step 3; step 5, continuously lifting the whole ball structure assembled in the step 4 to a position which is 100-200mm away from the designed elevation; and 6, unloading the hydraulic lifting system step by step. The invention adopts the spherical structure to be assembled in sections and integrally lifted, and has high construction speed, safety and reliability.
Description
Technical Field
The invention relates to the technical field of grid structure construction, in particular to a suspension, assembly and integral lifting construction method for a spherical grid.
Background
Along with the improvement of the scientific and technical level of the present generation, the diversified spatial grid structure of molding is more and more applied to in the real life, as a grid structure, and the spherical grid structure in space is because of its height is straggly, and the pattern is novel etc. and is applied to modern building gradually a bit more, but because spherical grid structure whole span is big, the dead weight is heavy, and the installation technology is complicated, and the work progress requires the precision high, and dangerous reason such as big is restraining spherical grid structure's development always. Therefore, how to adopt a construction method which is always efficient and safe to construct aiming at the complex structure is a problem which needs to be solved urgently at the present stage.
Disclosure of Invention
1. Problems to be solved
Aiming at the defects and shortcomings in the prior art, the invention provides a spherical net rack suspension, assembly and integral lifting construction method, which adopts a spherical structure to assemble and integrally lift in a segmented manner, and has high construction speed, safety and reliability.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a spherical net rack suspension assembly integral lifting construction method comprises the following steps:
step 1: according to the composition form of the spherical grid structure, Midas/Gen finite element analysis software is applied to establish a grid structure finite element analysis model, the stress ratio of the rod members formed by the spherical grid structure, the distribution of internal force of lifting points and the deformation result under the load effect are obtained, then, ANSYS is used for establishing a finite element analysis model in the whole structure lifting process, the stress ratio and the deformation result of the whole spherical grid structure under the different load combination effects are obtained, the two combined finite element models are subjected to comparative analysis, and the correctness of simulation analysis is verified;
step 2: dividing splicing and lifting stages or lifting heights of the spherical grid structure according to the analysis and verification result in the step 1 and the actual space size of the structure, sequentially splicing spheres from outside to inside according to the divided stages or heights, and sequentially splicing the sphere-forming structural truss on the ground right below the projection plane of the structural truss into a plurality of lifting units;
step 3, setting a lifting platform and lifting hoisting points, installing a hydraulic synchronous lifting system, setting a temporary reinforcing structure, and sequentially lifting the lifting units according to the lifting heights divided in the step 2;
step 4, after lifting one height, repeating the assembling of the next lifting unit in the step 2 and the lifting process of the next lifting unit in the step 3 until the structure is assembled into a complete spherical structure;
step 5, continuously lifting the whole ball structure assembled in the step 4 to a position which is 200mm away from the designed elevation, stopping lifting, measuring the self height and the relative height utilization of each lifting point, carrying out vertical direction fine adjustment on each lifting point by a hydraulic synchronous lifting system to enable each lifting point to reach the designed position, and then carrying out post-installation rod piece installation;
and 6, unloading the hydraulic lifting system step by step, and removing the lifting system and temporary processing measures after transferring the load to the supporting upright columns on the two sides.
Furthermore, each lifting unit in step 2 has a height 1/4 corresponding to the full height of the sphere.
Furthermore, the lifting platform in the step 3 is arranged on the fixed supporting columns at two sides of the spherical structure; the lifting points are symmetrically arranged on the lifting platform, and the lifting points are 4 groups; the hydraulic synchronous lifting system comprises a hydraulic lifter, a steel strand, a special ground anchor and a computer synchronous system.
Furthermore, before the assembling and lifting process of the next lifting unit in the step 4, the data of the lifting height of the previous lifting unit, the stress of each lifting point and the stability of the lifting platform are monitored and corrected.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
according to the spherical net rack hanging, assembling and integral lifting construction method, the spherical steel net rack structure is constructed in sections, and hydraulic lifting equipment is utilized to lift a part of the whole spherical steel structure when each part is lifted, so that the whole spherical steel structure is always in a suspended state with balanced stress during construction, the influence of stress and stress deformation on structural members caused by the fact that the spherical steel structure is hoisted after ground assembling due to dead weight is effectively solved, meanwhile, the problem that the size of the structural members is difficult to position when the spherical steel structure is assembled in high altitude is effectively solved, the mounting precision of the spherical net rack structure is improved, and the safety of the mounting process is effectively guaranteed.
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 spherical net rack hanging, assembling and integral lifting construction method comprises the following steps:
step 1: according to the composition form of the spherical grid structure, Midas/Gen finite element analysis software is applied to establish a grid structure finite element analysis model, the stress ratio of the rod members formed by the spherical grid structure, the distribution of internal force of lifting points and the deformation result under the load effect are obtained, then, ANSYS is used for establishing a finite element analysis model in the whole structure lifting process, the stress ratio and the deformation result of the whole spherical grid structure under the different load combination effects are obtained, the two combined finite element models are subjected to comparative analysis, and the correctness of simulation analysis is verified;
step 2: dividing splicing and lifting stages or lifting heights of the spherical grid structure according to the analysis and verification result in the step 1 and the actual space size of the structure, sequentially splicing spheres from outside to inside according to the divided stages or heights, and sequentially splicing the sphere-forming structural truss on the ground right below the projection plane of the structural truss into a plurality of lifting units;
step 3, setting a lifting platform and lifting hoisting points, installing a hydraulic synchronous lifting system, setting a temporary reinforcing structure, and sequentially lifting the lifting units according to the lifting heights divided in the step 2;
step 4, after lifting one height, repeating the assembling of the next lifting unit in the step 2 and the lifting process of the next lifting unit in the step 3 until the structure is assembled into a complete spherical structure;
step 5, continuously lifting the whole ball structure assembled in the step 4 to a position which is 200mm away from the designed elevation, stopping lifting, measuring the self height and the relative height utilization of each lifting point, carrying out vertical direction fine adjustment on each lifting point by a hydraulic synchronous lifting system to enable each lifting point to reach the designed position, and then carrying out post-installation rod piece installation;
and 6, unloading the hydraulic lifting system step by step, and removing the lifting system and temporary processing measures after transferring the load to the supporting upright columns on the two sides.
Each lifting unit in step 2 is 1/4 with the full height of the sphere.
The lifting platform in the step 3 is arranged on the fixed supporting columns at two sides of the spherical structure; the lifting points are symmetrically arranged on the lifting platform, and the lifting points are 4 groups; the hydraulic synchronous lifting system comprises a hydraulic lifter, a steel strand, a special ground anchor and a computer synchronous system.
And 4, before the assembling and lifting process of the next lifting unit in the step 4, monitoring and correcting the lifting height of the previous lifting unit, the stress of each lifting point and the stability of the lifting platform.
The invention adopts the sectional construction of the spherical steel net rack structure, utilizes hydraulic lifting equipment to lift one part every time, so that the whole spherical steel structure is always in a suspended state with balanced stress during construction, effectively solves the influence of stress and stress deformation generated when the spherical steel structure is hoisted after being assembled on the ground due to self weight on structural members, also effectively solves the problem of difficult size positioning of the structural members during high-altitude assembly of the spherical steel structure, improves the installation precision of the spherical net rack structure, and effectively ensures the safety of the installation process.
The present 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 present 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. A spherical net rack suspension assembly integral lifting construction method is characterized in that: the method comprises the following steps:
step 1: according to the composition form of the spherical grid structure, Midas/Gen finite element analysis software is applied to establish a grid structure finite element analysis model, the stress ratio of the rod members formed by the spherical grid structure, the distribution of internal force of lifting points and the deformation result under the load effect are obtained, then, ANSYS is used for establishing a finite element analysis model in the whole structure lifting process, the stress ratio and the deformation result of the whole spherical grid structure under the different load combination effects are obtained, the two combined finite element models are subjected to comparative analysis, and the correctness of simulation analysis is verified;
step 2: dividing splicing and lifting stages or lifting heights of the spherical grid structure according to the analysis and verification result in the step 1 and the actual space size of the structure, sequentially splicing spheres from outside to inside according to the divided stages or heights, and sequentially splicing the sphere-forming structural truss on the ground right below the projection plane of the structural truss into a plurality of lifting units;
step 3, setting a lifting platform and lifting hoisting points, installing a hydraulic synchronous lifting system, setting a temporary reinforcing structure, and sequentially lifting the lifting units according to the lifting heights divided in the step 2;
step 4, after lifting one height, repeating the assembling of the next lifting unit in the step 2 and the lifting process of the next lifting unit in the step 3 until the structure is assembled into a complete spherical structure;
step 5, continuously lifting the whole ball structure assembled in the step 4 to a position which is 200mm away from the designed elevation, stopping lifting, measuring the self height and the relative height utilization of each lifting point, carrying out vertical direction fine adjustment on each lifting point by a hydraulic synchronous lifting system to enable each lifting point to reach the designed position, and then carrying out post-installation rod piece installation;
and 6, unloading the hydraulic lifting system step by step, and removing the lifting system and temporary processing measures after transferring the load to the supporting upright columns on the two sides.
2. The spherical net rack suspension, assembly and integral lifting construction method according to claim 1, characterized in that: each lifting unit in step 2 is 1/4 with the full height of the sphere.
3. The spherical net rack suspension, assembly and integral lifting construction method according to claim 1, characterized in that: the lifting platform in the step 3 is arranged on the fixed supporting columns at two sides of the spherical structure; the lifting points are symmetrically arranged on the lifting platform, and the lifting points are 4 groups; the hydraulic synchronous lifting system comprises a hydraulic lifter, a steel strand, a special ground anchor and a computer synchronous system.
4. The spherical net rack suspension, assembly and integral lifting construction method according to claim 1, characterized in that: and 4, before the assembling and lifting process of the next lifting unit in the step 4, monitoring and correcting the lifting height of the previous lifting unit, the stress of each lifting point and the stability of the lifting platform.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112035936A (en) * | 2020-09-07 | 2020-12-04 | 中国十七冶集团有限公司 | Steel truss lifting construction method based on BIM |
| 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 |
| CN113323406A (en) * | 2021-06-11 | 2021-08-31 | 上海宝冶集团有限公司 | Large-weight ship-shaped steel structure integral hoisting structure based on ANSYS and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532767A (en) * | 2018-05-09 | 2018-09-14 | 中建七局安装工程有限公司 | Lifting construction method after space Reticulated dome is first pushed up by ring expansion |
| CN108678180A (en) * | 2018-05-09 | 2018-10-19 | 中建七局安装工程有限公司 | Space Reticulated dome ladder lifting construction method |
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2020
- 2020-03-25 CN CN202010217527.5A patent/CN111382538B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108532767A (en) * | 2018-05-09 | 2018-09-14 | 中建七局安装工程有限公司 | Lifting construction method after space Reticulated dome is first pushed up by ring expansion |
| CN108678180A (en) * | 2018-05-09 | 2018-10-19 | 中建七局安装工程有限公司 | Space Reticulated dome ladder lifting construction method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112035936A (en) * | 2020-09-07 | 2020-12-04 | 中国十七冶集团有限公司 | Steel truss lifting construction method based on BIM |
| 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 |
| CN113323406A (en) * | 2021-06-11 | 2021-08-31 | 上海宝冶集团有限公司 | Large-weight ship-shaped steel structure integral hoisting structure based on ANSYS and construction method thereof |
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