CN115977401A - High-altitude installation method for steel structure - Google Patents
High-altitude installation method for steel structure Download PDFInfo
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- CN115977401A CN115977401A CN202310190730.1A CN202310190730A CN115977401A CN 115977401 A CN115977401 A CN 115977401A CN 202310190730 A CN202310190730 A CN 202310190730A CN 115977401 A CN115977401 A CN 115977401A
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Abstract
The invention provides a high-altitude installation method of a steel structure, which comprises the following specific steps of: carrying out steel structure design modeling; carrying out finite element stress analysis on the steel structure model; setting steel structure tensioning and making deformation control measures according to the stress analysis result; detecting the quality of the steel structure by adopting a three-dimensional laser scanner; installing column base anchor bolts and installing steel columns; carrying out on-site hoisting welding on parts and components on the concrete inner truss in a tower crane mode, carrying out ground splicing molding on the cantilever truss, and then integrally hoisting the cantilever truss, wherein the cantilever truss is connected with the concrete inner truss by adopting full bolts; monitoring the deformation of the steel structure in the hoisting process by adopting a three-dimensional laser scanner; the spatial installation position of the steel structure is positioned by adopting a BIM and laser scanning mode so as to be convenient for accurate and quick high-altitude hoisting, and the problems of accurate manufacture and installation of the high-altitude cantilever type truss are solved.
Description
Technical Field
The invention relates to high-altitude installation of a steel structure, in particular to a high-altitude installation method of a steel structure.
Background
As a building type, a steel structure is widely used because it has a uniform structure, high strength, good shape, toughness, and dense toughness, compared to other structures. With the rapid development of the industry in China, steel structures are higher and higher, the scale and the span are larger and the modeling is more and more complex, more large-span stadiums, high-rise buildings, structures and small and medium-sized buildings adopt steel structures, and the special-shaped steel structures bring great difficulty to construction, so that construction enterprises are forced to have continuous breakthrough and innovation in construction management and construction technology.
The high-altitude overhanging type steel structure pedestrian bridge is characterized in that due to the fact that special hoisting construction is conducted on a steel structure under unstable factors such as a water channel and road wind speed, a corridor of the high-altitude overhanging type steel structure pedestrian bridge is different from a traditional corridor, and the fact that manufacturing and installation accuracy of an overhanging truss are guaranteed is a key problem.
Disclosure of Invention
In order to solve the problems, the invention provides a high-altitude installation method for a steel structure, which aims to solve the problem of accurate manufacture and installation of a high-altitude cantilever truss.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a high-altitude installation method for a steel structure comprises the following specific steps:
carrying out steel structure design modeling;
carrying out finite element stress analysis on the steel structure model;
setting steel structure tensioning and making deformation control measures according to the stress analysis result;
detecting the quality of the steel structure by adopting a three-dimensional laser scanner;
performing column base anchor bolt installation and steel column installation;
carrying out on-site hoisting welding on parts and components on the concrete inner truss in a tower crane mode, carrying out integral hoisting on the cantilever truss after ground splicing molding, and connecting the cantilever truss with the concrete inner truss by adopting a full bolt;
monitoring the deformation of the steel structure in the hoisting process by adopting a three-dimensional laser scanner;
and the spatial installation position of the steel structure is positioned by adopting a BIM and laser scanning mode so as to facilitate accurate and quick high-altitude hoisting.
Further, the installation of the column base anchor bolt comprises the following steps:
encrypting the axis and the elevation control point on site according to the original axis control point and the elevation control point; measuring and releasing an axis positioning plate and at least two elevation control points of each group of foundation bolts according to a control line, and marking on a bottom plate of the bearing platform;
manufacturing a positioning bracket, and fixing the foundation bolt and the positioning bracket by adopting spot welding;
placing the positioning bracket and the foundation bolt group on a steel bar at the bottom of the bearing platform, welding and fixing the positioning bracket and the steel bar at the bottom of the bearing platform after measuring and positioning by a total station, and measuring and adjusting the verticality and elevation of the foundation bolt;
and (3) coating butter on the threaded part of the foundation bolt, wrapping the threaded part with soft cloth, then sleeving a steel sleeve, and performing reinforcement construction, formwork support and concrete pouring on the upper part of the cushion cap.
Further, the steel column is provided with
The method comprises the following specific steps:
the steel columns are processed in sections in a factory and are transported to a construction site according to the installation sequence;
paying off, leveling and cleaning the steel column foundation concrete;
mounting an adjusting gasket and an adjusting nut for adjusting the positioning of the steel column on the foundation bolt;
hoisting the steel column component to the foundation bolt to be in place;
and performing secondary grouting on the bottom of the steel column.
Further, the hoisting of the steel column member to the anchor bolt in place comprises the steps of:
clamping by adopting a special lifting appliance to prevent the lifting lug from deforming during lifting;
before hoisting, a sleeper and a support jig frame are arranged on the lower portion of the steel column so as to facilitate installation of the ladder stand and the construction platform;
during hoisting, the lifting appliance is moved to the bottom section of the steel column according to the hoisting height so as to avoid the dragging phenomenon of the bottom end of the steel column on the ground.
Further, the hoisting of the steel column member to the foundation bolt in place further comprises the steps of:
stopping the machine stably when the steel column is lifted to the position above the steel column;
after aligning the bolt holes and the cross lines, slowly falling down to align the center lines of the four sides of the steel column with the cross axis of the foundation;
before a crane releases a hook, theodolites are arranged in two vertical axis directions of the steel column at the same time, and preliminary measurement and correction are carried out on the steel column;
and after the deviation is corrected to be controlled within the range allowed by the standard, the bolt is screwed.
Further, adopt three-dimensional laser scanner to carry out the monitoring that steel construction deformation in hoist and mount process includes: displacement monitoring of the steel structure, inclination monitoring of the steel structure and settlement monitoring of the steel structure.
Furthermore, the displacement monitoring of the steel structure refers to monitoring the steel structure by adopting a three-dimensional laser scanner according to a horizontal displacement method, and deeply analyzing data so as to more comprehensively master the specific condition of the horizontal displacement of the steel structure.
Further, the slope monitoring of steel construction refers to the atress characteristics and the site environment of considering the steel construction in the construction, sets up two survey burets respectively in the both sides of steel construction, and the degree of depth of burying underground of surveying buret is the twice of steel column basis excavation depth, then uses high accuracy sliding type measuring apparatu to monitor to more master the change of steel construction in different time quantums, thereby obtain datum point horizontal displacement and calculate the slope data of steel construction from this.
The invention provides a high-altitude installation method of a steel structure, which comprises the following specific steps of: carrying out steel structure design modeling; carrying out finite element stress analysis on the steel structure model; setting steel structure tensioning and making deformation control measures according to the stress analysis result; detecting the quality of the steel structure by adopting a three-dimensional laser scanner; performing column base anchor bolt installation and steel column installation; carrying out on-site hoisting welding on parts and components on the concrete inner truss in a tower crane mode, carrying out ground splicing molding on the cantilever truss, and then integrally hoisting the cantilever truss, wherein the cantilever truss is connected with the concrete inner truss by adopting full bolts; monitoring the deformation of the steel structure in the hoisting process by adopting a three-dimensional laser scanner; the spatial installation position of the steel structure is positioned by adopting a BIM and laser scanning mode so as to be convenient for accurate and quick high-altitude hoisting, and the problems of accurate manufacture and installation of the high-altitude overhanging type truss are solved.
Drawings
Fig. 1 is a schematic flow diagram of a high-altitude installation method of a steel structure.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure of the present disclosure. It is to be understood that the embodiments described are only a few embodiments of the present disclosure, and not all embodiments. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Example one
As shown in fig. 1, a schematic flow diagram of a high-altitude installation method for a steel structure is shown, and the method comprises the following specific steps:
carrying out steel structure design modeling;
carrying out finite element stress analysis on the steel structure model, setting steel structure tensioning according to the stress analysis result and establishing deformation control measures;
detecting the quality of the steel structure by adopting a three-dimensional laser scanner;
performing column base anchor bolt installation and steel column installation;
carrying out on-site hoisting welding on parts and components on the concrete inner truss in a tower crane mode, carrying out integral hoisting on the cantilever truss after ground splicing molding, and connecting the cantilever truss with the concrete inner truss by adopting a full bolt;
monitoring the deformation of the steel structure in the hoisting process by adopting a three-dimensional laser scanner;
and the spatial installation position of the steel structure is positioned by adopting a BIM and laser scanning mode so as to facilitate accurate and quick high-altitude hoisting.
In a specific implementation, the modeling for steel structure design includes:
(1) Inputting a model: the model input of Takla may be a three-dimensional method. The three-dimensional modeling adopts a man-machine interaction mode, guides a user to arrange planes and floors of each layer by layer, inputs the layer height to establish a set of data describing the whole structure of the building, has stronger load statistics and conduction calculation engineering, and automatically completes all calculations from the floor slab to the secondary beam, from the secondary beam to the main beam, from the main beam to the bearing column and wall, and then from the upper structure to the foundation in addition to the dead weight, thereby conveniently establishing the load data of the whole building.
(2) Section optimization: on the premise of meeting the specification requirement, the section size with the minimum steel consumption is searched. The model is simplified through software, the optimized constraint variable has 7 factors of the height of a big end and a small end, the width and the thickness of an upper flange and a lower flange and the thickness of a web plate, and the section size with the minimum steel consumption is quickly found in a variation range. The truss optimization can be performed by grouping the rods, and the rods grouped into one group have the same cross section after optimization. The optimization program has high speed and better applicability.
In the concrete implementation, carry out finite element stress analysis to steel structure model, the atress condition of finite element ANSYS check analysis installation status: and checking the stress condition of the steel structure of each construction section by using finite element software, analyzing the stress, setting the tension of the steel structure through a calculation result, taking a deformation control measure, and monitoring the displacement of the truss in the implementation process. Through the whole-process construction simulation of a computer, loading analysis is carried out aiming at all working conditions, the displacement deformation and stress ratio of the structure are checked, and the stress condition of the steel structure under the unfavorable working conditions is accurately calculated so as to control the integral deformation of the member. The displacement data of the column beam joint position is repeatedly monitored and recorded in different construction stages, the influence of the hoisting process and the welding process on the whole structure is reduced, the problem of predicting the structural deformation in advance in the steel structure construction process and the load loading is solved, and a scientific basis can be provided for the whole installation engineering smoothly.
In specific implementation, the installation of the column base anchor bolt comprises the following steps: encrypting the axis and the elevation control point on site according to the original axis control point and the elevation control point; measuring and releasing an axis positioning plate and at least two elevation control points of each group of foundation bolts according to a control line, and marking on a bottom plate of the bearing platform; manufacturing a positioning bracket, and fixing the foundation bolt and the positioning bracket by adopting spot welding; placing the positioning bracket and the foundation bolt group on a steel bar at the bottom of the bearing platform, welding and fixing the positioning bracket and the steel bar at the bottom of the bearing platform after measuring and positioning by a total station, and measuring and adjusting the verticality and elevation of the foundation bolt; and (3) coating butter on the threaded part of the foundation bolt, wrapping the threaded part with soft cloth, then sleeving a steel sleeve, and performing reinforcement construction, formwork support and concrete pouring on the upper part of the cushion cap.
In specific implementation, the specific steps of installing the steel column include: the steel columns are processed in sections in a factory and are transported to a construction site according to the installation sequence; paying off, leveling and cleaning the steel column foundation concrete; mounting an adjusting gasket and an adjusting nut for adjusting the positioning of the steel column on the foundation bolt; hoisting the steel column component to the foundation bolt to be in place; and performing secondary grouting on the bottom of the steel column.
In specific implementation, the hoisting of the steel column member to the foundation bolt in place comprises the following steps: clamping by adopting a special lifting appliance to prevent the lifting lug from deforming during lifting; before hoisting, a sleeper and a support jig frame are arranged on the lower portion of the steel column so as to facilitate installation of a ladder stand and a construction platform; when the steel column is lifted, the lifting appliance is moved to the bottom section of the steel column according to the lifting height so as to avoid the dragging phenomenon of the bottom end of the steel column on the ground.
In specific implementation, the hoisting of the steel column member to the foundation bolt in place further comprises the following steps: stopping the machine stably when the steel column is lifted to the position above the steel column; after aligning the bolt holes and the cross lines, slowly falling down to align the center lines of the four sides of the steel column with the cross axis of the foundation; before the hook of the crane is released, theodolites are arranged in two vertical axis directions of the steel column at the same time, and preliminary measurement and correction are carried out on the steel column; and after the deviation is corrected to be controlled within the range allowed by the specification, the bolt is tightened.
In the concrete implementation, the in-situ parts are hoisted and welded by adopting a tower crane mode for the inner concrete truss, the cantilever truss is integrally hoisted after ground assembling and forming, the cantilever truss is connected with the inner concrete truss by adopting full bolts, a sectional integral hoisting method and a high-altitude bulk method are combined for construction, the high-altitude workload is reduced, ground operation is utilized, the construction quality and safety are ensured, the assembly quality is ensured, the erection of a scaffold is avoided, the occupied area of a construction field is small, conditions are provided for other construction operation installation, the construction period is shortened, the investment cost of safety protection facilities is reduced, the ground transportation frequency of components is reduced, the mechanical cost is saved, the construction period is short, the speed is high, the construction cost is effectively reduced, and the cost control aspect has greater advantages compared with the traditional hoisting process.
In the concrete implementation, adopt three-dimensional laser scanner to carry out the monitoring that the deformation of steel construction in hoist and mount process goes on including: displacement monitoring of the steel structure, inclination monitoring of the steel structure and settlement monitoring of the steel structure. Furthermore, the displacement monitoring of the steel structure refers to monitoring the steel structure by adopting a three-dimensional laser scanner according to a horizontal displacement method, and deeply analyzing data so as to more comprehensively master the specific situation of the horizontal displacement of the steel structure. Further, the slope monitoring of steel construction refers to the atress characteristics and the site environment of considering the steel construction in the construction, sets up two survey burets respectively in the both sides of steel construction, and the degree of depth of burying underground of surveying buret is the twice of steel column basis excavation depth, then uses high accuracy sliding type measuring apparatu to monitor to more master the change of steel construction in different time quantums, thereby obtain datum point horizontal displacement and calculate the slope data of steel construction from this. Monitoring the steel structure settlement: in general, constructors actively use a high-precision measuring instrument and simultaneously adopt a conventional measuring method, so that the settlement condition of a steel structure can be known in the shortest time, and more information can be mastered. The method comprises the steps of scanning a steel structure main body, realizing splicing, contrast detection and the like in Cyclone software, checking construction precision according to a contrast detection three-dimensional chromatogram map, ensuring that steel structure installation meets the standard requirement, and if the construction precision exceeds an allowable threshold value, realizing model modification based on point cloud data in Revit and adjusting the site position so as to guide construction.
In specific implementation, in the process of positioning the spatial installation position of the steel structure by adopting a BIM and laser scanning mode, geometric figure data and image data of a terrain or a complex object are obtained by adopting a non-contact high-speed laser measurement mode. Finally, the acquired point cloud data and the acquired image data are processed by post-processing software, converted into space position coordinates or models in an absolute coordinate system and output in various different formats, so that the requirements of data sources and different applications of a space information database are met, the space position of steel structure installation is ensured to be accurate, the installation efficiency of steel structure construction is greatly improved, and the whole construction process can be reasonably relied on.
Adopt among this technical scheme to have no support mounting means, consequently adopt novel regularization to hang basket construction, the operation face is narrow and small, develops novel regularization for this reason and hangs the basket, through atress computational analysis and three-dimensional construction simulation, strictly control material purchasing link, adopt mill automated processing, solve the high difficult problem of adorning the operation nothing platform of high altitude cantilever steel construction constructor, guarantee construction safety and quality simultaneously. The use requirements of the hanging cage are that the hanging cage A mainly provides a foothold for the operators in suspension operation, and is mainly used for the construction of procedures such as high-altitude spiral installation, welding and the like. B. The dimensions and material specifications of each suspension cage are calculated, and the safety belts of the workers should be hung on the scion fixed structures or safety protection measures outside the suspension cages. C. In the use process of the hanging cage, a falling-preventing rope must be hung. D. The hanging cage does not allow high-carbon copper or threaded copper to be used, the material must use HPB300 round steel, the requirement is light and practical, the welding is flawless, and the preparation can be put into use after the acceptance check is completed.
Meanwhile, the whole construction process adopts the steel structure deepening design and the Internet of things application technology: the technology of the internet of things is applied in the construction process of the steel structure, so that all links of acquisition, transmission, storage, analysis, use and the like of construction data are improved, personnel, materials, machines, products and the like are more closely related to construction management and decision making, information can be further associated with the BIM, the construction efficiency, the product quality and the project innovation capability are improved, and the informatization management level of product manufacturing and project management is improved.
The invention provides a high-altitude installation method of a steel structure, which combines and uses a high-precision intelligent aerial rapid positioning technology, a steel structure hoisting whole-process deformation monitoring technology, a Takla steel structure deepening design and a sectional type integral hoisting technology on the premise of construction drawings, continuously measures in the hoisting whole process, and calculates the stress condition under unfavorable working conditions by adopting finite element ANSYS checking analysis. And then, a three-dimensional laser scanner is adopted for entity measurement, pre-splicing is realized in Cyclone software, comparison and detection are carried out on the pre-spliced three-dimensional construction model, construction precision is checked according to a comparison and detection three-dimensional chromatogram, the steel structure installation is ensured to meet the standard requirement, if the construction precision exceeds an allowable threshold value, model modification is realized in Revit based on point cloud data, real-time positioning is carried out on the aerial steel structure installation according to the modified data, the aerial steel structure installation is spliced into a whole on the ground and integrally hoisted by a hoisting machine, the aerial steel structure is fixed in a falling position after aerial displacement, high-altitude operation is less, welding quality is ensured, safety risk is low, the construction site is not occupied greatly, and cost is low. The whole hoisting process is monitored by a high-precision steel structure hoisting whole-process deformation monitoring technology based on digital close-range photogrammetry, so that the safety of constructors is met, the construction requirements are met, the construction cost is reduced, the cost is saved, and the aims of energy conservation, environmental protection and green construction are fulfilled.
In the description of the present invention, it is to be understood that the terms "intermediate", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature may be "on" the second feature in direct contact with the second feature, or the first and second features may be in indirect contact via an intermediate. "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (8)
1. A high-altitude installation method for a steel structure is characterized by comprising the following specific steps:
carrying out steel structure design modeling;
carrying out finite element stress analysis on the steel structure model;
setting steel structure tensioning and making deformation control measures according to the stress analysis result;
detecting the quality of the steel structure by adopting a three-dimensional laser scanner;
performing column base anchor bolt installation and steel column installation;
carrying out on-site hoisting welding on parts and components on the concrete inner truss in a tower crane mode, carrying out integral hoisting on the cantilever truss after ground splicing molding, and connecting the cantilever truss with the concrete inner truss by adopting a full bolt;
monitoring the deformation of the steel structure in the hoisting process by adopting a three-dimensional laser scanner;
and the spatial installation position of the steel structure is positioned by adopting a BIM and laser scanning mode so as to facilitate accurate and quick high-altitude hoisting.
2. The high-altitude installation method for the steel structure according to claim 1, wherein the installation of the column base anchor bolt comprises the following steps:
encrypting the axis and the elevation control point on site according to the original axis control point and the elevation control point; measuring and releasing an axis positioning plate and at least two elevation control points of each group of foundation bolts according to a control line, and marking on a bottom plate of the bearing platform;
manufacturing a positioning bracket, and fixing the foundation bolt and the positioning bracket by adopting spot welding;
placing the positioning bracket and the foundation bolt group on a steel bar at the bottom of the bearing platform, welding and fixing the positioning bracket and the steel bar at the bottom of the bearing platform after measuring and positioning by a total station, and measuring and adjusting the verticality and elevation of the foundation bolt;
and (3) coating butter on the threaded part of the foundation bolt, wrapping the threaded part with soft cloth, then sleeving a steel sleeve, and performing reinforcement construction, formwork support and concrete pouring on the upper part of the cushion cap.
3. The steel structure high-altitude installation method as claimed in claim 1, wherein the steel column installation method specifically comprises the following steps:
the steel columns are processed in sections in a factory and are transported to a construction site according to the installation sequence;
paying off, leveling and cleaning the steel column foundation concrete;
mounting an adjusting gasket and an adjusting nut for adjusting the positioning of the steel column on the foundation bolt;
hoisting the steel column component to the foundation bolt to be in place;
and performing secondary grouting on the bottom of the steel column.
4. A method of installing steel structural members aloft according to claim 3, wherein the lifting of the steel column members onto the anchor bolts into position comprises the steps of:
clamping by adopting a special lifting appliance to prevent the lifting lug from deforming during lifting;
before hoisting, a sleeper and a support jig frame are arranged on the lower portion of the steel column so as to facilitate installation of a ladder stand and a construction platform;
when the steel column is lifted, the lifting appliance is moved to the bottom section of the steel column according to the lifting height so as to avoid the dragging phenomenon of the bottom end of the steel column on the ground.
5. The method of claim 4, wherein the lifting of the steel column members into position on the anchor bolts further comprises the steps of:
stopping the machine stably when the steel column is lifted to the position above the steel column;
after aligning the bolt holes and the cross lines, slowly falling down to align the center lines of the four sides of the steel column with the cross axis of the foundation;
before a crane releases a hook, theodolites are arranged in two vertical axis directions of the steel column at the same time, and preliminary measurement and correction are carried out on the steel column;
and after the deviation is corrected to be controlled within the range allowed by the specification, the bolt is tightened.
6. The high-altitude installation method for the steel structure according to claim 1, wherein the monitoring of the deformation of the steel structure in the hoisting process by adopting the three-dimensional laser scanner comprises the following steps: displacement monitoring of the steel structure, inclination monitoring of the steel structure and settlement monitoring of the steel structure.
7. The high-altitude installation method for the steel structure according to claim 6, wherein the displacement monitoring of the steel structure is to monitor the steel structure by a three-dimensional laser scanner according to a horizontal displacement method, and deeply analyze data to comprehensively grasp the specific situation of the horizontal displacement of the steel structure.
8. The high-altitude installation method for the steel structure as claimed in claim 6, wherein the inclination monitoring of the steel structure is that two measuring tubes are respectively arranged on two sides of the steel structure in consideration of the stress characteristics and the field environment of the steel structure during construction, the burying depth of the measuring tubes is twice of the excavation depth of the steel column foundation, and then the monitoring is carried out by using a high-precision sliding type measuring instrument so as to facilitate more mastering of the change of the steel structure in different time periods, thereby obtaining the horizontal displacement of the datum point and calculating the inclination data of the steel structure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116816104A (en) * | 2023-04-28 | 2023-09-29 | 重庆苯特钢结构有限公司 | Automatic erection equipment of steel construction |
| CN117113518A (en) * | 2023-10-24 | 2023-11-24 | 北京城建集团有限责任公司 | 9-direction converging space net shell cast steel node accurate installation construction method and cast steel node |
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2023
- 2023-02-28 CN CN202310190730.1A patent/CN115977401A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116816104A (en) * | 2023-04-28 | 2023-09-29 | 重庆苯特钢结构有限公司 | Automatic erection equipment of steel construction |
| CN117113518A (en) * | 2023-10-24 | 2023-11-24 | 北京城建集团有限责任公司 | 9-direction converging space net shell cast steel node accurate installation construction method and cast steel node |
| CN117113518B (en) * | 2023-10-24 | 2024-03-08 | 北京城建集团有限责任公司 | 9-direction converging space net shell cast steel node accurate installation construction method and cast steel node |
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