CN115262973A - Construction method of multidirectional multi-curvature large-span curved surface latticed shell system - Google Patents
Construction method of multidirectional multi-curvature large-span curved surface latticed shell system Download PDFInfo
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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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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/32—Arched structures; Vaulted structures; Folded structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/08—Vaulted roofs
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- 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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- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
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- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
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Abstract
The invention relates to a construction method of a multidirectional multi-curvature large-span curved surface latticed shell system, which comprises the following steps: creating a three-dimensional model of the curved surface reticulated shell system, numbering each component and acquiring the design position coordinates of each component; importing data of the three-dimensional model into a three-dimensional scanner and a total station; assembling each component according to the lofting position of the total station; in the assembling process, a three-dimensional scanner scans each assembled component in real time to obtain the mounting position coordinates of each assembled component, and judges whether the difference value between the mounting position coordinates and the corresponding design position coordinates is greater than a preset deviation value, if so, the mounting position of the component is wrong, and if not, the mounting position of the component is correct; and displaying the judgment result of each component, and detaching and remounting the component with the wrong mounting position. Whether the installation positions of the components are correct or not is judged through calculation, and the installation positions are fed back and adjusted in time, so that the installation precision and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a construction method of a multidirectional multi-curvature large-span curved surface reticulated shell system.
Background
The reticulated shell structure has reasonable stress, light weight and novel structural form, can highlight the beautiful structure and is rich in artistic expressive force, and is increasingly widely applied to building roofs at home and abroad. The latticed shell structure of the medium-span and large-span building roofs increases the surface area and the building space of the roofs due to the curved surface appearance, and the construction treatment, the supporting structure and the construction and the manufacture are all complex.
The utility model provides a problem that how to improve the figurative installation precision of bent shape of large-scale net shell is this application to solve urgently to the continuous change of net shell surface radian to multidirectional multi-curvature large-span curved surface net shell system, and installation accuracy requires more, and at manual welding's in-process, people's naked eye welding is the discovery welding mistake that is difficult timely.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a construction method of a multidirectional multi-curvature large-span curved surface reticulated shell system, so as to solve the problem that welding errors are difficult to find in time by naked eyes of people in manual welding.
In order to achieve the purpose, the invention provides a construction method of a multidirectional multi-curvature large-span curved surface reticulated shell system, which comprises the following steps:
establishing a three-dimensional model of the curved surface reticulated shell system according to a design drawing of the curved surface reticulated shell system, numbering each component of the curved surface reticulated shell system and acquiring a design position coordinate of each component;
importing the data of the three-dimensional model into a three-dimensional scanner and a total station;
assembling each component of the curved surface latticed shell system according to the lofting position of the total station;
in the assembling process, the three-dimensional scanner scans each assembled component in real time to obtain the mounting position coordinate of each assembled component, and judges whether the difference value between the mounting position coordinate and the corresponding design position coordinate is greater than a preset deviation value, if so, the judgment result is that the mounting position of the component is wrong, and if not, the judgment result is that the mounting position of the component is correct;
and displaying the judgment result of each component, and removing and reinstalling the component with the wrong installation position.
The method comprises the steps of creating a three-dimensional model of the curved surface latticed shell system in advance, and obtaining the serial number and the design position coordinate of each component; the total station lofts according to the acquired data of the three-dimensional model, so that the lofting accuracy is improved, the positioning accuracy of the installation position is improved, and the installation position errors are reduced.
The construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is further improved in that after each scanning, the numbers corresponding to the scanned components are traversed, the information of the components with correct installation positions is deleted, and whether the installation positions of the rest components are correct or not is judged.
The construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is further improved in that the three-dimensional model is used for carrying out simulated pre-assembly on each installation scheme, and the appropriate installation scheme is determined through comparative analysis.
The construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is further improved in that when the curved surface latticed shell system is assembled, a first rod piece and a second rod piece are provided, the first rod piece is arc-shaped, and the second rod piece is installed and connected between the corresponding end parts of the first rod pieces to form an arc-shaped square frame body;
providing a plurality of assembled main steel beams, wherein the main steel beams are in a T-shaped straight strip shape, and the main steel beams are arranged between the pair of first rod pieces at intervals;
providing assembled first steel beams, wherein the first steel beams are in a T-shaped curved shape, and a plurality of first steel beams are obliquely installed and connected between two adjacent main steel beams, so that an included angle is formed between the two adjacent first steel beams;
providing assembled secondary steel beams, obliquely installing and connecting a plurality of secondary steel beams between the second rod and a main steel beam adjacent to the second rod to form an included angle between every two adjacent secondary steel beams, and combining the plurality of main steel beams, the plurality of first secondary steel beams and the plurality of second secondary steel beams to form a plurality of curved grid structures;
and splicing and connecting a plurality of square frame bodies on the grid structure according to the design and modeling of the curved reticulated shell system to form the wavy multidirectional multi-curvature large-span curved reticulated shell system.
The construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is further improved in that the square frame body is divided into end parts located at two ends of the square frame body and a middle part located between the two end parts, and at least one main steel beam is located in the end parts;
when the main steel beams positioned in the end part areas are assembled, connecting pieces and assembled connecting sections are provided, the connecting sections are in T-shaped straight strip shapes, and the connecting pieces are installed and connected between every two adjacent connecting sections;
the installation is located the first girder steel of the regional main girder steel both sides of tip with during the girder steel of second time, will be located the first girder steel of the regional main girder steel both sides of tip with the tip erection joint of the girder steel of second time is in corresponding on the connecting piece.
The construction method of the multidirectional multi-curvature large-span curved reticulated shell system is further improved in that the provided connecting piece is in an inverted conical shape and is provided with a curved annular surface, and the end part of the connecting section is provided with a connecting end matched with the annular surface;
when the connecting section and the connecting piece are connected in an installing mode, the connecting end is connected to the corresponding annular surface in an installing mode.
The construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is further improved in that a transverse plate and a vertical plate are provided when the connecting section is assembled, a clamping groove which is matched with the ring surface and is arc-shaped is formed at the end part of the transverse plate, and the end surface of the vertical plate is inclined;
when the connecting section and the connecting piece are installed and connected, the end parts of the transverse plates are fixed on the annular surface through the clamping groove clamping sleeves, and the end surfaces of the vertical plates are fixedly connected with the corresponding annular surface.
The construction method of the multi-direction multi-curvature large-span curved reticulated shell system according to the present invention is further improved in that, when the first steel beam is assembled, a first curved plate having a curved shape and a second curved plate having a curved shape are provided, the first curved plate is horizontally disposed, and the second curved plate is vertically connected to the bottom surface of the first curved plate.
The construction method of the multidirectional multi-curvature large-span curved reticulated shell system is further improved in that the end part of the first curved plate on the first steel beam connected with the connecting piece is provided with an arc-shaped groove corresponding to the ring surface, the end part of the second curved plate on the first steel beam connected with the connecting piece is provided with an inclined mounting surface matched with the ring surface corresponding to the ring surface,
when the first steel beam and the connecting piece are installed and connected, the end part of the first curved plate is fixed on the corresponding ring surface through the groove clamping sleeve, and the installation surface is fixedly connected with the corresponding ring surface.
The construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is further improved in that wing plates and web plates are provided when main steel beams positioned in the middle area are assembled, the wing plates are transversely arranged, and the web plates are vertically connected to the bottom surfaces of the wing plates;
the end part of the first curved plate on the first steel beam in the middle area corresponds to the wing plate to form a first inclined plane matched with the wing plate, the end part of the second curved plate on the first steel beam in the middle area corresponds to the wing plate to form a protruding part partially protruding out of the first curved plate, and the end face of the protruding part is inclined;
when the first steel beam and the main steel beam located in the middle area are installed and connected, the first inclined plane is flush with the wing plate fixedly connected, the top surface of the protruding portion is fixedly connected with the bottom surface of the wing plate, and the end face of the protruding portion is fixedly connected with the corresponding web.
Drawings
FIG. 1 is a flow chart of the construction method of the multi-direction multi-curvature large-span curved surface reticulated shell system of the invention.
Fig. 2 is a schematic structural diagram of the multidirectional multi-curvature large-span curved surface reticulated shell system of the present invention.
Fig. 3 is a schematic structural view of a grid structure and a square frame in the construction method of the multidirectional multi-curvature large-span curved surface latticed shell system.
Fig. 4 is a schematic structural view illustrating connection of the main steel beam positioned at the end region with the first steel beam and the second steel beam positioned at both sides thereof in the construction method of the multi-directional multi-curvature large-span curved surface latticed shell system of the present invention.
Fig. 5 is a front view of a first steel beam connected to a connecting member in the construction method of the multi-directional multi-curvature large-span curved surface reticulated shell system according to the present invention.
Description of the symbols: the steel beam structure comprises a square frame body 10, a first rod piece 11, a second rod piece 12, a main steel beam 21 located in an end area, a connecting section 211, a transverse plate 2111, a vertical plate 2112, a connecting piece 212, a main steel beam 22 located in a middle area, a first secondary steel beam 31 connected with the connecting piece, a first secondary steel beam 32 located in the middle area, a first curved plate 33, a second curved plate 34, a mounting surface 341, a protruding portion 342, a second secondary steel beam 40, a first arc plate 41 and a second arc plate 42.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. 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 invention provides a construction method of a multidirectional multi-curvature large-span curved surface latticed shell system.
The construction method of the multi-directional multi-curvature large-span curved reticulated shell system of the invention is explained below with reference to the accompanying drawings.
Referring to fig. 1, in this embodiment, a construction method of a multidirectional multi-curvature large-span curved reticulated shell system includes the following steps:
s101: establishing a three-dimensional model of the curved surface reticulated shell system according to a design drawing of the curved surface reticulated shell system, numbering each component of the curved surface reticulated shell system and acquiring a design position coordinate of each component;
s102: importing data of the three-dimensional model into a three-dimensional scanner and a total station;
s103: assembling each component of the curved surface latticed shell system according to the lofting position of the total station;
s104: in the assembling process, the three-dimensional scanner scans each assembled component in real time to obtain the installation position coordinates of each assembled component;
s105: judging whether the difference value between the installation position coordinate and the corresponding design position coordinate is larger than a preset deviation value or not;
s106: if so, judging that the installation position of the component is wrong;
s107: if not, the judgment result is that the installation position of the component is correct;
s108: and displaying the judgment result of each component, and detaching and remounting the component with the wrong mounting position.
In the construction method of the reticulated shell system in the embodiment, the total station performs lofting based on data of the three-dimensional model, realizes installation and positioning of each component, and after installation is completed, the total station determines whether the installation position of each component is correct or not through the three-dimensional scanner, and feeds back and adjusts information of the component with the installation error in time, so that the installation accuracy and the installation efficiency of the integral reticulated shell system are improved.
In a specific embodiment, after each scanning, the numbers corresponding to the scanned components are traversed, the information of the components with correct installation positions is deleted, and whether the installation positions of the rest components are correct or not is judged.
After scanning at every turn, will originally judge the correct component of mounted position and reject, only judge to the newly installed component that does not judge and the component that original mounted position misplaced at every turn promptly to reduce the work load of calculation and judgement greatly, improved judgement efficiency and speed, more energy-conserving and power saving, feedback judgement result that can be quick.
Furthermore, the three-dimensional model is utilized to carry out simulation pre-assembly on each installation scheme, and the appropriate installation scheme is determined through comparison and analysis.
Furthermore, the installation scheme comprises the installation sequence, the installation mode and the stress analysis of each component.
Preferably, tekla/revit software is used to create a three-dimensional model and perform simulation analysis.
Referring to fig. 2 and 3, in a specific embodiment, when assembling the curved reticulated shell system, a first rod 11 and a second rod 12 are provided, the first rod 11 is arc-shaped, and the second rod 12 is installed and connected between corresponding ends of a pair of the first rods 11 to form an arc-shaped square frame 10;
providing a plurality of assembled main steel beams, wherein the main steel beams are in a T-shaped straight strip shape, and the main steel beams are arranged between the pair of first rod pieces 11 at intervals;
providing assembled first steel beams, wherein the first steel beams are in a T-shaped curved shape, and obliquely installing and connecting a plurality of first steel beams between two adjacent main steel beams to form an included angle between the two adjacent first steel beams;
providing assembled second steel beams 40, obliquely installing and connecting a plurality of second steel beams 40 between the second rod 12 and the main steel beams adjacent to the second rod 12 to form an included angle between every two adjacent second steel beams 40, and combining the plurality of main steel beams, the plurality of first steel beams and the plurality of second steel beams 40 to form a plurality of curved grid structures;
according to the design and modeling of the curved reticulated shell system, a plurality of square frame bodies 10 on the grid structure are spliced and connected to form the wavy multidirectional multi-curvature large-span curved reticulated shell system.
The latticed shell system adopts the T-shaped steel beams to replace traditional steel pipes and H-shaped steel, and construction cost can be greatly reduced because the manufacturing cost of the T-shaped steel beams is lower than that of the steel pipes and the H-shaped steel. The lines of the grid structure formed by the steel pipes and the H-shaped steel in the prior art are thick and heavy, and the T-shaped steel beams are adopted in the application, so that the lines of the grid structure are lighter and lighter, and the whole structure is lighter and more ingenious.
Referring to fig. 2 and 3, further, the square frame 10 is divided into end regions located at two ends of the square frame 10 and a middle region located between the two end regions, and at least one main steel beam is located in the end regions;
when the main steel beam 21 positioned in the end part area is assembled, a connecting piece 212 and an assembled connecting section 211 are provided, the connecting section 211 is in a T-shaped straight strip shape, and the connecting piece 212 is installed and connected between two adjacent connecting sections 211;
when the first and second steel beams 40 located at both sides of the main steel beam 21 of the end region are installed, the ends of the first and second steel beams 40 located at both sides of the main steel beam 21 of the end region are installed and connected to the corresponding connection members 212.
Through setting up connecting piece 212 with the area of contact who increases between main girder steel and first girder steel, main girder steel and second girder steel 40 to strengthen the joint strength between main girder steel and first girder steel, main girder steel and second girder steel 40.
Referring to fig. 3 and 4, further, the second steel beam 40 has a one-way curved shape. The number of the main steel beams in the end area is more than or equal to 2, at least one row of first steel beams are also positioned in the end area, and the first steel beams positioned in the end area are also in a unidirectional curved shape. A unidirectional curve, i.e. having only one direction of curvature, resembles an arch.
Referring to fig. 3 and 4, further, the first steel sub-beam 32 located at the middle region has a bi-directional or multi-directional curved shape. The bidirectional or multidirectional curve has two or more bending directions, and the curve changes in radian and angle in three directions in an XYZ-axis three-dimensional space are similar to waves.
Preferably, the lattice structure is in the shape of an arch.
The rigidity of the unidirectional curved T-shaped steel beam is greater than that of the bidirectional or multidirectional curved T-shaped steel beam. Each square frame 10 is divided into an end area located at two ends and a middle area located in the middle, the middle area is designed to be matched with the curved shape of the reticulated shell system better by adopting the multidirectional curved T-shaped steel beam, the arched upper portion bears a small load, the stability of the stress performance of the whole structure can be effectively guaranteed by adopting the bidirectional or multidirectional curved T-shaped steel beam, the rigidity and the stress performance of two ends of the grid structure are enhanced by adopting the unidirectional curved T-shaped steel beam in the end area, and the load transmitted by the T-shaped steel beam located in the middle area is effectively borne.
Meanwhile, as the bidirectional or multidirectional curved T-shaped steel beams are bent in two or more directions, the bending degree of the bidirectional or multidirectional curved T-shaped steel beams is larger, the unidirectional curved T-shaped steel beams are more easily butted with the side parts of the main beams in a flush manner, and the bending direction of the unidirectional curved T-shaped steel beams is single, when the unidirectional curved T-shaped steel beams are butted on the main steel beams, the end parts of the unidirectional curved T-shaped steel beams can not be ensured to be smoothly butted with the main steel beams in an even manner, and the risk of dislocation is easy to occur.
Because the main steel beam 22 positioned in the middle area is not provided with the connecting piece 212, and only the main steel beam 21 positioned in the end area is provided with the connecting piece 212, the construction cost is saved. The number of rows of unidirectional curved T-shaped steel beams can be designed according to the stress performance of the whole grid structure, and if the number of the main steel beams in one end region is 1, the number of the unidirectional curved T-shaped steel beams in the end region is 1; if the number of the main steel beams in one end part area is 2, the number of the unidirectional curved T-shaped steel beams in the end part area is 2, and by analogy, the more the number of the rows of the unidirectional curved T-shaped steel beams is, the stronger the overall rigidity and the stress performance are, but the more the number of the connecting pieces 212 is, the higher the construction cost is, and the reasonable arrangement and design can be carried out on the unidirectional curved T-shaped steel beams and the bidirectional or multidirectional curved T-shaped steel beams according to the actual construction requirements.
Referring to fig. 3 and 4, in a specific embodiment, a connecting member 212 is provided in an inverted conical shape and has a curved annular surface, and a connecting end matched with the annular surface is formed at the end of the connecting section 211;
when the connecting segments 211 and the connecting pieces 212 are installed, the connecting ends are installed and connected to the corresponding ring surfaces.
Referring to fig. 3 and 4, further, when the connecting section 211 is assembled, a horizontal plate 2111 and a vertical plate 2112 are provided, a slot adapted to the ring surface and in an arc shape is formed at an end of the horizontal plate 2111, and an end surface of the vertical plate 2112 is in an inclined shape;
when the connecting section 211 and the connecting piece 212 are installed, the end of the transverse plate 2111 is fixed on the ring surface through the clamping groove and the clamping sleeve, and the end surface of the vertical plate 2112 is fixedly connected with the corresponding ring surface.
The contact area between the connecting section 211 and the ring surface is increased through the clamping groove, and the connection strength between the connecting section 211 and the ring surface is enhanced.
Referring to fig. 3 and 4, in one embodiment, when the first steel girder is assembled, a first curved plate 33 having a curved shape and a second curved plate 33 having a curved shape are provided, the first curved plate 33 is horizontally disposed, and the second curved plate 33 is vertically coupled to the bottom surface of the first curved plate 33.
Referring to fig. 3 and 4, further, the first curved plate 33 of the first steel beam 31 connected to the connecting member 212 has an arc-shaped groove formed on an end thereof corresponding to the ring surface, the second curved plate 33 of the first steel beam 31 connected to the connecting member 212 has an inclined mounting surface 341 formed on an end thereof corresponding to the ring surface,
when the first steel beam and the connecting member 212 are installed and connected, the end of the first curved plate 33 is fixed to the corresponding ring surface through the groove ferrule, and the installation surface 341 is fixedly connected to the corresponding ring surface.
The contact area of the first curved plate 33 and the torus is increased by the groove, so that the connection strength of the first curved plate 33 and the torus is enhanced.
Referring to fig. 4 and 5, further, when the main steel beam 22 located in the middle region is assembled, a wing plate and a web plate are provided, the wing plate is transversely arranged, and the web plate is vertically connected to the bottom surface of the wing plate;
the end part of the first curved plate 33 on the first steel beam 32 in the middle area is formed with a first inclined plane matched with the wing plate corresponding to the wing plate, the end part of the second curved plate 33 on the first steel beam 32 in the middle area is formed with a protruding part 342 partially protruding out of the first curved plate 33 corresponding to the wing plate, and the end surface of the protruding part 342 is inclined;
when the first steel beam and the main steel beam 22 located in the middle area are connected in an installing mode, the first inclined plane is fixedly connected with the wing plates and is flush with the wing plates, the top surfaces of the protruding portions 342 are fixedly connected with the bottom surfaces of the wing plates, and the end surfaces of the protruding portions 342 are fixedly connected with the corresponding web plates.
Protruding portion 342 plays the reinforced (rfd) effect of bearing to the pterygoid lamina with pterygoid lamina fixed connection on the one hand, on the other hand and web fixed connection, has increased area of contact, has strengthened joint strength.
In one embodiment, a plurality of support columns are disposed on the construction surface at intervals corresponding to the design position of the square frame 10, and the square frame 10 is fixed on the plurality of support columns.
Preferably, the main steel beams are uniformly spaced along the length direction of the first rod 11.
Referring to fig. 4 and 5, in a specific embodiment, when the second steel beam 40 is spliced, a first arc plate 41 having an arc shape and a second arc plate 42 having an arc shape are provided, the first arc plate 41 is transversely disposed, and the second arc plate 42 is vertically connected to the bottom surface of the first arc plate 41;
the rod piece is I-shaped steel and comprises a pair of transverse parts arranged in parallel and a vertical part vertically connected between the pair of transverse parts;
one end of the first arc plate 41 is formed with a first butting face which is matched with the transverse part and is in an inclined shape, and the other end is formed with an arc-shaped concave face corresponding to the ring surface;
one end of the second arc plate 42 is formed with a second butt surface which is adapted to the vertical part and is inclined, the other end is formed with a third inclined surface which is inclined corresponding to the ring surface,
when the second secondary beam and the rod piece are installed and connected, the first butt joint surface is fixedly connected with the transverse portion in a flush mode, the concave surface is connected with the ring surface in a butt joint mode, the second butt joint surface is fixedly connected with the vertical plate, and the third inclined surface is connected with the ring surface in a butt joint mode.
The main steel beam, the first steel beam, the second steel beam 40, the connecting piece 212 and the square frame 10 are all connected by welding.
The workflow of the construction method of the multidirectional multi-curvature large-span curved surface latticed shell system is explained in a specific embodiment.
The T-shaped steel grid beam has the characteristic of multidirectional multi-curvature, and before the T-shaped steel grid beam is installed on a building entity, tekla/revit software is used for carrying out simulation pre-assembly and numbering treatment on a multidirectional multi-curvature arch latticed shell structure, and analyzing and simulating the installation sequence and the installation form of the large-span hub nodes and the multidirectional multi-curvature assembly effect of the T-shaped steel grid beam.
After the analysis and simulation are completed, before steel latticed shell structural members leave a factory in a segmented mode, hoisting and pre-assembling are carried out by using a gantry crane of a steel structure processing plant according to the serial numbers and the axis positions of all steel members in the deepened design model, and spot welding and fixing assembling are carried out one by one.
After the pre-assembly in a factory is completed, a FARO three-dimensional laser scanner is used for on-site scanning, three-dimensional coordinate data of the surface of an initial steel latticed shell structure are collected, space point location information is processed, a three-dimensional image model is established, the deviation is corrected by comparing the three-dimensional coordinate data with a deepened model for many times, and the deviation value is less than 5mm, so that the deviation correction can be completed and the deviation is sent to the site.
Hoisting the steel latticed shell member to the installation position of the building entity, strictly according to the installation sequence number, positioning and installing according to the datum point and the datum line by using a theodolite, and fixing by spot welding. And rechecking through a three-dimensional laser scanner, comparing, analyzing, checking and adjusting the result of the factory pre-assembled three-dimensional image model with the site assembled three-dimensional image model and the deepened model, and ensuring that the site construction quality reaches the standard.
In order to ensure safe construction, according to the overall size of a roof structure, a general sectional symmetrical assembling and welding installation scheme from the center to the periphery can be adopted, and the scheme is as follows:
1) Dividing the steel latticed shell roof into a middle area, side areas and side areas according to the distribution condition of the H-shaped steel main beam, wherein each area is symmetrically divided into a plurality of construction sections;
2) In the construction, the central region main structure net rack is assembled, welded and installed firstly, the side region is installed later, and the side region is installed finally.
3) From the center district to the side district, reach the limit district again, for main construction rhythm, drive a plurality of construction section, from the centre to symmetrical diffusion hoist and mount welding installation all around, guarantee the stability of room lid latticed shell structure system in the installation.
4) All steel members are numbered, and are installed on site according to the numbers, so that the accuracy of materials is guaranteed.
More, can divide the district piece into the piece according to the combination axis span of room lid latticed shell structure, the major-minor roof beam of every block is assembled after the welding installation in on-the-spot processing district, and integral hoisting is assembled to the solid structure and is carried out whole.
By adopting the technical scheme, the invention has the following beneficial effects:
the method comprises the steps of creating a three-dimensional model of the curved surface latticed shell system in advance, and obtaining the serial number and the design position coordinate of each component; the total station lofts according to the acquired data of the three-dimensional model, so that the lofting accuracy is improved, the positioning accuracy of the installation position is improved, and the installation position errors are reduced. The connecting piece is used for realizing smooth, bending-free and staggered butt joint of the joints of the T-shaped steel beams, ensuring that the connecting ends are not warped, ensuring that each T-shaped steel grid beam spanning the middle part of the arched latticed shell is naturally and smoothly connected, and ensuring the overall safety and stability of the latticed shell system.
It should be noted that the structures, the proportions, the sizes, and the like shown in the drawings attached to the present specification are only used for matching the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention has no technical essence, and any modifications of the structures, changes of the proportion relation, or adjustments of the sizes, can still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Claims (10)
1. A construction method of a multidirectional multi-curvature large-span curved surface reticulated shell system is characterized by comprising the following steps:
establishing a three-dimensional model of the curved surface reticulated shell system according to a design drawing of the curved surface reticulated shell system, numbering each component of the curved surface reticulated shell system and acquiring a design position coordinate of each component;
importing the data of the three-dimensional model into a three-dimensional scanner and a total station;
assembling each component of the curved surface latticed shell system according to the lofting position of the total station;
in the assembling process, the three-dimensional scanner scans each assembled component in real time to obtain the mounting position coordinate of each assembled component, and judges whether the difference value between the mounting position coordinate and the corresponding design position coordinate is greater than a preset deviation value, if so, the judgment result is that the mounting position of the component is wrong, and if not, the judgment result is that the mounting position of the component is correct;
and displaying the judgment result of each component, and removing and reinstalling the component with the wrong installation position.
2. The construction method of the multidirectional multi-curvature large-span curved reticulated shell system according to claim 1, wherein after each scanning, numbers corresponding to the scanned components are traversed, information of the components with correct installation positions is deleted, and whether the installation positions of the rest components are processed are correct or not is judged.
3. The construction method of the multidirectional multi-curvature large-span curved reticulated shell system of claim 1, wherein the three-dimensional model is used for performing simulated pre-assembly on each installation scheme, and the comparison analysis is performed to determine a proper installation scheme.
4. The construction method of the multidirectional multi-curvature large-span curved reticulated shell system of claim 1, wherein when assembling the curved reticulated shell system, a first rod piece and a second rod piece are provided, the first rod piece is arc-shaped, and the second rod piece is installed and connected between corresponding ends of a pair of the first rod pieces to form an arc-shaped square frame;
providing a plurality of assembled main steel beams, wherein the main steel beams are in a T-shaped straight strip shape, and the main steel beams are arranged between the pair of first rod pieces at intervals;
providing assembled first steel beams, wherein the first steel beams are in a T-shaped curved shape, and a plurality of first steel beams are obliquely installed and connected between two adjacent main steel beams, so that an included angle is formed between the two adjacent first steel beams;
providing assembled secondary steel beams, obliquely installing and connecting a plurality of secondary steel beams between the second rod and a main steel beam adjacent to the second rod to form an included angle between every two adjacent secondary steel beams, and combining the plurality of main steel beams, the plurality of first secondary steel beams and the plurality of second secondary steel beams to form a plurality of curved grid structures;
and splicing and connecting a plurality of square frame bodies on the grid structure according to the design and modeling of the curved reticulated shell system to form the wavy multidirectional multi-curvature large-span curved reticulated shell system.
5. The method of constructing a multidirectional multi-curvature large-span curved reticulated shell system of claim 4, wherein the square frame is divided into end regions at both ends of the square frame and a middle region between the two end regions, at least one of the main steel beams being located in the end regions;
when the main steel beams positioned in the end part areas are assembled, connecting pieces and assembled connecting sections are provided, the connecting sections are in T-shaped straight strip shapes, and the connecting pieces are installed and connected between every two adjacent connecting sections;
the installation is located the first girder steel of tip region's main girder steel both sides with during the second girder steel, will be located the first girder steel of tip region's main girder steel both sides with the tip erection joint of second girder steel is in corresponding on the connecting piece.
6. The construction method of the multidirectional multi-curvature large-span curved reticulated shell system according to claim 5, wherein the provided connecting piece is in an inverted conical shape and has a curved annular surface, and the end of the connecting section is provided with a connecting end matched with the annular surface;
when the connecting sections and the connecting pieces are installed and connected, the connecting ends are installed and connected to the corresponding annular surfaces.
7. The construction method of the multidirectional multi-curvature large-span curved reticulated shell system of claim 6, wherein when the connecting sections are assembled, a transverse plate and a vertical plate are provided, a clamping groove which is matched with the annular surface and is arc-shaped is formed at the end part of the transverse plate, and the end surface of the vertical plate is inclined;
when the connecting section and the connecting piece are installed and connected, the end parts of the transverse plates are fixed on the annular surface through the clamping groove clamping sleeves, and the end surfaces of the vertical plates are fixedly connected with the corresponding annular surface.
8. The method of constructing a multi-directional multi-curvature large-span curved reticulated shell system of claim 6, wherein during the assembly of the first steel beams, a first curved plate having a curved shape and a second curved plate having a curved shape are provided, the first curved plate is horizontally disposed, and the second curved plate is vertically connected to a bottom surface of the first curved plate.
9. The construction method of the multi-directional multi-curvature large-span curved reticulated shell system of claim 8, wherein the end of the first curved plate on the first steel beam connected to the connecting member is formed with an arc-shaped groove corresponding to the ring surface, and the end of the second curved plate on the first steel beam connected to the connecting member is formed with an inclined mounting surface corresponding to the ring surface,
when the first steel beam and the connecting piece are installed and connected, the end part of the first curved plate is fixed on the corresponding ring surface through the groove clamping sleeve, and the installation surface is fixedly connected with the corresponding ring surface.
10. The construction method of the multidirectional multi-curvature large-span curved reticulated shell system of claim 8, wherein, when the main steel beams in the middle area are assembled, a wing plate and a web plate are provided, the wing plate is transversely arranged, and the web plate is vertically connected to the bottom surface of the wing plate;
the end part of the first curved plate on the first steel beam in the middle area is provided with a first inclined plane matched with the wing plate corresponding to the wing plate, the end part of the second curved plate on the first steel beam in the middle area is provided with a protruding part partially protruding out of the first curved plate corresponding to the wing plate, and the end surface of the protruding part is inclined;
when the first steel beam and the main steel beam located in the middle area are installed and connected, the first inclined plane is flush with the wing plate in fixed connection, the top surface of the protruding portion is fixedly connected with the bottom surface of the wing plate, and the end surface of the protruding portion is fixedly connected with the corresponding web.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116657809A (en) * | 2023-07-25 | 2023-08-29 | 北京城建集团有限责任公司 | Multi-curvature cross roof structure |
| CN117005634A (en) * | 2023-07-04 | 2023-11-07 | 中建一局集团装饰工程有限公司 | Large-span GRC outer wall decoration member splicing structure and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553729A (en) * | 1981-12-04 | 1985-11-19 | Symons Corporation | Multi-panelled concrete forming structure for forming flat curved walls |
| CN101413348A (en) * | 2008-11-28 | 2009-04-22 | 中冶京唐建设有限公司 | Steel structure three-dimensional scanning observe and control method |
| CN105569358A (en) * | 2015-12-15 | 2016-05-11 | 中国建筑第八工程局有限公司 | Construction method of special-shaped curved surface roof with large span and multiple curvatures |
| CN109235447A (en) * | 2018-10-11 | 2019-01-18 | 安徽省城建设计研究总院股份有限公司 | A kind of horizontal arch shell foundation pit support device |
| CN111794522A (en) * | 2020-06-15 | 2020-10-20 | 中建三局第三建设工程有限责任公司 | Construction method of large-span high-altitude steel structure |
| CN113360980A (en) * | 2021-06-04 | 2021-09-07 | 中国十七冶集团有限公司 | BIM technology-based deformed steel structure visualization construction method |
-
2022
- 2022-08-15 CN CN202210975528.5A patent/CN115262973A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4553729A (en) * | 1981-12-04 | 1985-11-19 | Symons Corporation | Multi-panelled concrete forming structure for forming flat curved walls |
| CN101413348A (en) * | 2008-11-28 | 2009-04-22 | 中冶京唐建设有限公司 | Steel structure three-dimensional scanning observe and control method |
| CN105569358A (en) * | 2015-12-15 | 2016-05-11 | 中国建筑第八工程局有限公司 | Construction method of special-shaped curved surface roof with large span and multiple curvatures |
| CN109235447A (en) * | 2018-10-11 | 2019-01-18 | 安徽省城建设计研究总院股份有限公司 | A kind of horizontal arch shell foundation pit support device |
| CN111794522A (en) * | 2020-06-15 | 2020-10-20 | 中建三局第三建设工程有限责任公司 | Construction method of large-span high-altitude steel structure |
| CN113360980A (en) * | 2021-06-04 | 2021-09-07 | 中国十七冶集团有限公司 | BIM technology-based deformed steel structure visualization construction method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117005634A (en) * | 2023-07-04 | 2023-11-07 | 中建一局集团装饰工程有限公司 | Large-span GRC outer wall decoration member splicing structure and construction method thereof |
| CN117005634B (en) * | 2023-07-04 | 2023-12-29 | 中建一局集团装饰工程有限公司 | Large-span GRC outer wall decoration member splicing structure and construction method thereof |
| CN116657809A (en) * | 2023-07-25 | 2023-08-29 | 北京城建集团有限责任公司 | Multi-curvature cross roof structure |
| CN116657809B (en) * | 2023-07-25 | 2023-11-28 | 北京城建集团有限责任公司 | Multi-curvature cross roof structure |
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Application publication date: 20221101 |