BIM (Building Information Modeling)-based efficient construction method for multi-layer grid structure

Abstract

The invention relates to the technical field of building construction, in particular to a BIM (Building Information Modeling)-based multi-layer grid structure efficient construction method, which comprises the following steps of: drawing a BIM model according to a structure drawing; the drawing method comprises the following steps: firstly, drawing the overall external contour of the grid structure, and drawing N volume surfaces in the external contour; segmenting on each volume measurement plane, the segmentation line being the position of the chord member, and the intersection point of the segmentation line being the position of the welding ball; welding balls, chord members and web members are placed; dividing the whole BIM model into a plurality of module BIM models in combination with the operation space; a material stacking space is planned, and materials are transported to the site in batches; assembling each net rack unit according to the module BI model, and hoisting the net rack units to a preset mounting position for welding and fixing; the problems that in grid structure construction, the number of rod pieces is large, the size and model are complex, the construction period is long, and the high-altitude welding quality is poor are solved; and the whole grid structure is constructed in units, so that the construction difficulty is reduced, and the construction quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and specifically relates to an efficient construction method for a multi-layer grid structure based on BIM. Background Art

[0002] A grid structure is a space structure formed by connecting multiple rods in a regular geometric pattern through nodes. Due to its high strength, good stability, strong seismic performance, and the ability to achieve large-span buildings, it is widely used in the construction of large public buildings with large space requirements such as stadiums, exhibition halls, and airport terminals.

[0003] The grid structure generally consists of chord members, web members, and welded balls spliced together. The chord members, web members, and welded balls are all prefabricated and produced in a standardized manner in the factory. During the construction of the grid structure, after the parts such as chord members, web members, and welded balls are transported to the site, they need to be assembled and welded on the site. There are problems such as a large number of parts, complex size models, and many connection nodes in the construction, so it is difficult to ensure the construction period. When the construction personnel are eager to catch up with the construction period, resulting in deviations in the position of the chord members or poor welding quality of the connection nodes, the construction quality of the structure cannot be guaranteed, affecting the safety of the structure in later use. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an efficient construction method for a multi-layer grid structure based on BIM that can reasonably arrange the construction sequence and achieve efficient construction.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] An efficient construction method for a multi-layer grid structure based on BIM, with a total of N layers of grids on the grid structure. The construction steps are as follows:

[0007] S1: Draw a BIM model according to the structural drawings. The following steps are used for drawing when drawing the BIM model;

[0008] S101: Draw the overall external contour of the grid structure according to the structural drawings, and draw N volume surfaces corresponding to the positions of the N layers of grids in the external contour;

[0009] S102: Divide each volume surface according to the grid structure of the chord members in the corresponding layer of the grid. The dividing lines are the positions of the chord members, and the intersection points of the dividing lines are the positions of the welded balls;

[0010] S103: Place welded balls, chord members, and web members at preset positions in each volume surface;

[0011] S2: After the overall BIM model of the grid structure is drawn, divide the overall BIM model of the grid structure into several BIM models of grid structure modules in combination with the working space of the site model;

[0012] S3: Plan the material stacking space in the operation space, and transport the module materials to the site in batches according to the material stacking space and the material stacking space requirements of each module.

[0013] S4: Weld and assemble each grid unit on the ground according to the corresponding BIM model of the grid structure module. Lift the grid unit to the preset installation position according to the overall BIM model of the grid structure, and weld and fix it to the main structure or the adjacent installed grid unit.

[0014] S5: Repeat steps S3 and S4 until the overall installation of the grid structure is completed.

[0015] Preferably, a further technical solution of the present invention is:

[0016] Preferably, it further includes step S0, constructing three families in BIM, namely chord members, web members, and welding balls. Correspondingly, in S103, draw welding balls at the intersection points of the dividing lines of each floor volume surface. In each adjacent two volume surfaces, each welding ball on the lower volume surface is connected to the four nearest welding balls on the upper volume surface through web members. On each floor volume surface, along the dividing line, every two adjacent welding balls are connected through chord members.

[0017] The present invention adopting the above technical solution, compared with the prior art, its prominent features are:

[0018] The present invention solves problems such as a large number of members, complicated size models, complicated connection nodes, long construction period, and poor high-altitude welding quality in the construction of grid structures; uses the BIM parametric family library to efficiently establish the BIM model of the grid structure, constructs the overall grid structure in units, reduces the construction difficulty of the grid structure, ensures the construction quality of the grid structure, and improves the safety during the construction process of the grid structure. Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the overall BIM model of the grid structure in the embodiment of the present invention;

[0020] Figure 2 is Figure 1 the enlarged structural schematic diagram at A in

[0021] Figure 3 is the side view structural schematic diagram of the overall BIM model of the grid structure in the embodiment of the present invention.

[0022] Description of the reference numerals: 1, welding ball; 2, chord member; 201, chord member in the upper volume surface; 202, chord member in the lower volume surface; 3, web member; 4, dividing surface. Detailed Embodiments

[0023] The present invention will be further described below in conjunction with specific embodiments. The purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0024] As Figures 1 to 3 shown, this embodiment provides an efficient construction method for a multi-layer grid structure based on BIM. There are N layers of grids on the grid structure. The construction steps are as follows:

[0025] S0: Construct three families in BIM, namely chord member 2, web member 3, and welded ball 1. Specifically, use the "Adaptive Metric Generic Model" in the "REVIT" software to create adaptive "web member 3" and "chord member 2", and parametric "welded ball 1", so as to realize that the angle between members can change with the change of the end point position of the members.

[0026] S1: Draw a BIM model according to the structural drawings. The following steps are adopted when drawing the BIM model.

[0027] S101: Draw the overall external contour of the grid structure according to the structural drawings, and draw N volume surfaces corresponding to the positions of the N layers of grids in the external contour; in this embodiment, taking a double-layer grid structure as an example, two volume surfaces are drawn in the external contour; of course, those skilled in the art are capable of constructing a three-layer grid structure according to this method.

[0028] S102: Divide each volume surface according to the grid structure of the chord member 2 in the corresponding layer of the grid. The dividing line is the position of the chord member 2, and the intersection point of the dividing line is the position of the welded ball 1. Specifically, in the "Surface Representation" tab, the intersection points of the dividing lines in the volume surface are represented in the form of nodes to realize the capture and binding of the endpoints of the chord member 2 and the web member 3.

[0029] S103: Place the welded ball 1, chord member 2, and web member 3 at preset positions in each volume surface; specifically, as Figure 1 、 Figure 2 , draw the welded ball 1 with the welded ball 1 family at the intersection points of the dividing lines of each layer of volume surface; in every two adjacent volume surfaces, each welded ball 1 on the lower volume surface is connected to the four nearest welded balls 1 on the upper volume surface through the web member 3; on each layer of volume surface, along the dividing line, every two adjacent welded balls 1 are connected through the chord member 2; the arrangement of the welded ball 1, the chord member 201 in the upper volume surface, and the chord member 202 in the lower volume surface is as Figure 2 、 3 shown.

[0030] S2: After the overall BIM model of the grid structure is drawn, realize the conversion from the drawing to three dimensions; divide the overall BIM model of the grid structure into several grid structure module BIM models in combination with the working space of the site model; as Figure 1Among them, two dividing surfaces 4 are provided, and the overall BIM model of the grid structure is divided into four BIM models of grid structure modules.

[0031] S3: Plan the material stacking space in the operation space. According to the material stacking space and the material stacking space requirements of each module, transport the module materials to the site in batches. This avoids the long-term occupation of the operation space by materials and realizes the effective utilization of the operation space.

[0032] S4: According to the corresponding BIM model of the grid structure module, weld and assemble each grid unit on the ground. Hoist the grid unit to the preset installation position according to the overall BIM model of the grid structure, and weld and fix it to the main structure or the adjacent installed grid unit.

[0033] S5: Repeat steps S3 and S4 until the overall installation of the grid structure is completed.

[0034] The present invention solves the problems in the construction of grid structures, such as a large number of members, various sizes and models, complex connection nodes, long construction period, and poor quality of high-altitude welding. It efficiently establishes a BIM model of the grid structure by using a BIM parametric family library, constructs the overall grid structure in units, reduces the construction difficulty of the grid structure, ensures the construction quality of the grid structure, and improves the safety during the construction of the grid structure. The present invention reasonably divides the spherical grid structure by using BIM technology, and the materials arrive in batches, improving the utilization efficiency of the site and reducing the cost of material transportation and hoisting. The present invention assembles and welds each grid unit on the ground. Compared with high-altitude welding, ground welding can provide a stable working environment, allowing workers to focus more on welding operations, which is beneficial to ensuring the welding quality and reducing accidental injuries caused by high-altitude operations. At the same time, multiple grid units can be welded synchronously on the ground, improving the construction efficiency.

[0035] The above are only the preferred embodiments of the present invention, and do not limit the scope of the rights of the present invention. Any equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of the rights of the present invention.

Claims

1. An efficient construction method for a multi-layer grid structure based on BIM, wherein a total of N layers of grids are arranged on the grid structure, characterized in that: The construction steps are as follows: S1: Draw the BIM model according to the structural drawings. The following steps are used to draw the BIM model; S101: Draw the outer contour of the entire grid structure according to the structural drawing, and draw N volume faces in the outer contour corresponding to the positions of the N layers of grids; S102: dividing the surface of each volume according to the grid structure of the chord in the grid of the corresponding layer, the dividing line is the position of the chord, and the intersection of the dividing lines is the position of the welding ball; S103: placing welding balls, chords, and webs at preset positions on each volume surface; S2: After the overall BIM model of the grid structure is drawn, the overall BIM model of the grid structure is divided into several grid structure module BIM models in combination with the working space of the site model; S3: Plan material stacking space in the work space, and transport module materials to the site in batches according to the material stacking space and the material stacking space requirements of each module; S4: According to the corresponding grid structure module BIM model, assemble each grid unit by welding on the ground, hoist the grid unit to the preset installation position according to the overall BIM model of the grid structure, and weld and fix it to the main structure or adjacent installed grid units; S5: Repeat steps S3 and S4 until the entire grid structure is installed.

2. According to the BIM-based efficient construction method for multi-layer grid structures according to claim 1, it is characterized by: The method further includes step S0, constructing three families in BIM, namely, a chord member, a web member, and a welded ball; In the corresponding S103, firstly, a welding ball is drawn at the intersection of each layer volume surface dividing line using a welding ball family; In every two adjacent volume surfaces, each welding ball on the lower volume surface is connected to the four most adjacent welding balls on the upper volume surface through the web bar; On each volume surface, along the dividing line, every two adjacent welded balls are connected by a chord.

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