A method for positioning and assembling a prefabricated bridge structure

Abstract

The present invention discloses a method for accurately positioning and assembling a prefabricated structure for a municipal highway bridge, which includes the following processes: S101, selecting prefabricated beam varieties and layout principles based on span information on a span layout result of a bridge; S102, inputting all parameter information for controlling positioning and assembly in an interface; S103, forming a prefabricated beam assembly control line in three-dimensional space based on the input parameters; S104, forming a universal prefabricated beam structure for a first prefabricated beam; S105, structurally refining a template for the first prefabricated beam; S106, rapidly arranging prefabricated beams in batches based on the first beam and multi-span assembly control lines; S107, automatically forming wet joint filling between beam bodies; S108, automatically filling a paving entity from the top surface to the road surface based on the prefabricated beam and the top structural surface of the wet joint. The present invention can realize accurate assembly control of prefabricated beams under various input conditions, effectively improving design quality and efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated structure assembly, and in particular to a method for positioning and assembling a prefabricated bridge structure. Background Art

[0002] With the development of building industrialization, the construction method of prefabrication and assembly has received more and more attention, and the prefabricated beam / assembly construction technology of standard concrete beam bridges has gradually been formed. The prefabricated beam / assembly construction technology is to divide the bridge superstructure into several beam units along the span direction, prefabricate them in pieces at the prefabrication site, transport them to the bridge site in large pieces, and use special bridge-building equipment to put the prefabricated beams in place on the piers. The longitudinal joints between the prefabricated beams are connected by connecting steel bars and pouring concrete in situ to form an integral concrete main beam structure. However, multi-variety and multi-parameter prefabricated beams increase the complexity of the assembly of prefabricated bridge structures, and put higher requirements on the positioning design of prefabricated beams under multi-condition and high-precision assembly construction conditions. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for positioning and assembling a prefabricated bridge structure, which can realize precise assembly control of prefabricated beams under various input conditions and effectively improve design quality and efficiency.

[0004] In order to achieve the above-mentioned object, the present invention provides a method for positioning and assembling a prefabricated bridge structure, which is characterized by comprising:

[0005] Step S101: selecting precast beam types and layout principles based on span information on the bridge span layout results;

[0006] Step S102: input all parameter information for controlling positioning and assembly in the interface;

[0007] Step S103: forming a precast beam assembly control line in three-dimensional space according to the input parameters;

[0008] Step S104: Based on the assembly control line of a precast beam corresponding to the positioning line, arrange the end portion and the variable cross-section position sketch outline template to form one of the universal precast beam structures;

[0009] Step S105: Refine the structure of the first precast beam template, including the crossbeam, end plate, and anchoring surface;

[0010] Step S106: quickly arrange precast beams in batches based on the first beam and the multi-span assembly control line;

[0011] Step S107: After the prefabricated beam body step is completed, the on-site cast wet joint input edge between the beam bodies is automatically identified and the wet joint filling is automatically formed;

[0012] Step S108: Based on the prefabricated beam and the wet joint top structural surface, automatically fill the top surface to the pavement entity of the road surface.

[0013] 2. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein in step S101, the method further comprises:

[0014] Step S1011, select the starting and ending points of the bridge span, automatically identify the pile numbers, and automatically draw the span lines;

[0015] Step S1012: Select the type of prefabricated beam;

[0016] Step S1013: Select a layout principle.

[0017] 3. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein in step S102, the method further comprises:

[0018] Step S1021: input general control information;

[0019] Step S1022: inputting cross slope superelevation control information;

[0020] Step S1023: input construction parameters.

[0021] 4. The method for positioning and assembling a prefabricated bridge structure according to claim 1, characterized in that in step S103, it further includes: converting the prefabricated beam assembly control line into an assembly positioning line in three-dimensional space, projecting it onto a two-dimensional plane, and adding a "_SQ" suffix to distinguish the edge beam control line.

[0022] 5. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein in step S104, the method further comprises:

[0023] Step S1041: input the precast beam assembly control line, use the precast structure size as a parameter, and output the precast beam cross section;

[0024] Step S1042: The side beam control line in the assembly control line determines the overall assembly position;

[0025] Step S1043, locating the end section and the variable section arrangement position;

[0026] Step S1044: forming a first prefabricated beam structure based on the above parameters and input profile arrangement.

[0027] 6. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein in step 105, the method further comprises:

[0028] Step S1051: Arrange and generate end beams based on the first precast beam;

[0029] Step S1052: Arrange and generate end plugging plates based on the first precast beam;

[0030] Step S1053: Arrange and generate the end anchorage structure based on the first precast beam.

[0031] 7. A method for positioning and assembling a prefabricated bridge structure as described in claim 1, characterized in that in step S106, the three-dimensional edge of the bridge is automatically extended to the left and right side beams, and a topological extension calculation is performed on the left and right side beams based on the arrangement result of the first prefabricated beam to realize the automatic arrangement of the structural cantilever based on the structural edge.

[0032] 8. The method for positioning and assembling a prefabricated bridge structure according to claim 1, characterized by comprising: in step S107, automatically matching adjacent small box girders based on semantic features and automatically filling wet joints.

[0033] 9. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein in step S108, the top surface of the wet joint is determined using the following topological algorithm:

[0034] S1081. Wet joints are convex geometric entities and the minimum bounding box of the geometric entity is calculated;

[0035] S1082, calculating the minimum bounding box geometric center mathematical point;

[0036] S1083. Calculate the Z positive vector by using the geometric center mathematical point;

[0037] S1084. Extract all topological surfaces of the wet joint using a topological method and obtain normal vectors of the topological surfaces;

[0038] S1085. Obtain the faces with the smallest angle with the positive Z direction, calculate the projection points of the geometric center mathematical points on these faces, compare and obtain the object with the largest Z value, and determine the top face.

[0039] The present invention has the following beneficial effects and improvements:

[0040] The present invention provides a method for accurately positioning and assembling prefabricated structures for municipal highway bridges, comprising the following processes: S101, selecting prefabricated beam varieties and layout principles based on span information on the results of bridge span layout; S102, inputting all parameter information for controlling positioning and assembly in an interface; S103, forming prefabricated beam assembly control lines in three-dimensional space based on the input parameters; S104, forming a universal prefabricated beam structure for a first prefabricated beam; S105, structurally refining the template for the first prefabricated beam; S106, rapidly arranging prefabricated beams in batches based on the first beam and multi-span assembly control lines; S107, automatically forming wet joint filling between beam bodies; S108, automatically filling the paving entity from the top surface to the road surface based on the prefabricated beam and the top structural surface of the wet joint. The present invention can realize accurate assembly control of prefabricated beams under various input conditions, effectively improving design quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 The present invention is a flowchart of a method for positioning and assembling a prefabricated bridge structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0045] If similar descriptions of "first\second" appear in the application documents, the following explanation will be added. In the following description, the terms "first\second\third" are used to distinguish similar objects and do not represent a specific order of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0047] The following describes a performance evaluation method, system and storage device of a health management platform proposed according to an embodiment of the present invention with reference to the accompanying drawings. First, a positioning and assembly method of a prefabricated bridge structure proposed according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0048] Figure 1 This is a flow chart of a method for positioning and assembling a prefabricated bridge structure according to an embodiment of the present invention. Figure 1 As shown, a method for positioning and assembling a prefabricated bridge structure of the present invention comprises the following steps:

[0049] A method for positioning and assembling a prefabricated bridge structure, characterized by comprising:

[0050] Step S101: Select the type and layout principle of precast beams based on the span information of the bridge span layout results.

[0051] In this embodiment, step S101 further includes the following steps:

[0052] Step S1011: Select the bridge span layout, automatically identify the starting and ending pile numbers, and automatically draw the span lines.

[0053] Step S1012: Select the type of precast beam. The precast beam types include small box beams, T beams, and hollow slabs, and can be expanded according to needs.

[0054] Step S1013: Selecting a precast beam arrangement principle, including equal wet joint width or widened wet joint width.

[0055] Step S102: Input all parameter information for controlling positioning and assembly into the interface.

[0056] In this embodiment, step S102 further includes the following steps:

[0057] S1021. Input general control information, including the center distance of the edge beam, the total paving thickness, the end angle threshold, the beam length adjustment threshold, and the slab control number.

[0058] S1022. Input the cross slope superelevation control information, including the pavement thickness based on the starting and ending points, the left and right cross slopes, and the cross slope of the small box girder.

[0059] S1023. Input construction parameters, including the starting and ending structural joint dimensions, standard plate width, and side plate half-width.

[0060] S1024. Input the wet joint range and cantilever control range.

[0061] Step S103: forming a precast beam assembly control line in three-dimensional space according to the input parameters.

[0062] In this embodiment, the precast beam assembly control line forms a three-dimensional positioning line in the xyz Cartesian coordinate system, including the top structural center line and the left and right structural edge lines of each precast beam. The edge beams need to adapt to the structural edge lines introduced in step S102. In addition to forming a general straight line structure, a structural straight line edge line based on the offset of the top structural center line is formed, and a "_SQ" suffix is formed to adapt to the variable edge line. The xy plane simultaneously forms the projection of all spatial assembly control lines, which is convenient for users to check the plane layout dimensions.

[0063] Step S104: Based on the assembly control line of a precast beam corresponding to the positioning line, arrange the end and variable section position sketch outline template to form one of the universal precast beam structures.

[0064] In this embodiment, step S104 further includes the following steps:

[0065] S1041. Introduce the parameters including "top structure center line", "structure top left line" and "structure top right line". The parameters are the main dimensions of the precast structure, and output the precast beam section including "wet joint end face" and "structure top plane".

[0066] S1042. The same suffix object of "top structure center line_suffix", "structure top left line_suffix", and "structure top right line_suffix" in the assembly control line determines the overall assembly position.

[0067] S1043. Based on the "S" and "E" start and end point identifiers and section parameters, locate the end section and variable section layout position.

[0068] S1044. Based on the above input and outline layout, a first prefabricated beam structure is formed.

[0069] Step S105: The first precast beam template is refined in terms of crossbeam, end plate and anchoring surface structure.

[0070] In this embodiment, step S105 further includes the following steps:

[0071] Step S1051: Arrange and generate end beams based on the first precast beam.

[0072] Step S1052: If the precast beam includes an inner cavity, the end plugging plates are arranged and generated based on the first precast beam.

[0073] Step S1053: If the structure is a simply supported structure converted to a continuous structure, the end anchorage structure is arranged and generated based on the first precast beam.

[0074] Step S106: quickly arrange precast beams in batches based on the first beam and the multi-span assembly control lines.

[0075] In this embodiment, the left and right side beams in step S106 are automatically extended and arranged based on the three-dimensional edge of the bridge. When the left and right side beams are quickly arranged based on the design results of the first frame, topological extension calculations are performed based on the "structural edge", "wet joint end face" and "structural edge_SQ" on the corresponding side to realize automatic arrangement of the structural cantilever based on the structural edge.

[0076] Step S107: After the prefabricated beam body step is completed, the on-site cast wet joints between the beam bodies are automatically identified and the input edges are automatically formed into wet joint filling.

[0077] In this example, automatic filling of cast-in-place wet joints is achieved by outputting the "wet joint end face" of each precast beam and automatically matching adjacent small box beams based on their semantic features. The "wet joint end faces" on the outer sides of the left and right side beams are automatically excluded because they are referenced by the extended structural cantilever.

[0078] Step S108: Based on the prefabricated beam and the wet joint top structural surface, automatically fill the top surface to the pavement entity of the road surface.

[0079] In this example, the following topology algorithm is used for the top surface of the wet joint:

[0080] S1081. Calculate the minimum bounding box of the convex geometric entity for the wet joint; S1082. Calculate the mathematical point of the geometric center of the minimum bounding box.

[0081] S1083. Calculate the Z positive vector through the geometric center mathematical point; S1084. Extract all topological surfaces of the wet joint through a topological method and obtain the normal vector of the topological surface.

[0082] S1085. Obtain the faces with the smallest angle with the positive Z direction, calculate the projection points of the geometric center mathematical points on these faces, compare and obtain the object with the largest Z value, and determine the top face.

[0083] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and are not to be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for positioning and assembling a prefabricated bridge structure, characterized in that: include: Step S101: selecting the type and layout principle of precast beams based on the span information of the bridge span layout result; Step S102: input all parameter information for controlling positioning and assembly in the interface; Step S103: forming a precast beam assembly control line in three-dimensional space according to the input parameters; Step S104: Based on the assembly control line of a precast beam corresponding to the positioning line, arrange the end portion and the variable cross-section position sketch outline template to form one of the universal precast beam structures; Step S105: Refine the structure of the first precast beam template, including the crossbeam, end plate, and anchoring surface; Step S106: Rapidly arrange precast beams in batches based on the first beam and the multi-span assembly control lines, automatically extend the left and right side beams based on the three-dimensional edge of the bridge, and perform topological extension calculations on the left and right side beams based on the arrangement results of the first precast beam to achieve automatic arrangement of the structural cantilever based on the structural edge. Step S107: After the prefabricated beam body step is completed, the on-site cast wet joint input edge between the beam bodies is automatically identified and the wet joint filling is automatically formed; Step S108: Based on the prefabricated beam and the wet joint top structural surface, the top surface is automatically filled into the pavement entity of the road surface. The wet joint top surface adopts the following topological algorithm: S1081. Wet joints are convex geometric entities and the minimum bounding box of the geometric entity is calculated; S1082, calculating the minimum bounding box geometric center mathematical point; S1083. Calculate the Z positive vector by using the geometric center mathematical point; S1084. Extract all topological surfaces of the wet joint using a topological method and obtain normal vectors of the topological surfaces; S1085. Obtain the faces with the smallest angle with the positive Z direction, calculate the projection points of the geometric center mathematical points on these faces, compare and obtain the object with the largest Z value, and determine the top face.

2. A method for positioning and assembling a prefabricated bridge structure according to claim 1, characterized in that: In step S101, the following steps are also included: Step S1011, select the starting and ending points of the bridge span, automatically identify the pile numbers, and automatically draw the span lines; Step S1012: Select the type of prefabricated beam; Step S1013: Select a layout principle.

3. A method for positioning and assembling a prefabricated bridge structure according to claim 1, characterized in that: In step S102, the method further includes: Step S1021: input general control information; Step S1022: inputting cross slope superelevation control information; Step S1023: input construction parameters.

4. A method for positioning and assembling a prefabricated bridge structure according to claim 1, characterized in that: In step S103, the method further includes: converting the prefabricated beam assembly control line into an assembly positioning line in three-dimensional space, projecting it onto a two-dimensional plane, and adding a "_SQ" suffix to distinguish the edge beam control line.

5. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein: In step S104, the following steps are also included: Step S1041: input the precast beam assembly control line, use the precast structure size as a parameter, and output the precast beam cross section; Step S1042: The side beam control line in the assembly control line determines the overall assembly position; Step S1043, locating the end section and the variable section arrangement position; Step S1044: forming a first prefabricated beam structure based on the above parameters and input profile arrangement.

6. A method for positioning and assembling a prefabricated bridge structure according to claim 1, characterized in that: In step S105, the method further includes: Step S1051: Arrange and generate end beams based on the first precast beam; Step S1052: Arrange and generate end plugging plates based on the first precast beam; Step S1053: Arrange and generate the end anchorage structure based on the first precast beam.

7. The method for positioning and assembling a prefabricated bridge structure according to claim 1, wherein: include: In step S107, pairwise matching is automatically achieved based on the semantic features of adjacent small box girders, and wet joint filling is automatically achieved.

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