Method for simplifying a clothoid segment in a movable formwork system

Abstract

The patent relates to a method for simplifying easement curve segments in movable formwork system construction software, and is applied to the field of monorail transportation. The patent aims to provide a method for simplifying easement curve segments in movable formwork system construction software, simplify the formwork linear structure of the easement curve segment of the track beam, replace the special easement curve segment with a standard easement curve segment, solve the 'radius change effect' of the easement curve segment, realize the diversity of the easement curve segment style with the least number of standard segments, improve the service life of the movable formwork system under the premise of ensuring the smoothness of the line, reduce the time cost and economic cost of design and construction, and meanwhile, enhance the feasibility of emergency repair and replacement of the track beam in an emergency.

Description

Technical Field

[0001] This patent relates to a method for simplifying transition curve segments in software for movable template systems, applicable to the field of monorail transportation. Background Technology

[0002] Monorail transit systems are considered to be a type of urban rail transit with great development potential due to their low space occupancy, strong climbing ability, and flexible line layout. Currently, more than 20 cities in China plan to introduce monorail transit.

[0003] Track beams, turnouts, and bogies are the three key technologies of monorail transit, with track beam fabrication and alignment control being the core of these key technologies. The template for monorail track beams needs to be determined based on the track beam alignment, which in turn depends on the alignment of the designed route. The designed route alignment includes straight lines, circular curves, transition curves, and combinations thereof. Due to differences in span, transition curve length, superelevation, and curve radius, the dimensions of each section of the transition curve track beam segment vary. Therefore, each track beam template requires a specific design, which on the one hand significantly reduces design and construction efficiency and increases production costs, limiting the widespread application of monorail transit both domestically and internationally; on the other hand, according to accident statistics, curved track beams are often more susceptible to damage and destruction in emergency situations, and the aforementioned problems severely weaken the feasibility of emergency repair and replacement of track beams in extreme weather, traffic accidents, and other emergencies.

[0004] To address the aforementioned issues, the inventors, based on practical experience and theoretical research, proposed a simplified template linear structure for the transition curve section of the track beam. This structure replaces special transition curve sections with standard ones, resolving the "variable radius effect" of the transition curve section and achieving the goal of standardization and economy by using the fewest standard sections to address the diversity of transition curve section styles. Summary of the Invention

[0005] The technical problem this patent aims to solve is to provide a method for simplifying transition curve segments in the construction software of movable formwork systems. This method simplifies the linear structure of the transition curve segment template for track beams, replaces special transition curve segments with standard ones, solves the "variable radius effect" of transition curve segments, and achieves the goal of solving the diversity of transition curve segment styles with the minimum number of standard segments. While ensuring the smoothness of the track, this method increases the service life of the movable formwork system, reduces the time and economic costs of design and construction, and enhances the feasibility of emergency repair and replacement of track beams in emergency situations.

[0006] The technical solution adopted by this patent to solve its technical problem is: a method for simplifying transition curve segments in the construction software of a movable template system. The method is characterized by dividing the transition curve segment into seven standardized transition curve standard segments of different specifications according to the curve radius range, and combining and splicing each transition curve segment from one or more standardized transition curve standard segments. The simplification method includes the following steps:

[0007] Step 1: Read the parameter information of the transition curve segment and determine the starting coordinate position P of the transition curve segment. Q The coordinates of the endpoint P of the transition curve segment Z The starting curve radius R of the transition curve segment Q The radius R of the final curve segment of the transition curve. Z And the type parameter of the transition curve;

[0008] Step 2: Divide the transition curve segment into n segments according to the radius applicable range of the standard transition curve segment, denoted as S1, S2, ..., Sn;

[0009] Step 3: Starting from the coordinates P of the starting point Q Along the path of the transition curve, sequentially find the deviation values ​​between the transition curve segments and S1, S2, ..., Sn, and denote them as △f1, △f2, ..., △f n ;

[0010] Step 4: Determine the deviation accuracy Δ of the track beam formwork according to the requirements of the monorail transit industry standard, and sequentially adjust f1, Δf2, ..., Δf n Compare with the deviation accuracy △, if △f i If all values ​​are less than or equal to the deviation accuracy Δ, then the set division method meets the accuracy requirements; if Δf i If the deviation accuracy Δ is greater than the required accuracy, then stop this round of calculation and start the optimization division again from step 2 until all standard division segments meet the accuracy requirements, where i = 1, 2, ..., n.

[0011] Furthermore, the applicable radius of each standardized transition curve standard segment is determined according to the following table:

[0012]

[0013] Furthermore, the applicable range of the standard segment radius of the transition curve refers to the applicable radius range in the second row of the table. This range includes the previous value but does not include the subsequent value.

[0014] Furthermore, the range of the partitioning parameter n is 1-10.

[0015] Furthermore, when the transition curve is located on a straight line + transition curve + circular curve route, the standard segment type of the first transition curve segment divided from the straight line segment to the transition curve should be selected as the BZ7 standard template.

[0016] Compared with existing technologies, the advantages of this invention are: replacing special transition curve segments with standard transition curve segments simplifies the template alignment structure of the track beam transition curve segment, solves the "variable radius effect" of transition curve segments, and achieves the solution of diverse transition curve segment styles with a minimum number of standard segments. While ensuring track smoothness, it effectively increases the service life of the movable template system, reduces design and construction time and economic costs, and enhances the feasibility of emergency repair and replacement of track beams in emergency situations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the principle of the simplification method for transition curve segments.

[0018] In the diagram: P Q To ease the starting coordinates of the curve segment, P Z Here are the coordinates of the endpoint of the transition curve segment, S1-Sn are the standard segment numbers of the transition curve, and △f1-△fn are the deviation values ​​between the standard segment and the transition curve segment. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention relates to a method for simplifying transition curve segments in movable template system construction software. The transition curve segments are divided into seven standardized transition curve standard segments of different specifications according to the curve radius range. Each transition curve segment is formed by combining and splicing one or more standardized transition curve standard segments.

[0021] The applicable radius of each standardized transition curve standard segment is determined according to the following table:

[0022]

[0023] The applicable radius range in the second row of the table includes the first value but excludes the second value.

[0024] The simplified method of this invention includes the following steps:

[0025] Step 1: Read the parameter information of the transition curve segment and determine the starting coordinate position P of the transition curve segment. QThe coordinates of the endpoint P of the transition curve segment Z The starting curve radius R of the transition curve segment Q The radius R of the final curve segment of the transition curve. Z And the type parameter of the transition curve.

[0026] Step 2: Divide the transition curve segment into n segments according to the radius applicable range of the standard transition curve segment, denoted as S1, S2, ..., Sn.

[0027] Step 3: Starting from the coordinates P of the starting point Q Along the path of the transition curve, sequentially find the deviation values ​​between the transition curve segments and S1, S2, ..., Sn, and denote them as △f1, △f2, ..., △f n .

[0028] Step 4: According to the monorail transit industry standard "Management Measures for Quality Acceptance and Evaluation of Chongqing Straddle-Type Monorail Transit PC Track Beam Erection Project", the deviation accuracy of the track beam formwork is required to be determined as Δ = 5mm. Then, sequentially adjust f1, Δf2, ..., Δf... n Compare with the deviation accuracy △, if △f i If all values ​​are less than or equal to the deviation accuracy Δ, then the set division method meets the accuracy requirements; if Δf i If the deviation accuracy Δ is greater than the required accuracy, then this round of calculation will stop, and the optimization and division will be restarted from step 2 until all standard division segments meet the accuracy requirements, where i = 1, 2, ..., n. The range of the division parameter n is 1-10.

[0029] When the transition curve is located on a straight line + transition curve + circular curve route, the standard segment type of the first transition curve segment divided from the straight line segment to the transition curve should be selected as the BZ7 standard template.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for simplifying transition curve segments in active template system construction software, characterized in that, The transition curve segment is divided into seven standardized transition curve segments of different specifications according to the curve radius range. Each transition curve segment is composed of one or more standardized transition curve segments. The simplification method includes the following steps: Step 1: Read the parameter information of the transition curve segment and determine the starting coordinate position P of the transition curve segment. Q The coordinates of the endpoint P of the transition curve segment Z The starting curve radius R of the transition curve segment Q The radius R of the final curve segment of the transition curve. Z And the type parameter of the transition curve; Step 2: Divide the transition curve segment into n segments according to the radius applicable range of the standard transition curve segment, denoted as S1, S2, ..., Sn; Step 3: Starting from the coordinates P of the starting point Q Find the deviation values ​​between the transition curve segments and S1, S2, ..., Sn sequentially along the transition curve path, and denote them as Δ. f 1, △ f 2, ..., △ f n ; Step 4: Determine the deviation accuracy △ of the track beam formwork according to the requirements of the monorail transit industry standard, and then sequentially... f 1, △ f 2, ..., △ f n Compare with the deviation accuracy △, if △ f i If all values ​​are less than or equal to the deviation accuracy Δ, then the set division method meets the accuracy requirements; if Δ f i If the deviation accuracy Δ is greater than the specified value, the current calculation round will stop, and the optimization and division will be restarted from step 2 until all standard division segments meet the accuracy requirements. i =1,2,...,n.

2. The method for simplifying transition curve segments in a dynamic template system construction software according to claim 1, characterized in that: The applicable radius of each standardized transition curve standard segment is determined according to the following table: 。 3. The method for simplifying transition curve segments in a moving template system construction software according to claim 2, characterized in that: The applicable range of the standard segment radius of the transition curve refers to the applicable radius range in the second row of the table. This range includes the first value but excludes the second value.

4. The method for simplifying transition curve segments in a moving template system construction software according to claim 1, characterized in that: The range of the partitioning parameter n is 1-10.

5. A method for simplifying transition curve segments in a moving template system construction software according to any one of claims 1-4, characterized in that: When the transition curve is located on a straight line + transition curve + circular curve route, the standard segment type of the first transition curve segment divided from the straight line segment to the transition curve should be selected as the BZ7 standard template.

Images