CN-121980742-A - Bridge formation linear smoothness judging method and system based on girder assembling process

CN121980742ACN 121980742 ACN121980742 ACN 121980742ACN-121980742-A

Abstract

The invention provides a bridge forming linear smoothness judging method and system based on a girder assembling process, and relates to the technical field of linear smoothness judgment. And if the actual elevation curve exceeds the preset threshold, determining the elevation curve of the first bridge section according to the design curve. And fitting the actual elevation curve with the elevation curve of the first bridge section by adopting a preset spline curve fitting method to generate an elevation curve of the second bridge section. And combining the elevation curves of the actual assembly section, the first bridge section and the second bridge section into a virtual bridge line shape, performing high-pass filtering on the line shape, extracting the maximum absolute amplitude of the irregularity, comparing the maximum absolute amplitude with a preset irregularity allowable limit value, and judging whether the smoothness of the assembly section meets the requirement. The method can effectively improve the smoothness judgment precision of the bridge formation line shape.

Inventors

WANG MING
LIU XUAN
ZHU FANG
LI XIAOZHEN
WANG PING
CHEN RONG
ZHANG JINGYUAN
CHENG YIFAN
HUANG WENTAI
HE HAONAN
WEN CHEN

Assignees

西南交通大学

Dates

Publication Date: 20260505
Application Date: 20251208

Claims (10)

1. A bridge forming linear smoothness judging method based on a main beam assembling process is characterized by comprising the following steps: Acquiring a design curve of a girder bridge forming target elevation, an elevation curve of an actual girder assembling section and the length of the girder assembling section to be judged; if the elevation curve of the actual girder assembling section is larger than a preset threshold value, determining the elevation curve of the first bridge section based on the design curve of the girder bridge forming target elevation; Fitting the elevation curve of the actual main girder assembly section with the preset elevation curve of the first bridge section based on a preset spline curve fitting method to obtain the elevation curve of the second bridge section; Combining the elevation curve of the actual girder assembly section, the elevation curve of the first bridge section and the elevation curve of the second bridge section to obtain a virtual bridge formation shape; Filtering the virtual bridge formation line shape based on preset high-pass filtering to obtain a maximum absolute amplitude of irregularity corresponding to the length of the main beam assembly section to be judged, and comparing and judging based on the maximum absolute amplitude of irregularity and a preset irregularity allowable limit value to obtain a judging result of whether the main beam assembly section to be judged meets the line shape smoothness.
2. The bridge formation smoothness judgment method according to claim 1, wherein fitting the elevation curve of the actual main beam assembly section and the elevation curve of the preset first bridge section based on a preset spline curve fitting method comprises: sequencing the elevation curve of the actual main girder assembly section and the elevation curve of the preset first bridge section according to the descending order of the abscissa, and obtaining sequenced data information; Calculating the slopes of two adjacent sections of each data point in the sorted data information to obtain the derivative of the spline curve; and constructing a spline function based on the ordered data information and the derivative of the spline curve, solving the spline coefficient of each section, substituting the spline coefficient of each section obtained by solving into a spline polynomial, and obtaining the fitted elevation curve.
3. The bridge formation smoothness judging method based on the main beam assembling process according to claim 1, comprising: the preset threshold value is the sum of the length of the main beam assembly section to be judged and the preset wavelength of the high-pass filtering.
4. The bridge formation smoothness determination method according to claim 3, comprising: The elevation curve of the second bridge section is an elevation curve of the bridge section between a first end point and a second end point, wherein the first end point is an end point of the bridge section with a preset threshold length, and the second end point is a bridge section end point of the sum of the preset threshold length and a preset wavelength of high-pass filtering.
5. The bridge formation smoothness determination method according to claim 4, comprising: the elevation curve of the first bridge section is an elevation curve of the bridge section between a second end point and a third end point, wherein the third end point is a bridge forming end point.
6. The utility model provides a system is judged to linear smoothness of bridge formation based on girder assembly process which characterized in that includes: the acquisition unit is used for acquiring a design curve of the girder bridge forming target elevation, an elevation curve of an actual girder assembling section and the length of the girder assembling section to be judged; the processing unit is used for determining the elevation curve of the first bridge section based on the design curve of the bridge forming target elevation of the main girder if the elevation curve of the actual main girder assembling section is larger than a preset threshold value; the fitting unit is used for fitting the elevation curve of the actual girder assembly section and the preset elevation curve of the first bridge section based on a preset spline curve fitting method to obtain the elevation curve of the second bridge section; The combination unit is used for combining the elevation curve of the actual main girder assembly section, the elevation curve of the first bridge section and the elevation curve of the second bridge section to obtain a virtual bridge formation shape; The judging unit is used for filtering the virtual bridge formation line shape based on preset high-pass filtering to obtain a maximum absolute amplitude of irregularity corresponding to the length of the main beam assembly section to be judged, and comparing and judging based on the maximum absolute amplitude of irregularity and a preset irregularity allowable limit value to obtain a judging result of whether the main beam assembly section to be judged meets the line shape smoothness.
7. The bridge formation smoothness determination system according to claim 6, wherein the fitting unit comprises: The first fitting subunit is used for sequencing the elevation curve of the actual main girder assembly section and the preset elevation curve of the first bridge section according to the descending order of the abscissa, so as to obtain sequenced data information; The second fitting subunit is used for calculating the slopes of two adjacent sections of each data point in the sorted data information to obtain the derivative of the spline curve; And the third fitting subunit is used for constructing a spline function based on the ordered data information and the derivative of the spline curve, solving the spline coefficient of each section, substituting the spline coefficient of each section obtained by solving into a spline polynomial, and obtaining the fitted elevation curve.
8. The bridge formation smoothness determination system according to claim 6, wherein the processing unit comprises: The first processing subunit is used for calculating the preset threshold value as the sum of the length of the main beam assembly section to be judged and the preset wavelength of the high-pass filtering.
9. The bridge formation smoothness determination system according to claim 8, wherein the processing unit further comprises: And the second processing subunit is used for determining that the elevation curve of the second bridge section is an elevation curve of the bridge section between a first end point and a second end point, wherein the first end point is an end point of the bridge section with a preset threshold length, and the second end point is an end point of the bridge section with the sum of the preset threshold length and the preset wavelength of the high-pass filtering.
10. The bridge formation smoothness determination system according to claim 9, wherein the processing unit further comprises: And the second processing subunit is used for determining the elevation curve of the first bridge section to be the elevation curve of the bridge section between a second end point and a third end point, wherein the third end point is the end point of bridge formation.

Description

Bridge formation linear smoothness judging method and system based on girder assembling process Technical Field The invention relates to the technical field of linear smoothness judgment, in particular to a bridge forming linear smoothness judgment method and system based on a main beam assembly process. Background In order to ensure that the bridge formation line shape of the large-span railway bridge meets the line shape smoothness requirement, the line shape control of the main girder assembly in the construction process is always a key problem. For the girder erection of a large-span suspension bridge or a cable-stayed bridge, a sectional construction mode is generally adopted, however, due to the influences of factors such as construction stage difference and construction precision, errors exist between an actual structure and a theoretical calculation model, so that the linear smoothness of the bridge is influenced, the smoothness of a track line serving as an auxiliary structure on the bridge depends on the line shape of the bridge, and the running safety and the comfort of a railway train highly dependent on track irregularity can be influenced, so that the construction line shape of the girder is controlled in the construction stage, the linear smoothness of the bridge is ensured to meet the specified requirement, and the situation is avoided. At present, a method for controlling the linear shape of a main beam in construction mainly focuses on controlling the stress state and deformation of a structure to be in a controllable range, and ensures that the bridge formation state approaches to a theoretical design value. However, the method mainly considers the linear deviation from the structural state, does not consider that the linear smoothness of the rail surface after bridge formation is influenced by the linear irregularity of the bridge, exceeds the condition of the adjustment capability of the ballasted track, and finally the driving safety and the comfort are influenced. Therefore, a method and a system for judging the smoothness of the bridge line shape based on the girder assembling process are needed. Disclosure of Invention The invention aims to provide a bridge forming linear smoothness judging method and system based on a girder assembling process, so as to solve the problems. In order to achieve the purpose, the technical scheme adopted by the invention is as follows: In a first aspect, the application provides a bridge formation linear smoothness judging method based on a main beam assembling process, which comprises the following steps: Acquiring a design curve of a girder bridge forming target elevation, an elevation curve of an actual girder assembling section and the length of the girder assembling section to be judged; if the elevation curve of the actual girder assembling section is larger than a preset threshold value, determining the elevation curve of the first bridge section based on the design curve of the girder bridge forming target elevation; Fitting the elevation curve of the actual main girder assembly section with the preset elevation curve of the first bridge section based on a preset spline curve fitting method to obtain the elevation curve of the second bridge section; Combining the elevation curve of the actual girder assembly section, the elevation curve of the first bridge section and the elevation curve of the second bridge section to obtain a virtual bridge formation shape; Filtering the virtual bridge formation line shape based on preset high-pass filtering to obtain a maximum absolute amplitude of irregularity corresponding to the length of the main beam assembly section to be judged, and comparing and judging based on the maximum absolute amplitude of irregularity and a preset irregularity allowable limit value to obtain a judging result of whether the main beam assembly section to be judged meets the line shape smoothness. In a second aspect, the present application further provides a bridge formation smoothness judging system based on a girder assembling process, including: the acquisition unit is used for acquiring a design curve of the girder bridge forming target elevation, an elevation curve of an actual girder assembling section and the length of the girder assembling section to be judged; the processing unit is used for determining the elevation curve of the first bridge section based on the design curve of the bridge forming target elevation of the main girder if the elevation curve of the actual main girder assembling section is larger than a preset threshold value; the fitting unit is used for fitting the elevation curve of the actual girder assembly section and the preset elevation curve of the first bridge section based on a preset spline curve fitting method to obtain the elevation curve of the second bridge section; The combination unit is used for combining the elevation curve of the actual main girder assembly section, the elevation curve