Method and system for detecting and evaluating flood-fighting capacity of highway bridge

Abstract

The invention relates to the technical field of bridge engineering detection and evaluation, in particular to a highway bridge flood-fighting capacity detection and evaluation method and system. The method comprises the following steps: acquiring flood-fighting data of a highway bridge; determining a flood-fighting evaluation index according to the flood-fighting data; constructing a flood-fighting performance scoring model of the highway bridge; obtaining a flood-fighting performance score according to the flood-fighting performance scoring model; setting an evaluation interval of a bridge flood-fighting condition grade; comparing the flood-fighting performance score with the evaluation interval, and determining the grade of the flood-fighting condition of the highway bridge; and detecting and evaluating the flood-fighting capability of the highway bridge through the grade of the flood-fighting condition of the highway bridge. According to the method, by refining the detection evaluation indexes and adopting the analytic hierarchy process to establish the calculation model for evaluating the grade of the flood-fighting capacity of the highway bridge, man-made interference is effectively reduced, the evaluation accuracy is remarkably improved, powerful support is provided for bridge safety maintenance, and supplementation and perfection of current standard content are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering detection and evaluation, and in particular to a method and system for detecting and evaluating the flood resistance capacity of a highway bridge. Background Art

[0002] As a key node of highway traffic, the safety and stability of bridges are crucial to post-disaster rescue. In recent years, the problem of insufficient flood control capacity of bridges has become prominent, and water damage incidents have occurred frequently, resulting in huge economic losses. Given the key role of bridges in highway traffic and post-disaster rescue, reducing the occurrence of highway bridge disasters caused by floods has become an urgent issue to be solved.

[0003] At present, the current standards such as the "Highway Bridge and Culvert Maintenance Specifications" have stipulated the inspection and evaluation of bridge flood control capabilities, but the evaluation method is still at the qualitative stage and lacks systematic quantitative evaluation methods. This makes the evaluation results susceptible to human factors and difficult to accurately reflect the actual flood control status of the bridge. According to statistics, the number of bridges damaged by water and the economic losses have been on the rise in recent years, and the situation is grim.

[0004] The present invention aims to provide a more scientific, accurate and systematic method for testing and evaluating the flood resistance of bridges. By refining the testing and evaluation indicators and adopting the hierarchical analysis method to establish a calculation model for evaluating the flood resistance level of highway bridges, human interference can be effectively reduced, and the accuracy of the assessment can be significantly improved. This will provide strong support for the safe maintenance of bridges and supplement and improve the current standard content. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a method and system for detecting and evaluating the flood resistance capacity of a highway bridge.

[0006] In a first aspect, a method for detecting and evaluating the flood resistance capacity of a highway bridge provided by the present invention comprises the following steps: obtaining flood resistance data of the highway bridge; determining flood resistance evaluation indicators based on the flood resistance data; constructing a flood resistance performance scoring model for the highway bridge based on the flood resistance evaluation indicators; obtaining a flood resistance performance score based on the flood resistance performance scoring model; setting an evaluation interval for the flood resistance level of the bridge according to the flood resistance performance score; comparing the flood resistance performance score with the evaluation interval to determine the flood resistance level of the highway bridge; and realizing detection and evaluation of the flood resistance capacity of the highway bridge through the flood resistance level of the highway bridge. The present invention realizes accurate assessment of flood resistance capacity by comprehensively acquiring flood resistance data of highway bridges; innovatively constructs a flood resistance assessment index system including important flood resistance assessment indicators and general flood resistance assessment indicators by deeply analyzing flood resistance data, effectively avoiding the limitation of single indicator assessment and making the assessment result more comprehensive and accurate; realizes quantitative assessment of flood resistance capacity of highway bridges by constructing a flood resistance performance scoring model of highway bridges, making the assessment process more scientific and objective and effectively avoiding the interference of subjective judgment; through the flood resistance performance scoring model, comprehensively considers the performance of bridges in multiple key flood resistance indicators, so as to obtain the assessment result of flood resistance level of highway bridges, which not only reflects the current flood resistance capacity of bridges, but also provides clear direction and priority for subsequent maintenance and reinforcement; by dividing the flood resistance conditions of bridges into different levels, not only the bridge maintenance strategy is optimized, but also the maintenance efficiency is improved, which effectively reduces the threat of flood disasters to the safe and stable operation of highway transportation systems and provides a new solution for the detection and assessment of bridge flood resistance capacity.

[0007] Optionally, the flood control data of highway bridges includes: obtaining data on displacement, lateral connection, bearings, blocks and limit positions of the bridge superstructure; obtaining data on the actual water flow area and the highest water level under the bridge; obtaining data on the width of the river channel at the bridge site; obtaining data on the degree of offset of the bridge hole relative to the center line of the river; obtaining data on the condition of floating objects in the river section at the bridge site during flood season; obtaining data on the buried depth of deep foundations and shallow foundations; obtaining data on the erosion and spalling of the pier surface; obtaining data on the cone slope protection; and obtaining data on the regulating structure. The present invention comprehensively obtains data on the flood resistance of the bridge superstructure, deeply analyzes the stress state and deformation of the bridge under the action of flood, and provides key information for accurately evaluating the overall flood resistance of the bridge; by collecting data such as the water-passing section, the width of the river channel at the bridge site, and the offset of the bridge hole, the scouring and impact of the flood on the bridge are scientifically analyzed, providing data support for the formulation of effective flood prevention measures; by recording in detail the data on floating objects during the flood season, the foundation burial depth, pier erosion, cone slope protection and adjustment structures, the stability and durability of the bridge under extreme conditions are comprehensively evaluated, providing a scientific basis for the maintenance, reinforcement and upgrading of the bridge.

[0008] Optionally, determining flood control assessment indicators based on the flood control data includes: determining flood control conditions of bridge superstructures, water-passing sections, foundation burial depth, cone slope protection, river width at the bridge site, floating objects during flood season, pier erosion, bridge hole offset, and adjustment structure indicators based on the flood control data. The present invention innovatively determines flood control assessment indicators by carefully analyzing flood control data, which are directly related to the disaster resistance of bridges in floods, so that the assessment is more focused on key risk points, and the assessment efficiency and accuracy are improved.

[0009] Optionally, the flood resistance performance scoring model of highway bridges constructed based on the flood resistance assessment index includes: based on the flood resistance assessment index, according to the flood resistance assessment index classification table, determining the flood resistance assessment index type, the flood resistance assessment index type including important flood resistance assessment indicators and general flood resistance assessment indicators; based on the flood resistance assessment index type, constructing the flood resistance performance scoring model of highway bridges. The present invention achieves refined classification of indicators by distinguishing important flood resistance assessment indicators from general flood resistance assessment indicators, making the evaluation system more scientific and reasonable, and more accurately reflecting the performance of bridges in different flood resistance aspects; by constructing the flood resistance performance scoring model of highway bridges, the influence of various flood resistance assessment indicators on the flood resistance capacity of bridges is comprehensively considered, which not only improves the comprehensiveness and accuracy of the evaluation, but also creates conditions for quantitative comparison of the flood resistance capacity of bridges.

[0010] Optionally, the important flood resistance assessment indicators include the flood resistance status of the bridge superstructure, the water-passing section, the foundation burial depth and the cone slope protection indicators; the general flood resistance assessment indicators include the river channel width at the bridge site, floating objects during the flood season, pier erosion, bridge hole offset and adjustment structure indicators. The present invention directly links the flood resistance status of the bridge superstructure, the water-passing section, the foundation burial depth and the cone slope protection as important flood resistance assessment indicators to the core bearing and protection capabilities of the bridge in floods, so that the assessment focuses more on the safety of key structures and effectively improves the accuracy and pertinence of the assessment; by incorporating the river channel width at the bridge site, floating objects during the flood season, pier erosion, bridge hole offset and adjustment structures into the general flood resistance assessment indicators, the multi-dimensional impact of floods on bridges is fully considered, which not only enriches the assessment dimensions, but also enhances the comprehensiveness and practicality of the assessment results.

[0011] Optionally, the flood resistance performance scoring model satisfies the following expression: , in, represents the bridge flood resistance performance score, Indicates the maximum deduction score for important flood control assessment indicators. Represents the average value of deductions for general flood resistance assessment indicators. The present invention achieves accurate quantitative evaluation of bridge flood resistance capacity by constructing a flood resistance performance scoring model, making the evaluation process more transparent and objective, and effectively reducing the influence of human factors; by applying the scoring model, the evaluation results of bridge flood resistance capacity have higher comparability and practicality.

[0012] Optionally, the evaluation result of the flood resistance level of the highway bridge obtained by the flood resistance performance scoring model includes: obtaining the flood resistance performance score by the flood resistance performance scoring model; setting the evaluation interval of the bridge flood resistance level according to the flood resistance performance score; comparing the flood resistance performance score with the evaluation interval to determine the flood resistance level of the highway bridge. The present invention obtains the flood resistance performance score of the bridge through the flood resistance performance scoring model, realizes the specific quantification of the bridge's flood resistance capacity, and makes the evaluation result more intuitive and easy to understand; by innovatively setting the evaluation interval of the bridge's flood resistance level, it not only provides a scientific basis for the classification of the bridge's flood resistance capacity, but also makes the evaluation result more hierarchical and instructive; by comparing the flood resistance performance score with the evaluation interval, the flood resistance level of the highway bridge is accurately determined, which not only provides a clear direction for the flood resistance management of the bridge, but also provides an important reference for the upgrading and emergency response of the bridge, which is helpful to improve the safety and stability of the bridge under extreme weather conditions.

[0013] Optionally, the flood resistance performance score is compared with the assessment interval to determine the flood resistance level of the highway bridge, including: when the flood resistance performance score falls within the assessment interval (90, 100], the flood resistance level of the highway bridge is level one; when the flood resistance performance score falls within the assessment interval (70, 90], the flood resistance level of the highway bridge is level two; when the flood resistance performance score falls within the assessment interval (40, 70], the flood resistance level of the highway bridge is level three; when the flood resistance performance score falls within the assessment interval (0, 40], the flood resistance level of the highway bridge is level four. The present invention compares the flood resistance performance score with the set assessment interval to achieve an accurate division of the flood resistance level of the highway bridge, making the evaluation system more perfect and intuitively reflecting the status of the bridge at different flood resistance levels; by applying the grading method, not only the standardization and normalization of bridge flood resistance management is promoted, but also strong support is provided for bridge flood resistance research and technological innovation, which is helpful to promote the overall improvement of bridge flood resistance.

[0014] In a second aspect, the present invention provides a highway bridge flood resistance capacity detection and assessment system, comprising an input device, a processor, an output device and a memory, wherein the input device comprises a real-time monitoring module and a data collection module; the processor comprises a multi-factor model construction module, a data analysis module and a flood control quality assessment and feedback module; the output device comprises a prediction and judgment module and an abnormal situation warning module; the input device, the processor, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, the processor is configured to call the program instructions, and the system uses the highway bridge flood resistance capacity detection and assessment method. The present invention uses a real-time monitoring module and a data collection module to efficiently and accurately obtain various key data of bridges during floods, providing comprehensive and real-time data support for the evaluation of bridge flood resistance, and significantly improving the accuracy and timeliness of the evaluation; through a multi-factor model construction module, a variety of factors such as geology, meteorology, and bridge structure types are comprehensively considered to construct a flood resistance evaluation model that fits the actual situation; through a data analysis module, the relationship between data is deeply mined to provide a scientific basis for the flood control quality evaluation and feedback module, making the evaluation results more objective and comprehensive, and effectively guiding the flood resistance and reinforcement work of bridges; through a prediction and discrimination module and an abnormal situation warning module, warning signals are issued in a timely manner, and potential flood risks are identified and responded to at an early stage, effectively reducing the threat of floods to highway bridges, ensuring the stable operation of the transportation network, and improving the efficiency and safety of disaster response. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A flow chart of a method for detecting and evaluating the flood resistance capacity of a highway bridge according to an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a highway bridge flood resistance capacity detection and assessment system according to an embodiment of the present invention; Figure 3 This is an operation flow chart of the highway bridge flood resistance capacity detection and assessment system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that these specific details do not need to be adopted to implement the present invention. In other examples, in order to avoid confusing the present invention, known circuits, software or methods are not specifically described.

[0017] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or subcombination. In addition, it should be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale.

[0018] See also Figure 1 The embodiment of the present invention provides a method for detecting and evaluating the flood resistance capacity of a highway bridge, the method comprising the following steps: S1. Obtain flood resistance data for highway bridges.

[0019] Wherein S1 comprises the following steps: S11. Obtain data on the flood resistance of the bridge superstructure.

[0020] In one embodiment, the data of displacement, transverse connection, support, block and limit position of the bridge superstructure are obtained. Specifically, the following steps are included: S111. Obtain data on displacement of the bridge superstructure.

[0021] In this embodiment, the displacement sensors are installed at key positions of the bridge superstructure, including the top of the pier and the center of the bridge deck.

[0022] Furthermore, by reading the data from the sensors, the displacement data of the bridge superstructure is obtained.

[0023] S112. Obtain data on the lateral connections of the bridge superstructure.

[0024] In this embodiment, the vibration sensor is installed at the transverse connection part of the bridge, and the transverse connection part includes the cross beam and the cross diaphragm.

[0025] Furthermore, by reading the data from the vibration sensor, the lateral connection data of the bridge superstructure is obtained.

[0026] S113. Obtain data of bridge superstructure supports.

[0027] In this embodiment, the stress and strain sensors are installed at key positions of the support, including the bottom and side surfaces of the support.

[0028] Furthermore, by reading the data from the sensors, the data of the bridge superstructure supports are obtained.

[0029] S114. Obtain data of the bridge superstructure block.

[0030] In this embodiment, the appearance and state of the bridge block are directly observed to determine whether it is damaged or deformed.

[0031] S115. Obtain data on the limit positions of the bridge superstructure.

[0032] In this embodiment, the displacement sensor is installed at the key point of the bridge limit position, and the key point includes the two ends of the limiter.

[0033] Furthermore, by reading the data from the sensor, the displacement of the limit position is monitored in real time.

[0034] S12. Obtain data of the water-passing section.

[0035] In one embodiment, the data of the actual water flow area and the highest water level under the bridge are obtained. Specifically, the following steps are included: S121. Obtain data on the actual water flow area and the highest water level under the bridge.

[0036] In this embodiment, for bridges located in first-, second-, and third-level rivers, the riverbed section is measured with a tape measure to obtain the actual water-passing area under the bridge, and the following provisions shall be met: 1. It is advisable to select a typical section upstream and downstream of the bridge for measurement and take the average value.

[0037] 2. The location of the cross-section measuring points should be able to clearly reflect the riverbed cross-section. The interval should not be greater than 5m. If necessary, the measuring points should be increased and each measurement should be carried out at a fixed measuring point.

[0038] 3. The measuring points can be increased around bridge piers, foundations, wing walls, slope protection and cone slopes.

[0039] 4. It is advisable to draw a curve chart showing the relationship between water level and water-flowing cross-sectional area, and calculate the actual net water-flowing area based on the design water level value.

[0040] Furthermore, for bridges located in fourth- and fifth-level rivers, the highest water level line can be surveyed on site, and the current cross-section of the riverbed and the actual water-passing cross-sectional area can be roughly estimated by combining simple methods such as measuring the water depth with a plumb bob or a depth sounder.

[0041] S122. Obtain data on the highest water level under the bridge.

[0042] In this embodiment, the data of the highest water level under the bridge is obtained by observing the water level for a long period of time at a certain location in a river or lake. It should be noted that when investigating the highest water level on site, there are no less than 3 reliable flood mark points, and the maximum value is taken as the measured highest water level, and the flood occurrence time and rise and fall process are investigated on site.

[0043] S13. Obtain data on the width of the river at the bridge site.

[0044] In one embodiment, a tape measure is used to measure the width of the river channel at the bridge site.

[0045] Specifically, a representative river cross section was selected at the bridge site for measurement.

[0046] Further, a tape measure is used to measure the distance from one edge of the river channel to the other edge, and the data is recorded. In order to improve the measurement accuracy, measurements can be taken at multiple locations and the average value is taken as the final result.

[0047] It should be noted that the measurement of the river width at the bridge site should comply with the following regulations: 1. For bridges with a single span exceeding 150m or a total length exceeding 1000m, the cross-sectional width should be measured within 200m upstream and 1000m downstream of the river; for other bridges, the cross-sectional width of the river should be measured within 200m upstream and downstream of the river.

[0048] 2. When the bridge is located in the first, second or third level river channel, the number of measurement sections along the direction of water flow should not be less than 3, and typical sections should be selected.

[0049] 3. For bridges located in fourth or fifth level rivers, the width of the river can be measured at only one point near the bridge.

[0050] S14. Obtain bridge hole offset data.

[0051] In one embodiment, data on the degree of offset of the bridge opening relative to the river midline is obtained.

[0052] Specifically, for a straight river channel, the deepest point line, that is, the line connecting the deepest points in the river channel, usually coincides with or is very close to the mid-channel line. Therefore, the deepest point line is measured by the following steps: Select representative cross sections within a certain range upstream and downstream of the bridge for measurement; At each survey section, use a depth sounder, sonar or other underwater topographic survey equipment to measure the depth from the water surface to the river bottom; Connect the deepest points of each measuring section to form a deep line.

[0053] Furthermore, for non-straight rivers, such as curved, bifurcated or converging rivers, the deep channel line may not directly reflect the location of the middle channel line. In this case, the location of the middle channel line is determined by observing the maximum flow velocity point of a typical section upstream of the bridge during the flood season. The steps of this method are as follows: Select one or more representative cross sections within a certain distance upstream of the bridge for observation; Use a velocity meter, radar velocity gun or other velocity measuring equipment to measure the velocity at multiple points on the observation section; Analyze the measurement data and find the point with the largest flow velocity on each observation section; Connect the maximum flow velocity points of each observation section to form the location of the central line.

[0054] Furthermore, the position of the bridge hole is determined and its deviation from the center line is calculated.

[0055] S15. Obtain data on floating objects during the flood season.

[0056] In one embodiment, a field survey method is used to detect the status of floating objects in the river section at the bridge location during the flood season.

[0057] Specifically, data on the number, width, and water-blocking area of ​​floating objects were obtained.

[0058] S16. Obtain data on foundation burial depth.

[0059] In one embodiment, the appropriate burial depth of the shallow foundation is indirectly inferred by analyzing information such as soil layer distribution and groundwater level in the on-site geological survey report.

[0060] Furthermore, for deep foundations, more detailed geological surveys are required. Through drilling, sampling and other means, the bearing capacity and deformation characteristics of each soil layer can be analyzed based on the geological survey data.

[0061] Furthermore, according to the geological survey data, the bearing capacity and deformation characteristics of each soil layer are analyzed. Combined with the load requirements of the bridge, the burial depth and type of the deep foundation are determined.

[0062] Furthermore, the deep foundation is calculated by computer to obtain the buried depth of the deep foundation.

[0063] S17. Obtain data on pier erosion.

[0064] In one embodiment, the pier surface is surveyed using professional measuring tools to record the erosion and spalling of the pier surface, including key parameters such as the erosion area and depth. The professional measuring tools include but are not limited to a depth measuring rod and a thickness gauge.

[0065] Furthermore, high-definition cameras or video equipment are used to take photos and videos of the erosion parts of the piers, which clearly reflect the specific conditions and extent of erosion and spalling.

[0066] It should be noted that the erosion detection of water-related piers should comply with the following regulations: 1. When the number of bridge wading spans is less than 10, the erosion of the wading piers should be inspected one by one.

[0067] 2. When the number of wading spans of a bridge is ≥10, the number of typical piers to be sampled should not be less than 30% of the number of wading spans and should not be less than 10. When a bridge is located in a compound river channel at the boundary of a beach and a channel, the main river channel and beach piers should be covered.

[0068] S18. Obtain the data of the cone slope protection.

[0069] In one embodiment, the cone slope protection data is obtained by on-site investigation.

[0070] Specifically, observe the overall condition of the slope, record whether there are bulges, depressions, cracks, etc.; check the integrity of the paved surface, record the mortar shedding, damage to the masonry joints, etc.; assess the degree of damage to the slope angle, and record the shallow or deep pits formed by erosion.

[0071] Furthermore, a tape measure is used to measure the key dimensions of the cone slope protection; the height of the cone slope, the length of the major and minor axes of the bottom edge, the inclination angle of the slope, etc. are recorded; and detailed measurements are made on the damaged area, including the height of the bulge or depression, the length and width of the crack, the size and depth of the erosion pit, etc.

[0072] Furthermore, use a camera or video recording equipment to take photos and videos of the overall and local conditions of the cone slope protection; ensure that the photos and videos clearly reflect the actual conditions of the cone slope protection, including the damaged parts, degree of damage, etc.

[0073] Furthermore, the fill materials of the cone slope protection are sampled for laboratory testing; the physical properties such as fill type, density, strength, etc. of natural gravel, fly ash soil, cement stabilized soil, etc. are analyzed; and the impact of fill materials on the stability of the cone slope protection is evaluated.

[0074] Furthermore, the data obtained from on-site investigation, measurement, photography, video recording, and soil and material testing are collated.

[0075] S19. Obtain data for adjusting the structure.

[0076] In one embodiment, first, the state of the structure is inspected and regulated on site, and specific conditions such as local fractures, loose masonry, bulging, dents, or mortar falling off are recorded.

[0077] Furthermore, use measuring tools such as levels and total stations to measure the sinking and tilting of the structure and record the specific values.

[0078] Furthermore, check whether the slope shows signs of landslide and assess the geological stability around the structure.

[0079] Furthermore, check the design drawings to confirm whether the adjustment structures are set up as required and record the locations of missing or damaged structures.

[0080] Furthermore, for structures that have experienced foundation erosion, the degree and scope of the erosion shall be recorded in detail.

[0081] Furthermore, all data from on-site investigation, measurement, observation and recording are collated and summarized to form a complete data report on the adjusted structure.

[0082] S2. Determine flood control assessment indicators based on the flood control data.

[0083] Among them, S2 includes the following steps: S21. Determine the assessment scale of the flood resistance assessment index of the bridge superstructure based on the displacement, lateral connection, bearings, blocks and limit position data of the bridge superstructure.

[0084] In one embodiment, the evaluation scale of the bridge superstructure flood resistance condition assessment index is determined based on the bridge superstructure displacement, lateral connection, support, block and limit position data, combined with the bridge superstructure flood resistance condition index and graded assessment standard table described in Table 1.

[0085]

[0086] S22. Determine the evaluation scale of the water-passing section evaluation index based on the actual water-passing area and the highest water level data under the bridge.

[0087] In one embodiment, firstly, the water flow area assessment coefficient and the bridge site maximum water level coefficient are obtained according to the actual water flow area and the maximum water level data under the bridge. The water flow area assessment coefficient satisfies the following expression: , in, It represents the water flow area assessment coefficient. It represents the designed net water flow cross-sectional area. It represents the measured net water-passing cross-sectional area. The highest water level coefficient of the bridge site satisfies the following expression: , in, Indicates the highest water level coefficient at the bridge site, Indicates the highest water level the bridge has experienced since its completion. Indicates the highest water level for which the bridge is designed.

[0088] Furthermore, the assessment scale of the water-passing section assessment index is determined by combining the water-passing area index and the bridge site maximum water level classification assessment standard described in Table 2.

[0089]

[0090] It should be noted that when the assessment scales corresponding to the water-passing cross-sectional area and the highest water level at the bridge site are inconsistent, the scale corresponding to the water-passing cross-sectional area shall prevail.

[0091] S23. Determine the evaluation scale of the bridge site river channel width evaluation index based on the bridge site river channel width data.

[0092] In one embodiment, firstly, the bridge-site river channel width assessment coefficient is determined based on the bridge-site river channel width data. The bridge-site river channel width assessment coefficient satisfies the following expression: , in, It represents the evaluation coefficient of the river width at the bridge location. Indicates The original designed river width of each section; Indicates the measured bridge site The original designed river width of each section.

[0093] Furthermore, in combination with the bridge site river channel width index and the grading assessment standard described in Table 3, the assessment scale of the bridge site river channel width assessment index is determined.

[0094]

[0095] S24. Determine the evaluation scale of the bridge hole offset evaluation index based on the data of the degree of offset of the bridge hole relative to the river centerline.

[0096] In one embodiment, the bridge hole offset evaluation index evaluation scale is determined based on the data of the degree of offset of the bridge hole relative to the river centerline in combination with the bridge hole offset grading evaluation standard described in Table 4.

[0097]

[0098] S25. Determine the evaluation scale of the flood season floating object evaluation index based on the flood season floating object status data.

[0099] In one embodiment, the evaluation scale of the flood season floating object evaluation index is determined based on the flood season floating object status data in combination with the flood season floating object evaluation standard described in Table 5.

[0100]

[0101] S26. Determine the assessment scale of the foundation burial depth assessment index based on the total scour depth and protection status data.

[0102] In one embodiment, the buried depth of the deep foundation is first evaluated. The buried depth of the foundation should be determined based on the measured total scour depth, and the buried depth evaluation coefficient of a single deep foundation is calculated according to the following relationship: , in, Indicates the buried depth of a single deep foundation, Indicates the measured foundation burial depth. Indicates the original designed foundation burial depth.

[0103] Furthermore, in combination with the deep foundation burial depth index and grading assessment standard described in Table 6, the assessment scale of the foundation burial depth assessment index is determined.

[0104] Furthermore, in combination with the maximum allowable flow velocity of the commonly used shallow foundation protection types described in Table 7, the shallow foundation burial depth should be assessed. The main inspection should be on the technical condition of the protective paving and whether it can be washed away. The assessment scale of the single shallow foundation burial depth assessment index should be determined according to the provisions of Table 8.

[0105] It should be noted that the overall foundation depth assessment scale of the bridge should be the highest assessment scale of the individual foundation depths of all wading holes. When the burial depth of the non-rock riverbed pier and platform base does not meet the following requirements, the assessment scale of the overall foundation depth assessment index of the bridge should be directly assessed as "4".

[0106] 1. For large bridges with shallow foundations or caisson foundations, medium bridges and small bridges with unpaved riverbeds, the minimum base burial depth should be 1.5m plus 10% of the total scour depth.

[0107] 2. For extra-large bridges with shallow foundations or caisson foundations, the minimum base burial depth should be 2.0m plus 10% of the total scour depth.

[0108] 3. For pile foundation bridges, the minimum scour line should be higher than the design scour line.

[0109]

[0110] , ,

[0111] S27. Determine the pier erosion assessment scale based on the erosion data of the water-related piers.

[0112] In one embodiment, the erosion assessment scale of the pier and abutment is determined based on the erosion data of the water-related pier and abutment in combination with the grading and assessment standards for erosion detection of individual piers and abutments as described in Table 9.

[0113] It should be noted that the overall pier and abutment erosion assessment scale of the bridge should be the maximum scale of the erosion assessment of individual piers and abutments of all wading holes.

[0114]

[0115]

[0116] S28. Determine the assessment scale of the cone slope protection assessment index based on the slope protection form, fill type and drainage facility data of the cone slope protection.

[0117] In one embodiment, the assessment scale of the cone slope protection assessment index is determined based on the slope protection form, fill type and drainage facility data of the cone slope protection, combined with the cone slope protection detection and grading assessment standards described in Table 10.

[0118] S29. Determine the evaluation scale of the evaluation index of the adjustment structure based on the characteristic data of the adjustment structure.

[0119] In one embodiment, the assessment scale of the assessment index of the treatment structure is determined based on the characteristic data of the treatment structure and in combination with the single treatment structure detection and grading assessment standard described in Table 11.

[0120] S3. Based on the flood resistance assessment index, obtain the assessment result of the flood resistance level of the highway bridge.

[0121] Among them, S3 includes the following steps: S31. Based on the flood control assessment index, determine the flood control assessment index type according to the flood control assessment index classification table.

[0122] In one embodiment, based on the flood resistance assessment index, in combination with Table 12, the type of the flood resistance assessment index is determined, and the type is divided into important and general.

[0123]

[0124] S32. Based on the flood resistance assessment index type, a flood resistance performance scoring model for highway bridges is constructed.

[0125] In one embodiment, based on the flood resistance evaluation index type obtained in step S31, a flood resistance performance scoring model for highway bridges is constructed, and the flood resistance performance scoring model satisfies the following expression: , in, represents the bridge flood resistance performance score, It represents the maximum value of the deduction of important flood control assessment indicators, that is, the maximum value obtained after the deduction of important flood control assessment indicators is taken according to Table 13. It represents the average value of the deduction points for general flood prevention assessment indicators, that is, the arithmetic mean value calculated after the deduction points for each general flood prevention assessment indicator are taken according to Table 13.

[0126]

[0127] S33. Obtain the evaluation results of the flood resistance level of the highway bridge through the flood resistance performance scoring model.

[0128] In one embodiment, firstly, a flood resistance performance score is obtained through the flood resistance performance scoring model.

[0129] Furthermore, combined with Table 14, the evaluation results of the flood resistance level of highway bridges were obtained.

[0130]

[0131] S4. Through the evaluation results, the flood resistance capacity of highway bridges is tested and evaluated.

[0132] In a specific embodiment, a series of data on the flood resistance performance of highway bridges were obtained, and combined with Table 14, the following test and evaluation results were obtained: When the flood resistance performance score falls within the evaluation interval (90,100], the flood resistance level of the highway bridge is level one, that is, the flood resistance capacity is relatively strong; When the flood resistance performance score falls within the evaluation interval (70,90], the flood resistance level of the highway bridge is level 2, that is, the flood resistance capacity is medium; When the flood resistance performance score falls into the evaluation interval (40,70], the flood resistance level of the highway bridge is level three, that is, the flood resistance capacity is weak; When the flood resistance performance score falls into the evaluation interval (0,40], the flood resistance level of the highway bridge is level 4, which means that the flood resistance capacity is extremely poor.

[0133] Therefore, the method for detecting and evaluating the flood resistance capacity of highway bridges provided by the present invention realizes an accurate evaluation of the flood resistance capacity of highway bridges by comprehensively acquiring the flood resistance data of highway bridges; through in-depth analysis of flood resistance data, an innovative flood resistance assessment index system including important flood resistance assessment indicators and general flood resistance assessment indicators is constructed, which effectively avoids the limitations of single indicator evaluation and makes the evaluation results more comprehensive and accurate; by dividing the flood resistance conditions of bridges into different levels, it not only optimizes the bridge maintenance strategy, but also improves the maintenance efficiency, effectively reduces the threat of flood disasters to the safe and stable operation of the highway transportation system, and provides a new solution for the detection and evaluation of the flood resistance capacity of bridges.

[0134] See also Figure 2 , Figure 2It is a structural diagram of a highway bridge flood resistance capacity detection and assessment system in an embodiment of the present invention. The system includes an input device, a processor, an output device and a memory; the input device includes a real-time monitoring module and a data collection module; the processor includes a multi-factor model construction module, a data analysis module and a flood control quality assessment and feedback module; the output device includes a prediction and discrimination module and an abnormal situation warning module; the input device, the processor, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the system uses the highway bridge flood resistance capacity detection and assessment method, and the specific operation process is as follows Figure 3 shown.

[0135] In this embodiment, the real-time monitoring module is used to monitor various structures of the bridge in real time and obtain real-time data on flood control; The data collection module is used to collect flood control data on the flood control status of the superstructure after the flood, the water-passing section, the width of the river channel at the bridge site, the offset of the bridge hole, floating objects during the flood season, the foundation burial depth, the erosion of the pier, the slope protection of the cone, and the flood control data of the adjustment structure, and to organize and analyze the flood control data to identify the key factors affecting the flood control capacity; The multi-factor model building module is used to build a multi-factor impact model, which comprehensively considers the mutual impact between various key factors; The data analysis module is used to comprehensively analyze the flood resistance capacity of the bridge based on the identified key factors and the influence between the various factors; The prediction and discrimination module is used to output the structural status and trend of the future time period based on the real-time monitoring data; The abnormal situation warning module is used to compare the detection data with the predicted situation, generate a comparison result, extract features of the data exceeding the threshold, analyze the abnormal cause and output an abnormal report, and make adjustment measures in the flood season under the same or similar situation in the future based on the abnormal report; The flood control quality assessment and feedback module is used to comprehensively assess the flood control status of the bridge and provide information feedback.

[0136] Therefore, the highway bridge flood resistance capacity detection and assessment system provided by the present invention can efficiently and accurately obtain various key data of the bridge during the flood period through the real-time monitoring module and the data collection module, provide comprehensive and real-time data support for the bridge flood resistance capacity assessment, and significantly improve the accuracy and timeliness of the assessment; through the multi-factor model construction module, comprehensively consider various factors such as geology, meteorology, and bridge structure type to construct a flood resistance capacity assessment model that fits the reality; through the data analysis module, deeply explore the relationship between data, provide a scientific basis for the flood control quality assessment and feedback module, make the assessment result more objective and comprehensive, and effectively guide the flood resistance reinforcement work of the bridge; through the prediction and judgment module and the abnormal situation warning module, timely issue warning signals, identify and respond to potential flood risks at an early stage, effectively reduce the threat of floods to highway bridges, ensure the stable operation of the transportation network, and improve the efficiency and safety of disaster response.

[0137] In summary, the present invention refines the detection and evaluation indicators and adopts the hierarchical analysis method to establish a calculation model for evaluating the flood resistance level of highway bridges, which effectively reduces human interference, significantly improves the evaluation accuracy, provides strong support for bridge safety maintenance, and supplements and improves the current standard content.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for detecting and evaluating the flood resistance capacity of a highway bridge, characterized in that: The method comprises the following steps: Obtain flood resistance data for highway bridges; Determining flood control assessment indicators based on the flood control data; Based on the flood resistance evaluation index, a flood resistance performance scoring model for highway bridges is constructed; Obtaining a flood resistance performance score according to the flood resistance performance scoring model; According to the flood resistance performance score, an assessment interval of the bridge flood resistance level is set; Comparing the flood resistance performance score with the assessment interval to determine the flood resistance level of the highway bridge; The flood resistance level of highway bridges is used to detect and evaluate the flood resistance capacity of highway bridges.

2. A method for detecting and evaluating the flood resistance of a highway bridge according to claim 1, characterized in that: The acquisition of flood control data of highway bridges includes: Obtain data on the displacement, lateral connections, bearings, stops and limit positions of the bridge superstructure; Obtain data on the actual water area and maximum water level under the bridge; Obtain data on the width of the river at the bridge site; Obtain data on the degree of offset of the bridge opening relative to the river centerline; Obtain data on floating debris conditions in the river section at the bridge location during flood season; Obtain data on the buried depth of deep and shallow foundations; Obtain data on erosion and spalling of the pier surface; Obtain the data of cone slope protection; Get data for adjusting structures.

3. A method for detecting and evaluating the flood resistance of a highway bridge according to claim 1, characterized in that: Determining flood control assessment indicators based on the flood control data includes: Based on the flood control data, the flood control status of the bridge superstructure, the water-passing section, the foundation burial depth, the cone slope protection, the river channel width at the bridge site, floating objects during the flood season, pier erosion, bridge hole offset and adjustment structure indicators are determined.

4. A method for detecting and evaluating the flood resistance of a highway bridge according to claim 1, characterized in that: The flood resistance performance scoring model of the highway bridge constructed based on the flood resistance evaluation index includes: Based on the flood control assessment index, according to the flood control assessment index classification table, the flood control assessment index type is determined, and the flood control assessment index type includes important flood control assessment indicators and general flood control assessment indicators; Based on the flood resistance assessment index types, a flood resistance performance scoring model for highway bridges is constructed.

5. A method for detecting and evaluating the flood resistance capacity of a highway bridge according to claim 4, characterized in that: The important flood resistance assessment indicators include the flood resistance status of the bridge superstructure, the water-passing section, the foundation burial depth and the cone slope protection indicators.

6. A method for detecting and evaluating the flood resistance of a highway bridge according to claim 4, characterized in that: The general flood prevention assessment indicators include the river channel width at the bridge site, floating objects during the flood season, pier erosion, bridge hole offset and regulating structure indicators.

7. A method for detecting and evaluating the flood resistance of a highway bridge according to claim 4, characterized in that: The flood resistance performance scoring model satisfies the following expression: , in, represents the bridge flood resistance performance score, Indicates the maximum deduction score for important flood control assessment indicators. It represents the average value of deduction points for general flood control assessment indicators.

8. A method for detecting and evaluating the flood resistance of a highway bridge according to claim 1, characterized in that: The comparing the flood resistance performance score with the assessment interval to determine the flood resistance level of the highway bridge includes: When the flood resistance performance score falls within the evaluation interval (90,100], the flood resistance level of the highway bridge is level one; When the flood resistance performance score falls within the evaluation interval (70,90], the flood resistance level of the highway bridge is level 2; When the flood resistance performance score falls within the evaluation interval (40,70], the flood resistance level of the highway bridge is level three; When the flood resistance performance score falls within the evaluation interval (0,40], the flood resistance level of the highway bridge is level four.

9. A highway bridge flood resistance capacity detection and assessment system, the system using a highway bridge flood resistance capacity detection and assessment method according to any one of claims 1 to 8, characterized in that: The system includes an input device, a processor, an output device and a memory, wherein the input device, the processor, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the system uses the method for detecting and evaluating the flood resistance capacity of a highway bridge.

10. A highway bridge flood resistance detection and assessment system according to claim 9, characterized in that: The input device includes a real-time monitoring module and a data collection module; the processor includes a multi-factor model building module, a data analysis module and a flood control quality assessment and feedback module; the output device includes a prediction and discrimination module and an abnormal situation warning module.

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