Method and device for detecting health state of reinforced concrete box girder bridge

Abstract

The invention relates to the technical field of bridge detection, and discloses a method for detecting the health state of a reinforced concrete box girder bridge, and the method comprises the steps: obtaining the detection position of a to-be-detected reinforced concrete box girder bridge; the real-time temperature of the detection position is obtained, timing is started when the real-time temperature of the detection position reaches the preset standard temperature, and the first deformation quantity of the detection position is obtained when the preset duration time is reached; when the real-time temperature of the detection position is within the preset temperature range, a second deformation quantity of the detection position is obtained; the preset temperature range is lower than the standard temperature; and determining the health state of the reinforced concrete box girder bridge to be detected according to the first deformation quantity and the second deformation quantity. According to the method, the health state of the reinforced concrete box girder bridge can be determined more conveniently. The invention further discloses a device for detecting the health state of the reinforced concrete box girder bridge.

Description

Technical Field

[0001] The present application relates to the technical field of bridge detection, for example, to a method and device for detecting the health status of a reinforced concrete box girder bridge. Background Art

[0002] During the long-term use of bridges, various factors such as load, environmental erosion, material aging, etc. may cause damage to the bridge structure. These damages will cause the stiffness of the bridge to decrease, and then increase the deflection. Therefore, by monitoring the changes in deflection, the health status of the bridge structure can be discovered in time.

[0003] In order to discover potential safety hazards in a timely manner, it is usually necessary to test the health status of the bridge so that necessary maintenance, reinforcement or renovation measures can be taken when problems are found to ensure the safety of the bridge during use.

[0004] The existing technologies for evaluating the bearing capacity of bridges mainly include appearance survey and load test. At present, the pressure load test is the main test method. Unfortunately, although the pressure load test can directly reflect the real stiffness of the bridge and the internal force of the key section, it has many problems such as high cost, complex scheme and poor safety.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method and a device for detecting the health status of a reinforced concrete box girder bridge, so as to more conveniently detect the health status of a reinforced concrete box girder bridge.

[0008] In some embodiments, the method includes: obtaining the inspection position of the reinforced concrete box girder bridge to be inspected; obtaining the real-time temperature of the inspection position, starting timing when the real-time temperature of the inspection position reaches a preset standard temperature, and obtaining a first deformation value of the inspection position when a preset duration is reached; when the real-time temperature of the inspection position is within a preset temperature range, obtaining a second deformation value of the inspection position; the preset temperature range is lower than the standard temperature; and determining the health status of the reinforced concrete box girder bridge to be inspected based on the first deformation value and the second deformation value.

[0009] In some embodiments, the device includes: a detection position acquisition module, configured to acquire the detection position of the reinforced concrete box girder bridge to be inspected; a first deformation amount acquisition module, configured to acquire the real-time temperature of the detection position, start timing when the real-time temperature of the detection position reaches a preset standard temperature, and acquire the first deformation amount of the detection position when the preset duration is reached; a second deformation amount acquisition module, configured to acquire the second deformation amount of the detection position when the real-time temperature of the detection position is within a preset temperature range; the preset temperature range is lower than the standard temperature; a health status detection module, configured to determine the health status of the reinforced concrete box girder bridge to be inspected based on the first deformation amount and the second deformation amount.

[0010] The method and device for detecting the health status of a reinforced concrete box girder bridge provided by the embodiments of the present disclosure can achieve the following technical effects:

[0011] After the temperature at the detection position reaches the standard, a temperature load is formed after a preset time. The deformation degree corresponding to the temperature load can reflect the health status of some reinforced concrete box girder bridges. At the same time, the deformation obtained when the temperature at the detection position returns to the preset temperature can reflect the recovery of the bridge after the temperature load at this location is cancelled. Therefore, the combination of these two deformations can determine the health status of the reinforced concrete box girder bridge. If the traditional pressure load method is used to detect the health status of the bridge, it usually requires a vehicle loaded with heavy objects to implement it. Since the temperature load method is used, it does not need to be implemented by a vehicle loaded with heavy objects, so the cost is lower and it is more convenient in the implementation of the detection process.

[0012] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0014] Figure 1 is a schematic diagram of a method for detecting the health status of a reinforced concrete box girder bridge provided by an embodiment of the present disclosure;

[0015] Figure 2 is a schematic diagram of a method for obtaining a location data table provided by an embodiment of the present disclosure;

[0016] Figure 3 is a schematic diagram of a method for determining a pressure load range corresponding to a target position provided by an embodiment of the present disclosure;

[0017] Figure 4 is a schematic diagram of another method for determining a pressure load range corresponding to a target position provided by an embodiment of the present disclosure;

[0018] Figure 5 It is a schematic diagram of a device for detecting the health status of a reinforced concrete box girder bridge provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0020] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0021] Unless otherwise stated, the term "plurality" means two or more.

[0022] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0023] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0024] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0025] Combination Figure 1 As shown, the embodiment of the present disclosure provides a method for detecting the health status of a reinforced concrete box girder bridge, comprising:

[0026] Step S101, obtaining the detection position of the reinforced concrete box girder bridge to be detected. The detection position is a position on the reinforced concrete box girder bridge to be detected. For example, the detection position is the center point of the bridge deck of the reinforced concrete box girder bridge to be detected. Alternatively, the detection position is an area on the bridge deck of the reinforced concrete box girder bridge to be detected that is covered by a circle with a preset length as the radius and the center point of the bridge deck as the origin.

[0027] Step S102, obtaining the real-time temperature of the detection position, starting timing when the real-time temperature of the detection position reaches a preset standard temperature, and obtaining the first deformation amount of the detection position when the recorded time reaches a preset duration.

[0028] Step S103, when the real-time temperature of the detection position is within a preset temperature range, a second deformation amount of the detection position is obtained, wherein the preset temperature range is lower than the standard temperature.

[0029] Step S104, determining the health status of the reinforced concrete box girder bridge to be inspected according to the first deformation amount and the second deformation amount.

[0030] In some embodiments, the above method for detecting the health status of a reinforced concrete box girder bridge is applied to a server or a computer. Optionally, the server or computer measures the deformation of the bridge through a laser displacement meter to obtain the deformation variable. Optionally, the server or computer measures the deformation of the bridge through a CCD sensor to obtain the deformation variable. The above two methods of obtaining the deformation variable are prior art and are not described in detail here. In some embodiments, the server or computer obtains the real-time temperature of the detection position through a temperature sensor. The temperature sensor is arranged at the detection position of the bridge, that is, the position of the temperature sensor is the detection position of the reinforced concrete box girder bridge to be detected. The temperature sensor is arranged behind the reinforced concrete box girder bridge to be detected. The server or computer receives the position of the temperature sensor input by the user, and stores it as the detection position of the reinforced concrete box girder bridge to be detected. When obtaining the detection position of the reinforced concrete box girder bridge to be detected, the position is called from the preset database.

[0031] By implementing the above technical solution, after the temperature at the detection position reaches the standard, a temperature load is formed through a preset time. The deformation degree corresponding to the temperature load can reflect the health status of some reinforced concrete box girder bridges. At the same time, the deformation amount obtained when the temperature at the detection position returns to the preset temperature can reflect the recovery of the bridge after the temperature load at this location is cancelled. Therefore, the combination of these two deformation amounts can determine the health status of the reinforced concrete box girder bridge. If the traditional pressure load method is used to detect the health status of the bridge, it usually requires a vehicle loaded with heavy objects to implement it. Since the temperature load method is adopted, it does not need to be implemented by a vehicle loaded with heavy objects, so the cost is lower and it is more convenient in the implementation of the detection process.

[0032] Further, determining the health status of the reinforced concrete box girder bridge to be tested according to the first deformation amount and the second deformation amount includes: when the first deformation amount is less than or equal to the first preset deformation threshold, and the second deformation amount is less than or equal to the second preset deformation threshold, determining that the reinforced concrete box girder bridge to be tested is in a healthy state. Otherwise, determining that the reinforced concrete box girder bridge to be tested is in an unhealthy state. Wherein, the first preset deformation threshold is greater than the second preset deformation threshold.

[0033] The first preset deformation threshold represents the maximum deformation amount at the detection position of the reinforced concrete box girder bridge to be detected. The second preset deformation threshold represents the normal deformation amount at the detection position of the reinforced concrete box girder bridge to be detected.

[0034] In some embodiments, the real-time temperature of the detection position of the reinforced concrete box girder bridge to be detected is obtained in real time, and the first deformation amount of the detection position is obtained when the real-time temperature of the detection position reaches the standard temperature and lasts for a preset duration. The first deformation amount is less than or equal to the first preset deformation threshold. Then, after the real-time temperature begins to decrease, when the real-time temperature is in the preset temperature range, the second deformation amount of the detection position is obtained. The second deformation amount is less than or equal to the second preset deformation threshold. At this time, it can be determined that the reinforced concrete box girder bridge to be detected is healthy. That is, when the real-time temperature of the detection position of the reinforced concrete box girder bridge to be detected continues to rise, the deformation amount of its detection position does not reach the maximum deformation amount, and after the real-time temperature decreases, the deformation amount of the detection position can be restored to below the normal deformation amount, which indicates that the reinforced concrete box girder bridge to be detected is in a healthy state. In this way, the health state of the reinforced concrete box girder bridge can be determined by combining the deformation amount of the detection position of the reinforced concrete box girder bridge to be detected when it is continuously at the standard temperature and the deformation amount in the preset temperature range after the temperature decreases. Thereby, the health state of the reinforced concrete box girder bridge is more conveniently detected.

[0035] In some embodiments, when obtaining the real-time temperature of the detection position, it also includes: when the real-time temperature of the detection position does not reach the preset standard temperature, predicting whether the detection position can reach the preset standard temperature after a preset time period in the future. In the case where it is predicted that the detection position cannot reach the preset standard temperature after a preset time period in the future, triggering the auxiliary heating device corresponding to the detection position to heat the detection position. In the case where it is predicted that the preset standard temperature can be reached after a preset time period in the future, the auxiliary heating device corresponding to the detection position is not triggered to heat the detection position, and the real-time temperature of the detection position continues to be obtained in real time.

[0036] In some embodiments, the computer or server triggers an auxiliary heating device that can heat the inspection position of the reinforced concrete box girder bridge to be inspected to increase the temperature of the inspection position. Optionally, the auxiliary heating device is an electric heating coil. Optionally, the auxiliary heating device is an infrared heating device. The infrared heating device converts electrical energy into infrared radiation energy through infrared radiation, and the bridge pavement absorbs the radiation energy and quickly converts it into heat energy, thereby rapidly heating the bridge pavement.

[0037] By implementing the above technical solution, even if it is detected that the detection position has not yet reached the preset standard temperature, it is possible to determine whether to control the auxiliary heating device to heat the detection position by judging whether the preset standard temperature can be reached later. Otherwise, the temperature may be insufficient and the temperature load cannot be effectively applied.

[0038] Further, predicting whether the detection location can reach a preset standard temperature after a preset time period in the future includes: obtaining the highest temperature of the current month corresponding to the detection location, and obtaining the time required for the detection location to reach the highest temperature from a preset starting temperature. In some embodiments, when there are multiple highest temperatures, the time required for the detection location to reach the highest temperature from the preset starting temperature is the longest time among the multiple required times. The preset starting temperature is less than the highest temperature of the current month.

[0039] Determine the temperature rise state corresponding to the detection position at the current moment from the preset temperature rise state table. A preset number of temperature rise states are set in the temperature rise state table. Temperature rise states include continuous temperature rise, temperature maintenance and continuous temperature drop. Among them, the preset number is at least two. The temperature rise state table divides a day into a plurality of continuous time periods according to a preset number. For example, the preset number is 24, and a day is divided into 24 time periods. There are 24 temperature rise states set in the temperature rise state table. That is, each time period corresponds to a temperature rise state.

[0040] When the temperature rise state corresponding to the detection position at the current moment is continuous temperature rise, the continuous temperature rise time length from the current moment to the temperature rise state change in the temperature rise state table is obtained. According to the real-time temperature of the detection position, the continuous temperature rise time length, the maximum temperature and the time required for the detection position to reach the maximum temperature from the preset starting temperature, it is predicted whether the detection position can reach the preset standard temperature after a preset time period in the future.

[0041] The heating state changes from continuous heating to maintaining temperature, or from continuous heating to continuous cooling. Because the heating state corresponding to the detection position at the current moment is continuous heating. When the heating state changes, that is, the heating state changes from continuous heating to maintaining temperature or continuous cooling. That is, when the heating state changes, the real-time temperature of the detection position no longer continues to rise. In this way, the length of the continuous heating time is the time period from the current moment to the time when the heating state changes.

[0042] Further, based on the real-time temperature of the detection location, the length of time of continuous heating, the maximum temperature, and the time required for the detection location to reach the maximum temperature from the preset starting temperature, it is predicted whether the detection location can reach the preset standard temperature after a preset time period in the future, including:

[0043] When the maximum temperature is greater than or equal to the preset standard temperature, and the real-time temperature of the detection position reaches the preset real-time temperature threshold, it is determined whether the length of the continuous heating time is greater than or equal to the time required for the detection position to reach the maximum temperature from the preset starting temperature. When the length of the continuous heating time is greater than or equal to the time required for the detection position to reach the maximum temperature from the preset starting temperature, it is predicted that the detection position will be able to reach the preset standard temperature after a preset time period in the future. Otherwise, it is predicted that the detection position will not be able to reach the preset standard temperature after a preset time period in the future. Because the duration of continuous heating is greater than the time required to reach the maximum temperature from the preset starting temperature, the temperature of the detection position may reach the maximum temperature. The maximum temperature is higher than the standard temperature, so in this case, it can be predicted that the detection position will be able to reach the preset standard temperature after a preset time period in the future. In one embodiment, the preset time period in the future is greater than or equal to the time required for the detection position to reach the maximum temperature from the preset starting temperature.

[0044] Optionally, after the auxiliary heating device corresponding to the detection position is triggered to heat the detection position, it also includes: when the detection position reaches a preset reference temperature threshold and continues for a preset load time, the auxiliary heating device corresponding to the detection position is triggered to stop heating the detection position.

[0045] In some embodiments, the preset reference temperature threshold is greater than or equal to the preset standard temperature. The load duration is a preset value. After the detection position is heated by the auxiliary heating device, if the temperature of the detection position is greater than or equal to the preset reference temperature threshold for a preset load duration, the auxiliary heating device is triggered to stop heating the detection position.

[0046] Optionally, after obtaining the inspection position of the reinforced concrete box girder bridge to be inspected, the method further includes: judging whether the inspection position of the reinforced concrete box girder bridge to be inspected is suitable for testing the bridge state using temperature load.

[0047] Optionally, judging whether the inspection position of the reinforced concrete box girder bridge to be inspected is suitable for testing the bridge state using temperature load includes: performing a table lookup operation in a preset position data table using the inspection position of the reinforced concrete box girder bridge to be inspected to determine whether the inspection position is suitable for testing the bridge state using temperature load.

[0048] In one embodiment, the preset position data table stores position information suitable for testing the bridge state using temperature load. Therefore, when the detection position of the reinforced concrete box girder bridge to be detected is found in the preset position data table, it is determined that the detection position is suitable for testing the bridge state using temperature load. For example, the position information stored in the preset position data table includes: the area covered by a circle with a preset length as the radius on the bridge deck of A Bridge in Jiangbei District, Chongqing City, with the center of the bridge deck as the origin; and also stores: the area covered by a circle with a preset length as the radius on the bridge deck of B Bridge in Nan'an District, Chongqing City, with the center of the bridge deck as the origin. The reinforced concrete box girder bridge to be detected is A Bridge in Jiangbei District, Chongqing City. The detection position of the reinforced concrete box girder bridge to be detected is the area covered by a circle with a preset length as the radius on the bridge deck of A Bridge in Jiangbei District, Chongqing City, with the center of the bridge deck as the origin. In this way, by performing a table lookup operation in the position data table, it is determined that the area covered by a circle with a preset length as the radius on the bridge deck of A Bridge in Jiangbei District, Chongqing City, with the center of the bridge deck as the origin, is suitable for testing the bridge state using temperature load.

[0049] In one embodiment, the preset position data table stores position information and marking information corresponding to each position information. The marking information includes suitable or unsuitable. The marking information being suitable indicates that the corresponding position is suitable for testing the bridge state using temperature load. The marking information being unsuitable indicates that the corresponding position is unsuitable for testing the bridge state using temperature load. The marking information corresponding to the position information matching the detection position is found in the preset position data table. When the found marking information is suitable, it is determined that the detection position is suitable for testing the bridge state using temperature load. When the found marking information is unsuitable, it is determined that the detection position is unsuitable for testing the bridge state using temperature load. Wherein, if the detection position of the reinforced concrete box girder bridge to be detected is the same as the position information in the position data table, it is determined that the detection position matches the position information. Alternatively, if the detection position of the reinforced concrete box girder bridge to be detected belongs to the position information in the position data table, it is determined that the detection position matches the position information.

[0050] For example, the location information stored in the preset location data table includes: the area covered by a circle with a preset length as the radius and the center of the bridge deck as the origin on the bridge deck of A Bridge in Jiangbei District, Chongqing, and the mark information corresponding to the location information is suitable; it also stores: the area covered by a circle with a preset length as the radius and the center of the bridge deck as the origin on the bridge deck of C Bridge in Daxing District, Beijing, and the mark information corresponding to the location information is not suitable, etc. The reinforced concrete box girder bridge to be tested is A Bridge in Jiangbei District, Chongqing. The detection position of the reinforced concrete box girder bridge to be tested is the area covered by a circle with a preset length as the radius and the center of the bridge deck as the origin on the bridge deck of A Bridge in Jiangbei District, Chongqing. In this way, by performing a table lookup operation in the location data table, it is found that the mark information corresponding to the detection position of the reinforced concrete box girder bridge to be tested is suitable, and it is determined that the area covered by a circle with a preset length as the radius and the center of the bridge deck as the origin on the bridge deck of A Bridge in Jiangbei District, Chongqing is suitable for testing the bridge state using temperature load.

[0051] Combination Figure 2 As shown, further, the position data table is obtained by:

[0052] Step S201, obtaining a target location from a location set. The target location is location information for which it is to be determined whether it is suitable for testing the bridge state using a temperature load. The location set includes multiple location information.

[0053] In some embodiments, the location information input by the user is accepted and stored in the location set to realize the generation or update of the location set. In some embodiments, the location information is a preset area on the bridge within the geographical location. Optionally, the geographical location includes a province, for example, Sichuan Province, Guangdong Province, etc. Optionally, the geographical location includes a city, for example, Chongqing City, Shenzhen City, etc. Optionally, the geographical location includes a district, a county, etc., for example, Yuzhong District, Yubei District, etc. For example, the preset area is the area covered by a circle with the center of the bridge deck as the origin and a preset length as the radius on the bridge deck. For example, the location information is the area covered by a circle with the center of the bridge deck as the origin and a preset length as the radius on Bridge A in Jiangbei District, Chongqing. In some embodiments, the target location is any location information in the location set. In some embodiments, the target location is the first location information in the location set.

[0054] Step S202, obtaining sunshine information corresponding to the target location. The sunshine information includes the sunshine exposure of the target location within a preset time period. For example, the preset time period is the past N years, or the past year, or the past six months, etc., where N is a positive integer greater than 1.

[0055] Step S203, determining the pressure load range corresponding to the target position according to the sunshine information.

[0056] Step S204, determining whether the target position is suitable for testing the bridge state using a temperature load according to the pressure load range corresponding to the target position.

[0057] Step S205, storing the location information suitable for testing the bridge state using temperature load into a preset location data table. Alternatively, adding mark information as suitable to the location information suitable for testing the bridge state using temperature load in the location set, adding mark information as unsuitable to the target location in the location set that is not suitable for testing the bridge state using temperature load, and storing all the location information with added mark information and the corresponding mark information into a preset location data table.

[0058] In this way, by obtaining the sunlight exposure at the target position within a preset time period, and based on this, determining the pressure load range corresponding to the target position. In this way, the temperature change caused by sunlight can be used to measure the pressure load range that the target position may correspond to, so that it can be determined whether the target position is suitable for using temperature load to test the bridge state according to the pressure load range corresponding to the target position.

[0059] Furthermore, obtaining sunshine information corresponding to the target position includes: using the target position to perform a table lookup operation in a preset sunshine information table to obtain sunshine information corresponding to the target position. The sunshine information table stores position information, sunshine information, and the corresponding relationship between the position information and the sunshine information. The position information includes the target position. The position information is the position information stored in the position set. In this way, the sunshine information corresponding to the target position can be quickly obtained, so as to determine whether the position is suitable for testing the health status of the bridge using temperature load.

[0060] In some embodiments, the sunshine information includes multiple sunshine duration periods, the light intensity corresponding to each sunshine duration period, and the bridge deformation displacement corresponding to each sunshine duration period. The multiple sunshine duration periods are multiple sunshine duration periods within a preset time period. For example, the sunshine duration period is the sunshine duration period of each day in the past year. For another example, the sunshine duration period is the sunshine duration period of each month in the past N years.

[0061] In one embodiment, the sunshine information table is obtained in the following manner: using the weather forecast, the light intensity of the geographical location corresponding to each location information in the location set in multiple sunshine duration periods within a preset time period is obtained, and the corresponding relationship between it and the location information is stored in the preset sunshine information table. A CCD sensor is set at the position corresponding to each location information, and the CCD sensor is used to obtain the bridge deformation displacement corresponding to each sunshine duration period, and the corresponding relationship between it and the location information is stored in the preset sunshine information.

[0062] Combination Figure 3As shown, further, the pressure load range corresponding to the target position is determined according to the sunshine information, including:

[0063] Step S301: Determine the lighting stability corresponding to the target position.

[0064] Step S302: Determine a temperature load reference value that can be obtained at the target location according to the sunshine duration periods and the light intensity corresponding to each sunshine duration period.

[0065] Step S303: determine the pressure load range corresponding to the target location according to the illumination stability corresponding to the target location, the temperature load reference value, and the bridge deformation displacement corresponding to each sunshine duration period.

[0066] In some embodiments, in step S301, the sunshine information is obtained by accepting and storing multiple sunshine duration periods input by the user, the light intensity corresponding to each sunshine duration period, and the bridge deformation displacement corresponding to each sunshine duration period.

[0067] In some embodiments, in step S301, a light sensor collects light intensity and records the corresponding time to obtain multiple sunshine duration periods and the light intensity corresponding to each sunshine duration period, and receives and stores the deformation displacement of the bridge corresponding to each sunshine duration period input by the user. Optionally, the light sensor starts timing when it detects that the light intensity reaches a set threshold, and ends timing when it detects that the light intensity does not reach the set threshold, thereby obtaining the sunshine duration period. When uploading the light intensity, the light sensor records the upload time, thereby obtaining the month and year corresponding to the sunshine information. In the above manner, it is possible to obtain sunshine year information, sunshine month information, multiple sunshine duration periods corresponding to the sunshine month information, and light intensity corresponding to each sunshine duration period.

[0068] In some embodiments, step S301 determines the illumination stability corresponding to the target position, including: using the target position to perform a table lookup operation in a preset illumination stability data table to obtain the illumination stability corresponding to the target position. The illumination stability data table stores position information, illumination stability, and a mapping relationship between position information and illumination stability.

[0069] For example, Table 1 is an example table of illumination stability data. As can be seen from Table 1, the corresponding stability can be queried as 23.54 through the preset area of ​​the bridge deck of A bridge in region 1, the stability can be queried as 1.00 through the preset area of ​​the bridge deck of D bridge in region 4, and the stability can be queried as 0.57 through the preset area of ​​the bridge deck of C bridge in region 3. In some embodiments, the closer the stability is to the preset value, the more stable it is. In some embodiments, the preset value is 1, and the smaller the absolute value of the difference between the stability of the region and 1, the more stable it is.

[0070] Table 1 Example of light stability data

[0071] Location Information Light stability Preset area of ​​bridge deck of A bridge in Region 1 23.54 Preset area of ​​bridge deck of B bridge in region 2 17.66 Preset area of ​​the bridge deck of C Bridge in Region 3 0.57 Preset area of ​​the bridge deck of D Bridge in Region 4 1.00 Preset area of ​​the bridge deck of E Bridge in Region 5 6.98

[0072] When the light stability data table is preset, the light stability is obtained in the following way:

[0073] Get the length of the light duration period for each month in multiple years GSC ij , the number of light duration periods for each month in multiple years GS in .GSC ij is the length of the jth light duration period in the i-th month of each year, 1≤i≤12, j is a positive integer. GS i is the number of sunshine duration segments in the i-th month of each year. For example, obtain the sunshine duration segments of each month in 2010 / 2015 / 2020, and obtain the sunshine duration segment length value and sunshine duration segment number value of each month in the three years. For example, GSC in 2010 123 is the length of the third light duration period in December 2010, GSC in 2015 74 is the length of the 4th light duration period in July 2015. In January 2020, 23 light duration periods are monitored, then GS1 in 2020 is the number of light duration periods in January 2020, and the number of light duration periods is 23. Optionally, the light duration period is obtained by starting the timing when the light intensity reaches a set threshold and ending the timing when it is monitored that the light intensity does not reach the set threshold, that is, the light intensity within the light duration period needs to reach the set threshold.

[0074] For each year, calculate Obtain the annual light stability parameter for each year. Among them, NC is the annual light stability parameter, α is the preset first weight, α>0, β is the preset second weight, β>0, YGC i is the preset reference threshold of the duration of the light period in the ith month, YG i is the preset reference threshold value for the number of illumination duration segments in the ith month. The annual illumination stability parameter obtained in the above manner takes into account the differences in illumination between different months, and weights the duration of illumination and the illumination frequency of the month, which can effectively reflect the illumination stability of each year. Optionally, β>α. Since the number of illumination duration segments can better reflect the stability of illumination than the length of the illumination duration segments, by making the threshold value related to the number of illumination duration segments relatively higher, the illumination stability corresponding to the location information can be better evaluated.

[0075] calculate Obtain the illumination stability corresponding to the target position. Among them, NC max is the largest annual light stability parameter among the annual light stability parameters of each year, NC min is the minimum annual light stability parameter among the annual light stability parameters of each year, NC last is the annual light stability parameter for the last year, NC first is the annual light stability parameter for the first year, δ is the preset value, δ>0. The light stability obtained in the above way not only takes into account the difference in light between different months, and weightedly combines the duration of light and the light frequency of the month, but more importantly, takes into account the time span of multiple years, making the evaluation of light stability more accurate and reliable.

[0076] In some embodiments, step S302 determines the temperature load reference value that can be obtained at the target location according to the sunshine duration period and the light intensity corresponding to each sunshine duration period, including:

[0077] According to the duration of the sunshine duration and its corresponding light intensity, a table lookup operation is performed in a preset temperature load data table to obtain a temperature load reference value that can be obtained at the target location. The temperature load data table stores a mapping relationship between the duration of the sunshine duration, the light intensity, and the duration and light intensity corresponding to the temperature load reference value. In some embodiments, each sunshine duration corresponding to the target location corresponds to a temperature load reference value.

[0078] Combination Figure 4 As shown, in some embodiments, step S303 determines the pressure load range corresponding to the target position according to the illumination stability corresponding to the target position, the temperature load reference value, and the bridge deformation displacement corresponding to each sunshine duration period, including:

[0079] Step S401, using the illumination stability and temperature load reference values ​​corresponding to the target position, the deformation displacement of the bridge corresponding to each sunshine duration period is adjusted to obtain the adjusted bridge deformation displacement reference values ​​for each sunshine duration period.

[0080] Step S402, determining the pressure load range corresponding to the target position according to the bridge deformation displacement reference values ​​adjusted for each sunshine duration period.

[0081] In some embodiments, step S401 uses the illumination stability and temperature load reference values ​​corresponding to the target position to adjust the bridge deformation displacement corresponding to each sunshine duration period, and obtains the bridge deformation displacement reference values ​​adjusted for each sunshine duration period, including:

[0082] Step S4011, calculate J p=γ×(WHZCK p -YSWH), and obtain the distance adjustment value. p is the distance adjustment value corresponding to the pth sunshine duration period corresponding to the target position, γ is the stability weight corresponding to the target position, WHZCK p is the temperature load reference value corresponding to the pth sunshine duration period corresponding to the target position, YSWH is the preset temperature load standard value, and p is a positive integer. Among them, γ is obtained by the following method: using the light stability corresponding to the target position to perform a table lookup operation in the preset stability weight data table to obtain the stability weight corresponding to the target position; the stability weight data table stores light stability, stability weight, and the mapping relationship between stability weight and light stability.

[0083] Step S4012, adding the distance adjustment value corresponding to the p-th sunshine duration period corresponding to the target position and the bridge deformation displacement corresponding to the p-th sunshine duration period corresponding to the target position to obtain the bridge deformation displacement reference values ​​adjusted for each sunshine duration period.

[0084] Since the deformation displacement of the bridge is usually obtained through image recognition by CCD sensors, no matter whether it is uploaded by the user or directly used with the recognized data, the deformation displacement obtained may not be the maximum displacement. In addition, the displacement is also affected by temperature in addition to light. The same lighting time and intensity may also lead to different temperature loads due to different temperatures, and the lighting time period may not be able to be reproduced in the same way. Its stability must be considered to ensure that the test requirements can be met during actual testing. Through the above correction method, the influence of light stability on the test is taken into account, and the influence of displacement data collection and temperature on the theoretical temperature load is reduced, so that the obtained displacement data is more suitable for subsequent pressure load range determination.

[0085] In some embodiments, step S402 determines the pressure load range corresponding to the target position according to the bridge deformation displacement reference values ​​adjusted for each sunshine duration period, including:

[0086] The largest bridge deformation displacement reference value among the bridge deformation displacement reference values ​​adjusted for each sunshine duration period is determined as the bridge deformation displacement final value. The bridge deformation displacement final value is added to the preset first deviation value to obtain the first pressure load deformation value, and the bridge deformation displacement final value is subtracted from the preset second deviation value to obtain the second pressure load deformation value. The first pressure load corresponding to the first pressure load deformation value is obtained, and the second pressure load corresponding to the second pressure load deformation value is obtained. The range between the second pressure load and the first pressure load is determined as the pressure load range corresponding to the target position.

[0087] Optionally, obtaining the first pressure load corresponding to the first pressure load deformation value and obtaining the second pressure load corresponding to the second pressure load deformation value are both achieved by looking up a table. Specifically, the pressure load deformation value is used to perform a table lookup operation in a preset pressure load table to obtain the pressure load corresponding to the pressure load deformation value; the pressure load table stores the pressure load deformation value, the pressure load, and the mapping relationship between the pressure load deformation value and the pressure load.

[0088] Since the materials and / or structures of the bridges may be different, the above method determines the maximum bridge deformation displacement reference value as the bridge deformation displacement final value, and determines the final range in combination with the preset deviation value. The pressure load range can be flexibly adjusted by setting the deviation value, thereby increasing the scope of application of this solution and determining whether more types of bridges are suitable for temperature load bearing capacity status evaluation.

[0089] Optionally, determining whether the target position is suitable for testing the bridge state using a temperature load according to the pressure load range corresponding to the target position includes: determining whether the pressure load range corresponding to the target position includes a preset standard load range. If the pressure load range corresponding to the target position includes the preset standard load range, it is determined that the target position is suitable for testing the bridge state using a temperature load. If the pressure load range corresponding to the target position does not include the preset standard load range, it is determined that the target position is not suitable for testing the bridge state using a temperature load.

[0090] In some embodiments, the pressure load range corresponding to the target position includes a preset standard load range. It can be understood that the preset standard load range belongs to the pressure load range corresponding to the target position, that is, the preset standard load range is a subset of the pressure load range corresponding to the target position.

[0091] Optionally, determining whether the target position is suitable for testing the bridge state using a temperature load according to the pressure load range corresponding to the target position includes: determining whether the pressure load range corresponding to the target position is the same as a preset standard load range. If the pressure load range corresponding to the target position is the same as the preset standard load range, it is determined that the target position is suitable for testing the bridge state using a temperature load. If the pressure load range corresponding to the target position is different from the preset standard load range, it is determined that the target position is not suitable for testing the bridge state using a temperature load.

[0092] In some embodiments, after determining whether the target position is suitable for testing the bridge state using temperature load according to the pressure load range corresponding to the target position, the method further includes: obtaining a similar lighting position of the target position in the position set, wherein the similar lighting position is a position with a lighting condition similar to that of the target position.

[0093] When it is determined that the target position is suitable for testing the bridge state using the temperature load, the similar illumination position is determined as the position information suitable for testing the bridge state using the temperature load. When it is determined that the target position is not suitable for testing the bridge state using the temperature load, the similar illumination position is determined as the position information not suitable for testing the bridge state using the temperature load.

[0094] In some embodiments, obtaining a similar illumination position of a target position in a position set includes: using the target position to perform a table lookup operation in a preset similar position table to obtain a candidate similar position corresponding to the target position; the similar position table stores the target position, the candidate similar position, and a mapping relationship between the target position and the candidate similar position. Then, the candidate similar position in the position set is determined as a similar position of the target position.

[0095] Optionally, when there is still location information in the location set whose suitability for testing the bridge status using temperature load is not yet determined, any location information in the location information whose suitability for testing the bridge status using temperature load is not yet determined is re-determined as the target location for determination.

[0096] The above method can greatly speed up the speed of determining the location information suitable for testing the bridge status using temperature load, quickly determine the similar locations according to the target location, and do not need to traverse and calculate the locations in the location set, thereby improving efficiency and reducing memory overhead. It is only necessary to first determine whether the target location is suitable for testing the bridge status using temperature load, and then quickly find similar locations related to the target location by looking up the table, so that the target location and its similar locations are determined. In this way, even if there is a lot of location information in the location set, the location information suitable for testing the bridge status using temperature load can be determined more quickly.

[0097] Optionally, obtaining the real-time temperature of the inspection position of the reinforced concrete box girder bridge to be inspected includes: when the inspection position of the reinforced concrete box girder bridge to be inspected is suitable for testing the bridge state using temperature load, obtaining the real-time temperature of the inspection position.

[0098] Optionally, obtaining the real-time temperature of the detection position of the reinforced concrete box girder bridge to be detected includes: when the detection position of the reinforced concrete box girder bridge to be detected is not suitable for testing the bridge state using a temperature load, triggering an auxiliary heating device corresponding to the detection position to heat the detection position, and then obtaining the real-time temperature of the detection position. If the detection position of the reinforced concrete box girder bridge to be detected is not suitable for testing the bridge state using a temperature load, it may be because the temperature is not enough and the temperature load cannot be effectively applied. By controlling the auxiliary heating device to heat the detection position, the situation where the temperature load cannot be effectively applied due to insufficient temperature can be avoided.

[0099] Combination Figure 5 As shown, the embodiment of the present disclosure provides a device 500 for detecting the health status of a reinforced concrete box girder bridge. The device includes: a detection position acquisition module 501, a first deformation amount acquisition module 502, a second deformation amount acquisition module 503 and a health status detection module 504. The detection position acquisition module 501 is configured to acquire the detection position of the reinforced concrete box girder bridge to be detected. The first deformation amount acquisition module 502 is configured to acquire the real-time temperature of the detection position, start timing when the real-time temperature of the detection position reaches a preset standard temperature, and acquire the first deformation amount of the detection position when the preset duration is reached. The second deformation amount acquisition module 503 is configured to acquire the second deformation amount of the detection position when the real-time temperature of the detection position is within a preset temperature range; the preset temperature range is lower than the standard temperature. The health status detection module 504 is configured to determine the health status of the reinforced concrete box girder bridge to be detected based on the first deformation amount and the second deformation amount.

[0100] By implementing the above technical solution, after the temperature at the detection position reaches the standard, a temperature load is formed through a preset time. The deformation degree corresponding to the temperature load can reflect the health status of some reinforced concrete box girder bridges. At the same time, the deformation amount obtained when the temperature at the detection position returns to the preset temperature can reflect the recovery of the bridge after the temperature load at this location is cancelled. Therefore, the combination of these two deformation amounts can determine the health status of the reinforced concrete box girder bridge. If the traditional pressure load method is used to detect the health status of the bridge, it usually requires a vehicle loaded with heavy objects to implement it. Since the temperature load method is adopted, it does not need to be implemented by a vehicle loaded with heavy objects, so the cost is lower and it is more convenient in the implementation of the detection process.

[0101] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0102] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0103] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0104] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0105] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting the health status of a reinforced concrete box girder bridge, characterized in that: The method comprises: Obtain the inspection position of the reinforced concrete box girder bridge to be inspected; Acquire the real-time temperature of the detection position, start timing when the real-time temperature of the detection position reaches a preset standard temperature, and acquire the first deformation amount of the detection position when the preset duration is reached; When the real-time temperature of the detection position is within a preset temperature range, obtaining a second deformation amount of the detection position; the preset temperature range is lower than the standard temperature; The health status of the reinforced concrete box girder bridge to be inspected is determined according to the first deformation amount and the second deformation amount.

2. The method according to claim 1, characterized in that Determining the health status of the reinforced concrete box girder bridge to be inspected according to the first deformation amount and the second deformation amount includes: When the first deformation amount is less than or equal to a first preset deformation threshold, and the second deformation amount is less than or equal to a second preset deformation threshold, it is determined that the reinforced concrete box girder bridge to be inspected is in a healthy state; the first preset deformation threshold is greater than the second preset deformation threshold; Otherwise, it is determined that the reinforced concrete box girder bridge to be inspected is in an unhealthy state.

3. The method according to claim 1, characterized in that When obtaining the real-time temperature of the detection position, it also includes: When the real-time temperature of the detection position does not reach the preset standard temperature, predict whether the detection position can reach the preset standard temperature after a preset time period in the future; When it is predicted that the detection position cannot reach the preset standard temperature after a preset time period in the future, the auxiliary heating device corresponding to the detection position is triggered to heat the detection position.

4. The method according to claim 3, characterized in that Predicting whether the detection location can reach a preset standard temperature after a preset time period in the future includes: Obtaining the maximum temperature of the current month corresponding to the detection location, and obtaining the time required for the detection location to reach the maximum temperature from a preset starting temperature; Determine the heating state corresponding to the detection position at the current moment from a preset heating state table; the heating state table is provided with a preset number of heating states, the heating state including continuous heating, temperature maintenance and continuous cooling; the preset number is at least two, the heating state table divides a day into a plurality of continuous time periods according to the preset number, and each time period corresponds to a heating state; When the heating state corresponding to the detection position at the current moment is continuous heating, obtain the length of continuous heating time from the current moment to the change of the heating state in the heating state table; based on the real-time temperature of the detection position, the length of continuous heating time, the maximum temperature and the time required for the detection position to reach the maximum temperature from the preset starting temperature, predict whether the detection position can reach the preset standard temperature after a preset time period in the future.

5. The method according to claim 4, characterized in that Predicting whether the detection location can reach a preset standard temperature after a preset time period in the future according to the real-time temperature of the detection location, the length of the continuous heating time, the maximum temperature, and the time required for the detection location to reach the maximum temperature from a preset starting temperature, includes: When the maximum temperature is greater than or equal to the preset standard temperature, and the real-time temperature of the detection position reaches the preset real-time temperature threshold, determine whether the length of the continuous heating time is greater than or equal to the time required for the detection position to reach the maximum temperature from the preset starting temperature; when the length of the continuous heating time is greater than or equal to the time required for the detection position to reach the maximum temperature from the preset starting temperature, predict that the detection position will be able to reach the preset standard temperature after a preset time period in the future; Otherwise, it is predicted that the detection position will not be able to reach the preset standard temperature after a preset time period in the future.

6. The method according to claim 3, characterized in that After triggering the auxiliary heating device corresponding to the detection position to heat the detection position, the method further includes: When the detection position reaches a preset reference temperature threshold and continues for a preset load time, the auxiliary heating device corresponding to the detection position is triggered to stop heating the detection position.

7. The method according to claim 1, characterized in that After obtaining the detection position of the reinforced concrete box girder bridge to be detected, it also includes: Determine whether the detection position is suitable for testing the bridge state using temperature load.

8. The method according to claim 7, characterized in that Obtaining the real-time temperature of the detection location includes: In the case where the detection location is suitable for testing the bridge state using a temperature load, the real-time temperature of the detection location is obtained.

9. The method according to claim 7, characterized in that: Obtaining the real-time temperature of the detection location includes: In the case that the detection position is not suitable for testing the bridge state by temperature load, the auxiliary heating device corresponding to the detection position is triggered to heat the detection position, and then the real-time temperature of the detection position is obtained.

10. A device for detecting the health status of a reinforced concrete box girder bridge, characterized in that: The device comprises: A detection position acquisition module is configured to acquire a detection position of a reinforced concrete box girder bridge to be detected; A first deformation amount acquisition module is configured to acquire the real-time temperature of the detection position, start timing when the real-time temperature of the detection position reaches a preset standard temperature, and acquire the first deformation amount of the detection position when a preset duration is reached; A second deformation amount acquisition module is configured to acquire a second deformation amount of the detection position when the real-time temperature of the detection position is within a preset temperature range; the preset temperature range is lower than the standard temperature; The health status detection module is configured to determine the health status of the reinforced concrete box girder bridge to be detected according to the first deformation amount and the second deformation amount.

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