A box girder cavity detection system and method based on stress sensor

Abstract

The present application relates to a box girder void detection system and method based on stress sensors. The box girder void detection system includes: a first sensor device, a controller connected to the first sensor, and a wireless network device connected to the controller; the first sensor device includes multiple stress sensors; the controller is configured to: obtain box girder void information, and vertically set the stress sensor in multiple areas to be detected; obtain stress data of each area to be detected to form a stress detection information set; detect each area to be detected according to the stress detection information set, and treat the areas to be detected that do not meet the void detection scoring standards as void detection abnormal areas, generate a first alarm information and send it to the user device. The system and method of the present application can locate the problem more accurately through the application of mechanical sensors, further screen out the void detection abnormal areas from the areas to be detected, and reduce the error of the detection results.

Description

Technical Field

[0001] The present application belongs to the field of mechanical sensor application and construction quality inspection, and in particular, relates to a box girder cavity detection system and method based on stress sensors. Background Art

[0002] Cast-in-place prestressed concrete box girder is a type of bridge structure that directly pours concrete and applies prestress on the construction site. It has the advantages of increasing the bearing capacity of the structure and reducing the occurrence of cracks by applying prestress before the concrete hardens. However, after pouring the concrete, the construction workers need to vibrate it to ensure its density. If the vibration is not sufficient, bubbles and voids will form inside the concrete.

[0003] The box girder void detection in the related art uses ultrasonic technology to monitor the voids of the box girder. For example, taking the real-time monitoring intelligent system for the vibration quality of a cast-in-place box girder disclosed in application number CN202310510341.2 as an example, it adopts ultrasonic detection technology. When the detector sends an electrical signal, it emits an ultrasonic wave, which passes through a wedge made of acrylic acid, enters the test sample, and is scattered by defects in the sample and wedge. After propagation again, it will be converted from mechanical vibration to an electrical signal by the same probe and recorded as a waveform. Based on the casting characteristics of concrete components, an ultrasonic transmitter and receiver device is established, and the real-time control of the concrete vibration density is determined by the vibration waveform, which can reduce the situation of insufficient concrete vibration and reduce the voids formed inside the concrete. However, in the reinforced concrete structure of the box girder, multiple steel bars need to be set, especially when the axis of the steel bar is parallel to the test direction. The influence of the steel bar on the propagation of the ultrasonic wave will lead to inaccurate void detection results, and the test results provided to users are prone to errors.

[0004] Based on this, the present application provides a box girder cavity detection system and method based on stress sensors to improve the relevant technology. Summary of the invention

[0005] In view of the above deficiencies in the prior art, the purpose of the present application is to provide a box girder void detection system and method based on stress sensors, so as to solve the problem that the detection results provided to users by a single void detection are prone to errors.

[0006] In a first aspect of the present application, a box girder cavity detection system based on a stress sensor is proposed, and the box girder cavity detection system comprises:

[0007] A first sensor device, a controller connected to the first sensor, and a wireless network device connected to the controller;

[0008] The first sensor device includes a plurality of stress sensors; the controller is connected to the user equipment through the wireless network device, and the controller is configured to:

[0009] Acquire box girder void information, and vertically set each of the stress sensors at multiple to-be-detected areas on the bottom surface of the box girder according to the box girder void information; the box girder void information is obtained according to a construction plan, the construction plan is a bridge construction plan for indicating on-site construction of cast-in-place prestressed concrete box girders, and the box girder void information includes position range information of each to-be-detected area;

[0010] According to the box girder void information, a static load test method is adopted and the first sensor device is used to obtain stress data of each area to be detected, so as to form a stress detection information set;

[0011] Each area to be detected is detected according to the stress detection information set, and the area to be detected that does not meet the void detection scoring standard is regarded as a void detection abnormal area, and first alarm information for indicating the location of the void detection abnormal area is generated and sent to the user equipment.

[0012] In some optional embodiments, the controller detects each to-be-detected area according to the stress detection information set, and regards the to-be-detected area that does not meet the void detection scoring standard as a void detection abnormal area in the following manner:

[0013] Obtaining a stress detection score for each area to be detected based on the stress detection information set and the initial stress parameters of each area to be detected;

[0014] According to the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected, the cavity detection score of each area to be detected is obtained, and the construction area whose cavity detection score does not meet the cavity detection score standard is regarded as an abnormal cavity detection area.

[0015] In some optional embodiments, the controller obtains the stress detection score of each area to be detected according to the stress detection information set and the initial stress parameters of each area to be detected in the following manner:

[0016] Obtaining a detection score relationship table, wherein the detection score relationship table is used to indicate a corresponding relationship between a change rate and a score;

[0017] According to the change rate between the stress data of each area to be detected and its corresponding initial stress parameter, the score corresponding to each area to be detected in the detection score relationship table is obtained and used as the stress detection score.

[0018] In some optional embodiments, the controller obtains the cavity detection score of each to-be-detected area according to the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area in the following manner:

[0019] The product of the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area is used as the void detection score of each to-be-detected area.

[0020] In some optional embodiments, the construction plan includes:

[0021] According to the preset construction sequence, multiple concrete pump trucks are used to pour concrete in a layered and segmented manner toward both ends; the preset construction sequence includes pouring concrete of the end cross beam, bottom plate, web plate, middle cross beam and end cross beam, roughening and cleaning of the web plate construction joint, and pouring concrete of the top plate and wing plate;

[0022] According to the external environment temperature and the time required for tensioning, geotextile covering and watering are used for concrete curing; and after the formwork is removed, the concrete box girder is covered and cured by watering.

[0023] In some optional embodiments, the box girder cavity detection system further includes a second sensor device, which is connected to the controller. The construction plan further includes pump truck construction information indicating the construction area and construction time of each concrete pump truck. The controller obtains the area to be detected in the following manner:

[0024] According to the pump truck construction information in the construction plan, a vibration scheme is obtained and sent to the user device, wherein the vibration scheme includes a plurality of vibration guidance information, each of which is used to indicate a vibration operation that matches a construction area of ​​each concrete pump truck;

[0025] After the initial setting of the concrete or before the final setting of the concrete, the second sensor device is used to obtain the void detection information of each construction area, and each void detection information and its corresponding vibration guidance information are combined to obtain a void information set;

[0026] According to the void information set, respectively obtain the void quality score of each construction area, and regard the construction area whose void quality score does not meet the first void quality score standard as a vibration operation abnormal area, generate second alarm information for indicating the location of the vibration operation abnormal area, and send it to the user device;

[0027] The construction areas whose void quality scores meet the void quality standards are taken as intermediate inspection areas. The intermediate inspection scores of each intermediate inspection area are obtained according to the void quality scores of the intermediate inspection areas and the first weight data of each intermediate inspection area. The intermediate inspection areas that do not meet the second void quality score standard are taken as areas to be inspected. The position range information, void detection information and the corresponding vibration guidance information of the areas to be inspected are taken as box girder void information. The requirements of the second void quality score standard are higher than those of the first void quality score standard.

[0028] In some optional embodiments, the controller uses the following method to select the middle detection area that does not meet the second cavity quality scoring standard as the area to be detected:

[0029] According to the vibration scheme, the intermediate detection area of ​​each vibration operation team, the vibration time of the intermediate detection area and the corresponding cavity detection information are collected according to the team to obtain a quality information set to be tested;

[0030] According to the quality information set to be measured, obtaining first weight data of each intermediate detection area;

[0031] According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate detection score of each intermediate detection area is obtained, and according to the intermediate detection score of each intermediate detection area, the intermediate detection areas that do not meet the second void quality score standard are used as areas to be inspected.

[0032] In some optional embodiments, the controller obtains the intermediate detection score of each intermediate detection area according to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area in the following manner:

[0033] Obtaining an intermediate evaluation corresponding relationship formula; the intermediate evaluation corresponding relationship formula is used to indicate the corresponding relationship between the intermediate detection score, the void quality score and the first weight data;

[0034] According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate evaluation correspondence formula is used to obtain the intermediate detection score of each intermediate detection area.

[0035] In some optional embodiments, the controller obtains the cavity quality score of each construction area according to the cavity information set in the following manner, and regards the construction area whose cavity quality score does not meet the first cavity quality score standard as the abnormal vibration operation area:

[0036] Inputting the void information set into a void quality scoring model to obtain a void quality score for each construction area;

[0037] When the void quality score of the construction area does not meet the first void quality score standard, the corresponding construction area shall be regarded as an abnormal vibration operation area;

[0038] Among them, the first void quality scoring standard is to sort the void quality scores of all construction areas according to size, and regard multiple construction areas with the lowest void quality scores that meet the preset proportion as abnormal vibration operation areas that do not meet the first void quality scoring standard.

[0039] In a second aspect of the present application, a box girder cavity detection method based on a stress sensor is proposed, which is applied to the box girder cavity detection system based on a stress sensor as described in any one of the first aspects. The box girder cavity detection method comprises:

[0040] Acquire box girder void information, and vertically set each of the stress sensors at multiple to-be-detected areas on the bottom surface of the box girder according to the box girder void information; the box girder void information is obtained according to a construction plan, the construction plan is a bridge construction plan for indicating on-site construction of cast-in-place prestressed concrete box girders, and the box girder void information includes position range information of each to-be-detected area;

[0041] According to the box girder void information, a static load test method is adopted and a first sensor device is used to obtain stress data of each area to be detected, so as to form a stress detection information set;

[0042] Each area to be detected is detected according to the stress detection information set, and the area to be detected that does not meet the void detection scoring standard is regarded as a void detection abnormal area, and first alarm information for indicating the location of the void detection abnormal area is generated and sent to the user equipment.

[0043] The beneficial effects of the present application are as follows: the method and system described in the present application focus on specific areas where voids may exist after construction. The use of mechanical sensors can more accurately locate the problem and avoid unnecessary detection of the entire area, thereby saving time and resources; since the detection range is limited to the area determined by the construction plan, that is, the box girder void information obtained during the construction of the construction plan is utilized, the number of sensors and data processing required for detection can be reduced, thereby improving detection efficiency; targeted detection can reduce the use of sensors and the complexity of data processing, thereby reducing the overall detection cost; since the detection is concentrated in a specific area, the layout and test parameters of the sensor can be adjusted more finely to obtain more accurate stress data; through the stress sensor, targeted stress detection is performed on the area to be detected obtained in the execution of the construction plan, the stress sensor provides a stable detection result that is not affected by steel bars, and further screens out abnormal void detection areas from the area to be detected on the basis of ultrasonic detection, thereby reducing the error of the detection results provided to the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are only used to illustrate specific embodiments and are not considered to limit the present application. In the entire drawings, the same reference symbols represent the same components. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0045] Figure 1 It is a flow chart of a box girder void detection method based on a stress sensor provided in an embodiment of the present application.

[0046] Figure 2 It is a schematic diagram of a process for obtaining an area to be detected provided in an embodiment of the present application.

[0047] Figure 3 This is a flow chart of an embodiment of the present application providing a method of using an intermediate detection area that does not meet the second void quality scoring standard as an area to be detected.

[0048] Figure 4 It is a flow chart of a method provided in an embodiment of the present application for treating an area to be detected that does not meet the stress detection standard as an abnormal area for void detection.

[0049] Figure 5 It is a structural schematic diagram of a box girder cavity detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present application. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should belong to the scope of protection of this application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the present application.

[0051] The following is a brief description of the technical field and related terms of the embodiments of the present application.

[0052] A stress sensor is a mechanical sensor that measures the stress or strain of an object and can convert mechanical stress or strain into an electrical signal output. Box girder stress sensors are usually used to monitor the stress state of bridge structures under load to ensure structural safety and perform health monitoring. Specifically for this application, targeted stress detection is performed on areas to be tested that are suspected of having void quality problems, and the impact of possible voids on the integrity of the box girder structure is evaluated by analyzing stress data.

[0053] Ultrasonic detection technology mainly uses the propagation characteristics of ultrasonic waves in concrete to detect and identify structural defects. The propagation speed of ultrasonic waves in concrete is directly related to the density of concrete. The better the structural density and uniformity of concrete, the less obstruction the ultrasonic waves encounter and the faster the propagation speed. On the contrary, if there are defects such as cavities and cracks in the concrete, the propagation speed of ultrasonic waves will decrease. The reason is that ultrasonic waves will be reflected, scattered and diffracted at the defects of concrete, which will cause the energy of ultrasonic waves to attenuate and change the propagation path. However, in the reinforced concrete structure of the box girder, a steel bar group needs to be set. Especially when the axis of the steel bar is parallel to the test direction, the steel bar affects the propagation of ultrasonic waves and thus affects the accuracy of the concrete sound velocity measurement.

[0054] In the related art, by transmitting and receiving ultrasonic waves from different angles, the direct impact of steel bars on the ultrasonic propagation path can be reduced, thereby improving the accuracy of the detection results. However, this method has many shortcomings in practice. For example, due to structural limitations or the density of steel bars in local areas, it is difficult to perform ultrasonic detection from all ideal angles; the data generated by multi-angle detection requires technicians to have a higher level of technical skills to correctly interpret and analyze, and the cost of equipping high-level technicians is high. The proportion of inaccurate void detection results caused by the above is not high, and the use of more resources is obviously not cost-effective in the process of executing the construction plan.

[0055] The users mentioned in this application refer to the end users of the box girder void detection system, such as engineers, project managers, quality inspectors, etc., who monitor and evaluate the structural integrity of the box girder by using stress sensors and ultrasonic sensors with the help of Internet of Things technology. Users can interact with the box girder void detection system through user devices to obtain the results of box girder void detection, including stress data, void detection scores, abnormal area alarms and other information. Technical personnel refer to professionals who have professional skills and knowledge, can operate and maintain the detection system, and collect, analyze and interpret data. In some cases, technical personnel are also one of the users. The vibration operation team refers to a team composed of construction personnel, who mainly use vibration equipment (such as insert vibrators, etc.) to vibrate the concrete during the concrete pouring process to ensure that the concrete is uniform and dense.

[0056] The present application proposes a box girder void detection system and method based on a stress sensor. The stress sensor is used to perform targeted stress detection on the area to be detected obtained during the execution of the construction plan. The stress sensor provides stable detection results. On the basis of ultrasonic detection, the void detection abnormal area is further screened out from the area to be detected, thereby reducing the error of the detection results provided to the user.

[0057] The following will describe in detail the technical solutions of the embodiments of the present application and how the technical solutions of the embodiments of the present application solve the above-mentioned technical problems in combination with the accompanying drawings and specific implementation methods.

[0058] Method embodiment.

[0059] See also Figure 1 , Figure 1 It is a flow chart of a box girder void detection method based on a stress sensor provided in an embodiment of the present application. Specifically, the box girder void detection method is applied to the box girder void detection system of the system embodiment below, and the box girder void detection system includes a first sensor device, a controller connected to the first sensor, and a wireless network device connected to the controller; the first sensor device includes a plurality of stress sensors, each of which is vertically arranged in the area to be detected on the bottom surface of the box girder (and can be distributed inside the concrete), and the stress sensor can collect the stress data generated by the area to be detected on the bottom surface of the box girder to resist the equivalent load during the static load test. The controller is connected to the user device through the wireless network device. The system may also include a memory, the memory stores a computer program, and the controller is configured to implement any one of the methods described in the method embodiment when executing the computer program.

[0060] The method includes steps S101 to S103.

[0061] S101, acquiring box girder void information, and vertically arranging each of the stress sensors at a plurality of to-be-detected areas on the bottom surface of the box girder according to the box girder void information; the box girder void information is obtained according to a construction plan, the construction plan is a bridge construction plan for indicating on-site construction of cast-in-place prestressed concrete box girders, and the box girder void information includes position range information of each to-be-detected area;

[0062] The box girder void information includes the location range information of each area to be detected, which refers to the specific area determined after the construction of the cast-in-place prestressed concrete box girder that requires further void detection by stress sensing equipment. Each area to be detected can be defined as a rectangle, and the coordinates of the two diagonal vertices of the rectangle and the identification information of the rectangle are provided as the location range information of the area to be detected.

[0063] As an example, the area to be detected includes area 1# to be detected and area 2# to be detected. The identification information of area 1# to be detected is Area_01, the coordinates of the first diagonal vertex are (x1, y1) = (10m, 5m), and the coordinates of the second diagonal vertex are (x2, y2) = (20m, 15m). The identification information of area 2# to be detected is Area_02, the coordinates of the first diagonal vertex are (x1, y1) = (30m, 10m), and the coordinates of the second diagonal vertex are: (x2, y2) = (40m, 20m).

[0064] S102, according to the box girder void information, using a static load test method and using the first sensor device to obtain stress data of each area to be detected, to form a stress detection information set;

[0065] Static load tests are used to detect the stress state of areas with hidden dangers of concrete void diseases (areas to be tested) to obtain stress data. In specific applications, in order to simulate the most unfavorable stress and deformation conditions of the bridge span under the designed automobile load, equivalent loads can be used for simulation. In this simulation, the automobile loading should adopt a lateral inner side offset loading mode. This is because in actual traffic, the driving route of the car on the bridge may not be completely centered, but tends to one side. The lateral inner side offset loading mode can better simulate the actual situation to achieve a more accurate loading effect. At the same time, before conducting a static load test, stress data is obtained using stress sensing equipment as the initial state value (initial stress parameter) without any external load.

[0066] As an example, three stress sensors are arranged in the 1# area to be inspected, marked as Sensor_1 and Sensor_2. Sensor_1 is located in the upper left corner of the area, and Sensor_2 is located in the lower right corner of the area. The stress data of the two are added and averaged, and the obtained value is used as the stress data of the 1# area to be inspected. The average method may conceal local stress concentration or abnormality, but in this embodiment, the same area to be inspected is selected in a targeted manner based on the construction plan and the previous void detection results. The box girder void detection is more like detecting an area that does not meet the standards as a whole from multiple suspicious areas, and the average can effectively identify the area with overall problems. Whether a single area to be inspected can reveal all local details has no effect on the technical solution of the present application. The calculation method of the mean can reduce the complexity of data analysis, improve detection efficiency, and make the detection process faster, so that more areas can be evaluated in a short time.

[0067] S103, detecting each area to be detected according to the stress detection information set, treating the area to be detected that does not meet the hole detection scoring standard as an abnormal hole detection area, generating first alarm information for indicating the location of the abnormal hole detection area and sending it to the user equipment.

[0068] The user device is, for example, a notebook computer, a tablet computer or an industrial computer. The first warning information is, for example, a pop-up window, a voice message or an image message to display the abnormal hollow area.

[0069] Compared with the inaccurate cavity detection results of ultrasonic technology in related technologies, and the low cost-effectiveness of multi-angle detection during construction, this embodiment has the following advantages: by focusing on specific areas where cavities may exist after construction, the problem can be located more accurately, avoiding unnecessary detection of the entire area, thereby saving time and resources; since the detection range is limited to the area determined by the construction plan, that is, the box girder cavity information obtained during the construction plan is utilized, the number of sensors and data processing required for detection can be reduced, and the detection efficiency can be improved; targeted detection can reduce the use of sensors and the complexity of data processing, thereby reducing the overall detection cost; since the detection is concentrated in a specific area, the layout and test parameters of the sensor can be adjusted more finely to obtain more accurate stress data; through the stress sensor, targeted stress detection is performed on the area to be detected obtained in the execution of the construction plan, the stress sensor provides a stable detection result that is not affected by steel bars, and further screens out abnormal cavity detection areas from the area to be detected on the basis of ultrasonic detection, reducing the error of the detection results provided to the user.

[0070] In some embodiments, the construction plan includes:

[0071] According to the preset construction sequence, multiple concrete pump trucks are used to pour concrete in a layered and segmented manner toward both ends; the preset construction sequence includes pouring concrete of the end cross beam, bottom plate, web plate, middle cross beam and end cross beam, roughening and cleaning of the web plate construction joint, and pouring concrete of the top plate and wing plate;

[0072] According to the external environment temperature and the time required for tensioning, geotextile covering and watering are used for concrete curing; and after the formwork is removed, the concrete box girder is covered and cured by watering.

[0073] This embodiment has the following benefits: defining a preset construction sequence on site, the construction sequence starts from the end beam, and the bottom plate, web plate, middle beam and other parts are poured in sequence until the top plate and wing plate, which helps to ensure the quality of concrete pouring and the stability of the structure. According to the requirements of the external ambient temperature and tensioning time, the use of geotextile covering and sprinkling water for maintenance helps to maintain the moisture of the concrete, promote cement hydration reaction, and thus improve the strength and durability of the concrete. After the formwork is removed, the concrete box beam continues to be sprinkled with water and covered for maintenance to ensure that the concrete maintains appropriate humidity conditions during the hardening process. In summary, the construction quality of the concrete box beam is improved through the designed construction sequence, layered and segmented pouring, construction joint treatment and maintenance methods, while taking into account the construction efficiency and environmental impact, which helps to improve the stability and durability of the structure.

[0074] Among them, in the concrete construction of the bottom plate, the poured concrete is tamped by an inserted vibrator, and the thickness of the concrete layered pouring does not exceed 30cm; the concrete of the eight-shaped corners and the web part connected to the bottom plate is tamped by an inserted vibrator; in the concrete construction of the web, the lower mouth of the hopper corresponding to the size of the web is used to pour concrete, and it is vibrated while pouring. The concrete construction of the web is 2cm to 4cm higher than the web, and the layered thickness of the concrete of the web is 28cm to 30cm, and the vibrating rod is vertically inserted into the concrete; in the concrete construction of the top plate, the vibration beam track is welded according to the top surface elevation, and a vibration method with a vibration beam as the main and an inserted vibrator as the auxiliary is adopted during the pouring.

[0075] Use an inserted vibrator to tamp the concrete to ensure that the concrete is dense and free of bubbles. The layered pouring thickness is controlled to no more than 30cm to ensure the uniformity and density of the concrete. For the eight-shaped corners and web parts connected to the bottom plate, the inserted vibrator is also used for tamping to ensure the uniformity of the concrete and the stability of the structure. The lower opening of the hopper corresponding to the size of the web is used for concrete pouring and vibration at the same time to ensure the density of the concrete. The concrete construction is 2cm to 4cm higher than the web, with a layer thickness of 30cm. The vibrating rod is inserted vertically into the concrete to ensure the uniform distribution and density of the concrete. According to the top surface elevation, the vibration beam track is welded, and the vibration beam is used as the main and the inserted vibrator is used as the auxiliary vibration method to achieve more efficient concrete vibration and density.

[0076] See also Figure 2 , Figure 2 It is a schematic diagram of a process for obtaining an area to be detected provided in an embodiment of the present application.

[0077] In some embodiments, the box girder void detection system also includes a second sensor device, which is connected to the controller, and the construction plan also includes pump truck construction information indicating the construction area and construction time of each concrete pump truck; specifically, the second sensor device is an ultrasonic sensor device, and the void detection information acquired by the ultrasonic sensor device includes the number, location, depth and size of the voids.

[0078] Methods for obtaining the area to be detected include:

[0079] S201, according to the pump truck construction information in the construction plan, obtaining a vibration plan and sending it to the user device, the vibration plan including a plurality of vibration guidance information, each of which is used to indicate a vibration operation respectively matched with a construction area of ​​each concrete pump truck;

[0080] As an example, the vibration guidance information is used to indicate the vibration operation that matches the construction area of ​​each concrete pump truck, and the vibration guidance information includes the vibration guidance duration, vibration method, vibration intensity and vibration operation team information. The vibration guidance duration is used to ensure that the concrete is fully vibrated. The vibration method includes the type of vibrator used and the order of vibration. The vibration intensity includes the vibration frequency of the vibrator. The vibration operation team information includes the identification information and historical performance of the team performing the vibration operation. One vibration guidance information can indicate the vibration guidance duration, vibration method, vibration intensity and vibration operation team information corresponding to multiple construction areas of the same vibration operation team, and can cover the operation guidance of the same operation team in multiple construction areas, so as to facilitate the construction manager to uniformly manage and supervise the work of the operation team. It is also possible that one vibration guidance information corresponds to the vibration guidance duration, vibration method, vibration intensity and vibration operation team information corresponding to a single construction area of ​​a vibration operation team.

[0081] S202, after initial setting of the concrete or before final setting of the concrete, obtaining cavity detection information of each construction area through a second sensor device, and combining each cavity detection information and its corresponding vibration guidance information to obtain a cavity information set;

[0082] The second sensor device transmits detection ultrasonic waves to each construction area, and receives reflected sound waves of the detection sound waves, obtains reflected sound wave information, judges the size of the voids in the construction area according to the reflected sound wave information, and uses the obtained number, position, depth and size of the voids as void detection information.

[0083] S203, according to the cavity information set, respectively obtain the cavity quality score of each construction area, and regard the construction area whose cavity quality score does not meet the first cavity quality score standard as an abnormal vibration operation area, generate a second alarm information for indicating the location of the abnormal vibration operation area and send it to the user device; the presentation form of the second alarm information is similar to the first alarm information and will not be repeated here.

[0084] S204, taking the construction area where the void quality score meets the void quality standard as the intermediate detection area, obtaining the intermediate detection score of each intermediate detection area according to the void quality score of each intermediate detection area and the first weight data of each intermediate detection area, taking the intermediate detection area that does not meet the second void quality score standard as the area to be detected, and taking the position range information, void detection information and the corresponding vibration guidance information of the area to be detected as the box girder void information. The requirements of the second void quality score standard are higher than those of the first void quality score standard.

[0085] The construction plan includes pump truck construction information, which is used to reasonably allocate resources to ensure construction efficiency. The corresponding vibration plan is obtained based on the pump truck construction information and sent to the user device. The vibration plan is used to guide each vibration operation team to cooperate with the pump truck to perform vibration operations in a specific construction area to ensure the density of the concrete. After the initial setting or before the final setting of the concrete, the second sensor device is used to detect the voids in each construction area, collect the void information and form a void information set. According to the void information set, the void situation of each construction area is evaluated to determine whether it meets the void quality standard. Areas that do not meet the standards are marked as abnormal vibration operation areas and need to be processed. For construction areas that meet the void quality standards, the void detection results may be inaccurate due to the influence of steel bars and other external factors on ultrasonic detection. It is necessary to further evaluate whether it meets the higher requirements of the second void quality scoring standard. The non-compliant areas are marked as areas to be detected.

[0086] This embodiment has the following benefits: Through accurate pump truck construction information and vibration scheme, the efficiency of concrete pouring and vibration can be improved and manual intervention can be reduced. Cavity detection during the initial or final setting stage of concrete can monitor the quality status of concrete in real time and conduct timely evaluation and remediation.

[0087] Among them, the second sensor device is an ultrasonic detection device, and its specific implementation method has been explained above and will not be repeated here. The second sensor device and the first sensor device are respectively connected to the controller at different detection stages and send sensing data. The controller obtains ultrasonic sensing data and stress data based on the sensing data, performs data processing and quality scoring (decision-making). It can be considered that remote measurement, data collection and analysis, and real-time communication are made possible through the Internet of Things technology. Internet of Things (IoT) technology is a technology that connects physical devices (such as sensors, smart devices, etc.) through a network to realize data collection and management.

[0088] In S203, the step of respectively obtaining the cavity quality score of each construction area according to the cavity information set, and taking the construction area whose cavity quality score does not meet the first cavity quality score standard as the abnormal vibration operation area, including:

[0089] Inputting the void information set into a void quality scoring model to obtain a void quality score for each construction area; the void information set includes void detection information of each construction area and corresponding vibration guidance information;

[0090] When the void quality score of the construction area does not meet the first void quality score standard, the corresponding construction area shall be regarded as an abnormal vibration operation area.

[0091] The first void quality scoring standard is, for example, not less than a first preset score, such as 80, 81, 82, etc. Another example is to sort the void quality scores of all construction areas by size, and regard multiple construction areas with the lowest void quality scores that meet the preset proportion as not meeting the first void quality scoring standard and as abnormal vibration operation areas. The preset proportion is, for example, 20%, 30% or 1 / 3.

[0092] Among them, the risk can be quantified by using the preset proportion method, and priority can be given to the construction areas with the lowest void quality scores; the value of the preset proportion is determined in advance by the user based on experience and statistical principles. The use of the preset proportion method can identify a certain proportion of construction areas with the worst performance, which can better reflect the distribution of the overall construction quality than a single scoring threshold. A single scoring threshold may lead to misjudgment of construction quality, while the use of preset proportions can reduce misjudgments caused by individual outliers or extreme cases.

[0093] The void quality scoring model can be obtained by training a preset deep learning model using a training set. The void quality scoring model is used to predict the void quality score of the construction area based on the void detection information and its corresponding vibration guidance information. The void quality score is used to evaluate the quality of the vibration work of each vibration operation team. A high score indicates good quality and good control of the relative voids. In the training process of the void quality scoring model, a large amount of sample data can be used, each sample data includes the number, location, depth and size of the voids in an area, as well as the corresponding parameters including sample values ​​such as the duration of tamping, vibration mode, vibration intensity and vibration operation team score, and the corresponding void quality score. Therefore, the void quality scoring model integrates multiple features, such as the number, depth, location distribution and size of the voids, as well as the vibration parameters during the construction process, and uses the ability of deep learning to obtain the mapping between the void features and construction features and the quality score from the complex nonlinear relationship, and provides a comprehensive void quality assessment that reflects the number of voids, void depth, location distribution (density) between voids and void size and score in the same area.

[0094] In some embodiments, after generating and sending the second warning information indicating the location of the abnormal area of ​​the vibration operation to the user device, the method further includes:

[0095] After the user instructs the construction personnel to handle the abnormal vibration operation area according to the second alarm information, the second sensor device is used to update the cavity detection information of the abnormal vibration operation area after the handling;

[0096] The abnormal area of ​​the vibration operation after the cavity detection information is updated is used as the intermediate detection area.

[0097] That is, for the voids in the abnormal vibration area, the surrounding concrete is chiseled out according to the coordinates, and the voids are rinsed with high-pressure water and then poured and compacted with mortar of a higher strength grade. The void detection information of the processed area is reacquired, and then the processed area (abnormal vibration area) is used as the intermediate detection area and the previously acquired intermediate detection area is processed in S204.

[0098] See also Figure 3 , Figure 3 This is a flow chart of an embodiment of the present application providing a method of using an intermediate detection area that does not meet the second void quality scoring standard as an area to be detected.

[0099] In some implementations, the intermediate detection area that does not meet the second cavity quality scoring standard is used as the area to be detected, including:

[0100] S301, according to the vibration scheme, the intermediate detection area of ​​each vibration operation team, the vibration time of the intermediate detection area and the corresponding cavity detection information are collected according to the team to obtain a quality information set to be measured;

[0101] S302, acquiring first weight data of each intermediate detection area according to the quality information set to be measured;

[0102] S303, according to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, obtain the intermediate detection score of each intermediate detection area, and according to the intermediate detection score of each intermediate detection area, set the intermediate detection area that does not meet the second void quality score standard as the area to be detected.

[0103] The second void quality scoring standard, for example, is not less than a second preset score, and the second preset score is, for example, 89, 85, 83, 80, etc.; the second void quality scoring standard is also, for example, sorting the intermediate inspection scores of all intermediate inspection areas by size, and treating multiple intermediate inspection areas (construction areas) with the lowest intermediate inspection scores that meet the preset proportions as not meeting the second void quality scoring standard, and as areas to be inspected.

[0104] The technical solution provided in this embodiment collects the construction area, tamping time and corresponding cavity detection information of the same vibration operation team according to the vibration scheme, thereby forming a quality information set to be tested for multiple vibration operation teams. Using the quality information set to be tested, first weight data is obtained for each construction area. Combined with the first weight data and corresponding cavity information of each construction area, it is determined whether each construction area meets the second cavity quality scoring standard.

[0105] This embodiment has the following benefits: By collecting relevant information about the construction area, it is possible to more accurately identify areas that require further inspection, thereby improving the pertinence and efficiency of inspection. The introduction of weighted data provides a quantitative evaluation standard for construction quality, which helps the construction team to promptly discover and resolve potential quality issues. The construction team can respond quickly based on the information provided and conduct timely inspection and remediation of the areas to be inspected.

[0106] In S303, the step of obtaining the intermediate detection score of each intermediate detection area according to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area includes:

[0107] Obtaining an intermediate evaluation correspondence formula, wherein the intermediate evaluation correspondence formula is used to indicate a correspondence between an intermediate detection score, a void quality score, and the first weight data;

[0108] According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate evaluation correspondence formula is used to obtain the intermediate detection score of each intermediate detection area.

[0109] The corresponding relationship formula of the intermediate evaluation is: Sn=an×Gn, Sn is the intermediate detection score of the nth intermediate detection area; αn is the first weight data of the nth intermediate detection area; Gn is the void quality score of the construction area corresponding to the nth intermediate detection area.

[0110] The method for obtaining the first weight data of each intermediate detection area includes:

[0111] Obtain a first weight calculation formula, which conforms to the following formula:

[0112] αn=Cn×Bn

[0113] Cn is the vibration time information parameter of the nth intermediate detection area, the initial value is set to 100%, and it is adjusted according to the absolute value of the difference between the actual duration of vibration and the vibration guidance duration and the ratio of the vibration guidance duration. If the ratio is 0 (the difference between the actual duration and the vibration guidance duration is 0), it is not adjusted. If it increases by 0.01, the vibration time information parameter decreases by 2% until it reaches the minimum value, and the minimum value is, for example, 80%; Bn is the construction risk parameter of the nth intermediate detection area, the initial value is set to 100%, if the risk words or semantics related to construction quality or safety standards appear once in the construction document for the nth intermediate detection area, it is reduced by 0.5% until it reaches the minimum value, and the minimum value is, for example, 85%. n is a positive integer greater than 1.

[0114] In summary, according to the first weight calculation formula, the intermediate evaluation correspondence formula can be regarded as: Sn=cn×Bn×Gn.

[0115] Figure 4 It is a flow chart of a method provided in an embodiment of the present application for treating an area to be detected that does not meet the stress detection standard as an abnormal area for void detection.

[0116] In some embodiments, the detecting each area to be detected according to the stress detection information set and treating the area to be detected that does not meet the void detection scoring standard as a void detection abnormal area includes:

[0117] S401, obtaining a stress detection score for each area to be detected according to the stress detection information set and the initial stress parameters of each area to be detected;

[0118] The stress data of each area to be tested is analyzed, and the stress detection score is obtained based on the change rate compared with the corresponding initial stress parameter. The stress detection score reflects whether the stress level of the area meets the design and safety requirements.

[0119] As an example, according to the stress detection information set and the initial stress parameters of each area to be detected, a method of obtaining a stress detection score of each area to be detected includes:

[0120] Obtaining a detection score relationship table, where the detection score relationship table is used to indicate the corresponding relationship between the change rate and the score; the detection score relationship table may be in the form of a spreadsheet;

[0121] According to the change rate between the stress data of each area to be detected and its corresponding initial stress parameter, the score corresponding to each area to be detected in the detection score relationship table is obtained and used as the stress detection score. The change rate reflects the degree to which the stress changes with the load conditions relative to the initial stress.

[0122] The benefit is that by using the detection score relationship table, the stress detection score is standardized, which improves the consistency and repeatability of the evaluation process. The scoring method is simpler, reducing the dependence on professional technicians and reducing the evaluation cost.

[0123] S402, obtaining the cavity detection score of each area to be detected according to the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected, and treating the construction area whose cavity detection score does not meet the cavity detection score standard as a cavity detection abnormal area.

[0124] In S402, according to the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected, the cavity detection score of each area to be detected is obtained, including:

[0125] The product of the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected is used as the void detection score of each area to be detected. The stress detection score is, for example, 80, 85, 90, 95; another example is A, B, B+, etc. When the stress detection score is in the form of A, B+, B, when obtaining the void detection score, A, B+, and B are assigned a numerical value in turn, for example, A is assigned a value of 95 and B is assigned a value of 85.

[0126] The method for acquiring the second weight data corresponding to each to-be-detected area may include:

[0127] Collecting a plurality of first weighted data of the to-be-detected area corresponding to the same vibrating operation team, and obtaining the standard deviation of the collected plurality of first weighted data as a standard deviation set;

[0128] Obtaining a weight data relationship table, wherein the weight data relationship table is used to indicate a corresponding relationship between a standard deviation of a plurality of first weight data and a value of a second weight data;

[0129] According to the weight data relationship table and the standard deviation set, second weight data corresponding to each area to be detected is obtained.

[0130] The second weight data is used to indicate the uniformity of the distribution of the first weight data of the area to be inspected of the same vibration operation team. Compared with the first weight data, the second weight data focuses more on the consistency evaluation of the operation of the same vibration operation team, reflecting whether the construction performance of the vibration operation team in different areas is balanced and the level of construction quality control. When there is only one first weight data of the area to be inspected corresponding to the same vibration operation team, the second weight data can be the average of the second weight data corresponding to other vibration teams with multiple first weight data.

[0131] As an example, multiple first weight data of the area to be detected corresponding to the 1# vibration operation team and the area to be detected corresponding to the 2# vibration operation team are collected separately, including the first weight data of the 1# vibration operation team (0.93, 0.83, 0.81, 0.84, 0.84, 0.83, 0.85), with a standard deviation of 0.04. The first weight data of the 2# vibration operation team (0.93, 0.75, 0.96, 0.74), with a standard deviation of 0.1. The weight data relationship table indicates that the second weight data within the standard deviation [0.03, 0.05) is 1.12... The second weight data within the standard deviation [0.1, 0.12) is 1.15. Then the second weight data of each area to be detected corresponding to the 1# vibration operation team is 1.12, and the second weight data of each area to be detected corresponding to the 2# vibration operation team is 1.15. In specific applications, users can adjust the weight relationship table according to actual needs so that this method can be applied to different construction sites.

[0132] As an example, a box girder cavity detection method based on a stress sensor is provided, which is used in a box girder cavity detection system. The system includes: a first sensor device, a controller connected to the first sensor, a wireless network device connected to the controller, and a second sensor device connected to the controller; the first sensor device includes a plurality of stress sensors; the controller is connected to a user device through the wireless network device; and the second sensor device is an ultrasonic sensor device. The box girder cavity detection method includes:

[0133] Provide construction plans for bridge construction;

[0134] According to the pump truck construction information in the construction plan, a vibration scheme is obtained and sent to the user device, wherein the vibration scheme includes a plurality of vibration guidance information, each of which is used to indicate a vibration operation that matches a construction area of ​​each concrete pump truck;

[0135] After the initial setting of the concrete or before the final setting of the concrete, the second sensor device is used to obtain the void detection information of each construction area, and each void detection information and its corresponding vibration guidance information are combined to obtain a void information set;

[0136] Inputting the void information set into a void quality scoring model to obtain a void quality score for each construction area;

[0137] When the void quality score of the construction area does not meet the first void quality score standard, the corresponding construction area is regarded as an abnormal vibration operation area; a second alarm information indicating the location of the abnormal vibration operation area is generated and sent to the user device; wherein the first void quality score standard is to sort the void quality scores of all construction areas according to size, and regard multiple construction areas with the lowest void quality scores that meet a preset proportion as abnormal vibration operation areas that do not meet the first void quality score standard;

[0138] The construction area whose void quality score meets the void quality standard is taken as the intermediate detection area, and according to the vibration scheme, the intermediate detection area of ​​each vibration operation team, the vibration time of the intermediate detection area and the corresponding void detection information are collected according to the team to obtain a quality information set to be tested;

[0139] According to the quality information set to be measured, obtaining first weight data of each intermediate detection area;

[0140] Obtaining an intermediate evaluation corresponding relationship formula; the intermediate evaluation corresponding relationship formula is used to indicate the corresponding relationship between the intermediate detection score, the void quality score and the first weight data;

[0141] According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate detection score of each intermediate detection area is obtained by using the intermediate evaluation correspondence formula, and according to the intermediate detection score of each intermediate detection area, the intermediate detection area that does not meet the second void quality score standard is used as the area to be detected;

[0142] The position range information corresponding to the area to be detected, the cavity detection information and the corresponding vibration guidance information are used as the cavity information of the box girder;

[0143] After the construction plan is completed, according to the box girder void information, a static load test method is adopted and the first sensor device is used to obtain stress data of each area to be detected, so as to form a stress detection information set;

[0144] Obtaining a stress detection score for each area to be detected based on the stress detection information set and the initial stress parameters of each area to be detected;

[0145] The product of the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected is used as the stress stability score of each area to be detected; the second weight data is determined according to the quality data of the vibration operation team of the corresponding area to be detected, and the method for obtaining the second weight data corresponding to each area to be detected includes: collecting multiple first weight data of the area to be detected corresponding to the same vibration operation team, and obtaining the standard deviation of the collected multiple first weight data as a standard deviation set; obtaining a weight data relationship table, the weight data relationship table is used to indicate the correspondence between the standard deviation of multiple first weight data and the value of the second weight data; according to the weight data relationship table and the standard deviation set, the second weight data corresponding to each area to be detected is obtained.

[0146] The construction area whose hole detection score does not meet the hole detection score standard is regarded as a hole detection abnormal area, and first alarm information indicating the position of the hole detection abnormal area is generated and sent to the user equipment.

[0147] Among them, the construction plan includes: according to the preset construction sequence, use multiple concrete pump trucks to construct in the designated construction area and construction time, and adopt the pouring method of advancing in layers and sections to both ends to pour concrete; the preset construction sequence includes the concrete pouring of end cross beams, bottom plates, webs, middle cross beams and end cross beams, the roughening and cleaning of the web construction joints, and the concrete pouring of top plates and wing plates; according to the external ambient temperature and the time required for tensioning, the concrete is cured by covering with geotextiles and sprinkling water; and after the formwork is removed, the concrete box beam is covered with water for curing.

[0148] System Embodiments.

[0149] As another specific embodiment of the present application, a box girder void detection system based on a stress sensor is disclosed. Its specific embodiment is consistent with the embodiment recorded in the above method embodiment and the technical effects achieved, and some contents will not be repeated here.

[0150] See also Figure 5 , Figure 5 It is a structural schematic diagram of a box girder cavity detection system provided in an embodiment of the present application.

[0151] The box beam cavity detection system comprises:

[0152] A first sensor device, a controller connected to the first sensor, and a wireless network device connected to the controller;

[0153] The first sensor device includes a plurality of stress sensors; the controller is connected to the user equipment through the wireless network device, and the controller is configured to:

[0154] Acquire box girder void information, and vertically set each of the stress sensors at multiple to-be-detected areas on the bottom surface of the box girder according to the box girder void information; the box girder void information is obtained according to a construction plan, the construction plan is a bridge construction plan for indicating on-site construction of cast-in-place prestressed concrete box girders, and the box girder void information includes position range information of each to-be-detected area;

[0155] According to the box girder void information, a static load test method is adopted and the first sensor device is used to obtain stress data of each area to be detected, so as to form a stress detection information set;

[0156] Each area to be detected is detected according to the stress detection information set, and the area to be detected that does not meet the void detection scoring standard is regarded as a void detection abnormal area, and first alarm information for indicating the location of the void detection abnormal area is generated and sent to the user equipment.

[0157] In some embodiments, the controller detects each area to be detected according to the stress detection information set, and regards the area to be detected that does not meet the void detection scoring standard as a void detection abnormal area in the following manner:

[0158] Obtaining a stress detection score for each area to be detected based on the stress detection information set and the initial stress parameters of each area to be detected;

[0159] According to the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected, the cavity detection score of each area to be detected is obtained, and the construction area whose cavity detection score does not meet the cavity detection score standard is regarded as an abnormal cavity detection area.

[0160] In some embodiments, the controller obtains the stress detection score of each area to be detected according to the stress detection information set and the initial stress parameters of each area to be detected in the following manner:

[0161] Obtaining a detection score relationship table, wherein the detection score relationship table is used to indicate a corresponding relationship between a change rate and a score;

[0162] According to the change rate between the stress data of each area to be detected and its corresponding initial stress parameter, the score corresponding to each area to be detected in the detection score relationship table is obtained and used as the stress detection score.

[0163] In some embodiments, the controller obtains the cavity detection score of each to-be-detected area according to the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area in the following manner:

[0164] The product of the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area is used as the void detection score of each to-be-detected area.

[0165] In some embodiments, the construction plan includes:

[0166] According to the preset construction sequence, multiple concrete pump trucks are used to pour concrete in a layered and segmented manner toward both ends; the preset construction sequence includes pouring concrete of the end cross beam, bottom plate, web plate, middle cross beam and end cross beam, roughening and cleaning of the web plate construction joint, and pouring concrete of the top plate and wing plate;

[0167] According to the external environment temperature and the time required for tensioning, geotextile covering and watering are used for concrete curing; and after the formwork is removed, the concrete box girder is covered and cured by watering.

[0168] In some embodiments, the box girder cavity detection system further includes a second sensor device, which is connected to the controller. The construction plan further includes pump truck construction information indicating the construction area and construction time of each concrete pump truck. The controller obtains the area to be detected in the following manner:

[0169] According to the pump truck construction information in the construction plan, a vibration scheme is obtained and sent to the user device, wherein the vibration scheme includes a plurality of vibration guidance information, each of which is used to indicate a vibration operation that matches a construction area of ​​each concrete pump truck;

[0170] After the initial setting of the concrete or before the final setting of the concrete, the second sensor device is used to obtain the void detection information of each construction area, and each void detection information and its corresponding vibration guidance information are combined to obtain a void information set;

[0171] According to the void information set, respectively obtain the void quality score of each construction area, and regard the construction area whose void quality score does not meet the first void quality score standard as a vibration operation abnormal area, generate second alarm information for indicating the location of the vibration operation abnormal area, and send it to the user device;

[0172] The construction areas whose void quality scores meet the void quality standards are taken as intermediate inspection areas. The intermediate inspection scores of each intermediate inspection area are obtained based on the void quality scores of each intermediate inspection area and the first weight data of each intermediate inspection area. The intermediate inspection areas that do not meet the second void quality score standard are taken as areas to be inspected. The position range information, void detection information and the corresponding vibration guidance information of the areas to be inspected are taken as box girder void information.

[0173] In some embodiments, the controller uses the following method to select the intermediate detection area that does not meet the second cavity quality scoring standard as the area to be detected:

[0174] According to the vibration scheme, the intermediate detection area of ​​each vibration operation team, the vibration time of the intermediate detection area and the corresponding cavity detection information are collected according to the team to obtain a quality information set to be tested;

[0175] According to the quality information set to be measured, obtaining first weight data of each intermediate detection area;

[0176] According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate detection score of each intermediate detection area is obtained, and according to the intermediate detection score of each intermediate detection area, the intermediate detection areas that do not meet the second void quality score standard are used as areas to be inspected.

[0177] In some embodiments, the controller obtains the intermediate detection score of each intermediate detection area according to the first weight data of each intermediate detection area and the cavity quality score of the construction area corresponding to the intermediate detection area in the following manner:

[0178] Obtaining an intermediate evaluation corresponding relationship formula; the intermediate evaluation corresponding relationship formula is used to indicate the corresponding relationship between the intermediate detection score, the void quality score and the first weight data;

[0179] According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate evaluation correspondence formula is used to obtain the intermediate detection score of each intermediate detection area.

[0180] In some embodiments, the controller obtains the cavity quality score of each construction area according to the cavity information set in the following manner, and regards the construction area whose cavity quality score does not meet the first cavity quality score standard as the abnormal vibration operation area:

[0181] Inputting the void information set into a void quality scoring model to obtain a void quality score for each construction area;

[0182] When the void quality score of the construction area does not meet the first void quality score standard, the corresponding construction area shall be regarded as an abnormal vibration operation area;

[0183] Among them, the first void quality scoring standard is to sort the void quality scores of all construction areas according to size, and regard multiple construction areas with the lowest void quality scores that meet the preset proportion as abnormal vibration operation areas that do not meet the first void quality scoring standard.

[0184] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. Any changes or replacements that can be easily thought of by a person of ordinary skill in the art within the technical scope disclosed in the present application should be covered within the scope of protection of the present application.

Claims

1. A box girder cavity detection system based on stress sensor, characterized in that: The box beam cavity detection system comprises: A first sensor device, a controller connected to the first sensor, and a wireless network device connected to the controller; the first sensor device includes a plurality of stress sensors, the controller is connected to a user device through the wireless network device, and the controller is configured as follows: Acquire box girder void information, and vertically set each of the stress sensors at multiple to-be-detected areas on the bottom surface of the box girder according to the box girder void information; the box girder void information is obtained according to a construction plan, the construction plan is a bridge construction plan for indicating on-site construction of cast-in-place prestressed concrete box girders, and the box girder void information includes position range information of each to-be-detected area; According to the box girder void information, a static load test method is adopted and the first sensor device is used to obtain stress data of each area to be detected, so as to form a stress detection information set; Detect each to-be-detected area according to the stress detection information set, regard the to-be-detected area that does not meet the hole detection scoring standard as a hole detection abnormal area, generate first alarm information indicating the location of the hole detection abnormal area, and send the first alarm information to the user equipment; The controller detects each to-be-detected area according to the stress detection information set, and regards the to-be-detected area that does not meet the void detection scoring standard as a void detection abnormal area in the following manner: Obtaining a stress detection score for each area to be detected based on the stress detection information set and the initial stress parameters of each area to be detected; According to the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected, the cavity detection score of each area to be detected is obtained, and the construction area whose cavity detection score does not meet the cavity detection score standard is regarded as a cavity detection abnormal area; The controller obtains the stress detection score of each area to be detected according to the stress detection information set and the initial stress parameters of each area to be detected in the following manner: Obtaining a detection score relationship table, wherein the detection score relationship table is used to indicate a corresponding relationship between a change rate and a score; According to the change rate between the stress data of each area to be detected and its corresponding initial stress parameter, the score corresponding to each area to be detected in the detection score relationship table is obtained and used as the stress detection score; The controller obtains the cavity detection score of each to-be-detected area according to the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area in the following manner: The product of the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area is used as the void detection score of each to-be-detected area; The box girder cavity detection system further includes a second sensor device, which is connected to the controller. The construction plan further includes pump truck construction information for indicating the construction area and construction time of each concrete pump truck. The controller obtains the area to be detected in the following manner: According to the pump truck construction information in the construction plan, a vibration scheme is obtained and sent to the user device, wherein the vibration scheme includes a plurality of vibration guidance information, each of which is used to indicate a vibration operation that matches a construction area of ​​each concrete pump truck; After the initial setting of the concrete or before the final setting of the concrete, the second sensor device is used to obtain the void detection information of each construction area, and each void detection information and its corresponding vibration guidance information are combined to obtain a void information set; According to the void information set, respectively obtain the void quality score of each construction area, and regard the construction area whose void quality score does not meet the first void quality score standard as a vibration operation abnormal area, generate second alarm information for indicating the location of the vibration operation abnormal area, and send it to the user device; The construction areas whose void quality scores meet the void quality standards are taken as intermediate inspection areas. The intermediate inspection scores of each intermediate inspection area are obtained based on the void quality scores of each intermediate inspection area and the first weight data of each intermediate inspection area. The intermediate inspection areas that do not meet the second void quality score standard are taken as areas to be inspected. The position range information, void detection information and the corresponding vibration guidance information of the areas to be inspected are taken as box girder void information.

2. The box girder void detection system based on stress sensor according to claim 1 is characterized in that: The construction plan includes: According to the preset construction sequence, multiple concrete pump trucks are used to pour concrete in a layered and segmented manner toward both ends; the preset construction sequence includes pouring concrete of the end cross beam, bottom plate, web plate, middle cross beam and end cross beam, roughening and cleaning of the web plate construction joint, and pouring concrete of the top plate and wing plate; According to the external environment temperature and the time required for tensioning, geotextile covering and watering are used for concrete curing; and after the formwork is removed, the concrete box girder is covered and cured by watering.

3. The box girder void detection system based on stress sensor according to claim 1 is characterized in that: The controller uses the following method to select the middle detection area that does not meet the second cavity quality scoring standard as the area to be detected: According to the vibration scheme, the intermediate detection area of ​​each vibration operation team, the vibration time of the intermediate detection area and the corresponding cavity detection information are collected according to the team to obtain a quality information set to be tested; According to the quality information set to be measured, obtaining first weight data of each intermediate detection area; According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate detection score of each intermediate detection area is obtained, and according to the intermediate detection score of each intermediate detection area, the intermediate detection areas that do not meet the second void quality score standard are used as areas to be inspected.

4. The box girder cavity detection system based on stress sensor according to claim 3 is characterized in that: The controller obtains the intermediate detection score of each intermediate detection area according to the first weight data of each intermediate detection area and the cavity quality score of the construction area corresponding to the intermediate detection area in the following manner: Obtaining an intermediate evaluation corresponding relationship formula; the intermediate evaluation corresponding relationship formula is used to indicate the corresponding relationship between the intermediate detection score, the void quality score and the first weight data; According to the first weight data of each intermediate detection area and the void quality score of the construction area corresponding to the intermediate detection area, the intermediate evaluation correspondence formula is used to obtain the intermediate detection score of each intermediate detection area.

5. The box girder cavity detection system based on stress sensor according to claim 1 is characterized in that: The controller obtains the cavity quality score of each construction area according to the cavity information set in the following manner, and regards the construction area where the cavity quality score does not meet the first cavity quality score standard as the abnormal vibration operation area: Inputting the void information set into a void quality scoring model to obtain a void quality score for each construction area; When the void quality score of the construction area does not meet the first void quality score standard, the corresponding construction area shall be regarded as an abnormal vibration operation area; Among them, the first void quality scoring standard is to sort the void quality scores of all construction areas according to size, and regard multiple construction areas with the lowest void quality scores that meet the preset proportion as abnormal vibration operation areas that do not meet the first void quality scoring standard.

6. A box girder cavity detection method based on stress sensor, characterized in that: Applied to the box girder void detection system based on stress sensor according to claim 1, the box girder void detection method comprises: Acquire box girder void information, and vertically set each of the stress sensors at multiple to-be-detected areas on the bottom surface of the box girder according to the box girder void information; the box girder void information is obtained according to a construction plan, the construction plan is a bridge construction plan for indicating on-site construction of cast-in-place prestressed concrete box girders, and the box girder void information includes position range information of each to-be-detected area; According to the box girder cavity information, a static load test method is adopted and a first sensor device is used to obtain stress data of each area to be detected, so as to form a stress detection information set; Detect each to-be-detected area according to the stress detection information set, regard the to-be-detected area that does not meet the void detection scoring standard as a void detection abnormal area, generate first alarm information indicating the location of the void detection abnormal area, and send the first alarm information to the user equipment; The detecting each area to be detected according to the stress detection information set and treating the area to be detected that does not meet the void detection scoring standard as a void detection abnormal area includes: Obtaining a stress detection score for each area to be detected based on the stress detection information set and the initial stress parameters of each area to be detected; According to the stress detection score of each area to be detected and the second weight data corresponding to the area to be detected, the cavity detection score of each area to be detected is obtained, and the construction area whose cavity detection score does not meet the cavity detection score standard is regarded as a cavity detection abnormal area; According to the stress detection information set and the initial stress parameters of each area to be detected, a method for obtaining a stress detection score of each area to be detected includes: Obtaining a detection score relationship table, wherein the detection score relationship table is used to indicate a corresponding relationship between a change rate and a score; According to the change rate between the stress data of each area to be detected and its corresponding initial stress parameter, the score corresponding to each area to be detected in the detection score relationship table is obtained and used as the stress detection score; The step of obtaining the cavity detection score of each to-be-detected area according to the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area includes: taking the product of the stress detection score of each to-be-detected area and the second weight data corresponding to the to-be-detected area as the cavity detection score of each to-be-detected area; The box girder cavity detection system further includes a second sensor device, which is connected to the controller. The construction plan further includes pump truck construction information for indicating the construction area and construction time of each concrete pump truck. The controller obtains the area to be detected in the following manner: According to the pump truck construction information in the construction plan, a vibration scheme is obtained and sent to the user device, wherein the vibration scheme includes a plurality of vibration guidance information, each of which is used to indicate a vibration operation that matches a construction area of ​​each concrete pump truck; After the initial setting of the concrete or before the final setting of the concrete, the second sensor device is used to obtain the void detection information of each construction area, and each void detection information and its corresponding vibration guidance information are combined to obtain a void information set; According to the void information set, respectively obtain the void quality score of each construction area, and regard the construction area whose void quality score does not meet the first void quality score standard as a vibration operation abnormal area, generate second alarm information for indicating the location of the vibration operation abnormal area, and send it to the user device; The construction areas whose void quality scores meet the void quality standards are taken as intermediate inspection areas. The intermediate inspection scores of each intermediate inspection area are obtained based on the void quality scores of each intermediate inspection area and the first weight data of each intermediate inspection area. The intermediate inspection areas that do not meet the second void quality score standard are taken as areas to be inspected. The position range information, void detection information and the corresponding vibration guidance information of the areas to be inspected are taken as box girder void information.

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