Steel box girder monitoring system

Abstract

The utility model relates to a steel box girder monitoring system, which belongs to the technical field of civil engineering and comprises a flatness monitoring module, a temporary buttress deformation monitoring module, a walking machine synchronism monitoring module, a stress monitoring module, a temperature monitoring module, a central axis position monitoring module, an information processing module and an alarm module. The monitoring modules are respectively used for monitoring the flatness of the top surface of a steel box girder, the deformation of a temporary buttress, the synchronism of a plurality of walking machines during movement, the section stress of a main beam of the steel box girder, the environment temperature and the axis positions of main beams of two adjacent steel box girders, the information processing module is in communication connection with each monitoring module, and the alarm module is in communication connection with the information processing module. The steel box girder monitoring system provided by the utility model has the advantages that the monitoring parameters are more, the monitoring is more comprehensive, the incremental launching construction precision of the steel box girder is high, the alarm module can remind a worker of abnormal conditions in time, and the time for finding and processing the abnormal conditions is short.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of civil engineering, in particular to a steel box girder monitoring system. BACKGROUND

[0002] Steel box girder incremental launching construction technology has been widely applied to civil engineering of highways, railways, bridges and various complex working conditions. In the process of steel box girder incremental launching construction, the deformation of the cross section of the steel box girder changes repeatedly, which makes it difficult to ensure the accuracy of the steel box girder incremental launching construction. Therefore, in order to ensure the accuracy of the steel box girder incremental launching construction, ensure that the deformation of the main body of the project during the incremental launching construction process is always within a safe range, and the linear shape of the main body of the project meets the design requirements, it is usually necessary to monitor the steel box girder incremental launching construction process. However, there are many factors affecting the accuracy of the steel box girder incremental launching, and the existing steel box girder monitoring system has fewer monitoring parameters, which leads to incomplete monitoring of the steel box girder incremental launching construction. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a steel box girder monitoring system to solve the technical problem of incomplete monitoring of the steel box girder monitoring system on the incremental launching construction in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides a steel box girder monitoring system, the steel box girder is incrementally launched by a walking machine arranged on a temporary support pier, and the steel box girder monitoring system comprises:

[0005] a flatness monitoring module for monitoring the flatness of the top surface of the steel box girder;

[0006] a temporary support pier deformation monitoring module for monitoring the deformation of the temporary support pier;

[0007] a walking machine synchronicity monitoring module for monitoring the synchronicity of the movement of the plurality of walking machines;

[0008] a stress monitoring module for monitoring the cross-sectional stress of the main girder of the steel box girder;

[0009] a temperature monitoring module for monitoring the ambient temperature;

[0010] a central axis position monitoring module for monitoring the axis position of the main girder of the adjacent two steel box girders;

[0011] an information processing module, which is respectively communicatively connected to the flatness monitoring module, the temporary support pier deformation monitoring module, the walking machine synchronicity monitoring module, the stress monitoring module, the temperature monitoring module and the central axis position monitoring module, and is used for collecting monitoring information and judging whether the monitoring information is normal; and

[0012] an alarm module, which is communicatively connected to the information processing module, and alarms when the information processing module judges that the monitoring information is not normal.

[0013] Optionally, the flatness monitoring module, the temporary support pier deformation monitoring module, the walking machine synchronization monitoring module, the stress monitoring module, the temperature monitoring module and the central axis position monitoring module all adopt fiber grating sensors.

[0014] Optionally, the monitoring frequency of the steel box girder monitoring system is 3 times / day to 5 times / day.

[0015] Optionally, the monitoring frequency of the steel box girder monitoring system is 3 times / day, and the time periods of the 3 monitoring of the steel box girder monitoring system are 8:00-10:00, 13:00-15:00 and 19:00-21:00 respectively.

[0016] Optionally, the steel box girder is sequentially spliced by a first side section, a middle section and a second side section, and a plurality of monitoring points are arranged at the connection between the first side section and the middle section and the connection between the middle section and the second side section.

[0017] Optionally, the steel box girder is provided with a multi-layer structure, and each layer of the structure is provided with a monitoring point.

[0018] Optionally, the flatness monitoring module, the temporary support pier deformation monitoring module, the walking machine synchronization monitoring module, the stress monitoring module, the temperature monitoring module and the central axis position monitoring module all adopt wireless communication connection with the information processing module.

[0019] Optionally, the information processing module and the alarm module adopt wireless communication connection.

[0020] Optionally, the alarm module includes a buzzer and an alarm lamp at the construction site.

[0021] Optionally, the alarm module further includes a mobile terminal and a computer at the control center, and the alarm mode of the alarm module includes pop-up window, software prompt, telephone and short message.

[0022] The steel box girder monitoring system provided by the application has the beneficial effects that, compared with the prior art, the steel box girder monitoring system comprises a flatness monitoring module, a temporary support pier deformation monitoring module, a step machine synchronism monitoring module, a stress monitoring module, a temperature monitoring module, a central axis position monitoring module, an information processing module and an alarm module, can monitor the flatness of the top surface of the steel box girder, the deformation of the temporary support pier, the synchronism of the movement of the plurality of step machines, the cross-section stress of the main girder of the steel box girder, the ambient temperature and the axis position of the main girders of the adjacent two steel box girders and a plurality of other parameters in the incremental launching construction process of the steel box girder, comprehensively monitors the incremental launching construction process of the steel box girder and improves the incremental launching construction precision of the steel box girder; meanwhile, the information processing module can collect the monitoring information of the monitoring modules and judge whether the monitoring information is normal, once it is judged that the monitoring information is not normal, the alarm module is controlled to alarm in time, the staff is reminded in time that an abnormal condition occurs, the time for discovering and processing the abnormality is reduced, and the construction precision and the construction safety of the incremental launching construction are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Fig. 1 The module structure schematic diagram of the steel box girder monitoring system provided by the embodiments of the application is shown in the figure.

[0025] Fig. 2 The front view structure schematic diagram of the steel box girder provided by the embodiments of the application is shown in the figure.

[0026] Explanation of reference signs:

[0027] 1, flatness monitoring module; 2, temporary support pier deformation monitoring module; 3, step machine synchronism monitoring module; 4, stress monitoring module; 5, temperature monitoring module; 6, central axis position monitoring module; 7, information processing module; 8, alarm module.

[0028] 100, steel box girder monitoring system; 200, steel box girder; 201, first side section; 202, middle section; 203, second side section; 204, monitoring point. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more clear and understandable, the detailed description of the embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different ways from what is described herein, and with many different combinations of elements, and the present application is not limited to the embodiments described below, and can be practiced with modifications and alterations within the scope of the present application, which are apparent to those skilled in the art.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0031] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] It is to be understood that when an element as a preamble is referred to as being "on" or "connected" to another element, it can be directly on or connected to the other element or intervening elements can also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like as can be used herein, merely describe

[0035] The embodiment of the present application provides a steel box girder monitoring system, please refer to Figs. 1-2 The steel box girder monitoring system 100 comprises a flatness monitoring module 1, a temporary support deformation monitoring module 2, a walking machine synchronization monitoring module 3, a stress monitoring module 4, a temperature monitoring module 5, a central axis position monitoring module 6, an information processing module 7 and an alarm module 8. The flatness monitoring module 1 is used for monitoring the flatness of the top surface of the steel box girder 200. The temporary support deformation monitoring module 2 is used for monitoring the deformation of the temporary support. The walking machine synchronization monitoring module 3 is used for monitoring the synchronization when the plurality of walking machines move. The stress monitoring module 4 is used for monitoring the cross-section stress of the main beam of the steel box girder 200. The temperature monitoring module 5 is used for monitoring the environmental temperature. The central axis position monitoring module 6 is used for monitoring the axis position of the main beam of the adjacent two steel box girders 200. The information processing module 7 is respectively connected to the flatness monitoring module 1, the temporary support deformation monitoring module 2, the walking machine synchronization monitoring module 3, the stress monitoring module 4, the temperature monitoring module 5 and the central axis position monitoring module 6 in communication. The information processing module 7 is used for collecting monitoring information and judging whether the monitoring information is normal. The alarm module 8 is connected to the information processing module 7 in communication. When the information processing module 7 judges that the monitoring information is not normal, the alarm module 8 alarms.

[0036] In the embodiments of the present application, the steel box girder monitoring system 100 comprises a flatness monitoring module 1, a temporary support pier deformation monitoring module 2, a step machine synchronism monitoring module 3, a stress monitoring module 4, a temperature monitoring module 5, a central axis position monitoring module 6, an information processing module 7 and an alarm module 8, which can monitor the flatness of the top surface of the steel box girder 200, the deformation of the temporary support pier, the synchronism of the movement of the plurality of step machines, the cross-sectional stress of the main girder of the steel box girder 200, the ambient temperature and the axis position of the main girder of the adjacent two steel box girders 200 and other numerous parameters during the incremental launching construction process of the steel box girder 200, comprehensively monitors the incremental launching construction process of the steel box girder 200 and improves the incremental launching construction precision of the steel box girder 200. Meanwhile, the information processing module 7 can collect the monitoring information of each monitoring module and determine whether the monitoring information is normal. Once it is determined that the monitoring information is not normal, the alarm module 8 will be controlled to alarm in time, the staff is reminded in time that an abnormal condition occurs, the time for discovering and processing the abnormality is reduced, and the construction precision and construction safety of the incremental launching construction are ensured.

[0037] Specifically, for the flatness monitoring module 1, the flatness monitoring module 1 usually monitors the flatness of the assembly jig frame of the steel box girder 200. The flatness and rigidity of the assembly jig frame are the key to ensure the assembly precision of the girder body. Once the assembly jig frame is deformed or sunken, the flatness of the beam bottom and the beam height may be deviated, so that the incremental launching is difficult, and the girder body may have a large additional internal force during the incremental launching. Therefore, the deformation and the top flatness must be monitored. Usually, long-term monitoring points are arranged on the assembly jig frame for monitoring at any time. Once the deviation occurs, the assembly must be stopped immediately and the problem must be processed.

[0038] Specifically, for the temporary support pier deformation monitoring module 2, the temporary pier is arranged to reduce the incremental launching length and thus reduce the beam cross-sectional bending moment. Although a certain safety factor is considered in the design, other unpredictable deformations caused by the complexity of the incremental launching process cannot be eliminated. If the deformation of a certain temporary support pier exceeds the design range, a large internal force will be generated in the steel beam, which is not conducive to the safety of the beam. Therefore, the deformation of the temporary support pier is monitored in real time during the incremental launching process. An operation platform is arranged above the temporary support pier during the incremental launching. The deformation and displacement of the temporary support pier can be monitored in real time on the platform during the incremental launching.

[0039] Specifically, for the walking machine synchronization monitoring module 3, this time the pushing adopts multi-point walking type pushing, and if the walking machines are not synchronized in horizontal pushing, the steel beam will be deviated or rotated in the horizontal direction during pushing, although it can be adjusted by rectification, but it is very time-consuming. Therefore, the synchronization of all walking machines must be ensured. First, the trial pushing is carried out before the pushing starts, and the detailed data of each walking machine pushing is collected during the trial pushing to adjust the synchronization of the walking machines. Second, the displacement and pressure sensors need to be installed on the walking machines to observe the consistency of the reaction force and the pushing distance of each walking machine in real time during pushing. In this way, the synchronization of the pushing process is ensured, and the deviation of the steel beam is ensured.

[0040] Specifically, for the stress monitoring module 4, the stress of the main beam section of the pushing steel beam changes constantly with the pushing, and due to the different cantilever lengths and the uneven weight of the steel beam segments, the internal stress of the steel beam changes greatly. Therefore, in order to ensure the safety of the structure during construction, it is necessary to track and monitor it, and generally strain gauges need to be attached inside the steel beam for testing. Once an abnormal situation occurs, construction should be suspended, the cause should be found out and reasonable measures should be taken to ensure smooth pushing.

[0041] Specifically, for the temperature monitoring module 5, when the temporary support pier for pushing adopts steel structure, its sensitivity to temperature is much higher than that of the concrete permanent pier. When the temperature changes, the temporary support pier will produce greater deformation than the permanent pier, which may affect the stress of the main beam, so the temperature of the construction site needs to be monitored in real time to determine whether it has an adverse effect on construction. If there is a significant impact, the pre-pushing time should be adjusted as necessary.

[0042] Specifically, for the center axis position monitoring module 6, during pushing, due to the uneven weight of the steel beam segments, the flatness of the top of the support and other unknown factors, the steel beam may be deviated in the horizontal direction during pushing. If the main beam axis position is deviated, the upper sliding box of the walking machine may be deviated from the top plate area during each pushing, which may cause the steel beam to be deformed due to excessive local stress. Therefore, the observation must be carried out in real time during pushing, and the deviation is found and corrected in time to ensure the correct position of the beam axis.

[0043] Further, for the information processing module 7 to determine whether the monitoring information is normal, the following warning value settings are made. If the horizontal displacement deviation exceeds 30 mm, transverse correction adjustment is required; if the vertical deflection exceeds the span or the cantilever length L / 400, the jacking should be stopped to find the reason; if the stress of the steel guide beam exceeds 180 MPa, the deflection and stress change should be compared to analyze whether the stress meets the theoretical working condition, and observation should be strengthened; if the stress of the temporary support pier deviates from the theoretical value by more than 20%, the support pad height should be adjusted in time to ensure uniform stress of the support pier; temperature has a greater impact on steel beam assembly, and it is recommended to assemble in the same time period (morning or afternoon) with a temperature difference of no more than 10°C.

[0044] Further, a guide beam is also needed in the jacking operation of the steel box girder 200, and the bottom surface of the front end, tail end and middle of the guide beam is also arranged with 2 monitoring points 204, and the monitoring standards of the guide beam are the same as those of the steel box girder 200.

[0045] Further, the monitoring points 204 are arranged on the foundation of the temporary support pier to regularly monitor whether the foundation has settlement. The settlement value of the foundation of the temporary support pier is not allowed to exceed 2 cm, and once it reaches 3 cm, the jacking should be stopped immediately, and the foundation of the temporary support pier should be treated to ensure that the guide beam and the steel box girder 200 are in good stress state.

[0046] In one embodiment, the flatness monitoring module 1, the temporary support pier deformation monitoring module 2, the walking machine synchronization monitoring module 3, the stress monitoring module 4, the temperature monitoring module 5 and the central axis position monitoring module 6 all use fiber grating sensors, which have many advantages such as anti-electromagnetic interference, good electrical insulation performance, corrosion resistance, small size, light weight, geometric shape plasticity, small transmission loss, remote monitoring, large transmission capacity, multi-point distributed measurement, wide measurement range, etc.

[0047] In one embodiment, the monitoring frequency of the steel box girder monitoring system 100 is 3 times / day to 5 times / day.

[0048] Illustratively, the monitoring frequency of the steel box girder monitoring system 100 is 3 times / day, and the time periods of the 3 monitoring of the steel box girder monitoring system 100 are 8:00-10:00, 13:00-15:00 and 19:00-21:00 respectively.

[0049] Further, if night construction is needed, the monitoring is performed again from 23:00 to 1:00 the next day. It can be understood that the monitoring frequency of the steel box girder monitoring system 100 can be appropriately increased or reduced according to the construction needs, but the data of the previous day and the next day should be monitored in the same time period for data comparison and analysis.

[0050] In one embodiment, please refer to Fig. 2The steel box girder 200 is sequentially spliced by a first side section 201, a middle section 202 and a second side section 203, and a plurality of monitoring points 204 are arranged at the connection between the first side section 201 and the middle section 202 and the connection between the middle section 202 and the second side section 203.

[0051] In one embodiment, referring to Fig. 2 The steel box girder 200 is provided with a multi-layer structure, and each layer is provided with a monitoring point 204.

[0052] In one embodiment, the flatness monitoring module 1, the temporary pier deformation monitoring module 2, the walking machine synchronization monitoring module 3, the stress monitoring module 4, the temperature monitoring module 5 and the central axis position monitoring module 6 are all connected with the information processing module 7 through wireless communication, reducing wiring work and making monitoring convenient.

[0053] In one embodiment, the information processing module 7 and the alarm module 8 are connected through wireless communication, reducing wiring work and making monitoring convenient.

[0054] In one embodiment, the alarm module 8 includes a buzzer and an alarm lamp at the construction site, which can timely remind the workers at the construction site and remind the workers at the construction site to handle the abnormality or evacuate the construction site.

[0055] Further, the alarm sound of the buzzer has multiple levels, and the workers at the construction site can determine whether to handle the abnormality or evacuate the construction site according to the level of the alarm sound.

[0056] In one embodiment, the alarm module 8 further includes a mobile terminal and a computer at the control center, and the alarm mode of the alarm module 8 includes a pop-up window, a software prompt, a telephone and a short message.

[0057] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0058] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A steel box girder monitoring system, characterized by, The steel box girder is pushed by a walking machine arranged on a temporary support pier, and the steel box girder monitoring system comprises: a flatness monitoring module for monitoring the flatness of the top surface of the steel box girder; a temporary support pier deformation monitoring module for monitoring the deformation of the temporary support pier; a walking machine synchronism monitoring module for monitoring the synchronism of the movement of a plurality of walking machines; a stress monitoring module for monitoring the cross-section stress of the main girder of the steel box girder; a temperature monitoring module for monitoring the ambient temperature; a central axis position monitoring module for monitoring the axis position of the main girder of two adjacent steel box girders; an information processing module in communication connection with the flatness monitoring module, the temporary support pier deformation monitoring module, the walking machine synchronism monitoring module, the stress monitoring module, the temperature monitoring module and the central axis position monitoring module respectively, the information processing module being used for collecting monitoring information and judging whether the monitoring information is normal; and an alarm module in communication connection with the information processing module, the alarm module alarming when the information processing module judges that the monitoring information is not normal.

2. The steel box girder monitoring system of claim 1, wherein, The flatness monitoring module, the temporary support pier deformation monitoring module, the walking machine synchronism monitoring module, the stress monitoring module, the temperature monitoring module and the central axis position monitoring module all adopt fiber grating sensors.

3. The steel box girder monitoring system of claim 1, wherein, The monitoring frequency of the steel box girder monitoring system is 3 times / day to 5 times / day.

4. The steel box girder monitoring system of claim 3, wherein, The monitoring frequency of the steel box girder monitoring system is 3 times / day, and the time periods of the 3 monitoring of the steel box girder monitoring system are 8:00-10:00, 13:00-15:00 and 19:00-21:00 respectively.

5. The steel box girder monitoring system of claim 1, wherein, The steel box girder is composed of a first side section, a middle section and a second side section which are sequentially spliced, and a plurality of monitoring points are arranged at the connection of the first side section and the middle section and the connection of the middle section and the second side section.

6. The steel box girder monitoring system of claim 5, wherein, The steel box girder is provided with a multi-layer structure, and monitoring points are arranged in each layer.

7. The steel box girder monitoring system of claim 1, wherein, Wireless communication connection is adopted between the flatness monitoring module, the temporary support pier deformation monitoring module, the walking machine synchronism monitoring module, the stress monitoring module, the temperature monitoring module, the central axis position monitoring module and the information processing module.

8. The steel box girder monitoring system of claim 1, wherein, Wireless communication connection is adopted between the information processing module and the alarm module.

9. The steel box girder monitoring system of claim 8, wherein, The alarm module comprises a buzzer and an alarm lamp at the construction site.

10. The steel box girder monitoring system of claim 8, wherein, The alarm module further comprises a mobile terminal and a computer at a control center, and the alarm mode of the alarm module comprises a pop-up window, software prompt, telephone and short message.

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