Device for monitoring line shape of large-tonnage steel box girder after standing

Abstract

The utility model relates to the technical field of large-tonnage steel box girder monitoring, in particular to a device for monitoring the line shape of a large-tonnage steel box girder after standing, which comprises a base extending transversely and a vertical column extending up and down, a plurality of placing positions are arranged on the base, and one, two or more sensors are fixed at the placing positions; the stand column is of an up-down telescopic structure, a longitudinal beam is arranged on the side portion of the stand column, a fixing base is installed on the longitudinal beam, the fixing base is also provided with a plurality of containing positions, the containing positions are also used for containing one or two or more sensors, the fixing base is matched with the base, and the height of the stand column is matched with the height of a steel box beam; the wireless transmission module is in signal connection with all the sensors, the central processing system is in signal connection with the wireless transmission module, and the central processing system is used for analyzing data of all the sensors so as to characterize the line shape of the steel box girder after standing; the technical problem that in the prior art, time and labor are wasted due to the fact that a large number of sensors are arranged is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to big tonnage steel box girder monitoring technical field, concretely relates to a device for monitoring the line shape of big tonnage steel box girder after static. BACKGROUND

[0002] Big tonnage steel box girder can produce deformation after static due to dead weight, temperature change, foundation settlement and other factors. Monitoring its line shape can timely find deformation exceeding the allowable range, early warning structure safety hazard, avoid serious accidents such as structure damage and even collapse caused by excessive deformation. In the bridge construction process, the installation precision of steel box girder has strict requirements on line shape. By monitoring the line shape after static, it can be verified whether the construction meets the design requirements, the construction deviation is found in time and adjusted, the connection between each segment steel box girder is smooth, and the construction quality of the whole bridge structure is ensured. Therefore, the line shape monitoring of big tonnage steel box girder after static has important significance for guaranteeing the safety of bridge structure, construction quality and operation performance.

[0003] There are many means for monitoring the line shape of big tonnage steel box girder after static, such as total station measurement, level measurement and steel ruler distance measurement. The total station measurement has the advantages of high measurement accuracy, which can reach millimeter level, and is suitable for various complex environments, but the measurement speed is relatively slow and the workload is large. The level measurement is simple and easy to operate, and has high accuracy, which can meet the measurement requirements of general engineering, but only elevation information can be obtained, and the line shape change in the horizontal direction cannot be directly measured. The steel ruler distance measurement is simple and intuitive, but the measurement accuracy is greatly affected by the accuracy of the steel ruler itself, the measurement environment (such as temperature, tension, etc.), and is generally used for auxiliary measurement and local size inspection.

[0004] Another kind of means is to realize monitoring by means of sensor. The sensor has the advantages of high accuracy, strong anti-interference ability and distributed measurement, but for big tonnage steel box girder, a large number of sensors need to be arranged at different positions of the steel box girder for monitoring. Arranging and installing sensors one by one will consume a lot of time. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of device for monitoring the line shape of big tonnage steel box girder after static to solve the technical problem of time-consuming and laborious caused by arranging a large number of sensors in the prior art.

[0006] To solve the above problems, the device for monitoring the line shape of big tonnage steel box girder after static provided by the utility model adopts the following technical scheme:

[0007] A kind of device for monitoring the line shape of big tonnage steel box girder after static, including horizontally extending base and up and down extending column, multiple placement sites are arranged on the base, and one, two or more sensors are fixed in the placement site;

[0008] The column is telescopic in up and down directions, the side of the column has a longitudinal beam extending longitudinally, a fixing base extending transversely is installed on the longitudinal beam, the fixing base also has a plurality of the placement positions for placing one, two or more sensors, the fixing base cooperates with the base to arrange the sensors on both sides of the steel box girder, and the height of the column is adapted to the height of the steel box girder;

[0009] The wireless transmission module for connecting the sensors and the central processing system for connecting the wireless transmission module are further included, the central processing system is used for analyzing the data of the sensors to represent the line shape of the steel box girder after being placed.

[0010] The device for monitoring the line shape of the large-tonnage steel box girder after being placed has the advantages that the base and the column are arranged, a plurality of placement positions for placing sensors are provided in the transverse and longitudinal directions, various types of sensors can be arranged in advance, the base and the column can be moved to the side of the large-tonnage steel box girder, the height of the column can be adaptively adjusted according to the height of the steel box girder, and therefore, when the steel box girder is monitored, each sensor can be quickly moved to the position, the time for arranging the sensors by the staff is saved, the construction time is reduced, and the technical problem of time-consuming and labor-consuming caused by arranging a large number of sensors in the prior art is solved.

[0011] Further, the base comprises two L-shaped plates and an iron plate, the vertical edges of the two L-shaped plates are welded to each other, the horizontal edge of one of the L-shaped plates has a plurality of the placement positions, the horizontal edge of the other L-shaped plate is welded to the iron plate, and the column is arranged on the L-shaped plate welded to the iron plate.

[0012] Further, the two L-shaped plates are both angle irons, and the angle iron has the advantages of wide source and easy processing and use.

[0013] Further, the column comprises a plurality of single pipes, the upper end of each single pipe has a threaded hole, the lower end of each single pipe has a stud, and adjacent single pipes are connected through the cooperation of the threaded holes and the studs.

[0014] Further, in each single pipe, the single pipe connected to the L-shaped plate is welded to the L-shaped plate, and a reinforcing rib plate is further welded to the side of the single pipe to improve the stability of the column.

[0015] Further, in each single pipe, a threaded hole is formed in the side of the uppermost single pipe, the longitudinal beam has the same structure as the single pipe, and the longitudinal beam is screwed to the threaded hole in the side of the uppermost single pipe through the stud at the end.

[0016] Further, the number of the longitudinal beams is plural, the plurality of longitudinal beams are connected through the fixing base, the fixing base is a U-shaped guide rail with an opening downward, and the U-shaped guide rail has a plurality of the placement positions.

[0017] Further, the placement position on the base and the placement position on the fixing seat are threaded holes for fixing the sensor.

[0018] Further, the sensor on the base and the fixing seat is a laser displacement sensor.

[0019] Further, it further comprises an optical fiber sensor attached to the steel box girder, and a MEMS sensor and a temperature and humidity sensor arranged around the steel box girder. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present application are shown by way of example, and identical or corresponding components are designated by identical or corresponding reference numerals, in which:

[0021] Figure 1 is a cooperation schematic view of each part of the device for monitoring the linear shape of large-tonnage steel box girders after standing (without showing the base and the column);

[0022] Figure 2 is a front view of the base and the column in the device for monitoring the linear shape of large-tonnage steel box girders after standing provided by the present application;

[0023] Figure 3 is a side view of Figure 2 ;

[0024] Figure 4 is a sectional view of the single pipe in the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, base; 2, column; 3, laser displacement sensor; 4, longitudinal beam; 5, fixing seat; 6, L-shaped plate; 7, iron plate; 8, single pipe; 9, threaded hole; 10, stud; 11, reinforcing rib plate. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and those skilled in the art should know that the embodiments described below are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] The principles and spirits of the present application will be explained in detail below with reference to several representative embodiments of the present application.

[0029] An embodiment of the device for monitoring the alignment of large-tonnage steel box girders after static placement provided by this utility model:

[0030] like Figure 1 As shown, the device for monitoring the alignment of a large-tonnage steel box girder after it has been stationary includes various types of sensors arranged beside the steel box girder, a wireless transmission module connected to the signals of each sensor, and a central processing system connected to the wireless transmission module. The central processing system is used to analyze the data from each sensor and thus characterize the alignment of the steel box girder after it has been stationary.

[0031] In the specific arrangement, the laser displacement sensor 3 on the side of the steel box girder is integrated through the vertically extending column 2 and the horizontally extending base 1 to improve the arrangement efficiency and reduce the construction time of the workers. Specifically, the column 2 is a vertically extendable structure, and the side of the column 2 has a longitudinally extending beam 4. The longitudinal beam 4 is equipped with a horizontally extending fixing seat 5. The fixing seat 5 also has multiple placement positions, which are used to place one, two or more sensors. The fixing seat 5 cooperates with the base 1 to realize the arrangement of sensors on both the upper and lower sides of the steel box girder. The height of the column 2 is adapted to the height of the steel box girder.

[0032] like Figure 2 and Figure 3 As shown, the base 1 includes two L-shaped plates 6 and an iron plate 7. The vertical edges of the two L-shaped plates 6 are welded together. One of the L-shaped plates 6 has multiple placement positions on its horizontal edge. The horizontal edge of the other L-shaped plate 6 is welded to the iron plate 7. The column 2 is arranged on the L-shaped plate 6 welded to the iron plate 7.

[0033] In this embodiment, both L-shaped plates 6 are angle iron. Angle iron has the advantages of being widely available and easy to process and use. In other embodiments, the L-shaped plates 6 can also be formed by welding iron plates 7.

[0034] like Figures 2 to 4 As shown, the column 2 includes multiple single tubes 8, each single tube 8 having a threaded hole 9 at its upper end and a stud 10 at its lower end. Adjacent single tubes 8 are connected by engaging the threaded hole 9 and the stud 10. Among the single tubes 8, the single tube 8 connected to the L-shaped plate 6 is welded to the L-shaped plate 6, and a reinforcing rib plate 11 is also welded to the side of the single tube 8 to improve the stability of the column 2.

[0035] In addition, the uppermost single tube 8 has a threaded hole 9 on its side. The structure of the longitudinal beam 4 is the same as that of the single tube 8. The longitudinal beam 4 is screwed into the threaded hole 9 on the side of the uppermost single tube 8 by the stud at its end.

[0036] The number of the longitudinal beams 4 is multiple, and the multiple longitudinal beams 4 are connected through the fixing bases 5, the fixing bases 5 are U-shaped guide rails with openings downward, and the U-shaped guide rails are internally provided with multiple placing positions. Specifically, the connection between the fixing bases 5 and the corresponding longitudinal beams 4 is realized by inserting bolts in the fixing bases 5, and correspondingly, the corresponding threaded holes are formed in the longitudinal beams 4.

[0037] In the embodiment, the placing positions on the base 1 and the placing positions on the fixing bases 5 are threaded holes for fixing the sensors. The number of the fixed sensors and the fixed positions can be selected according to actual needs, and the spacing between the adjacent sensors can be adjusted.

[0038] In addition to the laser displacement sensors 3 on the base 1 and the fixing bases 5, the whole device further comprises fiber-optic sensors attached to the steel box girder, and MEMS sensors and temperature and humidity sensors arranged around the steel box girder.

[0039] The working principle of the device for monitoring the linear shape of the large-tonnage steel box girder after static placement is as follows: the laser displacement sensor 3 measures the distance between the target object surface and the sensor by using a laser beam. The laser sensors are arranged at different positions of the steel box girder to monitor the deformation of the whole girder after static placement in real time and obtain accurate displacement data of each node. These data can be used to generate a deformation curve of the steel box girder to reflect the linear shape change after static placement; the fiber-optic sensors can be distributed along the surface of the steel box girder, and are particularly suitable for detecting local deformation. By deploying multiple sensors, the deformation data of the whole surface of the steel box girder can be obtained to form a continuous strain distribution map; the MEMS sensors are installed at key positions of the steel box girder, such as support points and joint positions, to monitor the micro vibration or dynamic response of the girder in real time. This is very effective for monitoring the possible micro deformation of the girder after static placement, especially in the presence of environmental interference (such as temperature change, wind force, etc.), which can provide real-time response. The temperature and humidity sensors are installed in the surrounding environment of the steel box girder to collect temperature and humidity data in real time, and at the same time, the temperature and humidity data are combined with the deformation data of the steel box girder to eliminate the interference of the environment on the deformation data by establishing a relationship model between temperature and humidity and structural deformation; all the sensors are connected to the central processing system through the wireless transmission module to form a wireless sensor network.

[0040] Through the combination of multiple sensors, high-precision monitoring of the global and local deformation of the steel box girder is realized; real-time data transmission and analysis ensure that problems can be found at the first time; the static linear shape of the steel box girder is intuitively displayed to reflect the deformation condition, which is convenient for construction and management.

Claims

1. A device for monitoring the alignment of a large-tonnage steel box girder after it has been left to stand still, characterized in that: The base is provided with a plurality of placement positions, and one, two or more sensors are fixed on the placement positions; The column is provided with a longitudinal beam, and a fixing seat is mounted on the longitudinal beam, the fixing seat is also provided with a plurality of placement positions for placing one, two or more sensors, and the fixing seat is matched with the base to arrange sensors on both sides of the steel box girder. The base includes two L-shaped plates and an iron plate, the vertical edges of the two L-shaped plates are welded to each other, the horizontal edge of one of the L-shaped plates is provided with a plurality of placement positions, and the horizontal edge of the other L-shaped plate is welded to the iron plate.

2. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 1, characterized in that: The two L-shaped plates are both angle irons.

3. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 2, characterized in that: The column includes a plurality of single pipes, the upper end of each single pipe is provided with a threaded hole, and the lower end is provided with a stud, and adjacent single pipes are connected through the threaded hole and the stud.

4. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 2 or 3, characterized in that: In each single pipe, the single pipe connected to the L-shaped plate is welded to the L-shaped plate, and a reinforcing rib plate is further welded to the side of the single pipe to improve the stability of the column.

5. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 4, characterized in that: In each single pipe, the side of the uppermost single pipe is provided with a threaded hole, the longitudinal beam has the same structure as the single pipe, and the longitudinal beam is screwed to the threaded hole in the side of the uppermost single pipe through the stud at the end.

6. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 4, characterized in that: The number of longitudinal beams is multiple, and the multiple longitudinal beams are connected through the fixing seat.

7. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 6, characterized in that: The placement positions on the base and the fixing seat are both threaded holes for fixing sensors.

8. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to claim 7, characterized in that: The sensors on the base and the fixing seat are both laser displacement sensors.

9. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to any one of claims 1 to 3, characterized in that: The base and the fixing seat are also provided with a fiber sensor attached to the steel box girder, a MEMS sensor arranged around the steel box girder, and a temperature and humidity sensor.

10. The device for monitoring the linear shape of a large-tonnage steel box girder after standing according to any one of claims 1 to 3, characterized in that: ​

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