A bridge deflection detection system

Abstract

The present application relates to the field of bridge detection, especially to a bridge deflection detection system, which comprises a plurality of bridge detection devices and a control wire, the plurality of bridge detection devices are evenly arranged along the length direction of the bridge, the bridge detection device comprises a measuring scale and a measuring slider, the measuring scale is perpendicular to the bridge plane, and the measuring slider is slidable along the length direction of the measuring scale; the two ends of the control wire are fixed on the two ends of the bridge respectively, and the control wire is connected with the plurality of measuring sliders. The connection mode of the control wire is adopted, so that the heavy installation facilities such as the conventional scaffold is avoided; through the cooperation of the measuring scale and the measuring slider, the change of the bridge deflection after the load of the bridge is increased can be quickly and accurately measured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge detection, in particular to a bridge deflection detection system. BACKGROUND

[0002] Under the action of external load such as vehicle, the bridge structure will produce a longitudinal line displacement perpendicular to the axis direction, that is, deflection. Generally speaking, during the design of the bridge, the deformation of the bridge is strictly controlled within the allowable range of deflection specified in the specification, but with the passage of time, the bridge structure will cause excessive deformation of the bridge due to the aging of the concrete material itself and the decline of the bearing capacity of the bridge structure, which will cause the deflection to exceed the allowable range specified in the specification, and at this time, the bridge structure has a major safety hazard. Therefore, as an important index for evaluating the safety of the bridge, the deflection has been widely used in the safety evaluation of the bridge structure. At present, the instruments and equipment used for measuring the deflection of the bridge include the dial gauge, the displacement meter, the level, the total station and the connecting pipe, and the installation of the dial gauge and the displacement meter needs to be completed with the help of the scaffold. For the influence of the water under the bridge, the high pier, the limitation of the highway and railway traffic and the crossing of the valley, the scaffold cannot be erected, so that the dial gauge and the displacement meter cannot be installed. Although the level, the total station and the connecting pipe can be used for non-contact measurement, the measurement is greatly affected by the site topography, the measurement distance and the weather, and all the above methods have the problems of less layout points, high on-site layout cost and inconvenient installation. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a bridge deflection detection system which is simple to install, does not need to erect a scaffold and has low cost.

[0004] In order to solve the above technical problem, the technical scheme adopted by the present application is as follows: a bridge deflection detection system, comprising a plurality of bridge detection devices and a control wire, the plurality of bridge detection devices are uniformly arranged along the length direction of the bridge, the bridge detection device comprises a measuring scale and a measuring slide block, the measuring scale is perpendicular to the bridge plane, and the measuring slide block is slidable along the length direction of the measuring scale; the two ends of the control wire are fixed to the two ends of the bridge respectively, and the control wire is connected with the plurality of measuring slide blocks.

[0005] The present application has the advantages that: the connection form of the control wire is adopted, which avoids the heavy installation facilities such as the conventional scaffold; through the cooperation of the measuring scale and the measuring slide block, the change of the deflection of the bridge after the load is added to the bridge can be quickly and accurately measured. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 It is a structural schematic view of the bridge deflection detection system of the present application.

[0007] Figure 2This is a schematic diagram of the structure of the bridge detection device of the bridge deflection detection system according to a specific embodiment of the present invention.

[0008] Figure 3 This is a schematic diagram of the measuring slider of the bridge detection device in the bridge deflection detection system according to a specific embodiment of the present invention.

[0009] Figure 4 An exploded view of the measuring slider of the bridge detection device in the bridge deflection detection system according to a specific embodiment of the present invention;

[0010] Figure 5 This is a schematic diagram of the fixing device of the bridge detection apparatus of the bridge deflection detection system according to a specific embodiment of the present invention.

[0011] Label Explanation:

[0012] 1. Bridge inspection device; 11. Measuring ruler; 111. Fixing groove;

[0013] 12. Measuring slider; 121. Slider body;

[0014] 122. Fixing strip; 1221. Protrusion; 1222. First locking part;

[0015] 123. Fixing buckle; 1231. Second locking part; 1232. Threading part;

[0016] 124. Fixed adjustment button;

[0017] 13. Fixing device; 131. Suction cup; 132. Suction cup housing; 133. Fixing rod; 134. Suction cup control rod; 135. Fixing base; 136. Suction cup adjustment button;

[0018] 2. Control the iron wire. Detailed Implementation

[0019] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] Please refer to Figures 1 to 5 A bridge deflection detection system includes multiple bridge detection devices 1 and control wires 2. The multiple bridge detection devices 1 are evenly arranged along the length direction of the bridge. Each bridge detection device 1 includes a measuring ruler 11 and a measuring slider 12. The measuring ruler 11 is perpendicular to the bridge plane, and the measuring slider 12 is slidable along the length direction of the measuring ruler 11. The two ends of the control wire 2 are respectively fixed to the two ends of the bridge, and the control wire 2 is connected to the multiple measuring sliders 12.

[0021] Working principle: When in use, bridge detection device 1 is arranged at each measuring point of the bridge. The control wire 2 is used as the measurement reference. The two ends of the control wire 2 are fixed to the bridge surface and connected to the measuring sliders 12 of multiple bridge detection devices. The displacement change of the measuring slider 12 relative to the measuring ruler 11 before and after the load is added to the bridge can be calculated to obtain the deflection value at each measuring point of the bridge.

[0022] As can be seen from the above description, the beneficial effects of the present invention are as follows: by adopting the connection form of the control wire 2, the heavy installation facilities such as conventional scaffolding are avoided; through the cooperation of the measuring ruler 11 and the measuring slider 12, the change of bridge deflection can be measured quickly and accurately after the bridge is subjected to increased load.

[0023] Furthermore, the measuring slider 12 includes a slider body 121, a fixing strip 122, and a fixing buckle 123. The fixing strip 122 is fixedly disposed on the slider body 121, and the fixing buckle 123 engages with the fixing strip 122. A wire threading opening is formed between the fixing buckle 123 and the fixing strip 122, and the control wire 2 passes through the wire threading opening.

[0024] As described above, the connection between the fixing strip 122 and the fixing buckle 123 allows for quick assembly to form a wire threading port, providing convenience for the installation of the equipment.

[0025] Furthermore, the fixing strip 122 includes a protrusion 1221 and a first engaging portion 1222. The protrusion 1221 protrudes from the slider body 121, and the end of the protrusion 1221 away from the slider body 121 is provided with an extended first engaging portion 1222. The extending direction of the engaging portion is perpendicular to the protruding direction of the protrusion 1221. The fixing buckle 123 includes a second engaging portion 1231, and the second engaging portion 1231 is provided with a slot, which matches the first engaging portion 1222.

[0026] As can be seen from the above description, the fast snap-fit ​​of the fixing strip 122 and the fixing buckle 123 is achieved by the cooperation of the first snap-fit ​​part 1222 and the second snap-fit ​​part 1231 with the slot.

[0027] Furthermore, the fixing buckle 123 also includes a threading part 1232, which is opposite to the side of the protrusion 1221 away from the first snap-fit ​​part 1222, and a threading opening is formed between the threading part 1232 and the protrusion 1221.

[0028] As described above, one side of the fixing buckle 123 engages with the fixing strip 122, while the other side forms a threading opening with the fixing strip 122 through the gap between the threading part 1232 and the protrusion 1221. The side of the protrusion 1221 with the first engaging part 1222 is the right side, and the side of the protrusion 1221 opposite to the threading part 1232 is the left side. The engagement of the first engaging part 1222 and the second engaging part 1231 on the right side of the protrusion 1221 forms a leftward and upward limiting structure. This ensures that when the threading opening is located on the left side of the protrusion 1221, even if the wire 2 is pulled to the left or upward, the connection between the fixing buckle 123 and the fixing strip 122 cannot be released, thus ensuring the normal use of the device.

[0029] Furthermore, the threading portion 1232 and the second snap-fit ​​portion 1231 are two opposing L-shaped structures, and the threading portion 1232 and the second snap-fit ​​portion 1231 respectively abut against the two sides of the protrusion 1221 to clamp the protrusion 1221.

[0030] As can be seen from the above description, the protrusion 1221 is clamped by the threading part 1232 and the second snap-fit ​​part 1231, which further enhances the reliability of the connection between the fixing buckle 123 and the fixing strip 122.

[0031] Furthermore, the measuring slider 12 also includes a fixed adjustment button 124. The side of the slider body 121 is provided with a fixing hole, which connects the side of the slider body 121 with the side of the measuring ruler 11. The fixed adjustment button 124 is movably disposed in the fixing hole.

[0032] As described above, by pushing the fixed adjustment button 124, the fixed adjustment button 124 is pressed against the side of the measuring ruler 11, so that the slider body 121 can be fixed on the measuring ruler 11. The bridge detection device 1 after the slider body 121 is fixed serves as the detection endpoint when detecting bridge deflection. Since the height of the slider body 121 at the detection endpoint is used as the reference height of the control wire 2, the slider body 121 needs to be fixed and not move.

[0033] Furthermore, the side of the measuring ruler 11 is provided with a fixing groove 111 along the length direction of the measuring ruler 11, and the fixing groove 111 is opposite to the fixing hole.

[0034] As can be seen from the above description, by setting the fixing groove 111, when the fixing adjustment button 124 is pushed into the fixing groove 111, the end of the fixing adjustment button 124 not only presses against the bottom of the fixing groove 111, but also abuts against the groove wall of the fixing groove 111, ensuring the fixing effect of the fixing adjustment button 124.

[0035] Furthermore, the bridge inspection device 1 also includes a fixing device 13, on which the measuring ruler 11 is fixedly mounted. The fixing device 13 includes a suction cup 131, a suction cup housing 132, a fixing rod 133, and a suction cup control rod 134. The fixing rod 133 is hollow, and the lower end of the fixing rod 133 is connected to the suction cup housing 132. The suction cup control rod 134 is movably disposed inside the fixing rod 133, and the lower end of the suction cup control rod 134 is connected to the suction cup 131. The outer diameter of the suction cup housing 132 is smaller than the outer diameter of the suction cup 131.

[0036] As described above, by setting up the suction cup housing 132 and the suction cup 131, after the suction cup 131 is pressed against the bridge plane, the suction cup control rod 134 is moved to make the middle of the suction cup 131 bulge upward, with the suction cup housing 132 as a limit. This can increase the pressure difference between the inside and outside of the suction cup 131, ensuring the stable setting of the bridge detection device 1.

[0037] Furthermore, the fixing device 13 also includes a fixing base 135 and a suction cup adjustment button 136. The fixing rod 133 is fixed on the fixing base 135, one end of the suction cup control rod 134 protrudes from the fixing base 135, and the suction cup adjustment button 136 is provided on the end of the suction cup control rod 134 protruding from the fixing base 135.

[0038] As described above, the mounting base 135 serves as the mounting base for the suction cup 131, suction cup housing 132, fixing rod 133, and suction cup control rod 134. The suction cup adjustment button 136 on the suction cup control rod 134 serves as the handle for pulling the suction cup control rod 134, making it convenient for personnel to operate.

[0039] Reference Figures 1 to 5 Embodiment 1 of the present invention is as follows:

[0040] The application scenario of this invention is as follows: When conducting deflection testing on bridges, traditional testing equipment usually needs to be installed on scaffolding, that is, scaffolding needs to be erected on the bridge in advance to carry out the testing. The scaffolding erection is cumbersome and not conducive to the rapid development of the testing work.

[0041] like Figures 1 to 5 As shown, a bridge deflection detection system according to this embodiment includes multiple bridge detection devices 1 and control wires 2. The multiple bridge detection devices 1 are evenly arranged along the length direction of the bridge. Each bridge detection device 1 includes a measuring ruler 11 and a measuring slider 12. The measuring ruler 11 is perpendicular to the bridge plane, and the measuring slider 12 is slidable along the length direction of the measuring ruler 11. The two ends of the control wire 2 are respectively fixed to the two ends of the bridge, and the control wire 2 is connected to the multiple measuring sliders 12.

[0042] like Figure 2 , Figure 3and Figure 4 As shown, the measuring slider 12 includes a slider body 121, a fixing strip 122 and a fixing buckle 123. The fixing strip 122 is fixedly mounted on the slider body 121. The fixing buckle 123 engages with the fixing strip 122. A wire threading opening is formed between the fixing buckle 123 and the fixing strip 122, and the control wire 2 passes through the wire threading opening.

[0043] like Figure 3 and Figure 4 As shown, the fixing clip 122 includes a protrusion 1221 and a first engaging portion 1222. The protrusion 1221 protrudes from the slider body 121. The end of the protrusion 1221 away from the slider body 121 is provided with an extended first engaging portion 1222. The extending direction of the engaging portion is opposite to the protruding direction of the protrusion 1221. The fixing buckle 123 includes a second engaging portion 1231. The second engaging portion 1231 is provided with a slot, which matches the first engaging portion 1222.

[0044] like Figure 3 and Figure 4 As shown, the fixing buckle 123 also includes a threading part 1232, which is opposite to the side of the protrusion 1221 away from the first snap-fit ​​part 1222, and a threading opening is formed between the threading part 1232 and the protrusion 1221.

[0045] like Figure 3 and Figure 4 As shown, the threading part 1232 and the second snap-fit ​​part 1231 are two opposing L-shaped structures. The threading part 1232 and the second snap-fit ​​part 1231 respectively abut against the two sides of the protrusion 1221 to clamp the protrusion 1221.

[0046] like Figure 3 and Figure 4 As shown, the measuring slider 12 also includes a fixed adjustment button 124. The side of the slider body 121 is provided with a fixing hole, which connects the side of the slider body 121 with the side of the measuring ruler 11. The fixed adjustment button 124 is movably disposed in the fixing hole.

[0047] like Figure 2 As shown, the side of the measuring ruler 11 is provided with a fixing groove 111 along the length direction of the measuring ruler 11, and the fixing groove 111 is opposite to the fixing hole.

[0048] like Figure 2 and Figure 5As shown, the bridge inspection device 1 also includes a fixing device 13. The measuring ruler 11 is fixedly mounted on the fixing device 13. The fixing device 13 includes a suction cup 131, a suction cup housing 132, a fixing rod 133, and a suction cup control rod 134. The fixing rod 133 is hollow, and the lower end of the fixing rod 133 is connected to the suction cup housing 132. The suction cup control rod 134 is movably disposed inside the fixing rod 133, and the lower end of the suction cup control rod 134 is connected to the suction cup 131. The outer diameter of the suction cup housing 132 is smaller than the outer diameter of the suction cup 131.

[0049] The fixing device 13 also includes a fixing base 135 and a suction cup adjustment button 136. The fixing rod 133 is fixed on the fixing base 135, one end of the fixing rod 133 protrudes from the fixing base 135, and the suction cup adjustment button 136 is provided on the end of the fixing rod 133 protruding from the fixing base 135.

[0050] The working principle of this invention is as follows: First, according to the bridge design drawings, the locations of the bridge bearings, 1 / 4, 1 / 8 points and the mid-span are identified as measuring points; then, the bridge deflection detection device is placed at each measuring point. By pressing the suction cup adjustment button 136, the suction cup control rod 134 is pulled to expel the air from the suction cup 131, so that the suction cup 131 is adsorbed onto the bridge surface, thus completing the installation of the bridge deflection detection device.

[0051] Then, at two bridge supports (both ends of the bridge), select an initial height and push the fixing adjustment button 124 of the bridge deflection detection device at that location into the fixing groove 111 on the side of the measuring ruler 11 to lock the measuring slider 12; while the fixing adjustment buttons 124 of the remaining bridge deflection detection devices are in the pushed-out state, and the measuring slider 12 moves freely; then release the fixing buckles 123 on the measuring sliders 12 of the remaining bridge deflection detection devices from the fixing clips 122.

[0052] Then, the wiring steps for the control wire 2 begin. Both ends of the control wire 2 are fixed to both ends of the bridge. The control wire 2 is then passed sequentially through the threading portion 1232 of the bridge deflection detection device on the bridge. Specifically, the control wire 2 is first positioned to the left of the protrusion 1221 of the fixing clip 122. Then, the first engaging portion 1222 of the fixing clip 123 is engaged with the second engaging portion 1231 of the fixing clip 122. After engagement, the threading portion 1232 of the fixing clip 123 faces the left side of the protrusion 1221, and the control wire 2 is positioned within the threading opening formed between the threading portion 1232 and the protrusion 1221, thus completing the connection between the control wire 2 and each bridge deflection detection device. If the bridge to be tested is long, the control wire 2 can be arranged in sections and connected using sleeve connectors.

[0053] After the bridge deflection detection system is installed, the scale position on the measuring ruler 11 corresponding to the measuring slider 12 of each bridge deflection detection device is read, which is used as the initial reading at each measuring point.

[0054] Then, the bridge is loaded with vehicles, and the scale position on the measuring ruler 11 corresponding to the measuring slider 12 at each measuring point is read after loading, which is used as the deformation reading at each measuring point.

[0055] The difference between the calculated deformation reading and the initial reading is the deflection value at each measuring point on the bridge. By applying loads according to different required working conditions and repeating the above steps, the deflection values ​​at each measuring point on the bridge under multiple loading conditions can be obtained.

[0056] In summary, the bridge deflection detection system provided by this invention adopts a control wire connection method, avoiding the use of conventional scaffolding and other cumbersome installation facilities; through the cooperation of measuring ruler and measuring slider, the change of bridge deflection can be measured quickly and accurately after the bridge is subjected to increased load.

[0057] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A bridge deflection detection system, characterized in that, The system includes multiple bridge detection devices and a control wire. The bridge detection devices are evenly arranged along the length of the bridge. Each detection device includes a measuring ruler and a measuring slider. The measuring ruler is perpendicular to the bridge plane, and the measuring slider is slidable along the length of the measuring ruler. The control wire is fixed at both ends of the bridge and connects to the multiple measuring sliders. The measuring sliders near the ends of the bridge are fixed to the measuring ruler. By applying vehicle load to the bridge, the corresponding bridge detection devices undergo displacement and deformation. The deflection of the bridge measurement points is obtained by observing the changes in the measuring sliders of the bridge detection devices on the measuring ruler before and after the load. The measuring slider includes a slider body, a fixing strip, and a fixing buckle. The fixing strip is fixedly mounted on the slider body, and the fixing buckle engages with the fixing strip, forming a wire-passing opening between them. The control wire passes through this opening. The fixing strip includes a protruding portion and a first engaging portion. The protruding portion protrudes from the slider body, and an extending first engaging portion is provided at the end of the protruding portion away from the slider body. The extending direction of the first engaging portion is perpendicular to the protruding direction of the protruding portion. The fixing buckle includes a second engaging portion with a slot. The slot matches the first latching part, and the fixing buckle also includes a threading part. The threading part is opposite to the side of the protrusion away from the first latching part, and a threading opening is formed between the threading part and the protrusion. The threading part and the second latching part are two opposing L-shaped structures. The threading part and the second latching part respectively abut against the two sides of the protrusion to clamp the protrusion. The measuring slider also includes a fixing adjustment button. The side of the slider body is provided with a fixing hole. The fixing hole connects the side of the slider body and the side of the measuring ruler. The fixing adjustment button is movably disposed in the fixing hole. The bridge inspection device also includes a fixing device. The measuring ruler is fixedly mounted on the fixing device. The fixing device includes a suction cup, a suction cup housing, a fixing rod, and a suction cup control rod. The fixing rod is hollow, and the lower end of the fixing rod is connected to the suction cup housing. The suction cup control rod is movably mounted inside the fixing rod, and the lower end of the suction cup control rod is connected to the suction cup. The outer diameter of the suction cup housing is smaller than the outer diameter of the suction cup. The measuring ruler has a fixing groove on its side along the length of the measuring ruler, and the fixing groove is opposite to the fixing hole; At both ends of the bridge, select an initial height and push the fixing adjustment button of the bridge inspection device at that location into the fixing groove on the side of the measuring ruler to lock the measuring slider. The fixing adjustment buttons of the other bridge inspection devices are in the extended state, allowing the measuring sliders to move freely. Then, release the fixing clips on the measuring sliders of the other bridge inspection devices from their engagement with the fixing strips. First, place the control wire on the left side of the protrusion of the fixing strip. Then, engage the first engaging part of the fixing strip with the second engaging part of the fixing clip. After engagement, the wire threading part of the fixing clip is opposite the left side of the protrusion, and the control wire is positioned precisely at... Within the threading opening formed between the threading part and the protrusion, the control wire is connected to each bridge detection device. The control wire is arranged in sections and connected by sleeve connectors. After the bridge deflection detection system is installed, the scale position on the measuring ruler corresponding to the measuring slider of each bridge detection device is read. This is used as the initial reading at each measuring point. Then, the bridge is loaded with vehicles, and the scale position on the measuring ruler corresponding to the measuring slider at each measuring point after loading is read again. This is used as the deformation reading at each measuring point. The difference between the deformation reading and the initial reading is calculated, which is the deflection value at each measuring point of the bridge.

2. The bridge deflection detection system according to claim 1, characterized in that, The fixing device also includes a fixing base and a suction cup adjustment button. The fixing rod is fixed to the fixing base, one end of the suction cup control rod protrudes from the fixing base, and a suction cup adjustment button is provided on the end of the suction cup control rod protruding from the fixing base.

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