Digital deformation monitoring device for bridge support cast-in-place static load test
By designing a digital deformation monitoring device for bridge brackets, the problems of observing points being covered, reduced accuracy and high safety risks in the prior art are solved, and high precision, safe and reliable deformation monitoring and real-time data feedback are achieved.
Patent Information
- Application Number
- CN202421382525.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-18
AI Technical Summary
In the cast-in-place static load test of existing bridge brackets, the observation points are covered with pre-pressed materials and cannot be effectively observed; the observation points cannot be ensured to be observed at the same location at the same time, and due to the height of the bracket, the measurement work below the high pier bracket cannot be operated, resulting in a reduced observation accuracy, high safety risks, and untimely data processing, so the problem of deformation exceeding limit cannot be promptly reported.
A digital deformation monitoring device is designed, including an upper magnetic suction connector, an elevation transmission line, a lower magnetic suction counterweight connector, a laser reflector and a laser rangefinder. The device is fixed to the lower part of the bracket by an upper magnetic suction connector, the elevation transmission line remains vertical, and the laser reflector and laser rangefinder are used to accurately measure deformation.
The device can ensure that the observation point is fixed, reduce human error and improve monitoring accuracy without being affected by the pre-pressed material. At the same time, monitors stay away from high places to reduce safety risks, and data can be displayed and feedback in real time to reduce the occurrence of safety accidents.
Smart Images
Figure CN222598770U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge engineering construction, and in particular relates to a digital deformation monitoring device used for cast-in-place static load test of bridge brackets. Background Art
[0002] At present, in the field of highway, railway and municipal bridge engineering, when the beam body of cantilever casting or cast-in-place support is subjected to static load preloading test, the observation methods used are generally divided into two categories: one method is to set observation points at the mid-span, front end, rear end, left, middle and right sides of the top of the support, and use electronic level and indium tile ruler to observe the deformation before preloading, during preloading, during unloading and after unloading. After the observation is completed, the data is adjusted and calculated to analyze the elastic deformation and inelastic deformation values of the support;
[0003] The second method is to set observation points at the bottom of the support system, at the mid-span, front end, rear end, left, middle and right sides, respectively, and use the automatic leveling instrument and tower ruler to observe before preloading, during preloading, during unloading and after unloading by the inverted ruler method. After the observation is completed, the data is adjusted and calculated to analyze the elastic deformation and inelastic deformation values of the support;
[0004] However, the above method has the following problems:
[0005] When observing from above the support, the observation point is covered by the pre-loaded material and effective observation cannot be formed; when observing from below the support, the observation point cannot ensure simultaneous observation at the same position, and due to the height of the support, measurement work below the high pier support cannot be performed.
[0006] The observation accuracy is affected by the collision and displacement of the observation point, and the measurement error increases; due to the height of the pre-pressed material pile and the distance measurement, the visibility conditions and the short sight distance often cannot meet the requirements; when the surveyors work at high altitude or with a ruler under the bracket, the safety risk is high;
[0007] Data post-processing cannot provide timely feedback on excessive deformation problems found on site, which can easily lead to safety accidents; data processing requires secondary calculations, and calculation errors cannot be checked in time. Other personnel cannot understand the deformation of the bracket in real time, which is not conducive to safety control.
[0008] After the bracket preload is applied, the pier cap is deformed, which affects the observation accuracy of the rear and foresight points. When measuring the pier top, the measuring distance is short and effective readings cannot be obtained. Utility Model Content
[0009] In order to solve at least one of the above technical problems existing in the prior art, the utility model provides a digital deformation monitoring device for cast-in-place static load test of bridge support.
[0010] The utility model is implemented by the following technical scheme: a digital deformation monitoring device for cast-in-place static load test of bridge support, comprising an upper magnetic connection, an elevation transfer line, a lower magnetic counterweight connection, a laser reflection plate and a laser rangefinder; the upper magnetic connection is magnetically fixed to the lower rod of the support; the upper end of the elevation transfer line is connected to the upper magnetic connection, and the lower end is connected to the lower magnetic counterweight connection, and the elevation transfer line remains in a vertical state; the laser reflection plate is magnetically fixed to the lower end of the lower magnetic counterweight connection; the laser rangefinder is arranged on the ground directly below the laser reflection plate.
[0011] Preferably, a plurality of windproof pendulum pull lines are connected to the upper portion of the lower magnetic attraction counterweight connector, and the lower ends of the windproof pendulum pull lines are tied to steel nails on the ground.
[0012] Preferably, there are three windproof swing pull wires, which are arranged obliquely at 120 degrees; the upper ends of the windproof swing pull wires are tied and connected to the ear holes on the lower magnetic counterweight connector.
[0013] Preferably, a leveling steel plate is provided between the laser rangefinder and the ground, and the laser rangefinder is bolted to the upper end of the leveling steel plate.
[0014] Preferably, the upper magnetic connector includes a permanent magnet, a stainless steel round rod of different diameters and a screw. The permanent magnet is a cylinder and is embedded in a concave hole machined at the large diameter end of the stainless steel round rod of different diameters. The permanent magnet is connected to the large diameter concave hole of the stainless steel round rod of different diameters by interference fit. A light hole is drilled at the small diameter end of the stainless steel round rod, and a countersunk hole is drilled at the end. A circular hole is drilled on the side of the small diameter end of the stainless steel round rod and an internal thread is tapped. The thread diameter matches the screw, which plays the role of tightening the elevation transfer line. The upper end of the elevation transfer line is inserted into the light hole at the small diameter end of the upper magnetic connector and is tightened laterally with a screw.
[0015] Preferably, the lower magnetic counterweight connector has the same structure as the upper magnetic connector and faces oppositely; the small diameter end of the lower magnetic counterweight connector is at the top and the large diameter end is at the bottom; the upper end of the elevation transfer line is inserted into the light hole at the small diameter end of the upper magnetic connector and is fastened horizontally with screws.
[0016] Preferably, the leveling steel plate includes a steel plate and a level bubble. A level tube is arranged on each of the horizontal and vertical sides, respectively arranged in the middle position of the end of the steel plate. The groove on the steel plate is parallel to the top surface of the steel plate. The level bubble is embedded in the groove and fixed by bolts; the middle part of the steel plate has a bolt inner hole connected to the laser rangefinder bolt.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The observation point is not affected by the position of the preloading material, the requirements for the measurement personnel are not high, the observation data is reliable, and it can be displayed in real time; the observation point is fixed, in addition to observing the changes in the support during the static load process, it can also monitor the changes in the support during the pouring process; the observation point is located below the support, and the large magnetic force magnet can ensure that the observation point is fixed, reduce the measurement error, and improve the monitoring accuracy. It is not affected by changes in observation conditions and can also be monitored without line of sight.
[0019] The monitoring personnel are far away from the bottom of the support, which can avoid the safety risks caused by high-altitude operations. The number of measurement personnel is reduced, and one person can complete the entire operation, which reduces the workload, reduces the labor intensity, reduces the management cost, and is reliable. The operation and safety risk level are reduced. The deformation data exceeding the limit can be fed back to the site at any time, and measures can be taken in time to reduce the occurrence of inertial safety accidents; through electronic digital display means, the data recording and processing process is simplified, and the error transmission path caused by data processing is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a schematic diagram of the overall structure of this embodiment;
[0022] Figure 2 This is a parts diagram of the upper magnetic connection piece of this embodiment;
[0023] Figure 3 yes Figure 2 Sectional view at AA in the middle;
[0024] Figure 4 yes Figure 2 Cross-section at the middle BB;
[0025] Figure 5 yes Figure 2 Sectional view at CC;
[0026] Figure 6 is a parts diagram of the laser reflector plate of this embodiment;
[0027] Figure 7 yes Figure 6 Sectional view at AA in the middle;
[0028] Figure 8 It is the leveling steel plate parts diagram of this embodiment;
[0029] Fig. 9 yes Figure 8 The cross-sectional view at AA in FIG.
[0030] Fig.10 yes Figure 8 Cross-sectional view at BB in .
[0031] In the figure: 1-upper magnetic connection piece; 2-elevation transmission line; 3-lower magnetic counterweight connection piece; 4-laser reflection plate; 5-laser rangefinder; 6-windproof pendulum pull line; 7-leveling steel plate. DETAILED DESCRIPTION
[0032] Combined with the drawings in the embodiments of the utility model, the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities.
[0034] The utility model provides an embodiment:
[0035] like Figures 1 to 10 As shown, a digital deformation monitoring device for cast-in-place static load test of bridge support includes an upper magnetic connection 1, an elevation transfer line 2, a lower magnetic counterweight connection 3, a laser reflection plate 4 and a laser rangefinder 5;
[0036] The upper magnetic connector 1 is magnetically fixed to the lower rod of the bracket; the upper end of the elevation transfer line 2 is connected to the upper magnetic connector 1, and the lower end is connected to the lower magnetic counterweight connector 3, and the elevation transfer line 2 remains in a vertical state; the laser reflector plate 4 is magnetically fixed to the lower end of the lower magnetic counterweight connector 3; the laser rangefinder 5 is set on the ground directly below the laser reflector plate 4; a leveling steel plate 7 is set between the laser rangefinder 5 and the ground, and the laser rangefinder 5 is bolted to the upper end of the leveling steel plate 7.
[0037] A plurality of windproof pendulum pull wires 6 are connected to the upper part of the lower magnetic counterweight connector 3, and the lower ends of the windproof pendulum pull wires 6 are tied to the steel nails on the ground. In this embodiment, there are three windproof pendulum pull wires 6, which are arranged obliquely at 120 degrees; the upper ends of the windproof pendulum pull wires 6 are tied and connected to the ear holes on the lower magnetic counterweight connector 3.
[0038] The upper magnetic connector 1 includes a permanent magnet, a stainless steel round rod of different diameters and a screw. The permanent magnet is a cylinder and is embedded in a concave hole machined at the large diameter end of the stainless steel round rod of different diameters. The permanent magnet is connected to the large diameter concave hole of the stainless steel round rod of different diameters by interference fit. A 2mm smooth hole is drilled at the small diameter end of the stainless steel round rod, and a countersunk hole is drilled at the end; a circular hole is drilled on the side of the small diameter end of the stainless steel round rod and an internal thread is tapped. The thread diameter matches the screw, which plays the role of fastening the elevation transfer line 2. The elevation transfer line 2 is a national standard 0.4mm stainless steel wire. The length is cut on site according to the height of the bracket and the ground. The upper end is inserted into the smooth hole at the small diameter end of the upper magnetic connector 1 and fastened horizontally with screws.
[0039] The lower magnetic counterweight connector 3 has the same structure as the upper magnetic connector 1, but faces in the opposite direction; the small diameter end of the lower magnetic counterweight connector 3 is at the top, and the large diameter end is at the bottom; the upper end of the elevation transfer line 2 is inserted into the light hole at the small diameter end of the upper magnetic connector 1 and is tightened horizontally with screws. The laser reflector 4 is a 3mm stainless steel round plate with a diameter of 5cm. The laser rangefinder 5 is an industrial-grade high-precision laser rangefinder with a measurement accuracy of 0.2-0.8mm, a measurement distance of 100-200mm, and ±50~±80mm.
[0040] The leveling steel plate 7 includes a steel plate and a level bubble. The thickness of the steel plate is 1 cm. A level tube is set on each of the horizontal and vertical sides, respectively, and is set in the middle position of the end of the steel plate. The groove on the steel plate is parallel to the top surface of the steel plate. The level bubble is embedded in the groove and fixed by bolts; two bolt inner holes are drilled in the middle of the steel plate, and the inner hole diameter and spacing are fixed to the bottom of the high-precision laser rangefinder 5 by bolts.
[0041] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.
Claims
1. A digital deformation monitoring device for cast-in-place static load test of bridge supports, characterized in that: It comprises an upper magnetic connection piece (1), an elevation transmission line (2), a lower magnetic counterweight connection piece (3), a laser reflection plate (4) and a laser rangefinder (5); The upper magnetic connection piece (1) is magnetically fixed to the lower rod of the bracket; the upper end of the elevation transmission line (2) is connected to the upper magnetic connection piece (1), and the lower end is connected to the lower magnetic counterweight connection piece (3), and the elevation transmission line (2) is kept in a vertical state; the laser reflection plate (4) is magnetically fixed to the lower end of the lower magnetic counterweight connection piece (3); and the laser rangefinder (5) is arranged on the ground directly below the laser reflection plate (4).
2. A digital deformation monitoring device for cast-in-place static load test of bridge support according to claim 1, characterized in that: A plurality of windproof pendulum pull lines (6) are connected to the upper part of the lower magnetic attraction counterweight connecting piece (3), and the lower ends of the windproof pendulum pull lines (6) are tied to steel nails on the ground.
3. A digital deformation monitoring device for cast-in-place static load test of bridge support according to claim 2, characterized in that: The number of the windproof pendulum pull wires (6) is 3, and they are arranged obliquely at 120 degrees; the upper ends of the windproof pendulum pull wires (6) are tied and connected to the ear holes on the lower magnetic attraction counterweight connector (3).
4. The digital deformation monitoring device for cast-in-place static load test of bridge support according to claim 1 is characterized in that: A leveling steel plate (7) is arranged between the laser distance meter (5) and the ground, and the laser distance meter (5) is bolted to the upper end of the leveling steel plate (7).
5. The digital deformation monitoring device for cast-in-place static load test of bridge support according to claim 1 is characterized by: The upper magnetic connection piece (1) comprises a permanent magnet, a stainless steel round rod of different diameters and a screw. The permanent magnet is a cylinder and is embedded in a concave hole machined at the large diameter end of the stainless steel round rod of different diameters. The permanent magnet is connected to the large diameter concave hole of the stainless steel round rod of different diameters by interference fit. A light hole is drilled at the small diameter end of the stainless steel round rod and a countersunk hole is drilled at the end. A round hole is drilled at the side of the small diameter end of the stainless steel round rod and an internal thread is tapped. The thread diameter matches the screw and plays the role of fastening the elevation transmission line (2). The upper end of the elevation transmission line (2) is inserted into the light hole at the small diameter end of the upper magnetic connection piece (1) and is fastened transversely by a screw.
6. A digital deformation monitoring device for cast-in-place static load test of bridge support according to claim 5, characterized in that: The lower magnetic attraction counterweight connector (3) has the same structure as the upper magnetic attraction connector (1) but faces in opposite directions; the small diameter end of the lower magnetic attraction counterweight connector (3) is at the top and the large diameter end is at the bottom; the upper end of the elevation transmission line (2) is inserted into the light hole at the small diameter end of the upper magnetic attraction connector (1) and is transversely fastened with screws.
7. A digital deformation monitoring device for cast-in-place static load test of bridge support according to claim 4, characterized in that: The leveling steel plate (7) comprises a steel plate and a level bubble. One level tube is arranged on each of the horizontal and vertical sides and is arranged at the middle position of the end of the steel plate. The groove on the steel plate is parallel to the top surface of the steel plate. The level bubble is embedded in the groove and fixed by bolts. The middle of the steel plate has a bolt inner hole connected to the laser rangefinder (5) by bolts.