Measuring device for steel beam anti-bending lifting construction
By using force measurement and displacement measurement devices in the construction of steel-concrete composite beam bridges, the problem of mismatch between lifting force and steel beam displacement monitoring is solved, and accurate control and efficient measurement of steel beam reverse bending construction is achieved, which simplifies the construction process and reduces costs.
Patent Information
- Application Number
- CN202422431371.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In the pre-bending construction of steel-concrete composite beam bridges, the tension force and steel beam displacement monitoring do not match, which is greatly affected by the environment, and the accuracy of traditional measurement methods is difficult to ensure, and multiple station platforms are required, resulting in complex construction and high cost.
A steel beam reverse bending and pulling construction measurement device is designed, including a force measurement device, a displacement measurement device and a rotating connection device. It is installed on the longitudinal beam of the bridge mounter. The tensioning jack and pressure ring sensor are used to measure the lifting force, and the telescopic sleeve and contact alarm are used to measure the displacement, so as to achieve accurate control of the steel beam reverse bending process.
Accurate control of steel beam reverse bending construction is achieved, environmental interference is reduced, construction process is simplified, measurement accuracy and efficiency are improved, construction costs are reduced, adaptable and easy to dismantle and reuse.
Smart Images
Figure CN223138720U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of bridge construction in a civil engineering technology center, and particularly relates to a construction measurement device for reverse bending and lifting of steel girders. Background Technique
[0002] Pre-bent steel-concrete composite girders are widely used in bridges with a span of up to one hundred meters due to their excellent performance, strong load-bearing capacity, and good economy. Affected by topographical conditions, they often adopt the construction method of lifting and reverse bending with a bridge erection machine. The key factor affecting the overall performance of pre-bent composite girders is the lifting force value. In common construction, the control of the lifting process mainly takes the magnitude of the lifting force as the main control item, and the reverse bending displacement of the steel girder is used as a check. Affected by the bridge construction environment, the monitoring of the lifting force and the displacement of the steel girder often do not match, and for long-distance measurement, multiple survey stations need to be set up for total stations, making it difficult to ensure the measurement accuracy.
[0003] Therefore, developing a pre-bending construction device for steel-concrete composite girder bridges that is not affected by the environment can effectively solve such problems. Content of the Utility Model
[0004] To achieve the above object, the technical solution adopted by the utility model is: a construction measurement device for reverse bending and lifting of steel girders, which is applicable to measuring the lifting displacement of a measured steel girder by a longitudinal beam of a bridge erection machine. The longitudinal beam of the bridge erection machine is arranged above the measured steel girder. The utility model includes a lifting force and displacement monitoring device, which is installed on the longitudinal beam of the bridge erection machine, and the lower end can be telescoped to the measured steel girder. The lifting force and displacement monitoring device monitors the tensile force and displacement of the measured steel girder.
[0005] The lifting force and displacement monitoring device includes a force measuring device, a displacement measuring device, and a rotating connection device; the force measuring device is fixed on the longitudinal beam of the bridge erection machine, the force measuring device is connected in the rotating connection device, and one end of the rotating connection device is vertically connected to the displacement measuring device; the force measuring device is used for measuring the lifting force during the lifting of the steel girder; the displacement measuring device is used for measuring the displacement during the lifting of the steel girder; the rotating connection device cooperates with the displacement measuring device to ensure that the lifting force and displacement monitoring device contacts the measured steel girder.
[0006] The force measuring device includes a tension jack, a pressure ring sensor, and a pressure ring base; the tension jack is connected to the upper end face of the pressure ring sensor, the pressure ring sensor is connected in the pressure ring base, and the pressure ring base is fixedly installed on the longitudinal beam of the bridge erection machine.
[0007] The force measuring device is fixed to the mid-span position of the measured steel girder by bolting and welding.
[0008] The displacement measuring device includes a telescopic sleeve and a contact alarm; the upper end of the telescopic sleeve is connected to a rotating connection device, and the contact alarm is connected to the lower end of the telescopic sleeve. The displacement measuring device issues a warning signal for the reverse bending position of the steel beam. The rotating connector is fixed on the outer wall of the pressure ring base, and the end of the swing arm is connected to the displacement measuring device.
[0009] The telescopic sleeve is composed of multiple sections of retractable lightweight thin-walled steel pipes, and the telescopic sleeve is provided with scales for measuring the displacement of the steel beam.
[0010] The rotating connection device includes a circumferential rotating shaft, a swing arm, and a circumferential rotating shaft fastening bolt. The force measuring device is fitted in the circumferential rotating shaft, and the circumferential rotating shaft fastening bolt tightly connects the circumferential rotating shaft and the force measuring device; one end of the swing arm is connected to the outer surface of the circumferential rotating shaft, and the other end of the swing arm is connected to the displacement measuring device; the rotating connection device drives the displacement measuring device to rotate 360° around the force measuring device.
[0011] The end of the swing arm and the displacement measuring device are connected by screw twisting. Beneficial effects
[0012] 1. The utility model realizes the control of the reverse bending of the steel beam through the pressure ring and the telescopic rod, is convenient for construction, is not restricted by environmental factors, has little interference with construction, and has no impact on traffic.
[0013] 2. The utility model measures the reverse bending of the steel beam through the device, avoids the erection of the measuring station platform and the interference of traditional instrument measurement, has high on-site installation and automation degree, and is economical and efficient.
[0014] 3. The utility model is provided with a ring-shaped steering adjustment shaft, and the displacement measurement is not affected by other factors, and has strong adaptability.
[0015] 4. The utility model is convenient to disassemble and can be recycled.
[0016] 5. The telescopic rod of the utility model has a large range and small measurement error.
[0017] The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiment of the utility model and combines the attached drawings to describe in detail as follows. Brief description of the drawings
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0019] Figure 1 is the schematic diagram of the reverse bending and lifting of the steel beam of the present utility model;
[0020] Figure 2 is the front view of the layout of the tensile force and displacement monitoring during the reverse bending of the steel beam of the present utility model;
[0021] Figure 3 is the left view of the layout of the tensile force and displacement monitoring during the reverse bending of the steel beam of the present utility model;
[0022] Figure 4 is the diagram of the tensile force and displacement monitoring device of the present utility model in the extended state;
[0023] Figure 5 is the diagram of the tensile force and displacement monitoring device of the present utility model in the contracted state;
[0024] Figure 6 is the top view of the present utility model.
[0025] In the figure: 1. Measuring steel beam; 2. Erector longitudinal beam; 3. Tensioning jack; 4. Pressure ring sensor; 5. Pressure ring base; 6. Telescopic sleeve; 7. Contact alarm; 8. Circumferential rotating shaft; 9. Swing arm; 10. Circumferential rotating shaft fastening bolt; 111. Force measuring device; 222. Displacement measuring device; 333. Rotating connection device. Specific implementation manner
[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. Embodiment
[0027] According to Figures 1-6 A steel beam reverse bending and lifting construction measurement device shown is applicable to the measurement of the lifting displacement of the measuring steel beam by the erector longitudinal beam. The erector longitudinal beam is arranged above the measuring steel beam. The present utility model includes a tensile force and displacement monitoring device. The tensile force and displacement monitoring device is installed on the erector longitudinal beam 2, and the lower end can be telescoped to the measuring steel beam 1. The tensile force and displacement monitoring device monitors the tensile force and displacement of the measuring steel beam 1.
[0028] Further, as Figure 3As shown in the figure, the lifting force and displacement monitoring device includes a force measuring device 111, a displacement measuring device 222, and a rotating connection device 333; the force measuring device 111 is fixed on the longitudinal beam 2 of the bridge erecting machine, the force measuring device 111 is connected in the rotating connection device 333, and one end of the rotating connection device 333 is vertically connected to the displacement measuring device 222; the force measuring device 111 is used to measure the lifting force during the lifting process of the measuring steel beam 1; the displacement measuring device 222 is used to measure the displacement during the lifting process of the steel beam 1; the rotating connection device 333 cooperates with the displacement measuring device 222 to ensure that the lifting force and displacement monitoring device contacts the measuring steel beam 1.
[0029] Further, as Figure 3 and Figure 4 shown in the figure, the force measuring device 111 includes a tension jack 3, a pressure ring sensor 4, and a pressure ring base 5; the tension jack 3 is connected to the upper end face of the pressure ring sensor 4, the pressure ring sensor 4 is connected in the pressure ring base 5, and the pressure ring base 5 is fixedly installed on the longitudinal beam 2 of the bridge erecting machine.
[0030] The force measuring device 111 is bolted and welded at the mid-span position of the measuring steel beam 1. During construction, first install the force measuring device, then pass one end of the cable through the pressure ring sensor and the other end through the steel beam top plate, and use a jack for tensioning. The tension force tightens the cable, and the jack applies pressure to the pressure ring, which is the cable force.
[0031] Further, as Figure 4 shown in the figure, the displacement measuring device 222 includes a telescopic sleeve 6 and a contact alarm 7; the upper end of the telescopic sleeve 6 is connected to the rotating connection device 333, the contact alarm 7 is connected to the lower end of the telescopic sleeve 6, and the displacement measuring device 222 issues a warning signal to the anti-bending position of the steel beam 1. The rotating connector 333 is fixed on the outer wall of the pressure ring base 5, and the end of the swing arm 9 is connected to the displacement measuring device 222.
[0032] The telescopic sleeve 6 is composed of multiple sections of telescopic lightweight thin-walled steel pipes. The telescopic sleeve 6 is provided with scales for measuring the displacement of the steel beam 1.
[0033] The displacement measuring device 222 is arranged at the end of the swing arm 9 of the rotating connection device 333 and is connected by a screw thread rotation method. It consists of a telescopic sleeve 6 with scales and a contact alarm 7. Before the tensioning construction, tighten the screw thread in advance to keep the sleeve position unchanged, and then gradually stretch the sleeve to the tension control position. After the steel beam is in place with anti-bending, when the beam top plate touches the sleeve alarm, the alarm starts to give a warning, and the tensioning construction is in place.
[0034] Further, as Figure 5 and Figure 6As shown in the figure, the rotational connection device 333 includes a circumferential rotating shaft 8, a swing arm 9, and a circumferential rotating shaft fastening bolt 10. The force measuring device 111 is fitted into the circumferential rotating shaft 8. The rotational connection device 333 is connected to the force measuring device 111 through the circumferential rotating shaft fastening bolt 10. One end of the swing arm 9 is connected to the outer surface of the circumferential rotating shaft 8, and the other end of the swing arm 9 is connected to the displacement measuring device 222. The rotational connection device 333 drives the displacement measuring device 222 to rotate 360° around the force measuring device 111.
[0035] The end of the swing arm 9 and the displacement measuring device 222 are connected by screw twisting.
[0036] The rotational connection device 333 is arranged on the outer wall of the pressure ring base 5. The end of the swing arm 9 is connected to the displacement measuring device 222. The circumferential rotating shaft fastening bolt tightly connects the circumferential rotating shaft and the force measuring device. The rotational connection device 333 can be disassembled and recycled. The rotational connection device 333 drives the displacement measuring device to rotate 360° around the pressure ring, preventing the top plate of the steel beam from touching the contact alarm when measuring the displacement of the steel beam.
[0037] The utility model solves the problems of unclear lifting force and difficulty in measuring the displacement of the steel beam during the reverse bending construction of the steel beam, high input of traditional measurement, and difficulty in controlling the accuracy. Through two control factors of lifting force and measuring the displacement of the steel beam, precise control of the reverse bending construction of the steel beam is achieved. The whole is convenient and efficient, and the overall pre-bending of the steel beam can be quickly realized. Specifically, during the reverse bending construction of the steel beam, the construction state of the steel beam is monitored by synchronously measuring through the force measuring device and the displacement measuring device. When using the lifting force to control and measure the reverse bending of the steel beam, lift it to the design value, and read the displacement of the measured steel beam in the current state, indicating the reverse bending degree of the currently measured steel beam. When using the lifting displacement control, set the position of the telescopic sleeve. When the steel beam is lifted to the top plate in contact with the telescopic sleeve sensor, the alarm gives an early warning, and the current pressure ring reading is the control pulling force for measuring the lifting of the steel beam.
[0038] The purpose of the utility model is to provide a device for pre-bending the steel beam of a steel-concrete composite beam bridge, which has reasonable force, convenient construction, simple concept, and good technical and economic benefits. It mainly includes the following steps:
[0039] 1. When the reverse bending of the steel beam is mainly controlled by displacement and supplemented by lifting force:
[0040] S11. Use the longitudinal beam of the bridge erecting machine to hoist and measure the steel beam;
[0041] S22. Install the tension and displacement monitoring devices;
[0042] S33. Pass the steel wire rope through, fix the upper end with a tensioning jack, and anchor the lower end on the top plate of the measured steel beam, and read the initial reading of the pressure ring;
[0043] S44. Adjust the rotating connection device to ensure that the telescopic sleeve contacts the top plate of the measuring steel beam;
[0044] S55. Tighten the telescopic sleeve and successively stretch the sleeve from the end to the designed lifting position of the measuring steel beam;
[0045] S66. Tension with a jack. When the measuring steel beam bends back until the top plate contacts the telescopic sleeve, the alarm gives a warning, and read the final reading of the compressive stress.
[0046] S77. Complete the monitoring of the lifting force and the displacement of the steel beam during the lifting process.
[0047] II. When the bending back of the steel beam is mainly controlled by the lifting force and supplemented by the displacement:
[0048] S11. Use the girder crane to hoist the measuring steel beam longitudinally;
[0049] S22. Install the tension and displacement monitoring devices;
[0050] S33. Pass the steel wire rope through. The upper end is fixed by the tensioning jack, and the lower end is anchored to the top plate of the steel beam. Read the initial reading of the pressure ring;
[0051] S44. Adjust the rotating connector to ensure that the telescopic sleeve contacts the top plate of the steel beam;
[0052] S55. Tighten the telescopic sleeve and keep it in the initial position without moving;
[0053] S66. Tension with a jack. When the pressure ring sensor reaches the designed tension, stop the tensioning.
[0054] S77. Stretch the telescopic sleeve and read the displacement of the steel beam.
[0055] Without conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific combinations are not elaborated here one by one.
[0056] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.
[0057] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.
[0058] The above are only the preferred embodiments of the present utility model. The present utility model will not be limited to these embodiments shown herein, but rather should conform to the broadest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A construction survey device for reverse bending and lifting of steel beams, applicable to measuring the lifting displacement of a measured steel beam (1) by a longitudinal beam (2) of a bridge erecting machine. The longitudinal beam (2) of the bridge erecting machine is arranged above the measured steel beam (1), and is characterized in that: It includes a lifting force and displacement monitoring device which is installed on the longitudinal beam (2) of the bridge erecting machine and whose lower end can be telescoped to the measuring steel beam (1). The lifting force and displacement monitoring device monitors the tensile force and displacement of the measuring steel beam (1). The lifting force and displacement monitoring device includes a force measuring device (111), a displacement measuring device (222) and a rotational connection device (333). The force measuring device (111) is fixed on the longitudinal beam (2) of the bridge erecting machine. The force measuring device (111) is connected in the rotational connection device (333), and one end of the rotational connection device (333) is vertically connected to the displacement measuring device (222). The force measuring device (111) is used to measure the lifting force during the lifting process of the steel beam (1). The displacement measuring device (222) is used to measure the displacement during the lifting process of the steel beam (1). The rotational connection device (333) cooperates with the displacement measuring device (222) to ensure the contact between the lifting force and displacement monitoring device and the measuring steel beam (1).
2. The construction survey device for reverse bending and lifting of steel beams according to claim 1, characterized in that: The force measuring device (111) includes a tension jack (3), a pressure ring sensor (4) and a pressure ring base (5). The tension jack (3) is connected to the upper end face of the pressure ring sensor (4), and the pressure ring sensor (4) is connected in the pressure ring base (5). The pressure ring base (5) is fixedly installed on the longitudinal beam (2) of the bridge erecting machine.
3. The steel beam reverse bending and lifting construction measurement device according to claim 2, wherein: The force measuring device (111) is fixed by bolting and welding at the mid-span position of the measuring steel beam (1).
4. A construction measurement device for reverse bending and lifting of steel beams according to claim 1, characterized in that: The displacement measuring device (222) includes a telescopic sleeve (6) and a contact alarm (7). The upper end of the telescopic sleeve (6) is connected to the rotational connection device (333), and the contact alarm (7) is connected to the lower end of the telescopic sleeve (6). The displacement measuring device (222) issues a warning signal at the reverse bending position of the steel beam (1).
5. A construction surveying device for reverse bending and lifting of steel beams according to claim 4, characterized in that: The telescopic sleeve (6) is composed of multiple sections of telescopic lightweight thin-walled steel pipes. The telescopic sleeve (6) is provided with scales for measuring the displacement of the steel beam (1).
6. The construction survey device for reverse bending and lifting of steel beams according to claim 1, characterized in that: The rotational connection device (333) includes a circumferential rotating shaft (8), a swing arm (9) and a circumferential rotating shaft fastening bolt (10). The force measuring device (111) is fitted in the circumferential rotating shaft (8), and the circumferential rotating shaft fastening bolt (10) tightly connects the circumferential rotating shaft (8) and the force measuring device (111). One end of the swing arm (9) is connected to the outer surface of the circumferential rotating shaft (8), and the other end of the swing arm (9) is connected to the displacement measuring device (222). The rotational connection device (333) drives the displacement measuring device (222) to rotate 360° around the force measuring device (111).
7. A construction survey device for reverse bending and lifting of steel beams according to claim 6, characterized in that: The end of the swing arm (9) is connected to the displacement measuring device (222) by screw twisting.