Bridge swivel monitoring construction method

Abstract

The application discloses a bridge swivel monitoring construction method, which comprises the following steps: simultaneously constructing a to-be-swiveled beam and an adjacent side span beam; according to design drawings, a pair of pre-buried parts are symmetrically arranged in a transverse bridge direction of a lower part of a top plate of the to-be-swiveled beam and a transverse bridge direction of a lower part of a top plate of the side span beam, wherein a laser emission module is arranged on the pre-buried part of the to-be-swiveled beam, a laser target is arranged on the pre-buried part of the side span beam, the laser target is connected with a controller, and the controller is connected with a wireless communication module. The application reduces the safety risk of a construction site and guarantees the quality of construction.

Description

Technical Field

[0001] This invention relates to the field of bridge construction. More specifically, this invention relates to a method for monitoring bridge rotation during construction. Background Technology

[0002] With rapid economic and technological development, the number of highways has increased dramatically. Many highways intersect with existing railway lines, so bridge rotation construction is often used for these crossing sections. Construction is carried out at the designed locations on both sides of the existing railway. After the bridge structure is completed, a rotation device is used to rotate the beams. This method has advantages such as not disrupting traffic, rapid construction, and economic benefits. Currently, there are some deviations during bridge rotation. Measurement points are often set at the beam ends, which can easily lead to the beams rotating too far. In addition, after the bridge is rotated, it needs to be joined with the side span beams. After the bridge is completed, the uneven load of vehicles can cause cracking in the joined section, especially at the joint, reducing the service life of this structure. Summary of the Invention

[0003] The purpose of this invention is to provide a bridge rotation monitoring construction method that reduces safety risks at the construction site and ensures construction quality.

[0004] The technical solution adopted by this invention to solve this technical problem is: a bridge rotation monitoring construction method, comprising the following steps:

[0005] S1. Simultaneous construction of the rotating beam and its adjacent side span beam; According to the design drawings, a pair of embedded parts are symmetrically set in the transverse direction at the bottom of the top plate of the rotating beam and the transverse direction at the bottom of the top plate of the side span beam. The embedded parts of the rotating beam are equipped with laser emission modules, and the embedded parts of the side span beam are equipped with laser targets. The laser targets are connected to the controller, and the controller is connected to the wireless communication module.

[0006] S2. After the beam segment reaches the design strength and passes the acceptance test, the rotation device is set up, the rotation segment support is dismantled, and the preparatory work before rotation is completed.

[0007] S3. The rotating beam rotates via a rotating device. Once the rotating beam reaches a position where the laser target receives the laser emitted by the laser emission module, fine-tuning begins, specifically including:

[0008] S31. After receiving the laser information, the laser target transmits the laser information to the controller. The controller converts the laser information into laser point position coordinates (x1, y1, z1) and compares them with the preset laser point position coordinates (x1, y1, z1). a ,y a ,z a The difference between the laser point and the preset laser point is obtained by comparison. ;

[0009] S32. Fine-tune the position of the rotating beam in the XY direction using the rotating device until the laser point aligns with the preset laser point. The difference is within the allowable error;

[0010] S33. Adjust the position of the rotating beam along the Z-axis until the difference between the laser point and the preset laser point Δz1 is within the allowable error.

[0011] S4. Complete the construction of the closure section between the rotating beam and the side span beam.

[0012] Preferably, the rotating device in S3 includes a lower ball joint, a slide rail, an upper ball joint, a rotating traction system, and an axis fine-tuning system.

[0013] Preferably, the closure section in step S4 is constructed by cast-in-place construction.

[0014] Preferably, a local adjustment device is installed simultaneously during the construction of the rotating beam and the side span beam, which includes: a first embedded seat, a second embedded seat, a third embedded seat, a steel connecting rod, a first jacking rod, a second jacking rod, a third jacking rod, and a pressure sensor;

[0015] In S1, during construction, the rotating beam and the side span beam have first and second embedded seats pre-embedded in the webs on both sides. The pre-embedding method is as follows: the first and second embedded seats are symmetrically embedded on both sides of the webs near the lower part of the flange, with the first embedded seat of the rotating beam and the second embedded seat of the side span beam on the same side, and vice versa. In S4, during construction, the closure section has third embedded seats pre-embedded in the webs on both sides. After the closure section reaches its design strength, the first and second embedded seats on the same side are then pre-embedded in the webs. Steel connecting rods are fixed in the second and third pre-embedded seats. The first, third and second pre-embedded seats are arranged sequentially along the bridge direction. A third push rod is installed on the first pre-embedded seat. The top of the third push rod has a rubber pad and a pressure sensor. The third push rod is configured to support the wing plate. The third pre-embedded seat is provided with a first push rod, and the second pre-embedded seat is provided with a second push rod. The tops of the first and second push rods are both provided with rubber pads. The pressure sensor is connected to the controller.

[0016] The controller is configured to: take one side along the longitudinal direction of the bridge as a reference, receive pressure information from the pressure sensor, and when the pressure value detected by the pressure sensor of the third push rod is greater than a set value, calculate the difference between the pressure information and the set pressure value. and the difference Converted to push rod stroke L, the controller controls the first push rod in the reverse bridge direction to rise upward by 60%-80%L, the third push rod in the reverse bridge direction to rise upward by 40%-60%L, and simultaneously controls the first push rod in the forward bridge direction to retract downward by 60%-80%L, and the second push rod in the forward bridge direction to retract downward by 40%-60%L.

[0017] The present invention offers at least the following advantages: the bridge rotation monitoring construction method of this application reduces safety risks at the construction site and ensures construction quality. Laser information enables rapid acquisition of the position of the rotating beam, preventing issues such as delayed detection at the beam end and over-rotation of the beam. By setting up a local adjustment device to adjust the stress on the closure section, the closure section can adapt to the eccentric loads of the rotating beam and the side span beams, improving the stress condition of the beam at that location.

[0018] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation of the laser emitting module and the laser target of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of the local adjustment device of the present invention;

[0021] Figure 3 This is a top view of the installation of the partial adjustment device of the present invention;

[0022] Figure 4 This is a side view of the laser target installation of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Laser emitting module; 2. Laser target; 3. Embedded part; 5. Wing plate; 6. Web plate; 7. First embedded seat; 8. Second embedded seat; 9. Third embedded seat; 10. Steel connecting rod; 11. First push rod; 12. Second push rod; 13. Third push rod; 14. Pressure sensor; 15. Rotating beam; 16. Side span beam; 17. Closing section; 18. Rubber pad. Detailed Implementation

[0024] The present invention will now be described in detail and completely with reference to the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention with reference to the accompanying drawings, it should be particularly noted that the technical solutions and features provided in various parts of the present invention, including the following description, can be combined with each other without conflict.

[0025] Furthermore, the embodiments of the present invention described below are generally only some, not all, of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific implementation process is as follows:

[0027] like Figures 1-4 As shown, the present invention provides a bridge rotation monitoring construction method, including the following steps:

[0028] S1. Simultaneous construction of the rotating beam 15 and its adjacent side span beam 16; specifically including: simultaneous construction of pile foundations, pile caps, piers, and cap beams; sequentially completing the concrete pouring and tensioning of the rotating section box girder in segments, and simultaneously constructing the foundations of the monitoring network on both sides of the rotating section, guardrails, and anti-falling object walls, and other ancillary facilities. According to the design drawings, a pair of embedded parts 3 are symmetrically set in the transverse direction at the bottom of the top plate of the rotating beam 15 and the transverse direction at the bottom of the top plate of the side span beam 16. A laser emission module 1 is installed on the embedded part 3 of the rotating beam 15, and a laser target 2 is installed on the embedded part 3 of the side span beam 16. The laser target 2 is connected to a controller, and the controller is connected to a wireless communication module.

[0029] S2. After the beam segment reaches the design strength and passes the acceptance test, the rotation device is set up, the rotation segment support is dismantled, and the preparatory work before rotation is completed.

[0030] S3. The rotating beam 15 rotates via a rotating device. When the rotating beam 15 rotates to the point where the laser target 2 receives the laser emitted by the laser emission module 1, fine-tuning begins, specifically including:

[0031] S31. After receiving the laser information, the laser target 2 transmits the laser information to the controller. The controller converts the laser information into laser point position coordinates (x1, y1, z1) and compares them with the preset laser point position coordinates (x1, y1, z1). a ,y a ,z a The difference between the laser point and the preset laser point is obtained by comparison. ;

[0032] S32. Fine-tune the position of the rotating beam 15 in the XY direction using the rotating device until the laser point aligns with the preset laser point. The difference is within the allowable error;

[0033] S33. Adjust the position of the rotating beam 15Z axis until the difference between the laser point and the preset laser point Δz1 is within the allowable error.

[0034] S4. Complete the construction of the closure section 17 between the rotating beam 15 and the side span beam 16.

[0035] In the above embodiment, based on the existing rotating device, a laser target 2 and a laser emitting module 1 are installed on the lower part of the top plate of the rotating beam 15 and the side span beam 16. This is an unobstructed, through-type structure. The position of the rotating beam 15 can be quickly obtained through laser information, preventing the beam end detection point from being captured in time and the beam from rotating too much.

[0036] This technical solution may also include the following technical details to better achieve the technical effect: the rotating device in S3 includes a lower ball joint, a slide, an upper ball joint, a rotating traction system, and an axis fine-tuning system.

[0037] This technical solution may also include the following technical details to better achieve the technical effect: the closure section 17 in step S4 is constructed by cast-in-place construction.

[0038] This technical solution may also include the following technical details to better achieve the technical effect: When constructing the rotating beam 15 and the side span beam 16, a local adjustment device is installed simultaneously, which includes: a first embedded seat 7, a second embedded seat 8, a third embedded seat 9, a steel connecting rod 10, a first jacking rod 11, a second jacking rod 12, a third jacking rod 13 and a pressure sensor 14.

[0039] In S1, during construction, the rotating beam 15 and the side span beam 16 have first embedded seats 7 and second embedded seats 8 pre-embedded in the web plates 6 on both sides. The pre-embedding method is that the first embedded seats 7 and second embedded seats 8 are symmetrically pre-embedded on both sides of the web plate 6 near the lower part of the flange 5 of the rotating beam 15 / side span beam 16, and the first embedded seat 7 of the rotating beam 15 and the second embedded seat 8 of the side span beam 16 are on the same side. In S4, during construction, the closure section 17 has third embedded seats 9 pre-embedded in the web plates 6 on both sides. After the closure section 17 reaches the design strength, the first embedded seats 7 and second embedded seats 8 are pre-embedded in the web plates 6 on the same side. Steel connecting rods 10 are fixed in embedded seat 8 and third embedded seat 9. Along the bridge direction (vehicle travel direction), there are first embedded seat 7, third embedded seat 9 and second embedded seat 8 in sequence. A third push rod 13 is installed on the first embedded seat 7. The top of the third push rod 13 has a rubber pad 18 and a pressure sensor 14. The third push rod 13 is configured to support the wing plate 5. The third embedded seat 9 is provided with a first push rod 11 and the second embedded seat 8 is provided with a second push rod 12. The tops of the first push rod 11 and the second push rod 12 are both provided with rubber pads. The pressure sensor 14 is connected to the controller.

[0040] The controller is configured to: take one side along the longitudinal direction of the bridge as a reference, receive pressure information from pressure sensor 14, and when the pressure value detected by pressure sensor 14 of the third push rod 13 is greater than a set value, calculate the difference between the pressure information and the set pressure value. and the difference Converted to the stroke L of the jacking rods, the controller controls the first jacking rod 11 in the reverse direction to rise 60%-80%L, and the third jacking rod 13 in the reverse direction to rise 40%-60%L. Simultaneously, it controls the first jacking rod 11 in the forward direction to retract 60%-80%L, and the second jacking rod 12 in the forward direction to retract 40%-60%L. Since the closure section 17 is located between the rotating beam 15 and the side span beam 16, after the bridge is opened to traffic, the eccentric load of vehicles causes cracking problems in the closure section 17, especially at the joint, reducing the service life of this structure. This embodiment adjusts the force on the closure section 17 by setting a local adjustment device, enabling the closure section 17 to adapt to the eccentric load of the rotating beam 15 and the side span beam 16, thus improving the stress condition of the beam at this location.

[0041] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A bridge rotation monitoring construction method, characterized in that, Includes the following steps: S1. Simultaneous construction of the beam to be rotated and its adjacent side span beam; according to the design drawings, a pair of embedded parts are symmetrically set in the transverse direction at the bottom of the top plate of the rotating beam and the transverse direction at the bottom of the top plate of the side span beam. The embedded parts of the rotating beam are equipped with laser emission modules, and the embedded parts of the side span beam are equipped with laser targets. The laser targets are connected to the controller, and the controller is connected to the wireless communication module. The wireless communication module is used to transmit the laser information fed back by the laser targets and the deviation data calculated by the controller in real time. S2. After the beam segment reaches the design strength and passes the acceptance test, the rotation device is set up, the rotation segment support is dismantled, and the preparatory work before rotation is completed. S3. The rotating beam rotates via a rotating device. Once the rotating beam reaches a position where the laser target receives the laser emitted by the laser emission module, fine-tuning begins, specifically including: S31. After receiving the laser information, the laser target transmits the laser information to the controller. The controller converts the laser information into laser point position coordinates (x1, y1, z1) and compares them with the preset laser point position coordinates (x1, y1, z1). a ,y a ,z a The difference between the laser point and the preset laser point is obtained by comparison. ; S32. Fine-tune the position of the rotating beam in the XY direction using the rotating device until the laser point aligns with the preset laser point. The difference is within the allowable error; S33. Adjust the position of the rotating beam along the Z-axis until the difference between the laser point and the preset laser point ∆z1 is within the allowable error. S4. Complete the construction of the closure section between the rotating beam and the side span beam; In step S4, the closure section is constructed by cast-in-place construction; during the construction of the rotating beam and the side span beam, a local adjustment device is installed simultaneously, which includes: a first embedded seat, a second embedded seat, a third embedded seat, a steel connecting rod, a first jacking rod, a second jacking rod, a third jacking rod, and a pressure sensor. In S1, during construction, the rotating beam and the side span beam have first and second embedded seats pre-embedded in the webs on both sides. The pre-embedding method is as follows: the first and second embedded seats are symmetrically embedded on both sides of the webs near the lower part of the flange, with the first embedded seat of the rotating beam and the second embedded seat of the side span beam on the same side, and vice versa. In S4, during construction, the closure section has third embedded seats pre-embedded in the webs on both sides. After the closure section reaches its design strength, the first and second embedded seats on the same side are then pre-embedded in the webs. Steel connecting rods are fixed in the second and third pre-embedded seats. The first, third and second pre-embedded seats are arranged sequentially along the bridge direction. A third push rod is installed on the first pre-embedded seat. The top of the third push rod has a rubber pad and a pressure sensor. The third push rod is configured to support the wing plate. The third pre-embedded seat is provided with a first push rod, and the second pre-embedded seat is provided with a second push rod. The tops of the first and second push rods are both provided with rubber pads. The pressure sensor is connected to the controller. The controller is configured as follows: taking one side along the bridge direction as a reference, the controller receives pressure information from the pressure sensor. When the pressure value detected by the pressure sensor of the third push rod is greater than the set value, the controller calculates the difference ∆F between the pressure information and the set pressure value, and converts the difference ∆F into the push rod stroke L. The controller controls the first push rod in the reverse bridge direction to rise upward by 60%-80%L, the third push rod in the reverse bridge direction to rise upward by 40%-60%L, and simultaneously controls the first push rod in the bridge direction to retract downward by 60%-80%L, and the second push rod in the bridge direction to retract downward by 40%-60%L.

2. The bridge rotation monitoring construction method as described in claim 1, characterized in that, The rotating device in S3 includes a lower ball joint, a slide rail, an upper ball joint, a rotating traction system, and an axis fine-tuning system.

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