Self-rotating intelligent continuous pushing device and method for steel-concrete composite beam bridge

Abstract

The invention relates to the technical field of fabricated bridge construction, and discloses a self-rotating intelligent continuous pushing device for a steel-concrete composite girder bridge, which comprises two groups of self-rotating jacking devices, each group of self-rotating jacking devices consists of four minimum units, and each minimum unit comprises a base for supporting the whole device main body, a height-adjustable vertical adjusting power component is mounted at the upper part of the base; the rotating component is installed on the upper portion of the vertical adjusting power component and used for driving a tray installed on the upper portion of the rotating component to rotate, and the surface layer of the tray is sleeved with a rubber mat used for making buffer contact with a beam bridge; the rotating component is adjusted by the vertical adjusting power component to change the inclination angle of the tray. The two sets of self-rotating jacking devices are alternately started to operate, alternate continuous propelling of a beam body is achieved through rotating friction force generated by the pushing device, the fabricated large-span steel-concrete composite beam bridge body is accurately, rapidly and safely propelled to a preset position, and the device has good application value.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated bridge construction, and in particular to a self-rotating intelligent continuous jacking device and method for a steel-concrete composite beam bridge. Background Art

[0002] Prefabricated bridges have the advantages of short construction period and green environmental protection. At present, due to the lack of large-scale lifting equipment for large-span prefabricated beam bridges, the jacking method has become the preferred solution for the construction of the superstructure of prefabricated large-span steel-concrete composite beam bridges. The jacking method can reduce the quality problems of on-site manual operations, reduce labor, and improve project quality and progress. At present, the main methods of bridge jacking in my country are dragging and walking. Among them, the dragging jacking construction can easily cause greater damage to the beam body and has low efficiency. During the pushing process, one side of the beam body is prone to warping. The walking jacking method has a high cost. Due to the interruption of the pushing process, it has the disadvantage of low jacking speed. For curved beam bridges, the construction efficiency and accuracy of the dragging and walking jacking construction methods will be further reduced.

[0003] In order to solve the above problems, the present invention aims to provide a self-rotating intelligent continuous jacking device for an assembled large-span steel-concrete composite beam bridge. This jacking device not only has a low cost and low energy consumption, but also causes less damage to the bridge. It can continuously advance with a small offset, thereby simplifying the construction process and improving the jacking construction efficiency of the upper structure of the assembled large-span steel-concrete composite beam bridge. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a self-rotating intelligent continuous jacking device and method for a steel-concrete composite beam bridge, which solves the problem that the current jacking method of bridges in my country is prone to cause significant damage to the beam body and has low construction efficiency.

[0005] To achieve the above purpose, the present invention is implemented by the following technical scheme: a self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge, which includes two groups of self-rotating jacking devices, each group is composed of four minimum units, and the minimum unit includes:

[0006] A base for supporting the entire device body, with a height-adjustable vertical power component installed on the upper part;

[0007] A rotating member, which is installed on the upper part of the vertical adjustment power member and is used to drive the tray installed on the upper part thereof to rotate, and the surface of the tray is provided with a rubber pad for buffering contact with the beam bridge;

[0008] The rotating component changes the tilt angle of the pallet under the adjustment of the vertical adjustment power component. In all minimum units, the tilt angle of the pallet is the same and less than 45°. During construction, the pallet changes its tilt angle alternately to the left and right. At the same time, the driving motors in the two sets of self-rotating jacking devices are alternately started to rotate forward and reverse, driving the pallet to rotate counterclockwise or clockwise. The beam body in contact with the rubber pad on the surface of the pallet is continuously pushed forward under the action of the rotating friction force.

[0009] Preferably, the vertical adjustment power component includes a support fixedly mounted on the top of the base, and a circular track is also provided on the upper part of the support. A plurality of power rods are movably mounted around the upper part of the support, and the tops of the plurality of power rod bodies are movably mounted around the bottom of the circular track.

[0010] Preferably, the rotating component includes a rotating ring rotatably connected to the top of the circular track, a first gear is rotatably installed in the middle of the circular track, the tray is installed on the upper part of the first gear, and a driving motor is also installed on one side of the middle of the circular track, and its output end is fixedly connected to a second gear meshing with the first gear, which is used to drive the tray fixedly connected to it to rotate.

[0011] A jacking method of a self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge, comprising the following steps:

[0012] S1. Installation of the device: First, install the smallest unit of the two sets of self-rotating jacking devices on the bridge pier or temporary support device, and adjust the preset angle of the smallest unit to complete the preparation work;

[0013] S2. Install the automatic positioning device: Before construction, set multiple displacement measuring points on the prefabricated beam, and input the theoretical displacement values ​​of the measuring points into the Beidou displacement automatic acquisition receiving device terminal;

[0014] S3, jacking construction: alternately start the driving motors in the minimum units of the two sets of self-rotating jacking devices to drive the second gear to rotate, so that the first gear drives the tray with the rubber pad on the surface to rotate, and under the action of the rotating friction force, the beam body is alternately and continuously pushed;

[0015] S4, displacement adjustment: when the measured horizontal maximum displacement in the transverse direction exceeds the maximum allowable deviation value of the beam in the transverse direction When the control device is turned on, the control device performs reverse operation until the relative difference between the final position of the beam and the theoretical position satisfies formula (3), and the jacking construction is completed.

[0016] Preferably, in the step S2, the Beidou displacement automatic acquisition receiving device terminal automatically acquires the displacement values ​​of each measuring point of the beam body during the jacking process in real time, and the displacement acquisition frequency satisfies the following formula:

[0017]

[0018] Where, f is the beam displacement acquisition frequency (Hz); is the maximum allowable deviation of the beam along the bridge direction (m); r is the radius of the tray of this device (m); ω is the angular velocity of the tray driven by the first gear (rad / s).

[0019] Preferably, in step S3, when the beam bridge is pushed forward, the actual displacement value of the measuring point is collected in real time by the Beidou displacement automatic collection and receiving device, and a data comparison is made according to the actual displacement value and the theoretical displacement value of the beam bridge, and the operating state of the device is adjusted. The displacement of each measuring point during the pushing process needs to satisfy the following formula:

[0020] ω1≤r2ω / r1 Formula (2)

[0021] In formula (2), ω1 is the angular velocity of the second gear, (rad / s); r1 is the rotation radius of the second gear, (m); r2 is the rotation radius of the first gear, (m).

[0022] Preferably, in step S4, the relative difference between the final position of the beam and the theoretical position satisfies the following formula:

[0023]

[0024] In formula (3), is the difference between the horizontal displacement of the i-th measuring point in the transverse direction of the bridge and the theoretical value, (m); is the maximum allowable deviation of the beam in the transverse direction of the bridge, (m); in formula (4), is the difference between the horizontal displacement of the ith measuring point along the bridge and the theoretical value, (m).

[0025] The present invention provides a self-rotating intelligent continuous jacking device and method for a steel-concrete composite beam bridge. It has the following beneficial effects:

[0026] 1. The present invention is provided with a vertically adjustable power component with adjustable height, which can adjust the angle of the pallet. During construction, the pallet changes its inclination angle alternately to the left and right. At the same time, the driving motors in the two sets of self-rotating jacking devices are alternately started to rotate forward and reverse, thereby driving the pallet to rotate counterclockwise or clockwise. The beam body in contact with the rubber pad on the surface of the pallet is continuously pushed forward with a small offset under the action of the rotating friction force, and the construction efficiency and precision are high.

[0027] 2. The present invention provides an elliptical high-strength tray with a rubber pad on the surface to contact the beam body, which can effectively protect the beam body from damage, thereby improving the construction progress and ensuring the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1A three-dimensional diagram of the device of the present invention;

[0029] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0030] Figure 3 It is a schematic diagram of the structural decomposition of the present invention;

[0031] Figure 4 It is a top view of the local structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the height adjustment state of the power rod of the present invention;

[0033] Figure 6 It is a three-dimensional diagram showing the use state of the present invention;

[0034] Figure 7 This is a layout diagram of the device of the present invention installed along the bridge during top-pushing construction;

[0035] Figure 8 for Figure 7 AA section view;

[0036] Fig. 9 It is the work flow chart of the present invention.

[0037] Among them, 1. base; 2. support; 3. power rod; 4. ring track; 5. rotating ring; 6. first gear; 7. driving motor; 8. second gear; 9. tray. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Please see attached Figure 1 -Attached Fig. 9The present invention provides a self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge, which includes two groups of self-rotating jacking devices, each group consisting of four minimum units, which has the characteristics of low cost, low energy consumption, little damage to the beam body, continuous advancement, and small offset, and is suitable for the construction of the upper structure of an assembled large-span steel-concrete composite beam bridge. Its minimum unit includes: a base 1, which is used to support the entire device, and a vertical adjustment power component with adjustable height is installed on the upper part of the base, and a rotating component is installed on the top of the vertical adjustment power component, and a tray 9 for contacting the beam bridge is installed on the upper part of the base 1. A layer of high-strength rubber pad is set on the surface of the tray 9, and its main function is to ensure that the tray 9 will not cause damage to the beam body when it contacts the beam body, and play a buffering role;

[0040] Before construction, two sets of self-rotating intelligent continuous pushing devices are prepared for the pushing of the beam bridge. Each set is equipped with four pushing devices, which is the smallest unit. Each pushing device also includes four power rods 3 with adjustable height. The top of the power rod 3 is movably connected to the bottom of the circular track 4, and the bottom of the four power rods 3 is movably installed around the upper part of the support 2, which is used to provide an installation position for the four power rods 3. At the bottom of the support 2, a base 1 for increasing the support area of ​​the device is installed;

[0041] By adjusting the power rod 3 perpendicular to the plane of the circular track 4, the inclination angle of the circular track 4 can be changed. At the upper outer ring of the circular track 4, a rotating ring 5 is rotatably connected. Its main function is to provide auxiliary support for the lower four sides of the pallet 9. In the middle of the circular track 4, a first gear 6 is installed. A driving motor 7 is also installed on one side of the middle of the circular track 4. The output end of the driving motor 7 is fixedly connected to a second gear 8 meshing with the first gear 6. The second gear 8 is used to drive the pallet 9 fixedly connected thereto to rotate, thereby generating a rotational friction force. By cooperating with two sets of self-rotating lifting devices to alternately change the inclination angle of the pallet 9, the beam body is pushed to perform continuous advancement with a small offset.

[0042] In this device, the main function of the power rod 3 is to lift the beam body, and at the same time, the inclination angle of the tray 9 can be adjusted by adjusting the telescopic degree of different power rods 3;

[0043] Specifically, the rotating member drives the tray 9 to change the tilt angle under the adjustment of the vertical adjustment power member. During construction, the tray 9 changes its tilt angle alternately to the left and right. At the same time, the driving motors 7 in the two sets of self-rotating jacking devices are alternately started to rotate forward and reverse, driving the tray 9 to rotate counterclockwise or clockwise. The beam body in contact with the rubber pad on the surface of the tray 9 is continuously pushed forward under the action of the rotating friction force.

[0044] Furthermore, in the present invention, the inclination angle of the tray 9 is determined according to the propulsion direction, the inclination angle is the same, and the maximum does not exceed 45°, and the extension and retraction degrees of the four power rods 3 in each group of devices remain consistent.

[0045] Please see attached Figure 5 -Attached Figure 6 As shown, the angle of the tray 9 is changed by adjusting four height-adjustable power rods 3, so that the predetermined contact surface of the tray 9 contacts the bottom surface of the beam body. The tray 9 is tightly mounted on the rotating ring 5. The mounting method can be bonding or fixing with a special nut, and the size of the tray 9 matches the rotating ring 5. The first gear 6 in this device drives the tray 9 to rotate. The thickness of the tray 9 can be matched according to the length and weight of the pushing beam body to avoid damage to the beam body.

[0046] The device of the present invention will be further described below in conjunction with specific embodiments:

[0047] Please see attached Fig. 9 The specific working principle of the self-rotating intelligent continuous pushing device provided in this embodiment is as follows:

[0048] The first step is to divide the smallest units in the device into two groups, with four in each group installed on the bridge piers or temporary support devices, and then set the beam body on the top of the device;

[0049] Step 2: Adjust the height of the power rod 3 in the device to adjust the angle of the tray in each minimum unit to 30° to the left. The power rod 3 is a hydraulic rod, a jack or other device with a pushing function, which is an existing component in the field. In this embodiment, the power rod 3 is a jack.

[0050] The third step is to install the displacement measuring point on the beam body, and then input the theoretical displacement value of the measuring point into the Beidou displacement automatic acquisition receiving device terminal, which is the terminal Beidou remote displacement measurement system, the system model is: JMBD-1050, the dynamic positioning plane accuracy is: ±8mm, in this embodiment, it is used as an automatic positioning device for the beam bridge;

[0051] Step 4: Adjust the displacement acquisition frequency of the measuring point according to formula 1:

[0052]

[0053] In formula 1, f is the displacement acquisition frequency (Hz); is the maximum allowable deviation of the beam along the bridge direction (m), r is the radius of the tray 9 of the device (m); ω is the angular velocity of the tray 9 driven by the first gear 6 (rad / s). When the data acquisition frequency of the measuring point satisfies formula 1, the automatic positioning device in this embodiment is running. If it does not satisfy formula 1, the value of the acquisition frequency f is increased until f is greater than or equal to The automatic positioning device starts working;

[0054] Step 5. When the automatic positioning device starts to run, the power device in the device starts to operate. In this embodiment, the power device is the rotating member mentioned in the above content. The rotating member is equipped with a controller. The controller is electrically connected to the drive motor 7, and the drive motor 7 can be adjusted to rotate forward or reverse. At the same time, corresponding forward rotation control buttons and reverse rotation control buttons are also provided. In specific operation, the displacement of each measuring point needs to satisfy Formula 2:

[0055] ω1≤r2ω / r1 Formula 2

[0056] In formula 2, ω1 is the angular velocity of the second gear, (rad / s); r1 is the rotation radius of the second gear, (m); r2 is the rotation radius of the first gear, (m);

[0057] In this process, first, by pressing the forward rotation control button, the controller starts the forward rotation of the drive motor 7 in each minimum unit, driving the tray to rotate counterclockwise, so that the beam body moves forward to the left. During the forward movement, the Beidou displacement automatic acquisition and receiving device terminal will compare the actual displacement value of the beam bridge collected with the theoretical displacement value. When the measuring point position does not satisfy Formula 2, the reverse rotation control button is started to reverse the drive motor 7, so that the beam body returns to the theoretical offset position.

[0058] Step 6. After the beam is pushed to the preset pushing position, the height of the jack in the smallest unit is adjusted to drive the tray 9 to tilt to the right. At this time, the forward rotation control button is turned on to send a signal to the controller, and the controller starts the reverse rotation of the drive motor to drive the tray to rotate clockwise, so that the beam moves forward to the right. During this process, the Beidou displacement automatic acquisition and receiving equipment terminal maintains the same working state as the above process, and compares the actual displacement value of the beam bridge collected with the theoretical displacement value. When the measuring point position does not satisfy Formula 2, the reverse rotation control button is turned on to reverse the drive motor 7, drive the tray 9 to rotate counterclockwise, and then return the beam to the theoretical offset position.

[0059] Step 7: When the beam is pushed to the final position, the relative difference with the theoretical position satisfies the standard

[0060] The formula is as follows:

[0061]

[0062] In formula (3), is the difference between the horizontal displacement of the i-th measuring point in the transverse direction of the bridge and the theoretical value, (m); is the maximum allowable deviation value of the beam body in the transverse direction, (m). When the deviation value of the beam body in the transverse direction is less than the maximum allowable deviation value, the construction can be ended. When the deviation value of the beam body in the transverse direction is greater than the maximum allowable deviation value, the reverse rotation control button is started again to reverse the drive motor 7 and drive the tray 9 to rotate, so that the beam body is displaced and its transverse deviation value is adjusted until formula (3) is satisfied, and the construction can be ended.

[0063] Furthermore, an embodiment of the present invention also provides a jacking method for a self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge, comprising the following method steps:

[0064] S1, such as Figure 7 As shown, before construction, it is necessary to install the smallest unit of the two sets of self-rotating jacking devices on the bridge pier or temporary support device, and adjust the preset angle of the smallest unit to complete the preparation work;

[0065] S2. Install the automatic positioning device: Set displacement measuring points on the beam body. Before the jacking construction, input the theoretical displacement value of the measuring point into the Beidou displacement automatic acquisition receiving device terminal Beidou remote displacement measurement system JMBD-1050. The dynamic positioning plane accuracy is: ±8mm;

[0066] In this step, the displacement acquisition frequency needs to satisfy equation 1:

[0067]

[0068] In formula 1, f is the acquisition frequency of beam displacement (Hz); is the maximum allowable deviation of the beam along the bridge direction (m); r is the radius of the tray 9 of the device (m); ω is the angular velocity of the first gear 6 driving the tray 9 to rotate (rad / s);

[0069] S3, jacking construction: alternately start the driving motors in the minimum units of the two sets of self-rotating jacking devices to drive the second gear to rotate, so that the first gear drives the tray 9 with a rubber pad on the surface to rotate, and under the action of the rotating friction force, the beam body is alternately and continuously pushed forward. In this step, when the beam bridge is pushed forward, the actual displacement value of the measuring point is collected in real time through the Beidou displacement automatic collection and receiving device, and the data is compared according to the actual displacement value and the theoretical displacement value of the beam bridge, and the operating state of the device is adjusted. The operating state specifically refers to the tilt direction, angle and rotation direction of the tray 9;

[0070] In this step, the displacement of each measuring point must satisfy equation 2:

[0071] ω1≤r2ω / r1 Formula 2

[0072] In formula 2, ω1 is the angular velocity of the second gear, (rad / s); r1 is the rotation radius of the second gear, (m); r2 is the rotation radius of the first gear, (m); is the difference between the horizontal displacement of the i-th measuring point in the transverse direction of the bridge and the theoretical value, (m); is the maximum allowable deviation of the beam in the transverse direction of the bridge, (m);

[0073] S4, displacement adjustment: when the measured horizontal maximum displacement in the transverse direction exceeds the maximum allowable deviation value of the beam in the transverse direction When the control device performs reverse operation, the relative difference between the final position of the beam and the theoretical position satisfies Formula 3, and the jacking construction is completed.

[0074] In this step, the test results of each displacement measurement point should satisfy Formula 3.

[0075]

[0076] In formula 3, is the difference between the horizontal displacement of the i-th measuring point in the transverse direction of the bridge and the theoretical value, (m); It is the maximum allowable deviation of the beam in the transverse direction of the bridge, (m).

[0077]

[0078] In formula (4), is the difference between the horizontal displacement of the ith measuring point along the bridge and the theoretical value, (m).

[0079] By performing the above steps, the device can accurately, quickly and safely push the prefabricated beam to the predetermined position. The vertically adjustable power component with adjustable height can push the beam with a small offset by adjusting the angle of the elliptical high-strength tray 9, and can achieve continuous advancement during the entire construction process. The rubber pad on the surface of the elliptical high-strength tray 9 can effectively protect the beam from damage, thereby ensuring the construction quality while improving the construction progress. The device as a whole has good application value.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge, comprising two groups of self-rotating jacking devices, each group consisting of four minimum units, characterized in that: The smallest unit includes: A base (1) for supporting the entire device body, with a height-adjustable vertical power component installed on the upper part; A rotating member, which is mounted on the upper part of the vertical adjustment power member and is used to drive a tray (9) mounted on the upper part thereof to rotate, wherein a rubber pad is provided on the surface of the tray (9) for buffering contact with the beam bridge; The rotating member changes the tilt angle of the tray (9) under the adjustment of the vertical adjustment power member. In all the smallest units, the tilt angle of the tray (9) is the same and less than 45°. During construction, the tray (9) changes its tilt angle alternately to the left and right. At the same time, the driving motors (7) in the two sets of self-rotating jacking devices are alternately started to rotate forward and reverse, thereby driving the tray (9) to rotate counterclockwise or clockwise. The beam body in contact with the rubber pad on the surface of the tray (9) is alternately continuously pushed forward under the action of the rotating friction force.

2. The self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge according to claim 1 is characterized in that: The vertical adjustment power component comprises a support (2) fixedly mounted on the top of a base (1); an annular track (4) is also arranged on the upper part of the support (2); a plurality of power rods (3) are movably mounted around the upper part of the support (2); and the tops of the rod bodies of the plurality of power rods (3) are movably mounted around the bottom of the annular track (4).

3. The self-rotating intelligent continuous jacking device for a steel-concrete composite beam bridge according to claim 1 is characterized in that: The rotating member comprises a rotating ring (5) rotatably connected to the top of the circular track (4); a first gear (6) is rotatably mounted in the middle of the circular track (4); the tray (9) is mounted on the upper part of the first gear (6); a driving motor (7) is also mounted on one side of the middle of the circular track (4); a second gear (8) meshingly connected to the first gear (6) is fixedly connected to the output end of the driving motor (7) for driving the tray (9) fixedly connected thereto to rotate.

4. The method for pushing a steel-concrete composite beam bridge using a self-rotating intelligent continuous pushing device according to claim 3 is characterized in that: The method comprises the following steps: S1. Installation of the device: First, install the smallest unit of the two sets of self-rotating jacking devices on the bridge pier or temporary support device, and adjust the preset angle of the smallest unit to complete the preparation work; S2. Install the automatic positioning device: Before construction, set multiple displacement measuring points on the prefabricated beam, and input the theoretical displacement values ​​of the measuring points into the Beidou displacement automatic acquisition receiving device terminal; S3, jacking construction: alternately start the driving motors (7) in the two sets of the smallest units of the self-rotating jacking device to drive the second gear (8) to rotate, so that the first gear (6) drives the tray (9) with a rubber pad on the surface to rotate, and under the action of the rotating friction force, the beam body is alternately and continuously pushed forward; S4, displacement adjustment: When the measured horizontal maximum displacement in the transverse direction exceeds the maximum allowable deviation value of the beam in the transverse direction Δ Hu When the control device is turned on, the control device performs reverse operation until the relative difference between the final position of the beam and the theoretical position satisfies formula (3), and the jacking construction is completed.

5. The method for pushing with a self-rotating intelligent continuous pushing device for a steel-concrete composite beam bridge according to claim 4 is characterized in that: In the step S2, the Beidou displacement automatic acquisition receiving device terminal automatically acquires the displacement values ​​of each measuring point of the beam body during the jacking process in real time, and the displacement acquisition frequency satisfies the following formula: In formula (1), f is the beam displacement acquisition frequency (Hz); is the maximum allowable deviation value of the beam along the bridge direction (m); r is the radius of the tray (9) of the device (m); ω is the angular velocity (rad / s) at which the first gear (6) drives the tray (9) to rotate.

6. The method for pushing with a self-rotating intelligent continuous pushing device for a steel-concrete composite beam bridge according to claim 4 is characterized in that: In the step S3, when the beam bridge is pushed forward, the actual displacement value of the measuring point is collected in real time through the Beidou displacement automatic collection and receiving device, and data comparison is made according to the actual displacement value and theoretical displacement value of the beam bridge to adjust the operating state of the device. The displacement of each measuring point during the pushing process must satisfy the following formula: ω1≤r2ω / r1 Formula (2) In formula (2), ω1 is the rotation angular velocity of the second gear (8), (rad / s); r1 is the rotation radius of the second gear (8), (m); and r2 is the rotation radius of the first gear (6), (m).

7. The method for pushing with a self-rotating intelligent continuous pushing device for a steel-concrete composite beam bridge according to claim 4 is characterized in that: In the step S4, the relative difference between the final position of the beam and the theoretical position satisfies the following formula: In formula (3), is the difference between the horizontal displacement of the i-th measuring point in the transverse direction of the bridge and the theoretical value, (m); is the maximum allowable deviation of the beam in the transverse direction of the bridge, (m); in formula (4), is the difference between the horizontal displacement of the ith measuring point along the bridge and the theoretical value, (m).

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