Method and device for positioning gravity center of super-wide asymmetric curve bridge in swivel construction

Abstract

The application discloses a center of gravity positioning method and device for an ultra-wide asymmetric curve bridge in swivel construction, and belongs to the field of bridge swivel construction. Z and the unbalanced moment M G of the bridge structure, the eccentricity Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained according to the friction moment of the spherical hinge and the unbalanced moment of the bridge structure; based on the eccentricity Δx and Δy, a rectangular coordinate system X', Y' is re-established with the center of the spherical hinge as the origin, the bridge structure weighing experiment is carried out, and the eccentricity Δx' and Δy' of the target bridge in the X' and Y' directions are obtained; whether the deviation of the eccentricity Δx' and Δy' and the eccentricity Δx and Δy meets the accuracy requirement is judged, if yes, the center of gravity coordinates of the target bridge are obtained, the center of gravity position of the ultra-wide asymmetric curve bridge can be quickly positioned, and convenience is provided for the bridge swivel construction.

Description

Technical Field

[0001] This invention belongs to the field of bridge rotation construction, specifically relating to a method and device for positioning the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction. Background Technology

[0002] Rapid urbanization and the booming development of transportation have resulted in a complex network of transportation routes. To minimize the impact on the operation of existing transportation lines, bridge rotation is one of the optimal construction methods for bridges spanning existing lines. However, as the span and tonnage of bridges increase, the difficulty of bridge rotation construction also increases significantly, and the location of the bridge's structural center of gravity becomes difficult to determine.

[0003] In the process of developing this invention, the inventors discovered at least the following problems in the prior art: Currently, the center of gravity of a bridge structure is mainly determined by conducting weighing tests on the bridge structure. However, when encountering the rotation construction of ultra-wide asymmetrical curved bridges, the traditional weighing test method is no longer applicable, which will inevitably affect the smooth progress of subsequent rotation construction of such complex bridges.

[0004] In summary, there is an urgent need for a method that can accurately locate the center of gravity of ultra-wide asymmetric curved bridges to facilitate subsequent rotation construction of such bridges. Summary of the Invention

[0005] The purpose of this invention is to provide a method and apparatus for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction, which can solve the problem that traditional weighing test methods in the prior art are inconvenient for locating the center of gravity of ultra-wide asymmetric curved bridges.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a method for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction, the method comprising:

[0008] Step S100: Establish a rectangular coordinate system X and Y with the center of the ball joint as the origin, and conduct a bridge structure weighing experiment based on the ball joint rotation method;

[0009] Step S200: Obtain the frictional torque M of the ball joint of the target bridge. Z and the unbalanced moment M of the bridge structure G The eccentricities Δx and Δy of the target bridge in the X and Y directions are obtained based on the frictional torque of the ball joint and the unbalanced torque of the bridge structure.

[0010] Step S300: Based on the eccentricities Δx and Δy, a new rectangular coordinate system X' and Y' is established with the center of the ball joint as the origin. A bridge structure weighing experiment is conducted to obtain the eccentricities Δx' and Δy' in the X' and Y' directions of the target bridge.

[0011] Step S400: Determine whether the deviations of the eccentricities Δx' and Δy' from Δx and Δy meet the accuracy requirements. If they do, the coordinates of the target bridge's center of gravity are obtained.

[0012] Preferably, step S200 includes:

[0013] Step S201: Release the sandbox constraints and compare the frictional torque M of the ball joint of the target bridge. Z and the unbalanced moment M of the bridge structure G ;

[0014] Step S202, if M Z >M G Then, jacks and displacement dial gauges are respectively arranged on both sides of the X-axis and Y-axis of the rectangular coordinate system; if M Z <M G Determine the position of the target bridge's center of gravity in a rectangular coordinate system, and place jacks and displacement dial gauges along the two semi-axis directions adjacent to the quadrant.

[0015] Step S203: Apply a jacking force P to the jack and record the distance L from the jacking force to the origin of the rectangular coordinate system using a displacement dial indicator;

[0016] Step S204: Adjust the jack from the preset pressing state to the critical pressing state to obtain the critical displacement value;

[0017] Step S205: Based on the torque calculation formula, obtain the eccentricities Δx and Δy of the target bridge along the X and Y axes of the rectangular coordinate system.

[0018] Preferably, step S202 includes:

[0019] If the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, then jacks and displacement dial gauges are arranged on the left side of the X-axis and the right side of the Y-axis in the quadrant.

[0020] If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, then jacks and displacement dial gauges shall be placed to the left of the X-axis and Y-axis in the quadrant in which the bridge is located.

[0021] If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, then jacks and displacement dial gauges shall be arranged on the right side of the X-axis and the left side of the Y-axis in the quadrant in which it is located.

[0022] If the center of gravity of the target bridge is located in the fourth quadrant of the rectangular coordinate system, then jacks and displacement dial gauges are arranged to the right of the X-axis and the right of the Y-axis in the quadrant.

[0023] Preferably, step S203 includes:

[0024] When M Z >M G At that time, firstly, apply a jacking force Py to the left and right jacks in the Y direction respectively. 左 ,Py 右 The top force Py was recorded using a displacement percentage gauge. 左 ,Py 右 Distance Ly to the origin of the rectangular coordinate system 左 Ly 右 Secondly, a jacking force Px is applied to the left and right jacks in the X direction respectively. 左 Px 右 The top force Px was recorded using a displacement percentage gauge. 左 Px 右 Distance Lx to the origin of the rectangular coordinate system 左 Lx 右 ;

[0025] When M Z <M G At that time, the jacks on the down-moving side of the support feet in the X-axis direction and the down-moving side of the support feet in the Y-axis direction of the rectangular coordinate system are provided with jacking forces Px and Py respectively, and the distances Lx and Ly from the jacking forces Px and Py to the origin of the rectangular coordinate system are recorded by the displacement percentage gauge.

[0026] Preferably, step S204 includes:

[0027] Starting from the preset jacking state, the jacking force is gradually increased according to the preset jacking force increment. It is then determined whether the target bridge has reached the critical state. If so, the jacking force is stopped, and the critical jacking force and critical displacement value of the jack at this time are recorded.

[0028] Preferably, the equilibrium equation is:

[0029]

[0030] M G =G×e

[0031] Among them, M G For the unbalanced moment of the bridge structure, M Z Let G be the frictional torque of the ball joint, G be the weight of the target bridge, e be the eccentricity of the target bridge along the X and Y axes of the rectangular coordinate system, and Py be the torque of the ball joint. 右1 The critical jacking force of the jack on the right side of the Y-axis, Ly 右1 The critical displacement value of the jack on the right side of the Y-axis, Py 左1 The critical jacking force of the jack on the left side of the Y-axis, Ly 左1 The critical displacement value of the jack on the left side of the Y-axis, Px 右1 The critical jacking force of the jack on the right side of the X-axis, Lx 右1Px represents the critical displacement value of the jack on the right side of the X-axis. 左1 The critical jacking force of the jack on the left side of the X-axis, Lx 左1 Py1 is the critical displacement value of the left jack on the X-axis, Ly1 is the first critical jacking force of the jack on the down-side of the Y-axis support foot, Py2 is the second critical jacking force of the jack on the down-side of the Y-axis support foot, Ly2 is the second critical displacement value of the jack on the down-side of the Y-axis support foot, Px1 is the critical jacking force of the jack on the down-side of the X-axis support foot, Lx1 is the critical displacement value of the jack on the down-side of the X-axis support foot, Px2 is the second critical jacking force of the jack on the down-side of the X-axis support foot, Lx2 is the second critical displacement value of the jack on the down-side of the X-axis support foot.

[0032] Preferably, step S400 includes:

[0033] According to the formula Δx' and Δy' are checked, where T1 is the eccentricity error value of the target bridge in the X-axis direction and T2 is the eccentricity error value of the target bridge in the Y-axis direction.

[0034] Determine whether T1 and T2 meet the accuracy requirements. If not, repeat step S300 until the accuracy requirements are met; if they are met, take the centroid coordinates of the target bridge as...

[0035] Preferably, the accuracy requirement is that both T1 and T2 are less than 5%.

[0036] Secondly, embodiments of the present invention provide a center-of-gravity positioning device for ultra-wide asymmetric curved bridges constructed by rotation, the device comprising:

[0037] Weighing Experiment Module: Used to establish a rectangular coordinate system X and Y with the center of the ball joint as the origin, and to conduct weighing experiments on bridge structures based on the ball joint rotation method;

[0038] First acquisition module: used to acquire the frictional torque of the ball joint of the target bridge and the unbalanced torque of the bridge structure, and to obtain the eccentricity Δx and Δy of the target bridge in the X-axis and Y-axis directions based on the frictional torque of the ball joint and the unbalanced torque of the bridge structure;

[0039] The second acquisition module is used to re-establish a rectangular coordinate system X' and Y' with the center of the ball joint as the origin based on the eccentricity Δx and Δy, and obtain the eccentricity Δx' and Δy' of the target bridge in the X' and Y' directions;

[0040] Center of gravity confirmation module: used to determine whether the eccentricity Δx' and Δy' meet the accuracy requirements. If they do, the center of gravity coordinates of the target bridge are obtained.

[0041] In this embodiment of the invention, the method for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction provided by the present invention has the following beneficial effects: First, a rectangular coordinate system X and Y is established with the center of the ball joint as the origin, and a bridge structure weighing experiment is conducted based on the ball joint rotation method. The frictional torque M of the ball joint of the target bridge is obtained by... Z and the unbalanced moment M of the bridge structure G By combining the equilibrium equations, the eccentricities Δx and Δy in the X and Y directions of the target bridge are obtained. Based on these eccentricities Δx and Δy, a new rectangular coordinate system X' and Y' is established with the center of the ball joint as the origin. The bridge structure weighing experiment is then repeated to obtain the eccentricities Δx' and Δy' in the X and Y directions of the target bridge. The error of the eccentricities Δx' and Δy' is judged. If the error is within the accuracy requirements, the coordinates of the center of gravity of the target bridge are obtained. This ensures the reliability and accuracy of the determination of the center of gravity position, solves the problem that traditional weighing experiment methods cannot quickly and accurately determine the center of gravity position of ultra-wide asymmetric curved bridges, and provides accurate center of gravity data for operations such as the rotation construction of ultra-wide asymmetric curved bridges. This greatly improves the safety and stability of construction, reduces construction risks, and ensures the high quality and efficiency of bridge rotation construction operations. Attached Figure Description

[0042] Figure 1 This is a flowchart of a method for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction, according to an embodiment of the present invention.

[0043] Figure 2 This is a rectangular coordinate system X and Y schematic diagram of a method for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction according to an embodiment of the present invention.

[0044] Figure 3 For M Z >M G At that time, a schematic diagram of the left-side lifting in the Y-axis direction;

[0045] Figure 4 For M Z >M G At that time, a schematic diagram of the lifting on the right side in the Y-axis direction;

[0046] Figure 5 For M Z <M G At that time, a schematic diagram of the lifting on the right side in the Y-axis direction;

[0047] Figure 6 For M Z <M G At that time, a schematic diagram of unloading and lifting on the right side in the Y-axis direction;

[0048] Figure 7This is a schematic diagram of the rectangular coordinate system X' and Y' of a method for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction according to an embodiment of the present invention.

[0049] Figure 8 This is an overall operation flowchart of a method for positioning the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction, according to an embodiment of the present invention.

[0050] Figure 9 This is a structural block diagram of a center-of-gravity positioning device for an ultra-wide asymmetric curved bridge constructed by rotation, according to an embodiment of the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] The terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0053] The following description, in conjunction with the accompanying drawings, details a method and apparatus for center-of-gravity positioning of an ultra-wide asymmetric curved bridge under rotation construction, provided by the present invention, through specific embodiments and application scenarios.

[0054] Please see Figure 1 , Figure 1 The flowchart illustrates the implementation of a method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge under rotation construction, as provided in an embodiment of the present invention.

[0055] Step S100: Establish a rectangular coordinate system X and Y with the center of the ball joint as the origin, and conduct a bridge structure weighing experiment based on the ball joint rotation method;

[0056] Please see Figure 2 By establishing a rectangular coordinate system with the center of the ball joint as the origin for the bridge structure weighing experiment, a clear reference system is provided for subsequent measurements and calculations, making the measurement and calculation of various parameters more accurate.

[0057] Step S200: Obtain the frictional torque M of the ball joint of the target bridge. Zand the unbalanced moment M of the bridge structure G The eccentricities Δx and Δy of the target bridge in the X and Y directions are obtained based on the frictional torque of the ball joint and the unbalanced torque of the bridge structure.

[0058] Specifically, in step S201, the sandbox constraints are released, and the frictional torque M of the ball joint of the target bridge is compared. Z and the unbalanced moment M of the bridge structure G ;

[0059] Step S202, if M Z >M G Then, jacks and displacement dial gauges are respectively arranged on both sides of the X-axis and Y-axis of the rectangular coordinate system; if M Z <M G Determine the position of the target bridge's center of gravity in a rectangular coordinate system, and place jacks and displacement dial gauges along the two semi-axis directions adjacent to the quadrant.

[0060] Specifically, if the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, then jacks and displacement dial gauges are arranged on the left side of the X-axis and the right side of the Y-axis in the quadrant in which it is located.

[0061] If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, then jacks and displacement dial gauges shall be placed to the left of the X-axis and Y-axis in the quadrant in which the bridge is located.

[0062] If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, then jacks and displacement dial gauges shall be arranged on the right side of the X-axis and the left side of the Y-axis in the quadrant in which it is located.

[0063] If the center of gravity of the target bridge is located in the fourth quadrant of the rectangular coordinate system, then jacks and displacement dial gauges are arranged to the right of the X-axis and the right of the Y-axis in the quadrant.

[0064] By comparing the frictional torque of the ball joint with the unbalanced torque of the bridge structure, the state of the bridge can be accurately determined, providing an accurate basis for the placement of jacks, thereby improving the accuracy of eccentricity calculation, determining the offset of the bridge structure's center of gravity, and then using counterweights to shift the bridge structure's center of gravity to the center position of the ball joint, providing a guarantee for subsequent rotation construction work.

[0065] Step S203: Apply a jacking force P to the jack and record the distance L from the jacking force to the origin of the rectangular coordinate system using a displacement dial indicator;

[0066] Specifically, when M Z >M G At that time, firstly, apply a jacking force Py to the left and right jacks in the Y direction respectively. 左 ,Py 右The top force Py was recorded using a displacement percentage gauge. 左 ,Py 右 Distance Ly to the origin of the rectangular coordinate system 左 Ly 右 Secondly, a jacking force Px is applied to the left and right jacks in the X direction respectively. 左 Px 右 The top force Px was recorded using a displacement percentage gauge. 左 Px 右 Distance Lx to the origin of the rectangular coordinate system 左 Lx 右 ;

[0067] When M Z <M G At that time, the jacks on the down-moving side of the support feet in the X-axis direction and the down-moving side of the support feet in the Y-axis direction of the rectangular coordinate system are provided with jacking forces Px and Py respectively, and the distances Lx and Ly from the jacking forces Px and Py to the origin of the rectangular coordinate system are recorded by the displacement percentage gauge.

[0068] It should be noted that the side of the support foot that moves down can be the left or right side in the X-axis or Y-axis direction. In this invention, the left side of the X-axis is defined as the positive half-axis direction of the Y-axis, the right side of the X-axis is defined as the negative half-axis direction of the Y-axis, the left side of the Y-axis is defined as the negative half-axis direction of the X-axis, and the right side of the Y-axis is defined as the positive half-axis direction of the X-axis. The specific direction needs to be determined according to the position of the center of gravity.

[0069] Step S204: Adjust the jack from the preset pressing state to the critical pressing state to obtain the critical displacement value;

[0070] Specifically, the jack is started from a preset jacking state and the jacking force is gradually increased according to a preset jacking force increment, wherein the preset jacking force increment is 1MPa / level. It is then determined whether the target bridge has reached a critical state. If so, the jacking force is stopped and the critical jacking force and critical displacement value of the jack at this time are recorded.

[0071] Setting the preset jacking force increment to 1MPa / level and gradually increasing the jacking force while judging the critical state can effectively avoid damage to the bridge structure due to excessive jacking force and ensure the safety of the bridge during the measurement process.

[0072] It should be noted that you should refer to [link / reference]. Figures 3 to 4 , Figures 3 to 4 For M Z >M G A schematic diagram showing the lifting operation on both the left and right sides along the Y-axis. When M... Z >M G At that time, the displacement percentage gauge recorded Ly 左Then, gradually increase the jacking force of the left-side jack in the Y direction from the initial jacking state according to the preset jacking force increment; determine whether the left-side jack in the Y direction has reached the critical state. If so, stop increasing the jacking force and record the jacking force Py at this time. 左1 and the corresponding critical displacement value Ly 左1 Unload the left jack in the Y direction and apply jacking force to the right jack in the Y direction. 右 Record this Py code. 右 Distance Ly to the origin of the rectangular coordinate system 右 The jack on the right side in the Y direction is gradually increased from its initial pressing state according to a preset force increment. It is then determined whether the jack on the right side in the Y direction has reached a critical state. If so, the force increase is stopped, and the force Py of the jack at this point is recorded. 右1 and the corresponding critical displacement value Ly 右1 ;

[0073] The displacement percentage gauge recorded at Lx 左 Then, gradually increase the jacking force of the left-side jack in the X direction from the initial jacking state according to the preset jacking force increment; determine whether the left-side jack in the X direction has reached the critical state. If so, stop increasing the jacking force and record the jacking force Px at this time. 左1 and the corresponding critical displacement value Lx 左1 Unload the left jack in the X direction and apply a jacking force Px to the right jack in the X direction. 右 Record Px at this time 右 Distance Lx to the origin of the rectangular coordinate system 右 The jack on the right side in the X direction is gradually increased from its initial pressing state according to a preset jacking force increment. It is then determined whether the jack on the right side in the X direction has reached a critical state. If so, the jacking force is stopped, and the jacking force Px at this point is recorded. 右1 and the corresponding critical displacement value Lx 右1 ;

[0074] When M Z <M G There are four scenarios, and different measures are taken for each scenario:

[0075] Scenario 1: If the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, then jacks and displacement gauges should be placed to the left of the X-axis and to the right of the Y-axis in that quadrant. Please refer to [reference needed]. Figures 5 to 6 , Figures 5 to 6 For M Z <M GThe diagram illustrates the lifting and unloading / lowering process on the right side of the Y-axis. After the displacement percentage gauge records the value at Ly, the jack on the right side of the Y-axis is gradually increased from its initial pressing state according to a preset jacking force increment. It is then determined whether the target bridge has reached the first critical state, which is when the bridge structure slides. If so, the jacking force is stopped, and the first critical jacking force Py1 and the corresponding first critical displacement value Ly1 are recorded. The jack on the right side of the Y-axis is then unloaded, and it is determined whether the target bridge has reached the second critical state, which is when the bridge structure slides in the opposite direction. If so, the second critical jacking force Py2 and the corresponding second critical displacement value Ly2 are recorded.

[0076] After the displacement percentage gauge records Lx, the left-side jack in the X direction is gradually increased from the initial jacking state according to the preset jacking force increment; it is determined whether the target bridge has reached the first critical state. If so, the jacking force is stopped, and the jacking force Px1 and the corresponding first critical displacement value Lx1 are recorded; the left-side jack in the X direction is unloaded, and it is determined whether the target bridge has reached the second critical state. If so, the second critical jacking force Px2 and the corresponding second critical displacement value Lx2 are recorded.

[0077] Scenario 2: If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, then jacks and displacement percentage gauges are placed on the left side of the X-axis and Y-axis in the quadrant. After the displacement percentage gauges record the value at Ly, the jacks on the left side of the Y-axis are gradually increased from the initial pressing state according to the preset jacking force increment. It is determined whether the target bridge has reached the first critical state, which is when the bridge structure slides. If so, the jacking force is stopped, and the first critical jacking force Py1 and the corresponding first critical displacement value Ly1 are recorded. The jacks on the left side of the Y-axis are unloaded, and it is determined whether the target bridge has reached the second critical state, which is when the bridge structure slides in the opposite direction. If so, the second critical jacking force Py2 and the corresponding second critical displacement value Ly2 are recorded.

[0078] After the displacement percentage gauge records Lx, the left-side jack in the X direction is gradually increased from the initial jacking state according to the preset jacking force increment; it is determined whether the target bridge has reached the first critical state. If so, the jacking force is stopped, and the jacking force Px1 and the corresponding first critical displacement value Lx1 are recorded; the left-side jack in the X direction is unloaded, and it is determined whether the target bridge has reached the second critical state. If so, the second critical jacking force Px2 and the corresponding second critical displacement value Lx2 are recorded.

[0079] Scenario 3: If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, then jacks and displacement percentage gauges are placed on the right side of the X-axis and the left side of the Y-axis in the quadrant. After the displacement percentage gauges record the value at Ly, the jacks on the left side of the Y-axis are gradually increased from the initial pressing state according to the preset jacking force increment. It is determined whether the target bridge has reached the first critical state, which is when the bridge structure slides. If so, the jacking force is stopped, and the first critical jacking force Py1 and the corresponding first critical displacement value Ly1 are recorded. The jacks on the left side of the Y-axis are unloaded, and it is determined whether the target bridge has reached the second critical state, which is when the bridge structure slides in the opposite direction. If so, the second critical jacking force Py2 and the corresponding second critical displacement value Ly2 are recorded.

[0080] After the displacement percentage gauge records Lx, the jack on the right side in the X direction is gradually increased from the initial jacking state according to the preset jacking force increment; it is determined whether the target bridge has reached the first critical state. If so, the jacking force is stopped, and the jacking force Px1 and the corresponding first critical displacement value Lx1 are recorded; the jack on the right side in the X direction is unloaded, and it is determined whether the target bridge has reached the second critical state. If so, the jacking force Px2 and the corresponding second critical displacement value Lx2 are recorded.

[0081] Scenario 4: If the center of gravity of the target bridge is located in the fourth quadrant of the rectangular coordinate system, then jacks and displacement percentage gauges are placed on the right side of the X-axis and the right side of the Y-axis in the quadrant. After the displacement percentage gauges record the value at Ly, the jacks on the right side of the Y-axis are gradually increased from the initial pressing state according to the preset jacking force increment. It is determined whether the target bridge has reached the first critical state, which is when the bridge structure slides. If so, the jacking force is stopped, and the first critical jacking force Py1 and the corresponding first critical displacement value Ly1 are recorded. The jacks on the right side of the Y-axis are unloaded, and it is determined whether the target bridge has reached the second critical state, which is when the bridge structure slides in the opposite direction. If so, the second critical jacking force Py2 and the corresponding second critical displacement value Ly2 are recorded.

[0082] After the displacement percentage gauge records Lx, the jack on the right side in the X direction is gradually increased from the initial jacking state according to the preset jacking force increment; it is determined whether the target bridge has reached the first critical state. If so, the jacking force is stopped, and the jacking force Px1 and the corresponding first critical displacement value Lx1 are recorded; the jack on the right side in the X direction is unloaded, and it is determined whether the target bridge has reached the second critical state. If so, the jacking force Px2 and the corresponding second critical displacement value Lx2 are recorded.

[0083] By applying jacking force to the jacks and recording the distance to the origin of the rectangular coordinate system, and by gradually increasing the jacking force according to the preset jacking force increment and judging the critical state, the critical jacking force and critical displacement values ​​can be accurately obtained. These data provide a more accurate basis for subsequent eccentricity calculation, ultimately improving the measurement accuracy of the eccentricity Δx and Δy of the target bridge in the X and Y directions. In addition, by adopting different jacking arrangement schemes and operating procedures, it is possible to adapt to various different bridge conditions and ensure the smooth progress of the measurement process.

[0084] Step S205: Based on the torque calculation formula, obtain the eccentricities Δx and Δy of the target bridge along the X and Y axes of the rectangular coordinate system.

[0085] Specifically, the equilibrium equation is:

[0086]

[0087] M G =G×e

[0088] Among them, M G For the unbalanced moment of the bridge structure, M Z Let G be the frictional torque of the ball joint, G be the weight of the target bridge, e be the eccentricity of the target bridge along the X and Y axes of the rectangular coordinate system, and Py be the torque of the ball joint. 右1 The critical jacking force of the jack on the right side of the Y-axis, Ly 右1 The critical displacement value of the jack on the right side of the Y-axis, Py 左1 The critical jacking force of the jack on the left side of the Y-axis, Ly 左1 The critical displacement value of the jack on the left side of the Y-axis, Px 右1 The critical jacking force of the jack on the right side of the X-axis, Lx 右1 Px represents the critical displacement value of the jack on the right side of the X-axis. 左1 The critical jacking force of the jack on the left side of the X-axis, Lx 左1 Py1 is the critical displacement value of the left jack on the X-axis, Ly1 is the first critical jacking force of the jack on the down-side of the Y-axis support foot, Py2 is the second critical jacking force of the jack on the down-side of the Y-axis support foot, Ly2 is the second critical displacement value of the jack on the down-side of the Y-axis support foot, Px1 is the critical jacking force of the jack on the down-side of the X-axis support foot, Lx1 is the critical displacement value of the jack on the down-side of the X-axis support foot, Px2 is the second critical jacking force of the jack on the down-side of the X-axis support foot, Lx2 is the second critical displacement value of the jack on the down-side of the X-axis support foot.

[0089] Specifically, when M Z >M G When the eccentricity Δy of the target bridge along the Y-axis of the rectangular coordinate system is given, by solving the simultaneous equilibrium equations, we obtain M. G =(Py左1 Ly 左1 -Py 右1 Ly 右1 ) / 2, then according to M G =G×Δy, so Δy=(Py 左1 Ly 左1 -Py 右 1Ly 右1 ) / 2G, similarly Δx=(Px 左1 Lx 左1 -Px 右1 Lx 右1 ) / 2G;

[0090] When M Z <M G When the eccentricity Δy of the target bridge along the Y-axis of the rectangular coordinate system is given, by solving the simultaneous equilibrium equations, we obtain M. G = (Py1Ly1 + Py2Ly2) / 2, then according to M G =G×Δy, so Δy=(Py1Ly1+Py2Ly2) / 2G, and similarly Δx=(Px1Lx1+Px2Lx2) / 2G.

[0091] Step S300: Based on the eccentricities Δx and Δy, a new rectangular coordinate system X' and Y' is established with the center of the ball joint as the origin. A bridge structure weighing experiment is conducted to obtain the eccentricities Δx' and Δy' in the X' and Y' directions of the target bridge.

[0092] It should be noted that you should refer to [link / reference]. Figure 7 , Figure 7 The positions of the rectangular coordinate system X' and Y' are shown. The process of obtaining the eccentricities Δx' and Δy' of the X' axis and Y' axis based on the rectangular coordinate system X' and Y' of the target bridge is consistent with steps S100 to S200. The rectangular coordinate system is re-established based on the eccentricities Δx and Δy, and the eccentricities Δx' and Δy' are calculated again. By following the same steps as the previous calculation process, the reliability and accuracy of the data are ensured, laying a solid foundation for obtaining the center of gravity coordinates of the target bridge.

[0093] Step S400: Determine whether the deviations of the eccentricities Δx' and Δy' from Δx and Δy meet the accuracy requirements. If they do, the coordinates of the target bridge's center of gravity are obtained.

[0094] Specifically, according to the formula Δx' and Δy' are checked, where T1 is the eccentricity error value of the target bridge in the X-axis direction and T2 is the eccentricity error value of the target bridge in the Y-axis direction.

[0095] Determine whether T1 and T2 meet the accuracy requirements. If not, repeat step S300 until the accuracy requirements are met.

[0096] The Δx' and Δy' are checked, and the accuracy requirements are judged by the strict eccentricity error value. The target bridge's center of gravity coordinates are determined only when the error value is less than 5%. The strict accuracy requirements and repeated execution mechanism make the measurement results more reliable, providing accurate data support for the design, evaluation and maintenance of bridges, and greatly improving the accuracy of the center of gravity coordinates.

[0097] If satisfied, then the centroid coordinates of the target bridge are taken as follows:

[0098] Please see Figure 8 , Figure 8 The above steps are illustrated in the overall flowchart. By determining the center of gravity coordinates of the target bridge through these steps, the accuracy of the center of gravity coordinates and the reliability of the data are improved, thus providing a guarantee for the subsequent bridge rotation construction work.

[0099] Please see Figure 9 , Figure 9 This is a structural block diagram of a center-of-gravity positioning device for an ultra-wide asymmetric curved bridge constructed by rotation, according to an embodiment of the present invention. In this embodiment, the center-of-gravity positioning device for an ultra-wide asymmetric curved bridge constructed by rotation includes modules for performing... Figure 1 The steps in the corresponding embodiments. Please refer to the details. Figure 1 as well as Figure 1 The description in the corresponding embodiments is provided. For ease of explanation, only portions relevant to this embodiment are shown. See also... Figure 9 A center-of-gravity positioning device for an ultra-wide asymmetric curved bridge constructed by rotation includes: a weighing test module 10, a first acquisition module 11, a second acquisition module 12, and a center-of-gravity confirmation module 13, wherein:

[0100] Weighing Experiment Module 10: Used to establish a rectangular coordinate system X and Y with the center of the ball joint as the origin, and to conduct weighing experiments on bridge structures based on the ball joint rotation method;

[0101] First acquisition module 11: Used to acquire the frictional torque M of the ball joint of the target bridge. Z and the unbalanced moment M of the bridge structure G The eccentricities Δx and Δy of the target bridge in the X and Y directions are obtained based on the frictional torque of the ball joint and the unbalanced torque of the bridge structure.

[0102] The second acquisition module 12 is used to re-establish a rectangular coordinate system X' and Y' with the center of the ball joint as the origin based on the eccentricity Δx and Δy, and to conduct a bridge structure weighing experiment to obtain the eccentricity Δx' and Δy' of the target bridge in the X' and Y' directions.

[0103] Center of gravity confirmation module 13: used to determine the eccentricity Δx', Δy' andΔ x、 Δ If the deviation of y meets the accuracy requirements, then the coordinates of the target bridge's center of gravity are obtained.

[0104] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present invention is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0105] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0106] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A method for locating the center of gravity of an ultra-wide asymmetric curved bridge during rotation construction, characterized in that, The method includes: Step S100: Establish a rectangular coordinate system X and Y with the center of the ball joint as the origin, and conduct a bridge structure weighing experiment based on the ball joint rotation method; Step S200: Obtain the frictional torque of the ball joint of the target bridge. M Z Unbalanced moments in bridge structures M G ， The eccentricities Δx and Δy of the target bridge in the X and Y axes are obtained based on the frictional torque of the ball joint and the unbalanced torque of the bridge structure. Step S300: Based on the eccentricities Δx and Δy, a new rectangular coordinate system X' and Y' is established with the center of the ball joint as the origin. The rectangular coordinate system X' and Y' is re-established based on the eccentricities Δx and Δy. The rectangular coordinate system X' and Y' is not the same as the rectangular coordinate system X and Y. A bridge structure weighing experiment is conducted to obtain the eccentricities Δx' and Δy' in the X' and Y' directions of the target bridge. Step S400: Determine whether the deviations of the eccentricities Δx' and Δy' from Δx and Δy meet the accuracy requirements. If they do, obtain the coordinates of the target bridge's center of gravity. If they do not, repeat step S300 until the deviations meet the accuracy requirements. Step S200 includes: Step S201: Release the sandbox constraints and compare the frictional torque of the ball joint of the target bridge. M Z Unbalanced moments in bridge structures M G ; Step S202, if M Z >M G ， Then, jacks and displacement gauges are respectively placed on both sides of the X and Y axes of the rectangular coordinate system; if M Z <M G ， Determine the position of the target bridge's center of gravity in a rectangular coordinate system, and place jacks and displacement gauges on the side of the two coordinate axes adjacent to the target bridge in the same quadrant. Step S203: Apply a jacking force P to the jack and record the distance L from the jacking force to the origin of the rectangular coordinate system using a displacement dial indicator; Step S204: Adjust the jack from the preset pressing state to the critical pressing state to obtain the critical displacement value; Step S205: Based on the torque calculation formula, obtain the eccentricities Δx and Δy of the target bridge along the X and Y axes of the rectangular coordinate system.

2. The method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge during rotation construction according to claim 1, characterized in that, Step S202 includes: If the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, then jacks and displacement dial gauges are arranged on the left side of the X-axis and the right side of the Y-axis in the quadrant. If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, then jacks and displacement dial gauges shall be placed to the left of the X-axis and Y-axis in the quadrant in which the bridge is located. If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, then jacks and displacement dial gauges shall be arranged on the right side of the X-axis and the left side of the Y-axis in the quadrant in which it is located. If the center of gravity of the target bridge is located in the fourth quadrant of the rectangular coordinate system, then jacks and displacement dial gauges should be placed to the right of the X-axis and the right of the Y-axis in the quadrant in which it is located.

3. The method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge during rotation construction according to claim 2, characterized in that, Step S203 includes: when M Z >M G At that time, firstly, apply a jacking force Py to the left and right jacks in the Y direction respectively. 左 Py 右 The top force Py was recorded using a displacement percentage gauge. 左 Py 右 Distance Ly to the origin of the rectangular coordinate system 左 Ly 右 Secondly, a jacking force Px is applied to the jacks on the left and right sides in the X direction respectively. 左 Px 右 The top force Px was recorded using a displacement percentage gauge. 左 Px 右 Distance Lx to the origin of the rectangular coordinate system 左 Lx 右 ; when M Z <M G At that time, jacking forces Px and Py are applied sequentially to the jacks on the down-moving side of the support feet in the X-axis direction and the down-moving side of the support feet in the Y-axis direction of the rectangular coordinate system, and the distances Lx and Ly from the jacking forces Px and Py to the origin of the rectangular coordinate system are recorded by the displacement percentage gauge.

4. The method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge under rotation construction according to claim 3, characterized in that, Step S204 includes: Starting from the preset jacking state, the jacking force is gradually increased according to the preset jacking force increment. It is then determined whether the target bridge has reached the critical state. If so, the jacking force is stopped, and the critical jacking force and critical displacement value of the jack at this time are recorded.

5. The method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge under rotation construction according to claim 4, characterized in that, In step S205, the eccentricities Δx and Δy of the target bridge along the X and Y axes of the rectangular coordinate system are calculated based on the following equilibrium equations: in, M G For the unbalanced moment of the bridge structure, M Z Let G be the frictional torque of the ball joint, G be the weight of the target bridge, e be the eccentricity of the target bridge along the X and Y axes of the rectangular coordinate system, and Py be the frictional torque of the ball joint. 右1 The critical jacking force of the jack on the right side of the Y-axis, Ly 右1 The critical displacement value of the jack on the right side of the Y-axis, Py 左1 The critical jacking force of the jack on the left side of the Y-axis, Ly 左1 The critical displacement value of the jack on the left side of the Y-axis, Px 右1 The critical jacking force of the jack on the right side of the X-axis, Lx 右1 Px represents the critical displacement value of the jack on the right side of the X-axis. 左1 The critical jacking force of the jack on the left side of the X-axis, Lx 左1 Py1 is the critical displacement value of the left jack on the X-axis, Ly1 is the first critical jacking force of the jack on the Y-axis support foot moving side, Py2 is the second critical jacking force of the jack on the Y-axis support foot moving side, Ly2 is the second critical displacement value of the jack on the Y-axis support foot moving side, Px1 is the critical jacking force of the jack on the X-axis support foot moving side, Lx1 is the critical displacement value of the jack on the X-axis support foot moving side, Px2 is the second critical jacking force of the jack on the X-axis support foot moving side, Lx2 is the second critical displacement value of the jack on the X-axis support foot moving side.

6. The method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge during rotation construction according to claim 5, characterized in that, Step S400 includes: According to formula T1= T2= Δx' and Δy' are checked, where T1 is the eccentricity error value of the target bridge in the X-axis direction and T2 is the eccentricity error value of the target bridge in the Y-axis direction. Determine whether T1 and T2 meet the accuracy requirements. If not, repeat step S300 until the accuracy requirements are met. If satisfied, then the centroid coordinates of the target bridge are taken as ( , ).

7. The method for center-of-gravity positioning of an ultra-wide asymmetric curved bridge under rotation construction according to claim 6, characterized in that, The required accuracy is that both T1 and T2 are less than 5%.

8. A center-of-gravity positioning device for an ultra-wide asymmetric curved bridge constructed by rotation, used to implement the method described in any one of claims 1 to 7, characterized in that, The device includes: Weighing Experiment Module: Used to establish a rectangular coordinate system X and Y with the center of the ball joint as the origin, and to conduct weighing experiments on bridge structures based on the ball joint rotation method; First acquisition module: used to acquire the frictional torque of the ball joint of the target bridge. M Z Unbalanced moments in bridge structures M G The first module obtains the eccentricities Δx and Δy of the target bridge in the X and Y directions based on the frictional torque of the ball joint and the unbalanced torque of the bridge structure. The second module is used to re-establish a rectangular coordinate system X' and Y' with the center of the ball joint as the origin based on the eccentricities Δx and Δy. The rectangular coordinate system X' and Y' is not the same as the original rectangular coordinate system X and Y. A bridge structure weighing experiment is conducted to obtain the eccentricities Δx' and Δy' of the target bridge in the X and Y directions. Center of gravity confirmation module: used to determine whether the deviations of the eccentricities Δx' and Δy' from Δx and Δy meet the accuracy requirements. If they do, the center of gravity coordinates of the target bridge are obtained; if they do not, step S300 is repeated until the deviations meet the accuracy requirements.

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