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

Abstract

The invention discloses a gravity center positioning method and device for an ultra-wide asymmetric curve bridge in swivel construction, and belongs to the field of bridge swivel construction, and the method specifically comprises the following steps: taking a spherical hinge center as an original point to establish rectangular coordinate systems X and Y, and carrying out a bridge structure weighing experiment based on a spherical hinge rotation method; the friction torque MZ of a spherical hinge of a target bridge and the unbalanced torque MG of a bridge structure are obtained, and the eccentric distances delta x and delta y of the target bridge in the X-axis direction and the Y-axis direction are obtained according to the friction torque MZ of the spherical hinge and the unbalanced torque MG of the bridge structure; based on the eccentric distances deltax and deltay, establishing rectangular coordinate systems X 'and Y' by taking the spherical hinge center as the original point again, and carrying out a bridge structure weighing experiment to obtain the eccentric distances deltax 'and deltay' of the target bridge in the X 'and Y' directions; whether the deviation between the eccentric distances delta x'and delta y 'and the deviation between delta x and delta y meet the precision requirement or not is judged, if yes, the barycentric coordinates of the target bridge are obtained, the barycentric position of the ultra-wide asymmetric curve bridge can be rapidly positioned, and convenience is provided for bridge swivel construction.

Description

Technical Field

[0001] The invention belongs to the field of bridge rotation construction, and in particular relates to a method and a device for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotation construction. Background Art

[0002] The accelerated urbanization process and rapid development of transportation have resulted in crisscrossing traffic routes. In order to minimize the impact on the operation of existing traffic routes, rotation construction is one of the best construction solutions for bridges across existing traffic lines. However, as the span and tonnage of bridges increase, the difficulty of bridge rotation construction also increases significantly, and the center of gravity of the bridge structure is difficult to determine.

[0003] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: At present, the center of gravity of the bridge structure is mainly determined by carrying out a weighing test on the bridge structure. However, when encountering the rotation construction of an ultra-wide asymmetric curved bridge, the traditional weighing test method is no longer applicable, which is bound to affect the smooth progress of the 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 the subsequent rotation construction of such bridges. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a method and device for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotation construction, which can solve the problem that the traditional weighing test method in the prior art is not convenient for locating the center of gravity of an ultra-wide asymmetric curved bridge.

[0006] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0007] In a first aspect, an embodiment of the present invention provides a method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotational construction, the method comprising:

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

[0009] Step S200, obtaining the friction torque M of the ball joint of the target bridge Z and the unbalanced moment M of the bridge structure G , according to the friction torque of the ball joint and the unbalanced torque of the bridge structure, the eccentricities Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained;

[0010] Step S300, based on the eccentricities Δx and Δy, a rectangular coordinate system X' and Y' is re-established with the center of the spherical joint as the origin, and a bridge structure weighing experiment is performed to obtain the eccentricities Δx' and Δy' of the target bridge in the X' and Y' directions;

[0011] Step S400, determining whether the deviations between the eccentricities Δx', Δy' and Δx, Δy meet the accuracy requirements, and if so, obtaining the target bridge center of gravity coordinates.

[0012] Preferably, the step S200 includes:

[0013] Step S201, releasing the sandbox constraint and comparing the friction torque M of the spherical 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 place jacks and displacement dial indicators on both sides of the X-axis and Y-axis of the rectangular coordinate system; if M Z <M G , determine the quadrant position of the target bridge's center of gravity in the rectangular coordinate system, and arrange jacks and displacement dial indicators in the semi-axis directions of the two adjacent coordinate axes in the quadrant;

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

[0016] Step S204, adjusting the jack from a preset top pressure state to a critical top pressure state to obtain a critical displacement value;

[0017] Step S205, according to the moment calculation formula, the eccentricities Δx and Δy of the target bridge along the X-axis and Y-axis directions of the rectangular coordinate system are obtained.

[0018] Preferably, the step S202 includes:

[0019] If the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the left side of the X-axis direction and the right side of the Y-axis direction of the quadrant;

[0020] If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the left side of the X-axis direction and the left side of the Y-axis direction of the quadrant;

[0021] If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the right side of the X-axis direction and the left side of the Y-axis direction of the quadrant;

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

[0023] Preferably, the step S203 includes:

[0024] When M Z >M G When the Y direction is set, the jacks on the left and right sides first provide a top force Py 左 , Py 右 And record the top force Py through the displacement percentage gauge 左 , Py 右 The distance to the origin of the rectangular coordinate system Ly 左 ,Ly 右 , then provide the jacking force Px to the left and right jacks in the X direction respectively 左 , Px 右 And record the top force Px through the displacement dial 左 , Px 右 The distance to the origin of the rectangular coordinate system Lx 左 ,Lx 右 ;

[0025] When M Z <M G When the jacks are moved downwards by the support foot in the X-axis direction and the Y-axis direction respectively, the jacking forces Px and Py are applied to the jacks, 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 dial gauge;

[0026] Preferably, the step S204 includes:

[0027] The jack is started from a preset jacking pressure state and the jacking force is gradually increased according to the preset jacking force increment, and it is determined whether the target bridge reaches a critical state. If so, the jacking force is stopped from being increased, 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 is the unbalanced moment of the bridge structure, M Z is the friction torque of the spherical joint, G is the weight of the target bridge, e is the eccentricity of the target bridge along the X-axis and Y-axis of the rectangular coordinate system, Py 右1 is the critical jacking force of the right side jack of the Y axis, Ly 右1 is the critical displacement value of the jack on the right side of the Y axis, Py 左1 is the critical jacking force of the jack on the left side of the Y axis, Ly 左1 is the critical displacement value of the jack on the left side of the Y axis, Px 右1 is the critical jacking force of the right side jack of the X-axis, Lx 右1is the critical displacement value of the jack on the right side of the X-axis, Px 左1 is the critical jacking force of the jack on the left side of the X-axis, Lx 左1 is the critical displacement value of the jack on the left side of the X-axis, Py1 is the first critical jacking force of the jack on the downward side of the Y-axis support foot, Ly1 is the first critical displacement value of the jack on the downward side of the Y-axis support foot, Py2 is the second critical jacking force of the jack on the downward side of the Y-axis support foot, Ly2 is the second critical displacement value of the jack on the downward side of the Y-axis support foot, Px1 is the critical jacking force of the jack on the downward side of the X-axis support foot, Lx1 is the critical displacement value of the jack on the downward side of the X-axis support foot, Px2 is the second critical jacking force of the jack on the downward side of the X-axis support foot, and Lx2 is the second critical displacement value of the jack on the downward side of the X-axis support foot.

[0032] Preferably, the step S400 includes:

[0033] According to the formula Check Δx' and Δy', 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 target bridge center of gravity coordinates as

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

[0036] In a second aspect, an embodiment of the present invention provides a center of gravity positioning device for an ultra-wide asymmetric curved bridge in rotational construction, the device comprising:

[0037] Weighing experiment module: used to establish rectangular coordinate systems X and Y with the center of the spherical joint as the origin, and to conduct bridge structure weighing experiments based on the spherical joint rotation method;

[0038] The first acquisition module is used to acquire the friction torque of the ball joint of the target bridge and the unbalanced torque of the bridge structure, and obtain the eccentricities Δx and Δy in the X-axis and Y-axis directions of the target bridge according to the friction torque of the ball joint and the unbalanced torque of the bridge structure;

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

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

[0041] In an embodiment of the present invention, a method for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotational construction provided by the present invention has the following beneficial effects: firstly, a rectangular coordinate system X, Y is established with the center of the spherical joint as the origin, and a bridge structure weighing experiment is performed based on the spherical joint rotation method, and the friction torque M of the spherical joint of the target bridge is obtained. Z and the unbalanced moment M of the bridge structure G , combined with the equilibrium equation, the eccentricities Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained, based on the eccentricities Δx and Δy, the rectangular coordinate systems X' and Y' are re-established with the center of the spherical joint as the origin, and the bridge structure weighing experiment is re-performed to obtain the eccentricities Δx' and Δy' of the target bridge in the X' and Y' directions, and the error judgment of the eccentricities Δx' and Δy' is performed. If the error is within the accuracy requirement, the center of gravity coordinates of the target bridge are obtained, thereby ensuring the reliability and accuracy of the determination of the center of gravity position, solving the problem that the traditional weighing test method cannot quickly and accurately determine the center of gravity position of the ultra-wide asymmetric curved bridge, and providing accurate center of gravity data for the rotation construction of the ultra-wide asymmetric curved bridge, which greatly improves the safety and stability of the construction, reduces the construction risk, and ensures the high quality and efficiency of the bridge rotation construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a method flow chart of a method for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotational construction according to an embodiment of the present invention;

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

[0044] Figure 3 M Z >M G Schematic diagram of the left side lifting in the Y-axis direction;

[0045] Figure 4 M Z >M G Schematic diagram of the right side lifting in the Y-axis direction;

[0046] Figure 5 M Z <M G Schematic diagram of the right side lifting in the Y-axis direction;

[0047] Figure 6 M Z <M G Schematic diagram of unloading and lifting on the right side of the Y-axis direction;

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

[0049] Figure 8 It is an overall operation flow chart of a method for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotation construction according to an embodiment of the present invention;

[0050] Fig. 9 It is a structural block diagram of a center of gravity positioning device for an ultra-wide asymmetric curved bridge with rotation construction according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] 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 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.

[0052] The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein. In addition, the term "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0053] In conjunction with the accompanying drawings, a method and device for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotation construction provided by an embodiment of the present invention will be described in detail through specific embodiments and application scenarios.

[0054] See also Figure 1 , Figure 1 The present invention shows a flowchart of a method for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotational construction provided by an embodiment of the present invention.

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

[0056] See also Figure 2 By establishing a rectangular coordinate system with the center of the spherical joint as the origin, a bridge structure weighing experiment is carried out, which provides a clear reference system for subsequent measurements and calculations, making the measurement and calculation of various parameters more accurate.

[0057] Step S200, obtaining the friction torque M of the ball joint of the target bridge Zand the unbalanced moment M of the bridge structure G , according to the friction torque of the ball joint and the unbalanced torque of the bridge structure, the eccentricities Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained;

[0058] Specifically, in step S201, the sandbox constraint is released, and the friction torque M of the spherical 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 place jacks and displacement dial indicators on both sides of the X-axis and Y-axis of the rectangular coordinate system; if M Z <M G , determine the quadrant position of the target bridge's center of gravity in the rectangular coordinate system, and arrange jacks and displacement dial indicators in the semi-axis directions of the two adjacent coordinate axes in the quadrant;

[0060] Specifically, if the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the left side of the X-axis direction and the right side of the Y-axis direction of the quadrant;

[0061] If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the left side of the X-axis direction and the left side of the Y-axis direction of the quadrant;

[0062] If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the right side of the X-axis direction and the left side of the Y-axis direction of the quadrant;

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

[0064] By comparing the friction torque of the ball joint and the unbalanced torque of the bridge structure, the state of the bridge can be accurately judged, providing an accurate basis for the layout of the jacks, thereby improving the accuracy of the eccentricity calculation and determining the offset of the center of gravity of the bridge structure. The center of gravity of the bridge structure can then be translated to the center of the ball joint through counterweights, providing protection for subsequent rotation construction work.

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

[0066] Specifically, when M Z >M G When the Y direction is set, the jacks on the left and right sides first provide a top force Py 左 , Py 右And record the top force Py through the displacement percentage gauge 左 , Py 右 The distance to the origin of the rectangular coordinate system Ly 左 ,Ly 右 , then provide the jacking force Px to the left and right jacks in the X direction respectively 左 , Px 右 And record the top force Px through the displacement dial 左 , Px 右 The distance to the origin of the rectangular coordinate system Lx 左 ,Lx 右 ;

[0067] When M Z <M G When the jacks are moved downwards by the support foot in the X-axis direction and the Y-axis direction respectively, the jacking forces Px and Py are applied to the jacks, 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 dial gauge;

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

[0069] Step S204, adjusting the jack from a preset top pressure state to a critical top pressure state to obtain a critical displacement value;

[0070] Specifically, the jack is increased step by step from a preset jacking pressure state according to a preset jacking force increment, wherein the preset jacking force increment is 1 MPa / step, and it is determined whether the target bridge has reached a critical state. If so, the jacking force is stopped from being increased, 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, increasing the jacking force step by step and judging the critical state can effectively avoid damage to the bridge structure caused by excessive jacking force and ensure the safety of the bridge during the measurement process.

[0072] Please note that Figure 3 to Figure 4 , Figure 3 to Figure 4 For M Z >M G Schematic diagram of lifting on the left and right sides of the Y axis. Z >M G When the displacement meter records Ly 左After that, the jack on the left side of the Y direction is gradually increased from the initial top pressure state according to the preset top force increment; it is determined whether the jack on the left side of the Y direction has reached a critical state. If so, the top force is stopped from being increased, and the top force Py of the jack at this time is recorded. 左1 And the corresponding critical displacement value Ly 左1 ; Unload the left jack in the Y direction and provide a top force Py to the right jack in the Y direction 右 , record Py at this time 右 The distance to the origin of the rectangular coordinate system Ly 右 , the jack on the right side of the Y direction is gradually increased from the initial top pressure state according to the preset top force increment; it is determined whether the jack on the right side of the Y direction has reached a critical state, if so, the top force is stopped, and the top force Py of the jack at this time is recorded 右1 And the corresponding critical displacement value Ly 右1 ;

[0073] The displacement dial gauge records Lx 左 After that, the jack on the left side of the X direction is gradually increased from the initial top pressure state according to the preset top force increment; it is determined whether the jack on the left side of the X direction reaches a critical state. If so, the top force is stopped from being increased, and the top force Px of the jack at this time is recorded. 左1 And the corresponding critical displacement value Lx 左1 ; Unload the jack on the left side of the X direction and provide a top force Px to the jack on the right side of the X direction 右 , record Px at this time 右 The distance to the origin of the rectangular coordinate system Lx 右 , the jack on the right side of the X direction is gradually increased from the initial top pressure state according to the preset top force increment; it is determined whether the jack on the right side of the X direction has reached a critical state, if so, the top force is stopped, and the top force Px of the jack at this time is recorded 右1 And the corresponding critical displacement value Lx 右1 ;

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

[0075] Case 1: If the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, the jack and displacement dial indicator are arranged on the left side of the X-axis direction and the right side of the Y-axis direction of the quadrant. Figures 5 and 6 , Figures 5 and 6 For M Z <M GA schematic diagram of lifting and unloading and falling back on the right side of the Y-axis direction is shown. After the displacement percentage meter records Ly, the jack on the right side of the Y-axis 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, the first critical state is that the bridge structure has slipped, if so, the jacking force is stopped from being increased, and the first critical jacking force Py1 and the corresponding first critical displacement value Ly1 of the jack at this time are recorded; the jack on the right side of the Y-axis is unloaded, and it is determined whether the target bridge has reached the second critical state, the second critical state is that the bridge structure has reversely slipped, if so, the second critical jacking force Py2 and the corresponding second critical displacement value Ly2 of the jack at this time are recorded;

[0076] After the displacement percentage meter records Lx, the jack on the left side of 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 from being increased, and the jacking force Px1 of the jack at this time and the corresponding first critical displacement value Lx1 are recorded; the jack on the left side of 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 of the jack at this time and the corresponding second critical displacement value Lx2 are recorded;

[0077] Case 2: If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, jacks and displacement percentage indicators are arranged on the left side of the X-axis direction and the left side of the Y-axis direction of the quadrant. After the displacement percentage indicator records Ly, the jack on the left side of the Y direction is gradually increased from the initial top pressure state according to the preset top force increment; it is judged whether the target bridge has reached the first critical state, the first critical state is that the bridge structure slides, if so, the top force is stopped from being increased, and the first critical top force Py1 of the jack at this time and the corresponding first critical displacement value Ly1 are recorded; the jack on the left side of the Y direction is unloaded to judge whether the target bridge has reached the second critical state, the second critical state is that the bridge structure slides in the opposite direction, if so, the second critical top force Py2 of the jack at this time and the corresponding second critical displacement value Ly2 are recorded;

[0078] After the displacement percentage meter records Lx, the jack on the left side of 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 from being increased, and the jacking force Px1 of the jack at this time and the corresponding first critical displacement value Lx1 are recorded; the jack on the left side of 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 of the jack at this time and the corresponding second critical displacement value Lx2 are recorded;

[0079] Case three: If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, jacks and displacement percentage gauges are arranged on the right side of the X-axis direction and the left side of the Y-axis direction of the quadrant. After the displacement percentage gauge records Ly, the jack on the left side of the Y direction is gradually increased from the initial top pressure state according to the preset top force increment; it is judged whether the target bridge has reached the first critical state, the first critical state is that the bridge structure has slipped, if so, the top force is stopped from being increased, and the first critical top force Py1 of the jack at this time and the corresponding first critical displacement value Ly1 are recorded; the jack on the left side of the Y direction is unloaded to judge whether the target bridge has reached the second critical state, the second critical state is that the bridge structure has reversed sliding, if so, the second critical top force Py2 of the jack at this time and the corresponding second critical displacement value Ly2 are recorded;

[0080] After the displacement percentage meter records Lx, the jack on the right side of 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 from being increased, and the jacking force Px1 of the jack at this time and the corresponding first critical displacement value Lx1 are recorded; the jack on the right side of 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 of the jack at this time and the corresponding second critical displacement value Lx2 are recorded;

[0081] Case 4: If the center of gravity of the target bridge is located in the fourth quadrant of the rectangular coordinate system, jacks and displacement percentage indicators are arranged on the right side of the X-axis direction and the right side of the Y-axis direction of the quadrant. After the displacement percentage indicator records Ly, the jack on the right side of the Y direction is gradually increased from the initial top pressure state according to the preset top force increment; it is judged whether the target bridge has reached the first critical state, the first critical state is that the bridge structure has slipped, if so, the top force is stopped from being increased, and the first critical top force Py1 of the jack at this time and the corresponding first critical displacement value Ly1 are recorded; the jack on the right side of the Y direction is unloaded to judge whether the target bridge has reached the second critical state, the second critical state is that the bridge structure has reversed sliding, if so, the second critical top force Py2 of the jack at this time and the corresponding second critical displacement value Ly2 are recorded;

[0082] After the displacement percentage meter records Lx, the jack on the right side of 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 from being increased, and the jacking force Px1 of the jack at this time and the corresponding first critical displacement value Lx1 are recorded; the jack on the right side of 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 of the jack at this time and the corresponding second critical displacement value Lx2 are recorded;

[0083] Providing jacking force to the jack and recording the distance to the origin of the rectangular coordinate system, as well as increasing the jacking force step by step according to the preset jacking force increment and judging the critical state, can accurately obtain the critical jacking force and critical displacement values. These data provide a more accurate basis for the subsequent eccentricity calculation, and ultimately improve the measurement accuracy of the eccentricities Δx and Δy in the X-axis and Y-axis directions of the target bridge. In addition, different jack layout schemes and operating procedures can adapt to various bridge conditions and ensure the smooth progress of the measurement process.

[0084] Step S205, according to the moment calculation formula, the eccentricities Δx and Δy of the target bridge along the X-axis and Y-axis directions of the rectangular coordinate system are obtained.

[0085] Specifically, the equilibrium equation is:

[0086]

[0087] M G =G×e

[0088] Among them, M G is the unbalanced moment of the bridge structure, M Z is the friction torque of the spherical joint, G is the weight of the target bridge, e is the eccentricity of the target bridge along the X-axis and Y-axis of the rectangular coordinate system, Py 右1 is the critical jacking force of the right side jack of the Y axis, Ly 右1 is the critical displacement value of the jack on the right side of the Y axis, Py 左1 is the critical jacking force of the jack on the left side of the Y axis, Ly 左1 is the critical displacement value of the jack on the left side of the Y axis, Px 右1 is the critical jacking force of the right side jack of the X-axis, Lx 右1 is the critical displacement value of the jack on the right side of the X-axis, Px 左1 is the critical jacking force of the jack on the left side of the X-axis, Lx 左1 is the critical displacement value of the jack on the left side of the X-axis, Py1 is the first critical jacking force of the jack on the downward side of the Y-axis support foot, Ly1 is the first critical displacement value of the jack on the downward side of the Y-axis support foot, Py2 is the second critical jacking force of the jack on the downward side of the Y-axis support foot, Ly2 is the second critical displacement value of the jack on the downward side of the Y-axis support foot, Px1 is the critical jacking force of the jack on the downward side of the X-axis support foot, Lx1 is the critical displacement value of the jack on the downward side of the X-axis support foot, Px2 is the second critical jacking force of the jack on the downward side of the X-axis support foot, and Lx2 is the second critical displacement value of the jack on the downward 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 Δy, by solving the equilibrium equations, we can get M G =(Py左1 Ly 左1 -Py 右1 Ly 右1 ) / 2, and then according to M G =G×Δy, we get 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 Δy, by solving the equilibrium equations, we can get M G =(Py1Ly1+Py2Ly2) / 2, then according to M G =G×Δy, and we get Δy=(Py1Ly1+Py2Ly2) / 2G. Similarly, Δx=(Px1Lx1+Px2Lx2) / 2G.

[0091] Step S300, based on the eccentricities Δx and Δy, a rectangular coordinate system X' and Y' is re-established with the center of the spherical joint as the origin, and a bridge structure weighing experiment is performed to obtain the eccentricities Δx' and Δy' of the target bridge in the X' and Y' directions;

[0092] Please note that 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' in the directions of the X' and Y' axes 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. The reliability and accuracy of the data are ensured through steps consistent with the previous calculation process, laying a solid foundation for obtaining the center of gravity coordinates of the target bridge.

[0093] Step S400, determining whether the deviations between the eccentricities Δx', Δy' and Δx, Δy meet the accuracy requirements, and if so, obtaining the target bridge center of gravity coordinates.

[0094] Specifically, according to the formula Check Δx' and Δy', 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 requirement. If not, repeat step S300 until the accuracy requirement is met.

[0096] Δx' and Δy' are calibrated, and the accuracy requirements are judged by strict eccentricity error values. The center of gravity coordinates of the target bridge 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 it satisfies, the coordinates of the target bridge center of gravity are taken as

[0098] See also Figure 8 , Figure 8 The overall operation flow chart of the above steps is shown. The center of gravity coordinates of the target bridge are determined through the above steps, which improves the accuracy of the center of gravity coordinates and the reliability of the data, and provides a guarantee for the subsequent bridge rotation construction work.

[0099] See also Fig. 9 , Fig. 9 1 is a structural block diagram of a gravity center positioning device for an ultra-wide asymmetric curved bridge with rotational construction provided by an embodiment of the present invention. In this embodiment, the gravity center positioning device for an ultra-wide asymmetric curved bridge with rotational construction includes modules for executing Figure 1 For details, please refer to the steps in the corresponding embodiment. Figure 1 as well as Figure 1 For the convenience of explanation, only the part related to this embodiment is shown. Fig. 9 A gravity center positioning device for an ultra-wide asymmetric curved bridge of a rotating construction includes: a weighing experiment module 10, a first acquisition module 11, a second acquisition module 12, and a gravity center confirmation module 13, wherein:

[0100] Weighing experiment module 10: used to establish rectangular coordinate systems X and Y with the center of the spherical joint as the origin, and to perform bridge structure weighing experiments based on the spherical joint rotation method;

[0101] The first acquisition module 11 is used to obtain the friction torque M of the ball joint of the target bridge Z and the unbalanced moment M of the bridge structure G , according to the friction torque of the ball joint and the unbalanced torque of the bridge structure, the eccentricities Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained;

[0102] The second acquisition module 12 is used to re-establish the rectangular coordinate system X' and Y' with the center of the spherical joint as the origin based on the eccentricities Δx and Δy, and perform a bridge structure weighing experiment to obtain the eccentricities 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 Whether the deviation of y meets the accuracy requirement, if so, the center of gravity coordinates of the target bridge are obtained.

[0104] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present invention is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0105] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0106] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotational construction, characterized in that: The method comprises: Step S100, establishing a rectangular coordinate system X, Y with the center of the spherical joint as the origin, and performing a bridge structure weighing experiment based on the spherical joint rotation method; Step S200, obtaining the friction torque M of the ball joint of the target bridge Z and the unbalanced moment M of the bridge structure G , according to the friction torque of the ball joint and the unbalanced torque of the bridge structure, the eccentricities Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained; Step S300, based on the eccentricities Δx and Δy, a rectangular coordinate system X' and Y' is re-established with the center of the spherical joint as the origin, and a bridge structure weighing experiment is performed to obtain the eccentricities Δx' and Δy' of the target bridge in the X' and Y' directions; Step S400, determining the eccentricity Δx', Δy' and Δ x、 Δ Whether the deviation of y meets the accuracy requirement, if so, the center of gravity coordinates of the target bridge are obtained.

2. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge with rotation construction according to claim 1 is characterized in that: The step S200 includes: Step S201, releasing the sandbox constraint and comparing the friction torque M of the spherical joint of the target bridge Z and the unbalanced moment M of the bridge structure G ; Step S202: If M Z >M G , then place jacks and displacement dial indicators on both sides of the X-axis and Y-axis of the rectangular coordinate system; if M Z <M G , determine the quadrant position of the target bridge's center of gravity in the rectangular coordinate system, and arrange jacks and displacement dial indicators on the downstroke side of the two adjacent coordinate axis support feet in the quadrant; Step S203, providing a jacking force P to the jack, and using a displacement dial gauge to record a distance L from the jacking force to the origin of the rectangular coordinate system; Step S204, adjusting the jack from a preset top pressure state to a critical top pressure state to obtain a critical displacement value; Step S205, according to the moment calculation formula, the eccentricities Δx and Δy of the target bridge along the X-axis and Y-axis directions of the rectangular coordinate system are obtained.

3. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotation construction according to claim 2 is characterized in that: The step S202 includes: If the center of gravity of the target bridge is located in the first quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the left side of the X-axis direction and the right side of the Y-axis direction of the quadrant; If the center of gravity of the target bridge is located in the second quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the left side of the X-axis direction and the left side of the Y-axis direction of the quadrant; If the center of gravity of the target bridge is located in the third quadrant of the rectangular coordinate system, a jack and a displacement dial indicator are arranged on the right side of the X-axis direction and the left side of the Y-axis direction of the quadrant; If the center of gravity of the target bridge is located in the fourth quadrant of the rectangular coordinate system, jacks and displacement dial indicators are arranged on the right side of the X-axis direction and the right side of the Y-axis direction of the quadrant.

4. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotation construction according to claim 3 is characterized in that: The step S203 includes: When M Z >M G When the Y direction is set, the jacks on the left and right sides first provide a top force Py 左 , Py 右 And record the top force Py through the displacement percentage gauge 左 , Py 右 The distance to the origin of the rectangular coordinate system Ly 左 ,Ly 右 , then provide the jacking force Px to the left and right jacks in the X direction respectively 左 , Px 右 And record the top force Px through the displacement dial 左 , Px 右 The distance to the origin of the rectangular coordinate system Lx 左 ,Lx 右 ; When M Z <M G When the jacks are moved downwards in the X-axis direction and the Y-axis direction of the rectangular coordinate system, the jacking forces Px and Py are provided in turn, 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 dial gauge.

5. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotation construction according to claim 4 is characterized in that: The step S204 includes: The jack is started from a preset jacking pressure state and the jacking force is gradually increased according to the preset jacking force increment, and it is determined whether the target bridge reaches a critical state. If so, the jacking force is stopped from being increased, and the critical jacking force and critical displacement value of the jack at this time are recorded.

6. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotation construction according to claim 5 is characterized in that: The equilibrium equation is: M G =G×e Among them, M G is the unbalanced moment of the bridge structure, M Z is the friction torque of the spherical joint, G is the weight of the target bridge, e is the eccentricity of the target bridge along the X-axis and Y-axis of the rectangular coordinate system, Py 右1 is the critical jacking force of the right side jack of the Y axis, Ly 右1 is the critical displacement value of the jack on the right side of the Y axis, Py 左1 is the critical jacking force of the jack on the left side of the Y axis, Ly 左1 is the critical displacement value of the jack on the left side of the Y axis, Px 右1 is the critical jacking force of the right side jack of the X-axis, Lx 右1 is the critical displacement value of the jack on the right side of the X-axis, Px 左1 is the critical jacking force of the jack on the left side of the X-axis, Lx 左1 is the critical displacement value of the jack on the left side of the X-axis, Py1 is the first critical jacking force of the jack on the downward side of the Y-axis support foot, Ly1 is the first critical displacement value of the jack on the downward side of the Y-axis support foot, Py2 is the second critical jacking force of the jack on the downward side of the Y-axis support foot, Ly2 is the second critical displacement value of the jack on the downward side of the Y-axis support foot, Px1 is the critical jacking force of the jack on the downward side of the X-axis support foot, Lx1 is the critical displacement value of the jack on the downward side of the X-axis support foot, Px2 is the second critical jacking force of the jack on the downward side of the X-axis support foot, and Lx2 is the second critical displacement value of the jack on the downward side of the X-axis support foot.

7. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotational construction according to claim 6 is characterized in that: The step S400 includes: According to the formula Check Δx' and Δy', 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 requirement. If not, repeat step S300 until the accuracy requirement is met. If it satisfies, the coordinates of the target bridge center of gravity are taken as 8. The method for locating the center of gravity of an ultra-wide asymmetric curved bridge in rotational construction according to claim 7, characterized in that: The accuracy requirement is that both T1 and T2 are less than 5%.

9. A gravity center positioning device for an ultra-wide asymmetric curved bridge in rotation construction, characterized in that: The device comprises: Weighing experiment module: used to establish rectangular coordinate systems X and Y with the center of the spherical joint as the origin, and to conduct bridge structure weighing experiments based on the spherical joint rotation method; The first acquisition module: used to obtain the friction torque M of the ball joint of the target bridge Z and the unbalanced moment M of the bridge structure G , according to the friction torque of the ball joint and the unbalanced torque of the bridge structure, the eccentricities Δx and Δy of the target bridge in the X-axis and Y-axis directions are obtained; The second acquisition module is used to re-establish the rectangular coordinate system X' and Y' with the center of the spherical joint as the origin based on the eccentricities Δx and Δy, and perform a bridge structure weighing experiment 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', Δy' and Δx, Δy meet the accuracy requirements. If so, the center of gravity coordinates of the target bridge are obtained.

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