Cantilever pouring bridge formwork adjusting method based on space transformation

Abstract

The present application relates to bridge construction monitoring positioning technical field, especially in a kind of based on spatial transformation's cantilever pouring bridge formwork adjusting method.It includes the following steps: measuring the actual space state of bridge formwork;According to the design parameters of bridge, the target space state of bridge formwork is calculated;The transformation matrix of bridge formwork is calculated using the actual space state and target space state of bridge formwork;The actual position information of bridge formwork driving assembly is measured, and the target position information of driving assembly is calculated according to the transformation matrix of bridge formwork;According to the actual position information and target position information of driving assembly, the adjustment amount is calculated, and the driving assembly is controlled and adjusted using the adjustment amount calculated.Have beneficial effect: by measuring and collecting the various data of side formwork, bottom formwork and bridge segment, the target space state of formwork is calculated, and the stroke adjustment amount of driving assembly is calculated according to the current space state and target space state of formwork, so that driving assembly pushes formwork to reach target space state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction monitoring and positioning, in particular to a cantilever pouring bridge formwork adjustment method based on space transformation. BACKGROUND

[0002] In the process of cantilever pouring bridge construction, the line shape control of the beam body is an important content of construction control. Before each hanging basket moves forward in the process of cantilever pouring bridge construction, the position state of the formwork needs to be adjusted once. At present, the main adjustment method is to measure the elevation of the formwork control point, and to repeatedly measure the extension of each formwork control driving component to make the elevation of the control point reach the target elevation of the formwork control point required by the supervision or the three-party unit. The adjustment efficiency is low, and the repeated adjustment of the driving component increases the additional safety risk and mechanical loss. Therefore, the present application provides a cantilever pouring bridge formwork adjustment method based on space transformation. SUMMARY

[0003] The present application aims to overcome the defects of the prior art, and provides a cantilever pouring bridge formwork adjustment method based on space transformation, which solves the problems of low efficiency, safety risk and mechanical loss in adjusting the position of the formwork.

[0004] The present application provides a cantilever pouring bridge formwork adjustment method based on space transformation, and the technical scheme is as follows: including the following steps: measuring the actual space state of the bridge formwork; calculating the target space state of the bridge formwork according to the design parameters of the bridge; calculating the transformation matrix of the bridge formwork by using the actual space state and the target space state of the bridge formwork; measuring the actual position information of the driving component of the bridge formwork, and calculating the target position information of the driving component according to the transformation matrix of the bridge formwork; calculating the adjustment amount according to the actual position information and the target position information of the driving component, and controlling and adjusting the driving component by using the calculated adjustment amount.

[0005] Further, the actual space state of the bridge formwork is measured, including the following steps: arranging measuring points at corresponding positions of the bridge formwork, and arranging at least three measuring points on each formwork; measuring the coordinates of the arranged measuring points to obtain the actual coordinate information.

[0006] Further, the target space state of the bridge formwork is calculated according to the design parameters of the bridge, including the following steps: selecting a measuring point arranged on the corresponding formwork, calculating the target coordinate information of the selected measuring point, and the calculation formula and parameters are as follows:

[0007] M0=M1+f1+f2+f3

[0008] Wherein:

[0009] M0: target coordinate information of the measuring point;

[0010] M1: actual coordinate information of the measuring point;

[0011] f1: pre-camber of the bridge at the current measuring point;

[0012] f2: elastic deformation of the hanging basket of the bridge at the current measuring point;

[0013] f3: pouring error value of the bridge at the current measuring point;

[0014] According to the distance between the measuring points, the target coordinate information of each measuring point is converted.

[0015] Further, after the driving assembly adjusts the formwork, the spatial coordinates of the formwork are measured and reviewed, and when the target position is not reached, the current spatial state of the formwork is calculated, the stroke adjustment amount of the driving assembly is recalculated, and the formwork is further adjusted.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] By measuring and collecting various data of the side formwork, the bottom formwork and the bridge segment, the target spatial state of the formwork is calculated, and the stroke adjustment amount of the driving assembly is calculated according to the current spatial state and the target spatial state of the formwork, so that the driving assembly pushes the formwork to the target spatial state.

[0018] Through accurate calculation of the adjustment amount of the driving assembly, the driving assembly adjusts the formwork at one time, improves the work efficiency, and also avoids the safety hazards existing in repeated adjustment of the driving assembly.

[0019] The measurement of the formwork, the calculation of the spatial coordinate state and the movement adjustment are all realized automatically, which reduces the errors that may be caused by personnel operation, improves the work efficiency, and saves time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the formwork control measuring point scheme of the space transformation cantilever pouring bridge formwork adjustment method of the present application.

[0021] Figure 2 It is a side view of the formwork control measuring point scheme of the space transformation cantilever pouring bridge formwork adjustment method of the present application.

[0022] Figure 3 It is a bottom view of the formwork control measuring point scheme of the space transformation cantilever pouring bridge formwork adjustment method of the present application.

[0023] Figure 4 It is a driving assembly stroke adjustment amount calculation schematic diagram of the space transformation cantilever pouring bridge formwork adjustment method of the present application. DETAILED DESCRIPTION

[0024] The application will be further described below in connection with the drawings and specific embodiments.

[0025] Referring to Figure 1 , the application provides a cantilever pouring bridge formwork adjustment method based on spatial transformation, which solves the problems of low efficiency, safety risks and mechanical loss in adjusting the position of the formwork. By measuring and collecting various data of the side formwork, the bottom formwork and the bridge segment, the target spatial state of the formwork is calculated, and the stroke adjustment amount of the driving assembly is calculated according to the current spatial state and the target spatial state of the formwork, so that the driving assembly pushes the formwork to the target spatial state. Through accurate calculation of the adjustment amount of the driving assembly, the driving assembly adjusts the formwork at one time, improves the work efficiency, and avoids the safety hazards existing in repeated adjustment of the driving assembly. The measurement of the formwork, the calculation of the spatial coordinate state and the movement adjustment are all realized automatically, which reduces the errors that may be caused by personnel operation, improves the work efficiency and saves time and effort.

[0026] The cantilever pouring bridge formwork adjustment method based on spatial transformation will be described below in connection with the drawings.

[0027] Referring to Figure 1 , a front view of a formwork control measurement point scheme of the cantilever pouring bridge formwork adjustment method based on spatial transformation is shown. The cantilever pouring bridge formwork adjustment method based on spatial transformation will be described below in connection with Figure 1 .

[0028] As shown in Figure 1 , the cantilever pouring bridge formwork adjustment method based on spatial transformation includes the following steps: measuring the actual spatial state of the bridge formwork; calculating the target spatial state of the bridge formwork according to the design parameters of the bridge; calculating the transformation matrix of the bridge formwork using the actual spatial state and the target spatial state of the bridge formwork; measuring the actual position information of the driving assembly of the bridge formwork, and calculating the target position information of the driving assembly according to the transformation matrix of the bridge formwork; calculating the adjustment amount according to the actual position information and the target position information of the driving assembly, and controlling and adjusting the driving assembly using the calculated adjustment amount.

[0029] In a specific embodiment, a total station or other measuring equipment is provided to measure the current spatial state of the formwork and monitor the spatial state of the formwork in real time.

[0030] In a specific embodiment, the actual spatial state of the bridge formwork is measured, including the following steps: arranging measurement points at corresponding positions of the bridge formwork, and arranging at least three measurement points on each formwork; measuring the coordinates of the arranged measurement points to obtain actual coordinate information.

[0031] In one specific embodiment, when setting up measuring points on the bottom template, three measuring points are set at intervals at the front and rear ends of the bottom template, such as... Figure 3 As shown, the three measurement points at the front end of the bottom template are: N-BLF, N-BCF, and N-BRF, and the three measurement points at the rear end of the bottom template are: N-BLB, N-BCB, and N-BRB. The measurement points N-BLF, N-BRF, N-BLB, and N-BRB are located at the four corners of the bottom template and can also be used as measurement points for the side templates. When setting up measurement points on the two side templates, in addition to using the measurement points at the four corners of the bottom template, two measurement points are also set at the lower ends of the two flange plates of the bridge, that is, each side template includes four measurement points. The four measurement points of one side template are: N-BLF, N-BLB, N-TLF, and N-TLB, wherein measurement points N-TLF and N-TLB are located at the lower ends of the flange plates on the same side of the bridge; the four measurement points of the other side template are: N-BRF, N-BRB, N-TRF, and N-TRB, wherein measurement points N-TRF and N-TRB are located at the lower ends of the flange plates on the same side of the bridge.

[0032] In one specific implementation, the target spatial state of the bridge template is calculated based on the bridge's design parameters, including the following steps: selecting a measurement point on the corresponding template, and calculating the target coordinate information of the selected measurement point. The calculation formula and parameters are as follows:

[0033] M0 = M1 + f1 + f2 + f3

[0034] in:

[0035] M0: Target coordinate information of the measurement point;

[0036] M1: Actual coordinate information of the measurement point;

[0037] f1: The pre-camber of the bridge at the current measuring point;

[0038] f2: Elastic deformation of the hanging basket of the bridge at the current measuring point;

[0039] f3: The pouring error value of the bridge at the current measuring point;

[0040] Based on the distance between each measurement point and the pre-camber of the bridge, the target coordinate information of each measurement point is calculated.

[0041] Specifically, taking the bottom template as an example, the measurement point N-BCF at the midpoint of the front end of the bottom template is selected, and the target coordinate information of the measurement point N-BCF is calculated. The calculation formula can be expressed as follows:

[0042] H lm =H sj +fyg +f gl +f tz

[0043] Wherein:

[0044] H lm : target height of the front end of the bridge segment bottom;

[0045] H sj : actual height of the front end of the formwork;

[0046] f yg : theoretical camber of the front end of the bridge segment;

[0047] f gl : elastic deformation of the trolley at the front end of the bridge segment

[0048] f tz : height error adjustment value of the front end of the bridge segment.

[0049] The above parameters are known bridge design parameters and obtained from conventional calculations.

[0050] In a specific embodiment, the target coordinate information of other measuring points is obtained according to the target coordinate information of a measuring point. For example, the target height of N-BLF = the target height of N-BCF + the super-elevation slope of the bridge bottom horizontal curve × (1 / 2 of the bridge bottom width minus the side distance of N-BLF). Since N-BLF is located at the end of the formwork, the side distance of N-BLF is 0, so the formula can be simplified as: the target height of N-BLF = the target height of N-BCF + the super-elevation slope of the bridge bottom horizontal curve × (1 / 2 of the bridge bottom width).

[0051] In a specific embodiment, the transformation matrix of the formwork can be expressed by the following matrix:

[0052] 1) Graph scaling matrix:

[0053]

[0054] Wherein: S1, S2, S3 are the scaling ratios of each measuring point on the formwork along the XYZ three axes, respectively;

[0055] 2) Graph translation matrix:

[0056]

[0057] Wherein: T x , T y , T z are the moving distances of each measuring point on the formwork along the XYZ three axes, respectively;

[0058] 3) Graph rotation matrix:

[0059]

[0060] Where: (u, v, w) is the rotation axis, (a, b, c) is the coordinate of the rotation axis origin, and θ is the rotation angle (counterclockwise is positive) around the axis. The rotation axis (u, v, w) is a unit vector, i.e.:

[0061] u 2 +v 2 +w 2 = 1.

[0062] In a specific embodiment, the actual coordinate information of the driving assembly is brought into the transformation matrix of the template according to the above, the target coordinate information of the driving assembly can be obtained, and thus the stroke adjustment amount of the driving assembly can be obtained according to the target coordinate information and the actual coordinate information of the driving assembly.

[0063] In a preferred embodiment, the driving assembly is an oil cylinder.

[0064] In another preferred embodiment, the driving assembly is an electric push rod.

[0065] In a specific embodiment, after the driving assembly adjusts the template, the spatial coordinates of the template are measured and reviewed, and when the target position is not reached, the current spatial state of the template is calculated, the stroke adjustment amount of the driving assembly is recalculated, and the template is further adjusted.

[0066] The following takes the bottom template of the box structure commonly used in the cantilever beam as an example to describe in detail the construction method of the cantilever pouring bridge template adjustment method based on spatial transformation.

[0067] The measuring points are arranged on the bottom template, wherein three measuring points are arranged at the front end of the bottom template and three measuring points are arranged at the rear end of the bottom template. The three measuring points at the front end are N-BLF, N-BCF, and N-BRF, and the three measuring points at the rear end are N-BLB, N-BCB, and N-BRB. At the same time, the side distance of a plurality of measuring points is calculated. Then, the actual coordinate information and the height of a plurality of measuring points are measured by a total station or other measuring devices.

[0068] The target coordinate information of the measuring point N-BCF at the center of the front end of the bottom template is calculated by the existing design parameters of the bridge, and the calculation formula is as follows:

[0069] H lm = H sj + f yg + f gl + f tz

[0070] H lm : target coordinate information of the measuring point;

[0071] H sj : actual coordinate information of the measuring point;

[0072] f yg : theoretical camber of the front end of the bridge segment;

[0073] f gl : elastic deformation of the hanging basket of the front end of the bridge segment;

[0074] f tz : height error adjustment value of the front end of the bridge segment.

[0075] After the target coordinate information of the measuring point N-BCF is obtained, other measuring points of the base mold plate are calculated according to the obtained data, the width and length of the bridge and the side distance of each measuring point, so as to obtain the target coordinate information of all the measuring points on the base mold plate, and the spatial transformation matrix of the base mold plate is calculated according to the actual coordinate information and the target coordinate information of all the measuring points.

[0076] Then, the actual coordinate information of each driving assembly on the base mold plate is measured, the actual coordinate information of each driving assembly on the base mold plate is sequentially brought into the spatial transformation matrix according to the spatial transformation matrix of the base mold plate, so as to obtain the target coordinate information of the driving assembly, and the stroke adjustment amount of the driving assembly is obtained according to the actual coordinate information and the target coordinate information.

[0077] When the stroke adjustment amount of the driving assembly is calculated, the rotation matrix is:

[0078]

[0079] Wherein, v=(x, y, z) is the rotation axis, and θ is the rotation angle around the axis.

[0080] Finally, the obtained value is the stroke adjustment amount of each driving assembly, and each driving assembly is controlled to move a specified distance, so that the base mold plate can reach the specified position.

[0081] After the base mold plate is moved, the current spatial state of the base mold plate is measured, and when there is still an error, the above steps are repeated to recalculate the stroke adjustment amount of the driving assembly and continue to move and adjust the base mold plate.

[0082] The above embodiments of the application are described in detail in combination with the drawings, and those of ordinary skill in the art can make various changes to the application according to the above description. Therefore, some details in the embodiments should not constitute a limitation on the application, and the scope of protection of the application will be defined by the appended claims.

Claims

1. A method for adjusting the formwork of a cantilevered bridge based on spatial transformation, characterized in that: Includes the following steps: Measure the actual spatial condition of the bridge formwork; Calculate the target spatial state of the bridge formwork based on the bridge's design parameters; The transformation matrix of the bridge template is calculated using the actual spatial state and the target spatial state of the bridge template. The actual position information of the bridge template driving component is measured, and the target position information of the driving component is calculated based on the transformation matrix of the bridge template. The adjustment amount is calculated based on the actual position information and target position information of the drive component, and the calculated adjustment amount is used to control and adjust the drive component. Based on the bridge's design parameters, the target spatial state of the bridge formwork is calculated, including the following steps: Select a measurement point set on the corresponding template, and calculate the target coordinate information of the selected measurement point. The calculation formula and parameters are as follows: M0 = M1 + f1 + f2 + f3 in: M0: Target coordinate information of the measurement point; M1: Actual coordinate information of the measurement point; f1: The pre-camber of the bridge at the current measuring point; f2: Elastic deformation of the hanging basket of the bridge at the current measuring point; f3: The pouring error value of the bridge at the current measuring point; Based on the distance between each measurement point, the target coordinate information of each measurement point is calculated. After the drive component adjusts the template, the spatial coordinates of the template are measured and verified. If the target position is not reached, the current spatial state of the template is calculated, the stroke adjustment amount of the drive component is recalculated, and the template is further adjusted. By accurately calculating the adjustment amount of the drive component, the drive component can adjust the template in one go, improving work efficiency and avoiding the safety hazards caused by repeated adjustments of the drive component.

2. The method for adjusting the formwork of a cantilevered bridge based on spatial transformation according to claim 1, characterized in that: Measuring the actual spatial condition of the bridge formwork includes the following steps: Measurement points are set up at the corresponding positions of the bridge formwork, with at least three measurement points set up on each formwork. The coordinates of the set measurement points are measured to obtain the actual coordinate information.

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