Method for digitally surveying and mapping and analyzing rail installation of rail-mounted crane of floating dock gate seat by using total station

Abstract

The invention discloses a digital surveying and mapping analysis method for mounting a rail of a floating dock gate seat rail type crane by using a total station. The method comprises the following steps of: a, measuring data of a dock wall top deck at each rib position station at the rail through the total station; b, drawing a deflection curve of the dock wall top deck at the track in drawing software in a spline curve fitting mode according to the data; c, selecting a reference thickness cushion block value and a design slope value; d, linearly arranging the steel rails in the drawing software; e, measuring the accurate thickness value of the cushion block at the required position; according to the method for mounting the rail-mounted crane rail on the floating dock gate seat by using the digital surveying and mapping analysis method of the total station, repeated remanufacturing of cushion blocks with different thicknesses can be avoided, and in order to ensure the mounting precision of the crane rail, the mounting and adjusting working hours of the crane rail in a shipyard site are greatly reduced, so that the docking period is shortened.

Description

Technical Field

[0001] This invention relates to a digital surveying and analysis method using a total station for the installation of a rail-mounted crane with a floating dock portal. Background Technology

[0002] To meet the production and hoisting needs of ship repair and construction in floating docks, gantry-type rail-mounted cranes are installed on the top deck of the dock walls. To ensure stable operation of the gantry cranes on straight tracks and to prevent motor burnout due to excessive track slope, the ratio of the vertical height to the horizontal length of the track slope is specified to not exceed 0.003. In actual use, the crane track slope needs to comprehensively consider both the deflection of the floating dock's main hull and the track slope; it is a comprehensive deflection. Most floating docks, when undertaking ship repair or construction, generally control their own deflection within 0.002 based on their respective load-bearing capacities. To ensure the crane track slope does not exceed 0.003, the actual laying of the crane tracks... The slope needs to be controlled to no more than 0.001. To achieve this accuracy requirement, considering the height difference and local depressions or protrusions on the deck of the dock wall when the floating dock is assembled in sections, the usual practice is to lay a large number of pads of different thicknesses under the rails to ensure the slope of the rails. The traditional method of making these pads is to extract the pad thickness data by simulating the rail layout by pulling steel wire ropes. However, due to the sag of the steel wire ropes, the sag is greater the longer the diameter and length of the steel wire rope. Therefore, the accuracy of the pad thickness data extracted by simulating the rail layout by pulling steel wire ropes is poor. When installing the pads, it is necessary to adjust according to the actual situation on site and repeatedly remake pads of different thicknesses, resulting in a lot of waste of manpower and material resources. Summary of the Invention

[0003] The purpose of this invention is to provide a digital surveying and analysis method using a total station for the installation of rail-mounted cranes with floating dock portal frames, which can ensure precision control during crane rail installation and reduce the manufacturing cost of rail pads.

[0004] The technical solution adopted by this invention to achieve the above objectives is: a method for digital surveying and analysis using a total station for the installation of a rail-mounted crane on a floating dock portal, comprising the following steps: a. Measure the data at each rib station on the track using a total station on the top deck of the dock wall; b. Using this data, plot the deflection curve of the top deck of the dock wall at the track using spline curve fitting in the plotting software; c. Select the reference rail pad thickness and the minimum rail pad thickness, determine the crane rail accuracy design value based on the thickness of the top deck of the dock wall, and finally select the reference thickness pad value and the design slope value; d. In the drawing software, select points with more flat straight lines on the top deck surface of the dock wall to place reference thickness pads, and place thin rail pads at the protruding points on the top deck surface of the dock wall. Under the premise of meeting the accuracy control, use straight lines to simulate the laying of crane rails and arrange the rails in straight lines in the drawing software. e. Take the block thickness data for each required location, and statistically combine the block thicknesses according to a tolerance of ±2mm to measure the accurate block thickness value for the required location.

[0005] In step a, the bow and stern endpoints of the track laying location on the side of the target dock wall are selected as two reference points. Then, the bow or stern endpoint of the track laying location on the other side of the floating dock wall is selected as another reference point. The plane determined by the above three points is used as the reference plane and stored in the total station. Then, the target is placed at each rib station on the top deck track of the dock wall, and the data read by the total station is entered into a data table with rib numbers.

[0006] The data read by the total station is the height value between the target and the reference plane. The data on the reference plane is a positive value, and the data below the reference plane is a negative value.

[0007] In step b, the data table with rib numbers is converted into distance coordinate values ​​that can be imported into drawing software in EXCEL. Then, the deflection curve of the top deck of the dock wall at the track is drawn by spline curve fitting and the curve is optimized.

[0008] This invention provides a digital surveying and analysis method using a total station for the installation of rail-mounted cranes on floating dock portals. This method avoids the need to repeatedly remake pads of different thicknesses and to ensure the installation accuracy of the crane rails, significantly reducing the time spent on crane rail installation and adjustment at the shipyard site, thereby saving docking time. Attached Figure Description

[0009] Figure 1 This invention relates to a table showing the correspondence between wire diameter and counterweight of a rail-mounted crane with a floating dock portal frame, using a total station for digital surveying and analysis.

[0010] Figure 2 This invention relates to a data table of wire rope deflection for the installation of a rail-mounted crane using a total station for digital surveying and analysis.

[0011] Figure 3 This invention relates to a data recording table for each rib station at the track of a floating dock portal rail-mounted crane, using a total station for digital surveying and analysis.

[0012] Figure 4This invention relates to a scatter plot of the top deck of a floating dock gate rail-mounted crane track installation method using a total station for digital surveying and analysis, showing the scatter plot at the track.

[0013] Figure 5 This invention relates to a scheme for simulating the arrangement of straight rails and pad blocks in the deflection curve of the dock wall deck using a total station digital surveying and analysis method for the installation of a rail-mounted crane on a floating dock portal.

[0014] Figure 6 This invention relates to a data recording table of the actual thickness of rail pad blocks for the installation of rails of a floating dock portal rail-mounted crane using a total station digital surveying and analysis method. Detailed Implementation

[0015] like Figures 1 to 6 As shown, the installation of the rail-mounted crane track on the floating dock portal utilizes a total station digital surveying and analysis method, including the following steps: a. Measure the data of each rib station on the track at the top deck of the dock wall using a total station. Select the bow and stern endpoints of the track laying location on the target dock wall side as two reference points. Then, select the bow or stern endpoint of the track laying location on the other side of the floating dock wall as another reference point. Use the plane determined by the above three points as the reference plane and input it into the total station for storage. Then, place the target at each rib station on the track at the top deck of the dock wall and input the data read by the total station into a pre-defined data table with rib numbers. The data read by the total station is the height value between the target and the reference plane. Data on the reference plane is positive, and data below the reference plane is negative. b. Convert the data table with rib numbers into distance coordinate values ​​that can be imported into the plotting software. Use this data to plot the deflection curve of the dock wall top deck at the rail using spline curve fitting in the plotting software, and then optimize the curve. c. Select the reference rail pad thickness and the minimum rail pad thickness. Determine the crane rail accuracy design value based on the dock wall top deck thickness, and finally select the reference thickness pad value and the design slope value. d. In the plotting software, select points with more flat straight lines on the dock wall top deck surface to place reference thickness pads, and place thinner rail pads at the protruding points on the dock wall top deck. Under the premise of meeting accuracy control, simulate the crane rail laying using straight lines, and perform the straight rail layout in the plotting software. Figure 5As shown, 1 is the pad block location number, 2 is the high point location marker rib station, 3 is the minimum pad block height value, 4 is the deck deflection curve, and 5 is the simulated straight line of the rail; e. Take the pad block thickness data for each required location, and statistically merge the pad block thickness according to a tolerance of ±2mm to measure the accurate pad block thickness value for the required location; The present invention utilizes a total station digital surveying and analysis method for the installation of the floating dock portal rail crane, which can avoid repeatedly remaking pad blocks of different thicknesses and significantly reduce the time spent on crane rail installation and adjustment at the shipyard site to ensure the accuracy of crane rail installation, thereby saving docking time.

Claims

1. A method for digital surveying and analysis using a total station for the installation of a rail-mounted crane on a floating dock portal, characterized in that... Includes the following steps: a. Measure the data at each rib station on the track using a total station on the top deck of the dock wall; b. Using this data, plot the deflection curve of the top deck of the dock wall at the track using spline curve fitting in the plotting software; c. Select the reference rail pad thickness and the minimum rail pad thickness, determine the crane rail accuracy design value based on the thickness of the top deck of the dock wall, and finally select the reference thickness pad value and the design slope value; d. In the drawing software, select points with more flat straight lines on the top deck surface of the dock wall to place reference thickness pads, and place thin rail pads at the protruding points on the top deck surface of the dock wall. Under the premise of meeting the accuracy control, use straight lines to simulate the laying of crane rails and arrange the rails in straight lines in the drawing software. e. Take the block thickness data for each required location, and statistically combine the block thicknesses according to a tolerance of ±2mm to measure the accurate block thickness value for the required location.

2. The method for digital surveying and analysis using a total station for the installation of a rail-mounted crane on a floating dock portal as described in claim 1, characterized in that: In step a, the bow and stern endpoints of the track laying location on the side of the target dock wall are selected as two reference points. Then, the bow or stern endpoint of the track laying location on the other side of the floating dock wall is selected as another reference point. The plane determined by the above three points is used as the reference plane and stored in the total station. Then, the target is placed at each rib station on the top deck track of the dock wall, and the data read by the total station is entered into a data table with rib numbers.

3. The method for digital surveying and analysis using a total station for track installation of a floating dock portal rail-mounted crane according to claim 2, characterized in that: The data read by the total station is the height value between the target and the reference plane. The data on the reference plane is a positive value, and the data below the reference plane is a negative value.

4. The method for digital surveying and analysis using a total station for track installation of a floating dock portal rail-mounted crane according to claim 1, characterized in that: In step b, the data table with rib numbers is converted into distance coordinate values ​​that can be imported into drawing software in EXCEL. Then, the deflection curve of the top deck of the dock wall at the track is drawn by spline curve fitting and the curve is optimized.

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