Rapid measuring and positioning device for steering saddle of extradosed cable-stayed bridge and positioning method of rapid measuring and positioning device
By using a rapid measurement and positioning device with components such as four-toward targets and a central target in a low-tower cable-stayed bridge, the precise installation of the steering saddle is achieved, solving the problems of low measurement accuracy and frequent manual intervention in the existing technology, and improving construction efficiency and safety.
Patent Information
- Application Number
- CN202510710910.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-09-09
AI Technical Summary
In the existing technology of the cable anchorage system of low-tower cable-stayed bridges, the measurement and positioning accuracy of the steering saddle is low and there are many manual intervention factors, which leads to slow construction speed and makes it difficult to meet safety, quality and progress requirements.
A rapid measurement and positioning device for the steering saddle of a low-tower cable-stayed bridge is used, which includes four targets, a central target, a target-matching prism, a connecting rod and a magnetic ring. Through unmanned data collection and three-dimensional coordinate acquisition, the precise positioning of the steering saddle is achieved.
It improves the installation efficiency of the steering saddle, reduces manual intervention errors, reduces the risk of high-altitude operations, realizes green and energy-saving construction, and ensures the safety and service life of the bridge structure.
Smart Images
Figure CN120608462A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of construction measurement of a cable anchoring system of a low-tower cable-stayed bridge, and in particular to a rapid measurement and positioning device for a tower end steering saddle of a cable anchoring system of a low-tower cable-stayed bridge and a positioning method thereof. Background Art
[0002] The cable anchorage system of low-tower cable-stayed bridges is complex. The positioning accuracy of the tower-end steering saddles directly affects the spatial orientation of the cables, and thus the stability of the entire bridge's load-bearing system, as well as its safety and lifespan. Currently, the precise measurement and positioning of steering saddles relies on indirect positioning methods, which involve numerous manual interventions, require extensive on-site data collection and calculations, are slow to adjust, and offer limited overall positioning accuracy. This method no longer meets the current safety, quality, and schedule requirements for low-tower cable-stayed bridge construction.
[0003] In order to improve the measurement and positioning efficiency of the steering saddle at the tower end of the cable anchoring system of a low-tower cable-stayed bridge and ensure the measurement and positioning accuracy of the steering saddle, it is urgent to develop a rapid measurement and positioning device and positioning method for the steering saddle of a low-tower cable-stayed bridge. Summary of the Invention
[0004] The first purpose of the present invention is to provide a rapid measurement and positioning device for the steering saddle of a low-tower cable-stayed bridge. The device can realize the rapid installation and precise positioning installation of the steering saddle, greatly improving the installation efficiency and laying a reliable foundation for the safety of the bridge structure and operational safety within the designed service life cycle.
[0005] The second purpose of the present invention is to provide a method for rapid measurement and positioning of the steering saddle of a low-tower cable-stayed bridge. The method can realize unmanned front-point data collection for precise positioning of the steering saddle installation, reduce the impact of measurement errors caused by manual intervention at the front point, and simultaneously achieve a reduction in the number of operators on high-altitude narrow working platforms, reduce the safety risks of surveyors working at high altitudes for a long time, and achieve the goal of green and energy-saving construction.
[0006] The first object of the present invention is achieved in this way: A device for quickly measuring and positioning a steering saddle of a low-tower cable-stayed bridge is characterized by comprising: four targets, a central target, target-matching prisms, connecting rods at the ends of the four targets, a connecting rod at the end of the central target, magnetic rings for the four targets, and a magnetic ring for the central target, wherein: The four four-direction targets and one central target are all assembly matrices of uniform shape and structural dimensions. An upwardly opening four-direction target prism pre-set hole is provided in the middle of the top of each four-direction target. An upwardly opening four-direction target magnetic ring pre-set groove is provided on the top of the four-direction target and between the four-direction target prism pre-set hole and the outer wall of the four-direction target. A four-direction target connecting rod pre-set screw hole is provided on the outer wall of the four-direction target, which passes through the outer wall of the four-direction target and is connected to the four-direction target magnetic ring pre-set groove. A four-direction target magnetic ring pre-set groove alignment mark is provided on the upper edge of the four-direction target. The four-target magnetic ring is a ring body with an inner diameter slightly larger than the inner diameter of the four-target magnetic ring reserved groove and an outer diameter slightly larger than the outer diameter of the four-target magnetic ring reserved groove, so that the four-target magnetic ring is just embedded in the four-target magnetic ring reserved groove from top to bottom, and a four-target magnetic ring connecting rod reserved screw hole with the same hole diameter as the four-target connecting rod reserved screw hole is provided on the outer side wall of the four-target magnetic ring, and a four-target magnetic ring alignment mark is provided on the upper edge of the four-target magnetic ring, which is aligned with the four-target magnetic ring reserved groove alignment mark; An upwardly opening center target prism pre-set hole is provided in the middle of the upper portion of the center target; an upwardly opening center target magnetic ring pre-set groove is provided on the upper portion of the center target, between the center target prism pre-set hole and the outer side wall of the center target; a center target connecting rod pre-set screw hole is provided on the outer side wall of the center target and on the vertical and horizontal cross lines, penetrating the outer side wall of the center target and communicating with the center target magnetic ring pre-set groove; a center target magnetic ring pre-set groove alignment mark is provided on the upper edge of the center target; The center target magnetic ring is a ring body with an inner diameter slightly larger than the inner diameter of the center target magnetic ring reserved groove and an outer diameter slightly larger than the outer diameter of the center target magnetic ring reserved groove, so that the center target magnetic ring is just embedded in the center target magnetic ring reserved groove from top to bottom. Four center target magnetic ring connecting rod reserved screw holes with the same diameter as the center target connecting rod reserved screw holes and positions corresponding to the four center target connecting rod reserved screw holes are evenly provided on the outer side wall of the center target magnetic ring. A center target magnetic ring alignment mark is provided on the upper edge of the center target magnetic ring, which is aligned with the center target magnetic ring reserved groove alignment marks of the four center targets. Insert target matching prisms into four reserved holes for target prisms and one reserved hole for central target prism respectively. After the target matching prisms are inserted into the holes, the hole walls of the four reserved holes for target prisms and the reserved hole for central target prism should be in close contact with the target matching prisms. Embed a four-target magnetic ring in the four-target magnetic ring reserved groove of each four-target, the groove wall of the four-target magnetic ring reserved groove must be tightly attached to the ring wall of the four-target magnetic ring, and the four-target magnetic ring reserved groove alignment mark and the four-target magnetic ring alignment mark must match and coincide, at this time, the four-target connecting rod reserved screw holes and the four-target magnetic ring connecting rod reserved screw holes are on the same axis; embed the central target magnetic ring in the central target magnetic ring reserved groove of the central target, the groove wall of the central target magnetic ring reserved groove must be tightly attached to the ring wall of the central target magnetic ring, and the center target magnetic ring reserved groove alignment mark and the center target magnetic ring alignment mark must match and coincide, at this time, the four cross-shaped central target connecting rod reserved screw holes and the corresponding four central target magnetic ring connecting rod reserved screw holes are all on the same axis; The inner end of the center target end connecting rod is provided with an external thread matching the reserved screw hole of the center target connecting rod, and the outer end of the center target end connecting rod is provided with a center target end connecting rod sleeve opening outward, and the outer ends of the four end target connecting rods are provided with external threads matching the reserved screw holes of the four end target connecting rods. The inner ends of the four end target connecting rods are light rods that can be inserted into and tightly matched with the center target end connecting rod sleeve; the inner ends of the four center target end connecting rods are respectively screwed into the four center target connecting rod reserved screw holes on the outer side wall of the center target from the outside to the inside, and the inner end of each center target end connecting rod passes through the corresponding center target connecting rod reserved screw hole and is screwed into the center target magnetic ring connecting rod reserved screw hole corresponding to the center target magnetic ring for fixation, so that the center target end connecting rod will fix the center The target and the center target magnetic ring are fixed as one; the outward end of each four-end target connecting rod is screwed into the reserved screw hole of the four-target connecting rod on the outer wall of the four-target from the outside to the inside, and the outward end of each four-end target connecting rod passes through the corresponding reserved screw hole of the four-target connecting rod and is screwed into the reserved screw hole of the four-target magnetic ring connecting rod corresponding to the four-target magnetic ring for fixation, so that the four-end target connecting rod fixes the four targets and the four-target magnetic ring as one; the inward ends of the four four-end target connecting rods are respectively inserted into the center target end connecting rod sleeves corresponding to the four center target end connecting rods, so that the four four-targets and one center target are connected together through the four center target end connecting rods and the four four-end target connecting rods, and a center target is located in the center of the four four-target targets in the cross shape.
[0007] Furthermore, the axis connected by the reserved screw holes of the four-to-target connecting rods of the upper four-to-target and the reserved screw holes of the four-to-target connecting rods of the lower four-to-target and the axis connected by the reserved screw holes of the four-to-target connecting rods of the left four-to-target and the reserved screw holes of the four-to-target connecting rods of the right four-to-target must be absolutely vertical.
[0008] Furthermore, the four target end connecting rods and the central target end connecting rod must be manufactured to be concentric and coaxial, and when the four target end connecting rods are inserted into the central target end connecting rod sleeve of the central target end connecting rod, the outer wall of the four target end connecting rods must be in close contact with the inner wall of the central target end connecting rod sleeve.
[0009] Furthermore, the four target end connecting rods and the central target end connecting rod must be manufactured to be concentric and coaxial.
[0010] The device acquires the three-dimensional coordinate data of the steering saddle's spatial posture through an assembly of four targets, a central target and target matching prisms, four target magnetic rings, a central target magnetic ring, four target end connecting rods, and a central target end connecting rod.
[0011] The target supporting prism is a small prism of uniform model, which is a device for obtaining the three-dimensional coordinate data of the spatial posture of the steering saddle. The prism constants of the target supporting prism must be consistent and must be calibrated before use.
[0012] The second object of the present invention is achieved in this way: A method for quickly measuring and locating a turning saddle of a low-tower cable-stayed bridge is characterized by the following specific steps: A. Layout of control points for the main tower construction densification network: With the central axis of the main tower as the baseline, a pair of main tower construction densification network control points are set at appropriate locations upstream and downstream on both sides of the water area to form a geodetic quadrilateral network. These points are measured in conjunction with the precision control points CPI and CPII near the work site to obtain the plane coordinates of the four main tower construction densification network control points. At the same time, the above four main tower construction densification network control points are measured in conjunction with the leveling base points of the line near the work site to obtain the elevation results of the four main tower construction densification network control points. The four main tower construction densification network control points are numbered DQ1, DQ2, DQ3, and DQ4, of which DQ1 and DQ2 are located upstream of the main tower central axis water area, and DQ3 and DQ4 are located downstream of the central axis water area of the middle tower. The points are arranged counterclockwise on the plane. B. Assembly of the positioning device: First, embed a target matching prism in each of the four four-target prism reserved holes and one central target prism reserved hole; second, embed a four-target magnetic ring in each of the four four-target magnetic ring reserved grooves, and the alignment marks of the four-target magnetic ring reserved grooves and the four-target magnetic ring alignment marks must match and overlap; embed a central target magnetic ring in a central target magnetic ring reserved groove, and the alignment marks of the central target magnetic ring reserved groove and the central target magnetic ring alignment marks must match and overlap; third, screw the central target end connecting rod into the four central target connecting rod reserved screw holes, and at the same time, screw the inward end of the central target end connecting rod into the central target magnetic ring connecting rod reserved screw hole for fixation; in the four sets of four-target connecting rod reserved screw holes The four target end connecting rods are screwed into the holes respectively, and the outward ends of the four target end connecting rods are screwed into the reserved screw holes of the four target magnetic ring connecting rods for fixation; fourth, the inward ends of the four four target connecting rods are respectively inserted into the center target end connecting rod sleeves of the four center target end connecting rods facing outward, and according to the distance from the center hole of the steering saddle anchor plate wire tube hole group to the upper, lower, left and right edge holes, the four target end connecting rods are adjusted to adjust the center distance of the target matching prism of the center target to the center distance of the target matching prism of the four targets; fifth, the assembled and adjusted positioning device is matched and aligned with the steering saddle anchor plate wire tube hole group, and the positioning device is adsorbed on the anchor plate using four four target magnetic rings and one center target magnetic ring, and the installation and positioning work of the steering saddle can be carried out; C. Two 0.5″ high-precision total stations were used on site to set up stations and orient themselves at control points DQ1 and DQ3 of the main tower construction density network on both sides of the water area, with each station looking back at control points DQ2 and DQ4 of the main tower construction density network on the opposite bank. After the station setting and orientation were completed, the three-dimensional coordinates of the four target supporting prisms and one target supporting prism of the center target of the positioning device adsorbed on the anchor pads at the front and rear ends of the steering saddle were collected by the total stations on both sides, and compared with the design coordinates to calculate the coordinate difference. D. The workers at the work site shall adjust the elevation deviation of the anchor plate of the steering saddle according to the difference in coordinates of the left and right four-point targets; adjust the lateral deviation of the anchor plate of the steering saddle according to the difference in coordinates of the upper and lower four-point targets; and adjust the line direction deviation of the anchor plate of the steering saddle according to the difference in coordinates of the center target; E. After the rough adjustment is completed, roughly limit the steering saddle; repeat steps C and D to fine-tune and lock the spatial posture of the steering saddle; F. Finally, the three-dimensional coordinate measurement data of the positioning device adsorbed on the anchor pads at the front and rear ends of the steering saddle is collected to determine whether the various parameter indicators of the spatial posture of the steering saddle meet the standard tolerance requirements, thereby achieving rapid and accurate positioning of the steering saddle.
[0013] The rapid measurement and positioning device for the steering saddle of a low-tower cable-stayed bridge of the present invention comprises four targets, a central target, a target-matching prism, four-target end connecting rods, a central target end connecting rod, four-target magnetic rings, and a central target magnetic ring. The positioning device and its method can realize unmanned data collection before the precise positioning of the steering saddle installation, reduce the influence of measurement errors caused by manual intervention at the front point, and simultaneously realize the reduction of operators on high-altitude narrow working platforms, reduce the safety risks of surveyors working at high altitudes for a long time, and achieve the goal of green and energy-saving construction. At the same time, the spatial relative position relationship and absolute position of the steering saddle can be quickly adjusted on site, and the adjustment strategy can be quickly given by comparing with the design coordinates. The components of the positioning device can be mass-produced and reused. Combined with the measurement method, the steering saddle can be installed in batches, quickly installed, and accurately positioned, greatly improving the efficiency of the installation operation, and laying a reliable foundation for the safety of the bridge structure and operational safety within the designed service life cycle. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is the overall structural diagram of the device of the present invention; Figure 2 Schematic diagram of the device of the present invention, wherein: a is a schematic diagram of the structure of the four targets, b is a schematic diagram of the structure of the central target, c is a schematic diagram of the structure of the target supporting prism, d is a schematic diagram of the structure of the connecting rods at the ends of the four targets, e is a schematic diagram of the structure of the connecting rod at the end of the central target, f is a schematic diagram of the structure of the magnetic rings of the four targets, and g is a schematic diagram of the structure of the magnetic ring of the central target; Figure 3 This is the elevation detail of the steering saddle anchor pad; Figure 4 This is the overall layout diagram of the total station orientation surveying station of the positioning method of the present invention; Figure 5 Schematic diagram of the positioning method of the present invention. DETAILED DESCRIPTION
[0015] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings.
[0016] A device for quickly measuring and positioning a steering saddle of a low-tower cable-stayed bridge comprises: four targets 1, a central target 2, a target-matching prism 3, connecting rods 4 at the ends of the four targets, a connecting rod 5 at the end of the central target, magnetic rings 6 at the four targets, and a magnetic ring 7 at the central target, wherein: The four four-targets 1 and one central target 2 are all assembly matrices of uniform shape and structural dimensions. An upwardly opening four-target prism pre-set hole 8 is provided in the middle of the top of each four-target 1. An upwardly opening four-target magnetic ring pre-set groove 10 is provided on the top of the four-target 1 and between the four-target prism pre-set hole 8 and the outer wall of the four-target 1. A four-target connecting rod pre-set screw hole 18 is provided on the outer wall of the four-target 1, which passes through the outer wall of the four-target 1 and is connected to the four-target magnetic ring pre-set groove 10. A four-target magnetic ring pre-set groove alignment mark 11 is provided on the upper edge of the four-target 1. The four-target magnetic ring 6 is a ring body with an inner diameter slightly larger than the inner diameter of the four-target magnetic ring reserved groove 10 and an outer diameter slightly larger than the outer diameter of the four-target magnetic ring reserved groove 10, so that the four-target magnetic ring 6 is just embedded in the four-target magnetic ring reserved groove 10 from top to bottom, and a four-target magnetic ring connecting rod reserved screw hole 19 with the same aperture as the four-target connecting rod reserved screw hole 18 is provided on the outer side wall of the four-target magnetic ring 6, and a four-target magnetic ring alignment mark 12 aligned with the four-target magnetic ring reserved groove alignment mark 11 is provided on the upper edge of the four-target magnetic ring 6; An upwardly opening center target prism pre-set hole 9 is provided in the middle of the upper surface of the center target 2; an upwardly opening center target magnetic ring pre-set groove 13 is provided on the upper surface of the center target 2 and between the center target prism pre-set hole 9 and the outer side wall of the center target 2; a center target connecting rod pre-set screw hole 16 is provided on the outer side wall of the center target 2 and on the vertical and horizontal cross lines, penetrating the outer side wall of the center target 2 and communicating with the center target magnetic ring pre-set groove 13; a center target magnetic ring pre-set groove alignment mark 14 is provided on the upper edge of the center target 2; The center target magnetic ring 7 is a ring body with an inner diameter slightly larger than the inner diameter of the center target magnetic ring reserved groove 13 and an outer diameter slightly larger than the outer diameter of the center target magnetic ring reserved groove 13, so that the center target magnetic ring 7 is just embedded in the center target magnetic ring reserved groove 13 from top to bottom. Four center target magnetic ring connecting rod reserved screw holes 17 with the same aperture as the center target connecting rod reserved screw holes 16 and positions corresponding to the four center target connecting rod reserved screw holes 16 are evenly provided on the outer side wall of the center target magnetic ring 7. A center target magnetic ring alignment mark 15 is provided on the upper edge of the center target magnetic ring 7 and is aligned with the center target magnetic ring reserved groove alignment mark 14 of the center target 2; Insert target matching prisms 3 into four reserved holes 8 for four target prisms and one reserved hole 9 for central target prism respectively. After the target matching prisms 3 are inserted into the holes, the hole walls of the four reserved holes 8 for target prisms and the reserved hole 9 for central target prism should be in close contact with the target matching prisms 3. A four-target magnetic ring 6 is embedded in the four-target magnetic ring reserved groove 10 of each four-target 1, and the groove wall of the four-target magnetic ring reserved groove 10 must be tightly attached to the ring wall of the four-target magnetic ring 6, and the four-target magnetic ring reserved groove alignment mark 11 and the four-target magnetic ring alignment mark 12 must match and overlap, at this time, the four-target connecting rod reserved screw hole 18 and the four-target magnetic ring connecting rod reserved screw hole 19 are on the same axis; the central target magnetic ring 7 is embedded in the central target magnetic ring reserved groove 13 of the central target 2, and the groove wall of the central target magnetic ring reserved groove 13 must be tightly attached to the ring wall of the central target magnetic ring 7, and the central target magnetic ring reserved groove alignment mark 14 and the central target magnetic ring alignment mark 15 must match and overlap, at this time, the four cross-shaped central target connecting rod reserved screw holes 16 and the corresponding four central target magnetic ring connecting rod reserved screw holes 17 are all on the same axis; The inner end of the center target end connecting rod 5 is provided with an external thread matching the center target connecting rod reserved screw hole 16, and the outer end of the center target end connecting rod 5 is provided with a center target end connecting rod sleeve 20 opening outward, and the outer ends of the four end target connecting rods 4 are provided with external threads matching the four end target connecting rod reserved screw holes 18, and the inner ends of the four end target connecting rods 4 are light rods that can be inserted into and tightly matched with the center target end connecting rod sleeve 20; the inner ends of the four center target end connecting rods 5 are respectively screwed into the four center target connecting rod reserved screw holes 16 on the outer side wall of the center target 2 from the outside to the inside, and the inner end of each center target end connecting rod 5 passes through the corresponding center target connecting rod reserved screw hole 16 and is simultaneously screwed into the center target magnetic ring connecting rod reserved screw hole 17 corresponding to the center target magnetic ring 7 for fixation, so that the center target end connecting rod 5 will fix the center target The target 2 and the center target magnetic ring 7 are fixed as a whole; the outward end of each four-end target connecting rod 4 is screwed into the four-target connecting rod reserved screw hole 18 on the outer side wall of the four-target 1 from the outside to the inside, and the outward end of each four-end target connecting rod 4 passes through the corresponding four-target connecting rod reserved screw hole 18 and is screwed into the four-target magnetic ring connecting rod reserved screw hole 19 corresponding to the four-target magnetic ring 6 for fixation, so that the four-end target connecting rod 4 fixes the four targets 1 and the four-target magnetic ring 6 as a whole; the inward ends of the four four-end target connecting rods 4 are respectively inserted into the center target end connecting rod sleeves 20 corresponding to the four center target end connecting rods 5, so that the four four-end targets 1 and one center target 2 are connected together by the four center target end connecting rods 5 and the four four-end target connecting rods 4, and a center target 2 is located at the center of the four four-target targets 1 in the cross shape.
[0017] The axis connected by the reserved screw holes 18 of the four-to-target connecting rods of the upper four-to-target 1 and the reserved screw holes 18 of the four-to-target connecting rods of the lower four-to-target 1 and the axis connected by the reserved screw holes 18 of the four-to-target connecting rods of the left four-to-target 1 and the reserved screw holes 18 of the four-to-target connecting rods of the right four-to-target 1 must be absolutely vertical.
[0018] The four target end connecting rods 4 and the central target end connecting rod 5 must be made concentric and coaxial. When the four target end connecting rods 4 are inserted into the central target end connecting rod sleeve 20 of the central target end connecting rod 5, the outer wall of the four target end connecting rods 4 must be in close contact with the inner wall of the central target end connecting rod sleeve 20.
[0019] The connecting rods 4 to the target end and the connecting rods 5 at the center target end must be made concentric and coaxial.
[0020] This device acquires the three-dimensional coordinate data of the spatial posture of the steering saddle 24 by assembling and combining four target groups 1, a central target group 2, a target matching prism 3, four target magnetic rings 6, a central target magnetic ring 7, four target end connecting rods 4, and a central target end connecting rod 5.
[0021] The target supporting prism 3 is a small prism of a uniform model, and is a device for obtaining the three-dimensional coordinate data of the spatial posture of the steering saddle 24. The prism constants of the target supporting prism 3 must be consistent and must be verified before use.
[0022] The assembly process of a quick measurement and positioning device for a steering saddle of a low-tower cable-stayed bridge includes: The first step is to embed a target matching prism 3 in each of the four target prism reserved holes 8 and the central target prism reserved hole 9; The second step is to embed a four-target magnetic ring 6 in each of the four four-target magnetic ring reserved grooves 10, and the four-target magnetic ring reserved groove alignment marks 11 and the four-target magnetic ring alignment marks 12 must match and overlap; embed a central target magnetic ring 7 in a central target magnetic ring reserved groove 13, and the central target magnetic ring reserved groove alignment marks 14 and the central target magnetic ring alignment marks 15 must match and overlap; The third step is to screw the center target end connecting rod 5 into the four center target connecting rod reserved screw holes 16 respectively, and at the same time, screw the inward end of the center target end connecting rod 5 into the center target magnetic ring connecting rod reserved screw hole 17 for fixation; screw the four end target connecting rods 4 into the four target connecting rod reserved screw holes 18 of the four sets of four targets 1 respectively, and at the same time, screw the outward end of the four end target connecting rod 4 into the four target magnetic ring connecting rod reserved screw holes 19 for fixation; The fourth step is to insert the inner ends of the four four-target connecting rods 4 into the center target end connecting rod sleeves 20 of the four center target end connecting rods 5. According to the distance from the center hole 21 of the steering saddle anchor plate wire tube hole group to the upper, lower, left and right edge holes 22, the center of the target matching prism 3 of the center target 2 to the center of the target matching prism 3 of the four-target 1 is adjusted through the four-end target connecting rods 4. The fifth step is to match the assembled and adjusted positioning device 25 with the center hole 21 of the wire tube hole group and the upper, lower, left and right edge holes 22 of the steering saddle anchor plate respectively, and use four four-to-target magnetic rings 6 and a center target magnetic ring 7 to adsorb the positioning device 25 on the anchor plate 23, and then the installation and positioning work of the steering saddle 24 can be carried out.
[0023] A method for quickly measuring and locating a turning saddle of a low-tower cable-stayed bridge, the specific steps are as follows: A. Layout of control points for the main tower construction densification network: With the central axis of the main tower as the baseline, a pair of main tower construction densification network control points are set at appropriate locations upstream and downstream on both sides of the water area to form a geodetic quadrilateral network. These points are measured in conjunction with the precision control points CPI and CPII near the work site to obtain the plane coordinates of the four main tower construction densification network control points. At the same time, the above four main tower construction densification network control points are measured in conjunction with the leveling base points of the line near the work site to obtain the elevation results of the four main tower construction densification network control points. The four main tower construction densification network control points are numbered DQ1, DQ2, DQ3, and DQ4, of which DQ1 and DQ2 are located upstream of the main tower central axis water area, and DQ3 and DQ4 are located downstream of the central axis water area of the middle tower. The points are arranged counterclockwise on the plane. B. After assembling the positioning device 25 and matching it with the center hole 21 of the branching tube hole group and the upper, lower, left, and right edge holes 22 of the anchor pads 23 at the front and rear ends of the steering saddle 24, two 0.5″ high-precision total stations are used on site to set up stations and orient themselves at the control points DQ1 and DQ3 of the main tower construction density network on both sides of the water area, and each looks back at the control points DQ2 and DQ4 of the main tower construction density network on the opposite bank; after the station setting and orientation are completed, the three-dimensional coordinates of the four target matching prisms 3 of the positioning device 25 adsorbed on the anchor pads 23 at the front and rear ends of the steering saddle 24 and the target matching prism 3 of the center target 2 are collected by the total stations on both sides, and compared with the design coordinates to calculate the coordinate difference; C. The work site operator adjusts the elevation deviation of the anchor plate 23 of the steering saddle 24 according to the difference in coordinates of the left and right four-point targets 1; adjusts the lateral deviation of the anchor plate 23 of the steering saddle 24 according to the difference in coordinates of the upper and lower four-point targets 1; and adjusts the line direction deviation of the anchor plate 23 of the steering saddle 24 according to the difference in coordinates of the center target 2; D. After the rough adjustment is completed, the steering saddle 24 is roughly limited; repeat the above work to fine-tune and lock the spatial posture of the steering saddle 24; E. Finally, the positioning device 25 adsorbed on the anchor pads 23 at the front and rear ends of the steering saddle 24 is subjected to a three-dimensional coordinate measurement data collection to determine whether the various parameters of the spatial posture of the steering saddle 24 meet the specification tolerance requirements, thereby achieving rapid and accurate positioning of the steering saddle 24.
[0024] The completion of the present invention is not limited to the rapid measurement and positioning of the turning saddle of a low-tower cable-stayed bridge. Any site type with similar scenarios is within the scope of the present invention, which can not only ensure the positioning measurement accuracy, but also improve the working efficiency.
[0025] The above are only preferred feasible implementation cases of the present invention, and are not intended to limit the scope of rights of the present invention. All uses of the present invention's description and drawings are included in the scope of rights of the present invention.
Claims
1. A rapid measurement and positioning device for a steering saddle of a low-tower cable-stayed bridge, characterized by: include: Four targets, central target, target matching prism, four target end connecting rods, central target end connecting rod, four target magnetic rings, central target magnetic ring, including: The four four-direction targets and one central target are all assembly matrices of uniform shape and structural dimensions. An upwardly opening four-direction target prism pre-set hole is provided in the middle of the top of each four-direction target. An upwardly opening four-direction target magnetic ring pre-set groove is provided on the top of the four-direction target and between the four-direction target prism pre-set hole and the outer wall of the four-direction target. A four-direction target connecting rod pre-set screw hole is provided on the outer wall of the four-direction target, which passes through the outer wall of the four-direction target and is connected to the four-direction target magnetic ring pre-set groove. A four-direction target magnetic ring pre-set groove alignment mark is provided on the upper edge of the four-direction target. The four-target magnetic ring is a ring body with an inner diameter slightly larger than the inner diameter of the four-target magnetic ring reserved groove and an outer diameter slightly larger than the outer diameter of the four-target magnetic ring reserved groove, so that the four-target magnetic ring is just embedded in the four-target magnetic ring reserved groove from top to bottom, and a four-target magnetic ring connecting rod reserved screw hole with the same hole diameter as the four-target connecting rod reserved screw hole is provided on the outer side wall of the four-target magnetic ring, and a four-target magnetic ring alignment mark is provided on the upper edge of the four-target magnetic ring, which is aligned with the four-target magnetic ring reserved groove alignment mark; An upwardly opening center target prism pre-set hole is provided in the middle of the upper portion of the center target; an upwardly opening center target magnetic ring pre-set groove is provided on the upper portion of the center target, between the center target prism pre-set hole and the outer side wall of the center target; a center target connecting rod pre-set screw hole is provided on the outer side wall of the center target and on the vertical and horizontal cross lines, penetrating the outer side wall of the center target and communicating with the center target magnetic ring pre-set groove; a center target magnetic ring pre-set groove alignment mark is provided on the upper edge of the center target; The center target magnetic ring is a ring body with an inner diameter slightly larger than the inner diameter of the center target magnetic ring reserved groove and an outer diameter slightly larger than the outer diameter of the center target magnetic ring reserved groove, so that the center target magnetic ring is just embedded in the center target magnetic ring reserved groove from top to bottom. Four center target magnetic ring connecting rod reserved screw holes with the same diameter as the center target connecting rod reserved screw holes and positions corresponding to the four center target connecting rod reserved screw holes are evenly provided on the outer side wall of the center target magnetic ring. A center target magnetic ring alignment mark is provided on the upper edge of the center target magnetic ring, which is aligned with the center target magnetic ring reserved groove alignment marks of the four center targets. Insert target matching prisms into four reserved holes for target prisms and one reserved hole for central target prism respectively. After the target matching prisms are inserted into the holes, the hole walls of the four reserved holes for target prisms and the reserved hole for central target prism should be in close contact with the target matching prisms. Embed a four-target magnetic ring in the four-target magnetic ring reserved groove of each four-target, the groove wall of the four-target magnetic ring reserved groove must be tightly attached to the ring wall of the four-target magnetic ring, and the four-target magnetic ring reserved groove alignment mark and the four-target magnetic ring alignment mark must match and coincide, at this time, the four-target connecting rod reserved screw holes and the four-target magnetic ring connecting rod reserved screw holes are on the same axis; embed the central target magnetic ring in the central target magnetic ring reserved groove of the central target, the groove wall of the central target magnetic ring reserved groove must be tightly attached to the ring wall of the central target magnetic ring, and the center target magnetic ring reserved groove alignment mark and the center target magnetic ring alignment mark must match and coincide, at this time, the four cross-shaped central target connecting rod reserved screw holes and the corresponding four central target magnetic ring connecting rod reserved screw holes are all on the same axis; The inner end of the center target end connecting rod is provided with an external thread matching the reserved screw hole of the center target connecting rod, and the outer end of the center target end connecting rod is provided with a center target end connecting rod sleeve opening outward, and the outer ends of the four end target connecting rods are provided with external threads matching the reserved screw holes of the four end target connecting rods. The inner ends of the four end target connecting rods are light rods that can be inserted into and tightly matched with the center target end connecting rod sleeve; the inner ends of the four center target end connecting rods are respectively screwed into the four center target connecting rod reserved screw holes on the outer side wall of the center target from the outside to the inside, and the inner end of each center target end connecting rod passes through the corresponding center target connecting rod reserved screw hole and is screwed into the center target magnetic ring connecting rod reserved screw hole corresponding to the center target magnetic ring for fixation, so that the center target end connecting rod will fix the center The target and the center target magnetic ring are fixed as one; the outward end of each four-end target connecting rod is screwed into the reserved screw hole of the four-target connecting rod on the outer wall of the four-target from the outside to the inside, and the outward end of each four-end target connecting rod passes through the corresponding reserved screw hole of the four-target connecting rod and is screwed into the reserved screw hole of the four-target magnetic ring connecting rod corresponding to the four-target magnetic ring for fixation, so that the four-end target connecting rod fixes the four targets and the four-target magnetic ring as one; the inward ends of the four four-end target connecting rods are respectively inserted into the center target end connecting rod sleeves corresponding to the four center target end connecting rods, so that the four four-targets and one center target are connected together through the four center target end connecting rods and the four four-end target connecting rods, and a center target is located in the center of the four four-target targets in the cross shape.
2. The rapid measurement and positioning device for the steering saddle of a low-tower cable-stayed bridge according to claim 1 is characterized by: The axis connected by the reserved screw holes of the four-to-target connecting rods of the upper four-to-target and the reserved screw holes of the four-to-target connecting rods of the lower four-to-target and the axis connected by the reserved screw holes of the four-to-target connecting rods of the left four-to-target and the reserved screw holes of the four-to-target connecting rods of the right four-to-target must be absolutely vertical.
3. The rapid measurement and positioning device for the steering saddle of a low-tower cable-stayed bridge according to claim 1 is characterized in that: The four target end connecting rods and the center target end connecting rod must be concentric and coaxial when they are manufactured. When the four target end connecting rods are inserted into the center target end connecting rod sleeve of the center target end connecting rod, the outer wall of the four target end connecting rods must be in close contact with the inner wall of the center target end connecting rod sleeve.
4. The rapid measurement and positioning device for a steering saddle of a low-tower cable-stayed bridge according to claim 1 is characterized in that: The connecting rods at the four target ends and the connecting rod at the center target end must be made concentric and coaxial.
5. A method for rapid measurement and positioning of a steering saddle on a low-tower cable-stayed bridge, characterized by: The specific steps are as follows: A. Layout of control points for the main tower construction densification network: With the central axis of the main tower as the baseline, a pair of main tower construction densification network control points are set at appropriate locations upstream and downstream on both sides of the water area to form a geodetic quadrilateral network. These points are measured in conjunction with the precision control points CPI and CPII near the work site to obtain the plane coordinates of the four main tower construction densification network control points. At the same time, the above four main tower construction densification network control points are measured in conjunction with the leveling base points of the line near the work site to obtain the elevation results of the four main tower construction densification network control points. The four main tower construction densification network control points are numbered DQ1, DQ2, DQ3, and DQ4, of which DQ1 and DQ2 are located upstream of the main tower central axis water area, and DQ3 and DQ4 are located downstream of the central axis water area of the middle tower. The points are arranged counterclockwise on the plane. B. Assembling the positioning device: First, insert a target matching prism into each of the four reserved holes for the four target prisms and the reserved hole for the central target prism; Second, embed a four-target magnetic ring in each of the four four-target magnetic ring reserved grooves, and the alignment marks of the four-target magnetic ring reserved grooves and the four-target magnetic ring alignment marks must match and overlap; embed a central target magnetic ring in a central target magnetic ring reserved groove, and the alignment marks of the central target magnetic ring reserved groove and the central target magnetic ring alignment marks must match and overlap; third, screw the central target end connecting rod into the four central target connecting rod reserved screw holes, and at the same time, screw the inward end of the central target end connecting rod into the central target magnetic ring connecting rod reserved screw hole for fixation; screw the four-end target connecting rod into the four-target connecting rod reserved screw holes of the four sets of four-target, and at the same time, screw the four-end target connecting rod into the four-target connecting rod Screw the outward end into the reserved screw hole of the four-target magnetic ring connecting rod for fixation; fourth, insert the inward ends of the four four-target connecting rods into the center target end connecting rod sleeves of the four center target end connecting rods facing outward, and adjust the four-end target connecting rods to adjust the distance from the center of the target matching prism of the center target to the center of the target matching prism of the four-target according to the distance from the center hole of the steering saddle anchor plate wire tube hole group to the upper, lower, left and right edge holes; fifth, match the assembled and adjusted positioning device with the steering saddle anchor plate wire tube hole group, use four four-target magnetic rings and one center target magnetic ring to adsorb the positioning device on the anchor plate, and then the installation and positioning work of the steering saddle can be carried out; C. Two 0.5″ high-precision total stations were used on site to set up stations and orient themselves at control points DQ1 and DQ3 of the main tower construction density network on both sides of the water area, with each station looking back at control points DQ2 and DQ4 of the main tower construction density network on the opposite bank. After the station setting and orientation were completed, the three-dimensional coordinates of the four target supporting prisms and one target supporting prism of the center target of the positioning device adsorbed on the anchor pads at the front and rear ends of the steering saddle were collected by the total stations on both sides, and compared with the design coordinates to calculate the coordinate difference. D. The workers at the work site shall adjust the elevation deviation of the anchor plate of the steering saddle according to the difference in coordinates of the left and right four-point targets; adjust the lateral deviation of the anchor plate of the steering saddle according to the difference in coordinates of the upper and lower four-point targets; and adjust the line direction deviation of the anchor plate of the steering saddle according to the difference in coordinates of the center target; E. After the rough adjustment is completed, roughly limit the steering saddle; repeat steps C and D to fine-tune and lock the spatial posture of the steering saddle; F. Finally, the three-dimensional coordinate measurement data of the positioning device adsorbed on the anchor pads at the front and rear ends of the steering saddle is collected to determine whether the various parameter indicators of the spatial posture of the steering saddle meet the standard tolerance requirements, thereby achieving rapid and accurate positioning of the steering saddle.