Suspension bridge cable conduit measuring device and measuring method

Abstract

The invention provides a device and a method for measuring a cable conduit of a suspension bridge, and belongs to the field of engineering measurement. The problems that during existing cable conduit measurement, the surface of the conduit wall is smooth, a prism is not prone to being fixed, a traditional measurement method is large in error, and the measurement angle is limited when obstacles exist are solved. The device can be fixed to the cable conduit through the arc-shaped positioning piece, coordinates are measured through the two prisms which are located on the same axis and are centrosymmetric to the center of the cable conduit, the average value is taken, the center position of the cable conduit can be rapidly determined, and the position of the vertical axis of the cable conduit can be rapidly calibrated through leveling of the bubble level. Compared with the prior art, the device can be operated by a single person, the measured cable guide pipe position is more detailed and accurate compared with visual inspection, the measurement error is greatly reduced, the measurement precision is improved, the cost is low, the operation is safe and simple, and the detection speed is high; in addition, even if a shielding object appears, the coordinate can be read only through the two prisms so as to realize the center positioning of the cable conduit, and the measurement is not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering measurement, and in particular to a suspension bridge cable conduit measurement device and a measurement method. Background Art

[0002] During the construction of a suspension bridge, the positioning of the anchor prestressed pipeline is one of the most important processes of the suspension bridge. During operation, personnel need to quickly and accurately position the cable guide tube. Since the anchor prestressed pipe of the suspension bridge is a circular steel pipe, when measuring and positioning the cable guide tube, it is necessary to measure the spatial coordinates of its center line, compare it with the design, and correct the position deviation.

[0003] At present, the traditional method for positioning the cable guide tube is to set up a prism on the tube wall surface to measure the surface coordinates, and then calculate the center position of the tube guide according to the inclination angle and radius of the cable guide tube; however, the tube wall surface is smooth at the outer wall position of the measuring tube, which is not conducive to the fixation of the prism, and the position of the tube guide axis is difficult to determine and can only be estimated visually, resulting in large measurement point errors; and the prism pole can only be erected vertically. When there is an obstacle between the prism and the instrument causing a lack of visibility, the instrument position needs to be changed. This method is very limited.

[0004] Therefore, there is an urgent need for a measurement and positioning device that can quickly locate the position of the pipeline and is convenient for use when there are many obstacles and the prism is not restricted by the angle. Summary of the invention

[0005] The technical problems to be solved by the present invention are:

[0006] In order to solve the problem that when measuring the existing cable conduit, the surface of the tube wall is smooth and it is difficult to fix the prism, and the traditional measurement method has large errors and the measurement angle is limited when there are obstacles.

[0007] The present invention adopts the following technical solutions to solve the above technical problems:

[0008] The present invention provides a cable guide tube measuring device for a suspension bridge, comprising an arc-shaped positioning piece for being attached to the outer wall of the cable guide tube, the arc-shaped positioning piece is provided with a first fixing belt and a second fixing belt, and the arc-shaped positioning piece is fixed to the cable guide tube through the first fixing belt and the second fixing belt, and the C2-type connecting arm comprises a C2-type connecting arm vertical rod and a C2-type connecting arm first cross rod and a C2-type connecting arm second cross rod perpendicular to both sides of the C2-type connecting arm vertical rod, and the ends of the C2-type connecting arm first cross rod and the C2-type connecting arm second cross rod are arranged on the arc-shaped positioning piece. At the top midline position of the position slice, the center of the C2 connecting arm vertical rod is connected to the first prism through the first prism rod; the C1 connecting arm includes a C1 connecting arm vertical rod and a C1 connecting arm first cross rod and a C1 connecting arm second cross rod at both ends of the C1 connecting arm vertical rod, the end of the C1 connecting arm first cross rod is connected to the connection between the first prism rod and the C2 connecting arm vertical rod, a bubble level is provided on the C1 connecting arm first cross rod, and the C2 connecting arm second cross rod is connected to the second prism through the second prism rod.

[0009] Furthermore, the first prism and the second prism are located on the same axis and are symmetrical to the center of the cable guide tube.

[0010] Furthermore, a water drop-shaped positioning hole is provided at the midline of the arc-shaped positioning piece, and the positioning hole is located directly below the first prism.

[0011] Furthermore, the inner diameter of the arc-shaped positioning piece is the same as the outer diameter of the cable conduit.

[0012] Furthermore, the connection points between the first cross bar of the C2-type connecting arm and the second cross bar of the C2-type connecting arm and the arc-shaped positioning piece are respectively at the same distance from the ends of both sides of the arc-shaped positioning piece.

[0013] Furthermore, the first prism and the second prism are both Leica prisms.

[0014] Furthermore, the first fixing belt is a first metal fixing belt, the second fixing belt is a second metal fixing belt, and both the first fixing belt and the second fixing belt can be fixed by bolts.

[0015] Furthermore, the first prism rod and the first prism, and the second prism rod and the second prism are all connected via a prism shaft.

[0016] Furthermore, the length of the first prism rod is the same as the length of the second prism rod.

[0017] A measuring method for a suspension bridge cable conduit measuring device comprises the following steps:

[0018] Install the arc-shaped positioning piece on the cable guide tube, observe whether the bubble in the bubble level is in the middle position, and use the first fixing belt and the second fixing belt to fix the arc-shaped positioning piece on the cable guide tube. During the fixing process, it is necessary to constantly observe whether the bubble level is leveled. If the bubble is offset, adjust the first fixing belt and the second fixing belt according to the offset position until the bubble is centered, which is used to determine the pipeline position of the cable guide tube. The vertex of the positioning hole is located on the vertical axis of the cable guide tube;

[0019] The coordinates measured by the first prism and the second prism are averaged to obtain the center position of the cable guide tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention discloses a cable guide measuring device and a measuring method for a suspension bridge. The device can be fixed on the cable guide by using an arc-shaped positioning piece. The coordinates are measured by two prisms located on the same axis and symmetrical to the center of the cable guide and the average value is taken to quickly determine the center position of the cable guide. The position of the vertical axis of the cable guide can be quickly calibrated by leveling the bubble level. Compared with the prior art, the device can be operated by one person. The measured cable guide position is more detailed and accurate than visual observation, which greatly reduces the measurement error and improves the measurement accuracy. The device is low in cost, safe and simple to operate, and has a fast detection speed. In addition, even if an obstruction appears, the coordinates can be read only by two prisms to realize the center positioning of the cable guide without affecting the measurement. The device can also be installed at different positions up and down the cable guide to measure the center position of the cable guide at different heights to achieve the measurement purpose. The material used in the device is common steel, the structure is simple and easy to process, easy to operate, easy to carry, and the device structure is firm and reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a suspension bridge cable conduit measuring device in an embodiment of the present invention;

[0023] Figure 2 It is a cross-sectional view of a suspension bridge cable conduit measuring device in an embodiment of the present invention;

[0024] Figure 3 It is a top view of a suspension bridge cable conduit measuring device in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 10. C1 type connecting arm vertical rod; 11. C1 type connecting arm first horizontal rod; 12. C1 type connecting arm second horizontal rod; 13. C2 type connecting arm vertical rod; 14. C2 type connecting arm first horizontal rod; 15. C2 type connecting arm second horizontal rod; 16. arc-shaped positioning piece; 17. first fixing belt; 18. second fixing belt; 19. bubble level; 20. first prism rod; 21. second prism rod; 22. first prism; 23. second prism; 24. positioning hole; 25. cable guide tube; 26. prism shaft. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "up", "down", "front", "back", "left", "right", etc., which indicate directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the referred elements and devices must be operated according to the specific directions and defined operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0028] In the description of the present invention, it should be noted that the terms "first", "second", and "third" mentioned in the embodiments of the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] Specific implementation plan 1: Combine Figures 1 to 3As shown, the present invention provides a suspension bridge cable guide tube 25 measuring device, comprising an arc-shaped positioning piece 16 for being attached to the outer wall of the cable guide tube 25, the arc-shaped positioning piece 16 is provided with a first fixing belt 17 and a second fixing belt 18, and the arc-shaped positioning piece 16 is fixed to the cable guide tube 25 through the first fixing belt 17 and the second fixing belt 18, the C2 type connecting arm comprises a C2 type connecting arm vertical rod 13 and a C2 type connecting arm first cross bar 14 and a C2 type connecting arm second cross bar 15 perpendicular to both sides of the C2 type connecting arm vertical rod 13, the ends of the C2 type connecting arm first cross bar 14 and the C2 type connecting arm second cross bar 15 are arranged at the top midline position of the arc-shaped positioning piece 16, the C The center of the C2 type connecting arm vertical rod 13 is connected to the first prism 22 through the first prism rod 20, and the C1 type connecting arm includes a C1 type connecting arm vertical rod 10 and a C1 type connecting arm first cross rod 11 and a C1 type connecting arm second cross rod 12 at both ends of the C1 type connecting arm vertical rod 10, and the end of the C1 type connecting arm first cross rod 11 is connected to the connection between the first prism rod 20 and the C2 type connecting arm vertical rod 13, and a bubble level 19 is provided on the C1 type connecting arm first cross rod 11, and the C2 type connecting arm second cross rod 15 is connected to the second prism 23 through the second prism rod 21. At this time, the first prism 22 and the second prism 23 are located on the same axis and symmetrical to the center of the cable guide tube 25.

[0031] Preferably, the connection points between the C2-type connecting arm first cross bar 14 and the C2-type connecting arm second cross bar 15 and the arc-shaped positioning piece 16 are at the same distance from the ends of both sides of the arc-shaped positioning piece 16 .

[0032] The first prism 22 and the second prism 23 are both Leica prisms. Leica prisms are made of high-quality glass and equipped with optical coatings, which can achieve high measurement accuracy even in extremely harsh environments. Unlike traditional prism structures, the bottom surface of the Leica prism has a reflective copper coating composed of an adhesive layer, a copper coating, a protective layer and a shaping layer. The copper coating and the shaping layer extend the service life of the prism, and the additional coating on the prism surface increases scratch protection.

[0033] The first fixing belt 17 is a first metal fixing belt, the second fixing belt 18 is a second metal fixing belt, and both the first fixing belt 17 and the second fixing belt 18 can be fixed by bolts; the C1 type connecting arm and the C2 type connecting arm are both made of metal, so that the device can be disassembled and reused.

[0034] A water drop-shaped positioning hole 24 is provided at the midline of the arc-shaped positioning piece 16, and the positioning hole 24 is located directly below the first prism 22. The main function of the water drop-shaped positioning hole 24 is to limit the degree of freedom of the workpiece during the positioning process, and has a unique vertex. Other shapes do not have a unique vertex.

[0035] The first prism rod 20 and the first prism 22, and the second prism rod 21 and the second prism 23 are all connected via a prism shaft 26, so as to ensure that the prisms are stable in all directions and will not slip off.

[0036] The length of the first prism rod 20 is the same as the length of the second prism rod 21 .

[0037] Specific implementation plan 2: Combination Figures 1 to 3 As shown, the present invention provides a measurement method for a suspension bridge cable conduit measurement device, comprising the following steps:

[0038] Install the arc-shaped positioning piece 16 on the cable guide tube 25, observe whether the bubble in the bubble level 19 is in the middle position, and use the first fixing belt 17 and the second fixing belt 18 to fix the arc-shaped positioning piece 16 on the cable guide tube 25. During the fixing process, it is necessary to constantly observe whether the bubble level 19 is leveled. If the bubble is offset, adjust the first fixing belt 17 and the second fixing belt 18 according to the offset position until the bubble is centered, which is used to determine the pipeline position of the cable guide tube 25. Figure 3 As shown, the vertex of the positioning hole 24 is located on the vertical axis of the cable guide tube 25;

[0039] The coordinates measured by the first prism 22 and the second prism 23 are averaged to obtain the center position of the cable guide 25 .

[0040] The other combinations and connection relationships of this embodiment are the same as those of the first embodiment.

[0041] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A suspension bridge cable conduit measuring device, characterized in that: The invention comprises an arc-shaped positioning piece (16) for being attached to the outer wall of the cable guide tube (25), wherein the arc-shaped positioning piece (16) is provided with a first fixing belt (17) and a second fixing belt (18), and is used to fix the arc-shaped positioning piece (16) to the cable guide tube (25) through the first fixing belt (17) and the second fixing belt (18), and the C2-type connecting arm comprises a C2-type connecting arm vertical rod (13) and a C2-type connecting arm first cross rod (14) and a C2-type connecting arm second cross rod (15) perpendicular to both sides of the C2-type connecting arm vertical rod (13), and the ends of the C2-type connecting arm first cross rod (14) and the C2-type connecting arm second cross rod (15) are arranged at the top center line of the arc-shaped positioning piece (16). The center of the C2-type connecting arm vertical rod (13) is connected to the first prism (22) through the first prism rod (20); the C1-type connecting arm comprises a C1-type connecting arm vertical rod (10) and a C1-type connecting arm first cross rod (11) and a C1-type connecting arm second cross rod (12) at both ends of the C1-type connecting arm vertical rod (10); the end of the C1-type connecting arm first cross rod (11) is connected to the connection between the first prism rod (20) and the C2-type connecting arm vertical rod (13); a bubble level (19) is provided on the C1-type connecting arm first cross rod (11); and the C2-type connecting arm second cross rod (15) is connected to the second prism (23) through the second prism rod (21).

2. A suspension bridge cable conduit measuring device according to claim 1, characterized in that: The first prism (22) and the second prism (23) are located on the same axis and are symmetrical to the center of the cable guide tube (25).

3. A suspension bridge cable conduit measuring device according to claim 2, characterized in that: A water drop-shaped positioning hole (24) is provided at the midline of the arc-shaped positioning piece (16), and the positioning hole (24) is located directly below the first prism (22).

4. A suspension bridge cable conduit measuring device according to claim 3, characterized in that: The inner diameter of the arc-shaped positioning piece (16) is the same as the outer diameter of the cable guide tube (25).

5. A suspension bridge cable conduit measuring device according to claim 4, characterized in that: The connection points between the first cross bar (14) of the C2-type connecting arm and the second cross bar (15) of the C2-type connecting arm and the arc-shaped positioning piece (16) are respectively at the same distance from the ends of both sides of the arc-shaped positioning piece (16).

6. A suspension bridge cable conduit measuring device according to claim 5, characterized in that: The first prism (22) and the second prism (23) are both Leica prisms.

7. A suspension bridge cable conduit measuring device according to claim 6, characterized in that: The first fixing belt (17) is a first metal fixing belt, and the second fixing belt (18) is a second metal fixing belt. Both the first fixing belt (17) and the second fixing belt (18) can be fixed by bolts.

8. A suspension bridge cable conduit measuring device according to claim 6, characterized in that: The first prism rod (20) and the first prism (22), and the second prism rod (21) and the second prism (23) are all connected via a prism rotating shaft (26).

9. A suspension bridge cable conduit measuring device according to claim 7, characterized in that: The length of the first prism rod (20) is the same as the length of the second prism rod (21).

10. A method for measuring a suspension bridge cable conduit measuring device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The arc-shaped positioning piece (16) is mounted on the cable guide tube (25), and the bubble in the bubble level (19) is observed to be located in the middle position. The arc-shaped positioning piece is fixed on the cable guide tube (25) by using the first fixing belt (17) and the second fixing belt (18). During the fixing process, it is necessary to constantly observe whether the bubble level (19) is leveled. If the bubble is offset, the first fixing belt (17) and the second fixing belt (18) are adjusted according to the offset position until the bubble is centered, so as to determine the pipeline position of the cable guide tube (25). The vertex of the positioning hole (24) is located on the vertical axis of the cable guide tube (25); The coordinates measured by the first prism (22) and the second prism (23) are averaged to obtain the center position of the cable guide tube (25).

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