Method for installing a cable anchorage sleeve for a suspension bridge

Abstract

This invention provides a method for installing anchor cable sleeves in suspension bridges, comprising the following steps: preparing auxiliary equipment, preliminary preparation work, arranging positioning frames, determining the axis of the first cable sleeve section, adjusting the angle between the first cable sleeve section and the design surface, fixing the first cable sleeve section, determining the axis of the (N+1)th cable sleeve section, adjusting the angle between the (N+1)th cable sleeve section and the design surface, fixing the (N+1)th cable sleeve section, and installing the final anchor plate. This invention enables the rapid and accurate determination of the precise installation position of the cable sleeve during construction.

Description

[Technical Field]

[0001] This invention relates to the field of bridge construction technology, specifically to a method for installing anchor cable sleeves in suspension bridges. [Background Technology]

[0002] Modern suspension bridges use high-strength steel wire as the main tension structure, featuring reasonable stress distribution, large span capacity, maximum material strength utilization, and economical cost. They are the ideal bridge type for crossing obstacles over 1,000 meters high and are increasingly used in bridges spanning rivers and seas. Long-span suspension bridges consist of multiple cables, which, after tensioning, are distributed in a fan shape, with varying angles to the bridge deck. Gravity anchorages are generally used during cable construction, with prestressed anchoring systems frequently employed. During installation, the axis of the cable sleeve in the anchorage must be aligned with the cable strand axis to ensure the cable's tensile stability. Therefore, the installation accuracy of the cable sleeve assembly in the anchorage is crucial to the cable's stress and safety after the bridge is completed. The cable sleeve assembly includes a front anchor plate, several cable sleeves, and an end anchor plate. During the installation of several cable sleeves, the axis of several cable sleeves needs to be repeatedly adjusted to meet the installation requirements. Therefore, how to construct the cable sleeves quickly and with high precision to ensure that the design requirements are met is an important task in the field of suspension bridge construction.

[0003] Current cable-stayed pipe construction methods typically employ multiple rows of inclined column trusses to assist in the installation of the cable-stayed pipes. These inclined column trusses, perpendicular to the pipes, support their weight and fix their position. However, the following technical problems exist during cable-stayed pipe construction: how to accurately position the first, extended, and final sections of the cable-stayed pipe to ensure accurate installation. Current techniques lack a simple and efficient method; generally, it involves continuous measurement and adjustment to gradually approach the design position until the deviation is within acceptable limits. This process is time-consuming and makes it difficult to guarantee high precision. Therefore, determining the accurate installation position of the cable-stayed pipes quickly and accurately during construction is the primary problem to be solved. [Summary of the Invention]

[0004] The present invention aims to solve at least one of the technical problems mentioned above, and provides a method for installing the cable sleeve of the suspension bridge anchorage, which can quickly and accurately determine the precise installation position of the cable sleeve during construction.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for installing anchor cable sleeves in a suspension bridge includes the following steps:

[0007] Preparation of auxiliary equipment: A positioning device is provided, the positioning device including a positioning frame, the positioning frame including a base rod, a U-shaped frame, an arc strip and two transverse bolts, the U-shaped frame having an adjustment groove, the bottom of the U-shaped frame corresponding to the adjustment groove being connected to the base rod and the U-shaped frame being rotatable relative to the base rod, the arc strip being located in the adjustment groove and both ends of the arc strip extending away from the base rod, one end of the two transverse bolts being respectively connected to the opposite ends of the arc strip, and the two transverse bolts being respectively threaded into the opposite ends of the U-shaped frame;

[0008] Preliminary preparations: The cable sleeve assembly includes a front anchor plate, a first section of cable sleeve, an (N+1)th section of cable sleeve, and a final anchor plate, where N ≥ 1. The first section of cable sleeve has the same structure as the (N+1)th section of cable sleeve, and the arc-shaped strip is adapted to the outer diameter of the first section of cable sleeve. Construction scaffolding is erected, including a design surface perpendicular to the cable strand axis. The front anchor plate is then installed.

[0009] Arrange the positioning frame: fix the bottom rod to the construction scaffold and make the arc-shaped strip opposite to the front anchor plate;

[0010] Determining the axis of the first section of the cable sleeve: A measuring rope is provided, and one end of the measuring rope is fixed at the center of the front anchor plate. The measuring rope is straightened so that the end of the measuring rope away from the front anchor plate corresponds to and is fixed with the center of the arc-shaped strip. By controlling the two transverse bolts, the arc-shaped strip is moved along the length of the bottom rod. When the center of the arc-shaped strip moves to the cable strand axis, the movement of the arc-shaped strip is stopped. Then the measuring rope is the axis of the first section of the cable sleeve.

[0011] Adjust the angle between the first section of the cable sleeve and the design surface: detach the measuring rope, align one end of the first section of the cable sleeve with the front anchor plate, support the body of the first section of the cable sleeve on the arc-shaped strip, drive the U-shaped frame to rotate relative to the bottom rod, so that the axis of the first section of the cable sleeve is perpendicular to the design surface;

[0012] Fixing the first section of the cable sleeve: Fix the front anchor plate to the first section of the cable sleeve, fix the first section of the cable sleeve to the bottom rod through the fixing strip, remove the arc strip, the transverse bolt and the U-shaped frame from the positioning frame and reuse them, thus completing the installation and fixing of the first section of the cable sleeve;

[0013] Determining the axis of the N+1th section of the cable sleeve: Fix the bottom rod of another positioning frame to the construction scaffold and make the corresponding arc strip opposite to the end of the first section of the cable sleeve away from the front anchor plate. Align one end of the measuring rope with the center point of the first section of the cable sleeve and fix it. Straighten the measuring rope and make the end of the measuring rope away from the first section of the cable sleeve correspond to the center of the arc strip and fix it. By controlling the two transverse bolts, move the arc strip as a whole along the length direction of the bottom rod. Stop moving the arc strip when the center of the arc strip moves to the cable strand axis, thus determining the axis of the N+1th section of the cable sleeve.

[0014] Adjust the angle between the N+1th section of the cable sleeve and the design surface: detach the measuring rope, align one end of the N+1th section of the cable sleeve with the end of the first section of the cable sleeve that is away from the front anchor plate, support the body of the N+1th section of the cable sleeve on the arc-shaped strip of another positioning frame, drive the U-shaped frame to rotate relative to the corresponding bottom rod, so that the axis of the N+1th section of the cable sleeve is perpendicular to the design surface;

[0015] Fixing the N+1th section of the cable sleeve: Fix the N+1th section of the cable sleeve to the first section of the cable sleeve, fix the N+1th section of the cable sleeve to the bottom rod through the fixing strip, remove the arc strip, the transverse bolt, and the U-shaped frame from the positioning frame and reuse them, thus completing the installation and fixing of the N+1th section of the cable sleeve;

[0016] Installation of the last anchor plate: When the N+1th section of the cable sleeve is the last section of the cable sleeve, the last anchor plate is installed on the end of the N+1th section of the cable sleeve that is away from the first section of the cable sleeve, thus completing the installation of the cable sleeve assembly.

[0017] Furthermore, the positioning device also includes a positioning disc, which includes a disc and a limiting strip. The outer diameter of the disc is the same as the inner diameter of the first section of the cable sleeve. A central hole is provided through the center of the disc. The limiting strip is fixedly disposed on one side of the disc and the opposite ends of the limiting strip extend to the outside of the disc.

[0018] Before the step of "fixing the first section of the cable sleeve", the center point of the first section of the cable sleeve needs to be checked: the disc is inserted into the port of the first section of the cable sleeve away from the front anchor plate, and the center of the first section of the cable sleeve away from the front anchor plate is checked.

[0019] Before the step of "fixing the N+1th section of the cable sleeve", the "center point verification of the N+1th section of the cable sleeve" needs to be performed: the disc is inserted into the port of the N+1th section of the cable sleeve that is away from the first section of the cable sleeve, and the center of the end of the N+1th section of the cable sleeve that is away from the first section of the cable sleeve is verified.

[0020] In step "Determining the axis of the N+1th section of the cable sleeve", after "verifying the center point of the first section of the cable sleeve", the center hole of the disc coincides with the center point of the first section of the cable sleeve. At this time, one end of the measuring rope can be aligned with the center hole of the disc.

[0021] Furthermore, the method for step "verification of the center point of the first section of the cable sleeve" is the same as that for step "verification of the center point of the (N+1)th section of the cable sleeve":

[0022] A reflective prism is inserted into the central hole, and a total station is placed at the end of the cable strand axis away from the front anchor plate. The total station is used to detect whether the reflective prism is on the straight line of the cable strand axis.

[0023] Furthermore, the positioning frame also includes a vertical bolt, which passes through the bottom of the arc-shaped strip, the bottom of the U-shaped frame, and the base rod in sequence. The vertical bolt can rotate, move, or be fixed relative to the base rod, so that the U-shaped frame can rotate relative to the base rod about the vertical bolt as an axis.

[0024] In the step "Determining the axis of the first section of the cable sleeve", the vertical bolt, together with the two horizontal bolts, adjusts the axis of the first section of the cable sleeve;

[0025] In step “Determining the axis of the N+1th section of the cable sleeve”, the vertical bolt of another positioning frame, together with two corresponding horizontal bolts, adjusts the axis of the N+1th section of the cable sleeve.

[0026] In the step "Checking the center point of the first section of the cable sleeve", the vertical bolt, together with the two horizontal bolts, adjusts the center point of the first section of the cable sleeve;

[0027] In the step “Review of the center point of the N+1th section of the cable sleeve”, the vertical bolt of another positioning frame, together with two corresponding horizontal bolts, adjusts the center point of the N+1th section of the cable sleeve.

[0028] Furthermore, the bottom rod has a moving groove corresponding to the arc-shaped strip, and the moving groove extends along the length of the bottom rod; the U-shaped frame has a transverse moving groove corresponding to the moving groove, and the vertical bolt passes through the moving groove and the transverse moving groove; one end of the vertical bolt is also screwed with a top nut, two middle nuts and a bottom nut, the top nut is located on the side of the U-shaped frame away from the bottom rod, the two middle nuts are located between the U-shaped frame and the bottom rod, the bottom nut is located on the side of the bottom rod away from the crossbar of the U-shaped frame, and the other end of the vertical bolt passes through the arc-shaped strip and is screwed to the arc-shaped strip.

[0029] Furthermore, the U-shaped frame includes a horizontal bar and two vertical bars. The horizontal bar extends along the length of the bottom bar and is rotatably connected to the bottom bar. The two vertical bars are arranged parallel to each other, and one end of each vertical bar is connected to the opposite ends of the horizontal bar. The arc-shaped strip is located between the two vertical bars. One end of a horizontal bolt is rotatably inserted through the end of a vertical bar away from the horizontal bar, and the other end of the horizontal bolt is connected to the end of the arc-shaped strip corresponding to it. The horizontal bar has a transverse groove corresponding to the moving groove, and the vertical bolt passes through the transverse groove and the moving groove.

[0030] Furthermore, there are two limiting strips, which are spaced apart along the diameter of the disk.

[0031] By adopting the above technical solution, the present invention has the following beneficial effects:

[0032] 1. The installation method of this application only requires confirming that the center of the arc strip coincides with the measuring rope to determine the installation position of the axis of the first section of the cable sleeve and the N+1th section of the cable sleeve. Compared with the repeated adjustment operation in the prior art, it is not only simpler but also has a much higher accuracy.

[0033] 2. By rotating the two vertical rods to fine-tune the axes of the first section of the cable sleeve and the N+1th section of the cable sleeve, and after further confirming that the corresponding axes are perpendicular to the design plane, the first section of the cable sleeve and the N+1th section of the cable sleeve are fixed. This can further improve the coincidence of the axes of the first section of the cable sleeve and the N+1th section of the cable sleeve with the cable strand axis.

[0034] It is evident that the method of adjusting the axis of the first section of the cable sleeve and the N+1th section of the cable sleeve can quickly and accurately determine the precise installation position of the cable sleeve during construction. [Attached Image Description]

[0035] Figure 1 This is a schematic diagram of the positioning frame in this invention.

[0036] Figure 2 This is a schematic diagram of the positioning disk in this invention.

[0037] Figure 3 This is a schematic diagram showing the installation steps of the first section of the cable sleeve.

[0038] Figure 4 This is a schematic diagram showing the installation steps for the N+1th section of the cable sleeve.

[0039] Figure 5 This is a schematic diagram of the measuring rope in a straightened state.

[0040] Figure 6 This is a schematic diagram of the first section of the cable sleeve being fixed on the positioning frame.

[0041] In the attached diagram, 100-first section of cable sleeve, 101-N+1th section of cable sleeve, 103-front anchor plate, 104-end anchor plate, 1-positioning frame, 11-bottom rod, 110-moving groove, 12-U-shaped frame, 120-adjusting groove, 121-horizontal bar, 122-vertical bar, 123-horizontal moving groove, 13-arc strip, 131-arc strip diameter bar, 132-side, 133-inner arc surface, 134-outer arc surface, 135-end face, 14-horizontal bolt, 141-horizontal nut, 15-vertical bolt, 151-top nut, 152-middle nut, 153-bottom nut, 16-fixing strip, 2-positioning disc, 21-disc, 210-center hole, 22-limiting strip, 3-reflective prism, 4-measuring rope.

Detailed Implementation Methods

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or it may be centered within another component. When a component is described as "set to" another component, it can be directly set on the other component or it may be centered within another component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] like Figures 1 to 3 As shown, a preferred embodiment of the present invention provides a positioning device, which includes a positioning frame 1 and a positioning disk 2.

[0046] The positioning frame 1 includes a base rod 11, a U-shaped frame 12, an arc-shaped strip 13, and two horizontal bolts 14. The U-shaped frame 12 has an adjustment groove 120. The bottom of the U-shaped frame 12 is connected to the base rod 11 corresponding to the adjustment groove 120, and the U-shaped frame 12 can rotate relative to the base rod 11. Specifically, the U-shaped frame 12 includes a horizontal rod 121 and two vertical rods 122. The horizontal rod 121 extends along the length of the base rod 11 and is rotatably connected to it. The two vertical rods 122 are arranged parallel to each other, with one end of each vertical rod 122 connected to the opposite ends of the horizontal rod 121 to form the adjustment groove 120. The arc-shaped strip 13 is located in the adjustment groove 120, and both ends of the arc-shaped strip 13 extend towards the side away from the base rod 11. Two horizontal bolts 14 are connected at one end to opposite ends of the arc-shaped strip 13, and are threaded into opposite ends of the U-shaped frame 12. Specifically, the arc-shaped strip 13 is located between two vertical rods 122. One horizontal bolt 14 is threaded into a threaded hole on the end of one vertical rod 122 opposite to the horizontal rod 121, and the other horizontal bolt 14 is threaded into a threaded hole on the other vertical rod 122 opposite to the horizontal rod 121. The ends of the two horizontal bolts 14 pass through the threaded holes and are connected to the two ends of the arc-shaped strip 13. Each horizontal bolt 14 has a horizontal nut 141 threaded onto opposite sides of the corresponding vertical rod 122. When both horizontal nuts 141 are abutting against opposite sides of the corresponding vertical rod 122, the horizontal bolt 14 is fixed relative to the vertical rod 122; when the horizontal nuts 141 are not in contact with the vertical rod 122, the horizontal nuts 141 can rotate in the corresponding threaded hole, thereby moving relative to the corresponding vertical rod 122.

[0047] In this embodiment, the arc-shaped strip 13 includes two arc-shaped side surfaces 132, an inner arc surface 133, an outer arc surface 134, and two end surfaces 135. The two arc-shaped side surfaces 132 are parallel and opposite to each other. The two opposite arc edges of the inner arc surface 133 are connected to one side of the two arc-shaped side surfaces 132, and the two opposite arc edges of the outer arc surface 134 are connected to the other side of the two arc-shaped side surfaces 132. The two end surfaces 135 are arranged opposite to each other, and each end surface 135 is connected to one end of the two arc-shaped side surfaces 132, the inner arc surface 133, and the outer arc surface 134.

[0048] In this embodiment, the positioning frame 1 further includes a vertical bolt 15, which sequentially passes through the bottom of the arc-shaped strip 13, the bottom of the U-shaped frame 12, and the base rod 11. The vertical bolt 15 can rotate, move, or be fixed relative to the base rod 11, so that the U-shaped frame 12 can rotate relative to the base rod 11 about the vertical bolt 15 as an axis. Specifically, the vertical bolt 15 sequentially passes through the inner arc surface 133 and the outer arc surface 134. The base rod 11 has a moving groove 110 corresponding to the bottom of the arc-shaped strip 13, which extends along the length of the base rod 11. The horizontal bar 121 has a horizontal moving groove 123 corresponding to the moving groove 110. The vertical bolt 15 passes through... The horizontal sliding groove 123 and the moving groove 110 have the same outer diameter as the moving groove 110 and the horizontal sliding groove 123. One end of the vertical bolt 15 is also screwed with a top nut 151, two middle nuts 152, and a bottom nut 153. The outer diameters of the top nut 151, middle nuts 152, and bottom nut 153 are all larger than the width of the moving groove 110 and the horizontal sliding groove 123. The top nut 151 is located on the side of the horizontal bar 121 away from the bottom bar 11. The two middle nuts 152 are located between the horizontal bar 121 and the bottom bar 11. The bottom nut 153 is located on the side of the bottom bar 11 away from the horizontal bar 121 of the U-shaped frame 12. The other end of the vertical bolt 15 passes through the bottom of the arc-shaped strip 13 and is screwed to the arc-shaped strip 13. When the top nut 151 does not abut against the crossbar 121, the two middle nuts 152 do not abut against the crossbar 121 or the bottom bar 11, and the bottom nut 153 does not abut against the bottom bar 11, the vertical bolt 15 can rotate and move relative to the bottom bar 11; when the top nut 151 abuts against the crossbar 121, the two middle nuts 152 abut against the crossbar 121 and the bottom bar 11 respectively, and the bottom nut 153 abuts against the bottom bar 11, the vertical bolt 15 is fixed relative to the bottom bar 11.

[0049] In this embodiment, the positioning device further includes a positioning disc 2, which includes a disc 21 and a limiting strip 22. A central hole 210 is provided through the center of the disc 21. The limiting strip 22 is fixedly disposed on one side of the disc 21 and the opposite ends of the limiting strip 22 extend outside the disc 21. Specifically, there are two limiting strips 22, which are symmetrically disposed on both sides of the disc 21.

[0050] This embodiment also provides a method for installing the anchor cable sleeve of a suspension bridge, see [link to relevant documentation]. Figures 1 to 6 This system is applicable to the installation of anchor cable sleeves in suspension bridges. The components of the cable sleeve assembly are named as follows: The cable sleeve assembly includes a front anchor plate 103, a first cable sleeve section 100, an (N+1)th cable sleeve section 101, and a final anchor plate 104, where N ≥ 1. The first cable sleeve section 100 and the (N+1)th cable sleeve section 101 have the same structure, both being cylindrical. The installation method specifically includes the following steps:

[0051] Prepare auxiliary equipment: Provide a positioning device.

[0052] Preliminary preparations: Erect construction scaffolding (not shown in the diagram). The erection of construction scaffolding is well-known to those skilled in the art and will not be elaborated upon here. The construction scaffolding includes design surfaces perpendicular to the cable strand axis. Specifically, the design surfaces include a first design surface and an (N+1)th design surface. The first design surface and the (N+1)th design surface are parallel to each other, and the (N+1)th design surface is located on the side of the first design surface facing away from the ground. The arc-shaped strip 13 is adapted to the outer diameter of the first section of the cable sleeve 100. Specifically, the inner arc surface 133 of the arc-shaped strip 13 is adapted to the outer diameter of the first section of the cable sleeve 100. Install the front anchor plate 103. Specifically, after ensuring that the front anchor plate 103 is parallel to the first design surface using a total station, install the front anchor plate 103 onto the construction scaffolding.

[0053] Positioning frame 1: Fix the bottom rod 11 to the construction scaffold and make the side 132 of the arc strip 13 opposite to the front anchor plate 103. Specifically, the bottom rod 11 is fixed to the first design surface of the construction scaffold. At this time, the side 132 of the arc strip 13 is located in a position that is roughly parallel to the first design surface. Since the inner arc surface 133 of the arc strip 13 is adapted to the outer diameter of the first section of the cable sleeve 100 and the arc strip 13 has a certain width, the axis of the first section of the cable sleeve 100 can be roughly determined after the first section of the cable sleeve 100 is matched with the arc strip 13, thereby reducing the time for subsequent adjustment of the axis of the first section of the cable sleeve 100.

[0054] The first section determines the axis of the cable sleeve 100: A measuring rope 4 is provided, and one end of the measuring rope 4 is fixed to the center position of the front anchor plate 103. Specifically, in the prior art, the front anchor plate 103 is set on a wooden anchor box, and the shape of the anchor box is consistent with the shape of the front anchor plate 103. A steel nail is nailed to the center point of the anchor box, and then one end of the measuring rope 4 is fixed to the steel nail. Then, the measuring rope 4 is straightened and the end of the measuring rope 4 away from the front anchor plate 103 is aligned with the center of the arc strip 13 and fixed to determine the center coordinates of the arc strip 13. Specifically, an arc strip diameter strip 131 is stretched on the side of the arc strip 13 away from the front anchor plate 103, and the length of the arc strip diameter strip 131 is equal to the diameter of the arc strip 13. Since the arc-shaped strip 13 is prefabricated based on the outer diameter of the cable sleeve 100, its diameter is known, meaning the length of the arc-shaped strip diameter strip 131 is known. Find the midpoint on the arc-shaped strip diameter strip 131; this midpoint is the center of the arc-shaped strip 13. Fix the end of the measuring rope 4 away from the front anchor plate 103 to the center. Fix a prism at the center. Use the prism in conjunction with a total station to determine the coordinates of the end of the measuring rope 4 away from the front anchor plate 103, thus determining the coordinates of the center of the arc-shaped strip 13. By controlling the two transverse bolts 14, the arc-shaped strip 13 is moved along the length of the base rod 11. Specifically, tighten the two transverse nuts 141 until they do not contact the vertical rod 122, moving towards the first direction. While turning one of the transverse bolts 14, turn the other transverse bolt 14 in the first direction, causing the arc-shaped strip 13 to move along the length of the base rod 11. During this process, the vertical bolt 15 moves along the moving groove 110 and the transverse moving groove 123. Because the outer diameter of the vertical bolt 15 matches the width of the moving groove 110 and the transverse moving groove 123, the vertical bolt 15 can only move along the length of the moving groove 110 and the transverse moving groove 123, thus guiding the movement of the vertical bolt 15. When the arc-shaped strip 13 needs to move away from the base rod 11, loosen the top nut 151 until it no longer abuts against the transverse rod 121. Loosen the bottom nut 153 until it no longer abuts against the bottom rod 11. Loosen the two middle nuts 152 until they no longer abut against the crossbar 121 and the bottom rod 11, and the bottom nut 153 no longer abuts against the bottom rod 11. Lift the U-shaped frame 12 away from the crossbar 121. The arc-shaped bar 13 then needs to move away from the bottom rod 11. When the arc-shaped bar 13 moves to the preset position, tighten the top nut 151, the middle nut 152, and the bottom nut 153. Stop moving the arc-shaped bar 13 when the center of the arc-shaped bar 13 moves onto the cable strand axis. Tighten the two horizontal nuts 141 until they abut against the corresponding vertical rod 122. At this time, the measuring rope 4 coincides with the cable strand axis, and the measuring rope 4 is the axis of the first section of the cable sleeve 100.In this step, the coordinates of the center of the arc strip 13 are first determined. The determination of these coordinates provides numerical data for reference and comparison when adjusting the position of the arc strip 13, and also ensures that the center of the arc strip 13 is located at a position close to the cable axis, which not only facilitates adjustment but also increases the convenience of adjustment.

[0055] Adjust the angle between the first section of the cable sleeve 100 and the first design surface: Disconnect the measuring rope 4, align one end of the first section of the cable sleeve 100 with the front anchor plate 103. Specifically, insert one end of the first section of the cable sleeve 100 into the anchor box. The specific insertion method is well known to those skilled in the art and will not be described in detail here. Support the body of the first section of the cable sleeve 100 on the arc-shaped strip 13. Drive the U-shaped frame 12 to rotate relative to the bottom rod 11. Specifically, rotate the two vertical rods 122, causing the horizontal rod 121 to rotate perpendicularly relative to the first design surface with the vertical bolt 15 as the axis. Stop rotating the U-shaped frame 12 when the axis of the first section of the cable sleeve 100 is perpendicular to the first design surface using a total station.

[0056] First section of cable sleeve 100 center point verification: The outer diameter of the disc 21 is consistent with the inner diameter of the first section of cable sleeve 100. The disc 21 is fitted into the port of the first section of cable sleeve 100 away from the front anchor plate 103. At this time, the axis of the first section of cable sleeve 100 passes through the center hole 210 of the disc 21. The limiting strip 22 can limit the disc 21 to the port of the first section of cable sleeve 100 to prevent the disc 21 from slipping into the first section of cable sleeve 100. The center of the first section of cable sleeve 100 away from the front anchor plate 103 is verified.

[0057] Fixing the first section of the cable sleeve 100: Fix the front anchor plate 103 to the first section of the cable sleeve 100. The fixing method is well known to those skilled in the art and will not be described in detail here. Fix the first section of the cable sleeve 100 to the bottom rod 11 using fixing strips 16. Specifically, there are two fixing strips 16, both made of channel steel. The two fixing strips 16 are arranged in a V-shape on the side of the arc strip 13 away from the front anchor plate 103. One end of the fixing strip 16 is welded to the first section of the cable sleeve 100, and the other end is welded to the bottom rod 11. Remove the arc strip 13, the transverse bolt 14 and the nuts on the transverse bolt 14, the vertical bolt 15 and the nuts on the vertical bolt 15, and the U-shaped frame 12 from the positioning frame 1 and reuse them. This completes the installation and fixing of the first section of the cable sleeve 100. After the arc-shaped strip 13, horizontal bolt 14, vertical bolt 15, and U-shaped frame 12 are removed, the first section of the cable sleeve 100 is supported on the construction scaffold by a triangular body composed of two fixing strips 16 and a bottom rod 11, which can ensure the stability of the first section of the cable sleeve 100 on the construction scaffold.

[0058] Determining the axis of the N+1th section of the cable sleeve 101: Fix the bottom rod 11 of the other positioning frame 1 to the construction scaffold and make the corresponding arc strip 13 opposite to the end of the first section of the cable sleeve 100 away from the front anchor plate 103. Specifically, the bottom rod 11 of the other positioning frame 1 is on the N+1th design surface of the construction scaffold; align one end of the measuring rope 4 with the center point of the first section of the cable sleeve 100. Specifically, nail one end of the measuring rope 4 to the center hole 210 of the disc 21 with a steel nail. Straighten the measuring rope 4 and fix the end of the measuring rope 4 away from the first section of the cable sleeve 100 to correspond to and fix the center of the arc-shaped strip 13 to determine the coordinates of the center of the arc-shaped strip 13. By controlling the two horizontal bolts 14, the arc-shaped strip 13 is moved along the length direction of the bottom rod 11. By controlling the corresponding vertical bolts 15, the arc-shaped strip 13 is moved up and down relative to the bottom rod 11. When the center of the arc-shaped strip 13 moves to the cable strand axis, the movement of the arc-shaped strip 13 is stopped. At this time, the measuring rope 4 coincides with the cable strand axis, and the measuring rope 4 is the axis of the (N+1)th section of the cable sleeve 101. For the specific method of determining and moving the center of the arc-shaped strip 13, please refer to "Determination of the Axis of the First Section of the Cable Sleeve 100", which will not be repeated here.

[0059] Adjust the angle between the (N+1)th section of the cable sleeve 101 and the (N+1)th design surface: Disassemble the measuring rope 4, the arc-shaped diameter bar 131, and the positioning disc 2. Align one end of the (N+1)th section of the cable sleeve 101 with the end of the first section of the cable sleeve 100 away from the front anchor plate 103. Specifically, connect one end of the (N+1)th section of the cable sleeve 101 with the end of the first section of the cable sleeve 101 away from the front anchor plate 103, but do not fix it. The connection method is well known to those skilled in the art and will not be described in detail here. Support the body of the (N+1)th section of the cable sleeve 101 on the arc-shaped bar 13 of another positioning frame 1. Drive the U-shaped frame 12 to rotate relative to the corresponding bottom rod 11, so that the axis of the (N+1)th section of the cable sleeve 101 is perpendicular to the (N+1)th design surface.

[0060] Center point verification of section N+1 cable sleeve 100: Insert disc 21 into the port of section N+1 cable sleeve 101 opposite to the end of section N+1 cable sleeve 100. At this time, the axis of section N+1 cable sleeve 100 passes through the center hole 210 of disc 21. Limiting strip 22 can limit disc 21 to the port of section N+1 cable sleeve 100, preventing disc 21 from slipping into section N+1 cable sleeve 100; verify the center of section N+1 cable sleeve 100 opposite to the front anchor plate 103.

[0061] Fixing the (N+1)th section of the cable sleeve 101: Fix the (N+1)th section of the cable sleeve 101 to the first section of the cable sleeve 100. The fixing method is well known to those skilled in the art and will not be described in detail here. Fix the (N+1)th section of the cable sleeve 101 to the base rod 11 using the fixing strip 16. The fixing method is the same as in step "Fixing the first section of the cable sleeve 100" and will not be described in detail here. Remove the arc-shaped strip 13, the transverse bolt 14 and the nut on the transverse bolt 14, the vertical bolt 15 and the nut on the vertical bolt 15, and the U-shaped frame 12 from the positioning frame 1 and reuse them. This completes the installation and fixing of the (N+1)th section of the cable sleeve 101.

[0062] Installation of the last anchor plate 104: When the N+1th section of the cable sleeve 101 is the last section of the cable sleeve, the last anchor plate 104 is installed on the end of the N+1th section of the cable sleeve 101 that is away from the first section of the cable sleeve 100, thus completing the installation of the cable sleeve assembly.

[0063] In this embodiment, the method for step "verification of the center point of the first section of the cable sleeve 100" is the same as that for step "verification of the center point of the (N+1)th section of the cable sleeve 101". Specifically, a reflective prism 3 is inserted at the center hole 210, and a total station is placed at the end of the cable strand axis away from the front anchor plate 103. The total station is used to check whether the reflective prism 3 is on the straight line of the cable strand axis. By verifying the center point of the cable sleeve using the positioning disk 2 in conjunction with the reflective prism 3 and the total station, objective data can be obtained with the help of auxiliary tools, making the axis of the cable sleeve more accurately determined.

[0064] The installation method for the suspension bridge anchor cable sleeve using the aforementioned positioning device has the following advantages:

[0065] 1. The above method only requires confirming that the center of the arc strip 13 coincides with the measuring rope 4 to determine the installation position of the axis of the first section of the cable sleeve 100 and the N+1th section of the cable sleeve 101. Compared with the repeated adjustment operation in the prior art, it is not only simpler but also has a much higher accuracy.

[0066] 2. By rotating the two vertical rods 122, the axes of the first section of the cable sleeve 100 and the N+1th section of the cable sleeve 101 are finely adjusted. After further confirming that the corresponding axes are perpendicular to the design plane, the first section of the cable sleeve 100 and the N+1th section of the cable sleeve 101 are fixed. This can further improve the coincidence of the axes of the first section of the cable sleeve 100 and the N+1th section of the cable sleeve 101 with the cable strand axis.

[0067] It is evident that the method of adjusting the axis of the first section of the cable sleeve 100 and the N+1th section of the cable sleeve 101 can quickly and accurately determine the precise installation position of the cable sleeve during construction.

[0068] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. A method for installing an anchor cable sleeve for a suspension bridge, characterized in that, Includes the following steps: Preparation of auxiliary equipment: A positioning device is provided, the positioning device including a positioning frame (1), the positioning frame (1) including a base rod (11), a U-shaped frame (12), an arc strip (13) and two transverse bolts (14), the U-shaped frame (12) having an adjustment groove (120), the bottom of the U-shaped frame (12) corresponding to the adjustment groove (120) being connected to the base rod (11) and the U-shaped frame (12) being able to rotate relative to the base rod (11), the arc strip (13) being located in the adjustment groove (120) and the two ends of the arc strip (13) extending toward the side away from the base rod (11), one end of the two transverse bolts (14) being respectively connected to the opposite ends of the arc strip (13), and the two transverse bolts (14) being respectively threaded into the opposite ends of the U-shaped frame (12); the base rod (11) having a movable opening through the arc strip (13) The groove (110) extends along the length of the bottom rod (11); the U-shaped frame (12) has a transverse groove (123) corresponding to the moving groove (110), and a vertical bolt (15) passes through the moving groove (110) and the transverse groove (123); a top nut (151), two middle nuts (152) and a bottom nut (153) are screwed onto one end of the vertical bolt (15). The top nut (151) is located on the side of the U-shaped frame (12) away from the bottom rod (11), the two middle nuts (152) are located between the U-shaped frame (12) and the bottom rod (11), the bottom nut (153) is located on the side of the bottom rod (11) away from the crossbar (121) of the U-shaped frame (12), and the other end of the vertical bolt (15) passes through the arc strip (13) and is screwed to the arc strip (13); Preliminary preparations: The cable sleeve assembly includes a front anchor plate (103), a first section of cable sleeve (100), an N+1th section of cable sleeve (101), and a final anchor plate (104), where N≥1. The first section of cable sleeve (100) and the N+1th section of cable sleeve (101) have the same structure, and the arc-shaped strip (13) is adapted to the outer diameter of the first section of cable sleeve (100). Construction scaffolding is erected, and the construction scaffolding includes a design surface perpendicular to the cable strand axis. The front anchor plate (103) is installed. Arrange the positioning frame (1): fix the bottom rod (11) to the construction scaffold and make the arc strip (13) opposite to the front anchor plate (103); Determining the axis of the first section of the cable sleeve (100): A measuring rope (4) is provided, and one end of the measuring rope (4) is fixed at the center of the front anchor plate (103). The measuring rope (4) is straightened and the end of the measuring rope (4) away from the front anchor plate (103) is aligned with the center of the arc strip (13) and fixed. By controlling the two transverse bolts (14), the arc strip (13) is moved along the length direction of the bottom rod (11). When the center of the arc strip (13) moves to the cable strand axis, the movement of the arc strip (13) is stopped. Then the measuring rope (4) is the axis of the first section of the cable sleeve (100). Adjust the angle between the first section of the cable sleeve (100) and the design surface: detach the measuring rope (4), align one end of the first section of the cable sleeve (100) with the front anchor plate (103), support the body of the first section of the cable sleeve (100) on the arc strip (13), drive the U-shaped frame (12) to rotate relative to the bottom rod (11), so that the axis of the first section of the cable sleeve (100) is perpendicular to the design surface; Fixing the first section of the cable sleeve (100): Fix the front anchor plate (103) to the first section of the cable sleeve (100), fix the first section of the cable sleeve (100) to the bottom rod (11) through the fixing strip (16), remove the arc strip (13), the transverse bolt (14), and the U-shaped frame (12) from the positioning frame (1) and reuse them, thus completing the installation and fixing of the first section of the cable sleeve (100); Determining the axis of the N+1th section of the cable sleeve (101): Fix the bottom rod (11) of another positioning frame (1) to the construction scaffold and make the corresponding arc strip (13) opposite to the end of the first section of the cable sleeve (100) away from the front anchor plate (103). Make one end of the measuring rope (4) correspond to and fix the center point of the first section of the cable sleeve (100). Straighten the measuring rope (4) and make the end of the measuring rope (4) away from the first section of the cable sleeve (100) correspond to and fix the center of the arc strip (13). By controlling the two transverse bolts (14), make the arc strip (13) move along the length direction of the bottom rod (11). When the center of the arc strip (13) moves to the cable strand axis, stop moving the arc strip (13). That is, determine the axis of the N+1th section of the cable sleeve (101). Adjust the angle between the N+1 section of the cable sleeve (101) and the design surface: detach the measuring rope (4), align one end of the N+1 section of the cable sleeve (101) with the end of the first section of the cable sleeve (100) away from the front anchor plate (103), support the tube body of the N+1 section of the cable sleeve (101) on the arc strip (13) of another positioning frame (1), drive the U-shaped frame (12) to rotate relative to the corresponding bottom rod (11), so that the axis of the N+1 section of the cable sleeve (101) is perpendicular to the design surface; Fixing the N+1th section of the cable sleeve (101): Fixing the N+1th section of the cable sleeve (101) to the first section of the cable sleeve (100), fixing the N+1th section of the cable sleeve (101) to the bottom rod (11) through the fixing strip (16), removing the arc strip (13), the transverse bolt (14), and the U-shaped frame (12) from the positioning frame (1) and reusing them, thus completing the installation and fixing of the N+1th section of the cable sleeve (101); Installation of the last anchor plate (104): When the N+1th section of the cable sleeve (101) is the last section of the cable sleeve, the last anchor plate (104) is installed at the end of the N+1th section of the cable sleeve (101) away from the first section of the cable sleeve (100), thus completing the installation of the cable sleeve assembly.

2. The installation method of the suspension bridge anchor cable sleeve as described in claim 1, characterized in that: The positioning device further includes a positioning disc (2), which includes a disc (21) and a limiting strip (22). The outer diameter of the disc (21) is consistent with the inner diameter of the first section of the cable sleeve (100). A central hole (210) is provided through the center of the disc (21). The limiting strip (22) is fixedly disposed on one side of the disc (21) and the opposite ends of the limiting strip (22) extend to the outside of the disc (21). Before the step of "fixing the first section of the cable sleeve (100)", the center point of the first section of the cable sleeve (100) needs to be checked: the disc (21) is fitted onto the port of the first section of the cable sleeve (100) away from the front anchor plate (103) and the center of the first section of the cable sleeve (100) away from the front anchor plate (103) is checked; Before the step of "fixing the N+1th section of the cable sleeve (101)", it is necessary to perform "re-checking the center point of the N+1th section of the cable sleeve (101): insert the disc (21) into the port of the N+1th section of the cable sleeve (101) away from the first section of the cable sleeve (100) and check the center of the end of the N+1th section of the cable sleeve (101) away from the first section of the cable sleeve (100); In the step "Determination of the axis of the N+1th section of the cable sleeve (101)", after "verification of the center point of the first section of the cable sleeve (100)", the center hole (210) of the disc (21) coincides with the center point of the first section of the cable sleeve (100). At this time, one end of the measuring rope (4) can be aligned with the center hole (210) of the disc (21).

3. The installation method of the suspension bridge anchor cable sleeve as described in claim 2, characterized in that, The method for step "Center point verification of the first section of the cable sleeve (100)" is the same as that for step "Center point verification of the N+1th section of the cable sleeve (101)": A reflective prism (3) is inserted at the central hole (210), and a total station is placed at the end of the cable strand axis away from the front anchor plate (103). The total station is used to detect whether the reflective prism (3) is on the straight line of the cable strand axis.

4. The installation method of the suspension bridge anchor cable sleeve as described in claim 2, characterized in that: The positioning frame (1) also includes a vertical bolt (15), which passes through the bottom of the arc-shaped strip (13), the bottom of the U-shaped frame (12), and the bottom rod (11) in sequence. The vertical bolt (15) can rotate, move, or be fixed relative to the bottom rod (11) so that the U-shaped frame (12) can rotate relative to the bottom rod (11) about the vertical bolt (15) as an axis. In the step "Determining the axis of the first section of the cable sleeve (100)", the vertical bolt (15) works with the two horizontal bolts to adjust the axis of the first section of the cable sleeve (100); In step "Determining the axis of the N+1th section of the cable sleeve (101)," the vertical bolt (15) of another positioning frame (1) works with two corresponding horizontal bolts to adjust the axis of the N+1th section of the cable sleeve (101); In the step "Center point verification of the first section of the cable sleeve (100)", the vertical bolt (15) is used in conjunction with the two horizontal bolts to adjust the center point of the first section of the cable sleeve (100); In the step "Center point verification of the N+1th section of the cable sleeve (101)", the vertical bolt (15) of another positioning frame (1) is used in conjunction with two corresponding horizontal bolts to adjust the center point of the N+1th section of the cable sleeve (101).

5. The installation method of the suspension bridge anchor cable sleeve as described in claim 1, characterized in that: The U-shaped frame (12) includes a horizontal bar (121) and two vertical bars (122). The horizontal bar (121) extends along the length of the bottom bar (11) and is rotatably connected to the bottom bar (11). The two vertical bars (122) are arranged in parallel opposite directions, and one end of the two vertical bars (122) is connected to the opposite ends of the horizontal bar (121). The arc-shaped strip (13) is located between the two vertical bars (122). One end of a horizontal bolt (14) is rotatably inserted through one end of a vertical bar (122) away from the horizontal bar (121), and the other end of the horizontal bolt (14) is connected to the end of the arc-shaped strip (13) corresponding to it. The horizontal bar (121) has a horizontal moving groove (123) corresponding to the moving groove (110), and the vertical bolt (15) is arranged through the horizontal moving groove (123) and the moving groove (110).

6. The installation method of the suspension bridge anchor cable sleeve as described in claim 2, characterized in that: The number of the limiting strips (22) is two, and the two limiting strips (22) are arranged at intervals along the diameter of the disk (21).

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