Suspension bridge rotary cable main cable strand horizontal saddle-entering back pressure tool

Abstract

The utility model belongs to the field of rotary cable suspension bridge construction, and particularly relates to a suspension bridge rotary cable main cable strand horizontal saddle-entering back pressure tool which comprises a back pressure device arranged on the outer side of the outlet end of a horizontal rotary cable saddle, and the back pressure device comprises a back pressure beam arranged over a cable strand path. The back pressure beam is provided with a plurality of back pressure lead screws which are adjustable in position in the vertical direction, the back pressure lead screws correspond to the cable strands in position in a one-to-one mode, and the back pressure lead screws are used for pressing the top faces of the cable strands downwards. The back pressure device can press the cable strand at the outlet end of the horizontal rotating cable saddle downwards, so that the cable strand does not incline upwards, the vertical component force of the cable strand in an empty cable shape on the partition plate is reduced, the stress on the two sides and the two length ends of the partition plate is balanced, and the deformation of the partition plate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction of a rotary cable suspension bridge, and in particular relates to a horizontal saddle-entering counter-pressure tooling for a main cable strand of a rotary cable of a suspension bridge. Background Art

[0002] The main saddles and loose saddles of the main cables of conventional suspension bridges are both arranged vertically, using a regular hexagonal symmetrical arrangement. The cables are stacked one by one from bottom to top, with steel partitions installed between each row of cables. For the revolving cable suspension bridge described in patent CN118145433A, the revolving cable forms a 180° revolving system through one set of horizontal revolving saddles, one set of horizontal main saddles, and one set of horizontal revolving saddles installed on the revolving end anchor body. The free cable shape of the revolving cable at the horizontal revolving saddle is 0.852° (upward) to the horizontal line of the saddle, and the bridge shape is 1.165° (downward) to the horizontal line of the saddle. Because the free cable shape of the cable strands is tilted upward, the strands tend to deflect upward during installation. This results in a large vertical component of the cable strands exerting an influence on the partitions at the exit of the horizontal revolving saddles, which can easily cause severe deformation of the partitions, affecting construction quality and speed.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a horizontal saddle back-pressure tooling for main cable strands of a revolving cable of a suspension bridge.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A horizontal saddle-entering back-pressure tooling for the main cable strands of a suspension bridge revolving cable comprises a back-pressure device arranged on the outside of the outlet end of the horizontal revolving cable saddle, the back-pressure device comprising a back-pressure beam arranged directly above the cable strand path, the back-pressure beam being provided with a plurality of back-pressure screw rods whose positions are adjustable in the vertical direction, the back-pressure screw rods corresponding one-to-one to the position of each row of cable strands, and the back-pressure screw rods being used to press down the top surface of each row of cable strands.

[0007] Furthermore, the counter-pressure device includes a vertically arranged column, and the counter-pressure beam is vertically fixed on one side of the column.

[0008] Furthermore, the back pressure device also includes a plurality of first connecting plates; the column includes two sub-columns arranged side by side, and each of the first connecting plates is fixed on the two columns at the same time to connect the two columns into a whole.

[0009] Furthermore, a plurality of arms for supporting the columns are fixed on the columns.

[0010] Furthermore, a plurality of through holes are vertically opened on the back-pressure beam, the back-pressure screw passes through the through holes and a first locking member and a second locking member are threadedly installed on the back-pressure screw, the first locking member rests against the top surface of the back-pressure beam after being tightened, and the second locking member rests against the bottom surface of the back-pressure beam after being tightened.

[0011] Furthermore, a pad is provided between the counter-pressure screw rod and the cable strand steel wire to transitionally protect the steel wire and avoid hard contact.

[0012] Furthermore, the counter-pressure beam is made of 32a I-steel, and the counter-pressure screw rod is made of φ32mm full screw rod.

[0013] Furthermore, the back pressure device includes a 1# back pressure device arranged 50cm-80cm outside the outlet end of the horizontal turning saddle.

[0014] Furthermore, the back-pressure device also includes a 2# back-pressure device arranged 3-4.5 m outside the 1# back-pressure device. The 2# back-pressure device has the same structure as the 1# back-pressure device, and the back-pressure beam of the 2# back-pressure device is also arranged directly above the cable strand path.

[0015] The beneficial effects of the utility model are:

[0016] The counter-pressure device of the present invention can press down the cable strands at the outlet end of the horizontal cable saddle, so that the cable strands do not tilt upward, reducing the vertical component of the empty cable linear cable strands on the partition, making the forces on both sides of the partition and at both ends of the length more balanced, and reducing the deformation of the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.

[0018] Figure 1 This is a schematic diagram of an application of an embodiment of the present utility model.

[0019] Figure 2 This is a structural diagram of the 1# back pressure device according to an embodiment of the present utility model.

[0020] Figure 3 This is a schematic structural diagram of the 2# back pressure device according to an embodiment of the present invention.

[0021] Figure 4 Design of cable strand arrangement for the horizontal turning saddle of the slewing main cable in a certain project.

[0022] In the figure: 1-horizontally rotating saddle, 20-1# back-pressure device, 30-2# back-pressure device, 29-column, 21-first connecting plate, 22-arm, 23-back-pressure beam, 24-oblique pulling arm, 25-back-pressure screw, 26-first locking piece, 27-second locking piece, 28-pad. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0024] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0026] like Figures 1 to 3 As shown, a horizontal saddle counter-pressure tooling for the main cable strands of the revolving cable of a suspension bridge comprises a counter-pressure device arranged on the outside of the outlet end of the horizontal revolving saddle 1, the counter-pressure device comprising a vertically arranged column 29, a counter-pressure beam 23 vertically fixed to one side of the column 29, and a plurality of counter-pressure screws 25 vertically arranged on the counter-pressure beam 23, the position of the counter-pressure screws 25 being adjustable and locked in the vertical direction; the counter-pressure beam 23 being arranged just above the cable strand path, the counter-pressure screws 25 corresponding to the position of each column of cable strands one by one, so that after adjusting the position of the counter-pressure screws 25, the counter-pressure screws 25 can be pressed down onto the top surface of the cable strands, pressing the cable strands downward so that the elevation of the top surface of the cable strands is lower than the elevation of the bottom surface of the revolving saddle outlet partition, so that the cable strands no longer generate an upward component force exerted on the partition at the outlet end of the horizontal revolving saddle 1, thereby reducing the deformation of the partition.

[0027] Further, such as Figure 1As shown, the column 29 includes two sub-columns arranged side by side, and the two sub-columns are connected into a whole through a plurality of first connecting plates 21, and the plurality of first connecting plates 21 are respectively arranged on different sides of the sub-columns. Correspondingly, the back pressure beam 23 includes two sub-beams arranged side by side, and the two sub-beams are connected into a whole through a second connecting plate 231; the second connecting plate 231 can be fixed on the top surface, bottom surface or end surface of the two sub-beams; preferably, Figures 1 to 3 As shown in FIG, a second connecting plate 231 is welded and fixed on the top surface of the sub-beam, and another second connecting plate 231 is welded and fixed on the bottom surface of the sub-beam. In order to reinforce the counter-pressure beam 23, a diagonal arm 24 is also fixed between the counter-pressure beam 23 and the column 29.

[0028] Further, such as Figures 1 to 3 As shown, a number of arms 22 are fixed on the column 29, and embedded parts are embedded in the anchor body of the swing bank. Since the column 29 is set in the annular channel of the swing bank anchor of the swing cable suspension bridge, it needs to be removed after the saddle construction is completed. Therefore, the column 29 is erected on the concrete surface of the annular channel by fixing the arm 22, so that the arm 22 can be cut and the back pressure device can be removed in the later stage.

[0029] In a specific example, the column 29, the counter-pressure beam 23, the inclined arm 24, and the support arm 22 all use two I32a I-beams, the counter-pressure screw rod 25 uses a φ32mm full-thread rod, the first locking piece 26 and the second locking piece 27 are nuts matching the φ32mm full-thread rod; the first connecting piece is made of 310×100×10mm steel plate, and the second connecting piece is made of 10mm thick steel plate; the I-beams of the two support arms 22 are also connected and fixed by the first connecting piece.

[0030] Further, such as Figure 2 and Figure 3 As shown, a pad 28 is provided between the counter-pressure screw rod 25 and the cable strand steel wire to transitionally protect the steel wire and avoid hard contact; specifically, the pad 28 is made of 600mm×60mm×60mm square wood.

[0031] Further, such as Figures 1 to 3 As shown, a plurality of through holes are vertically opened on the back-pressure beam 23, the back-pressure screw rod 25 passes through the through holes and a first locking member 26 and a second locking member 27 are threadedly mounted on the back-pressure screw rod 25. After the first locking member 26 is tightened, it abuts against the top surface of the back-pressure beam 23, and after the second locking member 27 is tightened, it abuts against the bottom surface of the back-pressure beam 23; thereby, by adjusting the positions of the first locking member 26 and the second locking member 27, the downward extension length of the back-pressure screw rod 25 can be adjusted, and the elevation of the downwardly pressed cable strand can be adjusted.

[0032] Preferably, Figure 1As shown, the counter-pressure device includes a 1# counter-pressure device, located 50-80 cm outside the exit of the horizontal cable saddle 1, and a 2# counter-pressure device, located 3.0-4.5 m outside the 1# counter-pressure device. The 2# counter-pressure device has the same structure as the 1# counter-pressure device, and its counter-pressure beam 23 is also located directly above the cable strand path. For example, the 1# counter-pressure device can be located 50 cm from the exit of the horizontal cable saddle 1, and the 2# counter-pressure device can be located 3.5 m from the exit of the horizontal cable saddle 1. The 3 m distance meets the minimum straight length of the cable strand after entering the saddle in this project. The 1# counter-pressure device is welded to the cable saddle limit block via a support arm 22; the 2# counter-pressure device is welded to the anchor body concrete embedded steel plate. Due to their different locations, the support arm 22 of the 2# counter-pressure device is longer than that of the 1# counter-pressure device.

[0033] Taking the main cable in CN118145433A as an example, the strands of the main cable are arranged in accordance with Figure 4 The 13×13 arrangement design of 121 cables is as follows: Figure 4 The horizontal table and cable strand arrangement of the horizontal cable saddle 1 are schematically shown in the figure. The cables are arranged within a 45° slope. During the insertion process, the maximum number of cables installed in adjacent channels does not exceed 2. The cables are inserted into the horizontal cable saddle 1 in the order from smallest to largest number.

[0034] The utility model installs 9 to 13 counter-pressure screws 25 on the counter-pressure beam 23, which can ensure that the length of the partition is not deformed by force during the entire process of saddle-loading the rotating main cable strands. When the number of counter-pressure screws 25 is 9 to 12, they need to be appropriately moved according to the cable strand position during use. When the number of counter-pressure screws 25 is 13, that is, there is one counter-pressure screw 25 in each row, the counter-pressure screws 25 do not need to be moved during use. After saddle loading is completed, the counter-pressure screws 25 can be directly removed from the counter-pressure beam 23 when no longer needed.

[0035] Next, the alternating back pressure steps of the present invention are described by taking the saddle insertion of the 58# to 65# strands of the rotary main cable in the CN118145433A patent as an example:

[0036] 1. Use back-pressure screws 25 to counter-tighten all strands already saddled. During back-pressure, place a 600×60×60mm square timber transition between the strand wire and the screw to protect the wire and prevent hard contact. Use a level to measure the elevation of the two back-pressure devices on the same strand. Ensure that the strand top surface at back-pressure device #2 is lower than that at back-pressure device #1 before proceeding to the next step of saddle-setting a new strand. For example, after strand #57 is saddled, use back-pressure screws 25 to counter-tighten it.

[0037] 2. Reference Figures 2 to 3For example, if a new 60# cable strand needs to be inserted into the saddle, the counter-pressure screw rods 25 above the 58#, 59#, and 51# cable strands need to be loosened. The counter-pressure screw rods 25 are loosened by loosening the nuts on the bottom surface of the counter-pressure beam 23. Then, the nuts on the top surface of the counter-pressure beam 23 are tightened to lift all the screw rods to reserve space for the 60# cable strand to enter. After the 60# cable strand is in place, square wood is used to tighten the cable strand steel wire cross-section at the cable saddle outlet. Then, the cable strand is positioned under the screw rod of the 1# counter-pressure beam 23. After adjusting the position and wire size of the 60# cable strand, the nuts on the top surface of the counter-pressure beam 23 are loosened, the 60# counter-pressure screw rod 25 is lowered, and the nuts on the bottom surface of the counter-pressure beam 23 are tightened to tighten the cable strands. Check that the cable strand top surface elevation is lower than the bottom surface elevation of the cable saddle outlet partition. Then, the counter-pressure screw rods 25 above the 58# and 59# cable strands can be restored. Next, at the 2# counter-pressure device, first loosen the counter-pressure screw rods 25 above the 58#, 59#, and 51# cables. Similarly, loosen the nuts on the bottom of the counter-pressure beam 23 to loosen the counter-pressure screw rods 25. Then, tighten the nuts on the top of the counter-pressure beam 23 to lift all the screw rods to reserve space for the 60# cable. After the 60# cable is positioned below the screw rod of the 2# counter-pressure beam 23 and the position and wire size of the 60# cable are adjusted, loosen the nuts on the top of the counter-pressure beam 23, lower the 60# counter-pressure screw rod 25, and tighten the nuts on the bottom of the counter-pressure beam 23 to tighten the cables. Check that the cable top surface elevation is lower than that of the cable top surface at the 1# counter-pressure device. Then, restore the counter-pressure screw rods 25 above the 58# and 59# cables. The saddle installation process for the 58#, 59#, and 61#-65# cables is similar to the saddle installation process for the 60# cable.

[0038] 3. Before adjusting the cables erected during the day at night, loosen the counter-pressure screw 25 of the 2# counter-pressure device to free all cables. This is because the 1# counter-pressure device is 50 cm from the saddle outlet, while the 2# counter-pressure device is 3.5 m from the saddle outlet. Therefore, the 1# counter-pressure device does not affect cable strand fine-tuning, while the 2# counter-pressure device does. Therefore, before fine-tuning at night, release the cables held back by the 2# counter-pressure device.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A horizontal saddle back pressure tooling for main cable strands of a suspension bridge revolving cable, characterized by: The invention comprises a back-pressure device arranged on the outside of the outlet end of the horizontal turning cable saddle, wherein the back-pressure device comprises a back-pressure beam (23) arranged just above the cable strand path, and the back-pressure beam (23) is provided with a plurality of back-pressure screw rods (25) whose positions are adjustable in the vertical direction, wherein the back-pressure screw rods (25) correspond to the positions of each row of cable strands one by one, and the back-pressure screw rods (25) are used to press down the top surface of each row of cable strands.

2. The horizontal saddle back-pressure fixture for main cable strands of a suspension bridge revolving cable according to claim 1 is characterized in that: The counter-pressure device comprises a vertically arranged column (29), and the counter-pressure beam (23) is vertically fixed on one side of the column (29).

3. The horizontal saddle back-pressure tooling for main cable strands of a suspension bridge revolving cable according to claim 2 is characterized in that: The back pressure device further comprises a plurality of first connecting plates (21); the upright column (29) comprises two sub-columns arranged side by side, and each of the first connecting plates (21) is simultaneously fixed on the two upright columns (29) to connect the two into a whole.

4. The horizontal saddle back-pressure fixture for main cable strands of a suspension bridge revolving cable according to claim 2 is characterized in that: A plurality of support arms (22) for supporting the columns (29) are fixed on the columns (29).

5. The horizontal saddle back-pressure tooling for main cable strands of a suspension bridge revolving cable according to claim 2 is characterized in that: A diagonal arm (24) is fixed between the upright column (29) and the counter-pressure beam (23).

6. The horizontal saddle back-pressure fixture for main cable strands of a suspension bridge revolving cable according to claim 1 is characterized in that: The back-pressure beam (23) is vertically provided with a plurality of through-holes, the back-pressure screw rod (25) passes through the through-holes, and a first locking member (26) and a second locking member (27) are threadedly mounted on the back-pressure screw rod (25), the first locking member (26) being tightened to abut against the top surface of the back-pressure beam (23), and the second locking member (27) being tightened to abut against the bottom surface of the back-pressure beam (23).

7. The horizontal saddle back-pressure fixture for main cable strands of a suspension bridge revolving cable according to claim 1 is characterized in that: A pad (28) is provided between the counter-pressure screw rod (25) and the cable strand steel wire to transitionally protect the steel wire.

8. The horizontal saddle back-pressure fixture for main cable strands of a suspension bridge revolving cable according to claim 1 is characterized in that: The back-pressure beam (23) is made of 32a I-steel, and the back-pressure screw rod (25) is made of a φ32mm full screw rod.

9. The horizontal saddle back-pressure tooling for main cable strands of a suspension bridge revolving cable according to claim 1 is characterized in that: The back pressure device includes a 1# back pressure device arranged 50 cm to 80 cm outside the outlet end of the horizontal turning saddle.

10. The horizontal saddle back-pressure fixture for main cable strands of a suspension bridge revolving cable according to claim 9, characterized in that: The back pressure device further comprises a 2# back pressure device arranged 3-4.5 m outside the 1# back pressure device. The 2# back pressure device has the same structure as the 1# back pressure device, and the back pressure beam (23) of the 2# back pressure device is also arranged directly above the cable strand path.

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