Efficient cable changing system of multi-tower cable-stayed bridge

Abstract

The utility model relates to an efficient cable changing system for a multi-tower cable-stayed bridge. The efficient cable changing system comprises a tower top hanging bracket, in-tower tensioning equipment, a first winch, tensioning equipment and a steel pipe diagonal bracing auxiliary stay cable hanging platform. The in-tower tensioning equipment and the first winch are mounted at the tower top, and the in-tower tensioning equipment is used for releasing the old inclined inhaul cable at the tower end; a plurality of rows of steel pipe diagonal bracing auxiliary hanging stay cable platforms are installed at different heights between tower columns of the cable bent tower and used for hanging old stay cables and new stay cables detached from the tower end in a relay mode. The utility model has the beneficial effects that the steel pipe diagonal bracing auxiliary stay cable hoisting technology between the tower columns is adopted, so that the construction safety and efficiency are effectively improved, the construction in a severe environment is adapted, the stress performance is obviously improved, and the construction risk is reduced; by the adoption of the old stay cable tower end staged tension releasing technology, accurate control and safe operation in the old stay cable staged tension releasing and dismounting process are achieved, the construction risk is effectively reduced, the construction efficiency is improved, and meanwhile the stability and safety of a bridge structure are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and in particular comprises a high-efficiency cable-changing system for a multi-tower cable-stayed bridge. Background Art

[0002] With rapid economic development, highway mileage continues to increase. As a crucial component of highway engineering, bridges' stay cables are crucial for structural stability and driving safety. During bridge operation, these cables are susceptible to concrete shrinkage and creep, external load impacts, and natural climate and environmental factors, leading to damage that impacts vehicle comfort and safety.

[0003] The traditional method of replacing cable-stayed bridges is time-consuming, affects traffic flow, and cannot meet the current traffic needs. Therefore, it is very important and necessary to develop a technology for efficiently and quickly replacing cables in multi-tower cable-stayed bridges. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a high-efficiency cable-changing system for a multi-tower cable-stayed bridge.

[0005] This high-efficiency cable-replacing system for a multi-tower cable-stayed bridge includes: a tower top hanger, tensioning equipment inside the tower, the first winch, tensioning equipment, and a steel pipe bracing platform for auxiliary cable-stayed cable placement.

[0006] The tensioning equipment inside the tower and the first winch are installed on the top of the tower. The tensioning equipment inside the tower is used to tension the old cable-stayed cables at the tower end. Several rows of steel pipe supports are installed at different heights between the tower columns to assist in lifting the cable-stayed cables. Each row of steel pipe supports on the cable-stayed cables-supporting platforms is equipped with a second winch. The first winch and the second winches on the several rows of steel pipe supports on the cable-stayed cables-supporting platforms are used to relay the lifting of the old and new cable-stayed cables removed from the tower end.

[0007] Preferably, the tensioning equipment in the tower and the first winch are installed on the top of the tower. The tower end cable includes a conduit, a connecting sleeve, an old cable anchor cup and an old cable anchor cup nut. The conduit has a built-in shock absorber, and the connecting sleeve is adapted to the thread inside the old cable anchor cup.

[0008] Preferably, the tensioning equipment inside the tower includes: tensioning rods, tensioning rod nuts, jacks, tensioning legs, connecting sleeves, jack cylinders, auxiliary tensioning rods, auxiliary tensioning rod nuts, tensioning rod auxiliary nuts, pads, first tool anchors and pressure plates, second tool anchors and pressure plates, soft traction connectors and tower end construction hanging baskets.

[0009] Preferably, a lightning rod and a tower top hanger are installed on the top of the tower column. The tower top hanger is used to hoist the first winch to the top of the tower. The first row of steel pipe pair support auxiliary lifting inclined cable platform, the second row of steel pipe pair support auxiliary lifting inclined cable platform, the third row of steel pipe pair support auxiliary lifting inclined cable platform, the fourth row of steel pipe pair support auxiliary lifting inclined cable platform and the fifth row of steel pipe pair support auxiliary lifting inclined cable platform are installed in sequence between the tower columns from bottom to top, and each row of steel pipe pair support auxiliary lifting inclined cable platform is equipped with a second winch.

[0010] Preferably, a deck winch and a deck pull rope are provided on the bridge deck to pull the cable extension trolley to move the old cable-stayed cable.

[0011] Preferably, a steel pipe supporting auxiliary lifting cable-stayed platform is provided with supporting steel pipes at the bottom, and the supporting steel pipes are fixed on both sides of the cable tower column using supporting steel pipe installation embedded parts, and a first guardrail is installed on both sides of the auxiliary lifting construction platform.

[0012] The beneficial effects of the utility model are:

[0013] 1) The utility model adopts the technology of supporting steel pipes between tower columns to assist in the lifting of inclined cables, which effectively improves the construction safety and efficiency, adapts to construction in harsh environments, significantly improves the stress-bearing performance, and reduces construction risks.

[0014] 2) The utility model adopts the technology of phased tensioning of the tower ends of the old inclined cables, which realizes precise control and safe operation during the phased tensioning and disassembly process of the old inclined cables, effectively reduces construction risks, improves construction efficiency, and ensures the stability and safety of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the first stage of tower end tensioning in which the tension rod nut is rotated a certain distance away from the jack cylinder;

[0016] Figure 2 This is a schematic diagram of the old cable anchor cup nut being detached from the anchor plate during the first stage of tower end placement;

[0017] Figure 3 This is a schematic diagram of the first stage of placing the old cable anchor cup nut on the anchor pad at the tower end;

[0018] Figure 4 This is a schematic diagram of the first stage of placing the old cable anchor cup in the tower end and screwing the nut to the flat cap;

[0019] Figure 5 This is a schematic diagram of the second stage of placing the auxiliary tension rod at the tower end and rotating the nut away from the jack cylinder to a certain distance;

[0020] Figure 6 This is a schematic diagram of the second stage of placing the old cable anchor cup and unscrewing the nut from the old cable anchor cup at the tower end;

[0021] Figure 7 This is a schematic diagram of installing a pad between the old cable anchor cup nut and the tension rod auxiliary nut during the second stage of tensioning at the tower end;

[0022] Figure 8 This is a schematic diagram of the tower end tensioning tie rod secondary nut being screwed to the flat cap state during the second stage of tensioning.

[0023] Figure 9 This is a schematic diagram of the third stage of tensioning the tower end, where the secondary nut of the tension rod is separated from the old cable anchor cup nut;

[0024] Figure 10 This is a schematic diagram of the third stage of placing the old cable anchor cup at the tower end down a certain distance;

[0025] Figure 11 This is a schematic diagram of the construction structure of the tower end construction hanging basket;

[0026] Figure 12 This is a schematic diagram of the structure of the old cable-stayed cables assisted by the steel pipe bracing between the tower columns;

[0027] Figure 13 This is the plan layout of the efficient cable replacement deck construction for a multi-tower cable-stayed bridge;

[0028] Figure 14 This is a schematic diagram of the new cable-stayed structure using steel pipe bracing between tower columns to assist in lifting the new cable.

[0029] Explanation of the accompanying symbols: 1-tower column, 2-bridge deck, 3-first pair of supporting steel pipes, 4-embedded parts for installing the pair of supporting steel pipes, 5-first auxiliary lifting and construction platform, 6-first guardrail, 7-second pair of supporting steel pipes, 8-second auxiliary lifting and construction platform, 9-second guardrail, 10-third pair of supporting steel pipes, 11-third auxiliary lifting and construction platform, 12-third guardrail, 13-fourth pair of supporting steel pipes, 14-fourth auxiliary lifting and construction platform, 15-fourth guardrail, 16-fifth pair of supporting steel pipes, 17-fifth auxiliary lifting and construction platform, 18-fifth guardrail, 19-tower top hanger, 20-lightning rod, 21-first winch, 22-first lifting rope, 23-first hook, 24-second winch Winches, 25-second lifting rope, 26-second lifting hook, 27-old inclined cable, 28-cable extension trolley, 29-new inclined cable, 30-bridge winch, 31-bridge deck pull rope, 32-tensioning rod, 33-tensioning rod nut, 34-jack, 35-tensioning support foot, 36-connecting sleeve, 37-old cable anchor cup, 38-old cable anchor cup nut, 39-jack cylinder, 40-anchor plate, 41-secondary tensioning rod, 42-secondary tensioning rod nut, 43-tensioning rod secondary nut, 44-pad, 45-steel strand, 46-built-in shock absorber of tower end cable guide, 47-first tool anchor and pressure plate, 48-second tool anchor and pressure plate, 49-soft traction connector, 50-tower end construction hanging basket. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.

[0031] As an embodiment, this efficient cable replacement system for a multi-tower cable-stayed bridge involves a technology for tensioning the old cable-stayed cables 27 at the tower ends in stages, and a technology for assisting in the lifting of the cable-stayed cables by using steel pipe bracing between tower columns, including: a tower top hanger 19, tensioning equipment inside the tower, a first winch 21, tensioning equipment, and a platform for assisting in the lifting of the cable-stayed cables by using steel pipe bracing.

[0032] The tensioning equipment inside the tower and the first winch 21 are installed on the top of the tower. The tensioning equipment inside the tower is used to tension the old cable-stayed cables 27 at the tower end. Several rows of steel pipe supports are installed at different heights between the tower columns to assist in lifting the cable-stayed cables. Each row of steel pipe supports is equipped with a second winch 24 on the cable-stayed cables. The first winch 21 and the second winches 24 on the several rows of steel pipe supports are used to relay the lifting of the old cable-stayed cables 27 and the new cable-stayed cables 29 removed from the tower end.

[0033] The described technology for releasing the old inclined cable 27 at the tower end in stages, is as follows: a tower top hanger 19 and a first hoist 21 are installed on the tower top; after the first hoist 21 is positioned and fixed, the tensioning equipment is hoisted into the tensioning position in the tower by the first hoist 21, the first hoisting rope 22 and the first hook 23; the tower top hanger 19 is used as a fixed point, the tower end construction hanging basket 50 is installed, and then the built-in shock absorber 46 of the tower end cable guide is removed, and the old cable anchor cup 37 and the old cable anchor cup nut 38 are cleaned of rust, and the connecting sleeve 36 is adapted to the inner thread of the old cable anchor cup 37 to ensure that the connecting sleeve 36 can be connected to the old cable anchor cup 37; the release of the old inclined cable 27 at the tower end is divided into the first stage of releasing the old inclined cable 27 at the tower end, the second stage of releasing the old inclined cable 27 at the tower end and the third stage of releasing the old inclined cable 27 at the tower end.

[0034] The tensioning equipment inside the tower includes: a tensioning rod 32, a tensioning rod nut 33, a jack 34, a tensioning support leg 35, a connecting sleeve 36, a jack cylinder 39, an auxiliary tensioning rod 41, an auxiliary tensioning rod nut 42, a tensioning rod auxiliary nut 43, a pad 44, a first tool anchor and a pressure plate 47, a second tool anchor and a pressure plate 48, a soft traction connector 49, and a tower end construction hanging basket 50.

[0035] Example 2

[0036] As another embodiment, this second embodiment proposes, based on the first embodiment, a more specific efficient cable replacement system for a multi-tower cable-stayed bridge:

[0037] The technology of using steel pipes to support and assist in lifting the stay cables between tower columns is as follows: a lightning rod 20 and a tower top hanger 19 are installed on the top of the tower column 1; a first winch 21, a first lifting rope 22 and a first hook 23 are hoisted to the top of the tower by using the tower top hanger 19; a first row of steel pipes to support and assist in lifting the stay cables, a second row of steel pipes to support and assist in lifting the stay cables, a third row of steel pipes to support and assist in lifting the stay cables, a fourth row of steel pipes to support and assist in lifting the stay cables and a fifth row of steel pipes to support and assist in lifting the stay cables are installed in sequence from bottom to top between tower columns 1.

[0038] The first row of steel pipes are supported to assist in the lifting of the cable-stayed platform. The first supporting steel pipes 3 are fixed on both sides of the tower column 1 by using the embedded parts 4 installed on the supporting steel pipes. The first auxiliary lifting construction platform 5 is laid on the first supporting steel pipes 3, and the first guardrails 6 are installed on both sides of the first auxiliary lifting construction platform 5.

[0039] The second row of steel pipes is used to support and assist in the lifting of the cable-stayed platform. The second pair of supporting steel pipes 7 are fixed on both sides of the tower column 1 by installing embedded parts 4, and a second auxiliary lifting construction platform 8 is laid on the second pair of supporting steel pipes 7. Second guardrails 9 are installed on both sides of the second auxiliary lifting construction platform 8.

[0040] The third row of steel pipes is used to support and assist in the lifting of the cable-stayed platform. The third pair of steel pipes 10 are fixed on both sides of the tower column 1 by installing embedded parts 4 of the pair of steel pipes. A third auxiliary lifting construction platform 11 is laid on the third pair of steel pipes 10, and a third guardrail 12 is installed on both sides of the third auxiliary lifting construction platform 11.

[0041] The fourth row of steel pipes is used to support and assist in the lifting of the cable-stayed platform. The fourth pair of supporting steel pipes 13 are fixed on both sides of the tower column 1 by using the embedded parts 4 for installing the supporting steel pipes. The fourth auxiliary lifting construction platform 14 is laid on the fourth pair of supporting steel pipes 13, and the fourth guardrails 15 are installed on both sides of the fourth auxiliary lifting construction platform 14.

[0042] The fifth row of steel pipes is used to support and assist in the lifting of the cable-stayed platform. The fifth pair of steel pipes 16 are fixed on both sides of the tower column 1 by using the embedded parts 4 for installing the supporting steel pipes. The fifth auxiliary lifting construction platform 17 is laid on the fifth pair of steel pipes 16, and the fifth guardrails 18 are installed on both sides of the fifth auxiliary lifting construction platform 17.

[0043] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. An efficient cable replacement system for a multi-tower cable-stayed bridge, characterized in that: include: The tower top hanger, the tensioning equipment inside the tower, the first winch, the tensioning equipment and the steel pipe bracing assist in the lifting and placement of the cable-stayed platform; The tensioning equipment inside the tower and the first winch are installed on the top of the tower. The tensioning equipment inside the tower is used to tension the old cable-stayed cables at the tower end. Several rows of steel pipe supports are installed at different heights between the tower columns to assist in lifting the cable-stayed cables. Each row of steel pipe supports on the cable-stayed cables-supporting platforms is equipped with a second winch. The first winch and the second winches on the several rows of steel pipe supports on the cable-stayed cables-supporting platforms are used to relay the lifting of the old and new cable-stayed cables removed from the tower end.

2. The efficient cable replacement system for a multi-tower cable-stayed bridge according to claim 1 is characterized in that: The tensioning equipment inside the tower and the first winch are installed on the top of the tower. The tower end cable includes a guide tube, a connecting sleeve, an old cable anchor cup and an old cable anchor cup nut. The guide tube has a built-in shock absorber, and the connecting sleeve is adapted to the thread inside the old cable anchor cup.

3. The efficient cable replacement system for a multi-tower cable-stayed bridge according to claim 1 is characterized in that: The tensioning equipment inside the tower includes: tensioning rods, tensioning rod nuts, jacks, tensioning legs, connecting sleeves, jack cylinders, auxiliary tensioning rods, auxiliary tensioning rod nuts, tensioning rod auxiliary nuts, pads, first tool anchors and pressure plates, second tool anchors and pressure plates, soft traction connectors and tower end construction hanging baskets.

4. The efficient cable replacement system for a multi-tower cable-stayed bridge according to claim 1 is characterized in that: A lightning rod and a tower top hanger are installed on the top of the tower column. The tower top hanger is used to hoist the first winch to the top of the tower. The first row of steel pipe pair support auxiliary lifting inclined cable platform, the second row of steel pipe pair support auxiliary lifting inclined cable platform, the third row of steel pipe pair support auxiliary lifting inclined cable platform, the fourth row of steel pipe pair support auxiliary lifting inclined cable platform and the fifth row of steel pipe pair support auxiliary lifting inclined cable platform are installed in sequence between the tower columns from bottom to top. Each row of steel pipe pair support auxiliary lifting inclined cable platform is equipped with a second winch.

5. The efficient cable replacement system for a multi-tower cable-stayed bridge according to claim 1 is characterized in that: The bridge deck is equipped with a bridge winch and a bridge rope to pull the cable-extending trolley to move the old cable-stayed cables.

6. The efficient cable replacement system for a multi-tower cable-stayed bridge according to claim 4 is characterized in that: The bottom of the steel pipe support auxiliary lifting cable-stayed platform is provided with support steel pipes, which are fixed on both sides of the cable tower column by using the support steel pipe installation embedded parts, and the first guardrails are installed on both sides of the auxiliary lifting construction platform.

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