Construction platform for maintaining and reinforcing tower top steel structure of multi-tower cable-stayed bridge

Abstract

The utility model relates to a tower top steel structure construction platform for maintaining and reinforcing a multi-tower cable-stayed bridge, which is characterized in that a bottom hoop structure is arranged at the end part of the side surface of the tower top of a main tower of a cable tower, and a safety protection enclosure bottom platform is supported and connected on the bottom hoop structure; a temporary hoisting structure is mounted at the top of a main tower of the cable bent tower and is used for hoisting a hoisting object outside the tower and assisting in hoisting a cantilever steel truss construction platform; the cantilever steel truss construction platform forms a symmetrical structure on the two sides of the middle portion of the top of the cable bent tower main tower, and the two ends of the cantilever steel truss construction platform are overhung to the outer side of the cable bent tower main tower and are provided with a second pulley block and a construction hanging basket correspondingly. The cable bent tower top safety protection fence has the advantages that the bottom hoop cable bent tower top rapid installation safety protection fence technology is adopted, the safety protection capacity of a cable bent tower top construction site is effectively improved, the construction efficiency is greatly improved through an easy-to-expand connection mode, and the operation difficulty of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a construction platform for repairing and reinforcing tower top steel structures of a multi-tower cable-stayed bridge. Background Art

[0002] Many bridges, after years of operation, face challenges requiring repair and reinforcement. This is especially true for multi-tower cable-stayed bridges, where the safety of existing lines and vehicles is paramount. The installation and removal of tower-top platforms are crucial steps in cable-stayed bridge repair and reinforcement, ensuring both worker safety and construction quality. Existing technologies still require improvement. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a construction platform for repairing and reinforcing the tower top steel structure of a multi-tower cable-stayed bridge.

[0004] This multi-tower cable-stayed bridge repair and reinforcement tower top steel structure construction platform has a bottom hoist structure installed on the side end of the top of the main tower of the cable tower, and a safety protection enclosure bottom platform is supported on the bottom hoist structure; a temporary lifting structure is installed on the top of the main tower of the cable tower to lift objects outside the tower and assist in lifting the cantilever steel truss construction platform;

[0005] The cantilever steel truss construction platform forms a symmetrical structure on both sides of the middle part of the top of the main tower of the cable tower. Both ends of the cantilever steel truss construction platform are cantilevered to the outside of the main tower of the cable tower and are respectively provided with a second pulley set and a construction basket.

[0006] Preferably, a lightning rod is installed in the middle of the main tower of the cable tower, vertical connecting columns of the safety protection enclosure are installed at the four corners of the bottom platform of the safety protection enclosure, tower top lighting lamps are installed on the vertical connecting columns of the safety protection enclosure, adjacent vertical connecting columns of the safety protection enclosure are connected by three layers of horizontal connecting rods of the safety protection enclosure, and several vertical connecting rods of the safety protection enclosure are installed between adjacent vertical connecting columns of the safety protection enclosure. The vertical connecting columns of the safety protection enclosure, the horizontal connecting rods of the safety protection enclosure and the vertical connecting rods of the safety protection enclosure form the safety protection enclosure installed on the inside of the enclosure frame.

[0007] Preferably, a closed canopy is installed on the transverse connecting rod of the uppermost safety protection enclosure, and the length, width and height of the safety protection enclosure are all larger than the bottom platform of the safety protection enclosure.

[0008] Preferably, the temporary lifting structure includes a temporary steel hanger, a first winch, a first winch lifting wire rope and a first pulley group. The temporary steel hanger is fixed to the top of the main tower of the cable tower by means of a first chemical bolt embedded reinforcement. The first winch is limited by a first winch limiting groove. The top of the main tower of the cable tower is provided with a welded base and a stiffening plate as embedded parts of the cantilever steel truss construction platform through a second chemical bolt; the cantilever steel truss construction platform forms a symmetrical structure on both sides of the middle part of the top of the main tower of the cable tower, and the cantilever steel truss construction platform is welded and fixed to the base; the cantilever steel truss construction platform includes a second winch, a second winch limiting groove, a second winch lifting wire rope, a second pulley group and a construction hanging basket.

[0009] Preferably, the hoisting objects outside the tower include: a second chemical bolt, a base, a stiffener, a pad beam, a lower chord, an upper chord, a diagonal web, a vertical pole, a pin bolt connection, a lower crossbeam, an upper crossbeam, a second winch, a second winch limit slot, a safety net, a weight bag water, a second pulley set, a construction hanging basket and a second winch hoisting wire rope.

[0010] The beneficial effects of the utility model are:

[0011] 1) The utility model adopts the technology of rapid installation of safety protection enclosure on the top of the cable tower with bottom hoop, which effectively improves the safety protection capability of the cable tower top construction site. The easy-to-expand connection method greatly improves the construction efficiency and reduces the difficulty of operation for workers.

[0012] 2) The symmetrical cantilever steel truss construction platform at the top of the cable tower of the utility model adopts the cantilever hanger-assisted lifting cable tower top assembly and displacement installation technology, which effectively improves the assembly efficiency and installation accuracy of the steel truss construction platform and ensures the safety of the construction of the symmetrical cantilever steel truss construction platform.

[0013] 3) The utility model installs a closed canopy on the transverse connecting rod of the uppermost safety protection enclosure, which effectively improves the safety of the construction site on the top of the main tower of the cable tower on rainy days. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the safety protection enclosure structure that can be quickly installed on the top of the bottom hoop tower when the canopy is in the closed state;

[0015] Figure 2 This is a schematic diagram of the safety protection enclosure structure that can be quickly installed on the top of the bottom hoop tower when the canopy is in the open state;

[0016] Figure 3 This is a schematic diagram of the installation structure of the temporary steel hanger;

[0017] Figure 4 This is a schematic diagram of the embedded parts structure of the cantilever steel truss construction platform on the top of the tower;

[0018] Figure 5 This is a schematic diagram of the assembly structure of the middle part of the cantilever steel truss construction platform on the top of the tower;

[0019] Figure 6 This is a structural diagram of the middle portion of the assembled tower top cantilever steel truss construction platform being pushed to the left;

[0020] Figure 7 This is a structural diagram of the construction platform for assembling the right cantilever part of the tower top cantilever steel truss;

[0021] Figure 8 This is a schematic diagram of the construction platform structure of the assembled tower top cantilever steel truss being pushed to the right;

[0022] Figure 9 This is a structural diagram of the construction platform for assembling the steel truss of the tower top cantilever of the left cantilever part;

[0023] Figure 10 This is a schematic diagram of the construction platform structure of the assembled tower top cantilever steel truss being pushed to the left;

[0024] Figure 11 It is a structural diagram of the pulley block and hoisting system of the cantilever steel truss construction platform on the top of the tower.

[0025] In the figure: 1-main tower, 2-lightning rod, 3-bottom hoop structure, 4-bottom platform of safety protection enclosure, 5-vertical connecting column of safety protection enclosure, 6-horizontal connecting rod of safety protection enclosure, 7-vertical connecting rod of safety protection enclosure, 8-safety protection enclosure, 9-tower top lighting, 10-enclosed canopy, 11-first chemical bolt, 12-first winch, 13-limiting groove of first winch, 14-temporary steel hanger, 15-first winch hoisting wire rope, 16-first pulley block, 17-hoisting objects outside the tower, 1 8-Second chemical bolt, 19-Base, 20-Strength plate, 21-Pad beam, 22-Lower chord, 23-Upper chord, 24-Diagonal web, 25-Vertical pole, 26-Pin shaft, 27-First counterweight, 28-Lower crossbeam, 29-Upper crossbeam, 30-Right cantilever part, 31-Left cantilever part, 32-Second counterweight, 33-Second winch, 34-Second winch limit slot, 35-Safety net, 36-Balance bag water, 37-Second pulley block, 38-Construction hanging basket, 39-Second winch lifting wire rope. DETAILED DESCRIPTION

[0026] 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.

[0027] As an example, Figures 1 to 11 As shown, the steel structure construction platform for the repair and reinforcement of the tower top of the multi-tower cable-stayed bridge is installed on the top of the main tower 1 of the cable tower. Specifically:

[0028] A bottom hoop structure 3 is installed at the side end of the top of the main tower 1 of the cable tower, and a safety protection enclosure bottom platform 4 is supported on the bottom hoop structure 3; a temporary lifting structure is installed on the top of the main tower 1 of the cable tower, which is used to lift the hoisting objects 17 outside the tower and assist in lifting the cantilever steel truss construction platform;

[0029] The cantilever steel truss construction platform forms a symmetrical structure on both sides of the middle part of the top of the cable tower main tower 1. The two ends of the cantilever steel truss construction platform are cantilevered to the outside of the cable tower main tower 1 and are respectively provided with a second pulley set 37 and a construction hanging basket 38.

[0030] A lightning rod 2 is installed in the middle of the main tower 1 of the cable tower, and a bottom hoop structure 3 is installed on the side end of the top of the main tower 1 of the cable tower. The bottom hoop structure 3 is connected to the bottom platform 4 of the safety protection enclosure. The four corners of the bottom platform 4 of the safety protection enclosure are installed with safety protection enclosure vertical connecting columns 5. The safety protection enclosure vertical connecting columns 5 are equipped with tower top lighting 9. The adjacent safety protection enclosure vertical connecting columns 5 are connected by three layers of safety protection enclosure horizontal connecting rods 6. Several safety protection enclosure vertical connecting columns are installed between the adjacent safety protection enclosure vertical connecting columns 5. A safety protection enclosure 8 is installed on the inside of the enclosure frame composed of a pole 7, a safety protection enclosure vertical connecting column 5, a safety protection enclosure horizontal connecting rod 6 and a safety protection enclosure vertical connecting rod 7. A closed canopy 10 is installed on the upper safety protection enclosure horizontal connecting rod 6. The safety protection enclosure 8 is larger than the tower top steel structure construction platform in terms of length, width and height. Closing the closed canopy 10 on rainy days can protect the tower top steel structure construction platform and staff. The closed canopy 10 is in a closed state on non-rainy days.

[0031] The first chemical bolt 11, the first hoist 12, the first hoist limiting groove 13, the steel temporary hanger 14, the first hoist lifting wire rope 15 and the first pulley block 16 are transported from the main tower 1 of the cable tower to the top of the main tower 1 of the cable tower, and the steel temporary hanger 14, the first hoist 12, the first hoist lifting wire rope 15 and the first pulley block 16 are installed on the top of the main tower 1 of the cable tower. The steel temporary hanger 14 is fixed to the top of the main tower 1 of the cable tower by embedding the first chemical bolt 11 reinforcement. The first hoist 12 is limited by the first hoist limiting groove 13. The temporary hoisting structure composed of the first chemical bolt 11, the first hoist 12, the first hoist limiting groove 13, the steel temporary hanger 14, the first hoist lifting wire rope 15 and the first pulley block 16 is used to hoist the hoisting object 17 outside the tower, and to assist in hoisting the cantilever steel truss construction platform.

[0032] Example 2

[0033] As another embodiment, embodiment two is proposed on the basis of embodiment one, a more specific tower top steel structure construction platform for repairing and reinforcing a multi-tower cable-stayed bridge:

[0034] The temporary hoisting structure includes a steel temporary hoisting frame 14, a first hoist 12, a first hoist hoisting steel wire rope 15, and a first pulley block 16. The steel temporary hoisting frame 14 is fixed to the top of the main tower 1 by the first chemical bolt 11 through the method of anchoring. The first hoist 12 is limited by the first hoist limiting groove 13. The top of the main tower 1 is provided with a welded base 19 and a stiffened plate 20 as a cantilever steel truss construction platform embedded part through the second chemical bolt 18. The cantilever steel truss construction platform forms a symmetrical structure on both sides of the middle part of the top of the main tower 1. The cantilever steel truss construction platform is welded and fixed on the base 19. The cantilever steel truss construction platform includes a second hoist 33, a second hoist limiting groove 34, a second hoist hoisting steel wire rope 39, a second pulley block 37, and a construction basket 38.

[0035] The hoisted object 17 outside the tower includes a second chemical bolt 18, a base 19, a stiffened plate 20, a cushion beam 21, a lower chord 22, an upper chord 23, an inclined web member 24, a vertical rod 25, a pin shaft 26, a lower cross beam 28, an upper cross beam 29, a second hoist 33, a second hoist limiting groove 34, a safety fence 35, a heavy bag water 36, a second pulley block 37, a construction basket 38, and a second hoist hoisting steel wire rope 39.

[0036] The cantilever steel truss construction platform includes a middle part, a left cantilever part, and a right cantilever part, which are obtained by three times of assembly construction. Specifically, the components that are hoisted above the main tower 1 but have not been used are pressed as counterweight members near the end of the cantilever steel truss construction platform during the segment-by-segment splicing, such as the first counterweight member 28 in Figure 6 or the second counterweight member 32 in Figure 8 .

[0037] It should be noted that the same or similar parts in this embodiment and embodiment one can be mutually referred to and will not be described again in this application.

[0038] The various embodiments in the 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 mutually referred to.

Claims

1. A construction platform for repairing and reinforcing the tower top steel structure of a multi-tower cable-stayed bridge, characterized in that: A bottom hoop structure is installed on the side end of the top of the main tower of the cable tower, and a safety protection enclosure bottom platform is supported on the bottom hoist structure; a temporary lifting structure is installed on the top of the main tower of the cable tower to lift objects outside the tower and assist in lifting the cantilever steel truss construction platform; The cantilever steel truss construction platform forms a symmetrical structure on both sides of the middle part of the top of the main tower of the cable tower. Both ends of the cantilever steel truss construction platform are cantilevered to the outside of the main tower of the cable tower and are respectively provided with a second pulley set and a construction basket.

2. The multi-tower cable-stayed bridge repair and reinforcement tower top steel structure construction platform according to claim 1 is characterized in that: A lightning rod is installed in the middle of the main tower of the cable tower, and vertical connecting columns of the safety protection enclosure are installed at the four corners of the bottom platform of the safety protection enclosure. The vertical connecting columns of the safety protection enclosure are equipped with tower top lighting lamps. The adjacent vertical connecting columns of the safety protection enclosure are connected by three layers of horizontal connecting rods of the safety protection enclosure. Several vertical connecting rods of the safety protection enclosure are installed between the adjacent vertical connecting columns of the safety protection enclosure. The vertical connecting columns of the safety protection enclosure, the horizontal connecting rods of the safety protection enclosure and the vertical connecting rods of the safety protection enclosure form the safety protection enclosure installed on the inside of the enclosure frame.

3. The construction platform for repairing and reinforcing the tower top steel structure of a multi-tower cable-stayed bridge according to claim 2 is characterized in that: A closed canopy is installed on the transverse connecting rod of the uppermost safety protection enclosure, and the length, width and height dimensions of the safety protection enclosure are all larger than the bottom platform of the safety protection enclosure.

4. The multi-tower cable-stayed bridge repair and reinforcement tower top steel structure construction platform according to claim 1 is characterized in that: The temporary lifting structure includes a temporary steel hanger, a first winch, a first winch lifting wire rope and a first pulley group. The temporary steel hanger is fixed to the top of the main tower of the cable tower by means of a first chemical bolt embedded reinforcement. The first winch is limited by a first winch limiting groove. The top of the main tower of the cable tower is provided with a welded base and a stiffening plate as embedded parts of the cantilever steel truss construction platform through a second chemical bolt; the cantilever steel truss construction platform forms a symmetrical structure on both sides of the middle part of the top of the main tower of the cable tower, and the cantilever steel truss construction platform is welded and fixed to the base; the cantilever steel truss construction platform includes a second winch, a second winch limiting groove, a second winch lifting wire rope, a second pulley group and a construction hanging basket.

5. The construction platform for repairing and reinforcing the tower top steel structure of a multi-tower cable-stayed bridge according to claim 1 is characterized in that: The hoisting objects outside the tower include: the second chemical bolt, base, stiffener, pad beam, lower chord, upper chord, diagonal web, vertical pole, pin bolt connection, lower cross beam, upper cross beam, second winch, second winch limit slot, safety net, weight bag water, second pulley block, construction hanging basket and second winch hoisting wire rope.

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