Bracket-free installation construction system for lower cross beam of cable bent tower

Abstract

The utility model provides a support-free installation construction system for a cable bent tower lower cross beam, and relates to the field of cable bent tower lower cross beam construction, the support-free installation construction system comprises a pre-assembly mechanism, a pull-up mechanism, a locking mechanism and an adjustable cross supporting rod, the pre-assembly mechanism comprises a box-shaped lower cross beam profile steel assembly, a steel reinforcement framework and a side formwork assembly, the pre-assembling mechanism completes assembling on the ground, the transverse supporting rod is fixedly arranged over the lower cross beam through hoisting equipment, the pulling-up mechanism is started, the pulling-up mechanism pulls the pre-assembling mechanism upwards to the set position, the pre-assembling mechanism is lifted up, the steel bar framework and the assembled side formwork assembly are assembled, and then the steel bar framework and the assembled side formwork assembly are assembled. And the pre-assembling mechanism is locked at a set position through the locking mechanism, so that bracket-free mounting construction of the cable bent tower lower cross beam is realized, the high-altitude operation amount is greatly reduced, the mounting construction efficiency and precision of the cable bent tower lower cross beam are improved, and the market popularization value is relatively high.

Description

Technical Field

[0001] The utility model relates to the field of construction of a lower crossbeam of a cable tower, in particular to a bracket-free installation construction system of the lower crossbeam of a cable tower. Background Art

[0002] There are many types of cable tower structures, which are mainly selected according to the layout requirements of the cables, the width of the bridge deck, the span of the main beam, etc. Common cable tower forms are arranged along the longitudinal direction of the bridge, including single column, A shape and inverted Y shape, and along the transverse direction of the bridge, including single column, double column, portal type, inclined leg portal type, inverted V shape, inverted Y shape, A shape, etc. The cross section of the cable tower can be a solid section according to the design requirements. When the cross-section size is large, an I-shaped or box-shaped section is used. It is more reasonable to use a box-shaped section for large-span cable-stayed bridges.

[0003] At present, the construction of the lower crossbeam of the portal tower mainly adopts the full-height scaffolding construction, but it is limited by the height of the lower crossbeam and the construction adjustment. Usually, this kind of construction is carried out on a large river or at sea, with a complex climate and environment, and difficult material transportation. Not only is the construction period long, but the risk is also high. Therefore, how to improve construction efficiency and reduce construction difficulty has become a problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a bracket-free installation construction system for the lower cross beam of a cable tower.

[0005] The utility model is realized through the following technical solutions:

[0006] A support-free installation construction system for a lower crossbeam of a cable tower comprises a preassembly mechanism, a lifting mechanism, a locking mechanism and an adjustable cross brace. The preassembly mechanism is assembled on the ground and comprises a box-shaped lower crossbeam steel component, a steel bar skeleton and a side formwork component. The lower crossbeam steel component holds up the steel bar skeleton and the assembled side formwork component. A lower formwork unit that abuts against the steel bar skeleton is provided at the inner bottom of the lower crossbeam steel component. The side formwork component is attached to the outer side and the inner side of the steel bar skeleton. The lifting mechanism hoists the preassembly mechanism to a set position of the lower crossbeam. The locking mechanism locks the preassembly mechanism at the set position. The cross brace is fixedly arranged directly above the lower crossbeam, and both ends of the cross brace are laterally against the inner side of the cable tower.

[0007] It can be seen that in the above technical solution, the staff hoisted the lower crossbeam steel assembly to the bottom of the cable tower, then installed the bottom formwork on the inner side of the lower crossbeam steel assembly, and then tied the steel frame on the bottom formwork, assembled and fixed the side formwork assembly, and used the hoisting equipment to fix the cross brace rod to the top of the lower crossbeam, started the lifting mechanism, and pulled the pre-assembly mechanism upward to the set position, and locked the pre-assembly mechanism in the set position through the locking mechanism, thereby realizing the bracket-free installation construction of the lower crossbeam of the cable tower, greatly reducing the amount of high-altitude operations and improving the installation construction efficiency of the lower crossbeam of the cable tower.

[0008] According to the above technical solution, preferably, the locking mechanism includes a fine-tuning component and a temporary locking component, the fine-tuning component fine-tunes the position of the preassembly mechanism up and down, and the temporary locking component locks the preassembly mechanism to a set position.

[0009] It can be seen that in the above technical solution, after the lifting mechanism pulls the pre-assembly mechanism upward to the set position, the fine-tuning component first fine-tunes the position of the pre-assembly mechanism up and down, and then locks the pre-assembly mechanism to the set position through the temporary locking component, thereby realizing the locking of the pre-assembly mechanism, which is convenient for subsequent construction operations.

[0010] According to the above technical solution, preferably, the fine-tuning assembly includes at least four groups of symmetrically arranged fine-tuning units, the fine-tuning units are arranged between the pre-assembly mechanism and the cross brace, the fine-tuning units include locking parts embedded in the tower column, jack tensioning reaction seats and steel strands, the jack tensioning reaction seats are arranged on the locking parts, and when the pre-assembly mechanism is hoisted into place, the jack tensioning reaction seats pull the pre-assembly mechanism to the set position through the steel strands.

[0011] It can be seen that in the above technical solution, when the lifting mechanism hoists the pre-assembly mechanism to the approximately set position, the jack tensioning reaction seat pulls the pre-assembly mechanism through the steel strands, thereby achieving fine-tuning of the pre-assembly mechanism, so that the lower crossbeam steel assembly and the steel skeleton are docked with the embedded components of the tower column with high precision.

[0012] According to the above technical solution, preferably, the temporary locking assembly includes an upper supporting corbel, a lower supporting corbel and multiple groups of locking units, the upper supporting corbel and the lower supporting corbel are respectively pre-buried in the tower column, and the upper supporting corbel and the lower supporting corbel are fixedly connected to the end of the lower crossbeam steel assembly through the locking units.

[0013] It can be seen that in the above technical solution, the upper supporting corbel and the lower supporting corbel are fixedly connected to the end of the lower crossbeam steel assembly through a locking unit, thereby achieving the locking of the lower crossbeam steel assembly.

[0014] According to the above technical solution, preferably, the lifting mechanism includes at least four groups of lifting components, the lifting components are arranged on the upper supporting bracket, the lifting components pull the lower crossbeam steel components through cables, and the lower crossbeam steel components drive the pre-assembly mechanism to move upward smoothly as a whole.

[0015] According to the above technical solution, preferably, the cross brace includes two groups of adjustable sleeve portions and a central adjustment rod, the sleeve portions are arranged on both sides of the central adjustment rod, the central adjustment rod is threadedly connected to one end of the sleeve portion, and the other end of the sleeve portion is detachably connected to the tower column.

[0016] It can be seen that in the above technical solution, by rotating the central adjustment rod, the length of the cross brace can be adjusted, thereby achieving fine-tuning of the tower column spacing, greatly improving the safety and stability of the lifting operation process.

[0017] According to the above technical solution, preferably, a corrugated pipe and prestressed steel bars placed in the corrugated pipe are buried in the steel bar skeleton.

[0018] It can be seen that in the above technical solution, when pouring concrete, the lower half of the concrete can be poured. After reaching a certain strength, prestressing operations can be carried out, which greatly reduces the bearing pressure of the lower crossbeam steel assembly.

[0019] The beneficial effects of the utility model are:

[0020] (1) The pre-assembly mechanism of the utility model is assembled on the ground, and the cross brace is fixedly set above the lower cross beam by using the lifting equipment, and the lifting mechanism is started, and the lifting mechanism pulls the pre-assembly mechanism upward to the set position, and the pre-assembly mechanism is locked in the set position by the locking mechanism, thereby realizing the bracket-free installation construction of the lower cross beam of the cable tower, greatly reducing the amount of high-altitude operations and improving the installation construction efficiency of the lower cross beam of the cable tower;

[0021] (2) When the lifting mechanism of the utility model hoists the pre-assembly mechanism to the approximately set position, the jack tensioning reaction seat pulls the pre-assembly mechanism through the steel strand, thereby achieving fine adjustment of the pre-assembly mechanism, so that the lower crossbeam steel assembly and the steel skeleton are docked with the embedded components of the tower column with high precision;

[0022] (3) The adjustable cross brace of the utility model can adjust the length of the cross brace by rotating the central adjustment rod, thereby achieving fine adjustment of the tower column spacing, greatly improving the safety and stability of the lifting operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The schematic diagram of the main structure of the pre-assembly mechanism in the utility model is shown, and the pre-assembly mechanism is assembled on the ground at this time;

[0024] Figure 2The front view of the utility model is shown, and the lifting mechanism is in the process of hoisting the pre-assembly mechanism;

[0025] Figure 3 Shows Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0026] Figure 4 Another schematic diagram of the front view of the present invention is shown, in which the fine-tuning assembly is fine-tuning the pre-assembly mechanism;

[0027] Figure 5 The schematic diagram of the main structure of the temporary locking assembly in the utility model is shown;

[0028] Description of reference numerals:

[0029] 1. Pre-assembly mechanism; 2. Lifting mechanism; 3. Locking mechanism; 4. Cross brace; 5. Lower crossbeam steel assembly; 6. Steel bar skeleton; 7. Side formwork assembly; 8. Fine-tuning assembly; 9. Temporary locking assembly; 10. Sleeve part; 11. Center adjustment rod; 12. Locking piece; 13. Jack tensioning reaction seat; 14. Steel strand; 15. Upper supporting bracket; 16. Lower supporting bracket; 17. Locking unit; 18. Lifting assembly; 19. Tower column. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0031] In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0032] like Figure 1-Figure 5As shown, the utility model provides a support-free installation construction system for the lower cross beam of a cable tower, including a preassembly mechanism 1, a lifting mechanism 2, a locking mechanism 3 and an adjustable cross brace 4, wherein the preassembly mechanism 1 is assembled on the ground, and the preassembly mechanism 1 includes a box-shaped lower cross beam steel component 5, a steel frame 6 and a side formwork component 7, the lower cross beam steel component 5 holds up the steel frame 6 and the assembled side formwork component 7, the inner bottom of the lower cross beam steel component 5 is paved with a lower formwork unit that resists the steel frame 6, the side formwork component 7 is attached to the outer side and the inner side of the steel frame 6, and the lifting mechanism 2 hoists the preassembly mechanism 1 to The locking mechanism 3 locks the preassembly mechanism 1 at the set position, wherein the locking mechanism 3 includes a fine-tuning component 8 and a temporary locking component 9. The fine-tuning component 8 fine-tunes the position of the preassembly mechanism 1 up and down, and the temporary locking component 9 locks the preassembly mechanism 1 to the set position. After the lifting mechanism 2 pulls the preassembly mechanism 1 upward to the set position, the fine-tuning component 8 first fine-tunes the position of the preassembly mechanism 1 up and down, and then locks the preassembly mechanism 1 to the set position through the temporary locking component 9, thereby realizing the locking of the preassembly mechanism 1, which is convenient for subsequent construction operations. The fine-tuning component 8 includes at least four groups of symmetrically arranged fine-tuning units. The fine-tuning unit is arranged between the pre-assembly mechanism 1 and the cross brace 4. The fine-tuning unit includes a locking piece 12 pre-buried in the tower column 19, a jack tensioning reaction seat 13 and a steel strand 14. The jack tensioning reaction seat 13 is arranged on the locking piece 12. When the pre-assembly mechanism 1 is hoisted in place, the jack tensioning reaction seat 13 pulls the pre-assembly mechanism 1 to the set position through the steel strand 14. When the lifting mechanism 2 hoists the pre-assembly mechanism 1 to the approximately set position, the jack tensioning reaction seat 13 pulls the pre-assembly mechanism 1 through the steel strand 14, thereby realizing the fine-tuning of the pre-assembly mechanism 1, so that the lower cross beam steel component 5 and the steel skeleton 6 are aligned with the tower column. The embedded components of 19 are docked with high precision, and the temporary locking assembly 9 includes an upper supporting corbel 15, a lower supporting corbel 16 and a plurality of locking units 17. The upper supporting corbel 15 and the lower supporting corbel 16 are respectively embedded in the tower column 19, and the upper supporting corbel 15 and the lower supporting corbel 16 are fixedly connected to the end of the lower crossbeam steel assembly 5 through the locking unit 17. The upper supporting corbel 15 and the lower supporting corbel 16 are fixedly connected to the end of the lower crossbeam steel assembly through the locking unit 17, thereby realizing the locking of the lower crossbeam steel assembly. The cross brace 4 is fixedly arranged directly above the lower crossbeam, and the two ends of the cross brace 4 are laterally against the inner side of the cable tower.

[0033] Working process:

[0034] The staff hoisted the lower crossbeam steel assembly 5 to the bottom of the cable tower, and then installed the bottom formwork on the inner side of the lower crossbeam steel assembly 5, and then tied the steel frame 6 on the bottom formwork, assembled and fixed the side formwork assembly 7, and used the hoisting equipment to fix the cross brace 4 to the top of the lower crossbeam, and started the lifting mechanism 2. The lifting mechanism 2 pulled the pre-assembly mechanism 1 upward to the set position, and locked the pre-assembly mechanism 1 in the set position through the locking mechanism 3, thereby realizing the bracket-free installation construction of the lower crossbeam of the cable tower.

[0035] Furthermore, the lifting mechanism 2 includes at least four groups of lifting components 18, which are arranged on the upper supporting bracket 15. The lifting components 18 pull the lower crossbeam steel component 5 through the cable, and the lower crossbeam steel component 5 drives the pre-assembly mechanism 1 to move upward smoothly as a whole.

[0036] Furthermore, the cross brace 4 includes two sets of adjustable sleeve portions 10 and a center adjustment rod 11. The sleeve portions 10 are arranged on both sides of the center adjustment rod 11. The center adjustment rod 11 is threadedly connected to one end of the sleeve portion 10, and the other end of the sleeve portion 10 is detachably connected to the tower column 19. By rotating the center adjustment rod 11, the length of the cross brace 4 can be adjusted, thereby achieving fine-tuning of the spacing between the tower columns 19, greatly improving the safety and stability of the lifting operation process.

[0037] Furthermore, a corrugated pipe and prestressed steel bars placed in the corrugated pipe are buried in the steel skeleton 6. When pouring concrete, the lower half of the concrete can be poured. After reaching a certain strength, prestressing operation can be carried out, which greatly reduces the bearing pressure of the lower crossbeam steel assembly 5.

[0038] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A bracket-free installation construction system for the lower crossbeam of a cable tower, characterized in that: It includes a preassembly mechanism, a lifting mechanism, a locking mechanism and an adjustable cross brace. The preassembly mechanism is assembled on the ground. The preassembly mechanism includes a box-type lower cross beam steel component, a steel bar skeleton and a side formwork component. The lower cross beam steel component holds up the steel bar skeleton and the assembled side formwork component. The inner bottom of the lower cross beam steel component is provided with a lower formwork unit that abuts against the steel bar skeleton. The side formwork component is attached to the outer side and the inner side of the steel bar skeleton. The lifting mechanism hoists the preassembly mechanism to the set position of the lower cross beam. The locking mechanism locks the preassembly mechanism in the set position. The cross brace is fixedly arranged directly above the lower cross beam, and the two ends of the cross brace are laterally against the inner side of the cable tower.

2. A bracket-free installation construction system for the lower cross beam of a cable tower according to claim 1, characterized in that: The locking mechanism comprises a fine-tuning component and a temporary locking component. The fine-tuning component fine-tunes the position of the preassembly mechanism up and down, and the temporary locking component locks the preassembly mechanism to a set position.

3. A bracket-free installation construction system for the lower cross beam of a cable tower according to claim 2, characterized in that: The fine-tuning assembly includes at least four groups of symmetrically arranged fine-tuning units, which are arranged between the pre-assembly mechanism and the cross brace. The fine-tuning unit includes a locking piece pre-buried in the tower column, a jack tensioning reaction seat and a steel strand, and the jack tensioning reaction seat is arranged on the locking piece. When the pre-assembly mechanism is hoisted into place, the jack tensioning reaction seat pulls the pre-assembly mechanism to the set position through the steel strand.

4. A bracket-free installation construction system for the lower cross beam of a cable tower according to claim 3, characterized in that: The temporary locking assembly includes an upper supporting corbel, a lower supporting corbel and a plurality of locking units. The upper supporting corbel and the lower supporting corbel are respectively pre-buried in the tower column. The upper supporting corbel and the lower supporting corbel are fixedly connected to the end of the lower crossbeam steel assembly through the locking units.

5. A bracket-free installation construction system for the lower cross beam of a cable tower according to claim 4, characterized in that: The lifting mechanism includes at least four groups of lifting components, which are arranged on the upper supporting brackets. The lifting components pull the lower crossbeam steel components through cables, and the lower crossbeam steel components drive the pre-assembly mechanism to move upward smoothly as a whole.

6. A bracket-free installation construction system for the lower cross beam of a cable tower according to any one of claims 3 to 5, characterized in that: The cross brace includes two groups of adjustable sleeve parts and a central adjustment rod. The sleeve parts are arranged on both sides of the central adjustment rod. The central adjustment rod is threadedly connected to one end of the sleeve part, and the other end of the sleeve part is detachably connected to the tower column.

7. The bracket-free installation construction system for the lower cross beam of a cable tower according to claim 1, characterized in that: A corrugated pipe and prestressed steel bars placed in the corrugated pipe are embedded in the steel bar skeleton.

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