Support for construction of ultrahigh and ultra-wide upper cross beam of cable bent tower

Abstract

The utility model discloses a support for construction of an ultrahigh and ultra-wide upper cross beam of a cable bent tower. The support comprises load-bearing shear boots symmetrically arranged on the side wall of a tower column of the cable bent tower. Supporting steel cushion blocks are arranged on the bearing shear boots to respectively support the two pipe truss sheets; supporting corbels are arranged on the tower columns close to the ends of the cross beams, and unloading sand boxes are arranged on the tops of the pipe trusses and the corbels; a main bearing beam is arranged on the unloading sand box, a combined structure is arranged on the main bearing beam in the transverse bridge direction, and a bottom die system is arranged on the combined structure. The structure stress system is optimized, the self weight of the support system is reduced, the construction cost is reduced, and mounting and dismounting are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge cable tower construction, and more specifically to a bracket used for the construction of an ultra-high and ultra-wide upper crossbeam of a cable tower. Background Art

[0002] With the development of social economy and the improvement of bridge construction, the construction of large-scale suspension bridges and cable-stayed bridges such as highway-railway bridges, highway-urban road bridges, and two-way eight-lane bridges is increasing. For portal towers or H-type cable towers, an ultra-wide bridge deck will result in an ultra-wide lower beam and upper beam structure, and the increase in construction volume will increase the difficulty of construction technology.

[0003] The portal tower or H-type cable tower is a double-limb structure, with an upper beam and a lower beam set between the two tower columns. The lower beam of the cable tower is generally supported by a ground-mounted steel pipe pile support, which is supported on the ground. However, for the construction of the upper beam of the super-high cable tower, if the ground-mounted support is used, the support height is high, the construction cost is high, the construction difficulty is high, and the safety risk is high. Due to the large span of the beam, in order to support the beam load during construction, if the traditional bracket bracket is used, the number of bracket brackets will increase, the deadweight of the bracket system is large, the installation and disassembly construction is relatively difficult, and the safety risk increases. Summary of the invention

[0004] The utility model aims to provide a bracket for the construction of super-high and super-wide upper crossbeams of cable towers, which optimizes the structural force system, reduces the deadweight of the bracket system, reduces the construction cost, and facilitates installation and disassembly.

[0005] The technical solution adopted by the utility model to solve this technical problem is: a bracket for the construction of the super-high and super-wide upper beam of the cable tower, which adopts a tower tube truss structure supported on the tower columns on both sides to cooperate with the construction of the upper beam. It includes:

[0006] Two groups (4 in total) of load-bearing shear boots are symmetrically arranged on the side walls of the tower column; supporting steel pads are arranged on each load-bearing shear boot to support two tube truss pieces respectively; supporting corbels are arranged on the tower column near the end of the beam, and unloading sand boxes are arranged on the top and corbels of the tube truss piece to facilitate the later unloading of the load and dismantling of the beam support system; the main load-bearing beam is arranged on the unloading sand box, and a composite structure is arranged on the main load-bearing beam along the transverse direction of the bridge, and a bottom formwork system is arranged on the composite structure, and the entire construction support system is used to support the upper beam.

[0007] As a further solution of the utility model, a connection system is provided between two tube truss sheets to increase the stability of the two groups of tube truss sheets, and the tube truss sheets are anchored on the tower column by pre-embedded climbing cones.

[0008] As a further solution of the utility model, the supporting corbel is installed on the tower column through pre-buried anchor bars and anchor steel plates.

[0009] As a further solution of the utility model, reinforcing mesh bars are arranged under the load-bearing shear boots, and the reinforcing mesh bars are pre-buried in the tower column to prevent the shear boots from damaging the tower column components.

[0010] As a further solution of the utility model, the bottom mold system includes a distribution beam, wooden planks and a template.

[0011] As a further solution of the utility model, the combined structure is constructed by Bailey beams and special-shaped steel truss pieces.

[0012] The utility model includes at least the following beneficial effects: the support applied for the construction of super-high and super-wide upper crossbeams of cable towers solves the problem that the support system is heavy due to the super-high and super-wide upper crossbeams and the lifting performance of the tower crane for cable tower construction is not enough for the whole lifting, thereby saving construction costs.

[0013] The support structure at the bottom of the bracket adopts the form of load-bearing shear boots; the support frame system structure has clear force and can bear the crossbeam construction load; the two tube truss pieces are connected by a connection system, which greatly increases the stability; the components between the tube truss pieces are connected by flanges, which can be pre-assembled under the tower and then installed in groups at high altitudes in combination with the weight range of the tower crane. The combined structure of Bailey beams and special-shaped steel truss pieces meets the requirements of crossbeam load support and modeling.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view structural schematic diagram of the present invention;

[0016] Figure 2 It is a side structural schematic diagram of the present invention;

[0017] Figure 3 It is a schematic diagram of the arrangement of the embedded parts of the cable tower side wall of the present invention;

[0018] Figure 4 It is a schematic diagram of the bottom structure of the tube truss sheet of the present invention;

[0019] Figure 5 It is a schematic diagram of the structure of the load-bearing shear boot of the present invention;

[0020] Figure 6 It is a flow chart of the erection method of the present invention.

[0021] Among them, 1 reinforcing mesh reinforcement, 2 load-bearing shear boots, 21 precision-rolled threaded steel bars, 3 supporting steel pads, 4 pipe truss plates, 41 connection systems, 42 embedded climbing cones, 5 supporting corbels, 51 embedded anchor bars, 52 anchor steel plates, 6 unloading sand boxes, 7 main load-bearing beams, 8 combined structures, 9 bottom formwork systems, 91 distribution beams, 92 wooden squares, 93 formworks, 10 tower columns, and 11 upper crossbeams. DETAILED DESCRIPTION

[0022] The utility model is described in detail and completely below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the utility model based on these descriptions. Before describing the utility model in conjunction with the accompanying drawings, it should be particularly pointed out that the technical solutions and technical features provided in each part of the utility model, including the following description, can be combined with each other without conflict.

[0023] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] The following is a further detailed description of the utility model in conjunction with the accompanying drawings and implementations, and its specific implementation process is as follows:

[0025] like Figures 1 to 6 As shown, the utility model provides an ultra-high and ultra-wide upper crossbeam construction support, which adopts a tower tube truss structure supported on tower columns on both sides to cooperate with the upper crossbeam construction. It includes two groups (a total of 4) of load-bearing shear boots 2 arranged on the side walls of the cable tower column 10; a supporting steel pad 3 is arranged on each load-bearing shear boot 2 to respectively support two tube truss sheets 4; a connecting system 41 is arranged between the two tube truss sheets to increase the stability of the two groups of tube truss sheets, and they are anchored on the tower column 10 through pre-embedded climbing cones 42; a supporting corbel 5 is arranged at the end of the beam, which is installed on the tower column 10 through pre-embedded anchor bars 51 and anchoring steel plates 52, and a unloading sand box 6 is arranged on the top of the tube truss sheet 4 and the corbel 5, so as to facilitate the later unloading of the load and dismantling of the beam support system; a main load-bearing beam 7 is arranged on the unloading sand box 6, and a Bailey beam and a special-shaped steel truss sheet composite structure 8 is arranged on the main load-bearing beam along the transverse bridge direction, and a bottom mold system 9 composed of a bottom mold distribution beam 91, a wooden square 92, and a template 93 is arranged in sequence on the composite structure 8, and the entire construction support system is used to support the upper beam 11.

[0026] In this embodiment, the load-bearing shear boot 2 and the bracket 5 are made of t=20mm and t=16mm steel plates. The pipe truss piece 4 is made of Φ1000×10mm, Φ630×8mm, and Φ426×6mm steel pipes. The connection system 41 is made of Φ426×6mm steel pipe and No. 25 channel steel. The main load-bearing beam 7 is made of HN700×300mm steel. The special-shaped steel truss piece in the combined structure 8 is made of No. 10 channel steel. The bottom mold distribution beam 91 is made of No. 14 I-beam, the wooden square 92 is made of 100×100mm, and the template 93 is made of t=18mm plywood.

[0027] like Figure 1 As shown, a reinforcing mesh bar 1 is arranged under the load-bearing shear shoe 2 and is pre-buried in advance when constructing the tower column 10 to prevent the shear shoe 2 from damaging the tower column components;

[0028] like Figure 1 As shown, a supporting steel pad 3 is provided between the load-bearing shear boot 2 and the tube truss sheet 4 to adjust the elevation and avoid construction errors;

[0029] like Figure 1 , Figure 2 As shown, the entire beam load passes through the bottom formwork system, transferring the load evenly to the entire support system.

[0030] like Figure 3 As shown, the arrangement positions of the load-bearing shear boots 2, the tube truss pieces 4 and the supporting corbels 5 on the tower column 10;

[0031] like Figure 4 As shown, it is a schematic diagram of the structure of the connection system 41. The connection system is respectively connected to the bottom, top and middle of the two tube truss pieces. The structure is staggered inside to form a scissor brace, which greatly increases the stability of the structural system.

[0032] like Figure 5 As shown, it is a shear shoe structure sample, and a circular hole is provided for passing the precision-rolled threaded steel bar 21 through and anchoring it to the tower column 10.

[0033] like Figure 6 As shown, the method for erecting the upper crossbeam support of the present invention comprises the following steps:

[0034] 1) During the construction of the tower column, the upper crossbeam support is processed in the area below the tower.

[0035] 2) During the construction of the cable tower column, the upper crossbeam bracket embedded parts and the bracket installation platform embedded parts are embedded.

[0036] 3) After the hydraulic climbing formwork is raised to expose the embedded parts of the support, install the construction platform, and install the shear boots of the upper beam support and the pipe truss support steel.

[0037] 4) Pre-assemble the processed pipe truss segments under the tower and install a personnel operating platform at the joint position.

[0038] 5) Use a tower crane to install the pipe truss segments in 4 sections and connect them with flanges at high altitude.

[0039] 6) Install the connection system between the tube truss pieces to make the two tube truss pieces a stable whole.

[0040] 7) Install the unloading sand box.

[0041] 8) Install the main load-bearing beam.

[0042] 9) Install the combined structure of Bailey beam and special-shaped steel truss.

[0043] 10) Install the bottom formwork system, and then install the distribution beam, wooden beams, and plywood in sequence.

[0044] 11) Construct the upper beam.

[0045] The upper crossbeam support erection method divides the pipe truss piece into four sections for combined installation and adopts flanges for high-altitude docking, which effectively ensures the installation quality of the pipe truss piece and effectively solves the problem that the support system is heavy due to the ultra-high and ultra-wide upper crossbeam and the lifting performance of the tower crane in cable tower construction is not enough to lift the whole piece, thus saving construction costs.

[0046] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A bracket for the construction of super-high and super-wide upper beams of cable towers, characterized in that: include: The load-bearing shear boots are symmetrically arranged on the side walls of the cable tower column; the load-bearing shear boots are provided with supporting steel pads to support two tube truss pieces respectively; the tower column is provided with supporting corbels near the end of the cross beam, and unloading sand boxes are provided on the top and the corbels of the tube truss piece; the unloading sand box is provided with a main load-bearing beam, a composite structure is provided on the main load-bearing beam along the transverse direction of the bridge, and a bottom formwork system is provided on the composite structure.

2. The support for the construction of the super-high and super-wide upper beam of the cable tower according to claim 1 is characterized in that: A connection system is provided between the two tube truss pieces, and the tube truss pieces are anchored on the tower column through pre-embedded climbing cones.

3. The support for the construction of the super-high and super-wide upper beam of the cable tower according to claim 1, characterized in that: The supporting corbel is installed on the tower column through pre-embedded anchor bars and anchor steel plates.

4. The support for the construction of the super-high and super-wide upper beam of the cable tower as claimed in claim 1 is characterized in that: Reinforcement mesh bars are arranged under the load-bearing shear boots and are embedded in the tower column.

5. The support for the construction of super-high and super-wide upper beams of cable towers as claimed in claim 1, characterized in that: The bottom formwork system comprises distribution beams, wooden planks and formwork.

6. The support for the construction of super-high and super-wide upper beams of cable towers as claimed in claim 1, characterized in that: The combined structure is composed of Bailey beams and special-shaped steel truss pieces.

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