Three-column lattice tower for integral lifting of arch bridge

Abstract

The utility model discloses a three-column lattice type tower for arch bridge integral lifting, its characterized in that, tower structure includes steel pipe stand, flat link and inclined support, flange joint and tower top I -steel distribution beam, lower end steel pipe stand is fixed on the basis, and the welding flat link and inclined support between steel pipe stand, and the butt joint through flange joint between upper and lower end steel pipe stand, and the steel pipe stand on top is provided with tower top I -steel distribution beam, and the upper portion fixed mounting jack's distribution beam of tower top I -steel distribution beam, the utility model has the following innovations: (1) three stand form triangle cross section, improve tower in-plane stability and overall stability, (2) reduce the dosage of stand, flat link and inclined support steel pipe, reduce material loss, save construction cost, (3) tower assembly construction, reduce construction time greatly.

Description

Technical Field

[0001] This utility model relates to the field of three-column lattice towers for the overall lifting of arch bridges, specifically to a three-column lattice tower for the overall lifting of arch bridges. Background Technology

[0002] In the field of bridge engineering construction, arch bridges, with their advantages of strong span capacity, rational structural stress, and beautiful appearance, are widely used in highway, railway, and municipal transportation construction. With the development of construction technology, the overall lifting construction process for arch bridges has become one of the mainstream solutions for constructing arch bridges with large spans or complex terrain conditions due to its ability to effectively reduce the risks of high-altitude operations and ensure consistent construction quality. In this process, the lifting tower, as the core load-bearing structure, directly undertakes the load transfer task of lifting equipment such as jacks. Its stability, load-bearing capacity, and construction economy play a decisive role in the safety, progress, and cost control of the entire project.

[0003] Currently, the lifting towers used in the overall lifting construction of arch bridges are generally four-column lattice structures. These towers primarily consist of four steel pipe columns as core load-bearing components. The columns are reinforced with horizontal bracing, vertical diagonal bracing, and transverse connecting members to achieve overall rigidity, ultimately forming a spatial truss structure with a square cross-section. While the four-column lattice tower structure can meet basic load-bearing requirements in long-term engineering practice, its inherent structural defects and application limitations are becoming increasingly prominent as engineering demands for construction efficiency and cost control continue to rise.

[0004] First, from the perspective of structural stability design, the geometric characteristics of a square cross-section inherently limit the in-plane stability of four-column lattice towers. To effectively control the in-plane deformation and instability risk of the tower under lifting loads, additional diagonal supports or rigid connectors are typically added diagonally to the four columns in engineering projects. While this improvement enhances structural stability, it significantly increases the number of tower components, leading to increased structural design complexity.

[0005] Secondly, material consumption and construction costs are significant issues. The four-column lattice tower structure requires four columns and corresponding horizontal and diagonal bracing components. The addition of diagonal supports further increases the amount of steel pipe used, raising not only steel procurement costs but also leading to increased losses during transportation and hoisting due to the increased number of components. Furthermore, the on-site connection of more components prolongs the construction period, indirectly increasing labor and machinery usage costs.

[0006] Finally, construction efficiency cannot meet the demands of rapid construction. Many components of traditional four-column lattice towers require on-site welding, which is difficult to control due to factors such as limited workspace, weather conditions, and the skill level of welders, resulting in slow construction progress. Although some projects have attempted to use prefabricated segmental assembly, the large number of components still leads to cumbersome segment connection procedures, making it difficult to significantly reduce the construction cycle.

[0007] In summary, traditional lifting towers are generally four-column lattice towers, with the four columns connected by horizontal and diagonal braces, resulting in a large amount of material consumption. At the same time, the cross-section formed by the four columns is square, and in order to reduce the risk of in-plane instability, it is necessary to add connections between the diagonal columns, further increasing material consumption.

[0008] Based on the shortcomings of the existing technology, there is an urgent need for an arch bridge lifting tower structure that can reduce material consumption, simplify construction process, and improve construction efficiency while ensuring structural stability and load-bearing capacity, so as to meet the development needs of modern arch bridge construction for safety, reliability, economy and efficiency. This is also the core starting point of the research and development of this invention. Utility Model Content

[0009] Therefore, in order to solve the above-mentioned shortcomings, this utility model provides a three-column lattice tower for the overall lifting of arch bridges. It mainly solves the following problems: (1) the columns form a triangular cross section, which improves the overall stability of the tower; (2) the amount of columns, flat braces and diagonal braces used is reduced, saving costs; (3) the prefabrication construction method is adopted, and the standard tower segments are prefabricated in advance, which greatly reduces the construction time.

[0010] This utility model is implemented as follows: a three-column lattice tower for the overall lifting of an arch bridge is constructed, characterized in that: the tower structure includes steel pipe columns (1), horizontal bracing and diagonal bracing (2), flange joints (3) and tower top I-beam distribution beams (4); the lower steel pipe columns (1) are fixed on the foundation, horizontal bracing and diagonal bracing (2) are welded between the steel pipe columns (1), the upper and lower steel pipe columns (1) are connected by flange joints (3), the tower top I-beam distribution beams (4) are set on the top steel pipe columns (1), and the distribution beams (6) of jacks (5) are fixedly installed on the upper part of the tower top I-beam distribution beams (4).

[0011] According to the present invention, a three-column lattice tower for overall lifting of an arch bridge is characterized in that: the steel pipe column (1) is composed of three columns, which form a triangular cross section to improve the in-plane stability and overall stability of the tower.

[0012] This utility model has the following advantages: This utility model provides a three-column lattice tower for the overall lifting of arch bridges. It mainly solves the following problems: (1) The columns form a triangular cross section, which improves the overall stability of the tower; (2) It reduces the amount of columns, horizontal braces and diagonal braces used, saving costs; (3) It adopts prefabricated construction and prefabricates standard tower segments in advance, which greatly reduces construction time. At the same time, the advantages are reflected in: (1) The three columns form a triangular cross section, which improves the in-plane stability and overall stability of the tower; (2) It reduces the amount of steel pipes for columns, horizontal braces and diagonal braces used, reduces material loss and saves construction costs; (3) The tower is prefabricated, which greatly reduces construction time. Attached Figure Description

[0013] Figure 1 This is a top view of the tower frame of this patent;

[0014] Figure 2 This is a front view of the tower in this patent;

[0015] Figure 3 This is a side view of the tower in this patent. Detailed Implementation

[0016] The following will be combined with the appendix Figures 1-3 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0017] This utility model provides an improved three-column lattice tower for the overall lifting of arch bridges, such as... Figures 1-3 As shown, it can be implemented in the following manner; the structure of this patent mainly includes steel pipe columns 1, horizontal bracing and diagonal bracing 2, flange joints 3, and I-beam distribution beams 4 at the top of the tower. The operation process is as follows: First, the steel pipe columns 1, horizontal bracing, diagonal bracing, and flange joints are welded and connected in advance at the processing plant to prefabricate the standard tower sections; then, the embedded parts are installed on the construction site, and the foundation concrete is poured; next, the standard tower sections are hoisted, and the flanges are connected between the sections using high-strength bolts; finally, the distribution beams are hoisted, and lifting equipment such as jacks are installed on them.

[0018] The lower steel pipe column 1 is fixed on the foundation. The steel pipe columns 1 are welded together with horizontal bracing and diagonal bracing 2. The upper and lower steel pipe columns 1 are connected by flange joints 3. The top steel pipe column 1 is equipped with a tower top I-beam distribution beam 4. The distribution beam 6 of the jack 5 is fixedly installed on the upper part of the tower top I-beam distribution beam 4.

[0019] This patent has the following advantages: (1) The three columns form a triangular cross section, which improves the in-plane stability and overall stability of the tower; (2) It reduces the amount of steel pipes used for columns, horizontal bracing and diagonal bracing, reduces material consumption and saves construction costs; (3) The tower is assembled and constructed, which greatly reduces the construction time.

[0020] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A three-column lattice tower for the overall lifting of an arch bridge, characterized in that; The tower structure includes steel pipe columns (1), horizontal bracing and diagonal bracing (2), flange joints (3) and tower top I-beam distribution beams (4); the lower steel pipe columns (1) are fixed on the foundation, horizontal bracing and diagonal bracing (2) are welded between the steel pipe columns (1), and the upper and lower steel pipe columns (1) are connected by flange joints (3). The tower top I-beam distribution beams (4) are set on the top steel pipe columns (1), and the distribution beams (6) of jacks (5) are fixedly installed on the upper part of the tower top I-beam distribution beams (4).

2. The three-column lattice tower for overall lifting of an arch bridge according to claim 1, characterized in that; The steel pipe column (1) adopts a combination of three steel pipe columns, which form a triangular cross section to improve the in-plane stability and overall stability of the tower.

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