External expansion type main tower construction opposite-pulling device

Abstract

The utility model relates to an external expansion type main tower construction opposite-pulling device which is used on an upper tower column of a V-shaped main tower and comprises a plurality of opposite-pulling components which are sequentially arranged in the vertical direction, and each opposite-pulling component comprises I-shaped steel and a plurality of steel strand assemblies located above the I-shaped steel. The two opposite ends of the I-shaped steel are fixed to the two opposite faces of the upper tower column respectively, each steel strand assembly is composed of a plurality of steel strands, and the two opposite ends of each steel strand are fixed to the two opposite faces of the upper tower column respectively. According to the external expansion type main tower construction opposite-pulling device, the line shape of a tower column can be effectively adjusted through opposite-pulling of the steel strands and the I-shaped steel, and compared with pure steel strand opposite-pulling, graded tensioning is not needed, and elastic deformation of the steel strands caused by increase of horizontal component force of a support in the pouring process of an upper cross beam can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a tensioning device for the construction of an outward-stretching main tower. Background Technology

[0002] In the construction of tall structures, the stability of the main tower directly affects the safety of the overall structure. Currently, suspension bridge main towers typically employ a V-shaped structure. During construction, the tower columns experience significant outward tilting forces due to their own weight and construction loads, leading to elastic deformation and potentially cracks at the base, thus impacting the structure's stability and safety. Therefore, during construction, it is necessary to use tie rods to fix the tower columns at both ends to counteract the outward tilting forces, reduce deformation, and improve construction safety.

[0003] Traditional tensioning methods mainly include two approaches: large steel pipe tensioning and simple steel strand tensioning. While large steel pipes possess strong compressive and tensile strength, their bending resistance is poor under bending moments or lateral forces, making them prone to local instability or deformation. Steel strands, on the other hand, have high tensile strength and can provide reliable tensile support within a certain range. However, their high tensile strength makes them susceptible to elongation and deformation under excessive stress, potentially leading to changes in the tower's position or structural instability. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an externally tensioned main tower construction tie rod device to solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An externally tensioned main tower construction tie rod device, used on the upper tower column of a V-shaped main tower, comprising:

[0007] Multiple sets of tie rods are arranged sequentially in the vertical direction. Each tie rod includes an I-beam and multiple sets of steel strand assemblies located above the I-beam. The opposite ends of the I-beam are respectively fixed to the two opposite surfaces of the upper tower column. Each set of steel strand assemblies consists of multiple steel strands, and the opposite ends of the steel strands are respectively fixed to the two opposite surfaces of the upper tower column.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. By using steel strands and I-beams for tensioning, the shape of the tower column can be effectively adjusted. Compared with simple steel strand tensioning, there is no need for staged tensioning, which can effectively reduce the elastic deformation of the steel strands caused by the increase of the horizontal component force of the support during the pouring of the upper crossbeam.

[0010] Furthermore, it also includes embedded parts, with the opposite ends of the I-beam respectively fixedly connected to two embedded parts, which are embedded in the two opposite surfaces of the upper tower column.

[0011] Furthermore, the embedded part includes a steel section with steel plates at both ends and a stiffening plate disposed on the steel plate and the steel section, and the I-beam is fixedly connected to the steel plate.

[0012] Furthermore, the steel strand assembly is provided with a metal corrugated pipe.

[0013] Furthermore, a U-shaped bracket is fixedly provided on the I-beam, and the metal corrugated pipe can be placed in the U-shaped groove of the U-shaped bracket.

[0014] Furthermore, it also includes an anchor plate and an anchor provided on the anchor plate. The opposite ends of the steel strand are respectively connected to the two anchors and clamped to the anchors by the clamps on the anchors. The anchor plate is provided on two opposite surfaces of the upper tower column.

[0015] Furthermore, the clamping plate is also provided with an anti-loosening pressure plate, the anti-loosening pressure plate is provided with bolt holes, the anchor plate is provided with mounting holes, the bolt holes are connected to the mounting holes, and are used for fasteners to pass through and lock.

[0016] Furthermore, the tie members are configured in two sets; wherein, the tie member located above is located at the upper crossbeam support bracket of the upper tower column; the steel strand assembly of the tie member located below is configured in two sets, and the two sets of steel strand assemblies are arranged sequentially in the left-right direction.

[0017] Furthermore, a bracing steel pipe is installed inside the upper tower column, and the bracing steel pipe is located at the upper crossbeam support bracket of the upper tower column.

[0018] Furthermore, it also includes a construction platform, which is disposed on two opposite surfaces of the upper tower column and located below the steel strand assembly. Attached Figure Description

[0019] Appendix Figure 1 : A schematic diagram of the tie rod device for the construction of the externally tensioned main tower in this embodiment;

[0020] Appendix Figure 2 : A schematic diagram of the tie rod structure in the tie rod device for the externally oriented main tower construction in this embodiment;

[0021] Appendix Figure 3 This is a partially enlarged schematic diagram of the embedded parts in the tie rod device for the externally tensioned main tower construction in this embodiment.

[0022] Appendix Figure 4 : Cross-sectional view of the I-beam in the tie rod device for the externally tensioned main tower construction in this embodiment;

[0023] Appendix Figure 5 This embodiment is a schematic diagram of the installation of anchor plates for the steel strand assembly in the tie rod device for the construction of the externally oriented main tower.

[0024] Appendix Figure 6 This is a schematic diagram of the anchorage in the tie rod device for the externally tensioned main tower construction in this embodiment.

[0025] Appendix Figure 7 : A schematic diagram of the anti-loosening pressure plate in the tie rod device for the externally tensioned main tower construction in this embodiment;

[0026] Appendix Figure 8 This embodiment presents a partial structural schematic diagram of the tie rod device for the construction of the externally oriented main tower.

[0027] Explanation of icon numbers:

[0028] 10. Tension members;

[0029] 20. I-beams; 21. U-shaped brackets;

[0030] 30. Steel strand assembly; 31. Metal corrugated pipe;

[0031] 40. Embedded parts; 41. Structural steel; 42. Steel plate; 43. Stiffening plate;

[0032] 50. Anchor plate; 51. Mounting hole;

[0033] 60. Anchorage; 61. Wedge;

[0034] 70. Anti-loosening pressure plate; 71. Bolt holes;

[0035] 80. Construction platform;

[0036] 90. V-shaped main tower; 91. Upper tower column; 92. Upper crossbeam support bracket; 93. Supporting steel pipe.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0039] In the description of this utility model, it should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0040] like Figures 1-8 As shown in the figure, this utility model embodiment proposes an externally oriented main tower construction tie rod device for use on the upper tower column 91 of a V-shaped main tower 90. It includes multiple sets of tie rod members 10 arranged sequentially in the vertical direction. Each tie rod member 10 includes an I-beam 20 and multiple sets of steel strand assemblies 30 located above the I-beam 20. The opposite ends of the I-beam 20 are respectively fixed to the two opposite surfaces of the upper tower column 91. Each set of steel strand assemblies 30 is composed of multiple steel strands, and the opposite ends of the steel strands are respectively fixed to the two opposite surfaces of the upper tower column 91.

[0041] In this embodiment of the invention, the combination of steel strand tensioning and I-beam 20 provides stronger bending resistance and the ability to withstand greater bending moments and lateral loads compared to the traditional method of tensioning with large steel pipes. Furthermore, during construction, the upper tower column 91 of the V-shaped main tower 90 experiences outward tilting forces due to its own weight and construction loads, potentially leading to structural deformation or even root cracking. This invention addresses this by using the combination of I-beam 20 and steel strand assembly 30 to tension and fix the upper tower column 91, effectively counteracting the outward tilting forces, reducing deformation, and improving construction safety.

[0042] Based on the above solutions, such as Figure 3 As shown in this embodiment of the utility model, embedded parts 40 are also pre-embedded on the two opposite surfaces of the upper tower column 91. The opposite ends of the I-beam 20 are respectively fixedly connected to the two embedded parts 40, so that the embedded parts 40 serve as anchoring structures pre-installed in the upper tower column 91. The I-beam 20 can be directly connected and fixed to the embedded parts 40 during construction, effectively reducing the amount of on-site adjustment work and speeding up the construction progress.

[0043] Specifically, such as Figures 3-4As shown, in this embodiment, the embedded part 40 includes a steel section 41 with steel plates 42 at both ends and a stiffening plate 43 disposed on the steel plates 42 and the steel section 41. The I-beam 20 is fixedly connected to the steel plates 42. By setting steel plates 42 at both ends of the steel section 41 and strengthening the structure with stiffening plates 43, the overall shear, tensile, and bending resistance of the embedded part 40 is improved, and the interlocking force between the embedded part 40 and the concrete structure of the upper tower column 91 is enhanced, thereby improving the anchoring effect and preventing the embedded part from loosening or shifting during construction. The I-beam 20 is directly fixedly connected to the steel plates 42 on the embedded part 40 (by bolts or welding), providing reliable rigid support and thus improving the stability of the overall tensioning device. Furthermore, a reinforcing plate can be installed after the I-beam 20 is connected to the steel plates 42 to further improve the structural stability.

[0044] Based on the above solutions, such as Figure 2 As shown in this embodiment of the invention, the steel strand assembly 30 is provided with a metal corrugated pipe 31. The metal corrugated pipe 31 protects the steel strand, effectively reducing corrosion and weld slag burn, ensuring long-term performance, and improving the overall durability of the structure. Furthermore, a U-shaped bracket 21 is fixedly provided on the I-beam 20. The metal corrugated pipe 31 can be placed in the U-shaped groove of the U-shaped bracket 21. Specifically, after the corrugated pipe 31 is threaded through the steel strand assembly 30 on the ground, it can be placed in the U-shaped groove of the U-shaped bracket 21 on the I-beam 20 for overall hoisting, improving installation efficiency.

[0045] Based on the above solutions, such as Figures 5-7 As shown, in this embodiment of the utility model, it also includes an anchor plate 50 and an anchor 60 disposed on the anchor plate 50. The two opposite ends of the steel strand are respectively connected to the two anchors 60 and clamped to the anchors 60 by the clamps 61 on the anchors 60. The anchor plate 50 is disposed on two opposite surfaces of the upper tower column 91. Using the anchor plate 50 as a fixed base can provide a larger force-bearing area, improve the anchoring force of the steel strand, ensure long-term stress stability, and form a firm connection between the steel strand and the anchor plate 50 through the anchors 60, so that the tensile force can be stably and evenly transmitted to the upper tower column 91, thereby effectively offsetting the outward tilting force and preventing the upper tower column 91 from deforming or cracking due to uneven stress.

[0046] Secondly, since the tensioning device needs to be under continuous stress for a long period of time, the clamping plates 61 on the anchor 60 may loosen due to long-term tension, leading to tension failure. An anti-loosening pressure plate 70 is also provided on the clamping plates 61. The anti-loosening pressure plate 70 has bolt holes 71, and the anchor plate 50 has mounting holes 51. The bolt holes 71 are connected to the mounting holes 51 for fasteners to pass through and lock. By adding the anti-loosening pressure plate 70 and using bolt fixing, an additional locking constraint can be formed on the clamping plates 61, ensuring that the steel strand remains stable for a long time and effectively preventing the clamping plates 61 from loosening due to vibration, fatigue, or temperature changes.

[0047] Specifically, such as Figure 1 and 8 As shown, in one embodiment of this utility model, the tie members 10 are configured in two sets. The upper tie member 10 is located at the upper crossbeam support bracket 92 of the upper tower column 91. Due to the external tension of the crossbeam support at the upper crossbeam support bracket 92, the tower column at this location is prone to significant outward tilting force. By configuring the tie member 10 here in conjunction with the I-beam 20, the outward tilting force can be effectively counteracted, reducing the elastic deformation of the upper tower column 91 and improving the overall structural stability. The lower tie member 10 has two sets of steel strand assemblies 30, arranged sequentially in the left-right direction. This left-right arrangement of the steel strand assemblies 30 creates stronger horizontal constraints, reducing the risk of cracks caused by uneven stress and enhancing the torsional resistance of the entire main tower.

[0048] The second tie rod 10 at the top fully considers the construction load of the upper crossbeam. As the crossbeam concrete is poured, the horizontal component of the support will gradually increase. When only steel strands are used for tie rods, the steel strands need to be tensioned in stages to overcome elastic deformation. This is not easy to operate in actual construction, and the theoretical value differs from the actual situation, which can easily lead to excessive or insufficient tie force. That is, if the tie force is too large, the support will arch upward; if the tie force is too small, the tower column and steel strands will shift outward due to elastic deformation. Both will affect the safety of the support and easily cause cracks in the crossbeam concrete. Therefore, when constructing this section, I45 I-beams are used in conjunction with steel strand assemblies 30 for tie rods. They have strong tensile strength, do not require staged tensioning, and hardly produce elastic deformation during concrete pouring. They are also lightweight and easy to install. The first tie rod 10 at the bottom only uses steel strand assemblies 30 for tie rods. Here, the I-beam 20 only serves to assist in the installation of steel strand assemblies 30 and is not fixedly connected to the upper tower column 91.

[0049] Based on the above solutions, such as Figure 8As shown, in this embodiment, a bracing steel pipe 93 is provided inside the upper tower column 91. The bracing steel pipe 93 is located at the upper crossbeam support bracket 92 of the upper tower column 91. The addition of the bracing steel pipe 93 inside the upper tower column 91 at this location can form an inner rigid support. Together with the outer tie member 10, it can effectively resist the elastic deformation of the upper tower column 91 caused by the outward tilting force, so that the tower column remains stable under construction and load.

[0050] Specifically, such as Figure 1 As shown, in this embodiment of the utility model, a construction platform 80 is also included. The construction platform 80 is arranged on two opposite surfaces of the upper tower column 91 and located below the steel strand assembly 30. Workers can directly stand on the construction platform 80 to carry out the installation of the tie rod 10, avoiding the need for workers to operate in the air in the traditional way, and improving the installation accuracy and construction efficiency.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tensioning device for an outward-stretching main tower, used on the upper tower column (91) of a V-shaped main tower (90), characterized in that, include: Multiple sets of tie rods (10) are arranged sequentially in the vertical direction. Each tie rod (10) includes an I-beam (20) and multiple sets of steel strand assemblies (30) located above the I-beam (20). The opposite ends of the I-beam (20) are respectively fixed on the two opposite surfaces of the upper tower column (91). Each set of steel strand assemblies (30) is composed of multiple steel strands. The opposite ends of the steel strands are respectively fixed on the two opposite surfaces of the upper tower column (91).

2. The tensioning device for an externally oriented main tower construction according to claim 1, characterized in that, It also includes embedded parts (40), with the two opposite ends of the I-beam (20) respectively fixedly connected to the two embedded parts (40), which are embedded on the two opposite surfaces of the upper tower column (91).

3. The tensioning device for an externally oriented main tower construction according to claim 2, characterized in that, The embedded part (40) includes a steel section (41) with steel plates (42) at both ends and a stiffening plate (43) provided on the steel plate (42) and the steel section (41), and the I-beam (20) is fixedly connected to the steel plate (42).

4. The tensioning device for an externally oriented main tower construction according to claim 1, characterized in that, The steel strand assembly (30) is provided with a metal corrugated pipe (31).

5. The tensioning device for an externally oriented main tower construction according to claim 4, characterized in that, A U-shaped bracket (21) is fixedly provided on the I-beam (20), and the metal corrugated pipe (31) can be placed in the U-shaped groove of the U-shaped bracket (21).

6. A tensioning device for the construction of an externally oriented main tower according to any one of claims 1-3, characterized in that, It also includes an anchor plate (50) and an anchor (60) disposed on the anchor plate (50). The two ends of the steel strand are respectively connected to the two anchors (60) and clamped to the anchors (60) by the clamps (61) on the anchors (60). The anchor plate (50) is disposed on two opposite surfaces of the upper tower column (91).

7. A tensioning device for construction of an externally oriented main tower according to claim 6, characterized in that, The clamping plate (61) is also provided with an anti-loosening pressure plate (70), the anti-loosening pressure plate (70) is provided with bolt holes (71), the anchor plate (50) is provided with mounting holes (51), the bolt holes (71) are connected to the mounting holes (51) for fasteners to pass through and lock.

8. A tensioning device for construction of an externally oriented main tower according to claim 6, characterized in that, The tie members (10) are configured in two sets; wherein, the tie member (10) located above is located at the upper crossbeam support bracket (92) of the upper tower column (91); the steel strand assembly (30) of the tie member (10) located below is configured in two sets, and the two sets of steel strand assemblies (30) are arranged sequentially in the left and right directions.

9. A tensioning device for an externally oriented main tower construction according to claim 8, characterized in that, The upper tower column (91) is provided with a supporting steel pipe (93), which is located at the upper crossbeam support bracket (92) of the upper tower column (91).

10. A tensioning device for an externally oriented main tower construction according to claim 8 or 9, characterized in that, It also includes a construction platform (80), which is disposed on two opposite surfaces of the upper tower column (91) and located below the steel strand assembly (30).

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