Steel structure and UHPC combined cable bent tower structure and construction method

Abstract

The invention discloses a steel structure and UHPC combined cable bent tower structure and a construction method, relates to the technical field of bridge engineering structures, and solves the problems that an existing steel-concrete combined cable bent tower structure is low in bearing efficiency, complex in structure, low in construction efficiency, low in industrial building degree and the like. Welding perforated longitudinal partition plates with steel bar holes and flow holes to form a plurality of cells; penetrating through reinforcing steel bars with threads at the two ends into holes of the longitudinal partition plates, and mechanically locking through nuts to form a three-dimensional reinforcing steel bar framework; corner steel pipes with extending connecting steel plates are arranged at the four corners of the tower column, and T-rib reinforcing joints are welded in the steel pipes and in the joint area; and finally, pouring ultra-high performance concrete into the steel structure cavity, and performing steam curing to form a composite. The comprehensive effects of remarkably shortening the construction period, reducing the construction risk, reducing the self weight, improving the bearing capacity and achieving the ultra-long service life are achieved, and the problems of efficient construction and long-term service of the large-span cable bent tower are comprehensively solved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering structure technology, and more specifically, to a steel structure and UHPC combined cable tower structure and its construction method. Background Technology

[0002] With the continuous increase in the span of cable-stayed bridges, the structural performance, construction efficiency, and maintainability of the pylon, as one of the main load-bearing components, have become particularly critical. Traditional pylons mostly adopt cast-in-place reinforced concrete structures, which, although having high rigidity and good stability, have problems such as long construction cycles, high safety risks, heavy weight, and poor durability.

[0003] Existing technologies mainly fall into two categories: traditional technologies widely employ cast-in-place reinforced concrete cable tower structures, which rely on on-site concrete pouring to form a monolithic tower body. With evolving engineering needs, composite cable tower technologies using steel-concrete composite tubes and steel-concrete composite plates have emerged in recent years. In these composite towers, steel tubes or plates serve as the outer shell, while ordinary concrete is filled inside, aiming to improve structural performance. However, these existing technologies have significant drawbacks. The construction process of traditional cast-in-place reinforced concrete cable towers is time-consuming and involves extensive on-site work, leading to extended project cycles. Simultaneously, high-altitude pouring operations increase safety risks, exposing workers to hazardous environments. The structure's significant self-weight increases the burden on the foundation, affecting the overall bridge design efficiency. Furthermore, ordinary concrete has poor durability and is prone to cracking and corrosion when exposed to harsh environments for extended periods, shortening its service life. While there have been some improvements in composite cable towers made of steel-concrete composite tubular steel and steel-concrete composite plates, the lack of a unified standard in design concepts has led to complex and varied tower column structures, increasing design difficulty and uncertainty. The low level of industrialized construction makes it difficult to achieve standardized production and efficient assembly, which limits construction progress and quality control. Furthermore, as bridge spans and tower heights continue to increase, the construction quality of high tower segments is difficult to control precisely, which can easily lead to deviations or defects, affecting the overall structural reliability and safety.

[0004] Therefore, how to study and design a steel structure and UHPC combined cable tower structure that can overcome the above-mentioned defects and the construction method are urgent problems to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a steel structure combined with UHPC (Ultra-High-Pressure Polymer) cable tower structure and its construction method. This method utilizes perforated longitudinal diaphragms to form a multi-cell structure. Through-bar reinforcing bars with threaded ends are inserted into the circular holes of the diaphragms and mechanically locked with nuts, forming a three-dimensional steel reinforcement skeleton. Corner steel pipes with extended steel plates are installed and welded to the steel wall panels of the tower as a whole. T-ribs are welded to reinforce the joints between the steel pipes and the tower wall. Finally, UHPC material is poured into the steel pipes and the cell compartments of the steel wall panels, and steam curing is performed to form a composite structure. This method solves the problems of long construction cycles and high risks associated with high-altitude operations in traditional cast-in-place concrete cable towers, effectively shortening the construction period and reducing construction risks.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] In a first aspect, a steel structure combined with a UHPC (Ultra-High-Pressure Polymer) cable tower structure is provided, comprising at least three multi-cavity double-plate UHPC composite structures and three corner steel pipe segments. Each pair of corner steel pipe segments is connected by the multi-cavity double-plate UHPC composite structures, forming a combined cable tower structure that is externally closed and internally hollow. The multi-cavity double-plate UHPC composite structure includes:

[0008] The outer steel wall panel and the inner steel wall panel are respectively located on the outer and inner sides of the tower wall of the cable tower structure;

[0009] Multiple perforated longitudinal diaphragms are welded at intervals to the outer steel wall panel and / or the inner steel wall panel, and are provided with flow holes and reinforcing bar holes;

[0010] The steel bar is inserted through the steel bar hole and fixed to the perforated longitudinal diaphragm by a nut;

[0011] UHPC is injected between the outer steel wall panel and the inner steel wall panel, as well as inside the corner steel pipe segments.

[0012] Furthermore, the spacing between the perforated longitudinal partitions on the outer steel wall panel and the inner steel wall panel is equal.

[0013] Furthermore, the perforated longitudinal partitions welded to the outer steel wall panel and the inner steel wall panel are alternately spliced ​​together, dividing the single chamber enclosed by the two steel wall panels into multiple independent compartments.

[0014] Furthermore, the flow holes are rectangular holes with rounded ends, and are equidistantly arranged on the perforated diaphragm plate to allow the UHPC to flow between the cells during injection.

[0015] Furthermore, the reinforcing bar holes are circular holes, each disposed between the various flow holes.

[0016] Furthermore, the corner steel pipe segment is provided with a steel plate connecting section, which is connected to the outer steel wall panel and the inner steel wall panel.

[0017] Furthermore, it also includes a first T-rib, which is a steel structure stiffening rib with a T-shaped cross section, welded to the inside of the steel pipe segment at the corner.

[0018] Furthermore, it also includes a second T-rib, which is welded to the outside of the steel pipe at the intersection of the tower walls and to the inside of the outer steel wall plate and the inner steel wall plate.

[0019] Secondly, a construction method for a steel structure and UHPC combined cable tower structure is provided. This construction method is used to realize a steel structure and UHPC combined cable tower structure as described in any one of the first aspects, and includes the following steps:

[0020] S1: Prepare the outer steel wall panel and the inner steel wall panel as the basic steel structure components of the cable tower structure;

[0021] S2: Weld the perforated longitudinal partition plates at equal intervals to the outer steel wall plate and the inner steel wall plate;

[0022] S3: Assemble the outer steel wall panel and the inner steel wall panel, and permanently fix the perforated longitudinal diaphragm on one side of the steel wall panel at both ends of the perforated longitudinal diaphragm arrangement direction to the other side steel wall panel by welding;

[0023] S4: Insert the through steel bar laterally into the steel bar hole and fix it to the perforated longitudinal diaphragm plate using the nut;

[0024] S5: Set the corner steel pipe segments at the four corner positions and weld them to the outer steel wall plate and the inner steel wall plate;

[0025] S6: Inject the UHPC between the steel pipe segment at the corner and the inner and outer steel wall plates of the tower wall, and ensure that the UHPC flows and fills evenly between the cells;

[0026] S7: Perform standard curing or steam curing on the combined structure after grouting to form a complete steel structure and UHPC combined cable tower structure.

[0027] Furthermore, before pouring the UHPC, a first T-rib is welded inside the steel pipe segment at the corner, and a second T-rib is welded outside the steel pipe at the intersection of the tower walls and inside the outer steel wall plate and the inner steel wall plate.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. This invention utilizes perforated longitudinal diaphragms to form a multi-cell structure. Through-bar reinforcing bars with threads at both ends are inserted into the circular holes of the diaphragms and mechanically locked with nuts, forming a three-dimensional reinforcing steel skeleton. Corner steel pipes with extended steel plates are installed and welded to the tower wall steel panels to form a whole. T-ribs are welded to reinforce the joints between the steel pipes and the tower wall. Finally, UHPC material is poured into the steel pipes and the steel panel cells, and steam curing is performed to form a composite structure. This solves the problems of long construction cycles and high risks associated with traditional cast-in-place concrete cable towers, effectively shortening the construction period and reducing construction risks.

[0030] 2. This invention uses a three-dimensional steel skeleton formed by through-bar reinforcement and perforated diaphragms for UHPC injection and curing. The steel bar-UHPC tenon connector formed by the circular steel bar holes in the through-bar reinforcement and perforated diaphragms effectively enhances the steel-concrete interface connection strength, improves mechanical properties, and simplifies and facilitates the control of the steel-concrete interface connector and internal structure. It solves the problems of inconsistent interface connector design, weak bonding strength, uneven stress transmission, and cumbersome construction in existing composite structures, achieving the effects of improving the overall stiffness of the tower column, increasing its load-bearing capacity, and simplifying the structure.

[0031] 3. This invention strengthens key parts locally through the synergistic effect of corner steel pipes and T-rib structures. It reduces the self-weight of the structure by using UHPC while significantly improving the load-bearing efficiency of the corner area, resulting in a lightweight and high-strength corner node. Combined with the steel-UHPC composite structure of the main body of this invention, it solves the problems of heavy self-weight, poor seismic performance and heavy foundation load of concrete and steel plate concrete cable tower segments, achieving the effect of reducing the self-weight of the structure and optimizing the foundation cost.

[0032] 4. By replacing ordinary concrete with ultra-high performance concrete (UHPC) for dense grouting and steam curing, a crack-free, highly dense concrete core is obtained. UHPC itself has excellent durability, and being encased inside a steel plate / steel pipe structure prevents UHPC from directly contacting the environment, greatly improving structural durability and solving the problems of poor concrete durability and susceptibility to environmental erosion. This achieves the effect of extending the service life of the cable tower and reducing maintenance costs. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 This is a schematic diagram of the assembly of the tower wall steel plate structure in Embodiment 1 of the present invention;

[0035] Figure 2 This is a schematic diagram of the tower wall steel structure in Embodiment 1 of the present invention;

[0036] Figure 3 This is a schematic diagram showing the connection between the corner steel pipe segment and the tower wall steel structure in Embodiment 1 of the present invention;

[0037] Figure 4 This is a schematic diagram of the steel structure and UHPC combined cable tower structure in Embodiment 1 of the present invention;

[0038] Figure 5 This is a plan view of the steel structure and UHPC combined cable tower structure in Embodiment 1 of the present invention;

[0039] The attached diagram shows the markings and corresponding component names:

[0040] 1. Outer steel wall panel; 2. Inner steel wall panel; 3. Perforated longitudinal diaphragm; 31. Reinforcing bar hole; 32. Flow hole; 4. Through reinforcing bar; 41. Nut; 5. Corner steel pipe segment; 61. First T-rib; 62. Second T-rib; 7. UHPC. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0042] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In the construction of cable-stayed bridge towers for long spans, existing technologies employ steel-concrete composite tower structures, resulting in thick tower walls and complex internal structures. This leads to low construction efficiency and a low level of industrialized construction, particularly in the difficulty of controlling the construction quality of high tower segments. The steel structure combined with UHPC composite tower structure and construction method proposed in this invention, by using UHPC as the main load-bearing material, is lighter and stronger, exhibiting superior seismic performance. It is especially suitable for bridge tower structures in areas with high seismic fortification requirements. Furthermore, its stress distribution is reasonable, its structure is simple, and its construction is highly efficient, facilitating factory fabrication and assembly construction. This benefits the quality control of the tower and improves the level of industrialized construction of the tower structure.

[0046] Example 1: A steel structure combined with UHPC cable tower structure, such as Figure 4 As shown, it includes an outer steel wall panel 1, an inner steel wall panel 2, a perforated longitudinal diaphragm 3, a through steel bar 4, a nut 41, a corner steel pipe segment 5, a first T-rib 61, a second T-rib 62, and a UHPC 7.

[0047] The steel and UHPC combined cable tower structure provided by the present invention is formed by welding perforated longitudinal diaphragms 3 at equal intervals to the inner and outer steel wall panels 1, through steel bars 4 passing through the perforated longitudinal diaphragms 3 and being fixed at both ends with nuts 41, steel pipe segments 5 at the corners being welded to the inner and outer steel wall panels 1 of the tower wall respectively, the first T rib 61 and the second T rib 62 being welded to the inside of the steel pipe at the corners and to the outside of the steel pipe at the intersection with the steel plate-UHPC tower wall and the inside of the steel wall panels on both sides, and finally, UHPC 7 is poured into the inside of the steel pipe and between the steel wall panels on both sides of the tower wall to form the steel structure and UHPC combined cable tower structure.

[0048] The double-steel-plate-UHPC composite web of this invention mainly bears the bending moment in the longitudinal and transverse directions of the bridge. It mainly includes an outer steel wall plate 1, an inner steel wall plate 2, a perforated longitudinal diaphragm 3, through-bar reinforcement 4, nuts 41, and UHPC 7. Due to the high strength / density ratio of UHPC 7 (approximately 2-4 times that of ordinary concrete), the double-steel-plate-UHPC composite web has a higher load-bearing efficiency compared to traditional double-steel-plate concrete bridge tower structures, achieving lightweighting of the bridge tower structure. Therefore, it has superior seismic performance and toughness, making it particularly suitable for engineering construction in areas with high seismic fortification requirements. Furthermore, the amount of work required for the substructure is correspondingly reduced, resulting in good technical and economic efficiency. This invention uses steel plates on both sides as concrete pouring templates, achieving template-free construction, which effectively simplifies the construction process and shortens the construction cycle. The outer and inner steel wall plates 2 are steel structural plates, respectively installed on the outer and inner sides of the tower wall.

[0049] To control the width-to-thickness ratio of the inner and outer steel wall panels and effectively improve the buckling resistance and steel-concrete composite effect of the steel wall panels, this invention designs an open longitudinal diaphragm 3, which is a steel structural plate, welded at equal intervals to the inner and outer steel wall panels 1, dividing the tower wall into multiple compartments. The multi-compartment double steel plate-UHPC structure can be equivalent to several steel pipe-UHPC columns in terms of stress. Compared with the existing single-compartment steel plate UHPC technology, its steel wall panel has a smaller width-to-thickness ratio, stronger buckling resistance, and a stronger steel-concrete composite effect, resulting in better mechanical properties under load.

[0050] The perforated longitudinal diaphragm 3 is provided with flow holes 32 and reinforcing bar holes 31. The flow holes 32 are rectangular holes with rounded ends, allowing the UHPC7 to flow between the cells during the pouring of the tower column. The reinforcing bar holes 31 are circular holes. The through reinforcing bars 4 adopt a transverse design. Considering that when traditional double steel plate-concrete structures are used in bridge towers, longitudinal reinforcing bars are usually set to form a reinforced concrete structure to bear the pressure, but in actual engineering applications, the connection process of longitudinal reinforcing bars is relatively complex and inefficient; while the use of the UHPC7 of this invention can significantly improve the pressure-bearing efficiency, and longitudinal reinforcing bars are not required for stress, thus bringing high efficiency to construction.

[0051] The through-bar 4 is threaded at both ends and inserted laterally into the bar hole 31 on the perforated longitudinal diaphragm 3; nuts 41 are screwed into both ends of the through-bar 4 to fix the through-bar 4 onto the perforated longitudinal diaphragm 3.

[0052] After the UHPC is poured, the steel bar-UHPC tenon connector formed by the steel bar hole 31 and the through steel bar 4 enhances the performance of the steel-concrete interface, facilitates design, and is highly adaptable to different plate thicknesses / load scenarios.

[0053] The double steel plate-UHPC composite web structure proposed in this invention has the advantages of simple structure, convenient construction, and prefabricated construction. It solves the problems of complex structure, high construction difficulty, and low degree of industrialization in traditional double steel plate concrete bridge tower structures, and realizes the lightweighting of bridge tower structures.

[0054] Considering the enormous axial pressure load on the tower, this invention incorporates corner steel pipe segments 5 at the four corners, using steel structural tubing. The corner steel pipe-UHPC composite structure leverages the material properties of both steel and UHPC to effectively bear the vertical pressure load borne by the tower. Steel plates of a certain length are installed along the inner and outer steel wall panels 1 of the tower wall to facilitate connection with the tower wall steel structure. To prevent delamination and debonding at the steel-UHPC interface and further enhance the steel-concrete composite effect, a first T-rib 61 is installed inside the corner steel pipe, and a second T-rib 62 is installed outside the steel pipe at the intersection of the steel plate and the UHPC tower wall, and inside the steel wall panels on both sides. These are all T-shaped cross-section steel structural stiffening ribs. The UHPC material itself possesses extremely excellent compressive strength, and its unilateral external support to the steel pipe prevents or delays local buckling under pressure, resulting in significantly superior mechanical properties compared to hollow steel pipe structures or reinforced concrete structures.

[0055] In some examples, depending on the stress requirements and structural requirements, transverse diaphragms or transverse stiffeners can be installed in a direction perpendicular to the steel wall panels and perforated longitudinal diaphragms to enhance the strength of the steel structure.

[0056] UHPC7 is poured into the space between the inner and outer steel wall panels 1 and inside the steel pipes to form a combined steel structure and UHPC cable tower structure. Because UHPC7 has a high strength-to-weight ratio, approximately 2 to 4 times that of ordinary concrete, it can significantly reduce the cross-sectional dimensions and self-weight of components. Therefore, this invention utilizes UHPC7 primarily to bear pressure loads, improving load-bearing efficiency while simultaneously making the structure lightweight, making it particularly suitable for structural designs with high seismic fortification requirements.

[0057] This invention's composite cable tower structure can achieve a rapid and efficient industrialized construction mode through factory prefabrication followed by on-site hoisting and assembly, or segmented prefabrication followed by on-site connection after dividing the cross-section. It features lightweight structure, high load-bearing efficiency, good seismic performance, and excellent construction quality control, especially for high-tower segments. It solves the problems of long construction cycles and high risks associated with traditional cast-in-place concrete cable towers, effectively shortening the construction period and reducing construction risks. It is applicable to bridge tower structures for long-span, high-tower cable-stayed bridges and pier structures for long-span bridges.

[0058] like Figure 1 As shown, the steel structure and UHPC combined cable tower structure provided in this embodiment of the invention includes an outer steel wall panel 1, an inner steel wall panel 2, and perforated longitudinal partitions 3 welded at equal intervals to the inner and outer steel wall panels 1.

[0059] like Figure 2As shown, after the steel structure of the tower wall of the steel structure and the UHPC combined cable tower structure provided in this embodiment of the invention are assembled, the perforated longitudinal diaphragm 3 divides the tower wall into multiple chambers, through which the through steel bars 4 are inserted and fixed to the perforated longitudinal diaphragm 3 at both ends with nuts 41. Then, the perforated longitudinal diaphragm 3 at both ends of the inner steel wall plate 2 are welded and fixedly connected to the outer steel wall plate 1 respectively.

[0060] like Figure 3 As shown, the steel structure and UHPC combined cable tower structure provided in this embodiment of the invention includes a corner steel pipe segment 5. After the tower wall steel structure is positioned and assembled, the corner steel pipe segment 5 is welded to the inner and outer steel wall plates of the tower wall. A first T-rib 61 is welded inside the steel pipe, and a second T-rib 62 is welded to the outside of the steel pipe and the inside of the two side steel wall plates at the intersection of the steel plate and the UHPC tower wall.

[0061] like Figure 4 , Figure 5 As shown, after the steel pipe segments 5 at the corners of the tower wall steel structure are positioned, assembled, and connected, the UHPC7 between the steel pipe and the inner and outer steel wall panels 1 of the tower wall is poured in. Then, after standard curing or steam curing of UHPC, a combined steel structure and UHPC cable tower structure is formed.

[0062] Example 2: A construction method for a steel structure and UHPC combined cable tower structure, comprising the following steps:

[0063] Prepare outer steel wall panel 1 and inner steel wall panel 2 as the basic steel structure components of the cable tower structure;

[0064] The perforated longitudinal diaphragm 3 is welded at equal intervals onto the outer steel wall panel 1 and the inner steel wall panel 2;

[0065] Assemble the outer steel wall panel 1 and the inner steel wall panel 2, and permanently fix the perforated longitudinal diaphragm 3 on one side of the steel wall panel at both ends of the arrangement direction of the perforated longitudinal diaphragm 3 to the other side of the steel wall panel by welding.

[0066] The perforated longitudinal diaphragm 3 divides the tower wall into multiple compartments and ensures that the flow hole 32 and the reinforcement hole 31 are aligned;

[0067] The through steel bar 4 is inserted laterally into the steel bar hole 31 and fixed to the perforated longitudinal diaphragm 3 with nut 41;

[0068] Corner steel pipe segments 5 are installed at the four corner positions and welded to the inner and outer steel wall plates 1 of the tower wall.

[0069] Weld the first T-rib 61 inside the corner steel pipe segment 5, and weld the second T-rib 62 outside the corner steel pipe segment 5 and inside the outer steel wall plate 1 and the inner steel wall plate 2.

[0070] UHPC7 is injected between the corner steel pipe segment 5 and the inner and outer steel wall plates 1 of the tower wall, and UHPC7 is ensured to flow and fill evenly between the cells.

[0071] After injection, the combined structure is cured using standard or steam curing methods to form a complete steel structure and UHPC combined cable tower structure.

[0072] Working Principle: This invention forms cells by welding perforated longitudinal diaphragms between inner and outer steel wall panels, inserting through reinforcing bars and mechanically locking them with nuts; corner steel pipes with extended steel plates are welded to the four corners of the tower column, and T-ribs are welded to reinforce key areas; UHPC is poured into the cavities of the steel components, and the concrete flows and fills through the holes in the longitudinal diaphragms. After curing, a combined steel structure and UHPC cable tower structure and construction method are formed. This structure combines the advantages of efficient steel structure construction and high strength and durability of UHPC, achieving lightweight and high load-bearing capacity, effectively shortening the construction period and reducing safety risks.

[0073] The steel structure combined with UHPC cable tower structure of the present invention improves the load-bearing efficiency and lightweight level of traditional steel tube concrete and steel plate-concrete composite bridge towers. While ensuring construction quality, it can achieve standardized manufacturing, effectively shorten the construction cycle, reduce safety risks, and provide technical support for this type of cable tower structure and construction.

[0074] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0075] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0076] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0077] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0078] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A steel structure combined with UHPC cable tower structure, characterized in that, It includes at least three multi-cavity double-plate UHPC composite structures and three corner steel pipe segments (5), with each pair of corner steel pipe segments (5) connected by the multi-cavity double-plate UHPC composite structures, forming a combined cable tower structure that is externally closed and internally hollow. The multi-cavity double-plate UHPC composite structure includes: The outer steel wall panel (1) and the inner steel wall panel (2) are respectively located on the outer and inner sides of the tower wall of the cable tower structure; Perforated longitudinal diaphragms (3) are welded at intervals to the outer steel wall panel (1) and / or the inner steel wall panel (2), and are provided with flow holes (32) and reinforcing bar holes (31). The steel bar (4) is inserted into the steel bar hole (31) and fixed to the perforated longitudinal diaphragm (3) by a nut (41). UHPC (7) is injected between the outer steel wall panel (1) and the inner steel wall panel (2) and inside the corner steel pipe segment (5).

2. The steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, The spacing between the perforated longitudinal partitions (3) on the outer steel wall panel (1) and the inner steel wall panel (2) is equal.

3. The steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, The perforated longitudinal partitions (3) welded to the outer steel wall panel (1) and the inner steel wall panel (2) are alternately spliced ​​together to divide the single chamber enclosed by the two steel wall panels into multiple independent compartments.

4. The steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, The flow holes (32) are rectangular holes with rounded ends, and are arranged at equal intervals on the perforated longitudinal partition (3) to allow the UHPC (7) to flow between the cells during injection.

5. The steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, The reinforcing bar holes (31) are circular holes, and are respectively arranged between each of the flow holes (32).

6. The steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, The corner steel pipe segment (5) is provided with a steel plate connecting section and is connected to the outer steel wall panel (1) and the inner steel wall panel (2).

7. The steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, It also includes a first T-rib (61), which is a steel structure stiffening rib with a T-shaped cross section, welded inside the steel pipe segment (5) at the corner.

8. A steel structure and UHPC combined cable tower structure according to claim 1, characterized in that, It also includes a second T-rib (62), which is welded to the outside of the steel pipe at the intersection of the tower wall and inside the outer steel wall plate (1) and the inner steel wall plate (2).

9. A construction method for a steel structure and UHPC combined cable tower structure, the construction method being used to realize the steel structure and UHPC combined cable tower structure as described in any one of claims 1-8, characterized in that, The following steps are involved: S1: Prepare the outer steel wall panel (1) and the inner steel wall panel (2) as the basic steel structure plates of the cable tower structure; S2: The perforated longitudinal partition (3) is welded at equal intervals to the outer steel wall plate (1) and the inner steel wall plate (2); S3: Assemble the outer steel wall panel (1) and the inner steel wall panel (2), and permanently fix the perforated longitudinal diaphragm (3) on one side of the steel wall panel at both ends of the arrangement direction of the perforated longitudinal diaphragm (3) to the other side of the steel wall panel by welding; S4: Insert the through steel bar (4) laterally into the steel bar hole (31) and fix it to the perforated longitudinal diaphragm (3) using the nut (41); S5: Set the corner steel pipe segments (5) at the four corner positions and weld them to the outer steel wall plate (1) and the inner steel wall plate (2); S6: Inject the UHPC (7) between the steel pipe segment (5) at the corner and the inner and outer steel wall plates of the tower wall, and ensure that the UHPC (7) flows and fills evenly between the cells; S7: Perform standard curing or steam curing on the combined structure after grouting to form a complete steel structure and UHPC combined cable tower structure.

10. A construction method for a steel structure and UHPC combined cable tower structure according to claim 9, characterized in that, Before pouring the UHPC (7), a first T-rib (61) is welded inside the steel pipe segment (5) at the corner, and a second T-rib (62) is welded outside the steel pipe at the intersection of the tower walls and inside the outer steel wall plate (1) and the inner steel wall plate (2).

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