Fabricated steel plate-UHPC tower column section and assembling method

Abstract

The invention discloses an assembly type steel plate-UHPC tower column segment and an assembly method, relates to the technical field of bridge engineering structures, and solves the problems that an existing steel plate concrete bridge tower is large in dead weight, complex in construction procedure, low in assembly degree and insufficient in segment connection reliability. According to the technical scheme, UHPC is adopted to fill the space between steel wall plates, so that the bearing efficiency and the lightweight level are improved, the buckling resistance of the steel wall plates is improved through perforated longitudinal partition plates, and the fluidity is optimized; reinforcing steel bars penetrate to enhance cooperative stress; the sections are welded through outer steel wall girths, UHPC female and male key teeth are nested to provide shearing resistance, and inner wall flange bolts are connected to achieve efficient assembly and post-earthquake repair; during construction, connection is conducted through female and male key tooth grouting hoisting matching or epoxy structural adhesive, then the outer wall is welded, bolts are fastened, factory full-section prefabrication and on-site rapid industrial construction are supported, the manual risk is reduced, and the method is suitable for multi-section type large-span cable bridges.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering structure technology, and more specifically, to a prefabricated steel plate-UHPC tower column segment and its assembly method. Background Technology

[0002] Currently, my country has an increasingly strong demand for cable-stayed bridges with ultra-long spans and ultra-heavy loads, traversing deep mountains and canyons, ultra-wide rivers, and complex sea areas. As the main load-bearing structure of cable-stayed bridges, further improving the load-bearing efficiency, lightweighting, and prefabricated construction of bridge towers is key to breakthroughs in span and industrialized construction of long-span bridges.

[0003] Existing technologies generally employ traditional reinforced concrete bridge towers and steel bridge towers. Traditional reinforced concrete bridge towers are primarily constructed of reinforced concrete, forming a thick-walled structure through on-site casting. They rely on the combination of the compressive strength of concrete and the tensile strength of steel reinforcement, making them suitable for small to medium-span bridges. Steel bridge towers are formed through welding or bolting, utilizing the high strength and ductility of steel, making them suitable for large-span bridges or scenarios with high seismic requirements. In recent years, to meet the development needs of long-span, high-tower, and multi-tower, multi-span cable-stayed bridges, the application of steel plate-concrete bridge towers has gradually increased. Combining the material advantages of steel plates and concrete, the steel plate provides external constraint, while the concrete fills the core, making them suitable for medium to large-span bridges.

[0004] However, existing technologies have the following drawbacks: 1) Traditional reinforced concrete bridge towers have a high risk of cracking under bending moment, with prominent hydration heat effects in thick-walled concrete, significant shrinkage and creep effects, and complex construction procedures, low efficiency, and difficulty in quality control when the bridge tower structure is complex; 2) Steel bridge towers require numerous stiffening structures for local stability, resulting in thick steel plates, high welding difficulty, large steel consumption, high construction costs, and large workload for anti-corrosion coating and high maintenance costs during operation; 3) Steel plate-concrete bridge towers suffer from inconsistent design concepts, complex tower column structures, and low levels of industrialized construction in engineering applications. Furthermore, as bridge spans and tower heights increase, the construction quality of high tower segments becomes difficult to control. Therefore, ultra-high performance concrete (UHPC) can be used to replace ordinary concrete to form steel plate-UHPC composite bridge towers, improving the load-bearing efficiency and lightweighting of the bridge towers. While simplifying the tower column structure, it can also achieve industrialized construction through full-section prefabrication in the factory and on-site assembly.

[0005] Therefore, how to study and design a prefabricated steel plate-UHPC tower column segment and its assembly method that can overcome the above-mentioned defects is an urgent problem to be solved. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a prefabricated steel plate-UHPC tower segment and its assembly method. This method achieves smooth force transmission through circumferential welding of the outer steel wall panel, provides mechanical interlocking force to resist shear force through nested UHPC male and female keyway connections, and enables rapid assembly through flange bolt connections of the inner steel wall panel. Combined with the material properties of ultra-high performance concrete (UHPC), a prefabricated connection structure with multi-path collaborative force transmission is obtained. This improves the connection strength between tower segments, shortens the installation time of a single segment, and reduces the self-weight of the tower, ultimately achieving comprehensive benefits including optimized bridge tower load-bearing efficiency, improved industrialized construction level, and carbon emission reduction throughout the entire life cycle.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0008] Firstly, a prefabricated steel plate-UHPC tower column segment is provided, comprising:

[0009] The main body of the tower column segment is a box-shaped hollow composite structure;

[0010] Female key teeth are provided at one end of the main body of the tower column segment;

[0011] The male key tooth is located at the other end of the main body of the tower column segment. The connection between the contact surfaces of adjacent tower column segments is achieved by the nesting and biting of the female key tooth of the installed tower column segment with the male key tooth of the tower column segment to be installed.

[0012] An integral transverse diaphragm-flange plate is installed at both ends of the main body of the tower column segment. The integral transverse diaphragm-flange plate of the adjacent tower column segment is connected by a pair of large hexagonal head high-strength bolts, thereby realizing the assembly and fastening of the inner wall of the adjacent tower column segment.

[0013] Furthermore, the main body of the tower segment includes:

[0014] The outer steel wall panel and the inner steel wall panel are respectively located on the outer and inner sides of the main body of the tower column segment;

[0015] Perforated longitudinal diaphragms are welded at intervals to the outer steel wall plate and the inner steel wall plate, and are provided with flow holes and reinforcing bar holes;

[0016] The steel bar is inserted through the steel bar hole and fixed to the perforated longitudinal diaphragm by a nut;

[0017] Corner stiffening ribs are welded to the outer steel wall plate and the inner steel wall plate at the corner of the tower column;

[0018] UHPC is injected between the outer steel wall panel and the inner steel wall panel.

[0019] Furthermore, the perforated longitudinal partitions are welded at equal intervals to the outer steel wall panel and the inner steel wall panel, and through assembly and docking, the single chamber enclosed by the outer steel wall panel and the inner steel wall panel is divided into multiple independent compartments.

[0020] Furthermore, the flow holes are equidistantly arranged on the perforated longitudinal partition plate, and the reinforcing bar holes are disposed between each of the flow holes.

[0021] Furthermore, the corner stiffening ribs are longitudinally welded to the outer steel wall panel and the inner steel wall panel, and are provided with equidistant circular holes.

[0022] Furthermore, the integral diaphragm-flange plate integrates the functions of a diaphragm and a flange connecting plate, and is equipped with an injection hole, a female tooth outer steel pipe, a male tooth outer steel pipe, and bolt holes distributed at equal intervals.

[0023] Furthermore, the diameter of the female tooth outer steel tube is larger than the diameter of the male tooth outer steel tube.

[0024] Furthermore, the tower structure includes steel plate-UHPC tower structures with box-shaped cross-sections, single-box three-chamber cross-sections, single-box multi-chamber cross-sections, and polygonal cross-sections.

[0025] Furthermore, the integral transverse diaphragm-flange plate is provided with cross-shaped steel structural cross bracing.

[0026] Secondly, a method for assembling a prefabricated steel plate-UHPC tower column is provided. This method, used to assemble a prefabricated steel plate-UHPC tower column as described in any one of the first aspects, includes the following steps:

[0027] After the construction of the cast-in-place tower base segment or the already installed tower column segment is completed, the tower column segment to be installed is lifted. The tower column segment is a steel plate-UHPC box-shaped tower column segment.

[0028] Inject grout into the female toothed outer steel pipe at the top of the installed tower column segment, insert the male key tooth at the bottom of the tower column segment to be installed into the female key tooth at the top of the installed tower column segment until the grout overflows, thus completing the key tooth assembly.

[0029] Alternatively, after applying epoxy structural adhesive evenly and in appropriate amounts to the female and male key teeth, insert the male key tooth at the bottom of the tower column segment to be installed into the female key tooth at the top of the already installed tower column segment to complete the key tooth assembly.

[0030] The outer steel wall plates of the installed tower column segment and the tower column segment to be installed are circumferentially welded.

[0031] The assembly between the two sections is completed by using high-strength hexagonal head bolts to connect the integral transverse diaphragm-flange plate to the bolt holes.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. By achieving smooth force transmission through circumferential welding of the outer steel wall panel, providing mechanical interlocking force to resist shear force through nested UHPC male and female key tooth connections, and achieving rapid assembly through flange bolt connections of the inner steel wall panel, combined with the material characteristics of ultra-high performance concrete (UHPC), a prefabricated connection structure with multi-path collaborative force transmission is obtained. This improves the connection strength between tower segments, shortens the installation time of a single segment, and reduces the self-weight of the tower, ultimately achieving comprehensive benefits such as optimized bridge tower load-bearing efficiency, improved industrialized construction level, and carbon emission reduction throughout the entire life cycle.

[0034] 2. This invention utilizes a nested, interlocking design of female key teeth and male key teeth to form a mechanically interlocking shear-resistant interface, significantly improving the inter-segment shear capacity. The diameter of the outer steel pipe of the female key tooth is slightly larger than that of the outer steel pipe of the male key tooth, ensuring precise guidance and dense grout filling during assembly. Alternatively, epoxy structural adhesive can be applied evenly and in appropriate amounts to the female and male key teeth for connection; this enhances the friction and mechanical interlocking force between the key teeth, resisting most of the shear load within the tower column section, while avoiding the risk of shrinkage cracks associated with traditional cast-in-place joints. The outer steel pipe protects the UHPC key teeth from damage during manufacturing and transportation, ensuring the integrity of the connection.

[0035] 3. This invention achieves seamless force transfer between adjacent tower column segments through continuous circumferential welds on the outer steel wall panels. The welds are applied along the entire circumference of the tower column, eliminating stress concentration issues associated with traditional intermittent welding and improving the bending stiffness of the outer wall. The welded structure is simple and reliable, avoiding interference from stiffening ribs on the outer wall panels and optimizing the streamlined design of the tower column. Simultaneously, the weld, as a rigid connection, complements the shear resistance of the key teeth and the tensile resistance of the bolts, jointly bearing the combined bending and torsional loads of the tower column and reducing relative displacement between segments.

[0036] 4. This invention integrates the functions of diaphragm support and flange connection into a single transverse diaphragm-flange plate, achieving efficient assembly of the inner steel wall panel through high-strength bolt connections. Evenly distributed bolt holes ensure uniform load transfer, while the flange plate acts as a transverse stiffener, guaranteeing smooth and reliable transmission of lateral forces. Cross-shaped steel structural braces are welded to the flange plate inside the box-shaped section, enhancing lateral stiffness while reducing the length-to-width ratio of the tower column to mitigate the adverse effects of initial geometric defects and construction errors on the tower column's compressive stability, effectively improving the tower column's compressive stability. This component avoids wet construction work involving cast-in-place concrete, increasing construction speed, and the bolted connection allows for post-earthquake replacement, reducing life-cycle maintenance costs.

[0037] 5. This invention realizes an industrialized construction mode of full-section prefabrication in the factory and on-site assembly construction, which greatly reduces labor input, improves construction efficiency and quality accuracy, and at the same time reduces material usage and construction costs through lightweighting and efficient connection, providing reliable technical support for the bridge tower structure of ultra-large span cable-stayed bridges. Attached Figure Description

[0038] 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:

[0039] Figure 1 This is a schematic diagram of the segmental connection of the prefabricated steel plate-UHPC box-shaped tower column in Embodiment 1 of the present invention;

[0040] Figure 2 This is a schematic diagram of the steel structure of the prefabricated steel plate-UHPC box-shaped tower column in Embodiment 1 of the present invention;

[0041] Figure 3 This is a plan view of the steel structure of the prefabricated steel plate-UHPC box-shaped tower column in Embodiment 1 of the present invention;

[0042] Figure 4 This is a schematic diagram of the UHPC of the prefabricated steel plate-UHPC box-shaped tower column in Embodiment 1 of the present invention;

[0043] Figure 5 This is a schematic diagram of the connection part of the prefabricated steel plate-UHPC box-shaped tower column to be installed in Embodiment 2 of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of the assembled steel plate-UHPC box-shaped tower column with connected segments in Embodiment 2 of the present invention;

[0045] Figure 7 This is a structural elevation view of the connection part of the prefabricated steel plate-UHPC box-shaped tower column in Embodiment 2 of the present invention;

[0046] Figure 8 This is a schematic diagram of the structure of the prefabricated steel plate-UHPC box-shaped tower column connection part in Embodiment 2 of the present invention;

[0047] Figure 9 This is a schematic diagram of the tower wall connection of the prefabricated steel plate-UHPC box-shaped tower column in Embodiment 2 of the present invention.

[0048] The attached diagram shows the markings and corresponding component names:

[0049] 1. Installed tower column segment; 2. Tower column segment to be installed; 3. Outer steel wall panel; 31. Perforated longitudinal diaphragm; 32. Flow hole; 33. Reinforcing bar hole; 4. Inner steel wall panel; 5. Through reinforcing bar; 51. Nut; 6. Corner stiffening rib; 7. Integral transverse diaphragm-flange plate; 71. Female toothed outer steel pipe; 72. Male toothed outer steel pipe; 73. Grouting hole; 74. Bolt hole; 8. UHPC; 81. Female key tooth; 82. Male key tooth; 9. Large hexagonal head high-strength bolt connection pair. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] Example 1: A prefabricated steel plate-UHPC tower column segment, such as Figure 2 and Figure 4 As shown, it includes an outer steel wall panel 3, an inner steel wall panel 4, a perforated longitudinal diaphragm 31, a through steel bar 5, a nut 51, a corner stiffening rib 6, an integral transverse diaphragm-flange plate 7, and a UHPC 8.

[0055] The outer steel wall panel 3 has a rectangular cross section with four rounded chamfers.

[0056] The inner steel wall panel 4 has a rectangular cross section with four right-angled chamfers.

[0057] The perforated longitudinal partition 31 is made of steel plate and is welded at equal intervals to the inner and outer steel wall plates 3. The perforated longitudinal partition 31 divides the tower wall into multiple compartments. Flow holes 32 and reinforcing bar holes 33 are provided on it. The flow holes 32 are rectangular holes with round ends, which allow UHPC8 to flow between the compartments when the tower column UHPC8 is poured. The reinforcing bar holes 33 are circular holes.

[0058] The two ends of the through steel bar 5 are threaded and inserted laterally into the steel bar hole 33 on the perforated longitudinal diaphragm 31.

[0059] Nuts 51 are screwed into both ends of the through steel bar 5 to fix the through steel bar 5 onto the perforated longitudinal diaphragm 31.

[0060] The corner stiffening rib 6 is a steel plate stiffening rib, which is longitudinally set and welded to the inner steel wall plate 4 and the outer steel wall plate 3 at the corner of the tower column.

[0061] In some examples, equidistant circular holes may be provided on the stiffening ribs 6 at the corners.

[0062] Depending on the stress requirements and structural requirements, the corner stiffener 6 can be a flat stiffener without a round hole, or a perforated plate stiffener such as a PBL stiffener, or a T-rib; by locally strengthening the combination of the corner steel wall plate and UHPC8 with the stiffener, the material mechanical properties of steel and UHPC8 can be fully utilized.

[0063] The integral transverse diaphragm-flange plate 7 is a steel structure plate with injection holes 73, female toothed outer steel pipe 71, male toothed outer steel pipe 72 and bolt holes 74. It is horizontally welded to the inner and outer steel wall plates 3 of the tower column segment. The injection holes 73 are used to inject UHPC8 into the tower wall after the tower column steel structure is fabricated. The female toothed outer steel pipe 71 and male toothed outer steel pipe 72 are used to make female key teeth 81 and male key teeth 82, respectively. The bolt holes 74 are used to realize the high-strength bolt-flange connection.

[0064] The integral transverse diaphragm-flange plate 7 of the present invention facilitates the smooth transfer of lateral loads within the tower column section. In addition, the inner steel wall plate 4 of the tower column can quickly and efficiently realize the assembly connection of tower column segments through flange-bolts, avoiding the problems of slow construction speed and difficult quality control of wet connections such as cast-in-place concrete. Moreover, the flange bolt connection has strong post-earthquake repairability, which can realize the rapid post-earthquake repair of the tower column connection part.

[0065] This invention adopts an assembled structure of male and female key teeth 82 to achieve the connection of UHPC8 between tower column segments. The design principle of the outer steel pipe is to ensure the integrity of the key teeth and the reliability of force transmission, so as to prevent the exposed key teeth from cracking or being lost during manufacturing and demolding, which would affect the connection effect. In addition, the nested male and female key teeth 82 provide better mechanical interlocking force to effectively participate in resisting the shear load in the tower column section.

[0066] In some examples, the diameter of the female tooth outer steel pipe 71 is slightly larger than the diameter of the male tooth outer steel pipe 72.

[0067] UHPC8 is injected between the inner and outer steel wall plates 3 of the tower wall to form a steel plate-UHPC bridge tower segment. Since all the perforated longitudinal diaphragms 31 are provided with injection holes 73, UHPC8 can flow between the inner and outer steel wall plates of the entire cross section until the injection is completed.

[0068] like Figure 1 As shown, the steel plate-UHPC tower column segment 1 is either a cast-in-place segment at the bottom of the tower or a precast tower column segment with a full cross-section. The tower column segment 2 to be installed is a precast tower column segment with a full cross-section. The segment 1 and segment 2 are connected efficiently and reliably through the segment connection structure provided in this embodiment of the invention.

[0069] like Figure 2 , Figure 3 As shown, the steel plate-UHPC tower column structure provided in this embodiment of the invention includes an outer steel wall plate 3, an inner steel wall plate 4, a perforated longitudinal diaphragm plate 31, a through-bar reinforcing bar 5, and a nut 51. The perforated longitudinal diaphragm plate 31 is provided with flow holes 32 and reinforcing bar holes 33. The perforated longitudinal diaphragm plate 31 divides the tower wall into multiple chambers. The flow holes 32 allow the injected UHPC 8 to flow between different chambers, the reinforcing bar holes 33 allow the through-bar reinforcing bar 5 to be inserted, and the nut 51 fixes the through-bar reinforcing bar 5 to the perforated longitudinal diaphragm plate 31 at both ends.

[0070] Continue to refer to Figure 2 , Figure 3 As shown, the steel plate-UHPC tower column structure provided in this embodiment of the invention also includes corner stiffening ribs 6, which can strengthen the interconnection between the steel wall plates 3 and 4 at the corners of the tower column and the UHPC 8.

[0071] Continue to refer to Figure 2 , Figure 3 As shown, the steel plate-UHPC tower column structure provided in this embodiment of the invention includes an integral transverse diaphragm-flange plate 7, on which are provided a female toothed outer steel pipe 71, a male toothed outer steel pipe 72, a grouting hole 73 and a bolt hole 74.

[0072] like Figure 4 As shown, UHPC8 is injected into the tower column segment through injection hole 73, and corresponding female key teeth 81 and male key teeth 82 are formed at the upper and lower ends of UHPC8.

[0073] Example 2: A method for inter-segment assembly of prefabricated steel plate-UHPC box-shaped tower columns, based on the above-mentioned steel plate-UHPC box-shaped tower column structure, including:

[0074] After the cast-in-place segment construction at the base of the tower is completed, the precast steel plate-UHPC box-shaped tower column segments can be hoisted and installed. The segment assembly method of the steel plate-UHPC box-shaped tower column is applicable to the connection between the base segment and the precast tower column segments, as well as between the precast tower column segments. For two tower column segments adjacent to the connecting structure, the segment closer to the base is the installed segment, and the segment closer to the top is the segment to be installed. The connecting structure is the connection point between the two segments. After the installed segment is completed, the segment to be installed is hoisted, and the top of the installed segment... Grouting is performed inside the female key teeth 81; the segment to be installed is precisely positioned, and the male key teeth 82 at the bottom of the segment are inserted into the female key teeth 81 at the top of the installed segment until grout overflows, completing the matching connection of the female key teeth 81 and the male key teeth 82; the outer steel wall plates 3 of the installed segment and the segment to be installed are welded circumferentially to form a circumferential weld, completing the connection of the outer steel wall plates 3 between the two segments; after the bolt holes 74 on the integral transverse diaphragm-flange plate 7 are precisely matched, the inner steel wall plates 4 between the two segments are connected using large hexagonal head high-strength bolt connection pairs 9. Among them, the circumferential welding of the outer steel wall plates 3 ensures the smooth transmission of force flow, and its simple and reliable connection structure is also conducive to the landscape design and aesthetic effect of the cable tower structure.

[0075] In some examples, the key assembly can be completed by uniformly and appropriately applying epoxy structural adhesive to the female key teeth 81 and the male key teeth 82, and then inserting the male key teeth 82 at the bottom of the tower column segment 2 to be installed into the female key teeth 81 at the top of the already installed tower column segment 1.

[0076] In some examples, to improve the compressive stability of the tower column, cross bracing can be installed on the integral transverse diaphragm-flange plate 7 inside the box-shaped section, depending on the stress requirements or structural requirements. By setting cross bracing, the length-to-width ratio of the tower column is reduced, and the adverse effects of factors such as initial geometric defects and construction errors on the compressive mechanical properties of the tower column are reduced, thereby effectively improving the compressive stability of the tower column.

[0077] The prefabricated connection method provided by the present invention realizes the prefabricated connection of steel plate-UHPC tower column segments through multi-path coordinated force transmission by welding the outer steel wall plate 3, connecting the inner steel wall plate 4 with flange bolts, and mechanically engaging the female key teeth 8 and the male key teeth 82.

[0078] like Figure 5 As shown, the connection parts of the segment to be installed include the male key tooth 82, the outer steel wall plate 3, and the bolt holes 74 on the integral transverse diaphragm-flange plate 7.

[0079] like Figure 6 As shown, the connection parts of the installed segments include the female key teeth 81, the outer steel wall plate 3, and the bolt holes 74 on the integral transverse diaphragm-flange plate 7.

[0080] like Figure 7 , Figure 8 and Figure 9As shown, the connection between tower column segments includes female key teeth 81, male key teeth 82, outer steel wall plate 3, integral transverse diaphragm-flange plate 7, and large hexagonal head high-strength bolt connection pair 9. Grouting is injected into the female key teeth 81 of the installed tower column segment 1, and then the tower column segment 2 to be installed is hoisted and precisely positioned. The male key teeth 82 are inserted into the female key teeth 81 until grout overflows, completing the matching connection between the female key teeth 81 and the male key teeth 82. Alternatively, epoxy structural adhesive can be evenly and appropriately applied to the female key teeth 81 and the male key teeth 82, and then the male key teeth 82 at the bottom of the tower column segment 2 to be installed are inserted into the female key teeth 81 at the top of the installed tower column segment 1 to complete the key tooth assembly.

[0081] Continue to refer to Figure 7 , Figure 8 and Figure 9 As shown, the outer steel wall plates 3 of the installed tower column segment 1 and the tower column segment 2 to be installed are welded in a circumferential manner to achieve a matching connection between the steel wall plates.

[0082] Continue to refer to Figure 7 , Figure 8 and Figure 9 As shown, after the integral transverse diaphragm-flange plate 7 of the installed tower column segment 1 and the tower column segment 2 to be installed is precisely positioned and matched, the flange plates of the two segments are connected by a large hexagonal head high-strength bolt connection pair 9 to achieve the matching connection of the inner steel wall plate 4 between the two segments.

[0083] The steel plate-UHPC box-shaped tower structure and the inter-segment connection structure applicable to prefabricated steel plate-UHPC box-shaped towers provided in this application embodiment achieve high load-bearing efficiency and lightweight level of steel plate concrete bridge towers, as well as reliable connection between segments of fully prefabricated steel plate-UHPC tower columns, providing technical support for this type of cable tower structure and construction.

[0084] Working Principle: This invention uses ultra-high performance concrete to replace ordinary concrete, significantly improving the load-bearing efficiency and lightweighting of bridge towers, reducing self-weight for suitability for long-span, high-tower bridges. Based on a multi-path collaborative force transmission mechanism: the outer steel wall panel ensures smooth force transmission and structural integrity through circumferential welding; the UHPC key design utilizes nested male and female keys to provide mechanical interlocking force to resist shear loads, while the outer steel pipe protects the keys from damage; during construction, grout is injected into the female keys of the installed segment, the segment to be installed is hoisted and positioned, and the male key is inserted until the grout overflows to complete the matching connection. Alternatively, epoxy structural adhesive can be evenly applied to the male and female keys, and then the male key at the bottom of the tower segment to be installed is inserted into the female key at the top of the installed tower segment to complete the key assembly. Subsequently, the outer wall is welded circumferentially and the inner flange plate is fastened using high-strength bolts, achieving efficient prefabrication construction, solving traditional quality problems, supporting full-section prefabrication in the factory and industrialized construction on site, and optimizing material usage and construction costs.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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 prefabricated steel plate-UHPC tower column segment, characterized in that, include: The main body of the tower column segment is a box-shaped hollow composite structure; Female key tooth (81) is provided at one end of the main body of the tower column segment; A male key tooth (82) is provided at the other end of the main body of the tower column segment. The connection of the contact surfaces of adjacent tower column segments is achieved by the female key tooth (81) of the installed tower column segment (1) nesting and biting the male key tooth (82) of the tower column segment to be installed (2). An integral diaphragm-flange plate (7) is set at both ends of the main body of the tower column segment. The integral diaphragm-flange plate (7) of the adjacent tower column segment is connected by a large hexagonal head high-strength bolt pair (9) to achieve the assembly fastening of the inner wall of the adjacent tower column segment.

2. The prefabricated steel plate-UHPC tower column segment according to claim 1, characterized in that, The main body of the tower segment includes: The outer steel wall panel (3) and the inner steel wall panel (4) are respectively provided on the outer and inner sides of the main body of the tower column segment; Perforated longitudinal partitions (31) are welded at intervals to the outer steel wall plate (3) and the inner steel wall plate (4), and are provided with flow holes (32) and reinforcing bar holes (33); The through-bar (5) is inserted into the bar hole (33) and fixed to the perforated longitudinal diaphragm (31) by a nut (51); Corner stiffening ribs (6) are welded to the outer steel wall plate (3) and the inner steel wall plate (4) at the corner of the tower column; UHPC (8) is injected between the outer steel wall panel (3) and the inner steel wall panel (4).

3. The prefabricated steel plate-UHPC tower column segment according to claim 2, characterized in that, The perforated longitudinal partition (31) is welded at equal intervals to the outer steel wall panel (3) and the inner steel wall panel (4), and through assembly and docking, the single chamber enclosed by the outer steel wall panel (3) and the inner steel wall panel (4) is divided into multiple independent compartments.

4. The prefabricated steel plate-UHPC tower column segment according to claim 2, characterized in that, The flow holes (32) are arranged at equal intervals on the perforated longitudinal partition plate (31), and the reinforcing bar holes (33) are arranged between each of the flow holes (32).

5. A prefabricated steel plate-UHPC tower column segment according to claim 2, characterized in that, The corner stiffening ribs (6) are longitudinally welded to the outer steel wall plate (3) and the inner steel wall plate (4), and are provided with equidistant circular holes.

6. The prefabricated steel plate-UHPC tower column segment according to claim 1, characterized in that, The integral diaphragm-flange plate (7) integrates the functions of the diaphragm plate and the flange connecting plate, and is provided with an injection hole (73), a female tooth outer steel pipe (71), a male tooth outer steel pipe (72), and bolt holes (74) distributed at equal intervals.

7. A prefabricated steel plate-UHPC tower column segment according to claim 6, characterized in that, The diameter of the female tooth outer steel pipe (71) is larger than the diameter of the male tooth outer steel pipe (72).

8. A prefabricated steel plate-UHPC tower column segment according to claim 1, characterized in that, The tower structure includes steel plate-UHPC tower structures with box-shaped cross-section, single-box three-chamber cross-section, single-box multi-chamber cross-section, and polygonal cross-section.

9. A prefabricated steel plate-UHPC tower column segment according to claim 1, characterized in that, The integral diaphragm-flange plate (7) is provided with cross-shaped steel structure cross bracing.

10. A method for assembling a prefabricated steel plate-UHPC tower column, characterized in that, The assembly method is used to assemble a prefabricated steel plate-UHPC tower column as described in any one of claims 1-9, and includes the following steps: After the construction of the cast-in-place section or the already installed tower column section (1) at the bottom of the tower is completed, the tower column section (2) to be installed is lifted. The tower column section is a steel plate-UHPC box-shaped tower column section. Inject slurry into the female toothed outer steel pipe (71) at the top of the installed tower column segment (1), insert the male key tooth (82) at the bottom of the tower column segment (2) to be installed into the female key tooth (81) at the top of the installed tower column segment (1) until the slurry overflows, and complete the key tooth assembly. Alternatively, after applying epoxy structural adhesive evenly and in appropriate amounts to the female key teeth (81) and male key teeth (82), insert the male key teeth (82) at the bottom of the column segment to be installed (2) into the female key teeth (81) at the top of the column segment already installed (1) to complete the key tooth assembly. The outer steel wall plates (3) of the installed tower column segment (1) and the tower column segment (2) to be installed are circumferentially welded; The assembly between the two sections is completed by fixing the bolt holes (74) on the integral transverse diaphragm-flange plate (7) with the large hexagonal head high-strength bolt connection pair (9).

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