Section steel composite framework type cable bent tower

Abstract

The utility model provides a section steel composite framework type cable bent tower, which relates to the field of bridge cable bent towers, and comprises a section steel composite framework and concrete for pouring and wrapping the section steel composite framework, the structural steel composite framework type cable bent tower has the advantages that the high strength of the structural steel and the high rigidity of the reinforced concrete are effectively combined, and the bearing capacity and the deformation resistance of the cable bent tower are effectively improved; the mechanical property, the construction efficiency, the economic performance and the like are excellent; in addition, the prefabricated framework assembly can reduce site construction time and difficulty, improves construction efficiency and economic benefits, and is high in popularization value.

Description

Technical Field

[0001] The utility model relates to the field of bridge cable towers, in particular to a steel composite frame type cable tower. Background Art

[0002] Bridge pylons are crucial structural components in modern bridge engineering, especially in cable-stayed bridges and suspension bridges. Existing technologies cover a variety of materials and structural forms, aiming to improve the bearing capacity, durability and construction efficiency of bridges. Common bridge pylons include reinforced concrete pylons, steel pylons, steel shell concrete pylons, etc.

[0003] Reinforced concrete cable towers are a common structural form in current bridge engineering. The most common method of steel bar construction is still post-processing of unit components, which are manually tied and formed on site. This is a labor-intensive operation. Although the technical requirements are low and it has strong adaptability to special-shaped structures, it has a high demand for manpower. At the same time, reinforced concrete usually has a large deadweight, which may increase the overall load of the bridge and the complexity of the foundation design. For large-span bridges, the amount of steel bars used in reinforced concrete cable towers is large, the number of steel bars is large, and the construction intensity is high.

[0004] Cable towers are generally made of steel, including a tower structure welded from steel pipes or steel plates. The various modules and components of the cable tower are prefabricated in the factory and then transported to the site for assembly. Large equipment such as tower cranes and crawler cranes are used to hoist the cable tower. The cable tower is exposed to harsh natural environments for a long time, and the steel structure is susceptible to corrosion, especially in environments with high humidity and high salinity. The corrosion rate is faster. In order to extend the service life, regular anti-corrosion treatment and protection measures are required, which increases maintenance costs and construction difficulties. The design and manufacture of steel structures involve complex engineering calculations and precise manufacturing techniques, requiring high-level engineers and technicians. The installation and adjustment of cable towers require large-scale lifting equipment and high-precision construction techniques, which increase the technical requirements and safety risks of construction.

[0005] Steel shell concrete cable tower is a bridge cable tower structure that combines steel structure with concrete structure. The design of steel shell concrete cable tower combines the characteristics of steel structure and concrete structure. It usually uses steel shell as the outer layer and fills the interior with concrete to form a composite structure. The prefabricated steel shell modules are transported to the site and hoisted and assembled by tower cranes or crawler cranes. During the on-site assembly process, high-strength welding or bolting is used between the modules. After the steel shell is assembled, the internal concrete is poured in sections. The manufacture of steel shell concrete cable towers requires high-precision processing technology and equipment, including the manufacture, assembly and maintenance of steel shell and concrete. On-site construction requires precise process control and large-scale equipment support, such as formwork and support systems, which increases the complexity and cost of construction.

[0006] To sum up, reinforced concrete cable towers are the most common structural form in current bridge engineering. The main construction difficulty and focus lies in the steel bar construction operation. Therefore, how to improve the construction efficiency of the steel skeleton, reduce the on-site construction time and difficulty, and improve the construction efficiency and economic benefits has become a problem that technical personnel in this field need to solve urgently. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a steel composite frame type cable tower. The prefabricated frame components of the patent can reduce the time and difficulty of on-site construction, improve construction efficiency and economic benefits, and have great promotion value.

[0008] The utility model is realized through the following technical solutions:

[0009] A steel composite frame type cable tower comprises a steel composite frame and concrete cast to wrap the steel composite frame, wherein the steel composite frame comprises a plurality of prefabricated frame components which are vertically fixed and spliced ​​in sequence, the frame components are closed rectangular structures, the frame components comprise a plurality of vertically parallel arranged steel units, transverse steel bars, longitudinal steel bars and connecting steel frames, the steel units are fixedly connected to a group of cast tower column segments via connecting components, the transverse steel bars are fixedly connected to the steel units via limiters, the longitudinal steel bars are fixedly connected to the transverse steel bars, and the two ends of the connecting steel frame are respectively fixedly connected to the upper parts of two adjacent groups of steel units.

[0010] It can be seen that in the above technical scheme, the steel composite frame type cable tower of this patent effectively combines the high strength of steel and the high stiffness of reinforced concrete, effectively improves the bearing capacity and anti-deformation performance of the cable tower, and performs well in mechanical properties, construction efficiency, and economic performance. In addition, the prefabricated frame components of this patent can reduce the time and difficulty of on-site construction, improve construction efficiency and economic benefits, and have great promotion value.

[0011] According to the above technical solution, preferably, the cross section of the steel unit is an I-section, and shear keys inserted into concrete are evenly arranged on the outer side of the flange of the steel unit.

[0012] It can be seen that in the above technical solution, the shear key can effectively improve the connection integrity of the concrete and steel units.

[0013] According to the above technical solution, preferably, the connection assembly includes multiple groups of anchor bolts, leveling nuts, column base plates, gaskets and fastening nuts from bottom to top, the main part of the anchor bolts is buried in the upper part of the previous group of cast tower column segments, the leveling nuts are threadedly connected to the anchor bolts, the column base plates are sleeved on the anchor bolts, the gaskets and fastening nuts are sequentially inserted into the anchor bolts, and the fastening nuts are threadedly connected to the anchor bolts.

[0014] It can be seen that in the above technical solution, the main part of the anchor bolt is buried in the upper part of the previous group of cast tower column segments, and then the leveling nut is threadedly connected to the anchor bolt, and then the column foot plate is put on the anchor bolt, and finally the gasket and the fastening nut are put into the anchor bolt in turn, so as to realize the assembly and positioning of the connection component. After the subsequent skeleton component is hoisted into place, the lower end of the steel unit is welded and fixed to the column foot plate.

[0015] According to the above technical solution, preferably, the upper end surface of the tower column segment is located at the lower side of the column foot bottom plate and is provided with a shear-resistant groove, and the lower end surface of the column foot bottom plate is provided with a protrusion inserted into the shear-resistant groove.

[0016] It can be seen that in the above technical solution, the cooperation between the protrusion and the shear groove can enhance the connection integrity of the steel unit.

[0017] According to the above technical solution, preferably, the lower end of the steel unit is fixedly connected to the column foot bottom plate.

[0018] According to the above technical solution, preferably, the upper and lower adjacent longitudinal steel bars are fixedly connected by a connecting sleeve.

[0019] The beneficial effects of the utility model are:

[0020] (1) The steel composite skeleton cable tower of this patent effectively combines the high strength of steel and the high stiffness of reinforced concrete, effectively improving the bearing capacity and anti-deformation performance of the cable tower, and performs well in mechanical properties, construction efficiency, and economic performance;

[0021] (2) The prefabricated skeleton components of this patent can reduce the time and difficulty of on-site construction, improve construction efficiency and economic benefits, and have great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the top view of the structure of the embodiment is shown;

[0023] Figure 2 A front view structural schematic diagram of a steel section unit in an embodiment is shown;

[0024] Figure 3 A schematic diagram of the top view of the structure of the hidden connecting steel frame of the embodiment is shown;

[0025] Figure 4 A front view structural schematic diagram of a connection assembly in an embodiment is shown;

[0026] Description of reference numerals:

[0027] 1. Steel composite frame; 2. Concrete; 3. Frame assembly; 4. Steel unit; 5. Transverse reinforcement; 6. Longitudinal reinforcement; 7. Connecting steel frame; 8. Connecting assembly; 9. Limiting piece; 10. Shear key; 11. Anchor bolt; 12. Leveling nut; 13. Column foot plate; 14. Fastening nut; 15. Shear groove; 16. Connecting sleeve; 17. Tower column segment. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0029] In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0030] As shown in the figure, the utility model provides a steel composite frame type cable tower, including a steel composite frame 1 and concrete 2 cast and wrapped around the steel composite frame 1, the steel composite frame 1 includes a plurality of prefabricated frame components 3 which are vertically fixed and spliced ​​in sequence, the frame component 3 is a closed rectangular structure, and the frame component 3 includes a plurality of vertically parallel arranged steel units 4, transverse steel bars 5, longitudinal steel bars 6 and connecting steel frames 7, the steel units 4 are fixedly connected to a group of cast tower column segments 17 through connecting components 8, the transverse steel bars 5 are fixedly connected to the steel units 4 through limiters 9, the longitudinal steel bars 6 are fixedly connected to the transverse steel bars 5, and the two ends of the connecting steel frames 7 are respectively fixedly connected to the upper parts of two adjacent groups of steel units 4, the cross section of the steel unit 4 is an I-shaped cross section, and shear keys 10 inserted into the concrete 2 are evenly arranged on the outer side of the flange of the steel unit 4, and the shear keys 10 can effectively improve the connection between the concrete 2 and the steel unit 4 The connection assembly 8 includes multiple groups of anchor bolts 11, leveling nuts 12, column base plates 13, washers and fastening nuts 14 from bottom to top. The main part of the anchor bolt 11 is buried in the upper part of the last group of cast tower column segments 17. The leveling nuts 12 are threadedly connected with the anchor bolts 11. The column base plates 13 are sleeved on the anchor bolts 11. The washers and fastening nuts 14 are sequentially inserted into the anchor bolts 11, and the fastening nuts 14 are screwed to the anchor bolts 11. 1 threaded connection, the main part of the anchor bolt 11 is buried in the upper part of the last group of cast tower column segments 17, then the leveling nut 12 is threadedly connected with the anchor bolt 11, and then the column foot plate 13 is sleeved on the anchor bolt 11, and finally the gasket and the fastening nut 14 are sequentially sleeved into the anchor bolt 11, so as to realize the assembly and positioning of the connection component 8. After the subsequent skeleton component 3 is hoisted in place, the lower end of the steel unit 4 is welded and fixedly connected with the column foot plate 13.

[0031] The steel composite frame type cable tower of this patent effectively combines the high strength of the steel and the high stiffness of reinforced concrete 2, effectively improving the bearing capacity and anti-deformation performance of the cable tower, and performs well in mechanical properties, construction efficiency, and economic performance. In addition, the prefabricated frame assembly 3 of this patent can reduce the time and difficulty of on-site construction, improve construction efficiency and economic benefits, and has great promotion value.

[0032] Optionally, in a possible embodiment, a shear groove 15 is provided on the upper end surface of the tower column segment 17 at the lower side of the column base plate 13, and a protrusion inserted into the shear groove 15 is provided on the lower end surface of the column base plate 13. The lower end of the steel unit 4 is fixedly connected to the column base plate 13, and the protrusion and the shear groove 15 cooperate to enhance the connection integrity of the steel unit 4.

[0033] Optionally, in a possible implementation manner, the upper and lower adjacent longitudinal steel bars 6 are fixedly connected via a connecting sleeve 16 .

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A steel composite frame type cable tower, characterized in that: It includes a steel composite skeleton and concrete cast to wrap the steel composite skeleton, the steel composite skeleton includes a plurality of prefabricated skeleton components which are vertically fixed and spliced ​​in sequence, the skeleton components are closed rectangular structures, the skeleton components include a plurality of vertically parallel arranged steel units, transverse steel bars, longitudinal steel bars and connecting steel frames, the steel units are fixedly connected to a group of cast tower column segments through connecting components, the transverse steel bars are fixedly connected to the steel units through limiting pieces, the longitudinal steel bars are fixedly connected to the transverse steel bars, and the two ends of the connecting steel frame are respectively fixedly connected to the upper parts of two adjacent groups of steel units.

2. The steel composite frame type cable tower according to claim 1, characterized in that: The cross section of the steel unit is an I-shaped cross section, and shear keys inserted into concrete are evenly arranged on the outer side of the flange of the steel unit.

3. The steel composite frame type cable tower according to claim 2, characterized in that: The connection assembly includes multiple groups of anchor bolts, leveling nuts, column base plates, washers and fastening nuts from bottom to top. The main part of the anchor bolts is buried in the upper part of the last group of cast tower column segments. The leveling nuts are threadedly connected to the anchor bolts. The column base plates are sleeved on the anchor bolts. The washers and fastening nuts are sequentially inserted into the anchor bolts, and the fastening nuts are threadedly connected to the anchor bolts.

4. The steel composite frame type cable tower according to claim 3, characterized in that: The upper end surface of the tower column segment is located at the lower side of the column foot bottom plate and is provided with a shearing groove, and the lower end surface of the column foot bottom plate is provided with a protrusion inserted into the shearing groove.

5. The steel composite frame type cable tower according to claim 4, characterized in that: The lower end of the steel unit is fixedly connected to the column foot bottom plate.

6. The steel composite frame type cable tower according to claim 1, characterized in that: The upper and lower adjacent longitudinal steel bars are fixedly connected by connecting sleeves.

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