Bridge space curved surface single-column special-shaped cable bent tower and construction method

Abstract

The bridge space curved surface single-column special-shaped cable bent tower comprises an oval bearing platform arranged at the top of a bridge tower foundation, a conical tower base is arranged at the bottom of the bearing platform, a lower tower column is arranged at the top of the tower base, the section of the joint of the bottom of the lower tower column and the tower base is round, and the section of the top of the lower tower column is in a round end shape. A middle tower column is arranged at the top of the lower tower column, the section of the joint of the middle tower column and the lower tower column is in a round end shape, the top section of the middle tower column is round, an upper tower column is arranged at the top of the middle tower column, and the section of the upper tower column is round and is gradually increased upwards from the bottom section to the top section of the upper tower column. A plurality of stay cables and auxiliary cables are arranged on the two sides of the upper tower column in the longitudinal direction of the bridge. By the adoption of the oval bearing platform and the tower base, the water blocking ratio of the bridge tower is reduced, the cable bent tower is designed to be round and round-end-shaped, the upper tower column is waisted and made into a fiber waist shape, the wind resistance coefficient is reduced, and the stability and safety of a bridge are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge structures, and more specifically, relates to a bridge spatial curved surface single-column special-shaped cable tower and a construction method. Background Art

[0002] Large-span bridges that cross canyons, bays, large rivers, and other areas mostly use structures such as cable-stayed bridges and suspension bridges. Cable-stayed bridges and suspension bridges are collectively called cable-structure bridges. Their structure consists of cables (stays), main beams, towers, foundations, and bridge decks. The bridge load is transmitted from the main beam to the cables (stays), and then from the cables to the towers. Therefore, the towers are important load-bearing components of the bridge structure and an important part of the bridge landscape.

[0003] Most cross-sea bridges are multi-tower structures with two or more towers. For cross-sea multi-tower cable-structured bridges, there are many towers, and the tower type should be simple; the force should be clear and reasonable, and avoid forced unified style, unified design elements, and consistent style. The towers used in multi-tower cable-stayed bridges include A-type towers, diamond-type towers, H-type towers, portal towers, and single-column towers. Except for single-column towers, the other forms of multi-tower cable towers will overlap from a spatial perspective. However, the existing towers are mostly rectangular or similar rectangular sections, and the appearance of the bridge is relatively dull and monotonous, which cannot meet the people's growing demand for landscape culture; the vertical stiffness of the middle span of multi-tower cable-stayed bridges is weak, and many projects increase the overall stiffness by increasing the cross-sectional size of the middle tower, which is not economical and has poor landscape quality; cross-river and cross-sea bridges need to be evaluated for flood control, among which the more important indicator is the water resistance ratio of the bridge structure. Conventional square and polygonal cable tower caps and tower bases have relatively large water resistance, and there is room for further optimization; from the perspective of wind load on the structure, the drag coefficient of conventional rectangular cross-sections is 1.1 to 2.1, which is relatively large. The drag coefficient of circular or round-end cross-sections is only 0.6; the tower crown is the finishing touch of the cable structure bridge. Setting the tower crown on the top of the cable tower of a large-span bridge, combined with landscape lighting, sightseeing and other needs, can improve the landscape effect while improving the local economic benefits. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a bridge space curved single-column special-shaped cable tower and construction method, by designing the cable tower shape into a circular and round-end shape, and the upper tower column is waisted to create a slim waist shape. The tower base is stable and solid, the tower column is dynamic and soft, and the tower top is set with an elegant and unique lighthouse shape, which is modern and fashionable, and has a prominent symbol; the tower crown unifies the landscape lighting with sightseeing, giving full play to the landscape value of the bridge. The multi-tower bridge across the river and the sea adopts this special-shaped cable tower, the design style is consistent, and the mutual echo fully demonstrates the beauty of rhythm. For the middle tower of the multi-tower cable-stayed bridge, by setting an auxiliary cable on the tower, the structural force is improved, and the overall stiffness of the bridge is improved by increasing the size of the cable tower by increasing a large amount of engineering, and the number of engineering is relatively saved. The elliptical abutment and tower seat are used to control the longitudinal bridge size and reduce the bridge water resistance ratio; the cable tower adopts a circular and round-end gradient section, which reduces the wind resistance coefficient and improves the stability and safety of the bridge.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, a bridge space curved single-column special-shaped cable tower is provided, comprising an elliptical cap disposed on the top of the bridge tower foundation, a conical tower base is disposed at the bottom of the cap, and a lower tower column is disposed at the top of the tower base; wherein,

[0006] The cross section of the lower tower column where the bottom meets the tower base is circular, and the cross section of the top is round-end shaped. A middle tower column is arranged on the top of the lower tower column, and the cross section of the middle tower column where it meets the lower tower column is round-end shaped, and the cross section of the top is circular. An upper tower column is arranged on the top of the middle tower column, and the cross section of the upper tower column is circular. Starting from the bottom cross section, the diameter gradually increases linearly with the increase of height. By designing the cable tower shape to be circular and round-end shaped, the wind resistance coefficient is reduced, and the stability and safety of the bridge are improved. The upper tower column forms a slim waist structure by waisting.

[0007] The upper tower column is provided with a plurality of cable stays on both sides along the longitudinal direction of the bridge. One end of the cable stays is fixedly connected to the bridge tower, and the other end is fixedly connected to the main beam. The cable stays transfer the load on the main beam to the bridge tower, and then from the bridge tower to the foundation, so that the cable-stayed bridge can span a larger span while keeping the structure light and beautiful.

[0008] Furthermore, the bridge tower also includes a plurality of auxiliary cables arranged on both sides of the top of the upper tower column in the longitudinal direction.

[0009] Furthermore, the cross-sectional shape of the abutment and the tower base is an ellipse, the major axis direction of which is consistent with the transverse direction of the bridge, and the minor axis direction is consistent with the longitudinal direction of the bridge.

[0010] Furthermore, the lower tower column, the middle tower column and the upper tower column are hollow structures.

[0011] Furthermore, a lower transverse partition is provided at the bottom of the hollow structure inside the lower tower column, and the lower transverse partition is in a cross shape.

[0012] Furthermore, a first middle transverse partition is provided at the junction of the lower tower column and the middle tower column, a second middle transverse partition is provided on the top of the first middle transverse partition, and a manhole is provided between the first middle transverse partition and the second middle transverse partition.

[0013] Furthermore, the wall thickness of the cross section at the lower tower column and the middle tower column is thickened in the longitudinal bridge direction.

[0014] Furthermore, an upper transverse partition is provided at the junction of the middle tower column and the upper tower column, a manhole is provided in the middle of the upper transverse partition, and a manhole for maintenance personnel to enter and exit is opened at the bottom of the middle tower column.

[0015] Furthermore, the tower crown is made of concrete material or steel-concrete composite material, and a glass curtain wall is provided on the outer side of the tower crown.

[0016] According to a second aspect of the present invention, a construction method for a bridge space curved single-column special-shaped cable tower is provided, comprising the following steps:

[0017] S100: Construction of bridge tower foundation, erection of brackets, installation of templates, tying of steel bars, construction of caps and tower bases;

[0018] S200: Set up the support, install the template of the first 5m section of the lower tower column, ensure that the size and shape of the template meet the design requirements, tie the steel bars in the template, pour concrete on the tied steel bars, and form the first 5m section of the lower tower column;

[0019] S300: Install a climbing formwork frame around the lower tower column, install a tower crane for hoisting formwork, steel bars and other construction materials, install a construction elevator, hoist the prefabricated formwork to a designated location, tie steel bars in the formwork, and pour concrete on the tied steel bars to form the next section of the cable tower;

[0020] S400: After the concrete reaches the designed strength, the formwork is demoulded from the solidified concrete segment, and the formwork is modified as necessary according to the design requirements of the next segment. The size of the climbing formwork frame platform is adjusted according to the size of the next segment, and the climbing formwork frame platform is raised to the construction position of the next segment by using the hydraulic system, and the formwork of this segment is installed, the steel bars are tied, and the concrete is poured;

[0021] S500: Repeat the steps of S400 until the cable tower reaches the designed height. After the construction of each section is completed, perform a quality inspection to ensure that the concrete strength and structural dimensions meet the design requirements.

[0022] S600: After the tower is capped, the tower crown will be constructed and a glass curtain wall will be installed on the outside of the tower crown.

[0023] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0024] 1. A bridge space curved single-column special-shaped cable tower of the present invention has a circular and round-end shape. The bottom cross section of the lower tower column 3 is circular, and the top cross section thereof is round-end shape. The bottom cross section of the middle tower column 4 is round-end shape, and the top cross section thereof is circular. From the bottom cross section of the upper tower column 5 to the top of the tower, the diameter gradually increases with the increase in height, forming an effect of gradually widening from bottom to top. The upper tower column is waisted to create a slim waist shape. The tower base is stable and solid, the tower column is dynamic and soft, and the tower top is set with an elegant and unique lighthouse shape, which is modern and fashionable, and has a prominent symbolic effect. The tower crown unifies landscape lighting with sightseeing, giving full play to the landscape value of the bridge. Multi-tower bridges across rivers and seas use this special-shaped cable tower, with consistent design styles and mutual echoes, fully demonstrating the beauty of rhythm.

[0025] 2. The present invention provides a bridge space curved single-column special-shaped cable tower. For the middle cable tower of a multi-tower cable-stayed bridge, the setting of auxiliary cables can significantly improve the overall stiffness of the bridge, and also strengthen the connection between the cable tower and the main beam, making the entire bridge structure more stable and reliable. Compared with the traditional method of increasing the stiffness by increasing the size of the cable tower, the setting of auxiliary cables can achieve the improvement of structural stiffness without significantly increasing the amount of engineering. This method is more economical, avoids large-scale civil engineering, and reduces the demand for materials and labor. It also enables the bridge to better resist various external loads, such as wind and earthquake, during long-term use, ensuring the safety and durability of the bridge.

[0026] 3. The present invention adopts an elliptical abutment and tower base to control the longitudinal dimension of the bridge, effectively reducing the water resistance ratio of the bridge, which not only improves the navigation capacity of the bridge, but also reduces the scouring of the bridge foundation by water flow, and enhances the stability of the bridge; the tower part adopts a circular and round-end gradient cross-section design, which is not only beautiful, but also effectively reduces the wind resistance coefficient, thereby improving the stress state of the bridge, and also reduces the vibration caused by wind, and improves the stability and safety of the bridge. The gradient cross-section design also makes the tower softer visually, forming a good transition and integration with the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the three-dimensional outer contour of a single-column special-shaped cable tower of a bridge space curved surface according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the inner contour of a bridge space curved surface single-column special-shaped cable tower according to an embodiment of the present invention;

[0029] Figure 3This is a cross-sectional view of a lower tower column of a bridge space curved single-column special-shaped cable tower according to an embodiment of the present invention;

[0030] Figure 4 This is a cross-sectional view of a middle tower column of a bridge space curved single-column special-shaped cable tower according to an embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional view of an upper tower column of a bridge space curved single-column special-shaped cable tower according to an embodiment of the present invention;

[0032] Figure 6 The present invention is a schematic flow chart of a construction method for a bridge spatial curved surface single-column special-shaped cable tower according to an embodiment of the present invention.

[0033] In all the drawings, the same figure marks represent the same technical features, specifically: 1-base, 2-tower base, 3-lower tower column, 4-middle tower column, 5-upper tower column, 6-tower crown, 7-lower cross diaphragm, 8-first middle cross diaphragm, 9-second middle cross diaphragm, 10-upper cross diaphragm, 11-cable, 12-auxiliary cable. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0038] Example 1

[0039] like Figure 1-5As shown, an embodiment of the present invention provides a bridge space curved single-column special-shaped cable tower, for the side tower of a multi-tower cable-stayed bridge, including a cap 1 arranged on the top of the bridge tower foundation, the cap 1 is elliptical in shape, and its main function is to bear and transfer the load of the bridge tower to the foundation, its major axis direction is consistent with the transverse direction of the bridge, and its minor axis direction is consistent with the longitudinal direction of the bridge, and a conical tower seat 2 is arranged at the bottom of the cap, and its cross-section is elliptical, and its function is to ensure that the internal force of the main tower column is evenly transmitted to the cap, improve the force effect of the cap, and the setting of the tower seat makes the load transfer of the cap and the reaction force distribution of the pile foundation more uniform, which is helpful to improve the overall performance and Durability; A lower tower column 3 is provided on the top of the tower base 2, and the cross-section of the bottom of the lower tower column 3 where it connects with the tower base 2 is circular, and the cross-section of the top is round-end shaped; a middle tower column 4 is provided on the top of the lower tower column 3, and the cross-section of the middle tower column 4 where it connects with the lower tower column 3 is round-end shaped, and the cross-section of the top is circular; an upper tower column 5 is provided on the top of the middle tower column 4, and from the bottom cross-section of the upper tower column 5 to the top of the tower, this part of the tower column adopts a circular cross-section design, and the diameter of this circular cross-section is not fixed, but starting from the bottom cross-section, the diameter gradually increases with the increase of height, forming an effect of gradually widening from bottom to top. In this process, the diameter change of the circular cross-section is linear; a crown 6 is provided on the top of the upper tower column 5, and the crown 6 is made of concrete material or steel-concrete composite material, and a glass curtain wall can be arranged on the outside of the crown; the spatial curved single-column special-shaped cable tower of the present invention, the pedestal 1 is designed to be elliptical, and its major axis direction is consistent with the transverse direction of the bridge, and the minor axis direction is consistent with the longitudinal direction of the bridge, which controls the longitudinal bridge dimension, reduces the water resistance ratio of the bridge, and helps to more effectively bear and transfer the load of the bridge tower to the foundation, and the setting of the conical tower base 2 ensures that the internal force of the main tower column can be evenly transmitted to the pedestal, improves the force effect of the pedestal 1, and makes the load transfer of the pedestal 1 and the pile foundation reaction force distribution more uniform, thereby improving the overall performance and durability of the structure; the bottom cross-section of the lower tower column 3 is circular, and the top cross-section is round-end shaped. This design helps to provide sufficient bearing capacity at the bottom of the tower column and gradually transition to a more complex shape; the cross-section of the middle tower column 4 at the junction of the lower tower column 3 is round-end shaped, and the top cross-section is circular. This change not only ensures the stability of the structure, but also achieves a smooth transition of the shape.Starting from the bottom section, the diameter of the upper tower column 5 gradually increases, forming an effect of gradually widening from bottom to top. This linear change not only enhances the bearing capacity of the tower column, but also gives the tower column a unique visual effect. The cable tower adopts a circular and round-end gradient section to reduce the drag coefficient, thereby improving the force and saving engineering workload. The upper tower column is waisted to create a slim waist shape, which increases the aesthetics of the bridge tower; the tower crown 6 is made of concrete material or steel-concrete composite material to ensure the strength and stability of the structure. A glass curtain wall can be set on the outside of the tower crown 6. This design not only makes the bridge more beautiful and modern visually, but also enhances the artistic and three-dimensional sense of the building. The transparent and smooth characteristics of the glass curtain wall can reflect and refract light, and are closely integrated with other parts of the bridge to form a unified whole.

[0040] The lower tower column 3, the middle tower column 4, and the upper tower column 5 are hollow structures, and assembled ladders are arranged inside the lower tower column 3, the middle tower column 4, and the upper tower column 5; the hollow structure of the tower column can reduce the dead weight of the tower column while maintaining the strength and rigidity of the structure, thereby optimizing the structural performance of the entire bridge cable tower; the assembled ladder provides a safe and reliable vertical traffic channel inside the hollow tower column, and construction personnel can conveniently go up and down the tower column by climbing the ladder to carry out equipment installation, maintenance or inspection and other work.

[0041] like Figure 2-3 As shown, a lower diaphragm 7 is provided at the bottom of the hollow structure inside the lower tower column 3, and the lower diaphragm 7 is in a cross shape. The cross shape of the lower diaphragm 7 helps to improve the force transmission at the connection between the tower bottom and the tower base 2, can more effectively disperse and transfer the load, reduce stress concentration, and improve the stability and safety of the structure. The cross-shaped lower diaphragm 7 increases the lateral stiffness of the tower column, which can improve the seismic performance of the entire bridge. The hollow structure cooperates with the internal diaphragm to improve the seismic performance of the tower column, because the diaphragm can withstand the horizontal component of the tower wall caused by the slope change, thereby enhancing the overall stability of the structure.

[0042] Furthermore, a first middle transverse diaphragm 8 is provided at the junction of the lower tower column 3 and the middle tower column 4, a second middle transverse diaphragm 9 is provided on the top of the first middle transverse diaphragm 8, a manhole is provided between the first middle transverse diaphragm 8 and the second middle transverse diaphragm 9, and a manhole for maintenance personnel to enter the tower is provided on the tower wall of the middle tower column 3. The provision of the first middle transverse diaphragm 8 and the second middle transverse diaphragm 9 helps to enhance the structural stress of the tower column at the junction, especially when bearing lateral loads, can improve the bending and torsion resistance of the tower column, help to disperse and transfer the load inside the tower column, reduce the impact of natural disasters such as earthquakes on the structure, and improve the seismic performance of the entire bridge. The transverse diaphragm increases the lateral stiffness of the tower column, helps to resist wind loads and other lateral forces, and improves the overall stiffness of the structure. The setting of the diaphragm helps to optimize the force distribution inside the tower column, reduce local stress concentration, and extend the service life of the bridge; the setting of the manhole provides a safe access channel for maintenance personnel, and is convenient for construction personnel to carry out operations inside the tower column, such as steel bar binding, formwork installation and concrete pouring, making subsequent maintenance and inspection work more convenient, and maintenance personnel can easily enter the tower column for inspection and necessary maintenance work.

[0043] Furthermore, an upper diaphragm 10 is provided at the junction of the middle tower column 4 and the upper tower column 5, and a manhole is provided in the middle of the upper diaphragm 10. The upper diaphragm 10 helps to enhance the structural stability of the junction of the middle tower column 4 and the upper tower column 5, especially when bearing lateral loads, it can improve the bending and torsional resistance of the tower column. The diaphragm is provided at the point where the cross-section slope changes, which can withstand the horizontal component of the tower wall caused by the slope change, reduce the stress concentration of the tower column caused by the slope change, and improve the safety and durability of the structure. The provision of the diaphragm increases the lateral stiffness of the tower column, helps to resist wind loads and other lateral forces, and improves the overall stiffness of the structure. The manhole provided in the middle of the upper diaphragm 10 provides a passage for construction personnel to enter the tower, which is convenient for operations during construction and subsequent maintenance and overhaul work.

[0044] Furthermore, the transverse cross-sections of the lower tower column and the middle tower column are thickened. The thickened cross-section can more effectively disperse and transfer the load, reduce stress concentration, and improve the rigidity and strength of the cable tower.

[0045] Furthermore, the upper tower column 5 is provided with a plurality of inclined cables 11 on both sides along the longitudinal direction of the bridge, one end of the inclined cables 11 is fixedly connected to the bridge tower, and the other end is fixedly connected to the main beam. The inclined cables 11 transfer the load on the main beam to the bridge tower, and then from the bridge tower to the foundation, so that the cable-stayed bridge can span a larger span while maintaining the lightness and beauty of the structure.

[0046] Example 2

[0047] The embodiment of the present invention provides another bridge space curved single-column special-shaped cable tower. In this embodiment, other contents are the same as those in embodiment 1, except that: for the middle cable tower of a multi-tower cable-stayed bridge, a plurality of auxiliary cables 12 can be provided on the top of the upper tower column 5 according to the force requirements, one end of which is fixedly connected to the bridge tower, and the other end is fixedly connected to the transverse connection box of the main beam. Reasonable arrangement of the auxiliary cables 12 can greatly improve the vertical stiffness of the multi-tower cable-stayed bridge. By adding the auxiliary cables 12, the stress state of the cable-stayed cable can be adjusted and optimized to make the bridge structure more reasonable. The setting of the auxiliary cables 12 can also increase the overall stiffness of the cable system, improve the mechanical damping and pneumatic damping of the bridge, and thus enhance the overall performance of the bridge. The auxiliary cables 12 work together with the cable-stayed cables 11 to form a more stable structural system, enhance the overall performance of the bridge, and improve the bearing capacity and seismic performance of the bridge. The setting of the auxiliary cables 12 helps to improve the safety of the bridge, especially under extreme weather and geological conditions. This helps to ensure the normal operation of the bridge and the safety of driving. By optimizing the stress state of the inclined cable and enhancing the overall rigidity of the cable system, the auxiliary cable 12 helps to extend the service life of the bridge. This helps to reduce the maintenance and replacement costs of the bridge and improve the economic benefits of the bridge. The setting of the auxiliary cable 12 can also improve the aesthetics of the bridge to a certain extent. Through reasonable arrangement and design, the structure of the bridge can be made more symmetrical and coordinated, thereby enhancing the visual effect of the bridge.

[0048] Example 3

[0049] Combination Figure 1-5 ,like Figure 6 As shown, the present invention provides a construction method for a bridge space curved surface single-column special-shaped cable tower, comprising the following steps:

[0050] S100: Construction of bridge tower foundation, erection of brackets, installation of templates, tying of steel bars, construction of cap 1 and tower base 2;

[0051] S200: Setting up the support, installing the template of the first 5m section of the lower tower column 3, ensuring that the size and shape of the template meet the design requirements, tying steel bars in the template, pouring concrete on the tied steel bars, and forming the first 5m section of the lower tower column;

[0052] S300: Install a climbing formwork frame around the lower tower column 3, install a tower crane for hoisting the formwork, steel bars and other construction materials, install a construction elevator, hoist the prefabricated formwork to a designated location, tie steel bars in the formwork, and pour concrete on the tied steel bars to form the next section of the cable tower;

[0053] S400: After the concrete reaches the designed strength, the formwork is demoulded from the solidified concrete segment, and the formwork is modified as necessary according to the design requirements of the next segment. The size of the climbing formwork frame platform is adjusted according to the size of the next segment, and the climbing formwork frame platform is raised to the construction position of the next segment by using the hydraulic system, and the formwork of this segment is installed, the steel bars are tied, and the concrete is poured;

[0054] S500: Repeat the steps of S400 until the cable tower reaches the designed height. After the construction of each section is completed, perform a quality inspection to ensure that the concrete strength and structural dimensions meet the design requirements.

[0055] S600: After the tower is capped, the construction of the tower crown 6 is carried out and the glass curtain wall is installed on the outside of the tower crown.

[0056] The construction method of the present invention can reduce the time of disassembly and reinstallation of the formwork by using the climbing formwork technology, speed up the construction progress, and the quality inspection after each section is completed is helpful to timely discover and correct problems and avoid the accumulation of structural defects. The modification of the formwork and the adjustment of the climbing formwork frame platform ensure that each section can accurately meet the design requirements and avoid size deviation and shape distortion. The modification and reuse of the formwork reduces the formwork cost and improves the resource utilization rate. The flexibility of the construction steps and the modifiability of the formwork enable the construction method to adapt to the construction needs of cable towers of different shapes and sizes. The climbing formwork construction reduces the dependence on ground facilities, making the construction more flexible and adaptable to different construction environments.

[0057] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge space curved surface single column special-shaped cable tower, characterized in that: It comprises an elliptical support platform (1) arranged at the top of the bridge tower foundation, a conical tower base (2) is arranged at the bottom of the support platform, and a lower tower column (3) is arranged at the top of the tower base (2); wherein: The cross section of the lower tower column (3) where the bottom part connects with the tower base (2) is circular, and the cross section of the top part is round-end-shaped. A middle tower column (4) is arranged on the top of the lower tower column (3). The cross section of the middle tower column (4) where it connects with the lower tower column (3) is round-end-shaped, and the cross section of the top part is circular. An upper tower column (5) is arranged on the top of the middle tower column (4). The cross section of the upper tower column (5) is circular. Starting from the bottom cross section, the diameter gradually increases linearly with the increase of height. By designing the outer shape of the cable tower to be circular and round-end-shaped, the wind resistance coefficient is reduced, and the stability and safety of the bridge are improved. The upper tower column is waisted to form a slim waist shape structure. The upper tower column (5) is provided with a plurality of inclined cables (11) on both sides along the longitudinal direction of the bridge. One end of the inclined cables (11) is fixedly connected to the bridge tower, and the other end is fixedly connected to the main beam. The inclined cables (11) transfer the load on the main beam to the bridge tower, and then from the bridge tower to the foundation, so that the cable-stayed bridge can span a larger span while maintaining the lightness and beauty of the structure.

2. The bridge space curved single-column special-shaped cable tower according to claim 1, characterized in that: The bridge tower also includes a plurality of auxiliary cables (12) arranged on both sides of the top of the upper tower column (5) in the longitudinal direction.

3. The bridge space curved single-column special-shaped cable tower according to claim 1, characterized in that: The cross-sectional shape of the cap (1) and the tower base (2) is an ellipse, the major axis direction of which is consistent with the transverse direction of the bridge, and the minor axis direction is consistent with the longitudinal direction of the bridge.

4. The bridge space curved single-column special-shaped cable tower according to claim 1, characterized in that: The lower tower column (3), the middle tower column (4) and the upper tower column (5) are hollow structures.

5. A bridge space curved single-column special-shaped cable tower according to any one of claims 1 to 4, characterized in that: A lower transverse partition (7) is provided at the bottom of the hollow structure inside the lower tower column (3), and the lower transverse partition (7) is in a cross shape.

6. A bridge space curved single-column special-shaped cable tower according to any one of claims 1 to 4, characterized in that: A first middle transverse partition (8) is arranged at the junction of the lower tower column (3) and the middle tower column (4), a second middle transverse partition (9) is arranged on the top of the first middle transverse partition (8), and a manhole is arranged between the first middle transverse partition (8) and the second middle transverse partition (9).

7. A bridge space curved single-column special-shaped cable tower according to any one of claim 6, characterized in that: The wall thickness of the cross section at the lower tower column (3) and the middle tower column (4) is thickened in the longitudinal direction of the bridge.

8. A bridge space curved single-column special-shaped cable tower according to any one of claims 1 to 4, characterized in that: An upper transverse partition (10) is arranged at the junction of the middle tower column (4) and the upper tower column (5), a manhole is arranged in the middle of the upper transverse partition (10), and a manhole for maintenance personnel to enter and exit is opened at the bottom of the middle tower column (4).

9. A bridge space curved single-column special-shaped cable tower according to any one of claims 1 to 4, characterized in that: The tower crown (6) is made of concrete material or steel-concrete composite material, and a glass curtain wall is provided on the outer side of the tower crown (6).

10. A construction method for a bridge space curved single-column special-shaped cable tower as claimed in any one of claims 1 to 9, characterized in that: The steps include: S100: construct the bridge tower foundation, set up the support, install the template, tie the steel bars, and construct the cap (1) and the tower base (2); S200: Setting up a support, installing the template of the first 5 m section of the lower tower column (3), ensuring that the size and shape of the template meet the design requirements, tying steel bars in the template, and pouring concrete on the tied steel bars to form the first 5 m section of the lower tower column; S300: Install a climbing formwork frame around the lower tower column (3), install a tower crane for hoisting the formwork, steel bars and other construction materials, install a construction elevator, hoist the prefabricated formwork to a designated location, tie steel bars inside the formwork, and pour concrete on the tied steel bars to form the next section of the cable tower; S400: After the concrete reaches the designed strength, the formwork is demoulded from the solidified concrete segment, and the formwork is modified as necessary according to the design requirements of the next segment. The size of the climbing formwork frame platform is adjusted according to the size of the next segment, and the climbing formwork frame platform is raised to the construction position of the next segment by using the hydraulic system, and the formwork of this segment is installed, the steel bars are tied, and the concrete is poured; S500: Repeat the steps of S400 until the cable tower reaches the designed height. After the construction of each section is completed, perform a quality inspection to ensure that the concrete strength and structural dimensions meet the design requirements. S600: After the cable tower is capped, the tower crown (6) is constructed and a glass curtain wall is installed on the outer side of the tower crown.

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