Construction process of upper tower column of large space special-shaped steel tower cable-stayed bridge

Abstract

The invention discloses a construction process for an upper tower column of a cable-stayed bridge with a large spatial special-shaped steel tower. The construction process comprises the following steps: S1, constructing a middle tower bracket; s2, sequentially hoisting the sections; s3, the upper section is guided through the guide code plate of the lower section; s4, primary connection between every two adjacent sections is formed through a plug-in type fixing structure; s5, connection of every two adjacent sections is formed in a welding mode; and S6, the multiple sections are connected to form the upper tower column. And the manufacturing and mounting difficulty of the large space special-shaped upper tower column can be effectively reduced through the mode of splitting and recombining. The upper section is guided through the guide code plate, so that the adjusting difficulty in the falling process of the sections is effectively reduced, and the butt joint surfaces of the two adjacent sections can be completely overlapped. The segment is effectively prevented from displacement or deflection in the follow-up adjusting process through the plug-in type fixing structure, the accuracy degree of the line shape of the finally-formed upper tower column is ensured, and the shear capacity and the overall stress performance of the joint of the segment are further enhanced through the structure.

Description

Technical Field

[0001] This application relates to the field of construction technology for the upper tower columns of irregularly shaped cable-stayed bridges, and particularly to the construction process of the upper tower columns of large-scale spatial irregularly shaped steel tower cable-stayed bridges. Background Technology

[0002] The irregular cable-stayed bridge is a three-tower, double-cable-stayed bridge, with the towers, beams, and piers all rigidly connected to form a rigid frame system. The main beam and upper tower column are steel structures, the lower tower column is a concrete structure, and the fixed part between the tower and beam is a steel-concrete composite structure.

[0003] The irregularly shaped cable-stayed bridge is basically located within a circular curve with a radius of 350m and a length of 310m. All towers and piers are orthogonally arranged along the bridge axis. The longitudinal section of the bridge is located on a convex curve with a radius of 9000m, and longitudinal slopes of 1.65% and 1.9% on both sides, respectively. The bridge adopts a single-span layout, with a standard cross-sectional width of 32.5m, widening to 36.5m at the main tower, and a unidirectional cross slope of 3%.

[0004] To improve the appearance of the cable-stayed bridge and give the towers better rigidity and more reasonable cable force transmission, the upper tower of the irregular cable-stayed bridge has an arched shape along the transverse direction of the tower and an ellipse along the longitudinal direction of the tower; the lower tower has a circular curve along the transverse direction of the tower and a vertical longitudinal direction of the tower.

[0005] For irregularly shaped steel structure upper tower columns, existing construction processes often divide the upper tower column into multiple segments, which are then assembled into the upper tower column through hoisting and welding. During the hoisting process, the posture of the segments is adjusted using jacks and crawler cranes, which is difficult to do. Furthermore, the localized high temperatures generated during welding can cause thermal stress in the segments, which may lead to segment axis deflection. Wind loads and environmental factors may also cause segment axis deflection, resulting in abnormal alignment of the upper tower column. Abnormal alignment can lead to overall instability of the cable-stayed bridge and even the risk of collapse.

[0006] Therefore, it is necessary to propose a construction process for the upper tower columns of large-scale spatial irregular steel tower cable-stayed bridges and improve the accuracy of the upper tower column alignment, which has become an important technical problem that urgently needs to be solved. Summary of the Invention

[0007] This application provides a construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge, aiming to solve the problems of the difficulty in segment adjustment in the existing technology, and the fact that the local high temperature generated during welding can cause thermal stress in the segments. Thermal stress may cause segment axis deflection. Wind load and environmental factors may also cause segment axis deflection, resulting in abnormal alignment of the upper tower column. Abnormal alignment can lead to the overall instability of the cable-stayed bridge, and even the risk of collapse.

[0008] To achieve the above objectives, this application proposes a construction process for the upper tower column of a large spatial irregular steel tower cable-stayed bridge. The construction process includes the following steps: S1, constructing the middle tower support; S2, sequentially hoisting the segments, with the upper tower column comprising multiple segments; S3, guiding the upper segment using guide plates on the lower segment; S4, forming a preliminary connection between adjacent segments using a plug-in fixing structure; S5, forming a connection between adjacent segments using welding; S6, connecting multiple segments to form the upper tower column.

[0009] In some embodiments, the segments used in the construction process of the upper tower column include: a body; multiple longitudinal reinforcing ribs, with multiple longitudinal reinforcing ribs spaced apart on the inner wall of the body, and the longitudinal reinforcing ribs of adjacent segments being staggered; a guide plate, with a guide plate provided at the top of the outer wall of the body; a first guide surface, with the guide plate having a first guide surface; and a first mounting plate, with a first mounting plate provided at the bottom of the body, and the first mounting plate connecting multiple longitudinal reinforcing ribs.

[0010] In some embodiments, the segment further includes: a second mounting plate disposed near the top of the body; a plug disposed on the second mounting plate; a movable retaining ring disposed movably inside the plug, the movable retaining ring having a first engaging surface; a plug rod disposed on the first mounting plate; and a plug with a plug at the end of the plug rod, the plug and the plug rod forming a second engaging surface.

[0011] In some embodiments, the segment further includes: an elastic element, wherein the elastic element is disposed between the movable retaining ring and the insert; and an inner cylinder, wherein the inner cylinder is disposed on the insert, and the lower end of the inner cylinder abuts against the top end of the movable retaining ring.

[0012] In some embodiments, the segment further includes: a limiting post, which is movably disposed within the movable retaining ring; a limiting head, which is disposed at one end of the limiting post; and a first limiting nut, which is disposed at the other end of the limiting post.

[0013] In some embodiments, the segment further includes: a connecting rod that connects to a second mounting plate; a ball head that is provided at the end of the connecting rod; and a spherical surface that is provided on the insert to accommodate the ball head.

[0014] In some embodiments, the segment further includes: a locking tooth, wherein a locking tooth is provided on a first locking surface; and a locking groove, wherein a locking groove adapted to the locking tooth is provided on a second locking surface.

[0015] In some embodiments, the segment further includes: multiple positioning blocks, with positioning blocks disposed on the inner wall surface of the body, some positioning blocks abutting against the first mounting plate, and some positioning blocks abutting against the second mounting plate.

[0016] In some embodiments, the device further includes a resin filler, wherein the resin filler is disposed within the insert.

[0017] In some embodiments, the body further includes a welding bevel, wherein the bottom of the body is provided with a welding bevel.

[0018] This application proposes a construction process for the upper tower column of a large-scale spatial irregular steel tower cable-stayed bridge. The construction process includes the following steps: S1, erecting the middle tower support; S2, sequentially hoisting the segments, with the upper tower column comprising multiple segments; S3, guiding the upper segments using guide plates on the lower segments; S4, forming a preliminary connection between adjacent segments using a plug-in fixing structure; S5, connecting adjacent segments by welding; S6, connecting multiple segments to form the upper tower column. By dividing the large-scale spatial irregular upper tower column into multiple segments, and connecting these segments by welding, this method of disassembly and reassembly effectively reduces the manufacturing and installation difficulty of the large-scale spatial irregular upper tower column. Using guide plates to guide the upper segments effectively reduces the adjustment difficulty during segment descent and facilitates the complete overlap of the mating surfaces of adjacent segments. The plug-in fixing structure effectively prevents the segments from shifting or deflecting during subsequent adjustments, ensuring the accuracy of the final upper tower column shape. Furthermore, this structure enhances the shear resistance at the segment joints and the overall load-bearing performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a technical roadmap illustrating the construction process of the upper tower column of a large-scale spatial irregular steel tower cable-stayed bridge according to one embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the upper tower column in one embodiment of this application; Figure 3 This is a three-dimensional structural diagram of two connected segments in one embodiment of this application; Figure 4 for Figure 3 Enlarged view of part A in the middle; Figure 5 This is a cross-sectional view of two connected segments in one embodiment of this application; Figure 6 for Figure 5 Enlarged view of part B in the middle; Figure 7 This is a schematic diagram of the plug-socket connection structure in one embodiment of this application; Figure 8 for Figure 7Enlarged view of a section in the middle C; Figure 9 This is a three-dimensional structural diagram of a segment in one embodiment of this application; Figure 10 for Figure 9 A magnified view of part D in the middle.

[0021] In the diagram: Upper tower column 1, segment 11, body 111, guide plate 112, longitudinal reinforcing rib 113, guide cone surface 114, second mounting plate 115, insert 116, connecting plane 117, inner cylinder 118, first mounting plate 119, second limiting nut 1110, positioning block 1111, plug 1112, first guide surface 1113, spherical surface 1114, third limiting nut 1115, connecting rod 1116, ball head 1117, insert rod 1118, limiting head 1119, first limiting nut 1120, elastic element 1122, limiting post 1123, moving retaining ring 1124, second guide surface 1125, retaining tooth 1126, welding bevel 1127, welding joint 2, steel box girder 3, arc segment 4. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown in the figure, the construction process of the upper tower column 1 of the large spatial irregular steel tower cable-stayed bridge of this application is as follows: Specifically, the upper tower column 1 includes a middle tower and side towers. The middle tower and side towers have basically the same structure, but the side towers are smaller in volume than the middle towers. The upper tower column 1 is connected to the lower tower column through an arc segment 4. The arc segment 4 is connected to the embedded parts on the lower tower column by welding or other connection methods. After installation, concrete is poured to form a stable connection between the arc segment 4 and the lower tower column. The bottom segment 11 is connected to the arc segment 4 by welding. A steel box girder 3 is also set on the lower tower column. Before installing the steel box girder 3, a foundation support needs to be built. The steel box girder 3 is set on the pier. The steel box girder 3 includes multiple segments, which are connected by welding. The construction process of the upper tower column 1 includes the following steps: S1. Construct the central tower support structure; the central tower support structure uses steel pipes with an outer diameter of φ630*8mm as columns. The lower support of the steel box girder 3 rests on the pier abutment, and the upper support is welded to the steel box girder 3. The steel pipe columns are spaced 7m apart horizontally and approximately 3m apart longitudinally. Double I36A steel pipes are used for horizontal connections between each row of steel pipes, and 20 channel steel is used for diagonal cross-bracing (scissor bracing) to reinforce and increase the overall stability of the structure. H300 steel is installed on the side of the steel pipe columns as support for tower column segment 11, ensuring 112 support points for each segment. All the above structures are connected by welding. A construction operation platform is set 1.5m below each welded joint, surrounding the steel tower column. The platform is 1m wide and covered with steel planks with a height of 50mm, a width of 250mm, and a length of 2000mm. 12# channel steel is welded to the steel planks as bottom support, and the 12# channel steel is welded to the steel pipe columns.

[0024] S2. Segments 11 are hoisted sequentially. The upper tower column 1 consists of multiple segments 11. Each segment 11 is a variable cross-section box shape. To ensure aesthetic appeal, chamfers are provided at the four corners of the segment 11 cross-section, forming a "convex" shaped cross-section. Some segments 11 have cable anchorage zones, with a cable spacing of 2m on the side towers and 3m on the central tower. Adjacent segments 11 are connected by welding, and welded joints 2 are provided between adjacent segments 11, forming a stable connection.

[0025] S3. The upper segment 11 is guided by the guide plate 112 of the lower segment 11. To ensure the overlap of adjacent segments 11 at the docking point, guide plates 112 are welded to the outer side of the lower segment 11. The guide plates 112 are provided with a first guide surface 1113. When adjacent segments 11 are docked, the upper segment 11 falls under the action of the first guide surface 1113 on the guide plate 112. During the falling process, the tilt of the segment 11 is adjusted by jacks, crowbars, etc., so that the docking surfaces of adjacent segments 11 are almost completely overlapped, ensuring the accuracy of the final formed upper tower column 1 line. The setting of the guide plate 112 can effectively reduce the adjustment difficulty of the segment 11 during the falling process and facilitate the complete overlap of the docking surfaces of adjacent segments 11.

[0026] S4. A preliminary connection is formed between two adjacent segments 11 through a plug-in fixing structure; S6. Multiple segments 11 are connected to form the upper tower column 1. The plug-in fixing structure includes a plug 116 and a plug 1112. During the docking process of two adjacent segments 11, the plug 1112 is inserted into the plug 116 to form a connection between the plug 1112 and the plug 116, realizing rapid positioning and preliminary fixing between adjacent segments 11. The matching design of the plug 116 and the plug 1112 effectively prevents the segments 11 from shifting or deflecting during subsequent adjustments, ensuring the accuracy of the final upper tower column 1's shape. Furthermore, this structure enhances the shear resistance at the joints of the segments 11 and the overall load-bearing performance.

[0027] Specifically, the large, irregularly shaped upper tower column 1 is divided into multiple segments 11, which are then connected by welding to form the large, irregularly shaped upper tower column 1. This method of disassembly and reassembly effectively reduces the manufacturing and installation difficulty of the large, irregularly shaped upper tower column 1. The upper segments 11 are guided by guide plates 112, effectively reducing the adjustment difficulty during the descent of the segments 11 and facilitating the complete overlap of the mating surfaces of adjacent segments 11. The plug-in fixing structure effectively prevents displacement or deflection of the segments 11 during subsequent adjustments, ensuring the accuracy of the final shape of the upper tower column 1. Furthermore, this structure enhances the shear resistance at the joints of the segments 11 and the overall load-bearing capacity.

[0028] See Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 9 and Figure 10As shown, in some embodiments, the segment 11 used in the construction process of the upper tower column 1 includes: a body 111, which is formed by welding multiple steel plates. The body 111 is a variable cross-section box shape. To ensure the landscape effect, chamfers are provided at the four corners of the cross-section of the body 111 to form a "convex" shaped cross-section. The two sides of the body 111 are mounting surfaces where cable anchoring structures can be installed. Since the cable anchoring area is a mature existing technology and is not the core inventive point of this application, no specific restrictions are imposed on the cable anchoring structure here. Multiple longitudinal reinforcing ribs 113 are provided at intervals on the inner wall surface of the body 111. The longitudinal reinforcing ribs 113 of adjacent segments 11 are staggered. The setting of multiple longitudinal reinforcing ribs 113 can effectively enhance the structural strength and rigidity of the body 111. In addition, the longitudinal reinforcing ribs 113 can also effectively disperse the stress of the body 111 and improve the structural stability of the body 111. The longitudinal reinforcing rib 113 is a region with high local stiffness. The staggered arrangement of the longitudinal reinforcing ribs 113 between adjacent segments 11 can avoid significant stiffness abrupt changes at the connection, thereby preventing local buckling or deformation incoordination induced by stiffness abrupt changes. A guide plate 112 is installed at the top of the outer wall surface of the main body 111; a first guide surface 1113 is provided on the guide plate 112; guide plates 112 are welded to the outer side of the main body 111. When adjacent segments 11 are joined, the upper part of the main body 111 falls under the action of the first guide surface 1113 on the guide plate 112. During the falling process, the inclination of the segment 11 is adjusted by jacks, crowbars, etc., until the joint surfaces of adjacent segments 11 almost completely overlap, ensuring the accuracy of the final formed upper tower column 1's linear shape. The guide plate 112 effectively reduces the adjustment difficulty during the falling process of the segment 11 and facilitates the complete overlap of the joint surfaces of adjacent segments 11. A first mounting plate 119 is provided at the bottom of the body 111. The first mounting plate 119 connects multiple longitudinal reinforcing ribs 113 and is welded to the body 111. The first mounting plate 119 is used to effectively contact the longitudinal reinforcing ribs 113 on the lower segment 11, increasing the metal contact surface between adjacent segments 11 and significantly improving the load-bearing capacity and fatigue life at the connection of segments 11.

[0029] In this embodiment, the longitudinal reinforcing ribs 113 are spaced 40cm to 60cm apart. Preferably, transverse diaphragms are arranged along the normal direction of the axis of the body 111, with a spacing of 23cm between the transverse diaphragms. The thickness of the longitudinal reinforcing ribs 113 is 20 to 24mm. Generally, the thickness of the transverse diaphragms is 12mm, and the thickness of the transverse diaphragms at the cable is 20mm.

[0030] See Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, segment 11 further includes: a second mounting plate 115, which is disposed near the top of the body 111; the second mounting plate 115 connects the body 111 and the longitudinal reinforcing rib 113 by welding. Insert 116: Insert 116 is mounted on the second mounting plate 115. Movable retaining ring 1124: Movable retaining ring 1124 is movably mounted inside the insert 116. The movable retaining ring 1124 has a first engaging surface. The movable retaining ring 1124 includes four rings spaced circumferentially. The movable retaining ring 1124 has elasticity, allowing its inner diameter to shrink under the action of the elasticity. The bottom of the movable retaining ring 1124 forms the first engaging surface. Insert rod 1118: Insert rod 1118 is mounted on the first mounting plate 119. The insert rod 1118 is connected to the first mounting plate 119 by screwing. A second limiting nut 1110 is also screwed onto the insert rod 1118. The second limiting nut 1110 abuts against the first mounting plate 119, locking the position of the insert rod 1118 and preventing it from loosening. A plug 1112 is provided at the end of the insertion rod 1118, forming a second engaging surface between the plug 1112 and the insertion rod 1118. The plug 1112 and the insertion rod 1118 are integrally formed, but the cross-sectional area of ​​the plug 1112 at the connection point is larger than that of the insertion rod 1118 at the connection point. This difference in cross-sectional area forms the second engaging surface. The plug 1112 is spherical, and its cross-sectional area gradually decreases along the direction away from the insertion rod 1118. During the insertion of the plug 1112, the movable retaining ring 1124 is gradually expanded to allow the plug 1112 to be inserted into the insertion tube 116. After the connection point between the plug 1112 and the insertion rod 1118 passes the movable retaining ring 1124, the movable retaining ring 1124 shrinks under its own elastic force, thereby causing the first engaging surface to abut against the second engaging surface, achieving the connection between the plug 1112 and the insertion tube 116, and realizing the initial fixation between adjacent segments 11. The connection between the insert 116 and the plug 1112 can effectively prevent the body 111 from shifting or deflecting during subsequent adjustments, ensuring the accuracy of the final shape of the upper tower column 1. Furthermore, this structure enhances the shear resistance at the joints of the segments 11 and the overall stress performance.

[0031] In this embodiment, both the second mounting plate 115 and the first mounting plate 119 include a bearing area and a connecting area. The bearing area is used to connect the longitudinal reinforcing rib 113, and the bearing area of ​​the first mounting plate 119 can abut against the longitudinal reinforcing rib 113 of the lower body 111, increasing the metal contact surface between adjacent segments 11. Furthermore, the bearing area has the same structure as the transverse partition, which can effectively improve the structural rigidity of the body 111 and the longitudinal reinforcing rib 113, disperse the stress on the body 111 and the longitudinal reinforcing rib 113, and improve the structural stability of the body 111 and the longitudinal reinforcing rib 113. The connecting area is used to connect the plug 1112 or the socket 116. The force on the socket 116 and the plug 1112 can be transferred to the longitudinal reinforcing rib 113 and the body 111 through the bearing area, improving the stability of the socket 116 and the plug 1112, preventing the socket 116 and the plug 1112 from undergoing sudden positional changes under stress, and improving the reliability of the initial fixation of the socket 116 and the plug 1112 between adjacent segments 11.

[0032] In this structure, the longitudinal reinforcing ribs 113 on the four inner wall surfaces of the main body 111 are all connected to the first mounting plate 119 and the second mounting plate 115, and four plugs 1112 and inserts 116 are also correspondingly provided. The structures of the segments 11ZT1-ZT5 and ZT1A-ZT5A of the upper tower column 1 are all the same as those of the main body 1. Figure 3 The structure of segment 11 shown is similar, while ZT6 is provided with two first mounting plates 119, which are used to connect with the second mounting plate 115 at the top of ZT5 and ZT5A respectively.

[0033] The movable retaining ring 1124 has a second guide surface 1125 at its top. The structural design of the second guide surface 1125 allows the plug 1112 to effectively push open the movable retaining ring 1124. It can be understood that when the plug 1112 just passes the movable retaining ring 1124, the bodies 111 between the two adjacent segments 11 come into contact, and the pressure is borne by the bodies 111 between the two adjacent segments 11, while the pulling force is borne by the movable retaining ring 1124 and the plug 1112.

[0034] See Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, segment 11 further includes: an elastic element 1122, wherein the elastic element 1122 is disposed between the movable retaining ring 1124 and the insert 116, the elastic element 1122 being a high-strength spring, one end of the high-strength spring abutting against the movable retaining ring 1124, and the other end of the high-strength spring abutting against the inner wall surface of the insert 116, the high-strength spring providing elastic force to the movable retaining ring 1124, the high-strength spring being compressed during the insertion of the plug 1112, and the movable retaining ring 1124 resetting under the action of the high-strength spring after the connector of the plug 1112 passes over the bottom surface of the movable retaining ring 1124; and an inner cylinder 118, wherein an inner cylinder 118 is disposed on the insert 116, the lower end of the inner cylinder 118 abutting against the top end of the movable retaining ring 1124. The inner cylinder 118 is screwed to the insert 116. The plug 1112 is prevented from coming out of the insert 116 by the abutment between the inner cylinder 118 and the movable retaining ring 1124. The structural design of the inner cylinder 118 can greatly reduce the installation difficulty of the movable retaining ring 1124 and the elastic element 1122.

[0035] It is understandable that when the bodies 111 of two adjacent segments 11 abut against each other, the top of the inner cylinder 118 also abuts against the first mounting plate 119.

[0036] The inner cylinder 118 has an external hexagonal screw groove on its top outer circumferential surface, which facilitates the screwing of the inner cylinder 118 into the insert 116. The inner wall surface of the inner cylinder 118 is a guide cone surface 114, which can effectively guide the plug 1112. During the splicing process of two adjacent segments 11, the first guide surface 1113 on the guide plate 112 first guides the upper body 111 so that the plug 1112 can enter the inner cylinder 118. After the plug 1112 enters the inner cylinder 118, the first guide surface 1113 and the guide cone surface 114 jointly guide the body 111, reducing the difficulty of adjusting the body 111 and facilitating the complete overlap of the mating surfaces of two adjacent segments 11.

[0037] See Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, segment 11 further includes: a limiting post 1123, which is movably disposed within the movable retaining ring 1124; the movable retaining ring 1124 is provided with a corresponding guide hole, and the movement direction and stability of the movable retaining ring 1124 are limited by the cooperation of the limiting post 1123 and the guide hole. A limiting head 1119 is provided at one end of the limiting post 1123; the outer diameter of the limiting head 1119 is larger than that of the guide hole, and the setting of the limiting head 1119 can effectively prevent the movable retaining ring 1124 from dislodging from the movable retaining ring 1124; the end of the limiting head 1119 away from the movable retaining ring 1124 is provided with a rounded chamfer. A first limiting nut 1120 is provided at the other end of the limiting post 1123. The limiting post 1123 extends out of the insert 116, and the portion of the limiting post 1123 extending out of the insert 116 is screwed to the first limiting nut 1120. The first limiting nut 1120 is used to limit the inward retraction of the movable retaining ring 1124 and avoid interference between two adjacent movable retaining rings 1124 along the circumferential direction.

[0038] In this embodiment, four connecting planes 117 are provided circumferentially on the outer wall surface of the insert 116, and the limiting post 1123 extends from the four connecting planes 117 of the insert 116. The first limiting nut 1120 abuts against the corresponding connecting plane 117.

[0039] It is understandable that the structural design of the limiting post 1123, the limiting head 1119 and the first limiting nut 1120 allows the high-strength spring to be over-compressed so that the high-strength spring has sufficient restoring force and can effectively drive the moving retaining ring 1124 to reset.

[0040] See Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, segment 11 further includes: a connecting rod 1116, which connects to the second mounting plate 115; the connecting rod 1116 is screwed to the second mounting plate 115, and a third limiting nut 1115 is provided on the connecting rod 1116, which abuts against the second mounting plate 115 to ensure the positional stability of the connecting rod 1116 and prevent the connecting rod 1116 from loosening and causing the position of the insert 116 to deviate from expectations; a ball head 1117, which is provided at the end of the connecting rod 1116; and a spherical surface 1114, which is provided on the insert 116 to adapt to the ball head 1117. Through the cooperation of the ball head 1117 and the spherical surface 1114, the angle of the insert 116 can be adjusted within a large range. Because the first mounting plate 119 needs to abut against the reinforcing ribs of the lower body 111, and the insert 116 requires a certain amount of installation space, the position of the second mounting plate 115 is lower than the top surface of the body 111. This structural design results in the bottom surface of the first mounting plate 119 not being parallel to the top plate of the second mounting plate 115, while the insert rod 1118 is perpendicular to the bottom surface of the first mounting plate 119. Therefore, it is necessary to adjust the tilt of the insert 116 to make it parallel to the insert rod 1118, and then adjust the installation position of the connecting rod 1116 on the second mounting plate 115 so that the plug 1112 can be smoothly inserted into the insert 116. After the angle of the insert 116 is fully adjusted, the connection between the insert 116 and the ball head 1117 is formed by welding to ensure the stability of the angle of the insert 116.

[0041] Understandably, the preparatory work before the installation of segment 11 should include technical preparation, resource preparation, and site preparation. When the installation officially begins, all preparatory work should be thorough and in place. The installation of the upper tower column 1 requires high precision; before construction, the construction measurement control network should be re-measured and densified to ensure it meets the measurement precision requirements for component installation. It must not be used if it has not been re-measured or cannot meet the measurement precision requirements. For the installation process of the insert 116, plug 1112, and connecting rod 1116, necessary data such as the angle of the insert 116, the installation position of the connecting rod 1116, the minimum distance between the bottom surface of the insert 116 and the first mounting plate 119, and the distance between the plug 1112 and the second mounting plate 115 should be calculated in advance. The relevant data for different inserts 116 and plugs 1112 on the same body 111 need to be calculated independently and their accuracy verified through simulation or modeling tests. On-site process tests should be conducted when necessary.

[0042] See Figure 6 , Figure 7 and Figure 8As shown, in some embodiments, segment 11 further includes: a retaining tooth 1126, wherein the retaining tooth 1126 is provided on a first retaining surface; the retaining tooth 1126 includes multiple tooth bodies, each tooth body including a vertical surface and a conical surface connected to the vertical surface, and a retaining groove, wherein a retaining groove adapted to the retaining tooth 1126 is provided on a second retaining surface. The shape of the retaining groove is adapted to the retaining tooth 1126. During the resetting process of the movable retaining ring 1124, the conical surface structure design facilitates slight deformation of the movable retaining ring 1124 or the limiting post 1123, so that the movable retaining ring 1124 can be smoothly reset. After the movable retaining ring 1124 is reset, the vertical surface effectively prevents the movable retaining ring 1124 from retracting, so that the movable retaining ring 1124 can stably abut against the plug 1112.

[0043] See Figure 5 and Figure 6 As shown, in some embodiments, segment 11 further includes multiple positioning blocks 1111. Positioning blocks 1111 are disposed on the inner wall surface of the body 111. Some positioning blocks 1111 abut against the first mounting plate 119, and some positioning blocks 1111 abut against the second mounting plate 115. The positioning blocks 1111 are connected to the inner wall surface of the body 111 by welding. The positioning blocks 1111 are used to position the second mounting plate 115 and the first mounting plate 119, reducing the difficulty of positioning the second mounting plate 115 and the first mounting plate 119.

[0044] In some embodiments, the device further includes a resin filler, which is disposed within the insert 116. The resin filler is an alicyclic epoxy resin, and preferably also includes additives such as a latent curing agent, reactive liquid nitrile rubber, reactive diluent, and polymer wax powder. Just before adjacent segments 11 are about to be joined, the insert 116 is heated using a flame torch or similar means to melt the resin filler inside the insert 116, at which point the plug 1112 can be effectively inserted into the insert 116. The strong elastic force provided by the high-strength spring allows the movable retaining ring 1124 to smoothly reset under the resistance of the liquefied resin filler. First, the softened resin filler, being a malleable fluid, automatically fills all microscopic gaps and manufacturing tolerances between the plug 1112 and the socket 116, achieving a 100% perfect fit upon cooling. Second, the cured resin filler prevents the intrusion of moisture, dust, and corrosive gases, providing IP68 or higher level protection. After the socket 116 and plug 1112 are connected, the entire connection is solidified into a single unit by the resin filler, eliminating fretting wear. Third, the vibration load is evenly distributed, significantly improving high-cycle fatigue resistance and preventing loosening, abnormal noise, or breakage issues that may occur with traditional clips under long-term vibration. Finally, the pull-out force of the plug 1112 is converted into enormous shear and adhesive forces between the resin filler and the inner wall of the socket 116, as well as the compressive force of the interlocking structure formed by the resin and the clip. Furthermore, the stress is evenly distributed over a large area, resulting in low load per unit area. The resin filler also reinforces the socket 116, enhancing its local stiffness and crush resistance.

[0045] See Figure 3 , Figure 5 , Figure 6 , Figure 9 and Figure 10 As shown, in some embodiments, a welding bevel 1127 is also included, with the welding bevel 1127 provided at the bottom of the body 111. The welding bevel 1127 facilitates welding between adjacent bodies 111.

[0046] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. Construction technology of the upper tower column of a large-scale spatial irregular steel tower cable-stayed bridge, characterized in that, The construction process includes the following steps: S1. Construct the middle tower support structure; S2. The segments (11) are hoisted in sequence. The upper tower column (1) includes multiple segments (11). S3. Guide the upper segment (11) through the guide code plate (112) of the lower segment (11). S4. A preliminary connection is formed between two adjacent segments (11) through a plug-in fixing structure; S5. The connection between two adjacent segments (11) is formed by welding; S6. Multiple segments (11) are connected to form the upper tower column (1).

2. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 1, characterized in that, The segments (11) used in the construction process of the upper tower column (1) include: Ontology(111); Multiple longitudinal reinforcing ribs (113) are provided at intervals on the inner wall surface of the body (111), and the longitudinal reinforcing ribs (113) of two adjacent segments (11) are staggered. Guide code plate (112), the guide code plate (112) is provided at the top of the outer wall surface of the main body (111); The first guide surface (1113) is provided on the guide code plate (112). The first mounting plate (119) is disposed at the bottom of the body (111), and the first mounting plate (119) is connected to multiple longitudinal reinforcing ribs (113).

3. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 2, characterized in that, The segment (11) also includes: A second mounting plate (115) is disposed near the top of the body (111); Insert (116), the insert (116) is disposed on the second mounting plate (115); A movable retaining ring (1124) is movably disposed inside the insert (116), and the first retaining surface is disposed on the movable retaining ring (1124); Insert rod (1118), the insert rod (1118) is provided on the first mounting plate (119); The plug (1112) is provided at the end of the plug rod (1118), and a second snap-fit ​​surface is formed between the plug (1112) and the plug rod (1118).

4. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 3, characterized in that, The segment (11) also includes: Elastic element (1122), the elastic element (1122) is disposed between the movable retaining ring (1124) and the insert (116). Inner cylinder (118), the inner cylinder (118) is provided on the insert (116), and the lower end of the inner cylinder (118) abuts against the top end of the movable retaining ring (1124).

5. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 3, characterized in that, The segment (11) also includes: The limiting post (1123) is movably disposed within the movable retaining ring (1124). Limit head (1119), one end of the limit post (1123) is provided with the limit head (1119). The first limiting nut (1120) is provided at the other end of the limiting post (1123).

6. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 3, characterized in that, The segment (11) also includes: Connecting rod (1116), the connecting rod (1116) is connected to the second mounting plate (115); Ball head (1117), the end of the connecting rod (1116) is provided with ball head (1117). The insert (116) is provided with a spherical surface (1114) that is adapted to the ball head (1117).

7. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 3, characterized in that, The segment (11) also includes: The locking teeth (1126) are provided on the first locking surface. The second card contact surface is provided with a card slot adapted to the card teeth (1126).

8. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 3, characterized in that, The segment (11) also includes: Multiple positioning blocks (1111) are provided on the inner wall surface of the body (111). Some of the positioning blocks (1111) abut against the first mounting plate (119), and some of the positioning blocks (1111) abut against the second mounting plate (115).

9. The construction process for the upper tower column of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 3, characterized in that, Also includes: The resin filler is disposed inside the insert (116).

10. The construction process for the upper tower columns of a large-scale spatial irregular steel tower cable-stayed bridge according to claim 2, characterized in that, Also includes: Welding bevel (1127), the welding bevel (1127) is provided at the bottom of the body (111).

Images