Complex linear steel-concrete composite arch bridge tower and construction method

Abstract

The present application relates to a kind of complex linear steel concrete combination arch bridge tower and construction method, including bearing platform, standardization steel wood combination formwork, steel tower column linear precision control system, first section steel tower column guide frame and multistage steel pipe lattice column support support system;Standardization steel wood combination formwork is located on bearing platform, for pouring heterotypic concrete lower tower column, steel pipe lattice column support support system is used to control the gradient of steel tower column section, and steel tower column linear precision control system is used for steel tower column pre-assembled.The beneficial effects of the present application are: heterotypic concrete lower tower column adopts standardization steel wood combination formwork system, round arc steel formwork is provided with bolt and wood formwork insertion hole quick docking, utilizes connecting plate to be quickly connected by connecting screw rod, improves the installation efficiency of steel wood combination formwork;Adopt steel tower column linear precision control technology, guarantees the pre-assembled effect and linear control of steel tower column.

Description

Technical Field

[0001] This invention belongs to the field of arch bridge towers, and particularly relates to a complex linear steel-concrete composite arch bridge tower and its construction method. Background Technology

[0002] In recent years, steel-concrete composite bridge towers have been increasingly widely used in cable-stayed bridges due to their superior load-bearing performance and aesthetically pleasing design. Simultaneously, with the continuous development of bridge technology in my country, more and more cable-stayed bridge constructions are adopting complex linear steel-concrete composite arch bridge towers, which places higher demands on the quality control of cable-stayed bridge construction. However, the formwork system for irregularly shaped concrete tower columns is complex, and the positioning and welding accuracy requirements for the first steel tower column are high during the construction of steel-concrete composite arch bridge towers, making linear control of the steel tower columns difficult. Furthermore, as the number of installed steel tower columns increases, deformation is prone to occur. Therefore, it is crucial to develop a construction process for steel-concrete composite arch bridge towers that achieves high construction efficiency and quality. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a complex linear steel-concrete composite arch bridge tower and its construction method.

[0004] This complex linear steel-concrete composite arch bridge tower includes a pier cap, standardized steel-wood composite formwork, a linear precision control system for steel tower columns, a guide frame for the first section of the steel tower column, and a multi-level steel pipe lattice column support system.

[0005] The standardized steel-wood composite formwork is set on the pier and used to pour the irregular concrete lower tower column. The top of the irregular concrete lower tower column is equipped with a bridge deck, and the bridge deck is equipped with a steel-concrete composite section.

[0006] The steel tower column consists of multiple segments. The first steel tower column segment is fixed on the steel-concrete composite section, and a guide frame for the first steel tower column segment is provided on one side. The steel pipe lattice column support system includes a steel pipe lattice column support frame, which is connected to the steel tower column segment through splicing blocks. The gradient of the steel tower column segment is controlled by adjusting the splicing length of the splicing blocks.

[0007] A linear precision control system for steel tower columns is used for the pre-assembly of steel tower columns.

[0008] Preferably, the standardized steel-wood composite formwork is fitted to the dimensions of the irregularly shaped concrete lower tower column. The standardized steel-wood composite formwork includes a first inner wooden formwork, an arc-shaped steel formwork, a second inner wooden formwork, and an outer wooden formwork. The outer wooden formwork is fixed to the second inner wooden formwork by tie rods. The arc-shaped steel formwork is provided with an arc-shaped stiffening plate, and pins are welded to both ends of the arc-shaped stiffening plate, which are respectively inserted into the insertion holes of the first inner wooden formwork and the second inner wooden formwork. Several connecting bolts are provided at the ends of the arc-shaped steel formwork through connecting plates. The ends of the first inner wooden formwork and the second inner wooden formwork are also provided with connecting plates, and positioning holes are provided on the connecting plates. The connecting bolts pass through the positioning holes and are fastened by nuts. A formwork support system for the first inner wooden formwork is provided on the foundation.

[0009] Preferably, the first section of the steel tower column guide frame includes a column, which is placed on the steel-concrete composite section. A collection box is provided on the back side of the column, and a pressure block is installed inside the collection box. A spring is connected to the upper part of the pressure block, and a screw rod is fixed to the lower part. The pressure block is connected to a support crossbar through a sleeve. The other end of the support crossbar is fixed to a support diagonal bar. A fixing plate is provided at the bottom of the diagonal bar, and the fixing plate is fixed to the bridge deck by bolts. A pressure block is provided at the bottom of the screw rod. A guide rail is installed on the front side of the column, and a guide block matching the guide rail is provided on the first section of the steel tower column. The guide block is placed inside the guide rail.

[0010] Preferably, the steel pipe lattice column support frame includes steel pipe columns and splicing blocks, with the steel pipe columns connected by flanges; adjacent steel pipe columns are welded together; connecting sleeves are installed on the steel pipe columns, and the splicing blocks are connected by insert fastening blocks and connecting sleeves; both ends of the splicing blocks are respectively provided with insert fastening columns and insert fastening holes, and adjacent splicing blocks are spliced ​​by inserting fastening columns into the insert fastening holes; connecting sleeves are symmetrically arranged on the steel tower columns, and the connecting sleeves on the steel tower columns are also bolted to the insert fastening blocks on the splicing blocks, forming a multi-level steel pipe lattice column support system with different gradients; an operating platform is also installed on the steel pipe lattice column support system.

[0011] The construction method for this complex linear steel-concrete composite arch bridge tower includes the following steps:

[0012] Step 1, Lower Tower Column Formwork Engineering: Erect prefabricated steel and wood composite formwork on the pier, pour irregular concrete for the lower tower column, and set up the bridge deck;

[0013] Step 2, Construction of the steel-concrete composite section: Pour the steel-concrete composite section on the bridge deck.

[0014] Step 3: Pre-assembly of steel tower columns: The steel tower columns are pre-assembled on the horizontal plane using a linear precision control system. The top and bottom of the steel tower columns are connected by bolts. At the same time, a lateral positioning device is also set up to position the steel tower columns laterally.

[0015] Step 4: Installation of the first steel tower column: Set up a guide frame for the first steel tower column on the steel-concrete composite section, place the first steel tower column along the guide frame on the steel-concrete composite section and weld it;

[0016] Step 5: Segmented installation of steel tower columns: The steel tower columns are installed in segments, and a multi-level steel pipe lattice column support system is set up to resist the deformation of the steel tower columns.

[0017] As a preferred embodiment, the linear precision control system for the steel tower column includes a pressure plate and a beam transport flatcar. The pressure plate is equipped with a directional moving track, and the beam transport flatcar is placed within the directional moving track of the pressure plate. A lifting system is installed on the pressure plate, and the base of the lifting system is fixed to the pressure plate through right-angle connectors. A jack is installed above the base, and a support pier is connected to one side of the jack through a fixed track to serve as auxiliary support in case of jack failure. The support pier is welded with a positioning block, which is connected to the fixed track. A through-type hydraulic cylinder is installed at the top and bottom of the steel tower column, and a screw is installed between the through-type hydraulic cylinders. The screw is fixed to the steel tower column through a hanging foot.

[0018] Preferably, a lateral positioning device is also provided on the adjacent end faces of the steel tower columns. The lateral positioning device includes a fixing block, and the two fixing blocks are respectively connected to the ends of the two steel tower columns through an arc-shaped connecting plate. A telescopic insert and an infrared receiver are provided in the middle of one fixing block, and a positioning groove with a rubber pad and an infrared transmitter are provided in the middle of the other fixing block. When the steel tower columns approach each other and reach a certain distance under the action of the through-hole hydraulic cylinder, the infrared transmitter transmits a command to the infrared receiver, causing the insert to move forward gradually and close in the positioning groove.

[0019] As a preferred option, in step five, after the steel tower columns are installed in sections, temporary cross bracing is installed between the steel tower columns on both sides.

[0020] The beneficial effects of this invention are:

[0021] 1) The present invention adopts a standardized steel-wood composite formwork system for irregular concrete lower tower columns. The arc-shaped steel formwork is equipped with pins that can be quickly connected to the wooden formwork through the insertion holes. The connecting plates are used to quickly connect and fasten the formwork with connecting bolts, which improves the installation efficiency of the steel-wood composite formwork.

[0022] 2) This invention adopts linear precision control technology for steel tower columns. During the pre-assembly of steel tower columns, a horizontal pre-assembly frame is used. The vertical position is adjusted by the jacking system, and the horizontal positioning device is used for precise positioning. A moving track is set to control the horizontal displacement of the beam transport flatcar, which ensures the pre-assembly effect and linear control of the steel tower columns.

[0023] 3) This invention sets up a guide frame for the first steel tower column. The operator applies an upward pushing force to the pressure block and uses the elastic force of the spring to adjust the support angle of the support diagonal bar and the support crossbar. The guide rail is set up to ensure that the first steel tower column is accurately positioned. The operation is simple and convenient, which improves the installation efficiency and quality of the steel tower column.

[0024] 4) This invention sets up a multi-level steel pipe lattice column support system. The steel pipe columns are flexibly extended by flanges, and the splicing blocks are quickly extended by insert fastening columns and insert fastening holes to form a multi-level and multi-gradient support system. At the same time, an operating platform can also be installed on the steel pipe lattice column support system to facilitate temporary operation and construction by workers, thereby improving the construction speed of steel tower columns. Attached Figure Description

[0025] Figure 1 It is a plan view of a complex linear steel-concrete composite arch bridge tower;

[0026] Figure 2 This is a plan view of a standardized steel-wood composite formwork system for the lower concrete tower column;

[0027] Figure 3 This is a structural diagram of the arc-shaped steel formwork and the wooden formwork;

[0028] Figure 4 This is a schematic diagram of the connection between the arc-shaped steel formwork and the wooden formwork;

[0029] Figure 5 This is a front view of a horizontal pre-assembled frame;

[0030] Figure 6 This is a top view of the horizontal pre-assembled frame;

[0031] Figure 7 This is a schematic diagram of the lifting system;

[0032] Figure 8 This is a schematic diagram of the lateral positioning device;

[0033] Figure 9 This is a schematic diagram of the front structure of the first section of the steel tower column guide frame;

[0034] Figure 10 This is a schematic diagram of the rear structure of the first steel tower column guide frame;

[0035] Figure 11 This is a plan view of the installation of the first section of the steel tower column guide frame;

[0036] Figure 12 This is a structural schematic diagram of a steel pipe lattice column support system;

[0037] Figure 13 This is a schematic diagram of the unassembled steel pipe lattice column support system;

[0038] Figure 14 This is a plan view of the steel pipe lattice column support system.

[0039] In the diagram: 1-Irregularly shaped concrete lower tower column, 2-Tie rod, 3-Bridge deck, 4-Steel pipe lattice column support frame, 5-Steel tower column, 6-Temporary cross brace, 7-First inner wooden formwork, 8-Arc steel formwork, 9-Second inner wooden formwork, 10-Formwork support system, 11-Outer wooden formwork, 12-Pile cap, 13-Insertion hole, 14-Pin, 15-Arc stiffening plate, 16-Positioning hole, 17-Connecting plate, 18-Connecting bolt, 19-Bearing plate, 20-Piercing system, 21-Through-core hydraulic cylinder, 22-Screw rod, 23-Hanging foot, 24-Moving track, 25-Beam transport flatcar, 26-Horizontal positioning device, 27-Right-angle connector, 28-Base, 29-Support pier, 30-Positioning block. 31-Fixed rail, 32-Jack, 33-Arc-shaped connecting plate, 34-Fixing block, 35-Insertion block, 36-Positioning groove, 37-Rubber pad, 38-Infrared receiver, 39-Infrared transmitter, 40-Guide rail, 41-Column, 42-Connecting rod, 43-Supporting diagonal bar, 44-Supporting crossbar, 45-Fixing plate, 46-Spring, 47-Collection box, 48-Pressure block, 49-Sleeve, 50-Threaded rod, 51-Pressure block, 52-Steel pipe column, 53-Flange, 54-Connecting steel pipe, 55-Connecting sleeve, 56-Splicing block, 57-Operating platform, 58-Insertion fastening block, 59-Insertion fastening column, 60-Insertion fastening hole, 61-Steel-concrete composite section. Detailed Implementation

[0040] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0041] Example 1

[0042] As one example, this complex linear steel-concrete composite arch bridge tower, such as Figure 1 As shown, the lower tower column adopts a standardized steel-wood composite formwork system; linear precision control technology for steel tower columns is used, and a guide frame for the first steel tower column and a multi-level steel pipe lattice column support system are set up. The complex linear steel-concrete composite arch bridge tower includes a pier cap 12, standardized steel-wood composite formwork, a linear precision control system for steel tower columns, a guide frame for the first steel tower column, and a multi-level steel pipe lattice column support system;

[0043] A standardized steel-wood composite formwork is set on the foundation 12 for pouring irregular concrete lower tower column 1. The top of the irregular concrete lower tower column 1 is provided with bridge deck 3, and a steel-concrete composite section 61 is provided on bridge deck 3.

[0044] The steel tower column 5 comprises multiple segments. The first segment of the steel tower column 5 is fixed on the steel-concrete composite section 61, and a guide frame for the first segment of the steel tower column is provided on one side. The steel pipe lattice column support system includes a steel pipe lattice column support frame 4, which is connected to the segments of the steel tower column 5 through splicing blocks 56. The gradient of the segments of the steel tower column 5 is controlled by adjusting the splicing length of the splicing blocks 56.

[0045] The linear precision control system for steel tower columns is used for the pre-assembly of steel tower columns 5.

[0046] like Figure 2 As shown, the standardized steel-wood composite formwork is sized to fit the irregular concrete lower tower column 1. The outer wooden formwork 11 and the second inner wooden formwork 9 are fixed by tie rods 2. The arc-shaped steel formwork 8 is provided with an arc-shaped stiffening plate 15, with pins 14 welded to both ends, which are inserted into the insertion holes 13 of the first inner wooden formwork 7 and the second inner wooden formwork 9, respectively. At the same time, several connecting bolts 18 are evenly distributed on the connecting plate 17 at the end of the arc-shaped steel formwork 8. The bolts pass through the positioning holes 16 of the formwork connecting plate 17 and are tightened with nuts to enhance the stability of the steel-wood composite formwork connection. The formwork support system 10 of the first inner wooden formwork 7 is set on the foundation 12.

[0047] like Figures 5 to 8 As shown, during the pre-assembly of the steel tower column 5, a horizontal pre-assembly frame is used. The beam transport flatcar 25 is placed in the directional moving track 24 of the pressure plate 19 to transport the steel tower column 5 segments to be pre-assembled. A jacking system 20 is also set on the pressure plate 19, in which the base 28 is fixed to the pressure plate 19 by a right-angle connector 27. A jack 32 is set above the base 28. The positioning block 30 welded to one end of the support pier 29 is connected to the fixed track 31 welded to one end of the jack 32. The top and bottom of the steel tower column 5 are equipped with through-holes. The hydraulic cylinder 21 applies a horizontal force to ensure the contact rate of the tower column. The screw 22 is installed on the through-cylinder 21 and fixed to the steel tower column 5 by the hanging foot 23. At the same time, a lateral positioning device 26 is also set to ensure the lateral splicing accuracy of the steel tower column 5. The lateral positioning device 26 consists of two fixing blocks 34, which are connected to the steel tower column 5 by an arc-shaped connecting plate 33. One fixing block 34 is equipped with a telescopic insert 35 and an infrared receiver 38 in the middle, and the other is equipped with a positioning groove 36 with a rubber pad 37 and an infrared transmitter 39.

[0048] like Figures 9 to 11As shown, the first steel tower column 5 guide frame has a column 41 with a certain inclination placed on the steel-concrete composite section 61. A collection box 47 is provided on its back, and a pressure block 48 is installed inside the box. The upper part of the pressure block 48 is connected to a spring 46, and the lower part is fixed to a screw rod 50. A sleeve 49 is welded to the front side and connected to one end of a telescopic support crossbar 44. The other end of the support crossbar 44 is fixed to a support diagonal bar 43. A fixing plate 45 is provided at the bottom of the diagonal bar and is fixed to the bridge deck 3 by bolts. A pressure block 51 is provided at the bottom of the screw rod 50 to change the vertical position of the pressure block 48, thereby adjusting the support angle of the support diagonal bar 43 and the support crossbar 44. A guide rail 40 is installed on the front side of the column 41. Matching guide blocks are set on the first steel tower column 5. The tower crane is used to place the guide blocks into the guide rail 40 to ensure the precise positioning of the first steel tower column 5.

[0049] like Figure 12 and Figure 13 As shown, the steel pipe column 52 is connected by flange 53, which increases its height accordingly; steel pipes 54 are welded between adjacent steel pipe columns to ensure the stability of the support system; connecting sleeves 55 are installed on the steel pipe column 52 and are bolted to the insert fastening blocks 58 on the splicing block 56; the length of the splicing blocks 56 is adjusted by inserting the insert fastening columns 59 into the insert fastening holes 60; connecting sleeves 55 are symmetrically installed on the steel tower column 5 and are also bolted to the insert fastening blocks 58 on the splicing block 56. In addition, an operating platform 57 is installed on the steel pipe lattice column support system, which can be used for temporary operation by construction personnel to improve the installation efficiency of the tower column.

[0050] Example 2

[0051] As another embodiment, this embodiment two proposes a construction method for the complex linear steel-concrete composite arch bridge tower based on embodiment one. The main construction steps are as follows:

[0052] Step 1, Lower Tower Column Formwork Engineering: The cast-in-place concrete tower column is designed as an irregular reinforced concrete structure. The reinforcing bars of each section of the concrete tower column are tied at one time. The standard steel-wood composite formwork fits the dimensions of the irregular concrete lower tower column 1. The outer wooden formwork 11 and the second inner wooden formwork 9 are fixed by tie rods 2. The arc-shaped steel formwork 8 is equipped with an arc-shaped stiffening plate 15, with pins 14 welded at both ends, which are inserted into the insertion holes 13 of the first inner wooden formwork 7 and the second inner wooden formwork 9 respectively. At the same time, several connecting bolts 18 are evenly distributed on the connecting plate 17 at the end of the arc-shaped steel formwork 8. The bolts pass through the positioning holes 16 of the formwork connecting plate 17 and are tightened with nuts to strengthen the stability of the steel-wood composite formwork connection. The formwork support system 10 of the first inner wooden formwork 7 is set on the foundation 12.

[0053] Concrete pouring and curing of the lower tower column: The concrete structure tower column is poured horizontally in layers from bottom to top. After the concrete pouring is completed, the concrete should be cured as soon as possible to keep the surface moist.

[0054] Step 2, Construction of Steel-Concrete Composite Section 61: Before pouring the concrete tower column of steel-concrete composite section 61, steel pipes are pre-embedded to form a rigid frame. The rigid frame is used to reinforce the pre-embedded base of the composite section. Finally, the first steel tower column 5 is welded using the pre-embedded base.

[0055] Step 3: Pre-assembly of steel tower column 5: During the pre-assembly of steel tower column 5, a horizontal pre-assembly frame is used. The beam transport flatcar 25 is placed in the directional moving track 24 of the pressure plate 19 to transport the steel tower column 5 segments to be pre-assembled. A lifting system 20 is also set on the pressure plate 19, in which the base 28 is fixed to the pressure plate 19 by right-angle connectors 27. A jack 32 is set above the base 28. A through-type hydraulic cylinder 21 is set at the top and bottom of the steel tower column 5 to apply horizontal force to ensure the contact rate of the tower column. A screw 22 is installed on the through-type hydraulic cylinder 21 and fixed to the steel tower column 5 by the hanging foot 23. At the same time, a transverse positioning device 26 is also set to ensure the transverse splicing accuracy of the steel tower column 5. When the two steel tower columns 5 approach each other and reach a certain distance under the action of the through-type hydraulic cylinder, they are closed in the positioning groove 36.

[0056] Step 4: Installation of the guide frame for steel tower column 5: The segmented installation and positioning control of the first steel tower column is crucial to the construction. Installing the guide frame ensures accurate positioning of the first steel tower column 5 with the pre-embedded base. The guide frame, with a certain inclination of the column 41, is placed on the steel-concrete composite section 61. A collection box 47 is provided on its back, and a pressure block 48 is installed inside the box. The upper part of the pressure block 48 is connected to the spring 46, and the lower part is fixed to the screw rod 50. A sleeve 49 is welded to the front side and connected to one end of the telescopic support crossbar 44. The other end of the support crossbar 44 is fixed to the support diagonal bar 43, and the bottom of the diagonal bar is fixed. Plate 45 is fixed to bridge deck 3 by bolts; a pressure block 51 is set at the bottom of screw rod 50. The operator applies an upward push to the pressure block 51 and uses the elastic force of spring 46 to change the vertical position of bearing block 48, thereby adjusting the support angle of support diagonal rod 43 and support cross rod 44. The operation is simple and convenient, improving the installation efficiency of guide frame on bridge deck 3; guide rail 40 is installed on the front side of column 41, and matching guide block is set on the first section of steel tower column 5. The tower crane is used to place the guide block in the guide rail 40 to ensure the accurate placement of the first section of steel tower column 5.

[0057] Step 5: Segmented Installation of Steel Tower Columns 5: The steel tower columns are installed in segments, with the two vertically separated parts welded together. After the steel structure is installed, temporary horizontal braces 6 and a multi-level steel pipe lattice column support system are used to resist the deformation of the steel tower columns. Among them, the steel pipe columns 52 are connected by flanges 53, which increases their height accordingly. Steel pipes 54 are welded between adjacent steel pipe columns to ensure the stability of the support system. Connecting sleeves 55 are installed on the steel pipe columns 52 and are bolted to the insert fastening blocks 58 on the splicing blocks 56. The length of the spliced ​​blocks 56 is adjusted by inserting the insert fastening columns 59 into the insert fastening holes 60. Connecting sleeves 55 are symmetrically installed on the steel tower columns 5 and are also bolted to the insert fastening blocks 58 on the splicing blocks 56, thus forming a multi-level steel pipe lattice column support system with different gradients.

[0058] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 1 can be referred to each other, and will not be repeated in this application.

[0059] Example 3

[0060] As another embodiment, this embodiment three proposes a more specific construction method for complex linear steel-concrete composite arch bridge towers based on embodiment two.

[0061] The positioning block 30 welded to one end of the support pier 29 is connected to the fixed track 31 welded to one end of the jack 32, ensuring that if the jack 32 fails during the pre-assembly process, the support pier 29 can serve as an auxiliary support measure in a timely manner, preventing the failure of the jack 32 from affecting the pre-assembly results.

[0062] The lateral positioning device 26 consists of two fixed blocks 34, which are connected to the steel tower column 5 via an arc-shaped connecting plate 33. One fixed block 34 has a retractable insert 35 and an infrared receiver 38 in the middle, while the other has a positioning groove 36 with a rubber pad 37 and an infrared transmitter 39. When the two steel tower columns 5 approach each other and reach a certain distance under the action of the through-type hydraulic cylinder, the infrared transmitter 39 will send a command to the infrared receiver 38, causing the insert 35 to gradually move forward and close in the positioning groove 36. The rubber pad 37 is used to reduce the frictional resistance of the lateral positioning device 26 during positioning, thereby improving the service life of the device.

[0063] It should be noted that the parts in this embodiment that are the same as or similar to those in Embodiment 2 can be referred to each other, and will not be repeated in this application.

[0064] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

Claims

1. A complex linear steel-concrete composite arch bridge tower, characterized in that, This includes the foundation, standardized steel-wood composite formwork, linear precision control system for steel tower columns, guide frame for the first section of steel tower column, and multi-level steel pipe lattice column support system; The standardized steel-wood composite formwork is placed on the pier platform for pouring irregular concrete lower tower columns. The top of the irregular concrete lower tower columns is equipped with a bridge deck, and the bridge deck is equipped with a steel-concrete composite section. The steel tower column consists of multiple segments. The first steel tower column segment is fixed on the steel-concrete composite section, and a guide frame for the first steel tower column segment is provided on one side. The steel pipe lattice column support system includes a steel pipe lattice column support frame, which is connected to the steel tower column segment through splicing blocks. The gradient of the steel tower column segment is controlled by adjusting the splicing length of the splicing blocks. A linear precision control system for steel tower columns is used for the pre-assembly of steel tower columns; The standardized steel-wood composite formwork is fitted to the dimensions of the irregularly shaped concrete lower tower column. The standardized steel-wood composite formwork includes a first inner wooden formwork, an arc-shaped steel formwork, a second inner wooden formwork, and an outer wooden formwork. The outer wooden formwork is fixed to the second inner wooden formwork by tie rods. The arc-shaped steel formwork is equipped with an arc-shaped stiffening plate, with pins welded to both ends, which are inserted into the insertion holes of the first and second inner wooden formwork, respectively. Several connecting bolts are provided at the ends of the arc-shaped steel formwork via connecting plates. Connecting plates are also provided at the ends of the first and second inner wooden formwork, with positioning holes on the connecting plates. The connecting bolts pass through the positioning holes and are tightened by nuts. A formwork support system for the first inner wooden formwork is provided on the foundation. The first section of the steel tower column guide frame includes a column, which is placed on the steel-concrete composite section. A collection box is provided on the back side of the column, and a pressure block is installed inside the collection box. A spring is connected to the upper part of the pressure block, and a screw rod is fixed to the lower part. The pressure block is connected to a support crossbar through a sleeve. The other end of the support crossbar is fixed to a support diagonal bar. A fixing plate is provided at the bottom of the diagonal bar, and the fixing plate is fixed to the bridge deck by bolts. A pressure block is provided at the bottom of the screw rod. A guide rail is installed on the front side of the column, and a guide block matching the guide rail is provided on the first section of the steel tower column. The guide block is placed inside the guide rail. The steel pipe lattice column support frame includes steel pipe columns and splicing blocks. The steel pipe columns are connected by flanges. Steel pipes are welded between adjacent steel pipe columns. Connecting sleeves are installed on the steel pipe columns, and splicing blocks are connected by insert fastening blocks and connecting sleeves. Insert fastening columns and insert fastening holes are respectively provided at both ends of the splicing blocks. Adjacent splicing blocks are spliced ​​by inserting fastening columns into the insert fastening holes. Connecting sleeves are symmetrically arranged on the steel tower columns. The connecting sleeves on the steel tower columns are also bolted to the insert fastening blocks on the splicing blocks, forming a multi-level steel pipe lattice column support system with different gradients. An operating platform is also installed on the steel pipe lattice column support system.

2. The construction method for the complex linear steel-concrete composite arch bridge tower as described in claim 1, characterized in that, Includes the following steps: Step 1, Lower Tower Column Formwork Engineering: Erect prefabricated steel and wood composite formwork on the pier, pour irregular concrete for the lower tower column, and set up the bridge deck; Step 2, Construction of the steel-concrete composite section: Pour the steel-concrete composite section on the bridge deck; Step 3: Pre-assembly of steel tower columns: The steel tower columns are pre-assembled on the horizontal plane using a linear precision control system. The top and bottom of the steel tower columns are connected by bolts. At the same time, a lateral positioning device is also set up to position the steel tower columns laterally. Step 4: Installation of the first steel tower column: Set up a guide frame for the first steel tower column on the steel-concrete composite section, place the first steel tower column along the guide frame on the steel-concrete composite section and weld it; Step 5: Segmented installation of steel tower columns: The steel tower columns are installed in segments, and a multi-level steel pipe lattice column support system is set up to resist the deformation of the steel tower columns.

3. The construction method for complex linear steel-concrete composite arch bridge towers according to claim 2, characterized in that, The linear precision control system for the steel tower column includes a pressure plate and a beam transport flatcar. The pressure plate has a directional moving track, and the beam transport flatcar is placed within this track. A lifting system is installed on the pressure plate, with its base fixed to the pressure plate via right-angle connectors. A jack is installed above the base, and a support pier is connected to one side of each jack via a fixed track, serving as auxiliary support in case of jack failure. Positioning blocks are welded to the support piers and connected to the fixed track. Through-type hydraulic cylinders are installed at the top and bottom of the steel tower column, with screws installed between them. These screws are fixed to the steel tower column via hanging feet.

4. The construction method for complex linear steel-concrete composite arch bridge towers according to claim 2, characterized in that, A lateral positioning device is also installed on the adjacent end faces of the steel tower columns. The lateral positioning device includes a fixing block. The two fixing blocks are connected to the ends of the two steel tower columns respectively through an arc-shaped connecting plate. A telescopic insert and an infrared receiver are set in the middle of one fixing block, and a positioning groove with a rubber pad and an infrared transmitter are set in the middle of the other fixing block. When the steel tower columns approach each other and reach a certain distance under the action of the through-cylinder, the infrared transmitter sends a command to the infrared receiver, causing the insert to move forward gradually and close in the positioning groove.

5. The construction method for complex linear steel-concrete composite arch bridge towers according to claim 2, characterized in that, In step five, after the steel tower columns are installed in sections, temporary cross bracing is installed between the steel tower columns on both sides.

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