Prefabrication and casting device and method for PC composite beam with variable cross-section height corrugated steel web

Abstract

The present invention relates to a device and method for prefabricating and casting PC composite beams with variable cross-section heights and corrugated steel webs. The device comprises a plurality of movable hoisting assemblies connected by longitudinal upper truss beams and longitudinal lower truss beams. Each movable hoisting assembly comprises a transverse upper truss beam and two vertical support truss columns. The transverse upper truss beam is provided with a movable track and a tie rod lifting device. Each tie rod lifting device is provided with two tie rods. The bottom of the vertical support truss column is provided with a movable device and a hydraulic jacking device. A transverse middle support beam and a transverse lower support beam are provided in sequence between the two vertical support truss columns below the transverse upper truss beam. The tie rods are connected to the bottom formwork, transverse middle support beam, and transverse lower support beam of the concrete top plate steel formwork via tie rod anchor bolt devices. The present invention realizes the prefabrication and casting of the variable linear bottom plate of the PC composite beam with corrugated steel webs and the overall prefabrication of the PC composite beam with corrugated steel webs. It is applicable to the prefabrication of composite beams with different cross-sections and different segment lengths, thereby improving utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of construction of PC composite beams with corrugated steel webs, and in particular to a prefabrication and casting device and method for PC composite beams with corrugated steel webs having variable cross-section heights. Background Art

[0002] PC composite beams with corrugated steel webs are a new type of bridge structure that leverages the compressive strength of concrete and the shear strength of corrugated steel webs, significantly reducing the deadweight of the structure and gaining widespread application. However, PC composite beams with corrugated steel webs are typically constructed using cast-in-place techniques, which can be slow to implement and difficult to control in terms of quality and alignment.

[0003] To improve this situation, prefabrication and pouring of PC composite beams with corrugated steel webs is becoming increasingly common. However, for PC composite beams with variable cross-section heights, whether constructed using the long-line or short-line method, floor-standing pedestals are often used due to the varying bottom formwork shapes. These pedestals can only meet one-time construction requirements and cannot accommodate the repetitive prefabrication of PC composite beams with corrugated steel webs of varying cross-sections and segment lengths. Furthermore, these pedestals cannot meet on-site transportation requirements. Summary of the Invention

[0004] The present invention aims to solve the deficiencies of the prior art and to provide a device and method for prefabricating and casting PC composite beams with variable cross-section height corrugated steel webs.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A prefabrication and casting device for a PC composite beam with a variable cross-section height and corrugated steel webs comprises a plurality of movable hoisting assemblies arranged in parallel along the longitudinal direction, wherein the plurality of movable hoisting assemblies are connected by a longitudinal upper truss beam and a longitudinal lower truss beam;

[0007] Each mobile lifting assembly includes a horizontal upper truss beam and two vertical supporting truss columns. The horizontal upper truss beam and the two vertical supporting truss columns form an N-shaped structure. A movable track is provided on the horizontal upper truss beam. A plurality of tie rod lifting devices are slidably installed on the movable track. Two tie rods are installed on the tie rod lifting device, and the two tie rods are symmetrically arranged on both sides of the horizontal upper truss beam. A moving device and a hydraulic jacking device are provided at the bottom of the vertical supporting truss column. A horizontal middle support beam and a horizontal lower support beam are provided in sequence below the horizontal upper truss beam between the two vertical supporting truss columns. A concrete top plate steel formwork is provided above the horizontal middle support beam, and a concrete bottom plate steel formwork is provided on the top of the horizontal lower support beam. The tie rods are fixedly connected to the bottom formwork of the concrete top plate steel formwork, the horizontal middle support beam and the horizontal lower support beam in sequence through a plurality of tie rod anchor devices. The side formworks of the concrete bottom plate steel formwork and the side formworks of the concrete top plate steel formwork are connected by tie rods on the steel formwork side formworks.

[0008] The transverse middle support beam includes several middle beam segments. The butt end surfaces of two adjacent middle beam segments are both equipped with transverse hydraulic jacking devices, and the bottoms of the butt ends of two adjacent middle beam segments are both equipped with oblique fixed struts.

[0009] The vertical supporting truss column is fixed with two upper and lower positioning seats on one side of the horizontal middle supporting beam through fixed anchor bolts, and a fixed slot is formed between the two positioning seats. The ends of the middle beam segments at both ends of the horizontal middle supporting beam are inserted into the corresponding fixed slots.

[0010] A transverse bottom tensioning device is provided between the lower ends of the two vertical supporting truss columns.

[0011] Cover plates are provided on the top and bottom of the transverse middle supporting beam and the transverse lower supporting beam.

[0012] The pull rod anchor device includes a baffle, the bottom of the pull rod passes through the baffle and is fixed by a nut, and double-jointed channel steel is provided between the baffle and the bottom formwork of the corresponding concrete top plate steel formwork, the horizontal middle support beam, and the horizontal lower support beam.

[0013] The pull rod lifting device is adjusted by sliding horizontally along the moving track.

[0014] The construction method of the above-mentioned variable cross-section height corrugated steel web PC composite beam prefabrication casting device has the following specific steps:

[0015] S1. Install the horizontal upper truss beam, vertical support truss column, movable track, tie rod lifting device, tie rod, movable device, hydraulic jacking device and horizontal bottom pulling device of each mobile hoisting assembly, and connect several mobile hoisting assemblies through the longitudinal upper truss beam and longitudinal lower truss beam;

[0016] S2. Install the tie rods corresponding to the corrugated steel webs on the corrugated steel webs. Fix the upper and lower positioning seats to the side walls of the vertical support truss columns using anchor bolts. After the tie rod lifting device lifts the corrugated steel webs to the installation height, the tie rod lifting device slides laterally along the movable track to adjust the corrugated steel webs to the designed position.

[0017] S3. Adjust the tie rod lifting device of the hoisting formwork to the designed position. After hoisting the concrete top slab steel formwork, fix the tie rod to the bottom formwork of the concrete top slab steel formwork using the tie rod anchor device. Fix the two side formworks of the concrete top slab steel formwork to the tie rod using the steel formwork side formworks. Install the transverse middle support beam. Insert the two ends of the transverse middle support beam into the fixing notches of the two positioning seats. The corrugated steel web is located between the two middle beam segments of the transverse middle support beam. Fix the corrugated steel web using the transverse hydraulic jacking device and the oblique fixed braces. Pour the top slab concrete and perform curing to obtain the concrete top slab.

[0018] S4. Install the transverse lower support beam, temporarily fix the tie rod and the transverse lower support beam using a tie rod anchor device, install the concrete bottom slab steel formwork on the top of the transverse lower support beam, fix the tie rod using the two side formworks of the concrete bottom slab steel formwork, adjust the linear shape of the concrete bottom slab to be poured using the tie rod anchor device, tighten the tie rod and the tie rod anchor device at the bottom of the transverse lower support beam after the adjustment is completed, fix the concrete bottom slab steel formwork to the designed position, pour the bottom slab concrete, and cure to obtain the concrete bottom slab;

[0019] S5. After the structural concrete reaches a certain strength, remove the lower transverse support beam and the concrete bottom plate steel formwork, lift the tie rods except the tie rods in the corrugated steel web, and gradually remove the middle transverse support beam and the concrete top plate steel formwork. Lift the precast box beam segments through the tie rod lifting device and the tie rods in the corrugated steel web and transport them.

[0020] The beneficial effects of the present invention are as follows: the present invention realizes the standardized, on-site prefabrication production and transportation of the variable linear bottom plate prefabrication and the overall prefabrication of the corrugated steel web PC composite beam, and the variable cross-section height corrugated steel web box beam hoisting prefabrication and casting device can be applied to the prefabrication of composite beams with different cross-sections and different segment lengths, can be used in a turnover manner, and improves the utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a longitudinal schematic diagram of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0023] Figure 3 It is a longitudinal cross-sectional schematic diagram of the present invention;

[0024] Figure 4 This is a schematic diagram of step S1 during the construction of the present invention;

[0025] Figure 5 This is a schematic diagram of step S2 during the construction of the present invention;

[0026] Figure 6 Schematic diagram of step S3 during construction of the present invention;

[0027] Figure 7 Schematic diagram of step S4 during construction of the present invention;

[0028] Figure 8 Schematic diagram of step S5 during construction of the present invention;

[0029] In the figure: 1-longitudinal upper truss beam; 2-longitudinal lower truss beam; 3-transverse upper truss beam; 4-vertical support truss column; 5-movable track; 6-pull rod lifting device; 7-pull rod; 8-moving device; 9-hydraulic jacking device; 10-transverse middle support beam; 11-transverse lower support beam; 12-pull rod anchor device; 13-transverse hydraulic jacking device; 14-diagonal fixed support rod; 15-fixed anchor bolt; 16-locating seat; 17-transverse bottom tensioning device; 18-cover plate; 19-steel formwork side formwork tie rod; 20-corrugated steel web; 21-concrete bottom plate steel formwork; 22-concrete bottom plate; 23-concrete top plate steel formwork; 24-concrete top plate;

[0030] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0032] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The present invention will be further described below with reference to the accompanying drawings and examples:

[0035] Precast casting device for PC composite beam with variable cross-section height corrugated steel web, such as Figure 1 As shown, it includes a plurality of movable hoisting assemblies arranged in parallel along the longitudinal direction, and the plurality of movable hoisting assemblies are connected by a longitudinal upper truss beam 1 and a longitudinal lower truss beam 2.

[0036] Each mobile lifting component is as follows Figure 2 、 Figure 3 As shown, each comprises a transverse upper truss beam 3 and two vertical support truss columns 4, the transverse upper truss beam 3 and the two vertical support truss columns 4 form an n-shaped structure, a movable track 5 is provided on the transverse upper truss beam 3, a plurality of pull rod lifting devices 6 are slidably installed on the movable track 5, two pull rods 7 are installed on the pull rod lifting device 6, and the two pull rods 7 are symmetrically arranged on both sides of the transverse upper truss beam 3, a moving device 8 and a hydraulic jacking device 9 are provided at the bottom of the vertical support truss column 4, and the two vertical support truss columns 4 are connected to the transverse upper truss beam 3. A transverse middle support beam 10 and a transverse lower support beam 11 are arranged in sequence below the beam 3, a concrete top plate steel formwork 23 is arranged above the transverse middle support beam 10, and a concrete bottom plate steel formwork 21 is arranged on the top of the transverse lower support beam 11. The tie rod 7 is fixedly connected to the bottom formwork of the concrete top plate steel formwork 23, the transverse middle support beam 10, and the transverse lower support beam 11 in sequence through a number of tie rod anchor devices 12, and the side forms of the concrete bottom plate steel formwork 21 and the side forms of the concrete top plate steel formwork 23 are connected through the steel formwork side formwork tie rods 19.

[0037] The rod lifting device 6 is controlled by a hydraulic lifting mechanism to perform lifting operations. The rod lifting device 6 slides laterally along the movable track 5 to adjust the lateral spacing between the rods 7 to meet the requirements of pouring different cross sections.

[0038] The tie rod 7 is fixedly connected to the bottom formwork of the concrete top plate steel formwork 23, the transverse middle support beam 10, and the transverse lower support beam 11 in sequence through several tie rod anchor devices 12. The tie rod lifting device 6 can adjust the height of the transverse middle support beam 10 and the transverse lower support beam 11 by lifting the tie rod 7.

[0039] The transverse middle support beam 10 mainly plays the role of fixing the corrugated steel web 20, and the transverse lower support beam 11 mainly plays the role of supporting and adjusting the linear shape of the concrete bottom plate steel formwork 21.

[0040] Each tie rod lifting device 6 can simultaneously adjust the two tie rods 7 to raise and lower them, thereby adjusting the height and longitudinal angle of the concrete bottom slab steel formwork 21 and the concrete top slab steel formwork 23. The side forms of the concrete bottom slab steel formwork 21 and the side forms of the concrete top slab steel formwork 23 are connected by steel formwork side form tie rods 19.

[0041] Each tie rod lifting device 6 can move laterally along the moving track 5 of the upper truss beam 3, thereby adjusting the lateral spacing between the tie rods 7 to meet the requirements of casting with different cross sections.

[0042] A hydraulic jacking device 9 and a moving device 8 are arranged at the bottom of the vertical supporting truss column 4. The entire device can be lifted and fixed by the hydraulic jacking device 9 and can be moved by the moving device 8.

[0043] The moving device 8 can adjust the length of the prefabricated casting segment of the variable cross-section height corrugated steel web box girder together with the longitudinal upper truss beam 1 and the longitudinal lower truss beam 2 to meet the requirements of different casting segment lengths.

[0044] The transverse middle support beam 10 includes several middle beam segments. The butt joint surfaces of two adjacent middle beam segments are both installed with transverse hydraulic jacking devices 13 , and the bottoms of the butt joint ends of two adjacent middle beam segments are both installed with oblique fixed struts 14 .

[0045] The transverse hydraulic jacking device 13 and the oblique fixing struts 14 are used to control the fixation of the corrugated steel web 20 .

[0046] The vertical supporting truss column 4 is fixed with two upper and lower positioning seats 16 on the side facing the horizontal middle support beam 10 through a fixing anchor bolt 15. A fixing slot is formed between the two positioning seats 16, and the ends of the middle beam segments at both ends of the horizontal middle support beam 10 are inserted into the corresponding fixing slots.

[0047] A transverse bottom tensioning device 17 is provided between the lower ends of the two vertical supporting truss columns 4 .

[0048] Cover plates 18 are provided on the top and bottom of the transverse middle support beam 10 and the transverse lower support beam 11 to enhance the strength and integrity of the transverse middle support beam 10 and the transverse lower support beam 11 .

[0049] The cover plate 18 on the top of the lower transverse support beam 11 adjusts the longitudinal change angle of the bottom plate steel template 21 by changing its thickness, and the tie rod anchor device 12 is supported below the cover plate 18 at the bottom of the lower transverse support beam 11.

[0050] The tie rod anchor device 12 includes a baffle, the bottom of the tie rod passes through the baffle and is fixed by a nut, and a double-jointed channel steel is provided between the baffle and the corresponding transverse middle support beam 10 and the transverse lower support beam 11.

[0051] The construction method of the above-mentioned variable cross-section height corrugated steel web PC composite beam prefabrication casting device has the following specific steps:

[0052] S1, such as Figure 4 As shown, the horizontal upper truss beam 3, vertical support truss column 4, movable track 5, tie rod lifting device 6, tie rod 7, movable device 8, hydraulic jacking device 9 and horizontal bottom pulling device 17 of each mobile hoisting assembly are installed, and the plurality of mobile hoisting assemblies are connected by the longitudinal upper truss beam 1 and the longitudinal lower truss beam 2;

[0053] S2, such as Figure 5As shown, the tie rods 7 corresponding to the corrugated steel webs 20 are installed on the corrugated steel webs 20, and the upper and lower positioning seats 16 are fixed to the side walls of the vertical support truss columns 4 by fixing anchor bolts 15. After the tie rod lifting device 6 lifts the corrugated steel webs 20 to the installation height, the tie rod lifting device 6 slides laterally along the movable track 5 to adjust the corrugated steel webs 20 to the designed position;

[0054] S3, such as Figure 6 As shown, the tie rod lifting device 6 of the hoisting formwork is adjusted to the designed position, and after the concrete top plate steel formwork 23 is hoisted, the tie rod 7 is fixed to the bottom formwork of the concrete top plate steel formwork 23 by the tie rod anchor device 12. The two side forms of the concrete top plate steel formwork 23 are fixed to the tie rod 19 by the steel formwork side forms. The transverse middle support beam 10 is installed, and the two ends of the transverse middle support beam 10 are inserted into the fixing notches of the two positioning seats 16. The corrugated steel web 20 is located between the two middle beam segments of the transverse middle support beam 10. The corrugated steel web 20 is fixed by the transverse hydraulic jacking device 13 and the oblique fixed struts 14. The top plate concrete is poured and cured to obtain the concrete top plate 24.

[0055] When the tie rod anchor device 12 temporarily fixes the tie rod 7 to the transverse lower support beam 11, the angle change of the box beam concrete bottom plate 22 in the longitudinal direction is controlled by adjusting the height position of the tie rod anchor device 12 on the two longitudinal tie rods 7 on the same tie rod lifting device 6;

[0056] S4, such as Figure 7 As shown, the transverse lower support beam 11 is installed, the tie rod 7 and the transverse lower support beam 11 are temporarily fixed by the tie rod anchor device 12, the concrete bottom plate steel formwork 21 is installed on the top of the transverse lower support beam 11, the two side forms of the concrete bottom plate steel formwork 21 are fixed to the tie rod 19 by the steel formwork side formwork, the line shape of the concrete bottom plate 22 to be poured is adjusted by the tie rod anchor device 12, after the adjustment is completed, the tie rod 7 and the tie rod anchor device 12 at the bottom of the transverse lower support beam 11 are tightened, the concrete bottom plate steel formwork 21 is fixed to the designed position, and the bottom plate concrete is poured and cured to obtain the concrete bottom plate 22;

[0057] Before tightening the tie rod 7 and the tie rod anchor device 12 of the horizontal middle support beam 10, readjust the anchor position of the tie rod anchor device 12 according to the vertical deformation degree of the tie rod 7 to ensure the height of the concrete top plate 24;

[0058] S5, such as Figure 8 As shown, after the structural concrete reaches a certain strength, the lower transverse support beam 11 and the concrete bottom plate steel formwork 21 are removed, the tie rods 7 except the tie rods 7 in the corrugated steel web 20 are lifted, and the transverse middle support beam 10 and the concrete top plate steel formwork 23 are gradually removed. The prefabricated box beam segment is lifted and transported through the tie rod lifting device 6 and the tie rods 7 in the corrugated steel web 20.

[0059] The present invention realizes the prefabrication and casting of the variable linear bottom plate of the corrugated steel web PC composite beam and the standardized, on-site prefabrication production and transportation of the entire prefabrication of the corrugated steel web PC composite beam. In addition, the hoisting prefabrication and casting device for the variable cross-section height corrugated steel web box beam can be suitable for the prefabrication of composite beams with different cross-sections and different segment lengths, can be used in a turnover manner, and improves the utilization rate.

[0060] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. Prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs, characterized in that: It comprises a plurality of movable hoisting assemblies arranged in parallel along the longitudinal direction, wherein the plurality of movable hoisting assemblies are connected by a longitudinal upper truss beam (1) and a longitudinal lower truss beam (2); Each mobile hoisting assembly includes a horizontal upper truss beam (3) and two vertical supporting truss columns (4), the horizontal upper truss beam (3) and the two vertical supporting truss columns (4) form an n-shaped structure, a movable track (5) is provided on the horizontal upper truss beam (3), a plurality of pull rod lifting devices (6) are slidably installed on the movable track (5), two pull rods (7) are installed on the pull rod lifting device (6), and the two pull rods (7) are symmetrically arranged on both sides of the horizontal upper truss beam (3), a moving device (8) and a hydraulic jacking device (9) are provided at the bottom of the vertical supporting truss column (4), and the two vertical supporting truss columns (4) are horizontally spaced apart. A transverse middle support beam (10) and a transverse lower support beam (11) are sequentially provided below the upper truss beam (3); a concrete top plate steel formwork (23) is provided above the transverse middle support beam (10); a concrete bottom plate steel formwork (21) is provided on the top of the transverse lower support beam (11); a tie rod (7) is sequentially fixedly connected to the bottom formwork of the concrete top plate steel formwork (23), the transverse middle support beam (10), and the transverse lower support beam (11) through a plurality of tie rod anchor devices (12); and the side forms of the concrete bottom plate steel formwork (21) and the side forms of the concrete top plate steel formwork (23) are connected through a steel formwork side formwork tie rod (19).

2. The prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs according to claim 1 is characterized in that: The transverse middle support beam (10) comprises a plurality of middle beam segments, the butt end surfaces of two adjacent middle beam segments are both equipped with transverse hydraulic jacking devices (13), and the bottoms of the butt ends of the two adjacent middle beam segments are both equipped with oblique fixed struts (14).

3. The prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs according to claim 2 is characterized in that: Two upper and lower positioning seats (16) are fixed to the side of the vertical support truss column (4) facing the transverse middle support beam (10) through fixing anchor bolts (15), and a fixing notch is formed between the two positioning seats (16). The ends of the middle beam segments at both ends of the transverse middle support beam (10) are inserted into the corresponding fixing notches.

4. The prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs according to claim 3 is characterized in that: A transverse bottom tensioning device (17) is provided between the lower ends of the two vertical supporting truss columns (4).

5. The prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs according to claim 4 is characterized in that: Cover plates (18) are provided on the top and bottom of the transverse middle support beam (10) and the transverse lower support beam (11).

6. The prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs according to claim 5 is characterized in that: The pull rod anchor device (12) includes a baffle, the bottom of the pull rod passes through the baffle and is fixed by a nut, and double-jointed channel steel is provided between the baffle and the bottom form of the corresponding concrete top plate steel formwork (23), the horizontal middle support beam (10), and the horizontal lower support beam (11).

7. The prefabrication and casting device for PC composite beams with variable cross-section height and corrugated steel webs according to claim 6 is characterized in that: The pull rod lifting device (6) is slidably adjusted laterally along the movable track (5).

8. A construction method for the prefabrication and casting device of the variable cross-section height corrugated steel web PC composite beam according to claim 7, characterized in that: The specific steps are: S1, installing the transverse upper truss beam (3), vertical support truss column (4), movable track (5), tie rod lifting device (6), tie rod (7), movable device (8), hydraulic jacking device (9) and transverse bottom pulling device (17) of each movable hoisting assembly, and connecting several movable hoisting assemblies through the longitudinal upper truss beam (1) and the longitudinal lower truss beam (2); S2. Install the tie rod (7) corresponding to the corrugated steel web (20) on the corrugated steel web (20), fix the upper and lower positioning seats (16) on the side walls of the vertical support truss column (4) by fixing the anchor bolts (15), and after the tie rod lifting device (6) lifts the corrugated steel web (20) to the installation height, the tie rod lifting device (6) slides laterally along the moving track (5) to adjust the corrugated steel web (20) to the designed position; S3, adjust the tie rod lifting device (6) of the hoisting template to the designed position, hoist the concrete top plate steel template (23), fix the tie rod (7) and the bottom template of the concrete top plate steel template (23) through the tie rod anchor device (12), fix the two side templates of the concrete top plate steel template (23) to the tie rod (19) through the steel template side template, install the transverse middle support beam (10), insert the two ends of the transverse middle support beam (10) into the fixing notches of the two positioning seats (16), the corrugated steel web (20) is located between the two middle beam sections of the transverse middle support beam (10), fix the corrugated steel web (20) through the transverse hydraulic jacking device (13) and the oblique fixed strut (14), pour the top plate concrete, and maintain it to obtain the concrete top plate (24); S4, installing the transverse lower support beam (11), temporarily fixing the tie rod (7) and the transverse lower support beam (11) by the tie rod anchor device (12), installing the concrete bottom plate steel formwork (21) on the top of the transverse lower support beam (11), fixing the tie rod (19) by the two side forms of the concrete bottom plate steel formwork (21) through the steel formwork side forms, adjusting the line shape of the concrete bottom plate (22) to be poured by the tie rod anchor device (12), tightening the tie rod (7) and the tie rod anchor device (12) at the bottom of the transverse lower support beam (11) after the adjustment is completed, and pouring the bottom plate concrete after the concrete bottom plate steel formwork (21) is fixed to the designed position, and curing to obtain the concrete bottom plate (22); S5. After the structural concrete reaches a certain strength, remove the lower transverse support beam (11) and the concrete bottom plate steel formwork (21), lift the tie rods (7) except the tie rods (7) in the corrugated steel web (20), and gradually remove the middle transverse support beam (10) and the concrete top plate steel formwork (23). Lift the prefabricated box beam segment through the tie rod lifting device (6) and the tie rods (7) in the corrugated steel web (20) and transport it.

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