An above-water segment beam lifting station and closing construction method

Abstract

The present application relates to an above-water segmental beam lifting station and a closure construction method, and relates to the technical field of bridge segmental beam closure. The station comprises bridge piers and bridge frames arranged on the piers, a closure section is formed between the bridge frames, and support columns for auxiliary support of the bridge frames are arranged near the closure section of the piers. Lifting trusses are respectively arranged on the bridge frames on both sides of the closure section, and through-hole jacks are arranged on the lifting trusses. Lifting steel ropes are movably installed on the through-hole jacks. The ends of the lifting steel ropes on both sides facing the water surface are commonly connected to a stabilizing frame for connecting the segmental beams; and an adjustment bracket is arranged below the lifting truss. The present application can effectively solve the problem of slow construction progress of the closure section of a span bridge seriously affecting navigation, can achieve the overall lifting and precise positioning of the segmental beam, and improve the safety and efficiency of the closure construction of the steel structure bridge.

Description

Technical Field

[0001] The present application relates to the technical field of bridge segment beam closure, and in particular to an above-water segment beam lifting station and a closure construction method. Background Art

[0002] At present, segmental beam closure is a common construction method in the process of bridge construction in large-span river-crossing bridge projects. According to different shipping levels, the design structure of the segmental beam lifting station on the corresponding bridge and the method to solve the problem of slow construction progress of the corresponding closure section seriously affecting navigation are also different.

[0003] In the existing construction environment of bridges crossing rivers below the third-level waterway, the corresponding segmental beams are generally anchored on both sides of the river bank during the lifting and closing construction process. At the same time, the corresponding ships are anchored in the river channel to achieve the positioning accuracy of the segmental beams on the ships during the lifting and closing process.

[0004] Regarding the above-mentioned related technologies, the inventor believes that the method of anchoring and positioning floating boats is only applicable to the short-span closure construction environment below the third-level waterway. When the super-long span bridge above the third-level waterway needs to close the segmental beam, the construction method of anchoring the closure section floating boats on both sides is not suitable. Because the third-level waterway at this time is too wide and the silt in the river is too deep, it is impossible to anchor the closure section floating boats from both sides of the river bank, and it is also difficult for the boats to anchor in the river. Therefore, it is only possible to use floating boats in the middle of the river to carry out the lifting and closing work. How to design a method that can be applied to the problem of the slow construction progress of the closure section of super-long span bridges above the third-level waterway, which seriously affects navigation, is a problem that technicians in this field need to solve. Summary of the Invention

[0005] In order to improve the problem that the existing anchoring positioning method cannot be applied to the lifting and closing construction of segmental beams with ultra-long spans above the third-level waterway, the purpose of this application is to provide an on-water segmental beam lifting station and closing construction method.

[0006] The above-water segment beam lifting station provided in this application adopts the following technical solution:

[0007] An above-water segment beam lifting station comprises a bridge pier and a bridge frame arranged on the bridge pier, a closing section is formed between the bridge frames, a support column for auxiliary support of the bridge frame is arranged at the position of the bridge pier close to the closing section, a lifting truss is respectively arranged on the bridge frame on both sides of the closing section, a through-hole jack is arranged on the lifting truss, a lifting steel rope is movably installed on the through-hole jack, and the ends of the lifting steel ropes on both sides facing the water surface are jointly connected to a stabilizing frame for connecting the segment beam; an adjusting bracket is arranged under the lifting truss, and the adjusting bracket is provided. The legs include a bridge deck and a support plate. The support plate is connected to the bridge deck through a rotating shaft. One side of the support plate extends outward along one end of the bridge deck. When the through-hole jack lifts the segmental beam on the stabilizing frame through the lifting steel rope and touches the support plate, the support plate flips upward so that the bottom surface of the segmental beam is higher than the support plate. At this time, the support plate falls freely and is horizontally supported by the bridge deck at the bottom of the segmental beam; a positioning guide rail is vertically arranged between the adjustment bracket and the lifting truss, and the segmental beam is lifted along the positioning guide rail to be flush with the bridge frames on both sides.

[0008] By adopting the above technical solution, the through-hole jack controls the stabilizing frame to lift upward through the lifting steel rope. The stabilizing frame is connected to the segmental beam. When the segmental beam is lifted and touches the support plate, the support plate flips upward so that the bottom surface of the segmental beam is higher than the support plate. At this time, the support plate falls freely and is horizontally supported by the bridge deck at the bottom of the segmental beam to bear the overall weight. At this time, the stabilizing frame can be removed and reconnected to the segmental beam through the lifting steel rope. The segmental beam is lifted again along the positioning guide rail to be flush with the bridge frames on both sides. Through the overall lifting station structure, the long-span segmental beam can be effectively and accurately positioned and lifted to complete the closing construction.

[0009] Optionally, the adjustment bracket also includes a fixed seat, a sliding guide rail for installing the rotating shaft is opened in the fixed seat, a pull rope mechanism is provided on one side of the fixed seat, the pull rope mechanism includes a driving member, a steering wheel and a pull rope, the pull rope mechanism is provided with a group of members respectively located on both sides of the sliding guide rail, one end of the pull rope is movably connected to the driving member, and the other end is fixedly connected to the rotating shaft, the steering wheel is in contact with the pull rope, and the driving member controls the rotating shaft to move back and forth along the sliding guide rail through the pull rope.

[0010] By adopting the above technical solution, the rotating shaft can rotate or slide along the sliding guide rail, and the driving part controls the rotating shaft to slide left and right along the sliding guide rail through the pull rope to adjust the installation position of the corresponding support plate against the bottom of the segment beam, so as to better bear the load. The steering wheel can effectively reduce the friction of the pull rope and save more effort.

[0011] Optionally, a receiving plate is provided on the other side of the fixing seat relative to the pull rope mechanism, and the support plate abuts against the receiving plate to achieve horizontal arrangement.

[0012] By adopting the above technical solution, the receiving plate can effectively support the supporting plate, so that the supporting plate is horizontally supported and the stability is enhanced.

[0013] Optionally, a lubricating layer is provided on the sliding guide rail and the receiving plate.

[0014] By adopting the above technical solution, the lubricating layer adopts a polytetrafluoroethylene coating, which can effectively reduce the friction between the rotating shaft and the sliding guide rail, while reducing the direct contact force between the receiving plate and the support plate, thereby extending the service life.

[0015] Optionally, the positioning guide rail includes a support arm and a receiving block, a movable groove for the sliding of the segmental beam is formed in the support arm, the receiving block is located at the end facing the lifting truss, the receiving block is located on one side of the movable groove and is movably hinged with a spring-loaded block, and a spring-loaded piece is provided between the spring-loaded block and the receiving block; when the segmental beam abuts against the spring-loaded block, the spring-loaded block retracts toward the receiving block using the spring-loaded piece, and when the bottom surface of the segmental beam is higher than the spring-loaded block, the spring-loaded block deforms and recovers to abut the bottom of the segmental beam.

[0016] By adopting the above technical solution, the support arm can ensure that the segment beam can slide vertically upward, the spring block can achieve the spring effect through the spring piece, and the deformation recovery of the spring block can achieve limited support for the segment beam.

[0017] A method for closure construction of an overwater segmental beam comprises the following steps:

[0018] S1: Anchor buoys are set at the closure section position using GPS positioning as reference marks for vessel transportation;

[0019] S2: The vessel transports the segmental beam to the predetermined position of the anchoring buoy by means of a power tugboat and a power boat, and adjusts the segmental beam so that it is directly below the area to be closed during transportation;

[0020] S3: Install the lifting trusses on the bridge frames on both sides of the closure section, install through-hole jacks on the lifting trusses, and install the adjusting brackets below the lifting trusses;

[0021] S4: Install the lifting steel rope on the through-hole jack, and horizontally install a stabilizing frame at the end of the lifting steel rope facing the segmental beam. The stabilizing frame is located directly above the segmental beam. The stabilizing frame and the segmental beam are fixedly connected by multiple lifting connectors to improve the safety and stability of the segmental beam during the lifting process.

[0022] S5: The first lifting is carried out. The through-hole jack controls the segmental beam to be lifted to the adjustment bracket through the lifting steel rope and temporarily placed. The support plate is supported horizontally at the bottom of the segmental beam through the bridge deck to achieve overall support.

[0023] S6: Remove the stabilizing frame to complete the force conversion. At the same time, reconnect the lifting steel rope to the segmental beam and install the positioning guide rail. Use the rope pulling mechanism to adjust the horizontal position of the support plate and the segmental beam above it so that the upper part of the segmental beam is aligned with the lower part of the positioning guide rail. This completes the first position adjustment before the segmental beam is closed.

[0024] S7: The through-hole jacks continue to control the segmental beam to lift upward along the movable groove of the positioning guide rail through the lifting steel rope, so that the bottom of the segmental beam is supported by the spring-loaded block. At the same time, the adjustment bracket is removed, thus completing the second position adjustment before closing. At this time, the segmental beam is flush with the bridge frames on both sides.

[0025] S8: When the ambient temperature reaches the required closing temperature, the closing welding is carried out, and then the guide rails are removed to complete the closing of the steel bridge.

[0026] By adopting the above technical solution and the closing construction process of the above steps, the accurate positioning of the segmental beam can be effectively achieved. At the same time, this method can realize the efficient, safe, high-quality and quantity-guaranteed lifting and closing of the segmental beam.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Through the structural design of the lifting station and the specific methods of closure construction, the problem of slow construction progress of the closure section of the span bridge seriously affecting navigation can be effectively solved. The overall lifting and precise positioning of the segmental beam can be achieved, which improves the safety and efficiency of the closure construction of the steel structure bridge.

[0029] 2. The driving part controls the rotating shaft to slide left and right along the sliding guide rail through the pull rope to adjust the installation position of the corresponding support plate against the bottom of the segment beam to better bear the load. The steering wheel can effectively reduce the friction of the pull rope and save more effort.

[0030] 3. The lubricating layer adopts polytetrafluoroethylene coating, which can effectively reduce the friction between the rotating shaft and the sliding guide rail, while reducing the direct contact force between the receiving plate and the support plate, thereby extending the service life;

[0031] 4. The support arm can ensure that the segment beam can slide vertically upward, and the spring block can achieve a spring effect through the spring piece. By virtue of the deformation recovery of the spring block, the segment beam can be supported in a limited position. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the adjustment bracket structure of the lifting station in this application;

[0033] Figure 2 It is a schematic diagram of the guide rail structure in place of the lifting station of this application;

[0034] Figure 3 yes Figure 2 Schematic diagram of the structure of the hidden spring block;

[0035] Figure 4 This is a schematic diagram of the bridge structure before the lifting station is closed in this application;

[0036] Figure 5 This is a schematic diagram of the state structure of step S1 in the closing construction method of this application;

[0037] Figure 6 This is a schematic diagram of the state structure of step S2 in the closing construction method of this application;

[0038] Figure 7 This is a schematic diagram of the state structure of step S3 in the closing construction method of this application;

[0039] Figure 8 This is a schematic diagram of the state structure of step S4 in the closing construction method of this application;

[0040] Figure 9 This is a schematic diagram of the state structure of step S5 in the closing construction method of this application;

[0041] Figure 10 This is a schematic diagram of the state structure of step S6 in the closing construction method of this application;

[0042] Figure 11 This is a schematic diagram of the state structure of step S7 in the closing construction method of this application;

[0043] Figure 12 This is a schematic diagram of the state structure of step S8 in the closing construction method of this application;

[0044] Description of reference numerals:

[0045] 100. Bridge pier; 200. Bridge frame; 300. Closing section; 400. Support column; 500. Lifting truss; 510. Through-hole jack; 520. Lifting rope; 530. Stabilizing frame; 600. Adjusting bracket; 610. Bridge deck; 620. Support plate; 630. Rotating shaft; 640. Fixed seat; 641. Sliding guide rail; 650. Pull rope mechanism; 651. Driving member; 652. Steering wheel; 653. Pull rope; 654. Attachment plate; 700. Positioning guide rail; 710. Support arm; 720. Attachment block; 721. Spring-loaded block; 722. Spring-loaded member; 730. Moving trough; 800. Anchor buoy; 900. Vessel; 910. Segmental beam. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-12 , further details of this application are given.

[0047] Example 1: An above-water segment beam lifting station, referring to Figure 4The bridge piers 100 and the bridge frames 200 mounted on them are arranged in two straight lines extending from opposite sides of the riverbank toward the center of the river. A closing section 300 is formed between the two bridge frames 200. Support columns 400 are installed near the closing section 300 on the piers 100. The support columns 400 are temporary and serve to strengthen the support and stability of the bridge frames 200 on both sides of the closing section 300. The support columns 400 need to be removed after the segmental beam 910 is closed.

[0048] Reference Figure 7 and Figure 8 Lifting trusses 500 are installed on the bridge frame 200 on both sides of the closure section 300. A through-hole jack 510 is installed at the end of the lifting truss 500 located in the closure section 300. Lifting steel cables 520 are movably mounted on the through-hole jack 510. The ends of the lifting steel cables 520 on both sides facing the water surface are connected to a stabilizing frame 530. The stabilizing frame 530 is a single-layer beam structure with the same length and width as the segmental beam. It is used to secure the stabilizing frame 530 to the segmental beam 910 and increase the connection area. Multiple lifting connectors (not shown) are installed between the stabilizing frame 530 and the segmental beam 910 to ensure a fixed connection, thereby improving the safety and stability of the segmental beam 910 during the lifting process. The reason for installing the stabilizing frame 530 is that when the segmental beam 910 is directly hoisted, there are too few hoisting points. When the segmental beam 910 is hoisted, if its posture is not in a horizontal state, it will cause the tension of the single hoisting steel rope 520 to be too large, and in severe cases, it may even cause the hoisting steel rope 520 to break. After installing the stabilizing frame 530, the segmental beam 910 has more hoisting points, and the stabilizing frame 530 is easier to adjust its posture to a horizontal position than the heavy segmental beam 910, thereby improving the safety and stability of the hoisting of the heavy segmental beam 910.

[0049] Reference Figure 1 and Figure 8An adjustable bracket 600 is provided below the hoisting truss 500. The adjustable bracket 600 includes a bridge deck 610, a support plate 620, and a fixed base 640. A sliding guide rail 641 is provided within the fixed base 640. The fixed base 640 is fixedly mounted on the bridge deck 610. The support plate 620 is rotatably connected to the sliding guide rail 641 via a rotating shaft 630. One side of the support plate 620 extends outward along one end of the bridge deck 610. A pull rope mechanism 650 is provided on one side of the fixed base 640. The pull rope mechanism 650 includes a driving member 651, a steering wheel 652, and a pull rope 653. The pull rope mechanism 650 is provided with a set of pull ropes located on both sides of the sliding guide rail 641. One end of the pull rope 653 is movably connected to the driving member 651, and the other end is fixedly connected to the rotating shaft 630. The steering wheel 652 is in contact with the pull rope 653, and the driving member 651 controls the rotating shaft 630 to slide left and right along the sliding guide rail 641 through the pull rope 653. In the embodiment of the present application, the driving member 651 adopts a rotary motor, and the driving member 651 can realize forward or reverse rotation.

[0050] To effectively horizontally position the support plate 620 during operation, a receiving plate 654 is provided on the other side of the fixing base 640 relative to the rope-pulling mechanism 650. The support plate 620 can be horizontally positioned when it abuts against the receiving plate 654. When the through-hole jack 510, via the hoisting steel rope 520, lifts the segmented beam 910 on the stabilizing frame 530 until it touches the support plate 620, the support plate 620 flips upward so that the bottom surface of the segmented beam 910 is higher than the support plate 620. At this point, the support plate 620 freely falls and is horizontally supported by the bridge deck 610 at the bottom of the segmented beam 910. Considering that the support plate 620 needs to be flipped during actual use, in order to effectively reduce the friction between the rotating shaft 630 and the sliding guide rail 641, and at the same time reduce the direct contact force between the receiving plate 654 and the support plate 620, a lubricating layer (not shown in the figure) is provided on the moving guide rail and the receiving plate 654. In the embodiment of the present application, the lubricating layer is coated with a polytetrafluoroethylene coating to improve the service life of the adjustment bracket 600.

[0051] It should be noted that in the embodiment of the present application, one adjusting bracket 600 is provided on each side of the bridge frame 200. In actual construction, when the bridge frame 200 is wide enough, multiple adjusting brackets 600 can be provided, arranged horizontally and transversely. Multiple support plates 620 provide overall support for the segmental beam 910, providing greater stability. The embodiment of the present application does not specifically limit the number of adjusting brackets 600 provided during implementation.

[0052] Reference Figure 8A positioning guide rail 700 is vertically arranged between the adjusting corbel 600 and the lifting truss 500. The positioning guide rail 700 is used when the segment beam 910 is supported on the adjusting corbel 600. It can continue to slide vertically upward along the positioning guide rail 700 under the lifting action of the lifting steel rope 520 until it is lifted to be flush with the bridge frames 200 on both sides.

[0053] Reference Figure 1 and Figure 2 The positioning guide rail 700 includes a support arm 710 and a receiving block 720. A movable groove 730 for the sliding of the segment beam 910 is formed in the support arm 710. The receiving block 720 is located at the end position facing the lifting truss 500. The receiving block 720 is located on one side of the movable groove 730 and is movably hinged with a spring block 721. A spring member 722 is provided between the spring block 721 and the receiving block 720. In the embodiment of the present application, the spring-pressing piece 722 is a telescopic spring, and a plurality of springs are arranged in an array. When the segment beam 910 is lifted vertically upward along the moving groove 730, when the segment beam 910 abuts against the spring-pressing block 721, the spring-pressing block 721 retracts toward the receiving block 720 using the spring-pressing piece 722. At this time, the segment beam 910 can continue to be lifted upward; when the bottom surface of the segment beam 910 is higher than the spring-pressing block 721, the spring-pressing block 721 deforms and recovers to abut against the bottom of the segment beam 910, thereby achieving stable support for the segment beam 910.

[0054] It should be noted that the lower part of the movable groove 730 is slightly wider than the upper part, which facilitates the throttling section to enter the movable groove 730, so that the segment beam 910 can be accurately positioned during the lifting process, which is simple and convenient, and realizes reliable operation of the equipment.

[0055] Example 2: A method for assembling an overwater segmental beam, comprising the following steps:

[0056] S1: Using GPS positioning, an anchor buoy 800 is set at the position of the closure section 300 as a reference mark for the vessel 900;

[0057] S2: The vessel 900 transports the segmental beam 910 to the predetermined position of the anchoring buoy 800 by means of a power tugboat and a power boat, and adjusts the segmental beam 910 so that it is directly below the area to be closed.

[0058] S3: Install the lifting trusses 500 on the bridge frames 200 on both sides of the closure section 300, install the through-hole jacks 510 on the lifting trusses 500, and install the adjustment brackets 600 below the lifting trusses 500;

[0059] S4: Install the lifting rope 520 on the through-hole jack 510, and horizontally install the stabilizing frame 530 at the end of the lifting rope 520 facing the segment beam 910. The stabilizing frame 530 is located directly above the segment beam 910. The stabilizing frame 530 and the segment beam 910 are fixedly connected by multiple lifting connectors, thereby improving the safety and stability of the segment beam 910 during the lifting process;

[0060] S5: Perform the first lifting. The through-hole jack 510 controls the segment beam 910 to be lifted to the adjustment bracket 600 through the lifting rope 520 for temporary placement. The support plate 620 is horizontally supported on the bottom of the segment beam 910 by the bridge deck 610 to achieve overall support.

[0061] S6: Remove the stabilizing frame 530 to complete the force transfer. At the same time, reconnect the lifting rope 520 to the segment beam 910 and install the positioning guide rail 700. Use the rope pulling mechanism 650 to adjust the horizontal position of the support plate 620 and the segment beam 910 above it so that the upper part of the segment beam 910 is aligned with the lower part of the positioning guide rail 700, completing the first position adjustment before the segment beam is closed.

[0062] S7: The through-hole jack 510 continues to control the segment beam 910 to move upward along the moving groove 730 of the positioning guide rail 700 through the lifting steel rope 520, so that the bottom of the segment beam 910 is supported on the spring block 721. At the same time, the adjustment bracket 600 is removed, thus completing the second position adjustment before closing. At this time, the segment beam 910 is flush with the bridge frames 200 on both sides.

[0063] S8: When the ambient temperature reaches the required closing temperature, closing welding is carried out, and then the guide rail 700 is removed to complete the closing of the steel bridge.

[0064] It should be noted that, since the segment beam 910 is relatively long in the embodiment of the present application, the vessel 900 can be arranged to be shipped by at least two ships according to actual transportation conditions, and each ship is connected and fixed by a connector.

[0065] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. An above-water segment beam lifting station, comprising a bridge pier (100) and a bridge frame (200) arranged on the bridge pier (100), a closing section (300) being formed between the bridge frames (200), and a support column (400) for auxiliary support of the bridge frame (200) being arranged at a position of the bridge pier (100) near the closing section (300), characterized in that: A hoisting truss (500) is respectively provided on the bridge frame (200) on both sides of the closure section (300), a through-hole jack (510) is provided on the hoisting truss (500), a hoisting steel rope (520) is movably installed on the through-hole jack (510), and ends of the hoisting steel ropes (520) on both sides facing the water surface are commonly connected to a stabilizing frame (530) for connecting the segment beam (910); An adjusting bracket (600) is provided below the hoisting truss (500), and the adjusting bracket (600) includes a bridge deck (610) and a support plate (620). The support plate (620) is rotatably connected to the bridge deck (610) via a rotating shaft (630). One side of the support plate (620) extends outward along one end of the bridge deck (610). When the through-hole jack (510) lifts the segment beam (910) on the stabilizing frame (530) through the hoisting steel rope (520) and touches the support plate (620), the support plate (620) flips upward so that the bottom surface of the segment beam (910) is higher than the support plate (620). At this time, the support plate (620) falls freely through the bridge deck (610) and is horizontally supported on the bottom of the segment beam (910). A positioning guide rail (700) is vertically provided between the adjusting bracket (600) and the hoisting truss (500), and the segment beam (910) is lifted along the positioning guide rail (700) to be flush with the bridge frames (200) on both sides; The adjusting bracket (600) further comprises a fixed seat (640), wherein a sliding guide rail (641) for mounting the rotating shaft (630) is provided in the fixed seat (640), and a pull rope mechanism (650) is provided on one side of the fixed seat (640), wherein the pull rope mechanism (650) comprises a driving member (651), a steering wheel (652) and a pull rope (653), and the pull rope mechanism (650) is provided with a group of pull ropes respectively located on both sides of the sliding guide rail (641), wherein one end of the pull rope (653) is movably connected to the driving member (651), and the other end is fixedly connected to the rotating shaft (630), and the steering wheel (652) is in contact with the pull rope (653), and the driving member (651) controls the rotating shaft (630) to move back and forth along the sliding guide rail (641) through the pull rope (653); A receiving plate (654) is provided on the other side of the fixing seat (640) relative to the rope pulling mechanism (650), and the support plate (620) abuts against the receiving plate (654) to achieve horizontal arrangement; The positioning guide rail (700) includes a support arm (710) and a receiving block (720). A movable groove (730) for sliding the segment beam (910) is formed in the support arm (710). The receiving block (720) is located at the end facing the hoisting truss (500). The receiving block (720) is located on one side of the movable groove (730) and is movably hinged with a spring block (721). A spring member (722) is provided between the spring block (721) and the receiving block (720). When the segment beam (910) abuts against the spring-pressing block (721), the spring-pressing block (721) retracts toward the receiving block (720) using the spring-pressing piece (722); when the bottom surface of the segment beam (910) is higher than the spring-pressing block (721), the spring-pressing block (721) deforms and returns to abut against the bottom of the segment beam (910).

2. The above-water segment beam lifting station according to claim 1, characterized in that: A lubricating layer is provided on the sliding guide rail (641) and the receiving plate (654).

3. A method for closure construction of an overwater segmental beam, characterized by: The above-water segment beam lifting station according to claim 1 comprises the following steps: S1: Using GPS positioning, an anchor buoy (800) is set at the position of the closure section (300) as a reference mark for the vessel (900) to transport the vessel; S2: The vessel (900) transports the segment beam (910) to the predetermined position of the anchor buoy (800) by means of a power tugboat and a power boat, and adjusts the segment beam (910) so that it is located directly below the area to be closed; S3: Installing a hoisting truss (500) on the bridge frames (200) on both sides of the closure section (300), installing a through-hole jack (510) on the hoisting truss (500), and installing an adjustment bracket (600) below the hoisting truss (500); S4: Installing the hoisting steel rope (520) on the through-hole jack (510), horizontally installing the stabilizing frame (530) at the end of the hoisting steel rope (520) toward the segment beam (910), the stabilizing frame (530) being located directly above the segment beam (910), and the stabilizing frame (530) and the segment beam (910) being fixedly connected via a plurality of hoisting connectors, thereby improving the safety and stability of the segment beam (910) during the hoisting process; S5: Perform the first lifting, the through-hole jack (510) controls the segment beam (910) to be lifted to the adjustment bracket (600) through the lifting rope (520) for temporary placement, and the support plate (620) is horizontally supported on the bottom of the segment beam (910) through the bridge deck (610) to achieve overall support; S6: Remove the stabilizing frame (530) to complete the force conversion, and at the same time reconnect the hoisting steel rope (520) to the segment beam (910), and install the positioning guide rail (700). Adjust the horizontal position of the support plate (620) and the segment beam (910) above it through the rope pulling mechanism (650) so that the upper part of the segment beam (910) is aligned with the lower part of the positioning guide rail (700), completing the first position adjustment before the segment beam is closed; S7: The through-hole jack (510) continues to control the segment beam (910) to be lifted upward along the moving groove (730) of the positioning guide rail (700) through the lifting rope (520), so that the bottom of the segment beam (910) is supported on the spring block (721), and the adjustment bracket (600) is removed at the same time, thereby completing the second position adjustment before closing. At this time, the segment beam (910) is flush with the bridge frames (200) on both sides; S8: When the ambient temperature reaches the temperature required for closing, closing welding is performed, and then the guide rails (700) are removed to complete the closing of the steel bridge.

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