Swing method for vertical lifting of edge span beam segments

Abstract

The application provides a swinging vertical lifting installation method of a side span beam section, solves the problem that a transport ship and a transport vehicle cannot be directly positioned due to silt of a cable tower located in a tidal flat, transports segmented beam sections to the vicinity of the cable tower through the transport ship, hoists a single segmented beam section to a platform in a swinging manner, adjusts the beam section from a horizontal state to a vertical state, hoists the beam section from a side span side of the cable tower to a midspan side of the cable tower in a swinging manner, and assembles multiple segmented beam sections of the same single span in a vertical direction, so that the vertical space can be fully utilized for construction, the hardening area of a site is reduced, the erection area of a support is reduced, the input of support materials is reduced, and the labor and mechanical costs of support erection and removal are reduced.

Description

Technical Field

[0001] This application relates to the field of construction technology for side span beam segments, and in particular to a swing-type vertical lifting and installation method for side span beam segments. Background Technology

[0002] The construction method of suspension bridges was invented in the early 19th century, and many bridges use this structure. Modern suspension bridges evolved from cable-stayed bridges. They are mainly used for long-span and extra-long-span highway bridges; all long-span bridges today use this structure, making it the main form of long-span bridges.

[0003] Long-span suspension bridges often have high navigation clearance and a large height difference between the steel beams and the platform. Due to the terrain conditions, the height of the steel beams at the base of the side span towers from the platform is often also large. Therefore, the erection of scaffolding involves large material investment, high operational safety risks, and long construction periods. Especially for the cable-mounted crane method, there are also costs for equipment rental, steel beam transport slides and access roads in the yard, foundation treatment, installation, dismantling, and evacuation procedures, making the cost even higher. Summary of the Invention

[0004] The purpose of this application is to provide a swing-type vertical lifting installation method for side span beam segments. By converting the horizontal splicing of beam segments into vertical splicing, the usable area of ​​the horizontal platform is reduced, the hardened area of ​​the site is reduced, the area of ​​the support structure is reduced, the investment in support materials and the labor and machinery costs for support erection and dismantling are reduced, and construction costs are greatly saved.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] This application relates to a swing-type vertical lifting and installation method for a side span beam segment, wherein the side span beam segment includes at least one span beam segment, and the single span beam segment is divided into multiple single beam segments along the longitudinal direction of the bridge. The swing-type vertical lifting and installation method includes the following steps:

[0007] S001. The first beam segment of the side span to be constructed is lifted vertically from the transport ship located on the middle span side, and the lifted beam segment is swung towards the side span side to the platform of the tower near the middle span side.

[0008] S002. One end of the beam segment placed on the side platform of the middle span is used as the fulcrum for connecting with the platform, and the other end is moved upward to rotate the beam segment and make the beam segment rotate to a vertical state.

[0009] S003. Hoist the beam segment from the middle span side of the tower to the side span side, and place the beam segment on the pre-set ground sliding support on the side span side;

[0010] S004. Move the beam segments that have fallen onto the ground sliding support on the side of the span section by section to the side span docking and assembly point, and splice the individual beam segments section by section in the vertical direction to form a whole.

[0011] S006. Vertically lift the assembled single-span side span beam segment to the design height, change the side span beam segment from a vertical state to a horizontal state, adjust the height of the side span beam segment so that its end near the side span rests on the top of the auxiliary pier, and its end near the middle span is connected by slings to complete the installation of the single-span side span beam segment.

[0012] Further features: The single beam segment is provided with rotating lugs at both ends along the longitudinal direction of the bridge, and each single beam segment is provided with a rotating hinge at the end near the side span for connection with a pre-set steering bracket on the platform.

[0013] Further configuration: In S001, the single beam segment inside the transport ship is lifted by a cable-mounted crane installed on the main cable in the middle span, and a winch is provided on the lower crossbeam of the tower to connect with the single beam segment and pull the beam segment to a platform near the middle span side of the tower.

[0014] Further configuration: In S002, the rotating lug on the end of the beam segment near the mid-span serves as the lifting point, and the rotating hinge at the other end is connected to the steering bracket as a fulcrum. The cable-mounted crane located on the main cable of the mid-span is connected to the rotating lug of the single beam segment as the lifting point. The cable-mounted crane lifts the single beam segment upward so that the single beam segment rotates around the rotating hinge to a position at the designed angle with the platform.

[0015] Further setup: After the single beam segment rotates to the designed angle with the platform, the winch set on the lower crossbeam of the tower is connected to the rotating lug near the rotating hinge end of the single beam segment. The connection between the rotating hinge of the single beam segment and the rotating support on the platform is then released. The winch slowly releases the rope from the single beam segment, causing it to rotate around the end connected to the cable-mounted crane toward the mid-span side to achieve a vertical state. The connection between the winch and the rotating support located at the bottom of the single beam segment is then released.

[0016] Further setting: The design angle is 60° with the platform.

[0017] Further configuration: A winch is installed on the platform on the side span of the tower. The winch is connected to the rotating lug at the top of the single beam segment to pull the single beam segment over the lower crossbeam of the tower until it falls onto the ground sliding support set on the side span of the tower.

[0018] Further configuration: When the side span beam segment includes two side span beam segments, the first side span beam segment near the discontinuous end of the side span is constructed first according to steps S001 to S005. The sling at the end of the first side span beam segment is a temporary sling set on the main cable on the side of the side span.

[0019] When the construction approaches the second span side span beam segment on the side of the midspan, the welding and assembly of the second span side span beam segment is completed according to the steps S001 to S004, the second span side span beam segment is lifted along the vertical direction to the design height, and the vertical state of the second span side span beam segment is adjusted to the horizontal state, the height of the second span side span beam segment is adjusted to the height of the first span beam segment, the adjacent ends of the first span beam segment and the second span beam segment are welded, and the end of the second span beam segment close to the continuous end of the side span is connected with the sling.

[0020] Further provided is that the first span side span beam segment comprises a plurality of non-sling beam segments, the second span side span beam segment comprises a plurality of non-sling beam segments and one sling beam segment, and the sling beam segment is arranged close to the side of the midspan.

[0021] Further provided is that the sling beam segment is connected with the first pair of slings of the midspan main cable.

[0022] Compared with the prior art, the scheme of the present application has the following advantages:

[0023] 1. In the oscillating vertical lifting installation method of the side span beam segment involved in the present application, the segmented beam segments are transported to the vicinity of the cable tower by the transport ship, the single beam segment is hoisted to the platform in the oscillating manner, the beam segment in the horizontal state is adjusted to the vertical state, and the beam segment is hoisted from the side of the midspan of the cable tower to the side of the side span in the oscillating manner, thereby solving the problem that the cable tower is located in the tidal flat, and the silt causes the transport ship and the transport vehicle to be unable to be directly positioned.

[0024] 2. In the oscillating vertical lifting installation method of the side span beam segment involved in the present application, the plurality of beam segments of the same single span are assembled in the vertical direction, the vertical space can be fully utilized for construction, the hardening area of the site is reduced, the erection area of the support is reduced, and the input of the support material and the labor and mechanical cost of the erection and removal of the support are reduced.

[0025] 3. In the oscillating vertical lifting installation method of the side span beam segment involved in the present application, the oscillating process of the beam segment is divided into two sections, the oscillating angle of the beam segment can be controlled within a reasonable range, and the instability of the hoisting of the cable crane caused by the too large oscillating angle is avoided.

[0026] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0028] Figure 1Process flow chart of the sway-type vertical lifting installation method of the side span beam segment of the present application;

[0029] Figure 2 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which a single beam segment is hoisted from a transport ship to a midspan side platform in a cable tower;

[0030] Figure 3 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which a single beam segment is turned from a horizontal state to a vertical state;

[0031] Figure 4 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which a single beam segment is swayed from a midspan side to a side span side;

[0032] Figure 5 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which adjacent single beam segments are butted in a vertical direction;

[0033] Figure 6 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which the vertical state of a single-span side span beam segment is adjusted to a horizontal state;

[0034] Figure 7 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which a second-span side span beam segment is hoisted;

[0035] Figure 8 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which the vertical state of a second-span side span beam segment is adjusted to a horizontal state;

[0036] Figure 9 Schematic diagram of the sway-type vertical lifting installation method of the side span beam segment of the present application, in which the construction of a side span beam segment is completed.

[0037] In the figure, 1, single beam segment; 2, transport ship; 3, cable crane; 4, winch; 5, turning support; 6, vertical lifting station; 7, ground sliding support; 8, temporary sling. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as a limitation on the present application.

[0039] Please refer to Figures 1 to 9For the construction of a large-span single-span hanging cable full-floating system suspension bridge, the application discloses a swing type vertical lifting installation method for a side span beam segment, which changes horizontal surface assembly of the beam segment into vertical surface assembly, reduces the hardening area of the site, reduces the input of support materials and the labor and mechanical cost of support erection and removal, improves the construction efficiency, and shortens the construction period.

[0040] The suspension bridge to be constructed in the embodiment includes a main cable, a cable tower, a hanging cable, a pier column and a deck system structure. The deck system structure of the embodiment has a total of 96 beam segments, wherein the tower-side beam segments to be constructed have a total of 7 on a single side, including 6 beam segments without a hanging cable and 1 beam segment with a hanging cable. The beam segment with the hanging cable is arranged at the connecting end of the side span, i.e., close to the side of the main span, and is connected with the first pair of hanging cables of the main cable of the main span. In addition, the cable tower of the embodiment is located in a tidal flat, and it is difficult for the transport ship 2 and the transport vehicle to be directly positioned. Therefore, in the embodiment, the segmented side span beam segments are transported to the bridge site by the transport ship 2. Due to the influence of navigation conditions, the transport ship 2 is anchored in the sea area 56.9 m away from the cable tower, and the cable load crane 3 installed on the main cable of the main span is used to cooperate with the transport beam segment.

[0041] Please refer to Figure 1 The swing type vertical lifting installation method for the side span beam segment of the application specifically includes the following steps:

[0042] S001, the first beam segment of the side span to be constructed is vertically lifted from the transport ship 2 located on the side of the main span, and is swung to the platform close to the side of the main span on the cable tower.

[0043] Please refer to Figure 2 The cable load crane 3 installed on the main cable of the main span is used to lift the single beam segment 1 of the side span, and the winch 4 arranged on the lower cross beam of the cable tower is used to pull the single beam segment 1 lifted by the cable load crane 3 to swing to the side of the side span. Considering that the transport ship 2 is parked at a position 56.9 m away from the cable tower, the swinging angle of the beam segment in the embodiment is 18°, and the horizontal distance of the swinging is 47.8 m, so as to pull the lifted single beam segment 1 along the bridge to the platform close to the side of the main span on the cable tower.

[0044] In addition, the single beam segment 1 lifted by the application is provided with a rotating lifting lug on both sides thereof in the transverse direction of the bridge, and a rotating hinge is further arranged on one side thereof. The lifting crane is connected with the rotating lifting lug to lift the beam segment, and the beam segment can also rotate around the rotating hinge as a fulcrum.

[0045] It should be noted that the platform of the application includes but is not limited to a ground surface after hardening treatment, a construction platform built on the original ground surface, etc. The platform needs to meet the bearing capacity of the beam segment.

[0046] S002. One end of the beam segment placed on the side platform of the middle span is used as the fulcrum for connecting with the platform, and the other end is moved upward to rotate the beam segment, so that the beam segment rotates to a vertical state.

[0047] Please combine Figure 3 In this application, a steering support 5 is installed on a platform near the mid-span side of the tower. A single beam segment 1 is traction-swung onto the platform near the mid-span side of the tower, with the end of the single beam segment 1 near the mid-span serving as its lifting point. The other end is equipped with a rotating hinge as a fulcrum for connection to the platform, and the rotating hinge on the single beam segment 1 is connected to the pre-installed steering support 5 on the platform. The cable-mounted crane 3 on the mid-span main cable moves towards the tower and anchors near the first pair of suspenders on the mid-span main cable near the tower. The cable-mounted crane 3 lifts the steel strand bundle and lowers it to the platform, connecting the steel strand bundle to the rotating lug at the end of the single beam segment 1 away from its rotating hinge.

[0048] The cable-mounted crane 3 winds up its steel strand bundle to lift the single beam segment 1 and the end connected to it upwards away from the platform. The end of the single beam segment 1 connected to the rotating support then rotates around the rotating support until the single beam segment 1 is rotated to a position at the designed angle with respect to the platform. In this embodiment, considering the weight of the single beam segment 1 and the climbing angle of the cable-mounted crane 3, the angle formed between the single beam segment 1 and the platform under the lifting of the cable-mounted crane 3 is 60°.

[0049] The winch 4, mounted on the lower crossbeam of the tower, is connected to the rotating lug near the rotating hinge end of the rotated single beam segment 1. The winch 4 winds up the rope to ensure that the wire rope connecting it to the single beam segment 1 is taut. Then, the connection between the rotating hinge and the rotating support of the single beam segment 1 is released. At this point, both ends of the single beam segment 1 are lifted by the cable-mounted crane 3 and the winch 4 on the lower crossbeam respectively to support and maintain it at a 60° angle with the platform. Next, the winch 4 on the lower crossbeam slowly releases the rope, while the cable-mounted crane 3 simultaneously lifts the single beam segment 1 upwards, causing it to detach from the platform and rotate around the side connected to the cable-mounted crane 3 toward the mid-span side until it reaches a vertical position. Then, the connection between the winch 4 and the rotating lug at the bottom of the single beam segment 1 is released. In this application, when rotating the beam segment, the beam segment is first supported by a platform. After the limit is released, the beam segment will quickly return to its original position under its own weight. The end of the beam segment is then slowly lowered by a winch 4. This avoids a sudden increase in the tension of the cable crane due to the rapid return of the beam segment, thus protecting the cable crane 3. In addition, in this embodiment, two 10t winches 4 are installed on the lower crossbeam of the tower to meet the traction requirements of a single span beam segment.

[0050] S003. Lift the vertical single beam segment 1 upward to the lower crossbeam above the tower, pull the single beam segment 1 over the lower crossbeam of the tower to swing from the middle span side to the side span side, and let the single beam segment 1 land on the ground sliding support 7 preset on the side span side.

[0051] Specifically, please combine Figure 4 First, the single beam segment 1, which is in a vertical state, is lifted to a position more than 5m above the lower crossbeam by the cable crane 3. At the same time, a winch 4 is set on the platform on the side of the span, and the wire rope of the winch 4 is connected to the rotating lug at the end of the suspended single beam segment 1 and the cable crane 3.

[0052] The winch 4 on the platform winds up the rope, while the cable-mounted crane 3 simultaneously releases the rope. The winch 4 pulls the single beam segment 1 over the lower crossbeam of the tower, swinging it from the middle span to the side span, so that the single beam segment 1 lands on the ground sliding support 7 set on the side span of the tower. Then, the cable-mounted crane 3 is disconnected from the single beam segment 1, and the winch 4 on the platform pulls the single beam segment 1 to the side span splicing point, so that the single beam segment 1 can be spliced ​​with its adjacent beam segment.

[0053] S004. Once the beam segment has been moved to the side span docking assembly point of the ground sliding support 7, the connection between the cable-mounted crane 3 installed on the main cable of the middle span and the beam segment is released. At the same time, a vertical lifting station 6 is installed on the main cable of the side span, and the wire rope of the vertical lifting station 6 is connected to the rotating lug at the top of the single beam segment 1 located at the side span docking assembly point. The single beam segment 1 is then lifted vertically to the design height.

[0054] Subsequently, repeat steps S001 to S003 above, transferring the next single beam segment 1 from the transport ship 2 to the side span assembly point of the ground sliding support 7, lowering the hoisted single beam segment 1 to the top surface of the next single beam segment 1, adjusting the linearity of the two single beam segments 1, and then welding them into a whole. Specific details can be combined with... Figure 5 .

[0055] It should be noted that for the first beam segment, when transported to the side span assembly point of the ground sliding support 7, it only needs to be lifted to the design height via the vertical lifting station 6. However, for the beam segments to be assembled later, when moved to the side span assembly point of the ground sliding support 7, it is necessary to wait for the beam segments suspended above the side span assembly point to be lowered to the top of the beam segments to be assembled, adjust their positions, and then weld them into a whole. That is, this application reduces the use of horizontal assembly space, reduces the hardened area of ​​the site, and reduces the input of support materials and the labor and machinery costs for support erection and dismantling by transporting individual beam segments 1 to the side span assembly point of the ground sliding support 7 one by one and completing the assembly between adjacent beam segments in the vertical direction.

[0056] In addition, when the two adjacent single-beam segments 1 are butt-jointed, the relative vertical positions between the adjacent beam segments can be limited by the corbels arranged on the upper beam segment and the lower single-beam segment 1, and meanwhile, three-way adjusting devices are arranged to adjust the relative horizontal positions between the steel box beams of the two adjacent beam segments, so that the two adjacent beam segments can be welded into a whole by the circumferential welds after being adjusted to the assembly line type.

[0057] In the embodiment, considering the length of the single-beam segment 1 along the bridge direction (i.e. the height of the single-beam segment 1 after being erected), the height of the first single-beam segment 1 is increased to about 12 m, and the height of the first single-beam segment 1 needs to be increased by about 24 m away from the platform after the second single-beam segment 1 is assembled, so that the height of the first single-beam segment 1 needs to be increased upward by each single-beam segment 1 to be assembled, so as to leave enough construction space for the assembly of the subsequent single-beam segment 1.

[0058] The above steps are repeated to complete the assembly of the single-span beam segment required for construction.

[0059] S005、Please combine Figure 6 At least two vertical lifting stations 6 are installed on the main cable, one of which is connected with the rotating lifting lug of the first beam segment during the assembly of the beam segment, and the remaining vertical lifting stations 6 are connected with the rotating lifting lug at the bottom of the beam segment in the vertical state. The single-span side span beam segment assembled into a whole is lifted vertically to the design height, the vertical lifting station 6 connected with the rotating lifting lug at the top of the single-span beam segment stops lifting, and the vertical lifting station 6 connected with the rotating lifting lug at the bottom of the single-span beam segment continues to lift the beam segment upward, so that the single-span beam segment rotates upward around the top thereof to turn the side span beam segment from the vertical state to the horizontal state, the height of the side span beam segment is adjusted to make the end thereof close to the side span side fall on the top of the auxiliary pier, and the end thereof close to the midspan side is connected by a sling, thereby completing the installation of the single-span side span beam segment.

[0060] Considering the maximum lifting height and bearing requirement of the vertical lifting station 6, the single-span beam segment constructed in the embodiment is not more than four single-beam segments 1. In the case that the number of segments of the side span beam segment is large, the whole side span beam segment can be divided into multiple spans for construction, i.e. the side span beam segment of the application at least includes one span side span beam segment, each span side span beam segment includes multiple single-beam segments 1, and the single-beam segments 1 of each span side span beam segment are not more than four.

[0061] The total number of the single-side edge span beam segments of the embodiment is known to be 7, so the two-span edge span beam segments are constructed. Specifically, the first-span edge span beam segment close to the discontinuous end of the edge span is constructed according to the steps S001 to S006. The first-span edge span beam segment includes 3 cable-free beam segments. The end of the first-span edge span beam segment close to the discontinuous end of the edge span is supported on the auxiliary pier top, and the other end is hoisted by the cable to be fixed. Since the edge span beam segments of the present application are constructed in two spans, the cable of the first-span edge span beam segment is a temporary cable 8 arranged on the main cable of the edge span side. Specifically, the vertical lifting station 6 originally used to hoist the end is modified.

[0062] Please refer to Figure 7 and Figure 8 The second-span edge span beam segment of the embodiment includes 3 cable-free beam segments and 1 cable beam segment. The end of the second-span edge span beam segment abutting the first-span edge span beam segment is a cable-free beam segment, and the cable beam segment is arranged close to the continuous end of the edge span. When the second-span edge span beam segment is constructed, the assembly of the 4 beam segments of the second-span edge span beam segment is completed according to the steps S001 to S005. The cable beam segment is the last single beam segment 1 to be assembled. The second-span edge span beam segment is hoisted by two vertical lifting stations 6, and one of the vertical lifting stations 6 is located at the main cable of the midspan. The second-span edge span beam segment is first lifted vertically to the design height. The vertical lifting station 6 located at the edge span side stops lifting, and the vertical lifting station 6 located at the midspan side continues to lift the beam segment upward. The second-span edge span beam segment is rotated to adjust from the vertical state to the horizontal state. Then the horizontal height of the second-span edge span beam segment is adjusted to the abutting end of the first-span edge span beam segment by the vertical lifting station 6. The adjacent ends of the first-span edge span beam segment and the second-span edge span beam segment are welded, and the end of the second-span edge span beam segment close to the continuous end of the edge span is connected to the first pair of cables of the main cable of the midspan side.

[0063] The welding and assembly of the second-span edge span beam segment are completed according to the steps S001 to S005. The second-span edge span beam segment is lifted vertically to the design height, and the vertical second-span edge span beam segment is adjusted to the horizontal state. The horizontal height of the second-span edge span beam segment is adjusted to the abutting end of the first-span edge span beam segment. The adjacent ends of the first-span edge span beam segment and the second-span edge span beam segment are welded and fixed, and the end of the second-span edge span beam segment close to the continuous end of the edge span (i.e. the cable beam segment) is connected to the first pair of cables of the main cable of the midspan side. Subsequently, the temporary cable 8 on the first-span edge span beam segment and the vertical lifting machine, the cable crane 3, etc. on the main cable are removed. The installation of the 7 beam segments of the edge span of the embodiment is completed. Specifically, please refer to Figure 9 .

[0064] In addition, when the first-span edge span beam segment and the second-span edge span beam segment of the embodiment are abutted, if the abutting width is difficult to control, the first-span edge span beam segment can be pushed to adapt to the abutting of the second-span edge span beam segment.

[0065] The swing vertical lifting installation method of the side span beam section of the present application solves the problem that the transportation ship 2 and the transportation vehicle cannot be directly positioned due to the existence of silt when the cable tower is located on a tidal flat. The segmented beam section is transported to the vicinity of the cable tower by the transportation ship 2, the single-section beam section 1 is hoisted to the platform by the swing method, the beam section in the horizontal state is adjusted to the vertical state, and the beam section is hoisted from the side span side of the cable tower to the side span side by the swing method. The multiple beam sections of the same single span are assembled in the vertical direction, the vertical space can be fully utilized for construction, the hardening area of the site is reduced, the erection area of the support is reduced, and the input of the support material and the labor and mechanical cost of the erection and removal of the support are reduced.

[0066] The above only describes some embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A method of erecting a bridge deck section by oscillating vertical lifting, characterised in that, The side span beam section at least comprises a single-span side span beam section, and the single-span side span beam section is divided into multiple single-section beam sections along the bridge longitudinal direction, and rotating hangers are arranged at both ends of the single-section beam section along the bridge longitudinal direction, and the swinging vertical lifting installation method comprises the following steps: S001, vertically lifting the first beam section of the side span to be constructed from the transport ship located on the side of the main span, and swinging the lifted beam section to the platform of the cable tower close to the side of the main span through the winch arranged on the lower cross beam of the cable tower; S002, taking one end of the beam section falling on the platform on the side of the main span as the fulcrum connected with the platform, moving the other end upward to rotate the beam section, and rotating the beam section to the vertical state; S003, lifting the single-section beam section in the vertical state to a position higher than the lower cross beam of the cable tower by using the cable load crane installed on the main cable of the main span, connecting the rotating hanger at the top of the single-section beam section with the winch installed on the side of the side span to pull the single-section beam section to pass above the lower cross beam of the cable tower, lifting the beam section from the side of the main span of the cable tower to the side of the side span, and making the beam section fall on the ground sliding support pre-set on the side of the side span; S004, moving the beam section falling on the ground sliding support on the side of the side span to the side span butt joint assembly place, and assembling the single-section beam sections in the vertical direction to form a whole; S005, vertically lifting the single-span side span beam section assembled into a whole to the design height, rotating the side span beam section from the vertical state to the horizontal state, adjusting the height of the side span beam section to make the end close to the side of the side span fall on the top of the auxiliary pier, and connecting the end close to the side of the main span through the sling, and completing the installation of the single-span side span beam section.

2. The method of installing a span beam segment by jacking and vertical lifting according to claim 1, wherein, The end close to the side of the single-section beam section is provided with a rotating hinge for connecting with the rotating support pre-set on the platform.

3. The method of installing a span beam segment by jacking and vertical lifting according to claim 2, wherein, In the S002, the rotating hanger on the end close to the main span of the beam section is taken as the lifting point, the rotating hinge on the other end is taken as the fulcrum connected with the rotating support, the cable load crane on the main cable of the main span is connected with the rotating hanger of the single-section beam section as the lifting point, and the cable load crane lifts the single-section beam section upward to rotate the single-section beam section to the position with the platform at a design angle.

4. The method of installing a span beam segment by jacking and vertical lifting according to claim 3, wherein, After the single-section beam section is rotated to the position with the platform at a design angle, the rotating hanger on the end close to the rotating hinge of the single-section beam section is connected with the winch arranged on the lower cross beam of the cable tower, the connection between the rotating hinge of the single-section beam section and the rotating support on the platform is released, the winch slowly releases the single-section beam section, the single-section beam section rotates around the end connected with the cable load crane to the side of the main span to reach the vertical state, and the connection between the winch and the rotating hanger at the bottom of the single-section beam section is released.

5. The method of installing a span beam segment by jacking and vertical lifting according to claim 4, wherein, The design angle is 60° with the platform.

6. The method of installing a span beam segment by jacking and vertical lifting according to claim 1, wherein, When the side span beam section comprises a two-span side span beam section, the first-span side span beam section close to the discontinuous end of the side span is constructed according to the steps of S001 to S005, and the sling at the end of the first-span side span beam section is a temporary sling arranged on the main cable on the side of the side span. When the second span side span beam segment near the side of the midspan is constructed, the welding and assembling of the second span side span beam segment is completed according to the steps S001 to S004, the second span side span beam segment is lifted along the vertical direction to the design height, and the vertical state of the second span side span beam segment is adjusted to the horizontal state, the horizontal height of the second span side span beam segment is adjusted to the state that the end thereof is butted with the end of the first span beam segment, the adjacent ends of the first span beam segment and the second span beam segment are welded, and the end of the second span side span beam segment near the continuous end of the side span is connected with the sling.

7. The method of installing a span beam segment by jacking and vertical lifting according to claim 6, wherein, The first span side span beam segment comprises multiple sling-free beam segments, and the second span side span beam segment comprises multiple sling-free beam segments and one sling beam segment, and the sling beam segment is arranged near the midspan.

8. The method of installing a span beam segment by jacking and vertical lifting according to claim 7, wherein, The sling beam segment is connected with the first pair of slings of the main cable of the midspan.

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