An arc-shaped cantilever landscape bridge closure section construction method

Abstract

This application relates to the technical field of steel box girder installation for the closure section of a landscape bridge. Addressing the difficulty in positioning the steel box girder for the closure section, it proposes a method for positioning the closure section of an arc-shaped cantilever landscape bridge. Before installing the closure section steel box girder, a lifting assembly is used to lift the end of the corresponding final standard section steel box girder to form a flared opening. Then, a three-way jack is used to drive the closure section steel box girder downwards and wed it between the two sets of final standard section steel box girders. Finally, the lifting assembly and the three-way jack are used to drive the final standard section steel box girder and the closure section steel box girder downwards together, achieving precise positioning and installation of the closure section steel box girder. This application facilitates the precise positioning and installation of the closure section steel box girder.

Description

Technical Field

[0001] This application relates to the technical field of sectional construction of the closure section of a landscape bridge, and in particular to a method for sectional construction of the closure section of an arched cantilever landscape bridge. Background Technology

[0002] In related technologies, the main beam of the arched landscape bridge is composed of a closure section steel box girder and several standard steel box girder sections set at both ends of the closure section.

[0003] During the construction of the main beam of the arched landscape bridge, such as Figure 1 First, several temporary supports 1 need to be erected on the water surface (for the overlapping of the ends of adjacent steel box girders). Then, the two ends of the standard section steel box girder are overlapped on the two adjacent temporary supports, and the gaps at the ends of the adjacent standard section steel box girders are welded and fixed until the construction of all standard section steel box girders is completed. Finally, the closure section steel box girder is installed between the two standard section steel box girders adjacent to the closure section steel box girder (Note: the standard section steel box girder adjacent to the closure section steel box girder is hereinafter referred to as the "final standard section steel box girder"), and the final standard section steel box girder 3 is welded and fixed to the closure section steel box girder 4 to realize the construction of the main beam of the landscape bridge.

[0004] Due to factors such as installation errors and temperature errors, the steel box girder of the closure section is usually prefabricated with a margin at both ends. When assembling the steel box girder of the closure section, the margin at both ends of the closure section is cut off according to the actual position between the two sets of standard steel box girder segments. Then, it is placed between the two standard steel box girder segments and welded to fix it, thus realizing the placement construction of the steel box girder of the closure section.

[0005] In actual construction, in order to ensure a tight connection between the subsequent closure section steel box girder and the final standard section steel box girder, the construction space for the placement of the closure section steel box girder is extremely small. In addition, the closure section steel box girder is prone to swaying during hoisting, which makes it very easy for the closure section steel box girder to collide with the final standard section steel box girder during the actual hoisting process. This causes damage to both the closure section steel box girder and the final standard section steel box girder, making the placement of the closure section steel box girder quite difficult. Summary of the Invention

[0006] To facilitate the precise placement and construction of the steel box girder of the closure section of an arched landscape bridge, this application provides a method for the placement and construction of the closure section of an arched cantilever landscape bridge.

[0007] This application provides a construction method for the closure section of an arched cantilever landscape bridge, which adopts the following technical solution:

[0008] A construction method for the closure section of an arched cantilever landscape bridge includes the following steps:

[0009] S1: Install lifting components and three-way jacks on the temporary support for the overlap of the final standard section steel box girder and the closure section steel box girder;

[0010] S2: Assembly and construction of the last standard section steel box girder: Move the last standard section steel box girder so that both ends of the last standard section steel box girder are respectively lapped on the corresponding temporary supports; and check and adjust the last standard section steel box girder to the designated installation position;

[0011] S3: Connect the lifting assembly to the last standard section of the steel box girder;

[0012] S4: Installation of the closure section steel box girder: The closure section steel box girder is hoisted above the two sets of final standard section steel box girders and the piston rod of the Z-axis hydraulic cylinder of the three-way jack is connected to the closure section steel box girder.

[0013] S5: Position adjustment of the closure section steel box girder: Adjust the closure section steel box girder to the designated installation position using three-way jacks;

[0014] S6: Cutting the reserved amount of the closure section steel box girder: Cut off the reserved amount at both ends of the closure section steel box girder according to the actual position of the two sets of final standard section steel box girders;

[0015] S7: The corresponding end standard section steel box girder is lifted up near the closure section steel box girder by the lifting component, so that the two sets of end standard section steel box girders form a flared shape.

[0016] S8: Construction of pre-positioning of closure segment steel box girder: The closure segment steel box girder is moved down and embedded between the two sets of final standard segment steel box girders by using three-way jacks;

[0017] S9: Construction of the closure section steel box girder placement: The closure section steel box girder and the last standard section are moved down by three-way jacks and lifting components until they are completely in place;

[0018] S10: Weld and fix both ends of the last standard section steel box girder to the already installed standard section steel box girder and the closure section steel box girder respectively.

[0019] By adopting the above technical solution, the lifting assembly lifts the ends of the corresponding final standard section steel box girders, allowing the ends of the two sets of final standard section steel box girders to form an upward-facing flared opening. This increases the construction space for the closure section steel box girder, facilitating its insertion between the two sets of final standard section steel box girders under the drive of three-way jacks. Subsequently, the lifting assembly and three-way jacks are used to lower the final standard section steel box girder and the closure section steel box girder until they are in place. Compared to the traditional installation method for closure section steel box girders, this method increases the construction space for the closure section steel box girder, making it easier to insert it into the adjacent final standard section steel box girders. Between the standard steel box girders; simultaneously, during the downward movement of the closure steel box girder, both ends of the standard steel box girder can always be pressed against the two sets of final standard steel box girder sections. After the final standard steel box girder section and the closure steel box girder section are in place, the friction generated by the mutual pressing between the final standard steel box girder section and the closure steel box girder section further enhances the load-bearing capacity at the connection between the final standard steel box girder section and the closure steel box girder section. On the other hand, by ensuring that the closure steel box girder section is always pressed against the final standard steel box girder section, the molecules of the final standard steel box girder section and the closure steel box girder section are arranged neatly, the intermolecular forces are greater, and the overall integrity is better after subsequent welding, which is conducive to improving the connection strength between the final standard steel box girder section and the closure steel box girder section.

[0020] Preferably, the lifting assembly includes a lifting jack, the bottom end of which is hinged to a temporary support, and the top end of the piston rod of the lifting jack is hinged to a main connecting plate.

[0021] By adopting the above technical solution, after connecting the main connecting plate to the bottom of the last standard section steel box girder, the piston rod of the lifting jack can be extended and retracted to lift the end of the last standard section steel box girder so that the two adjacent sets of last standard section steel box girders can form a flared shape.

[0022] Preferably, each temporary support used for the overlapping of the ends of the closure section of the steel box girder is vertically equipped with two sets of limiting rods, and the temporary support and the two sets of limiting rods form a limiting groove for the closure section of the steel box girder to be embedded.

[0023] By adopting the above technical solution, when hoisting the closure section of the steel box girder, the closure section of the steel box girder is embedded into the limiting groove formed by the temporary support and the two sets of limiting rods, thereby guiding the closure section of the steel box girder and reducing the large-scale shaking of the closure section of the steel box girder during hoisting. After connecting the piston rod of the Z-direction hydraulic cylinder of the three-way jack to the bottom of the closure section of the steel box girder, the limiting rods are removed, which facilitates the subsequent adjustment of the position of the steel box girder by the three-way jack.

[0024] Preferably, the temporary support for the end splicing of the closure section of the steel box girder is vertically provided with two sets of insertion sleeves corresponding to the two sets of limiting rods, and the bottom ends of the two sets of limiting rods are respectively inserted into the corresponding insertion sleeves.

[0025] By adopting the above technical solution, the limit rod can be detachably connected to the temporary support. After connecting the piston rod of the Z-axis hydraulic cylinder of the three-axis jack to the bottom of the closing section steel box girder, the limit rod can be pulled out from the corresponding insertion sleeve, thus separating the limit rod from the temporary support, making the disassembly and assembly of the limit rod simpler and more convenient.

[0026] Preferably, the specific steps of step S6 are as follows:

[0027] S6.1: Install an infrared positioning device at the end of the last standard section of the steel box girder;

[0028] S6.2: Use an infrared positioning device to project a cutting reference line onto the bottom of the closure section of the steel box girder;

[0029] S6.3: Using the cutting reference line projected by the infrared positioning instrument as a reference, cut off the excess allowance at the end of the closure section of the steel box girder.

[0030] By adopting the above technical solution, when removing the excess material of the closure section steel box girder, construction workers can use the infrared light projected onto the closure section steel box girder by an infrared positioning instrument as a cutting reference line to cut the reserved amount at the end of the closure section steel box girder, making the removal of the reserved amount of the closure section steel box girder more precise.

[0031] Preferably, a construction platform is also provided on top of the temporary support.

[0032] By adopting the above technical solution and setting up a construction platform, subsequent construction personnel can assist in adjusting the position of the final standard section steel box girder and welding and fixing the final standard section steel box girder to the closure section steel box girder on the construction platform. At the same time, it is convenient to install and fix the lifting jacks and three-way jacks on the construction platform.

[0033] Preferably, the outer periphery of the limiting rod is coated with a graphene coating.

[0034] By adopting the above technical solution and setting the graphene coating, the friction between the limiting rod and the closure section steel box girder is reduced, making it less prone to wear between the closure section steel box girder and the limiting rod.

[0035] Preferably, the construction platform is surrounded by protective railings, and the temporary support is also fixed with a ladder located below the construction platform.

[0036] By adopting the above technical solutions and installing guardrails, the safety performance of the construction platform can be improved. The installation of ladders makes it easier for construction workers to climb to the construction platform and reduce the difficulty for them to travel back and forth to the platform.

[0037] In summary, this application includes at least one of the following beneficial technical effects:

[0038] 1. Before installing the closure section steel box girder, the lifting assembly is used to move the ends of the corresponding final standard section steel box girder upwards, so that the ends of the two sets of final standard section steel box girder are close to each other and form an opening. This facilitates the use of three-way jacks to drive the closure section steel box girder into the space between the two sets of final standard section steel box girder. Subsequently, the three-way jacks and the lifting assembly are used to move the ends of the closure section steel box girder and the final standard section steel box girder downwards, thereby achieving precise positioning of the closure section steel box girder. This also reduces the possibility of collisions between the closure section steel box girder and the final standard section steel box girder during the traditional closure section steel box girder installation process. On the other hand, during the downward movement of the final standard section steel box girder and the closure section steel box girder, the closure section steel box girder and the final standard section steel box girder are always in a tight abutment state. This makes it easier for the molecular arrangement of the final standard section steel box girder and the closure section steel box girder to be more orderly and the intermolecular force to be stronger after welding, which is beneficial to improving the welding quality between the final standard section steel box girder and the closure section steel box girder.

[0039] 2. The lifting assembly includes a lifting jack vertically mounted on a support. The piston rod of the lifting jack has a main connecting plate at its top ball joint. After the main connecting plate is connected to the last standard section of the steel box girder, the piston rod of the lifting jack can drive the last standard section of the steel box girder to rise and fall through the main connecting plate.

[0040] 3. Two sets of limiting rods are vertically installed on the support for the lap joint of the final standard section steel box girder and the closure section steel box girder. The two sets of limiting rods form a limiting groove for guiding the closure section steel box girder. When the closure section steel box girder is lowered, the two sets of limiting rods restrict the swaying of the closure section steel box girder, so that the closure section steel box girder can slide smoothly to the designated installation position. Attached Figure Description

[0041] Figure 1 This is a partial schematic diagram of an embodiment of the present application used to construct the main beam of an arched landscape bridge.

[0042] Figure 2 This is a schematic diagram illustrating the state of the steel box girder during the installation of the closure section, as described in the embodiments of this application.

[0043] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0044] Figure 4 This is a schematic diagram of the structure of a temporary support used in the embodiments of this application to illustrate the overlapping of the support for the final standard section of the steel box girder and the closure section of the steel box girder.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Temporary support; 11. Steel pipe pile; 12. Distribution beam; 13. Support rod; 14. Construction platform; 15. Guardrail; 16. Ladder; 17. Insert sleeve; 18. Limiting rod; 2. Installed standard section steel box girder; 3. Last standard section steel box girder; 4. Closing section steel box girder; 5. Lifting jack; 51. Main connecting plate; 6. Three-way jack; 61. Z-axis hydraulic cylinder; 62. Secondary connecting plate. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0048] This application discloses a method for constructing the closure section of an arched cantilever landscape bridge, referring to... Figure 2 and Figure 3 This includes the following steps:

[0049] S1: Install lifting components and three-way jacks 6 on the temporary support 1 for the connection of the final standard section steel box girder 3 and the closure section steel box girder 4.

[0050] Reference Figure 4 The temporary support 1 includes four sets of vertically arranged steel pipe piles 11, which are arranged in a rectangular shape. Horizontal and diagonal bracing members are provided between adjacent steel pipe piles 11. The temporary support 1 also includes two sets of horizontally arranged distribution beams 12. In this embodiment, the distribution beams 12 are I-beams. The distribution beams 12 are fixed to the top of the steel pipe piles 11, and several support rods 13 are vertically fixed to the top of the distribution beams 12. The support rods 13 are used for the overlapping of steel box girders.

[0051] Reference Figure 2 and Figure 3 The temporary support 1 also has a construction platform 14 fixed on it. The construction platform 14 is located between the four sets of steel pipe piles 11 and the outer periphery of the construction platform 14 is fixed to the four sets of steel pipe piles 11.

[0052] The construction platform 14 is surrounded by protective railings 15, with safety nets attached to them. This enhances the safety of the construction platform 14 and allows construction workers to perform related construction operations more safely on the platform. A ladder 16 is also installed at the bottom of the construction platform 14, fixed to the steel pipe piles 11. The ladder 16 facilitates the movement of construction workers to and from the construction platform 14.

[0053] The lifting assembly includes two sets of vertically arranged lifting jacks 5. The bottom end of each lifting jack 5 is ball-jointed on the construction platform 14 of the corresponding temporary support 1, and the top end of the piston rod of each lifting jack 5 is ball-jointed with a main connecting plate 51. A three-way jack 6 is fixedly mounted on the construction platform 14 of the corresponding temporary support 1 at its bottom. The top of the piston rod of the Z-axis cylinder 61 of the three-way jack 6 is vertically fixed with a secondary connecting plate 62.

[0054] Reference Figure 3 and Figure 4 Two sets of limiting rods 18 are vertically installed on the temporary support 1 for the overlap of the final standard section steel box girder 3 and the closure section steel box girder 4. The temporary support 1 and the two sets of limiting rods 18 form a limiting groove for guiding the final standard section steel box girder 3. The outer periphery of the limiting rods 18 is coated with graphene to reduce the friction between the limiting rods 18 and the final standard section steel box girder 3.

[0055] Reference Figure 3 and Figure 4 The construction platform 14 of the temporary support 1 for the overlap of the final standard section steel box girder 3 and the closure section steel box girder 4 has two sets of limit rods 18 vertically fixed upwards and two sets of plug sleeves 17. The limit rods 18 are inserted into the corresponding plug sleeves 17 to realize the detachable connection between the limit rods 18 and the temporary support 1.

[0056] S2: Installation of the final standard section steel box girder 3: The final standard section steel box girder 3 is hoisted and moved by a floating crane, so that both ends of the final standard section steel box girder 3 are respectively attached to the corresponding temporary supports 1; at the same time, the final standard section steel box girder 3 is checked to the designated position.

[0057] S3: Connect the lifting assembly to the last standard section steel box girder 3; the specific operation steps are as follows: fix the main connecting plate 51 at the top of the piston rod of the two sets of lifting jacks 5 on the construction platform 14 to the bottom of the last standard section steel box girder 3.

[0058] S4: Installation of the closure segment steel box girder 4: The closure segment steel box girder 4 is hoisted above the two sets of final standard segment steel box girders 3 using a floating crane, and the piston rod of the Z-axis hydraulic cylinder 61 of the three-way jack 6 is connected to the closure segment steel box girder 4. The specific steps are as follows:

[0059] S4.1: The closure section steel box girder 4 is hoisted above the two sets of final standard section steel box girders 3 using a floating crane.

[0060] S4.2: The three-way jack 6 drives the piston rod of the Z-axis hydraulic cylinder 61 to move upward until the auxiliary connecting plate 62 is higher than the surface of the last standard section steel box girder 3;

[0061] S4.3: Lower the closure section steel box girder 4 until the bottom of the closure section steel box girder 4 abuts against the secondary connecting plate 62.

[0062] S4.4: Fix the secondary connecting plate 62 to the bottom of the closure section steel box girder 4.

[0063] S4.5: Pull the limit rod 18 out of the insertion sleeve 17 to remove the limit rod 18 from the temporary bracket 1.

[0064] Reference Figure 3 and Figure 4 By setting two sets of limiting rods 18 on the construction platform 14, the two sets of limiting rods 18 and the temporary support 1 form a limiting groove for guiding the closure section steel box girder 4. When hoisting the closure section steel box girder 4, the closure section steel box girder 4 is placed into the two sets of limiting rods 18, so that the closure section steel box girder 4 is not prone to large-scale shaking during the lowering process of the floating crane, and it is easy for the closure section steel box girder 4 to move quickly above the two sets of three-way jacks 6. The graphene coating on the outer periphery of the limiting rods 18 makes the closure section steel box girder 4 slide more smoothly and stably in the temporary guide rail.

[0065] S5: Position adjustment of closure section steel box girder 4: In conjunction with the total station, adjust the closure section steel box girder 4 to the designated installation position using the three-way jack 6.

[0066] S6: Cutting the reserved amount at both ends of the closure section steel box girder 4: Based on the actual positions of the two sets of final standard steel box girder sections 3, cut off the reserved amount at both ends of the closure section steel box girder 4. The specific operation steps are as follows:

[0067] S6.1: Install an infrared positioning device at the end of the last standard section of the steel box girder.

[0068] S6.2: Use an infrared positioning device to project a cutting reference line at the bottom of the closure section of the steel box girder 4.

[0069] S6.2: Using the cutting reference line projected by the infrared positioning instrument as a reference, cut off the excess allowance at the four ends of the closure section of the steel box girder.

[0070] By installing an infrared positioning device at the end of the final standard section steel box girder 3, the infrared light projected by the positioning device can be used as a reference during actual cutting, making it easier for construction personnel to more accurately cut the reserved amount at both ends of the closure section steel box girder 4. By connecting the auxiliary connecting plate 62 on the piston rod of the three-way jack 6Z-direction hydraulic cylinder 61 to the bottom of the closure section steel box girder 4, it is beneficial to reduce the displacement of the closure section steel box girder 4 during the process of cutting the reserved amount, making the cutting of the reserved amount of the closure section steel box girder 4 more accurate.

[0071] S7: The lifting assembly lifts one end of the corresponding final standard section steel box girder 3 that is close to the closing section steel box girder 4, so that the two sets of final standard section steel box girders 3 form an flared shape.

[0072] Reference Figure 2 and Figure 3 The specific steps for S7 are as follows: The piston rod of the lifting jack 5 is moved upwards until the end of the final standard section of the steel box girder 3 is lifted. It is important to note that when lifting the final standard section of the steel box girder 3 using the lifting jack 5, the final standard section of the steel box girder 3 should be slightly lifted. Only after confirming that there are no abnormalities can the lifting continue.

[0073] S8: Pre-positioning construction of the closure segment steel box girder 4: The closure segment steel box girder 4 is moved down and embedded between the two sets of final standard segment steel box girders 3 using three-way jacks 6; the specific steps are as follows.

[0074] Reference Figure 2 and Figure 4 The piston rod of the Z-axis hydraulic cylinder 61 is retracted by the three-axis jack 6. During the retraction of the piston rod of the Z-axis hydraulic cylinder 61, the closing section steel box girder 4 is moved down and embedded between the two sets of final standard section steel box girder 3.

[0075] S9: Positioning of the Closure Segment Steel Box Girder 4: Using three-way jacks 6 and lifting components, the closure segment steel box girder 4 and the final standard segment steel box girder 3 are moved down until they are fully positioned. Specific steps are as follows:

[0076] Reference Figure 2 and Figure 4 The piston rod of the Z-axis hydraulic cylinder 61 is further retracted by the three-axis jack 6 to drive the closure section steel box girder 4 to continue to move down. At the same time, the lifting jack 5 controls the piston rod to retract. During the retraction of the piston rod of the lifting jack 5, the last standard section steel box girder 3 is driven down together through the main connecting plate 51 until the closure section steel box girder 4 and the last standard section steel box girder 3 are completely in place.

[0077] S9: Weld and fix both ends of the final standard section steel box girder 3 to the already installed standard section steel box girder 2 and the closure section steel box girder 4 respectively.

[0078] It is important to note that during welding, the interpass temperature must be strictly controlled, and a spot thermometer should be used for monitoring throughout the welding process. After welding, slag and spatter must be cleaned, and welds requiring grinding according to the drawings must be ground smoothly. When welding butt welds, arc-starting and arc-extinguishing plates must be installed at both ends of the weld, and the material and bevel type of the arc-starting and arc-extinguishing plates must be consistent with the base material. If cracks are found in the weld during construction, the construction personnel should immediately notify the process engineers. After identifying the cause, the process engineers will develop a process plan, which can only be implemented after approval by the supervising engineer. Within 30mm of the weld area, there must be no water, rust, scale, oil, paint, or other debris.

[0079] This application utilizes two sets of lifting jacks 5 to drive the ends of the corresponding final standard section steel box girder 3 upwards, thereby forming an upward-facing flared opening to temporarily increase the installation space when the closure section steel box girder 4 is placed, making it easier for the subsequent closure section steel box girder 4 to be embedded between the two sets of final standard section steel box girder 3.

[0080] After the closure section steel box girder 4 is inserted between the two sets of final standard section steel box girder 3, the closure section steel box girder 4 and the final standard section steel box girder 3 are driven to move down together by the three-way jack 6 and the lifting jack 5 respectively. During the downward movement of the closure section steel box girder 4, both ends are always in contact with the corresponding final standard section steel box girder 3. This helps to reduce the possibility of excessive weld seams between the closure section steel box girder 4 and the final standard section steel box girder 3 after the closure section steel box girder 4 is installed in place. At the same time, the contact between the closure section steel box girder 4 and the final standard section steel box girder 3 helps to increase the friction between the final standard section steel box girder 3 and the closure section steel box girder 4. After the closure section steel box girder 4 and the final standard section steel box girder 3 are welded, the molecular arrangement between the final standard section steel box girder 3 and the closure section steel box girder 4 is more orderly and the intermolecular attraction is stronger, which further improves the welding quality of the final standard section steel box girder 3 and the closure section steel box girder 4.

[0081] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for constructing the closure section of an arched cantilever landscape bridge, characterized in that: Includes the following steps: S1: Install lifting components and three-way jacks (6) on the temporary support (1) where the end standard section steel box girder (3) and the closure section steel box girder (4) overlap; S2: Assembly and construction of the last standard section steel box girder (3): Move the last standard section steel box girder (3) so that both ends of the last standard section steel box girder (3) are respectively connected to the corresponding temporary supports (1); and check and adjust the last standard section steel box girder (3) to the designated installation position; S3: Connect the lifting assembly to the last standard section of the steel box girder (3); S4: Construction of the closure section steel box girder (4): hoist the closure section steel box girder (4) above the two sets of final standard section steel box girders (3) and connect the piston rod of the Z-direction cylinder (61) of the three-way jack (6) to the closure section steel box girder (4); S5: Position adjustment of the closure section steel box girder (4): Adjust the closure section steel box girder (4) to the designated installation position using a three-way jack (6); S6: Cutting the reserved amount of the closure section steel box girder (4): Cut off the reserved amount at both ends of the closure section steel box girder (4) according to the actual position of the two sets of standard section steel box girders (3); S7: The corresponding end standard section steel box girder (3) is lifted up near the end of the closing section steel box girder (4) by the lifting component, so that the two sets of end standard section steel box girders (3) form a flared shape; S8: Construction of pre-positioning of closure section steel box girder (4): The closure section steel box girder (4) is moved down and embedded between the two sets of final standard section steel box girders (3) by three-way jacks (6); S9: Construction of the closure section steel box girder (4): The closure section steel box girder (4) and the last standard section are moved down by the three-way jacks (6) and the lifting components respectively until they are completely in place; S10: Weld and fix the two ends of the last standard section steel box girder (3) to the installed standard section steel box girder (2) and the closure section steel box girder (4) respectively.

2. The construction method for the closure section of an arched cantilever landscape bridge according to claim 1, characterized in that: The lifting assembly includes a lifting jack (5), the bottom of which is ball-jointed on a temporary support (1), and the top of the piston rod of the lifting jack (5) is ball-jointed with a main connecting plate (51).

3. The construction method for the closure section of an arc-shaped cantilever landscape bridge according to claim 1, characterized in that: Two sets of limiting rods (18) are vertically installed on the temporary support (1) used for the end overlap of the closure section steel box girder (4). The temporary support (1) and the two sets of limiting rods (18) form a limiting groove for the closure section steel box girder (4) to be embedded.

4. The construction method for the closure section of an arc-shaped cantilever landscape bridge according to claim 3, characterized in that: The temporary support (1) used for the lap joint of the steel box girder (4) of the closure section has two sets of vertically arranged plug sleeves (17) corresponding to the two sets of limiting rods (18). The bottom ends of the two sets of limiting rods (18) are respectively inserted into the corresponding plug sleeves (17).

5. The construction method for the closure section of an arc-shaped cantilever landscape bridge according to claim 1, characterized in that: The specific steps of step S6 are as follows: S6.1: Install an infrared positioning device at the end of the last standard section of the steel box girder (3); S6.2: Use an infrared positioning device to project a cutting reference line on the bottom of the closure section steel box girder (4); S6.3: Based on the cutting reference line projected by the infrared positioning instrument, cut off the excess allowance at the end of the closure section steel box girder (4).

6. The construction method for the closure section of an arched cantilever landscape bridge according to claim 3, characterized in that: The temporary support (1) is also equipped with a construction platform (14) on top.

7. The construction method for the closure section of an arc-shaped cantilever landscape bridge according to claim 6, characterized in that: The limiting rod (18) is coated with a graphene coating on its outer periphery.

8. The construction method for the closure section of an arc-shaped cantilever landscape bridge according to claim 6, characterized in that: The construction platform (14) is surrounded by protective railings (15), and the temporary support (1) is also fixed with a ladder (16), which is located below the construction platform (14).

Images