Inland river steel truss girder arch bridge installation system

Abstract

The utility model discloses an inland river steel truss girder arch bridge installation system which comprises an assembling platform, the assembling platform is arranged on a river bank, rails are arranged on the two sides of the assembling platform, a gantry crane is arranged on the rails, and a main pier and an auxiliary pier are arranged on the two sides of the assembling platform respectively. The construction cost is reduced and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology. Specifically, this utility model relates to an installation system for an inland waterway steel truss arch bridge. Background Technology

[0002] Steel truss arch bridges are widely used in inland waterway bridge construction due to their aesthetic appeal and strong spanning capacity. However, the complex inland waterway environment, with its fluctuating water levels, narrow channels, and the influence of water flow, presents numerous challenges to bridge construction. Furthermore, with the development of inland waterway shipping, the requirements for navigation during construction are becoming increasingly stringent.

[0003] Traditional construction techniques for inland waterway steel truss arch bridges currently have limitations: 1. In-situ assembly using floating cranes or cranes: Assembly supports are set up in the middle of the river channel, and floating cranes or cranes are used to lift the main beam segments from both sides of the proposed bridge. This method requires navigation closure during construction, affecting inland waterway transport, and the assembly support setup is costly and difficult to dismantle. In narrow inland waterways, the floating crane's operating space is limited, resulting in low construction efficiency; 2. Pricing method: Pricing supports and operating platforms are erected, and jacks are used to push the main beam segments into place. This technique requires high main beam rigidity, and guide beams may be needed at the beam ends, increasing construction costs and difficulty. There is a high risk of overspan during priming, and deviations are difficult to correct, with a long construction period affecting normal waterway traffic; 3. Towing and sliding method: A sliding track 3 running through the entire bridge is set up, and the main beam segments are moved using a towing and sliding system. This requires long-term compression of the waterway during construction, affecting ship traffic, and the laying and maintenance of track 3 are costly. The beam segments are divided into many sections, making quality control difficult and the construction period long.

[0004] Utility model patent CN214089527U, published on August 31, 2021, discloses a hoisting system for arch bridges, used for installing arch ribs. The system includes several hoisting groups, with two groups symmetrically arranged on either side of a river, centered on the river. Each hoisting group includes: an anchorage fixed to the riverbank; a tower fixed to the riverbank and located inside the anchorage; a saddle positioned above the tower; and a cable system, one end connected to the anchorage and the other end passing around the saddle. The cable system includes a main cable, a working cable, and at least one pulley. Two hoisting groups are connected by the same main cable, and the working cable is connected to the main cable via pulleys, enabling the pulleys to rise, fall, and move laterally. However, this arch bridge hoisting system does not solve the aforementioned technical problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an inland waterway steel truss arch bridge installation system that reduces the impact on waterways, lowers construction costs, and improves construction efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The installation system for the inland waterway steel truss arch bridge includes an assembly platform located on the riverbank. The assembly platform has tracks on both sides, and a gantry crane is mounted on the tracks. Main piers and auxiliary piers are located on both sides of the assembly platform.

[0008] Temporary supports are set up in the river channel, and navigation holes are reserved between the temporary supports near the middle of the river channel.

[0009] The main pier is located on the side of the assembly platform closest to the river channel, and the auxiliary pier is located on the side of the assembly platform away from the river channel. The bottom of the main pier and the auxiliary pier are fixedly connected to a foundation.

[0010] The bottom of the assembly platform, the bottom of the pier cap, and the bottom of the temporary support are all fixedly connected to pile foundations.

[0011] A beam-carrying trolley is provided on one side of the assembly platform.

[0012] The gantry crane includes a support section, the bottom of which is provided with rollers that cooperate with a track; the support section has a trapezoidal structure and is provided with an upper reinforcing rod.

[0013] The bottom of the track is provided with steel pipe columns, which are evenly spaced.

[0014] This utility model has the following beneficial effects:

[0015] 1. The construction method of the bridge has been improved. The main construction structure is located on the riverbank, eliminating the need to set up large-scale operating equipment in the middle of the waterway. Navigation channels have also been reserved. The construction process can be completed by using gantry cranes and bridge deck cranes in combination. Compared with the traditional floating crane in-situ assembly and towing and sliding methods, this avoids affecting the navigation of the waterway, minimizes the occupation of the waterway, avoids navigation closures, and ensures smooth inland waterway transportation.

[0016] 2. Compared with the jacking method, which requires a large number of jacks, the construction of a complex platform, and the high cost of laying tracks in the dragging and sliding method, this utility model reduces the amount of temporary supports used and lowers construction costs.

[0017] 3. During the construction process, gantry cranes and bridge cranes can be used in combination. The hoisting equipment can be selected according to the segment division to reduce the number of beam transfers, speed up the construction progress, reduce construction costs, shorten the construction cycle, and significantly improve construction efficiency. At the same time, it reduces the amount of high-altitude work. The gantry crane hoisting equipment can accurately position and assemble the beams, improve the assembly and welding accuracy, and reduce safety risks. Attached Figure Description

[0018] This manual includes the following figures, which illustrate the following:

[0019] Figure 1This is a structural schematic diagram of the inland waterway steel truss arch bridge installation system of this utility model;

[0020] Figure 2 This is a side view of the installation system for the inland waterway steel truss arch bridge of this utility model;

[0021] Figure 3 This is a construction schematic diagram of the first segment of the bridge;

[0022] Figure 4 This is a construction schematic diagram of the remaining bridge segments.

[0023] The following are marked in the diagram: 1. Assembly platform 1; 2. Gantry crane 2; 3. Track 3; 4. Main pier 4; 5. Auxiliary pier 5; 6. Temporary support pier 6; 7. Pier 7; 8. Pile foundation 8; 9. Reserved navigation hole 9; 10. Beam transport trolley 10; 11. Support section 11; 12. Roller 12; 13. Reinforcing rod 13; 14. Steel pipe column 14; 15. Riverbank; 16. River channel; 17. Main beam segment; 18. Bridge deck crane 18. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this invention, and to facilitate its implementation.

[0025] like Figures 1 to 4 As shown, the inland waterway steel truss arch bridge installation system includes an assembly platform 1, located on the riverbank. Tracks 3 are installed on both sides of the assembly platform 1, with a gantry crane 2 mounted on the tracks 3. Main piers 4 and auxiliary piers 5 are located on both sides of the assembly platform 1. The assembly platform 1 serves as a construction platform for workers to install the first segment of the steel truss arch bridge. The main piers 4 and auxiliary piers 5 provide support for the first segment. The bridge is constructed from both ends and then joined in the middle. The first segment is constructed on the riverbank. After completion, the first segment can also serve as a moving track for the bridge deck crane 18, thus completing the installation of the remaining segments. Therefore, large-scale construction equipment is not required on the waterway. The main construction structure is located on the riverbank or on the bridge, minimizing waterway obstruction, avoiding navigation closures, ensuring smooth inland waterway transport, and reducing the impact on waterway navigation and surrounding traffic. This solves the construction challenges of steel truss arch bridges in inland waterway environments, improves construction efficiency, reduces the use of temporary supports, lowers construction costs, and increases the stability of hoisting safety.

[0026] like Figures 1 to 4As shown, temporary piers 6 are installed in the river channel, and navigation channels 9 are reserved between the temporary piers 6 near the middle of the river channel. The temporary piers 6 are used to support the subsequent main beam structure. The temporary piers 6 are removed after the overall bridge construction is completed. There are multiple temporary piers 6. The two temporary piers 6 located in the center of the river channel are spaced apart. When the temporary piers 6 are present, they form a normal navigation channel for the river channel, with minimal impact on the navigation channel.

[0027] like Figure 3 and Figure 4 As shown, the main pier 4 is located on the side of the assembly platform 1 closest to the river channel, while the auxiliary pier 5 is located on the side of the assembly platform 1 furthest from the river channel. The main pier 4 and auxiliary pier 5 are fixedly connected to a pier cap 7 at their bottoms. As the bridge is installed step by step, its weight increases accordingly. Located closer to the river channel, the pier cap 7 has a larger area and reliable load-bearing capacity, capable of supporting the weight of the remaining segments installed by the crane on the main beam. The pier cap 7 serves to distribute the load.

[0028] like Figure 1 and Figure 2 As shown, pile foundations 8 are fixedly connected to the bottom of the assembly platform 1, the bottom of the pier cap 7, and the bottom of the temporary support 6. The pile foundations 8 can effectively reduce the settlement of the above-ground buildings and bear vertical and lateral loads. They can solve the problem of large settlement caused by the high compressibility of soft soil foundations on riverbanks, and at the same time play a role in reinforcing the foundation, improving the overall stability of the construction equipment on the riverbank foundation, and providing reliable foundation conditions for subsequent engineering construction.

[0029] like Figure 1 As shown, a beam transport trolley 10 is provided on one side of the assembly platform 1. The beam transport trolley 10 is used to transport the first beam segment. The remaining most segments are transported by transport ships to transport the main beam segments (left and right steel trusses, bridge deck, and upper horizontal bracing). The construction is carried out in the order of first erecting the left and right steel trusses, then installing the bridge deck, and finally erecting the upper horizontal bracing. This can reduce the impact on the surrounding traffic environment and reduce the number of beam transfers, significantly improving construction efficiency.

[0030] like Figure 1 and Figure 2 As shown, the gantry crane 2 includes a support section 11, with rollers 12 at the bottom end of the support section 11, which cooperate with the track 3. The support section 11 has a trapezoidal structure and is equipped with an upper reinforcing rod 13. The reinforcing rod 13 further improves the load-bearing capacity of the support section 11, maintains the stability of the gantry crane 2 during the hoisting process, and provides a convenient and precise foundation for the splicing, installation, and construction processes.

[0031] like Figure 1 and Figure 2As shown, steel pipe columns 14 are installed at the bottom of track 3, and the steel pipe columns 14 are evenly spaced. The steel pipe columns 14 extend into the riverbank foundation to ensure that the track 3 is installed horizontally and to ensure the stability of the gantry crane 2 during operation.

[0032] like Figure 3 and Figure 4 As shown, the overall construction process of the bridge using this device is as follows: Based on the bridge span, navigation requirements, underpass road traffic requirements, and corresponding geological conditions, temporary piers 6 are designed and erected, supports are assembled, gantry crane 2 rails 3 foundations and gantry crane 2 are installed. Temporary piers 6 are set up at the proposed bridge site, navigation holes are reserved in the river channel, gantry crane 2 rails 3 foundations are built on both sides of the bridge and gantry crane 2 is installed; steel beam segments on both banks are manufactured in the segment factory, and the segmented units are transported to the site by waterway. The beams are directly lifted and installed from the river channel by 120t gantry crane 2, and pre-lifting and pre-lowering measures are taken according to monitoring requirements; bridge deck crane 18 is assembled near the arch corner, the crane is moved forward, and the remaining segments are lifted to achieve the closure of the steel truss beam; the remaining work such as arch rib installation and suspender installation is carried out by floating crane, and the construction of the entire bridge is completed.

[0033] Example: This device was used in the main beam erection of the Grand Canal Bridge on the Jiangsu section of the Weifang-Suqian High-speed Railway constructed by the applicant. The beam-first and arch-later erection is more convenient, the safety risks of high-altitude operations are significantly reduced, the material input for main beam assembly support is reduced by about 2,600 tons, the impact on the underpass waterway is reduced, the waterway is avoided from being closed to navigation, and the construction efficiency is improved.

[0034] The installation system for the inland waterway steel truss arch bridge has the following beneficial effects:

[0035] 1. The construction method of the bridge has been improved. The main construction structure is located on the riverbank, eliminating the need to set up large-scale operating equipment in the middle of the waterway. Navigation channels have also been reserved. The construction process can be completed by using gantry crane 2 and bridge deck crane 18 in coordination. Compared with the traditional floating crane in-situ assembly and towing and sliding method, this avoids affecting the navigation of the waterway, minimizes the occupation of the waterway, avoids navigation closure, and ensures smooth inland waterway transportation.

[0036] 2. Compared with the jacking method, which requires a large number of jacks, the construction of a complex platform, and the high cost of laying the track 3 in the dragging and sliding method, this utility model reduces the amount of temporary supports used and lowers the construction cost.

[0037] 3. During the construction process, gantry crane 2 and bridge deck crane 18 can be used in coordination. The hoisting equipment can be selected according to the segment division to reduce the number of beam transfers, speed up the construction progress, reduce the construction cycle, and significantly improve the construction efficiency. At the same time, it reduces the amount of high-altitude work. The gantry crane hoisting equipment can accurately position and assemble the beams, improve the assembly and welding accuracy, and reduce safety risks.

[0038] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An installation system for an inland waterway steel truss arch bridge, characterized in that: It includes an assembly platform (1), which is located on the riverbank. The assembly platform (1) has tracks (3) on both sides, and a gantry crane (2) is installed on the tracks (3). The assembly platform (1) has a main pier (4) and an auxiliary pier (5) on both sides respectively.

2. The inland waterway steel truss arch bridge installation system according to claim 1, characterized in that: Temporary support piers (6) are provided in the river channel, and navigation holes (9) are reserved between the temporary support piers (6) near the middle of the river channel.

3. The inland waterway steel truss arch bridge installation system according to claim 2, characterized in that: The main pier (4) is located on the side of the river channel close to the assembly platform (1), and the auxiliary pier (5) is located on the side of the assembly platform (1) away from the river channel. The main pier (4) and the auxiliary pier (5) are fixedly connected to the bottom of the pier (7).

4. The inland waterway steel truss arch bridge installation system according to claim 3, characterized in that: The bottom of the assembly platform (1), the bottom of the pier (7), and the bottom of the temporary support (6) are all fixedly connected to pile foundations (8).

5. The inland waterway steel truss arch bridge installation system according to any one of claims 1-4, characterized in that: The assembly platform (1) is equipped with a beam transport trolley (10) on one side.

6. The inland waterway steel truss arch bridge installation system according to claim 5, characterized in that: The gantry crane (2) includes a support part (11), and the bottom end of the support part (11) is provided with a roller (12), which cooperates with the track (3); the support part (11) has a trapezoidal structure, and the support part (11) is provided with an upper reinforcing rod (13).

7. The inland waterway steel truss arch bridge installation system according to claim 6, characterized in that: The bottom of the track (3) is provided with steel pipe columns (14), which are evenly spaced.

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