Installation system for steel truss girder bridge

Abstract

The present invention relates to an installation system for a steel truss beam bridge, including a temporary pier mechanism for placing a small steel beam segment, pushing the small steel beam segment to a preset position on the top of the main pier, so that two small steel beam segments are combined to obtain a large steel beam segment; a flat rotating turntable mechanism, including a flat rotating turntable arranged on the top of the main pier and used to flatly rotate the large steel beam segment to the preset position; a locking pier structure, wherein the locking pier structure is provided with a locking structure for locking the side span end of the large steel beam segment at the preset position. The present application realizes the prefabrication of the large steel beam segment in the factory, ensures the construction quality of the large steel beam segment, reduces the influence of the on-site construction process on the stress of the main beam structure, and realizes the overall installation of the large steel beam segment. At the same time, by setting up a temporary pier mechanism and a locking pier structure, the occupation of the road and waterway under the bridge is avoided, and during the bridge construction process, the passage of the road and waterway under the bridge will not be hindered.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to an installation system for a steel truss beam bridge. Background Art

[0002] Steel truss beam bridge is a beam bridge that uses steel truss as the main load-bearing structure. It is generally composed of two main trusses and a longitudinal connection system and a transverse connection system to form a spatial structure. In the prior art, the conventional construction process of the main beam of a large-span steel truss beam bridge is usually constructed by segment cantilever assembly or jacking method. When the segment cantilever is constructed by assembly, the construction period is relatively long, and there are many on-site construction assembly processes, which affects the construction accuracy and connection quality of the bridge. For beam bridges with larger spans, the jacking construction method is used for the construction of the bridge. Auxiliary piers need to be set up section by section, which affects the navigation or traffic within the span range, has a greater restriction on the construction space, and increases the construction workload. At the same time, the jacking construction has a certain impact on the line shape of the bridge and the stress of the beam body during the construction stage, which is not conducive to the stress of the bridge structure. Summary of the invention

[0003] In order to overcome the above technical problems, especially the long construction period and many processes of steel truss beam bridge on site, the inability to ensure the bridge construction accuracy and connection quality, as well as the large construction space constraints and heavy construction workload, the following technical solutions are proposed:

[0004] An installation system for a steel truss beam bridge provided in an embodiment of the present application includes:

[0005] A temporary pier mechanism is used to place a small steel beam segment, and push the small steel beam segment to a preset position on the top of the main pier, so that the two small steel beam segments are combined to obtain a large steel beam segment;

[0006] A pan-rotating turntable mechanism, comprising a pan-rotating turntable arranged on the top of the main pier and used for pan-rotating the large steel beam section to a preset position;

[0007] A locking pier structure is provided on which a locking structure for locking the side span end of the large section of the steel beam at the preset position is arranged.

[0008] Optionally, the temporary buttress mechanism includes a temporary buttress and a displacement device arranged on the temporary buttress.

[0009] Optionally, the displacement device includes a lifting device and a pushing device.

[0010] Optionally, the temporary pier is a steel platform structure, which includes steel pipe piles and a steel platform arranged on the steel pipe piles, and load-bearing beams and auxiliary beams are arranged between the steel pipe piles and under the steel platform.

[0011] Optionally, the load-bearing beam and the auxiliary beam are made of section steel.

[0012] Optionally, the pan-rotating turntable mechanism further includes a pan-rotating auxiliary pier structure, and the pan-rotating auxiliary pier structure is located at the bottom of the maximum cantilever end beam of the pan-rotating turntable.

[0013] Optionally, the translation auxiliary pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the steel pipe pile foundation, and a parallel connection arranged between two opposite columns.

[0014] Optionally, the locking structure is an anchoring structure that provides vertical locking force to the side span end of the large section of the steel beam.

[0015] Optionally, the locking pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the steel pipe pile foundation, and a parallel connection arranged between two opposite columns, and a load-bearing beam is also arranged between the columns.

[0016] Optionally, it also includes a transportation channel arranged on the large steel beam section for transporting the steel beam sub-sections.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The installation system of the steel truss beam bridge provided in the embodiment of the present application includes a temporary pier mechanism for placing a small steel beam segment, pushing the small steel beam segment to a preset position on the top of the main pier, so that the two small steel beam segments are combined to obtain a large steel beam segment; a flat turntable mechanism, including a flat turntable provided on the top of the main pier for flatly rotating the large steel beam segment to the preset position; and a locking pier structure, on which a locking structure for locking the side span end of the large steel beam segment at the preset position is provided. The present application realizes the prefabrication of the large steel beam segment in the factory, ensures the construction quality of the large steel beam segment, reduces the influence of the on-site construction process on the stress of the main beam structure, and also improves the current construction efficiency of the construction. At the construction site, it is only necessary to lift the steel beam segment from a low position to an elevated position, and push and translate it, and then translate the large steel beam segment to the designed position through the flat turntable, thereby realizing the overall installation of the large steel beam segment. At the same time, by setting up temporary pier mechanisms and locking pier structures, occupation of roads and waterways under the bridge is avoided, and the passage of roads and waterways under the bridge will not be hindered during the bridge construction process.

[0019] The installation system of the steel truss beam bridge provided in the embodiment of the present application is provided with a plurality of temporary pier mechanisms including temporary piers and displacement devices provided on the temporary piers, which are respectively provided on both sides along the bridge. The displacement device includes a jacking device and a pushing device. The temporary pier is a steel platform structure, and the steel platform structure includes steel pipe piles and a steel platform provided on the steel pipe piles. A load-bearing beam and an auxiliary beam are provided between the steel pipe piles and under the steel platform, so that when a small section of the steel beam is pushed, multi-point continuous pushing can be achieved, so that the small section of the steel beam can be smoothly, quickly and accurately pushed to the preset position on the top of the main pier.

[0020] The installation system of the steel truss beam bridge provided in the embodiment of the present application, the said translation turntable mechanism also includes a translation auxiliary pier structure, and the said translation auxiliary pier structure is located at the bottom of the maximum cantilever end beam of the said translation turntable. The said translation auxiliary pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the said steel pipe pile foundation, and a parallel connection arranged between two opposite columns. When the large section of the steel beam is translated, the large section of the steel beam is translated to the preset position in multiple steps by setting the safe translation auxiliary pier structure for the large section of the steel beam, so that the large section of the steel beam can be translated to the preset position accurately, which improves the translation accuracy of the large section of the steel beam and ensures the safety of the large section of the steel beam during the translation.

[0021] In the installation system of the steel truss beam bridge provided in the embodiment of the present application, the locking structure is an anchoring structure that provides vertical locking force to the side span end of the large steel beam segment, ensuring that the large steel beam segment that has been rotated horizontally into place can be located at the designed position before the entire bridge is closed, and at the same time avoiding the collapse of the large steel beam segment when the force is uneven.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of the present invention in which a small section of a steel beam is placed on a temporary buttress structure and is pushed to the top of the main pier by a displacement device on the temporary buttress structure;

[0025] Figure 2 It is a structural schematic diagram of the temporary buttress, the flat rotating turntable and the locking buttress structure of the present invention, mainly showing the relative positions of the temporary buttress, the flat rotating turntable and the locking buttress structure;

[0026] Figure 3It is a structural schematic diagram of a temporary pier structure of the present invention in which a jacking device and a jacking device are placed;

[0027] Figure 4 It is a structural schematic diagram of the main viewing direction of the flat rotating turntable of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the flat rotating turntable structure of the present invention when viewed from above;

[0029] Figure 6 It is a structural schematic diagram of the process of the horizontal rotation turntable of the present invention horizontally rotating a large section of a steel beam, and a structural schematic diagram showing the position of the auxiliary pier;

[0030] Figure 7 It is a structural schematic diagram of the mid-span closure of the steel truss beam bridge of the present invention. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0032] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of features, integers, steps, operations, but does not exclude the presence or addition of one or more other features, integers, steps, operations.

[0033] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0034] The embodiment of the present application provides a steel truss beam bridge installation system, in order to ensure the smooth installation of the bridge, and the smooth, rapid and accurate transportation of the steel beams during the installation process at each stage, such as Figure 1As shown, the present application builds a horizontal rotating turntable 8 on the top of the main pier 1, and builds multiple temporary piers 5 on both sides of the horizontal rotating turntable 8 along the bridge. The temporary piers 5 are used to temporarily place the steel beam small segment 3, and a displacement device for pushing and adjusting the position of the steel beam small segment is set on the temporary pier 5. The displacement device includes a jacking device 6 and a pushing device 7 placed on the top of the jacking device 6. Figure 1 As shown, before the two steel beam segments 3 are closed on the top of the main pier 1, the two steel beam segments 3 are placed on temporary piers 5 on both sides along the bridge, so as to facilitate smooth pushing of the steel beam segments 3 on the temporary piers 5.

[0035] The embodiment of the present application provides an installation system for a steel truss beam bridge, comprising: a temporary supporting pier mechanism, a flat rotating disk mechanism, and a locking pier structure, such as Figure 2 As shown, FIG. 2 shows the relative positions of the temporary buttress 5 in the temporary buttress mechanism, the pan-rotating turntable 8 in the pan-rotating turntable mechanism and the locking pier structure 10.

[0036] The temporary pier mechanism is used to place small steel beam segments, and push the small steel beam segments to the preset position on the top of the main pier, so that the two small steel beam segments are combined to obtain a large steel beam segment.

[0037] In the embodiment provided in the present application, since the position of the bridge is fixed, the position of each steel beam segment is also fixed. For the convenience of installation, a temporary pier structure is constructed by using appropriate hoisting and mechanical equipment at a preset position. At the same time, the temporary pier structure meets the requirements of bearing capacity and stability, so that the position of the temporary pier structure can ensure that the small steel beam segment can be smoothly moved into place. Before placing the small steel beam segment on the temporary pier structure, a displacement device for adjusting the position of the small steel beam segment needs to be set on the temporary pier structure, so that the small steel beam segment can be lifted and pushed by the displacement device.

[0038] Alternatively, if Figure 3 As shown, the temporary buttress 5 is a steel platform structure, which includes steel pipe piles 51 and a steel platform 52 arranged on the steel pipe piles. A load-bearing beam and an auxiliary beam are arranged between the steel pipe piles 51 and under the steel platform 52. Optionally, the load-bearing beam and the auxiliary beam are made of steel sections, which ensure the rigidity and stability of the temporary buttress 5, while reducing the weight of the temporary buttress 5, making it easier to build the temporary buttress 5. The temporary buttress 5 adopts a steel platform structure, which has good flatness and can better place the displacement device to ensure the accuracy and stability of the displacement device. A steel platform flat connection structure 53 is arranged between the steel pipe piles 51 to further ensure the stability and safety between the steel pipe piles 51; the steel pipe piles 51 are also provided with steel pipe pile column foundations to further ensure the stability of the temporary buttress 5.

[0039] Continue to refer Figure 3, the displacement device includes a jacking device and a pushing device. Before the jacking device lifts the steel beam sub-segment, the jacking device is placed in the starting position. A base 62 is arranged between the jacking device and the steel platform, so that the jacking device has good stability and support. When the jacking device is installed on the temporary pier 5, the corresponding column of the steel pipe pile 5 is the main column, so it is necessary to ensure the strength and rigidity of the column. Before the jacking device lifts the steel beam sub-segment 3, the flatness of the jacking device must be ensured, and at the same time, the jacking equipment of all the fulcrums of each beam body 61 is adjusted to the corresponding beam body 61 elevation, wherein the beam body 61 is a standard beam for jacking. The pushing device is arranged at the top of the jacking device, and the pushing device includes a walking pushing device 71, a steel beam pad 72, a transverse jack 73, and a longitudinal jack 74, which is convenient for providing a stable adjustment of three-way displacement to the pushed steel beam sub-segment, and ensuring the accuracy of the translation of the steel beam sub-segment.

[0040] After the temporary pier structure is built, the small steel beam segment is transported to the preset position in the area where the temporary pier structure is located. The preset position is an area that is convenient for fulcrum conversion. The fulcrum of the small steel beam segment is converted to the temporary pier structure at the preset position, so that the small steel beam segment is placed on the temporary pier structure. Among them, the small steel beam segment uses barges or beam transport flat cars and other equipment to transport the closed section of the steel truss beam to the bridge position, and at the same time drives into the area of ​​the temporary pier structure. Through the jacking device placed in advance on the temporary pier structure, the support point of the small steel beam segment is converted to the temporary pier, and the transportation equipment drives out at the same time, so that the beam segment is placed on the jacking equipment as a whole and stably.

[0041] The horizontal rotating turntable mechanism comprises a horizontal rotating turntable which is arranged on the top of the main pier and is used for horizontally rotating a large section of a steel beam to a preset position.

[0042] After the small steel beam segment is moved to the preset position on the top of the main pier through the temporary support pier mechanism and welded to obtain the large steel beam segment, in order to adjust the position of the large steel beam segment to the preset position, it is necessary to adjust the position of the large steel beam segment through the flat turntable mechanism. Accordingly, the flat turntable mechanism needs to be built. Figure 4 and Figure 5 As shown, the construction of the main pier 1 and its cap is completed. According to the conditions of the construction site, a suitable hoisting equipment is used to install a flat turntable on the main pier 1. The flat turntable includes a turntable, a support leg 84, etc. Figure 4 The shadow of the middle support leg 84 is used to show the position where the support leg 84 is installed below the horizontal slideway steel box 82. A column steel pipe 81 is arranged between the horizontal turntable and the main pier 1 to realize the support of the horizontal turntable by the main pier 1. The turntable is provided with a horizontal central rotation axis 83, a horizontal slideway steel box 82, and a traction jack 85 for traction of the large section of the steel beam. When installing the horizontal turntable, it is necessary to ensure accurate positioning, especially the turntable system and the slideway, to ensure the horizontal rotation accuracy of the large section of the steel beam.

[0043] In order to realize the smooth horizontal rotation of the small section of the steel beam, the horizontal rotation turntable mechanism also includes a horizontal rotation auxiliary pier structure, so that the large section of the steel beam can be gradually horizontally rotated to ensure the stability and safety during the horizontal rotation process. Figure 6 As shown, the horizontal rotation auxiliary pier structure 9 is located at the bottom of the maximum cantilever end beam of the horizontal rotation turntable 8, that is, below the cantilever end of the large steel beam segment formed by the small steel beam segment 3. The horizontal rotation auxiliary pier structure 9 is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the steel pipe pile foundation, and a flat connection set between two opposite columns, to ensure the stability and safety of the large steel beam segment horizontally rotated to the horizontal rotation auxiliary pier structure 9, so as to facilitate the adjustment of the horizontal rotation process, and place the large steel beam segment on the horizontal rotation auxiliary pier structure 9 to ensure the horizontal rotation accuracy and horizontal rotation position of the large steel beam segment. Therefore, before the horizontal rotation, the horizontal rotation auxiliary pier structure is built on the horizontal rotation curve of the side span end of the large steel beam segment. During the horizontal rotation process, the horizontal rotation turntable first horizontally rotates the side span end of the large steel beam segment from the temporary pier structure to the horizontal rotation auxiliary pier structure, and then horizontally rotates from the horizontal rotation auxiliary pier structure to the preset position, ensuring the stability and safety during the horizontal rotation process.

[0044] A locking pier structure is provided on the locking pier structure, which is used to lock the side span end of the large section of the steel beam at a preset position.

[0045] Optionally, the locking structure is an anchoring structure that provides vertical locking force to the side span end of the large steel beam segment. Optionally, the locking pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the steel pipe pile foundation, and a flat joint arranged between two opposite columns, and a load-bearing beam is also arranged between the columns, which ensures that the locking pier can not only lock the large steel beam segment, but also withstand the gravity of the large steel beam segment transmitting the locking pier structure, and the flat joint can ensure stability during the locking process.

[0046] After completing the horizontal rotation welding of the large steel beam section, in order to avoid the displacement of the side span end of the large steel beam section during the construction process, ensure that the large steel beam section is in the designed position. At the preset position (design position) of the large steel beam section, a locking pier structure is built so that the side span end of the large steel beam section that has been horizontally rotated into place can be temporarily locked on the locking pier to achieve the locking of the main beam unit of the bridge. Optionally, the locking structure set on the locking pier is an anchoring device, and the side span end of the large steel beam section is anchored by the anchoring device to fix the side span end at the preset position to prevent the side span end from shifting. The vertical locking force provided by the anchoring structure ensures that the large steel beam section that has been horizontally rotated into place can be located in the designed position before the entire bridge is closed, and at the same time prevents the large steel beam section from collapsing when the force is uneven.

[0047] Optionally, it also includes a transport channel arranged on the large steel beam segment for transporting steel beam sub-segments.

[0048] After the installation and locking of the large steel beam section is completed, in order to facilitate the installation of other steel beam sub-segments, a temporary transportation channel is built on the large steel beam section, the steel beam sub-segment is transported to the installation position through the temporary transportation channel, and the steel beam sub-segment is connected to the side span end of the large steel beam section to achieve the closing of the middle span of the bridge with other sections, and the construction of the entire bridge, wherein the side span end of the large steel beam section is locked on the locking pier.

[0049] In one embodiment, Figure 7 As shown, after the current section of the steel beam large section is completed, in order to realize the closing of the middle span of the bridge, a transportation channel is built on the locked steel beam large section, and the steel beam small section 3 in the steel beam large section of the next section is transported through the transportation channel, and the steel beam small section is transported to the temporary pier structure of the steel beam large section of the next section, and the steel beam large section of the next section is installed on the top of the main pier 1, that is, the steel beam small section is transported and placed on the temporary pier, and the steel beam small section is pushed to the designed position by the top pushing and lifting device on the temporary pier, and the steel beam large section of the next section is welded and locked. Then the closing ends 31 of the two steel beam large sections are closed and welded to realize the closing of the middle span, and the middle span is placed on the pier body 2 of the main pier 1. At the same time, other steel beam sub-segments can be transported through the transportation channel to connect with the side span ends of the steel beam large section to realize the construction of the entire bridge.

[0050] The steel truss girder bridge provided in the embodiment of the present application realizes the prefabrication of two steel beam sections, namely the steel beam sub-section and the steel beam large section, in the factory at the beginning of installation, avoiding the production of steel beam small sections at the construction site. After the bridge is completed, the linear error of the bridge main beam preset is small and meets the preset error threshold. At the same time, the stress points of the bridge's stress-bearing structure are all within the preset position range, ensuring that the bridge can be properly stressed, thereby ensuring the accuracy and good stress condition of the entire structure of the steel beam large section. Due to the factory prefabrication method, the construction period of the steel truss girder bridge is shortened, and the construction efficiency and quality of the steel truss girder bridge are improved.

[0051] When the installation system of the steel truss beam bridge provided by the present application is used for installation, after the temporary pier structure is built and the small steel beam segment is placed on the temporary pier structure, the small steel beam segment is pushed and lifted. The small steel beam segment is lifted vertically to the elevation position by the lifting device on the temporary pier structure, and then the small steel beam segment is pushed horizontally to the preset position on the top of the main pier by the lifting device. In the embodiment provided by the present application, at least two temporary pier structures are provided on one side, and each temporary pier structure is provided with a displacement device. Among them, the pushing device is placed at the top of the lifting tower in the lifting device, and according to the force on the fulcrum, at least one set of pushing devices is also provided on one pushing device, so as to facilitate the continuous pushing of the small steel beam segment to the preset position on the top of the main pier at multiple points.

[0052] Each temporary pier structure is equipped with a set of jacking devices, which are composed of synchronous jacking equipment and a stabilization system. The jacking system adopts the ALE MJS5200 intelligent synchronous jacking device; the main components of the jacking device include beam feeding slides, jacking bases, standard beams, temporary supports, starting beams, load-bearing platforms, etc. The main components of the stabilization system include truss parallel joints, stabilizing cables, vertical stabilizing cables, etc. The truss parallel joints are made of steel pipes to form truss beams, and the strength and rigidity meet the structural design requirements. The jacking device includes slides, vertical hydraulic jacks, transverse hydraulic jacks, and longitudinal hydraulic jacks, which provide three-way adjustment to ensure the translation accuracy of the beam section. Temporary piers are set on both sides of the jacking device, and steel pads and elastic rubber pads are arranged above the vertical jacks.

[0053] Optionally, the embodiments provided in the present application include a synchronous jacking system and a synchronous pushing system, so that the jacking devices on multiple temporary pier structures on one side operate synchronously, and the pushing devices on multiple temporary pier structures on one side also operate synchronously. The synchronous jacking system is used to jack the beam section. During jacking, the jacking hydraulic jack is lifted, and the bottom of the frame is lifted to the top surface of the temporary support. The temporary support is rotated 90°, and the sectioning mouth is directly opposite the transverse sectioning slideway; the jacking hydraulic jack descends below the sectioning slideway, and the frame is supported on the movable legs; the transverse jacking standard beam slides in through the sectioning slideway and is connected to the upper frame to complete a round of jacking. After jacking synchronously section by section to the corresponding elevation, the stabilizing cable and truss parallel connection are set in time, and the small section of the steel beam is lifted until it exceeds the design elevation by about 20 cm, and the jacking equipment is temporarily locked.

[0054] After the jacking is completed, the jacking system enables the jacking device to jack the small steel beam segment, push the beam segment to the vicinity of the main pier top, complete the alignment welding of the two steel beam small segments on the main pier top, and form a steel beam rotation segment; start the synchronous jacking system, push the single steel beam small segment to the preset position on the main pier top through the jacking device, and temporarily lock it after precise jacking alignment. At the same time, the steel beam small segment of the corresponding segment is completed by jacking, and the welding platform and protective shed are installed at the joint between the steel beam small segments. The beam segment butt welds are welded and tested. After the test is completed, the large steel beam segment is obtained.

[0055] After the large steel beam section is completed, it is necessary to rotate the large steel beam section to the preset position. Optionally, before the rotation, the rotation support feet, upper turntable, shaft, etc. are installed on the turntable to realize the rotation of the large steel beam section, and the beam body is dropped onto the rotation support feet through the jacking device. The beam section is rotated horizontally by the horizontal rotation method of the center shaft-support foot ring, and the traction equipment, various sensors, etc. are installed, and the debugging of the turntable is completed; in addition, a limit device is placed at the position where the large steel beam section is placed on the turntable, and a rubber pad is placed in front of the limit device as a buffer device; the large steel beam section is tested to detect whether the rotation systems are normal; the continuous traction jack is started to pull the large steel beam section for rotation; after the rotation is accurate, the large steel beam section is temporarily placed on the turntable, and the locking structure on the pier structure is locked.

[0056] After completing the anchoring and locking of the large steel beam segment, in order to facilitate the installation of other steel beam sub-segments, a temporary transportation channel is built on the large steel beam segment. The steel beam sub-segment is transported to the installation position through the temporary transportation channel, and the steel beam sub-segment is connected to the side span end of the large steel beam segment to achieve the closing of the middle span of the bridge with other segments, as well as the construction of the entire bridge. The side span end of the large steel beam segment is locked on the locking pier. The specific functions of the transportation channel are detailed in the previous article and will not be repeated here.

[0057] In summary, the steel hanging box provided by this application has the following beneficial effects:

[0058] The installation system of the steel truss beam bridge provided in the embodiment of the present application includes a temporary pier mechanism for placing a small steel beam segment, pushing the small steel beam segment to a preset position on the top of the main pier, so that the two small steel beam segments are combined to obtain a large steel beam segment; a flat turntable mechanism, including a flat turntable provided on the top of the main pier for flatly rotating the large steel beam segment to the preset position; and a locking pier structure, on which a locking structure for locking the side span end of the large steel beam segment at the preset position is provided. The present application realizes the prefabrication of the large steel beam segment in the factory, ensures the construction quality of the large steel beam segment, reduces the influence of the on-site construction process on the stress of the main beam structure, and also improves the current construction efficiency of the construction. At the construction site, it is only necessary to lift the steel beam segment from a low position to an elevated position, and push and translate it, and then translate the large steel beam segment to the designed position through the flat turntable, thereby realizing the overall installation of the large steel beam segment. At the same time, by setting up temporary pier mechanisms and locking pier structures, occupation of roads and waterways under the bridge is avoided, and the passage of roads and waterways under the bridge will not be hindered during the bridge construction process.

[0059] The installation system of the steel truss beam bridge provided in the embodiment of the present application is provided with a plurality of temporary pier mechanisms including temporary piers and displacement devices provided on the temporary piers, which are respectively provided on both sides along the bridge. The displacement device includes a jacking device and a pushing device. The temporary pier is a steel platform structure, and the steel platform structure includes steel pipe piles and a steel platform provided on the steel pipe piles. A load-bearing beam and an auxiliary beam are provided between the steel pipe piles and under the steel platform, so that when a small section of the steel beam is pushed, multi-point continuous pushing can be achieved, so that the small section of the steel beam can be smoothly, quickly and accurately pushed to the preset position on the top of the main pier.

[0060] The installation system of the steel truss beam bridge provided in the embodiment of the present application, the said translation turntable mechanism also includes a translation auxiliary pier structure, and the said translation auxiliary pier structure is located at the bottom of the maximum cantilever end beam of the said translation turntable. The said translation auxiliary pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the said steel pipe pile foundation, and a parallel connection arranged between two opposite columns. When the large section of the steel beam is translated, the large section of the steel beam is translated to the preset position in multiple steps by setting the safe translation auxiliary pier structure for the large section of the steel beam, which facilitates the accurate translation of the large section of the steel beam to the preset position, and improves the accuracy of the translation of the large section of the steel beam.

[0061] The installation system of the steel truss beam bridge provided in the embodiment of the present application, the locking structure is an anchoring structure that provides vertical locking force to the side span end of the large steel beam section, ensuring that the large steel beam section that has been rotated into place can be located in the designed position before the entire bridge is closed, and at the same time avoiding the collapse of the large steel beam section when the force is uneven.

[0062] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A steel truss beam bridge installation system, characterized in that: include: A temporary pier mechanism is used to place a small steel beam segment, and push the small steel beam segment to a preset position on the top of the main pier, so that the two small steel beam segments are combined to obtain a large steel beam segment; A pan-rotating turntable mechanism, comprising a pan-rotating turntable arranged on the top of the main pier and used for pan-rotating the large steel beam section to a preset position; A locking pier structure, on which a locking structure for locking the side span end of the large section of the steel beam translated to the preset position is provided; the locking structure is an anchoring structure that provides a vertical locking force to the side span end of the large section of the steel beam; It also includes a transportation channel arranged on the large steel beam section for transporting steel beam sub-sections.

2. The installation system for a steel truss beam bridge according to claim 1, characterized in that: The temporary buttress mechanism comprises a temporary buttress and a displacement device arranged on the temporary buttress.

3. The installation system for a steel truss bridge according to claim 2, characterized in that: The displacement device comprises a lifting device and a pushing device.

4. The installation system for a steel truss beam bridge according to claim 2, characterized in that: The temporary pier is a steel platform structure, which includes steel pipe piles and a steel platform arranged on the steel pipe piles. Load-bearing beams and auxiliary beams are arranged between the steel pipe piles and under the steel platform.

5. The installation system for a steel truss bridge according to claim 4, characterized in that: The load-bearing beam and the auxiliary beam are made of section steel.

6. The installation system for a steel truss bridge according to claim 1, characterized in that: The pan-rotating turntable mechanism also includes a pan-rotating auxiliary pier structure, which is located at the bottom of the maximum cantilever end beam of the pan-rotating turntable. The bottom of the maximum cantilever end beam is below the cantilever end of the large steel beam segment formed by the small steel beam segments.

7. The installation system for a steel truss bridge according to claim 6, characterized in that: The horizontal rotation auxiliary pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the steel pipe pile foundation, and a horizontal connection arranged between two opposite columns.

8. The installation system for a steel truss bridge according to claim 1, characterized in that: The locking pier structure is a steel pipe pile support structure, including a steel pipe pile foundation, a column connected to the steel pipe pile foundation, and a flat joint arranged between two opposite columns, and a load-bearing beam is also arranged between the columns.

Images