Open-type bearing frame, support and construction method for super-long-span bridge

Abstract

The application provides an open type bearing frame, a support and a construction method for a super-long-span bridge, and solves the problems that the bridge support in the prior art cannot simultaneously meet the vertical support and horizontal support required by the large span, has poor stability, and cannot simultaneously consider the assembly efficiency and construction difficulty; the open type bearing frame for the super-long-span bridge comprises a vertical support structure, the vertical support structure comprises two first embedded parts and a second embedded part which are respectively embedded in two side pier caps, two vertical rods which are respectively fixedly connected with the first embedded parts at bottom ends, two groups of horizontal diagonal bracing supports and a middle cross bar; the horizontal diagonal bracing support is a V-shaped frame formed by a side cross bar and one end of a diagonal rod, and upper and lower four-way pipes are arranged in the middle of the diagonal rod; the two ends of the middle cross bar are respectively connected with the two side horizontal diagonal bracing supports, and the middle cross bar is flush with the side cross bars on the two sides; and a horizontal load sharing structure, the horizontal load sharing structure comprises a truss and two groups of upper and lower connecting pipes.

Description

Technical Field

[0001] This invention relates to the field of temporary support technology for bridge engineering, and in particular to an open-type load-bearing frame, support, and construction method for ultra-long span bridges. Background Technology

[0002] In the field of bridge engineering, ultra-long-span bridges have become a core choice for transportation infrastructure construction due to their ability to overcome complex geographical obstacles. During the construction phase of such bridges, the bridge structure (especially cantilevered or cast-in-place beams) relies on temporary supports to bear multiple forces, including its own weight, concrete pouring loads, construction machinery live loads, and wind loads, before forming an integrated load-bearing system. The performance of these temporary supports directly determines construction safety, project progress, and the final quality of the bridge.

[0003] As bridge engineering develops towards "larger spans, more complex terrains, and higher construction precision," the technical shortcomings of existing temporary support systems are becoming increasingly apparent, and they can no longer meet the construction requirements of ultra-long span bridges. Specifically:

[0004] I. Insufficient adaptability to ultra-large spans and disordered load transfer paths

[0005] The core limitation of existing truss or beam-column supports lies in the difficulty of achieving both span and stiffness in a single structure: when the span exceeds 40 meters, the deflection of the crossbeams in traditional supports easily exceeds the allowable range for construction, and the vertical and horizontal supports lack coordinated design. For example, the vertical columns of traditional supports only bear vertical loads, and the horizontal trusses only bear horizontal loads. The two do not form an integrated load transfer system, resulting in eccentric loads (such as uneven concrete pouring) and lateral wind loads during construction that cannot be transferred to the piers on both sides through a reasonable path, and severe stress concentration in local members (such as the central crossbeams and vertical columns).

[0006] Second, the fixation reliability with the bridge pier cap is poor, and the anti-slip and anti-uplift capabilities are weak.

[0007] The self-weight of ultra-long span scaffolding (a single scaffolding system often weighs hundreds of tons) and construction loads generate enormous vertical pressure and horizontal thrust, placing extremely high demands on the connection strength between the scaffolding and the bridge pier foundation. Existing scaffolding systems mostly employ methods such as "ground-embedded steel plates + welded columns" or "simple anchor bolt fixation," failing to achieve integrated fixation with the bridge pier foundation. Ground-embedded steel plates are prone to slippage due to geological settlement and lateral soil displacement; simple anchor bolts have limited pull-out resistance and cannot withstand the horizontal thrust under ultra-long spans, potentially causing overall scaffolding displacement, which in turn affects the accuracy of bridge reinforcement binding and concrete pouring, and may even lead to safety accidents.

[0008] Third, the structural modularity is low, resulting in poor construction efficiency and economy.

[0009] Existing ultra-large span supports are mostly customized welded structures, with the connection between members mainly relying on on-site welding, resulting in a very low degree of prefabrication. On the one hand, the quality of welded joints is greatly affected by the construction environment (such as temperature and humidity), and defects such as slag inclusion and incomplete penetration are prone to occur. Moreover, the members are difficult to reuse after disassembly, resulting in material waste. On the other hand, the hoisting of integral structures requires ultra-large lifting equipment (such as cranes of 500 tons or more), and the prefabrication, transportation, and hoisting cycles are long (the construction cycle of a single set of supports often reaches 1-2 months), which cannot meet the needs of bridge engineering for "rapid construction and shortened construction period". Summary of the Invention

[0010] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide an open-type load-bearing frame, support, and construction method for ultra-large span bridges, which solves the problems in the prior art that bridge supports cannot simultaneously meet the vertical and lateral support required for large spans, have poor stability, and cannot balance assembly efficiency and construction difficulty.

[0011] To address the aforementioned technical problems, this invention provides an open-type load-bearing frame for ultra-long span bridges, used to provide support for the bridge structure between two ultra-long span piers during the bridge construction phase, comprising:

[0012] The vertical support structure includes two first embedded parts and a second embedded part pre-embedded in the abutments of the two bridge piers, two vertical rods fixedly connected to the first embedded parts at their bottom ends, two sets of horizontal diagonal bracing brackets, and a middle horizontal rod. The horizontal diagonal bracing bracket is a V-shaped frame formed by side horizontal rods and one end of diagonal rods. The other end of the side horizontal rod is fixed to the top of a corresponding vertical rod, and the other end of the diagonal rod is fixed to the corresponding second embedded part. The opening of the V-shaped frame faces the corresponding vertical rod, and the side horizontal rod is horizontally positioned. An upper four-way pipe and a lower four-way pipe are provided in the middle of the diagonal rod. Both ends of the middle horizontal rod are connected to the horizontal diagonal bracing brackets on both sides, and the middle horizontal rod is flush with the side horizontal rods on both sides.

[0013] A transverse load-sharing structure includes a truss and two sets of upper and lower connecting pipes. One end of each upper and lower connecting pipe is fixed to a vertical rod, and the other end is connected to a horizontal end of an upper four-way pipe and a lower four-way pipe, respectively. The truss includes an upper chord, a lower chord, and a tie rod assembly disposed between the upper and lower chords. Both ends of the upper chord are connected to the other horizontal ends of the upper four-way pipes on both sides and are flush with the upper connecting pipes on both sides. Both ends of the lower chord are connected to the other horizontal ends of the lower four-way pipes on both sides and are flush with the lower connecting pipes on both sides.

[0014] As a preferred embodiment, the horizontal diagonal brace also includes a T-joint. One end of the side crossbar and diagonal bar is fixedly connected via the T-joint, and both ends of the middle crossbar are fixedly connected to the T-joints on both sides. The advantages are that the T-joint achieves integrated fixing of the side crossbar, diagonal bar, and middle crossbar. Compared to welding or bolting, the connection accuracy is higher, ensuring the angle and positional relationship of the three components and avoiding uneven stress caused by connection deviations. Simultaneously, the T-joint simplifies the assembly process, eliminating the need for complex positioning and calibration, improving construction efficiency, and providing high connection strength, effectively transferring the load between the three components and enhancing the overall stability of the horizontal diagonal brace.

[0015] As a more preferred embodiment, the horizontal diagonal brace further includes an end cap located at the other end of the diagonal rod, through which the diagonal rod is connected to the second embedded part. The advantage of this is that the connection between the diagonal rod and the second embedded part through the end cap increases the contact area between them, allowing the load to be evenly transferred from the diagonal rod to the bearing platform, preventing excessive local stress on the embedded part and thus avoiding concrete cracking or loosening. The end cap also facilitates positioning and alignment during diagonal rod hoisting, reducing installation deviations and improving construction convenience. Simultaneously, it enhances the firmness of the connection between the diagonal rod and the embedded part, ensuring it does not detach under long-term load-bearing conditions.

[0016] As a more preferred embodiment, the tie rod assembly includes multiple vertical and diagonal tie rods staggered between the upper and lower chords, with both ends of the vertical and diagonal tie rods fixed to the upper and lower chords respectively. The advantage lies in the fact that the staggered arrangement of the vertical and diagonal tie rods between the upper and lower chords forms a three-dimensional truss structure, significantly improving the truss's lateral stiffness and deformation resistance, and preventing the upper or lower chord from bending due to large spans. The staggered design of the tie rod assembly can quickly distribute local loads throughout the truss, reducing stress concentration, ensuring stable stress distribution in ultra-large span supports, and extending the structural service life.

[0017] As a more preferred embodiment, the tie rod assembly further includes multiple pairs of right-angle clamps and bevel clamps. The two ends of the right-angle clamps are located at the two ends of the vertical tie rod and are fixed to the upper chord and lower chord, respectively. The bevel clamps are located at the two ends of the diagonal tie rod and are fixed to the upper chord and lower chord, respectively. The advantages are that the right-angle clamps and bevel clamps are adapted to the connection angles between the vertical tie rod, diagonal tie rod, and chord, respectively, achieving a secure fixation without welding. This simplifies the assembly and disassembly process, reducing construction difficulty and maintenance costs. The detachable design of the clamps facilitates later inspection or structural adjustments, while ensuring a tight fit between the tie rod and chord, preventing loosening due to vibration, and improving the stability of the truss structure.

[0018] As a preferred method, the middle and top of the vertical member are fixed to the pier via connectors. This has the advantage of providing additional support at the bottom, middle, and top, effectively suppressing bending deformation caused by excessive height or lateral loads and enhancing the vertical member's resistance to lateral pressure. This multi-point fixing method allows the vertical member and pier to form a collaborative force-bearing system, further stabilizing the overall load-bearing frame, and is particularly suitable for bridge construction scenarios with high piers and long spans.

[0019] To address the above problems, the present invention also provides a support structure for ultra-long span bridges, comprising:

[0020] Multiple sets of the aforementioned ultra-long span bridge open-type load-bearing frames are arranged in parallel between the two bridge piers.

[0021] Several connecting rods connect adjacent pairs of open-type load-bearing frames of ultra-large span bridges.

[0022] The supporting structure is fixedly installed on multiple sets of open-type load-bearing frames of the ultra-large span bridge to support the bridge body.

[0023] As a preferred approach, the support structure includes Bailey bridges, distribution beams, and multiple load-bearing beams. The load-bearing beams are evenly distributed on the open-type load-bearing frame of the ultra-long span bridge. The Bailey bridges are mounted on the load-bearing beams, and the distribution beams are mounted on the Bailey bridges. The advantage lies in the fact that the three-layer design of the support structure—load-bearing beams, Bailey bridges, and distribution beams—forms a gradient load transfer system: the load-bearing beams distribute the load to the load-bearing frame, the Bailey bridges utilize their high strength to bear the main load, and the distribution beams further evenly distribute the load to the bridge body, ensuring stable stress distribution during bridge construction and avoiding localized settlement or deformation. This classic multi-layer support structure is mature and reliable, suitable for the high load requirements of ultra-long span bridges, and facilitates standardized assembly, improving construction efficiency.

[0024] As a preferred approach, the upper ends of the vertical members of the two outermost open-type load-bearing frames of the ultra-long span bridge are equipped with V-braces and diagonal bracing tubes. The diagonal bracing tubes are fixed to the upward-facing outer supports of the V-braces and extend outwards from the outermost open-type load-bearing frame of the ultra-long span bridge to share the load. The beneficial effect is that the outward extension of the V-braces and diagonal bracing tubes of the outer load-bearing frame effectively shares the lateral load of the outer frame, balances the force on the bridge edge, and prevents the outer frame from tilting or deforming due to unilateral force. The extended design of the diagonal bracing tubes expands the stress range of the support, improves the overall anti-overturning capacity of the support system, and is particularly suitable for the outer support of wide-span bridges, ensuring overall force balance of the support system.

[0025] To address the aforementioned problems, the present invention also provides a construction method for an ultra-long span bridge support structure, comprising:

[0026] Constructing an open-type load-bearing frame for an ultra-long span bridge: First, before the construction of the abutments of the two piers, install the first and second embedded parts; then, after the pier construction is completed, install vertical rods on the two abutments, with the bottom of the vertical rods fixed to the first embedded part; next, pre-assemble two horizontal diagonal bracing supports, and hoist the assembled horizontal diagonal bracing supports, fixing the other end of the side horizontal rod to the top of the vertical rod, and the other end of the diagonal rod to the second embedded part; then, horizontally hoist the middle horizontal rod, connecting both ends of the middle horizontal rod to the sides... A horizontal diagonal brace is connected, keeping the middle crossbar flush with the side crossbars on both sides; then the upper and lower connecting pipes are horizontally hoisted, with one end of the upper and lower connecting pipes fixed to the vertical bar, and the other end connected to one horizontal end of the upper and lower four-way pipes respectively; then the upper and lower chords are horizontally hoisted, with both ends of the upper chord connected to the other horizontal end of the upper four-way pipes on both sides, and both ends of the lower chord connected to the other horizontal end of the lower four-way pipes on both sides; finally, several tie rod assemblies are hoisted between the upper and lower chords.

[0027] Repeat the above steps to build at least two of the aforementioned ultra-large span bridge open-type load-bearing frames, with adjacent two of the aforementioned ultra-large span bridge open-type load-bearing frames connected by several connecting rods;

[0028] A support structure is erected on the open-type load-bearing frame of the ultra-long span bridge.

[0029] As described above, the open-type load-bearing frame, support, and construction method for ultra-long span bridges of the present invention have the following beneficial effects:

[0030] The vertical support structure of the open-type load-bearing frame for ultra-large span bridges of this invention is fixed by the first and second embedded parts in the pier caps, vertical rods, and horizontal diagonal braces, forming a triangular stable force-bearing system of "vertical rods, diagonal rods, and embedded parts". This system can effectively distribute the vertical load of the bridge body, avoid local overload, and meet the support requirements between ultra-large span bridge piers. The truss of the lateral load-sharing structure, in conjunction with the upper connecting pipe, lower connecting pipe, and four-way pipe, evenly transfers the lateral load to the support structures on both sides, enhancing the frame's resistance to lateral displacement. The design of the middle horizontal rod being flush with the side horizontal rods and the upper and lower chords being flush with the connecting rods ensures a clear force path, reduces stress concentration, and the overall structure takes into account both vertical and lateral load-bearing capacity, providing stable support for the construction of ultra-large span bridges. At the same time, the entire open-type load-bearing frame for ultra-large span bridges is supported by the pier caps on both sides, eliminating the need to set up other support structures between the piers or demolish the existing structure, making it particularly suitable for bridge construction scenarios in rivers and deep valleys.

[0031] The ultra-long span bridge support of this invention consists of multiple sets of ultra-long span bridge open-type load-bearing frames arranged in parallel and connected by connecting rods to form an integrated bridge support. This expands the support area, adapts to bridge structures of different widths, eliminates the need for separate design of individual wide frames, and improves the equipment's versatility. The connecting rods connect multiple sets of frames into one unit, ensuring that the load is evenly distributed among the frames, preventing overloading of any single frame, and enhancing the overall vibration and overturning resistance of the support, making it suitable for complex construction environments.

[0032] The construction method for ultra-large span bridge supports of this invention involves first precisely assembling individual frames, then connecting them as a whole, and finally erecting the support structure. This effectively controls construction deviations and ensures structural accuracy. Phased construction facilitates quality control, avoids safety hazards caused by chaotic procedures, and improves construction efficiency, adapting to the complex construction requirements of ultra-large span bridge supports. Furthermore, throughout the construction process, the two sets of horizontal diagonal bracing supports are installed using a pre-positioning and then hoisting method, balancing assembly efficiency with construction difficulty.

[0033] In summary, the open-type load-bearing frame, support, and construction method for ultra-long span bridges of the present invention improve the load-bearing capacity of long span bridges for both lateral and vertical loads through vertical support structures and lateral load-sharing structures. This solves the problems in the prior art where bridge supports cannot simultaneously meet the vertical and lateral support requirements of long spans, have poor stability, and cannot balance assembly efficiency and construction difficulty. Attached Figure Description

[0034] Figure 1 The diagram shown is a structural schematic of the open-type load-bearing frame and support for ultra-large span bridges of the present invention.

[0035] Figure 2 The diagram shown is a schematic diagram of the construction method S01 for ultra-large span bridge supports of the present invention;

[0036] Figure 3 The diagram shown is a schematic diagram of the construction method S02 for ultra-large span bridge supports of the present invention;

[0037] Figure 4 The diagram shown is a schematic diagram of the construction method S03 for ultra-large span bridge supports of the present invention;

[0038] Figure 5 The diagram shown is a schematic diagram of the construction method S04 for ultra-large span bridge supports of the present invention;

[0039] Figure 6 The diagram shown is a schematic diagram of the construction method S05 for ultra-large span bridge supports of the present invention;

[0040] Figure 7 The diagram shown is a schematic diagram of the construction method S06 for ultra-large span bridge supports of the present invention;

[0041] Figure 8 The diagram shown is a schematic diagram of the construction method S07 for ultra-large span bridge supports of the present invention;

[0042] Figure 9 The diagram shown is a schematic diagram of the construction method S08 for ultra-large span bridge supports of the present invention;

[0043] Figure 10 The diagram shown is a schematic diagram of the construction method S09 for ultra-large span bridge supports of the present invention;

[0044] Figure 11 The diagram shown is a schematic diagram of the construction method S10 for ultra-large span bridge supports of the present invention;

[0045] Figure 12 The image shown is a partial schematic diagram from a normal perspective of the open-type load-bearing frame and support for ultra-large span bridges of the present invention.

[0046] Component designation explanation

[0047] 1 Vertical support structure 11 First embedded part 12 Second embedded part 13 vertical pole 131 Eight-character support 132 diagonal bracing tube 14 Horizontal diagonal brace support 141 Side crossbar 142 diagonal bar 143 Top four-way pipe 144 Bottom four-way pipe 145 Tee pipe 146 end 15 middle crossbar 2 Lateral load sharing structure 21 upper connecting pipe 22 lower connecting pipe 23 truss 231 upper chord 232 lower chord 233 tie rod assembly 233a Vertical tie rod 233b Diagonal tie rod 233c Right-angle hoop 233d Angled clamp 3 connector 4 Connecting rod 5 Vertical clamps 6 Double channel steel 7 load-bearing beam 8 Bailey Beam 9 Distribution beam 10 Bridge piers 101 platform Detailed Implementation

[0048] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0049] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit the application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0052] like Figures 1 to 12 As shown, this invention provides an open-type load-bearing frame for ultra-long span bridges, used to provide support for the bridge structure between two ultra-long span piers 10 during the bridge construction phase, comprising:

[0053] A vertical support structure 1 includes two first embedded parts 11 and a second embedded part 12 pre-embedded in the foundation 101 of the two piers 10 respectively, two vertical rods 13 fixedly connected to the first embedded parts 11 at their bottom ends, two sets of horizontal diagonal bracing brackets 14, and a middle horizontal rod 15. The horizontal diagonal bracing bracket 14 is a V-shaped frame formed by fixing one end of the side horizontal rod 141 and the diagonal rod 142. The other end of the side horizontal rod 141 is fixed to the top of the corresponding vertical rod 13, and the other end of the diagonal rod 142 is fixed to the corresponding second embedded part 12. The opening of the V-shaped frame faces the corresponding vertical rod 13 and the side horizontal rod 141 is set horizontally. At the same time, the middle part of the diagonal rod 142 is provided with an upper four-way pipe 143 and a lower four-way pipe 144. The two ends of the middle horizontal rod 15 are respectively connected to the horizontal diagonal bracing brackets 14 on both sides, and the middle horizontal rod 15 is flush with the side horizontal rods 141 on both sides.

[0054] The transverse load-sharing structure 2 includes a truss 23 and two sets of upper connecting pipes 21 and lower connecting pipes 22. One end of the upper connecting pipe 21 and the lower connecting pipe 22 is fixed to the vertical rod 13, and the other end is connected to a horizontal end of the upper four-way pipe 143 and the lower four-way pipe 144, respectively. The truss 23 includes an upper chord 231, a lower chord 232, and a tie rod assembly 233 disposed between the upper chord 231 and the lower chord 232. Both ends of the upper chord 231 are connected to the other horizontal ends of the upper four-way pipes 143 on both sides, and are flush with the upper connecting pipes 21 on both sides. Both ends of the lower chord 232 are connected to the other horizontal ends of the lower four-way pipes 144 on both sides, and are flush with the lower connecting pipes 22 on both sides.

[0055] To better illustrate the open-type load-bearing frame for ultra-large span bridges of the present invention, let's first explain it in conjunction with the following specific application: The vertical support structure 1 of the open-type load-bearing frame for ultra-large span bridges of the present invention is fixed to the vertical rod 13 and the horizontal diagonal brace 14 by the first and second embedded parts 12 pre-embedded in the pier cap 101, forming a triangular stable force system of "vertical rod 13, diagonal rod 142 and embedded parts", which can effectively disperse the vertical load of the bridge body, avoid local overload, and adapt to the support requirements between ultra-large span bridge piers 10. The truss 23 of the transverse load-sharing structure 2, in conjunction with the upper connecting pipe 21, the lower connecting pipe 22, and the four-way pipe, evenly distributes the transverse load to the supporting structures on both sides, enhancing the frame's resistance to lateral displacement. The design of the middle crossbar 15 being flush with the side crossbar 141 and the upper and lower chords 232 being flush with the connecting rod 4 ensures a clear force path, reduces stress concentration, and the overall structure takes into account both vertical and transverse bearing capacity, providing stable support for the construction of ultra-large span bridges. At the same time, the entire open-type bearing frame of the ultra-large span bridge is supported by the abutments 101 on both sides, eliminating the need to set up other supporting structures between the piers 10 and to demolish the existing structure, making it particularly suitable for bridge construction scenarios in rivers and deep valleys.

[0056] In some possible embodiments of the present invention, such as Figure 1 As shown, the horizontal diagonal brace 14 also includes a three-way pipe 145. One end of the side crossbar 141 and the diagonal bar 142 are fixedly connected through the three-way pipe 145, and both ends of the middle crossbar 15 are fixedly connected to the three-way pipes 145 on both sides respectively. The advantage is that the three-way pipe 145 achieves integrated fixing of the side crossbar 141, the diagonal bar 142, and the middle crossbar 15. Compared with welding or bolt splicing, the connection accuracy is higher, ensuring the angle and positional relationship of the three components and avoiding uneven stress caused by connection deviations. At the same time, the three-way pipe 145 simplifies the assembly process, eliminating the need for complex positioning and calibration, improving construction efficiency, and providing high connection strength, effectively transferring the load between the three components and enhancing the overall stability of the horizontal diagonal brace 14.

[0057] In some possible embodiments of the present invention, such as Figure 1 As shown, the horizontal diagonal brace 14 also includes an end cap 146 disposed at the other end of the diagonal rod 142. The diagonal rod 142 is connected to the second embedded part 12 through the end cap 146. The beneficial effect is that the connection between the diagonal rod 142 and the second embedded part 12 via the end cap 146 increases the contact area between the diagonal rod 142 and the embedded part, allowing the load to be evenly transferred from the diagonal rod 142 to the bearing platform 101, avoiding excessive local stress on the embedded part that could lead to concrete cracking or loosening. The end cap 146 also facilitates the positioning and connection of the diagonal rod 142 during hoisting, reducing installation deviations, improving construction convenience, and simultaneously enhancing the firmness of the connection between the diagonal rod 142 and the embedded part, ensuring it does not detach during long-term load-bearing.

[0058] In some possible embodiments of the present invention, such as Figure 1 As shown, the tie rod assembly 233 includes multiple vertical tie rods 233a and diagonal tie rods 233b staggered between the upper chord 231 and the lower chord 232. The two ends of the vertical tie rods 233a and diagonal tie rods 233b are respectively fixed to the upper chord 231 and the lower chord 232. Its beneficial effect is that the staggered arrangement of the vertical tie rods 233a and diagonal tie rods 233b between the upper chord 231 and the lower chord 232 forms a three-dimensional truss structure 23, significantly improving the lateral stiffness and deformation resistance of the truss 23, and preventing the upper chord 231 or the lower chord 232 from bending due to the large span. The staggered design of the tie rod assembly 233 can quickly distribute local loads to the entire truss 23, reducing stress concentration, ensuring the truss 23 is stably stressed in ultra-large span support, and extending the service life of the structure.

[0059] In some possible embodiments of the present invention, such as Figure 1 As shown, the tie rod assembly 233 also includes multiple pairs of right-angle clamps 233c and oblique-angle clamps 233d. The two ends of the right-angle clamps 233c are located at the two ends of the vertical tie rod 233a and are fixed to the upper chord 231 and lower chord 232, respectively. The oblique-angle clamps 233d are located at the two ends of the oblique tie rod 233b and are fixed to the upper chord 231 and lower chord 232, respectively. The advantage is that the right-angle clamps 233c and oblique-angle clamps 233d are adapted to the connection angles between the vertical tie rod 233a and the oblique tie rod 233b and the chord, respectively, achieving a firm fixation without welding. This simplifies the assembly and disassembly process, reduces construction difficulty and maintenance costs. The detachable design of the clamps facilitates later inspection or structural adjustment, while ensuring a tight fit between the tie rod and the chord, preventing loosening due to vibration, and improving the stability of the truss 23 structure.

[0060] In some possible embodiments of the present invention, such as Figure 1As shown, the vertical tie rods 233a and diagonal tie rods 233b are symmetrically and evenly spaced between the upper chord 231 and the lower chord 232. The beneficial effect is that the symmetrical and evenly spaced arrangement of the vertical tie rods 233a and diagonal tie rods 233b ensures uniform stress distribution on the truss 23, eliminating local weak points and improving the symmetry and stability of the structure. The evenly spaced design facilitates positioning and installation during construction, reduces measurement and calibration time, improves assembly efficiency, and simultaneously makes the truss 23 respond more smoothly under dynamic loads, avoiding structural damage caused by local resonance.

[0061] In some possible embodiments of the present invention, such as Figure 1 As shown, the middle and top of the vertical rod 13 are fixed to the pier 10 via connector 3. The beneficial effect is that the additional fixation of the middle and top of the vertical rod 13 to the pier 10 forms a three-point support system (bottom, middle, and top), effectively suppressing bending deformation of the vertical rod 13 due to excessive height or lateral loads, and improving the lateral pressure resistance of the vertical rod 13. This multi-point fixing method allows the vertical rod 13 and the pier 10 to form a collaborative force-bearing system, further stabilizing the overall load-bearing frame, and is particularly suitable for bridge construction scenarios with high piers and long spans.

[0062] To solve the above problems, such as Figure 10 As shown, the present invention also provides a support structure for ultra-large span bridges, comprising:

[0063] Multiple sets of the above-mentioned ultra-large span bridge open-type load-bearing frames are arranged in parallel between the two piers 10.

[0064] Several connecting rods 4 connect adjacent pairs of open-type load-bearing frames of ultra-large span bridges;

[0065] The supporting structure is fixedly installed on multiple sets of open-type load-bearing frames of the ultra-large span bridge to support the bridge body.

[0066] To better illustrate the ultra-large span bridge support of the present invention, the following specific application will be used as an example: The ultra-large span bridge support of the present invention consists of multiple sets of ultra-large span bridge open-type bearing frames arranged in parallel and connected by connecting rods 4, such as... Figure 12 As shown, an integrated bridge support structure is formed, which can expand the support area and adapt to bridge structures of different widths. It eliminates the need for separate design of single wide frames, thus improving the versatility of the equipment. Connecting rod 4 connects multiple frames into one unit, so that the load is evenly distributed among the frames, avoiding overloading of a single frame, while enhancing the overall vibration resistance and overturning resistance of the support structure, and adapting to complex construction environments.

[0067] In some possible embodiments of the present invention, such as Figure 1As shown, the supporting structure includes Bailey beams 8, distribution beams 9, and multiple load-bearing beams 7. The load-bearing beams 7 are evenly distributed on the open-type load-bearing frame of the ultra-long span bridge. The Bailey beams 8 are mounted on the load-bearing beams 7, and the distribution beams 9 are mounted on the Bailey beams 8. The beneficial effect is that the three-layer design of the supporting structure—load-bearing beams 7, Bailey beams 8, and distribution beams 9—forms a gradient load transfer system: the load-bearing beams 7 distribute the load to the load-bearing frame, the Bailey beams 8 utilize their high strength characteristics to bear the main load, and the distribution beams 9 further evenly distribute the load to the bridge body, ensuring stable stress distribution during bridge construction and avoiding local settlement or deformation. This classic multi-layered supporting structure is mature and reliable, suitable for the high load requirements of ultra-long span bridges, and facilitates standardized assembly, improving construction efficiency.

[0068] In some possible embodiments of the present invention, such as Figure 9 as well as Figure 11 As shown, the upper ends of the vertical members 13 of the two outermost open-type load-bearing frames of the ultra-long span bridge are provided with V-braces 131 and diagonal bracing tubes 132. The diagonal bracing tubes 132 are fixed to the upward-facing outer support ends of the V-braces 131, and extend outwards towards the outer side of the open-type load-bearing frame of the ultra-long span bridge to share the load. The beneficial effect is that the outward extension of the V-braces 131 and diagonal bracing tubes 132 of the outer load-bearing frame can effectively share the lateral load of the outer frame, balance the force on the bridge edge, and prevent the outer frame from tilting or deforming due to unilateral force. The extended design of the diagonal bracing tubes 132 expands the stress range of the support, improves the overall anti-overturning capacity of the support, and is especially suitable for the outer support of wide-span bridges, ensuring the overall stress balance of the support.

[0069] In some possible embodiments of the present invention, such as Figure 1 As shown, the connecting rod 4 is used to connect the upper part of the adjacent open-type load-bearing frame of the ultra-large span bridge. The ultra-large span bridge support also includes multiple vertical clamps 5 and double-channel steel 6 for connecting the middle and lower parts of the open-type load-bearing frame of the ultra-large span bridge. The two ends of the double-channel steel 6 are respectively connected to the vertical clamps 5, and the vertical clamps 5 at both ends are respectively fixed to the ultra-large span bridge support on both sides. The connecting rod 4 and the double-channel steel 6 are evenly distributed between the open-type load-bearing frames of the ultra-large span bridge. Its beneficial effect is that the all-round connection of the connecting rod 4, vertical clamps 5 and double-channel steel 6 fixes the adjacent load-bearing frames from the top, bottom and middle dimensions, forming a three-dimensional reinforcement structure, avoiding relative displacement between frames and improving the overall rigidity. The double-channel steel 6 has high strength and strong bending resistance, and can withstand greater lateral forces in the lower part of the frame. Combined with the evenly distributed connecting components, the multiple frames work together more closely to adapt to the complex load environment of the ultra-large span support.

[0070] In some possible embodiments of the present invention, such as Figure 1 As shown, the support structure includes four load-bearing beams 7, which are arranged perpendicular to the side crossbars 141. Two of these beams are fixed to the ends of the vertical bars 13 and the diagonal bracing pipes 132 on both sides of the open-type load-bearing frame of the ultra-long span bridge, while the other two are mounted on the tee pipes 145. The advantage of this arrangement is that the four load-bearing beams 7, respectively fixed to the vertical bars 13, the ends of the diagonal bracing pipes 132, and the tee pipes 145, achieve precise alignment between the support structure and the key stress-bearing parts of the load-bearing frame, evenly distributing the bridge load to the core load-bearing points of the load-bearing frame and avoiding localized stress concentration. The load-bearing beams 7, arranged perpendicular to the side crossbars 141, are adapted to the stress direction of the bridge structure, further improving the stability of the support and ensuring structural accuracy during bridge construction.

[0071] To solve the above problems, such as Figures 2 to 11 As shown, the present invention also provides a construction method for an ultra-long span bridge support, for constructing the aforementioned ultra-long span bridge support, comprising:

[0072] Constructing an open-type load-bearing frame for an ultra-long span bridge: First, before construction of the abutments 101 where the two piers 10 are located, install the first embedded part 11 and the second embedded part 12; then, after the piers 10 are constructed, install vertical rods 13 on the two abutments 101 respectively, with the bottom of the vertical rods 13 fixed to the first embedded part 11; next, pre-assemble two horizontal diagonal bracing supports 14, and hoist the assembled horizontal diagonal bracing supports 14, fixing the other end of the side horizontal rod 141 to the top of the vertical rod 13, and fixing the other end of the diagonal rod 142 to the second embedded part 12; then, horizontally hoist the middle horizontal rod 15, and connect both ends of the middle horizontal rod 15 to the horizontal diagonal bracing supports on both sides respectively. Connect 14 and keep the middle crossbar 15 flush with the side crossbars 141 on both sides; then horizontally hoist the upper connecting pipe 21 and the lower connecting pipe 22, fix one end of the upper connecting pipe 21 and the lower connecting pipe 22 to the vertical bar 13, and connect the other end to one horizontal end of the upper four-way pipe 143 and the lower four-way pipe 144 respectively; then horizontally hoist the upper chord bar 231 and the lower chord bar 232, connect both ends of the upper chord bar 231 to the other horizontal end of the upper four-way pipe 143 on both sides respectively, and connect both ends of the lower chord bar 232 to the other horizontal end of the lower four-way pipe 144 on both sides respectively; finally, hoist several tie rod assemblies 233 between the upper chord bar 231 and the lower chord bar 232.

[0073] Repeat the above steps to build at least two of the aforementioned ultra-large span bridge open-type load-bearing frames, and connect adjacent two of the aforementioned ultra-large span bridge open-type load-bearing frames with several connecting rods 4;

[0074] A support structure is erected on the open-type load-bearing frame of the ultra-long span bridge.

[0075] To better illustrate the construction method for ultra-large span bridge supports of the present invention, the following specific application is used as an example: The construction method for ultra-large span bridge supports of the present invention first precisely assembles individual frames, then connects them as a whole, and finally erects the support structure. This effectively controls construction deviations and ensures structural accuracy. Phased construction facilitates quality control, avoids safety hazards caused by chaotic procedures, and improves construction efficiency, adapting to the complex construction requirements of ultra-large span bridge supports. Furthermore, during the entire construction process, the two sets of horizontal diagonal bracing supports 14 are installed by pre-positioning and then hoisting, balancing assembly efficiency and construction difficulty. It can be seen that the ultra-large span bridge open-type load-bearing frame, supports, and construction method of the present invention, through the vertical support structure 1 and the transverse load-sharing structure 2, improves the load-bearing capacity of the large-span bridge body for both lateral and vertical loads, solving the problems of existing bridge supports that cannot simultaneously meet the vertical and lateral support requirements of large spans, have poor stability, and cannot balance assembly efficiency and construction difficulty.

[0076] More specifically, in some possible embodiments of the present invention, the construction method for the support structure of ultra-long span bridges includes the following steps:

[0077] S01: Before the construction of the foundation 101 where the two piers 10 are located, install the first embedded part 11 and the second embedded part 12; after the construction of the piers 10 is completed, install vertical rods 13 on the two foundation 101 respectively, the bottom of the vertical rod 13 is fixed to the first embedded part 11, and the middle and top of the vertical rod 13 are fixed to the piers 10 through connectors 3; Figure 2 As shown;

[0078] S02: Pre-assemble two horizontal diagonal brace brackets 14. The horizontal diagonal brace bracket 14 is a V-shaped structure formed by fixing one end of a side crossbar 141 and a diagonal bar 142. An upper four-way pipe 143 and a lower four-way pipe 144 are provided on the middle part of the diagonal bar 142. Figure 3 As shown;

[0079] S03: Hoist the horizontal diagonal brace 14, fix the other end of the side horizontal bar 141 to the top of the vertical bar 13, fix the other end of the diagonal bar 142 to the second embedded part 12, the opening of the V-shaped structure faces the vertical bar 13 and the side horizontal bar 141 is set horizontally; Figure 4 As shown;

[0080] S04: Horizontal hoisting center crossbar 15, the two ends of which are connected to the horizontal diagonal bracing supports 14 on both sides, and the center crossbar 15 is flush with the side crossbars 141 on both sides; for example Figure 5 As shown;

[0081] S05: Horizontally hoist the upper connecting pipe 21 and the lower connecting pipe 22. One end of the upper connecting pipe 21 and the lower connecting pipe 22 is fixed to the vertical rod 13, and the other end of the upper connecting pipe 21 and the lower connecting pipe 22 is respectively connected to a horizontal end of the upper four-way pipe 143 and the lower four-way pipe 144; For example... Figure 6 As shown;

[0082] S06: Horizontally hoist the upper chord 231 and lower chord 232. Both ends of the upper chord 231 are connected to the other horizontal ends of the upper four-way pipes 143 on both sides, and are flush with the upper connecting pipes 21 on both sides; both ends of the lower chord 232 are connected to the other horizontal ends of the lower four-way pipes 144 on both sides, and are flush with the lower connecting pipes 22 on both sides; For example... Figure 7 As shown;

[0083] S07: Several vertical tie rods 233a and diagonal tie rods 233b are suspended between the upper chord 231 and the lower chord 232, with the two ends of the vertical tie rods 233a and diagonal tie rods 233b respectively fixed to the upper chord 231 and the lower chord 232; Figure 8 As shown;

[0084] S08: An octagonal brace 131 and a diagonal brace tube 132 are provided at the upper end of the vertical rod 13; such as Figure 9 As shown;

[0085] S09: Repeat S01~S08 to construct another ultra-large span bridge open-type load-bearing frame; such as Figure 10 As shown;

[0086] S10: Multiple connecting rods 4 are used to connect the upper part of the adjacent open-type load-bearing frame of the ultra-large span bridge, and multiple vertical clamps 5 and double-channel steel 6 are used to connect the middle and lower parts of the open-type load-bearing frame of the ultra-large span bridge; such as Figure 11 As shown;

[0087] S11: On the open-type load-bearing frame of the ultra-long span bridge, load-bearing beams 7, Bailey beams 8, and distribution beams 9 are sequentially erected, with the distribution beams 9 directly bearing the bridge load; for example... Figure 1 As shown.

[0088] As described above, the open-type load-bearing frame, support, and construction method for ultra-long span bridges of the present invention have the following beneficial effects:

[0089] 1. Vertical support structure 1

[0090] The vertical support structure 1 is fixed to the first and second embedded parts 12, the vertical rod 13, and the horizontal diagonal brace 14 by pre-embedded parts 12 in the pier cap 101, forming a stable triangular force system, which effectively disperses the vertical load of the bridge body, avoids local overload, and adapts to the support requirements between the piers 10 of the super-large span bridge.

[0091] 2. Lateral load sharing structure 2

[0092] The truss 23 of the transverse load sharing structure 2 works with the upper connecting pipe 21, the lower connecting pipe 22, and the four-way pipe to evenly transfer the transverse load to the supporting structures on both sides, thereby enhancing the frame's resistance to lateral displacement.

[0093] 3. Clear force path

[0094] The design of the middle crossbar 15 being flush with the side crossbar 141 and the upper and lower chords 232 being flush with the connecting rod 4 ensures a clear force path, reduces stress concentration, and the overall structure takes into account both vertical and horizontal load-bearing capacity.

[0095] 4. 145 T-connector

[0096] The three-way tube 145 enables the integrated fixing of the side crossbar 141, diagonal bar 142 and middle crossbar 15, resulting in higher connection accuracy. It can ensure the angle and positional relationship of the three, avoid uneven force due to connection deviation, and simplify the assembly process.

[0097] 5. End connector 146 connection

[0098] The diagonal brace 142 is connected to the second embedded part 12 through the end 146, which increases the contact area between the diagonal brace 142 and the embedded part, so that the load is evenly transferred from the diagonal brace 142 to the foundation 101, avoiding concrete cracking or loosening caused by excessive local stress on the embedded part.

[0099] 6. Tie rod assembly 233

[0100] Vertical tie rods 233a and diagonal tie rods 233b are staggered between the upper chord 231 and the lower chord 232 to form a three-dimensional truss structure 23, which greatly improves the lateral stiffness and deformation resistance of the truss 23 and prevents the upper chord 231 or the lower chord 232 from bending due to the large span.

[0101] 7. Clamping design

[0102] The right-angle clamp 233c and the oblique-angle clamp 233d are adapted to the connection angles of the vertical tie rod 233a and the oblique tie rod 233b with the chord rod, respectively. They can achieve firm fixation without welding, simplifying the assembly and disassembly process and reducing construction difficulty and maintenance costs.

[0103] 8. Symmetrical and evenly spaced tie rods

[0104] The vertical tie rods 233a and the diagonal tie rods 233b are symmetrically and evenly spaced to ensure that the truss 23 is evenly stressed, with no local weak points, thereby improving the symmetry and stability of the structure.

[0105] 9. Multi-point fixed vertical rod 13

[0106] The middle and top of the vertical member 13 are additionally fixed to the pier 10 to form a three-point support, which effectively suppresses the bending deformation of the vertical member 13 due to excessive height or lateral load, and improves the lateral pressure resistance of the vertical member 13.

[0107] The open-type load-bearing frame for ultra-long span bridges of this invention effectively solves the problems of existing bridge supports being unable to simultaneously meet the vertical and horizontal support requirements for large spans, exhibiting poor stability, and failing to balance assembly efficiency and construction difficulty. The vertical support structure 1 is fixed to the vertical rods 13 and horizontal diagonal braces 14 via embedded parts, forming a stable triangular force-bearing system that effectively distributes the vertical load of the bridge body. The truss 23 of the horizontal load-bearing structure 2, in conjunction with connecting pipes and four-way pipes, evenly transfers the horizontal load to the support structures on both sides, enhancing the frame's resistance to lateral displacement. A clear force path design ensures the overall structural stability. The use of three-way pipes 145 and end caps 146 simplifies the assembly process and improves construction efficiency. The tie rod assembly 233 and clamp design further enhance the lateral stiffness and deformation resistance of the truss 23. Multi-point fixed vertical rods 13 improve their resistance to lateral pressure, making them suitable for bridge construction scenarios with high piers and long spans. This innovative design not only improves the overall performance of bridge supports, but also significantly reduces construction costs and enhances the market competitiveness of bridge supports.

[0108] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0109] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An open-type load-bearing frame for ultra-long span bridges, used to provide support for the bridge structure between two ultra-long span piers (10) during the bridge construction phase, characterized in that, include: A vertical support structure (1) includes two first embedded parts (11) and a second embedded part (12) pre-embedded in the foundation (101) of the two side piers (10), two vertical rods (13) fixedly connected to the bottom of the first embedded parts (11), two sets of horizontal diagonal bracing brackets (14) and a middle crossbar (15); wherein the horizontal diagonal bracing bracket (14) is a V-shaped frame formed by fixing one end of the side crossbar (141) and the diagonal rod (142), and the other end of the side crossbar (141) The end of the diagonal rod (142) is fixed to the top of the corresponding vertical rod (13), and the other end of the diagonal rod (142) is fixed to the corresponding second embedded part (12). The opening of the V-shaped frame faces the corresponding vertical rod (13) and the side horizontal rod (141) is set horizontally. At the same time, the middle part of the diagonal rod (142) is provided with an upper four-way pipe (143) and a lower four-way pipe (144). The two ends of the middle horizontal rod (15) are respectively connected to the horizontal diagonal bracing (14) on both sides, and the middle horizontal rod (15) is flush with the side horizontal rods (141) on both sides. A transverse load-sharing structure (2) includes a truss (23) and two sets of upper connecting pipes (21) and lower connecting pipes (22); one end of the upper connecting pipe (21) and the lower connecting pipe (22) is fixed to the vertical rod (13), and the other end is connected to one horizontal end of the upper four-way pipe (143) and the lower four-way pipe (144), respectively; the truss (23) includes an upper chord (231), a lower chord (232) and a tie rod assembly (233) disposed between the upper chord (231) and the lower chord (232); both ends of the upper chord (231) are connected to the other horizontal end of the upper four-way pipes (143) on both sides, and are flush with the upper connecting pipes (21) on both sides; both ends of the lower chord (232) are connected to the other horizontal end of the lower four-way pipes (144) on both sides, and are flush with the lower connecting pipes (22) on both sides; The tie rod assembly (233) includes a plurality of vertical tie rods (233a) and diagonal tie rods (233b) staggered between the upper chord (231) and the lower chord (232), with the two ends of the vertical tie rods (233a) and the diagonal tie rods (233b) respectively fixed to the upper chord (231) and the lower chord (232); The tie rod assembly (233) also includes multiple sets of right-angle clamps (233c) and oblique-angle clamps (233d) arranged in pairs. The two ends of the right-angle clamps (233c) are located at the two ends of the vertical tie rod (233a) and are fixed to the upper chord (231) and the lower chord (232) respectively. The oblique-angle clamps (233d) are located at the two ends of the oblique tie rod (233b) and are fixed to the upper chord (231) and the lower chord (232) respectively.

2. The open-type load-bearing frame for ultra-long span bridges according to claim 1, characterized in that: The horizontal diagonal brace (14) also includes a three-way pipe (145). One end of the side crossbar (141) and the diagonal bar (142) are fixedly connected through the three-way pipe (145), and the two ends of the middle crossbar (15) are fixedly connected to the three-way pipes (145) on both sides respectively.

3. The open-type load-bearing frame for ultra-long span bridges according to claim 1, characterized in that: The horizontal diagonal brace (14) also includes an end (146) disposed at the other end of the diagonal rod (142), and the diagonal rod (142) is connected to the second embedded part (12) through the end (146).

4. The open-type load-bearing frame for ultra-long span bridges according to claim 1, characterized in that: The middle and top of the vertical rod (13) are fixed to the pier (10) by a connector (3).

5. A support structure for ultra-large span bridges, characterized in that, include: Multiple sets of open-type bearing frames for ultra-long span bridges as described in any one of claims 1 to 4, wherein multiple sets of open-type bearing frames for ultra-long span bridges are arranged in parallel between two of the bridge piers (10); Several connecting rods (4) are used to connect adjacent pairs of open-type load-bearing frames of super-large span bridges; The supporting structure is fixedly installed on multiple sets of open-type load-bearing frames of the ultra-large span bridge to support the bridge body.

6. The bridge support for ultra-long span bridges according to claim 5, characterized in that: The supporting structure includes Bailey beams (8), distribution beams (9) and multiple load-bearing beams (7). The multiple load-bearing beams (7) are evenly arranged on the open-type load-bearing frame of the ultra-long span bridge. The Bailey beams (8) are arranged on the load-bearing beams (7), and the distribution beams (9) are arranged on the Bailey beams (8).

7. The bridge support for ultra-long span bridges according to claim 5, characterized in that: The upper ends of the two outermost vertical rods (13) of the open-type load-bearing frame of the ultra-large span bridge are provided with figure-eight braces (131) and diagonal bracing tubes (132). The diagonal bracing tubes (132) are fixed to the outer support end of the figure-eight braces (131) facing upward, and the diagonal bracing tubes (132) extend outward toward the outer side of the open-type load-bearing frame of the ultra-large span bridge to share the load.

8. A construction method for an ultra-long span bridge support, used to construct the ultra-long span bridge support as described in any one of claims 5 to 7, characterized in that, include: Constructing an open-type load-bearing frame for a super-long span bridge: First, before the construction of the abutments (101) where the two piers (10) are located, install the first embedded part (11) and the second embedded part (12); then, after the construction of the piers (10) is completed, install vertical rods (13) on the two abutments (101) respectively, and fix the bottom of the vertical rods (13) to the first embedded part (11); then pre-assemble two horizontal diagonal bracing supports (14), and hoist the assembled horizontal diagonal bracing supports (14), fix the other end of the side horizontal rod (141) to the top of the vertical rod (13), and fix the other end of the diagonal rod (142) to the second embedded part (12); then horizontally hoist the middle horizontal rod (15), and fix the two ends of the middle horizontal rod (15) to the horizontal diagonal bracing supports (11) on both sides respectively. 4) Connect and keep the middle crossbar (15) flush with the side crossbars (141) on both sides; then horizontally hoist the upper connecting pipe (21) and the lower connecting pipe (22), fix one end of the upper connecting pipe (21) and the lower connecting pipe (22) to the vertical bar (13), and connect the other end to one horizontal end of the upper four-way pipe (143) and the lower four-way pipe (144) respectively; then horizontally hoist the upper chord (231) and the lower chord (232), connect the two ends of the upper chord (231) to the other horizontal end of the upper four-way pipe (143) on both sides respectively, and connect the two ends of the lower chord (232) to the other horizontal end of the lower four-way pipe (144) on both sides respectively; finally, hoist several tie rod assemblies (233) between the upper chord (231) and the lower chord (232). Repeat the above steps to build at least two of the above-mentioned ultra-large span bridge open-type load-bearing frames, and connect two adjacent ultra-large span bridge open-type load-bearing frames with several connecting rods (4); A support structure is erected on the open-type load-bearing frame of the ultra-long span bridge.

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