Supporting structure for construction of municipal overpass steel net rack

Abstract

The present disclosure provides a supporting structure for municipal overpass steel net rack construction, belonging to the technical field of bridge construction. The supporting structure for municipal overpass steel net rack construction comprises a support frame assembly, a Bailey beam assembly and a disc buckle frame assembly; wherein the support frame assembly is detachably arranged at the top of the foundation, the Bailey beam assembly is arranged at the top of the support frame assembly, and the disc buckle frame assembly is detachably arranged at the top of the Bailey beam assembly; the Bailey beam assembly is provided with a falling prevention assembly. The supporting structure for municipal overpass steel net rack construction adopts modular assembly, realizes multi-layer collaborative operation, reduces the interference to traffic, improves the efficiency of steel net rack construction, and improves the safety of construction.

Description

Technical Field

[0001] This disclosure relates to the field of bridge construction technology, and in particular to a support structure for the construction of a steel space frame for a municipal overpass. Background Technology

[0002] Steel space frame structures for bridges, especially large-span, irregularly curved (such as spiral or arched) space frames used in urban overpasses, are widely used due to their aesthetic appeal and high structural efficiency. However, their installation and construction primarily rely on traditional full-span scaffolding.

[0003] However, traditional full-span scaffolding needs to be erected from the ground to the bridge. When the construction area is above the main urban road, the road needs to be closed for a long time for scaffolding erection and construction, which affects urban traffic. At the same time, traditional full-span scaffolding can usually only provide a single working level and cannot realize the parallel operation of multiple processes, resulting in low efficiency of steel space frame construction. Moreover, when facing construction scenarios with ultra-long spans, the stability is poor and there are significant safety risks.

[0004] To address the above issues, a support structure for the construction of a steel grid structure for municipal overpasses was designed. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a support structure for the construction of steel space frame for municipal overpasses, enabling multi-level collaborative operations, reducing traffic interference, and improving the construction efficiency and safety of steel space frame.

[0006] To achieve the aforementioned objectives of this utility model, the present disclosure adopts the following technical solution: A support structure for the construction of a steel space frame for a municipal overpass includes a support frame assembly, a Bailey beam assembly, and a disc-lock frame assembly. The support frame assembly is detachably mounted on the top of the foundation, the Bailey beam assembly is mounted on the top of the support frame assembly, and the disc buckle frame assembly is detachably mounted on the top of the Bailey beam assembly. The Bailey beam assembly is equipped with a fall arrestor.

[0007] In one exemplary embodiment of this disclosure, the support frame assembly includes a plurality of columns; The column is provided with a main crossbeam extending laterally along the bridge, and the Bailey beam assembly is provided at the top of the main crossbeam; The spacing between the multiple columns arranged longitudinally along the bridge is greater than the spacing between the multiple columns arranged transversely along the bridge. Scissor bracing is installed between two adjacent columns arranged laterally along the bridge.

[0008] In one exemplary embodiment of this disclosure, the Bailey beam assembly includes: Bailey beams, a plurality of said Bailey beams are spaced apart at the top of said support frame assembly, said Bailey beams extend longitudinally along the bridge, and said top of said Bailey beams are spaced apart at the top of said Bailey beams along the longitudinal direction of the bridge; The Bailey beam is a truss assembled from at least two Bailey panels, and adjacent Bailey panels are connected by steel pipe fasteners. The distribution beam and the Bailey beam are connected by bolts.

[0009] In one exemplary embodiment of this disclosure, the Bailey sheet is a Type 321 standard Bailey sheet.

[0010] In one exemplary embodiment of this disclosure, the disc buckle frame assembly includes: The disc-lock scaffolding is located at the top of the distribution beam, and the top of the distribution beam is located inside the bottom support of the disc-lock scaffolding. The disc-lock scaffolding has a load-bearing beam extending laterally along the bridge inside its top support, and a scaffold board is installed on the top of the load-bearing beam.

[0011] In one exemplary embodiment of this disclosure, protective railings are provided at the top of each of the four sides of the scaffold plank, and safety nets are installed on the protective railings.

[0012] In one exemplary embodiment of this disclosure, the distance between the scaffold plank and the grid structure component is no greater than 1.5 meters.

[0013] In one exemplary embodiment of this disclosure, the fall protection component includes: A fall arresting net is detachably installed at the bottom of the Bailey beam assembly; The anti-collision canopy is configured to include a first anti-collision canopy and a second anti-collision canopy. The first anti-collision canopy is installed on the top of the Bailey beam assembly, and the second anti-collision canopy is installed at the bottom of the Bailey beam assembly; The second protective canopy is surrounded by railings on all four sides of its top.

[0014] In one exemplary embodiment of this disclosure, a Bailey bridge is provided between two adjacent columns arranged longitudinally along the bridge, the Bailey bridge extends laterally along the bridge, and the Bailey beam assembly is provided at the top of the Bailey bridge; The Bailey bridge is set on a precast concrete foundation.

[0015] In one exemplary embodiment of this disclosure, the foundation is a concrete foundation, a fixed support is pre-embedded on the foundation, and the column is connected to the fixed support by bolts.

[0016] The beneficial effects of this disclosure are: (1) In this disclosure, the support frame assembly and Bailey beam assembly span a large span across the urban arterial road, enabling vehicles to pass normally under the construction overpass without long-term road closure, thus reducing the interference of construction on traffic.

[0017] (2) The support structure in this disclosure consists of a support frame assembly, a Bailey beam assembly and a disc buckle frame assembly. The Bailey beam assembly is a pre-assembled standard Bailey beam, and the disc buckle frame assembly is a standardized component, realizing modular assembly and multi-layer collaborative operation. The support structure can be erected and dismantled quickly, which improves the efficiency of steel space frame construction.

[0018] (3) In this disclosure, double-layer bottom protection is achieved through anti-fall components to ensure the safety of vehicles and pedestrians passing under the construction overpass; guardrails are installed on the disc buckle frame components to reduce the risk of workers working at height; and a highly stable spatial grid structure is formed through the rigid connection between the support frame components, Bailey beam components and disc buckle frame components, which improves the overall stability of the ultra-long span work platform and is suitable for the installation of various irregular structure grids. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] Figure 1 This is a schematic diagram of the support structure used for the construction of a municipal overpass steel grid frame, according to one embodiment of the present disclosure. Figure 2 This is a side view of a support structure used for the construction of a municipal overpass steel grid structure, according to one embodiment of the present disclosure. Figure 3 This is a schematic diagram of the support frame assembly in one embodiment of the present disclosure; Figure 4 This is a schematic diagram of the structure of a Bailey beam assembly in one embodiment of the present disclosure; Figure 5 This is a schematic diagram of the structure of the disc buckle frame assembly in one embodiment of the present disclosure; Figure 6 This is a schematic diagram of the structure of a fall arrestor component in one embodiment of the present disclosure; Figure 7 This is a schematic diagram of the support structure used for the construction of a steel space frame for a municipal overpass, according to another embodiment of this disclosure. Figure 8 This is a schematic diagram showing the location of network architecture components in another embodiment of this disclosure.

[0021] Explanation of reference numerals in the attached figures: 1. Support frame assembly; 2. Bailey beam assembly; 3. Disc-lock scaffold assembly; 4. Foundation; 5. Fall arrestor assembly; 6. Column; 7. Main crossbeam; 8. Bailey beam; 9. Distribution beam; 10. Bailey panel; 11. Disc-lock scaffold; 12. Fall arrestor net; 13. First fall arrestor canopy; 14. Second fall arrestor canopy; 15. Fence; 16. Bailey frame; 17. Scissor bracing; 18. Grid structure components. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0023] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0024] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0025] This disclosure provides a support structure for the construction of a steel space frame for a municipal overpass. See also... Figure 1 , Figure 2 and Figure 7 It includes a support frame assembly 1, a Bailey beam assembly 2, and a disc buckle frame assembly 3; wherein, the support frame assembly 1 is detachably installed on the top of the foundation 4, the Bailey beam assembly 2 is installed on the top of the support frame assembly 1, and the disc buckle frame assembly 3 is detachably installed on the top of the Bailey beam assembly 2; a fall arrestor 5 is installed on the Bailey beam assembly 2.

[0026] In this embodiment, the supporting structure for the construction of the municipal overpass steel space frame consists of a support frame assembly 1, a Bailey beam assembly 2, a disc-lock frame assembly 3, a foundation 4, and a fall arrestor assembly 5. The support frame assembly 1 is detachably installed on the foundation 4, the Bailey beam assembly 2 is detachably installed on the top of the support frame assembly 1, and the disc-lock frame assembly 3 is detachably installed on the top of the Bailey beam assembly 2. The Bailey beam assembly 2 serves as the main load-bearing layer, and the disc-lock frame assembly 3 serves as the operating layer. The disc-lock frame assembly 3 is used to position and install the steel space frame. When the disc-lock frame assembly 3 is installed on the Bailey beam assembly 2, the lower components of the steel space frame can be hoisted simultaneously, achieving layered synchronous construction.

[0027] Compared to existing full-span scaffolding, the support structure for the construction of this municipal overpass steel space frame spans large urban arterial roads through support frame components and Bailey beam components, allowing vehicles to pass normally under the overpass without long-term road closures, thus reducing traffic disruption caused by construction. The support structure consists of support frame components, Bailey beam components, and modular frame components. The Bailey beam components are pre-assembled standard Bailey beams, and the modular frame components are standardized components, enabling modular assembly and multi-layer collaborative operation. The support structure can be assembled and disassembled quickly, improving the efficiency of steel space frame construction. Through the rigid connection between the support frame components, Bailey beam components, and modular frame components, a highly stable spatial grid structure is formed, improving the overall stability of the ultra-long span working platform and making it suitable for the installation of various irregular space frame structures.

[0028] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 3 The support frame assembly 1 includes multiple columns 6; a main crossbeam 7 extending laterally along the bridge is installed at the top of each column 6, and a Bailey beam assembly 2 is installed at the top of the main crossbeam 7; the spacing between the multiple columns 6 arranged longitudinally along the bridge is greater than the spacing between the multiple columns 6 arranged laterally along the bridge; scissor bracing 17 is installed between two adjacent columns 6 arranged laterally along the bridge. This allows for large-span support, improves the stability of the support frame assembly 1, and avoids affecting traffic.

[0029] In one example, multiple columns 6 are grouped in pairs, and scissor bracing 17 is provided between two adjacent columns 6 in the same group.

[0030] Optionally, the distance between two adjacent columns 6 in the same group is 2 meters.

[0031] Optionally, the spacing between two adjacent sets of columns 6 arranged along the longitudinal direction of the bridge is 4 to 5 meters.

[0032] Optionally, column 6 can be made of Φ630×9mm spiral steel pipe.

[0033] Optionally, the main crossbeam 7 is made of double-section HN400×200 steel, and the main crossbeam 7 is welded to the column 6.

[0034] Optionally, the scissor brace 17 is made of 12.6 channel steel.

[0035] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 4 The Bailey bridge assembly 2 includes: Bailey bridges 8, with multiple Bailey bridges 8 spaced apart at the top of the support frame assembly 1. The Bailey bridges 8 extend longitudinally along the bridge, and multiple distribution beams 9 are spaced apart at the top of the Bailey bridges 8 along the longitudinal direction of the bridge. Each Bailey bridge 8 is a truss assembled from at least two Bailey bridge sections 10, with adjacent Bailey bridge sections 10 connected by steel pipe fasteners. The distribution beams 9 are bolted to the Bailey bridges 8. This allows for large-span support, modular assembly of the support structure, and improved construction efficiency of the steel space frame.

[0036] In one example, the Bailey beam 8 is a truss assembled from two Bailey panels 10.

[0037] In another example, the Bailey beam 8 is a truss assembled from three Bailey panels 10.

[0038] In one example, multiple Bailey beams 8 comprise trusses assembled from two or three Bailey panels 10.

[0039] In one example, the number of Bailey beams 8 is 4 to 5.

[0040] Optionally, the spacing between two adjacent Bailey beams 8 is 0.9 meters.

[0041] Optionally, the Bailey beam 8 is welded to the main crossbeam 7.

[0042] Optionally, the distribution beam 9 is an I10 I-beam, the spacing between two adjacent distribution beams 9 is 0.9 meters, and the distribution beam 9 is fixedly connected to the Bailey beam 8 by U-bolts.

[0043] Optionally, the steel pipe fastener is made of Φ48mm steel pipe.

[0044] In one embodiment of this disclosure, the Bailey bridge section 10 is a standard 321 type Bailey bridge section. This allows for rapid assembly of the Bailey bridge beam 8, improving the efficiency of steel space frame construction.

[0045] In one embodiment of this disclosure, the Bailey beam 8 is lifted as a whole using a truck crane.

[0046] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 5 The disc-lock scaffold assembly 3 includes a disc-lock type scaffold 11, located at the top of the distribution beam 9, with the top of the distribution beam 9 situated within the bottom support of the disc-lock type scaffold 11. A load-bearing beam extending laterally along the bridge is installed within the top support of the disc-lock type scaffold 11, and scaffold boards are mounted on the top of the load-bearing beam. This allows the disc-lock type scaffold 11 to function as both a support layer and an operating layer, enabling modular assembly of the supporting structure and facilitating the construction of the steel space frame.

[0047] Optionally, the base is welded to the distribution beam 9.

[0048] Optionally, the top support is an adjustable support, and the cantilever length of the top support is no more than 500mm.

[0049] Optionally, the load-bearing beam is an 80×80×3.5mm square steel tube.

[0050] In one example, square steel tubes can be doubled to increase the strength of the load-bearing beam.

[0051] In one example, the disc-lock scaffold 11 is a φ48.3×3.2mm disc-lock bracket. The lower horizontal bar spacing of the disc-lock scaffold 11 is 1.5 meters, the top horizontal bar spacing of the disc-lock scaffold 11 is 1 meter, and vertical diagonal bars are provided around the disc-lock scaffold 11 and in each span inside.

[0052] Optionally, horizontal steel pipe scissor bracing is provided every four spans within the disc-lock scaffold 11.

[0053] In one embodiment of this disclosure, the steel space frame includes a large-span area and a bird-watching area. The vertical and horizontal spacing of the uprights of the disc-lock scaffold 11 located in the large-span area is 0.9m × 0.9m, and the vertical and horizontal spacing of the uprights of the disc-lock scaffold 11 located in the bird-watching area is 1.2m × 1.2m.

[0054] In one embodiment of this disclosure, when the steel grid is located above the bridge deck, pressure plates are arranged on the surface of the bridge deck, and the disc-lock scaffold 11 is erected on the pressure plates.

[0055] Optionally, the pressure plates are arranged in a quincunx pattern, with the distance between adjacent pressure plates not exceeding 6 meters.

[0056] Optionally, the disc-lock scaffold 11 located above the bridge deck is equipped with cable stays.

[0057] In one embodiment of this disclosure, guardrails are installed at the top of each of the four sides of the scaffold planks, and safety nets are mounted on the guardrails. This improves worker safety and reduces the risks associated with working at heights.

[0058] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 8 The distance between the scaffold planks and the grid structure component 18 shall not exceed 1.5 meters. This facilitates construction for workers.

[0059] Optionally, the height of the guardrail is 1.5 meters.

[0060] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 6The fall arrestor 5 includes: a fall arrestor net 12, detachably mounted at the bottom of the Bailey bridge assembly 2; and a crash protection canopy, configured to include a first crash protection canopy 13 and a second crash protection canopy 14; wherein the first crash protection canopy 13 is located at the top of the Bailey bridge assembly 2, and the second crash protection canopy 14 is located at the bottom of the Bailey bridge assembly 2; and railings 15 are installed around the top of the second crash protection canopy 14. This provides double-layered bottom protection, ensuring the safety of vehicles and pedestrians passing under the construction overpass.

[0061] Optionally, the bottom end of the Bailey beam assembly 2 is provided with multiple rectangular tube brackets at intervals, and the fall protection net 12 is installed on the rectangular tube brackets.

[0062] Optionally, the cross-section of the first anti-collision canopy 13 is wavy, and the cross-section of the second anti-collision canopy 14 is a continuous concave shape.

[0063] Optionally, the first anti-collision canopy 13 is made of corrugated steel sheet, and the second anti-collision canopy 14 is made of galvanized steel sheet.

[0064] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 A Bailey bridge 16 is installed between two adjacent columns 6 arranged longitudinally along the bridge. The Bailey bridge 16 extends laterally along the bridge, and the Bailey beam assembly 2 is installed at the top of the Bailey bridge 16. The Bailey bridge 16 is set on a precast concrete foundation. In this way, the strength and stability of the Bailey beam assembly 2 can be improved, and the overall stability of the ultra-long span working platform can be improved.

[0065] It is understandable that when the span of the working platform is too long, a Bailey bridge 16 is arranged between two adjacent sets of columns 6 arranged longitudinally along the bridge to provide secondary support for the Bailey beam assembly 2 and reduce the interference to traffic.

[0066] In one embodiment of this disclosure, the foundation 4 is a concrete foundation, and a fixed bracket is pre-embedded in the foundation 4. The column 6 is connected to the fixed bracket by bolts. This allows for convenient assembly and disassembly of the column 6 and improves the stability of the column 6 support.

[0067] In one example, when foundation 4 is located in a road area, foundation 4 adopts a precast strip concrete foundation (C30) with M16 expansion bolts embedded inside to fix the bracket.

[0068] In one example, when the foundation 4 is located in an unhardened area, the foundation 4 adopts a cast-in-place concrete foundation (C30), with a two-way steel mesh (Φ14@200) at the bottom and unidirectional reinforcement at the top, and M16 expansion bolts are pre-embedded inside to fix the bracket.

[0069] In one embodiment of this disclosure, when the foundation 4 is located below the birdwatching area, the foundation 4 is constructed using a 15cm thick C20 concrete cushion layer.

[0070] Optionally, the foundation 4 extends 50cm beyond the range of the disc-lock scaffold 11 on each side.

[0071] Optionally, a drainage ditch is provided around the foundation 4.

[0072] In one embodiment of this disclosure, a reflective film is affixed to the surface of the post 6, and warning paint is applied. This provides a warning to pedestrians and vehicles, improving their safety.

[0073] Optionally, a strobe light is installed on column 6.

[0074] In one embodiment of this disclosure, settlement observation points are respectively set on the column 6 and the disc-lock scaffold 11.

[0075] In one embodiment of this disclosure, see Figures 1 to 8 The working process of the supporting structure used in the construction of the steel space frame of this municipal overpass is briefly described as follows: Step 1: Foundation construction; The area where the operating platform is to be erected shall be leveled, compacted, and drained. For road areas, precast strip C30 concrete foundations are used, with M16 expansion bolts embedded in the foundations to fix the brackets. For unhardened areas, cast-in-place C30 concrete foundations are used; For the birdwatching platform area, a cast-in-place C20 concrete subbase is used.

[0076] Step Two: Establishment of Support System; Install columns 6 on the precast strip C30 concrete foundation, weld the main crossbeam 7 to the top of the column 6, then assemble the Bailey panels 10 into Bailey beam 8, use a truck crane to lift the assembled Bailey beam 8 onto the main crossbeam 7, and then lift the distribution beam 9 onto the Bailey beam 8. A horizontal fall protection net 12 is hung at the bottom of Bailey beam 8, and a first fall protection canopy 13 is installed at the top of Bailey beam 8, and a second fall protection canopy 14 is installed at the bottom of Bailey beam 8.

[0077] Step 3: Setting up the operating platform; In the long-span area, a disc-lock scaffold 11 is erected at the top of the distribution beam 9; In the birdwatching platform area, a disc-lock scaffold was erected directly on the concrete foundation. Install load-bearing beams on the top support of the disc-lock scaffold 11, and install metal scaffold boards on the load-bearing beams to form a working layer. The distance between the working layer and the grid structure component 18 shall not exceed 1.5 meters. Install 1.5m high guardrails and safety nets on the edge of the working layer.

[0078] Step 4: Collaborative work for space frame installation; A layered synchronous construction method was adopted, in which the disc-lock scaffolding 11 was erected at the top of the distribution beam 9, and the lower grid structure components 18 were hoisted at the same time. During the welding and installation of the lower grid structure component 18, the upper grid structure component 18 can be positioned synchronously on the working layer.

[0079] Step 5: Demolition Process; After the network architecture component 18 is installed, a top-down, layered removal sequence is adopted; First, remove the scaffold boards and load-bearing beams, then remove the disc-lock scaffold 11. The removal sequence is horizontal bar-diagonal bar-vertical bar. Then, remove the distribution beam 9 and Bailey beam 8 in sequence, and finally remove the main horizontal beam 7 and column 6.

[0080] In one embodiment of this disclosure, when the uprights of the disc-lock scaffold 11 conflict with the grid structure component 18, I-beams are used to stagger and overlap the upper disc-lock scaffold 11.

[0081] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A support structure for the construction of a steel space frame for a municipal overpass, characterized in that, Includes support frame assembly (1), Bailey beam assembly (2) and disc buckle frame assembly (3); The support frame assembly (1) is detachably mounted on the top of the foundation (4), the Bailey beam assembly (2) is mounted on the top of the support frame assembly (1), and the disc buckle assembly (3) is detachably mounted on the top of the Bailey beam assembly (2). The Bailey beam assembly (2) is equipped with a fall arrestor assembly (5).

2. The support structure for the construction of the steel space frame of a municipal overpass according to claim 1, characterized in that, The support frame assembly (1) includes multiple columns (6); The column (6) is provided with a main crossbeam (7) extending laterally along the bridge at its top, and the Bailey beam assembly (2) is provided at the top of the main crossbeam (7); The spacing between the multiple columns (6) arranged longitudinally along the bridge is greater than the spacing between the multiple columns (6) arranged transversely along the bridge. A scissor brace (17) is provided between two adjacent columns (6) arranged laterally along the bridge.

3. The supporting structure for the construction of the steel space frame of a municipal overpass according to claim 1, characterized in that, The Bailey beam assembly (2) includes: Bailey beams (8), a plurality of Bailey beams (8) are spaced apart at the top of the support frame assembly (1), the Bailey beams (8) extend longitudinally along the bridge, and a plurality of distribution beams (9) are spaced apart at the top of the Bailey beams (8) along the longitudinal direction of the bridge. The Bailey beam (8) is a truss assembled from at least two Bailey panels (10), and adjacent Bailey panels (10) are connected by steel pipe fasteners. The distribution beam (9) and the Bailey beam (8) are connected by bolts.

4. The supporting structure for the construction of the steel space frame of a municipal overpass according to claim 3, characterized in that, The Bailey sheet (10) is a 321 standard Bailey sheet.

5. The support structure for the construction of the steel space frame of a municipal overpass according to claim 3, characterized in that, The disc buckle frame assembly (3) includes: The disc-lock scaffold (11) is located at the top of the distribution beam (9), and the top of the distribution beam (9) is located inside the bottom support of the disc-lock scaffold (11); The disc-lock scaffold (11) has a load-bearing beam extending laterally along the bridge inside its top support, and a scaffold board is installed on the top of the load-bearing beam.

6. The supporting structure for the construction of a municipal overpass steel grid structure according to claim 5, characterized in that, The top of each of the four sides of the scaffold plank is equipped with a guardrail, and a safety net is installed on the guardrail.

7. The supporting structure for the construction of a municipal overpass steel grid structure according to claim 5, characterized in that, The distance between the scaffold plank and the grid structure component (18) shall not exceed 1.5 meters.

8. The supporting structure for the construction of the steel space frame of a municipal overpass according to claim 1, characterized in that, The fall protection component (5) includes: A fall arresting net (12) is detachably installed at the bottom of the Bailey beam assembly (2); The anti-smashing canopy is configured to include a first anti-smashing canopy (13) and a second anti-smashing canopy (14). The first anti-smashing canopy (13) is located on the top of the Bailey beam assembly (2), and the second anti-smashing canopy (14) is located at the bottom of the Bailey beam assembly (2). The second anti-smashing shed (14) is surrounded by fences (15) on all four sides of its top.

9. The supporting structure for the construction of a municipal overpass steel grid structure according to claim 2, characterized in that, A Bailey bridge (16) is provided between two adjacent columns (6) arranged longitudinally along the bridge. The Bailey bridge (16) extends laterally along the bridge. The Bailey beam assembly (2) is located at the top of the Bailey bridge (16). The Bailey bridge (16) is set on a precast concrete foundation.

10. The support structure for the construction of a municipal overpass steel grid structure according to claim 2, characterized in that, The foundation (4) is a concrete foundation, and a fixed support is pre-embedded on the foundation (4). The column (6) is connected to the fixed support by bolts.

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