Support system of protective platform on bailey beam and large-span cast beam plate cover structure

Abstract

The utility model relates to the field of building construction technology provides a kind of protection platform on bailey beam and the support system of large-span pouring beam slab cover structure, the protection platform on bailey beam includes multiple cantilever rods, walking board and multiple balustrade vertical rods, one end of cantilever rod is used to connect with bailey beam, the other end extends to bailey beam outside, multiple cantilever rods are interval arranged along the extension direction of bailey beam;Walking board is laid on cantilever rod;Every balustrade vertical rod is set corresponding one cantilever rod, one end of balustrade vertical rod is connected with the end of cantilever rod away from bailey beam, and balustrade vertical rod extends upward and is set, and balustrade vertical rod is used to install guardrail.The protection platform of bailey beam of the utility model, by cantilever rod and bailey beam connection form support structure, realize safety protection in combination with walking board and balustrade vertical rod, solved the problem that traditional bailey beam edge protection is difficult to install, with the advantages of improving aerial work safety, installation is convenient and the protection effect is reliable.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a protective platform on Bailey beams and a support system for large-span cast-in-place beam-slab structures. Background Technology

[0002] Bailey bridges are widely used as formwork systems in bridge construction. However, traditional edge protection measures are difficult to apply to Bailey bridge structures, leading to serious safety hazards for workers operating at heights. Due to the unique structural form of Bailey bridges, conventional guardrails cannot be directly installed and fixed, forcing workers to work without protection, greatly increasing the risk of falls. Furthermore, existing work platforms often cannot be effectively connected to Bailey bridges, forcing workers to walk or crawl directly on them, which is not only inconvenient but also increases operational risks. This safety hazard is particularly pronounced in the construction of large-span cast-in-place beam-slab-cover structures. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a protective platform for Bailey bridges, which has the advantages of improving the safety of high-altitude operations, achieving reliable connection with Bailey bridges, and being easy to install.

[0004] This utility model also proposes a support system for a large-span cast-in-place beam-slab cover structure.

[0005] The protective platform on the Bailey beam according to the first aspect of the present invention includes: Multiple cantilever rods, one end of which is used to connect to the Bailey beam and the other end extends outward from the Bailey beam, and the multiple cantilever rods are spaced apart along the extension direction of the Bailey beam; A walking board, which is laid on the cantilever pole; Multiple railing posts are provided, each corresponding to a cantilever beam. One end of each railing post is connected to the end of the cantilever beam away from the Bailey beam. The railing posts extend upwards and are used to install guardrails.

[0006] According to the embodiments of this utility model, the protective platform on the Bailey beam is connected to the Bailey beam through cantilever rods to form a support structure. Combined with the walkway and railing posts, it achieves safety protection, which solves the problem of difficult installation of traditional Bailey beam edge protection. It has the advantages of improving the safety of high-altitude operations, convenient installation and reliable protection effect.

[0007] According to one embodiment of the present invention, the railing uprights and the cantilever poles are detachably connected.

[0008] According to one embodiment of the present invention, one end of the railing upright is provided with a limiting buckle, the limiting buckle has a slot, and one end of the cantilever rod is accommodated and limited within the slot.

[0009] According to one embodiment of the present invention, the inner wall of the slot is provided with at least one first limiting surface, and the outer wall of the cantilever rod is provided with at least one second limiting surface. The first limiting surface abuts against the second limiting surface to restrict the rotation of the railing post relative to the cantilever rod.

[0010] According to one embodiment of the present invention, a first fixing hole is provided at the end of the cantilever rod away from the Bailey beam, and a second fixing hole is provided at the end of the limiting buckle. The connecting piece passes through the first fixing hole and the second fixing hole in sequence to connect the cantilever rod and the limiting buckle.

[0011] According to one embodiment of the present invention, the axes of the first fixing hole and the second fixing hole are in the horizontal direction.

[0012] According to one embodiment of the present invention, the cantilever rod is detachably connected to the Bailey beam.

[0013] According to one embodiment of the present invention, the protective platform on the Bailey beam includes multiple fixing components, each fixing component corresponding to one cantilever rod, and the fixing component includes: The first limiting plate is disposed between the upper surface of the cantilever rod and the upper chord of the Bailey beam; The second limiting plate is disposed on the lower surface of the upper chord of the Bailey beam; Fasteners that pass through and connect the cantilever rod, the first limiting plate, and the second limiting plate.

[0014] According to one embodiment of the present invention, multiple walking slabs are laid on the multiple cantilever poles, and a splicing seam is formed between two adjacent walking slabs. The splicing seam is used to install an installation clamp, which includes: A third limiting plate is disposed on the upper surface of the walking board and abuts against at least two of the walking boards; A fourth limiting plate is disposed on the lower surface of the walking board and abuts against at least two of the walking boards; A locking element is provided through the splice seam to connect the third limiting plate and the fourth limiting plate.

[0015] The support system for the large-span cast-in-place beam-slab cover structure according to the second aspect of this utility model includes: A number of columns, arranged in an array; A plurality of supporting brackets are provided on a plurality of columns, and at least some of the columns are provided with the supporting brackets; A plurality of main beams are arranged at intervals along a first direction. The main beams overlap the supporting brackets. Each main beam includes two main Bailey beams arranged in parallel. The two main Bailey beams are respectively located on opposite sides of the same column. A plurality of secondary beams are arranged at intervals along a second direction, which is perpendicular to the first direction. The secondary beams overlap the main beam, and the plurality of secondary beams are used to jointly support the box girder formwork. The aforementioned protective platform on the Bailey beam is connected to the secondary beam.

[0016] The support system of the large-span cast-in-place beam-slab cover structure according to the embodiment of this utility model includes the protective platform on the Bailey beam, and therefore has all the technical effects of the protective platform on the Bailey beam, which will not be repeated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the protective platform on the Bailey beam provided in this embodiment of the utility model, installed on the Bailey beam.

[0020] Figure 2 This is one of the partial structural schematic diagrams of the protective platform on the Bailey beam provided in this embodiment of the utility model.

[0021] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is the second partial structural schematic diagram of the protective platform on the Bailey beam provided in this embodiment of the utility model.

[0023] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle.

[0024] Figure 6This is a partial enlarged view of the joint of the walking board in the protective platform on the Bailey beam provided in this embodiment of the utility model.

[0025] Figure 7 This is a schematic diagram of the support system for the large-span cast-in-place beam-slab cover structure provided in this embodiment of the utility model.

[0026] Figure label: 100. Support bracket; 200. Column; 300. Main beam; 400. Secondary beam; 600. Protective platform on Bailey beam; 60. Bailey beam; 61. Cantilever rod; 611. First fixing hole; 62. Walking board; 621. Splice joint; 63. Guardrail post; 631. Limit buckle; 6311. Slot; 6312. Second fixing hole; 64. Fixing component; 641. First limit plate; 642. Second limit plate; 643. Fastener; 65. Installation clamp; 651. Third limit plate; 652. Fourth limit plate; 653. Locking component. Detailed Implementation

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0028] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0030] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] In existing technologies, Bailey bridge 60 systems are widely used as formwork systems in bridge construction due to their modular structure, which facilitates rapid assembly. However, traditional Bailey bridge 60 systems lack edge protection, requiring workers to stand or climb directly on the bridge surface when working at heights, posing a risk of fall. Furthermore, the large spacing between Bailey bridge 60 sections and the lack of continuous support surfaces make it difficult for workers to move tools and materials stably, limiting operational efficiency.

[0033] Therefore, please refer to the following: Figure 1 and Figure 2 This application proposes a protective platform 600 on a Bailey bridge, comprising: multiple cantilever poles 61, one end of which is connected to the Bailey bridge 60, and the other end extending outward from the Bailey bridge 60; the multiple cantilever poles 61 are spaced apart along the extension direction of the Bailey bridge 60; a walking board 62, which is laid on the cantilever poles 61; and multiple guardrail posts 63, each guardrail post 63 corresponding to one cantilever pole 61, one end of which is connected to the end of the cantilever pole 61 away from the Bailey bridge 60; the guardrail posts 63 extend upward and are used to install guardrails.

[0034] The cantilever pole 61 refers to a laterally extending support component, which can be made of channel steel or I-beams. It is fixed to the upper chord of the Bailey beam 60 by bolts or welding and is used to support the pedestrian walkway 62 and personnel loads. The pedestrian walkway 62 refers to a planar component laid on the cantilever pole 61, which can be made of anti-slip steel plate or grating. It is fixed by clips or bolts to form a continuous working surface, solving the problem of unstable standing for personnel. The guardrail post 63 refers to a vertically installed support column, which can be made of round or square tubes. Its bottom end is connected to the end of the cantilever pole 61 by a flange or plug-in structure, and the top end has reserved holes for fixing the horizontal guardrail to form a fall prevention barrier.

[0035] Specifically, the cantilever poles 61 are arranged at fixed intervals along the length of the Bailey beam 60, and the inner end of each cantilever pole 61 is locked to the upper chord of the Bailey beam 60 by clamps. The walkway 62 is laid laterally between adjacent cantilever poles 61, and the edge of the slab has a folded edge structure that engages with the grooves in the cantilever poles 61 to prevent displacement. Optionally, through holes are provided at intervals at the top of the uprights for horizontal guardrails to be inserted. When workers stand on the walkway 62 to work, their center of gravity is distributed across multiple cantilever poles 61, and the guardrail system prevents personnel from approaching the dangerous edge area.

[0036] Through the above technical solution, this application constructs a working platform that is installed synchronously with the Bailey beam 60. Workers can move safely on the flat walking platform 62, and the guardrail system effectively prevents tools from falling and personnel from slipping. The spaced arrangement of the cantilever beams 61 avoids overloading local nodes of the Bailey beam 60, ensuring the overall structural stability.

[0037] This application further proposes that the railing uprights 63 and the cantilever poles 61 be detachably connected.

[0038] Detachable connection refers to the assembly of two components through non-permanent fixing, specifically using bolted connections or plug-in structures. This connection method allows the railing uprights 63 and cantilevered posts 61 to be repeatedly disassembled and reassembled during construction without damaging the components themselves. Modular assembly refers to decomposing the protective platform into independent functional units, such as the cantilevered posts 61 and railing uprights 63 as independent modules, which can be quickly assembled through standardized interfaces.

[0039] Specifically, the guardrail uprights 63 are connected to the ends of the cantilever poles 61 via bolts or pins, with matching mounting holes or slots 6311 at the connection points. During construction, the cantilever poles 61 are pre-fixed to the Bailey beams 60, while the guardrail uprights 63 are installed at positions selected according to the needs of the work area. When it is necessary to adjust the protection range or remove part of the platform, the guardrail uprights 63 can be separated simply by loosening the connectors, leaving the cantilever poles 61 as the supporting structure. This method avoids material damage caused by welding and allows the protective facilities to be dynamically adjusted during the construction phase.

[0040] Through the above technical solution, this application achieves rapid assembly and disassembly of the protective platform components, enabling construction personnel to dynamically adjust the protection range according to the work progress, thus reducing the safety risks of high-altitude disassembly operations. The detachable connection structure also facilitates the individual replacement of damaged parts, reducing maintenance costs. At the same time, the modular design allows the protective platform to be adapted to Bailey beam 60 support systems with different spans.

[0041] Please refer to the reference. Figure 2 and Figure 3 This application further proposes that one end of the railing post 63 is provided with a limiting buckle 631, the limiting buckle 631 is provided with a slot 6311, and one end of the cantilever post 61 is accommodated and limited in the slot 6311.

[0042] The limiting buckle 631 refers to the metal component installed at the end of the railing upright 63, which can be fixed by welding or bolts. Its function is to provide circumferential restraint to the cantilever rod 61 through the slot 6311 structure. The slot 6311 refers to the concave space formed inside the limiting buckle 631, which can be processed by stamping or casting. Its size matches the shape of the end of the cantilever rod 61 to limit the horizontal displacement of the cantilever rod 61.

[0043] Specifically, after the end of the cantilever pole 61 is inserted into the slot 6311, the inner wall of the slot 6311 forms surface contact with the outer surface of the cantilever pole 61. Since the opening direction of the slot 6311 is perpendicular to the extension direction of the cantilever pole 61, the cantilever pole 61 cannot be dislodged from the slot 6311 when subjected to lateral force. The side wall of the limiting buckle 631 further wraps around the side of the cantilever pole 61, forming a three-dimensional constraint to prevent the railing post 63 from rotating around the axis of the cantilever pole 61. During installation, the cantilever pole 61 is simply aligned with the slot 6311 and inserted to complete the initial positioning, followed by final fixation using connectors.

[0044] Through the above technical solution, this application effectively prevents relative rotation and axial slippage between the guardrail upright 63 and the cantilever 61, ensuring the structural stability of the protective platform when personnel walk or equipment vibrates. At the same time, it simplifies the on-site assembly process, allowing operators to complete rapid installation without special tools, thus reducing the safety risks of working at heights.

[0045] This application further proposes that the inner wall of the slot 6311 is provided with at least one first limiting surface, and the outer wall of the cantilever rod 61 is provided with at least one second limiting surface, with the first limiting surface abutting against the second limiting surface to restrict the rotation of the railing upright 63 relative to the cantilever rod 61.

[0046] The first limiting surface refers to the planar structure formed by the inner wall of the slot 6311, which can be realized by using a rectangular or trapezoidal cross-section, increasing the contact area with the cantilever rod 61 through planar contact. The second limiting surface refers to the corresponding planar structure formed by the outer wall of the cantilever rod 61, which can be realized by using a processing method that matches the shape of the first limiting surface, forming mechanical interference through geometric fit.

[0047] Specifically, when the cantilever rod 61 is inserted into the slot 6311, the first limiting surface and the second limiting surface form a rigid constraint through planar contact. This surface contact method can resist the rotational torque generated by the railing upright 63 around the axis of the cantilever rod 61. Due to the increased contact area, compared with point contact or line contact, this structure is less prone to relative slippage under dynamic loads. At the same time, the geometric fit of the limiting surfaces does not require additional fixing devices; rotational degrees of freedom can be eliminated simply by shape matching, thereby improving structural stability while maintaining a detachable connection.

[0048] Through the above technical solution, this application can effectively prevent relative rotation between the guardrail upright 63 and the cantilever 61, ensure the structural stability of the protective platform under personnel operation or external load, and maintain the convenience of detachable connection.

[0049] like Figure 3 As shown, this application further proposes that the end of the cantilever rod 61 away from the Bailey beam 60 is provided with a first fixing hole 611, and the limit buckle 631 is provided with a second fixing hole 6312. The connector (not shown) passes through the first fixing hole 611 and the second fixing hole 6312 in sequence to connect the cantilever rod 61 and the limit buckle 631.

[0050] The first fixing hole 611 refers to a through hole or threaded hole located at the end of the cantilever rod 61, which can be achieved by drilling or stamping. It is used to form an alignment connection with the second fixing hole 6312 on the limit buckle 631. The second fixing hole 6312 refers to a through hole or threaded hole located on the limit buckle 631, which can be achieved by a machining method that matches the first fixing hole 611. The alignment of the holes ensures that the connecting parts can pass through smoothly. The connecting parts refer to bolts, pins, or rivets used for mechanical fixing, which can be implemented using standard fasteners 643, forming a rigid connection through the through holes.

[0051] Specifically, the cantilever rod 61 and the limiting buckle 631 are aligned horizontally through the alignment of the first fixing hole 611 and the second fixing hole 6312. The connector is inserted into the hole horizontally, forming a rigid connection between the cantilever rod 61 and the limiting buckle 631 that resists shear force. The horizontal connection design effectively transmits the lateral load between the cantilever rod 61 and the railing post 63, preventing loosening of the connection due to vertical force. The detachable nature of the connector allows for quick disassembly and reassembly during installation or maintenance, while mechanical fixing ensures the stability of the connection node.

[0052] This application further proposes that the axes of the first fixing hole 611 and the second fixing hole 6312 are in the horizontal direction.

[0053] Specifically, when the connector horizontally passes through the first fixing hole 611 and the second fixing hole 6312, the axial direction of the connector is perpendicular to the direction of gravity. In this case, the connector mainly bears tensile loads along its axial direction, rather than shear loads perpendicular to the axial direction. Since the tensile strength of the bolt-type fastener 643 is significantly higher than its shear strength, this arrangement can fully utilize the mechanical properties of the connector. The horizontal axis direction forms a spatial orthogonal relationship with the extension direction of the cantilever rod 61, making the constraint direction of the connection structure perpendicular to the cantilever direction of the cantilever rod 61, thereby effectively limiting the torsional tendency of the end of the cantilever rod 61.

[0054] Through the above technical solution, this application effectively prevents the relative rotation or displacement of the connection between the cantilever pole 61 and the railing upright 63 under dynamic load, ensuring that the protective platform maintains structural stability during personnel walking and equipment handling, while simplifying the installation and calibration process of the connectors.

[0055] This application further proposes that the cantilever rod 61 and the Bailey beam 60 adopt a detachable connection structure.

[0056] The detachable connection refers to the temporary fixing and separation of the cantilever pole 61 and the Bailey beam 60 through a standardized interface, which can be achieved using bolt connections, snap-fit ​​structures, or pin connections. This connection method ensures load-bearing capacity while avoiding permanent damage to the Bailey beam 60's main structure.

[0057] Specifically, during installation, high-strength bolts are used to secure the connecting plate to the pre-drilled holes in the Bailey beam 60. During disassembly, the cantilever rod 61 can be separated simply by releasing the bolts. This connection method allows the cantilever rod 61 to be quickly installed or removed according to the needs of the construction phase, meeting the requirements for setting up temporary work platforms for the formwork system while avoiding heat-affected zone damage to the Bailey beam 60 material caused by traditional welding methods.

[0058] Through the above technical solution, this application achieves a non-destructive connection between the protective platform and the Bailey beam 60-support formwork system, enabling the working platform to flexibly adjust its installation position according to the construction progress and reducing the risk of high-altitude cutting operations.

[0059] Please refer to the reference. Figure 4 and Figure 5 This application further proposes that the protective platform 600 on the Bailey beam includes multiple fixing components 64, each fixing component 64 corresponding to a cantilever rod 61. The fixing component 64 includes a first limiting plate 641, a second limiting plate 642, and a fastener 643. The first limiting plate 641 is located between the cantilever rod 61 and the upper surface of the upper chord of the Bailey beam 60; the second limiting plate 642 is located on the lower surface of the upper chord of the Bailey beam 60; and the fastener 643 passes through and connects the cantilever rod 61, the first limiting plate 641, and the second limiting plate 642.

[0060] The first limiting plate 641 refers to the plate material disposed between the contact surfaces of the cantilever rod 61 and the upper chord of the Bailey beam 60. It can be made of steel or aluminum alloy. Its planar contact characteristics eliminate the installation gap between the cantilever rod 61 and the Bailey beam 60, and the installation height of the cantilever rod 61 can be adjusted by the thickness of the plate. The second limiting plate 642 refers to the plate material disposed at the bottom of the upper chord of the Bailey beam 60. It can be made of the same metal plate as the first limiting plate 641. It forms an upper and lower clamping structure with the first limiting plate 641, wrapping around the chord of the Bailey beam 60 to limit the horizontal displacement of the cantilever rod 61. The fastener 643 is the connecting component that passes through the cantilever rod 61 and the upper and lower limiting plates. It can be made of bolts or pins. By applying preload, it clamps and fixes the cantilever rod 61 and the chord of the Bailey beam 60, forming a rigid connection with three points of force.

[0061] Through the above technical solution, this application solves the problem of insufficient connection stability between the cantilever rod 61 and the Bailey beam 60. The three-point clamping structure resists both vertical load and horizontal slippage, preventing the cantilever rod 61 from loosening when personnel walk or equipment is placed. The combined installation method of the upper and lower limit plates and the locking parts 653 does not require damage to the Bailey beam 60 structure, making disassembly and maintenance convenient. The thickness of the limit plates can be flexibly adjusted to adapt to the installation requirements of Bailey beams 60 of different specifications.

[0062] Please refer to the reference. Figure 1 and Figure 6This application further proposes that multiple cantilever poles 61 are covered with multiple walking slabs 62, and a splicing seam 621 is formed between two adjacent walking slabs 62. The splicing seam 621 is used to install an installation clamp 65, which includes a third limiting plate 651, a fourth limiting plate 652, and a locking member 653. The third limiting plate 651 is disposed on the upper surface of the walking slab 62 and abuts against at least two walking slabs 62, the fourth limiting plate 652 is disposed on the lower surface of the walking slab 62 and abuts against at least two walking slabs 62, and the locking member 653 passes through the splicing seam 621 to connect the third limiting plate 651 and the fourth limiting plate 652.

[0063] The splicing seam 621 refers to the gap formed between the edges of adjacent walking slabs 62, which can be achieved by controlling the laying spacing of the walking slabs 62. This gap provides assembly space for the installation clamp 65. The installation clamp 65 is a device that fixes the walking slabs 62 by mechanical clamping. It can be a combination structure of metal sheet and fastening bolts, used to eliminate structural loosening caused by the splicing seam 621. The third limiting plate 651 is a clamping component covering the upper surface of the walking slab 62. It can be a steel plate with folded edges, whose folded edges fit against the side of the walking slab 62 to achieve horizontal limiting. The fourth limiting plate 652 is a supporting component set on the lower surface of the walking slab 62. It can be a steel plate structure symmetrical to the third limiting plate 651, forming bidirectional constraint through upper and lower clamping. The locking element 653 is a fastening element that penetrates the splicing seam 621. It can be a bolt assembly with nuts, which generates clamping force by tightening to fix the limiting plate.

[0064] Specifically, when the walkway 62 is laid on the cantilever pole 61, a longitudinally extending splice seam 621 is naturally formed between adjacent walkway 62s. The third limiting plate 651 of the mounting clamp 65 spans over the splice seam 621, and its folded edges press against the upper surface edges of the two walkway 62s respectively to prevent the walkway 62s from sliding laterally. The fourth limiting plate 652 is simultaneously installed on the lower surface of the walkway 62, and forms an upper and lower linkage clamp with the third limiting plate 651 through the locking member 653. When the locking member 653 passes through the splice seam 621 and is tightened, the third limiting plate 651 and the fourth limiting plate 652 generate opposing forces, pressing the two walkway 62s tightly together. This clamping force acts on the upper and lower surfaces of the walkway 62 at the same time, forming a three-dimensional constraint to prevent the walkway 62 from warping in the vertical direction or misaligning in the horizontal direction.

[0065] Through the above technical solution, this application effectively eliminates the risk of localized platform loosening caused by the splice seam 621 of the walkway 62, and achieves multi-directional constraint through mechanical clamping to ensure continuous stability of the working plane. This structure avoids complex processing of the walkway 62, simplifies the on-site installation process, and the clamps can be repeatedly disassembled and reassembled to adapt to the construction needs of Bailey beam 60 support systems with different spans.

[0066] likeFigure 7 As shown, this application further proposes a support system for a large-span cast-in-place beam-slab structure, including several columns 200 arranged in an array, supporting brackets 100 mounted on the columns 200, main beams 300 spaced apart along a first direction, secondary beams 400 spaced apart along a second direction, and a protective platform 600 on the Bailey beams. The main beams 300 include two parallel main Bailey beams 60, located on either side of the same column 200; the secondary beams 400 are vertically connected to the main beams 300 to support the box girder formwork; the protective platform is connected to the secondary beams 400.

[0067] The supporting bracket 100 refers to a local load-bearing structure installed on the column 200, which can be implemented using welded or bolted steel plates to enhance the load-bearing capacity at the nodes of the column 200. The main Bailey beam 60 refers to a truss beam assembled from standard Bailey panels, which can be implemented using pin or bolt connections, symmetrically distributed on both sides of the column 200 to balance the load. The secondary beam 400 refers to a supporting component arranged perpendicular to the main beam 300, which can be implemented using Bailey beams 60 or composite steel beams, distributing the load transfer path through a cross-grid structure. The protective platform refers to a working surface composed of cantilevered rods 61, a walking board 62, and guardrails, which can be fixed to the secondary beam 400 via detachable connectors to form a safe operating space integrated with the support system.

[0068] Specifically, the array of columns 200 forms the basic support frame, with the supporting brackets 100 providing an extended load-bearing surface at the top of the columns 200. The main beams 300 are symmetrically arranged with double main Bailey beams 60, utilizing the space on both sides of the columns 200 to form stable support points, avoiding the risk of overturning caused by unilateral cantilever. The secondary beams 400 are densely laid vertically on the main beams 300, forming a bidirectional intersecting grid structure, ensuring the uniform transfer of the box girder formwork load to the main beams 300. The protective platform is directly installed on the secondary beams 400, using them as the anchoring foundation for the cantilever beams 61. Operators can complete formwork installation and concrete pouring operations on the platform. The main and secondary beams 400 use standardized components, achieving rapid assembly through modular assembly. The rigid connection between the supporting brackets 100 and the columns 200 ensures joint strength.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A protective platform on a Bailey bridge, characterized in that, include: Multiple cantilever rods, one end of which is used to connect to the Bailey beam and the other end extends outward from the Bailey beam, and the multiple cantilever rods are spaced apart along the extension direction of the Bailey beam; A walking board, which is laid on the cantilever pole; Multiple railing posts are provided, each railing post corresponding to a cantilever beam. One end of each railing post is connected to the end of the cantilever beam away from the Bailey beam. The railing posts extend upward and are used to install guardrails. The protective platform on the Bailey beam includes multiple fixing components, each fixing component corresponding to one of the cantilever beams. The fixing components include: The first limiting plate is disposed between the upper surface of the cantilever rod and the upper chord of the Bailey beam; The second limiting plate is disposed on the lower surface of the upper chord of the Bailey beam; Fasteners that pass through and connect the cantilever rod, the first limiting plate, and the second limiting plate.

2. The protective platform on the Bailey bridge according to claim 1, characterized in that, The railing uprights and the cantilever poles are detachably connected.

3. The protective platform on the Bailey beam according to claim 1, characterized in that, One end of the railing upright is provided with a limiting buckle, and the limiting buckle has a slot. One end of the cantilever rod is accommodated and confined within the slot.

4. The protective platform on the Bailey beam according to claim 3, characterized in that, The inner wall of the slot is provided with at least one first limiting surface, and the outer wall of the cantilever rod is provided with at least one second limiting surface. The first limiting surface abuts against the second limiting surface to restrict the rotation of the railing post relative to the cantilever rod.

5. The protective platform on the Bailey beam according to claim 3, characterized in that, The cantilever rod has a first fixing hole at the end away from the Bailey beam, and the limit buckle has a second fixing hole. The connector passes through the first fixing hole and the second fixing hole in sequence to connect the cantilever rod and the limit buckle.

6. The protective platform on the Bailey beam according to claim 5, characterized in that, The axes of the first fixing hole and the second fixing hole are in the horizontal direction.

7. The protective platform on the Bailey beam according to claim 1, characterized in that, The cantilever rod is detachably connected to the Bailey beam.

8. The protective platform on the Bailey beam according to any one of claims 1 to 7, characterized in that, Multiple walking slabs are laid on the multiple cantilever poles, and a splicing seam is formed between two adjacent walking slabs. The splicing seam is used to install installation clamps, which include: A third limiting plate is disposed on the upper surface of the walking board and abuts against at least two of the walking boards; A fourth limiting plate is disposed on the lower surface of the walking board and abuts against at least two of the walking boards; A locking element is provided through the splice seam to connect the third limiting plate and the fourth limiting plate.

9. A support system for a large-span cast-in-place beam-slab structure, characterized in that, include: A number of columns, arranged in an array; A plurality of supporting brackets are provided on a plurality of columns, and at least some of the columns are provided with the supporting brackets; A plurality of main beams are arranged at intervals along a first direction. The main beams overlap the supporting brackets. Each main beam includes two main Bailey beams arranged in parallel. The two main Bailey beams are respectively located on opposite sides of the same column. A plurality of secondary beams are arranged at intervals along a second direction, which is perpendicular to the first direction. The secondary beams overlap the main beam, and the plurality of secondary beams are used to jointly support the box girder formwork. The protective platform on the Bailey beam as described in any one of claims 1 to 8 is connected to the secondary beam.

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