Component type arched simple hanging bracket and construction method

Abstract

The component type arch-shaped simple hanging bracket and the construction method thereof have the following beneficial technical effects that the component type arch-shaped simple hanging bracket is simple in structure, high in reliability and convenient to mount and dismount, can be produced and processed in batches in a processing factory and then is transported to a site, and has the characteristics of standardization, standardization and component-based performance; the construction method is simple, the safety effect is obvious, and the advantages are more obvious when quality defect repairing is conducted on the side face of the constructed diaphragm beam.

Description

Technical Field

[0001] The present invention relates to the technical field of the construction of cross diaphragms between bridge girders, and more particularly, to a component - type bow - shaped simple hanging bracket and a construction method thereof. Background Art

[0002] During the construction of cross diaphragms between bridge girders, an operation platform is often required to facilitate the installation of cross - diaphragm steel bars, formwork, etc. Traditional techniques include: erecting scaffolding on the original ground, erecting a full - hall support between girders (used when the T - beam has a horseshoe structure), hanging a suspension bracket or a hanging basket, etc. When using the method of erecting scaffolding on the original ground, the height of the scaffold erection is relatively high, the risk is relatively large, the requirement for the bearing capacity of the foundation is relatively high, resulting in a relatively high construction cost and uneconomical; another method is to erect a full - hall support between girders, using the lower horseshoe structure of the T - beam as a fulcrum, and then erecting cross - beams and vertical beams as a construction platform. However, the erection risk is relatively large, and its support structure has relatively high requirements for the bearing capacity of the beam shoe (beam bottom structure), and both installation and disassembly are complex; there is also a method of hanging a bracket or a hanging basket, and there are certain defects or limitations in its structure, installation, and disassembly, such as non - standard use and unsafe installation and disassembly. Therefore, it is urgent to solve the technical problems such as finding a device for controlling the construction of bridge cross diaphragms that is both safe and reliable, easy to install and disassemble, and component - type, as well as its construction method. Summary of the Invention

[0003] In view of this, on the one hand, the present invention provides a component - type bow - shaped simple hanging bracket, which includes a main skeleton, a safety railing, and a footrest; the main skeleton includes a first flange and a second flange vertically arranged at its upper and lower ends, the first flange and the second flange are both arranged on the same side of the main skeleton, the main skeleton includes two that are arranged opposite to each other, and the first flange and the second flange are arranged towards the outer side of the two main skeletons that are arranged opposite to each other; the safety railing includes a plurality of them, and both ends of each are respectively connected to one main skeleton, and both ends of the footrest are connected to the main skeleton and are laid on the second flange.

[0004] Further, a plurality of first cross - bars are sequentially arranged on the main skeleton from bottom to top, and a preset distance is set between the plurality of first cross - bars.

[0005] Further, corresponding to the safety railing, pin holes are provided on the main skeleton, and both ends of the safety railing are inserted into the pin holes to fix the safety railing.

[0006] Further, hooks are respectively provided at the tops of the two main skeletons for lifting the main skeleton.

[0007] Further, the main skeleton is also equipped with a square - steel cross - beam, the square - steel cross - beam is inserted into the hook and is laid on the first flange.

[0008] Further, at the positions where the main framework is perpendicularly connected to the first flange and the second flange, L-shaped steel bars are used for reinforcement.

[0009] Further, a second cross bar is provided on the first flange.

[0010] Further, the height of the main framework is greater than or equal to the height of the beam slab to be assisted.

[0011] On the other hand, the present invention also provides a construction method for a component type bow-shaped simple hanging bracket, including:

[0012] Fabrication of the simple hanging bracket: prefabricate each component of the hanging bracket according to the cross partition parameters of the bridge to be constructed, and assemble them.

[0013] Positioning of the simple hanging bracket: lower the main framework to the wet joint between the beams, make the top of the main framework flush with the bottom of the beam slab, and then pass its upper part through the reserved steel bars on the side of the flange plate of the beam slab.

[0014] Installation of the square steel cross beam: use square steel with a preset cross-sectional area and length as the transverse steel beam, set it on the top surface of the main framework, and connect its two ends to the beam slab.

[0015] Installation of the guardrail and footrest: sequentially install the footrest and the side guardrail.

[0016] Construction of the cross partition beam: utilize the integral simple hanging bracket to carry out the work of binding the steel bars, installing the formwork and pouring the concrete of the cross partition beam between the beams.

[0017] Demolition of the formwork and simple hanging bracket: after the concrete strength of the cross partition beam meets the requirements, demolish the support structure and formwork of the cross partition beam, and demolish the simple hanging bracket.

[0018] Further, the length of the square steel cross beam matches the span between the beams, the length of the beam set on the top of the beam, and its bearing capacity.

[0019] Further, the length of the two ends of the square steel cross beam connected to the beam slab is greater than or equal to 30 cm.

[0020] A component type bow-shaped simple hanging bracket and its construction method provided by the present invention have the following beneficial technical effects: the component type bow-shaped simple hanging bracket of the present invention has a simple structure, high reliability, convenient installation and disassembly, can be mass-produced and processed in a processing factory, and then transported to the site, with the characteristics of standardization, standardization and componentization. The construction method is simple and the safety effect is obvious, especially when repairing the quality defects on the side of the already constructed cross partition beam, the advantages are more obvious. Description of the Drawings

[0021] Upon reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0022] Figure 1 Structural schematic of the bow-shaped simple hanging bracket provided by the embodiment of the present invention Figure 1 ;

[0023] Figure 2 Structural schematic of the bow-shaped simple hanging bracket provided by the embodiment of the present invention Figure 2 ;

[0024] Figure 3 State of the bow-shaped simple hanging bracket provided by the embodiment of the present invention during the construction of the bridge cross diaphragm Figure 1 ;

[0025] Figure 4 State of the bow-shaped simple hanging bracket provided by the embodiment of the present invention during the construction of the bridge cross diaphragm Figure 2 ;

[0026] In the figure, 1, main skeleton; 2, protective railing; 3, footrest; 4, first cross bar; 5, hook; 6, square steel cross beam; 7, second cross bar; 8, precast beam body; 9, exposed steel bars of the precast beam body;

[0027] 11, first flange; 12, second flange; 13, pin hole. Detailed implementation manners

[0028] The following will describe the exemplary embodiments of the present disclosure in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] See Figures 1-4As shown in the figure, it is a component - type bow - shaped simple hanging bracket provided by an embodiment of the present invention, including a main skeleton, a safety railing and a footrest; the main skeleton includes a first flange and a second flange vertically arranged at its upper and lower ends, both the first flange and the second flange are arranged on the same side of the main skeleton, the main skeleton includes two oppositely arranged ones, and the first flange and the second flange are arranged towards the outer side of the two oppositely arranged main skeletons; the safety railing includes a plurality of them, both ends of which are respectively connected to one main skeleton, both ends of the footrest are connected to the main skeleton, and it is laid on the second flange.

[0030] Referring to Figures 1-2 As shown in the figure, a plurality of first cross - bars are successively arranged on the main skeleton from bottom to top, and a preset distance is set between the plurality of first cross - bars.

[0031] Continuing to refer to Figures 1-2 As shown in the figure, corresponding to the safety railing, pin holes are provided on the main skeleton, and both ends of the safety railing are inserted into the pin holes to realize the fixation of the safety railing.

[0032] Referring to Figure 1 、 2 As shown in Figures 、 and 4, hooks are respectively provided at the tops of the two main skeletons for lifting the main skeletons.

[0033] Continuing to refer to Figures 1-4 As shown in the figure, the main skeleton is also equipped with a square steel cross - beam, the square steel cross - beam is inserted into the hook, and it is laid on the first flange.

[0034] In this embodiment, at the positions where the main skeleton is vertically connected to the first flange and at the positions where the main skeleton is vertically connected to the second flange, L - shaped steel bars are used for reinforcement.

[0035] Referring to Figures 1-3 As shown in the figure, a second cross - bar is provided on the first flange.

[0036] In this embodiment, the height of the main skeleton is greater than or equal to the height of the beam - slab to be assisted.

[0037] A manufacturing method of a component - type bow - shaped simple hanging bracket disclosed by the present invention is as follows:

[0038] 1) Manufacturing of the bow - shaped main skeleton: Use HPB300 round steel with a diameter of 20 mm as the vertical main skeleton, its vertical length is the same as the height of the compared beam - slab, generally the vertical skeleton length is not less than the height of the beam - slab, and it is specifically determined according to the height of the beam - slab; the distance between the vertical skeletons is generally set to 400 - 600 mm, and 20 - mm round steel is also used for welding connection between them, the welding is full, the welding slag is removed in time during welding, and welding is supplemented again. Refer to Figure 1, 2 as shown

[0039] (2) An L-shaped rib is provided at the corner of the bow-shaped main skeleton. The main skeleton is connected to the transverse steel bars to form a first flange and a second flange. The corner should be strengthened. Still, round steel bars with a diameter of 20 mm are used for welding and reinforcement. The unilateral dimension is not less than 10 cm, and double-sided welding is used for welding. The welding points and welds should be full. See Figure 2 as shown

[0040] (3) The upper and lower bows are fabricated. The upper bow refers to the upper half of the main skeleton 1 and the first flange 11. Its fabrication is mainly in contact with the beam slab to improve the effective force transmission of the entire bow-shaped skeleton and enhance the bearing capacity of the hanger. Its shape is like a "[-]" shape and is welded to the main skeletons 1 on both sides of the bow-shaped skeleton. The lower bow refers to the lower half of the main skeleton 1 and the second flange 12. The lengths of the upper and lower bows can be set to 300 - 500 mm. The lower bow should not exceed the spacing between the beam slabs, otherwise, it will increase the vertical height of the entire bow-shaped skeleton. See Figure 4 as shown

[0041] (4) Step welding. After the bow-shaped skeleton is welded, a first cross bar 4 needs to be welded between the vertically arranged main skeletons 1 as a horizontal support for use as upper and lower steps. The step spacing is not greater than 300 mm. Round steel bars with a diameter of 20 mm are used as the first cross bar 4 to make the horizontal support, and it is welded to the vertical main skeleton 1. See Figure 2 as shown.

[0042] (5) Installation of the bolt hole 13. On the outer side away from the transverse diaphragm beam, a peripheral guardrail needs to be made for the bow-shaped skeleton to improve construction safety. For this purpose, round steel pipes are welded to the vertically arranged main skeleton 1. The inner diameter of the round steel pipe is not less than 22 mm, the vertical length is not less than 100 mm, and the vertical spacing is preferably 600 mm. Then, steel bars or steel pipes are used as the guardrail 2. The two ends of the steel bar are bent into hooks, and the hook length is not less than 100 mm, which can be inserted into the bolt hole 13 for use as an outer safety protection. See Figure 1 , 2 as shown

[0043] (6) Hook. Weld an arc-shaped hook 5 on the upper horizontal member of the main skeleton 1. The inner diameter of the hook 5 is not less than 100 mm. Its main function is to be used as a lifting hook for this bow-shaped simple hanger. At the same time, to improve the integrity of the bow-shaped simple hanger, a square steel pipe with a size of 90 mm * 50 mm * 3 mm (i.e., square steel crossbeam 6) is horizontally passed through the hook 5, and then the square steel pipe is placed on the surfaces of the precast beam bodies 8 on both sides, which can further improve the overall stress condition of the entire bow-shaped simple hanger. At the same time, it can also provide a hanging point for the safety belt of the operator to improve the safety effect. The strength of the square steel pipe should meet not less than 200 kg, and its bearing pressure is calculated according to Fb = A * σb (where A is the cross-sectional area of the square steel pipe and σb is the tensile strength of the square steel pipe), see Figure 1 、 2 as shown.

[0044] (7) Footrest 3. At the bottom of the main skeleton 1, the footrest 3 is horizontally arranged on the second flange 12. The two sides of the footrest 3 are supported by the horizontal support of the main skeleton, and both ends are placed on the "[-]" shape. When the footrest 3 has a hook, the hook is directly hung on the main skeleton 1, or fixed with a fixing clip to improve stability, see Figure 1 、 2 as shown,

[0045] (8) Safety sign for the main skeleton. Paint the vertical main skeleton with red and white alternating colors to enhance the safety warning effect.

[0046] Another aspect of the embodiment of the present invention also discloses a construction method of a component-type bow-shaped simple hanger, including:

[0047] 1) Preliminary preparation. The precast beam body has been precast and installed in place according to the design requirements. The components of the component-type bow-shaped simple hanger of the present invention have been processed in the factory and transported to the site. The lifting tools used, such as a simple hanger or a crane, have been installed or erected in place.

[0048] 2) Install the bow-shaped simple hanger. Use a crane or a simple hanger to slowly lift it, and then lower it to the wet joint between the beams. Through manual cooperation, observe that its top is flush with the bottom of the beam slab; then its upper horizontal ladder passes through the reserved steel bars on the side of the flange plate of the beam slab, and then adjust the position to lean against the side of the beam slab; see Figure 3 as shown.

[0049] 3) Install the square steel crossbeam. Use a square steel as the crossbeam for horizontal support. Its cross-sectional dimension is not less than 5 cm, and its length should be determined according to the span between the beams, the length of the beam top and the bearing capacity, usually preferably 1.5 m - 2.5 m. The square steel passes through the circular hook 5 on the top surface of the bow-shaped simple hanger, and then penetrates into the top slab of the precast beam body of the beam slab, and the length of the overlap with the beam slab is not less than 30 cm. See Figure 1 、 2 as shown.

[0050] 4) Install guardrails and footboards. After the installation of the bow-shaped simple hanging scaffolds and the square steel cross beams is completed, the hanging scaffolds have a certain stability and load-bearing capacity. Construction workers wear safety belts, hook the belts to the square steel cross beams, and then descend along the stairways on the bow-shaped simple hanging scaffolds. Then, install the footboards and side guardrails in sequence to form a stable construction platform. When installing the footboards, a crane or a simple hoisting device equipped with a chain hoist can be used for hoisting to improve construction efficiency. See Figure 3 、 4 as shown in

[0051] 5) Construction of cross diaphragms. Use the bow-shaped simple hanging scaffold of the present invention as a construction platform to carry out work such as steel bar binding, formwork installation, and concrete pouring of the cross diaphragms between the beams.

[0052] 6) Demolition of cross diaphragm formwork. After the concrete strength of the cross diaphragms reaches the design strength or the technical requirements of the construction plan, use the bow-shaped simple hanging scaffold of the present invention again. Construction workers remove the support structure and formwork through the platform of the bow-shaped hanging scaffold, and then use a crane or a simple hoisting device for hoisting. For the quality defects on the surface of the cross diaphragms, use the hanging scaffold of the present invention again for operation to complete the repair work of the concrete defects.

[0053] 7) Demolition of the bow-shaped simple hanging scaffold. Manually cooperate with the hoisting equipment to first remove the footboards, and then remove the transverse square steel cross beams. The bow-shaped simple hanging scaffold is separated from the beam bodies on both sides and is in a free state. Then, use a crane or a simple hoisting device equipped with a chain hoist to lift the bow-shaped simple hanging scaffold and lower it to the ground or lift it to the bridge deck, and then transfer it to the next construction area. See Figure 3 as shown in

[0054] (10) Auxiliary reinforcement of steel bars. Generally, steel bars are reserved on the side of the flange plate of the beam body for the connection of the wet joints between the beams in the later stage. When installing this bow-shaped hanging scaffold, the hanging scaffold will pass through the steel bars on the flange plate of the beam body, and then bend the steel bars upward, which can also play a role in strengthening the bow-shaped hanging scaffold and improving its bearing capacity. After the bow-shaped hanging scaffold is demolished, restore the transverse steel bars on the flange plate and carry out work such as the construction of the wet joints between the beams.

[0055] The installation of the bow-shaped simple hanging scaffold disclosed in the embodiment of the present invention has strong operability, and can save the installation and disassembly work of large machinery. It can be applied to the work such as steel bar binding and formwork reinforcement in the construction of the cross diaphragm structure between the beam plates. At the same time, after the formwork is demolished in the later stage, it provides a hanging scaffold for the repair of the surface defects of the cross diaphragms, playing a key role.

[0056] The bow-shaped simple hanging scaffold disclosed in the embodiment of the present invention can also adopt lighter materials such as aluminum alloy materials. However, no matter which materials are selected, the main materials should meet the requirements of high strength and high load-bearing capacity, and at the same time can be effectively connected with the precast beam bodies to form a stable structure.

[0057] To reduce the friction between the upper bow of the bow-shaped simple hanger in this embodiment and the outer surface of the beam body, materials such as backing plates and rubber pads are used according to the actual on-site situation to avoid damage or destruction to the turning point of this hanger.

[0058] A component-type bow-shaped simple hanger disclosed in an embodiment of the present invention has the following working principle: making full use of the precast beam slabs that have been installed in place, first using a mobile crane or a hoisting device with a simple configuration of a chain block to lift and install the bow-shaped simple hanger on the side of the beam slab, ensuring that the bottom surface of the main skeleton is flush with the bottom surface of the beam; the upper part of the main skeleton passes through the steel bars reserved in the flange plate of the beam body, and the outer side of the main skeleton is closely attached to the side surface of the flange plate to improve the overall stress state; then a square steel is used as a cross beam to pass through the anchor bars reserved on the top surface of the beam body and is connected to the L-shaped skeleton at the top of the main skeleton, and is fixed with a locking fastener, so that the main skeleton as a whole forms an integral body with the beam body, and then together bears the external force.

[0059] Construction workers go up and down through the ladder on the main skeleton, and then place the footrest. The footrest is connected to the L-shaped skeleton at the bottom of the main skeleton through a hook to maintain the overall stability. The safety belt hook of the operator can be hung on the top square steel pipe cross beam of the main skeleton to protect personal safety. During operation, the force of the operator and auxiliary tools is transmitted to the bow-shaped simple skeleton, and then transmitted to the beam body through the bow-shaped simple skeleton, and then transmitted to the lower structure through the bridge capping beam and pier column, so as to achieve the effect of overall force stability, safety and reliability.

[0060] In summary, a component-type bow-shaped simple hanger and its construction method provided by an embodiment of the present invention have the following beneficial technical effects:

[0061] 1) Standardization. Through the component-type bow-shaped simple hanger and its construction method of the present invention, its various components can be processed and assembled standardly to achieve standardized production. At the same time, using square steel as the cross beam provides a reliable safety belt hanging point and improves operation safety;

[0062] 2) Standardization. Through this hanger, the standardized construction on site can be improved, making full use of the steel bars reserved in the beam body and effectively connecting with them to improve the stability of installation and provide guarantee for safe operation;

[0063] 3) It can be mass-produced, has strong turnover, is convenient for on-site personnel to operate and master, and improves the construction quality control.

[0064] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0065] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A structural bow-shaped simple hanger, characterized in that: It includes a main frame, a guardrail and a foot pedal; the main frame includes a first flange and a second flange vertically arranged at its upper and lower ends, the first flange and the second flange are both arranged on the same side of the main frame, the main frame includes two oppositely arranged edges, and the first flange and the second flange are arranged toward the outer side of the two oppositely arranged main frames; the guardrail includes a plurality of guardrails, each of which is connected to one of the main frames at its two ends, and the two ends of the foot pedal are connected to the main frame and laid on the second flange.

2. The structural member type bow-shaped simple hanger according to claim 1, characterized in that: The main frame is provided with a plurality of first cross bars in sequence from bottom to top, and the plurality of first cross bars are arranged at preset intervals.

3. The structural member type bow-shaped simple hanger according to claim 1, characterized in that: Corresponding to the guardrail, the main frame is provided with a latch hole, and the two ends of the guardrail are inserted into the latch hole to fix the guardrail.

4. The structural member type bow-shaped simple hanger according to claim 1, characterized in that: The tops of the two main frames are respectively provided with hooks for lifting the main frames.

5. The structural member type bow-shaped simple hanger according to claim 4, characterized in that: The main frame is also equipped with a square steel transverse beam, which is inserted into the hook and laid on the first flange.

6. The structural member type bow-shaped simple hanger according to claim 1, characterized in that: The position where the main frame is vertically connected to the first flange, and the position where the main frame is vertically connected to the second flange, are both reinforced with L-shaped steel bars.

7. The structural member type bow-shaped simple hanger according to any one of claims 1 to 6, characterized in that: The height of the main frame is greater than or equal to the height of the beam and slab to be assisted.

8. A construction method of a structural member type bow-shaped simple hanger as claimed in claim 7, characterized in that: include: Simple hanger production: prefabricate various hanger components according to the transverse parameters of the bridge to be constructed, and assemble them; The simple hanger is in place, and the main frame is dropped to the wet joint between beams, so that the top of the main frame is flush with the bottom of the beam slab, and then its upper part passes through the reserved steel bars on the side of the beam slab flange; The installation of square steel transverse beams uses square steel with a preset cross-sectional area and length as transverse steel beams, which are installed on the top surface of the main frame, and the two ends are erected with the beam plate; Installation of guardrails and footboards, footboards and side guardrails in sequence; For the construction of transverse beams, use the integrated simple hanger to tie the reinforcement bars of the transverse beams between beams, install the formwork and pour the concrete; After the formwork and simple hangers are removed and the concrete strength of the diaphragm beam meets the requirements, the diaphragm beam supporting structure and formwork are removed, and the simple hangers are removed.

9. The construction method of the structural member type bow-shaped simple hanger according to claim 8, characterized in that: The length of the square steel transverse beam matches the span between beams, the length erected on the top of the beam and its bearing capacity.

10. The construction method of the structural member type bow-shaped simple hanger according to claim 8, characterized in that: The length between the two ends of the square steel transverse beam and the beam plate is greater than or equal to 30 cm.

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