Work platform for demolition of concrete structure beams
By using the beam to be demolished as a load-bearing structure for the work platform during the demolition of concrete structural beams, the problems of low demolition efficiency, long cycle and high cost in the existing technology are solved, and the efficient and safe beam demolition effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 央固工程科技(上海)有限公司
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-07
AI Technical Summary
The existing concrete structural beams suffer from low demolition efficiency, long cycle, and high cost.
A working platform for demolishing concrete structural beams is provided. The beam to be demolished serves as the load-bearing structure of the working platform, eliminating the need for scaffolding. The working platform can be moved while demolishing during the construction process until the structural beam is completely demolished.
It improved construction efficiency, shortened the construction period, reduced construction costs, and enhanced construction safety and stability.
Smart Images
Figure CN224468757U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of building construction technology, and in particular to a work platform for demolishing concrete structural beams. Background Technology
[0002] Conventional methods for demolishing concrete structural beams typically involve using steel pipe scaffolding or aerial work platforms (scissor lifts, articulated boom lifts, and telescopic boom lifts) to remove the beams.
[0003] The demolition of concrete beams on existing construction sites is mostly carried out indoors or at high altitudes, where access equipment is difficult. Therefore, steel pipe scaffolding is often used to erect working platforms. This method:
[0004] 1. The amount of materials to be transported is large, and the efficiency of indoor or high-rise transportation is low;
[0005] 2. The long erection, dismantling, and material turnover cycle is not conducive to project schedule control;
[0006] 3. Both erection and dismantling require specialized workers, resulting in high labor costs. Utility Model Content
[0007] The purpose of this application is to address the problems of low efficiency, long cycle, and high cost in the demolition of concrete structural beams in the prior art. Therefore, this application provides a working platform for demolishing concrete structural beams, which can utilize the beam to be demolished as the load-bearing structure of the working platform, eliminating the need for scaffolding. Furthermore, the working platform can be moved during construction while demolishing until the structural beam is completely demolished, thereby improving construction efficiency, shortening the construction cycle, and reducing construction costs.
[0008] This application provides a working platform for demolishing a concrete structural beam. The concrete structural beam has a rectangular cross-section, a beam height ≥ 500mm, a beam width ≥ 200mm, and the beam ends are connected to a floor slab or column. The working platform includes two detachably connected platforms, and the length of the platforms is the same as the demolition operation radius.
[0009] The platform includes a platform keel, a load-bearing plate, a guardrail, and a limiting structure; the platform keel is composed of multiple square steel bars welded together and is used to be placed on the upper surface of the concrete structural beam; the load-bearing plate is disposed above the platform keel; the guardrail is welded to the side of the platform keel and is parallel to the concrete structural beam; the limiting structure is composed of multiple square steel bars and is welded to the lower part of the platform keel, and is used to clamp and can move relative to the concrete structural beam.
[0010] The above-mentioned technical solution uses a platform frame, load-bearing plate, and guardrails to form the main body of the platform. This simple structure and easily controllable weight allow the platform to be placed on the beam to be demolished, using the beam as the load-bearing structure of the work platform. This eliminates the need for scaffolding and allows the platform to be moved and dismantled during construction until the structural beam is completely removed, improving construction efficiency, shortening the construction cycle, and reducing construction costs. Furthermore, the limiting structure welded to the bottom of the platform frame clamps the beam to be demolished, preventing the platform from tipping over and improving construction safety. Both the platform frame and the limiting structure are made of square steel, ensuring platform rigidity and allowing for close contact with the beam surface, thus improving platform stability. Moreover, by setting up two platforms, they can be assembled as a whole, ensuring sufficient operating space for construction personnel. Alternatively, when construction approaches the beam end, they can be disassembled for individual use, ensuring sufficient operating space to completely dismantle the beam.
[0011] In some embodiments, the platform has a length and width of 0.5*1m, and the length direction of the platform is the same as the length direction of the concrete structural beam, and the width direction of the platform is the same as the width direction of the concrete structural beam.
[0012] By adopting the above technical solution, the combined length and width of the two platforms are 1*1m, which is suitable for the usual 0.5m demolition operation radius, and the operating space is appropriate, making the overall weight suitable.
[0013] In some embodiments, the platform keel includes three square steel bars, which are welded together to form an I-beam, with the middle square steel bar parallel to the concrete structural beam.
[0014] In some embodiments, the limiting structure includes two sets of limiting components arranged symmetrically. Each limiting component includes two vertically arranged limiting rods with a length ≥ 500 mm and made of square steel. The two limiting rods are respectively welded to two parallel square steels in the platform keel, so that the two sets of limiting components can clamp and move relative to the concrete structure beam.
[0015] In some embodiments, a diagonal brace is welded between the platform keel and the limiting structure, and the diagonal brace is made of square steel.
[0016] By adopting the above technical solution, the platform keel and the limiting structure are respectively supported and fixed at both ends of the diagonal brace, which improves the platform's anti-overturning ability and stability.
[0017] In some embodiments, the guardrail includes two uprights and at least two horizontal bars. Both the uprights and horizontal bars are made of square steel. The two uprights are welded to two parallel square steel bars in the platform keel, and the uprights are welded with U-shaped grooves corresponding to the horizontal bars. The ends of the horizontal bars are engaged in the U-shaped grooves.
[0018] In some embodiments, the upright is provided with at least three through holes in sequence along its height direction;
[0019] The two platforms can be assembled by threading through the through holes of adjacent uprights in the two platforms with screws and then locking them with bolts.
[0020] The above technical solution uses screws and bolts to lock the two platforms together, resulting in a simple structure, convenient operation, and guaranteed assembly reliability.
[0021] In some embodiments, the square steel used for the platform keel, the limiting structure, and the diagonal brace is 50*50mm in cross section.
[0022] In some embodiments, the square steel used for the uprights has a cross-section of 50*50mm, and the square steel used for the crossbars has a cross-section of 30*30mm.
[0023] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the main view structure of this application;
[0025] Figure 2 This is a top view of the structure of the two platforms in the separated state of this application;
[0026] Figure 3 This is a side view diagram of the two platforms in the assembled state of this application.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. Platform; 2. Concrete structural beams;
[0029] 10. Platform keel;
[0030] 20. Upright pole; 21. U-shaped slot; 22. Horizontal bar;
[0031] 30. Limit rod;
[0032] 40. Diagonal brace;
[0033] 50. Screw. Detailed Implementation
[0034] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0035] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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 this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] This application provides a working platform for demolishing concrete structural beams. It can utilize the beam to be demolished as the load-bearing structure of the working platform, eliminating the need for scaffolding. The working platform can be moved while demolishing during construction until the structural beam is completely demolished, reducing labor input, improving construction efficiency, shortening the construction cycle, and reducing construction costs.
[0038] It should be noted that this work platform uses the beam to be dismantled as the load-bearing structure; therefore, there are requirements for the beam to be dismantled.
[0039] Specifically, the concrete structural beam 2 has a rectangular cross-section, a beam height ≥ 500mm (referring to the distance between two planes in the vertical direction of the beam), and a beam width ≥ 200mm, thereby ensuring that the platform 1 can be placed stably on the beam and effectively clamped by the limiting structure; the beam end is connected to the floor slab or column, thereby ensuring that the beam can be completely removed.
[0040] In addition, those skilled in the art know that beams, as load-bearing structures, need to be free from through cracks, corrosion, or severe structural damage to ensure initial load-bearing safety; at the same time, the cantilever length and load-bearing capacity of the beams must meet safety requirements, which can be confirmed by those skilled in the art through conventional construction safety mechanics calculations.
[0041] This work platform can only be used when the beam to be dismantled meets the above requirements.
[0042] Please see Figure 1-3 , Figure 1 This is a schematic diagram of the main view structure of this application; Figure 2 This is a top view of the structure of the two platforms 1 in the separated state of this application; Figure 3 This is a side view of the two platforms 1 in the assembled state of this application.
[0043] This work platform consists of two detachably connected platforms 1. The length of platform 1 is the same as the demolition operation radius. Thus, the two platforms 1 can be assembled into a whole to ensure that construction workers have sufficient operating space during most of the beam demolition work. On the other hand, when the construction is close to the beam end and the beam body is not long enough to install both platforms 1, they can be used separately. That is, the construction workers stand on a single platform 1 to demolish the part to be demolished in front, while when demolishing the last part of the beam end, the construction workers can stand on the floor slab at the beam end or be fixed to the column at the beam end to carry out the demolition, ensuring that the entire beam end is demolished and that the entire process meets the safe demolition operation radius.
[0044] In one embodiment, platform 1 includes platform keel 10, bearing plate (not shown in the figure), guardrail and limiting structure.
[0045] The platform keel 10 is composed of multiple square steel welded together and is used to be placed on the upper surface of the concrete structural beam 2.
[0046] The support plate is set above the platform keel 10 for construction workers to stand on and for construction tools to be placed.
[0047] The guardrail is welded to the side of the platform keel 10 and parallel to the concrete structural beam 2 to protect construction personnel and avoid obstructing construction work in front and movement to another platform 1 behind.
[0048] The limiting structure consists of multiple square steel bars, which are welded to the bottom of the platform keel 10 and used to clamp the concrete structural beam 2, thereby preventing the platform 1 from tipping over and improving construction safety.
[0049] Furthermore, the limiting structure can move relative to the concrete beam 2, meaning there is a certain gap between the limiting structure and the beam, allowing construction workers to lift the platform 1 to detach it from the beam, or to slide the platform 1 on the beam by pulling ropes.
[0050] Typically, during construction, the two platforms 1 can be moved alternately forward, from the beam end to the middle of the beam to prepare for demolition work, and from the middle of the beam to the beam end for segmental demolition of the beam. At this time, by controlling the volume and weight of platform 1, platform 1 can be moved by a single person, thus completing the alternating movement of the two platforms 1.
[0051] During construction, the two platforms 1 can be locked together, and a rope pulling mechanism can be set at the beam end to move the work platform by pulling the rope.
[0052] Meanwhile, this method uses platform keel 10, load-bearing plate and guardrail to form the main body of platform 1, which has a simple structure and easy weight control, making platform 1 suitable for placement on beams to be dismantled and movable. In addition, platform keel 10 and limiting structure are both made of square steel, which can ensure the rigidity of platform 1 and fit with the beam surface, improving the stability of platform 1.
[0053] In one embodiment, the length and width of platform 1 are 0.5*1m, and the length direction of platform 1 is the same as the length direction of concrete structural beam 2, and the width direction of platform 1 is the same as the width direction of concrete structural beam 2. Thus, the length and width of the two platforms 1 combined are 1*1m, which is suitable for the usual 0.5m demolition operation radius, and the operating space is appropriate, making the overall weight suitable.
[0054] In one embodiment, the platform keel 10 includes three square steel bars, which are welded together to form an I-shape, with the middle square steel bar being parallel to the concrete structural beam 2.
[0055] When the length and width of platform 1 are 0.5*1m, the three square steel bars include two with a length of 1m and one with a length of 0.5m.
[0056] In one embodiment, the limiting structure includes two sets of limiting components arranged symmetrically. Each limiting component includes two vertically arranged limiting rods 30, each limiting rod 30 having a length ≥ 500 mm and being made of square steel. The two limiting rods 30 are respectively welded to two parallel square steels in the platform keel 10, allowing the two sets of limiting components to clamp and move relative to the concrete structural beam 2.
[0057] In one embodiment, a diagonal brace 40 is welded between the platform keel 10 and the limiting structure. The diagonal brace 40 is made of square steel. The platform keel 10 and the limiting structure are respectively supported and fixed by the two ends of the diagonal brace 40, which can improve the overturning resistance and stability of the platform 1.
[0058] In one embodiment, the guardrail includes two uprights 20 and at least two crossbars 22.
[0059] Both the uprights 20 and the crossbars 22 are made of square steel. The two uprights 20 are welded to two parallel square steels in the platform keel 10. The uprights 20 are welded with U-shaped slots 21 corresponding to the crossbars 22. The ends of the crossbars 22 are locked in the U-shaped slots 21, which facilitates assembly.
[0060] It should be noted that the guardrail crossbar 22 is typically designed to block lateral impact forces. The crossbar 22 is positioned with its opening facing upwards and secured to the guardrail via the U-shaped slot 21, facilitating assembly while meeting safety requirements. Furthermore, the crossbar 22 can also serve as a base for suspending safety belts and fall arrestors.
[0061] In one embodiment, the upright 20 is provided with at least three through holes in sequence along its height direction.
[0062] The two platforms 1 can be assembled by connecting the through holes of adjacent uprights 20 in the two platforms 1 with screws 50 and locking them with bolts. That is, the two platforms 1 are locked by screws 50 and bolts. The structure is simple, the operation is convenient, and the assembly reliability can be guaranteed.
[0063] At the same time, the locking structure with at least three screws (50mm) on each side (six screws on both sides) ensures stable and reliable assembly.
[0064] In one specific implementation, the square steel used for the platform keel 10, the limiting structure, and the diagonal brace 40 is all 50*50mm in cross section.
[0065] In one specific embodiment, the square steel section used for the upright 20 is 50*50mm, and the square steel section used for the crossbar 22 is 30*30mm.
[0066] In one specific embodiment, the support plate is made of wood, and preferably has a thickness of 30 mm.
[0067] The specific construction process using this work platform is as follows:
[0068] 1) Calculate the beam's bearing capacity to ensure it meets the operating conditions of Platform 1 before proceeding to the next step;
[0069] 2) Install platform 1, install platform 1 to the beam end, and then move the two platforms 1 alternately forward to the middle of the beam;
[0070] 3) Remove the structural beams from the middle to the ends of the beam;
[0071] 4) Construction workers stand inside platform 1 and use pneumatic picks to remove the beams within 0.5 meters in front of platform 1. After the removal is completed, platform 1 is moved back 0.5 meters and the removal is continued. This process is repeated.
[0072] 5) After platform 1 is moved to the beam end, remove the working platform, leaving 0.5m. Construction workers can then dismantle it while standing on the structural slab at the beam end.
[0073] In summary, this work platform is lightweight, making it easy to move and relocate; it utilizes the concrete beams to be demolished as the load-bearing structure, thus occupying little construction space; it has a simple structure, is easy to manufacture and assemble, requires little preparation time, and saves construction time; it can solve the problem of demolition in small indoor spaces; and it can solve the problems of difficult and inefficient transportation and turnover of materials for the demolition of high-rise structures.
[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A working platform for demolishing concrete structural beams, wherein the concrete structural beams have a rectangular cross-section, a beam height ≥ 500 mm, a beam width ≥ 200 mm, and beam ends connected to floor slabs or columns, characterized in that... The work platform includes two detachably connected platforms, and the length of each platform is the same as the demolition operation radius. The platform includes a platform keel, a load-bearing plate, a guardrail, and a limiting structure; the platform keel is composed of multiple square steel bars welded together and is used to be placed on the upper surface of the concrete structural beam; the load-bearing plate is located above the platform keel; the guardrail is welded to the side of the platform keel and is parallel to the concrete structural beam; the limiting structure is composed of multiple square steel bars welded to the lower part of the platform keel and is used to clamp and can move relative to the concrete structural beam.
2. The working platform for demolishing concrete structural beams according to claim 1, characterized in that, The platform has a length and width of 0.5m and 1m, and the length direction of the platform is the same as the length direction of the concrete structural beam, and the width direction of the platform is the same as the width direction of the concrete structural beam.
3. The working platform for demolishing concrete structural beams according to claim 2, characterized in that, The platform keel includes three square steel bars, which are welded together to form an I-shape, with the middle square steel bar parallel to the concrete structural beam.
4. The working platform for demolishing concrete structural beams according to claim 3, characterized in that, The limiting structure includes two sets of symmetrically arranged limiting components. Each limiting component includes two vertically arranged limiting rods with a length ≥ 500 mm and made of square steel. The two limiting rods are respectively welded to two parallel square steels in the platform keel, so that the two sets of limiting components can clamp and move relative to the concrete structure beam.
5. The working platform for demolishing concrete structural beams according to claim 4, characterized in that, A diagonal brace is welded between the platform keel and the limiting structure, and the diagonal brace is made of square steel.
6. The working platform for demolishing concrete structural beams according to claim 3, characterized in that, The guardrail includes two uprights and at least two horizontal bars. Both the uprights and horizontal bars are made of square steel. The two uprights are welded to two parallel square steel bars in the platform keel. The uprights are welded with U-shaped grooves corresponding to the horizontal bars, and the ends of the horizontal bars are engaged in the U-shaped grooves.
7. The working platform for demolishing concrete structural beams according to claim 6, characterized in that, The upright has at least three through holes arranged sequentially along its height direction; The two platforms can be assembled by threading through the through holes of adjacent uprights in the two platforms with screws and then locking them with bolts.
8. The working platform for demolishing concrete structural beams according to claim 5, characterized in that, The square steel used for the platform keel, the limiting structure, and the diagonal brace is 50*50mm in cross section.
9. The working platform for demolishing concrete structural beams according to claim 6, characterized in that, The uprights are made of square steel with a cross section of 50*50mm, and the crossbars are made of square steel with a cross section of 30*30mm.