A new long overhanging high-altitude lifting platform structure

Abstract

The utility model discloses a novel long overhanging high altitude lifting platform structure, including preinstallation steel structure frame and overhanging lifting platform. Preinstallation steel structure frame is linked with main body structure, contains steel frame beam, steel frame column and reserved welding section, overhanging lifting platform is installed on preinstallation steel structure frame, and includes lifting beam, bottom inclined bracing beam, lateral bracing beam, lifting device bracket and lifting device. Through preinstallation steel structure frame, lifting load is transmitted to each layer of main body structure, the problem that overhanging section of lifting platform is too large caused by structural heteromorphy mutation is solved, satisfies the steel corridor lifting demand under long overhanging condition, and the overall stress is reasonable, and the safety is high, and is applicable to super high -rise connected structure outdoor steel corridor construction.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a novel structure for a long cantilevered high-altitude lifting platform. Background Technology

[0002] In the field of building construction, especially in the construction of outdoor multi-story, large-span, overlapping aerial steel bridges, different construction methods are used for steel bridge installations at different heights. For the installation of shorter steel bridges, temporary fastener-type steel pipe operating platforms are usually erected for personnel to operate, or truck cranes are used for top-down segmented hoisting, or sliding and translation devices can be used for overall translation. For outdoor steel bridges with higher installation heights, temporary attached lifting platforms are generally set up on the main structure, and then hydraulic lifters are used to lift the entire steel bridge.

[0003] However, existing technologies have certain limitations and drawbacks. In the construction of outdoor steel connecting corridors for super high-rise interconnected structures, symmetrical attached lifting platforms are typically used on each main structure. Lifting devices are installed on these platforms, and the steel connecting corridor is assembled on the ground before being lifted as a whole using these platforms. However, attached lifting platforms place high demands on the stress on their own components and also affect the stress on the attached main structure. For safety and other considerations, the maximum cantilever length of the lifting platform attached to the main structure is generally no more than 3 meters, and the greater the cantilever length, the higher the requirements for the material composition and installation method of the lifting platform. When there are abrupt changes in the structure, the cantilever section of the attached lifting platform may become too large, in which case ordinary attached lifting platforms cannot meet the lifting requirements of such steel connecting corridors. Utility Model Content

[0004] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a new type of long cantilever high-altitude lifting platform structure, which aims to solve the problem that the existing attached lifting platform cannot meet the lifting requirements of the steel corridor when facing structural irregularities and abrupt changes that result in an excessively large cantilever section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel long cantilevered high-altitude lifting platform structure, comprising: a pre-installed steel structure frame and a cantilevered lifting platform, wherein the pre-installed steel structure frame is connected to the main structure, the cantilevered lifting platform is installed on the pre-installed steel structure frame, and the cantilevered lifting platform is used for lifting operations on the steel connecting corridor, and the lifting load is transferred to each floor of the main structure through the pre-installed steel structure frame.

[0006] As a further improvement to the technical solution of this utility model, the pre-installed steel structure frame includes steel frame beams, steel frame columns and reserved welding sections. The steel frame beams and steel frame columns are connected to form a frame structure. The reserved welding sections are set at the connection ends of the steel frame beams and are used for welding connections with the steel structure that is subsequently lifted as a whole.

[0007] As a further improvement to the technical solution of this utility model, in the pre-installed steel structure frame, the length of the reserved welding section increases sequentially from the lower layer to the upper layer, with an increment of 100mm.

[0008] As a further improvement to the technical solution of this utility model, the cantilever lifting platform includes a lifting beam, a bottom inclined brace beam, a side support beam, a lifting bracket, and a lifting device. The lifting beam is welded to the pre-installed steel structure frame and the reserved section of the main structure. The bottom inclined brace beam and the side support beam are respectively connected to the lifting beam. The lifting device is installed on the lifting bracket.

[0009] As a further improvement to the technical solution of this utility model, the lifting beam is a box-type steel beam.

[0010] As a further improvement to the technical solution of this utility model, the bottom inclined support beam is made of H-beams; the bottom inclined support beam is welded to the pre-installed steel structure frame, and the weld is an equal-strength penetration weld with a weld grade of not less than level two.

[0011] As a further improvement to the technical solution of this utility model, the lateral support beam is made of H-beams; the lateral support beam is connected to the main structure through embedded plates and embedded parts.

[0012] As a further improvement to the technical solution of this utility model, the lifting bracket is arranged on the left and right sides of the end of the lifting beam, the length of the lifting bracket is 400mm, and the lifting bracket is provided with a channel with a diameter of φ180 for threading steel strands.

[0013] As a further improvement to the technical solution of this utility model, both the pre-installed steel structure frame and the cantilevered lifting platform are made of Q355B steel components.

[0014] As a further improvement to the technical solution of this utility model, the installation sequence of the cantilever lifting platform is as follows: first, install the pre-installed steel structure frame, then hoist the cantilever lifting platform as a whole, and finally install the lifting device.

[0015] This utility model has the following beneficial effects:

[0016] This invention utilizes a pre-installed steel frame and a cantilevered lifting platform. The connection between the pre-installed steel frame and the main structure provides a stable support foundation for the cantilevered lifting platform, effectively improving its overall rigidity. The pre-installed steel frame transfers the load during the lifting process to each layer of the main structure, creating a rationally designed, integrated long cantilevered high-altitude lifting platform. This solves the problem of not being able to install a lifting platform due to abrupt structural changes, meets the lifting requirements of steel corridors in long cantilevered situations, and offers high construction safety and reliability. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 is a schematic diagram of the main structure and the outline of the steel connecting corridor;

[0019] Figure 2 is a schematic diagram showing the relationship between the lifting platform of the long cantilevered high-altitude steel connecting corridor, the steel connecting corridor, and the main structure;

[0020] Figure 3 is one of the plan views of the pre-installation section area;

[0021] Figure 4 is the second plan view of the pre-installation section area;

[0022] Figure 5 shows the elevation view of the long cantilevered lifting platform;

[0023] Figure 6 is a plan view of the long cantilevered lifting platform;

[0024] Figure 7 is a schematic diagram of the lifting operation of the new long cantilever lifting platform;

[0025] Figure 8 is a schematic diagram of the components of the lifting platform for the ultra-long cantilevered high-altitude steel connecting corridor.

[0026] Figure 9 for Figure 8 Enlarged schematic diagram of part A.

[0027] In the diagram: 1-Pre-installed steel structure frame; 2-Cantilevered lifting platform; 3-Main structure; 4-Steel connecting corridor; 5-Embedded plate and embedded parts; 6-Special steel strand; 11-Steel frame beam; 12-Steel frame column; 13-Reserved welding section; 14-Reserved connection section; 21-Lifting beam; 22-Bottom diagonal brace beam; 23-Side support beam; 24-Lifter bracket; 25-Lifter. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] In this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] This utility model provides the following technical solution:

[0033] Reference Figures 1 to 9 A novel long cantilevered high-altitude lifting platform structure includes: a pre-installed steel structure frame 1 and a cantilevered lifting platform 2. The pre-installed steel structure frame 1 is connected to the main structure 3. The cantilevered lifting platform 2 is installed on the pre-installed steel structure frame 1. The cantilevered lifting platform 2 is used to lift the steel corridor. The lifting load is transferred to each floor of the main structure 3 through the pre-installed steel structure frame 1.

[0034] Specifically, in this embodiment, the pre-installed steel structure frame 1 includes a steel frame beam 11, a steel frame column 12, and a reserved welding section 13. The steel frame beam 11 and the steel frame column 12 are connected to form a frame structure. The reserved welding section 13 is set at the connection end of the steel frame beam 11 and is used to weld to the steel structure that is subsequently lifted as a whole.

[0035] Specifically, in this embodiment, the length of the reserved welding section 13 in the pre-installed steel structure frame 1 increases sequentially from the lower layer to the upper layer, with an increment of 100mm.

[0036] Specifically, in this embodiment, the cantilevered lifting platform 2 includes a lifting beam 21, a bottom diagonal brace beam 22, a lateral support beam 23, a lifting bracket 24, and a lifting device 25. The lifting beam 21 is welded to the pre-installed steel structure frame 1 and the reserved section of the main structure. The bottom diagonal brace beam 22 and the lateral support beam 23 are respectively connected to the lifting beam 21. The lifting device 25 is installed on the lifting bracket 24.

[0037] Specifically, in this embodiment, the lifting beam 21 is a box-type steel beam.

[0038] Specifically, in this embodiment, the bottom diagonal bracing beam 22 is made of H-beams; the bottom diagonal bracing beam 22 is welded to the pre-installed steel structure frame 1, and the weld is an equal-strength penetration weld with a weld grade of not less than level two.

[0039] Specifically, in this embodiment, the lateral support beam 23 is made of H-beams; the lateral support beam 23 is connected to the main structure 3 through embedded plates and embedded parts 5.

[0040] Specifically, in this embodiment, the lifting bracket 24 is arranged on the left and right sides of the end of the lifting beam 21. The length of the lifting bracket 24 is 400mm. The lifting bracket 24 is provided with a channel with a diameter of φ180 for threading steel strands.

[0041] Specifically, in this embodiment, both the pre-installed steel structure frame 1 and the cantilevered lifting platform 2 are made of Q355B steel components.

[0042] Specifically, in this embodiment, the installation sequence of the cantilevered lifting platform 2 is as follows: first, the pre-installed steel structure frame 1 is installed; then, the cantilevered lifting platform 2 is hoisted as a whole; and finally, the lifting device 25 is installed.

[0043] In summary, this utility model provides a novel structure for a long cantilevered high-altitude lifting platform, including a pre-installed steel structure frame 1 and a cantilevered lifting platform 2.

[0044] The pre-installed steel frame 1 is connected to the main structure 3. It includes steel frame beams 11, steel frame columns 12, and reserved welding sections 13. The steel frame beams 11 and steel frame columns 12 are connected to form a frame structure. The reserved welding sections 13 are located at the connection ends of the steel frame beams 11, facilitating welding connections with the subsequent overall lifting of the steel structure. Furthermore, the length of the reserved welding sections 13 increases by 100mm from the lower to the upper level, preventing obstruction between the steel connecting corridor and the reserved welding sections 13 during the overall lifting of the multi-story steel structure. The pre-installed steel frame 1 is installed sequentially from the lower to the upper level. During the construction phase of the tower's main structure, each level of the connecting corridor has a reserved connection section 14 of 400mm for the main steel frame beams, facilitating welding connections during the subsequent hoisting of the pre-installed frame.

[0045] The cantilevered lifting platform 2 is installed on the pre-installed steel structure frame 1 to lift the steel connecting corridor 4. It includes a lifting beam 21, a bottom diagonal brace beam 22, a lateral support beam 23, a lifting bracket 24, and a lifting device 25. The lifting beam 21 is a box-shaped steel beam with dimensions B400x400x20x20, welded to the reserved section of the main structure 3 by welding 13. The bottom diagonal brace beam 22 is an H-beam with a cross-sectional dimension H400x400x13x21, connected to the pre-installed section of the steel frame structure by welding. The weld is an equal-strength penetration weld with a weld grade not lower than level two, effectively distributing the lifting load evenly across each layer of the structure. The lateral support beam 23 is an H-beam with dimensions H200x200x8x12, connected to the main structure 3 via 400mmx400mm embedded plates and parts 5, ensuring a stable triangular relationship in all directions for the lifting platform. The lifting brackets 24 are located on the left and right sides of the end of the lifting beam 21, with a length of 400mm. They are provided with φ180 holes for threading steel strands, and the arrangement of the holes coincides with the lower lifting points set on the steel connecting corridor 4 to facilitate the connection and overall lifting of the steel connecting corridor 4. The lifting device 25 is installed on the lifting brackets 24.

[0046] All steel components of the pre-installed steel structure frame 1 and the cantilevered lifting platform 2 are made of Q355B steel. The installation sequence of the cantilevered lifting platform 2 is as follows: first install the pre-installed steel structure frame 1, then hoist the cantilevered lifting platform 2 as a whole, and finally install the lifting device 25.

[0047] The present invention will be further described in detail below with reference to the accompanying drawings:

[0048] Implementation Case:

[0049] This implementation case uses a project on plot 6013 as an example. The above-ground structure of the project consists of two 27-story office buildings, which are mirror images of each other in plan. Both buildings have a structural height of 128.65m. The 9th-11th floors (low-altitude connecting corridor) and the 19th-21st floors (high-altitude connecting corridor) each have three-story steel truss connecting corridors. The maximum installation elevation of the high-altitude connecting corridor is +88.300m, the maximum span is approximately 36m, the maximum height of the corridor itself is 10m, the lifting weight is approximately 390t, and the lifting height is approximately 80m. The maximum installation elevation of the low-altitude connecting corridor is +44.100m, the maximum span is approximately 36m, the maximum height of the corridor itself is 10m, the lifting weight is approximately 390t, and the lifting height is approximately 36m. The projection positions of the low-altitude connecting corridor and the high-altitude connecting corridor coincide. Because both towers have irregular inward reduction at the steel connecting corridor level compared to the standard level, and the inward reduction level is a continuous 3-layer structure, the lifting platform needs a large cantilever length. Therefore, the new long cantilever high-altitude lifting platform structure of this utility model is used to lift the steel connecting corridor.

[0050] The specific implementation of the structure of this new type of long cantilevered aerial lifting platform is as follows:

[0051] Installation of Pre-installed Steel Structure Frame 1: The installation scope of pre-installed steel structure frame 1 is the first frame connecting the steel connecting corridor 4 and the main structure 3. The installation sequence is 19th floor → 20th floor → 21st floor. During the construction phase of the tower's main structure, 400mm reserved connection sections 14 for the main steel frame beams are reserved on the connecting corridor floors 19, 20th, and 21st floors. After the steel frame beams 11 and steel frame columns 12 are hoisted into place, they are connected to form the frame structure. Reserved welding sections 13 are set at the connection ends of the steel beams on each floor, with the reserved section on the 19th floor being 650mm, the reserved welding section on the 20th floor being 750mm, and the reserved welding section on the 21st floor being 850mm. A 260t crawler crane is used to install the pre-installed sections layer by layer from bottom to top and weld them to the reserved connection sections in the main structure.

[0052] Installation of the cantilevered lifting platform 2: After the pre-installed steel structure frame 1 is completed, the cantilevered lifting platform 2 is hoisted as a whole using cranes and tower cranes. The lifting beam 21 is a box-shaped steel beam with dimensions B400x400x20x20, welded to the reserved section of the main structure. The bottom diagonal bracing beam 22 is an H-beam with a cross-sectional dimension H400x400x13x21, connected to the pre-installed steel frame structure and welded; the weld is an equal-strength penetration weld with a weld grade not lower than level two. The lateral support beam 23 is an H-beam with dimensions H200x200x8x12, connected to the main structure via 400mmx400mm embedded plates and embedded parts 5. 400mm long lifting brackets 24 are installed on the left and right sides of the lifting beam 21, with φ180 holes on the brackets; the hole arrangement coincides with the lower lifting points on the steel connecting corridor 4. Finally, the elevator 25 is installed on the elevator bracket 24.

[0053] After the lifting platform is installed and passes inspection, a special bottom anchor and a special steel strand 6 are installed between the lifting device 25 on the lifting platform and the lower lifting point of the ground connecting corridor structure, and then the overall lifting operation of the steel connecting corridor 4 can be carried out.

[0054] In summary, this utility model has the following beneficial effects:

[0055] This invention utilizes a pre-installed steel frame and a cantilevered lifting platform. The connection between the pre-installed steel frame and the main structure provides a stable support foundation for the cantilevered lifting platform, effectively improving its overall rigidity. The pre-installed steel frame transfers the load during the lifting process to each layer of the main structure, creating a rationally designed, integrated long cantilevered high-altitude lifting platform. This solves the problem of not being able to install a lifting platform due to abrupt structural changes, meets the lifting requirements of steel corridors in long cantilevered situations, and offers high construction safety and reliability.

[0056] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used in this document to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only intended to help understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A novel structure for a long cantilevered aerial lifting platform, characterized in that: It includes a pre-installed steel structure frame and a cantilevered lifting platform. The pre-installed steel structure frame is connected to the main structure, and the cantilevered lifting platform is installed on the pre-installed steel structure frame. The cantilevered lifting platform is used to lift the steel corridor and transfer the lifting load to each floor of the main structure through the pre-installed steel structure frame.

2. The novel long cantilevered high-altitude lifting platform structure according to claim 1, characterized in that: The pre-installed steel structure frame includes steel frame beams, steel frame columns, and reserved welding sections. The steel frame beams and steel frame columns are connected to form a frame structure. The reserved welding sections are located at the connection ends of the steel frame beams and are used for welding connections with the steel structure that will be subsequently lifted as a whole.

3. The novel long cantilevered high-altitude lifting platform structure according to claim 2, characterized in that: In the pre-installed steel structure frame, the length of the reserved welding section increases sequentially from the lower layer to the upper layer, with an increment of 100mm.

4. The novel long cantilevered high-altitude lifting platform structure according to claim 1, characterized in that: The cantilevered lifting platform includes a lifting beam, a bottom diagonal brace beam, a lateral support beam, a lifting bracket, and a lifting device. The lifting beam is welded to the pre-installed steel structure frame and the reserved section of the main structure. The bottom diagonal brace beam and the lateral support beam are respectively connected to the lifting beam. The lifting device is installed on the lifting bracket.

5. The novel long cantilevered high-altitude lifting platform structure according to claim 4, characterized in that: The lifting beam is a box-type steel beam.

6. The novel long cantilevered high-altitude lifting platform structure according to claim 4, characterized in that: The bottom diagonal bracing beam is made of H-beams; the bottom diagonal bracing beam is welded to the pre-installed steel structure frame, and the weld is an equal-strength penetration weld with a weld grade of not less than level two.

7. The novel long cantilevered high-altitude lifting platform structure according to claim 4, characterized in that: The lateral support beam is made of H-beams; the lateral support beam is connected to the main structure through embedded plates and embedded parts.

8. The novel long cantilevered high-altitude lifting platform structure according to claim 4, characterized in that: The lifting brackets are located on the left and right sides of the end of the lifting beam. The length of the lifting brackets is 400mm. The lifting brackets are provided with holes with a diameter of φ180 for threading steel strands.

9. The novel long cantilevered high-altitude lifting platform structure according to claim 1, characterized in that: Both the pre-installed steel structure frame and the cantilevered lifting platform are made of Q355B steel components.

10. The novel long cantilevered high-altitude lifting platform structure according to claim 4, characterized in that: The installation sequence of the cantilevered lifting platform is as follows: first, install the pre-installed steel structure frame; then, hoist the cantilevered lifting platform as a whole; and finally, install the lifting device.

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