Construction method of large-inclination inclined twin-structure steel structure

Abstract

The present application relates to the technical field of building structure, and discloses a construction method of large-inclination inclined connected body steel structure. The construction of the large-inclination inclined connected body steel structure involves a tower structure, a large-inclination inclined connected body structure, a podium structure and a temporary support frame. The large-inclination inclined connected body structure comprises an inclined connected body bottom inclined beam, an inclined connected body floor structure and an inclined connected body top inclined beam. In the present application, the tower structure and the temporary support frame are first installed, and then the large-inclination inclined connected body structure is installed. During the installation process, the tower structure and the inclined connected body bottom inclined beam are kept ahead of the inclined connected body floor structure by at least one layer, the inclined connected body top inclined beam is installed in sequence with the inclined connected body floor structure, and finally, the podium structure is installed. Different from a conventional single-frame support frame, the temporary support frame of the present application adopts a steel column-steel beam-inclined support structure system and is gradually installed with the main structure. The steel column, the steel beam and the inclined support are connected by bolts, and the assembly rate reaches 90%, which greatly improves the installation and disassembly efficiency of the support system.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, and in particular to a construction method for a large-angle inclined steel structure. Background Technology

[0002] Driven by the diversification of architectural forms and the multi-functional needs of individual buildings, more and more projects are incorporating elevated connecting corridors between individual buildings to improve their utilization efficiency. This is a special type of high-rise building structure – the continuous steel structure. The inclined continuous steel structure is a special form of continuous steel structure, and its structural complexity presents new requirements and challenges for on-site construction.

[0003] Currently, most construction of inclined steel structures adopts the method of overall hoisting or lifting, but this method has limitations, mainly in three aspects:

[0004] 1. For inclined structures with large inclination angles, the forces on the inclined structure are uneven during the overall hoisting or lifting process, resulting in large off-center loads and low safety.

[0005] 2. For large, integrated structures, the overall high-altitude hoisting solution is difficult to implement due to limitations in current hoisting machinery; while the lifting solution has excessive reaction force at a single lifting point, requiring reinforcement of the lifting frame's reaction structure, which is less economical.

[0006] 3. For integral structures with poor integrity, due to their inherent poor integrity and stability, the integral structure will experience significant stress and deformation during hoisting or lifting, posing a safety hazard. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a construction method for inclined steel structures with large inclination angles. This method is applicable to the construction of connected steel structures with large inclination angles, large volumes, and poor overall integrity. It has a wide range of applications and significantly improves safety.

[0008] To achieve the above objectives, the present invention provides a construction method for a large-angle inclined steel structure, comprising:

[0009] S1: Install the bottom floors and temporary support frames of the tower structure;

[0010] S2: Install the steeply inclined connected structure, and continue installing the tower structure and temporary support frame, as follows:

[0011] S2-1: Install the bottom inclined beam of the inclined connector: Use the installed temporary support frame to install the bottom inclined beam of the inclined connector. Start installing the bottom inclined beam of the inclined connector from the lowest point to the highest point, and ensure that the installation progress of the temporary support frame corresponds to the installation progress of the bottom inclined beam of the inclined connector.

[0012] S2-2: Install the inclined connecting floor structure: Start installing the inclined connecting floor structure when the bottom inclined beam of the inclined connecting unit is 2 floors ahead of the inclined connecting floor structure. At the same time, continue installing the bottom inclined beam of the inclined connecting unit. During the installation process, always keep the bottom inclined beam of the inclined connecting unit at least one floor ahead of the inclined connecting floor structure until the bottom inclined beam of the inclined connecting unit is connected.

[0013] S2-3: Install the top inclined beam of the inclined connecting structure: Start installing the top inclined beam of the inclined connecting structure when the bottom inclined connecting floor structure is installed to the top. The top inclined beam of the inclined connecting structure is installed sequentially from low to high along with the inclined connecting floor structure until the top inclined beam of the inclined connecting structure is connected.

[0014] While implementing S2-1, S2-2, and S2-3, continue installing the tower structure and temporary support frame;

[0015] S3: After the tower structure and the steeply inclined connected structure are installed, the temporary support frame will be removed;

[0016] S4: Install the podium structure;

[0017] Among them, the large tilt angle is defined as a tilt angle of not less than 35 degrees.

[0018] Preferably, the tower structure is at least one floor higher than the inclined connecting floor structure during the installation process until the tower structure is capped.

[0019] Preferably, all temporary support frames corresponding to the inclined steel structure with large inclination angle are removed simultaneously.

[0020] Preferably, the installation sequence of the bottom inclined beam, the floor structure, and the top inclined beam of the inclined connecting structure is from low to high.

[0021] Preferably, the tower structure, the steeply inclined connected structure, and the temporary support frame are operated in an overlapping manner.

[0022] Preferably, the temporary support frame is arranged in a corresponding manner with the hoisting sections of the inclined connecting structure and the arrangement of the lower structure of the temporary support frame.

[0023] Preferably, the temporary support frame is a steel column-steel beam-diagonal brace structure, with the bottom of the steel column anchored above the lower structure, and the top of the steel column connected to the bottom diagonal beam of the diagonal connector.

[0024] Compared with the closest existing technology, the present invention has the following advantages:

[0025] The construction method described in this invention differs from the conventional approach of hoisting or lifting a single, continuous structure. It adopts a temporary support frame + segmented installation approach tailored to the project's characteristics, significantly improving safety. The support system is innovative, differing from conventional lattice-type temporary support frame systems. In this invention, the temporary support frame utilizes a steel column-steel beam-diagonal brace structure, installed progressively along with the main structure, greatly improving the efficiency of material usage and resulting in significant economic benefits. Furthermore, all nodes between the steel columns, beams, and diagonal braces of the temporary support frame are bolted, achieving a 90% assembly rate. This greatly improves the efficiency of installation and dismantling the support system, shortening the construction period. Attached Figure Description

[0026] Figure 1 This is a flowchart of a construction method for a large-angle inclined steel structure provided by the present invention;

[0027] Figure 2 This is a top view of a structure constructed using a method for constructing a large-angle inclined steel structure provided by the present invention.

[0028] Figure 3 This is a three-dimensional axonometric drawing of a structure constructed using a construction method for a large-angle inclined steel structure provided by this invention.

[0029] Figure 4 This is a three-dimensional axonometric drawing of a tower structure based on a construction method for a large-angle inclined steel structure provided by this invention.

[0030] Figure 5 This is a three-dimensional axonometric drawing of a temporary support frame for a construction method of a large-angle inclined steel structure provided by the present invention;

[0031] Figure 6 This is an elevation view of the inclined steel structure of a construction method for a large-angle inclined steel structure provided by the present invention;

[0032] Figure 7 This is a schematic diagram of installation steps C1 of a construction method for a large-angle inclined steel structure provided by the present invention;

[0033] Figure 8 This is a schematic diagram of installation steps C2 of a construction method for a large-angle inclined steel structure provided by the present invention;

[0034] Figure 9 This is a schematic diagram of installation steps C3 of a construction method for a large-angle inclined steel structure provided by the present invention;

[0035] Figure 10 This is a schematic diagram (C4) illustrating the installation steps of a construction method for a large-angle inclined steel structure provided by the present invention.

[0036] Figure 11 This is a schematic diagram (C5) illustrating the installation steps of a construction method for a large-angle inclined steel structure provided by the present invention.

[0037] Figure 12 This is a schematic diagram of installation steps C6 of a construction method for a large-angle inclined steel structure provided by the present invention;

[0038] Figure 13 This is a schematic diagram of installation steps C7 of a construction method for a large-angle inclined steel structure provided by the present invention;

[0039] Figure 14 This is a schematic diagram (C8) illustrating the installation steps of a construction method for a large-angle inclined steel structure provided by the present invention.

[0040] Figure 15 This is a schematic diagram (C9) illustrating the installation steps of a construction method for a large-angle inclined steel structure provided by the present invention.

[0041] Figure 16 This is a schematic diagram (C10) illustrating the installation steps of a construction method for a large-angle inclined steel structure provided by the present invention.

[0042] Figure 17 This is a schematic diagram of installation steps C11 of a construction method for a large-angle inclined steel structure provided by the present invention;

[0043] Figure 18 This is a schematic diagram of the special slot node at the top of the temporary support steel column in a construction method for a large-angle inclined steel structure provided by the present invention;

[0044] Figure label:

[0045] 1. Tower Structure: 11. First Tower; 12. Second Tower; 13. Third Tower; 2. Inclined Connected Structure: 21. First Inclined Connected Structure; 22. Second Inclined Connected Structure; 23. Third Inclined Connected Structure; 24. Bottom Inclined Beam of Inclined Connected Structure; 25. Floor Structure of Inclined Connected Structure; 26. Top Inclined Beam of Inclined Connected Structure; 3. Temporary Support Frame: 31. First Temporary Support Frame; 32. Second Temporary Support Frame; 33. Third Temporary Support Frame; 4. Podium Structure. Detailed Implementation

[0046] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example 1:

[0049] This invention provides a construction method for a large-angle inclined steel structure, such as... Figure 1 As shown, it includes:

[0050] S1: Install the bottom floors and temporary support frames of the tower structure;

[0051] S2: Install the steeply inclined connected structure, and continue installing the tower structure and temporary support frame, as follows:

[0052] S2-1: Install the bottom inclined beam of the inclined connector: Use the installed temporary support frame to install the bottom inclined beam of the inclined connector. Start installing the bottom inclined beam of the inclined connector from the lowest point to the highest point, and ensure that the installation progress of the temporary support frame corresponds to the installation progress of the bottom inclined beam of the inclined connector.

[0053] S2-2: Install the inclined connecting floor structure: Start installing the inclined connecting floor structure when the bottom inclined beam of the inclined connecting unit is 2 floors ahead of the inclined connecting floor structure. At the same time, continue installing the bottom inclined beam of the inclined connecting unit. During the installation process, always keep the bottom inclined beam of the inclined connecting unit at least one floor ahead of the inclined connecting floor structure until the bottom inclined beam of the inclined connecting unit is connected.

[0054] S2-3: Install the top inclined beam of the inclined connecting structure: Start installing the top inclined beam of the inclined connecting structure when the bottom inclined connecting floor structure is installed to the top. The top inclined beam of the inclined connecting structure is installed sequentially from low to high along with the inclined connecting floor structure until the top inclined beam of the inclined connecting structure is connected.

[0055] While implementing S2-1, S2-2, and S2-3, continue installing the tower structure and temporary support frame;

[0056] S3: After the tower structure and the steeply inclined connected structure are installed, the temporary support frame will be removed;

[0057] S4: Install the podium structure;

[0058] Among them, the large tilt angle is defined as a tilt angle of not less than 35 degrees.

[0059] The tower structure must be at least one floor higher than the inclined connected floor structure during the installation process until the tower structure is topped out.

[0060] All temporary support frames corresponding to the inclined steel structure with large inclination angle were simultaneously dismantled.

[0061] The installation sequence of the inclined bottom beam, the inclined floor structure, and the inclined top beam of the inclined connecting structure with a large inclination angle is from low to high.

[0062] The tower structure, the steeply inclined connected structure, and the temporary support frame are operated in an overlapping manner.

[0063] The temporary support frame is configured in accordance with the hoisting sections of the inclined connecting structure and the arrangement of the lower structure of the temporary support frame.

[0064] The temporary support frame is a steel column-steel beam-diagonal brace structure. The bottom of the steel column is anchored and installed above the lower structure, and the top of the steel column is installed and connected to the bottom diagonal beam of the diagonal connector.

[0065] In this embodiment, a construction method for a large-angle inclined steel structure involves three tower structures (11, 12, 13), three large-angle inclined structures (21, 22, 23), a podium structure 4, and three sets of temporary support frames (31, 32, 33). The two ends of the three large-angle inclined structures are connected to the three tower structures respectively, forming a three-sided N-shaped structure. The large-angle inclined structures (21, 22, 23) include a bottom inclined beam (24), a floor structure (25), and a top inclined beam (26).

[0066] The construction method of the present invention utilizes temporary support frames and segmented installation steps to gradually construct up to the top layer. The construction method includes the following construction steps:

[0067] S1: Install the bottom floors and temporary support frames (31, 32, 33) of the tower structure (11, 12, 13);

[0068] S2: Install the steeply inclined connected structures (21, 22, 23), and simultaneously continue installing the tower structures (11, 12, 13) and temporary support frames (31, 32, 33), as follows:

[0069] S2-1: Install the bottom inclined beam (24) of the inclined connector: Use the already installed temporary support frames (31, 32, 33) to install the bottom inclined beam (24) of the inclined connector. The bottom inclined beam (24) of the inclined connector is installed from the lowest point to the highest point, and the installation progress of the temporary support frames (31, 32, 33) is guaranteed to meet the installation progress requirements of the bottom inclined beam (24) of the inclined connector.

[0070] S2-2: Install the inclined connecting floor structure (25): Start installing the inclined connecting floor structure (25) when the inclined bottom beam (24) of the inclined connecting floor structure (25) is 2 floors ahead of the inclined connecting floor structure (25). At the same time, continue to install the inclined bottom beam (24) of the inclined connecting floor structure. During the installation process, always keep the inclined bottom beam (24) of the inclined connecting floor structure (25) at least one floor ahead of the inclined connecting floor structure (25) until the inclined bottom beam (24) of the inclined connecting floor structure is connected.

[0071] S2-3: Install the top inclined beam (26) of the inclined connector: When the bottom inclined connector floor structure (25) is installed to the top, start installing the top inclined beam (26) of the inclined connector. The top inclined beam (26) of the inclined connector is installed sequentially from low to high along with the inclined connector floor structure until the top inclined beam (26) of the inclined connector is connected.

[0072] The installation of the inclined bottom beam (24), the inclined floor structure (25), and the inclined top beam (26) of the inclined connected structure with large inclination angle are all in the order from low to high.

[0073] While implementing S2-1, S2-2, and S2-3, continue installing the tower structure (11, 12, 13) and temporary support frame (31, 32, 33), ensuring that the tower structure (11, 12, 13) being installed is at least one floor ahead of the inclined connecting floor structure (25) until the tower structure is capped.

[0074] S3: After the tower structure (11, 12, 13) and the steeply inclined connected structure (21, 22, 23) are installed, remove the temporary support frame (31, 32, 33);

[0075] S4: Install the podium structure (4).

[0076] The three sets of temporary support frames (31, 32, 33) can be dismantled simultaneously without any order, saving time.

[0077] The installation of the tower structure (11, 12, 13), the steeply inclined connected structure (21, 22, 23), and the temporary support frame (31, 32, 33) are carried out in an overlapping manner, and each part has a specific sequence and constraints during the installation process.

[0078] The temporary support frames (31, 32, 33) should be set up taking into account the hoisting segments of the inclined connecting structure (21, 22, 23) and the arrangement of the lower structure of the temporary support frames.

[0079] The temporary support frames (31, 32, 33) are all composed of steel columns, steel beams, and diagonal braces. The bottom of the steel columns is anchored to the lower structure, and the top directly supports the bottom diagonal beam of the diagonal connector. The steel beams and diagonal braces of the temporary support frames are all bolted to the steel columns.

[0080] The temporary support frame has a special slot at the top of its steel column. Figure 17 This allows the bottom inclined beam (24) of the inclined connector to be directly and accurately positioned.

[0081] When the transport length of the steel columns of the temporary support frame is limited, the support steel columns can be transported to the site in sections, and the sections can be spliced ​​on the ground or at high altitude according to the hoisting sections.

[0082] The temporary support frames (31, 32, 33) are not installed all at once, but are installed in stages according to the installation plan. In each installation stage, the installed temporary support frames are used to ensure that they form a stable structural system.

[0083] A construction method for a large-angle inclined steel structure involves setting displacement monitoring points at the top of the temporary support frame steel columns during the installation of the large-angle inclined steel structure (21, 22, 23) to monitor displacement in real time, so as to ensure that the inclined structure does not shift after being accurately positioned.

[0084] In this embodiment, a construction method for a large-angle inclined steel structure, taking a 16-story tower as an example, is described in detail as follows:

[0085] This embodiment consists of 11 installation steps from the bottom to the top: C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, and C11, as follows: Figures 7 to 17 As shown, the specific steps are as follows (the floor numbers mentioned below all correspond to the floors of the tower):

[0086] C1: Tower structure: Installation of first-floor steel components;

[0087] Temporary support frame: Installed to a height of 13m to ensure that the installed temporary support frame forms a stable structural system. The requirements are the same for all layers above.

[0088] C2: Tower structure: Install 2-3 layers of steel components;

[0089] Large-angle inclined connecting structure: Install 2-3 layers of inclined connecting bottom beams (24), the inclined connecting bottom beams are connected by special slots at the top of the temporary support frame steel columns ( Figure 18 Precise positioning is required, and the installation of the bottom inclined beams of each layer of the inclined connecting structure is the same as that of this layer;

[0090] Temporary support frame: installed at an elevation of 21m.

[0091] C3: Tower structure: Install 4-5 layers of steel components;

[0092] Large-angle inclined connected structure: Install 4-5 layers of inclined connected bottom inclined beams (24), 2-3 layers of inclined connected floor structure (25);

[0093] Temporary support frame: All remaining support frames are installed in this step.

[0094] C4: Tower structure: Install 6-7 layers of steel components;

[0095] Large-angle inclined connected structure: install 6-7 floors of inclined connected bottom inclined beams (24), 4-5 floors of inclined connected floor structure (25); C5: Tower structure: install 8-9 floors of steel components;

[0096] Large-angle inclined connected structure: Install the bottom inclined beams (24) of the 8-9th floor inclined connected structure and the floor structure of the 6-7th floor inclined connected structure (25); at this time, the bottom inclined beams of the inclined connected structure are connected.

[0097] C6: Tower structure: Install 10-11 layers of steel components;

[0098] Large-angle inclined connected structure: install 8 to 10 floors of inclined connected floor structure (25), 9 to 10 floors of inclined connected top inclined beam (26);

[0099] C7: Tower structure: Install 12-13 layers of steel components;

[0100] Large-angle inclined connected structure: install 11-12 floors of inclined connected floor structure (25), 11-12 floors of inclined connected top inclined beam (26);

[0101] C8: Tower structure: Install steel components for the 14th to 16th floors, at which point the tower structure installation is complete;

[0102] Large-angle inclined connected structure: install 13-14 floors of inclined connected floor structure (25), 13-14 floors of inclined connected top inclined beam (26);

[0103] C9: Large-angle inclined connected structure: Install the top inclined beam (26) of the 15-16th layer inclined connected structure, and the installation of the inclined connected steel structure is completed;

[0104] C10: Unload and dismantle the first temporary support frame (31), the second temporary support frame (32) and the third temporary support frame (33). The three support frame systems can be dismantled simultaneously without being restricted by the order of dismantling, saving time.

[0105] C11: Install the podium structure (4).

[0106] During the installation of the large-angle inclined connected structure (21, 22, 23), displacement monitoring points were set at the top of the temporary support frame steel columns to monitor the displacement in real time. The maximum horizontal displacement during the installation process was 6mm and the maximum vertical displacement was 4mm, which meets the specifications.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A construction method for a large-angle inclined steel structure, characterized in that, include: S1: Install the bottom floors and temporary support frames of the tower structure; S2: Install the steeply inclined connected structure, and continue installing the tower structure and temporary support frame, as follows: S2-1: Install the bottom inclined beam of the inclined connector: Use the installed temporary support frame to install the bottom inclined beam of the inclined connector. Start installing the bottom inclined beam of the inclined connector from the lowest point to the highest point, and ensure that the installation progress of the temporary support frame corresponds to the installation progress of the bottom inclined beam of the inclined connector. S2-2: Install the inclined connecting floor structure: Start installing the inclined connecting floor structure when the bottom inclined beam of the inclined connecting unit is 2 floors ahead of the inclined connecting floor structure. At the same time, continue installing the bottom inclined beam of the inclined connecting unit. During the installation process, always keep the bottom inclined beam of the inclined connecting unit at least one floor ahead of the inclined connecting floor structure until the bottom inclined beam of the inclined connecting unit is connected. S2-3: Install the top inclined beam of the inclined connecting structure: When the bottom inclined connecting floor structure is installed to the top, start installing the top inclined beam of the inclined connecting structure. The top inclined beam of the inclined connecting structure is installed sequentially from low to high along with the inclined connecting floor structure until the top inclined beam of the inclined connecting structure is connected. While implementing S2-1, S2-2, and S2-3, continue installing the tower structure and temporary support frame; S3: After the tower structure and the steeply inclined connected structure are installed, the temporary support frame will be removed; S4: Install the podium structure; Among them, the large tilt angle is defined as a tilt angle of not less than 35 degrees.

2. The construction method for a large-angle inclined steel structure as described in claim 1, characterized in that, The tower structure must be at least one floor higher than the inclined connected floor structure during the installation process until the tower structure is topped out.

3. The construction method for a large-angle inclined steel structure as described in claim 1, characterized in that, All temporary support frames corresponding to the inclined steel structure with large inclination angle were simultaneously dismantled.

4. The construction method for a large-angle inclined steel structure as described in claim 1, characterized in that, The installation sequence of the inclined bottom beam, the inclined floor structure, and the inclined top beam of the inclined connecting structure with a large inclination angle is from low to high.

5. The construction method for a large-angle inclined steel structure as described in claim 1, characterized in that, The tower structure, the steeply inclined connected structure, and the temporary support frame are operated in an overlapping manner.

6. The construction method for a large-angle inclined steel structure as described in claim 1, characterized in that, The temporary support frame is configured in accordance with the hoisting sections of the inclined connecting structure and the arrangement of the lower structure of the temporary support frame.

7. The construction method for a large-angle inclined steel structure as described in claim 1, characterized in that, The temporary support frame is a steel column-steel beam-diagonal brace structure. The bottom of the steel column is anchored and installed above the lower structure, and the top of the steel column is installed and connected to the bottom diagonal beam of the diagonal connector.

Images