A method for integrally sliding construction of a structure and a cladding system of a large-span arched roof

Abstract

The application discloses a large-span arch roof structure and enclosure system integrated sliding construction method, which uses arch feet of a large-span arch structure as sliding points, first determines sliding structure range and size of each sliding unit according to project roof structure characteristics, secondly obtains variation of horizontal thrust of the arch roof under the construction condition of only using two side arch feet to slide through computer finite element analysis simulation of the sliding construction process, and then adopts the mode of setting rigid constraint type sliding rails or setting active controllable cables to offset the horizontal thrust of the arch. The application offsets the horizontal thrust of the arch through the mode of setting active controllable cables or setting rigid constraint type sliding rails, avoids a large number of measures of setting common rails in the span, improves the economy of construction, and simultaneously makes the arch always keep a design posture through temporary constraint measures to realize integrated construction of the structure and the enclosure system under the condition of small subsequent deformation.

Description

Technical Field

[0001] This invention relates to the field of steel structure engineering, specifically to an integrated sliding construction method for the structure and enclosure system of a large-span arched roof. Background Technology

[0002] With the development of modern society, building structure types are constantly evolving. Large-span arch structures provide buildings with spacious interior spaces and large clear areas, and are increasingly used in public and industrial buildings due to their functional and aesthetic advantages. While structural design is becoming increasingly mature, ensuring the safe and efficient construction of such structures is undoubtedly a top priority. The main construction methods for arch structures are hoisting, lifting, and sliding. Hoisting and lifting methods require a large site area beneath the structure and take a long time, which is not conducive to projects with tight schedules. Sliding construction, on the other hand, allows for the assembly of the arch roof sliding units by setting up an assembly platform outside the structure during the main structure construction phase, thus shortening the overall construction period. However, due to the special nature of arch structures, the horizontal thrust at the arch feet is relatively large during construction. If not addressed, the arch feet will experience significant horizontal displacement during sliding, causing the entire structure to sag and protrude outwards. The conventional solution to this problem is to install several continuous tracks in the arch span for support, but this results in a large amount of work and poor economic efficiency. Meanwhile, as a process closely related to the structure, the enclosure system is usually installed after the structural construction is completed because the structure will undergo significant deformation during construction. This not only results in a long construction period but also requires a large amount of mechanical equipment and increases the amount of high-altitude construction work. Summary of the Invention

[0003] To address the technical problems existing in the prior art, this invention provides an integrated sliding construction method for the structure and enclosure system of a large-span arched roof. This method counteracts the horizontal thrust of the arch by using active, controllable cables or rigidly constrained sliding rails, avoiding the extensive investment required for conventional tracks in the mid-span and improving construction economy. Simultaneously, temporary constraint measures ensure the arch maintains its designed posture, enabling integrated construction of the structure and enclosure system with minimal subsequent deformation. This integrated construction of the structure and enclosure system also strengthens process overlap and shortens the overall construction period.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an integrated sliding construction method for the structure and enclosure system of a large-span arched roof. This method utilizes the arch feet of the large-span arched structure as sliding points. First, based on the characteristics of the project's roof structure, the range of the sliding structure and the size of each sliding unit are determined. Second, computer finite element analysis is used to simulate the sliding construction process to obtain the changes in the horizontal thrust of the arched roof under the construction condition of sliding only using the arch feet on both sides. Then, rigid constraint sliding rails or active controllable cables are used to counteract the horizontal thrust of the arch, ensuring that it maintains its designed posture throughout the roof structure construction process.

[0005] Furthermore, the specific steps include:

[0006] (1) Based on the shape of the large-span arched roof and the distribution of the lower floors, arrange the sliding track along the arch foot and select horizontal force balancing measures according to the site conditions below the sliding structure.

[0007] (2) When there is a protruding sliding surface under the arched roof, the horizontal thrust is offset by setting a restrained sliding rail; when there is no protruding structure under the roof, the horizontal thrust is offset by setting an active and controllable cable between the arch spans, wherein an active and controllable tensioning device is set at both ends of the cable to adjust the tension of the cable according to the change of the horizontal thrust.

[0008] (3) Assemble the integrated hoisting blocks on the ground near the starting end of the sliding. The integrated hoisting blocks include the main and secondary structures of the roof and part of the enclosure system;

[0009] (4) Based on the shape of the integrated hoisting blocks and the method of horizontal thrust offsetting measures, a sliding assembly platform is set up at the sliding start end. If the horizontal thrust is offset by using a constrained slide rail, a sliding assembly platform is set up. If the horizontal thrust is offset by using an active and controllable cable, a short slide rail is added on the basis of setting up the sliding assembly platform.

[0010] (5) After the integrated hoisting blocks are assembled on the ground, they are hoisted as a whole onto the sliding assembly platform by a large crane. After the adjacent blocks are hoisted, the structural closure between the blocks and the installation of the enclosure system are carried out, thereby completing the assembly of the first sliding unit.

[0011] (6) The horizontal thrust is counteracted by using a constrained slide rail method. After the first sliding unit is assembled, it is unloaded and slides away from the assembly platform. Then, the second sliding unit is assembled on the sliding assembly platform in the same way.

[0012] (7) The first sliding unit is assembled and the horizontal thrust is offset by the active controllable cable method. Since the cable cannot be installed on the assembly platform, it needs to be supported by the short slide rail after sliding off the assembly platform to prevent the arch structure from deflecting and collapsing. Then, the second sliding unit is assembled on the sliding assembly platform in the same way. At the same time, the active controllable cable is installed on the arch foot of the first sliding unit by using the cantilever section of the short slide rail, and tensioned into place by the active controllable tensioning device so that it can resist the horizontal force.

[0013] (8) After the first and second sliding units have slid off the sliding assembly platform, install the enclosure system between the two sliding units;

[0014] (9) After completing the construction of each sliding unit in the above order, the arch foot node is converted, and finally the integrated construction of the arched roof structure and enclosure system is completed.

[0015] Furthermore, the integrated hoisting modular structure adds purlins, walkways, and part of the enclosure system to the assembled modular structure. The modular structure should have a certain rigidity to ensure that the deformation during hoisting and installation will not be too large and cause damage to the enclosure system. To ensure that the deformation of the modular structure meets the requirements, the rods can be replaced and temporary rods can be added.

[0016] Furthermore, for the sliding assembly platform, the size of the lifting blocks is divided according to the lifting performance of the hoisting machinery, and then assembly jigs are set according to the blocks. The number of jig support points should be sufficient to ensure the requirements of the arch design posture.

[0017] Furthermore, the unloading of the sliding unit requires that the horizontal thrust of the arch be completely offset by the designed measures after the sliding unit is removed from the assembly frame, the structure maintains the designed posture, and the subsequent deformation is very small, so as to avoid the risk of leakage of the integrated enclosure system.

[0018] Furthermore, the method of setting rigid constraint type slide rail to offset the horizontal thrust of the arch is chosen when there are protrusions blocking the sliding surface and it is impossible to install cables. Since the horizontal thrust of the arch foot changes continuously during the sliding process, the constraint type slide rail needs to have sufficient rigidity to prevent the structure from collapsing or deflecting due to track deformation.

[0019] Furthermore, the method of using active and controllable cables to counteract the horizontal thrust of the arch is chosen when there are no protrusions obstructing the sliding surface. To install the cables, a short track needs to be set up in the middle of the span, and a cantilever section is designed using the short track. The cables are installed when the sliding unit is located on the cantilever section. Since the horizontal thrust of the arch foot changes continuously during the sliding process, measures need to be taken to actively adjust the cable force to ensure the posture of the structure.

[0020] The present invention has the following beneficial effects:

[0021] (1) The construction method of the present invention only uses the arch foot of the large-span arch structure as the sliding point, and the number of sliding tracks is small, which is economical;

[0022] (2) The measures of the present invention to counteract the horizontal thrust of the arch foot are applicable to situations where the horizontal thrust of the structure is constantly changing;

[0023] (3) The structure of this invention is always in the design state during the construction process. Therefore, metal roof or glass curtain wall and other enclosure systems can be installed at the same time as the structure construction, so as to achieve the purpose of integrated construction of structure and enclosure system and shorten the overall construction period.

[0024] (4) The structure and enclosure system of this invention are constructed simultaneously, and construction machinery can be shared;

[0025] (5) The present invention includes a structure and enclosure system in the ground assembly and hoisting block, which reduces the amount of high-altitude work of the enclosure system;

[0026] (6) The construction method of the present invention emphasizes integration and process interleaving, and is highly applicable to projects that adopt sliding construction and have high time requirements. Attached Figure Description

[0027] Figure 1 This is an axonometric view of the arched structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the horizontal thrust cancellation measure of the present invention;

[0029] Figure 3 This is a schematic diagram of the sliding assembly platform of the present invention;

[0030] Figures 4-10 This is a flowchart of the construction scheme for the arch structure using a constrained sliding rail to counteract horizontal thrust, as described in this invention.

[0031] Figures 11-18 This is a flowchart of the construction scheme for an arch structure that uses active and controllable cables to counteract horizontal thrust, as described in this invention. Detailed Implementation

[0032] Reference Figures 1 to 18 The specific implementation method of the integrated sliding construction method for the structure and enclosure system of a large-span arched roof according to the present invention will be further described.

[0033] A sliding construction method for an integrated structure and enclosure system of a large-span arched roof, specifically including the following steps:

[0034] (1) Based on the shape of the large-span arched roof 1 and the distribution of the lower floors, the sliding track 2 is arranged along the arch foot, and the horizontal force balancing measures are selected according to the site conditions below the sliding structure.

[0035] (2) When there is a protruding sliding surface structure 3 under the arched roof, the horizontal thrust is offset by setting a restrained sliding rail 4. When there is no protruding structure 3 under the roof, the horizontal thrust is offset by setting an active controllable cable 5 between the arch spans. The cable is equipped with an active controllable tensioning device 6 at both ends to adjust the tension of the cable according to the change of the horizontal thrust.

[0036] (3) Assemble the integrated hoisting block 8 on the ground near the starting end of the sliding. The integrated hoisting block 8 includes the main and secondary structures of the roof and part of the enclosure system.

[0037] (4) Based on the shape of the integrated hoisting block 8 and the method of horizontal thrust offsetting measures, a sliding assembly platform 7 is erected at the sliding start end. If the horizontal thrust is offset by using a constrained slide rail 4 (the constrained slide rail 4 is set outside the sliding track and higher than the sliding track), a sliding assembly platform 7 is set up. If the horizontal thrust is offset by using an active controllable cable 5, a short slide rail 11 is added on the basis of setting up the sliding assembly platform 7 (the short slide rail is set vertically and crosses above the sliding assembly platform to form a cantilever section).

[0038] (5) After the integrated hoisting block 8 is assembled on the ground, it is hoisted as a whole onto the sliding assembly platform 7 by a large crane. After the adjacent blocks are hoisted, the structural closure between the blocks and the installation of the enclosure system patch 9 are carried out (the enclosure system refers to the metal roof or glass curtain wall attached to the structure, etc.), thereby completing the assembly of the first sliding unit 10.

[0039] (6) The horizontal thrust is counteracted by using the constraint type slide rail 4. After the first sliding unit 10 is assembled, it is unloaded and slides away from the assembly platform. Then, the second sliding unit 12 is assembled on the sliding assembly platform in the same way.

[0040] (7) The first sliding unit 10 is assembled and the horizontal thrust is offset by the active controllable cable 5. Since the cable cannot be installed on the assembly platform, it needs to be supported by the short slide rail 11 after sliding off the assembly platform to prevent the arch structure from deflecting and collapsing. Then, the second sliding unit 12 is assembled on the sliding assembly platform in the same way. At the same time, the active controllable cable 5 is installed on the arch foot of the first sliding unit 10 by using the cantilever section of the short slide rail 11, and is tensioned into place by the active controllable tensioning device 6 so that it can resist the horizontal force.

[0041] (8) After the first sliding unit 10 and the second sliding unit 12 have both slid off the sliding assembly platform 7, install the enclosure system 13 between the two sliding units;

[0042] (9) After completing the construction of each sliding unit in the above order, the arch foot node is converted, and finally the integrated construction of the arched roof structure and enclosure system is completed.

[0043] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A sliding construction method for an integrated structure and enclosure system of a large-span arched roof, characterized in that: Using the arch feet of the large-span arch structure as sliding points, the sliding structure range and the size of each sliding unit are first determined according to the characteristics of the project's roof structure. Then, the horizontal thrust of the arch roof is obtained by simulating the sliding construction process through computer finite element analysis. Then, the horizontal thrust of the arch is offset by setting rigid constraint sliding rails or pulling active controllable cables, so that it can maintain the design posture throughout the construction of the roof structure. Specifically, the steps include: (1) According to the shape of the large-span arched roof and the distribution of the lower floors, arrange the sliding track along the arch foot and select horizontal force balancing measures according to the site conditions below the sliding structure; (2) When there is a structure protruding from the sliding surface below the arched roof, choose to set a restrained sliding track to offset the horizontal thrust; when there is no protruding structure below the roof, choose to set an active and controllable cable between the arch spans to offset the horizontal thrust, wherein an active and controllable tensioning device is set at both ends of the cable to adjust the tension of the cable according to the change of horizontal thrust; (3) Assemble the cable on the ground near the starting end of the sliding. The integrated hoisting block includes the main and secondary roof structures and part of the enclosure system; (4) According to the shape of the integrated hoisting block and the method of horizontal thrust offsetting measures, a sliding assembly platform is set up at the sliding start end. If the horizontal thrust is offset by the method of constrained sliding rail, a sliding assembly platform is set up. If the horizontal thrust is offset by the method of active controllable cable, a short sliding rail is added on the basis of setting up the sliding assembly platform; (5) After the integrated hoisting block is assembled on the ground, it is hoisted as a whole onto the sliding assembly platform by a large crane. After the adjacent blocks are hoisted, they are then installed. (6) The structural closure between the blocks and the installation of the enclosure system interlocking sections are completed, thereby completing the assembly of the first sliding unit; (7) The horizontal thrust is offset by the constraint-type slide rail method. After the first sliding unit is assembled, it is unloaded and slid off the assembly platform. Then, the same steps are followed to complete the assembly of the second sliding unit on the sliding assembly platform; (8) The horizontal thrust is offset by the active controllable cable method. After the first sliding unit is assembled, the first sliding is carried out. Since the cable cannot be installed on the assembly platform, it is necessary to rely on the short slide rail for support after sliding off the assembly platform to avoid arched structure. After the first and second sliding units are slid off the sliding assembly platform, the second sliding unit is assembled on the platform. At the same time, the cantilever section of the short sliding rail is used to install the active controllable cable on the arch foot of the first sliding unit and tension it in place through the active controllable tensioning device so that it can resist the horizontal force. (8) After the first and second sliding units are slid off the sliding assembly platform, the enclosure system between the two sliding units is installed. (9) After the construction of each sliding unit is completed in the above order, the arch foot node is converted, and finally the integrated construction of the arched roof structure and enclosure system is completed.

2. The integrated sliding construction method for the structure and enclosure system of a large-span arched roof according to claim 1, characterized in that: Integrated hoisting modular design adds purlins, walkways, and part of the enclosure system to the modular assembly structure. The modular design should have a certain rigidity to ensure that the deformation during hoisting and installation is not too large and will damage the enclosure system. To ensure that the deformation of the modular design meets the requirements, the rods can be replaced and temporary rods can be added.

3. The integrated sliding construction method for the structure and enclosure system of a large-span arched roof according to claim 1, characterized in that: The sliding assembly platform is divided into lifting blocks according to the lifting performance of the hoisting machinery. Then, assembly jigs are set up according to the blocks. The number of jig support points should be sufficient to ensure the arch design posture requirements.

4. The integrated sliding construction method for the structure and enclosure system of a large-span arched roof according to claim 1, characterized in that: The unloading of the sliding unit requires that the horizontal thrust of the arch be completely offset by the designed measures after the sliding unit is separated from the assembly frame, the structure maintains the designed posture, and the subsequent deformation is very small, so as to avoid the risk of leakage of the integrated enclosure system.

5. The integrated sliding construction method for the structure and enclosure system of a large-span arched roof according to claim 1, characterized in that: The method of using rigid constraint sliding rails to counteract the horizontal thrust of the arch is chosen when there are protrusions on the sliding surface that block the flow and it is impossible to install cables. Since the horizontal thrust of the arch foot changes continuously during the sliding process, the constraint sliding rails need to have sufficient rigidity to prevent the structure from collapsing or deflecting due to track deformation.

6. The integrated sliding construction method for the structure and enclosure system of a large-span arched roof according to claim 1, characterized in that: The method of using active and controllable cables to counteract the horizontal thrust of the arch is chosen when there are no protrusions obstructing the sliding surface. To install the cables, a short track needs to be set up in the middle of the span. The cantilever section is designed using the short track. The cables are installed when the sliding unit is located on the cantilever section. Since the horizontal thrust of the arch foot changes continuously during the sliding process, the cable force needs to be actively adjusted to ensure the posture of the structure.

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