Construction method of steel structure corridor

Abstract

The application belongs to the technical field of building engineering, and provides a construction method of a steel structure corridor. The forming area of the steel structure corridor is divided, and the forming paragraphs of the steel structure corridor are divided based on the divided area, so that the segmented and zoned production of the steel structure corridor can be realized, and the work efficiency can be better improved. Then, through the setting of the first hoisting device and the second hoisting device, the lifting of the assembling section located in the ground area, the butt joint between the assembling section on the building skirt area and the butt joint between the first pre-assembled section and the second pre-assembled section can be realized, and then the construction of the basic framework of the steel structure corridor is completed. In the whole process, the form of zoned design and segmented lifting can be applied to the construction of the steel structure corridor of super large span and super high-rise, and the safety, efficiency, cost and construction period and other factors in the whole production process can be better controlled, and better economic benefits are obtained.

Description

Technical Field

[0001] This application belongs to the field of building engineering technology, and specifically relates to a construction method for a steel structure corridor. Background Technology

[0002] In today's era of rapid cultural, economic, and technological development, higher demands are placed on high-rise buildings. Super high-rise buildings require a close coordination between form and structure, achieving a perfect blend of strength and beauty through rational mechanical structures and elegant architectural forms, thereby fully expressing the cultural connotations of the architecture. Currently, steel structures are widely used in super high-rise buildings due to their advantages such as rich architectural forms, fast construction speed, short construction period, and ability to meet both architectural aesthetics and functional requirements. For example, steel structure corridors are widely used in various large and complex public buildings.

[0003] However, there are many types of construction processes and technologies for steel structure corridors, and the deformation and internal forces of the structure vary depending on the construction sequence. Therefore, in the construction of ultra-large span and ultra-high-rise steel structure corridors, how to balance factors such as safety, efficiency, cost and construction period has become a major challenge. Summary of the Invention

[0004] In order to overcome at least one of the disadvantages of the prior art, the purpose of this application is to provide a construction method for a steel structure corridor.

[0005] The technical means adopted in this application to solve the above-mentioned technical problems are:

[0006] A construction method for a steel structure connecting corridor includes the following steps:

[0007] Obtain the ground area and podium area corresponding to the preset position of the steel structure corridor;

[0008] The steel structure corridor is divided into a first pre-assembled section and a second pre-assembled section located at both ends, and several assembly sections located in the middle of the steel structure corridor; wherein the number of assembly sections corresponds to the number of sections in the ground area and the podium area.

[0009] The construction of the corresponding assembly sections is carried out in the ground area and the podium area respectively, and the construction of the first pre-assembled section and the second pre-assembled section is carried out at both ends of the preset position of the steel structure corridor.

[0010] Based on the ground area, a primary lifting device is set up. According to the height difference between the podium area and the ground area, the assembly section located in the ground area is lifted step by step and connected with the assembly section on the podium area to form an integral assembly section.

[0011] Two-stage lifting devices are installed on the first pre-assembly section and the second pre-assembly section to lift the assembled section after it is formed as a whole. After being lifted to the specified elevation, the connection between the first pre-assembly section and the assembled section, and between the second pre-assembly section and the assembled section are completed.

[0012] Furthermore, before constructing the assembled section, formwork columns are constructed on the ground area and the podium area respectively, and formwork beams are installed on the top of the formwork columns to form a construction platform.

[0013] In the above implementation process, the frame columns and frame beams can form a construction platform on the ground or the top surface of the building podium, so that when the assembly section is constructed, the assembly section is formed on the formed construction platform, thereby avoiding the impact of ground factors on the construction quality.

[0014] Furthermore, the lifting operation of the assembled section using the primary lifting device also includes the following steps:

[0015] Obtain the primary lifting point for the assembled section on the ground area;

[0016] The primary lifting device is set according to the position of the primary lifting point. The primary lifting device includes a lifting bracket set on the ground area. Every two lifting brackets form a group. A lifting beam is set on the top of the group of lifting brackets, and a first lifting device is set on the lifting beam. The position of the first lifting device corresponds to the position of the primary lifting point.

[0017] In the above implementation process, when lifting and connecting the assembly section, the assembly section on the ground area is lifted first. Before lifting, the primary lifting point on the assembly section needs to be confirmed to improve the force balance of the assembly section during lifting. At the same time, by setting up lifting brackets and lifting beams in conjunction with the first lifting device to lift the assembly section, the controllability of the lifting operation can be improved during the lifting process, which can help reduce construction risks.

[0018] Furthermore, before lifting the assembled segment after it has been formed as a whole, the following steps are also included:

[0019] Obtain the three-level lifting points of the assembled section after preliminary assembly;

[0020] A three-stage lifting device is installed on the podium area according to the location of the three-stage lifting points. The three-stage lifting device is used to lift the assembled section after preliminary assembly.

[0021] In the above implementation process, when there are many areas in the building's apron, the span of the pre-assembled assembly segment is relatively large. Therefore, the lifting points of the pre-assembled assembly segment can be reconfirmed, i.e., the three-level lifting points are obtained. At the same time, the three-level lifting device can be set on the building's apron area to facilitate the secondary lifting of the pre-assembled assembly segment, thereby connecting it with the assembly segments on other building's apron areas to finally form the whole assembly segment.

[0022] Furthermore, before performing the lifting operation of the assembled section, the following steps are also included:

[0023] Corresponding to the location of the primary lifting device and / or the tertiary lifting device, auxiliary supports are installed in the bottom space of the ground area and the bottom space of the podium area to form a structural support system in the vertical direction.

[0024] In the above implementation process, the auxiliary support can be set so that the bottom force of the primary lifting device and the tertiary lifting device can be directly transferred to the hard foundation at the bottom, thereby improving the support reliability of the primary lifting device and the tertiary lifting device, and at the same time, it can also play a role in protecting the bottom floor slab.

[0025] Furthermore, the first pre-assembly section and the second pre-assembly section are provided with a first upper chord and a first lower chord, and the assembled section after forming the whole is provided with a second upper chord and a second lower chord;

[0026] The extension length of the first upper chord is greater than the extension length of the first lower chord, and the extension length of the second lower chord is greater than the extension length of the second upper chord, so as to form a staggered connection structure between the first pre-assembled section and the assembled section, and between the second pre-assembled section and the assembled section.

[0027] In the above implementation process, the first pre-assembled section, the second pre-assembled section, and the assembled section after forming the whole are designed to form the staggered connection structure; the staggered connection structure can facilitate the overall lifting of the assembled section after forming the whole and reduce the construction difficulty.

[0028] Furthermore, when lifting the assembled section after it has been formed as a whole using the secondary lifting device, the following steps are also included:

[0029] Obtain the secondary lifting point of the assembled segment after it has been formed as a whole;

[0030] The secondary lifting device is set according to the position of the secondary lifting point. The secondary lifting device includes a second lifter set on the first upper chord, and the bottom connection point of the second lifter is set on the second lower chord.

[0031] In the above implementation process, based on the formed staggered connection structure, the secondary lifting device can be directly installed on the first upper chord. Compared with the flat cut lifting docking method, the difficulty of setting up the secondary lifting device can be effectively reduced, making the docking operation between the first pre-assembly section, the second pre-assembly section and the assembly section more convenient.

[0032] Furthermore, the lifting of the assembled section also includes the following steps:

[0033] The stress level is set in stages;

[0034] When the lifting stress is reached at each level, the operation of the corresponding lifting device is stopped in order to check the current lifting status.

[0035] In the above implementation process, by setting the lifting stress in stages, the protection of the assembly section can be improved during the pre-lifting stage, which facilitates the monitoring of the construction quality of the assembly section and also improves construction safety.

[0036] Furthermore, after the tiered upgrade is completed, the following steps are also included:

[0037] Set the ground clearance distance, and stop the lifting operation when the assembled section reaches the ground clearance distance standard;

[0038] Set the time for the assembly section to remain off the ground and check its status after it leaves the ground.

[0039] In the above implementation process, by setting the ground distance and ground dwell time, it is convenient to observe the assembled section while it is suspended, further monitor the construction quality of the assembled section, and improve the quality assurance of the assembled section after it is formed.

[0040] Furthermore, after the assembly section is lifted off the ground, the following steps are also included:

[0041] The lifting parameters of the assembled section are corrected, including the ground distance of each lifting point and the lifting speed.

[0042] After the assembly section is connected with the first pre-assembly section and the second pre-assembly section, a synchronous graded unloading method is adopted to control the unloading stress at each lifting point.

[0043] In the above implementation process, by correcting the lifting parameters of the assembled section, the reliability of the assembled section in subsequent lifting operations can be further improved, and the work efficiency can be increased. At the same time, by adopting a synchronous and graded unloading method, the uniformity of unloading stress can be improved in the later unloading stage, avoiding stress concentration at individual lifting points during unloading, which would affect the overall construction quality of the connecting corridor.

[0044] Compared with the prior art, this application has at least the following beneficial effects:

[0045] This application provides a construction method for a steel structure corridor, which can be applied to the construction of ultra-large span, ultra-high-rise steel structure corridors. By dividing the forming area of ​​the steel structure corridor and further dividing the forming segments based on the divided areas, the segmented and zoned fabrication of the steel structure corridor can be achieved. Finally, the steel structure corridor is completed through lifting and assembly. This allows for better control of factors such as safety, efficiency, cost, and construction period throughout the entire fabrication process, resulting in better economic benefits. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a top view of the steel structure connecting corridor in this application.

[0048] Figure 2 This is a schematic diagram showing the location of the lifting support, ground area, and podium area in this application.

[0049] Figure 3 This is a schematic diagram showing the layout points of the jig column in this application.

[0050] Figure 4 This is a schematic diagram showing the location of the frame column in this application.

[0051] Figure 5 This is a schematic elevation view of the frame column after its installation in this application.

[0052] Figure 6 This is a schematic diagram of the structure after the crossbeam of the jig frame in this application is installed.

[0053] Figure 7 This is a schematic elevation view of the frame beam after it has been installed in this application.

[0054] Figure 8This is a schematic diagram of the auxiliary support structure in this application.

[0055] Figure 9 This is an enlarged structural diagram of the connection between the auxiliary support and the lifting support in this application.

[0056] Figure 10 This is a structural schematic diagram of the primary lifting device of this application.

[0057] Figure 11 This is a schematic diagram of the assembly of the web member of the assembly section in this application.

[0058] Figure 12 This is a schematic elevation view of the lower chord section of the assembled segment after installation.

[0059] Figure 13 This is an elevation view of the web member of the assembled section of this application being installed on the lower chord member.

[0060] Figure 14 This is an elevation view of the upper chord section of the assembled segment of this application being installed on the web section.

[0061] Figure 15 This is an elevation view of the lifting device used in this application during the lifting process.

[0062] Figure 16 This is a structural diagram of the assembled section of this application.

[0063] Figure 17 This is an elevation view of the lifting device during the lifting process of the secondary lifting device in this application.

[0064] Figure 18 This is a schematic diagram of the docking structure between the assembly section and the first pre-assembly section and the second pre-assembly section of this application.

[0065] Figure 19 This is a schematic diagram of the steel structure corridor after the reinforcement structure of this application has been removed.

[0066] Figure 20 This is a schematic diagram of the steel structure corridor after the removal of the secondary lifting device in this application.

[0067] Marker explanation:

[0068] 1-Steel structure connecting corridor, 101-Ground area, 102-Plank area, 11-First pre-assembled section, 111-First upper chord, 112-First lower chord, 12-Second pre-assembled section, 13-Assembled section, 131-Second upper chord, 132-Second lower chord, 14-Basement structure, 141-Auxiliary support, 142-Hard foundation, 143-Floor slab, 15-Reinforcing bar;

[0069] 2-Buildings;

[0070] 3-First-stage lifting device; 31-Lifting support; 32-Lifting beam; 33-First lifting device;

[0071] 4-Secondary lifting device; 41-Secondary hoist;

[0072] 5-Frame column, 50-Layout point, 51-Frame crossbeam. Detailed Implementation

[0073] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0074] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Similar reference numerals and letters denote similar items in the following figures; therefore, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, in the description of this application, the terms “first,” “second,” “primary,” “secondary,” etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0075] With the rapid development of society and the economy, steel structure corridors are increasingly widely used in high-rise and super high-rise buildings. Currently, the construction methods for steel structure corridors can generally be divided into two forms: First, when the predetermined height of the steel structure corridor is relatively low, it can be assembled step-by-step using scaffolding and steel components hoisted together. However, this method requires frequent hoisting of steel components, and workers are operating at heights, posing significant construction risks. Furthermore, even if simultaneous splicing from both ends is performed, it still requires a considerable amount of time, making it difficult to guarantee the construction schedule. The second method, also suitable for situations where the predetermined height of the steel structure corridor is relatively low, and there is sufficient open space below the predetermined location, and the span of the completed corridor is usually short, allows for the fabrication of the corridor's main structure on the ground, followed by hoisting and connection using cranes or other equipment. However, this method is not applicable when encountering building scenarios with a podium structure. Neither of these two methods is well-suited for the construction of super high-rise and ultra-large span steel structure corridors.

[0076] Based on this, such as Figure 1-20 As shown in the figure, this embodiment provides a construction method for a steel structure corridor. This construction method can be applied to the construction of super high-rise and super large span steel structure corridors, and can simultaneously take into account construction safety and construction efficiency.

[0077] The construction method of a steel structure connecting corridor provided in this embodiment mainly includes the following steps:

[0078] S10. Obtain the ground area 101 and the podium area 102 corresponding to the preset position of the steel structure corridor 1; at this time, the vertical projection plane of the steel structure corridor 1 falls within the range after splicing the corresponding ground area 101 and podium area 102.

[0079] S20. The steel structure corridor 1 is divided into a first pre-assembled section 11 and a second pre-assembled section 12 located at both ends, and a number of assembly sections 13 located in the middle of the steel structure corridor 1; wherein the number of assembly sections 13 corresponds to the number of ground area 101 and podium area 102.

[0080] In some embodiments, the first pre-assembled section 11 and the second pre-assembled section 12 are respectively set on the buildings 2 at both ends of the steel structure corridor 1 at a preset position. When the plurality of assembly sections 13 are connected with the first pre-assembled section 11 and the second pre-assembled section 12, they are assembled into an integral assembly section 13 by splicing the plurality of assembly sections 13. At this time, the connection operation is concentrated between the first pre-assembled section 11 and the assembly section 13, and between the second pre-assembled section 12 and the assembly section 13.

[0081] In some embodiments, the number of assembly segments 13 corresponds one-to-one with the total number of ground areas 101 and podium areas 102; however, when the outward extension length of the podium area 102 directly below the first pre-assembly segment 11 and the second pre-assembly segment 12 is less than the extension length of the first pre-assembly segment 11 and the second pre-assembly segment 12, the podium area 102 located below the first pre-assembly segment 11 and the second pre-assembly segment 12 does not need to be equipped with the assembly segments 13.

[0082] In some embodiments, the area directly above the podium area 102 is an open space.

[0083] S30. Construction of the corresponding assembly segments 13 is carried out in the ground area 101 and the podium area 102 respectively. Construction of the first pre-assembled segment 11 and the second pre-assembled segment 12 is carried out at both ends of the predetermined position of the steel structure corridor 1. At this time, the construction of the assembly segments 13 in the ground area 101 and the podium area 102 can be realized simultaneously. At the same time, the construction of the assembly segments 13 can also be realized simultaneously with the first pre-assembled segment 11 and the second pre-assembled segment 12. The overall construction period can be better controlled, and the corresponding labor costs can be reduced. Moreover, except for the construction of the first pre-assembled segment 11 and the second pre-assembled segment 12, the remaining assembly segments 13 are all fabricated on the ground and the top surface of the podium, which can effectively reduce construction risks and improve safety.

[0084] S40. Based on the ground area 101, a primary lifting device 3 is set up. According to the height difference between the podium area 102 and the ground area 101, the assembly section 13 located in the ground area 101 is lifted step by step, and the connection between the assembly section 13 and the podium area 102 is completed to form a whole assembly section, such as... Figure 15-16 As shown.

[0085] S50. A two-stage lifting device 4 is installed on the first pre-assembly section 11 and the second pre-assembly section 12 to lift the assembled section 13 after it has been formed as a whole. After the assembled section 13 is lifted to the specified elevation, the connection between the first pre-assembly section 11 and the assembled section 13, and between the second pre-assembly section 12 and the assembled section 13, is completed, thereby completing the basic structure of the steel structure corridor 1. Figure 17-20 As shown.

[0086] In the above implementation scheme, the forming area of ​​the steel structure corridor 1 is divided into a ground area 101 and a podium area 102. Simultaneously, based on the divided areas, the forming segments of the steel structure corridor 1 are further divided into the first pre-assembled segment 11, the second pre-assembled segment 12, and the assembly segment 13. This allows for segmented and zoned fabrication of the steel structure corridor 1, significantly improving work efficiency. Then, the first-stage lifting device 3 lifts the assembly segment 13 located in the ground area 101, connecting it to the assembly segment 13 in the podium area 102 until a complete assembly segment 13 is formed. At this point, the second-stage lifting device 4 facilitates the connection between the assembly segment 13 and the first pre-assembled segment 11 and the second pre-assembled segment 12, thereby completing the construction of the basic structure of the steel structure corridor 1. The entire process adopts a zoned design and segmented lifting approach, which can be applied to the construction of steel structure corridors with ultra-large spans and ultra-high-rise buildings. Furthermore, factors such as safety, efficiency, cost, and construction period can be better controlled throughout the entire production process, resulting in better economic benefits.

[0087] As one embodiment, prior to step S30 above, the following steps are also included:

[0088] S25. Construct frame columns 5 on the ground area 101 and the podium area 102 respectively, and install frame beams 51 on the top of the frame columns 5 to form a construction platform. Through the frame columns 5 and frame beams 51, a ground-level construction platform can be formed on the ground or the top surface of the podium. This allows the assembly section 13 to be fabricated on the formed construction platform during construction, thus avoiding the impact of ground factors on construction quality. For example, uneven ground can affect the installation efficiency and quality of the assembly section 13; when the assembly section 13 is close to the ground, the installation and welding of key parts becomes difficult; and when the assembly section 13 is close to the ground, coating processing cannot be performed.

[0089] In some embodiments, the construction based on the formwork column 5 may include the following steps:

[0090] S251. According to the layout drawing of the formwork, use a total station and other equipment to measure and lay out the positions of the formwork columns 5 to form the layout points 50 of the formwork columns 5. Figure 3 As shown.

[0091] S253. According to the measured layout points 50, hoist the jig column 5 using a hoisting method and install and fix it, such as... Figure 4 As shown.

[0092] S255, Install the crossbeam 51 of the frame to form a construction platform, such as Figure 6-7As shown.

[0093] In some embodiments, the construction based on the assembled segment 13 may include the following steps:

[0094] S301, in the ground area 101 and the podium area 102, the web members of the assembly section 13 are assembled and connected, such as... Figure 11 As shown.

[0095] S303. On the formed construction platform, the lower chord portion of the assembly section 13 is assembled and connected, such as... Figure 12 As shown.

[0096] S305. Assemble and connect the web member portion of the assembled section 13 to the lower chord portion, such as... Figure 13 As shown.

[0097] S307. Assemble and connect the upper chord portion of the assembled section 13 to the installed web member portion, as follows: Figure 14 As shown.

[0098] In some embodiments, the construction based on the first pre-assembled section 11 and the second pre-assembled section 12 may include the following steps:

[0099] S311. Assemble the upper chord and web members corresponding to the first pre-assembled section 11 and the second pre-assembled section 12 into a whole on a flat ground.

[0100] S313. The lower chord and web members corresponding to the first pre-installed section 11 and the second pre-installed section 12 are hoisted at preset positions to form protruding structures at both ends of the preset positions of the steel structure corridor.

[0101] S315. Hoist and install the assembled upper chord and lower chord sections. At this point, refer to... Figure 17 As shown.

[0102] As one embodiment, when performing step S40 above, the following steps may also be included:

[0103] S42. Obtain the primary lifting point of the assembly section 13 on the ground area.

[0104] S44. The primary lifting device 3 is installed according to the position of the primary lifting point; wherein, the primary lifting device 3 includes a lifting bracket 31 installed on the ground area, with every two lifting brackets 31 forming a group, and a lifting beam 32 installed on the top of the grouped lifting brackets 31, and a first lifting device 33 installed on the lifting beam 32, the position of the first lifting device 33 corresponding to the position of the primary lifting point, such as... Figure 10 , 15As shown.

[0105] In some embodiments, when lifting and connecting the assembly section 13, the assembly section 13 on the ground area 101 is lifted first. Before lifting, the primary lifting point on the assembly section 13 needs to be confirmed to improve the force balance of the assembly section 13 during lifting. At the same time, by using a lifting bracket 31, a lifting beam 32 and a first lifting device 33 to lift the assembly section 13, the controllability of the lifting operation is higher during the lifting process, which can help reduce construction risks.

[0106] As one embodiment, before performing step S50 above, the following steps may also be performed:

[0107] S46. Obtain the three-level lifting points of the assembled section after preliminary assembly.

[0108] S48. A three-stage lifting device is installed on the podium area 102 according to the location of the three-stage lifting points. The three-stage lifting device is used to lift the assembled section 13 after preliminary assembly.

[0109] In some embodiments, when there are many podium areas 102, the span of the pre-assembled assembly segment 13 is relatively large. Therefore, the lifting points of the pre-assembled assembly segment 13 can be reconfirmed, i.e., the three-level lifting points are obtained. At the same time, the three-level lifting device can be set on the podium area 102 to facilitate the secondary lifting of the pre-assembled assembly segment 13, so as to connect with the assembly segments 13 on other podium areas 102 to finally form the whole assembly segment 13.

[0110] In some embodiments, the structure of the three-stage lifting device can refer to that of the first-stage lifting device 3.

[0111] As one embodiment, before lifting the assembly segment 13, the following steps are also included:

[0112] S401. When a basement structure 14 exists at the bottom of the ground area 101, an auxiliary support 141 is installed at the basement structure 14 at the bottom of the ground area 101, corresponding to the location of the primary lifting device 3. When there is a multi-story basement structure, the auxiliary support 141 should be installed in each floor of the basement structure 14, and the primary lifting device 3 and the auxiliary support 141 should be on the same straight line in the vertical direction. At this time, the bottom of the lowest auxiliary support 141 is supported on a hard foundation 142, while the auxiliary supports 141 of different floors and the auxiliary supports 141 and the lifting bracket 31 of the primary lifting device 3 are tightly installed on both sides of the floor slab 143, thereby forming a structural support system in the vertical direction. Figure 8-9 As shown.

[0113] In some embodiments, before lifting the pre-assembled assembly segment 13, the following steps are also included:

[0114] S403. When the three-stage lifting device needs to be installed in the podium area 102, the auxiliary support 141 should also be installed in the bottom space of the podium area 102 to realize the top-back operation of the three-stage lifting device.

[0115] In the above implementation process, the auxiliary support 141 allows the bottom force of the primary lifting device 3 and the tertiary lifting device to be directly transferred to the hard foundation 142 at the bottom, avoiding stress concentration that could damage the structure of the floor slab 143. In severe cases, it could also cause the assembly section 13 to overturn during the hoisting process, thereby improving the support reliability of the primary lifting device 3 and the tertiary lifting device, and also protecting the bottom floor slab 143.

[0116] In one embodiment, a first upper chord 111 and a first lower chord 112 are provided on the first pre-assembly section 11 and the second pre-assembly section 12, while a second upper chord 131 and a second lower chord 132 are provided on the assembled section 13 after the whole assembly is formed. The extension length of the first upper chord 111 is greater than the extension length of the first lower chord 112, and the extension length of the second lower chord 132 is greater than the extension length of the second upper chord 131. This creates a staggered connection structure between the first pre-assembly section 11 and the assembled section 13, and between the second pre-assembly section 12 and the assembled section 13. (See [reference needed]). Figure 17 As shown.

[0117] In the above implementation process, the first pre-assembled section 11, the second pre-assembled section 12, and the assembled section 13 after forming the whole are designed to form the staggered connection structure; the staggered connection structure can facilitate the overall lifting of the assembled section 13 after forming the whole and reduce the construction difficulty.

[0118] As one embodiment, when performing step S50 above, the following steps may also be included:

[0119] S52. Obtain the secondary lifting point of the assembled section 13 after it has been formed as a whole.

[0120] S54. The secondary lifting device 4 is set according to the position of the secondary lifting point. The secondary lifting device 4 includes a second lifter 41 set on the first upper chord 111, and the bottom end connection point of the second lifter 41 is set on the second lower chord 132. Figure 17 As shown.

[0121] In the above implementation process, based on the formed staggered connection structure, the secondary lifting device 4 can be directly installed on the first upper chord 111. Compared with the flat cut lifting docking method, the difficulty of setting up the secondary lifting device 4 can be effectively reduced, making the docking operation between the first pre-assembly section 11, the second pre-assembly section 12 and the assembly section 13 more convenient.

[0122] As one embodiment, when lifting the assembled section 13, the following steps are also included:

[0123] S60. Set the lifting stress in stages; Here, the lifting stress is applied in stages based on the reaction force values ​​at each lifting point calculated by computer simulation. For example, the lifting stress is set to multiple gradients such as 20%, 40%, 60%, and 80%. If no abnormalities are found after lifting, the stress can be continued to be applied to 90%, 95%, and 100% until the assembly section 13 is completely detached.

[0124] S62. When the lifting stress is reached at each level, the operation of the corresponding lifting device should be stopped to check the current lifting status, including the stress at the lifting point, the deformation of the assembly section 13 before and after stress loading, and the stability of the main building structure on building 2.

[0125] In some embodiments, when the assembly section 13 is lifted to complete detachment, the ground clearance of the assembly section 13 should be closely observed. If there is a large deviation in the ground clearance, the lifting device should be jogged to make the ground clearance of each lifting point of the assembly section 13 similar, so as to ensure the smooth operation of the ground clearance.

[0126] In some embodiments, reinforcing rods 15 are also provided at each lifting point to improve the structural stress performance at the lifting point; after the assembly section 13 is connected, the reinforcing rods 15 are usually removed, such as Figure 18-19 As shown.

[0127] It should be noted that steps S60 and S62 can be applied throughout all stages of the lifting operation of the assembly section 13. By setting the lifting stress in stages, the protection of the assembly section 13 can be improved during the pre-lifting stage. If abnormal stress response occurs, the operation can be stopped in time for inspection and handling, facilitating the monitoring of the construction quality of the assembly section 13 and improving construction safety.

[0128] As one embodiment, after the hierarchical upgrade is completed, the following steps are also included:

[0129] S64. Set the ground clearance. When the assembly section 13 reaches the ground clearance standard, stop the lifting operation.

[0130] S66. Set the time for the assembly section 13 to remain off the ground and check its status after it leaves the ground.

[0131] In some embodiments, the distance from the ground is set to approximately 100mm, which is the distance between the assembled section 13 and the flat ground, or the relative distance between the assembled section 13 and the construction platform. The lifting system is then locked, and the assembled section 13 remains suspended in the air for at least 8 hours. A comprehensive inspection of the lifting status is then conducted, including the condition of the lifting points, the load-bearing system, and the status of each lifting device. Only after all indicators are confirmed to be correct can subsequent lifting operations be performed.

[0132] In the above implementation process, by setting the ground distance and ground stay time, it is convenient to observe the assembly section 13 while it is suspended, further monitor the construction quality of the assembly section 13, and improve the quality assurance of the assembly section 13 after it is formed.

[0133] As one embodiment, after the assembly section 13 is lifted off the ground, the following steps are also included:

[0134] S662. Correct the lifting parameters of the assembly section 13, including the ground distance of each lifting point, lifting speed, etc.

[0135] In some embodiments, a measuring instrument is used to detect the height above the ground at each lifting point, the height difference at each lifting point is calculated, and then the height at each lifting point is adjusted according to the obtained height difference so that the assembly section 13 can be in a relatively horizontal position.

[0136] In some embodiments, the adjusted height is used as the new starting position, and the corresponding displacement sensor is reset. During the lifting process, the horizontal posture is maintained until the height is near the design elevation.

[0137] In some embodiments, it is necessary to control the lifting speed, especially when the assembly section 13 is lifted to near the design elevation. At this time, the lifting system can be switched to manual mode to facilitate the adjustment of the posture of the assembly section 13 and the adjustment of the interface position until the structural installation and connection of the steel structure corridor 1 is completed.

[0138] S664. After the assembly section 13 is connected with the first pre-assembly section 11 and the second pre-assembly section 12, a synchronous graded unloading method is adopted to control the unloading stress at each lifting point.

[0139] In some embodiments, during stress unloading, the load is simultaneously lowered by 10% at all lifting points based on the calculated lifting load. During this process, load transfer may occur, meaning that points with faster unloading speeds transfer the load to points with slower unloading speeds, potentially causing overloading at individual lifting points. Therefore, the descent speed must be slowed, and the pressure and displacement values ​​in the computer control system must be closely monitored. If the load at some lifting points exceeds 10% of the pre-unloading load, or if the lifting point displacements asynchronously reach 10mm, unloading at other points must be stopped immediately, and these abnormal points must be unloaded individually. This process is repeated until the steel strands at each lifting device are completely slack.

[0140] In the above implementation process, by correcting the lifting parameters of the assembly section 13, the reliability of the assembly section 13 in the subsequent lifting operation can be further improved, and the work efficiency can be increased. At the same time, by adopting the synchronous graded unloading method, the uniformity of unloading stress can be improved in the later unloading stage, and stress concentration at individual lifting points during unloading can be avoided, which would affect the overall construction quality of the connecting corridor.

[0141] The above description is merely a specific embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should also be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0142] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A construction method for a steel structure connecting corridor, applicable to architectural scenarios with a podium structure, characterized in that, Includes the following steps: Obtain the ground area and podium area corresponding to the preset position of the steel structure corridor, with an open space directly above the podium area; The steel structure corridor is divided into a first pre-assembled section and a second pre-assembled section located at both ends, and several assembly sections located in the middle of the steel structure corridor; wherein the number of assembly sections corresponds one-to-one with the total number of the ground area and the podium area. Before constructing the assembly section, formwork columns are constructed on the ground area and the podium area respectively, and formwork beams are installed on the top of the formwork columns to form a construction platform. The construction of the corresponding assembly sections is carried out in the ground area and the podium area respectively, and the construction of the first pre-assembled section and the second pre-assembled section is carried out at both ends of the preset position of the steel structure corridor. Based on the ground area, a primary lifting device is set up. According to the height difference between the podium area and the ground area, the assembly section located in the ground area is lifted step by step and connected with the assembly section on the podium area to form an integral assembly section. Two-stage lifting devices are installed on the first pre-assembly section and the second pre-assembly section to lift the assembled section after it is formed as a whole. After being lifted to the specified elevation, the connection between the first pre-assembly section and the assembled section, and between the second pre-assembly section and the assembled section are completed.

2. The construction method of the steel structure corridor according to claim 1, characterized in that, The lifting operation of the assembled section using the primary lifting device also includes the following steps: Obtain the primary lifting point for the assembled section on the ground area; The primary lifting device is set according to the position of the primary lifting point. The primary lifting device includes a lifting bracket set on the ground area. Every two lifting brackets form a group. A lifting beam is set on the top of the group of lifting brackets, and a first lifting device is set on the lifting beam. The position of the first lifting device corresponds to the position of the primary lifting point.

3. The construction method of the steel structure connecting corridor according to claim 2, characterized in that, Before lifting the assembled segment after it has been formed as a whole, the following steps are also included: Obtain the three-level lifting points of the assembled section after preliminary assembly; A three-stage lifting device is installed on the podium area according to the location of the three-stage lifting points. The three-stage lifting device is used to lift the assembled section after preliminary assembly.

4. The construction method of the steel structure corridor according to claim 2 or 3, characterized in that, Before lifting the assembled section, the following steps are also included: Corresponding to the location of the primary lifting device and / or the tertiary lifting device, auxiliary supports are installed in the bottom space of the ground area and the bottom space of the podium area to form a structural support system in the vertical direction.

5. The construction method of the steel structure connecting corridor according to claim 4, characterized in that, The first pre-assembly section and the second pre-assembly section are provided with a first upper chord and a first lower chord, and the assembled section after forming the whole is provided with a second upper chord and a second lower chord; The extension length of the first upper chord is greater than the extension length of the first lower chord, and the extension length of the second lower chord is greater than the extension length of the second upper chord, so as to form a staggered connection structure between the first pre-assembled section and the assembled section, and between the second pre-assembled section and the assembled section.

6. The construction method of the steel structure connecting corridor according to claim 5, characterized in that, When lifting the assembled section after it has been formed as a whole using the secondary lifting device, the following steps are also included: Obtain the secondary lifting point of the assembled segment after it has been formed as a whole; The secondary lifting device is set according to the position of the secondary lifting point. The secondary lifting device includes a second lifter set on the first upper chord, and the bottom connection point of the second lifter is set on the second lower chord.

7. The construction method of the steel structure corridor according to claim 1 or 6, characterized in that, The following steps are also included when lifting the assembled section: The stress level is set in stages; When the lifting stress is reached at each level, the operation of the corresponding lifting device is stopped in order to check the current lifting status.

8. The construction method of the steel structure corridor according to claim 7, characterized in that, After the tiered upgrade is completed, the following steps are also included: Set the ground clearance distance, and stop the lifting operation when the assembled section reaches the ground clearance distance standard; Set the time for the assembly section to remain off the ground and check its status after it leaves the ground.

9. The construction method of the steel structure corridor according to claim 8, characterized in that, After the assembly section is lifted off the ground, the following steps are also included: The lifting parameters of the assembled section are corrected, including the ground distance of each lifting point and the lifting speed. After the assembly section is connected with the first pre-assembly section and the second pre-assembly section, a synchronous graded unloading method is adopted to control the unloading stress at each lifting point.

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