Cross-basement positive and negative zero plate jump layer steel structure and construction method

Abstract

This application relates to the field of architecture, and in particular to a steel structure and construction method for a multi-level steel structure spanning a basement floor. It includes multiple vertically distributed first steel columns on the bottom wall of the basement, multiple support mechanisms, and truss floor slabs. Parts of the first steel columns are located inside the basement, while other parts are above ground. Support mechanisms are installed between two first steel columns and are located above ground. These support mechanisms support the top of the first steel columns. Second steel columns are vertically installed at the top of the first steel columns. Multiple truss floor slabs are arranged sequentially from bottom to top. Second steel columns penetrate the truss floor slabs and are fixedly connected to them. Each truss floor slab has multiple steel beams underneath, which are fixedly installed between the tops of two second steel columns. This application has the effect of shortening the construction period.

Description

Technical Field

[0001] This application relates to the field of architecture, and in particular to a steel structure spanning a basement level and a construction method thereof. Background Technology

[0002] The zero slab in a basement generally refers to the basement ceiling. For basements with requirements on the clear height between floors and restrictions on the floor height, the zero slab is usually directly supported by basement columns and basement walls, and there are no crossbeams for reinforcement between the basement columns.

[0003] When constructing a basement, the process typically begins by installing multiple primary steel columns on the inner floor wall. Formwork is then installed around these columns, and concrete is poured to form the basement columns. Next, formwork is erected inside the basement, reinforcing steel is tied, and concrete is poured to form the basement walls. After the columns and walls are completed, a scaffold is erected inside the basement, and reinforcing steel is tied to the top of the scaffold and then poured to form the ground floor slab. Once the ground floor slab is completed, second steel columns are connected to the primary columns based on the number of floors above ground. Truss floor slabs and steel beams are then installed at the locations of the second steel columns on the ceiling of each floor.

[0004] The weight of the second steel column, truss floor slab, and steel beams located above ground is significant. After the weight of the above-ground portion is applied to the first steel column, and because the basement uses a flat slab system, the first steel column lacks supporting beams. After the first and second steel columns connect, the length from the bottom of the first steel column to the steel beam on the first floor is long, making the connection point prone to bending. By constructing the zero-level slab, the basement columns, basement walls, and zero-level slab can support the first steel column, thereby reducing the likelihood of it bending under pressure.

[0005] Regarding the aforementioned technologies, the inventors believe that the construction of basement columns, basement walls, and the zero-level slab requires sequential steps such as tying reinforcing bars, installing formwork, pouring concrete, waiting for the concrete to solidify, and removing the formwork, resulting in a lengthy construction period. Furthermore, the construction of the second steel columns, truss floor slabs, and steel beams above ground can only proceed after the zero-level slab is completed, further extending the construction cycle. Summary of the Invention

[0006] To shorten the construction period, this application provides a steel structure spanning a basement level and a construction method thereof.

[0007] This application provides a steel structure and construction method for a floor-to-ceiling (basement) zero-level slab spanning multiple floors, employing the following technical solution:

[0008] A steel structure spanning a basement level includes multiple vertically distributed first steel columns on the basement floor, multiple support mechanisms, and truss floor slabs. Part of the first steel column is located inside the basement, while another part is above ground. The support mechanism is installed between two first steel columns and is located above ground. The support mechanism supports the top of the first steel column. A second steel column is vertically installed at the top of each first steel column. Multiple truss floor slabs are arranged sequentially from bottom to top. The second steel columns penetrate the truss floor slabs and are fixedly connected to them. Each truss floor slab has multiple steel beams below it, and these beams are fixedly installed between the tops of two second steel columns.

[0009] By adopting the above technical solution, after the first steel column is installed in the basement, a support mechanism is installed between the tops of the two first steel columns for support, thereby reducing the occurrence of bending at the connection between the first and second steel columns. Then, during the construction of the basement columns, basement walls, and zero-level slab, the second steel column, truss floor slab, and steel beams are installed simultaneously, thereby shortening the construction period.

[0010] Optionally, the support mechanism includes a first I-beam and a first connecting assembly located at both ends of the first I-beam. The first connecting assembly includes a connecting plate, a first bolt, and a first nut. The connecting plate is installed on the column body at the top of the first steel column. The first bolt slides through the connecting plate and the waist plate of the first I-beam. The first nut is threaded onto the first bolt. The connecting plate abuts against the upper and lower flanges of the first I-beam.

[0011] By adopting the above technical solution, the first bolt passes through the connecting plate and the first I-beam, and is then tightened, thus facilitating the connection between the first I-beam and the first steel column, thereby shortening the construction period. After the construction of the zero-level plate is completed, when it is necessary to remove the first I-beam, the first nut is unscrewed from the first bolt, and then the first I-beam is separated from the connecting plate.

[0012] Optionally, a rotating rod is provided on the side of the connecting plate near the first steel column. The rod body is fixedly connected to the side of the connecting plate near the first steel column. A rotating sleeve is provided at both ends of the rotating rod. The rotating sleeve is rotatably sleeved on the rotating rod and fixedly installed on the column body of the first steel column. Limiting rings are installed at both ends of the rotating rod, and the rotating sleeve is located between the two limiting rings.

[0013] By adopting the above technical solution, the rotating rod and the rotating sleeve cooperate to facilitate the rotation of the connecting plate on the first steel column. Based on the distribution of the first steel columns on the basement floor wall, some of the first steel columns are staggered, allowing the first I-beam to be inclined between two first steel columns. The rotation of the connecting plate facilitates its contact with the web of the first I-beam, thus facilitating the connection between the connecting plate and the first I-beam.

[0014] Optionally, a second I-beam is provided at both ends of the first I-beam. One end of the second I-beam abuts against the column body of the first steel column, and the other end of the second I-beam abuts against one end of the first I-beam. The connecting plate is provided with a second bolt and a second nut. The second bolt slides through the web of the second I-beam, and the second nut is threaded onto the second bolt. The connecting plate abuts against the upper and lower flanges of the second I-beam.

[0015] By adopting the above technical solution, after the construction of the zero-level slab is completed, the first and second nuts are unscrewed, allowing the first and second H-beams to be removed from the first steel column for recycling. When reusing the first H-beam, the placement of the first steel columns in different basements may vary, potentially altering the distance between adjacent first steel columns, making it impossible for the first steel column to abut against the first steel column. The second H-beam fills the gap between the first H-beam and the first steel column, thus facilitating the reuse of the first H-beam.

[0016] Optionally, the support mechanism includes a reinforcing rod and a second connecting assembly located at both ends of the reinforcing rod. The second connecting assembly includes a first connecting block, a first positioning block, and a stud. The first connecting block is installed on the column body at the bottom end of the first steel column. A threaded groove is provided on the side of the first connecting block away from the first steel column for the stud to be threaded through. The first positioning block is fixedly installed on the end of the stud away from the first connecting block. A first positioning groove is provided on the end face of the reinforcing rod for the first positioning block to pass through. The periphery of the first positioning block abuts against the inner wall of the first positioning groove. Inlet and outlet are provided on the rod body at both ends of the reinforcing rod. The inlet and outlet communicate with the first positioning groove and are used for the first positioning block to enter and exit the first positioning groove.

[0017] By adopting the above technical solution, after the first steel column is installed, the first connecting block is installed on the first steel column. Then, the stud is screwed into the threaded groove, and the reinforcing rod is placed between the two first steel columns, allowing the first positioning block to enter the first positioning groove from the inlet / outlet. Then, the reinforcing rod is rotated, and the first positioning block engages with the inner wall of the first positioning groove, causing the stud to rotate together with the reinforcing rod. The stud is then screwed out of the threaded groove, and the stud drives the first positioning block into the inner bottom wall of the first positioning groove, thus facilitating the installation of the reinforcing rod between the two first steel columns.

[0018] Optionally, the second connecting component further includes a second connecting block and a second positioning block. The second connecting block is fixedly installed on the column body at the top of the first steel column, and the second positioning block is fixedly installed on the side of the second connecting block away from the first steel column. The side of the first connecting block close to the first steel column has a second positioning groove for the second positioning block to be inserted into, and the periphery of the second positioning block abuts against the inner wall of the second positioning groove.

[0019] By adopting the above technical solution, when it is necessary to pour the concrete for the part of the first steel column located on the ground, the reinforcing rod is rotated to allow the stud to be screwed into the threaded groove. Then, the first positioning block slides out from the inlet and outlet, making it easy to remove the reinforcing rod from between the two first steel columns. After removing the reinforcing rod, the second positioning block is pulled out from the second positioning groove, making it easy to remove the first connecting block from the first steel column, thereby facilitating the pouring of the concrete for the part of the first steel column located on the ground.

[0020] Optionally, the reinforcing rod has multiple first reinforcing blocks fixedly installed on its body. The first reinforcing blocks are spaced apart along the length of the reinforcing rod, and the distance between two adjacent first reinforcing blocks gradually increases from the middle to both ends of the reinforcing rod.

[0021] By adopting the above technical solution, the first reinforcing block is used to improve the strength of the reinforcing rod, thereby reducing the occurrence of bending after the two ends of the reinforcing rod are squeezed.

[0022] Optionally, a second reinforcing block is fixedly installed at both ends of the reinforcing rod. An annular groove is formed on the periphery of the second reinforcing block. A suspension rope is provided on the reinforcing block. One end of the suspension rope is fixedly connected to the bottom of the annular groove. The suspension rope is wound inside the annular groove. A counterweight is detachably installed at the other end of the suspension rope. The counterweight applies a steering force to the reinforcing rod to drive the stud out of the groove.

[0023] By adopting the above technical solution, the counterweight applies a steering force to the reinforcing rod to drive the stud out of the screw groove, thereby reducing the occurrence of the stud being screwed into the screw groove due to vibration of the reinforcing rod.

[0024] Optionally, a hook is fixedly installed at the end of the suspension rope away from the second reinforcing block, and a hanging ring is fixedly installed on the counterweight block. The hook is used to hook the hanging ring.

[0025] By adopting the above technical solution, after the reinforcing rod is installed between the two first steel columns, the counterweight is connected to the hanging ring through the hook, which facilitates the installation of the counterweight on the hoisting rope.

[0026] A construction method for a steel structure spanning a basement level slab includes the following steps:

[0027] Install the first steel column on the inner bottom wall of the basement, and install the support mechanism between the two first steel columns;

[0028] After installing formwork around the first steel column (1), concrete is poured to form the basement column. In the basement, formwork is erected, steel bars are tied, and concrete is poured to form the basement wall.

[0029] A scaffold is erected inside the basement, and then steel bars are tied to the top side of the scaffold and poured to form a zero slab.

[0030] During the construction of the basement columns, basement walls and zero-level slab, the second steel column (2) is installed on the first steel column (1) simultaneously, and the steel beam (12) and truss floor slab (11) are installed on the second steel column (2); after the construction of the zero-level slab is completed, the support mechanism (6) is removed.

[0031] By adopting the above technical solution, the second steel column, steel beam and truss floor slab can be installed simultaneously during the construction of basement columns, basement walls and zero-level slab, thereby shortening the construction period.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. By installing a support mechanism between the tops of the two first steel columns, it is possible to carry out the construction of the underground and above-ground parts of the building simultaneously after the first steel columns are installed, thereby shortening the construction cycle;

[0034] 2. After the first bolt passes through the first I-beam and the connecting plate, the first nut is screwed into the first bolt, thereby installing the first I-beam between the two first steel columns. The installation speed is fast, thus shortening the construction cycle. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0036] Figure 2 yes Figure 1 Enlarged view at point A;

[0037] Figure 3 This is a partial structural schematic diagram of Embodiment 1 of this application;

[0038] Figure 4 This is an exploded view of the connection plate and the first steel column in Embodiment 1 of this application;

[0039] Figure 5 This is a schematic diagram of the misaligned structure of the two first steel columns in Embodiment 1 of this application;

[0040] Figure 6 This is a partial structural diagram of Embodiment 2 of this application;

[0041] Figure 7 This is a partial structural schematic diagram of Embodiment 3 of this application;

[0042] Figure 8 This is a cross-sectional view of Embodiment 3 of this application;

[0043] Figure 9 yes Figure 8 Enlarged view at point B.

[0044] Explanation of reference numerals in the attached drawings: 1. First steel column; 2. Second steel column; 3. First positioning groove; 4. Second positioning groove; 5. Threaded groove; 6. Support mechanism; 61. First I-beam; 62. First connecting assembly; 621. Connecting plate; 622. First bolt; 623. First nut; 63. Reinforcing rod; 64. Second connecting assembly; 641. First connecting block; 642. Second connecting block; 643. First positioning block; 644. Second positioning block; 645. Threaded stud; 7. Rotating rod; 8. Rotating sleeve; 9. Limiting ring; 10. Hanging ring; 11. Truss floor slab; 12. Steel beam; 13. Second I-beam; 14. Second bolt; 15. Second nut; 16. Inlet / outlet; 17. First reinforcing block; 18. Second reinforcing block; 19. Ring groove; 20. Lifting rope; 21. Counterweight; 22. Hook. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0046] Example 1.

[0047] This application discloses a steel structure spanning a basement level and its construction method.

[0048] Reference Figure 1 A steel structure spanning a basement level includes multiple vertically distributed first steel columns 1 on the basement floor. Part of the first steel column 1 is located inside the basement, while another part extends upwards above the ground, thus making the top of the first steel column 1 higher than the ground level.

[0049] Reference Figure 1 It also includes multiple support mechanisms 6, which are installed between the tops of the two first steel columns 1. The first steel columns 1 are located in the basement, and each of the first steel columns 1 and its adjacent surrounding steel columns has a support mechanism 6. In this embodiment, the support mechanism 6 is located 0.5 meters above the ground.

[0050] Reference Figure 2 , Figure 3 The support mechanism 6 includes a first I-beam 61 and a first connecting component 62 located at both ends of the first I-beam 61.

[0051] Reference Figure 3 , Figure 4The first connecting assembly 62 includes a connecting plate 621, a first bolt 622, and a first nut 623. One side of the connecting plate 621 is hinged to the top of the first steel column 1. A rotating rod 7 is provided on the side of the connecting plate 621 near the first steel column 1, and the rod body of the rotating rod 7 is fixedly connected to the side of the connecting plate 621 near the first steel column 1. The rotating rod 7 is vertically arranged. Rotating sleeves 8 are provided at both ends of the rotating rod 7, and the rotating sleeves 8 are rotatably fitted onto the rotating rod 7. The rotating sleeves 8 are fixedly installed on the column body of the first steel column 1. In this embodiment, the rotating sleeves 8 are installed on the column body of the first steel column 1 by welding. Limiting rings 9 are installed at both ends of the rotating rod 7, and the rotating sleeve 8 is located between the two limiting rings 9.

[0052] The rotating rod 7 rotates inside the rotating sleeve 8, thus facilitating the hinged connection of the connecting plate 621 to the top of the first steel column 1. When it is necessary to cast the floor column of the first steel column 1 on the ground, the rotating connecting plate 621 fits against the column body of the first steel column 1, thereby reducing the possibility of the connecting plate 621 affecting the casting of the floor column.

[0053] Reference Figure 3 , Figure 4 The first bolt 622 slides through the waist plate of the connecting plate 621 and the first I-beam 61, the first nut 623 is threaded onto the first bolt 622, and the connecting plate 621 abuts against the upper and lower flanges of the first I-beam 61.

[0054] The first I-beam 61 is pre-drilled during production to allow the first bolt 622 to pass through. After the first I-beam 61 is placed between the two first steel columns 1, the connecting plate 621 is rotated to fit against the web of the first I-beam 61. The connecting plate 621 supports the upper and lower flanges, thus temporarily mounting the first I-beam 61 between the two first steel columns 1. While the connecting plate 621 is fitted against the web of the first I-beam 61, holes are drilled in the connecting plate 621 for the first bolt 622 to pass through. Using the first bolt 622 passing through the connecting plate 621 and the web of the first I-beam 61, the first nut 623 is screwed into the first bolt 622, facilitating the installation of the first I-beam 61 between the two first steel columns 1.

[0055] Reference Figure 3 , Figure 4 The first steel column 1 is supported between the two first steel columns 1, thereby reducing the occurrence of bending of the first steel column 1 after being squeezed, and thus facilitating the simultaneous construction of the above-ground and underground buildings after the first steel column 1 is installed, shortening the construction cycle.

[0056] Reference Figure 1A second steel column 2 is vertically installed at the top of the first steel column 1. After the second steel column 2 is placed at the top of the first steel column 1, the first steel column 1 and the second steel column 2 are first fixed with fasteners, and then the first steel column 1 and the second steel column 2 are welded together.

[0057] Reference Figure 1 It also includes multiple truss floor slabs 11. Each floor of the above-ground building corresponds to one truss floor slab 11. The truss floor slab 11 is located in the ceiling of each floor. The second steel column 2 is fixedly inserted through the truss floor slab 11. Each truss floor slab 11 has multiple steel beams 12 below it, and the steel beams 12 are fixedly installed between the columns of the two second steel columns 2.

[0058] Due to the location of the first steel columns 1 in the basement, some of the first steel columns 1 will be staggered, thus requiring the first I-beam 61 to be installed at an angle between the two first steel columns 1. When the first I-beam 61 is installed at an angle, the connecting plate 621 is rotated, and the connecting plate 621 fits against the waist plate of the first I-beam 61, thereby facilitating the installation of the first I-beam 61 between the two first steel columns 1.

[0059] Reference Figure 1 A construction method for a steel structure spanning a basement level slab, using a steel structure spanning a basement level slab according to an embodiment of this application, includes the following steps:

[0060] Step S101: Install the first steel column 1 on the inner bottom wall of the basement, and install the support mechanism 6 between the two first steel columns 1. Then proceed to step S102.

[0061] Step S102: After installing formwork around the first steel column 1, pour concrete to form the basement column. Then, erect formwork in the basement, tie reinforcing bars, and pour concrete to form the basement wall. Then proceed to step S103.

[0062] Step S103: Erect a scaffold inside the basement, then tie steel bars to the top side of the scaffold and pour concrete to form a zero slab.

[0063] During steps S102 and S103, the second steel column 2 is simultaneously installed on the first steel column 1, and the steel beam 12 and truss floor slab 11 are installed on the second steel column 2. After the construction of the zero-level slab is completed, the support mechanism 6 is removed.

[0064] The implementation principle of this application's embodiment of a cross-basement zero-slab steel structure and construction method is as follows: After the first steel column 1 is installed on the inner bottom wall of the basement, formwork needs to be erected inside the basement, reinforcement bars tied, and then the basement columns, basement walls, and zero-slab poured are formed. A support mechanism 6 supports the top of the two first steel columns 1, thereby reducing the likelihood of bending and breakage at the connection between the first steel column 1 and the second steel column 2. Subsequently, construction workers can simultaneously construct the basement and the above-ground building, thus shortening the construction period.

[0065] After the basement construction is completed, the first I-beam 61 is removed from between the two first steel columns 1. Then the connecting plate 621 is rotated and attached to the first steel column 1, which facilitates the pouring of the part of the first steel column 1 located on the ground to form the floor column.

[0066] Example 2.

[0067] This application discloses a steel structure spanning a basement level and its construction method.

[0068] Reference Figure 6 The difference between this embodiment of the application and the previous embodiment of the cross-basement zero-level slab steel structure is that a second I-beam 13 is provided at both ends of the first I-beam 61. One end of the second I-beam 13 abuts against the column body of the first steel column 1, and the other end of the second I-beam 13 abuts against one end of the first I-beam 61. A connecting plate 621 is provided with a second bolt 14 and a second nut 15. The second bolt 14 slides through the web of the second I-beam 13. The second nut 15 is threaded onto the second bolt 14, and the connecting plate 621 abuts against the upper and lower flanges of the second I-beam 13.

[0069] The first bolt 622 passes through the web of the first I-beam 61, and then the first nut 623 is screwed into the first bolt 622, thereby installing the first I-beam 61 between the two first steel columns 1. The second bolt 14 passes through the web of the second I-beam 13, and then the second nut 15 is screwed into the second bolt 14, thereby installing the second I-beam 13 between the first I-beam 61 and the first steel column 1.

[0070] When it is necessary to remove the first I-beam 61 and the second I-beam 13, unscrew the first nut 623 and the second nut 15, and then pull out the first bolt 622 and the second bolt 14, so as to facilitate the removal of the first I-beam 61 and the second I-beam 13.

[0071] The implementation principle of the steel structure and construction method for a cross-basement zero-level slab in this application is as follows: After the first steel column 1 is installed in the basement, a first I-beam 61 is selected according to the distance between the two first steel columns 1, and the length of the first I-beam 61 is less than the distance between the two first steel columns 1. Then, a second I-beam 13 is placed between the first I-beam 61 and the first steel column 1, so that the first steel column 1 can be bent and then the second I-beam 13 can compress the first I-beam 61.

[0072] After the construction of the zero-level slab is completed, the support structure 6 needs to be removed and the first I-beam 61 needs to be recycled. The distribution of the first steel columns 1 varies in different basements, resulting in different distances between the two first steel columns 1. The two ends of the first I-beam 61 are abutted against the first steel column 1 by second I-beams 13, thus facilitating the use of the first I-beam 61 in different basements.

[0073] Example 3.

[0074] This application discloses a steel structure spanning a basement level and its construction method.

[0075] Reference Figure 7 , Figure 8 , Figure 9 The difference between the steel structure of the basement zero-level slab in this application embodiment and that in embodiment 1 is that the support mechanism 6 includes a reinforcing rod 63 and a second connecting component 64 located at both ends of the reinforcing rod 63. The second connecting component 64 includes a first connecting block 641, a second connecting block 642, a first positioning block 643, a second positioning block 644 and a stud 645.

[0076] Reference Figure 8 , Figure 9 The second connecting block 642 is fixedly installed on the top of the first steel column 1, and the second positioning block 644 is fixedly installed on the side of the second connecting block 642 away from the first steel column 1. In this embodiment, the second connecting block 642 is fixedly installed on the first steel column 1 by welding, and the second positioning block 644 and the second connecting block 642 are integrally formed during production. A second positioning groove 4 is provided on one side of the first connecting block 641 for the second positioning block 644 to pass through for damping. The periphery of the second positioning block 644 abuts against the inner wall of the second positioning groove 4, and the second positioning block 644 is rectangular. Through the cooperation of the second positioning groove 4 and the second positioning block 644, the first connecting block 641 is conveniently installed on the first steel column 1.

[0077] Reference Figure 8 , Figure 9The first connecting block 641 has a threaded groove 5 on the side away from the first steel column 1 for the threaded stud 645 to pass through. The first positioning block 643 is fixedly installed on the end of the stud 645 away from the first connecting block 641. The end face of the reinforcing rod 63 has a first positioning groove 3 for the first positioning block 643 to pass through. The periphery of the first positioning block 643 abuts against the inner wall of the first positioning groove 3. The first positioning block 643 is rectangular. The rod body at both ends of the reinforcing rod 63 has inlet and outlet 16, which communicate with the first positioning groove 3. The inlet and outlet 16 are used for the first positioning block 643 to enter and exit the first positioning groove 3.

[0078] Reference Figure 8 , Figure 9 After installing the second connecting block 642 onto the first steel column 1, insert the second positioning block 644 into the second positioning groove 4, thereby installing the first connecting block 641 onto the first steel column 1. When the first connecting block 641 is installed onto the first steel column 1, the stud 645 is screwed into the threaded groove 5. Then, the reinforcing rod 63 is placed between the two first steel columns 1, allowing the first positioning block 643 to enter the first positioning groove 3 from the inlet / outlet 16. The reinforcing rod 63 is then rotated, engaging with the inner bottom wall of the first positioning groove 3 via the first positioning block 643, thus causing the reinforcing rod 63 to rotate the stud 645. The stud 645 is then removed from the threaded groove 5, after which the stud 645 drives the first positioning block 643 to press tightly against the bottom of the first positioning groove 3, thereby supporting the reinforcing rod 63 between the two first steel columns 1.

[0079] When it is necessary to remove the reinforcing rod 63 from between the two first steel columns 1, rotate the reinforcing rod 63 to allow the stud 645 to be screwed into the threaded groove 5. Then, the first positioning block slides out from the inlet / outlet 16, making it easy to remove the reinforcing rod 63 from between the two first steel columns 1. Then, the second positioning block 644 moves out from the second positioning groove 4, making it easy to remove the first connecting block 641 from the first steel column 1, thereby facilitating the casting of the ground-level portion of the first steel column 1 to form the floor column.

[0080] Reference Figure 8 , Figure 9 Multiple first reinforcing blocks 17 are fixedly installed on the body of the reinforcing rod 63, and the first reinforcing blocks 17 are spaced apart along the length of the reinforcing rod 63. The distance between two adjacent first reinforcing blocks 17 gradually increases from the middle to both ends of the reinforcing rod 63. When the reinforcing rod 63 supports two first steel columns 1, the first steel columns 1 compress the reinforcing rod 63, and the first reinforcing blocks 17 improve the bending resistance of the reinforcing rod 63, thereby reducing the occurrence of bending of the reinforcing rod 63 under the compression of the first steel columns 1.

[0081] Reference Figure 8 , Figure 9Both ends of the reinforcing rod 63 are fixedly mounted with second reinforcing blocks 18, and the circumference of the second reinforcing blocks 18 is provided with annular grooves 19. A suspension rope 20 is provided on the reinforcing block, one end of which is fixedly connected to the bottom of the annular groove 19, and the suspension rope 20 is wound inside the annular groove 19. The other end of the suspension rope 20 is provided with a counterweight 21, a hook 22, and a hanging ring 10. The end of the suspension rope 20 away from the second reinforcing block 18 is fixedly connected to the hook 22, and the hanging ring 10 is fixedly mounted on the counterweight 21. The hook 22 is used to hook the hanging ring 10. The counterweight 21 applies a steering force to the reinforcing rod 63 to drive the stud 645 out of the threaded groove 5.

[0082] During construction, the reinforcing rod 63 may vibrate. The counterweight 21 applies a directional force to the reinforcing rod 63 to drive the stud 645 out of the screw groove 5, thereby reducing the occurrence of the stud 645 spinning into the screw groove 5, and thus facilitating the first positioning block 643 to press against the bottom of the first positioning groove 3.

[0083] The implementation principle of the steel structure and construction method for a cross-basement zero-level slab in this application embodiment is as follows: after rotating the reinforcing rod 63, the reinforcing rod 63 drives the studs 645 at both ends to rotate together, thereby facilitating the installation of the reinforcing rod 63 between the two first steel columns 1, or the removal of the reinforcing rod 63 from between the two first steel columns 1, thereby shortening the construction period.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cross-basement positive-negative zero plate jump layer steel structure, characterized in that: The system includes multiple vertically distributed first steel columns (1) on the bottom wall of the basement, multiple support mechanisms (6) and truss floor slabs (11). Part of the first steel column (1) is located inside the basement, and the other part of the first steel column (1) is located on the ground. The support mechanism (6) is installed between two first steel columns (1) and is located on the ground. The support mechanism (6) is used to support the column body at the top of the first steel column (1). A second steel column (2) is vertically installed at the top of the first steel column (1). Multiple truss floor slabs (11) are arranged sequentially from bottom to top. The second steel column (2) passes through the truss floor slab (11) and is fixedly connected to the truss floor slab (11). Each truss floor slab (11) has multiple steel beams (12) below it. The steel beams (12) are fixedly installed between the column bodies of two second steel columns (2).

2. A cross-basement positive-negative zero plate jump layer steel structure according to claim 1, characterized in that: The support mechanism (6) includes a first I-beam (61) and a first connecting assembly (62) located at both ends of the first I-beam (61). The first connecting assembly (62) includes a connecting plate (621), a first bolt (622) and a first nut (623). The connecting plate (621) is installed on the column body at the top of the first steel column (1). The first bolt (622) slides through the connecting plate (621) and the waist plate of the first I-beam (61). The first nut (623) is threaded onto the first bolt (622). The connecting plate (621) abuts against the upper and lower flanges of the first I-beam (61).

3. A cross-basement positive-negative zero plate jump layer steel structure according to claim 2, characterized in that: A rotating rod (7) is provided on the side of the connecting plate (621) near the first steel column (1). The rod body of the rotating rod (7) is fixedly connected to the side of the connecting plate (621) near the first steel column (1). A rotating sleeve (8) is provided at both ends of the rotating rod (7). The rotating sleeve (8) is rotatably sleeved on the rotating rod (7). The rotating sleeve (8) is fixedly installed on the column body of the first steel column (1). Limiting rings (9) are installed at both ends of the rotating rod (7). The rotating sleeve (8) is located between the two limiting rings (9).

4. The steel structure of claim 2, wherein: The first I-beam (61) has a second I-beam (13) at both ends. One end of the second I-beam (13) abuts against the column body of the first steel column (1), and the other end of the second I-beam (13) abuts against one end of the first I-beam (61). The connecting plate (621) is provided with a second bolt (14) and a second nut (15). The second bolt (14) slides through the waist plate of the second I-beam (13), and the second nut (15) is threaded onto the second bolt (14). The connecting plate (621) abuts against the upper and lower flanges of the second I-beam (13).

5. The steel structure of claim 1, wherein: The support mechanism (6) includes a reinforcing rod (63) and a second connecting assembly (64) located at both ends of the reinforcing rod (63). The second connecting assembly (64) includes a first connecting block (641), a first positioning block (643), and a stud (645). The first connecting block (641) is installed on the column body at the bottom end of the first steel column (1). A threaded groove (5) for the stud (645) to be threaded through is opened on the side of the first connecting block (641) away from the first steel column (1). The first positioning block (643) is fixed. Installed on the end of the stud (645) away from the first connecting block (641), the end face of the reinforcing rod (63) is provided with a first positioning groove (3) for the first positioning block (643) to pass through. The periphery of the first positioning block (643) abuts against the inner side wall of the first positioning groove (3). The rod body at both ends of the reinforcing rod (63) is provided with inlet and outlet (16). The inlet and outlet (16) are connected to the first positioning groove (3). The inlet and outlet (16) are used for the first positioning block (643) to enter and exit the first positioning groove (3).

6. A cross-basement positive-negative zero plate jump layer steel structure according to claim 5, characterized in that: The second connecting component (64) further includes a second connecting block (642) and a second positioning block (644). The second connecting block (642) is fixedly installed on the column body at the top of the first steel column (1). The second positioning block (644) is fixedly installed on the side of the second connecting block (642) away from the first steel column (1). The first connecting block (641) has a second positioning groove (4) on the side close to the first steel column (1) for the second positioning block (644) to be inserted into. The periphery of the second positioning block (644) abuts against the inner wall of the second positioning groove (4).

7. A cross-basement positive-negative zero plate jump layer steel structure according to claim 5, characterized in that: The reinforcing rod (63) has multiple first reinforcing blocks (17) fixedly installed on its body. The first reinforcing blocks (17) are spaced apart along the length of the reinforcing rod (63), and the distance between two adjacent first reinforcing blocks (17) gradually increases from the middle to both ends of the reinforcing rod (63).

8. A cross-basement positive-negative zero plate jump layer steel structure according to claim 5, characterized in that: Both ends of the reinforcing rod (63) are fixedly installed with second reinforcing blocks (18). The second reinforcing block (18) has an annular groove (19) on its periphery. The reinforcing block is provided with a lifting rope (20). One end of the lifting rope (20) is fixedly connected to the bottom of the annular groove (19). The lifting rope (20) is wound inside the annular groove (19). The other end of the lifting rope (20) is detachably installed with a counterweight (21). The counterweight (21) applies a turning force to the reinforcing rod (63) to drive the stud (645) to rotate out of the screw groove (5).

9. A cross-basement positive-negative zero plate jump layer steel structure according to claim 8, characterized in that: The end of the suspension rope (20) away from the second reinforcing block (18) is fixedly equipped with a hook (22), and the counterweight block (21) is fixedly equipped with a hanging ring (10). The hook (22) is used to hook the hanging ring (10).

10. A construction method of a cross-basement positive-negative zero plate jump layer steel structure, characterized in that, The steel structure for a basement floor spanning the zero-level slab as described in any one of claims 1-9 includes the following steps: Installing a first steel column on the inner bottom wall of the basement and installing a support mechanism between the two first steel columns; After installing formwork around the first steel column (1), pouring concrete to form the basement column; tying reinforcing bars and pouring concrete in the basement to form the basement wall; Erecting a scaffold inside the basement, then tying reinforcing bars on the top side of the scaffold and pouring concrete to form the zero-level slab; During the construction of the basement column, basement wall and zero-level slab, simultaneously installing a second steel column (2) on the first steel column (1), and installing a steel beam (12) and a truss floor slab (11) on the second steel column (2); After the construction of the zero-level slab is completed, removing the support mechanism (6).

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