A method for rapid installation of embedded prefabricated steel structure stairs

Abstract

The present application discloses a method for the embedded rapid installation of assembled steel structure stairs. Before the construction of the roof slab, two roof slab beams are installed above the stair installation space, and multiple steel beams are installed between the two roof slab beams. A hoist is installed on the steel beam, and the hoist can move along the steel beam; then the casting template of the roof slab is installed, and the roof slab is constructed; after the construction of the roof slab is completed, the stairs are hoisted by hoisting, and the two ends of the stairs are manually placed on the floors on both sides of the stair installation space to the corresponding installation positions on the floors, and the two ends of the stairs are fixed; the same method is used to hoist the remaining stairs to the corresponding positions in turn; after all the stairs are hoisted, the hoist is removed. The present application has the effect of facilitating the hoisting of stairs.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure staircase hoisting, and in particular to an embedded rapid installation construction method for assembled steel structure staircases. Background Art

[0002] With the development of society, the design of structures of various buildings is getting higher and higher, and the emergence of new structures often brings challenges in manufacturing or installation. In the buildings with relevant designs, a multi-story high stair installation space is reserved under the roof slab. There are no supporting structures such as columns and beams in the stair installation space. The multi-story stairs designed from bottom to top are staggered from outside to inside in sequence. The higher the stairs are, the deeper they are. Moreover, the stairs are prefabricated with steel structures and need to be hoisted after the main construction of the building is completed. However, after the main construction of the building is completed, the roof slab hinders the use of the crane, making it difficult to hoist the stairs.

[0003] With respect to the above-mentioned related technologies, the applicant believes that the following defects exist: after the main building construction is completed, it is difficult to hoist the stairs. Summary of the invention

[0004] In order to facilitate the hoisting of stairs, the present application provides an embedded rapid installation construction method for assembled steel structure stairs.

[0005] The present application provides a method for the embedded rapid installation of assembled steel structure stairs using the following technical solutions:

[0006] A method for embedded rapid installation of assembled steel structure stairs, comprising the following steps:

[0007] Before the construction of the roof slab, two roof slab beams are installed above the stair installation space, and multiple steel beams are installed between the two roof slab beams. Hangers are installed on the steel beams, and the hangers can move along the steel beams. Then, the casting formwork of the roof slab is installed, and the roof slab is constructed;

[0008] After the roof slab construction is completed, the staircase is hoisted with a hoist, and the two ends of the staircase are manually placed on the floors on both sides of the staircase installation space to the corresponding installation positions on the floor, and the two ends of the staircase are fixed; the remaining staircases are hoisted to the corresponding positions in turn using the same method;

[0009] After all stair lifting is completed, remove the lifting equipment.

[0010] By adopting the above technical solution, since there are no supporting structures such as columns and beams in the stair installation space, the roof slab above the stair installation space needs to be supported by structures such as beams. The present application arranges roof slab beams and steel beams to support the roof above the stair installation space, and the hoists are installed on the steel beams. The stairs are hoisted using the roof slab beams and steel beams. The hoisting of the stairs is not affected by the roof slab, the stairs can be installed quickly, and the installation efficiency of the stairs is improved.

[0011] Preferably, during the construction of the main building, steel beams are installed on the floors on both sides of the stair installation space in alignment with the positions of the two ends of the stairs as crossbeams of the floors. After the stairs are hoisted into place, the steel beams are welded at both ends of the stairs, and then the floor panels of the floors on both sides of the stair installation space are constructed, and the floor panels cover both ends of the stairs.

[0012] By adopting the above technical scheme, since the hoisting of the stairs utilizes the top plate cross beam and the steel beam as support, when the load of the top plate cross beam and the steel beam exceeds a certain value, the top plate cross beam and the steel beam will be damaged, so the length of the stairs is shortened to reduce the load of the top plate cross beam and the steel beam. However, shortening the length of the stairs shortens the lap length of the stairs and the floor slab, resulting in reduced stability of the stairs. During the construction of the main building, the present application installs steel beams as cross beams on the floors on both sides of the stair installation space, and then welds the stairs to the steel beams after the stairs are hoisted to improve the stability of the stairs. By installing steel beams as cross beams on the floors on both sides of the stair installation space, the length of the stairs can be shortened to a set value without affecting the stability of the stairs after installation. In addition, since the stair installation space is small, the stairs are easier to hoist after being shortened.

[0013] Preferably, the top plate cross beam is a steel beam, the steel beam is welded to the top plate cross beam, and a steel plate is installed above the top plate cross beam and the steel beam as a casting template for the roof slab above the stair installation space. The steel plates are welded to the steel beam and the top plate cross beam respectively. After the hoist is removed, the top plate cross beam, longitudinal beam and steel plate are treated with rust prevention.

[0014] By adopting the above technical scheme, the top plate cross beam is a steel beam, which can facilitate the hoisting of the top plate cross beam and the installation of the steel beam. The steel beam and the top plate cross beam are welded, which has good firmness and large bearing capacity. The steel plate is used as a casting template for the roof slab, and there is no need to set up scaffolding in the stair installation space for the construction of the roof slab, thereby reducing the workload of the roof slab construction. After the roof slab is cast, the steel plate is not removed, and continues to provide a certain support force for the roof slab, while improving the connection stability between the steel beam and the top plate cross beam.

[0015] Preferably, connecting steel bars are welded to the tops of the steel beams and the top plate cross beams respectively, and the connecting steel bars are avoided when the steel plates are installed. When the roof plate is constructed, the roof plate steel bars are tied and fixed to the connecting steel bars.

[0016] By adopting the above technical solution, the bearing capacity of the steel beams and the top plate cross beams is improved by connecting the steel bars and the roof slab steel bars and tying them together, so that the steel beams and the top plate cross beams can withstand greater loads and reduce the risk of deformation of the steel beams and the top plate cross beams when hoisting the stairs.

[0017] Preferably, two sets of hoists are provided, and the two sets of hoists are respectively installed on two different steel beams, and each section of stairs is hoisted by two sets of hoists.

[0018] By adopting the above technical solution, the angle of the stairs can be adjusted by adjusting the heights of the two sets of hoisting devices to lift the stairs respectively. During the ascending process of the stairs, the stairs are made close to the vertical direction. After the stairs rise to the set height, one end of the stairs is lowered first, and the lowered end of the stairs is rotated and lowered into the floor, so that the stairs can enter the floor easily. Similarly, the same method is used to place the other end of the stairs into the floor on the other side to complete the positioning of the stairs, which is convenient and quick.

[0019] Preferably, the lifting device comprises an electric vehicle and an electric hoist, wherein the electric vehicle is installed on the steel beam and can move along the steel beam, and the electric hoist is installed on the electric vehicle.

[0020] By adopting the above technical solution, the electric vehicle drives the electric hoist to move along the steel beam, thereby driving the stairs to move to the required position, avoiding the interference of the first installed stairs with the later hoisted stairs.

[0021] Preferably, after all the stairs are hoisted, a construction platform is set up based on the main body of the building and the installed stairs, and the workers remove the hoists on the construction platform.

[0022] By adopting the above technical solution, after the stairs are hoisted, the distance between the upper stairs and the roof slab is closer, and the installed stairs have a higher bearing capacity. Relying on the stairs and the main body of the building can reduce the workload of building the construction platform.

[0023] Preferably, when the hoist lifts the stairs, the distance between the stairs and the building main body on both sides of the stair installation space is 20cm-50cm.

[0024] By adopting the above technical solution, if the distance between the stairs and the main building on both sides of the stair installation space is small, collision is likely to occur, and if the distance between the stairs and the main building on both sides of the stair installation space is large, it is not conducive to pulling the stairs into the floor.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Since there are no supporting structures such as columns and beams in the stair installation space, the roof slab above the stair installation space needs to be supported by beams and other structures. In this application, roof slab beams and steel beams are provided to support the roof above the stair installation space, and the hoisting device is installed on the steel beam. The staircase is hoisted by the roof slab beams and steel beams. The hoisting of the staircase is not affected by the roof slab, and the staircase can be installed quickly, thereby improving the installation efficiency of the staircase.

[0027] 2. During the main building construction process, the present application installs steel beams as cross beams on the floors on both sides of the stair installation space, and then welds the stairs and the steel beams together after the stairs are hoisted to improve the stability of the stairs; by installing steel beams as cross beams on the floors on both sides of the stair installation space, the length of the stairs can be shortened to a set value without affecting the stability of the stairs after installation. In addition, since the stair installation space is small, the stairs are easier to hoist after being shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the building body of an embodiment of the present application.

[0029] Figure 2 It is another structural schematic diagram of the building body of the embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the hoisting of the stairs of an embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of the structure after the staircase hoisting is completed in the embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. Building main body; 11. Roof slab; 12. Roof slab beam; 13. Steel beam; 14. Steel plate; 15. Steel beam; 2. Hoisting equipment; 3. Stairs. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiment of the present application discloses a method for rapid embedded installation construction of an assembled steel structure staircase.

[0036] A method for embedded rapid installation of assembled steel structure stairs, comprising the following steps:

[0037] Reference Figure 1 and Figure 2, construct the main building 1, and replace the crossbeams at the two ends of the designed staircase 3 on each floor of the main building 1 on both sides of the designed staircase installation space with steel beams 15. When the main building 1 is constructed to the roof 11, two top plate crossbeams 12 parallel to each other are installed above the staircase installation space. The top plate crossbeams 12 are steel beams 15. The two top plate crossbeams 12 span the top of the staircase installation space. The top plate crossbeams 12 are cast together with the main beams of the main building 1 on both sides of the staircase installation space and supported on the main beams of the main building 1 on both sides of the staircase installation space. A plurality of parallel steel beams 13 are installed between the two top plate crossbeams 12. The steel beams 13 are perpendicular to the top plate crossbeams 12. Two top plate crossbeams 12 are welded at both ends of the steel beams 13. A hanger 2 is installed on the steel beams 13, and the hanger 2 can move along the steel beams 13. Connecting steel bars are welded to the top of the steel beam 13 and the top plate cross beam 12, respectively. A steel plate 14 is installed above the top plate cross beam 12 and the steel beam 13 as a casting template for the roof slab 11 above the stair installation space. The steel plate 14 avoids the connecting steel bars when installing. The steel plate 14 is welded to the steel beam 13 and the top plate cross beam 12, respectively. In addition, after the steel plate 14 is installed, connecting steel bars are also welded to the top of the steel plate 14. During the construction of the roof slab 11, the steel bars of the roof slab 11 are tied and fixed with the connecting steel bars, and then the concrete of the roof slab 11 is poured. The connecting steel bars connect the steel beam 13, the top plate cross beam 12, the steel plate 14, and the roof slab 11 into a whole, thereby improving the bearing capacity of the steel beam 13 and the top plate cross beam 12, thereby reducing the risk of subsequently using the steel beam 13 and the top plate cross beam 12 as the load-bearing structure to hoist the stairs 3. In addition, by tying the connecting steel bars to the steel bars of the roof slab 11, the stability of the steel plate 14 can be improved. After tying the steel bars of the roof slab 11, it is convenient for workers to walk above the steel plate 14 and pour concrete.

[0038] Reference Figure 3 and Figure 4, after the strength of the roof slab 11 reaches the design requirements, start to hoist the stairs 3, first hoist the lowest stairs 3, and then hoist the other stairs 3 from bottom to top. Specific hoisting process: first transport the stairs 3 to the ground below the outer end of the steel beam 13, and then use the wire rope to tie the stairs 3 according to the designed binding position. Preferably, a plurality of lifting ears for binding the wire rope are welded on the stairs 3 to ensure that the wire rope is firmly and reliably tied. Then control the hook of the sling 2 to descend, connect the hook of the sling 2 with the wire rope, start the sling 2 to lift the stairs 3 20 cm from the ground, and keep the stairs 3 stable in this position. Measure whether the angle of the stairs 3 is within the designed range. If not, control the sling 2 to lower the stairs 3 to the ground, readjust the position of the wire rope, and start the sling 2 again to lift the stairs 3 20 cm from the ground until the angle of the stairs 3 is within the designed range. Then start the hoist 2 to lift the stair 3 to the designed height, manually pull the lower end of the stair 3 into the floor on both sides of the stair installation space, then control the hoist 2 to slowly lower the stair 3, and manually assist in positioning the lower end of the stair 3 until the lower end of the stair 3 is placed in the corresponding installation position on the floor. After that, the workers on the floor on the opposite side pull the upper end of the stair 3 into the floor, then control the hoist 2 to slowly lower the stair 3, and manually assist in positioning the upper end of the stair 3 until the upper end of the stair 3 is placed in the corresponding installation position on the floor. After the stair 3 is placed in place, weld the two ends of the stair 3 to the steel beams 15 in the floors on both sides of the stair installation space, so that the stair 3 is fixedly connected to the steel beams 15 on both sides, improve the stability of the stair 3, and complete the lifting of a section of the stair 3. Use the same method to lift the remaining stair 3 to the corresponding positions in turn.

[0039] After all the stairs 3 are hoisted, a construction platform is set up based on the building main body 1 and the uppermost stairs 3. The workers remove the hoisting tools 2 on the construction platform and perform anti-rust treatment on the top plate cross beams 12, longitudinal beams and steel plates 14.

[0040] After the staircase 3 is hoisted, the floor panels of the floors on both sides of the staircase installation space are cast. The floor panels cover both ends of the staircase 3 and the steel beam 15, which can not only improve the stability of the staircase 3, but also hide the two ends of the staircase 3, making the staircase 3 more beautiful.

[0041] It should be noted that the method for measuring whether the angle of the staircase 3 in this embodiment is within the designed range is: use a ruler to measure the gaps between the two ends of the staircase 3 and the main building 1 on both sides of the staircase installation space. If the gaps at both ends of the staircase 3 are within the range of 20-50 cm, it means that the angle of the staircase 3 is within the designed range. If the gap at least at one end of the staircase 3 is not within the range of 20-50 cm, it means that the angle of the staircase 3 is not within the designed range. When the gap between the staircase 3 and the main building 1 on one side of the staircase installation space is less than 20 cm, the staircase 3 is easy to collide with the main building 1 during the lifting of the staircase 3, and the risk of damage to the staircase 3 or the main building 1 is high. When the gap between the staircase 3 and the main building 1 on one side of the staircase installation space is greater than 50 cm, it is not easy for workers to pull the staircase 3 into the floor, and the operation is inconvenient.

[0042] In another embodiment, two sets of slings 2 are provided, and the two sets of slings 2 are respectively installed on two different steel beams 13. Each section of staircase 3 is hoisted by two sets of slings 2, and the two sets of slings 2 are respectively connected to the two ends of the staircase 3. During hoisting, the height of the staircase 3 hoisted by the two sets of slings 2 can be adjusted to adjust the angle of the staircase 3, and there is no need to manually pull the staircase 3. By controlling the height of the staircase 3 hoisted by the two sets of slings 2, the two ends of the slings 2 can be put into the floor, which is convenient for operation. The sling 2 includes an electric vehicle and an electric hoist. The electric vehicle is installed on the steel beam 13 and can move along the steel beam 13. The electric hoist is installed on the electric vehicle. The electric vehicle drives the electric hoist to move along the steel beam 13, thereby driving the staircase 3 to move to the required position, avoiding the interference of the first hoisted staircase 3 on the later hoisted staircase 3.

[0043] The implementation principle of the embedded rapid installation construction method of an assembled steel structure staircase in the embodiment of the present application is as follows: the plate cross beams and steel beams 13 of the top plate cross beams 12 and steel beams 13 of the present embodiment serve as the supporting structure of the roof slab 11 above the stair installation space, and also as the bearing structure for hoisting the staircase 3. The hoist 2 is installed on the steel beams 13. The hoisting of the staircase 3 relies on the existing structure, which reduces the hoisting cost of the staircase 3. At the same time, it can avoid the influence of the roof slab 11 on the hoisting of the staircase 3, and can quickly install the staircase 3, thereby improving the installation efficiency of the staircase 3, so that the staircase 3 can be hoisted after the construction of the roof slab 11 is completed. The staircase 3 does not need to be hoisted before the construction of the roof slab 11, which is conducive to the optimization of the construction process.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for rapid embedded installation of assembled steel structure stairs, characterized in that: The steps include: Before the construction of the roof slab (11), two roof slab cross beams (12) are installed above the stair installation space, a plurality of steel beams (13) are installed between the two roof slab cross beams (12), a hanger (2) is installed on the steel beam (13), and the hanger (2) can move along the steel beam (13); then, a casting template for the roof slab (11) is installed, and the roof slab (11) is constructed; After the construction of the roof slab (11) is completed, the staircase (3) is hoisted by the hoisting device (2), and the two ends of the staircase (3) are placed at the corresponding installation positions on the floor, and the two ends of the staircase (3) are fixed; the remaining staircases (3) are hoisted to the corresponding positions in turn by the same method; After all stairs (3) are hoisted, the hoisting equipment (2) is removed; When the building main body (1) is constructed, steel beams (15) are respectively installed on the floors on both sides of the stair installation space in alignment with the positions of the two ends of the stair (3) as the cross beams of the floor. After the stair (3) is hoisted in place, the two ends of the stair (3) are respectively welded with the steel beams (15). Then, the floor panels of the floors on both sides of the stair installation space are constructed, and the floor panels cover the two ends of the stair (3).

2. According to claim 1, a method for rapid embedded installation of assembled steel structure stairs is characterized by: The top plate cross beam (12) is a steel beam (15), the steel beam (13) is welded to the top plate cross beam (12), and a steel plate (14) is installed above the top plate cross beam (12) and the steel beam (13) as a casting template for the roof slab (11) above the stair installation space, the steel plate (14) is welded to the steel beam (13) and the top plate cross beam (12), respectively, and after the hanger (2) is removed, the top plate cross beam (12), the longitudinal beam and the steel plate (14) are subjected to rust prevention treatment.

3. The embedded rapid installation construction method of an assembled steel structure staircase according to claim 2 is characterized by: Connecting steel bars are welded to the tops of the steel beam (13) and the top plate cross beam (12), respectively. The steel plate (14) avoids the connecting steel bars when installing. When the roof plate (11) is constructed, the steel bars of the roof plate (11) are tied and fixed to the connecting steel bars.

4. The embedded rapid installation construction method of an assembled steel structure staircase according to claim 1 is characterized by: Two sets of slings (2) are provided, and the two sets of slings (2) are respectively installed on two different steel beams (13). Each section of stairs (3) is hoisted using two sets of slings (2).

5. The embedded rapid installation construction method for assembled steel structure stairs according to claim 1 is characterized by: The lifting device (2) comprises an electric vehicle and an electric hoist, wherein the electric vehicle is installed on a steel beam (13) and can move along the steel beam (13), and the electric hoist is installed on the electric vehicle.

6. The embedded rapid installation construction method for assembled steel structure stairs according to claim 1 is characterized by: After all the stairs (3) are hoisted, a construction platform is set up based on the building main body (1) and the installed stairs (3), and the workers remove the hoisting equipment (2) on the construction platform.

7. The embedded rapid installation construction method for assembled steel structure stairs according to claim 1 is characterized by: When the staircase (3) is hoisted by the hoisting device (2), the distance between the staircase (3) and the building main body (1) on both sides of the staircase installation space is 20 cm-50 cm.

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