PC staircase and steel structure limited sliding device and construction method thereof

Abstract

The present invention relates to a limited sliding device for a PC staircase and a steel structure and a construction method thereof, and belongs to the technical field of building steel structure, including a PC prefabricated staircase, wherein the front end of the PC prefabricated staircase is provided with a platform plate, the rear lower end of the platform plate is provided with a steel structure ladder beam, a limited fastener I extending to the front end of the PC prefabricated staircase is provided between the steel structure ladder beam and the platform plate, the front end of the PC prefabricated staircase is provided with a reinforcing rib, and a limited fastener II fastened to the reinforcing rib is provided between the limited fastener I and the PC prefabricated staircase. It has the advantages of good structural stability and simple and convenient construction operation. It effectively controls the slippage between the PC staircase and the steel structure. It avoids the problems of unclear construction method and excessive displacement of the node where the PC staircase and the steel structure are connected, and has high practicality, economy and ease of operation.

Description

Technical Field

[0001] The present invention relates to the technical field of building steel structures, and in particular to a limited sliding device for a PC staircase and a steel structure and a construction method thereof. Background Art

[0002] In the field of building structures, steel structures are developing rapidly, and PC prefabricated stairs are widely used. Under the current construction environment, the use of PC prefabricated stairs has also become an emerging trend in buildings with steel structures as the main body. Steel structures are mostly prefabricated in factories, which are convenient to construct and install quickly. PC prefabricated stairs also only need to be installed on site, which reduces the construction period and saves costs compared to steel stairs.

[0003] Nowadays, the construction technology of connecting PC stairs and steel structures is still incomplete. Sliding supports are now used to connect steel structures and PC stairs. By installing limiting fasteners, the slippage between the two can be controlled, which can not only prevent the slippage deviation caused by construction during the installation process, but also reduce the deformation and slippage of PC prefabricated stairs caused by temperature and other factors in the later stage. It can provide a new construction method for the limited slippage connection between steel structures and PC stairs. Summary of the invention

[0004] The present invention mainly solves the shortcomings of the prior art, such as large slippage during construction and offset in the later stage, and provides a limited slip device for PC stairs and steel structures and a construction method thereof, which has the advantages of good structural stability and simple and convenient construction operation. The slippage between the PC stairs and the steel structure is effectively controlled. The problems of unclear construction methods and excessive displacement of the nodes connecting the PC stairs and the steel structure are avoided, and the device has high practicality, economy and ease of operation.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0006] A limiting sliding device for a PC staircase and a steel structure comprises a PC prefabricated staircase, wherein the PC prefabricated staircase has a platform plate at the front end, a steel structure ladder beam is provided at the rear lower end of the platform plate, a limiting fastener I extending to the front end of the PC prefabricated staircase is provided between the steel structure ladder beam and the platform plate, a reinforcing rib is provided at the front end of the PC prefabricated staircase, and a limiting fastener II fastened to the reinforcing rib is provided between the limiting fastener I and the PC prefabricated staircase.

[0007] Preferably, the rear end of the steel structure ladder beam is provided with a number of vertical stiffening ribs extending to the lower part of the PC prefabricated staircase, the vertical stiffening ribs are integrally welded and fixed to the steel structure ladder beam, and sliding bearings are provided between the vertical stiffening ribs and the PC prefabricated staircase.

[0008] Preferably, a horizontal stiffening rib is provided between the sliding support and the vertical stiffening rib, the front end of the horizontal stiffening rib is integrally welded and fixed to the steel structure ladder beam, and the lower end of the horizontal stiffening rib is integrally welded and fixed to the vertical stiffening rib.

[0009] Preferably, the width b of the horizontal stiffening ribs and the vertical stiffening ribs is ≥ the width of the PC prefabricated stair treads, and the height h is ≥ the thickness of the PC prefabricated stair treads. The vertical stiffening ribs are evenly spaced at a spacing of 500 mm.

[0010] Preferably, the sliding support is bonded and fixed to the concrete surface at the lower end of the PC prefabricated staircase.

[0011] Preferably, the front end of the PC prefabricated staircase is provided with a reserved installation position for the PC staircase which is movably socketed with the limiting fastener II.

[0012] A construction method of a limited sliding device for a PC staircase and a steel structure, comprising the following steps:

[0013] Step 1: According to the size of the steel structure ladder beam and the thickness of the PC prefabricated stair tread, determine the specifications and welding positions of the horizontal stiffening ribs and vertical stiffening ribs, and determine the installation positions of the limit fasteners I and II.

[0014] Step 2: Process and weld the steel structure ladder beam, horizontal stiffening ribs and vertical stiffening ribs into a whole in the factory. The limit fastener I is welded in the factory or on site.

[0015] Step 3: Set reinforcing ribs at the end of the PC prefabricated stairs and reserve the installation position of limit fastener II. The installation position of limit fastener II should correspond to the position of limit fastener I.

[0016] Step 4: During on-site installation, fix the sliding support to the horizontal stiffening ribs.

[0017] Step 5: Hoist the PC prefabricated stairs at the designated location and connect them to the sliding supports.

[0018] Step 6: Install limit fastener II on site to the buckling position corresponding to limit fastener I, and weld it to the reinforcement rib. Limit fastener II and limit fastener I can buckle together after slipping, that is, the construction and installation of the limit sliding device of the PC staircase and the steel structure is completed.

[0019] Preferably, a gap is left between the platform plate and the PC prefabricated stairs as installation operation space, and the preferred gap distance is 100 mm.

[0020] Preferably, the limiting fastener I and the limiting fastener II are mutually nested and formed, and the limiting fastener I and the limiting fastener II are preferably made of cold-bent steel plates.

[0021] As a preferred option, a reserved installation position for the PC stairs is reserved at the reinforcement rib as the installation position for the limit fastener II, and concrete is not poured at the reserved installation position for the PC stairs to avoid unclear installation positioning during on-site construction.

[0022] The present invention can achieve the following effects:

[0023] The present invention provides a limited sliding device for a PC staircase and a steel structure and a construction method thereof, which, compared with the prior art, has the advantages of good structural stability and simple and convenient construction operation. The slip between the PC staircase and the steel structure is effectively controlled. The problems of unclear construction method and excessive displacement of the connection node between the PC staircase and the steel structure are avoided, and the device has high practicality, economy and ease of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the connection node structure of the present invention.

[0025] Figure 2 It is a structural cross-sectional view of the connection node AA of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the reserved installation position of the PC staircase of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the installation of the limiting fastener of the present invention.

[0028] In the figure: platform plate 1, limit fastener I 2, limit fastener II 3, reinforcement rib 4, sliding support 5, PC staircase 6, horizontal stiffening rib 7, vertical stiffening rib 8, steel structure ladder beam 9, reserved installation position 10 for PC staircase. DETAILED DESCRIPTION

[0029] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0030] Example: Figure 1-4As shown, a limited sliding device for PC stairs and steel structure includes PC prefabricated stairs 6, PC prefabricated stairs 6, a platform plate 1 is provided at the front end of the PC prefabricated stairs 6, a steel structure ladder beam 9 is provided at the rear lower end of the platform plate 1, a limited fastener I2 extending to the front end of the PC prefabricated stairs 6 is provided between the steel structure ladder beam 9 and the platform plate 1, a reinforcing rib 4 is provided at the front end of the PC prefabricated stairs 6, a limited fastener II3 fastened to the reinforcing rib 4 is provided between the limited fastener I2 and the PC prefabricated stairs 6, and a PC staircase reserved installation position 10 movably sleeved with the limited fastener II3 is provided at the front end of the PC prefabricated stairs 6. The rear 4 pieces of the steel structure ladder beam 9 are provided with vertical stiffening ribs 8 extending to the lower part of the PC prefabricated stairs 6, the vertical stiffening ribs 8 and the steel structure ladder beam 9 are integrally welded and fixed, a sliding support 5 is provided between the vertical stiffening ribs 8 and the PC prefabricated stairs 6, and the sliding support 5 is bonded and fixed to the concrete surface at the lower end of the PC prefabricated stairs 6. A horizontal stiffening rib 7 is provided between the sliding support 5 and the vertical stiffening rib 8. The front end of the horizontal stiffening rib 7 is integrally welded and fixed to the steel structure ladder beam 9, and the lower end of the horizontal stiffening rib 7 is integrally welded and fixed to the vertical stiffening rib 8. The width b of the horizontal stiffening rib 7 and the vertical stiffening rib 8 is ≥ the step width of the PC prefabricated staircase 6, and the height h is ≥ the thickness of the PC prefabricated staircase 6. The vertical stiffening ribs 8 are distributed at equal intervals.

[0031] A construction method of a limited sliding device for a PC staircase and a steel structure, comprising the following steps:

[0032] The first step: according to the size of the steel structure ladder beam 9 and the thickness of the stair tread of the PC prefabricated stair 6, determine the specifications and welding positions of the horizontal stiffening ribs 7 and the vertical stiffening ribs 8, and determine the installation positions of the limit fasteners Ⅰ2 and the limit fasteners Ⅱ3. The limit fasteners Ⅰ2 and the limit fasteners Ⅱ3 are mutually nested and formed. The limit fasteners Ⅰ2 and the limit fasteners Ⅱ3 are preferably made of cold-bent steel plates.

[0033] Step 2: Process and weld the steel structure ladder beam 9, the horizontal stiffening rib 7 and the vertical stiffening rib 8 into a whole in the factory, and weld the limit fastener Ⅰ2 in the factory or on site.

[0034] Step 3: Set the reinforcement rib 4 at the end of the PC prefabricated staircase 6, and reserve the installation position of the limit fastener Ⅱ3. Reserve the PC staircase reserved installation position 10 at the reinforcement rib 4 as the installation position of the limit fastener Ⅱ3. Do not pour concrete at the PC staircase reserved installation position 10 to avoid unclear installation positioning during on-site construction. The installation position of the limit fastener Ⅱ3 should correspond to the position of the limit fastener Ⅰ2.

[0035] Step 4: During on-site installation, fix the sliding support 5 on the horizontal stiffening rib 7.

[0036] Step 5: hoist the PC prefabricated staircase 6 at the designated position and connect it to the sliding support 5; leave a gap between the platform plate 1 and the PC prefabricated staircase 6 as an installation operation space, and the preferred gap distance is 100 mm.

[0037] Step 6: Install the limit fastener II 3 on site to the buckling position corresponding to the limit fastener I 2, and weld it to the reinforcement 4. The limit fastener II 3 and the limit fastener I 2 can buckle together after slipping, that is, the construction and installation of the limit sliding device of the PC staircase and the steel structure is completed.

[0038] In summary, the limited sliding device of the PC staircase and the steel structure and the construction method thereof have the advantages of good structural stability and simple and convenient construction operation. The slip between the PC staircase and the steel structure is effectively controlled. The problems of unclear construction method and excessive displacement of the connection node between the PC staircase and the steel structure are avoided, and the device has high practicality, economy and ease of operation.

[0039] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A construction method for a limited sliding device of a PC staircase and a steel structure, characterized in that: The PC staircase and steel structure limiting sliding device comprises a PC prefabricated staircase (6), wherein the PC prefabricated staircase (6) has a platform plate (1) at the front end, and a steel structure ladder beam (9) is provided at the rear lower end of the platform plate (1), and a limiting fastener I (2) extending to the front end of the PC prefabricated staircase (6) is provided between the steel structure ladder beam (9) and the platform plate (1), and the PC prefabricated staircase (6) has a reinforcing rib (4) at the front end, and a limiting fastener II (3) fastened to the reinforcing rib (4) is provided between the limiting fastener I (2) and the PC prefabricated staircase (6); the rear end of the steel structure ladder beam (9) has a plurality of vertical extending to the lower part of the PC prefabricated staircase (6). Stiffening ribs (8), wherein the vertical stiffening ribs (8) are integrally welded and fixed to the steel structure ladder beam (9), and a sliding support (5) is provided between the vertical stiffening ribs (8) and the PC prefabricated staircase (6); a horizontal stiffening rib (7) is provided between the sliding support (5) and the vertical stiffening ribs (8), and the front end of the horizontal stiffening ribs (7) is integrally welded and fixed to the steel structure ladder beam (9), and the lower end of the horizontal stiffening ribs (7) is integrally welded and fixed to the vertical stiffening ribs (8); the width b at the horizontal stiffening ribs (7) and the vertical stiffening ribs (8) is ≥ the step width of the PC prefabricated staircase (6), and the height h is ≥ the staircase thickness of the PC prefabricated staircase (6), and the vertical stiffening ribs (8) are distributed at equal intervals; The steps are as follows: Step 1: According to the size of the steel structure ladder beam (9) and the thickness of the ladder plate of the PC prefabricated staircase (6), determine the specifications and sizes of the horizontal stiffening ribs (7) and the vertical stiffening ribs (8) and the welding positions, and determine the installation positions of the limit fasteners I (2) and the limit fasteners II (3); Step 2: Process and weld the steel structure ladder beam (9) and the horizontal stiffening rib (7) and the vertical stiffening rib (8) into a whole in the factory, and weld the limit fastener I (2) in the factory or on site; Step 3: The end of the PC prefabricated staircase (6) is provided with reinforcing ribs (4) and a position for installing the limit fastener II (3) is reserved. The installation position of the limit fastener II (3) should correspond to the position of the limit fastener I (2); Step 4: During on-site installation, the sliding support (5) is fixed to the horizontal stiffening rib (7); Step 5: hoist the PC prefabricated staircase (6) at the designated location and connect it to the sliding support (5); Step 6: Install the limit fastener II (3) on site to the corresponding fastening position of the limit fastener I (2), and weld it to the reinforcing rib (4). The limit fastener II (3) and the limit fastener I (2) can be fastened together after sliding, and the construction and installation of the limit sliding device of the PC staircase and the steel structure are completed.

2. The construction method of the limited sliding device of the PC staircase and the steel structure according to claim 1 is characterized in that: The sliding support (5) is bonded and fixed to the concrete surface at the lower end of the PC prefabricated staircase (6).

3. The construction method of the limited sliding device of the PC staircase and the steel structure according to claim 1 is characterized in that: The front end of the PC prefabricated staircase (6) is provided with a reserved PC staircase installation position (10) which is movably sleeved with the limiting fastener II (3).

4. The construction method of the limited sliding device of the PC staircase and the steel structure according to claim 1 is characterized in that: A gap is left between the platform plate (1) and the PC prefabricated staircase (6) as installation operation space, and the gap distance is 100 mm.

5. The construction method of the limited sliding device of the PC staircase and the steel structure according to claim 1 is characterized in that: The limit fastener I (2) and the limit fastener II (3) are mutually inserted and formed, and the limit fastener I (2) and the limit fastener II (3) are made by cold bending of steel plates.

6. The construction method of the limited sliding device of the PC staircase and the steel structure according to claim 1 is characterized in that: A reserved installation position (10) for the PC staircase is reserved at the reinforcement rib (4) as the installation position for the limit fastener II (3). No concrete is poured at the reserved installation position (10) for the PC staircase to avoid unclear installation positioning during on-site construction.

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