Super high-rise row lining air pipe air shaft variable-process construction method

Abstract

The invention discloses a variable-process construction method for a super high-rise row lining air pipe air shaft, and belongs to the technical field of building construction. When a wall body is not built in the air shaft with the exhaust air pipes, site construction work of prefabricated parts is conducted firstly, according to the size of the air pipes and the size of the openings of the air pipes, vertical angle steel supports with the size of 50 * 5 are arranged and installed at the corners of the openings, angle steel with the size of 50 * 5 and the material property of Q235B-1 is adopted for the supports, then lining air pipes are installed, and the vertical angle steel supports with the size of 50 * 5 are installed at the corners of the openings of the air pipes. Horizontal inner supporting section steel and an inner supporting type fixing support are installed at different heights in the transverse direction according to relevant specifications and are welded and fixed to a vertical angle steel support, a lattice type section steel support of a simple frame system is jointly formed, the inner supporting type fixing support is supported at the bottom of a lining air pipe angle steel flange, and it is guaranteed that the weight of an upper air pipe cannot be conducted downwards. The inner supporting type fixing support not only ensures fixation of the lining air pipe, but also well avoids lateral deformation of the lattice type section steel support. In the installation process, the lattice type profile steel support serves as a novel support system for replacing a bearing structure such as a post-built wall.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and more specifically, to a construction method for changing the construction process of a super high-rise row-connected inner-lined air duct air shaft. Background Art

[0002] The construction of vertical inner-lined air ducts in air shafts of super high-rises is a key point in the construction of ventilation and air conditioning projects. Due to the limited area of the super high-rise core tube, row-connected inner-lined air ducts are often designed. The traditional construction method is to first build and plaster the pipe shaft, reserve a single-sided wall, and then install the air duct and supports. There are often problems such as too small a distance between the wall built and the inner-lined air duct after the wall is built, insufficient operating space for installing the air duct and supports, and insufficient load-bearing capacity of the load-bearing supports fixed on the built wall. Summary of the Invention

[0003] This application provides a construction method for changing the construction process of a super high-rise row-connected inner-lined air duct air shaft, providing an efficient and reliable construction method.

[0004] This application provides a construction method for changing the construction process of a super high-rise row-connected inner-lined air duct air shaft, including air duct processing, measurement and layout, installation of lattice-shaped steel supports, installation of inner-lined air ducts and wall following masonry and plastering, installation of horizontal internal support steel and internal support fixed brackets, installation of finished air duct end seals, and masonry and plastering of the air shaft wall for completion; among them, air duct processing includes air duct unfolding and blanking, cutting, chamfering, seaming, flanging, bead forming, square flange blanking, assembly, welding, drilling, painting, air duct riveting and flanging, inspection and testing.

[0005] The present invention changes the traditional construction process, shortens the construction period, has good finished product quality, uses a new lattice-shaped steel support system as the main load-bearing member, and improves the reliability of the construction of the inner-lined air duct in the air shaft. Brief Description of the Drawings

[0006] Figure 1 It is the construction process flow chart of the present invention

[0007] Figure 2 It is the air duct processing process flow chart of the present invention

[0008] Figure 3 It is the air duct flanging dimension drawing of the present invention

[0009] Figure 4 It is the oblique view of the installation of the lattice-shaped steel support in the air shaft of the present invention

[0010] Figure 5 It is the front view of the installation of the lattice-shaped steel support in the air shaft of the present invention

[0011] Figure 6 It is the installation drawing of the fixed steel plate base of the present invention

[0012] Figure 7 Installation sectional view of the fixing steel plate of the present invention

[0013] Figure 8 Oblique view of the installation of the inner lining air duct and the inner support type fixing bracket of the present invention

[0014] Figure 9 Front view of the installation of the inner lining air duct and the inner support type fixing bracket of the present invention

[0015] Figure 10 Connection installation drawing of the vertical inner lining air duct of the air shaft of the present invention

[0016] Figure 11 Installation drawing of the inner support type fixing bracket of the present invention

[0017] Figure 12 Drawing of the construction method at the wall corners and joints of the present invention (when there is no construction column)

[0018] Figure 13 Oblique view of the masonry of the air shaft wall of the present invention

[0019] Figure 14 Front view of the masonry of the air shaft wall of the present invention

[0020] Figure 15 Schematic diagram of the installation of the finished tail seal of the air duct of the present invention

[0021] 1. Air duct connection flange; 2. Air duct flanging; 3. Concrete floor slab; 4. ∠50×5 angle steel; 5. 180×200×10mm steel plate; 6. Air shaft opening; 7. M13*90mm expansion bolt; 8. Frame type support frame (lattice type steel support); 9. Inner support type fixing bracket (installed synchronously with the inner lining air duct); 10. Inner lining air duct; 11. Class A non-combustible gasket; 12. Bolt hole; 13. 2φ6 tie bars (set at intervals of 1m along the wall height); 14. Masonry wall; 15. 1.6mm finished tail seal; S1. Air duct processing; S2. Measuring and setting out; S3. Installation of lattice type steel support; S4. Installation of inner lining air duct, wall following masonry and plastering; S5. Installation of horizontal inner support steel and inner support type fixing bracket; S6. Installation of finished tail seal; S7. Completion of masonry and plastering of air shaft wall; S8. Painting anti-rust paint. Detailed implementation manners

[0022] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become more clearly defined.

[0023] As used herein, the term "exemplary" means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein need not be construed as superior to or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0024] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] An embodiment of the present application discloses a safe and intelligent hanging basket. The whole hanging basket is composed of a suspension mechanism, a suspended platform, a hoist, a safety lock, a working steel wire rope, a safety steel wire rope, an electrical box and an electrical control system.

[0026] Refer to Figure 1 , Figure 2 , Figure 3 , a method for processing air ducts in the construction method of changing processes for super high-rise row-connected inner lining air ducts and air shafts recorded in the embodiments of the present application includes the following steps:

[0027] I. Air duct processing S1

[0028] The air ducts are made of hot-dip galvanized steel sheets and are flange-connected. Considering the production quality and speed of the air ducts, mechanized fully automatic production is adopted. The galvanized steel sheets are cut, squared, spliced, and corner-seamed by a self-developed intelligent laser cutting robot, a squaring machine, and a seaming machine.

[0029] 1. Air duct blanking: The unfolding and blanking of the air ducts adopt Autodesk AutoCAD software, which has rich graphics and drawing tools built-in, supports 2D and 3D drawing, and can also use a dedicated air duct plug-in to quickly and accurately complete the design and unfolding and blanking work of the air ducts.

[0030] 2. Air duct joints: The air ducts are made by seaming

[0031] 3. Seaming form: The splicing of the sheets adopts single seaming, and the seaming form for the production of air ducts and fittings adopts corner seaming.

[0032] 4. Air duct cutting: The self-developed intelligent laser cutting robot is connected to the computer software to achieve automatic feeding on demand and precise cutting, ensuring the precise dimensions of the air duct components.

[0033] 5. Seaming processing: Strictly construct according to the production processes of single seaming and corner seaming. Pay special attention to: the seaming joints are tightly combined, without half-seaming or splitting phenomena, stagger the longitudinal seams of the straight pipe splicing, and the seam widths are uniform. When the plate thickness < 1mm, the single seaming width is 12mm, and the corner seaming width is 10mm; when the plate thickness ≥ 1mm, the single seaming width is 14mm, and the corner seaming width is 12mm.

[0034] 6. Duct connection: The ducts are connected by flanges, and a 4.0-mm-thick non-asbestos Class A non-combustible gasket 11 is placed between the flanges. When connecting straight pipe sections, the on-site space size, duct dimensions, and transportation will be comprehensively considered to minimize the short pipes of the ducts, reduce installation joints, thereby reducing the air leakage volume, and facilitating thermal insulation and reducing the consumption of angle steel for flanges.

[0035] 7. Duct flange: The section steel is straightened before scribing and blanking. When blanking, it is considered that the inner diameter of the flange is slightly larger than the outer diameter of the duct by 2 - 3 mm, and it is cut by a cutting machine according to the scribed line. To ensure the flatness of the flange, the flange welding is operated by a welding robot on a platform. A right-angle mold is made before welding to ensure the straightness of the flange. The flange bolt holes 12 are drilled by a mechanical bench drill. First, drill the bolt holes 12 at the four corners of the flange, and then drill the bolt holes 12 on each side of the flange according to the equal division principle to ensure the symmetry of the bolt holes 12 of a single specification flange and the interchangeability of the bolt holes 12 of a batch of flanges of the same specification. After the flange is fabricated, it is connected to the duct by rivets. The width of the duct flanging 2 is made 6 mm to ensure the flatness and tightness of the flanging.

[0036] II. Measurement and setting out S2

[0037] Perform BIM layout for the vertical lining duct 10 to determine the duct spacing, determine the installation position of the lattice-type support according to the masonry position of the civil engineering wall, and snap lines on-site. Measure whether there is deviation in the verticality of the structural opening to ensure the verticality of the duct installation.

[0038] Refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 , in the positioning and installation operation method of the lattice-type section steel support 8 in a super high-rise row lining duct air shaft variable process construction method recorded in the embodiments of the present application, it includes the following steps:

[0039] III. Positioning and installation of lattice-type section steel support S3

[0040] According to the on-site measurement and setting out dimensions, the masonry snap line position of the civil engineering air shaft wall, and the layout spacing of the lining duct 10 in the BIM drawing, prefabricate the lattice-type section steel support 8, the horizontal inner support section steel, and the inner support type fixing support 9 for fixing the lining duct 10 with ∠50×5 angle steel. The lattice-type section steel support 8 is fixed to the concrete structure with a 180×200×10-mm steel plate 5, and the steel plate is fixed to the concrete floor slab 3 with M13*90-mm expansion bolts 7. The welding parts are painted with anti-rust paint.

[0041] Refer to Figure Eight , Figure Nine , Figure Ten , Figure Ten1. In the installation operation method of the inner lining air duct 10 and the inner support type fixed bracket 9 in the construction method of changing the working process of the super high-rise row-connected inner lining air duct air shaft recorded in the embodiment of the present application, the following steps are included:

[0042] 4. Installation of the inner lining air duct and the inner support type fixed bracket S4

[0043] When installing the inner lining air duct 10, use a plumb bob to control the verticality of the inner lining air duct 10 at the verticality control line below the side of the air shaft. A non-asbestos Class A non-combustible gasket 11 with a thickness of 4.0 mm is used between the connecting flanges of each section of the air duct to ensure the installation quality and process aesthetics of the air duct. After installing to the required fixed height, weld the horizontal inner support steel section to the lattice steel support 8 and fix the inner support type fixed bracket 9 at the bottom of the air duct connecting flange. A horizontal inner support steel section and an inner support type fixed bracket 9 are set at intervals not greater than 4 m for the vertically installed vertical air ducts, and at least one support should be set on each floor. After welding, apply anti-rust paint S8.

[0044] Refer to Figure 12 , Figure 13 , Figure 14 , Figure 15 1. In the installation operation method of the finished product end seal and the wall masonry plastering in the construction method of changing the working process of the super high-rise row-connected inner lining air duct air shaft recorded in the embodiment of the present application, the following steps are included:

[0045] 5. Installation of the finished product end seal S6 and finishing of the wall masonry plastering S7

[0046] Because three large-section air shafts are adjacent to each other, the distance between each adjacent air shaft is 300 mm, and the operation space is limited. The method of first installing the air duct and then following to build the adjacent wall with the wall masonry height 200 mm lower than the air duct connection is adopted. Install the finished product air duct end seal 15 at the lower air duct to ensure that no masonry debris falls into the air duct and there is enough operation space for the bolts of the angle steel flange at the connection to be tightened. The three vertical inner lining air ducts 10 and the adjacent masonry walls 14 are constructed in a segmented flowing water cycle.

[0047] Before wall masonry, it is necessary to clean the floating slurry on the surfaces of components such as the ground, wall columns, and beams. Position and set out the wall according to the drawing. For the construction column rebar planting, use two long and two short bars to meet the requirements of the binding lap length. The main reinforcement of the construction column framework is staggered up and down to meet the requirements of the upper and lower lap. At the corners of the masonry (when there is no construction column), steel bars should be embedded. When building the wall, when building to 150 - 180 mm (or 20 - 60 mm) from the bottom of the beam and slab, it should be left for more than 14 days before building the inclined top brick. When building the inclined top brick of the infill wall, vertical bricks should be used for inclined masonry and squeezed tightly, and the inclination angle should be about 50 - 75°. The masonry mortar should be full and meet the requirements of effective bonding.

[0048] The above description of the present application is combined with preferred embodiments. However, these embodiments are merely exemplary and only serve an illustrative purpose. On this basis, various substitutions and improvements can be made to the present application, and all of these fall within the protection scope of the present application.

Claims

1. A super high-rise terraced lining air duct air shaft variable process construction method, characterized in that: include: Duct processing (S1) The air duct is made of hot-dip galvanized steel plate and connected by flanges. Considering the quality and speed of air duct production, it adopts mechanized and fully automatic production. The self-developed intelligent laser cutting robot, folding machine and bite machine complete the cutting, folding and splicing of galvanized steel plates and corner bite.

2. Duct cutting: Duct cutting and unfolding adopts Autodesk Auto CAD software, which has built-in rich graphics and drawing tools, supports two-dimensional and three-dimensional drawing, and can also use special duct plug-ins to quickly and accurately complete the design and unfolding of ducts.

3. Duct joints: Ducts are made using bite joints. Bite-in form: Single bite is used for plate splicing, and corner bite is used for air duct and accessories.

4. Duct cutting: The self-developed intelligent laser cutting robot is connected to the computer software to realize automatic on-demand feeding and precise cutting to ensure the accurate size of duct components.

5. Bite processing: Strictly follow the single bite and corner bite production process, pay attention to: the bite seam is tightly combined, there is no half bite or cracking, stagger the longitudinal bite seam of the straight pipe splicing, and the bite seam width is uniform. When the plate thickness is less than 1mm, the single bite width is 12mm, and the corner bite width is 10mm; when the plate thickness is ≥1mm, the single bite width is 14mm, and the corner bite width is 12mm.

6. Duct connection: Ducts are connected by flanges, with 4.0 mm thick non-asbestos Class A non-combustible gaskets (11) between flanges. When connecting straight duct sections, the size of the site and the size and transportation of the ducts will be considered comprehensively, and the short ducts will be minimized to reduce installation joints, thereby reducing air leakage, facilitating heat preservation and reducing the amount of angle steel used for flanges.

7. Duct flange: The steel is marked and straightened before cutting. When cutting, the inner diameter of the flange is slightly larger than the outer diameter of the duct by 2 to 3 mm. The flange is cut by a cutting machine according to the marked line. To ensure the flatness of the flange, the flange welding is operated by a welding robot on a platform. Before welding, a right-angle mold is made to ensure the right angle of the flange. The bolt holes (12) of the flange are drilled with a mechanical bench drill. The bolt holes (12) at the four corners of the flange are drilled first, and then the bolt holes (12) on each side of the flange are drilled according to the principle of equal division to ensure that the bolt holes (12) of a single specification flange are symmetrical and the bolt holes (12) of the same specification flanges in batches can be interchanged. After the flange is made, it is connected to the duct with rivets. The width of the duct flange (2) is made to be 6 mm to ensure that the flange is flat and tight.

8. Measurement and setting out (S2) Perform BIM layout for the vertical lining duct (10), determine the duct spacing, determine the lattice bracket installation position based on the civil wall masonry position and mark the line on site. Measure whether there is any deviation in the verticality of the structural opening to ensure the verticality of the duct installation.

9. Positioning and installation of lattice steel support (S3) According to the on-site measurement and layout dimensions, the location of the air shaft wall line of the civil engineering, and the arrangement spacing of the inner lining air duct (10) in the BIM drawing, ∠50×5 angle steel (4) is used to prefabricate the lattice steel bracket (8) and the horizontal inner supporting steel and the inner supporting fixed bracket (9) for fixing the inner lining air duct (10). The lattice steel bracket (8) is fixed to the concrete structure with a 180×200×10mm steel plate (5), and the steel plate is fixed to the concrete floor 3 with an M13*90mm expansion bolt (7). The welding parts are painted with anti-rust paint.

10. Installation of lined air duct and internal support bracket (S4) When installing the inner lining air duct (10), use a plumb bob to control the verticality of the inner lining air duct (10) at the bottom of the air shaft. Use a 4.0mm thick non-asbestos A-grade non-combustible gasket (11) between the flanges of each section of the air duct to ensure the quality of the air duct installation and the aesthetics of the workmanship. After installing to the required fixed height, weld the horizontal inner support steel and the inner support type fixed bracket (9) with the lattice steel bracket (8) and fix them at the bottom of the air duct connection flange. Install the vertical air duct at a spacing of no more than 4m. Set a horizontal inner support steel and an inner support type fixed bracket (9). At least one support should be set for each layer. Apply anti-rust paint after welding.

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