σ＝ Nl /Ac＝10500/424＝24.8N/mm2＜0.85f ＝0.85 × 215＝182.8N/mm2； The strength of the steel pipe connecting the wall meets the requirements.
Under the joint work of M16 hexagon bolt and wall connecting rod, the calculation of three new wall connecting pieces is completed.
Cuplock Scaffolding Manufacturers
Sichuan Wanli Construction Technology Co., Ltd.
After the side formwork is removed, it shall be embedded and formed.
After the concrete strength reaches the removal condition of the side formwork, screw out the embedded part nut before the removal of the side formwork.
The wall connecting pieces are arranged in a diamond shape with two steps and three spans, vertical spacing of 3.6m and horizontal spacing of 4.5m.
The wall connecting pieces are used to connect the scaffold body with the main structure of the building in the construction project, which can transfer the tension and pressure, and are an important part of the scaffold.
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(3) The stability check calculation of steel pipes connected to walls shall be calculated according to Formula 5.2.12-2 of Technical Code for Safety of Steel Tubular Scaffold with Couplers in Building Construction (JGJ130-2011), and shall meet the following requirements: σ＝ Nl /（ φ A) ≤ 0.85f, where σ— Stress value of wall connected steel pipe (N/mm2); A – gross sectional area of wall connected steel pipe (mm2), adopted φ forty-eight × 3.0 Steel pipe, Ac ＝ 424mm2; Nl – design value of total axial force of wall connected steel pipe (N), Nl ＝ 10.5kN..
The length of the wall connecting steel pipe can be determined according to the actual situation.
After the concrete strength reaches 15MP, the wall connecting rods shall be installed.
This product and corresponding construction process effectively solve the problems of complex construction, wall damage and potential leakage in the traditional embedded steel pipe method, and we share them here for mutual learning, communication and innovation! Zhou Zheng: 13628057578 If your project plans to use this new type of wall connecting parts, you can contact by phone or scan the above QR code to add a new type of wall connecting parts.
After the reinforcement binding and formwork reinforcement are completed, according to the construction scheme, the spot positions shall be marked accurately on the side of the beam and wall with eye-catching color paint pen, and 1.2cm holes shall be drilled on the formwork, which shall be fixed with the formwork through the nuts externally connected to the embedded parts (the embedded position must meet the requirements of 10cm below the concrete structural plane).
Construction and installation of wall connecting pieces 1.
When the scaffold is removed, there is no need for additional masonry, additional plastering, or water seepage of the external wall.
The structure and installation of the new wall connecting parts are shown in the following figure.
A new type of wall connecting parts product is composed of M16 hexagon bolt special fastener wall connecting embedded parts (including 25mm × 25mm × 15mm square nut) (II) Construction process of new wall connecting pieces 1.
Calculation of force on wall connecting steel pipe (1) Calculation of total axial force design value of wall connecting steel pipe Nl is calculated according to Formula 5.2.12-3 of Technical Code for Safety of Steel Tubular Scaffold with Couplers in Building Construction (JGJ130-2011), which should meet: Nl=Nlw+N0, where Nlw is the design value of axial force on wall connecting steel pipe caused by wind load (kN), Calculated according to Article 5.2.13 of Technical Code for Safety of Steel Tubular Scaffold with Couplers in Building Construction (JGJ130-2011): Nlw ＝ 1.4wkAwwk – standard value of wind load (kN/m2), calculated at a height of 75m, wk ＝ 0.33kN/m2; AW – windward area of the outer side of the scaffold covered by a single wall connecting piece, Aw ＝ 3.6 × 4.5＝16.2m2； N0 – axial force (kN) generated by the out of plane deformation of the scaffold restrained by the wall connecting piece, according to Article 5.2.12 of Technical Code for Safety of Steel Tubular Scaffold with Couplers in Building Construction (JGJ130-2011), the value of double row scaffold is N0 ＝ 3kN.
Then Nlw ＝ 1.4WkAw ＝ 1.4 × zero point three three × 16.2＝7.5kN； Nl ＝ Nlw+N0 ＝ 7.5+3 ＝ 10.5kN (2) The strength of steel pipes connected to walls shall be calculated according to Formula 5.2.12-1 of Technical Code for Safety of Steel Tubular Scaffolding with Couplers in Building Construction (JGJ130-2011), and shall meet the following requirements: σ＝ Nl/Ac ≤ 0.85f, where: σ— Stress value of wall connected steel pipe (N/mm2); Ac – net sectional area of wall connected steel pipe (mm2) φ forty-eight × 3.0 Steel pipe, Ac ＝ 424mm2; Nl – design value of total axial force of wall connected steel pipe (N), Nl ＝ 10.5kN.
The masonry structure construction and the plastering and pasting of the external wall can be carried out in one step.
The wall attachment connection realized by wall connecting pieces plays an important role in strengthening the overall stability of the scaffold, improving its stable bearing capacity and avoiding major accidents such as toppling or collapse.
took a live picture of the project site, aiming at the disadvantages of traditional steel pipe wall fasteners, and focused on cost reduction and efficiency increase in the construction industry, technical innovation, and independent research and development to launch a new type of wall fasteners.
Wall connecting embedded parts (including 25mm × 25mm × 15mm square nut) is fixed with the formwork through the nut externally connected with the embedded part.
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During the construction of the main structure, the plastic pipe embedded parts with square steel nuts embedded in the new wall connecting parts shall be pre installed at the side of the peripheral beam of the concrete floor or in the shear wall wall according to the design position of the wall connecting parts, and the special wall connecting fasteners shall be fixed with the square steel nuts connected in the embedded parts with M16 hexagon thread ordinary bolt rods, and finally the wall connecting steel pipes and the upright poles of the scaffold shall be connected with fasteners, The tension and pressure can be effectively transmitted to ensure the firm and reliable connection between the scaffold body and the main structure of the building, and facilitate the construction of the external wall.
