Steel pipe fastener type external scaffolding construction technical measures?

Technical measures for the construction of steel pipe fastening type external scaffolding is very important, the development of measures is to better play the role of technology, each detail is very critical. Zhongda consulting on steel pipe fastener type external scaffolding construction technology measures and explain.

1, the project scaffolding using steel pipe fastener scaffolding, mainly used for the main construction of the peripheral facade of the horizontal, vertical protection and decoration of the construction of the outer frame. The scaffolding is erected strictly according to the Safety Technical Code for Fastened Steel Pipe Scaffolding in Building Construction (J84-2001).

2, external scaffolding construction design

2.1, double-row floor-type external scaffolding structure

2.1.1 erection parameters

The longitudinal spacing of vertical rod is 1800, the horizontal spacing of vertical rod is 800, the spacing of large horizontal rod is 1800, the spacing of small horizontal rod is 900, and erected on top of the large horizontal rod, and the spacing of connecting rod is 6000, and a scissor brace is set up for every four spans. Set a scissor brace.

Full hanging of the facade of a mesh safety net and pocket under the mouth, hanging mesh safety net, each safety net tied points not less than 6 points, and with wire tie, each layer of scaffolding boards, side beam holes with scaffolding boards or safety nets to seal.

3, the outer frame construction

3.1, erection of double rows of outer frame preparatory work

3.1.1 by the project technical person in charge of the construction of the outer frame construction management personnel, the project safety officer for the construction of technical briefings, so that they are familiar with the design of the program, understanding of the structure of the samples, to understand the importance of the safety of the erection of the outer frame, and clear the use of the outer frame of the function.

3.1.2 The construction management personnel and safety officer of the external frame will make safety and technical briefing to the workers, so that the workers will be clear about the construction methods and regulations.

3.1.3 Each operator must have the qualification of working at height and scaffolding operation, review and verification by the project department for construction operation, unqualified, unlicensed personnel are strictly prohibited to be used in the construction of the project.

3.1.4 According to the project plan layout of inclined pickets, and then according to the location of inclined pickets and pickets, to determine the location of ground anchors that should be reserved and buried in the civil construction, the location is marked on the construction drawings, and it is required that the location of the reservation error is not greater than 50mm.

3.1.5, the organization of steel pipe, fasteners, scaffolding boards, safety nets and other materials into the field.

Steel pipe adopts φ48×3.5mm, A3 steel pipe, and its mechanical properties and chemical composition meets the requirements of No.3 sedum steel in GB700-88.

Fasteners comply with the provisions of BG978-67; T-bolts, nuts and other materials comply with the provisions of A3 steel in BG700-79, and the surface of fasteners is treated with anti-rust.

The scaffolding board adopts bamboo springboard, and the safety net adopts dense safety net.

3.2 Requirements for erection

3.2.1 When erecting for the first time, the installation auxiliary frame will be erected first to ensure the safety of erection.

3.2.2 erection procedures:

Establish the first section of the riser - install large crossbar - install small crossbar - auxiliary scaffolding boards - circulation - set up the connecting wall rod - set up scissor braces - hang safety net - dismantle auxiliary frame - acceptance

3.2.3, the main points of the construction:

3.2.3.1 Select the appropriate length of steel pipe as the riser In order to facilitate the outer frame to add a layer, the bottom layer can be removed smoothly, and each pick out the pick and riser, should be one inside and one outside 150mm apart, so as not to occur in the demolition process "pull" phenomenon, can not be avoided when you have to reinforce an auxiliary pole, before removing the proposed riser.

When the outer frame for decoration down, the construction method and the above process is opposite.

3.2.3.2, in order to facilitate the cycle of erection and dismantling in the process of ascending and descending, in addition to the appropriate length of the vertical rod, it should also comply with the scaffolding regulations and program design, and pay attention to the adoption of temporary bracing or temporary tie-ups with the building to cooperate with the cycle of erection and dismantling.

3.2.4Setting up notes are as follows:

In addition to the top single row can be lapped, the rest of the joints are connected by direct buckling, staggered joints, staggered joints of two adjacent uprights are staggered in the different synchronous distance, and is greater than 500, and the joints from the nearest node is not greater than 1/3 of the step, and staggered by 500; in the same step, the inner and outer corresponding large crossbar joints are staggered by one span, and the upper and lower corresponding large crossbar joints are staggered by one span, and the upper and lower corresponding large crossbar joints are staggered by one span. In the same step, inner and outer corresponding big crossbar joints are staggered one span, and upper and lower two neighboring big crossbar joints are staggered one span.

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