JG/T 546-2019Safety protection platform for adhering type lifting operation for building construction (English PDF)

3.1 Terms and definitions

3.1.1

Attached lifting operation safety protection platform for building construction safety protection platform for adhering type lifting operation for building construction Set up a frame with a certain height and attached to the building structure, relying on its own lifting equipment and device, can climb or descend with the building structure layer by layer, with safety protection, anti-tilting, anti-falling and the construction work platform with synchronous lifting function. It consists of platform structure, lifting mechanism, power equipment, it is composed of anti-tilt device, anti-fall device and lifting synchronization control system. Referred to as the protection platform.

3.1.2

Platform structure

A frame composed of a vertical main frame, a horizontal supporting structure and a platform frame.

3.1.3

Vertical main frame

It is perpendicular to the facade of the building structure and connected with the guide rails, mainly to bear and transmit the platform Vertical frame type structural parts for vertical and horizontal loads, made of steel pipes or section steel, divided into planes Three structural forms. truss, space truss and rigid frame.

3.1.4

Horizontal supporting structure Set at the bottom of the vertical main frame, parallel to the exterior of the building structure, and with the vertical main frame the frame is connected, mainly bears the vertical load of the platform, and transmits the vertical load to the vertical main frame the horizontal support member. It is made of steel pipe or section steel and is a space truss structure or section steel beam structure.

3.1.5

Platform frame

A frame body installed between two adjacent vertical main frames and supported on a horizontal supporting structure, it is composed of fastener steel pipe scaffolding, portal steel pipe scaffolding or socket type disc-buckle steel pipe scaffold, or erected by section steel components.

3.1.6

Protection platform unit it consists of two adjacent vertical main frames, horizontal supporting structure and platform frame, lifting mechanism, Unit structure composed of anti-tilt and anti-falling device and synchronous lifting control system. Also called platform unit.

3.1.7

Lifting mechanism

It is composed of attached support, upper and lower lifting points, and guide rails, which assist the lifting operation of the platform facility.

3.1.8

Attached bearing

The component connecting the protective platform and the building structure bears and transmits the load on the platform as far as the building structure, it bears the lifting power and supports the anti-tilting and anti-falling functions. By attachment it is composed of structural parts such as plates, suspension structures, and wall bolts.

3.1.9

Cantilever structure the main structure of the attachment support, one end of which is welded to the attachment plate of the attachment support, and the other One end cantilever, the cantilever end bears the load of the platform, and supports the anti-tilting and anti-falling device, made of channel steel, Made of I-beam or steel plate.

3.1.10

Guide rail

It is set on the attached support or on the vertical main frame to guide the up and down track of the platform.

3.1.11

Hanging point

The lifting power equipment is connected to the suspension point on the attachment support.

3.1.12

Lower lifting point

The lifting power equipment is connected to the lifting point on the platform.

3.1.13

Platform height

The distance from the axis of the bottom bar of the platform to the axis of the top cross bar (guardrail) of the platform.

3.1.14

Platform width

The horizontal distance between the vertical axis of the vertical poles inside and outside the main frame of the platform.

3.1.15

Platform support span the distance between the center axes of two adjacent vertical main frames is also the distance between two machine positions from.

3.1.16

Cantilever height

The uppermost part of the platform has an anti-tilt function to effectively attach the height of the platform above the support.

3.1.17

Overhanglength

The horizontal distance from the center axis of the vertical main frame of the platform to the end elevation of the platform.

3.1.18

Anti overturning device A device to prevent the platform from overturning during lifting and use.

3.1.19

Falling proof device the braking device can be used when the platform is raised or lowered or accidentally dropped during use.

3.1.20

Synchronous control device in the lifting of the platform, the lifting speed of each lifting point and each machine position is controlled, and each lifting point A device that controls the load and height difference between them within the design allowable range.

3.1.21

Stopping device

Set on the attached support, when the platform stops on a certain floor, all load of the platform the load is transferred to the bearing device on the attachment support.

3.2 Symbols

3.2.1 Action and effect

3.2.2 Physical properties of materials and components

4.1 Classification

4.1.1 The vertical main frame and horizontal supporting structure of the protective platform shall be classified according to Table 1.

4.1.2 The structure and structure of the protective platform shall be classified according to Table 2.

4.1.3 The outer facade of the protective platform shall be protected by dense mesh safety nets and framed steel mesh the protective net or corrugated steel protective net shall meet the requirements of Table 3.

4.2 Main parameters and series

4.2.1 The main parameters of the protection platform shall meet the requirements of Table 4.

4.2.2 The product classification of the protection platform is shown in Table 5.The structure and structure of each series of products and the building structure See Appendix A for the schematic diagram of the attachment relationship.

4.3 Marking

4.3.1 Model establishment

The model is composed of name code, structure and structure classification code, and product serial number. Model table Shown as follows.

4.3.2 Model example

5.1 Performance

5.1.1 The materials and components used in the protection platform should have quality certificates or certificates, and Comply with product design regulations.

5.1.2 The purchased components should have the manufacturer's product qualification certificate.

5.1.3 The steel pipes used for structural fittings should adopt the general standard specified in GB/T 13793 or GB/T 3091.

Through steel pipe; its material should conform to Q235 grade steel in GB/T 700 or Q345 in GB/T 1591 Grade steel regulations. The allowable deviation of the outer diameter, wall thickness, and shape of the steel pipe shall meet the requirements in Table 6.

5.1.4 The materials of section steel, steel plate and round steel used in structural parts shall conform to Q235 in GB/T 700 Grade steel or Q345 grade steel in GB/T 1591.The attachment device and guide for the platform structure Rails, vertical poles, horizontal poles, main frame, horizontal supporting structure, upper and lower hanging points, anti-falling device Etc., steel with strength lower than Q235 should not be used.

5.1.5 The brake components of the anti-falling device should not be made of cast iron, but should be made of carbon cast steel.

Its performance should meet the requirements of GB/T 11352, and the material performance should not be lower than that of Q235 steel.

Requirement; the blocking wedge of the clamping anti-falling device should be quenched and tempered, and its surface hardness should be 30HRC~40HRC.

5.1.6 When the components of the protective platform are made of aluminum alloy, the material should meet the requirements of GB 5237 Regulations.

5.1.7 When the outdoor temperature is greater than or equal to -20°C, Q235 grade steel and Q345 grade should be used steel. The load-bearing truss or the structure subjected to impact load should have a combination of 0°C impact toughness Grid guarantee. When the outdoor temperature in winter is lower than -20°C, it should still have -20°C impact toughness.

Grid guarantee.

5.1.8 When the platform structure is erected with fastener-type steel pipe scaffolding, its materials and components shall be Meet the requirements of JG J130; when using portal steel scaffolding, its materials and components it shall meet the requirements of JG J/T 128; when the socket-type disc buckle steel pipe bracket is used for erection, its material Materials and components should meet the requirements of JG J231.

5.1.9 The connecting materials of the platform structure shall meet the following requirements.

a) The welding rod used for manual welding should meet the requirements of GB/T 5117 or GB/T 5118.

The type of electrode should be compatible with the mechanical properties of the main body of the structure.

The truss structure with dynamic load should adopt low-hydrogen electrode;

b) The welding wire and flux used for automatic welding or semi-automatic welding should be the same as the main metal of the structure the mechanical properties are compatible and should meet the requirements of GB/T 8110;

c) Ordinary bolts should meet the requirements of GB/T 5780 and GB/T 5782;

d) Anchor bolts can be made of Q235 grade steel specified in GB/T 700 or GB/T 1591 Made of Q345 grade steel.

5.1.10 The scaffold board shall meet the requirements of strength and deformation. Steel, aluminum alloy, wood the materials should meet the following requirements.

a) The material of stamping steel plate and steel mesh scaffolding plate should meet the Q235 level in GB/T 700 According to the steel regulations, the thickness of the steel plate of the stamped steel plate scaffold should not be less than 1.5mm.

The diameter of the inscribed circle of the hole should be less than 25mm, and the new scaffold should have a product quality certificate;

b) The solid wood scaffold board should be made of fir or pine, and its material should conform to GB 50005.

Regulations for grade II materials. The width of the scaffold should not be less than.200mm, and the thickness should not be less than 50mm, Two 4mm galvanized iron wires shall be used at both ends to be tied up;

c) The plywood scaffold should be made of ordinary water-resistant plywood of type II in GB/T 9846.3, with a thickness it should not be less than 18mm, the spacing between the bottom wooden beams should not be greater than 400mm, and the wooden beams are level with the scaffold the poles should be fastened with iron wires, and the plywood and wooden beams should be fastened with nails.

5.2 Process

5.2.1 The steel pipe or section steel rods should be straight, and the end faces at both ends should be flat, and there should be no oblique openings. Play when the parts have defects such as cracks, surface delamination, flattening, hard bends, deep scratches, scars, etc., do not should be used.

5.2.2 When the structural parts are welded and connected, a single rod is only allowed to have one welding seam, and when there are seams on the vertical poles or guide rails, the seams should be staggered at the intersection of the poles, the horizontal pole and the horizontal diagonal pole.

The seam should be arranged within 1/4 of the length from the end.

5.2.3 All parts should be deburred, sharp edges, etc.

5.2.4 The surface of the components and parts made of iron materials should be treated with rust prevention.

Parts should be lubricated. When steel pipe materials have openings or perforations, the inner wall of the pipe should be anti-rust deal with.

6.1 Basic design requirements

6.1.1 The protection platform design shall adopt the limit state design method based on probability theory, Calculate with partial coefficient design expression.

The structure and components of the protective platform shall be in accordance with the limit state of the bearing capacity and the limit state of normal use.

Design.

The rigging and spreaders of the lifting system of the protective platform shall be in accordance with the mechanical design regulations, Design by force method.

6.1.2 The protection platform shall be based on the force analysis and calculation of each component, the requirements of GB 50017 and GB 50018 design various structural parts to meet structural strength, Requirements for connection strength, rigidity and stable bearing.

6.1.3 The safety level of the protection platform is level I, and its structural importance coefficient should be taken as 0 = 1.1.

In the load calculation, the structural importance coefficient gamma0 should be included.

6.1.4 The design calculation of the protection platform shall meet the following requirements.

a) According to the building structure of the protective platform and the structure and structure of the protective platform, Factors such as installation, erection, use function, load, etc. determine the design calculation content;

b) The horizontal support structure adopts the protective platform of the space structure, which should be based on the force analysis Above, calculate the following items.

--The structure and component strength, stable bearing capacity, connection strength of the vertical main frame, and the deformation of the cantilever end of the top of the vertical main frame shall be checked;

--The structural and component strength, stable bearing capacity, connection strength and Cross-span deformation check calculation;

--The strength, connection strength and deformation of the platform structural members are checked, and the pole is stably bearing Force calculation

--The strength of the structural parts, the stable bearing capacity, the connection strength and the supporting point of the attached support Load capacity calculation;

--The carrying capacity of the lifting system and the selection and calculation of lifting equipment;

--Calculation of the carrying capacity of anti-tilt and anti-falling devices;

c) The horizontal supporting structure adopts a protective platform with a plane rigid frame structure, which shall be Based on the calcul...