How to install all-steel climbing frame? What regulations should the construction meet?

A, attached lifting scaffolding (climbing) construction technology

1, before the erection of climbing frame, the plane position and elevation of bolt holes or embedded parts, the aperture and verticality of bolt holes are reserved during the construction of engineering structure. , should also be verified. The reserved holes should be perpendicular to the outer surface of the structure. When the requirements cannot be met, reasonable and feasible remedial measures should be taken.

2, climbing frame before installation, should set up a safe and reliable installation platform to bear the vertical load during installation. The installation platform should have safety protection measures. The horizontal accuracy of the installation platform should meet the requirements of the installation accuracy of the frame body, and the maximum height difference between any two points should not be greater than 20 mm

3. Assemble the climbing frame on the ground:

Use skids to elevate the lower section and standard section of the main frame, and tighten the bolts (M 16×50, M 16×90).

Washers, and tighten all bolts. Note: when splicing, the guide rails between every two sections should be aligned;

Assemble the guide device and install it in the corresponding position;

Fix the bracket (auxiliary supporting structure) on the corresponding connection position of the main frame and fasten it.

4, climbing frame hoisting:

When the concrete strength of the structure meets the design requirements, the bearing is reliably connected with the structure;

Hoist the spliced main frame with hoisting equipment, and the hoisting point is located at the upper position of 1/3;

According to the requirements of the climbing frame scheme, the main frame is temporarily fixed on the building structure;

Install the bottom truss and install the frame body.

Hoisting of climbing frame

Climbing frame after hoisting

6. Precautions:

1) during installation, the installation deviation between the horizontal beam frame and the vertical main frame should be strictly controlled. The elevation difference between two adjacent lifting points of the horizontal beam frame of the frame body should be less than 20mm；; The horizontal height difference between two adjacent vertical main frames should be less than 20mm；; The vertical deviation between the vertical main frame and the anti-tilting guide device should be no more than 5‰ and 60mm；;

2) During installation, reliable temporary horizontal support measures should be taken between the frame body and the engineering structure. Ensure the stability of the framework;

3) The erection quality of fastener scaffold erection frame should meet the requirements of relevant standards;

4) Pre-tightening torque of fasteners, bolts and nuts should be controlled within the range of 40~60N. m；

5) The length of the outer side of the fastener at the end of the scaffold shall not be less than 100mm, and the exposed length of the end of the small bar at the outer side of the frame shall not be less than100 mm;

6) The erection of operation floor and safety fence facilities shall meet the design and use requirements. When the scaffold is close to the high-voltage line, corresponding protective measures must be taken.

Second, the attached lifting scaffolding (climbing frame) debugging and acceptance after installation

Upon completion of scaffold erection, relevant departments shall be organized to debug and inspect the following items together with the scaffold climbing unit, and detailed written records shall be made for debugging and inspection:

1. For the frame structure set up with fastener scaffolding, the fastening quality of fasteners should be checked by 50%, and the qualified rate should reach over 95%;

2. Check all threaded joints;

3. Carry out the frame lifting test to check whether the lifting equipment operates normally;

4. Check the overall protection of the frame body;

5. Other necessary inspection and debugging projects. The frame can only be put into use after it has passed the debugging and acceptance.

Three, the use of attached lifting scaffolding (climbing frame)

1, climbing frame hoisting

The general idea of hoisting: plug in the anti-falling pin, hoist the hoisting bracket to the top floor and fix it, disassemble and adjust the top support, adjust the electric hoisting equipment and preload it, unplug the bearing pin of the bearing bracket and loosen the anti-falling device. Lift the frame body, insert the anti-falling pin into the upper part of the bracket, install the bearing pin on the bearing bracket, install the adjusting top bracket on the anti-falling bracket, and lock the anti-falling device to use.

2. Preparation before climbing and erecting the crane

The person in charge of safety technology shall make safety technical disclosure to the climbing and hoisting operators, define the division of labor, put the responsibilities in place, and record and sign. According to the division of labor, clean up the live load on the frame, the connection between sundries and buildings and obstacles, install electric lifting device, connect power supply, conduct no-load test, check the anti-falling device, and prepare operating tools, such as special wrench, hammer, jack and crowbar.

Before lifting the climbing frame, the climbing frame must be thoroughly inspected. Detailed written records include:

(1) The actual strength of the concrete attached to the supporting structure has reached the scaffold design requirements;

(2) All the nuts at the bolt joints have been tightened;

(3) The live load that should be removed from the construction has been evacuated;

(4) All obstacles have been removed and all unnecessary restrictions have been lifted;

⑤ The electric lifting system can work normally;

⑥ All relevant personnel have been in place, and all irrelevant personnel have been evacuated;

⑦ All reserved bolt holes or embedded parts meet the requirements;

⑧ All anti-falling devices are functioning normally;

Pet-name ruby all safety measures have been implemented;

Attending other necessary inspection items;

When one of the above-mentioned inspection items is unqualified, the hoisting operation should be stopped, and the operation can only be started after the reasons are found out and the hidden dangers are eliminated.

3, climbing frame ascension

Personnel in place, shelf operation personnel organization: take several single-chip cranes as an operation group, with unified command, clear division of labor and responsibilities. There is a 1 team leader who is responsible for overall command; There are 1 operators, who are responsible for the management, operation, debugging and maintenance of electrical equipment; In a project, according to the requirements of the construction period, several operation groups can be organized to hoist the frame body at the same time. It takes about 45 minutes for the operation team to complete the hoisting of a frame.

In the process of hoisting, the command must be unified and standardized, and necessary patrol personnel must be equipped.

Operating steps of electric lifting device:

4. Inspection and acceptance after climbing frame hoisting

The inspection and acceptance contents include:

(1) Check whether the removed bolts and nuts are really screwed in place according to the torque, and check whether there are bolts that are not installed; Whether the temporary scaffold pole removed from the frame and the connecting pole with the building overlap as required, and check whether the scaffold pole and safety net are closed as required;

(2) Check whether the supporting pin and top brace are installed in place;

③ Check whether the fall arrestor is locked;

(4) After the frame body is hoisted, the person in charge of climbing frame construction shall organize a careful inspection and acceptance of all parts of the frame body, and each cross frame body shall have inspection records, and the existing problems must be rectified immediately;

(5) After passing the inspection and meeting the use requirements, the person in charge of climbing scaffold construction shall fill in the Inspection and Acceptance Form for Attached Lifting Scaffold Construction, which shall be signed and sealed by both parties before being put into use in the next step.

5, matters needing attention in the process of ascension.

1) In the process of lifting, if there is any abnormality, the lifting must be stopped immediately for inspection, and the lifting can be continued only after the cause is thoroughly found out and the fault is eliminated. Every abnormal situation should be recorded in detail in writing.

2) When the lifting force of the whole electric climbing frame is not synchronous (the height difference between two adjacent main frames is greater than 50mm), it will be adjusted by inching the control cabinet.

3) When the climbing frame of adjacent tower cranes and construction elevators is lifted, tower cranes, construction elevators and other equipment shall be suspended.

4) After lifting in place, the climbing frame must be fixed in time. Climbing operators are not allowed to change shifts or get off work before the fixed work is completed and delivered.

6, the use of climbing frame

Precautions:

1) Tracks shall not be overloaded, and small and overweight concentrated loads shall not be used. For example, a pool filled with concrete curing water is set up, and materials are piled up centrally;

2) The following illegal operations are strictly prohibited: it is strictly forbidden to overload, and it is strictly forbidden to fix formwork support, cable wind rope and conveying pipe for pumping concrete and mortar on scaffolding; It is forbidden to hang lifting equipment at will, dismantle structural parts or loosen connectors, dismantle or move safety protection facilities on the frame, and collide or pull scaffolding when hoisting components; The material table in use is still connected with the frame body; Pushing a cart on the scaffold;

3) Climbing frame through-wall bolts shall be tightened firmly (torque is 700~800N.m). Detection method: An adult worker uses 1.0m afterburner to tighten the bolt by its own weight until it is tightened.

4) During construction, the connecting bolts of the frame and the climbing frame shall be checked regularly. If the connecting bolt is loose or the frame is deformed, it should be handled in time.

5) Before each hoisting, the through-wall bolts must be strictly checked. If cracks are found or the threaded ring is damaged, it must be replaced.

6) Clean up the sundries, rubbish and obstacles on the shelf in time.

7) Bolt connectors, lifting power equipment, anti-tilting devices, anti-falling devices and electric control equipment shall be maintained at least once a month.

8) Climbing, hoisting and dismantling are prohibited in severe weather such as strong wind, heavy rain, heavy snow and fog with level 5 or above. Necessary reinforcement measures or other emergency measures should be taken in advance for the climbing frame. For example, the cantilever part of the upper part of the frame body is tied to the building with steel pipes and fasteners, and all construction live loads on the frame body are evacuated. It is forbidden to lift the climbing frame at night.

9) When the attached lifting scaffold is stopped for more than 3 months, reinforcement measures should be taken in advance; Such as adding temporary Rachel, anti-overturning device and fixing all components. , to ensure safety during downtime; Scaffolding should be inspected and used when it is stopped for more than 1 month or resumed after encountering a gale of magnitude 6 or above.

7. Inspection and maintenance during operation:

1) During the construction period, after each concrete pouring, the impurities on the surface of the guide frame pulley must be removed in time to make the guide rail move freely up and down.

2) For the repair and maintenance of the electric lifting device, please refer to the operating instructions of the electrical system of the climbing frame.

Books.

3) Inspection and maintenance of fall arresters

(1) The rotating parts are flexible, and hard collision is strictly prohibited.

(2) During use and storage, attention should be paid to fall prevention, waterproof and rust prevention.

③ The sensitivity must be checked before each use.

8. Removal of attached lifting scaffold (climbing frame)

The descending process is the inverse of the ascending process.

Four, attached lifting scaffolding (climbing frame) demolition principle

(1) The order of dismantling the frame body is to build it first and then dismantle it. It is forbidden to dismantle the frame body according to the erection procedure;

(2) When dismantling the frame body, make it clear step by step. It is not allowed to dismantle the scaffolding laid in more than two steps at the same time, and the safety net on the outside of the frame body should be dismantled step by step with the frame body, which is another relatively safe working state for the operators;

(3) When each bar or component is dismantled, it shall be firmly tied with ropes and slowly placed on the ground, roof or floor, and all kinds of materials and tools on the scaffold shall not be thrown;

(4) Dismantled members and bars shall be piled up by classification, and transported out of the construction site in time for centralized cleaning and maintenance for reuse;

⑤ Demolition should be carried out during the day. In case of gale of magnitude 5 or above, heavy rain, heavy snow, dense fog, thunderstorm and other bad weather, the demolition operation shall not be carried out.

Five, attached lifting scaffolding (climbing frame) mandatory provisions of the construction specification

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★★★★ 4.4.2 The structural dimensions of the attached lifting scaffold shall meet the following requirements:

1. The height of the frame shall not be more than 5 times the height of the floor;

2. The frame width shall not be greater than1.2m; ;

3. The supporting span of the frame arranged in a straight line shall not be greater than 7m, and the outer distance of the frame at the supporting point of the adjacent main frame shall not be greater than 5.4m； for the frame arranged in a broken line or curve;

4. The horizontal cantilever length of the frame is not more than 2m and not more than 1/2 span;

5. The product of the total height of the frame and the supporting span shall not be greater than110m2.

4.4.5 Attached support structure includes wall-attached support, cantilever beam and diagonal tie rod, and its structure shall meet the following requirements:

1, each floor covered by the vertical main frame shall be provided with wall-attached support;

2. When in use, the vertical main frame should be fixed on the wall-attached bracket;

3, in the state of ascension, the wall bearing should be equipped with anti-tilting, guiding structure device;

4. The bearing attached to the wall shall be connected to the building with anchor bolts. There should be no less than two nuts for the tension bolt, or a spring washer and a single nut should be used. The length of the exposed nut end of the screw is not less than 3 buttons and not less than 10 mm, and the size of the pad is determined by the design and not less than100mm×100mm;

5. The concrete strength of the joint supported by the wall-attached bearing on the building should be determined according to the design requirements, but it should not be less than C 10.

4.4.8 The cantilever height of the frame body should not be greater than 2/5 of the height of the frame body and should not be greater than 6m.

4.4. The10 material platform shall not be connected with all components and structural members attached with lifting scaffolding, and its load shall be independently and directly transferred to the building engineering structure.

4.5. 1 Attached lifting scaffolding must have safety devices for overturning prevention, falling prevention and synchronous lifting control.

4.5.3 Anti-falling devices must meet the following requirements:

1. The fall prevention device shall be set on the vertical main frame and attached to the building structure. Each lifting point should have at least one anti-falling device, which must work under the conditions of use and lifting;

2. The anti-falling device must be a mechanical full-automatic device, and it is forbidden to use manual devices that need to be reorganized every time;

3. The technical performance of the fall arresters shall meet the requirements of bearing capacity, and shall also comply with the provisions in Table 4.5.3.

4, anti-falling device should have dust, pollution prevention measures, and should be sensitive and reliable, easy to operate;

5, anti-falling device and lifting equipment must be independently fixed on the building structure;

6. For the steel boom type anti-falling device, the specifications of the steel boom shall be determined by calculation, and shall not be less than ∮25mm.