Heilongjiang Province Chimney Writing and Drawing Company Chimney Painting Aviation Logo Paint Unit

Heilongjiang Province Chimney Writing and Drawing Company Chimney Painting Aviation Logo Paint Unit

Chimney New Unit Project Construction Manual Machinery Demolition of Reinforced Concrete Chimneys
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complete qualification certificates.
Construction unit: Nanjing Yurun Group Suzhou Thermal Power Co., Ltd.
Construction unit: Jiangsu Jinfeng High-altitude Engineering Co., Ltd. Website:

Project name: Meter reinforced concrete chimney demolition project
/> Construction location: Nanjing Yurun Group Suzhou Thermal Power Co., Ltd.
Project manager: Liu Jie New technology consultation: Email: @
Jinfeng high-altitude engineering qualifications: Jinfeng official website:
Safety production license Certificate Level 1
Professional contracting for aerial work projects
Professional contracting for high-rise structure projects
Professional contracting for mechanical and electrical equipment installation projects
Professional contracting for anti-corrosion and insulation projects
Professional contracting for building waterproofing projects< br/> Each construction employee must have a high-altitude working certificate, electrician certificate, oxygen welder certificate, and an accidental injury insurance policy. The relevant certificate number is consistent with the ID number.
>Characteristics and targeted measures of the demolition project:


The height of the demolition chimney is up to 1 meter, the concrete of the barrel is made of Portland cement, the structure is strong, manual demolition requires Construction scaffolding is set up around the chimney. When erecting meters of circular wall-mounted construction scaffolding, if all floor-standing scaffolding is used, it cannot meet the safety technical requirements of fastener-type steel pipe scaffolding. The tools used for manual dismantling are mainly pneumatic picks, which are supplied with air through an air compressor. It is difficult to supply air directly from the ground.

Targeted measures:

Construction scaffolding with a height of up to meters shall be erected in sections. Floor-standing steel pipe scaffolding shall be used when the height is less than meters. Add I-beam brackets.

Fix the air duct outer steel pipe vertically to the construction scaffolding, which can ensure the air supply pressure and solve the problem of using air picks for manual dismantling.

When dismantling the chimney, the impact of dust must be minimized. Manual dismantling uses a pneumatic pick to crush the chimney from top to bottom, and the dust at high altitudes is relatively large.

Targeted measures:

Hang a green mesh safety net on the outside of the construction scaffolding. This safety net has a certain strength, which can not only reduce the impact of dust but also block debris. .

Safety risks are serious. When dismantling a chimney, the chimney can be divided into two parts. The parts above 1 meter can be dismantled manually, while the parts below 1 meter can be dismantled mechanically. All manual demolition operations are performed at high altitudes, which poses great safety risks.

Targeted measures:

The erection (dismantling) of scaffolding must be undertaken by scaffolders who have received safety technical education, and scaffolders must be certified to work. All personnel involved in chimney demolition construction undergo regular physical examinations. Those with hypertension, heart disease, etc. who are not suitable for working at heights are not allowed to work on scaffolding.

Lightning protection facilities were added during the scaffolding erection process.

Erect elevators for people and goods and set up corresponding isolation sheds.

No construction, including erection and dismantling of scaffolding, will be allowed in weather conditions above Category 1 wind.

No construction including erection and dismantling of scaffolding will be carried out during thunderstorms.

A manual dismantling plan

Construction sequence:

Construction scaffolding is set uprr people and cargo lifts are placedrrThe barrel is manually dismantled and dismantled to metersrr All construction scaffolding will be dismantled and replaced by mechanical dismantling (hydraulic shears and pickaxes).
>Construction method:

After erecting a fully enclosed steel pipe scaffolding from the ground to the top (meters higher than the chimney) and passing the acceptance inspection, manual dismantling will begin. Manual dismantling to the ground meter will be replaced by machinery. Demolition

Before manual demolition, use the ventilation opening as a slag outlet and use a small excavator to remove the slag.

The construction workers stand on the scaffolding, and after hanging the safety belt on the steel pipe, use a pneumatic pick and hand hammer to dismantle the cylinder piece by piece from the outside to the inside, so that all the ballast blocks fall from the inside of the barrel

Demolition operations are strictly prohibited at night, and slag cleaning can be arranged at night to facilitate continued demolition during the day. It is strictly prohibited to carry out demolition and slag removal at the same time

The scaffolding is lowered simultaneously with the lowering of the construction surface, but the scaffolding must always be kept meter to meter higher than the construction surface to prevent debris from flying out of the scaffolding protective layer

The oxygen acetylene bottle is placed on the work platform, with only the gas cutting gun on the construction surface, and the lightning protection antenna is burned out while dismantling it (the cutoff length is not more than one meter).

Main construction technology:

The main difficulty in manually dismantling rice chimneys is the erection of construction scaffolding. The erection of rice-shaped circular wall-mounted construction scaffolding cannot be satisfied if all floor-standing scaffolding is used. Safety technical requirements for fastener steel pipe scaffolding. It can be erected in sections, with floor-standing steel tube legs used below meters. For cantilevered sections above, I-beam brackets are added at meters meters meters meters.

Erection structure:

Floor-standing fastener steel pipe scaffolding.

The scaffolding is a double-row scaffolding with an erection height of meters. Double-tube vertical poles are used below meters, and single-tube vertical poles are used above meters. The erection dimensions are: center distance between internal and external poles, longitudinal distance between poles, The step height is, vertical and horizontal sweeping poles are set up from the ground, longitudinal blocking poles are set up at every height of the outer row of vertical poles, scissor braces are set across the vertical poles, and the angle between the inclined pole and the ground is between degrees and degrees. A dense mesh safety net is installed outside the scaffolding. The connecting wall rods of the frame and the barrel structure are equipped with a tie point in two steps and two spans. The tie points are hard tie knots. Each point is staggered in a plum blossom shape. The tie points at both ends should be strengthened.

Jiangsu Jinfeng High-altitude Engineering Co., Ltd.
Address: No. Xindu Road, Development Zone, Yancheng City, Jiangsu Province
Postcode:
Telephone:
Fax:< br/> General Manager: Liu Jiexin
Mobile:
Website:
Email: @