Fujian Province Chimney New Construction Company Chimney Maintenance Construction Unit Chimney Strengthening Manufacturer

Fujian Province Chimney New Construction Company Chimney Maintenance Construction Unit Chimney Reinforcement Manufacturer
Chimney New Unit Engineering Construction Manual Machinery Removal of Reinforced Concrete Chimneys
Fujian Province Fuzhou Manual Removal of Reinforced Concrete Chimney Construction Company, Putian Quanzhou Removal of Cement Concrete Structural Concrete Chimney construction unit, Xiamen Zhangzhou manual demolition of abandoned old brick chimney construction manufacturers, Longyan Sanming chimney reinforcement, repair and installation, Nanping
Ningde
Professional construction measures and construction plans for Mimi chimney projects, complete qualification certificates.
, construction unit Nanjing Yurun Group Suzhou Thermal Power Co., Ltd.
, construction unit Jiangsu Jinfeng High-altitude Engineering Co., Ltd.
, project name m reinforced concrete chimney demolition project
, construction location Nanjing Yurun Group Suzhou Thermal Power Co., Ltd. Hospital
Project manager Liu Jie New Technology Consulting
Jinfeng high-altitude engineering qualifications have
First-level safety production license
Professional contracting of high-altitude 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
Each construction employee has a high-altitude work certificate and an electrician certificate , oxygen welder certificate, and an accident insurance policy.
Characteristics of the demolition project and targeted measures
The height of the demolished chimney is up to 1 meter. The concrete of the barrel is made of Portland cement and has a solid structure. Manual demolition requires construction scaffolding 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 up to 1 meter in height should be erected in sections. Floor-standing steel pipe scaffolding should be used below 1 meter in height. For sectioned cantilevered erection above, I-beam steel brackets should be added at meters, meters, meters, and meters. shelf.
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.
. There are serious safety risks. 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 high blood pressure, heart disease, etc. who are not suitable for working at heights are not allowed to work on scaffolding.
Lightning protection facilities will be 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 during thunderstorms.
1. Manual dismantling plan
Construction sequence
Erection of construction scaffolding, erection of lifts for people and cargo, manual dismantling of the barrel and disassembly to 10 meters, dismantling of all construction scaffolding and use of mechanical dismantling (hydraulic shears and pick machines) Cooperate).
, Construction method
After erecting a fully enclosed steel pipe scaffolding from the ground to the top (higher than the chimney) and passing the inspection, manual dismantling will begin, and mechanical dismantling will be used instead of manual dismantling to the ground meter
Manual Before dismantling, 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, they use pneumatic picks and hand hammers 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
Strictly prohibited at night For demolition operations, slag cleaning can be arranged at night to facilitate continued demolition during the day. It is strictly prohibited to dismantle and clean the slag at the same time
The scaffolding will be lowered simultaneously with the lowering of the construction surface, but the scaffolding must always be kept at least 1 meter higher than the construction surface to prevent slag from flying out of the protective layer of the scaffolding
Oxygen and acetylene bottle placement On the working platform, only the gas cutting gun is on the construction surface, and the lightning protection antenna is burned out while dismantling it (the cut-off length is not more than one meter).
Main construction technology
The main difficulty in manually dismantling rice chimneys is the erection of construction scaffolding. When erecting rice-shaped circular wall-mounted construction scaffolding, if all floor-standing scaffolds are used, the safety technology of fastener-type steel pipe scaffolding cannot be met. Require. It can be erected in sections, with floor-standing steel tube foot frames below 1 meter, and cantilevered sections above that add I-beam brackets at meters, meters, meters, and meters.
Equipment structure
Floor-standing fastener steel pipe scaffolding.
The scaffolding is double-row scaffolding, and the erection height is meters. Double-tube vertical poles are used below meters, and single-tube vertical poles are used above meters. The erection dimensions are the distance between the center of the inner and outer poles, the longitudinal distance of the poles, and the height of the vertical poles. The height is set from the ground. Vertical and horizontal sweeping poles, vertical bars are set at every degree of the outer row of poles, scissor braces are set across the roots of the poles, the angle between the diagonal pole and the ground is between degrees and degrees, and a dense mesh safety net is set on the outside of 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
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General Manager Liu Jiexin
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