Huaian chimney demolition company

(1) information such as building layout provided by the owner.

(2) Requirements of demolition project on site survey data, site building and pipeline layout and surrounding environment.

(3) Ministry of Housing and Urban-Rural Development: Safety Operation Rules for Construction Machinery

(4) Technical Specification for Demolition of Buildings and Structures (DBJ08-70-98)

(5) Regulations of the Municipal Construction Committee and the Public Security Bureau on Fire Prevention in Construction Sites (for Trial Implementation).

(6) Technical Specification for Safety of Working at Height in Building Construction (JGJ80-9 1).

(7) Construction safety inspection standard JGJ59-20 1 1

Second, the project overview:

The chimney is 60 meters high and the bottom diameter is 6.5 meters. The first floor below the platform is a concrete structure, and the upper part is a brick external substructure (very rare). Due to serious corrosion, the top crack is serious, showing a big trumpet shape and may collapse at any time. Now it is planned to demolish the upper brick structure.

The environment around the chimney is narrow.

Characteristics and targeted measures of demolition project;

1. The height of the chimney to be demolished is 60m. The upward part of the first floor platform is brick structure. The barrel was badly corroded, and the top of the barrel was cracked in many places. The crack width is 4- 10 cm, which is in danger of collapse at any time. When the chimney is dismantled manually, it needs to be reinforced at the top of the chimney 2 meters. In order to avoid large vibration, the tools used for manual demolition are mainly electric hammers, which have relatively small vibration, rather slow progress and heavy workload.

2. When the chimney is demolished, the influence of dust should be minimized. Manual demolition is to smash the chimney from top to bottom with an electric hammer, and there is a lot of dust in the sky.

3. There is a big safety hazard, and manual demolition is aerial work, which has a big safety hazard.

4, 5 winds above the weather is not construction. Construction is prohibited in thunderstorm days.

Three. Manual demolition scheme

1, construction sequence:

Reinforce the top of chimney → erect safety protection facilities → pull the isolation belt on the ground.

2, the construction method:

(1) After the downward part of the top opening is reinforced, it will be removed manually;

(2) The constructors erect the chimney, hang the safety belt on the ladder, and then dismantle the cylinder block by block from the outside to the inside with a pneumatic pick and a hammer, so that all the ballast blocks can be removed from the cylinder;

(3) Demolition operation is strictly prohibited at night, and slag removal can be arranged at night, which is beneficial to continue demolition during the day. Blasting and slag removal are strictly prohibited at the same time;

Four, chimney demolition time limit for a project:

The construction period is tentatively set at 20 days.

Five, the construction safety guarantee measures

5. 1 construction preparation stage

1, safety planning, in line with existing regulations, meet the relevant safety rules issued by the Ministry;

2. Formulate on-site safety, labor protection, civilized construction and environmental protection measures, and prepare temporary electricity utilization plans;

3. Take corresponding protective measures for the construction area and the affected area;

4, the implementation of the construction of mechanical equipment safety measures, equipment and protective equipment plan;

5. Before construction, make disclosure of relevant safety rules to relevant construction personnel.

5.2 in the process of construction

1, be familiar with the site before taking up the post;

2. When employees enter the construction site, they must wear safety helmet, protective glasses, work shoes, uniform work clothes and personal labor protection articles correctly;

3, between each type of work shall not string post operation, mechanical operation in strict accordance with the specification, shall not be illegal operation;

4, temporary electricity on the construction site, strictly implement the relevant provisions of the three-dimensional group, the use of two-phase electricity, the use of safety distribution box; Wear smart clothes for aerial work, and it is forbidden to wear hard-soled, nailed sliding shoes;

5. Do a good job of acceptance and shelving, and employees must fasten their seat belts and take root when posting;

6. Eye-catching safety warning signs shall be set in the construction area, and the dangerous construction area shall be enclosed with red and white belts to ensure that the unloaded concrete and sundries are not leaked; ;

7, cutting steel bar should be carried out in strict accordance with the construction plan, shall not be blind construction without authorization; Enhance the safety awareness of self-protection and mutual protection, and do not cross-operate in the lightering and cutting areas;

8, construction personnel unit area after the completion of the requirements left hand clear. After inspection, leave the job site only if there are no subsequent hidden dangers.