Chimney demolition construction plan

1. Construction unit:
Second, construction projects:
48m brick chimney removal to restore the original height enlargement caliber three, construction site:
Overview of the four brick and chimney demolition projects in the production plant area:
1. The brick chimney is removed 48m high and the caliber is 1.4m.
2. Due to the need of production, the caliber of the brick chimney has not reached the demand and must be improved.
3, in order to allow the brick chimney to be removed to meet the demand, the caliber reached 2.3m.
4. Remove the brick chimney by 30m and rebuild the enlarged diameter.
5, the brick chimney removal rate of 1:1.25, is now changed to a ratio of 1:1, reaching 48m is 2.3m caliber.
6. In order to allow the chimney to reach the design strength, after the heightening is completed, the outer wall is plastered and then reinforced, including the vertical ribs.
7. After the masonry is raised, the upper and lower reinforcement hoops are 1 meter per meter, and the vertical reinforcement bars are 48m and 8 pieces.
Fifth, the brick chimney demolition construction plan:
1. The construction personnel enter the site and first check the climbing ladders one by one.
2. Since the chimney cannot be stopped during construction, it is under construction without stopping production.
3. The company adopts the method of non-stop production without scaffolding.
4. Firstly, the brick chimney is removed from the upper and outer diameters to make the installation hoop type bracket hoop.
5. Weld the fixed angle iron buckle on the hoop at a distance of ninety centimeters.
6, the production of triangular support is 80 cm long, one of which is hooked in the angle iron buckle, surrounded by support.
7. Use a 40×400×2000 specification wooden board to be leveled on the triangular support and fixed with ropes.
8. The construction operator is under the premise of wearing a seat belt, the seat belt is fastened on the ladder, and the operator is removed on the suspended scaffold.
9. The dismantling tool uses tools such as electric hammer, sledgehammer, chisel, etc., and the two of them cooperate to push down the brick chimney.
10. Remove the waste and land directly from the air.
11. After removing from a height of 48m to a height of 18m, clean the top and rinse the elevation plane with water.
12. First, pour the inner ring beam together before the heightening.
13. Insert φ8, 12 anti-seismic vertical bars on the ring beam.
14. Red bricks used for masonry red bricks must be made into shaped bricks to ensure the proportion of horizontal and vertical gaps in brick joints.
15. When the height is increased, the φ6.5 anti-seismic ribs are added to the reinforcing bars per meter, and the seismic cracking resistance is designed according to the 7 degree.
16. Masonry mortar is built according to 10M mortar.
17. The red brick used must be enough water to drink enough water one day in advance to ensure the firm strength of the gray joint.
18. Metal components such as lightning rods, lightning protection lines, and ladders are installed as they are.
19. After the masonry is completed, the outside of the chimney avoids 15M cement mortar plastering, the thickness is 3 cm, and the appearance is smooth and flat.
20. After the cement mortar is finished, the reinforcing hoop is 48, and the vertical rib is 8. The metal components must be rust-proof and anti-corrosion.
21. Such a complete 2.3-meter-diameter chimney is completed and meets the design requirements of the factory, with a smoke emission of 180,000 m3/h.
22. The original design of the brick chimney was selected from the National Standard Atlas "00G211 (3)" 50/1.4-0.5-400 91 pages, and the reinforcement map is 105 pages.
23, the current heightening according to the national standard atlas "04G211-50/2.0-0.55-250" 44 page chimney body diagram, the reinforcement map according to 88 pages construction.
24. Brick chimney removal is designed according to the 400 degree exhaust temperature. The masonry is designed according to the 250 degree exhaust temperature on page 44. The heightened part is made of acid-resistant mortar inner wall for anti-corrosion, which is both anti-corrosive and temperature-resistant. 25, the lower part of the 18m part of the chimney will be on October 1st, and the anti-corrosion of the inner wall acid-resistant mortar will be carried out again.

To antiseptic effect.
26, chimney painted color ring or factory standard, negotiate with the manufacturer, and then determine the design pattern.
6. Total amount of brick chimney demolition works:
1. Remove the height of the chimney by 30m.
2, re-laying heightening 30m
3. Install 2 lightning rods.
4. 40 layers of anti-seismic stirrups are used in the masonry wall.
5. Pour the cement ring beam two (starting the masonry and the top part).
6. Add 8 earthquake-resistant vertical bars to the wall.
7. Newly installed lightning protection line 50m.
8. Install the ladder 30m.
9. The outer wall of the chimney is painted with cement mortar 573m2.
10, reinforcement hoop 50 × 5 flat iron 48.
11. Strengthen the vertical ribs by 48m×8.
12, the inner wall acid-resistant mortar anti-corrosion 460m2.
13, the outer wall painted color ring or factory standard.
Seven, brick chimney removal security measures:
1. Construction safety protection measures must be implemented conscientiously: the principle of “prevention first”, construction personnel should strictly implement the following provisions according to the current situation.
2. The ascending personnel must hold the special worker operation certificate and hold the employment certificate.
3. The ascending personnel must go through the company to insure the insurance company.
4. Party B's construction personnel must accept the safety education of Party A's relevant safety supervision department after entering the site.
5, as a high-level workers must be healthy, suffering from mental and high blood pressure, heart disease and other diseases that should not be engaged in high-altitude operations are not allowed to participate in high-altitude operations.
6. Ground personnel must wear safety helmets when entering the site, and high-altitude workers must wear seat belts.
7. There must be a full-time safety guardian. The main passage junction has a special person to look after, and there is a warning sign in the place where objects are easy to fall.
8. All construction tools are suspended by ropes and delivered in bags, so as not to harm others, not to be hurt by others, and not to hurt themselves.
9. All construction personnel strictly abide by the factory rules and regulations. All safety measures must be approved by the factory safety department to ensure the safe and smooth construction of the entire project from top to bottom.


'Chimney demolition heightening construction plan

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