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Demolition of building

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DEMOLITION:-Demolition is the process of tearing down or falling down of a building after its life period with the help of some equipments or any other method. When explosives are used for this then the demolition process are called as an implosion. Every civil engineering structure is designed for a life period. After that the existence of a structure is very dangerous. So removal of such structures with proper safety measures has got great importance. There are different steps involved before and during the time of a demolition activity.

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Demolition of building

  1. 1. SEMINAR PRESENTATION ON DEMOLITION OF BUILDINGS GUIDED BY:- SUBMITTED BY:- Dr.AJAY BINDLISH CHANDRA SHEKHAR PRAJAPAT Associate Professor CRN :- 11/321
  2. 2. Introduction  Deliberate destruction of structures and materials by means of  Mechanical Equipments  Explosives
  3. 3. Demolition of Building
  4. 4. STEPS BEFORE DEMOLITION  Surveying  Removal of hazardous materials  Preparation of plan
  5. 5. SURVEYING  Study of different parameters of the structure and its surroundings.  Record Drawings  The construction materials  Adjoining properties and site conditions  Available site area to demolition
  6. 6. REMOVAL OF HAZARDOUS MATERIALS  Asbestos containing material  Soil contamination material
  7. 7. PREPARATION OF PLAN  The location of the building to be demolished  A layout plan of all floors of the building to be demolished  The structural support systems  Time and frequency  A temporary parking layout for mobile machines and trucks
  8. 8. Emergency exit  properly protected  free of obstruction  properly marked with exit signs
  9. 9. METHODS OF DEMOLITION PIECEMEAL DEMOLITION MECHANICAL METHOD EXPLOSIVE DEMOLITION
  10. 10. EXPLOSIVE DEMOLITION Blasting machines Blasting cap or electrical detonator
  11. 11. Advantages of EXPLOSIVE DEMOLITION :-  Less expensive  No ground vibrations  Quickest method  Suitable for multi-storyed / high piers, cabins, distressed piers etc.
  12. 12. How building implosion works??
  13. 13. Placing the Explosives
  14. 14. DEMOLITION Concrete Columns Steel Columns
  15. 15. Blasting the Explosives • Use of blasting caps. • Lead line.
  16. 16. Columns Fully Loaded with Explosives and Hooked up to Blasting caps
  17. 17. Test Blast
  18. 18. CONCLUSION Demolition method applied in a structure depends upon various factors such as site condition, type of structures, age of building, height of building and economy and most important its location with presence of its surrounding with its structural stability. Controlled demolition of building is necessary to ensure safety of both the workers and the surroundings so as to cause least amount of injuries and accidents.
  19. 19. Thank you…

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