seminar paper on Engineered demolition techniques for
Dilapidated
structures
–
case studies

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Engineered demolition techniques for
Dilapidated
structures
–
case studies

Demolition techniques designed for dilapidated structures :

1 Modern Demolition Techniques

• Hydraulic rock circuit breakers
• Sawing and drilling of diamonds
• Diamond wire sawing system
• Silent Expansive Chemicals
• Controlled demolition
• Hydralic shine
• Thermal pressure
• Hydraulic Demolition
(I.e.
• Robotics Demolition
• Cor Drilling - uses diamond tips with hydraulic / electric / pneumatic geodesic drilling motors - maximum diameter - 2000mm.

 Cable Saws: Ultimate Demolition Tool

In the wire saw a wire of diamond beads rises around the members of RCC, to be cut. The cable is rotated at a high speed (100Km / hr) by a special machine while constantly applying a pulling force. The diamond wire penetrates and cuts through the steel and concrete.

Water is used as a lubricating coolant. Wire sawing has limitations on the size of the RCC member to be cut. This technique is ideal for rapid primary demolition.

 Hand Saws

The Han saw uses a lightweight hand machine, with diamond blade to cut RCC in any direction. By this technique, even over the cut of the hand is possible. Max. The cutting depth is 150 mm.

Diamond Advantage

 Time: Diamond tools cut concrete fast, reducing Leeds downtime to early completion of the project.
(I.e.
Lim Liming Tolerance: Diamond cutting is precise and controlled, requiring little or no patch.
(I.e.
 Structural Integrity: Diamond cutting allows the removal of large amounts of concrete without damaging the rest or the surrounding structures.
(I.e.
 Noise, dust and debris: Diamond cutting is relatively quiet and virtually no dust can cut concrete pieces to the specified size to facilitate removal.
(I.e.
 Limited access: Diamond cutting techniques can be used in confined areas and arrows on existing equipment

Hydraulic Separators:

Creates enormous rales within the concrete, producing cracking of concrete.

Dismantling Tools

Manual machines

Crane mounted machines

 Special machine
Rob Robotic machine

Tools to be used for work in Haul

The following factors should determine the technique

 Volume of concrete to be dismantled
 Space available for the wall
 Risks involved
Acep Acceptable noise and vibration levels
(I.e.
Portable machines
(I.e.
 Electrically operated
 Battery Operated
 Pneumatic
 Hydraulic
Motor

Key Factors

General

 Weight
 Multifunction - Drill, Chip, Hammer Drill
(I.e.
 Ergonomics

Technical

 Energy from stroke
 Material removal per minute
 Tool mounting type
 Tool life
 Cost of Maintenance
 Safety features
 Durability

Advantages

• Easy to handle
• Unskilled labor may be used
• Ideal for disassembling small volumes
• Ideal for short term work
• Ideal for vibrations less chipping.

Disadvantages

• Requires great inuscular power
• Limited removal due to low hammer weight
• Small impact of small diameter chisel
• High labor cost
• Damage due to vibrations.
• Harmful to the blood vessels of the finger
• Danger from falling dust and debris