Home | | Repair and Rehabilitation of Structures | Engineered demolition techniques for dilapidated structures

Chapter: Civil : Repair and Rehabilitation of Structures : Techniques for Repair and Demolition

Engineered demolition techniques for dilapidated structures

Modern Demolition Techniques: Hydralic Rock Breakers Diamond sawing and Drilling Diamond wire sawing system Silent expansive chemicals Controlled Demolition Hydralic Brusting / Spliting Thermal lancing Hydro demolition Robolic demolition


Engineered demolition techniques for dilapidated structures

 

1 Modern Demolition Techniques

 

        Hydralic Rock Breakers

        Diamond sawing and Drilling

         Diamond wire sawing system

        Silent expansive chemicals

        Controlled Demolition

        Hydralic Brusting / Spliting

        Thermal lancing

        Hydro demolition

 

        Robolic demolition

        Cor Drilling - uses diamond tipped bits with hydraulic/electric/pneumatic geode drill motors - maximum dia - 2000mm.

Wire Sawing : Ultimate Demolition Tool

 

In wire sawing a diamond beaded wire is reared around the RCC members, to be cut. The wire 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 RCC member, to be cut. This technique is ideal for fast primary demolition.

 

Hand Sawing

 

Han sawing uses a light weight hand held machine, with diamond blade to cut RCC in any direction. By this technique, even over hand cutting is possible. Max. Depth of cut is 150mm.

 

Diamond Advantage

 

Time : Diamond tools cut concrete fast, reducing down time which Leeds to early project completion.

 

Limensional Tolerance: Diamond cutting is precise and controlled, little or no patching s required.

 

Structural Integrity : Diamond cutting allows removal of large amounts of concrete without damaging, remaining or surrounding structures.

 

Noise , Dust and Debris: Diamond cutting is relatively quiet and virtually dust free concrete pieces can be cut to specified size for easy removal.

 

Limited Access: Diamond cutting techniques can e used in confined areas and arrows existing equipment

 

Hydraulic Splitters/Busters:

 

Creates enormous sresses within concrete, producing tensile cracking of concrete.

 

Dismantling Tools

 

Hand Operated Machines

 

Crane Mounted machines

 

Special Machine

Robotic machine

 

Tools to be used for job on Haul

 

The following factors should determine the technique

 

Volume of  concrete to be dismantled

Space available for walling

Risks involved

Acceptable noise and Vibration levels

 

Hand Held Machines

 

Electrically Operated

Battery operated

Pneumatic

Hydraulic

Engine

 

Key Factors

 

General

 

Weight

Multifunction - Drill, Chip, Hammer Drill

 

Ergonomics

 

Technical

 

Energy Per Stroke

Material Removal Per minute

Tool Mount Type

Tool Life

Maintenance Cost

Safety Features

Durability

 

 

Advantages & Disadvantages of Hand Held Machines


Advantages

Easy to Handle

Unskilled labour can be used

Ideal for dismantling small volumes          

Ideal for short term jobs

Ideal for vibration less chipping.

 

Disadvantages    

Requires great inuscular power

Limited removal due to low hammer weight

Little impact from small diameter chisel

High labour cost

Harmful box due to vibrations.

Harmful to finger blood vessels

Danger from dust & falling debris


Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
Civil : Repair and Rehabilitation of Structures : Techniques for Repair and Demolition : Engineered demolition techniques for dilapidated structures |


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2023 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.