The need for controlled demolition has increased as it is far more beneficial than conventional demolition techniques. Demolition requires advanced tools and equipment; otherwise, it can be hazardous for the workers and surrounding areas.
Be it your old building demolition or structural damage. Diamond drilling Kent ensures that you get hassle-free controlled demolition services. We take care of pre-demolition services such as removal of hazardous materials, survey, and preparing for the demolition plan for the building which needs to be demolished.
What is Controlled Demolition?
Destroying a building or construction is not easy; it involves risks for the workers; that’s why health and safety are essential during the procedure. Controlled demolition takes down buildings and structures with the guidance of experienced demolition experts. Controlled demolition techniques are safe for your facility and promptly give you the best results.
It is generally performed in various stages to gain maximum control and stability. It cannot be carried out in a day, so when the process begins, diamond drilling Kent divides the building into sections to ensure the smooth demolition process.
The Process of Controlled Demolition
When you go ahead with a controlled demolition project, it first requires you to go through a pre-demolition process. It includes surveys and evaluations of your building.
The survey includes –
- Drawing records
- Identifies the material used and removes hazardous material, including flammable material
- Photographs of the existing condition of the building and surrounding areas with its analysis
- Height of the building and its distance from the nearby buildings
- Drainage condition
- Building type
- Impact of demolition
After the survey, the next stage is to remove all the hazardous materials from the site. A team of experts creates your demolition plan; it includes detailed information about the location, neighbouring structures and the techniques used in the process. A demolition plan only comes into existence after the survey is completed.
Various Controlled Demolition Techniques
Manual demolition or hand demolition breaks small structures in populated areas. As the name suggests, it is performed by labourers as the large machinery cannot reach the confined or crowded space. Tools such as hammers, wire cutters, hand-driven hydraulic jacks, picks and welding cutters are used in manual demolition. The approach for this demolition technique remains top to bottom.
This method does demolition of the building from top to bottom. Before the operation begins, the distance of the nearest road from the building is calculated so that the team can accurately estimate if it is possible to allow debris to fall freely from the top floor.
Wrecking Ball Method
The wrecking ball method, also known as the crane demolition method, is the most common technique used to demolish concrete structures. This method uses two main approaches: the wrecking ball’s vertical drop and the wrecking ball’s swing action. The ball’s weight is around 13,500 pounds; it is hung on a cable from a crane. The technician either dropped the ball or swung it into the structure with repeated blows.
Both the techniques require highly skilled, qualified and experienced crane operators to carry out the demolition task. If the operators miss the target, then it may cause an overload for the crane. Wrecking ball demolition creates a significant amount of dust, noise, and vibration. Crane’s size determines the size of a building which can be demolished with this method. However, the ruined building must have an open space for the crane to move freely.
Pusher Arm Technique
The pusher arm technique uses a hydraulic excavator, pushing the building from the outside. The machine is mounted on a tracked or wheeled chassis and has a rigid base for operation from the ground. The distance from the building to the road should be a minimum of 6 meters. If one or more buildings are connected, the building which needs to be demolished gets separated from the adjacent construction by manual demolition. This method is not preferable for large structures.
Concrete Sawing Method
The method helps build demolition or building repair. It produces minimum noise, vibration and dust. It makes an opening in a wall or slab and breaks the concrete. There are three methods of concrete sawing,
- Wire saw cutting – Suitable for foundation concrete.
- A diamond disc cutter – Helpful to cut through concrete, brick, asphalt, and brick.
- Diamond core boring – Useful for nuclear power plants.
Deliberate Collapse Method
This method removes the building’s vital structural aspects, such as explosive charges, so the structure is deliberately lowered. Deliberate collapsing can only be used if the building which needs to be demolished is isolated from the neighbouring building; it is not helpful for pre-stressed concrete structures.
Pressure Jetting Method
This method uses a water jet for demolition; It is released from the nozzle with high pressure toward the concrete structure. It cuts concrete due to abrasion. The area to be broken by the water jet must be shielded so that it does not damage the property. Operators ensure that the water being used during the process is recycled.
In the implosion technique, external pressure is more significant than internal pressure, so the object falls inward. It uses explosives to knock down the building’s major vertical supports, resulting in the building collapsing itself from the inside out. For a successful demolition, the placement of the explosive and its sequence are the most critical aspects. This technique is often used in urban areas to demolish large structures.
CA Drillers identifies complete structural blueprints and determine the main parts of the building that need to be blasted. Additionally, the team also identifies other areas if it needs demolition. After figuring out all these, we determine the explosive needed to finish the job, where to position it in the building, and how much time will be required to complete the demolition.
Pile hacking, also known as the hydraulic jack method of demolition, is a considerably new technique that demolishes vertical structures such as columns and piers. This method uses a machine such as a hydraulic breaker and air compressor. It breaks the bond between the concrete and the steel bars and chops the concrete into small debris. It is one of the fastest methods of demolition.
Bursting dismantles buildings by creating force from outside of the building. There are two types of bursting: one is static bursting, and the other is dynamic bursting.
- Static Bursting – burster with wedges, expansive chemical demolition
- Dynamic Bursting – water gun, gas cylinder, cardox, mild explosive, explosives
Bursting is used extensively to demolish large residential or commercial buildings. It can break down concrete, masonry and stone structures in the safest manner.
CA Drillers guarantees high-quality controlled demolition services at an economical price in London and Kent. Call us on 08082581260 or visit us online. Our experts would be happy to help you with all your drilling requirements.