Demolition of buildings (Demolition Melbourne) has become commonplace, as buildings have
collapsed due to natural causes such as earthquakes and human factors, such as
labor shortages, and a wider phenomenon has begun to emerge. Recently, two
large buildings in the city of Kiambu have collapsed, and Haiti is currently
experiencing a strong earthquake.
Local authorities did not
implement building codes in Haiti's 2010 [Rie's 7.0] and China-Sichuan-2008
seismic design factors [size 7.9 because earthquakes cannot kill humans, so
disasters are widely attributed to disasters. .. only poorly designed buildings
can do this.
Well-designed buildings have good
seismic load factors and can withstand any typical earthquake without dying. In
areas with unstable earthquakes, the seismic load factor must be high and the
government has the responsibility to ensure that these building codes are
respected by appropriate local authorities. For example, the seismic load
factor of Nakuru in the Rift Valley should be higher than Nairobi.
Demolition
Melbourne- Demolition method
If people are still trapped inside
a building, it is important to carefully choose the method of removal so as not
to harm the trapped person. During the earthquake in Haiti, only about 70
people were alive and more than 100,000 died. These data show that a quick
response to the release of trapped people in collapsed buildings is very
helpful in saving lives. The method chosen must be implemented very quickly,
inexpensive and does not require special manpower.
1. Pneumatic and hydraulic circuit breakers
These apply to the removal of
pavements, roads and reinforced concrete slabs. They can be mounted on a
backhoe or hand shovel. Factors such as the size of the hammer and the strength
of the reinforced concrete will determine the speed at which the work will be
removed. The main disadvantage of this method is that it requires specialized
machines, skilled labor and produces noise, dust and vibration.
2. Pressure explosion: mechanical bursting and chemical bursting
There are two types of pressure
explosions: mechanical explosions and chemical explosions.
Mechanical explosion: In this
method, a hydraulically operated splitter is inserted into the hole of the
concrete slab and the slab is forced to rupture.
Chemical explosion: In this
method, the cracking agent is mixed with cold water to form a grout, and the
grout is poured into a hole previously drilled in the concrete. It undergoes a
chemical reaction [hydration] and begins to expand, applying a pressure greater
than 500 kg / cm2, which is much stronger than the tensile strength of
concrete. Drill holes along the required crack line. These holes are typically
about 2 cm wide and spaced about 10 to 20 cm apart. This pressure destroys the
concrete after a certain period of time, usually between 6 hours and 24 hours.
The cracking time depends on the
ratio of chemicals, added water and ambient temperature. The higher the dose
and temperature, the faster the cracking. The advantage of this method is that
it does not require machines, skilled labor, and no noise or dust. The
disadvantage is the risk of an explosion hole in the first 3 hours, because if
the chemical is explosive, such as CRACK-AG, the chemical reaction.
Other non-explosive substances
such as BETONAMIT CHEMICAL BURSTING will operate without explosion hazard.
In the case of earthquakes such as
the Port of Taimung, Haiti or the Kiambu disaster in Kenya, this method is very
effective, because in both cases, the financial capacity to transport heavy
machinery is not high because of the storage
3. Dismantling
This is done by cutting the
concrete element and then removing it with a shovel or crane. This method is
useful for removing a portion of a building because it does not structurally
affect the remaining structure.
When the concrete members are cut
and then removed with a crane, the complete concrete structure can be removed
with minimal noise, dust and impact on the surrounding structure.
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