NEW TECHNOLOGIES CONSTRUCTION Build 30-Story Hotel In Just 15 Days! TOWER 30(T30)
NEW TECHNOLOGIES CONSTRUCTION
Build 30-Story Hotel In Just 15 Days!
TOWER 30(T30)
Present by
J.Thomas Britto(8807423228)
Dept Of Civil Engineering
P.R.Engineering College
ABSTRACT
This thesis embraces the
“Sustainability” concept in the construction industry being the logical outcome
the development of this industry that faces environmental, social and
economical challenges, which enterprises have to consider in the beginning of this
century. This thesis aims at demystifying the “Sustainable Construction”
concept. Due to bad examples in the past, that hopefully will not be repeated
in the present and future, this concept became almost irremediably associated
to construction, in which the prime objective was reducing environmental impact
leaving important parameters, like quality, durability and cost behind. This
concept has lost and continues to loose credibility due to constant marketing
manoeuvres by companies in this sector, that deceivingly associate this concept
to their products, in order to, in a fiercely manner, maximise sales and
profit.The construction industry is one of the most important economical
sectors. Nevertheless, this sector continues to base itself on traditional construction
systems and unqualified workers, being characterised by excessive usage of
natural and energetic resources. This situation causes great environmental
impact with great potentialities to be reduced.This thesis identifies, in
general, the environmental impacts in the construction industry, and
particularly, in the building sector.A few measures and examples of new
construction technologies and others are also presented, that are the result of
technological renewal and improvement of building technologies, some of them,
already applied thousands of years ago.The development and application of these
technologies aim at a construction, more and more sustainable, that settles
evenly on environmental, economical and social domains.A methodology, that is
expected to be adequate to validate the sustainability of construction
solutions, is presented at the end. This methodology is then applied to some
conventional and non-conventional solutions of pavements and exterior walls. It
is hoped that the practices approached, the methodology developed and the
results obtained, may serve as a basis for the various construction
intervenients, in the decision making process, in accomplishing buildings more
sustainable.
Keywords: Building automation; Direct digital control;
Energy management system; prefabrication,T30
INTRODUCTION
Although statistics suggested that
highrise buildings have a lower risk of fire per unit floor area , highrise
buildings account for a very large share of people and property exposed, especially
for the large number of super highrise buildings currently constructing in Asia
and Middle East. The definition of super highrise building changes as
construction technology and human perception advanced. The highrise building
with height more than 23m. This is the maximum elevation resulted from the less
favorable rescue and fire fighting operations with the use of extendable
ladders. Since highrise buildings are unique with regard to their elevated
height from conventional lower buildings, different design considerations
including additional features are required for fire safety. Prescriptive codes
in a number of countries (3, 4) have separate section to cater for highrise
building fire safety design. The additional enhancements in the prescriptive
codes include suppression system, detection and alarm, but do not include the
egress component.
FIRE SAFETY CHALLENGES TO HIGHRISE
BUILDINGS
The fire safety in highrise buildings
has raised special attention by the general public and authorities. The special
report on the operation considerations for highrise firefighting.The special
fire safety issues related to highrise buildings can be summarized into six
major areas: fire department accessibility, egress and people movement, natural
forces, increase in occupant and fire load, combination of occupancies, and
arrangement of internal utility services.Among the above fire safety
challenges, half of them are directly or indirectly related to the evacuation
of building occupants (extended vertical travel distance, high occupant number
and different occupant types). Therefore the challenges of highrise building
evacuation will be discussed in detail.
Building Automation Systems (BAS)
The process of specifying, designing,
and installing building automation systems (BAS) typically begins with the
plans and specifications produced by the mechanical, electrical, and plumbing
(MEP) design engineer. The MEP plans and specifications include equipment and
process schematics that specify the location of sensors and control elements
for the mechanical system. Also included is a narrative “Sequence of
Operations” which describes how the mechanical system is to be controlled.
Despite its name, the “Sequence of Operations” does not describe a sequential
process; it is an overall specification of the control strategy for the
heating, ventilation, and air conditioning (HVAC) system. This information is
provided to the control system integrator, who then creates a configuration
database for the control system, which establishes communication, network, and
device parameters as well as input/output (I/O) configuration parameters. The
control system integrator also develops control application programs for the
controlled equipment based on the narrative “Sequence of Operations.” There is
a great deal of variability in the level of detail provided in the “Sequence of
Operations.”
How does Building Automation work?
HVAC and Lighting Controls – Stand
alone computerized controllers are installed to take over the control of
building HVAC (heating, ventilation, and air conditioning) systems
and lighting. The
building is not only scheduled more closely but it is also operated more
intelligently and efficiently.
Outside Air Optimization
Proper control of outside air
provides necessary inside air changes for occupant comfort and health,
minimizes energy costs by space pre-conditioning, allows for enthalpy-based
free cooling, and reduces the use of outside air when it is not needed.
Coordinating Equipment
Orchestrating the operation of
building systems, so that equipment works together, saves energy and improves
comfort. Individual control systems that are not centrally monitored and
coordinated can fight each other or malfunction, causing comfort problems and
wasting considerable energy. BACnet based BAS can interface to existing or
planned systems so that the building will run smoothly and at peak efficiency
without expensive duplication of controls or unnecessary complexity.
Graphical Operation
Simplifying facility operation and
integrating data from various systems in a "seamless" manner is best
accomplished with a graphical user interface. This eliminates the need to
memorize commands or point numbers, and allows the operator to take a walking
tour of the facility from the console. Existing systems can be easily upgraded
to add this powerful operational tool. Point and click graphics empowers
management by letting everyone see what is going on and taking the mystery out
of proper operations.
Direct Digital Controls (DDC)
Upgrade older existing equipment to
DDC to match new equipment functionality. These controllers come standard on
most new mechanical equipment and are more reliable, require less maintenance,
provide more sophisticated control, and are less expensive to purchase and
operate.
Tighter Scheduling
Conventional controls, such as time
clocks, are inaccurate and are typically setup to run equipment longer than the
actual need. By automating this function with computerized controls, the
computer can predict the optimum time to start/stop equipment and eliminate
waste caused by excessive runtime.
Smarter Control
HVAC equipment is typically sized to
handle the building load under worst-case conditions. Most conventional
controls are set up to meet these design criteria at all times.With the
automation system, control set points and strategies can be adjusted to meet
only the actual load, eliminating unnecessary waste.
Tower 30(30-story
hotel built in just 15 days)
Chinese
workers build 30-story hotel in just 15 days! If we hadn’t seen a of the T30
Hotel going up in China, we might not have believed that anyone, anywhere could
erect a prefabricated 30-story tower in just over 2 weeks. But it’s true –
Broad Sustainable Building (BSB), a subsidiary of the BroadGroup construction
company, has broken their previous record of constructing a 15-story building
in one week with their latest project in Hunan Province. Not only did BSB get
the T30 Hotel up in 15 days or 360 hours (with the help of 200 superspeedy
construction workers),but the company claims that their 17,000 square meter
tower is 5 times more energy efficient than the competition and generates a
fraction of thewaste. It is also said to have the capacity to withstand an
earthquake that measures up to 9 on the Richter Magnitude Scale! Take a look at
the incredible time-lapse video of the hotel’s construction after the jump.
Prefabricated building constructions are often advocated for, because they
greatly reduce energy and material waste, and BSB claims that
the
China Academy of Building Research certified their new T30 Hotel to be
perfectly safe, but one has to wonder what China will look like in 20 years if
contractors throw up a new 17,000 square foot tower every 2 weeks... While an
impressive engineering feat that boasts enormous eco-credentials such as
external solar shading, superb energy efficiency, a heat recovery system, and a
state of the art air purification system makes the air quality inside the hotel
20 times better than it is outside, we aren’t 100% convinced that this kind of
scaled prefabricated construction is the most appropriate answer to the
challenges posed by climate change, pollution, or population growth.
BroadGroup’s Zhang Zue disagrees. He told WAN that China needs to “speed up
[their]environmental thinking.” He added that “We need buildings like this all
over China.” We’d love to hear from our readers.Do you think that the T30
Hotelis setting a good precedent in China?
This
demonstrates the Chinese company Broad Sustainable Building did not exaggerate
about its construction speed. Time-lapse segment starts from 1:19. (Courtesy
Broad Group) Chinese construction workershave once again awed the world,this
time by erecting a 30-story hotel in 360 hours in HunanProvince. The building
is the latest achievement of Broad Sustainable Building (BSB), a Chinese
construction company renowned for its eye-openingefficiency. A five-star hotel
to be Ground was broken on the hotel on December 2, 2011, in the Lin Gang
Industrial Zone in Xiangyin County near the provincialcapital Changsha. The
building was completed in 15 days. Named T30, the 17,000-square- meter hotel is
due to open on January 18, and is expected tobe a five-star establishment. The
hotel will feature 316 standard rooms, 32 suites, eight ambassador suites and
two presidential suites. Other facilities include a restaurant, bar, gym and
swimming pool on the top floor, underground parking space for 73 vehicles and
even a helicopter pad. The entire hotel costs a total of US$17 million to
build. The building's owner, BSB, is asubsidiary of Chinese technology
enterprise Broad Group, whose portfolio includes assembling its own pavilion
(the six-story Broad Pavilion) for the 2010 Shanghai Expo within 24 hours, and
erecting a 15-story building in six days in June 2010. The key to achieving
such stunning speed is an innovative construction technique developed by Broad.
Ninety-
three percent of the tower was pieced together with pre-made components,
explained Broad Group's senior vice president Juliet Jiang. Jiang said that the
company might be able to construct similar buildings in 200 hours once workers
become more skilful. Jiang also said that the reason for the emphasis on speedy
construction was "to avoid rain." Reaction to doubts Jiang said BSB
is unconcerned about doubts regarding the quality of buildings erected within
such short time frames. "It's because people don't understand [the
technologies used for the building]," she said. "Let time prove
everything." According to a press release by China Academy of Building
Research (CABR), T30 was constructed with a newstructural system designed and
developed by BSB. A simulation model of the building withstood a series of earthquake
resistance tests -- from 7.0 to 9.0 in magnitude -- conducted by CABR last May.
It
is alsosaid to have the capacity to withstand an earthquake that measures up to
9 on the Richter Magnitude Scale! Take a look at the incredible time-lapse
video of the hotel’s construction after the jump. We typically advocate
prefabricated building construction because it greatly reduces energy and
material waste, and BSB claims that the China Academy of Building Research
certified their new
square
foot tower every 2 weeks. While an impressive engineering feat that boasts
enormous eco- credentials such as externalsolar shading, superb
energyefficiency, a heat recovery system, and a state of the art air
purification system makes theair quality inside the hotel 20 times better than
it is outside, we aren’t 100% convinced thatthis kind of scaled prefabricated construction
is the most appropriate answer to the challenges posed by climate change,
pollution, or population growth.
BroadGroup’s
Zhang Zue disagrees. He told WAN that China needs to “speed up [their]
environmental thinking.” He added that “We need buildings like this all over
China.” We’d love to hear from our readers.Do you think that the T30 Hotel is
setting a good precedent in China?
Prefabrication
Prefabrication is the practice of
assembling components of a structure in a factory or other manufacturing site,
and transporting complete assemblies or sub-assemblies to the construction site
where the structure is to be located. The term is used to distinguish this
process from the more conventional construction practice of transporting the
basic materials to the construction site where allassembly is carried out. The
term prefabrication also applies to the manufacturing of things other than
structures at a fixed site. It is frequently used when fabrication of a section
of a machine or any movable structure is shifted from the main manufacturing
site to another location, and the sectionis supplied assembled and readyto fit.
It is not generally used to refer to electrical or electronic components of a
machine, or mechanical parts such as pumps, gearboxes and compressors which are
usually supplied as separate items, but to sections of the body of the machine
which in the past were fabricated with the whole machine. Prefabricated parts
of the body of the machine may be called 'sub-assemblies' to distinguish them
from the other components. The process and theory of prefabrication An example
from house-building illustrates the process of prefabrication.
The conventional method of building a
house is to transport bricks, timber, cement, sand, steel and construction
aggregate, etc. to the site, and to construct the house on site from these
materials. In prefabricated construction, only the foundations are constructed
in this way, while sections of walls, floors and roof are prefabricated
(assembled) in a factory (possibly with window and door frames included),
transported to the site, lifted into place by a crane and bolted together.
Prefabrication is used in the manufacture of ships, aircraft and all kinds of
vehicles and machines where sections previously assembled at the final point of
manufacture areassembled elsewhere instead, before being delivered for final
assembly. The theory behind the method is that time and cost is saved if
similar construction tasks can be grouped, and assembly line techniques can be
employed in prefabrication at a location where skilled labour is available,
while congestion at the assembly site, which wastes time, can be reduced. The
method finds application particularly where the structure is composed of
repeating units or forms, or where multiple copies of the same basic structure
are being constructed. Prefabrication avoids the need to transport so many
skilled workers to the construction site, and other restricting conditions such
as a lack of power, lack of water, exposure to harsh weather or a hazardous
environment are avoided. Against these advantages must be weighed the cost of
transporting prefabricated sections and lifting them into position as they will
usually be larger, more fragile and more difficult to handle than the materials
and components of which they are made.
Prefabricated steel and glass
sections are widely used for the exterior of large buildings. Prefabrication
saves engineering time on the construction site in civil engineering projects.
This can be vital to the success of projects such as bridges and avalanche
galleries, where weather conditions may only allow brief periods of
construction. Prefabricated bridge elements and systems offer bridge designers
and contractors significant advantages in terms of construction time, safety,
environmental impact, constructibility, and cost. Prefabrication can also help
minimize the impact on traffic from bridge building. Additionally, small,
commonly-used structures such as concrete pylons are in most cases prefabricated.
Prefabrication has become widely used in the assembly of aircraft and
spacecraft, with components such as wings and fuselagesections often being
manufactured in different
countries or states
from the final assembly site. However this is sometimes for political rather
than commercial reasons - e.g. Airbus
Advantages of prefabrication
1. Self-supporting ready-made
components are used, so the need for formwork, shuttering and scaffolding is
greatly reduced.
2.Construction time is reduced and
buildings are completed sooner, allowing an earlier return of the capital
invested.
3.On-site construction and congestion
is minimized.
4. Quality control can be easier in a
factory assembly line setting than a construction site setting.
5. Prefabrication can be located
where skilled labour is more readily available and costs of labour, power,
materials, space and overheads are lower.
6. Time spent in bad weather or
hazardous environments at the construction site is minimized.
7. Less waste may occur
8. Advanced materials such as
sandwich-structured composite can be easily used, improving thermal and sound
insulation and airtightness
Disadvantages:
1. Careful handling of prefabricated
components such as concrete panels or steel and glass panels is required.
2. Attention has to be paid to the
strength and corrosion- resistance of the joining of prefabricated sections to
avoid failure of the joint.
3. Similarly, leaks can form at
joints in prefabricated components.
4. Transportation costs may be higher
for voluminous prefabricated sections than for the materials of which they are
made, which can often be packed more efficiently.
5. Large prefabricated sections
require heavy-duty cranes and precision measurement and handling to place in
position.
6. Larger groups of buildings from
the same type of prefabricated elements tend to look drab and monotonous.
7. Local jobs are lost
Prefabricated Building material
Prefabricated building materials are
used for buildings that are manufactured off site and shipped later to assemble
at the final location. Some of the commonly used prefabricated
building materials are
aluminum, steel, wood, fiberglass and concrete. Prefabricated metal buildings
use galvanized steel and galvalume as the chief materials for building.
Galvalume is a form of steel coated with aluminum-zinc.This is to protect the
building against corrosion, rust and fire. It also provides a sturdy and
protective covering to the prefabricated building. Almost all the components of
a metal building such as beams, frames, columns, walls and roofs, are made of
steel. Most prefabricated military buildings use steel or aluminum frames.
Synthetic materials are used for the walls and roofs. To provide enhanced
security, a combination of both metal and cloth materials are used. Plastic
flooring materials can be quickly assembled and are very durable. Prefabricated
building materials used for small prefabricated buildings are steel, wood,
fiberglass, plastic or aluminum materials. These materials are cheaper than
regular brick and concrete buildings. Materials like steel, fiberglass, wood
and aluminum are used as prefabricated building materials for sports buildings.
These materials provide flexibility
and are preferred for making structures and accessories like stands and seats
for stadium and gyms. For making low cost houses, prefabricated materials
likestraw bale, Ferro cement,Calcium silicate products,composites and other
cheap wood based materials are currently being used. Calcium silicate bricks
are strong and durable. Ferro cement consists of a cement matrix reinforced
witha mesh of closely-spaced iron rods or wires. In this type of construction,
the techniques used are simple and quick. Using prefabricated materials one can
make durable, water and fire resistant and cheap prefabricated buildings. Most
of the prefabricated building materials are eco-friendly and affordable.
Prefabricated Buildings provides detailed information on prefabricated
building,prefabricated metal buildings, small prefabricated buildings,
prefabricated building manufacturers and more. Prefabricated Buildings is
affiliated with Manufactured home floor plans
What Are Prefabricated Building
Materials
These are construction materials
specifically designed to be manufactured offsite but later brought on to the
real site.They are made up of factory built components which are assembled away
from the main location. The most considered types are the Galvavolume and the
Galvanized steel. Steel coated with aluminum zinc are the most commonly
preferred prefabricated building materials. They prevent corrosion, fire and
rust from destroying the building. This greatly reduces the construction cost.
Fabricated building materials are commonly used in the military buildings to
improve on the security. The builders normally combine both cloth and metal
materials when flooring. These materials are very durable and can easily be
assembled. The ceiling is commonly made up of frames, beams, walls and roofs of
steel. Most commonly used fabricated materials are fiber glass, concrete, steel
and aluminum. They are given consideration because of the hardness..
Prefabricated construction
is a building process in which
elements or modules of the structure are prefabricated at plants, then
transported to the construction site for installation. Using this method can
reduce the time of building, also saving construction cost. Prefabricated
construction is now widely
applied for new houses
or other building structures like bridge, tunnels, culverts, water supply
system… The benefits of prefabricated construction method is from the
fabrication of standard components on factory floor. This production is less
time consumption compared to actual condition of construction process. The prefabricated
elements are transported to the site for installing process. At the site, the
modules are unloaded, moved into position with the support of heavy cranes, and
assembled to form a designed building.
Together with the fast
assembly,prefabricated construction also saves a lot of money on the
construction project. By using standard patterns, the building materials are
saved at the manufacturing factories. This help to reduce the waste in formwork
and other materials that can occur during traditional building procedures.
Another considerable profit using prefabricated construction method is the
energy efficiency. Because the prefab elements of a panelized home are precut,
they fit snugly together, making for a tighter edifice. This means less effort for
heating and cooling, resulted in lower energy bills.
The rapid development of
prefabricated houses has led to the increasing of construction templates that
homeowners have more choice for designs of their houses. By combining these
templates, it is possible to design the layout of the house, specify the
dimensions of each room, and build a home that is exactly to the specification
of the owners.
There are also complex building plans
for prefabricated construction that can be adjusted slightly and still have the
benefit of using materials of standard lengths, widths, and textures.
Prefabricated houses are not the only type of construction structures that can
be produced using prefabrication construction method. As mentioned above, this
method is widely used in many types of constructions like bridges, culverts or
even swimming pools.
Prefab Housing Cost:
Buyers can typically expect to pay
less for a prefab home than they would for stick-built construction. Modular
homes do offer pricey customization, but the material costs still decrease with
assembly-line construction. Because prefab home parts like windows and walls
are made uniformly, there is no need for skilled workers to manufacture parts
individually, which drives down costs. Also, factories, unlike most individual
tradesmen, can buy the supplies in bulk. Prefabricated houses are constructed
indoors and away from the weather, which also reduces delays and subsequent
costs.
Prefabricated houses, like
stick-built homes, do not have fixed prices, so buyers can negotiate. In
general, they can expect to pay 10 to 25 percent less for prefabricated houses
over stick-built construction. Typically, land is the biggest cash outlay for a
prefabricated house. And, depending on your skill level, construction could be
the other big expense. People who ordered Sears, Roebuck and Co. homes in the
1900s usually possessed carpentry skills, but mostmodern homeowners wouldn't
feel comfortable laying their own foundation.
There are other regulations for
building, including zoning restrictions, survey requirements and electrical and
water hookups. Some companies offer their own services – for an extra fee, of
course. Once buyers have the land and the house they want, financing can be a
hurdle. Manufactured homes aren't considered real estate until they are
permanently installed, so it can be more difficult to get financing for them.
Even then, manufactured homes can depreciate in value, so lenders are less
likely to give out loans. Modular homes, however, do
not suffer as much from
this lower- quality stigma, so financing for them is more similar to that for
stick-built houses.
Synergistic Effect
When hot dip galvanized steel is
painted, the duplex system provides a more sophisticated manner of corrosion
protection. The galvanized coating protects the base steel, supplying cathodic
and barrier protection. Paint, in turn, grants barrier protection to the
galvanized coating. The paint slows down the rate at which the zinc is
consumed, greatly extending the life of the galvanized steel. In return, once
the paint has been weathered down or damaged, the zinc is still available to
provide cathodic and barrier protection. When painted steel corrodes,
voluminous rust grows under the paint and eventually causes the paint to peel.
However, if the steel is galvanized, the corrosion is minimal and the paint
will not peel, thereby greatly increasing the life of the structure and
minimizing paint peeling. As one of the most frequent reasons for paint failure
is discontinuity in the coating, a galvanized coating will eliminate early
rusting at pinholes. In turn, the life of the product is greatly increased
CONCLUSION
An emergency lift evacuation strategy
has been proposed and discussed which can be put into practical use without
significant violation to existing stair evacuation strategy and additional
investment in evacuation safety provisions. The shuttle lifts have been used in
the proposed strategy which can eliminate the dedicated lift shaft
pressurization and water spillage protection since there is no shaft opening on
typical floors. Using refuge floors as lift evacuation pick up and occupant
staging floors can protect the occupants from fire and smoke hazards since
refuge floors are designed to be a temporary place of safety for occupant’s
refuge.
A computational simulation using a
proposed super highrise building as an example has been carried out to
demonstrate the effectiveness of the proposed lift evacuation strategy. It has
been shown that the proposed strategy of lift evacuation has advantages over
stair evacuation in terms of total building evacuation time and percentage of
occupants discharged.
Sensitivity analyses have also been
carried out based on different occupant number and the use of lower deck or
both decks of shuttle lifts for evacuation to investigate the changes in
effectiveness of lift evacuation. It has been found that the evacuation time is
dependent on a number of variables such as building height, staircase width,
occupant distribution and number which the proposed lift evacuation strategy
should be tailor made using performance based fire engineering design for
individual building.
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