3. PROJECT :- C/o 1568DUs /Cat-II(312,2BHK)+ 288(1BHK)
and 968 EWS Multistoried Composite Houses
including internal development and
electrification in pocket 5, sector 14 Dwarka
phase –II.
Agency:- M/s B G Shirke Construction
Technology Private Limited.
Estimate Cost:- Rs 233.83 crores
Tender cost:- Rs 249.12 crores
Time Allowed:- 42 Months
Date of Start:- 18/08/2017
Date of Completion:- 17/02/2021
Specification to followed:- CPWD Specification 2009 with up to
date correction slips issued.
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4. Area of Plot:- 41526 Sqm
Total Plinth Area:- 83023.03 Sqm
Total built-up Area:- 151995 Sqm
Proposed Floor Area
(CAT-II HOUSING):- 51564.06 Sqm
Proposed Floor Area of EWS:- 30140.24 Sqm
Proposed Shops and park Facility- 1318.73 Sqm
1. Shop- 36 NOS
2. Recreational Room- 1 No.
3. Community Room- 1 No.
4. Senior Citizen Room- 1 No.
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6. Precast concrete is a construction product produced by casting
concrete in a reusable mold or "form" which is then cured in a
controlled environment, transported to the construction site and
lifted into place ("tilt up").
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Concrete elements, cast and cured in a manufacturing plant,
then transported to the construction site. • Plant casting allows
increased efficiency and higher quality control. • Durable,
permanent steel forms are reused many times, reducing
formwork costs compared to sitecast concrete. • Use of Type III,
high early strength cement and steam curing allow concrete
members to be cast and cured in as little as 24 hours. •
Controlled casting conditions and high quality forms allow for
greater control of surface finishes.
7. Very rapid speed of erection
Good quality control
Entire building can be precast-walls,
floors,beams,etc.
Rapid construction on site
High quality because of the controlled
conditions in the factory
Prestressing is easily done which can reduce
the size and number of the structural members.
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8. MANUFACTURING UNIT(MU)- It is the place where all the
elements of the buildings are Precasted under a control
environment.(these elements includes-
BEAMS,COLUMNS,SLABS,RETAINING WALLS etc.)
CONSTRUCTION SITE- Place where the flats were under
construction. The elemnts manufactured in MU get transported and
assembled at the construction site as per the drawings.
BATCHING PLANT AND QUALITY ASSUARANCE
LAB- In the batching plant, concrete is produced and the
material is tested in the quality assurance lab to assure that the
material is suitable for use or not.
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10. CASTING OF SLABS- Slabs moulds(frame) are prepared as per the
specification(drawings), reinforcement is placed and then concrete is
poured into the frame and is allowed to attain its compressive strength for
the duration of 28 days.
TRANSPORTATION OF SLABS- Precasted slabs are then loaded on the
conveyor through crane(capacity-15 tonne) and is transported to the site.
10DDA SUMMER
INTERSHIPVID-
20180709-WA0046.mp4
11. PRECASTING AT LOW TEMPERATURE
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It is that time of the year when cold weather plays an immense role
in the procedures, requirements and practices that encompass
precast concrete production. For manufacturers in the warmer
climates, cold-weather concreting is not so much of a concern, but it
is better to be prepared for extreme climatic conditions.
12. SPOT WELDING
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Resistance spot welding
(RSW) is a process in which
contacting metal surface
points are joined by the heat
obtained from resistance to
electric current.
Work-pieces are held together under
pressure exerted by electrodes.
Typically the sheets are in the 0.5 to 3
mm (0.020 to 0.118 in) thickness
range. The process uses two shaped
copper alloy electrodes to concentrate
welding current into a small "spot" and
to simultaneously clamp the sheets
together.
13. A corrosion inhibitor is a chemical
compound that, when added to a liquid or gas,
decreases the corrosion rate of a material,
typically a metal or an alloy. The effectiveness of
a corrosion inhibitor depends on fluid
composition, quantity of water, and flow
regime. A common mechanism for inhibiting
corrosion involves formation of a coating, often
a passivation layer, which prevents access of the
corrosive substance to the metal. Permanent
treatments such as chrome platingare not
generally considered inhibitors, however.
Instead corrosion inhibitors are additives to the
fluids that surround the metal or related object.
Concentration used: 600ml per kg of
cement.
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16. RETAINING WALL
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A retaining wall is a structure designed and constructed to
resist the lateral pressure of soil, when there is a desired
change in ground elevation that exceeds the angle of repose of
the soil.
17. RAFT FOOTING DDA SUMMER INTERSHIPVID_20180626_111925.3gp
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Raft foundations (sometimes known as Mat Foundations) are a
large concrete slab which can support a number of columns and walls.
The slab is spread out under the entire building or at least a large part
of it which lowers the contact pressure compared to the traditionally
used strip or trench footings.
18. P.C.C(PLAINCEMENT CONCRETE)DDA SUMMER
INTERSHIPVID_20180614_120708.3gp
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Plain cement concrete (PCC) is used to provide rigid impervious bed
to RCC in foundation where the earth is soft and yielding. PCC can be used
over brick flat soling or without brick flat soling.
THICKNESS OF P.C.C- 150mm
PLACING AND COMPACTION OF PCC:
Make sure brick soling/sand bed level for PCC is ok.
Make form work for PCC with wooden plank as per specified dimenSions.
Clean dust or foreign or loose earth from concreting area.
Spread polythene over the bed of PCC.
Make level pillars of fresh concrete in the area at suitable intervals but not
more than 2m c/c both ways.
Place the concrete gently (don’t through) from one side. Use the mixed
concrete within 45 minutes after the water is added.
Use wooden rammer for compaction and finishing of PCC.
Make the surface of PCC roughen for joining future work before the
concrete become harden.
19. FOOTING
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The isolated footing is one of the most popular and simplest types of
foundation used worldwide. An isolated footing is used to support a single
column. Isolated footings are independent footings which are provided for
each column. This type of footing is used when. Columns are not closely
spaced.
21. SCREEDING
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A floor screed is usually a cementitious material made from a 1:3 or 1:4.5
ratio of cement to sharp sand. It may be applied onto either a solid in-situ
concrete ground floor slab or onto a precast concrete floor unit. There are
many proprietary screeds on the market and information about these can be
obtained from the manufacturer.
23. PROBLEM:- if the drawing get revised for the new position of
column and the raft get casted, then the column reinforcement coming
out of raft is curtained and isolated foundation is perpared for the
column at the new position above the raft specified by the revised
drawing.
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24. BATCHING PLANT
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A concrete plant, also known as a batch plant or batching plant or a
concrete batching plant, is equipment that combines various ingredients
to form concrete. Some of these inputs include water,
air, admixtures, sand, aggregate (rocks, gravel, etc.), fly ash, silica fume, slag,
and cement.
26. •Describe the quality program and organization to be implemented
so that the project is constructed in accordance with the contract
requirements and industry standards.
•Describe guidelines for inspection and documentation of
construction activities.
•Provide reasonable assurance that the completed work will meet
or exceed the requirements of the construction drawings and
specifications.
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Need For Quality Control And Assurance In
Construction:
•Concern for project managers.
•Even minor defects in constructed facilities can cause heavy loss.
•Quality control during construction consists largely of insuring conformance
to these original design and planning decisions.
31. Learned to read structural and architectural
drawings.
Gained basic knowledge in the field of
construction.
Learned basic work of R.C.C structure at the
site.
Manufacturing of structural precast component
like beams, column, slabs etc.
Learned wise use of available resources.
Learned an importance of proper
communication between office and work site.
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