View
226
Download
0
Category
Preview:
Citation preview
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
1/39
Thanks For Choosing
www.engineeringcivil.com
We hope that this presentation is useful to you. If you
also have any presentation which can be useful toother civil engineers then please contact us via our
website.
Thanks
KJS
http://www.engineeringcivil.com/http://www.engineeringcivil.com/7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
2/39
CONSTRUCTION AND DESIGN OF
MULTISTOREY BUILDING
AT
UNITECH LTD
SUBMITTED BY: UNDER THE GUINDANCE OF
ABHIMANYU PARIDA RAJIV GUPTA
1040241 FACULTY COORDINATOR
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
3/39
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
4/39
Projects Undertaken
1. Construction of residential building (escape)1.1 Excavation, Layout and Foundation
1.2 Column layout, shuttering and casting
1.3 Slab, Beam shuttering and casting
1.4 Important Components
2. Introduction to bonded slab post tensioning2.1 Post tensioning
2.2 benefits
2.3 Tendons and stressing
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
5/39
Projects Undertaken
3. Design of building component
3.1 Formwork design
3.2 Staircase design3.3 Deep Beams
3.4 Slabs
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
6/39
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
7/39
Excavation, Layout and Foundation
Excavation is a process of making trenches by digging up
of earth for the construction of foundations and
basements.
Excavation level at escape site is 219.825 mm
Excavation is done by the JCB on the hourly basis
After the excavation the surface is leveled called surface
dressing
Layout is done on the PCC poured over leveled surface.
Column and foundation (raft ) steel is then laid as perdrawings.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
8/39
Points to take care:-
layout should be checked properly.
Check any difference between architectural and structural
drawings regarding location of column.
After excavation check the stability of temporary structures built
near the excavated ground. Before laying raft reinforcement, shuttering wall which is mainly
brick wall should be built and should be filled with soil on other
side.
Check the direction of chair bars in the raft
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
9/39
EXCAVATION
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
10/39
LAYOUT
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
11/39
RAFT FOUNDATION
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
12/39
COULMN CASTING
On the raft the column layout is done.
Layout for starter.
The column ties and link bars are provided as per column
reinforcement drawings and general specifications.
Displacement of main bars should be provided with L bar The plumb of formwork should be checked.
Height of cast should be calculated accurately.
Avoid caps as far as possible.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
13/39
LAYOUT , PEDESTAL & STARTER
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
14/39
LINKS & TIES
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
15/39
PLUMB & FORMWORK, CASTING,CURING
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
16/39
SLAB, BEAM SHUTTERING & CASTING
beam bottom is first laid on the column and then slab formwork
is laid
After the reinforcement, the slab is checked for steel as per
drawings and level required.
A camber of 5 mm in provided in the center of slab.
Casting of slab should be discontinue at l/3 from the support.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
17/39
SLAB STAGES
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
18/39
IMPORTANT COMPONENTS
Key in column
Water bar
Binding materials
Expansion joint
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
19/39
KEY IN COLUMN
since the height of column is very large,
hence it is not possible to cast the column at
one time, to cast the column later the key is
made at the junction so that the proper bondbetween the old concrete and new concrete
is formed.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
20/39
KEY IN COLUMN
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
21/39
EXPANSION JOINT
Since concrete is subjected to volume change. Provision must
be made to cater for the volume change by way of joint to
relieve the stresses produced.
Expansion joint is function of length
Buildings longer than 45 m are generally provided with one ormore expansion joints.
Material used as expansion joint material is armour board
whose thickness is 25 mm.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
22/39
EXPANSION JOINT
Expansion joint
material, size is 25 mm
Expansion joint inbuilding
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
23/39
WATER BAR
Water bar is provided in the retaining wall o
that the moisture cant move from the soil to
the joint. Water bar is basically provided at
the constructions joints of retaining wall of twodifferent towers
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
24/39
WATER BAR
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
25/39
BINDING MATERIALS
Since the thermal expansion of concrete is different from that ofmasonry. The interface between the concrete and the masonry isliable to crack. To avoid this crack the chicken wire mesh is used toavoid the crack and also provides the better grip for Masonry withconcrete.
Similarly when the drainage pipes are laid along with the outer wallthen again the connection between the pipe and the wall hasdifferent coefficient of temperature change hence they are joint tothe concrete by lead keys.
In the toilets and kitchen sunken portion the joints in any case are
packed by water proof and non shrinkable material.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
26/39
BINDING MATERIALS
Chicken wire mesh between
brick masonry and concrete
Connection of pipes withconcrete
Chicken wire mesh in
conduits through concrete
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
27/39
WATER PROOFING
Water proofing has remained as an unsolved complex problem
Use of plasticizers, super plasticizers, air-entraining agents
helps in reducing the permeability of concrete by reducing the
requirement of mixing water, hence can be also be regarded aswaterproof material.
Some of approved water-proofing compound by the company
are:- pidilite, cico, fosroe, baushimine, unitile.
Water-proofing cement paint:- super snoweem
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
28/39
WATER PROOFING
Water proofing in sunken
portion of kitchen and
bathroom WP in sunken portion at
ground level
WP in retaining wall
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
29/39
WATER PROOFING IN GARDEN AREA
For water proofing in garden area the soil is first leveled and
then rammed to achieve the maximum density
The PCC is then laid down mixed with tape Crete (a water
proofing compound)
After PCC the plaster of fibrous material is done. the bituminous sheets are laid by heating it with the welder. On
those sheets the drainage pipes are laid down with suitable
slope and these pipes are covered with geo-fabric sheets.
Again the plaster is done. On the plaster the 40 mm aggregates
are laid. On the aggregate the geo-fabric sheets are laid down on which
the sand is placed & on the sand the soil ,along with fertilizers,
is placed on which the gardening is done for the non tower area.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
30/39
WATER PROOFING IN GARDEN AREA
Sandy soil
PCC mixed with tape
Crete (water proof
compound)
Texas (bitumen) sheet
Drainage pipe
40 mm aggregate
Geo-fabric sheet
Sand
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
31/39
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
32/39
INTRODUCTION/BENEFITS
Post-tensioning is a method of reinforcing (strengthening)
concrete or other materials with high-strength steel strands or
bars, typically referred to as tendons
allows longer clear spans, thinner slabs
lower overall building height for the same floor-to-floor height.
allows a high degree of flexibility in the column layout, span
lengths and ramp configurations
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
33/39
POST TENSIONING
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
34/39
PLACEMENT OF TENDONS
Positioning and fixing of casting and block-outs to the edge formworkor construction joint formwork
The support bars shall be prepared in advance.
Lay tendons according to tendon layout in accordance with thedrawings.
Fix tendons to correct profiles with support bars and chairs and the
tendons are made with provisions for grouting using grout using groutvents and grout hoses
Prepare installation report for every installation as per the enclosedformat.
tolerance of tendon profiles is recommended as follows:
**vertical: + 5 mm (at lowest and highest points)
Horizontal: + 100 mm
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
35/39
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
36/39
LOADS ON FALSEWORK
Loads on Falsework are any combinations of
the following:
Dead loads,
Imposed loads, Environmental loads,
Incidental loads during erection and
operation, and Lateral pressure.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
37/39
DIFFERENT LOAD DATA
Self load shall be determined by either actual measurement or inaccordance with IS 875 (Part I) the unit weight of wet concreteincluding reinforcement shall be taken as 26 kN/m. However, inabsence of the data, load may be assumed as 500 N/M2 for thepurpose of initial calculations .
Loads during constructional operation shall constitute the imposedloads [see IS 875 (Part 2 ) Where allowance has only to be made foraccess and inspection purposes, a loading of 750 N/m should beadequate
The lateral pressure due to fresh concrete depends on the temperatureof concrete as placed, the rate of placing of concrete and the concretemix proportion
Wind loads should be taken for design in accordance with IS 875 (Part3 ) subject to a minimum horizontal load equal to 3 percent of thevertical loads at critical level.
Snow loads should be assumed in accordance with IS 875(4) . Themaximum density of ice may be assumed to be 900 kg/m.
7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
38/39
OUTPUT OF EXCEL SHEET(DOFW)
http://localhost/var/www/apps/conversion/releases/formwork%20design/MAXIMUM%20PRESSURE%20FOR%20FORMWORK.xlshttp://localhost/var/www/apps/conversion/releases/formwork%20design/MAXIMUM%20PRESSURE%20FOR%20FORMWORK.xls7/31/2019 Cep-construction and Design of Multistorey Building by Abhimanyu Parida
39/39
End Note
This presentation is for educational use can
use this as part of reference material and it
should not be used directly as your own
presentation.
For more such presentation log on to
www.engineeringcivil.com
http://www.engineeringcivil.com/http://www.engineeringcivil.com/Recommended