design of multistorey buildings (overview)

7/23/2019 Design of Multistorey Buildings (Overview)

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CONSTRUCTION AND DESIGN OF

MULTISTOREY BUILDING

AT

UNITECH LTD

SUBMITTED BY: UNDER THE GUINDANCE OFABHIMANYU PARIDA RAJIV GUPTA

!"!#" FACU$TY COORDINATOR


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Pro%&'(s Un)&r(ak&n

1. Construction of resiential builing !escape"1.1 #$cavation% &ayout an 'ounation

1.( Column layout% shuttering an casting

1.) Slab% *eam shuttering an casting

1.+ Important Components

(. Introuction to bone slab post tensioning(.1 ,ost tensioning

(.( benefits

(.) Tenons an stressing


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Pro%&'(s Un)&r(ak&n

). -esign of builing component

).1 'ormwork esign

).( Staircase esign).) -eep *eams

).+ Slabs


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E*'a+a(ion, $a-o.( an) Fo.n)a(ion

#$cavation is a process of making trenches by igging up

of earth for the construction of founations an

basements.

#$cavation level at escape site is (1./(0 mm

#$cavation is one by the C* on the hourly basis

2fter the e$cavation the surface is levele calle surface

ressing

&ayout is one on the ,CC poure over levele surface.

Column an founation !raft " steel is then lai as perrawings.


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Poin(s (o (ak& 'ar&:/

layout shoul be checke properly.

Check any ifference between architectural an structural

rawings regaring location of column.

2fter e$cavation check the stability of temporary structures built

near the e$cavate groun. *efore laying raft reinforcement% shuttering wall which is mainly

brick wall shoul be built an shoul be fille with soil on other

sie.

Check the irection of chair bars in the raft


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E0CAVATION


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$AYOUT


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RAFT FOUNDATION


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COU$MN CASTING

3n the raft the column layout is one.

&ayout for starter.

The column ties an link bars are provie as per column

reinforcement rawings an general specifications.

-isplacement of main bars shoul be provie with & bar The plumb of formwork shoul be checke.

4eight of cast shoul be calculate accurately.

2voi caps as far as possible.


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$AYOUT , PEDESTA$ 1 STARTER


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$IN2S 1 TIES


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P$UMB 1 FORM3OR2, CASTING,CURING


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S$AB, BEAM SHUTTERING 1 CASTING

beam bottom is first lai on the column an then slab formwork

is lai

2fter the reinforcement% the slab is checke for steel as per

rawings an level re5uire.

2 camber of 0 mm in provie in the center of slab.

Casting of slab shoul be iscontinue at l6) from the support.


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S$AB STAGES


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IMPORTANT COMPONENTS

Key in column

Water bar

*ining materials

#$pansion 7oint


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2EY IN CO$UMN

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

mae at the 7unction so that the proper bonbetween the ol concrete an new concrete is

forme.


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2EY IN CO$UMN


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E0PANSION JOINT

Since concrete is sub7ecte to volume change. ,rovision must

be mae to cater for the volume change by way of 7oint to

relieve the stresses prouce.

#$pansion 7oint is function of length

*uilings longer than +0 m are generally provie with one ormore e$pansion 7oints.

Material use as e$pansion 7oint material is armour boar

whose thickness is (0 mm.


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E0PANSION JOINT

#$pansion 7oint

material% si8e is (0 mm

#$pansion 7oint inbuiling


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3ATER BAR

Water bar is provie in the retaining wall o

that the moisture can9t move from the soil to

the 7oint. Water bar is basically provie at

the constructions 7oints of retaining wall of twoifferent towers


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3ATER BAR


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BINDING MATERIA$S

Since the thermal e$pansion of concrete is ifferent from that ofmasonry. The interface between the concrete an the masonry isliable to crack. To avoi this crack the chicken wire mesh is use toavoi the crack an also provies the better grip for Masonry withconcrete.

Similarly when the rainage pipes are lai along with the outer wallthen again the connection between the pipe an the wall hasifferent coefficient of temperature change hence they are 7oint tothe concrete by lea keys.

In the toilets an kitchen sunken portion the 7oints in any case are

packe by water proof an non shrinkable material.


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BINDING MATERIA$S

Chicken wire mesh between

brick masonry an concrete

Connection of pipes withconcrete

Chicken wire mesh in

conuits through concrete


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3ATER PROOFING

Water proofing has remaine as an unsolve comple$ problem

:se of plastici8ers% super plastici8ers% air;entraining agents

helps in reucing the permeability of concrete by reucing the

re5uirement of mi$ing water% hence can be also be regare aswaterproof material.

Some of approve water;proofing compoun by the company

are


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3ATER PROOFING

Water proofing in sunken

portion of kitchen an

bathroom W, in sunken portion at

groun level

W, in retaining wall


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3ATER PROOFING IN GARDEN AREA

'or water proofing in garen area the soil is first levele an

then ramme to achieve the ma$imum ensity

The ,CC is then lai own mi$e with tape Crete !a water

proofing compoun"

2fter ,CC the plaster of fibrous material is one. the bituminous sheets are lai by heating it with the weler. 3n

those sheets the rainage pipes are lai own with suitable

slope an these pipes are covere with geo;fabric sheets.

2gain the plaster is one. 3n the plaster the += mm aggregates

are lai. 3n the aggregate the geo;fabric sheets are lai own on which

the san is place > on the san the soil %along with fertili8ers%

is place on which the garening is one for the non tower area.


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3ATER PROOFING IN GARDEN AREA

Sany soil

,CC mi$e with tape

Crete !water proof

compoun"

Te$as !bitumen" sheet

-rainage pipe

+= mm aggregate

?eo;fabric sheet San


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INTRODUCTION4BENEFITS

,ost;tensioning is a metho of reinforcing !strengthening"

concrete or other materials with high;strength steel strans or

bars% typically referre to as tenons

allows longer clear spans% thinner slabs

lower overall builing height for the same floor;to;floor height.

allows a high egree of fle$ibility in the column layout% span

lengths an ramp configurations


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POST TENSIONING


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P$ACEMENT OF TENDONS

,ositioning an fi$ing of casting an block;outs to the ege formworkor construction 7oint formwork

The support bars shall be prepare in avance. &ay tenons accoring to tenon layout in accorance with the

rawings. 'i$ tenons to correct profiles with support bars an chairs an the

tenons are mae with provisions for grouting using grout using groutvents an grout hoses

,repare installation report for every installation as per the encloseformat.

tolerance of tenon profiles is recommene as follows

design of multistorey buildings (overview)

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