bk-hh-qac-ms-0017 - foundation of central control room & switch gear building

8/17/2019 BK-HH-QAC-MS-0017 - Foundation of Central Control Room & Switch Gear Building

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METHOD STATEMENTCentral Control Room & Switchgear Building

(Foundation)

118 M! COMB"NED C#C$E %O!ER %$ANT Bhi'hi

Rev. : 00

Date: 26.02.16

Method Statement118 M! CC%% Bhi'hi

Central Control Room & Switchgear Building

Rev Date Description

Signed

By Status Remarks

R0 26.02.16

Foundation of

Centra Contro

Room ! S"itc#gear

Buiding

For

$pprova

%re(ared )*+Engineer

Ma, -Retd. Shahid Anwar

Chec'ed )*+

A((ro/ed )*+

Construction of Centra Contro Room ! S"itc#gear Buiding

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'Foundation(118 M! COMB"NED C#C$E %O!ER %$ANT Bhi'hi

Rev. : 00

Date: 26.02.16

Ta)le o0 Content

12 Sco(e 3 Decri(tion o0 !or'

42 Attachment

52 Material

62 E7ui(ment 3 Tool

2 %re9Start Chec'

:2 Se7uence o0 !or'

;2 Concrete %roduction & %lacement+

82 Contingenc* %lan

o) Ri' Anal*i


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Rev. : 00

Date: 26.02.16

12 Sco(e 3 Decri(tion O0 !or'

)#is met#od statement covers typica procedure for construction of Centra Contro Room !

S"itc#gear Buiding Foundation.

42 Attachment+

1. Dra"ings of Centra Contro Room ! S"itc#gear Buiding Foundation

52 Material+Sr2 Decri(tion Standard

1 *ooden py

4 Scaffoding %ipes

5 Cement

6 Stee

Concrete $dmi+ture.

62 E7ui(ment 3 Tool+

Sr ? Decri(tion No2 o0 "tem Remar'

1 Concrete Batc#ing pant 02 1 Stand ,y

5 -o,ie Concrete %ump 01 1 Stand ,y

6 )ransit -i+er 0 2 stand ,y

Concrete /i,rator 06 02 Stand ,y

: Dump )rucks 0

; Food ig#ts 0


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Rev. : 00

Date: 26.02.16

2 %re9Start Chec'

)#e pre3start c#ecks must cover t#e foo"ing areas:

• $vaia,iity of pant and e4uipment to ,e used

• 5round conditions.

• %ro+imity #aards and "efare faciities.

• 7nsure t#e construction area #as ,een c#ecked for over#ead and underground

services prior to t#e commencement of "ork.

:2 Se7uence o0 !or'

i. -anua dressing and eveing 8 trimming "i ,e done at t#e ,ottom of t#e e+cavation.

ii. Binding concrete ')#ickness 9 100 mm( "i ,e paced in one pour prior to commencing

foundation "ork.

iii. Stee re,ar of pie cap and ,eams connecting t#e pie caps "i ,e fi+ed "it# appropriate

overapping as per approved dra"ing. Surveyor "i inspect t#e re4uired eevation of t#e

stee assem,y. nspection re4uest for stee re,ar s#a ,e raised.

iv. *ooden form"ork s#a ,e erected for pie caps. C#eck re4uest for form"ork s#a ,e

raised.

v. Site 7ngineer "i ensure t#at t#e a t#e em,edded parts 'as per dra"ings( are in pace

,efore commencing t#e concreting.

vi. Rectification "i ,e carried out as per re4uirement.

vii. Concrete of desired specifications s#a ,e produced at t"o Batc#ing pants and

transported to t#e site in constanty rotating drums of )ransit mi+ers; as per 4uaity !

testing procedures.

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Rev. : 00

Date: 26.02.16

+. Concrete vi,rators s#a ,e used and t#e vi,rating process at one point s#oud not

proong ,eyond 0?60 seconds in order to avoid ,eeding of concrete. )o ensure concrete

of #omogeneous consistency; proper attention "i ,e paid. Concrete sumps for "a

section s#a ,e 1=03200 mm. Coapse sumps s#a ,e avoided.

+i. Stee fi+ing of piers "i commence rig#t after t#e form"ork of pie cap is removed after 2>

#ours.

+ii. Form"ork fi+ing for piers "i take pace.

+iii. Concrete %ouring for piers "i take pace. Site engineer "i ensure t#at t#e stee

assem,y is propery paced at re4uired eve.

+iv. )op concrete surface of t#e piers "i ,e rendered roug#.

+v. )#e ,ackfiing "i take pace.


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Rev. : 00

Date: 26.02.16

;2 Concrete %roduction & %lacement+

1. Concrete of desired specification s#a ,e produced at ,atc#ing pant under strict 4uaity

contro. Consistency s#a ,e maintained ,y performing sump tests at reguar intervas at

t#e pouring site; and recorded in dockets. For ring ,eam sump s#a vary ,et"een 16

to 4mm. Specimens s#a ,e taken for compressive strengt# determination as per $C

Code @ 1 set '6 cu,es( for 100 mA or ess. $dditiona sampes s#a ,e taken if so

desired ,y t#e consutants.

2. Concrete s#a ,e transported to t#e pouring site ,y means of transit mi+ers and s#a ,e

poured "it# mo,ie pumps. . *#ie pouring; care s#a ,e taken "it# respect to setting of concrete. $ activities from

production to pouring; compaction and surface finis#ing s#a ,e so timed t#at t#e risk of

cod oint is eiminated.

=. Surface s#a ,e "ooden tro"eed up to initia setting time; t#en ,y using stee tro"e.

6. $fter fina setting t#e finis#ed surface "i ,e cured "it# "ater and ater putting socked

ute cot#. )#e curing process s#a ast for a minimum period of & days.

Note+During t#e concrete pacement process; dimensions; verticaity; diagona etc. ! t#e eve of

pouring s#a ,e cosey monitored. $ny defects in t#e dimensions s#a immediatey ,e

rectified. n case of maor faiure ike sippage of form"ork at any point '"#ic# occurs in rare

cases(; pouring operation s#a ,e paused; form"ork s#a ,e rectified; e+tra concrete s#a

,e ceaned a"ay. )#e "#oe process s#a immediatey ,e performed to avoid any deay.

82 Contingenc* %lan

i2 Climate+

-7) officia "e, site s#a ,e c#ecked for t#e "eat#er forecast. o concreting s#a ,ecarried out during incement "eat#er 'i.e. #ig# temperatures; #eavy rains etc(.

ii2 %roduction+

a2 Material+

Sufficient stock of a materias s#a ,e ensured.

,. Batching %lant+

)"o Batc#ing pants are ready; out of "#ic# one s#a ,e operationa "#ereas

t#e ot#er s#a remain stand ,y to meet any emergency re4uirement.

c. Tranit Mier:

0 )ransit mi+ers are re4uired to meet t#e pouring re4uirement. $t east 02

transit mi+ers s#a remain stand,y.


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Rev. : 00

Date: 26.02.16

iii2 "n Cae O0 An* E7ui(ment ailure

)"o mo,ie pumps s#a ,e operationa simutaneousy. ne mo,ie crane s#a aso ,e present at

t#e pouring point as contigency arrangement.

0> vi,rators s#a ,e re4uired to compact t#e concrete at one time; 01additiona vi,rator s#a ,e

stand ,y.

#ours of pouring; surface s#a minutey

,e inspected. )#e sies; verticaity and diagonas s#a ,e noted. $ny defect s#a ,e treated

as under:

• C#ipping of t#e defective; depressed or ,uged surface "it# ig#t c#ises and remova

of oose partices.

• Soaking t#e surface "it# "ater

• $ppication of Bonding Bridge; consisting of 1 part op cement; 1 part sand and 1 part

i4uid ',y voume(. i4uid is 1 part SBR Bonding $gent E 1 part "ater. Bonding ,ridge

s#a ,e appied at saturated surface dry condition in 1 to 2 mm t#in ayer.

• *#en t#e ,onding ,ridge is sti "et; repair mortar as per foo"ing composition.

%ortand cement : =0 g

Sand : 12=g

Bonding agent : & iters

*ater : 12iters

$ppro+imate yied : 0 it

=mm sie coarse aggregate '2= kg per =0 kg cement( "i ,e added to a,ove if t#e

repair dept# e+ceeds 12mm.

12=ualit* Aurance+

Guaity assurance team "i ,e appointed at t#e designated site. )#e team "i ,e #eaded ,y

GC in C#arge. )#e GC in c#arge "i ,e assisted ,y t#e assistant GCs. )#e team "i ook ook

after t#e foo"ing points to ensure t#e up to standard and 4uaity "ork.

• ig#ting of t#e area ,y food ig#ts so "ork continuous "it#out interruption.

• *ater pump is provided for continuous suppy of "ater. *ater Booer "i aso ,e used

as contingency measure.

• $naysis of t#e proect documents and on time su,mission of t#e RF.

• Deveoping t#e concrete structures 4uaity performance pan.

• C#ecking t#e Reinforcement assem,y and cross c#eck it according to approved ,ar

,ending Sc#edue.

• Deivery; reception and site transport of concrete from t#e Batc#ing %ant.

• Casting; compaction; Cutivation and protection of concrete.

• $naysis and preparation of t#e reports on t#e procedures of conformity assessment ofconcrete "it# t#e proect.

• Su,se4uent testing of compressive strengt# of concrete.


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Rev. : 00

Date: 26.02.16

• )#e adustment of t#e geometry of t#e concrete eements of t#e designed sie.

• C#ecking t#e consistency of fres# concrete on site.

112 %eronnel 3 Man(ower+

• Site 7ngineer

• GC 7ngineer

• $ssistant GCs

• 20 Stee Fi+er

• 2= Carpenter

• 20 Scaffoder

• 20 -ason

• 20 a,or

• 02 Surveyor

142 Health and Sa0et* Management and Control Meaure

%ersona protective e4uipment: $ operatives "i "ear t#e foo"ing: safety "eington

,oots "#ist "orking ; safety #emet; #ig# visi,iity vest and goves.

Site rues: $ operatives "i ,e informed 'via a site induction 8 too,o+ tak( of and

e+pected to compy "it# t#e contractorHs site rues.

Specific site #aards: $ny specific site #aards "i ,e identified and deat "it# prior to any

e+cavation "ork.

$ccess to t#e "ork area: )#e provision of a safe means of access to t#e "ork area is t#e

responsi,iity of t#e contractor 8 cient.

Fas into e+cavation: )#e ground"orkHs su,3contractor must provide and maintain fencing

to prevent operatives from faing into t#e e+cavation "#ere re4uired.

*efare faciities: )#e contractor 8 cient must provide access to t#e "efare faciities.

Ri' aement Meaure Area "n charge

S#arp 7dges of -eta and

Scaffoding %ipes

S#arp edges s#a ,e ocated and

covered "it# ,arricaded tape.-r. -aik Iafar'D%-(

ig#ting $rrangements for

ig#t "ork

%roper ig#ting arrangements s#a ,e

provided for nig#t "ork

-r. Ras#id '7ectrica

Forman(

During Construction %%7Hs

must ,e "orn

During Construction %%7Hs s#a ,e

"orn propery.

-r. S#a#id


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Rev. : 00

Date: 26.02.16

Remova of Form"ork

During Remova of Form"ork under

t#e sa,; specia care s#a ,e ensured

for safety of "orkers and aso for

structure.

-r. -aik Iafar'D%-(

Ceaning of Construction

$rea

$fter competion of t#e concrete s#a

,e muc# ceaned after competion of

structure.

-r. -aik Iafar'D%-(

12 >o) Ri' Anal*i

Sr2

No2Acti/it* Haard Recommended Sa0e %rocedure

1 *orking *it# adder Sip; )rip; Fa;

7ectrocution

1. $"ays face t#e adder "#en cim,ing. 2.

adder must ,e secured from movement. .

Do not use -eta adder "#ere t#ere is an

e+posure to eectrica #aard. >. adder s#a

,e of t#e proper sie ! design for "#ic# it is

used. =. Fa protection must ,e "arned if

"orking of adder in e+cess of 06 feet a,ove

t#e ground. 6. $ adders s#a ,e erected so

at east t#ree feet of t#e rai e+tend over t#e

anding

4*orking *it# . %orta,e eectrica toos s#a not ,e

ifted or o"ered ,y means of t#e po"er cord.

Ropes s#a ,e used. =. ny appropriate

toos s#a ,e used for t#e o,. 6. Damaged

toos8e4uipment s#a ,e removed from

service ! tagged "DEFECTIVE"

5 7+cavating 7mpoyees "orkingin t#e ditc#K %otentia

for Cave3in; %otentia

for atmosp#eric

#aard

Striking personne

"it# in radius of

,oom feet deep

re4uires confined space permit. $"ays

monitor at a time "#ie empoyees are in t#e

ditc#. Competed mark3outs of utiities and

e+cavation permit prior to start of e+cavation

"ork. *ear proper %%7.

)#e competent person "i ensure ! e+amine

area ,efore "ork. eep spois pie at east

t#ree feet from edge of e+cavation. eep

non3essentia personne a"ay from "ork

activities


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Rev. : 00

Date: 26.02.16

Bad "eat#er f rain8 ig#tening starts stop a activities !

reassess t#e situation

6 5radingStruck ,y;

Caug#t in ,et"een;oise

nsure t#at a ,ack up aarms and ot#er

safety e4uipment are "orking propery. *ear

seat ,et.

*ear safety gasses.

*ear #earing protection during operations

"#en re4uired ,y noise eve a,ove = dB'c(.

Safety vests to ,e "orn at a times.

Deep 7+cavation*a coapse;

engufment

7+cavations deeper t#an ft. in dept# re4uire

an e+cavation pan. )#e re4uired e+cavation

pan must ,e compied "it# at a times. $

e+cavation egressHs s#a ,e inspected daiy

and maintained.

7+cavate sopes to 1.= to 1 ratios; '> L

Degrees(; insta trenc# ,o+ "#en inade4uate

space is avaia,e for soping.

*atc# for signs of coapse 'tension cracks;

ground settement; "ater seepage etc.(.

Safe3off e+cavation area as re4uired.

8 Compacting*a coapse; noise;

engufment

nsure t#e vi,ration does not coapse

e+cavation. *ear appropriate #earing

protection if t#e noise eves re4uire it; a,ove= dB'c(.


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Rev. : 00

Date: 26.02.16

1 $rea %reparation

7mpoyee %rotection

Sips; trips; fas;

uneven surfaces

%#ysicay inspect "ork areas prior to start of

"ork. Foo" good #ousekeeping practices:

create "ak"ays. $ssure materias ! de,ris

does not ,ock traffic. eep "ork areas cean

! neat; free from ru,,is# ! de,ris. *atc#

"#ere you "ak. Be cogniant of your o"n

safe "ork practices as "e as t#ose of your

co3"orkers. Be carefu on sopes or

"et8muddy areas. $ppropriate "arning signs

"i ,e posted

11 5enera Site Security

Mnaut#oried access

,y


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Rev. : 00

Date: 26.02.16

1:Site -aintenance

%ersona nury

)ripping ! faing

%roperty Damage

Be sure a de,ris ! materia are stored to

avoid tripping #aard. $ "ork areas are kept

cean

$ "ork areas are secure from unaut#oried

access


%age 12 of &

bk-hh-qac-ms-0017 - foundation of central control room & switch gear building

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