8/20/2019 Method of Statement- Junction Chamber

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Methodology of Construction of the Proposed extended chamber for the land junction chamber at Mu

8/20/2019 Method of Statement- Junction Chamber

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

Content

 

Page

1. Introduction 03

2. Organization Chart 04

3. Working Plants & Equi!ent 0"

4. #esource $chedule 0"

". Critical %aterial uantities 0"

'. Construction Progra! 0"

(. Construction %ethodolog) 0'

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8/20/2019 Method of Statement- Junction Chamber

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

1. I*+#O,-C+IO*

 Pl inserts Project Description

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Site Engineer

 Technical

Ofcer

Forema

n -Culverts

Site QS

  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

2% Organization Chart

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8/20/2019 Method of Statement- Junction Chamber

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

3. Work Plant and Equi!ent

 

 &os

 

'tem of e(uipment Capacity

)C* + Mini ,xca-ator  !  

Concrete Mixing m+c ! . *ag

Wac/er + 0ammer  !Water Pumps 2 ! .1

4. #esource $chedule

,E$C#IP+IO* %a

%ano/er $chedule

ite ,ngineers !3echnical 4fficers !

5oreman !

*ar *ender 2

Concreting Group !

6abors 7

". Construction Progra!

#eer **E 01

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

'. Construction %ethodolog)

3he Construction se(uences of the proposed wor/s are as below9

'.1. $ure)ing and Preli!inaries

!% *efore any construction wor/s9 the area will be cleared and le-els M6; are

established%

2% 3he construction area will be demarcated by means of warning barricades% 't will /eep!%8mor maximum can be ta/en at closed to the adjacent timber house; buffer from the

exca-ation lines%

$% All closed residencies will be noticed regarding the construction wor/s and the time

 period%

"% 3he nearby coconut tree and other trees will be remo-ed and uprooted% pecial care

will be ta/en to not to disturbed to the adjacent houses and parapet walls

'.2. Ecaation /orks and $horing

!% ,xca-ation line will be mar/ed with !%8mConcrete wall $mm < horing 2mm <

wor/ing space !mm; offset to the existing structure% 0efer **E 02 = for

exca-ation lines

2% ,xca-ation will be commenced from the far end of the gra-el road and proceed to the road

side%

$% 3he exca-ation will be carried by *ac/>hoe loader or by mini exca-ator% 3he full depth

will be exca-ated in one time% 3he suitable material will /ept at stoc/ pile to reuse for

 bac/filling% 3he suitability for bac/filling will be confirmed with the ,ngineer before it

stoc/ pile% 3he exca-ated unsuitable material will be directly loaded to a ! cube tipper

and remo-ed from the site

"% As per the soil report9 the loosed sand a-ailable for 2%m height P3 -alue less than !8;%

3herefore9 special care will be ta/en to a-oid the collapse the exca-ated walls% #eer

**E 03 for temporary shoring system%

8% 3he ground water table expected to meet at !%m depth% 3herefore9 it will be prepared tolower the water table at construction time% 3he remo-ed water will be discharged to the

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8/20/2019 Method of Statement- Junction Chamber

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

adjacent drains% ubmersible water pumps will be used for the purpose% 3wo poc/et will

 be formed below the 2%m depth to /eep the pumps%

?% 't will be proposed to ha-e temporary !8mm thic/ G!8 concrete co-ering up to !%"m @

2%m depth including the construction bed to a-oid water disturbance to the construction

area% #eer **E 03 for temporary concrete shoring at wor/ing space% ,-en after the

temporary concrete9 ! pump will be /eep for any emergency purpose%

'.3 Construction o Proosed Cha!5er

!% Construction of chamber will plan for two stages

• $tage 01 = p to ground le-el 2%m height; including the slab o-er the existing chamber 

• $tage 02 = Abo-e ground le-el $%m height; < Construction of top slab with steel manhole

co-er 

2. $tage 01 - to ground leel including the ground leel sla56 2.0! height7

i% A /ic/er will be formed with the G$8 concrete base to /eep the support the formwor/ at

 bottom%

ii% 3he reinforcement will be pro-ided as per the construction drawings% 3he reinforcement

material will be get appro-ed before bring to site%

iii% All the bending wor/s carried out at close to the site and fixing wor/s done at the location%

i-% 5rom wor/ will pro-ide up to the ground le-el% All form wor/ materials are smooth

finished marine plywood% #eer **E 03 = for 5ormwor/ arrangements%

-% 't will plan to do the infill concrete with the same G$8 concrete% Bence only outer form

wor/ pro-ided%

-i% 't will be planned to concrete up to 2%m height at one time up to ground le-el;% 3he

concrete will be from 0eady mixed G$8 concrete%

-ii% 't will ta/e special care when placing the Manhole M2 anchor bolts at exact location% A

temporary plywood template will be fabricated according to the manhole co-er dimensions

and bolts are placed according to the drawings at this template% 3he template will be /ept

while concreting and will chec/ soon after the concrete and will carry out necessary

adjustments immediately%

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8/20/2019 Method of Statement- Junction Chamber

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

-iii% A plat from form and chutes will be arranged to place the concrete carefully%

ix% 3wo 21 po/er -ibrators are arranged for the purpose%

x% 3he -ertical formwor/s will be remo-ed after 2" hrs and start curing the surfaces% Wet

gunny bags will be pro-ided for the purpose%

3. $tage 02 5oe the ground leel 6 3.0! height7

i% 't will be constructed at two concrete at two steps as each step with !%8m height%

ii% #eer **E 04 = for inner and outer form wor/ arrangements

iii% 3he ladder rungs will be pro-ided as per the drawings and specifications% Prior appro-al

will be ta/en to the samples9 before bring to the site%

i-% Concrete will be placed by means of concrete buc/ets and it will be raised and positioned

 by )C* or *oom>truc/%

-% A platform will be arranged at middle core of the chamber to ease the concreting wor/s%

-i% A polythene layer will be pro-ided to the existing chamber top to a-oid the dirt will fallen

concrete%

-ii% *oth formwor/ remo-ed with care and commence curing wor/s after 2" hrs

-iii% #eer **E 0" = for formwor/ arrangement from !%8m @ $%m height%

ix% All other concreting wor/s will be carried out as same as concreting on G%6 @ !%8m height%

"% 8iing o 9andrail and $teel $tair case

i% All the material will be appro-ed before the fabrication wor/s

ii% All the fabrication wor/s will be carried out as per the drawing finaliDed with ,ngineer%

iii% Erilling of concrete wall will be carried out after 2! days of concreting the wall 40 as per

the instruction by the ,ngineer%

i-% All steel wor/s will be apply two anti>corrosi-e layers before the painting the same%

'.4 $aet)

All labour will be pro-ided with necessary personal protecti-e e(uipmentFs PP,; as per the safety

manual%

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8/20/2019 Method of Statement- Junction Chamber

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  ompany Name

Project: Greater Colombo

Wastewater Management Project

 Method Statement for Construction

of Proposed extended chamber for the

land junction chamber 

Page :

Aug 2!"

?%" Eniron!ental

Always follow the project en-ironmental Management plan%

Page #