Degree in Surveying/Construction Practice F202QSP Assignment 1 Retaining Wall
Assumptions 1 Reinforcement bars deemed to be plain not deformed etc Concrete for wall and foundation assumed to be same grade an 2 aggregate as piles ssumed ground conditions with no ha!ardous material etc and 3 ground water various e"tra description to items assumed if over and above 4 srcinal spec 5 various assumptions as stated in rate build up
Bibliography: C#$ %2&13' Site Preperation, foundations and basements( )aper 2*35v*( Reading: +he College of #state $anagement, C#$ %2&13' Reinforced in situ concrete( )aper 1423-4.&( Reading: +he College of #state $anagement, /R$2 %2&13' R0C /ew rules of measurement %first edition'( Royal 0nstitute of Chartered urveyors
Christopher , illis( ndrew illis( illiam +rench and andra ee %2&12' illiss #lements of 6uantity urveying %11th #dition'( iley.Blac7well
Degree in Surveying/Construction Practice F202QSP Assignment 1 Retaining Wall
Taing!o"" list #"cavation 8isposal piling
5.6.2.3 5.9.2 7.2.1
piling insitu reinforcement concrete formwor7 reinforcement filling
7.8.1 11.2.1 11.13.1 11.33.1 5.11.2
Retaining Wall 8epth at each section average 1,21 1,91 1,* 2,91 3,*
#"cavation
#"cavation to foundation( over 4m not e"ceeding *m deep 5.6.2.3 2,5 1,21
1st
2,5 3,*
5th
4;
2,5 4,42
2nd=4th
2;
2,5 2,91
3rd
"4,5;4<
m2
= 8isposal of e"cavated material off site 5.9.2
)iles
5;
4,12
Bored )iles( cast in.situ( 45 degree reamed bases( 4&&mm diameter( 4m bored length( 4,12m concrete length( 5 nos, Concrete grade 2&( 2&mm aggregate( Reinforced with 4 nos " 1*mm diameter mild steel bars and 1&mm mild steel lin7s at 2&&mm centres( top 15&&mm formed in light gauge steel tube to be permanant casing 7.2.1
5;
&,13 4,&&
8isposalofe"cavatedmaterialoffsite%frompileboring' 5.9.2
pile cross section 3,141;&,2;&,2 &,125**
5,&&
#"tra over piling( enlarged bases( 45 degree slooped reamed bases 7.7.1
2&;
4,34
1*mm diameter plain mild steel pile reinforcement bars with 1&mm mild steel lin7s at 2&&mm centres 7.8.1
Re.inforce Bar length %m' 4&&& 2*& >& 434& number of lin7s 21,9
11&;
1,25
1&mm plain mild steel lin7s to pile reinforcements at 2&&mm centres 7.8.1 ?oundation
1>,&& 2,5 &,&> 1>,&& 2,5
&,3> 23,&
)lain in.situ mass concrete as b linding(hori!ontal wor7 less than 3&&mm thic7( poured against earth( Concrete grade 2& with 2&mm aggregate 11.2.1 )lain in.situ mass concrete foundation(hori!ontal wor7( more than 3&&mm thic7( Concrete grade 2& with 2&mm aggregate( reinforced less than 5@ 11.2.2 )lain formwor7 to sides of foundations( less than 5&&mm high( 25&mm width and 3>&mm high( formwar7 reAuired to all faces of concrete 11.13.1
24&;
3,22
2&mm diameter plain mild steel reinforcement bars at 15&mm centres with 1&mm mild steel ditribution bars at 29&mm centres
Re.inforce Bar length %m' 2>*& 3*& 322&
11.33.1 44;
>,5
1&mm diameter plain mild steel reinforcement distribution bars at 29&mm centres
number of bars
11.33.1
12& Re.inforce Bar length %m' &&& .5& >5& number of bars 1&,252525
all
retaining wall diagram %a1' T= 380mm
&,44 4,45 1>,&&
)lain in.situ mass concrete batered faced retaining wall(vertical wor7( more than 3&&mm thic7( Concrete grade 2& with 2&mm aggregate( reinforced less than 5@( board mar7 finish to e"posed face( shape see diagram a1 11.5.2.1.2
&,15 &,15 1>,&& 2;
4,45 1>,&&
Extra over fillets see dra!in" #$$21%
)lain formwor7 to faces of retaining wall( battered to both faces( formwar7 reAuired to all faces of concrete( allow for fillets at the botom 11.22.3
&,3>
)lain formwor7 to top of retaining wall( formwar7 reAuired to all faces of
H= 4450mm
1>,&&
concrete 11.22.3 B =500mm
Bac7filling &,*& 1,&& 1>,&&
?illing with imported material( hardcore( *&&mm deep( to front face of retaining wall 5.12.3 dedu&t
&,15 &,15 1>,&&
'rea of fillet trian"le se&tion, so divide b( 2 for total m2%
8epth at each section bac7 ?illing with e"cavated material( e"ceeding 5&&mm deep( varying depths with contours( to bac7 face of retaining wall
1,&& 1,5& 2,&& 3,&&
5.11.2 2,5 1,&&
1st
2,5 4,&&
5th
4;
2,5 4,5&
2nd=4th
2;
2,5 3,&&
3rd
4,&& "4,5;4<
m2
dedu&t &,15 &,15 1>,&&
'rea of fillet trian"le se&tion, so divide b( 2 for total m2%
