Download - 004 Design and Checking of the Foundation
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
DESIGN AND CHECKING OF
THE FOUNDATION
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
DESIGN AND CHECKING OF
THE FOUNDATION
For the foundation design it is necessary the !a#ing of a geotechnical study.
Geotechnical study has the urose to identify the tye$ status and !echanic
features of the layers %hich co!ose the foundation terrain on active &one of the 'uilding$
and also hreatic level and su'terrain %ater characteristic in sight of esta'lishing the
conditions of foundation for the 'uilding.
Function of the follo%ed urose it has 'een esta'lished a volu!e of terrain
surveys consisting of drillings$ %ith the ossi'ility of 'ea#ing(off the layers on all the
active &one of the foundation .The sa!les of soil ta#en fro! the drillings %ill 'e analy&ed
in la'oratory.
Also there %ill 'e consulted end the geotechnical study reviously !ade in &one
and in surrounding.
In the studied &one it is designed the 'uilding %ith the follo%ing characteristics)
( regi!e of height * +,+-E
( strength structure fro! reinforced concrete fra!es !onolith + sla's !onolith + closings
of B.C.A.
( foundation syste!) isolated foundation fro! lain concrete and elastic ele!ent of /.C.
under fra!e colu!ns
After the interretation of the geotechnical value resulted fro! din la'oratory
analysis of the sa!les ta#en fro! the drillings 'ut also fro! consulting the geotechnical
value fro! unitary rofile of stratification$ on e!lace!ent result the follo%ing
stratification)
0 1ayer I ( argillaceous sandy silt and has the follo%ing characteristic)
h" 2 3.3 !
4 2 "5.65 789!:
; 2
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
II.Determination o "earing ca#acity o oundation terrain.
, l 2 !c 4 8" + q8
33.>2
l
'2
1
B
c
c B 2 1
Af 2 B 1 B 2 3:.- B D
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
III. Determination o t!e oundation c!aracteristics.
0 foundation %eight)
Gf 2 1 B f 4 ' >.53 2 ?"H 2 :56 78
,eff.!aM 2 ," 2 -:>.3 N ".< , l 2 -6:.< 789!<
,eff.!aM 2f
tot
A
82
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
The elastic ele!ent %ill 'e reinforced at inferior art %ith a 'ar net %hich are
arallel %ith the ele!ent lines. For the !o!!ents calculus necessary for the
reinforce!ent$ %e ta#e fro! the colu!ns 'ase corners$ straight lines inclined at -3= fro!
the foundation aMes. It is considered that the four o'tained surfaces are constrained in
colu!n and are loaded %ith a reactive ressure fro! the 'otto! elastic ele!ent.
0 Ac 2 lc ( 'c 2 ".< 2 ".--!<
0 Rc 2 'c lc.33H9< 2 >.:
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
y2 F H F H>:
:
&
>"
<
yc + E
6
l( (.:3 P >.>.:& 2 hoy P >.>" 2 >.:.>" 2 >.:"3 !
Re use C [email protected]$ %hich has / c 2 @> da89c!5:.>2B> 2 >.>@
> 2 >..>3
Aa& 2 <cy>y
c!55.52">>
"E3.:"E2
">>
'EhE 5;"< Aa&
eff 2 ?.>3 c!<
$I. Esta"lis!ing t!e dimensions o t!e oundation "loc&.
In the case of rigid foundation it has to 'e resected so!e value of the rigidity
angle.
l" 2 !6>.>2<
." P ->.<2
<
l P l c
"l
hO".:
6>.>
hO ".:> h 2 >.5> !
The 'loc# %ill 'e reali&ed in t%o stes h" 2 >.-> ! si h.-> !
$II. T!e 'eriication to local #ressure under t!e elastic element.
@
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8/17/2019 004 Design and Checking of the Foundation
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“Gh. Asachi” Technical University of Iasi
Faculty of Civil and Building Equi!ent Engineering
l< 2!6>.>2
<
>> 2 "3??@ 78
$III. T!e c!ec&ing o rigidity angle.
( on V(V direction) tgW" 26>.>