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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Settlement studies on the National Museum Building, Ottawa, Canada
NATIONkL H'Sr;P\HC'f.i C O U M C I t OF CANADA LIl'JIS IdN r)F BUIIA.'ING RT- SFAHCH
SETTLEMPNT STUDIES ON THE
NATIONAL MUSEUM
BUILDING,
OTTAWA, CA1iAT.AA s a t a t a n t Reaerrah Offiaer, S o i l Meohmtee Seation
OTTAP:I\
November, 19%. DBR He ort
DIVISION OF B1!ILDIMG RRSBAHCH
SE'i"TLEME1lT STlSDI$S ON THE
KATIQNAL
MUSEUM BUILi3fNGm OTTAWA, CANADACarl
B e
CrawFordAlniatant Hesearoh O f f iuer, 9011 luisohanics Seotlon
A paper rubmitted
to
the Third International Confareno. on So11 Bpleahtanios and FoundationEngineering, S w i f k e r l e n d ,
1953.
(3eaeion
4
SactionVI)
'Ihe bu:'ldirag
for
the National Museurn o f Canada l a a four-storey s t m a t u r e ebout400
f e a t long and 150 f a e t wide nith heavy e x t e r i o r w a l l e of sandatone resting on spread footings. Since aompletlon ofthe building in 1910, f o o t i n g load8 which
vary
from about1
1/2 to4
tans per a w a r e f s o t ]nave caused a difr'arrsntial asttlsrr,ent ofmore
than 1 1/2 f e e t ,
b r i n g s show that thts building is underlain by about 50 f e e t
o f m n a i t i v e , eomp~ssaibl@ marine a l a y . Below t h l a i s a v a r i e t y o f
i
s i l t y o l a y a , oleyey s i l t s , and sands. Glacial t P l l ocourr a t a
depth of about 120 f e e t and bedroak tat 132 f e e t . Regular engineering
t e s t a were performed on undiarturbed sar:2beg obtained outside the influenee o f thr, b u i l d l w in order t o d e b n n i n s p a i n s i a s , ratrength, eunrolfdetion and p l a s t i a i t y oharauteristlar o f the sotl.
An Attenpt i a made t o datermine the oaura of arettlemnts and
to
con:pute
settlenaente using a011 meahanion theoriess T h ~ a a rsavemente_
are onmpared with aaturl s e t t l a m n t ~ . T b o r a t f o a l bearing oapaoltyIs compared w i t h estimated n o t u a l baaring; ~ a p a o i t y ~ Conqents are
. made on the existing f o ~ d ~ t i o n design and a deslgn whloh
would
have basn chorsen for t h i a building on the b a a i a of modern prectloe.f A PkUmB* Hattonal du Csnabs,
aonatrult
m1910, r a t
rpn b a t h a n tds quaat~a +%tag@@ d ~ a
p u
2m?rhOO
piec2lr dolongueur
+t 150 pisdm d. LBIF~IIUF rvecs dasr laosrbs ~ u r s sr.tir?arurea an d r rt a i X l 4
arerepountr
aur
dcrs ar.i;lut,tazantr..L.n
n I l r r ~ e r3es f o n d ~ . t l : w s , qczi%?aria
de1.5
If
Wrrneie ptir pZed ~ F ~ P I ; ~ IP prownqub 64s t a s a e m n t a d i r f d a ~ ~ . n t i r l md.
plumJe
1.5
p i s d s .Lea ~ ~ ~ , d & f j e ~
ont
rZivd16 qua 2. blf;iaront a r t ngtu8 a w m e souobrrde $"J ,hcde dpnrgiZrs
:..arlna
t d o n e n e i b h at; n a ; ~ m a s l b 2 e . Plus b a r on trcuvs b e rrgl3an rrtablonrmugata,reb'bos
ar@ilauzt
e t stablesfin#.
L&
xmsa4n@
hlarcin$rr, eaEvlenasd
uns
p~rrf~3n&aur 6+ 120 piados$
la
roo&
& f a n 4 i!1p
~ ! L B ~ s . i4*err ~ l ~ ~t@at?daPA~ i donti
f a 3 t esur
do8e m a t t e a de ac?.nda&ea prsvlrmnt 646 f 0 ~ a g . 6 8 i t ~ & # en 6ahOrt~ (j,
l"nfl~-exsoe da l a a h r @ du
bbtimnt,
avsa 1s but dDabtantr Xaao1~l"r)~kt:on ~ar1:3aBP18triq~.~ la r d n i a b r m s
8u
c r S ~ b l l e m e n t a tlor
asructSrl
~ t i q u e r da oonaolidatlnn st p l a n t l a i b 6 .9x1 e tbenryb
da d4tsbminer
lee aausss der, k e r a m a t a si; dm rrafaular Iss Oaaemaanta p r o b ~ b l a a ae b e a n t surla#
t h b r i r a da l e i IrrQciniqua densola.
Cannouvamnts
ant BLt6
a o m ~ a ~ b r avo8l a 8
kanenwntr aatUllXm e ~ t l m h a .
La
( ~ l p ~ l b i t dC04
wu~lt.ment thbrtqulr8t8 aolr:psrle erne 2 1 aspaoit4 crxiatnak mZs~&. IAI d i f f h m n ~ e 8
antwo
l e u
plena dun fondat3 on8 a~>pXlqu&r a t la8 p h n r qua rumteat4 t 9 dlwiahs
urtwlle~~rmt,
bar68 e w 1s pratique nodema,~ n t
9bdOTTAWA, C W P A
by Carl
B.
Crurford
The
foundation problem
of theMatloarrl i3uraum Eluildtn&
i nOttawa,
Canada,have i n % e m s b d ~ i n e s r r
r h o @ 1910
when,a f t e r
muah biffloulty,
thoa t r u o t u f . war aomp1at;ed. Qne of tha
funotion8
ofthe Divflaion
ofBulldlrqg Ra.s.roh
of t;B.Hationrl
Rerear& Cormail
i 8t o h v s a t i g a t e buildirrg problem8 in
C u n d a ,Raomtly,
th,Dlvirian
warg l t e n the oppastunlQ of
study-the
foundation oondltlons
or t h i s l n t e r e r t i a g s t r u a t w e .
T h i ri r
a 8unwaaryreport
ofthe maul%s of the study.
PIUUIDIlSQ PGSLOli
The
Mu8eum
W i l d i n g20
a four-rtorey struatura about
400
f e e t
low
mad150 f e e t
vide w i t hh0.w
sandstone bearing
w d . 1 8 rhit3h on ~ P 0 . d
f 0 0 t b g 8 .
A 8 w i l lbe 80.n
f r o m
th,
i l l u 8 t r a t i o n 8 ,
iti r
ana x a ~ l a
of Vlotmriur r r s h i t e a t u n
r ti t r marrive bartl
Slnoe
tkmm 18no reoord of
Umdesign loadr f o r the
W e u a , a might r n i l y r i r of t h e Buildirrg wa8
madoto
datenalm
footing loadr
on
ther o i l ,
Ifthe fwntlationr
wrclarauslbd to
b s
aompletaly f l e x i b l a , u n i t load8
upto
5
)/btans par r q u u s
foot
woulds x i r t .
No
doubt
the berryfoundation8
.rseapabla
of ooneiderable dl8tribution
o f load
andtba ealaulatad
footlagpmrrurea
mrebsXletad
to be wlthln56
of' th6aottaal prer8urea,
Loadartintaterr aoda i n 1915
.p.verg slose t o thore obtained
F i g u r e r
1 mad 2 shcnr thatf o o t i n g 8
rru at tw,d i r f o m n t
o l o v a t i o n 8
and thatunit
load8 + m y widely.
T h l 8&r
r e r u l t s d
in
8ororo d i f f m r e n t l a l aottlearrnt.
F a r t u n r t o l y , above t h e
groundf l o o r
t bi n t a r n a l a t r u a t u r e
18a l r r l o d o n t i r r l j on p l a k g i r d e r r
whieh
8pen t h o e x t e r i o r w a l l r , T h i r
herslrlowod r o l e t l v o l j
uniform sottlemmnt
of Untuppar
partionof
a;h.Buildingo
Th.bammrsat aad ground
floor.,
hotmvor,
are.upported on b o t h
e x t e r i o r
m d interiorfaotingr,
and8 o m n
distortiono f
thof l a a r a
andi n t e r i o r
w a l l 8 18a r l d a n t .
P i g u m
3
rhowr two t y p l a a l Sailureaof
i n t a r i o r b r i a k
w a l l s ,
Those P a l l u ~ s s , although rl-
i nappearmso,
nre n o tof gmat
r t r u c r t u r a l impsrtanoo,
T h esub-baaemeat N o o r
i s
as t s i k l n g
i l l u s t r a t i o n of d i f f o m a t i a l movamant.
Thmf l o o ~
undulate8
from
f o o t i n g t o foot-
.adt h t r a s p e a t 28 o f t o a axrggoretod
by thospringlag-up of foot*.
unbarozahwrys whom
-0l o a d
18Intwrrrrptod.
I nono lnatanao
between two heavy pillars aoontinu-
o u r f o o t i n g
hadbroken and
hadra1a.d
tbsf l o o r
bys o r o r a l inohom,
Conaeqrwntly t h eaub-baremant
floor 18.8of
1 L t t l o
umin
dwtomtning
a a t u d r o t t l n a a n t r ,
8 o t t l e m n t a wore notiood 0v.a
duringoonatruotion,
BY
1915
th.towmr
a tt h
f r o n t of
t bBuilding was
out o f
pluaabby mm than a
foot.
Conurquantly,
d w i n g t h a t y a m thoa e t t l o m a t
oft h o 0 u i l d l n g
w 8 8o w m f u l l y obaorvod,
f n 1916t h a upper p o r t i o n
o r t h o tower
wasromvod
t o prrrvont eaarpleto f ~ i l r t r o ,
PZgtwo4
rhowa
tbb u i l d i n g and, s o p w a t o l y ,
tkm origlnnltowor.
Ob8orvatlons fndisaBa
thatl i t t l o rottlonrsnt of Bh, Buildbsg
hasooourmd s i n e 0
t h otower
w a rr o ~ # ) f o d ,
POP
thla L Y ~ I O S Jp m s a w ~
ahmm
I.A ~ l g u r r , Ii n a i u d e
t bweight o r
tbr,tower,
T&
t o t e lweight of
tb Bubldingi r
about 65,600ton8
or
whiahl r r r
than 2$ i r l i v e load. The weieJht of a o i ls x e n r a k d
wra
about of t b w.Qbt of theB ~ i l d i r r g .
T h e rvarorrZof
the wpper
portion
of ths towarreduead
t berorraspondiag foot-
p r a a r ~ a r
b~35%.
S t r a a s
dirtributlan in
tbe r o i l benaathoariota8 p o i n t s
weis
6atarainad
usinginflusnea o h a r t r (Hawaaar3r 1942).
For thod a t e r a i n a t i o n
o faacrh
polnton
ther e ~ t i ~ e l
a t n u e
p r o f i l mfour
valuer wpm neoarsaryr
(1)a t m a r
due to o r i g i n r lovarburdan,
( 2 )
r t r a s r
duet o uppar footings,
( 3 )
a m a s dua
t o3 o w a ~
fwting8, and(4)
negativea t m a r
duet o
roil~ a ~ m v a d .
F u r t b rt~omplioationr
were introduead
by theoarir$y
oflooting p r a s s w a r ,
5avar.l t y p i o a l p r o f i l a r
of' r a r t i o a l strmsr
w i t hdapth
us
b u m %nFigura
5 ,
The6 ~ ~ r 0 8 g ~ k n d i n g
p o i n t s
un&r
the
b d l d h g
whera r t r e r a a a
w e r e romputed areahom
Pn P u u r a 1.A l l
obaurvations in
t h l r atudyware mda
f a r om-halfof
tbnbuilding.
T h i r hasriarpliffsd
the atudj urQ i 8j u r t f f l a d
beeatam t l m
building
i rr y m a t ~ i a e l 5n a h n ~ . , l a d i n g ,
end noturlsa
ttlesmnt
,
80XL SSFPDIBS~ o r ; t n g a
s b a w %hat th, Build-m s t r on a 1
fOlfooe soil
cbporit.
Th.
uppar
50f a a t traneirtr
ofeolpl+.rribla
ma*
olr$
whichgrad48 into olryay
s i l t , scurd md glr6irJ till w i t hi n o m a r m dap-.
Thia e l a j , deporltad
in aa a m of thea a r
whlohLnradad
t bragion mar
th+a o s a
o fi?lair?a6sna
ti-, $8o a m m l j
uallad
%da a l q " (JoLpJrton 1917).
I tm n r r
aend
Quabaa
pmrrin0.8,Two borlnge wore mado at p o i n t s
A
and Gar
rbwn
inF Q U N
2.Ih
boring A,aontinuouu
s a r p l l q war o.rciado u t to
a depth
of
80 f e a t , uaing a 2-inoh, thin-walls dp i s t o n
smqpler. I n t e r m i t t e n t s p l i tspoon
samples wore t&on below t h i s depthand
rockuar
e n e o u % e r e d at1%
Soat. A t boring C, o o n t h u o u rs a p l e a were awoured
to
a depth of45
foe*us-
a thin-walladpiaton s a w l e r .
In
add'tiont o
&are two boring8 outeldo tb.innuone.
of t h o Building, four bor-a warm madefraa
sub-
baaemant at p o i n t 8 Be
PI
$, u ~ dF
(Flgurl, 1 ) a d m d i a t w b . 4saaplos obtllinod, Owiw
to
the v a r i e t y of bombole and footiag olevationa,a l l araples
arm
r n f o ~ m dto
absolutm e l e v a t i o nabove a ~ a lava1 in foot. Tho ground I e r o l around t h o b u i l d l q 1s
at elovatian
234.5.
Laboratorj teati8
umm
pertormodon them
8alppl.8 urdthe r e s u l t s arm & o m in F i g m a 6 t o 11. F i g u r n 6 shows eh.
maul
ta o f g r a i n arise analysesof'
the ~umplesfmaa
bop- A.Yovoral rurdom b a t s
oa
r r a p l e sf r o m
t h other brings m e 4oloeoly with thwae r o s u l t a . In no aase did the pwrouatago of tho r r r i o u a il.aetions vary laor. than
7$
.nd the avorag0 orriatian u r aaC)$,
P i g u m7
show8 uater oontenta, Attorbe% l l w i t s and bluCa8agrmds o l ~ r s i f l a a t l o a (Guagrmb.
1948)
for saxples f ~ o rbar-8
A rad C.T b
averego wator oaatent owva w u obtrinodby avoraging gr?oupa of data.
Tho
mdromkr m d Attolsbsrg llait toat. mm porFom8d on ample t r b m h g 8 and are thorrfozw avmragosfor
the a m p l e ,osra,
a t alevation 194.0 reparat* Atterbarg l i m i t r w r a datemuhad
on two
d i a t i n o t
layers and the leeaultrr ~;r?l,ahown ia
F I g w7.
Layer8
w i t h noregronounoed d i f f s r a n a s a
Inproportierr
rrol l k a l j
to be
pmrant.
Results o f
uneonfiaard oompres8ion t e a t 8 porforared a t
a
r a t e
of dtrsbfn e q u a l t o 1%p e r minute
clsla a r e f u l l y a u t .paaiman8
3
inohes
h%ghby
l*
inahen indiameter
f r o m
A and C boriagr a g l a s
are
abwn
In
Figure 8. Thearepage atawe,
"AR, wanobtained
byaver%*
grouprof p a i n t r .
The aotual strengthi r
oanridormd
t o
ba n e a r
thenaatimuln values obtainad
a8 8hom in a w n"B",
a l l o w h g
for sanplsdiaturbanaa
m dirZarurer near tha
s W a o e(Rutledtpa 19&).
The strangth of' tha u g p e ~rmaila
w a s graatlyafioatad i n
thelaboratory
b jf i r s u r e
m whioh I t w a 8thotaght would
not
appreoiabXy
redue.t h e
ine i t u rtrength.
8tt.aptswere mula
t o t e n t mmoulded rrpaoimoar
butt h e ~ n r i t i v i t y
ofthe
8 o l l
ma&thir i r g o s r i b l a .
Sarsr.3 t x 4 u i a l guiak-last8
waxwperfomed
on 8raplem
in
m
o f f o r t t o determino
thoa f f e o t
off i r s w a s oa
8tmngth
V ~ U but U ~ 0W%Ilgt o qP.Paftl8 diPf'ioUlth8
-8. ~ l l U l t 8rzot
awgortad.
Conrolidation t a r t 8 m r a p a d o m r d on undirturbed
rmplerr from
rllborcrhdlan.
Typioal pllsmrwa r o r a u s
v o i dm t i o
ourvom
r r o
rbowni n Figure 9.
Ttroapeaiel t e a t 8 ware
madeu 8 l q
d lload-
i n o ~ . m a n t r llnd thara rhowad
thepra-aonrolldatlon
l o a d
Wba Lncrraaud froa
16t o
3% byslaw
lording.
SpeaZllia
yrrcrrityor t b
roil
partictlsr wea fousrdta
avmrwe
about
4.83 w%Bh 1P&$la vurirtioa thawagbo-ttttkm
top50 faat. Unit w%@b drtamdmat$onr
-r+
rab., rra rW'mngtb and crottrolidatlou m X m a urdrmr
t h a wm-lta
O ~ P W P & B p m r r w e iuor,
e ~ u w .i"rrwr
ooncslldrtioarr
$eat mstoltrtwo
aumer of tha
wmtpmbrbZ8
pawaon8olZdrtlsn lo&
w e pliott.6In
F ~ ~ w o 10 tog.UwP Vith t o a d n d affaatirs ovwbrrrdenr f m r w r .
Tua
iPlkrpzvtrtiap8or
t b ?potbod of p+mmaoXl61tJ0na m
p ~ r a i b l atma
%*at 1~l)l)Utb. C r u r ( l ~ (11, puwrllelm ~b8 affaeaiV8 overburden stress eww,W i , a a t r ~
prroaasolidatbn
arurrtd br ~t.pbwdera *&t ha8krrn
r+mvmb during tb. hlawrp
of
the m d l m t . Ousrp (21,prm31aZlq
t h
total o+.*irdm
rtmrr surrr,mprvurnta pllucsen.ol%&tlon
duo to tamper- lmerlsg
aT th.
grounbuaterWle
mmlng artewal aoomlldationdur-
t&hlr6am
sf the~ i l l m m a t .
Tb, i l i & a $cUapluoemnt t o
the
rwt would bo d r ~ t o rubaeqwnUy atripped o+.r*busb.n.A 8 b a t 8
36-7 a d
36-9 f r r r P ~bar-
A md h O t 8*&
rrrd
36-@
uc, fnar borirrg C, i t l rd V f i o u l t
t o d l r ~ a g u 4 there ~ e m l t a . T&n tw iatmrpp.trtlan8 &paidin
pa^$on
fbr rUl4iOjo f tern@ rrrruZtrr betwsn
elarrtioru
3~35 .nbaf.
IfFull
ws-4 fr divan t o bn+mreaultr
tbrraocuab
Int+rpmt;etioa. i s WNrrammsbla. If, baurvar, C b y ma^ be dirrr+yamkd the f i r a t
tnbwpretrtlan, owva (21,
Zr
w r areawarbb.
0 t h . ~krrt
m4Utlin ths t a n d i r k viehaltf suppop& M a b t e ~ m b t i r a r . 3 b
&owst.iar; o f ttw w a k r table uou&d
t h m f o ~
aavm had t o be rlooal
phoruwmarovor
rl l r i t a d
am&. TSzropiaioa
ofgaologiaOa
6- U ~ N P I O m ? w
I - F ~ & &
QZ%b
grOdilA1Q1ab~ t~bl+,r l t b n s ~ & mb,lble,
i n
q i l l kwalilt8ljlo
POP
tbam
maroar O U F I E ~ ( X ) %a 0 ~ ~ 1 1 d e m d b6 Bll,b a r t
inurpmt~tion
o fpreoonrolidr%%orr
load mb W8aurrv
ured
for
o ~ ~ o l l d r t ~ o n8atiblomat aalaufatiaar. 'Itbs
omaumensl,of
?%arum8
domato
a20ra0ion dl0and
thadndlcra~im
o f clLorisaat%tm down Iso bmak in fib+prwmn8oltbat2on
o w n , 8%.&*ration
a 3
I 8
avtdejzum
thrt thegawaursdwetmr
tabfa ha8b#n
10~lbrthan
1% $8am#
but not
m o a 8 8 a ~ I l jl o w
enough b olilaspmarnrolid+t;im
b070nU 6-
(1).
Or&
81- .ad ALk+era f i r i t 8 k 8 tmrm%tr
( Y l g u t . 8 6.nd
7 )
i n d l o a k that a c3SLai0~8 14feb fo2*a a r o l i d . t l o a
~ Q O W Ua t olevalcisn
164.0
cstU-r.
*rinw+
a ma180
oaour
at th.mot* alavattonrr a-IH tim ~IoUDQ w.0.~ MU8
h r
be# an#radasa t o the foot-8 by m t f ~ i a i r l &einqp.
Llberi
hilt,
therl8ration
sf aha&mamu
fiulldlrrg w t u r ~ o trelated
t~
a p e l ~ ~ ~ ~ a a t bmahmrk.
ThU.+fom,
tb.abloluw
sattkrasafi
or
t b h l l d i a j g hrrm hadto
b8a8BSlg.kd.
PcwQuaaWp,Ism1 posats
-PI,e8tebllmbmd
in
19x5 1;1~0ttl3dthe uutalb+ of
th.bullQSng
all
a t th. rrme a w m a 098Wn8.
srrrrrl
Z s - l 8aurwr ma+ arsbds durirrg 19l5 wkrg b b sntipuldrr a t rr-and
& $habuild-
u
~sfamrurea.
8 l ~ e 1 N 9 mauuwal
h v o l
rumwy
oft b
w i g h a 1 p a l a t m hUbeen
lWLdCI .IIa m m ykledrior
pint8ham
been addab t o
tbw
ru-y. rQy reatustLDg thaL t b 8 @antrrPaa8
ham
aoO
l ~ m d @ h a 0 bc#neQmmrt%on i t worrporaibla
W appawrlmat.th8W
mabraquaat
r+td;lmuat,9
p r o t t l ~ ~ F . . c I P ~ ; auteide~ 1 ~ 9 3 ) t a r
el+va*Poarm
und oolgrolnl;: wiWweaant
i n r i b
parl~3lrWlralavr%lonrr,
I t woeporstble
to rrppm%larat@ thr,orfgtina3
$murodfloor
aXevatlan,
rJy aaapssiw #oundfloor
e l a r r t i o n ruit'h
barsumat flow elsvatlona a t p o h t r
~rbova
m e m o f b t at ooluara~, loomlrlaar ( Y h a ~ 110Va1~ll$l 8bOuLd 000Ur a8 a w%t! % t Was p08ldib.0t o
datamino
tb originalbascrmt
~ S W ?alevat%on.
'Pbsre -ragart-#on8
wrr
-do
foraapacata
p a r t 8 o f the building usdin eaeb
8.m th+ p 4 8 U t 8 WI)m YifhiPL 000% td 0.03 II-tt;. WLth
original rlwa%lear Q**a-&aed,,
st
warpo8ribZa
b~ u r martala+;i
urd
memt
l a v a 1 poin$r,tagattar
#o draw the cbantowmQl
d W f m -tSaI 8 0 t t l + m n I r e
Xf t b urlllpption a t rsr,
rrovaaenti of
tt#l end+n$ranas8
Us8 Cmaa, the.+ e a r b u r r WmldnpFe8aXiE
abrolutr,
mttlmmnt,
4wevm, w i t h -1s arrwmptlton, p a ~ C 8
st'
tihe build- sj)rlobm a t
ds+p irOOtbng;8 m r u n d b ha+. ~ $ 8 - Oe;EO
PO@*,
bbM$ 8
no
ap-0; # a m tr3q bbwfmtlw8
Vhiah a m
l o a d t er.5
*XI#mr
BqUrUMlm t
P ~ ( U ) , W a 8 Q-0fld6.dthat
entrmmr worn
drqgg.4dom by
Chemin
bu&ldSmg, C a r e f u loba8mtloa of
tnr e n ~ m m r i n t l l e r k rthat
tbl8Ir
po8aible. A l % b u , g h tihm vertirtal stnmrr uncbr. p l a t "a*in
:,'igtrrc, $ rppellrrto
bm i n m f P i o i a a $to
ow8e eottlsararent, I t i'a breed oa ttasaarmptlon
o f oomplekilex3billtgr
ar
t b f'ortl~chtfon and w . ja o t u r l l y br h m r ~ + d duls
ts
8 U f ' f m s rof
tha slQrutu#l. 'Ph.roform t o o b b r i a abao1ut;e rsttZsrrmC Q,hO fee*ware
e d b 4 to rl;l o ~ t r t s u r aA ocmprslaaa of
elerntioar
Wan inl9ZS
and1951
shau
that during thut perfod ma m q r mttlamm&t
a t
0.10 f e a bbrs
oaourrvd
a l l ~ F O W t b .I?itrilwoxeep1;
1n tbb vlolaity o f tb. twar.&n
tbtwer
joku t b HuiZdiagno oh*.
tP
elmvrtiaa
ha8 O Q O U T ~ + ~ &we a d at tbmoulhr
adge o f Wast a m p t b
wells
r p ~ wt o b r a
t.2r.na b u t
0.13i
~
dmt
to rubLua8 &to,r.rsoorl
of
tboupp.r
p e t ; o? thetruer.
Th.
total n l t l o a m a t M a 6truo6u.mprobab%y
bcrmirtr
ofelratia,
plrstiio,aRd ooa.olidatioa
amt%l-t.
A n afi8ulllpt.d
etrlua*loa
o f t b rtol&*rSbubhr& ofmaoh ef
tb.88t o lam t o t a l
10tt3crmont
would br o f l i t t l e um ia v i a wor
tha
limitml
iniommtios oo
Usatrrngtb
propertlea afa i r
aoS1 .adt)w 1w.k o t fmtr
eoaoramiagl
tho Q W S Jh i 8 t o ~ y
or
th8IsuilcUage
O-pa1l.y opaaLingtr t b foot- Boad~
mxeard
t baIretlo rang.
of
t b sell so thutalartia estU-atlr
would
be ilolla-d by palratiodrf~rrrtione
Althowh tbi, oorptributinnof
@nebis
udmma,
a ooasidarable pPi.t Ort b
uot#.rsntahown lm
P L g w11
i r
tbqght t o be due t ot b m
OCUH~. mamaably . ~ ~ u r a t artetilrration
of t bammat
Of 8 0 1 ~ 0 l i d a t b naottLaaeaC
e ~ u l d pwbeblyba
uda
by d a b r ~ h l n gtho votiotion
in W P ~ ~ P rroatant hnedtrbrlyrwdkr
eemrm3r-tU%gr
rrrd t b i a w i t b baitla1 wr*arooakstr. O n e
or
the pwpsamrat
raLfsg boring& under UmbuPldlng
wrr
t o arabe tkda mwe~18m. S t n r l u ralrfslbutloaa
Ibru,buwmnr,
tbp* itia
888antid
tO ubt8in s p l a u d i ~ b t l y b a o wt b i ? o s t w r
tor
t M 8 pur,iae+. Thr air. o f tbo$bq$r urb gmmmdwrf+rolondltiaaa makr, t b pruawarant
af
thewamplee
U l t f l s u l t bu*"Ek
uurt
pursl%sa# teaturn of *for, wt$le)lcntof
%Swm t ~ ~ a t u r a
Q O O W P ~ l ~ ~ u x b d t58 o m % - 0 l m ~ l u
~ I b t a*t b
mar
Of thr, bui2-, wmrolly raprrr.uzk4 by polnC8 gl radh
b
F Q u n 1. hating
fomts
b . ~ Wrpart
l l ' l ~ h u v yund
j a t aet,tlrr#rbare
beerau a l l .
k pom8ibLa rrraaon rrgr b. thrtth.
rrxoovatiion w r slmft
longer
thun t a u 2 urtf tat &ry%qj irzomaamd t h pmaoa.o& ldatlain load.Tho ooewmmue o f rilt
lryrar
i 8 w o r t 4 o f e m * .It
l a bellmrcrd t h a t m i l tlayerr
U a e l 4w i l l
t a d W atat tha load aorm thao thee l a a t i e
lndieat6.8(for
e x 4 9 1 m m aTaylor 19128
or
Caragrmdo rrb Y a m 19&).Th.Fd'@mr
v a r l i o r lmtmar
p v e f l l a r ~n&rt
W
b u i l d l w
wan mb3.fS.dta
a ~ a t o a apyrorimkf y t o thm dmstarguwd t5rawy {a+. ~ y l o l r 39tar)ha
oicw
oST
th9 8 t t r t U i o m t i o aof
ttm aoll.a88
oP U m m d l f i m dvr1ur.m
rrbwodth.
0ompu;rkdmmttlesseea
r r h o u ~in
%&I@ 5 by 8-ta.
silt ~ Y ~ F I
W O U ~ ~a&
pard* l a k ~ d d l P d ~ ~ 0 fop -1%-datioa ead ro
aPlw
wn
sapid 8 m t t l n m t .~MrPsrLrrg aoyeoity ooqputrtiona w a oospl10uW by Um
uaururl
Puundatbn o u l s l l ~ o f tbnbullding.
IO
i r psrrlblm, fMwI,nPrto obtatn
.~pm~iWtcr values f o r ultl-bm bmuiryg c a p u f t y by arr- vulloua cllqulvalrmt cao4imgulrrfas&trrq~e.
Th.
followbg fomu3rm(Twrqpal 1943)
uara
u u dfar
d)riaaoaputatiola;
1)
Fbr
X a o d ahmo f a i l -C l - e t 3 , + y P t t l q
ubra
q-
taltint+ b8I;IPlrPg aap.01W o-
a e b a i u n
Y
=
uait
-%@at0s
m i l
Df r doplSfa 0% WblXI1$ a d J a w % W ~ Q Q +
Eta
= 5 7
for
@=
0lrip
=
1.0for
@-
0w h r v
+
=
smgloof
irstomel f'i-tet;%m2) Fbs
grsrsr.l
war
i r l l u r m q'-
elo'+
YDfNq'
W ~ MA(*'
-
3.0
rep
@-
Omfq'
=
1.0
t a r o-
0Om-Sulltr
atu
rrcPoiontlaad omrgworrin, r t m t h war uredfc#r thr
roluo of arohrrian, H u i l l u a value8 wem obkZ.wb u r w c p ~ ? . u "8"
in
Fburru 6 -4 abkimm V.luma urM o b t r b a d u b b g so- ' C ~ " ePer
90lllqlu~tlvm g u ~ ~ & e a tb5fo~%baga
0- be diridmd in$a f o u r gmtrrp8rI
I)
h o e t a r mCbrtha
t-r,
( 2 ) rquam foot3.n&ru a & ~
theo a t m
of
tk. b u i l w ,( 3 )
a l l remalawdeep ftmtirqgr,
(4)
all
&allow
iootbtgr. A aoqpuci-nof
aompuWd
v r l w r t o raturl bsaAag premmwe8
Is
.horn
ig Tabla d . Xfw i l l
b. reur
f r o m
thaw vrr2uer the* a l l toot-8 .ru rnfe f##g s a s t l l ro+w tatlure
waere
maximum
vrlulla iiBIp00km8laa a m
wed.This i r tba -8%
imr*ant ob8mrrrt$an
k o u l a et&
mu&mam valwrrfor
oobbrfon
o mt&
m a r t pmbrblsvuluer of'
mtur.l
roili nad i t 18 d ml i k a l y
that tUr brittleroll
wouldfail
in
ipamrel
o b a c rathsr than lseal 8iuu.
Speoiral a t t m t i c w shorrld be dr- Ico U m boarlag valuer
tipder
tb
W r .
AAthougPl tha footiryf grr&rrmrs ul. o r a o w d t o be &Bi&h$lyrora
than4
t;anu
p e r rpwrrv toat, t* wllr psob.blga rhfft ia tW crantn o f $~~ltitfJ o
t&
I ~ W I P t i l t e dmy
Q m m $hearln
bulldlng.It
i r l l k a l y the*thr
a e b ~ u l u l t i m a B m ba- a a p a a i w m8 n e w l y ~?Wa6bnd rod tho* I twar
mrm813s3yalom
ts
thn aompubd vaua.
zi?Euu
4.
All
B b z l W~ 0 0 t i - m 3.7 2.5
3.3
4.8
X.5-3.7
O f tho o a e r v a l m o &a Trblm it
it
i 8 muif i s l e a t $o a o k tba* Ilunimmralm8,
u a w r l n glaeal
mlm.1~. mdminimum
valuer br-4
oa anme
ma~nfirucf
crorqprerrir+ rtm)q$&a tar+e%6wd+d d-yit fMdzW9.
P h i 8
rttlby
naa t ~ o paxpoU8t f i r s t , t o compare f u l l -r o r l e nttkemmat8 with t b o r c l t i e a l
rttlrrrnt
oomputat&eaamad raoaad, to rtudy 8& 8n43twectngr gropurtrler
at
a m a r i a #ely wtzioh osoura
in
G ' t n . 4 .uul
whi&i r
probably 8-m t o.aw
n e b @
crlyr
iPs-r
aorsafrier.Tim
.soorad
p w t a ttb5r
e r t i m * a r
of
8 e t t l e w ~ Q . i tis
balleved that; tbr,mlrrtls
o& the B h o r y
of
oonrolidatloa dearnot .pply tor
tar . o l J . It 28mat
porribls on b b a t 8of
pmamnt ini~matitm
t odaW1LJljll#) the arfooti
of
08uh Of tiWm i a a t 0 ~ 8 .&dam aqglrmepiag gmmtica wad b v m e ~ m r k d
8everrl irqpmvaarnta ta
Wmf'oundettoa
doaignfor
this bull-.tbIFat
i t wUIQ not ba cdvisabX6 t;o have Sootlngr ont
m
lavslrr,
Th+ wb-bmamnt estrZb brvo
oomvoniantly
a%Wnd+d o m &#w ubl+
m a of tb+ MldS.mg,
mum
r e i r l a gtLM
w e u a o famavatad
. o i lw
WS of
$b,w8.l
mightof tha
barilw. Seaand,ao
footsag;
J l ~ 8 6 W O 8 h V O mxoeabad 2.0 -8 P O P 8 q u m f o c ~ s e Fbr t U 8 u k u o t u r a 8 b ~ d a m d . 8 1 8 ~ 1 1 ) ~
muht
bow 8 p . ~ l f l e d tfloatUag
r l rbfoundatdon d t h
ona&@3
t i g i d i t g $o r o r l r r tury
d l f f . r r s b 1 . Smrwnnt, Priatlan
p i l e 8 n o t auitrble sipra Ittr,-11
5 rb e e p i l e a would tH uubu;ly espsaelvr btsoeusm
~~~~~•
be*-%# not m a a d
a h r a
r dopto of 139 frzl%.'b
rtudyef
tba @ o i lan
whtob t n i artrucrttara
f 8 fc~aado4. har rh9#r tbrt tb. prodl~tdon o f rettlomoatr br&don
t b
oon+mt;ion.l
theow ofaonnolid.tian would
bo rronrldeablyIn
mm~p,
The -sum% for t h i 8 biaompmoy Urn n o t pt b n afouaa4,
C a a l p . x l l m 8
of
somaptated urda6tuaP
ultimata
be*aapaoitisr
8 b w tbollfto
ba qPit4 m ~ ~ u r a t eiLI
t h i rIU+.
P b reaultaalro
h d i o a t o %hat tharoll
stmqgthin r l t u ,
p a ~ t t o u l a r l yia t'b,
i i r r l u r d
sane, l a r p p m a i r t l y ligruatot than th. rtlrrngthof
.1rrqpl80.&3 -6 i u 1 ~ ~ 8 ~ 1 W a r n irr thr advlstrg~a o f
rrt@~rpcrrt
nab rtt+rptbg W e r p l o l n whae hrr hrgprrnrd ~aOb1? thra twLllgks p-bla*
f m m
l i d t a d 6 ~ i d m 0 0 W L u tw i l l
Althoughfouabnttoa
h a
r u l f l l l s d i t 8 purpoamM t W r
thkl wmul& b r expooWd, l b rprrfonrrraao
ku8 rLrwwn the d i 8 r d r u r t y m sof
Wmo l b r trrditimml. apprearrb a8 aowemd ultb th.
praoeat
4 4'Ph.
work
presented i n this paper has been a d e p o s s i b l ethrough ths 00-operation and kind assirtancue of
&.
6 , A , Gerdner, Chief Aruhitect of the Federal Department of Pub110 % ~ k s andD r . P. J. Alcock, Curator o f the Muse.clm and wmberr of t h e i r s t a f f s .
The author is indebted t o many a a s o c i a t a s for a s s i s t a n c e , in p R r t i a u l a r t o tdeasrr. D , J b L , Kennedy, K o N e B P l m end J.D.MoCrea of
the D i v i s i o n
of
Building Researahf o r
woxlk on the l o a d a n a l y s e s , t a a t i w,
and coaputationr Many h e l p f u l suggestions were r e c e i v e d from fdetmrr, W.R .Schrievsr and E'.L,Peekover,S g e o i a l mention sh+uld be mads of the enoourlagemnt and
r r s i r t a n o e g i v e n to the author by kr. Ii.F.Legget, Dlrscrtor of the Divlaf on of Building Hesearuh w i t h whose perraission this papr I s pre rented.
LIST
OF
ILLWSTRATLUMSFigure No.
1
23
Foundation prseeursa
In
ton#
par a q u m footLocation of Borings A and C r e l a t i v e to building llluatration of typioal
mttlement
orcrakrin
ba B~met
nt
General view of building showing portion of tower to moved
Verticral straas diatributlon under t y p i o a l points
Diatrfbution of p u l n sire w i t h Q p t h (M.I.T.
olasaifiaatton)
Variation of w a t e r eontent and Attsrberg llmltr with depth
Variation of unaonf ined aompmsaion etmngtb w i t h depth
Typioal prsasure void r a t l o oucveo
Variation
OF
overbmden and p~eocrneslidation # t r e s s e s with depthREFERENCES
Caeagrande, A. (1948). ClaraifictaBion and Idantifioation
o f
S o i l s .h e r l o a n Socisty of C i v i l Ebginarsra. 'SFanaaetions. v.113. p.901-99: Cesagranda, A. and R.E.Fadum (1944). Application of S o i l Meahaniaa
i n
Usrigning Dullding Foundationer.
h s r i o a n Soaiety of C i v i l Engineers. Tranaaotiona. v.109. p.363-490.Johnrton, W.A. (1917). P l a i s t o catno and Reoent Deposits I n th8 Vioinity
of Ottawa, with
a
Dasorigtlonof
the S o l l a . lOsmoir 101,11.84,
~ e o l o ~ ; i e t a l S e r i e s , Governmnt P r i n t i n g m o a u , Ottawa.6%.
leumark, N.M.
(1942).
I n f l w n o e Charts f o r Computatfon of S t m a c e s i n E l a ~ l t l ~ Poundationre Engineering Ewerimant S t a t i o n E3ulIetln. S e r i e r No. 338. University of Illinois, Urbana, 111.28
p aRutledge, P .C
.
(la)
.
RslaLionof
Umdiaturbed Sampling t o Laboratory Testing.Amariaan
Sooiety o f G f v i l 8ngineera. Transactions.V. ioq. g . 1155-1216.
Taylor, D.W. (1948). Fundaixentala o f so3 1 Meohanios.
J.
\*11sy andSons, New York. 700 p.
Teraaghi, 11.
(1943).
Theoretiaal S o i l b o h a n i o s .J a
Miley and Sons,L E G E N D : B E A A / N G P e E S S U g E S / N T O N S P E A 59. F r 2 . 7 6 -- F O O T I N G E L E I/. ,I 11 B,D,E+ F B O R I N ~ L O C 0 10
. . . .
20 30 FT. S C A L E .FOUNDATION
P R E S S U R E S
IN
TONS
P E R
SQUAQE-
F O O T ,
P R E S S I O N S
DE
F O N D A T I O N
E N
T O N N E S
PAR P I E D
CARRE.
F
I
G,
3
ILLUSTRATIONS
OF
TYPICAL
SETTLEMENT
CqACYS
IN
B A S
EM
E N T o
I t L U S T R A T t O N S
DE.
FISSURES
S 7 R E S S / N TOMS P E R SqUAGE F O O T
F I G ,
5
C U R V E S
OF
VERTICAL
S T R E S S
U N V E - R
T Y P I C A L
POINTS,
COURBES
DL
PRESSIONS
VE-RTICALLS
SOUS
'u rqo
9
'J, ! a 5 'u 1 F I G . 6 D I S T R ! B U T l O N O F G R A I N S I Z E W I T H PEPTH (M.I.T. C L A S S I F I C A T I ~ N ). C O b d l P P S IT ION G S A N U L O ~ I ~ T R I Q U E E N F3NCTION PE L A P R 3 F O N D E U q ,LLI
.
6
195 d?4
F1 G .
7
VAR1:ATION
OF WATERCONTENT
A N DATTERBERG
LI
M ITS W I T HD E P T H .
VARIATIGN
DE-
LA
T E N E - U R
ENEAU LT
LIMITES D'ATTERBERG EN FONLTION
F I G
8
VARIATION OF U N C O N F I N E D COMPRESSJONSTRENGTH WITH DEPTH.
V A q l A T l O N DL L A D ~ S I S T A N C L A L A C O M P R E S S I O N NONCONTRAINTE. EN
F l G . 9 T Y P I C A L P R E S S U R E - V O I D R A T I O CURVLS-
COURBES
CA~ACTLRISTIQUES
DES POURCENTAGESF1
G . I0 V A R I A T l O NOF
OVERBURDENA N D
PRLCONSOLIDATION
STRESSES
V I T HDEPTH.
VARIATION
PESPRESSIONS
D ~ S AU POIDDU
SOL
ET
P R ~ C O N S O L I V A T I O N
EN FONCTIONVE
L APROFONDELIR.
? 1.0 2.0 3 ? F T . S C A L L C O N T O U q INTERVAL 0-10 FEET F1G.11 MEASURED S E T T L E M E N T C O N T O U ~ S ~