28 1C · 2008 1 − 41 −

28 1C ·2008 1
pp. 41~51
A Study on the p-y Curves by Small-Scale Model Tests
*·**·***
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Abstract
The load distribution and deformation of single piles which is embedded in Jumunjin sand and Kimhae clay are investigated, based on small scale model tests. Special attention is given to the consideration of flexural rigidity in laterally loaded piles. To consider the flexural rigidity of the pile, tests are performed with the aluminium piles of three different length under different relative densities and undrained shear strength. The test results indicate that the initial slope from the results of tests is pro- portional to the depth and pile-soil rigidity in both soils. But the increasing rate of the initial slope in the clay is less than in the sand. In addition, the soil resistance is more related to the depth and soil condition than the pile rigidity. Base on the test results, an empirical formula is proposed, which is good agreement with previously published small scale model test and field lateral load test.
Keywords : p-y curve,pile-soil rigidity,initial slope,soil resistance
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. . 3 ( ) ( ) . p-y - . . p-y .
: p-y , - , p-y ,
·····························································································································································································································
, .
, , ,
,

. - cyclic



.
,

. p-y

.
p-y (Kubo, 1964; Matlock, 1970; Reese et al., 1975; Welch
and Reese, 1972; Evans and Duncan, 1982; Murchisn
and O'Neill, 1984; Georgiadis et al., 1992; Reese and
Wang, 1997) p-
y
* (E-mail : ts_kim@kdc.co.kr) ** (E-mail : soj9081@yonsei.ac.kr)
*** (E-mail : akuma81@yonsei.ac.kr)
− 42 −
1998, 1999, 2000)
,
, ,
(2005) Pile-Bent ,


p-y



.

p-y
,
.
2.
.
2.1
,
, 2cm
1.0×1.5×1.0m ( 2.1
), 2cm
80cm× 1.0m ( 2.2 )
. Ring
type 25cm
.

.

2.1 2.2 .
2.3
EN AW 6063-T5 0.40
m, 0.65m, 0.85m 3 ,
European Aluminium Association
Physical & Elastic Properties ( 2.3
).
28 1C · 2008 1 − 43 −
2.3.2
-
.
( 2.4 ),
Davisson (1970)
( 2.4 ) 40% 80%
( 2.6 ).

Davisson
17kPa 40kPa
( 2.7 ).
) , .
2.4
.
ASTM D 3966-90(optional)
.
Traveling
spreader 3 Pluviation

( 2.8 ).
2.1. ( )

(mm) Dmin 0.075(No. 200)
10% (mm) D10 0.35
60% (mm) D60 0.57
Cu 1.63
Cc 1.02
Gs 2.63
(%) w 0
2.2. ()

Cu 1.82
Cc 0.111
Gs 2.604
(%) LL 63
(%) PL 29.3
(%) PI 33.7
2.3.
2.4. (Davisson, 1970)
nh
277 ~ 2770 t/m3
(peat) nh 6 t/m3
nh 67 cu
2.5. (Broms )

- 2.0 < ηL < 4.0
,
(L=0.40m) 1.75 1.94
(L=0.65m) 3.00 3.32
(L=0.85m) 4.00 4.43
2.7. ()
(L=0.40m) 1.14 1.58
(L=0.65m) 2.42 2.99
(m) (m)
(%)1 2 3
− 44 −
±1.8% .
2.4.2
17kPa 40kPa
.
Field vane test -
( 2.3 ),


.
10cm

.
(3.1) (
3.1 ) curve-fitting x-y
4 ( (3.2)~ (3.3) )
.
( 3.1 ) p-y
( 3.2 ).

.



( 3.3(a) ).



.
,
( 3.3(b)
).
(
3.4(a) ),
.


. 0.45L~
0.50L .

( 3.4(b) ).

.
cu=17kPa 0.40m
0.45L, 0.65m 0.5L, cu=40kPa
0.3L, 0.5L .
y
Kondner(1963)

M EIε y
p-y
p-y .

p-y
Palmer & Thompson(1948)
.
( 3.5(a) ).





( 3.5(b) ).


3.1
− 46 −
(1997) 6D 0.18m

( 3.1 ).
3.2 p-y
3.3
28 1C · 2008 1 − 47 −
3.6
S
.
,

.

.
3.4
3.5 p-y (kh)
3.1


− 48 −
p-y
,

. p-y


4.1
, Palmer & Thompson
(1948) .
z : (m)
(4.2) .
(4.2)
(4.3)
(4.4)
, B log
A . A B
.
4.1
4.2
4.1
A, B 4.3 .
kini nh z D ----=
B ×=
kini
Y BX logA+=

Terzaghi 700 ~ 2100 2100 ~ 7200 7200 ~ 14100
Reese 5500 16600 34600
2200 6700 18000
Dr=40% 12742 Dr=80% 22714
4.2. (kN/m3)
nh(kN/m3)
Terzaghi(1955) 4.7~97
cu=17kPa 50 cu=40kPa 90
28 1C · 2008 1 − 49 −
Davisson “
” 0%=2770, 100%=27700


.
.
4.2.1
(4.8)

4.2
A, B 4.4 .
4.2.2
,
.

(4.14) .
(4.15)
4.3 A
pu 3DγzKp=
pu cuNcD=
pu AcuDzB=
log pu
4.3. A, B
A B
67 1.486
4.4. A, B
A B
2.16 0.900
− 50 −

(2001)
p-y ,

.
(2001)
.
4.6 4.7
4.8 .
p-y .

( 4.4 ).

p-y .
4.9
4.10 ,

( 4.5 ).
p-y

p-y .
p-y ,

,
.
.
4.5. A, B
A B
2.87 0.547
(m)
4.7 ()
(g/)
(nh)
(m) (kh)
0.05 0.045 kg/ 0.027 kg/cm
0.10 0.168 kg/ 0.050 kg/cm
4.4 () 4.5. ()
4.9. ()
(m)
4.10. ()
(g/)
(nh)
28 1C · 2008 1 − 51 −
. ,
.

.
2.

.

.

.

.
,
.

.

, (1999e) , , , 15, 6, pp. 167-185
, (1999f) , 99 , , pp. 3-44
, (1999) p-y , , , 19 , -1, pp. 105-115.
, , (1999d) , , , 15, 6, pp. 29-44.
, , (2000) ,
, , 16, 4, pp. 5-16. , , , (1997) (I) - -, , , 13, 5, pp. 59-74.
, , , (1998) Behavior and Analysis of Laterally Loaded Deep Foundations in Nak-dong river
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, (2001) , , , 17, 6, pp. 193-205.
, , (2005) Pile-Bent , 2005 , .
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Reese, L.C., and Cox, W.R., and Koop, F.D. (1974) Analysis of lat- erally loaded piles in sand, Proc. 6th Offshore Technology Con- ference, Dallas, Texas, pp. 473-483.
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The MATTER project (2001) Physical and Elastic Properties, Euro- pean aluminium association and T University of Liverfool.
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