Mooring dolphin platforms (MDPs) with three caisson foundations were installed in the ice-drifting Bohai Sea of China. Before installation, prototype tests of penetration and removal processing were conducted near the design site. To determine the lateral soil pressure and skin friction of the caisson, soil pressure and strain gauge transducers were fixed along the external skirt of caisson B of MDP1. The shaft skin friction was calculated from the strain difference between any two points of the strain gauges. The transducer results indicated that when the soil property determined by unconsolidated and undrained (UU) triaxial tests was used to calculate the unit skin friction resistance, a value of the adhesion factor α of 1.5–2.0 is recommended. The factor α is 1–0.4 during the suction-assisted penetration phase. The lateral earth pressure coefficient K decreased with penetration depth, most likely due to seepage caused by underpressure. In addition, the difference between the measured values obtained from the soil pressure transducers represented the small tilt of MDP1 during the installation phase. The skin friction and lateral earth pressure significantly decreased in the removal phase, 12 h after the penetration phase, mainly due to the soil disturbance caused by suction penetration around the caisson.

References

References
1.
Colliat
,
J. L.
,
Boisard
,
P.
,
Sparrevik
,
P.
, and
Gramet
,
J. C.
,
1998
, “
Design and Installation of Suction Anchor Piles at Soft Clay Site
,”
J. Waterway Port Coastal Ocean Eng.
,
124
(
4
), pp.
179
188
.10.1061/(ASCE)0733-950X(1998)124:4(179)
2.
Barari
,
A.
, and
Ibsen
,
L. B.
,
2012
, “
Undrained Response of Bucket Foundations to Moment Loading
,”
Appl. Ocean Res.
,
36
(
1
), pp.
12
21
.10.1016/j.apor.2012.01.003
3.
Cassidy
,
M. J.
,
Byrne
,
B. W.
, and
Randolph
,
M. F.
,
2004
, “
A Comparison of the Combined Load Behaviour of Spudcan and Caisson Foundations on Soft Normally Consolidated Clay
,”
Géotechnique
,
54
(
2
), pp.
91
106
.10.1680/geot.2004.54.2.91
4.
Bransby
,
M. F.
, and
Yun
G. J.
,
2009
, “
The Undrained Capacity of Skirted Strip Foundations Under Combined Loading
,”
Géotechnique
,
59
(
2
), pp.
115
125
.10.1680/geot.2007.00098
5.
Kwag
,
D. J.
,
Cho
,
I. H.
,
Bang
,
S.
, and
Cho
,
Y.
,
2010
, “
Embedded Suction Anchors for Mooring of a Floating Breakwater
,”
ASME J. Offshore Mech. Arct. Eng.
,
132
(
2
), p.
021603
.10.1115/1.4000400
6.
Cassidy
,
M. J.
,
Randolph
,
M. F.
, and
Byrne
,
B. W.
,
2006
, “
A Plasticity Model Describing Caisson Behaviour in Clay
,”
Appl. Ocean Res.
,
28
(
5
), pp.
345
358
.10.1016/j.apor.2006.08.005
7.
Vlahos
,
G.
,
Cassidy
,
M. J.
, and
Knowles
,
B.
,
2005
, “
A Comparative Assessment of the Use of Spudcans and Caissons as the Foundations of Jack-up Structures
,”
Proc. 24th Int. Conf. on Offshore Mechanics and Arctic Engineering (OMAE)
,
Halkidiki, Greece
, Paper No. OMAE2005-67090.
8.
Ding
,
H.
,
Qi
,
L.
, and
Xu
,
J.
,
2001
, “
Bucket Foundation Platforms Installed in Shallow and Ice-Drifting Area
,”
J. Cold Reg. Eng.
,
15
(
4
), pp.
211
218
.10.1061/(ASCE)0887-381X(2001)15:4(211)
9.
Bang
,
S.
,
Jones
,
K.
,
Kim
,
Y. S.
, and
Cho
,
Y.
,
2010
, “
Horizontal Capacity of Embedded Suction Anchors in Clay
,”
ASME J. Offshore Mech. Arct. Eng.
,
133
(
1
), p.
011104
.10.1115/1.4001951
10.
Byrne
,
B. W.
, and
Houlsby
,
G. T.
,
2004
, “
Experimental Investigations of the Response of Suction Caissons to Transient Combined Loading
,”
J. Geotech. Geoenviron.
,
130
(
3
), pp.
240
253
.10.1061/(ASCE)1090-0241(2004)130:3(240)
11.
Colliat
,
J. L.
,
Dendani
,
H.
, and
Schroeder
,
K.
,
2007
, “
Installation of Suction Piles at Deepwater Sites in Angola
,”
Proc. Int. Conference on Offshore Site Investigation and Geotechnics
,
SUT OSIG, London
.
12.
Erbrich
,
C. T.
, and
Tjelta
,
T. I.
,
1999
, “
Installation of Bucket Foundations and Bucket Foundations in Sand: Geotechnical Performance
,”
Proceedings of 31st Annual Offshore Technology Conference
, Paper No. OTC 10990.
13.
Clukey
,
E. C.
,
Aubeny
,
C. P.
, and
Murff
,
J. D.
,
2005
, “
Comparison of Analytical and Centrifuge Model Tests for Suction Caissons Subjected to Combined Loads
,”
ASME J. Offshore Mech. Arct. Eng.
,
126
(
4
), pp.
364
367
.10.1115/1.1834624
14.
Gaudin
,
C.
,
Cassidy
,
M. J.
,
Bienen
,
B.
, and
Hossain
,
M. S.
,
2011
, “
Recent Contributions of Geotechnical Centrifuge Modelling to the Understanding of Jack-Up Spudcan Behaviour
,”
Ocean Eng.
,
38
(
7
), pp.
900
914
.10.1016/j.oceaneng.2010.12.001
15.
Gaudin
,
C.
,
Cluckey
,
E. C.
,
Garnier
,
J.
, and
Phillips
,
R.
,
2010
, “
New Frontiers for Centrifuge Modeling in Offshore Geotechnics
,”
Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics
,
Perth, Australia
, pp.
155
188
.
16.
Villalobos
,
F. A.
,
Byrne
,
B. W.
, and
Houlsby
,
G. T.
,
2010
, “
Model Testing of Suction Caissons in Clay Subjected to Vertical Loading
,”
Appl. Ocean Res.
,
32
(
4
), pp.
414
424
.10.1016/j.apor.2010.09.002
17.
Cao
,
J.
,
Phillips
,
R.
,
Popescu
,
R.
,
Al-Khafaji
,
Z.
, and
Audibert
,
J. M. E.
,
2002
, “
Penetration Resistance of Bucket Foundations in Clay
,”
Proceedings of 12th International Offshore and Polar Engineering Conference
, pp.
800
806
.
18.
Tran
,
M. N.
,
Randolph
,
M. F.
, and
Airey
,
D. W.
,
2007
, “
Installation of Bucket Foundations in Sand With Silt Layers
,”
J. Geotech. Geoenviron.
,
133
(
10
), pp.
1183
1191
.10.1061/(ASCE)1090-0241(2007)133:10(1183)
19.
Chen
,
W.
, and
Randolph
,
M. F.
,
2007
, “
Uplift Capacity of Suction Caissons Under Sustained and Cyclic Loading in Soft Clay
,”
J. Geotech. Geoenviron.
,
133
(
11
), pp.
1352
1363
.10.1061/(ASCE)1090-0241(2007)133:11(1352)
20.
Colliat
,
J. L.
, and
Colliard
,
D.
,
2010
, “
Set-Up of Suction Piles in Deepwater Gulf of Guinea Clays
,”
Frontiers in Offshore Geotechnics II: Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics
,
Perth, Australia
.
21.
Andersen
,
K. H.
, and
Jostad
,
H. P.
,
2002
, “
Shear Strength Along Outside Wall of Suction Anchors in Clay After Installation
,”
Proceedings of the Twelfth International Offshore and Polar Engineering Conference
.
Kitakyushu, Japan
.
22.
Andersen
,
K. H.
, and
Jostad
,
H. P.
,
2004
, “
Shear Strength Along Inside of Suction Anchor Skirt Wall in Clay
,”
Offshore Technology Conference OTC16844
,
Houston, Texas
.
23.
Norwegian Geotechnical Institute
,
2000
, “
Set-up Effects inside Skirted Anchors in Clay. Recommended Design Procedure
,”
Joint Industry Project
, NGI Report No. 20001027-1.
You do not currently have access to this content.