TY - GEN
T1 - Constructing breakwater with prefabricated caissons on soft clay
AU - Yan, S.
AU - Feng, X.
AU - Chu, J.
PY - 2011
Y1 - 2011
N2 - A case history of constructing offshore breakwater on soft clay is presented. The breakwater was constructed near the Shanghai Port, China, for deepening of navigation channel along the Yangtze Estuary. The breakwater elements were designed as gravity retaining structures using prefabricated, semi-circular shaped concrete caissons. Some sections of the breakwater were installed on a thick layer of soft soils. During the construction, the caissons in one section failed under a heavy storm. The causes of failure were investigated by running dynamic triaxial tests on undisturbed soil samples taken from the construction site. It was found that the dike failure was induced by the strength weakening of the soft soil layer below the foundation. The design of the guide dike and the soil improvement works are described in this paper. Surcharge preloading and prefabricated vertical drains was adopted to improve the soft soils below the caisson. The soil improvement measure was proven to be effective in maintaining the stability of the breakwater against subsequent heavy storms.
AB - A case history of constructing offshore breakwater on soft clay is presented. The breakwater was constructed near the Shanghai Port, China, for deepening of navigation channel along the Yangtze Estuary. The breakwater elements were designed as gravity retaining structures using prefabricated, semi-circular shaped concrete caissons. Some sections of the breakwater were installed on a thick layer of soft soils. During the construction, the caissons in one section failed under a heavy storm. The causes of failure were investigated by running dynamic triaxial tests on undisturbed soil samples taken from the construction site. It was found that the dike failure was induced by the strength weakening of the soft soil layer below the foundation. The design of the guide dike and the soil improvement works are described in this paper. Surcharge preloading and prefabricated vertical drains was adopted to improve the soft soils below the caisson. The soil improvement measure was proven to be effective in maintaining the stability of the breakwater against subsequent heavy storms.
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M3 - Conference contribution
AN - SCOPUS:84860234723
SN - 9780415584807
T3 - Frontiers in Offshore Geotechnics II - Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics
SP - 451
EP - 456
BT - Frontiers in Offshore Geotechnics II - Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics
T2 - 2nd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2010
Y2 - 8 November 2010 through 10 November 2010
ER -