Indexed by:期刊论文

First Author:Li, Gang

Correspondence Author:Yang, Q (reprint author), Dalian Univ Technol, Inst Geotech Engn, Dalian, Peoples R China.

Co-author:Zhang, Jin-li,Yang, Qing,Jiang, Ming-jing

Date of Publication:2017-02-01

Journal:EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING

Included Journals:SCIE、EI

Document Type:J

Volume:21

Issue:2

Page Number:172-192

ISSN No.:1964-8189

Key Words:Dalian offshore airport; marine clays; artificial island; triaxial creep test; centrifugal test; elasto-viscoplastic model; numerical simulation

Abstract:This paper presents a testing and numerical study on the deformation behaviours of marine clays from Jinzhou Bay, China, where a large-scale artificial island is under construction for the Dalian offshore airport. The mechanical behaviours of marine clays were investigated by laboratory tests, triaxial creep tests and centrifugal test. An elasto-viscoplastic constitutive model (Adachi-Oka model) and a finite element programme (CFEM 2D) were used to calculate the deformation of the marine clays. The validation of the elasto-viscoplastic model and finite element programme was initially verified by the numerical simulation of triaxial creep test and the centrifugal test. In addition, the settlement of the large-scale artificial island was calculated by the verified programme, which accounted for the effect of non-linear hydraulic conductivity. The calculated results show that differential settlement exists between functional areas, with the greatest post-construction settlement attaining 288 cm in 100 years. Uneven distribution of excess pore water pressure also exists, and does not fully dissipate in 100 years. It can be concluded that the settlement of the artificial island will continue, hence enough attention should be paid.

Translation or Not:no