SERVICE LIFE DESIGN AND ASSESSMENT FOR CONCRETE STRUCTURES IN HZM SEA LINK PROJECT FOR 120 YEARS

Author(s): Kefei Li, Dongdong Zhang, Quanwang Li
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 86-95
Total Pages: 9
Language : English

Abstract: The ongoing mega project of Hong Kong – Zhuhai-Macau (HZM) sea link project consists of
sea bridges of 28.8km, an immersed tube tunnel of 6.8 km and two offshore artificial islands.
One of the major challenges of this project is to ensure a service life of 120 years for the
concrete structures in a rather aggressive marine environment. This paper gives a
comprehensive presentation on the durability design and the durability assessment for the
concrete elements and structures in the project. For the durability design, the general
philosophy and approaches are given for the concrete elements, and model-based design is
conducted for the carbonation-induced and chloride induced corrosion of steel rebars. The
durability requirements are obtained from this model-based design process. During the
construction phase, the durability requirements are represented by quality control parameters,
and in-situ tests are performed to collect the data for these parameters. On the basis of the
statistical properties of these parameters, the achieved durability extent of concrete elements
is evaluated through a systematic durability assessment process. On the basis of the
assessment results, a preliminary maintenance planning is formulated for the service life

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00