Global quality of rock works for permanent shiplock of the Three Gorges Project on Yangtze river, China

Abstract

The methodology of meta-synthesis is accepted to evaluate the quality of rock works for permanent shiplock of the Three Gorges Project. The input data include geological information, results of computational analysis, as well as monitored data and represent knowledge of multiple sources from experiences, theoretical deduction and measurements. The global quality of rock works is of high complexity, therefore, all the factors of preexisting rock properties, engineering measures taken in design and construction, and performance of rock behavior should be considered. The assessment of individual factors of influence provides a necessary basis for comprehensive evaluation. A fuzzy rule is used to give a global understanding of the quality of rock engineering work. The obtained results show that the global quality of the Three Gorges rock shiplock can be ranged as GOOD to EXELLENT (B+), and it should meet the requirements of long term function of the project.