Abstract: The analysis and prediction of seawall foundation's post construction settlements are very meaningful for engineering maintenance and disaster prevention. Based on seawall's early post-monitoring data in the initial stage of construction, the soil consolidation coefficient is inversed by using layer-wise summation method and Terzaghi's consolidation theory; and an analysis is also carried out the variation laws of consolidation coefficient. In this way, the authors adopt the improved variable dimension fractal prediction models to forecast the consolidation coefficient with strong trends; and then predict the contingent long-term post construction settlement of seawall. As a test, the prediction model is applied to the seawall monitoring data of Beidaihou second east-causeway project (located in Dongtou County of Zhejiang Province). As a result, it reflects well the mechanism of soil body’s consolidation and settlement, and predicts better the trend of seawall’s post construction settlement.

Key words: seawall, consolidation coefficient, inversion, fractal theory, prediction