Journal of Shanghai Jiao Tong University ›› 2016, Vol. 50 ›› Issue (03): 443-447.

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Back Analysis of Permeability Parameters Under Unsteady Seepage of Seawall

HUANG Ming1,2,LU Yingshou1,LAN Zhuguang1,LIU Jun3   

  1. (1. School of Civil Engineering, Hefei University of Technology, Hefei 230009, China; 2. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of the Ministry of Education (China Three Gorges University),Yichang 443002, Hubei, China; 3. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2015-04-28 Online:2016-03-28 Published:2016-03-28

Abstract: Abstract: Unsteady seepage of seawall was studied by using the finite element method in view of the effect of rapid fluctuation tidal. The back analysis objective function was constructed based on the finite element analysis results together with monitoring values. Then, the back analysis process of the permeability parameters of seawall was presented. The hierarchical searching technique was used in the back analysis. The small reasonable region of parameters was determined by the stepwise scanning method while the first order gradient optimization algorithm was used to confirm permeability parameters in the above region. The permeability parameters confirmed by back analysis were used in seawall unsteady seepage calculation. The instance shows that the calculation and back analysis process are reasonable and feasible, and the seepage pressure simulation results agree very well with monitoring sequences not only in numerical values but also in dynamic rules.

Key words: Key words: seawall, unsteady seepage, back analysis of parameters, hierarchical searching technique

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